Add etcd as prerequisite for multi-user in gateway (#7022)

This PR implements following condition types

- StringEqualsIgnoreCase and StringNotEqualsIgnoreCase
- BinaryEquals

.github/ISSUE_TEMPLATE.md

@@ -24,6 +24,10 @@
 <!--- How has this issue affected you? What are you trying to accomplish? -->
 <!--- Providing context helps us come up with a solution that is most useful in the real world -->
 
+## Regression
+<!-- Is this issue a regression? (Yes / No) -->
+<!-- If Yes, optionally please include minio version or commit id or PR# that caused this regression, if you have these details. -->
+
 ## Your Environment
 <!--- Include as many relevant details about the environment you experienced the bug in -->
 * Version used (`minio version`):

.github/PULL_REQUEST_TEMPLATE.md

@@ -7,6 +7,10 @@
 <!--- Why is this change required? What problem does it solve? -->
 <!--- If it fixes an open issue, please link to the issue here. -->
 
+## Regression
+<!-- Is this PR fixing a regression? (Yes / No) -->
+<!-- If Yes, optionally please include minio version or commit id or PR# that caused this regression, if you have these details. -->
+
 ## How Has This Been Tested?
 <!--- Please describe in detail how you tested your changes. -->
 <!--- Include details of your testing environment, and the tests you ran to -->

.gitignore

@@ -22,3 +22,4 @@ parts/
 prime/
 stage/
 .sia_temp/
+config.json

.travis.yml

@@ -1,42 +1,46 @@
 go_import_path: github.com/minio/minio
-sudo: required
-
-services:
- - docker
-
-dist: trusty
 
 language: go
 
+# this ensures PRs based on a local branch are not built twice
+# the downside is that a PR targeting a different branch is not built
+# but as a workaround you can add the branch to this list
+branches:
+  only:
+    - master
+
 matrix:
   include:
     - os: linux
+      dist: trusty
+      sudo: required
       env:
         - ARCH=x86_64
-      go: 1.10.1
+      go: 1.10.4
       script:
         - make
         - diff -au <(gofmt -s -d cmd) <(printf "")
         - diff -au <(gofmt -s -d pkg) <(printf "")
         - make test GOFLAGS="-timeout 15m -race -v"
+        - make verify
         - make coverage
-        - node --version
         - cd browser && yarn && yarn test && cd ..
-    - os: linux-ppc64le
+    - os: windows
       env:
-        - ARCH=ppc64le
-      go: 1.10.1
+        - ARCH=x86_64
+      go: 1.10.4
       script:
-        - make
-        - diff -au <(gofmt -s -d cmd) <(printf "")
-        - diff -au <(gofmt -s -d pkg) <(printf "")
-        - make test GOFLAGS="-timeout 15m -v"
-        - make coverage
-        - node --version
-        - cd browser && yarn && yarn test && cd ..
+        - go build --ldflags="$(go run buildscripts/gen-ldflags.go)" -o %GOPATH%\bin\minio.exe
+        - for d in $(go list ./... | grep -v browser); do go test -v -race --timeout 20m "$d"; done
+        - bash buildscripts/go-coverage.sh
+
+before_script:
+  # Add an IPv6 config - see the corresponding Travis issue
+  # https://github.com/travis-ci/travis-ci/issues/8361
+  - if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then sudo sh -c 'echo 0 > /proc/sys/net/ipv6/conf/all/disable_ipv6'; fi
 
 before_install:
-- nvm install stable
+ - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then nvm install stable ; fi
 
 after_success:
-- bash <(curl -s https://codecov.io/bash)
+- bash <(curl -s https://codecov.io/bash)

Dockerfile

@@ -1,28 +1,32 @@
-FROM golang:1.10.1-alpine3.7
+FROM golang:1.10.4-alpine3.7
 
 LABEL maintainer="Minio Inc <dev@minio.io>"
 
 ENV GOPATH /go
-ENV PATH $PATH:$GOPATH/bin
 ENV CGO_ENABLED 0
+
+WORKDIR /go/src/github.com/minio/
+
+RUN  \
+     apk add --no-cache git && \
+     go get -v -d github.com/minio/minio && \
+     cd /go/src/github.com/minio/minio && \
+     go install -v -ldflags "$(go run buildscripts/gen-ldflags.go)"
+
+FROM alpine:3.7
+
 ENV MINIO_UPDATE off
 ENV MINIO_ACCESS_KEY_FILE=access_key \
     MINIO_SECRET_KEY_FILE=secret_key
 
-WORKDIR /go/src/github.com/minio/
+EXPOSE 9000
 
+COPY --from=0 /go/bin/minio /usr/bin/minio
 COPY dockerscripts/docker-entrypoint.sh dockerscripts/healthcheck.sh /usr/bin/
 
 RUN  \
-     apk add --no-cache ca-certificates curl && \
-     apk add --no-cache --virtual .build-deps git && \
-     echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \
-     go get -v -d github.com/minio/minio && \
-     cd /go/src/github.com/minio/minio && \
-     go install -v -ldflags "$(go run buildscripts/gen-ldflags.go)" && \
-     rm -rf /go/pkg /go/src /usr/local/go && apk del .build-deps
-
-EXPOSE 9000
+     apk add --no-cache ca-certificates 'curl>7.61.0' && \
+     echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf
 
 ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]
 

Dockerfile.dev

@@ -1,27 +1,20 @@
-FROM golang:1.10.1-alpine3.7
+FROM alpine:3.7
 
 LABEL maintainer="Minio Inc <dev@minio.io>"
 
-ENV GOPATH /go
-ENV PATH $PATH:$GOPATH/bin
-ENV CGO_ENABLED 0
+COPY dockerscripts/docker-entrypoint.sh dockerscripts/healthcheck.sh /usr/bin/
+COPY minio /usr/bin/
+
 ENV MINIO_UPDATE off
 ENV MINIO_ACCESS_KEY_FILE=access_key \
     MINIO_SECRET_KEY_FILE=secret_key
 
-WORKDIR /go/src/github.com/minio/
-
-COPY dockerscripts/docker-entrypoint.sh dockerscripts/healthcheck.sh /usr/bin/
-
-COPY . /go/src/github.com/minio/minio
-
-RUN  \
-     apk add --no-cache ca-certificates curl && \
-     apk add --no-cache --virtual .build-deps git && \
+RUN \
+     apk add --no-cache ca-certificates 'curl>7.61.0' && \
      echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \
-     cd /go/src/github.com/minio/minio && \
-     go install -v -ldflags "$(go run buildscripts/gen-ldflags.go)" && \
-     rm -rf /go/pkg /go/src /usr/local/go && apk del .build-deps
+     chmod +x /usr/bin/minio  && \
+     chmod +x /usr/bin/docker-entrypoint.sh && \
+     chmod +x /usr/bin/healthcheck.sh
 
 EXPOSE 9000
 

Dockerfile.release

@@ -9,8 +9,7 @@ ENV MINIO_ACCESS_KEY_FILE=access_key \
     MINIO_SECRET_KEY_FILE=secret_key
 
 RUN \
-     apk add --no-cache ca-certificates && \
-     apk add --no-cache --virtual .build-deps curl && \
+     apk add --no-cache ca-certificates 'curl>7.61.0' && \
      echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \
      curl https://dl.minio.io/server/minio/release/linux-amd64/minio > /usr/bin/minio && \
      chmod +x /usr/bin/minio  && \

Makefile

@@ -13,7 +13,7 @@ checks:
 	@(env bash $(PWD)/buildscripts/checkgopath.sh)
 
 getdeps:
-	@echo "Installing golint" && go get -u github.com/golang/lint/golint
+	@echo "Installing golint" && go get -u golang.org/x/lint/golint
 	@echo "Installing gocyclo" && go get -u github.com/fzipp/gocyclo
 	@echo "Installing deadcode" && go get -u github.com/remyoudompheng/go-misc/deadcode
 	@echo "Installing misspell" && go get -u github.com/client9/misspell/cmd/misspell
@@ -23,8 +23,8 @@ verifiers: getdeps vet fmt lint cyclo deadcode spelling
 
 vet:
 	@echo "Running $@"
-	@go tool vet -atomic -bool -copylocks -nilfunc -printf -shadow -rangeloops -unreachable -unsafeptr -unusedresult cmd
-	@go tool vet -atomic -bool -copylocks -nilfunc -printf -shadow -rangeloops -unreachable -unsafeptr -unusedresult pkg
+	@go tool vet cmd
+	@go tool vet pkg
 
 fmt:
 	@echo "Running $@"
@@ -42,8 +42,8 @@ ineffassign:
 
 cyclo:
 	@echo "Running $@"
-	@${GOPATH}/bin/gocyclo -over 100 cmd
-	@${GOPATH}/bin/gocyclo -over 100 pkg
+	@${GOPATH}/bin/gocyclo -over 200 cmd
+	@${GOPATH}/bin/gocyclo -over 200 pkg
 
 deadcode:
 	@echo "Running $@"
@@ -61,6 +61,8 @@ check: test
 test: verifiers build
 	@echo "Running unit tests"
 	@go test $(GOFLAGS) -tags kqueue ./...
+
+verify: build
 	@echo "Verifying build"
 	@(env bash $(PWD)/buildscripts/verify-build.sh)
 
@@ -73,6 +75,9 @@ build: checks
 	@echo "Building minio binary to './minio'"
 	@CGO_ENABLED=0 go build -tags kqueue --ldflags $(BUILD_LDFLAGS) -o $(PWD)/minio
 
+docker: build
+	@docker build -t $(TAG) . -f Dockerfile.dev
+
 pkg-add:
 	@echo "Adding new package $(PKG)"
 	@${GOPATH}/bin/govendor add $(PKG)

README.md

@@ -17,7 +17,7 @@ docker run -p 9000:9000 minio/minio server /data
 docker pull minio/minio:edge
 docker run -p 9000:9000 minio/minio:edge server /data
 ```
-Please visit Minio Docker quickstart guide for more [here](https://docs.minio.io/docs/minio-docker-quickstart-guide)
+Note: Docker will not display the autogenerated keys unless you start the container with the `-it`(interactive TTY) argument. Generally, it is not recommended to use autogenerated keys with containers. Please visit Minio Docker quickstart guide for more information [here](https://docs.minio.io/docs/minio-docker-quickstart-guide)
 
 ## macOS
 ### Homebrew

appveyor.yml

@@ -1,55 +0,0 @@
-# version format
-version: "{build}"
-
-# Operating system (build VM template)
-os: Windows Server 2012 R2
-
-# Platform.
-platform: x64
-
-clone_folder: c:\gopath\src\github.com\minio\minio
-
-# Environment variables
-environment:
-  GOPATH: c:\gopath
-  GOROOT: c:\go
-
-# scripts that run after cloning repository
-install:
-  - set PATH=%GOPATH%\bin;%GOROOT%\bin;%PATH%
-  - go version
-  - go env
-  - python --version
-
-# To run your custom scripts instead of automatic MSBuild
-build_script:
-  # Compile
-  # We need to disable firewall - https://github.com/appveyor/ci/issues/1579#issuecomment-309830648
-  - ps: Disable-NetFirewallRule -DisplayName 'File and Printer Sharing (SMB-Out)'
-  - appveyor AddCompilationMessage "Starting Compile"
-  - cd c:\gopath\src\github.com\minio\minio
-  - go run buildscripts/gen-ldflags.go > temp.txt
-  - set /p BUILD_LDFLAGS=<temp.txt
-  - go build -ldflags="%BUILD_LDFLAGS%" -o %GOPATH%\bin\minio.exe
-  - appveyor AddCompilationMessage "Compile Success"
-
-# To run your custom scripts instead of automatic tests
-test_script:
-  # Unit tests
-  - ps: Add-AppveyorTest "Unit Tests" -Outcome Running
-  - mkdir build\coverage
-  - for /f "" %%G in ('go list github.com/minio/minio/... ^| find /i /v "browser/"') do ( go test -v -timeout 20m -race %%G )
-  - go test -v -timeout 20m -coverprofile=build\coverage\coverage.txt -covermode=atomic github.com/minio/minio/cmd
-  - ps: Update-AppveyorTest "Unit Tests" -Outcome Passed
-
-after_test:
-  - go tool cover -html=build\coverage\coverage.txt -o build\coverage\coverage.html
-  - ps: Push-AppveyorArtifact build\coverage\coverage.txt
-  - ps: Push-AppveyorArtifact build\coverage\coverage.html
-  # Upload coverage report.
-  - "SET PATH=C:\\Python34;C:\\Python34\\Scripts;%PATH%"
-  - pip install codecov
-  - codecov -X gcov -f "build\coverage\coverage.txt"
-
-# to disable deployment
-deploy: off

browser/app/js/alert/actions.js

@@ -22,7 +22,7 @@ export let alertId = 0
 export const set = alert => {
   const id = alertId++
   return (dispatch, getState) => {
-    if (alert.type !== "danger") {
+    if (alert.type !== "danger" || alert.autoClear) {
       setTimeout(() => {
         dispatch({
           type: CLEAR,

browser/app/js/buckets/BucketList.js

@@ -67,8 +67,12 @@ const mapDispatchToProps = dispatch => {
   return {
     fetchBuckets: () => dispatch(actionsBuckets.fetchBuckets()),
     setBucketList: buckets => dispatch(actionsBuckets.setList(buckets)),
-    selectBucket: bucket => dispatch(actionsBuckets.selectBucket(bucket))
+    selectBucket: (bucket, prefix) =>
+      dispatch(actionsBuckets.selectBucket(bucket, prefix))
   }
 }
 
-export default connect(mapStateToProps, mapDispatchToProps)(BucketList)
+export default connect(
+  mapStateToProps,
+  mapDispatchToProps
+)(BucketList)

browser/app/js/buckets/Policy.js

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { READ_ONLY, WRITE_ONLY, READ_WRITE } from '../constants'
+import { READ_ONLY, WRITE_ONLY, READ_WRITE, NONE } from '../constants'
 
 import React from "react"
 import { connect } from "react-redux"
@@ -42,37 +42,40 @@ export class Policy extends React.Component {
   render() {
     const {policy, prefix} = this.props
     let newPrefix = prefix
-
     if (newPrefix === '')
       newPrefix = '*'
 
-    return (
-      <div className="pmb-list">
-        <div className="pmbl-item">
-          { newPrefix }
+    if (policy === NONE) {
+      return <noscript />
+    } else {
+      return (
+        <div className="pmb-list">
+          <div className="pmbl-item">
+            { newPrefix }
+          </div>
+          <div className="pmbl-item">
+            <select className="form-control"
+              disabled
+              value={ policy }>
+              <option value={ READ_ONLY }>
+                Read Only
+              </option>
+              <option value={ WRITE_ONLY }>
+                Write Only
+              </option>
+              <option value={ READ_WRITE }>
+                Read and Write
+              </option>
+            </select>
+          </div>
+          <div className="pmbl-item">
+            <button className="btn btn-block btn-danger" onClick={ this.removePolicy.bind(this) }>
+              Remove
+            </button>
+          </div>
         </div>
-        <div className="pmbl-item">
-          <select className="form-control"
-            disabled
-            value={ policy }>
-            <option value={ READ_ONLY }>
-              Read Only
-            </option>
-            <option value={ WRITE_ONLY }>
-              Write Only
-            </option>
-            <option value={ READ_WRITE }>
-              Read and Write
-            </option>
-          </select>
-        </div>
-        <div className="pmbl-item">
-          <button className="btn btn-block btn-danger" onClick={ this.removePolicy.bind(this) }>
-            Remove
-          </button>
-        </div>
-      </div>
-    )
+      )
+    }
   }
 }
 

browser/app/js/buckets/__tests__/Policy.test.js

@@ -17,7 +17,7 @@
 import React from "react"
 import { shallow, mount } from "enzyme"
 import { Policy } from "../Policy"
-import { READ_ONLY, WRITE_ONLY, READ_WRITE } from "../../constants"
+import { READ_ONLY, WRITE_ONLY, READ_WRITE, NONE } from "../../constants"
 import web from "../../web"
 
 jest.mock("../../web", () => ({
@@ -31,6 +31,11 @@ describe("Policy", () => {
     shallow(<Policy currentBucket={"bucket"} prefix={"foo"} policy={READ_ONLY} />)
   })
 
+  it("should not render when policy is listed as 'none'", () => {
+    const wrapper = shallow(<Policy currentBucket={"bucket"} prefix={"foo"} policy={NONE} />)
+    expect(wrapper.find(".pmb-list").length).toBe(0)
+  })
+
   it("should call web.setBucketPolicy and fetchPolicies on submit", () => {
     const fetchPolicies = jest.fn()
     const wrapper = shallow(

browser/app/js/constants.js

@@ -23,6 +23,7 @@ export const minioBrowserPrefix = p.slice(0, p.indexOf("/", 1))
 export const READ_ONLY = "readonly"
 export const WRITE_ONLY = "writeonly"
 export const READ_WRITE = "readwrite"
+export const NONE = "none"
 
 export const SHARE_OBJECT_EXPIRY_DAYS = 5
 export const SHARE_OBJECT_EXPIRY_HOURS = 0

browser/app/js/objects/ObjectActions.js

@@ -57,7 +57,7 @@ export class ObjectActions extends React.Component {
     })
   }
   render() {
-    const { object, showShareObjectModal } = this.props
+    const { object, showShareObjectModal, shareObjectName } = this.props
     return (
       <Dropdown id={`obj-actions-${object.name}`}>
         <Dropdown.Toggle noCaret className="fia-toggle" />
@@ -77,7 +77,8 @@ export class ObjectActions extends React.Component {
             <i className="fa fa-trash" />
           </a>
         </Dropdown.Menu>
-        {showShareObjectModal && <ShareObjectModal object={object} />}
+        {(showShareObjectModal && shareObjectName === object.name) &&
+          <ShareObjectModal object={object} />}
         {this.state.showDeleteConfirmation && (
           <DeleteObjectConfirmModal
             deleteObject={this.deleteObject.bind(this)}
@@ -92,7 +93,8 @@ export class ObjectActions extends React.Component {
 const mapStateToProps = (state, ownProps) => {
   return {
     object: ownProps.object,
-    showShareObjectModal: state.objects.shareObject.show
+    showShareObjectModal: state.objects.shareObject.show,
+    shareObjectName: state.objects.shareObject.object
   }
 }
 

browser/app/js/objects/__tests__/ObjectActions.test.js

@@ -88,8 +88,21 @@ describe("ObjectActions", () => {
         object={{ name: "obj1" }}
         currentPrefix={"pre1/"}
         showShareObjectModal={true}
+        shareObjectName={"obj1"}
       />
     )
     expect(wrapper.find("Connect(ShareObjectModal)").length).toBe(1)
   })
+
+  it("shouldn't render ShareObjectModal when the names of the objects don't match", () => {
+    const wrapper = shallow(
+      <ObjectActions
+        object={{ name: "obj1" }}
+        currentPrefix={"pre1/"}
+        showShareObjectModal={true}
+        shareObjectName={"obj2"}
+      />
+    )
+    expect(wrapper.find("Connect(ShareObjectModal)").length).toBe(0)
+  })
 })

browser/app/js/objects/__tests__/actions.test.js

@@ -19,16 +19,29 @@ import thunk from "redux-thunk"
 import * as actionsObjects from "../actions"
 import * as alertActions from "../../alert/actions"
 import { minioBrowserPrefix } from "../../constants"
+import history from "../../history"
 
 jest.mock("../../web", () => ({
-  LoggedIn: jest.fn(() => true).mockReturnValueOnce(false),
-  ListObjects: jest.fn(() => {
-    return Promise.resolve({
-      objects: [{ name: "test1" }, { name: "test2" }],
-      istruncated: false,
-      nextmarker: "test2",
-      writable: false
-    })
+  LoggedIn: jest
+    .fn(() => true)
+    .mockReturnValueOnce(true)
+    .mockReturnValueOnce(false)
+    .mockReturnValueOnce(true)
+    .mockReturnValueOnce(true)
+    .mockReturnValueOnce(false),
+  ListObjects: jest.fn(({ bucketName }) => {
+    if (bucketName === "test-deny") {
+      return Promise.reject({
+        message: "listobjects is denied"
+      })
+    } else {
+      return Promise.resolve({
+        objects: [{ name: "test1" }, { name: "test2" }],
+        istruncated: false,
+        nextmarker: "test2",
+        writable: false
+      })
+    }
   }),
   RemoveObject: jest.fn(({ bucketName, objects }) => {
     if (!bucketName) {
@@ -160,6 +173,41 @@ describe("Objects actions", () => {
     })
   })
 
+  it("creates objects/RESET_LIST after failing to fetch the objects from bucket with ListObjects denied for LoggedIn users", () => {
+    const store = mockStore({
+      buckets: { currentBucket: "test-deny" },
+      objects: { currentPrefix: "" }
+    })
+    const expectedActions = [
+      {
+        type: "alert/SET",
+        alert: {
+          type: "danger",
+          message: "listobjects is denied",
+          id: alertActions.alertId,
+          autoClear: true
+        }
+      },
+      {
+        type: "object/RESET_LIST"
+      }
+    ]
+    return store.dispatch(actionsObjects.fetchObjects()).then(() => {
+      const actions = store.getActions()
+      expect(actions).toEqual(expectedActions)
+    })
+  })
+
+  it("redirect to login after failing to fetch the objects from bucket for non-LoggedIn users", () => {
+    const store = mockStore({
+      buckets: { currentBucket: "test-deny" },
+      objects: { currentPrefix: "" }
+    })
+    return store.dispatch(actionsObjects.fetchObjects()).then(() => {
+      expect(history.location.pathname.endsWith("/login")).toBeTruthy()
+    })
+  })
+
   it("creates objects/SET_SORT_BY and objects/SET_SORT_ORDER when sortObjects is called", () => {
     const store = mockStore({
       objects: {
@@ -244,7 +292,11 @@ describe("Objects actions", () => {
     const expectedActions = [
       {
         type: "alert/SET",
-        alert: { type: "danger", message: "Invalid bucket", id: 0 }
+        alert: {
+          type: "danger",
+          message: "Invalid bucket",
+          id: alertActions.alertId
+        }
       }
     ]
     return store.dispatch(actionsObjects.deleteObject("obj1")).then(() => {
@@ -355,7 +407,7 @@ describe("Objects actions", () => {
       store.dispatch(actionsObjects.downloadObject("obj1"))
       const url = `${
         window.location.origin
-      }${minioBrowserPrefix}/download/bk1/${encodeURI("pre1/obj1")}?token=''`
+      }${minioBrowserPrefix}/download/bk1/${encodeURI("pre1/obj1")}?token=`
       expect(setLocation).toHaveBeenCalledWith(url)
     })
 

browser/app/js/objects/actions.js

@@ -16,17 +16,15 @@
 
 import web from "../web"
 import history from "../history"
-import {
-  sortObjectsByName,
-  sortObjectsBySize,
-  sortObjectsByDate
-} from "../utils"
+import { sortObjectsByName, sortObjectsBySize, sortObjectsByDate } from "../utils"
 import { getCurrentBucket } from "../buckets/selectors"
 import { getCurrentPrefix, getCheckedList } from "./selectors"
 import * as alertActions from "../alert/actions"
+import * as bucketActions from "../buckets/actions"
 import { minioBrowserPrefix } from "../constants"
 
 export const SET_LIST = "objects/SET_LIST"
+export const RESET_LIST = "object/RESET_LIST"
 export const APPEND_LIST = "objects/APPEND_LIST"
 export const REMOVE = "objects/REMOVE"
 export const SET_SORT_BY = "objects/SET_SORT_BY"
@@ -45,6 +43,10 @@ export const setList = (objects, marker, isTruncated) => ({
   isTruncated
 })
 
+export const resetList = () => ({
+  type: RESET_LIST
+})
+
 export const appendList = (objects, marker, isTruncated) => ({
   type: APPEND_LIST,
   objects,
@@ -54,47 +56,54 @@ export const appendList = (objects, marker, isTruncated) => ({
 
 export const fetchObjects = append => {
   return function(dispatch, getState) {
-    const {
-      buckets: { currentBucket },
-      objects: { currentPrefix, marker }
-    } = getState()
+    const {buckets: {currentBucket}, objects: {currentPrefix, marker}} = getState()
     if (currentBucket) {
       return web
-      .ListObjects({
-        bucketName: currentBucket,
-        prefix: currentPrefix,
-        marker: append ? marker : ""
-      })
-      .then(res => {
-        let objects = []
-        if (res.objects) {
-          objects = res.objects.map(object => {
-            return {
-              ...object,
-              name: object.name.replace(currentPrefix, "")
-            }
-          })
-        }
-        if (append) {
-          dispatch(appendList(objects, res.nextmarker, res.istruncated))
-        } else {
-          dispatch(setList(objects, res.nextmarker, res.istruncated))
-          dispatch(setSortBy(""))
-          dispatch(setSortOrder(false))
-        }
-        dispatch(setPrefixWritable(res.writable))
-      })
-      .catch(err => {
-        dispatch(alertActions.set({ type: "danger", message: err.message }))
-        history.push("/login")
-      })
-    } 
+        .ListObjects({
+          bucketName: currentBucket,
+          prefix: currentPrefix,
+          marker: append ? marker : ""
+        })
+        .then(res => {
+          let objects = []
+          if (res.objects) {
+            objects = res.objects.map(object => {
+              return {
+                ...object,
+                name: object.name.replace(currentPrefix, "")
+              }
+            })
+          }
+          if (append) {
+            dispatch(appendList(objects, res.nextmarker, res.istruncated))
+          } else {
+            dispatch(setList(objects, res.nextmarker, res.istruncated))
+            dispatch(setSortBy(""))
+            dispatch(setSortOrder(false))
+          }
+          dispatch(setPrefixWritable(res.writable))
+        })
+        .catch(err => {
+          if (web.LoggedIn()) {
+            dispatch(
+              alertActions.set({
+                type: "danger",
+                message: err.message,
+                autoClear: true
+              })
+            )
+            dispatch(resetList())
+          } else {
+            history.push("/login")
+          }
+        })
+    }
   }
 }
 
 export const sortObjects = sortBy => {
   return function(dispatch, getState) {
-    const { objects } = getState()
+    const {objects} = getState()
     const sortOrder = objects.sortBy == sortBy ? !objects.sortOrder : true
     dispatch(setSortBy(sortBy))
     dispatch(setSortOrder(sortOrder))
@@ -194,30 +203,39 @@ export const shareObject = (object, days, hours, minutes) => {
     const currentPrefix = getCurrentPrefix(getState())
     const objectName = `${currentPrefix}${object}`
     const expiry = days * 24 * 60 * 60 + hours * 60 * 60 + minutes * 60
-    return web
-      .PresignedGet({
-        host: location.host,
-        bucket: currentBucket,
-        object: objectName,
-        expiry
-      })
-      .then(obj => {
-        dispatch(showShareObject(object, obj.url))
-        dispatch(
-          alertActions.set({
-            type: "success",
-            message: `Object shared. Expires in ${days} days ${hours} hours ${minutes} minutes`
-          })
-        )
-      })
-      .catch(err => {
-        dispatch(
-          alertActions.set({
-            type: "danger",
-            message: err.message
-          })
-        )
-      })
+    if (web.LoggedIn()) {
+      return web
+        .PresignedGet({
+          host: location.host,
+          bucket: currentBucket,
+          object: objectName
+        })
+        .then(obj => {
+          dispatch(showShareObject(object, obj.url))
+          dispatch(
+            alertActions.set({
+              type: "success",
+              message: `Object shared. Expires in ${days} days ${hours} hours ${minutes} minutes`
+            })
+          )
+        })
+        .catch(err => {
+          dispatch(
+            alertActions.set({
+              type: "danger",
+              message: err.message
+            })
+          )
+        })
+    } else {
+      dispatch(showShareObject(object, `${location.host}` + '/' + `${currentBucket}` + '/' + encodeURI(objectName)))
+      dispatch(
+        alertActions.set({
+          type: "success",
+          message: `Object shared.`
+        })
+      )
+    }
   }
 }
 
@@ -263,7 +281,7 @@ export const downloadObject = object => {
     } else {
       const url = `${
         window.location.origin
-      }${minioBrowserPrefix}/download/${currentBucket}/${encObjectName}?token=''`
+      }${minioBrowserPrefix}/download/${currentBucket}/${encObjectName}?token=`
       window.location = url
     }
   }
@@ -292,7 +310,7 @@ export const downloadCheckedObjects = () => {
       objects: getCheckedList(state)
     }
     if (!web.LoggedIn()) {
-      const requestUrl = location.origin + "/minio/zip?token=''"
+      const requestUrl = location.origin + "/minio/zip?token="
       downloadZip(requestUrl, req, dispatch)
     } else {
       return web
@@ -303,14 +321,13 @@ export const downloadCheckedObjects = () => {
           }${minioBrowserPrefix}/zip?token=${res.token}`
           downloadZip(requestUrl, req, dispatch)
         })
-        .catch(err =>
-          dispatch(
-            alertActions.set({
-              type: "danger",
-              message: err.message
-            })
-          )
+        .catch(err => dispatch(
+          alertActions.set({
+            type: "danger",
+            message: err.message
+          })
         )
+      )
     }
   }
 }
@@ -333,8 +350,7 @@ const downloadZip = (url, req, dispatch) => {
       var separator = req.prefix.length > 1 ? "-" : ""
 
       anchor.href = blobUrl
-      anchor.download =
-        req.bucketName + separator + req.prefix.slice(0, -1) + ".zip"
+      anchor.download = req.bucketName + separator + req.prefix.slice(0, -1) + ".zip"
 
       anchor.click()
       window.URL.revokeObjectURL(blobUrl)

browser/app/js/objects/reducer.js

@@ -50,6 +50,13 @@ export default (
         marker: action.marker,
         isTruncated: action.isTruncated
       }
+    case actionsObjects.RESET_LIST:
+      return {
+        ...state,
+        list: [],
+        marker: "",
+        isTruncated: false
+      }
     case actionsObjects.APPEND_LIST:
       return {
         ...state,

browser/app/less/inc/list.less

@@ -100,10 +100,24 @@ div.fesl-row {
         }
     }
 
+    .fesl-item-name {
+        a {
+            cursor: default;
+        }
+    }
+
     /*--------------------------
         Icons
     ----------------------------*/
-    &[data-type=folder] { .list-type(#a1d6dd, '\f114'); }
+    &[data-type=folder] {
+        .list-type(#a1d6dd, '\f114');
+
+        .fesl-item-name {
+            a {
+                cursor: pointer;
+            }
+        }
+    }
     &[data-type=pdf] {.list-type(#fa7775, '\f1c1'); }
     &[data-type=zip] { .list-type(#427089, '\f1c6'); }
     &[data-type=audio] { .list-type(#009688, '\f1c7'); }

browser/build.js

@@ -70,9 +70,9 @@ async.waterfall([
       commitId = stdout.replace('\n', '')
       if (commitId.length !== 40) throw new Error('commitId invalid : ' + commitId)
       assetsFileName = 'ui-assets.go';
-      var cmd = 'go-bindata-assetfs -pkg browser -nocompress=true production/...'
+      var cmd = 'go-bindata-assetfs -o bindata_assetfs.go -pkg browser -nocompress=true production/...'
       if (!isProduction) {
-        cmd = 'go-bindata-assetfs -pkg browser -nocompress=true dev/...'
+        cmd = 'go-bindata-assetfs -o bindata_assetfs.go -pkg browser -nocompress=true dev/...'
       }
       console.log('Running', cmd)
       exec(cmd, cb)

buildscripts/checkdeps.sh

@@ -89,11 +89,11 @@ check_minimum_version() {
 
 assert_is_supported_arch() {
     case "${ARCH}" in
-        x86_64 | amd64 | aarch64 | ppc64le | arm* )
+        x86_64 | amd64 | aarch64 | ppc64le | arm* | s390x )
             return
             ;;
         *)
-            echo "Arch '${ARCH}' is not supported. Supported Arch: [x86_64, amd64, aarch64, ppc64le, arm*]"
+            echo "Arch '${ARCH}' is not supported. Supported Arch: [x86_64, amd64, aarch64, ppc64le, arm*, s390x]"
             exit 1
     esac
 }

buildscripts/go-coverage.sh

@@ -4,7 +4,7 @@ set -e
 echo "" > coverage.txt
 
 for d in $(go list ./... | grep -v browser); do
-    go test -coverprofile=profile.out -covermode=atomic "$d"
+    go test -v -coverprofile=profile.out -covermode=atomic "$d"
     if [ -f profile.out ]; then
         cat profile.out >> coverage.txt
         rm profile.out

buildscripts/verify-build.sh

@@ -68,9 +68,41 @@ function start_minio_erasure_sets()
     echo "$minio_pid"
 }
 
+function start_minio_dist_erasure_sets_ipv6()
+{
+    declare -a minio_pids
+    export MINIO_ACCESS_KEY=$ACCESS_KEY
+    export MINIO_SECRET_KEY=$SECRET_KEY
+    "${MINIO[@]}" server --address="[::1]:9000" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9000.log" 2>&1 &
+    minio_pids[0]=$!
+    "${MINIO[@]}" server --address="[::1]:9001" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9001.log" 2>&1 &
+    minio_pids[1]=$!
+    "${MINIO[@]}" server --address="[::1]:9002" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9002.log" 2>&1 &
+    minio_pids[2]=$!
+    "${MINIO[@]}" server --address="[::1]:9003" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9003.log" 2>&1 &
+    minio_pids[3]=$!
+    "${MINIO[@]}" server --address="[::1]:9004" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9004.log" 2>&1 &
+    minio_pids[4]=$!
+    "${MINIO[@]}" server --address="[::1]:9005" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9005.log" 2>&1 &
+    minio_pids[5]=$!
+    "${MINIO[@]}" server --address="[::1]:9006" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9006.log" 2>&1 &
+    minio_pids[6]=$!
+    "${MINIO[@]}" server --address="[::1]:9007" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9007.log" 2>&1 &
+    minio_pids[7]=$!
+    "${MINIO[@]}" server --address="[::1]:9008" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9008.log" 2>&1 &
+    minio_pids[8]=$!
+    "${MINIO[@]}" server --address="[::1]:9009" "http://[::1]:9000${WORK_DIR}/dist-disk-sets1" "http://[::1]:9001${WORK_DIR}/dist-disk-sets2" "http://[::1]:9002${WORK_DIR}/dist-disk-sets3" "http://[::1]:9003${WORK_DIR}/dist-disk-sets4" "http://[::1]:9004${WORK_DIR}/dist-disk-sets5" "http://[::1]:9005${WORK_DIR}/dist-disk-sets6" "http://[::1]:9006${WORK_DIR}/dist-disk-sets7" "http://[::1]:9007${WORK_DIR}/dist-disk-sets8" "http://[::1]:9008${WORK_DIR}/dist-disk-sets9" "http://[::1]:9009${WORK_DIR}/dist-disk-sets10" "http://[::1]:9000${WORK_DIR}/dist-disk-sets11" "http://[::1]:9001${WORK_DIR}/dist-disk-sets12" "http://[::1]:9002${WORK_DIR}/dist-disk-sets13" "http://[::1]:9003${WORK_DIR}/dist-disk-sets14" "http://[::1]:9004${WORK_DIR}/dist-disk-sets15" "http://[::1]:9005${WORK_DIR}/dist-disk-sets16" "http://[::1]:9006${WORK_DIR}/dist-disk-sets17" "http://[::1]:9007${WORK_DIR}/dist-disk-sets18" "http://[::1]:9008${WORK_DIR}/dist-disk-sets19" "http://[::1]:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-v6-9009.log" 2>&1 &
+    minio_pids[9]=$!
+
+    sleep 35
+    echo "${minio_pids[@]}"
+}
+
 function start_minio_dist_erasure_sets()
 {
     declare -a minio_pids
+    export MINIO_ACCESS_KEY=$ACCESS_KEY
+    export MINIO_SECRET_KEY=$SECRET_KEY
     "${MINIO[@]}" server --address=:9000 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9000.log" 2>&1 &
     minio_pids[0]=$!
     "${MINIO[@]}" server --address=:9001 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9001.log" 2>&1 &
@@ -99,6 +131,8 @@ function start_minio_dist_erasure_sets()
 function start_minio_dist_erasure()
 {
     declare -a minio_pids
+    export MINIO_ACCESS_KEY=$ACCESS_KEY
+    export MINIO_SECRET_KEY=$SECRET_KEY
     "${MINIO[@]}" server --address=:9000 "http://127.0.0.1:9000${WORK_DIR}/dist-disk1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk4" >"$WORK_DIR/dist-minio-9000.log" 2>&1 &
     minio_pids[0]=$!
     "${MINIO[@]}" server --address=:9001 "http://127.0.0.1:9000${WORK_DIR}/dist-disk1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk4" >"$WORK_DIR/dist-minio-9001.log" 2>&1 &
@@ -157,6 +191,34 @@ function run_test_erasure_sets() {
     return "$rv"
 }
 
+function run_test_dist_erasure_sets_ipv6()
+{
+    minio_pids=( $(start_minio_dist_erasure_sets_ipv6) )
+
+    export SERVER_ENDPOINT="[::1]:9000"
+
+    (cd "$WORK_DIR" && "$FUNCTIONAL_TESTS")
+    rv=$?
+
+    for pid in "${minio_pids[@]}"; do
+        kill "$pid"
+    done
+    sleep 3
+
+    if [ "$rv" -ne 0 ]; then
+        for i in $(seq 0 9); do
+            echo "server$i log:"
+            cat "$WORK_DIR/dist-minio-v6-900$i.log"
+        done
+    fi
+
+    for i in $(seq 0 9); do
+        rm -f "$WORK_DIR/dist-minio-v6-900$i.log"
+    done
+
+    return "$rv"
+}
+
 function run_test_dist_erasure_sets()
 {
     minio_pids=( $(start_minio_dist_erasure_sets) )
@@ -233,6 +295,7 @@ function run_test_gateway_s3()
 {
     minio_pid="$(start_minio_gateway_s3)"
 
+    export SERVER_ENDPOINT="127.0.0.1:9000"
     export ACCESS_KEY=Q3AM3UQ867SPQQA43P2F
     export SECRET_KEY=zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG
     (cd "$WORK_DIR" && "$FUNCTIONAL_TESTS")
@@ -275,6 +338,7 @@ function __init__()
         exit 1
     fi
 
+    sed -i 's|-sS|-sSg|g' "$FUNCTIONAL_TESTS"
     chmod a+x "$FUNCTIONAL_TESTS"
 }
 
@@ -315,6 +379,13 @@ function main()
         exit 1
     fi
 
+    echo "Testing in Distributed Erasure setup as sets with ipv6"
+    if ! run_test_dist_erasure_sets_ipv6; then
+        echo "FAILED"
+        rm -fr "$WORK_DIR"
+        exit 1
+    fi
+
     echo "Testing in Gateway S3 setup"
     if ! run_test_gateway_s3; then
         echo "FAILED"

cmd/acl-handlers.go

@@ -21,6 +21,7 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/policy"
 )
 
@@ -54,28 +55,30 @@ type accessControlPolicy struct {
 // This operation uses the ACL
 // subresource to return the ACL of a specified bucket.
 func (api objectAPIHandlers) GetBucketACLHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "GetBucketACL")
+	ctx := newContext(r, w, "GetBucketACL")
+
+	defer logger.AuditLog(w, r, "GetBucketACL", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
 	objAPI := api.ObjectAPI()
 	if objAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Allow getBucketACL if policy action is set, since this is a dummy call
 	// we are simply re-purposing the bucketPolicyAction.
 	if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Before proceeding validate if bucket exists.
 	_, err := objAPI.GetBucketInfo(ctx, bucket)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -89,7 +92,7 @@ func (api objectAPIHandlers) GetBucketACLHandler(w http.ResponseWriter, r *http.
 		Permission: "FULL_CONTROL",
 	})
 	if err := xml.NewEncoder(w).Encode(acl); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -101,7 +104,9 @@ func (api objectAPIHandlers) GetBucketACLHandler(w http.ResponseWriter, r *http.
 // This operation uses the ACL
 // subresource to return the ACL of a specified object.
 func (api objectAPIHandlers) GetObjectACLHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "GetObjectACL")
+	ctx := newContext(r, w, "GetObjectACL")
+
+	defer logger.AuditLog(w, r, "GetObjectACL", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
@@ -109,21 +114,21 @@ func (api objectAPIHandlers) GetObjectACLHandler(w http.ResponseWriter, r *http.
 
 	objAPI := api.ObjectAPI()
 	if objAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Allow getObjectACL if policy action is set, since this is a dummy call
 	// we are simply re-purposing the bucketPolicyAction.
 	if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Before proceeding validate if object exists.
-	_, err := objAPI.GetObjectInfo(ctx, bucket, object)
+	_, err := objAPI.GetObjectInfo(ctx, bucket, object, ObjectOptions{})
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -137,7 +142,7 @@ func (api objectAPIHandlers) GetObjectACLHandler(w http.ResponseWriter, r *http.
 		Permission: "FULL_CONTROL",
 	})
 	if err := xml.NewEncoder(w).Encode(acl); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 

cmd/admin-handlers_test.go

@@ -26,8 +26,8 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"net/url"
-	"os"
 	"strings"
+	"sync"
 	"testing"
 	"time"
 
@@ -38,100 +38,194 @@ import (
 
 var (
 	configJSON = []byte(`{
-	"version": "13",
-	"credential": {
-		"accessKey": "minio",
-		"secretKey": "minio123"
+  "version": "33",
+  "credential": {
+    "accessKey": "minio",
+    "secretKey": "minio123"
+  },
+  "region": "us-east-1",
+  "worm": "off",
+  "storageclass": {
+    "standard": "",
+    "rrs": ""
+  },
+  "cache": {
+    "drives": [],
+    "expiry": 90,
+    "maxuse": 80,
+    "exclude": []
+  },
+  "kms": {
+    "vault": {
+      "endpoint": "",
+      "auth": {
+        "type": "",
+        "approle": {
+          "id": "",
+          "secret": ""
+        }
+      },
+      "key-id": {
+        "name": "",
+        "version": 0
+      }
+    }
+  },
+  "notify": {
+    "amqp": {
+      "1": {
+        "enable": false,
+        "url": "",
+        "exchange": "",
+        "routingKey": "",
+        "exchangeType": "",
+        "deliveryMode": 0,
+        "mandatory": false,
+        "immediate": false,
+        "durable": false,
+        "internal": false,
+        "noWait": false,
+        "autoDeleted": false
+      }
+    },
+    "elasticsearch": {
+      "1": {
+        "enable": false,
+        "format": "namespace",
+        "url": "",
+        "index": ""
+      }
+    },
+    "kafka": {
+      "1": {
+        "enable": false,
+        "brokers": null,
+        "topic": "",
+        "tls": {
+          "enable": false,
+          "skipVerify": false,
+          "clientAuth": 0
+        },
+        "sasl": {
+          "enable": false,
+          "username": "",
+          "password": ""
+        }
+      }
+    },
+    "mqtt": {
+      "1": {
+        "enable": false,
+        "broker": "",
+        "topic": "",
+        "qos": 0,
+        "clientId": "",
+        "username": "",
+        "password": "",
+        "reconnectInterval": 0,
+        "keepAliveInterval": 0
+      }
+    },
+    "mysql": {
+      "1": {
+        "enable": false,
+        "format": "namespace",
+        "dsnString": "",
+        "table": "",
+        "host": "",
+        "port": "",
+        "user": "",
+        "password": "",
+        "database": ""
+      }
+    },
+    "nats": {
+      "1": {
+        "enable": false,
+        "address": "",
+        "subject": "",
+        "username": "",
+        "password": "",
+        "token": "",
+        "secure": false,
+        "pingInterval": 0,
+        "streaming": {
+          "enable": false,
+          "clusterID": "",
+          "async": false,
+          "maxPubAcksInflight": 0
+        }
+      }
 	},
-	"region": "us-west-1",
-	"logger": {
-		"console": {
-			"enable": true,
-			"level": "fatal"
-		},
-		"file": {
+    "nsq": {
+      "1": {
+        "enable": false,
+        "nsqdAddress": "",
+        "topic": "",
+        "tls": {
 			"enable": false,
-			"fileName": "",
-			"level": ""
+			"skipVerify": false
 		}
-	},
-	"notify": {
-		"amqp": {
-			"1": {
-				"enable": false,
-				"url": "",
-				"exchange": "",
-				"routingKey": "",
-				"exchangeType": "",
-				"mandatory": false,
-				"immediate": false,
-				"durable": false,
-				"internal": false,
-				"noWait": false,
-				"autoDeleted": false
-			}
-		},
-		"nats": {
-			"1": {
-				"enable": false,
-				"address": "",
-				"subject": "",
-				"username": "",
-				"password": "",
-				"token": "",
-				"secure": false,
-				"pingInterval": 0,
-				"streaming": {
-					"enable": false,
-					"clusterID": "",
-					"clientID": "",
-					"async": false,
-					"maxPubAcksInflight": 0
-				}
-			}
-		},
-		"elasticsearch": {
-			"1": {
-				"enable": false,
-				"url": "",
-				"index": ""
-			}
-		},
-		"redis": {
-			"1": {
-				"enable": false,
-				"address": "",
-				"password": "",
-				"key": ""
-			}
-		},
-		"postgresql": {
-			"1": {
-				"enable": false,
-				"connectionString": "",
-				"table": "",
-				"host": "",
-				"port": "",
-				"user": "",
-				"password": "",
-				"database": ""
-			}
-		},
-		"kafka": {
-			"1": {
-				"enable": false,
-				"brokers": null,
-				"topic": ""
-			}
-		},
-		"webhook": {
-			"1": {
-				"enable": false,
-				"endpoint": ""
-			}
-		}
-	}
-}`)
+      }
+    },
+    "postgresql": {
+      "1": {
+        "enable": false,
+        "format": "namespace",
+        "connectionString": "",
+        "table": "",
+        "host": "",
+        "port": "",
+        "user": "",
+        "password": "",
+        "database": ""
+      }
+    },
+    "redis": {
+      "1": {
+        "enable": false,
+        "format": "namespace",
+        "address": "",
+        "password": "",
+        "key": ""
+      }
+    },
+    "webhook": {
+      "1": {
+        "enable": false,
+        "endpoint": ""
+      }
+    }
+  },
+  "logger": {
+    "console": {
+      "enabled": true
+    },
+    "http": {
+      "1": {
+        "enabled": false,
+        "endpoint": "https://username:password@example.com/api"
+      }
+    }
+  },
+  "compress": {
+    "enabled": false,
+    "extensions":[".txt",".log",".csv",".json"],
+    "mime-types":["text/csv","text/plain","application/json"]
+  },
+  "openid": {
+    "jwks": {
+      "url": ""
+    }
+  },
+  "policy": {
+    "opa": {
+      "url": "",
+      "authToken": ""
+    }
+  }
+}
+`)
 )
 
 // adminXLTestBed - encapsulates subsystems that need to be setup for
@@ -149,17 +243,17 @@ func prepareAdminXLTestBed() (*adminXLTestBed, error) {
 	// reset global variables to start afresh.
 	resetTestGlobals()
 
-	// Initialize minio server config.
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		return nil, err
-	}
 	// Initializing objectLayer for HealFormatHandler.
 	objLayer, xlDirs, xlErr := initTestXLObjLayer()
 	if xlErr != nil {
 		return nil, xlErr
 	}
 
+	// Initialize minio server config.
+	if err := newTestConfig(globalMinioDefaultRegion, objLayer); err != nil {
+		return nil, err
+	}
+
 	// Initialize boot time
 	globalBootTime = UTCNow()
 
@@ -183,20 +277,18 @@ func prepareAdminXLTestBed() (*adminXLTestBed, error) {
 
 	// Setup admin mgmt REST API handlers.
 	adminRouter := mux.NewRouter()
-	registerAdminRouter(adminRouter)
+	registerAdminRouter(adminRouter, true)
 
 	return &adminXLTestBed{
-		configPath: rootPath,
-		xlDirs:     xlDirs,
-		objLayer:   objLayer,
-		router:     adminRouter,
+		xlDirs:   xlDirs,
+		objLayer: objLayer,
+		router:   adminRouter,
 	}, nil
 }
 
 // TearDown - method that resets the test bed for subsequent unit
 // tests to start afresh.
 func (atb *adminXLTestBed) TearDown() {
-	os.RemoveAll(atb.configPath)
 	removeRoots(atb.xlDirs)
 	resetTestGlobals()
 }
@@ -216,8 +308,8 @@ func (atb *adminXLTestBed) GenerateHealTestData(t *testing.T) {
 		for i := 0; i < 10; i++ {
 			objectName := fmt.Sprintf("%s-%d", objName, i)
 			_, err = atb.objLayer.PutObject(context.Background(), bucketName, objectName,
-				mustGetHashReader(t, bytes.NewReader([]byte("hello")),
-					int64(len("hello")), "", ""), nil)
+				mustGetPutObjReader(t, bytes.NewReader([]byte("hello")),
+					int64(len("hello")), "", ""), nil, ObjectOptions{})
 			if err != nil {
 				t.Fatalf("Failed to create %s - %v", objectName,
 					err)
@@ -229,14 +321,14 @@ func (atb *adminXLTestBed) GenerateHealTestData(t *testing.T) {
 	{
 		objName := "mpObject"
 		uploadID, err := atb.objLayer.NewMultipartUpload(context.Background(), bucketName,
-			objName, nil)
+			objName, nil, ObjectOptions{})
 		if err != nil {
 			t.Fatalf("mp new error: %v", err)
 		}
 
 		_, err = atb.objLayer.PutObjectPart(context.Background(), bucketName, objName,
-			uploadID, 3, mustGetHashReader(t, bytes.NewReader(
-				[]byte("hello")), int64(len("hello")), "", ""))
+			uploadID, 3, mustGetPutObjReader(t, bytes.NewReader(
+				[]byte("hello")), int64(len("hello")), "", ""), ObjectOptions{})
 		if err != nil {
 			t.Fatalf("mp put error: %v", err)
 		}
@@ -415,6 +507,8 @@ func getServiceCmdRequest(cmd cmdType, cred auth.Credentials, body []byte) (*htt
 
 	// Set body
 	req.Body = ioutil.NopCloser(bytes.NewReader(body))
+	req.ContentLength = int64(len(body))
+
 	// Set sha-sum header
 	req.Header.Set("X-Amz-Content-Sha256", getSHA256Hash(body))
 
@@ -441,15 +535,21 @@ func testServicesCmdHandler(cmd cmdType, t *testing.T) {
 	globalMinioAddr = "127.0.0.1:9000"
 	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))
 
+	var wg sync.WaitGroup
+
 	// Setting up a go routine to simulate ServerRouter's
 	// handleServiceSignals for stop and restart commands.
 	if cmd == restartCmd {
-		go testServiceSignalReceiver(cmd, t)
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			testServiceSignalReceiver(cmd, t)
+		}()
 	}
 	credentials := globalServerConfig.GetCredential()
 
 	body, err := json.Marshal(madmin.ServiceAction{
-		cmd.toServiceActionValue()})
+		Action: cmd.toServiceActionValue()})
 	if err != nil {
 		t.Fatalf("JSONify error: %v", err)
 	}
@@ -480,6 +580,9 @@ func testServicesCmdHandler(cmd cmdType, t *testing.T) {
 		t.Errorf("Expected to receive %d status code but received %d. Body (%s)",
 			http.StatusOK, rec.Code, string(resp))
 	}
+
+	// Wait until testServiceSignalReceiver() called in a goroutine quits.
+	wg.Wait()
 }
 
 // Test for service status management REST API.
@@ -535,8 +638,14 @@ func TestServiceSetCreds(t *testing.T) {
 		if err != nil {
 			t.Fatalf("JSONify err: %v", err)
 		}
+
+		ebody, err := madmin.EncryptData(credentials.SecretKey, body)
+		if err != nil {
+			t.Fatal(err)
+		}
+
 		// Construct setCreds request
-		req, err := getServiceCmdRequest(setCreds, credentials, body)
+		req, err := getServiceCmdRequest(setCreds, credentials, ebody)
 		if err != nil {
 			t.Fatalf("Failed to build service status request %v", err)
 		}
@@ -567,193 +676,6 @@ func TestServiceSetCreds(t *testing.T) {
 	}
 }
 
-// mkLockQueryVal - helper function to build lock query param.
-func mkLockQueryVal(bucket, prefix, durationStr string) url.Values {
-	qVal := url.Values{}
-	qVal.Set(string(mgmtBucket), bucket)
-	qVal.Set(string(mgmtPrefix), prefix)
-	qVal.Set(string(mgmtLockOlderThan), durationStr)
-	return qVal
-}
-
-// Test for locks list management REST API.
-func TestListLocksHandler(t *testing.T) {
-	adminTestBed, err := prepareAdminXLTestBed()
-	if err != nil {
-		t.Fatal("Failed to initialize a single node XL backend for admin handler tests.")
-	}
-	defer adminTestBed.TearDown()
-
-	// Initialize admin peers to make admin RPC calls.
-	globalMinioAddr = "127.0.0.1:9000"
-	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))
-
-	testCases := []struct {
-		bucket         string
-		prefix         string
-		duration       string
-		expectedStatus int
-	}{
-		// Test 1 - valid testcase
-		{
-			bucket:         "mybucket",
-			prefix:         "myobject",
-			duration:       "1s",
-			expectedStatus: http.StatusOK,
-		},
-		// Test 2 - invalid duration
-		{
-			bucket:         "mybucket",
-			prefix:         "myprefix",
-			duration:       "invalidDuration",
-			expectedStatus: http.StatusBadRequest,
-		},
-		// Test 3 - invalid bucket name
-		{
-			bucket:         `invalid\\Bucket`,
-			prefix:         "myprefix",
-			duration:       "1h",
-			expectedStatus: http.StatusBadRequest,
-		},
-		// Test 4 - invalid prefix
-		{
-			bucket:         "mybucket",
-			prefix:         `invalid\\Prefix`,
-			duration:       "1h",
-			expectedStatus: http.StatusBadRequest,
-		},
-	}
-
-	for i, test := range testCases {
-		queryVal := mkLockQueryVal(test.bucket, test.prefix, test.duration)
-		req, err := newTestRequest("GET", "/minio/admin/v1/locks?"+queryVal.Encode(), 0, nil)
-		if err != nil {
-			t.Fatalf("Test %d - Failed to construct list locks request - %v", i+1, err)
-		}
-
-		cred := globalServerConfig.GetCredential()
-		err = signRequestV4(req, cred.AccessKey, cred.SecretKey)
-		if err != nil {
-			t.Fatalf("Test %d - Failed to sign list locks request - %v", i+1, err)
-		}
-		rec := httptest.NewRecorder()
-		adminTestBed.router.ServeHTTP(rec, req)
-		if test.expectedStatus != rec.Code {
-			t.Errorf("Test %d - Expected HTTP status code %d but received %d", i+1, test.expectedStatus, rec.Code)
-		}
-	}
-}
-
-// Test for locks clear management REST API.
-func TestClearLocksHandler(t *testing.T) {
-	adminTestBed, err := prepareAdminXLTestBed()
-	if err != nil {
-		t.Fatal("Failed to initialize a single node XL backend for admin handler tests.")
-	}
-	defer adminTestBed.TearDown()
-
-	// Initialize admin peers to make admin RPC calls.
-	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))
-
-	testCases := []struct {
-		bucket         string
-		prefix         string
-		duration       string
-		expectedStatus int
-	}{
-		// Test 1 - valid testcase
-		{
-			bucket:         "mybucket",
-			prefix:         "myobject",
-			duration:       "1s",
-			expectedStatus: http.StatusOK,
-		},
-		// Test 2 - invalid duration
-		{
-			bucket:         "mybucket",
-			prefix:         "myprefix",
-			duration:       "invalidDuration",
-			expectedStatus: http.StatusBadRequest,
-		},
-		// Test 3 - invalid bucket name
-		{
-			bucket:         `invalid\\Bucket`,
-			prefix:         "myprefix",
-			duration:       "1h",
-			expectedStatus: http.StatusBadRequest,
-		},
-		// Test 4 - invalid prefix
-		{
-			bucket:         "mybucket",
-			prefix:         `invalid\\Prefix`,
-			duration:       "1h",
-			expectedStatus: http.StatusBadRequest,
-		},
-	}
-
-	for i, test := range testCases {
-		queryVal := mkLockQueryVal(test.bucket, test.prefix, test.duration)
-		req, err := newTestRequest("DELETE", "/minio/admin/v1/locks?"+queryVal.Encode(), 0, nil)
-		if err != nil {
-			t.Fatalf("Test %d - Failed to construct clear locks request - %v", i+1, err)
-		}
-
-		cred := globalServerConfig.GetCredential()
-		err = signRequestV4(req, cred.AccessKey, cred.SecretKey)
-		if err != nil {
-			t.Fatalf("Test %d - Failed to sign clear locks request - %v", i+1, err)
-		}
-		rec := httptest.NewRecorder()
-		adminTestBed.router.ServeHTTP(rec, req)
-		if test.expectedStatus != rec.Code {
-			t.Errorf("Test %d - Expected HTTP status code %d but received %d", i+1, test.expectedStatus, rec.Code)
-		}
-	}
-}
-
-// Test for lock query param validation helper function.
-func TestValidateLockQueryParams(t *testing.T) {
-	// reset globals.
-	// this is to make sure that the tests are not affected by modified globals.
-	resetTestGlobals()
-	// initialize NSLock.
-	initNSLock(false)
-	// Sample query values for test cases.
-	allValidVal := mkLockQueryVal("bucket", "prefix", "1s")
-	invalidBucketVal := mkLockQueryVal(`invalid\\Bucket`, "prefix", "1s")
-	invalidPrefixVal := mkLockQueryVal("bucket", `invalid\\Prefix`, "1s")
-	invalidOlderThanVal := mkLockQueryVal("bucket", "prefix", "invalidDuration")
-
-	testCases := []struct {
-		qVals  url.Values
-		apiErr APIErrorCode
-	}{
-		{
-			qVals:  invalidBucketVal,
-			apiErr: ErrInvalidBucketName,
-		},
-		{
-			qVals:  invalidPrefixVal,
-			apiErr: ErrInvalidObjectName,
-		},
-		{
-			qVals:  invalidOlderThanVal,
-			apiErr: ErrInvalidDuration,
-		},
-		{
-			qVals:  allValidVal,
-			apiErr: ErrNone,
-		},
-	}
-
-	for i, test := range testCases {
-		_, _, _, apiErr := validateLockQueryParams(test.qVals)
-		if apiErr != test.apiErr {
-			t.Errorf("Test %d - Expected error %v but received %v", i+1, test.apiErr, apiErr)
-		}
-	}
-}
-
 // buildAdminRequest - helper function to build an admin API request.
 func buildAdminRequest(queryVal url.Values, method, path string,
 	contentLength int64, bodySeeker io.ReadSeeker) (*http.Request, error) {
@@ -815,16 +737,18 @@ func TestSetConfigHandler(t *testing.T) {
 	globalMinioAddr = "127.0.0.1:9000"
 	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))
 
-	// SetConfigHandler restarts minio setup - need to start a
-	// signal receiver to receive on globalServiceSignalCh.
-	go testServiceSignalReceiver(restartCmd, t)
-
 	// Prepare query params for set-config mgmt REST API.
 	queryVal := url.Values{}
 	queryVal.Set("config", "")
 
+	password := globalServerConfig.GetCredential().SecretKey
+	econfigJSON, err := madmin.EncryptData(password, configJSON)
+	if err != nil {
+		t.Fatal(err)
+	}
+
 	req, err := buildAdminRequest(queryVal, http.MethodPut, "/config",
-		int64(len(configJSON)), bytes.NewReader(configJSON))
+		int64(len(econfigJSON)), bytes.NewReader(econfigJSON))
 	if err != nil {
 		t.Fatalf("Failed to construct set-config object request - %v", err)
 	}
@@ -832,23 +756,13 @@ func TestSetConfigHandler(t *testing.T) {
 	rec := httptest.NewRecorder()
 	adminTestBed.router.ServeHTTP(rec, req)
 	if rec.Code != http.StatusOK {
-		t.Errorf("Expected to succeed but failed with %d", rec.Code)
-	}
-
-	result := setConfigResult{}
-	err = json.NewDecoder(rec.Body).Decode(&result)
-	if err != nil {
-		t.Fatalf("Failed to decode set config result json %v", err)
-	}
-
-	if !result.Status {
-		t.Error("Expected set-config to succeed, but failed")
+		t.Errorf("Expected to succeed but failed with %d, body: %s", rec.Code, rec.Body)
 	}
 
 	// Check that a very large config file returns an error.
 	{
 		// Make a large enough config string
-		invalidCfg := []byte(strings.Repeat("A", maxConfigJSONSize+1))
+		invalidCfg := []byte(strings.Repeat("A", maxEConfigJSONSize+1))
 		req, err := buildAdminRequest(queryVal, http.MethodPut, "/config",
 			int64(len(invalidCfg)), bytes.NewReader(invalidCfg))
 		if err != nil {
@@ -867,7 +781,7 @@ func TestSetConfigHandler(t *testing.T) {
 	// Check that a config with duplicate keys in an object return
 	// error.
 	{
-		invalidCfg := append(configJSON[:len(configJSON)-1], []byte(`, "version": "15"}`)...)
+		invalidCfg := append(econfigJSON[:len(econfigJSON)-1], []byte(`, "version": "15"}`)...)
 		req, err := buildAdminRequest(queryVal, http.MethodPut, "/config",
 			int64(len(invalidCfg)), bytes.NewReader(invalidCfg))
 		if err != nil {
@@ -878,7 +792,7 @@ func TestSetConfigHandler(t *testing.T) {
 		adminTestBed.router.ServeHTTP(rec, req)
 		respBody := string(rec.Body.Bytes())
 		if rec.Code != http.StatusBadRequest ||
-			!strings.Contains(respBody, "JSON configuration provided has objects with duplicate keys") {
+			!strings.Contains(respBody, "JSON configuration provided is of incorrect format") {
 			t.Errorf("Got unexpected response code or body %d - %s", rec.Code, respBody)
 		}
 	}
@@ -952,12 +866,12 @@ func TestToAdminAPIErr(t *testing.T) {
 		// 3. Non-admin API specific error.
 		{
 			err:            errDiskNotFound,
-			expectedAPIErr: toAPIErrorCode(errDiskNotFound),
+			expectedAPIErr: toAPIErrorCode(context.Background(), errDiskNotFound),
 		},
 	}
 
 	for i, test := range testCases {
-		actualErr := toAdminAPIErrCode(test.err)
+		actualErr := toAdminAPIErrCode(context.Background(), test.err)
 		if actualErr != test.expectedAPIErr {
 			t.Errorf("Test %d: Expected %v but received %v",
 				i+1, test.expectedAPIErr, actualErr)
@@ -965,81 +879,6 @@ func TestToAdminAPIErr(t *testing.T) {
 	}
 }
 
-func TestWriteSetConfigResponse(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer os.RemoveAll(rootPath)
-	testCases := []struct {
-		status bool
-		errs   []error
-	}{
-		// 1. all nodes returned success.
-		{
-			status: true,
-			errs:   []error{nil, nil, nil, nil},
-		},
-		// 2. some nodes returned errors.
-		{
-			status: false,
-			errs:   []error{errDiskNotFound, nil, errDiskAccessDenied, errFaultyDisk},
-		},
-	}
-
-	testPeers := []adminPeer{
-		{
-			addr: "localhost:9001",
-		},
-		{
-			addr: "localhost:9002",
-		},
-		{
-			addr: "localhost:9003",
-		},
-		{
-			addr: "localhost:9004",
-		},
-	}
-
-	testURL, err := url.Parse("http://dummy.com")
-	if err != nil {
-		t.Fatalf("Failed to parse a place-holder url")
-	}
-
-	var actualResult setConfigResult
-	for i, test := range testCases {
-		rec := httptest.NewRecorder()
-		writeSetConfigResponse(rec, testPeers, test.errs, test.status, testURL)
-		resp := rec.Result()
-		jsonBytes, err := ioutil.ReadAll(resp.Body)
-		if err != nil {
-			t.Fatalf("Test %d: Failed to read response %v", i+1, err)
-		}
-
-		err = json.Unmarshal(jsonBytes, &actualResult)
-		if err != nil {
-			t.Fatalf("Test %d: Failed to unmarshal json %v", i+1, err)
-		}
-		if actualResult.Status != test.status {
-			t.Errorf("Test %d: Expected status %v but received %v", i+1, test.status, actualResult.Status)
-		}
-		for p, res := range actualResult.NodeResults {
-			if res.Name != testPeers[p].addr {
-				t.Errorf("Test %d: Expected node name %s but received %s", i+1, testPeers[p].addr, res.Name)
-			}
-			expectedErrMsg := fmt.Sprintf("%v", test.errs[p])
-			if res.ErrMsg != expectedErrMsg {
-				t.Errorf("Test %d: Expected error %s but received %s", i+1, expectedErrMsg, res.ErrMsg)
-			}
-			expectedErrSet := test.errs[p] != nil
-			if res.ErrSet != expectedErrSet {
-				t.Errorf("Test %d: Expected ErrSet %v but received %v", i+1, expectedErrSet, res.ErrSet)
-			}
-		}
-	}
-}
-
 func mkHealStartReq(t *testing.T, bucket, prefix string,
 	opts madmin.HealOpts) *http.Request {
 

cmd/admin-heal-ops.go

@@ -20,12 +20,15 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"net/http"
+	"runtime"
 	"strings"
 	"sync"
 	"time"
 
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/madmin"
+	"github.com/minio/minio/pkg/sync/errgroup"
 )
 
 // healStatusSummary - overall short summary of a healing sequence
@@ -59,8 +62,8 @@ var (
 	errHealPushStopNDiscard = fmt.Errorf("heal push stopped due to heal stop signal")
 	errHealStopSignalled    = fmt.Errorf("heal stop signaled")
 
-	errFnHealFromAPIErr = func(err error) error {
-		errCode := toAPIErrorCode(err)
+	errFnHealFromAPIErr = func(ctx context.Context, err error) error {
+		errCode := toAPIErrorCode(ctx, err)
 		apiErr := getAPIError(errCode)
 		return fmt.Errorf("Heal internal error: %s: %s",
 			apiErr.Code, apiErr.Description)
@@ -110,6 +113,32 @@ func initAllHealState(isErasureMode bool) {
 	globalAllHealState = allHealState{
 		healSeqMap: make(map[string]*healSequence),
 	}
+
+	go globalAllHealState.periodicHealSeqsClean()
+}
+
+func (ahs *allHealState) periodicHealSeqsClean() {
+	// Launch clean-up routine to remove this heal sequence (after
+	// it ends) from the global state after timeout has elapsed.
+	ticker := time.NewTicker(time.Minute * 5)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+			now := UTCNow()
+			ahs.Lock()
+			for path, h := range ahs.healSeqMap {
+				if h.hasEnded() && h.endTime.Add(keepHealSeqStateDuration).Before(now) {
+					delete(ahs.healSeqMap, path)
+				}
+			}
+			ahs.Unlock()
+		case <-globalServiceDoneCh:
+			// server could be restarting - need
+			// to exit immediately
+			return
+		}
+	}
 }
 
 // getHealSequence - Retrieve a heal sequence by path. The second
@@ -121,6 +150,35 @@ func (ahs *allHealState) getHealSequence(path string) (h *healSequence, exists b
 	return h, exists
 }
 
+func (ahs *allHealState) stopHealSequence(path string) ([]byte, APIErrorCode) {
+	var hsp madmin.HealStopSuccess
+	he, exists := ahs.getHealSequence(path)
+	if !exists {
+		hsp = madmin.HealStopSuccess{
+			ClientToken: "invalid",
+			StartTime:   UTCNow(),
+		}
+	} else {
+		hsp = madmin.HealStopSuccess{
+			ClientToken:   he.clientToken,
+			ClientAddress: he.clientAddress,
+			StartTime:     he.startTime,
+		}
+
+		he.stop()
+		for !he.hasEnded() {
+			time.Sleep(1 * time.Second)
+		}
+		ahs.Lock()
+		defer ahs.Unlock()
+		// Heal sequence explicitly stopped, remove it.
+		delete(ahs.healSeqMap, path)
+	}
+
+	b, err := json.Marshal(&hsp)
+	return b, toAdminAPIErrCode(context.Background(), err)
+}
+
 // LaunchNewHealSequence - launches a background routine that performs
 // healing according to the healSequence argument. For each heal
 // sequence, state is stored in the `globalAllHealState`, which is a
@@ -141,20 +199,20 @@ func (ahs *allHealState) LaunchNewHealSequence(h *healSequence) (
 			existsAndLive = true
 		}
 	}
+
 	if existsAndLive {
 		// A heal sequence exists on the given path.
 		if h.forceStarted {
-			// stop the running heal sequence - wait for
-			// it to finish.
+			// stop the running heal sequence - wait for it to finish.
 			he.stop()
 			for !he.hasEnded() {
-				time.Sleep(10 * time.Second)
+				time.Sleep(1 * time.Second)
 			}
 		} else {
 			errMsg = "Heal is already running on the given path " +
 				"(use force-start option to stop and start afresh). " +
-				fmt.Sprintf("The heal was started by IP %s at %s",
-					h.clientAddress, h.startTime)
+				fmt.Sprintf("The heal was started by IP %s at %s, token is %s",
+					h.clientAddress, h.startTime.Format(http.TimeFormat), h.clientToken)
 
 			return nil, ErrHealAlreadyRunning, errMsg
 		}
@@ -181,48 +239,13 @@ func (ahs *allHealState) LaunchNewHealSequence(h *healSequence) (
 	// Launch top-level background heal go-routine
 	go h.healSequenceStart()
 
-	// Launch clean-up routine to remove this heal sequence (after
-	// it ends) from the global state after timeout has elapsed.
-	go func() {
-		var keepStateTimeout <-chan time.Time
-		ticker := time.NewTicker(time.Minute)
-		defer ticker.Stop()
-		everyMinute := ticker.C
-		for {
-			select {
-			// Check every minute if heal sequence has ended.
-			case <-everyMinute:
-				if h.hasEnded() {
-					keepStateTimeout = time.After(keepHealSeqStateDuration)
-					everyMinute = nil
-				}
-
-			// This case does not fire until the heal
-			// sequence completes.
-			case <-keepStateTimeout:
-				// Heal sequence has ended, keep
-				// results state duration has elapsed,
-				// so purge state.
-				ahs.Lock()
-				defer ahs.Unlock()
-				delete(ahs.healSeqMap, h.path)
-				return
-
-			case <-globalServiceDoneCh:
-				// server could be restarting - need
-				// to exit immediately
-				return
-			}
-		}
-	}()
-
 	b, err := json.Marshal(madmin.HealStartSuccess{
 		ClientToken:   h.clientToken,
 		ClientAddress: h.clientAddress,
 		StartTime:     h.startTime,
 	})
 	if err != nil {
-		logger.LogIf(context.Background(), err)
+		logger.LogIf(h.ctx, err)
 		return nil, ErrInternalError, ""
 	}
 	return b, ErrNone, ""
@@ -270,7 +293,7 @@ func (ahs *allHealState) PopHealStatusJSON(path string,
 
 	jbytes, err := json.Marshal(h.currentStatus)
 	if err != nil {
-		logger.LogIf(context.Background(), err)
+		logger.LogIf(h.ctx, err)
 		return nil, ErrInternalError
 	}
 
@@ -283,12 +306,15 @@ type healSequence struct {
 	// bucket, and prefix on which heal seq. was initiated
 	bucket, objPrefix string
 
-	// path is just bucket + "/" + objPrefix
+	// path is just pathJoin(bucket, objPrefix)
 	path string
 
 	// time at which heal sequence was started
 	startTime time.Time
 
+	// time at which heal sequence has ended
+	endTime time.Time
+
 	// Heal client info
 	clientToken, clientAddress string
 
@@ -328,7 +354,7 @@ func newHealSequence(bucket, objPrefix, clientAddr string,
 	return &healSequence{
 		bucket:        bucket,
 		objPrefix:     objPrefix,
-		path:          bucket + "/" + objPrefix,
+		path:          pathJoin(bucket, objPrefix),
 		startTime:     UTCNow(),
 		clientToken:   mustGetUUID(),
 		clientAddress: clientAddr,
@@ -383,7 +409,6 @@ func (h *healSequence) stop() {
 // sequence automatically resumes. The return value indicates if the
 // operation succeeded.
 func (h *healSequence) pushHealResultItem(r madmin.HealResultItem) error {
-
 	// start a timer to keep an upper time limit to find an empty
 	// slot to add the given heal result - if no slot is found it
 	// means that the server is holding the maximum amount of
@@ -467,6 +492,7 @@ func (h *healSequence) healSequenceStart() {
 
 	select {
 	case err, ok := <-h.traverseAndHealDoneCh:
+		h.endTime = UTCNow()
 		h.currentStatus.updateLock.Lock()
 		defer h.currentStatus.updateLock.Unlock()
 		// Heal traversal is complete.
@@ -480,6 +506,7 @@ func (h *healSequence) healSequenceStart() {
 		}
 
 	case <-h.stopSignalCh:
+		h.endTime = UTCNow()
 		h.currentStatus.updateLock.Lock()
 		h.currentStatus.Summary = healStoppedStatus
 		h.currentStatus.FailureDetail = errHealStopSignalled.Error()
@@ -519,6 +546,9 @@ func (h *healSequence) traverseAndHeal() {
 	// Start with format healing
 	checkErr(h.healDiskFormat)
 
+	// Start healing the config.
+	checkErr(h.healConfig)
+
 	// Heal buckets and objects
 	checkErr(h.healBuckets)
 
@@ -529,9 +559,72 @@ func (h *healSequence) traverseAndHeal() {
 	close(h.traverseAndHealDoneCh)
 }
 
+// healConfig - heals config.json, retrun value indicates if a failure occurred.
+func (h *healSequence) healConfig() error {
+	// Get current object layer instance.
+	objectAPI := newObjectLayerFn()
+	if objectAPI == nil {
+		return errServerNotInitialized
+	}
+
+	// NOTE: Healing on configs is run regardless
+	// of any bucket being selected, this is to ensure that
+	// configs are always uptodate and correct.
+	marker := ""
+	isTruncated := true
+	for isTruncated {
+		if globalHTTPServer != nil {
+			// Wait at max 1 minute for an inprogress request
+			// before proceeding to heal
+			waitCount := 60
+			// Any requests in progress, delay the heal.
+			for globalHTTPServer.GetRequestCount() > 2 && waitCount > 0 {
+				waitCount--
+				time.Sleep(1 * time.Second)
+			}
+		}
+
+		// Lists all objects under `config` prefix.
+		objectInfos, err := objectAPI.ListObjectsHeal(h.ctx, minioMetaBucket, minioConfigPrefix,
+			marker, "", 1000)
+		if err != nil {
+			return errFnHealFromAPIErr(h.ctx, err)
+		}
+
+		for index := range objectInfos.Objects {
+			if h.isQuitting() {
+				return errHealStopSignalled
+			}
+			o := objectInfos.Objects[index]
+			res, herr := objectAPI.HealObject(h.ctx, o.Bucket, o.Name, h.settings.DryRun)
+			// Object might have been deleted, by the time heal
+			// was attempted we ignore this file an move on.
+			if isErrObjectNotFound(herr) {
+				continue
+			}
+			if herr != nil {
+				return herr
+			}
+			res.Type = madmin.HealItemBucketMetadata
+			if err = h.pushHealResultItem(res); err != nil {
+				return err
+			}
+		}
+
+		isTruncated = objectInfos.IsTruncated
+		marker = objectInfos.NextMarker
+	}
+
+	return nil
+}
+
 // healDiskFormat - heals format.json, return value indicates if a
 // failure error occurred.
 func (h *healSequence) healDiskFormat() error {
+	if h.isQuitting() {
+		return errHealStopSignalled
+	}
+
 	// Get current object layer instance.
 	objectAPI := newObjectLayerFn()
 	if objectAPI == nil {
@@ -542,13 +635,18 @@ func (h *healSequence) healDiskFormat() error {
 	// return any error, ignore error returned when disks have
 	// already healed.
 	if err != nil && err != errNoHealRequired {
-		return errFnHealFromAPIErr(err)
+		return errFnHealFromAPIErr(h.ctx, err)
 	}
 
 	// Healing succeeded notify the peers to reload format and re-initialize disks.
 	// We will not notify peers only if healing succeeded.
 	if err == nil {
-		peersReInitFormat(globalAdminPeers, h.settings.DryRun)
+		for host, rerr := range globalNotificationSys.ReloadFormat(h.settings.DryRun) {
+			if rerr != nil {
+				logger.GetReqInfo(h.ctx).SetTags("peerAddress", host.String())
+				logger.LogIf(h.ctx, rerr)
+			}
+		}
 	}
 
 	// Push format heal result
@@ -557,6 +655,10 @@ func (h *healSequence) healDiskFormat() error {
 
 // healBuckets - check for all buckets heal or just particular bucket.
 func (h *healSequence) healBuckets() error {
+	if h.isQuitting() {
+		return errHealStopSignalled
+	}
+
 	// 1. If a bucket was specified, heal only the bucket.
 	if h.bucket != "" {
 		return h.healBucket(h.bucket)
@@ -570,7 +672,7 @@ func (h *healSequence) healBuckets() error {
 
 	buckets, err := objectAPI.ListBucketsHeal(h.ctx)
 	if err != nil {
-		return errFnHealFromAPIErr(err)
+		return errFnHealFromAPIErr(h.ctx, err)
 	}
 
 	for _, bucket := range buckets {
@@ -584,10 +686,6 @@ func (h *healSequence) healBuckets() error {
 
 // healBucket - traverses and heals given bucket
 func (h *healSequence) healBucket(bucket string) error {
-	if h.isQuitting() {
-		return errHealStopSignalled
-	}
-
 	// Get current object layer instance.
 	objectAPI := newObjectLayerFn()
 	if objectAPI == nil {
@@ -610,10 +708,9 @@ func (h *healSequence) healBucket(bucket string) error {
 		if h.objPrefix != "" {
 			// Check if an object named as the objPrefix exists,
 			// and if so heal it.
-			_, err = objectAPI.GetObjectInfo(h.ctx, bucket, h.objPrefix)
+			_, err = objectAPI.GetObjectInfo(h.ctx, bucket, h.objPrefix, ObjectOptions{})
 			if err == nil {
-				err = h.healObject(bucket, h.objPrefix)
-				if err != nil {
+				if err = h.healObject(bucket, h.objPrefix); err != nil {
 					return err
 				}
 			}
@@ -622,17 +719,40 @@ func (h *healSequence) healBucket(bucket string) error {
 		return nil
 	}
 
+	entries := runtime.NumCPU() * globalEndpoints.Nodes()
+
 	marker := ""
 	isTruncated := true
 	for isTruncated {
-		objectInfos, err := objectAPI.ListObjectsHeal(h.ctx, bucket,
-			h.objPrefix, marker, "", 1000)
-		if err != nil {
-			return errFnHealFromAPIErr(err)
+		if globalHTTPServer != nil {
+			// Wait at max 1 minute for an inprogress request
+			// before proceeding to heal
+			waitCount := 60
+			// Any requests in progress, delay the heal.
+			for globalHTTPServer.GetRequestCount() > 2 && waitCount > 0 {
+				waitCount--
+				time.Sleep(1 * time.Second)
+			}
 		}
 
-		for _, o := range objectInfos.Objects {
-			if err := h.healObject(o.Bucket, o.Name); err != nil {
+		// Heal numCPU * nodes objects at a time.
+		objectInfos, err := objectAPI.ListObjectsHeal(h.ctx, bucket,
+			h.objPrefix, marker, "", entries)
+		if err != nil {
+			return errFnHealFromAPIErr(h.ctx, err)
+		}
+
+		g := errgroup.WithNErrs(len(objectInfos.Objects))
+		for index := range objectInfos.Objects {
+			index := index
+			g.Go(func() error {
+				o := objectInfos.Objects[index]
+				return h.healObject(o.Bucket, o.Name)
+			}, index)
+		}
+
+		for _, err := range g.Wait() {
+			if err != nil {
 				return err
 			}
 		}
@@ -656,6 +776,9 @@ func (h *healSequence) healObject(bucket, object string) error {
 	}
 
 	hri, err := objectAPI.HealObject(h.ctx, bucket, object, h.settings.DryRun)
+	if isErrObjectNotFound(err) {
+		return nil
+	}
 	if err != nil {
 		hri.Detail = err.Error()
 	}

cmd/admin-router.go

@@ -31,7 +31,7 @@ type adminAPIHandlers struct {
 }
 
 // registerAdminRouter - Add handler functions for each service REST API routes.
-func registerAdminRouter(router *mux.Router) {
+func registerAdminRouter(router *mux.Router, enableIAM bool) {
 
 	adminAPI := adminAPIHandlers{}
 	// Admin router
@@ -53,26 +53,60 @@ func registerAdminRouter(router *mux.Router) {
 	// Info operations
 	adminV1Router.Methods(http.MethodGet).Path("/info").HandlerFunc(httpTraceAll(adminAPI.ServerInfoHandler))
 
-	/// Lock operations
+	if globalIsDistXL || globalIsXL {
+		/// Heal operations
 
-	// List Locks
-	adminV1Router.Methods(http.MethodGet).Path("/locks").HandlerFunc(httpTraceAll(adminAPI.ListLocksHandler))
-	// Clear locks
-	adminV1Router.Methods(http.MethodDelete).Path("/locks").HandlerFunc(httpTraceAll(adminAPI.ClearLocksHandler))
+		// Heal processing endpoint.
+		adminV1Router.Methods(http.MethodPost).Path("/heal/").HandlerFunc(httpTraceAll(adminAPI.HealHandler))
+		adminV1Router.Methods(http.MethodPost).Path("/heal/{bucket}").HandlerFunc(httpTraceAll(adminAPI.HealHandler))
+		adminV1Router.Methods(http.MethodPost).Path("/heal/{bucket}/{prefix:.*}").HandlerFunc(httpTraceAll(adminAPI.HealHandler))
+	}
 
-	/// Heal operations
-
-	// Heal processing endpoint.
-	adminV1Router.Methods(http.MethodPost).Path("/heal/").HandlerFunc(httpTraceAll(adminAPI.HealHandler))
-	adminV1Router.Methods(http.MethodPost).Path("/heal/{bucket}").HandlerFunc(httpTraceAll(adminAPI.HealHandler))
-	adminV1Router.Methods(http.MethodPost).Path("/heal/{bucket}/{prefix:.*}").HandlerFunc(httpTraceAll(adminAPI.HealHandler))
+	// Profiling operations
+	adminV1Router.Methods(http.MethodPost).Path("/profiling/start").HandlerFunc(httpTraceAll(adminAPI.StartProfilingHandler)).
+		Queries("profilerType", "{profilerType:.*}")
+	adminV1Router.Methods(http.MethodGet).Path("/profiling/download").HandlerFunc(httpTraceAll(adminAPI.DownloadProfilingHandler))
 
 	/// Config operations
 
-	// Update credentials
-	adminV1Router.Methods(http.MethodPut).Path("/config/credential").HandlerFunc(httpTraceAll(adminAPI.UpdateCredentialsHandler))
-	// Get config
-	adminV1Router.Methods(http.MethodGet).Path("/config").HandlerFunc(httpTraceAll(adminAPI.GetConfigHandler))
-	// Set config
-	adminV1Router.Methods(http.MethodPut).Path("/config").HandlerFunc(httpTraceAll(adminAPI.SetConfigHandler))
+	if enableIAM {
+		// Update credentials
+		adminV1Router.Methods(http.MethodPut).Path("/config/credential").HandlerFunc(httpTraceHdrs(adminAPI.UpdateAdminCredentialsHandler))
+		// Get config
+		adminV1Router.Methods(http.MethodGet).Path("/config").HandlerFunc(httpTraceHdrs(adminAPI.GetConfigHandler))
+		// Set config
+		adminV1Router.Methods(http.MethodPut).Path("/config").HandlerFunc(httpTraceHdrs(adminAPI.SetConfigHandler))
+
+		// Get config keys/values
+		adminV1Router.Methods(http.MethodGet).Path("/config-keys").HandlerFunc(httpTraceHdrs(adminAPI.GetConfigKeysHandler))
+		// Set config keys/values
+		adminV1Router.Methods(http.MethodPut).Path("/config-keys").HandlerFunc(httpTraceHdrs(adminAPI.SetConfigKeysHandler))
+
+		// -- IAM APIs --
+
+		// Add policy IAM
+		adminV1Router.Methods(http.MethodPut).Path("/add-canned-policy").HandlerFunc(httpTraceHdrs(adminAPI.AddCannedPolicy)).Queries("name", "{name:.*}")
+
+		// Add user IAM
+		adminV1Router.Methods(http.MethodPut).Path("/add-user").HandlerFunc(httpTraceHdrs(adminAPI.AddUser)).Queries("accessKey", "{accessKey:.*}")
+		adminV1Router.Methods(http.MethodPut).Path("/set-user-policy").HandlerFunc(httpTraceHdrs(adminAPI.SetUserPolicy)).
+			Queries("accessKey", "{accessKey:.*}").Queries("name", "{name:.*}")
+		adminV1Router.Methods(http.MethodPut).Path("/set-user-status").HandlerFunc(httpTraceHdrs(adminAPI.SetUserStatus)).
+			Queries("accessKey", "{accessKey:.*}").Queries("status", "{status:.*}")
+
+		// Remove policy IAM
+		adminV1Router.Methods(http.MethodDelete).Path("/remove-canned-policy").HandlerFunc(httpTraceHdrs(adminAPI.RemoveCannedPolicy)).Queries("name", "{name:.*}")
+
+		// Remove user IAM
+		adminV1Router.Methods(http.MethodDelete).Path("/remove-user").HandlerFunc(httpTraceHdrs(adminAPI.RemoveUser)).Queries("accessKey", "{accessKey:.*}")
+
+		// List users
+		adminV1Router.Methods(http.MethodGet).Path("/list-users").HandlerFunc(httpTraceHdrs(adminAPI.ListUsers))
+
+		// List policies
+		adminV1Router.Methods(http.MethodGet).Path("/list-canned-policies").HandlerFunc(httpTraceHdrs(adminAPI.ListCannedPolicies))
+	}
+
+	// If none of the routes match, return error.
+	adminV1Router.NotFoundHandler = http.HandlerFunc(httpTraceHdrs(notFoundHandlerJSON))
 }

cmd/admin-rpc-client.go

@@ -19,7 +19,6 @@ package cmd
 import (
 	"context"
 	"crypto/tls"
-	"encoding/json"
 	"fmt"
 	"net"
 	"sort"
@@ -46,65 +45,28 @@ func (rpcClient *AdminRPCClient) SignalService(signal serviceSignal) (err error)
 	return rpcClient.Call(adminServiceName+".SignalService", &args, &reply)
 }
 
-// ReInitFormat - re-initialize disk format, remotely.
-func (rpcClient *AdminRPCClient) ReInitFormat(dryRun bool) error {
-	args := ReInitFormatArgs{DryRun: dryRun}
-	reply := VoidReply{}
-
-	return rpcClient.Call(adminServiceName+".ReInitFormat", &args, &reply)
-}
-
-// ListLocks - Sends list locks command to remote server via RPC.
-func (rpcClient *AdminRPCClient) ListLocks(bucket, prefix string, duration time.Duration) ([]VolumeLockInfo, error) {
-	args := ListLocksQuery{
-		Bucket:   bucket,
-		Prefix:   prefix,
-		Duration: duration,
-	}
-	var reply []VolumeLockInfo
-
-	err := rpcClient.Call(adminServiceName+".ListLocks", &args, &reply)
-	return reply, err
-}
-
 // ServerInfo - returns the server info of the server to which the RPC call is made.
 func (rpcClient *AdminRPCClient) ServerInfo() (sid ServerInfoData, err error) {
 	err = rpcClient.Call(adminServiceName+".ServerInfo", &AuthArgs{}, &sid)
 	return sid, err
 }
 
-// GetConfig - returns config.json of the remote server.
-func (rpcClient *AdminRPCClient) GetConfig() ([]byte, error) {
+// StartProfiling - starts profiling in the remote server.
+func (rpcClient *AdminRPCClient) StartProfiling(profiler string) error {
+	args := StartProfilingArgs{Profiler: profiler}
+	reply := VoidReply{}
+	return rpcClient.Call(adminServiceName+".StartProfiling", &args, &reply)
+}
+
+// DownloadProfilingData - returns profiling data of the remote server.
+func (rpcClient *AdminRPCClient) DownloadProfilingData() ([]byte, error) {
 	args := AuthArgs{}
 	var reply []byte
 
-	err := rpcClient.Call(adminServiceName+".GetConfig", &args, &reply)
+	err := rpcClient.Call(adminServiceName+".DownloadProfilingData", &args, &reply)
 	return reply, err
 }
 
-// WriteTmpConfig - writes config file content to a temporary file on a remote node.
-func (rpcClient *AdminRPCClient) WriteTmpConfig(tmpFileName string, configBytes []byte) error {
-	args := WriteConfigArgs{
-		TmpFileName: tmpFileName,
-		Buf:         configBytes,
-	}
-	reply := VoidReply{}
-
-	err := rpcClient.Call(adminServiceName+".WriteTmpConfig", &args, &reply)
-	logger.LogIf(context.Background(), err)
-	return err
-}
-
-// CommitConfig - Move the new config in tmpFileName onto config.json on a remote node.
-func (rpcClient *AdminRPCClient) CommitConfig(tmpFileName string) error {
-	args := CommitConfigArgs{FileName: tmpFileName}
-	reply := VoidReply{}
-
-	err := rpcClient.Call(adminServiceName+".CommitConfig", &args, &reply)
-	logger.LogIf(context.Background(), err)
-	return err
-}
-
 // NewAdminRPCClient - returns new admin RPC client.
 func NewAdminRPCClient(host *xnet.Host) (*AdminRPCClient, error) {
 	scheme := "http"
@@ -146,12 +108,9 @@ func NewAdminRPCClient(host *xnet.Host) (*AdminRPCClient, error) {
 // commands like service stop and service restart.
 type adminCmdRunner interface {
 	SignalService(s serviceSignal) error
-	ReInitFormat(dryRun bool) error
-	ListLocks(bucket, prefix string, duration time.Duration) ([]VolumeLockInfo, error)
 	ServerInfo() (ServerInfoData, error)
-	GetConfig() ([]byte, error)
-	WriteTmpConfig(tmpFileName string, configBytes []byte) error
-	CommitConfig(tmpFileName string) error
+	StartProfiling(string) error
+	DownloadProfilingData() ([]byte, error)
 }
 
 // adminPeer - represents an entity that implements admin API RPCs.
@@ -171,6 +130,11 @@ func makeAdminPeers(endpoints EndpointList) (adminPeerList adminPeers) {
 		// Use first IPv4 instead of loopback address.
 		localAddr = net.JoinHostPort(sortIPs(localIP4.ToSlice())[0], globalMinioPort)
 	}
+	if strings.HasPrefix(localAddr, "[::1]:") {
+		// Use first IPv4 instead of loopback address.
+		localAddr = net.JoinHostPort(localIP6.ToSlice()[0], globalMinioPort)
+	}
+
 	adminPeerList = append(adminPeerList, adminPeer{
 		addr:      localAddr,
 		cmdRunner: localAdminClient{},
@@ -179,9 +143,9 @@ func makeAdminPeers(endpoints EndpointList) (adminPeerList adminPeers) {
 
 	for _, hostStr := range GetRemotePeers(endpoints) {
 		host, err := xnet.ParseHost(hostStr)
-		logger.FatalIf(err, "Unable to parse Admin RPC Host", context.Background())
+		logger.FatalIf(err, "Unable to parse Admin RPC Host")
 		rpcClient, err := NewAdminRPCClient(host)
-		logger.FatalIf(err, "Unable to initialize Admin RPC Client", context.Background())
+		logger.FatalIf(err, "Unable to initialize Admin RPC Client")
 		adminPeerList = append(adminPeerList, adminPeer{
 			addr:      hostStr,
 			cmdRunner: rpcClient,
@@ -191,26 +155,6 @@ func makeAdminPeers(endpoints EndpointList) (adminPeerList adminPeers) {
 	return adminPeerList
 }
 
-// peersReInitFormat - reinitialize remote object layers to new format.
-func peersReInitFormat(peers adminPeers, dryRun bool) error {
-	errs := make([]error, len(peers))
-
-	// Send ReInitFormat RPC call to all nodes.
-	// for local adminPeer this is a no-op.
-	wg := sync.WaitGroup{}
-	for i, peer := range peers {
-		wg.Add(1)
-		go func(idx int, peer adminPeer) {
-			defer wg.Done()
-			if !peer.isLocal {
-				errs[idx] = peer.cmdRunner.ReInitFormat(dryRun)
-			}
-		}(i, peer)
-	}
-	wg.Wait()
-	return nil
-}
-
 // Initialize global adminPeer collection.
 func initGlobalAdminPeers(endpoints EndpointList) {
 	globalAdminPeers = makeAdminPeers(endpoints)
@@ -244,56 +188,6 @@ func sendServiceCmd(cps adminPeers, cmd serviceSignal) {
 	errs[0] = invokeServiceCmd(cps[0], cmd)
 }
 
-// listPeerLocksInfo - fetch list of locks held on the given bucket,
-// matching prefix held longer than duration from all peer servers.
-func listPeerLocksInfo(peers adminPeers, bucket, prefix string, duration time.Duration) ([]VolumeLockInfo, error) {
-	// Used to aggregate volume lock information from all nodes.
-	allLocks := make([][]VolumeLockInfo, len(peers))
-	errs := make([]error, len(peers))
-	var wg sync.WaitGroup
-	localPeer := peers[0]
-	remotePeers := peers[1:]
-	for i, remotePeer := range remotePeers {
-		wg.Add(1)
-		go func(idx int, remotePeer adminPeer) {
-			defer wg.Done()
-			// `remotePeers` is right-shifted by one position relative to `peers`
-			allLocks[idx], errs[idx] = remotePeer.cmdRunner.ListLocks(bucket, prefix, duration)
-		}(i+1, remotePeer)
-	}
-	wg.Wait()
-	allLocks[0], errs[0] = localPeer.cmdRunner.ListLocks(bucket, prefix, duration)
-
-	// Summarizing errors received for ListLocks RPC across all
-	// nodes.  N B the possible unavailability of quorum in errors
-	// applies only to distributed setup.
-	errCount, err := reduceErrs(errs, []error{})
-	if err != nil {
-		if errCount >= (len(peers)/2 + 1) {
-			return nil, err
-		}
-		return nil, InsufficientReadQuorum{}
-	}
-
-	// Group lock information across nodes by (bucket, object)
-	// pair. For readability only.
-	paramLockMap := make(map[nsParam][]VolumeLockInfo)
-	for _, nodeLocks := range allLocks {
-		for _, lockInfo := range nodeLocks {
-			param := nsParam{
-				volume: lockInfo.Bucket,
-				path:   lockInfo.Object,
-			}
-			paramLockMap[param] = append(paramLockMap[param], lockInfo)
-		}
-	}
-	groupedLockInfos := []VolumeLockInfo{}
-	for _, volLocks := range paramLockMap {
-		groupedLockInfos = append(groupedLockInfos, volLocks...)
-	}
-	return groupedLockInfos, nil
-}
-
 // uptimeSlice - used to sort uptimes in chronological order.
 type uptimeSlice []struct {
 	err    error
@@ -365,187 +259,3 @@ func getPeerUptimes(peers adminPeers) (time.Duration, error) {
 
 	return latestUptime, nil
 }
-
-// getPeerConfig - Fetches config.json from all nodes in the setup and
-// returns the one that occurs in a majority of them.
-func getPeerConfig(peers adminPeers) ([]byte, error) {
-	if !globalIsDistXL {
-		return peers[0].cmdRunner.GetConfig()
-	}
-
-	errs := make([]error, len(peers))
-	configs := make([][]byte, len(peers))
-
-	// Get config from all servers.
-	wg := sync.WaitGroup{}
-	for i, peer := range peers {
-		wg.Add(1)
-		go func(idx int, peer adminPeer) {
-			defer wg.Done()
-			configs[idx], errs[idx] = peer.cmdRunner.GetConfig()
-		}(i, peer)
-	}
-	wg.Wait()
-
-	// Find the maximally occurring config among peers in a
-	// distributed setup.
-
-	serverConfigs := make([]serverConfig, len(peers))
-	for i, configBytes := range configs {
-		if errs[i] != nil {
-			continue
-		}
-
-		// Unmarshal the received config files.
-		err := json.Unmarshal(configBytes, &serverConfigs[i])
-		if err != nil {
-			reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", peers[i].addr)
-			ctx := logger.SetReqInfo(context.Background(), reqInfo)
-			logger.LogIf(ctx, err)
-			return nil, err
-		}
-	}
-
-	configJSON, err := getValidServerConfig(serverConfigs, errs)
-	if err != nil {
-		logger.LogIf(context.Background(), err)
-		return nil, err
-	}
-
-	// Return the config.json that was present quorum or more
-	// number of disks.
-	return json.Marshal(configJSON)
-}
-
-// getValidServerConfig - finds the server config that is present in
-// quorum or more number of servers.
-func getValidServerConfig(serverConfigs []serverConfig, errs []error) (scv serverConfig, e error) {
-	// majority-based quorum
-	quorum := len(serverConfigs)/2 + 1
-
-	// Count the number of disks a config.json was found in.
-	configCounter := make([]int, len(serverConfigs))
-
-	// We group equal serverConfigs by the lowest index of the
-	// same value;  e.g, let us take the following serverConfigs
-	// in a 4-node setup,
-	// serverConfigs == [c1, c2, c1, c1]
-	// configCounter == [3, 1, 0, 0]
-	// c1, c2 are the only distinct values that appear.  c1 is
-	// identified by 0, the lowest index it appears in and c2 is
-	// identified by 1. So, we need to find the number of times
-	// each of these distinct values occur.
-
-	// Invariants:
-
-	// 1. At the beginning of the i-th iteration, the number of
-	// unique configurations seen so far is equal to the number of
-	// non-zero counter values in config[:i].
-
-	// 2. At the beginning of the i-th iteration, the sum of
-	// elements of configCounter[:i] is equal to the number of
-	// non-error configurations seen so far.
-
-	// For each of the serverConfig ...
-	for i := range serverConfigs {
-		// Skip nodes where getConfig failed.
-		if errs[i] != nil {
-			continue
-		}
-		// Check if it is equal to any of the configurations
-		// seen so far. If j == i is reached then we have an
-		// unseen configuration.
-		for j := 0; j <= i; j++ {
-			if j < i && configCounter[j] == 0 {
-				// serverConfigs[j] is known to be
-				// equal to a value that was already
-				// seen. See example above for
-				// clarity.
-				continue
-			} else if j < i && serverConfigs[i].ConfigDiff(&serverConfigs[j]) == "" {
-				// serverConfigs[i] is equal to
-				// serverConfigs[j], update
-				// serverConfigs[j]'s counter since it
-				// is the lower index.
-				configCounter[j]++
-				break
-			} else if j == i {
-				// serverConfigs[i] is equal to no
-				// other value seen before. It is
-				// unique so far.
-				configCounter[i] = 1
-				break
-			} // else invariants specified above are violated.
-		}
-	}
-
-	// We find the maximally occurring server config and check if
-	// there is quorum.
-	var configJSON serverConfig
-	maxOccurrence := 0
-	for i, count := range configCounter {
-		if maxOccurrence < count {
-			maxOccurrence = count
-			configJSON = serverConfigs[i]
-		}
-	}
-
-	// If quorum nodes don't agree.
-	if maxOccurrence < quorum {
-		return scv, errXLWriteQuorum
-	}
-
-	return configJSON, nil
-}
-
-// Write config contents into a temporary file on all nodes.
-func writeTmpConfigPeers(peers adminPeers, tmpFileName string, configBytes []byte) []error {
-	// For a single-node minio server setup.
-	if !globalIsDistXL {
-		err := peers[0].cmdRunner.WriteTmpConfig(tmpFileName, configBytes)
-		return []error{err}
-	}
-
-	errs := make([]error, len(peers))
-
-	// Write config into temporary file on all nodes.
-	wg := sync.WaitGroup{}
-	for i, peer := range peers {
-		wg.Add(1)
-		go func(idx int, peer adminPeer) {
-			defer wg.Done()
-			errs[idx] = peer.cmdRunner.WriteTmpConfig(tmpFileName, configBytes)
-		}(i, peer)
-	}
-	wg.Wait()
-
-	// Return bytes written and errors (if any) during writing
-	// temporary config file.
-	return errs
-}
-
-// Move config contents from the given temporary file onto config.json
-// on all nodes.
-func commitConfigPeers(peers adminPeers, tmpFileName string) []error {
-	// For a single-node minio server setup.
-	if !globalIsDistXL {
-		return []error{peers[0].cmdRunner.CommitConfig(tmpFileName)}
-	}
-
-	errs := make([]error, len(peers))
-
-	// Rename temporary config file into configDir/config.json on
-	// all nodes.
-	wg := sync.WaitGroup{}
-	for i, peer := range peers {
-		wg.Add(1)
-		go func(idx int, peer adminPeer) {
-			defer wg.Done()
-			errs[idx] = peer.cmdRunner.CommitConfig(tmpFileName)
-		}(i, peer)
-	}
-	wg.Wait()
-
-	// Return errors (if any) received during rename.
-	return errs
-}

cmd/admin-rpc-server.go

@@ -17,9 +17,7 @@
 package cmd
 
 import (
-	"context"
 	"path"
-	"time"
 
 	"github.com/gorilla/mux"
 	"github.com/minio/minio/cmd/logger"
@@ -47,66 +45,27 @@ func (receiver *adminRPCReceiver) SignalService(args *SignalServiceArgs, reply *
 	return receiver.local.SignalService(args.Sig)
 }
 
-// ListLocksQuery - wraps ListLocks API's query values to send over RPC.
-type ListLocksQuery struct {
-	AuthArgs
-	Bucket   string
-	Prefix   string
-	Duration time.Duration
-}
-
-// ListLocks - lists locks held by requests handled by this server instance.
-func (receiver *adminRPCReceiver) ListLocks(args *ListLocksQuery, reply *[]VolumeLockInfo) (err error) {
-	*reply, err = receiver.local.ListLocks(args.Bucket, args.Prefix, args.Duration)
-	return err
-}
-
 // ServerInfo - returns the server info when object layer was initialized on this server.
 func (receiver *adminRPCReceiver) ServerInfo(args *AuthArgs, reply *ServerInfoData) (err error) {
 	*reply, err = receiver.local.ServerInfo()
 	return err
 }
 
-// GetConfig - returns the config.json of this server.
-func (receiver *adminRPCReceiver) GetConfig(args *AuthArgs, reply *[]byte) (err error) {
-	*reply, err = receiver.local.GetConfig()
-	return err
-}
-
-// ReInitFormatArgs - provides dry-run information to re-initialize format.json
-type ReInitFormatArgs struct {
+// StartProfilingArgs - holds the RPC argument for StartingProfiling RPC call
+type StartProfilingArgs struct {
 	AuthArgs
-	DryRun bool
+	Profiler string
 }
 
-// ReInitFormat - re-init 'format.json'
-func (receiver *adminRPCReceiver) ReInitFormat(args *ReInitFormatArgs, reply *VoidReply) error {
-	return receiver.local.ReInitFormat(args.DryRun)
+// StartProfiling - starts profiling of this server
+func (receiver *adminRPCReceiver) StartProfiling(args *StartProfilingArgs, reply *VoidReply) error {
+	return receiver.local.StartProfiling(args.Profiler)
 }
 
-// WriteConfigArgs - wraps the bytes to be written and temporary file name.
-type WriteConfigArgs struct {
-	AuthArgs
-	TmpFileName string
-	Buf         []byte
-}
-
-// WriteTmpConfig - writes the supplied config contents onto the
-// supplied temporary file.
-func (receiver *adminRPCReceiver) WriteTmpConfig(args *WriteConfigArgs, reply *VoidReply) error {
-	return receiver.local.WriteTmpConfig(args.TmpFileName, args.Buf)
-}
-
-// CommitConfigArgs - wraps the config file name that needs to be
-// committed into config.json on this node.
-type CommitConfigArgs struct {
-	AuthArgs
-	FileName string
-}
-
-// CommitConfig - Renames the temporary file into config.json on this node.
-func (receiver *adminRPCReceiver) CommitConfig(args *CommitConfigArgs, reply *VoidReply) error {
-	return receiver.local.CommitConfig(args.FileName)
+// DownloadProfilingData - stops and returns profiling data of this server
+func (receiver *adminRPCReceiver) DownloadProfilingData(args *AuthArgs, reply *[]byte) (err error) {
+	*reply, err = receiver.local.DownloadProfilingData()
+	return
 }
 
 // NewAdminRPCServer - returns new admin RPC server.
@@ -121,7 +80,7 @@ func NewAdminRPCServer() (*xrpc.Server, error) {
 // registerAdminRPCRouter - creates and registers Admin RPC server and its router.
 func registerAdminRPCRouter(router *mux.Router) {
 	rpcServer, err := NewAdminRPCServer()
-	logger.FatalIf(err, "Unable to initialize Lock RPC Server", context.Background())
+	logger.FatalIf(err, "Unable to initialize Lock RPC Server")
 	subrouter := router.PathPrefix(minioReservedBucketPath).Subrouter()
-	subrouter.Path(adminServiceSubPath).Handler(rpcServer)
+	subrouter.Path(adminServiceSubPath).HandlerFunc(httpTraceHdrs(rpcServer.ServeHTTP))
 }

cmd/admin-rpc_test.go

@@ -17,13 +17,8 @@
 package cmd
 
 import (
-	"encoding/json"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
-	"os"
-	"path/filepath"
-	"reflect"
 	"testing"
 	"time"
 
@@ -45,11 +40,8 @@ import (
 ///////////////////////////////////////////////////////////////////////////////
 
 func testAdminCmdRunnerSignalService(t *testing.T, client adminCmdRunner) {
-	tmpGlobalServiceSignalCh := globalServiceSignalCh
+	defer func(sigChan chan serviceSignal) { globalServiceSignalCh = sigChan }(globalServiceSignalCh)
 	globalServiceSignalCh = make(chan serviceSignal, 10)
-	defer func() {
-		globalServiceSignalCh = tmpGlobalServiceSignalCh
-	}()
 
 	testCases := []struct {
 		signal    serviceSignal
@@ -71,59 +63,6 @@ func testAdminCmdRunnerSignalService(t *testing.T, client adminCmdRunner) {
 	}
 }
 
-func testAdminCmdRunnerReInitFormat(t *testing.T, client adminCmdRunner) {
-	tmpGlobalObjectAPI := globalObjectAPI
-	defer func() {
-		globalObjectAPI = tmpGlobalObjectAPI
-	}()
-
-	testCases := []struct {
-		objectAPI ObjectLayer
-		dryRun    bool
-		expectErr bool
-	}{
-		{&DummyObjectLayer{}, true, false},
-		{&DummyObjectLayer{}, false, false},
-		{nil, true, true},
-		{nil, false, true},
-	}
-
-	for i, testCase := range testCases {
-		globalObjectAPI = testCase.objectAPI
-		err := client.ReInitFormat(testCase.dryRun)
-		expectErr := (err != nil)
-
-		if expectErr != testCase.expectErr {
-			t.Fatalf("case %v: expected: %v, got: %v", i+1, testCase.expectErr, expectErr)
-		}
-	}
-}
-
-func testAdminCmdRunnerListLocks(t *testing.T, client adminCmdRunner) {
-	tmpGlobalObjectAPI := globalObjectAPI
-	defer func() {
-		globalObjectAPI = tmpGlobalObjectAPI
-	}()
-
-	testCases := []struct {
-		objectAPI ObjectLayer
-		expectErr bool
-	}{
-		{&DummyObjectLayer{}, false},
-		{nil, true},
-	}
-
-	for i, testCase := range testCases {
-		globalObjectAPI = testCase.objectAPI
-		_, err := client.ListLocks("", "", time.Duration(0))
-		expectErr := (err != nil)
-
-		if expectErr != testCase.expectErr {
-			t.Fatalf("case %v: expected: %v, got: %v", i+1, testCase.expectErr, expectErr)
-		}
-	}
-}
-
 func testAdminCmdRunnerServerInfo(t *testing.T, client adminCmdRunner) {
 	tmpGlobalBootTime := globalBootTime
 	tmpGlobalObjectAPI := globalObjectAPI
@@ -170,108 +109,6 @@ func testAdminCmdRunnerServerInfo(t *testing.T, client adminCmdRunner) {
 	}
 }
 
-func testAdminCmdRunnerGetConfig(t *testing.T, client adminCmdRunner) {
-	tmpGlobalServerConfig := globalServerConfig
-	defer func() {
-		globalServerConfig = tmpGlobalServerConfig
-	}()
-
-	config := newServerConfig()
-
-	testCases := []struct {
-		config    *serverConfig
-		expectErr bool
-	}{
-		{globalServerConfig, false},
-		{config, false},
-	}
-
-	for i, testCase := range testCases {
-		globalServerConfig = testCase.config
-		_, err := client.GetConfig()
-		expectErr := (err != nil)
-
-		if expectErr != testCase.expectErr {
-			t.Fatalf("case %v: expected: %v, got: %v", i+1, testCase.expectErr, expectErr)
-		}
-	}
-}
-
-func testAdminCmdRunnerWriteTmpConfig(t *testing.T, client adminCmdRunner) {
-	tmpConfigDir := configDir
-	defer func() {
-		configDir = tmpConfigDir
-	}()
-
-	tempDir, err := ioutil.TempDir("", ".AdminCmdRunnerWriteTmpConfig.")
-	if err != nil {
-		t.Fatalf("unexpected error %v", err)
-	}
-	defer os.RemoveAll(tempDir)
-	configDir = &ConfigDir{dir: tempDir}
-
-	testCases := []struct {
-		tmpFilename string
-		configBytes []byte
-		expectErr   bool
-	}{
-		{"config1.json", []byte(`{"version":"23","region":"us-west-1a"}`), false},
-		// Overwrite test.
-		{"config1.json", []byte(`{"version":"23","region":"us-west-1a","browser":"on"}`), false},
-		{"config2.json", []byte{}, false},
-		{"config3.json", nil, false},
-	}
-
-	for i, testCase := range testCases {
-		err := client.WriteTmpConfig(testCase.tmpFilename, testCase.configBytes)
-		expectErr := (err != nil)
-
-		if expectErr != testCase.expectErr {
-			t.Fatalf("case %v: expected: %v, got: %v", i+1, testCase.expectErr, expectErr)
-		}
-	}
-}
-
-func testAdminCmdRunnerCommitConfig(t *testing.T, client adminCmdRunner) {
-	tmpConfigDir := configDir
-	defer func() {
-		configDir = tmpConfigDir
-	}()
-
-	tempDir, err := ioutil.TempDir("", ".AdminCmdRunnerCommitConfig.")
-	if err != nil {
-		t.Fatalf("unexpected error %v", err)
-	}
-	defer os.RemoveAll(tempDir)
-	configDir = &ConfigDir{dir: tempDir}
-	err = ioutil.WriteFile(filepath.Join(tempDir, "config.json"), []byte{}, os.ModePerm)
-	if err != nil {
-		t.Fatalf("unexpected error %v", err)
-	}
-
-	err = client.WriteTmpConfig("config1.json", []byte(`{"version":"23","region":"us-west-1a"}`))
-	if err != nil {
-		t.Fatalf("unexpected error %v", err)
-	}
-
-	testCases := []struct {
-		tmpFilename string
-		expectErr   bool
-	}{
-		{"config1.json", false},
-		{"config2.json", true},
-	}
-
-	for i, testCase := range testCases {
-		err := client.CommitConfig(testCase.tmpFilename)
-		expectErr := (err != nil)
-
-		if expectErr != testCase.expectErr {
-			t.Fatalf("case %v: expected: %v, got: %v", i+1, testCase.expectErr, expectErr)
-		}
-	}
-}
-
 func newAdminRPCHTTPServerClient(t *testing.T) (*httptest.Server, *AdminRPCClient, *serverConfig) {
 	rpcServer, err := NewAdminRPCServer()
 	if err != nil {
@@ -313,26 +150,6 @@ func TestAdminRPCClientSignalService(t *testing.T) {
 	testAdminCmdRunnerSignalService(t, rpcClient)
 }
 
-func TestAdminRPCClientReInitFormat(t *testing.T) {
-	httpServer, rpcClient, prevGlobalServerConfig := newAdminRPCHTTPServerClient(t)
-	defer httpServer.Close()
-	defer func() {
-		globalServerConfig = prevGlobalServerConfig
-	}()
-
-	testAdminCmdRunnerReInitFormat(t, rpcClient)
-}
-
-func TestAdminRPCClientListLocks(t *testing.T) {
-	httpServer, rpcClient, prevGlobalServerConfig := newAdminRPCHTTPServerClient(t)
-	defer httpServer.Close()
-	defer func() {
-		globalServerConfig = prevGlobalServerConfig
-	}()
-
-	testAdminCmdRunnerListLocks(t, rpcClient)
-}
-
 func TestAdminRPCClientServerInfo(t *testing.T) {
 	httpServer, rpcClient, prevGlobalServerConfig := newAdminRPCHTTPServerClient(t)
 	defer httpServer.Close()
@@ -342,270 +159,3 @@ func TestAdminRPCClientServerInfo(t *testing.T) {
 
 	testAdminCmdRunnerServerInfo(t, rpcClient)
 }
-
-func TestAdminRPCClientGetConfig(t *testing.T) {
-	httpServer, rpcClient, prevGlobalServerConfig := newAdminRPCHTTPServerClient(t)
-	defer httpServer.Close()
-	defer func() {
-		globalServerConfig = prevGlobalServerConfig
-	}()
-
-	testAdminCmdRunnerGetConfig(t, rpcClient)
-}
-
-func TestAdminRPCClientWriteTmpConfig(t *testing.T) {
-	httpServer, rpcClient, prevGlobalServerConfig := newAdminRPCHTTPServerClient(t)
-	defer httpServer.Close()
-	defer func() {
-		globalServerConfig = prevGlobalServerConfig
-	}()
-
-	testAdminCmdRunnerWriteTmpConfig(t, rpcClient)
-}
-
-func TestAdminRPCClientCommitConfig(t *testing.T) {
-	httpServer, rpcClient, prevGlobalServerConfig := newAdminRPCHTTPServerClient(t)
-	defer httpServer.Close()
-	defer func() {
-		globalServerConfig = prevGlobalServerConfig
-	}()
-
-	testAdminCmdRunnerCommitConfig(t, rpcClient)
-}
-
-var (
-	config1 = []byte(`{
-	"version": "13",
-	"credential": {
-		"accessKey": "minio",
-		"secretKey": "minio123"
-	},
-	"region": "us-east-1",
-	"logger": {
-		"console": {
-			"enable": true,
-			"level": "debug"
-		},
-		"file": {
-			"enable": false,
-			"fileName": "",
-			"level": ""
-		}
-	},
-	"notify": {
-		"amqp": {
-			"1": {
-				"enable": false,
-				"url": "",
-				"exchange": "",
-				"routingKey": "",
-				"exchangeType": "",
-				"mandatory": false,
-				"immediate": false,
-				"durable": false,
-				"internal": false,
-				"noWait": false,
-				"autoDeleted": false
-			}
-		},
-		"nats": {
-			"1": {
-				"enable": false,
-				"address": "",
-				"subject": "",
-				"username": "",
-				"password": "",
-				"token": "",
-				"secure": false,
-				"pingInterval": 0,
-				"streaming": {
-					"enable": false,
-					"clusterID": "",
-					"clientID": "",
-					"async": false,
-					"maxPubAcksInflight": 0
-				}
-			}
-		},
-		"elasticsearch": {
-			"1": {
-				"enable": false,
-				"url": "",
-				"index": ""
-			}
-		},
-		"redis": {
-			"1": {
-				"enable": false,
-				"address": "",
-				"password": "",
-				"key": ""
-			}
-		},
-		"postgresql": {
-			"1": {
-				"enable": false,
-				"connectionString": "",
-				"table": "",
-				"host": "",
-				"port": "",
-				"user": "",
-				"password": "",
-				"database": ""
-			}
-		},
-		"kafka": {
-			"1": {
-				"enable": false,
-				"brokers": null,
-				"topic": ""
-			}
-		},
-		"webhook": {
-			"1": {
-				"enable": false,
-				"endpoint": ""
-			}
-		}
-	}
-}
-`)
-	// diff from config1 - amqp.Enable is True
-	config2 = []byte(`{
-	"version": "13",
-	"credential": {
-		"accessKey": "minio",
-		"secretKey": "minio123"
-	},
-	"region": "us-east-1",
-	"logger": {
-		"console": {
-			"enable": true,
-			"level": "debug"
-		},
-		"file": {
-			"enable": false,
-			"fileName": "",
-			"level": ""
-		}
-	},
-	"notify": {
-		"amqp": {
-			"1": {
-				"enable": true,
-				"url": "",
-				"exchange": "",
-				"routingKey": "",
-				"exchangeType": "",
-				"mandatory": false,
-				"immediate": false,
-				"durable": false,
-				"internal": false,
-				"noWait": false,
-				"autoDeleted": false
-			}
-		},
-		"nats": {
-			"1": {
-				"enable": false,
-				"address": "",
-				"subject": "",
-				"username": "",
-				"password": "",
-				"token": "",
-				"secure": false,
-				"pingInterval": 0,
-				"streaming": {
-					"enable": false,
-					"clusterID": "",
-					"clientID": "",
-					"async": false,
-					"maxPubAcksInflight": 0
-				}
-			}
-		},
-		"elasticsearch": {
-			"1": {
-				"enable": false,
-				"url": "",
-				"index": ""
-			}
-		},
-		"redis": {
-			"1": {
-				"enable": false,
-				"address": "",
-				"password": "",
-				"key": ""
-			}
-		},
-		"postgresql": {
-			"1": {
-				"enable": false,
-				"connectionString": "",
-				"table": "",
-				"host": "",
-				"port": "",
-				"user": "",
-				"password": "",
-				"database": ""
-			}
-		},
-		"kafka": {
-			"1": {
-				"enable": false,
-				"brokers": null,
-				"topic": ""
-			}
-		},
-		"webhook": {
-			"1": {
-				"enable": false,
-				"endpoint": ""
-			}
-		}
-	}
-}
-`)
-)
-
-// TestGetValidServerConfig - test for getValidServerConfig.
-func TestGetValidServerConfig(t *testing.T) {
-	var c1, c2 serverConfig
-	err := json.Unmarshal(config1, &c1)
-	if err != nil {
-		t.Fatalf("json unmarshal of %s failed: %v", string(config1), err)
-	}
-
-	err = json.Unmarshal(config2, &c2)
-	if err != nil {
-		t.Fatalf("json unmarshal of %s failed: %v", string(config2), err)
-	}
-
-	// Valid config.
-	noErrs := []error{nil, nil, nil, nil}
-	serverConfigs := []serverConfig{c1, c2, c1, c1}
-	validConfig, err := getValidServerConfig(serverConfigs, noErrs)
-	if err != nil {
-		t.Errorf("Expected a valid config but received %v instead", err)
-	}
-
-	if !reflect.DeepEqual(validConfig, c1) {
-		t.Errorf("Expected valid config to be %v but received %v", config1, validConfig)
-	}
-
-	// Invalid config - no quorum.
-	serverConfigs = []serverConfig{c1, c2, c2, c1}
-	_, err = getValidServerConfig(serverConfigs, noErrs)
-	if err != errXLWriteQuorum {
-		t.Errorf("Expected to fail due to lack of quorum but received %v", err)
-	}
-
-	// All errors
-	allErrs := []error{errDiskNotFound, errDiskNotFound, errDiskNotFound, errDiskNotFound}
-	serverConfigs = []serverConfig{{}, {}, {}, {}}
-	_, err = getValidServerConfig(serverConfigs, allErrs)
-	if err != errXLWriteQuorum {
-		t.Errorf("Expected to fail due to lack of quorum but received %v", err)
-	}
-}

cmd/api-datatypes.go

@@ -23,6 +23,8 @@ import (
 const (
 	// Response request id.
 	responseRequestIDKey = "x-amz-request-id"
+	// Deployment id.
+	responseDeploymentIDKey = "x-minio-deployment-id"
 )
 
 // ObjectIdentifier carries key name for the object to delete.

cmd/api-errors_test.go

@@ -17,9 +17,11 @@
 package cmd
 
 import (
+	"context"
 	"errors"
 	"testing"
 
+	"github.com/minio/minio/cmd/crypto"
 	"github.com/minio/minio/pkg/hash"
 )
 
@@ -51,12 +53,11 @@ var toAPIErrorCodeTests = []struct {
 	{err: errSignatureMismatch, errCode: ErrSignatureDoesNotMatch},
 
 	// SSE-C errors
-	{err: errInsecureSSERequest, errCode: ErrInsecureSSECustomerRequest},
-	{err: errInvalidSSEAlgorithm, errCode: ErrInvalidSSECustomerAlgorithm},
-	{err: errMissingSSEKey, errCode: ErrMissingSSECustomerKey},
-	{err: errInvalidSSEKey, errCode: ErrInvalidSSECustomerKey},
-	{err: errMissingSSEKeyMD5, errCode: ErrMissingSSECustomerKeyMD5},
-	{err: errSSEKeyMD5Mismatch, errCode: ErrSSECustomerKeyMD5Mismatch},
+	{err: crypto.ErrInvalidCustomerAlgorithm, errCode: ErrInvalidSSECustomerAlgorithm},
+	{err: crypto.ErrMissingCustomerKey, errCode: ErrMissingSSECustomerKey},
+	{err: crypto.ErrInvalidCustomerKey, errCode: ErrInvalidSSECustomerKey},
+	{err: crypto.ErrMissingCustomerKeyMD5, errCode: ErrMissingSSECustomerKeyMD5},
+	{err: crypto.ErrCustomerKeyMD5Mismatch, errCode: ErrSSECustomerKeyMD5Mismatch},
 	{err: errObjectTampered, errCode: ErrObjectTampered},
 
 	{err: nil, errCode: ErrNone},
@@ -64,8 +65,9 @@ var toAPIErrorCodeTests = []struct {
 }
 
 func TestAPIErrCode(t *testing.T) {
+	ctx := context.Background()
 	for i, testCase := range toAPIErrorCodeTests {
-		errCode := toAPIErrorCode(testCase.err)
+		errCode := toAPIErrorCode(ctx, testCase.err)
 		if errCode != testCase.errCode {
 			t.Errorf("Test %d: Expected error code %d, got %d", i+1, testCase.errCode, errCode)
 		}

cmd/api-headers.go

@@ -24,6 +24,8 @@ import (
 	"net/http"
 	"strconv"
 	"time"
+
+	"github.com/minio/minio/cmd/crypto"
 )
 
 // Returns a hexadecimal representation of time at the
@@ -34,8 +36,6 @@ func mustGetRequestID(t time.Time) string {
 
 // Write http common headers
 func setCommonHeaders(w http.ResponseWriter) {
-	// Set unique request ID for each reply.
-	w.Header().Set(responseRequestIDKey, mustGetRequestID(UTCNow()))
 	w.Header().Set("Server", globalServerUserAgent)
 	// Set `x-amz-bucket-region` only if region is set on the server
 	// by default minio uses an empty region.
@@ -43,6 +43,9 @@ func setCommonHeaders(w http.ResponseWriter) {
 		w.Header().Set("X-Amz-Bucket-Region", region)
 	}
 	w.Header().Set("Accept-Ranges", "bytes")
+
+	// Remove sensitive information
+	crypto.RemoveSensitiveHeaders(w.Header())
 }
 
 // Encodes the response headers into XML format.
@@ -63,13 +66,10 @@ func encodeResponseJSON(response interface{}) []byte {
 }
 
 // Write object header
-func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, contentRange *httpRange) {
+func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, rs *HTTPRangeSpec) (err error) {
 	// set common headers
 	setCommonHeaders(w)
 
-	// Set content length.
-	w.Header().Set("Content-Length", strconv.FormatInt(objInfo.Size, 10))
-
 	// Set last modified time.
 	lastModified := objInfo.ModTime.UTC().Format(http.TimeFormat)
 	w.Header().Set("Last-Modified", lastModified)
@@ -97,11 +97,34 @@ func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, contentRange *h
 		w.Header().Set(k, v)
 	}
 
-	// for providing ranged content
-	if contentRange != nil && contentRange.offsetBegin > -1 {
-		// Override content-length
-		w.Header().Set("Content-Length", strconv.FormatInt(contentRange.getLength(), 10))
-		w.Header().Set("Content-Range", contentRange.String())
-		w.WriteHeader(http.StatusPartialContent)
+	var totalObjectSize int64
+	switch {
+	case crypto.IsEncrypted(objInfo.UserDefined):
+		totalObjectSize, err = objInfo.DecryptedSize()
+		if err != nil {
+			return err
+		}
+	case objInfo.IsCompressed():
+		totalObjectSize = objInfo.GetActualSize()
+		if totalObjectSize < 0 {
+			return errInvalidDecompressedSize
+		}
+	default:
+		totalObjectSize = objInfo.Size
 	}
+
+	// for providing ranged content
+	start, rangeLen, err := rs.GetOffsetLength(totalObjectSize)
+	if err != nil {
+		return err
+	}
+
+	// Set content length.
+	w.Header().Set("Content-Length", strconv.FormatInt(rangeLen, 10))
+	if rs != nil {
+		contentRange := fmt.Sprintf("bytes %d-%d/%d", start, start+rangeLen-1, totalObjectSize)
+		w.Header().Set("Content-Range", contentRange)
+	}
+
+	return nil
 }

cmd/api-resources.go

@@ -22,15 +22,22 @@ import (
 )
 
 // Parse bucket url queries
-func getListObjectsV1Args(values url.Values) (prefix, marker, delimiter string, maxkeys int, encodingType string) {
-	prefix = values.Get("prefix")
-	marker = values.Get("marker")
-	delimiter = values.Get("delimiter")
+func getListObjectsV1Args(values url.Values) (prefix, marker, delimiter string, maxkeys int, encodingType string, errCode APIErrorCode) {
+	errCode = ErrNone
+
 	if values.Get("max-keys") != "" {
-		maxkeys, _ = strconv.Atoi(values.Get("max-keys"))
+		var err error
+		if maxkeys, err = strconv.Atoi(values.Get("max-keys")); err != nil {
+			errCode = ErrInvalidMaxKeys
+			return
+		}
 	} else {
 		maxkeys = maxObjectList
 	}
+
+	prefix = values.Get("prefix")
+	marker = values.Get("marker")
+	delimiter = values.Get("delimiter")
 	encodingType = values.Get("encoding-type")
 	return
 }
@@ -47,44 +54,69 @@ func getListObjectsV2Args(values url.Values) (prefix, token, startAfter, delimit
 		}
 	}
 
+	if values.Get("max-keys") != "" {
+		var err error
+		if maxkeys, err = strconv.Atoi(values.Get("max-keys")); err != nil {
+			errCode = ErrInvalidMaxKeys
+			return
+		}
+	} else {
+		maxkeys = maxObjectList
+	}
+
 	prefix = values.Get("prefix")
 	token = values.Get("continuation-token")
 	startAfter = values.Get("start-after")
 	delimiter = values.Get("delimiter")
-	if values.Get("max-keys") != "" {
-		maxkeys, _ = strconv.Atoi(values.Get("max-keys"))
-	} else {
-		maxkeys = maxObjectList
-	}
 	fetchOwner = values.Get("fetch-owner") == "true"
 	encodingType = values.Get("encoding-type")
 	return
 }
 
 // Parse bucket url queries for ?uploads
-func getBucketMultipartResources(values url.Values) (prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int, encodingType string) {
+func getBucketMultipartResources(values url.Values) (prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int, encodingType string, errCode APIErrorCode) {
+	errCode = ErrNone
+
+	if values.Get("max-uploads") != "" {
+		var err error
+		if maxUploads, err = strconv.Atoi(values.Get("max-uploads")); err != nil {
+			errCode = ErrInvalidMaxUploads
+			return
+		}
+	} else {
+		maxUploads = maxUploadsList
+	}
+
 	prefix = values.Get("prefix")
 	keyMarker = values.Get("key-marker")
 	uploadIDMarker = values.Get("upload-id-marker")
 	delimiter = values.Get("delimiter")
-	if values.Get("max-uploads") != "" {
-		maxUploads, _ = strconv.Atoi(values.Get("max-uploads"))
-	} else {
-		maxUploads = maxUploadsList
-	}
 	encodingType = values.Get("encoding-type")
 	return
 }
 
 // Parse object url queries
-func getObjectResources(values url.Values) (uploadID string, partNumberMarker, maxParts int, encodingType string) {
-	uploadID = values.Get("uploadId")
-	partNumberMarker, _ = strconv.Atoi(values.Get("part-number-marker"))
+func getObjectResources(values url.Values) (uploadID string, partNumberMarker, maxParts int, encodingType string, errCode APIErrorCode) {
+	var err error
+	errCode = ErrNone
+
 	if values.Get("max-parts") != "" {
-		maxParts, _ = strconv.Atoi(values.Get("max-parts"))
+		if maxParts, err = strconv.Atoi(values.Get("max-parts")); err != nil {
+			errCode = ErrInvalidMaxParts
+			return
+		}
 	} else {
 		maxParts = maxPartsList
 	}
+
+	if values.Get("part-number-marker") != "" {
+		if partNumberMarker, err = strconv.Atoi(values.Get("part-number-marker")); err != nil {
+			errCode = ErrInvalidPartNumberMarker
+			return
+		}
+	}
+
+	uploadID = values.Get("uploadId")
 	encodingType = values.Get("encoding-type")
 	return
 }

cmd/api-resources_test.go

@@ -156,7 +156,10 @@ func TestListObjectsV1Resources(t *testing.T) {
 	}
 
 	for i, testCase := range testCases {
-		prefix, marker, delimiter, maxKeys, encodingType := getListObjectsV1Args(testCase.values)
+		prefix, marker, delimiter, maxKeys, encodingType, argsErr := getListObjectsV1Args(testCase.values)
+		if argsErr != ErrNone {
+			t.Errorf("Test %d: argument parsing failed, got %v", i+1, argsErr)
+		}
 		if prefix != testCase.prefix {
 			t.Errorf("Test %d: Expected %s, got %s", i+1, testCase.prefix, prefix)
 		}
@@ -198,7 +201,10 @@ func TestGetObjectsResources(t *testing.T) {
 	}
 
 	for i, testCase := range testCases {
-		uploadID, partNumberMarker, maxParts, encodingType := getObjectResources(testCase.values)
+		uploadID, partNumberMarker, maxParts, encodingType, argsErr := getObjectResources(testCase.values)
+		if argsErr != ErrNone {
+			t.Errorf("Test %d: argument parsing failed, got %v", i+1, argsErr)
+		}
 		if uploadID != testCase.uploadID {
 			t.Errorf("Test %d: Expected %s, got %s", i+1, testCase.uploadID, uploadID)
 		}

cmd/api-response-multipart.go

@@ -16,7 +16,10 @@
 
 package cmd
 
-import "net/http"
+import (
+	"context"
+	"net/http"
+)
 
 // Represents additional fields necessary for ErrPartTooSmall S3 error.
 type completeMultipartAPIError struct {
@@ -42,9 +45,9 @@ type completeMultipartAPIError struct {
 // of this function.
 func writePartSmallErrorResponse(w http.ResponseWriter, r *http.Request, err PartTooSmall) {
 
-	apiError := getAPIError(toAPIErrorCode(err))
+	apiError := getAPIError(toAPIErrorCode(context.Background(), err))
 	// Generate complete multipart error response.
-	errorResponse := getAPIErrorResponse(apiError, r.URL.Path)
+	errorResponse := getAPIErrorResponse(apiError, r.URL.Path, w.Header().Get(responseRequestIDKey))
 	cmpErrResp := completeMultipartAPIError{err.PartSize, int64(5242880), err.PartNumber, err.PartETag, errorResponse}
 	encodedErrorResponse := encodeResponse(cmpErrResp)
 

cmd/api-response.go

@@ -568,16 +568,25 @@ func writeSuccessResponseHeadersOnly(w http.ResponseWriter) {
 }
 
 // writeErrorRespone writes error headers
-func writeErrorResponse(w http.ResponseWriter, errorCode APIErrorCode, reqURL *url.URL) {
+func writeErrorResponse(w http.ResponseWriter, errorCode APIErrorCode, reqURL *url.URL, browser bool) {
 	switch errorCode {
 	case ErrSlowDown, ErrServerNotInitialized, ErrReadQuorum, ErrWriteQuorum:
 		// Set retry-after header to indicate user-agents to retry request after 120secs.
 		// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Retry-After
 		w.Header().Set("Retry-After", "120")
+	case ErrAccessDenied:
+		// The request is from browser and also if browser
+		// is enabled we need to redirect.
+		if browser && globalIsBrowserEnabled {
+			w.Header().Set("Location", minioReservedBucketPath+reqURL.Path)
+			w.WriteHeader(http.StatusTemporaryRedirect)
+			return
+		}
 	}
+
 	apiError := getAPIError(errorCode)
 	// Generate error response.
-	errorResponse := getAPIErrorResponse(apiError, reqURL.Path)
+	errorResponse := getAPIErrorResponse(apiError, reqURL.Path, w.Header().Get(responseRequestIDKey))
 	encodedErrorResponse := encodeResponse(errorResponse)
 	writeResponse(w, apiError.HTTPStatusCode, encodedErrorResponse, mimeXML)
 }
@@ -592,7 +601,7 @@ func writeErrorResponseHeadersOnly(w http.ResponseWriter, errorCode APIErrorCode
 func writeErrorResponseJSON(w http.ResponseWriter, errorCode APIErrorCode, reqURL *url.URL) {
 	apiError := getAPIError(errorCode)
 	// Generate error response.
-	errorResponse := getAPIErrorResponse(apiError, reqURL.Path)
+	errorResponse := getAPIErrorResponse(apiError, reqURL.Path, w.Header().Get(responseRequestIDKey))
 	encodedErrorResponse := encodeResponseJSON(errorResponse)
 	writeResponse(w, apiError.HTTPStatusCode, encodedErrorResponse, mimeJSON)
 }
@@ -608,7 +617,7 @@ func writeCustomErrorResponseJSON(w http.ResponseWriter, errorCode APIErrorCode,
 		Code:      apiError.Code,
 		Message:   errBody,
 		Resource:  reqURL.Path,
-		RequestID: "3L137",
+		RequestID: w.Header().Get(responseRequestIDKey),
 		HostID:    "3L137",
 	}
 	encodedErrorResponse := encodeResponseJSON(errorResponse)

cmd/api-router.go

@@ -20,7 +20,6 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
-	"github.com/minio/minio/cmd/logger"
 )
 
 // objectAPIHandler implements and provides http handlers for S3 API.
@@ -31,14 +30,6 @@ type objectAPIHandlers struct {
 
 // registerAPIRouter - registers S3 compatible APIs.
 func registerAPIRouter(router *mux.Router) {
-	var err error
-	var cacheConfig = globalServerConfig.GetCacheConfig()
-	if len(cacheConfig.Drives) > 0 {
-		// initialize the new disk cache objects.
-		globalCacheObjectAPI, err = newServerCacheObjects(cacheConfig)
-		logger.FatalIf(err, "Unable to initialize disk caching")
-	}
-
 	// Initialize API.
 	api := objectAPIHandlers{
 		ObjectAPI: newObjectLayerFn,
@@ -71,6 +62,8 @@ func registerAPIRouter(router *mux.Router) {
 		bucket.Methods("DELETE").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.AbortMultipartUploadHandler)).Queries("uploadId", "{uploadId:.*}")
 		// GetObjectACL - this is a dummy call.
 		bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.GetObjectACLHandler)).Queries("acl", "")
+		// SelectObjectContent
+		bucket.Methods("POST").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.SelectObjectContentHandler)).Queries("select", "").Queries("select-type", "2")
 		// GetObject
 		bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.GetObjectHandler))
 		// CopyObject
@@ -108,7 +101,7 @@ func registerAPIRouter(router *mux.Router) {
 		// HeadBucket
 		bucket.Methods("HEAD").HandlerFunc(httpTraceAll(api.HeadBucketHandler))
 		// PostPolicy
-		bucket.Methods("POST").HeadersRegexp("Content-Type", "multipart/form-data*").HandlerFunc(httpTraceAll(api.PostPolicyBucketHandler))
+		bucket.Methods("POST").HeadersRegexp("Content-Type", "multipart/form-data*").HandlerFunc(httpTraceHdrs(api.PostPolicyBucketHandler))
 		// DeleteMultipleObjects
 		bucket.Methods("POST").HandlerFunc(httpTraceAll(api.DeleteMultipleObjectsHandler)).Queries("delete", "")
 		// DeleteBucketPolicy

cmd/auth-handler.go

@@ -19,6 +19,7 @@ package cmd
 import (
 	"bytes"
 	"context"
+	"crypto/subtle"
 	"encoding/base64"
 	"encoding/hex"
 	"errors"
@@ -27,8 +28,11 @@ import (
 	"net/http"
 	"strings"
 
+	jwtgo "github.com/dgrijalva/jwt-go"
 	"github.com/minio/minio/cmd/logger"
+	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/hash"
+	"github.com/minio/minio/pkg/iam/policy"
 	"github.com/minio/minio/pkg/policy"
 )
 
@@ -86,6 +90,7 @@ const (
 	authTypeSigned
 	authTypeSignedV2
 	authTypeJWT
+	authTypeSTS
 )
 
 // Get request authentication type.
@@ -104,6 +109,8 @@ func getRequestAuthType(r *http.Request) authType {
 		return authTypeJWT
 	} else if isRequestPostPolicySignatureV4(r) {
 		return authTypePostPolicy
+	} else if _, ok := r.URL.Query()["Action"]; ok {
+		return authTypeSTS
 	} else if _, ok := r.Header["Authorization"]; !ok {
 		return authTypeAnonymous
 	}
@@ -112,43 +119,140 @@ func getRequestAuthType(r *http.Request) authType {
 
 // checkAdminRequestAuthType checks whether the request is a valid signature V2 or V4 request.
 // It does not accept presigned or JWT or anonymous requests.
-func checkAdminRequestAuthType(r *http.Request, region string) APIErrorCode {
+func checkAdminRequestAuthType(ctx context.Context, r *http.Request, region string) APIErrorCode {
 	s3Err := ErrAccessDenied
-	if _, ok := r.Header["X-Amz-Content-Sha256"]; ok && getRequestAuthType(r) == authTypeSigned && !skipContentSha256Cksum(r) { // we only support V4 (no presign) with auth. body
-		s3Err = isReqAuthenticated(r, region)
+	if _, ok := r.Header["X-Amz-Content-Sha256"]; ok &&
+		getRequestAuthType(r) == authTypeSigned && !skipContentSha256Cksum(r) {
+		// We only support admin credentials to access admin APIs.
+
+		var owner bool
+		_, owner, s3Err = getReqAccessKeyV4(r, region)
+		if s3Err != ErrNone {
+			return s3Err
+		}
+
+		if !owner {
+			return ErrAccessDenied
+		}
+
+		// we only support V4 (no presign) with auth body
+		s3Err = isReqAuthenticated(ctx, r, region)
 	}
 	if s3Err != ErrNone {
 		reqInfo := (&logger.ReqInfo{}).AppendTags("requestHeaders", dumpRequest(r))
-		ctx := logger.SetReqInfo(context.Background(), reqInfo)
+		ctx := logger.SetReqInfo(ctx, reqInfo)
 		logger.LogIf(ctx, errors.New(getAPIError(s3Err).Description))
 	}
 	return s3Err
 }
 
-func checkRequestAuthType(ctx context.Context, r *http.Request, action policy.Action, bucketName, objectName string) APIErrorCode {
-	isOwner := true
-	accountName := globalServerConfig.GetCredential().AccessKey
+// Fetch the security token set by the client.
+func getSessionToken(r *http.Request) (token string) {
+	token = r.Header.Get("X-Amz-Security-Token")
+	if token != "" {
+		return token
+	}
+	return r.URL.Query().Get("X-Amz-Security-Token")
+}
 
+// Fetch claims in the security token returned by the client, doesn't return
+// errors - upon errors the returned claims map will be empty.
+func mustGetClaimsFromToken(r *http.Request) map[string]interface{} {
+	claims, _ := getClaimsFromToken(r)
+	return claims
+}
+
+// Fetch claims in the security token returned by the client.
+func getClaimsFromToken(r *http.Request) (map[string]interface{}, error) {
+	claims := make(map[string]interface{})
+	token := getSessionToken(r)
+	if token == "" {
+		return claims, nil
+	}
+	stsTokenCallback := func(jwtToken *jwtgo.Token) (interface{}, error) {
+		// JWT token for x-amz-security-token is signed with admin
+		// secret key, temporary credentials become invalid if
+		// server admin credentials change. This is done to ensure
+		// that clients cannot decode the token using the temp
+		// secret keys and generate an entirely new claim by essentially
+		// hijacking the policies. We need to make sure that this is
+		// based an admin credential such that token cannot be decoded
+		// on the client side and is treated like an opaque value.
+		return []byte(globalServerConfig.GetCredential().SecretKey), nil
+	}
+	p := &jwtgo.Parser{
+		ValidMethods: []string{
+			jwtgo.SigningMethodHS256.Alg(),
+			jwtgo.SigningMethodHS512.Alg(),
+		},
+	}
+	jtoken, err := p.ParseWithClaims(token, jwtgo.MapClaims(claims), stsTokenCallback)
+	if err != nil {
+		return nil, err
+	}
+	if !jtoken.Valid {
+		return nil, errAuthentication
+	}
+	v, ok := claims["accessKey"]
+	if !ok {
+		return nil, errInvalidAccessKeyID
+	}
+	if _, ok = v.(string); !ok {
+		return nil, errInvalidAccessKeyID
+	}
+	return claims, nil
+}
+
+// Fetch claims in the security token returned by the client and validate the token.
+func checkClaimsFromToken(r *http.Request, cred auth.Credentials) (map[string]interface{}, APIErrorCode) {
+	token := getSessionToken(r)
+	if token != "" && cred.AccessKey == "" {
+		return nil, ErrNoAccessKey
+	}
+	if subtle.ConstantTimeCompare([]byte(token), []byte(cred.SessionToken)) != 1 {
+		return nil, ErrInvalidToken
+	}
+	claims, err := getClaimsFromToken(r)
+	if err != nil {
+		return nil, toAPIErrorCode(context.Background(), err)
+	}
+	return claims, ErrNone
+}
+
+// Check request auth type verifies the incoming http request
+// - validates the request signature
+// - validates the policy action if anonymous tests bucket policies if any,
+//   for authenticated requests validates IAM policies.
+// returns APIErrorCode if any to be replied to the client.
+func checkRequestAuthType(ctx context.Context, r *http.Request, action policy.Action, bucketName, objectName string) (s3Err APIErrorCode) {
+	var cred auth.Credentials
+	var owner bool
 	switch getRequestAuthType(r) {
-	case authTypeUnknown:
+	case authTypeUnknown, authTypeStreamingSigned:
 		return ErrAccessDenied
 	case authTypePresignedV2, authTypeSignedV2:
-		if errorCode := isReqAuthenticatedV2(r); errorCode != ErrNone {
-			return errorCode
+		if s3Err = isReqAuthenticatedV2(r); s3Err != ErrNone {
+			return s3Err
 		}
+		cred, owner, s3Err = getReqAccessKeyV2(r)
 	case authTypeSigned, authTypePresigned:
 		region := globalServerConfig.GetRegion()
 		switch action {
 		case policy.GetBucketLocationAction, policy.ListAllMyBucketsAction:
 			region = ""
 		}
-
-		if errorCode := isReqAuthenticated(r, region); errorCode != ErrNone {
-			return errorCode
+		if s3Err = isReqAuthenticated(ctx, r, region); s3Err != ErrNone {
+			return s3Err
 		}
-	default:
-		isOwner = false
-		accountName = ""
+		cred, owner, s3Err = getReqAccessKeyV4(r, region)
+	}
+	if s3Err != ErrNone {
+		return s3Err
+	}
+
+	claims, s3Err := checkClaimsFromToken(r, cred)
+	if s3Err != ErrNone {
+		return s3Err
 	}
 
 	// LocationConstraint is valid only for CreateBucketAction.
@@ -174,17 +278,31 @@ func checkRequestAuthType(ctx context.Context, r *http.Request, action policy.Ac
 		r.Body = ioutil.NopCloser(bytes.NewReader(payload))
 	}
 
-	if globalPolicySys.IsAllowed(policy.Args{
-		AccountName:     accountName,
-		Action:          action,
+	if cred.AccessKey == "" {
+		if globalPolicySys.IsAllowed(policy.Args{
+			AccountName:     cred.AccessKey,
+			Action:          action,
+			BucketName:      bucketName,
+			ConditionValues: getConditionValues(r, locationConstraint),
+			IsOwner:         false,
+			ObjectName:      objectName,
+		}) {
+			return ErrNone
+		}
+		return ErrAccessDenied
+	}
+
+	if globalIAMSys.IsAllowed(iampolicy.Args{
+		AccountName:     cred.AccessKey,
+		Action:          iampolicy.Action(action),
 		BucketName:      bucketName,
-		ConditionValues: getConditionValues(r, locationConstraint),
-		IsOwner:         isOwner,
+		ConditionValues: getConditionValues(r, ""),
 		ObjectName:      objectName,
+		IsOwner:         owner,
+		Claims:          claims,
 	}) {
 		return ErrNone
 	}
-
 	return ErrAccessDenied
 }
 
@@ -209,7 +327,7 @@ func reqSignatureV4Verify(r *http.Request, region string) (s3Error APIErrorCode)
 }
 
 // Verify if request has valid AWS Signature Version '4'.
-func isReqAuthenticated(r *http.Request, region string) (s3Error APIErrorCode) {
+func isReqAuthenticated(ctx context.Context, r *http.Request, region string) (s3Error APIErrorCode) {
 	if errCode := reqSignatureV4Verify(r, region); errCode != ErrNone {
 		return errCode
 	}
@@ -244,9 +362,9 @@ func isReqAuthenticated(r *http.Request, region string) (s3Error APIErrorCode) {
 
 	// Verify 'Content-Md5' and/or 'X-Amz-Content-Sha256' if present.
 	// The verification happens implicit during reading.
-	reader, err := hash.NewReader(r.Body, -1, hex.EncodeToString(contentMD5), hex.EncodeToString(contentSHA256))
+	reader, err := hash.NewReader(r.Body, -1, hex.EncodeToString(contentMD5), hex.EncodeToString(contentSHA256), -1)
 	if err != nil {
-		return toAPIErrorCode(err)
+		return toAPIErrorCode(ctx, err)
 	}
 	r.Body = ioutil.NopCloser(reader)
 	return ErrNone
@@ -288,12 +406,67 @@ func (a authHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	} else if aType == authTypeJWT {
 		// Validate Authorization header if its valid for JWT request.
-		if !isHTTPRequestValid(r) {
+		if _, _, authErr := webRequestAuthenticate(r); authErr != nil {
 			w.WriteHeader(http.StatusUnauthorized)
 			return
 		}
 		a.handler.ServeHTTP(w, r)
 		return
+	} else if aType == authTypeSTS {
+		a.handler.ServeHTTP(w, r)
+		return
 	}
-	writeErrorResponse(w, ErrSignatureVersionNotSupported, r.URL)
+	writeErrorResponse(w, ErrSignatureVersionNotSupported, r.URL, guessIsBrowserReq(r))
+}
+
+// isPutAllowed - check if PUT operation is allowed on the resource, this
+// call verifies bucket policies and IAM policies, supports multi user
+// checks etc.
+func isPutAllowed(atype authType, bucketName, objectName string, r *http.Request) (s3Err APIErrorCode) {
+	var cred auth.Credentials
+	var owner bool
+	switch atype {
+	case authTypeUnknown:
+		return ErrAccessDenied
+	case authTypeSignedV2, authTypePresignedV2:
+		cred, owner, s3Err = getReqAccessKeyV2(r)
+	case authTypeStreamingSigned, authTypePresigned, authTypeSigned:
+		region := globalServerConfig.GetRegion()
+		cred, owner, s3Err = getReqAccessKeyV4(r, region)
+	}
+	if s3Err != ErrNone {
+		return s3Err
+	}
+
+	claims, s3Err := checkClaimsFromToken(r, cred)
+	if s3Err != ErrNone {
+		return s3Err
+	}
+
+	if cred.AccessKey == "" {
+		if globalPolicySys.IsAllowed(policy.Args{
+			AccountName:     cred.AccessKey,
+			Action:          policy.PutObjectAction,
+			BucketName:      bucketName,
+			ConditionValues: getConditionValues(r, ""),
+			IsOwner:         false,
+			ObjectName:      objectName,
+		}) {
+			return ErrNone
+		}
+		return ErrAccessDenied
+	}
+
+	if globalIAMSys.IsAllowed(iampolicy.Args{
+		AccountName:     cred.AccessKey,
+		Action:          policy.PutObjectAction,
+		BucketName:      bucketName,
+		ConditionValues: getConditionValues(r, ""),
+		ObjectName:      objectName,
+		IsOwner:         owner,
+		Claims:          claims,
+	}) {
+		return ErrNone
+	}
+	return ErrAccessDenied
 }

cmd/auth-handler_test.go

@@ -18,6 +18,7 @@ package cmd
 
 import (
 	"bytes"
+	"context"
 	"io"
 	"io/ioutil"
 	"net/http"
@@ -344,11 +345,14 @@ func mustNewSignedBadMD5Request(method string, urlStr string, contentLength int6
 
 // Tests is requested authenticated function, tests replies for s3 errors.
 func TestIsReqAuthenticated(t *testing.T) {
-	path, err := newTestConfig(globalMinioDefaultRegion)
+	objLayer, fsDir, err := prepareFS()
 	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(fsDir)
+	if err = newTestConfig(globalMinioDefaultRegion, objLayer); err != nil {
 		t.Fatalf("unable initialize config file, %s", err)
 	}
-	defer os.RemoveAll(path)
 
 	creds, err := auth.CreateCredentials("myuser", "mypassword")
 	if err != nil {
@@ -374,21 +378,26 @@ func TestIsReqAuthenticated(t *testing.T) {
 		{mustNewSignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrNone},
 	}
 
+	ctx := context.Background()
 	// Validates all testcases.
 	for i, testCase := range testCases {
-		if s3Error := isReqAuthenticated(testCase.req, globalServerConfig.GetRegion()); s3Error != testCase.s3Error {
-			if _, err := ioutil.ReadAll(testCase.req.Body); toAPIErrorCode(err) != testCase.s3Error {
-				t.Fatalf("Test %d: Unexpected S3 error: want %d - got %d (got after reading request %d)", i, testCase.s3Error, s3Error, toAPIErrorCode(err))
+		if s3Error := isReqAuthenticated(ctx, testCase.req, globalServerConfig.GetRegion()); s3Error != testCase.s3Error {
+			if _, err := ioutil.ReadAll(testCase.req.Body); toAPIErrorCode(ctx, err) != testCase.s3Error {
+				t.Fatalf("Test %d: Unexpected S3 error: want %d - got %d (got after reading request %d)", i, testCase.s3Error, s3Error, toAPIErrorCode(ctx, err))
 			}
 		}
 	}
 }
 func TestCheckAdminRequestAuthType(t *testing.T) {
-	path, err := newTestConfig(globalMinioDefaultRegion)
+	objLayer, fsDir, err := prepareFS()
 	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(fsDir)
+
+	if err = newTestConfig(globalMinioDefaultRegion, objLayer); err != nil {
 		t.Fatalf("unable initialize config file, %s", err)
 	}
-	defer os.RemoveAll(path)
 
 	creds, err := auth.CreateCredentials("myuser", "mypassword")
 	if err != nil {
@@ -406,8 +415,9 @@ func TestCheckAdminRequestAuthType(t *testing.T) {
 		{Request: mustNewPresignedV2Request("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: ErrAccessDenied},
 		{Request: mustNewPresignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: ErrAccessDenied},
 	}
+	ctx := context.Background()
 	for i, testCase := range testCases {
-		if s3Error := checkAdminRequestAuthType(testCase.Request, globalServerConfig.GetRegion()); s3Error != testCase.ErrCode {
+		if s3Error := checkAdminRequestAuthType(ctx, testCase.Request, globalServerConfig.GetRegion()); s3Error != testCase.ErrCode {
 			t.Errorf("Test %d: Unexpected s3error returned wanted %d, got %d", i, testCase.ErrCode, s3Error)
 		}
 	}

cmd/benchmark-utils_test.go

@@ -22,7 +22,6 @@ import (
 	"io/ioutil"
 	"math"
 	"math/rand"
-	"os"
 	"strconv"
 	"testing"
 
@@ -62,7 +61,7 @@ func runPutObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 	for i := 0; i < b.N; i++ {
 		// insert the object.
 		objInfo, err := obj.PutObject(context.Background(), bucket, "object"+strconv.Itoa(i),
-			mustGetHashReader(b, bytes.NewBuffer(textData), int64(len(textData)), md5hex, sha256hex), metadata)
+			mustGetPutObjReader(b, bytes.NewBuffer(textData), int64(len(textData)), md5hex, sha256hex), metadata, ObjectOptions{})
 		if err != nil {
 			b.Fatal(err)
 		}
@@ -98,7 +97,8 @@ func runPutObjectPartBenchmark(b *testing.B, obj ObjectLayer, partSize int) {
 	// generate md5sum for the generated data.
 	// md5sum of the data to written is required as input for NewMultipartUpload.
 	metadata := make(map[string]string)
-	uploadID, err = obj.NewMultipartUpload(context.Background(), bucket, object, metadata)
+	opts := ObjectOptions{}
+	uploadID, err = obj.NewMultipartUpload(context.Background(), bucket, object, metadata, opts)
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -123,7 +123,7 @@ func runPutObjectPartBenchmark(b *testing.B, obj ObjectLayer, partSize int) {
 			md5hex = getMD5Hash([]byte(textPartData))
 			var partInfo PartInfo
 			partInfo, err = obj.PutObjectPart(context.Background(), bucket, object, uploadID, j,
-				mustGetHashReader(b, bytes.NewBuffer(textPartData), int64(len(textPartData)), md5hex, sha256hex))
+				mustGetPutObjReader(b, bytes.NewBuffer(textPartData), int64(len(textPartData)), md5hex, sha256hex), opts)
 			if err != nil {
 				b.Fatal(err)
 			}
@@ -138,12 +138,6 @@ func runPutObjectPartBenchmark(b *testing.B, obj ObjectLayer, partSize int) {
 
 // creates XL/FS backend setup, obtains the object layer and calls the runPutObjectPartBenchmark function.
 func benchmarkPutObjectPart(b *testing.B, instanceType string, objSize int) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		b.Fatalf("Unable to initialize config. %s", err)
-	}
-	defer os.RemoveAll(rootPath)
-
 	// create a temp XL/FS backend.
 	objLayer, disks, err := prepareBenchmarkBackend(instanceType)
 	if err != nil {
@@ -151,18 +145,13 @@ func benchmarkPutObjectPart(b *testing.B, instanceType string, objSize int) {
 	}
 	// cleaning up the backend by removing all the directories and files created on function return.
 	defer removeRoots(disks)
+
 	// uses *testing.B and the object Layer to run the benchmark.
 	runPutObjectPartBenchmark(b, objLayer, objSize)
 }
 
 // creates XL/FS backend setup, obtains the object layer and calls the runPutObjectBenchmark function.
 func benchmarkPutObject(b *testing.B, instanceType string, objSize int) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		b.Fatalf("Unable to initialize config. %s", err)
-	}
-	defer os.RemoveAll(rootPath)
-
 	// create a temp XL/FS backend.
 	objLayer, disks, err := prepareBenchmarkBackend(instanceType)
 	if err != nil {
@@ -170,18 +159,13 @@ func benchmarkPutObject(b *testing.B, instanceType string, objSize int) {
 	}
 	// cleaning up the backend by removing all the directories and files created on function return.
 	defer removeRoots(disks)
+
 	// uses *testing.B and the object Layer to run the benchmark.
 	runPutObjectBenchmark(b, objLayer, objSize)
 }
 
 // creates XL/FS backend setup, obtains the object layer and runs parallel benchmark for put object.
 func benchmarkPutObjectParallel(b *testing.B, instanceType string, objSize int) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		b.Fatalf("Unable to initialize config. %s", err)
-	}
-	defer os.RemoveAll(rootPath)
-
 	// create a temp XL/FS backend.
 	objLayer, disks, err := prepareBenchmarkBackend(instanceType)
 	if err != nil {
@@ -189,6 +173,7 @@ func benchmarkPutObjectParallel(b *testing.B, instanceType string, objSize int)
 	}
 	// cleaning up the backend by removing all the directories and files created on function return.
 	defer removeRoots(disks)
+
 	// uses *testing.B and the object Layer to run the benchmark.
 	runPutObjectBenchmarkParallel(b, objLayer, objSize)
 }
@@ -196,16 +181,10 @@ func benchmarkPutObjectParallel(b *testing.B, instanceType string, objSize int)
 // Benchmark utility functions for ObjectLayer.GetObject().
 // Creates Object layer setup ( MakeBucket, PutObject) and then runs the benchmark.
 func runGetObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		b.Fatalf("Unable to initialize config. %s", err)
-	}
-	defer os.RemoveAll(rootPath)
-
 	// obtains random bucket name.
 	bucket := getRandomBucketName()
 	// create bucket.
-	err = obj.MakeBucketWithLocation(context.Background(), bucket, "")
+	err := obj.MakeBucketWithLocation(context.Background(), bucket, "")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -225,7 +204,7 @@ func runGetObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 		// insert the object.
 		var objInfo ObjectInfo
 		objInfo, err = obj.PutObject(context.Background(), bucket, "object"+strconv.Itoa(i),
-			mustGetHashReader(b, bytes.NewBuffer(textData), int64(len(textData)), md5hex, sha256hex), metadata)
+			mustGetPutObjReader(b, bytes.NewBuffer(textData), int64(len(textData)), md5hex, sha256hex), metadata, ObjectOptions{})
 		if err != nil {
 			b.Fatal(err)
 		}
@@ -240,7 +219,7 @@ func runGetObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
 		var buffer = new(bytes.Buffer)
-		err = obj.GetObject(context.Background(), bucket, "object"+strconv.Itoa(i%10), 0, int64(objSize), buffer, "")
+		err = obj.GetObject(context.Background(), bucket, "object"+strconv.Itoa(i%10), 0, int64(objSize), buffer, "", ObjectOptions{})
 		if err != nil {
 			b.Error(err)
 		}
@@ -269,12 +248,6 @@ func generateBytesData(size int) []byte {
 
 // creates XL/FS backend setup, obtains the object layer and calls the runGetObjectBenchmark function.
 func benchmarkGetObject(b *testing.B, instanceType string, objSize int) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		b.Fatalf("Unable to initialize config. %s", err)
-	}
-	defer os.RemoveAll(rootPath)
-
 	// create a temp XL/FS backend.
 	objLayer, disks, err := prepareBenchmarkBackend(instanceType)
 	if err != nil {
@@ -282,18 +255,13 @@ func benchmarkGetObject(b *testing.B, instanceType string, objSize int) {
 	}
 	// cleaning up the backend by removing all the directories and files created.
 	defer removeRoots(disks)
+
 	//  uses *testing.B and the object Layer to run the benchmark.
 	runGetObjectBenchmark(b, objLayer, objSize)
 }
 
 // creates XL/FS backend setup, obtains the object layer and runs parallel benchmark for ObjectLayer.GetObject() .
 func benchmarkGetObjectParallel(b *testing.B, instanceType string, objSize int) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		b.Fatalf("Unable to initialize config. %s", err)
-	}
-	defer os.RemoveAll(rootPath)
-
 	// create a temp XL/FS backend.
 	objLayer, disks, err := prepareBenchmarkBackend(instanceType)
 	if err != nil {
@@ -301,6 +269,7 @@ func benchmarkGetObjectParallel(b *testing.B, instanceType string, objSize int)
 	}
 	// cleaning up the backend by removing all the directories and files created.
 	defer removeRoots(disks)
+
 	//  uses *testing.B and the object Layer to run the benchmark.
 	runGetObjectBenchmarkParallel(b, objLayer, objSize)
 }
@@ -308,16 +277,10 @@ func benchmarkGetObjectParallel(b *testing.B, instanceType string, objSize int)
 // Parallel benchmark utility functions for ObjectLayer.PutObject().
 // Creates Object layer setup ( MakeBucket ) and then runs the PutObject benchmark.
 func runPutObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		b.Fatalf("Unable to initialize config. %s", err)
-	}
-	defer os.RemoveAll(rootPath)
-
 	// obtains random bucket name.
 	bucket := getRandomBucketName()
 	// create bucket.
-	err = obj.MakeBucketWithLocation(context.Background(), bucket, "")
+	err := obj.MakeBucketWithLocation(context.Background(), bucket, "")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -341,7 +304,7 @@ func runPutObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 		for pb.Next() {
 			// insert the object.
 			objInfo, err := obj.PutObject(context.Background(), bucket, "object"+strconv.Itoa(i),
-				mustGetHashReader(b, bytes.NewBuffer(textData), int64(len(textData)), md5hex, sha256hex), metadata)
+				mustGetPutObjReader(b, bytes.NewBuffer(textData), int64(len(textData)), md5hex, sha256hex), metadata, ObjectOptions{})
 			if err != nil {
 				b.Fatal(err)
 			}
@@ -359,16 +322,10 @@ func runPutObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 // Parallel benchmark utility functions for ObjectLayer.GetObject().
 // Creates Object layer setup ( MakeBucket, PutObject) and then runs the benchmark.
 func runGetObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		b.Fatalf("Unable to initialize config. %s", err)
-	}
-	defer os.RemoveAll(rootPath)
-
 	// obtains random bucket name.
 	bucket := getRandomBucketName()
 	// create bucket.
-	err = obj.MakeBucketWithLocation(context.Background(), bucket, "")
+	err := obj.MakeBucketWithLocation(context.Background(), bucket, "")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -387,7 +344,7 @@ func runGetObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 		// insert the object.
 		var objInfo ObjectInfo
 		objInfo, err = obj.PutObject(context.Background(), bucket, "object"+strconv.Itoa(i),
-			mustGetHashReader(b, bytes.NewBuffer(textData), int64(len(textData)), md5hex, sha256hex), metadata)
+			mustGetPutObjReader(b, bytes.NewBuffer(textData), int64(len(textData)), md5hex, sha256hex), metadata, ObjectOptions{})
 		if err != nil {
 			b.Fatal(err)
 		}
@@ -403,7 +360,7 @@ func runGetObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 	b.RunParallel(func(pb *testing.PB) {
 		i := 0
 		for pb.Next() {
-			err = obj.GetObject(context.Background(), bucket, "object"+strconv.Itoa(i), 0, int64(objSize), ioutil.Discard, "")
+			err = obj.GetObject(context.Background(), bucket, "object"+strconv.Itoa(i), 0, int64(objSize), ioutil.Discard, "", ObjectOptions{})
 			if err != nil {
 				b.Error(err)
 			}

cmd/bitrot.go

@@ -0,0 +1,194 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"context"
+	"errors"
+	"hash"
+
+	"github.com/minio/highwayhash"
+	"github.com/minio/minio/cmd/logger"
+	sha256 "github.com/minio/sha256-simd"
+	"golang.org/x/crypto/blake2b"
+)
+
+// magic HH-256 key as HH-256 hash of the first 100 decimals of π as utf-8 string with a zero key.
+var magicHighwayHash256Key = []byte("\x4b\xe7\x34\xfa\x8e\x23\x8a\xcd\x26\x3e\x83\xe6\xbb\x96\x85\x52\x04\x0f\x93\x5d\xa3\x9f\x44\x14\x97\xe0\x9d\x13\x22\xde\x36\xa0")
+
+// BitrotAlgorithm specifies a algorithm used for bitrot protection.
+type BitrotAlgorithm uint
+
+const (
+	// SHA256 represents the SHA-256 hash function
+	SHA256 BitrotAlgorithm = 1 + iota
+	// HighwayHash256 represents the HighwayHash-256 hash function
+	HighwayHash256
+	// BLAKE2b512 represents the BLAKE2b-512 hash function
+	BLAKE2b512
+)
+
+// DefaultBitrotAlgorithm is the default algorithm used for bitrot protection.
+const (
+	DefaultBitrotAlgorithm = HighwayHash256
+)
+
+var bitrotAlgorithms = map[BitrotAlgorithm]string{
+	SHA256:         "sha256",
+	BLAKE2b512:     "blake2b",
+	HighwayHash256: "highwayhash256",
+}
+
+// New returns a new hash.Hash calculating the given bitrot algorithm.
+func (a BitrotAlgorithm) New() hash.Hash {
+	switch a {
+	case SHA256:
+		return sha256.New()
+	case BLAKE2b512:
+		b2, _ := blake2b.New512(nil) // New512 never returns an error if the key is nil
+		return b2
+	case HighwayHash256:
+		hh, _ := highwayhash.New(magicHighwayHash256Key) // New will never return error since key is 256 bit
+		return hh
+	default:
+		logger.CriticalIf(context.Background(), errors.New("Unsupported bitrot algorithm"))
+		return nil
+	}
+}
+
+// Available reports whether the given algorithm is available.
+func (a BitrotAlgorithm) Available() bool {
+	_, ok := bitrotAlgorithms[a]
+	return ok
+}
+
+// String returns the string identifier for a given bitrot algorithm.
+// If the algorithm is not supported String panics.
+func (a BitrotAlgorithm) String() string {
+	name, ok := bitrotAlgorithms[a]
+	if !ok {
+		logger.CriticalIf(context.Background(), errors.New("Unsupported bitrot algorithm"))
+	}
+	return name
+}
+
+// NewBitrotVerifier returns a new BitrotVerifier implementing the given algorithm.
+func NewBitrotVerifier(algorithm BitrotAlgorithm, checksum []byte) *BitrotVerifier {
+	return &BitrotVerifier{algorithm, checksum}
+}
+
+// BitrotVerifier can be used to verify protected data.
+type BitrotVerifier struct {
+	algorithm BitrotAlgorithm
+	sum       []byte
+}
+
+// BitrotAlgorithmFromString returns a bitrot algorithm from the given string representation.
+// It returns 0 if the string representation does not match any supported algorithm.
+// The zero value of a bitrot algorithm is never supported.
+func BitrotAlgorithmFromString(s string) (a BitrotAlgorithm) {
+	for alg, name := range bitrotAlgorithms {
+		if name == s {
+			return alg
+		}
+	}
+	return
+}
+
+// To read bit-rot verified data.
+type bitrotReader struct {
+	disk      StorageAPI
+	volume    string
+	filePath  string
+	verifier  *BitrotVerifier // Holds the bit-rot info
+	endOffset int64           // Affects the length of data requested in disk.ReadFile depending on Read()'s offset
+	buf       []byte          // Holds bit-rot verified data
+}
+
+// newBitrotReader returns bitrotReader.
+// Note that the buffer is allocated later in Read(). This is because we will know the buffer length only
+// during the bitrotReader.Read(). Depending on when parallelReader fails-over, the buffer length can be different.
+func newBitrotReader(disk StorageAPI, volume, filePath string, algo BitrotAlgorithm, endOffset int64, sum []byte) *bitrotReader {
+	return &bitrotReader{
+		disk:      disk,
+		volume:    volume,
+		filePath:  filePath,
+		verifier:  &BitrotVerifier{algo, sum},
+		endOffset: endOffset,
+		buf:       nil,
+	}
+}
+
+// ReadChunk returns requested data.
+func (b *bitrotReader) ReadChunk(offset int64, length int64) ([]byte, error) {
+	if b.buf == nil {
+		b.buf = make([]byte, b.endOffset-offset)
+		if _, err := b.disk.ReadFile(b.volume, b.filePath, offset, b.buf, b.verifier); err != nil {
+			ctx := context.Background()
+			logger.GetReqInfo(ctx).AppendTags("disk", b.disk.String())
+			logger.LogIf(ctx, err)
+			return nil, err
+		}
+	}
+	if int64(len(b.buf)) < length {
+		logger.LogIf(context.Background(), errLessData)
+		return nil, errLessData
+	}
+	retBuf := b.buf[:length]
+	b.buf = b.buf[length:]
+	return retBuf, nil
+}
+
+// To calculate the bit-rot of the written data.
+type bitrotWriter struct {
+	disk     StorageAPI
+	volume   string
+	filePath string
+	h        hash.Hash
+}
+
+// newBitrotWriter returns bitrotWriter.
+func newBitrotWriter(disk StorageAPI, volume, filePath string, algo BitrotAlgorithm) *bitrotWriter {
+	return &bitrotWriter{
+		disk:     disk,
+		volume:   volume,
+		filePath: filePath,
+		h:        algo.New(),
+	}
+}
+
+// Append appends the data and while calculating the hash.
+func (b *bitrotWriter) Append(buf []byte) error {
+	n, err := b.h.Write(buf)
+	if err != nil {
+		return err
+	}
+	if n != len(buf) {
+		logger.LogIf(context.Background(), errUnexpected)
+		return errUnexpected
+	}
+	if err = b.disk.AppendFile(b.volume, b.filePath, buf); err != nil {
+		logger.LogIf(context.Background(), err)
+		return err
+	}
+	return nil
+}
+
+// Sum returns bit-rot sum.
+func (b *bitrotWriter) Sum() []byte {
+	return b.h.Sum(nil)
+}

cmd/bitrot_test.go

@@ -0,0 +1,71 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"io/ioutil"
+	"log"
+	"os"
+	"testing"
+)
+
+func TestBitrotReaderWriter(t *testing.T) {
+	tmpDir, err := ioutil.TempDir("", "")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	volume := "testvol"
+	filePath := "testfile"
+
+	disk, err := newPosix(tmpDir)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	disk.MakeVol(volume)
+
+	writer := newBitrotWriter(disk, volume, filePath, HighwayHash256)
+
+	err = writer.Append([]byte("aaaaaaaaa"))
+	if err != nil {
+		log.Fatal(err)
+	}
+	err = writer.Append([]byte("a"))
+	if err != nil {
+		log.Fatal(err)
+	}
+	err = writer.Append([]byte("aaaaaaaaaa"))
+	if err != nil {
+		log.Fatal(err)
+	}
+	err = writer.Append([]byte("aaaaa"))
+	if err != nil {
+		log.Fatal(err)
+	}
+	err = writer.Append([]byte("aaaaaaaaaa"))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	reader := newBitrotReader(disk, volume, filePath, HighwayHash256, 35, writer.Sum())
+
+	if _, err = reader.ReadChunk(0, 35); err != nil {
+		log.Fatal(err)
+	}
+}

cmd/bool-flag.go

@@ -56,11 +56,12 @@ func (bf *BoolFlag) UnmarshalJSON(data []byte) (err error) {
 
 // ParseBoolFlag - parses string into BoolFlag.
 func ParseBoolFlag(s string) (bf BoolFlag, err error) {
-	if s == "on" {
+	switch s {
+	case "on":
 		bf = true
-	} else if s == "off" {
+	case "off":
 		bf = false
-	} else {
+	default:
 		err = fmt.Errorf("invalid value ‘%s’ for BoolFlag", s)
 	}
 

cmd/bucket-handlers-listobjects.go

@@ -20,6 +20,9 @@ import (
 	"net/http"
 
 	"github.com/gorilla/mux"
+	"github.com/minio/minio/cmd/crypto"
+	"github.com/minio/minio/cmd/logger"
+
 	"github.com/minio/minio/pkg/policy"
 )
 
@@ -54,19 +57,21 @@ func validateListObjectsArgs(prefix, marker, delimiter string, maxKeys int) APIE
 // NOTE: It is recommended that this API to be used for application development.
 // Minio continues to support ListObjectsV1 for supporting legacy tools.
 func (api objectAPIHandlers) ListObjectsV2Handler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "ListObjectsV2")
+	ctx := newContext(r, w, "ListObjectsV2")
+
+	defer logger.AuditLog(w, r, "ListObjectsV2", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.ListBucketAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -76,14 +81,14 @@ func (api objectAPIHandlers) ListObjectsV2Handler(w http.ResponseWriter, r *http
 	prefix, token, startAfter, delimiter, fetchOwner, maxKeys, _, errCode := getListObjectsV2Args(urlValues)
 
 	if errCode != ErrNone {
-		writeErrorResponse(w, errCode, r.URL)
+		writeErrorResponse(w, errCode, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Validate the query params before beginning to serve the request.
 	// fetch-owner is not validated since it is a boolean
 	if s3Error := validateListObjectsArgs(prefix, token, delimiter, maxKeys); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 	listObjectsV2 := objectAPI.ListObjectsV2
@@ -95,15 +100,26 @@ func (api objectAPIHandlers) ListObjectsV2Handler(w http.ResponseWriter, r *http
 	// marshaled into S3 compatible XML header.
 	listObjectsV2Info, err := listObjectsV2(ctx, bucket, prefix, token, delimiter, maxKeys, fetchOwner, startAfter)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	for i := range listObjectsV2Info.Objects {
-		if listObjectsV2Info.Objects[i].IsEncrypted() {
+		var actualSize int64
+		if listObjectsV2Info.Objects[i].IsCompressed() {
+			// Read the decompressed size from the meta.json.
+			actualSize = listObjectsV2Info.Objects[i].GetActualSize()
+			if actualSize < 0 {
+				writeErrorResponse(w, ErrInvalidDecompressedSize, r.URL, guessIsBrowserReq(r))
+				return
+			}
+			// Set the info.Size to the actualSize.
+			listObjectsV2Info.Objects[i].Size = actualSize
+		} else if crypto.IsEncrypted(listObjectsV2Info.Objects[i].UserDefined) {
+			listObjectsV2Info.Objects[i].ETag = getDecryptedETag(r.Header, listObjectsV2Info.Objects[i], false)
 			listObjectsV2Info.Objects[i].Size, err = listObjectsV2Info.Objects[i].DecryptedSize()
 			if err != nil {
-				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 				return
 			}
 		}
@@ -123,33 +139,39 @@ func (api objectAPIHandlers) ListObjectsV2Handler(w http.ResponseWriter, r *http
 // criteria to return a subset of the objects in a bucket.
 //
 func (api objectAPIHandlers) ListObjectsV1Handler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "ListObjectsV1")
+	ctx := newContext(r, w, "ListObjectsV1")
+
+	defer logger.AuditLog(w, r, "ListObjectsV1", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.ListBucketAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Extract all the litsObjectsV1 query params to their native values.
-	prefix, marker, delimiter, maxKeys, _ := getListObjectsV1Args(r.URL.Query())
+	prefix, marker, delimiter, maxKeys, _, s3Error := getListObjectsV1Args(r.URL.Query())
+	if s3Error != ErrNone {
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
+		return
+	}
 
 	// Validate the maxKeys lowerbound. When maxKeys > 1000, S3 returns 1000 but
 	// does not throw an error.
 	if maxKeys < 0 {
-		writeErrorResponse(w, ErrInvalidMaxKeys, r.URL)
+		writeErrorResponse(w, ErrInvalidMaxKeys, r.URL, guessIsBrowserReq(r))
 		return
 	} // Validate all the query params before beginning to serve the request.
 	if s3Error := validateListObjectsArgs(prefix, marker, delimiter, maxKeys); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 	listObjects := objectAPI.ListObjects
@@ -161,20 +183,30 @@ func (api objectAPIHandlers) ListObjectsV1Handler(w http.ResponseWriter, r *http
 	// marshaled into S3 compatible XML header.
 	listObjectsInfo, err := listObjects(ctx, bucket, prefix, marker, delimiter, maxKeys)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	for i := range listObjectsInfo.Objects {
-		if listObjectsInfo.Objects[i].IsEncrypted() {
+		var actualSize int64
+		if listObjectsInfo.Objects[i].IsCompressed() {
+			// Read the decompressed size from the meta.json.
+			actualSize = listObjectsInfo.Objects[i].GetActualSize()
+			if actualSize < 0 {
+				writeErrorResponse(w, ErrInvalidDecompressedSize, r.URL, guessIsBrowserReq(r))
+				return
+			}
+			// Set the info.Size to the actualSize.
+			listObjectsInfo.Objects[i].Size = actualSize
+		} else if crypto.IsEncrypted(listObjectsInfo.Objects[i].UserDefined) {
+			listObjectsInfo.Objects[i].ETag = getDecryptedETag(r.Header, listObjectsInfo.Objects[i], false)
 			listObjectsInfo.Objects[i].Size, err = listObjectsInfo.Objects[i].DecryptedSize()
 			if err != nil {
-				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 				return
 			}
 		}
 	}
-
 	response := generateListObjectsV1Response(bucket, prefix, marker, delimiter, maxKeys, listObjectsInfo)
 
 	// Write success response.

cmd/bucket-handlers.go

@@ -28,11 +28,11 @@ import (
 	"path"
 	"path/filepath"
 	"strings"
-	"sync"
 
 	"github.com/gorilla/mux"
 
 	"github.com/minio/minio-go/pkg/set"
+	"github.com/minio/minio/cmd/crypto"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/dns"
 	"github.com/minio/minio/pkg/event"
@@ -87,34 +87,30 @@ func initFederatorBackend(objLayer ObjectLayer) {
 // -------------------------
 // This operation returns bucket location.
 func (api objectAPIHandlers) GetBucketLocationHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "GetBucketLocation")
+	ctx := newContext(r, w, "GetBucketLocation")
+
+	defer logger.AuditLog(w, r, "GetBucketLocation", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketLocationAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
-	bucketLock := globalNSMutex.NewNSLock(bucket, "")
-	if err := bucketLock.GetRLock(globalObjectTimeout); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
-		return
-	}
-	defer bucketLock.RUnlock()
 	getBucketInfo := objectAPI.GetBucketInfo
 	if api.CacheAPI() != nil {
 		getBucketInfo = api.CacheAPI().GetBucketInfo
 	}
 	if _, err := getBucketInfo(ctx, bucket); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -141,38 +137,44 @@ func (api objectAPIHandlers) GetBucketLocationHandler(w http.ResponseWriter, r *
 // uploads in the response.
 //
 func (api objectAPIHandlers) ListMultipartUploadsHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "ListMultipartUploads")
+	ctx := newContext(r, w, "ListMultipartUploads")
+
+	defer logger.AuditLog(w, r, "ListMultipartUploads", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.ListBucketMultipartUploadsAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
-	prefix, keyMarker, uploadIDMarker, delimiter, maxUploads, _ := getBucketMultipartResources(r.URL.Query())
+	prefix, keyMarker, uploadIDMarker, delimiter, maxUploads, _, s3Error := getBucketMultipartResources(r.URL.Query())
+	if s3Error != ErrNone {
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
+		return
+	}
 	if maxUploads < 0 {
-		writeErrorResponse(w, ErrInvalidMaxUploads, r.URL)
+		writeErrorResponse(w, ErrInvalidMaxUploads, r.URL, guessIsBrowserReq(r))
 		return
 	}
 	if keyMarker != "" {
 		// Marker not common with prefix is not implemented.
 		if !hasPrefix(keyMarker, prefix) {
-			writeErrorResponse(w, ErrNotImplemented, r.URL)
+			writeErrorResponse(w, ErrNotImplemented, r.URL, guessIsBrowserReq(r))
 			return
 		}
 	}
 
 	listMultipartsInfo, err := objectAPI.ListMultipartUploads(ctx, bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploads)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 	// generate response
@@ -188,11 +190,13 @@ func (api objectAPIHandlers) ListMultipartUploadsHandler(w http.ResponseWriter,
 // This implementation of the GET operation returns a list of all buckets
 // owned by the authenticated sender of the request.
 func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "ListBuckets")
+	ctx := newContext(r, w, "ListBuckets")
+
+	defer logger.AuditLog(w, r, "ListBuckets", mustGetClaimsFromToken(r))
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 	listBuckets := objectAPI.ListBuckets
@@ -202,7 +206,7 @@ func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.R
 	}
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.ListAllMyBucketsAction, "", ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 	// If etcd, dns federation configured list buckets from etcd.
@@ -210,7 +214,7 @@ func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.R
 	if globalDNSConfig != nil {
 		dnsBuckets, err := globalDNSConfig.List()
 		if err != nil && err != dns.ErrNoEntriesFound {
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 			return
 		}
 		bucketSet := set.NewStringSet()
@@ -229,7 +233,7 @@ func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.R
 		var err error
 		bucketsInfo, err = listBuckets(ctx)
 		if err != nil {
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 			return
 		}
 	}
@@ -244,14 +248,16 @@ func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.R
 
 // DeleteMultipleObjectsHandler - deletes multiple objects.
 func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "DeleteMultipleObjects")
+	ctx := newContext(r, w, "DeleteMultipleObjects")
+
+	defer logger.AuditLog(w, r, "DeleteMultipleObjects", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -260,7 +266,7 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 		// In the event access is denied, a 200 response should still be returned
 		// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
 		if s3Error != ErrAccessDenied {
-			writeErrorResponse(w, s3Error, r.URL)
+			writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 			return
 		}
 	}
@@ -268,14 +274,14 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 	// Content-Length is required and should be non-zero
 	// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
 	if r.ContentLength <= 0 {
-		writeErrorResponse(w, ErrMissingContentLength, r.URL)
+		writeErrorResponse(w, ErrMissingContentLength, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Content-Md5 is requied should be set
 	// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
 	if _, ok := r.Header["Content-Md5"]; !ok {
-		writeErrorResponse(w, ErrMissingContentMD5, r.URL)
+		writeErrorResponse(w, ErrMissingContentMD5, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -291,7 +297,7 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 	// Read incoming body XML bytes.
 	if _, err := io.ReadFull(r.Body, deleteXMLBytes); err != nil {
 		logger.LogIf(ctx, err)
-		writeErrorResponse(w, ErrInternalError, r.URL)
+		writeErrorResponse(w, ErrInternalError, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -299,7 +305,7 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 	deleteObjects := &DeleteObjectsRequest{}
 	if err := xml.Unmarshal(deleteXMLBytes, deleteObjects); err != nil {
 		logger.LogIf(ctx, err)
-		writeErrorResponse(w, ErrMalformedXML, r.URL)
+		writeErrorResponse(w, ErrMalformedXML, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -307,38 +313,28 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 	if globalWORMEnabled {
 		// Not required to check whether given objects exist or not, because
 		// DeleteMultipleObject is always successful irrespective of object existence.
-		writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
+		writeErrorResponse(w, ErrMethodNotAllowed, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
-	var wg = &sync.WaitGroup{} // Allocate a new wait group.
-	var dErrs = make([]error, len(deleteObjects.Objects))
-
-	// Delete all requested objects in parallel.
-	for index, object := range deleteObjects.Objects {
-		wg.Add(1)
-		go func(i int, obj ObjectIdentifier) {
-			defer wg.Done()
-			// If the request is denied access, each item
-			// should be marked as 'AccessDenied'
-			if s3Error == ErrAccessDenied {
-				dErrs[i] = PrefixAccessDenied{
-					Bucket: bucket,
-					Object: obj.ObjectName,
-				}
-				return
-			}
-			deleteObject := objectAPI.DeleteObject
-			if api.CacheAPI() != nil {
-				deleteObject = api.CacheAPI().DeleteObject
-			}
-			dErr := deleteObject(ctx, bucket, obj.ObjectName)
-			if dErr != nil {
-				dErrs[i] = dErr
-			}
-		}(index, object)
+	deleteObject := objectAPI.DeleteObject
+	if api.CacheAPI() != nil {
+		deleteObject = api.CacheAPI().DeleteObject
+	}
+
+	var dErrs = make([]error, len(deleteObjects.Objects))
+	for index, object := range deleteObjects.Objects {
+		// If the request is denied access, each item
+		// should be marked as 'AccessDenied'
+		if s3Error == ErrAccessDenied {
+			dErrs[index] = PrefixAccessDenied{
+				Bucket: bucket,
+				Object: object.ObjectName,
+			}
+			continue
+		}
+		dErrs[index] = deleteObject(ctx, bucket, object.ObjectName)
 	}
-	wg.Wait()
 
 	// Collect deleted objects and errors if any.
 	var deletedObjects []ObjectIdentifier
@@ -358,8 +354,8 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 		}
 		// Error during delete should be collected separately.
 		deleteErrors = append(deleteErrors, DeleteError{
-			Code:    errorCodeResponse[toAPIErrorCode(err)].Code,
-			Message: errorCodeResponse[toAPIErrorCode(err)].Description,
+			Code:    errorCodeResponse[toAPIErrorCode(ctx, err)].Code,
+			Message: errorCodeResponse[toAPIErrorCode(ctx, err)].Description,
 			Key:     object.ObjectName,
 		})
 	}
@@ -386,10 +382,11 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 			Object: ObjectInfo{
 				Name: dobj.ObjectName,
 			},
-			ReqParams: extractReqParams(r),
-			UserAgent: r.UserAgent(),
-			Host:      host,
-			Port:      port,
+			ReqParams:    extractReqParams(r),
+			RespElements: extractRespElements(w),
+			UserAgent:    r.UserAgent(),
+			Host:         host,
+			Port:         port,
 		})
 	}
 }
@@ -398,11 +395,13 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 // ----------
 // This implementation of the PUT operation creates a new bucket for authenticated request
 func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "PutBucket")
+	ctx := newContext(r, w, "PutBucket")
+
+	defer logger.AuditLog(w, r, "PutBucket", mustGetClaimsFromToken(r))
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -410,21 +409,21 @@ func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Req
 	bucket := vars["bucket"]
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.CreateBucketAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Parse incoming location constraint.
 	location, s3Error := parseLocationConstraint(r)
 	if s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Validate if location sent by the client is valid, reject
 	// requests which do not follow valid region requirements.
 	if !isValidLocation(location) {
-		writeErrorResponse(w, ErrInvalidRegion, r.URL)
+		writeErrorResponse(w, ErrInvalidRegion, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -433,12 +432,12 @@ func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Req
 			if err == dns.ErrNoEntriesFound {
 				// Proceed to creating a bucket.
 				if err = objectAPI.MakeBucketWithLocation(ctx, bucket, location); err != nil {
-					writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+					writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 					return
 				}
 				if err = globalDNSConfig.Put(bucket); err != nil {
 					objectAPI.DeleteBucket(ctx, bucket)
-					writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+					writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 					return
 				}
 
@@ -448,18 +447,18 @@ func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Req
 				writeSuccessResponseHeadersOnly(w)
 				return
 			}
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 			return
 
 		}
-		writeErrorResponse(w, ErrBucketAlreadyOwnedByYou, r.URL)
+		writeErrorResponse(w, ErrBucketAlreadyOwnedByYou, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Proceed to creating a bucket.
 	err := objectAPI.MakeBucketWithLocation(ctx, bucket, location)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -474,30 +473,39 @@ func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Req
 // This implementation of the POST operation handles object creation with a specified
 // signature policy in multipart/form-data
 func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "PostPolicyBucket")
+	ctx := newContext(r, w, "PostPolicyBucket")
+
+	defer logger.AuditLog(w, r, "PostPolicyBucket", mustGetClaimsFromToken(r))
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
+		return
+	}
+	if crypto.S3KMS.IsRequested(r.Header) { // SSE-KMS is not supported
+		writeErrorResponse(w, ErrNotImplemented, r.URL, guessIsBrowserReq(r))
+		return
+	}
+	if !objectAPI.IsEncryptionSupported() && hasServerSideEncryptionHeader(r.Header) {
+		writeErrorResponse(w, ErrNotImplemented, r.URL, guessIsBrowserReq(r))
 		return
 	}
-
 	bucket := mux.Vars(r)["bucket"]
 
 	// Require Content-Length to be set in the request
 	size := r.ContentLength
 	if size < 0 {
-		writeErrorResponse(w, ErrMissingContentLength, r.URL)
+		writeErrorResponse(w, ErrMissingContentLength, r.URL, guessIsBrowserReq(r))
 		return
 	}
 	resource, err := getResource(r.URL.Path, r.Host, globalDomainName)
 	if err != nil {
-		writeErrorResponse(w, ErrInvalidRequest, r.URL)
+		writeErrorResponse(w, ErrInvalidRequest, r.URL, guessIsBrowserReq(r))
 		return
 	}
 	// Make sure that the URL  does not contain object name.
 	if bucket != filepath.Clean(resource[1:]) {
-		writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
+		writeErrorResponse(w, ErrMethodNotAllowed, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -506,7 +514,7 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 	reader, err := r.MultipartReader()
 	if err != nil {
 		logger.LogIf(ctx, err)
-		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
+		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -514,7 +522,7 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 	form, err := reader.ReadForm(maxFormMemory)
 	if err != nil {
 		logger.LogIf(ctx, err)
-		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
+		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -525,13 +533,13 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 	fileBody, fileName, fileSize, formValues, err := extractPostPolicyFormValues(ctx, form)
 	if err != nil {
 		logger.LogIf(ctx, err)
-		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
+		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Check if file is provided, error out otherwise.
 	if fileBody == nil {
-		writeErrorResponse(w, ErrPOSTFileRequired, r.URL)
+		writeErrorResponse(w, ErrPOSTFileRequired, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -553,7 +561,7 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 	if successRedirect != "" {
 		redirectURL, err = url.Parse(successRedirect)
 		if err != nil {
-			writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
+			writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL, guessIsBrowserReq(r))
 			return
 		}
 	}
@@ -561,84 +569,96 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 	// Verify policy signature.
 	apiErr := doesPolicySignatureMatch(formValues)
 	if apiErr != ErrNone {
-		writeErrorResponse(w, apiErr, r.URL)
+		writeErrorResponse(w, apiErr, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	policyBytes, err := base64.StdEncoding.DecodeString(formValues.Get("Policy"))
 	if err != nil {
-		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
+		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
-	postPolicyForm, err := parsePostPolicyForm(string(policyBytes))
-	if err != nil {
-		writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
-		return
-	}
-
-	// Make sure formValues adhere to policy restrictions.
-	if apiErr = checkPostPolicy(formValues, postPolicyForm); apiErr != ErrNone {
-		writeErrorResponse(w, apiErr, r.URL)
-		return
-	}
-
-	// Ensure that the object size is within expected range, also the file size
-	// should not exceed the maximum single Put size (5 GiB)
-	lengthRange := postPolicyForm.Conditions.ContentLengthRange
-	if lengthRange.Valid {
-		if fileSize < lengthRange.Min {
-			writeErrorResponse(w, toAPIErrorCode(errDataTooSmall), r.URL)
+	// Handle policy if it is set.
+	if len(policyBytes) > 0 {
+		postPolicyForm, err := parsePostPolicyForm(string(policyBytes))
+		if err != nil {
+			writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL, guessIsBrowserReq(r))
 			return
 		}
 
-		if fileSize > lengthRange.Max || isMaxObjectSize(fileSize) {
-			writeErrorResponse(w, toAPIErrorCode(errDataTooLarge), r.URL)
+		// Make sure formValues adhere to policy restrictions.
+		if apiErr = checkPostPolicy(formValues, postPolicyForm); apiErr != ErrNone {
+			writeErrorResponse(w, apiErr, r.URL, guessIsBrowserReq(r))
 			return
 		}
+
+		// Ensure that the object size is within expected range, also the file size
+		// should not exceed the maximum single Put size (5 GiB)
+		lengthRange := postPolicyForm.Conditions.ContentLengthRange
+		if lengthRange.Valid {
+			if fileSize < lengthRange.Min {
+				writeErrorResponse(w, toAPIErrorCode(ctx, errDataTooSmall), r.URL, guessIsBrowserReq(r))
+				return
+			}
+
+			if fileSize > lengthRange.Max || isMaxObjectSize(fileSize) {
+				writeErrorResponse(w, toAPIErrorCode(ctx, errDataTooLarge), r.URL, guessIsBrowserReq(r))
+				return
+			}
+		}
 	}
 
 	// Extract metadata to be saved from received Form.
 	metadata := make(map[string]string)
 	err = extractMetadataFromMap(ctx, formValues, metadata)
 	if err != nil {
-		writeErrorResponse(w, ErrInternalError, r.URL)
+		writeErrorResponse(w, ErrInternalError, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
-	hashReader, err := hash.NewReader(fileBody, fileSize, "", "")
+	hashReader, err := hash.NewReader(fileBody, fileSize, "", "", fileSize)
 	if err != nil {
 		logger.LogIf(ctx, err)
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
+	rawReader := hashReader
+	pReader := NewPutObjReader(rawReader, nil, nil)
+	var objectEncryptionKey []byte
 
+	if globalAutoEncryption && !crypto.SSEC.IsRequested(r.Header) {
+		r.Header.Add(crypto.SSEHeader, crypto.SSEAlgorithmAES256)
+	}
 	if objectAPI.IsEncryptionSupported() {
-		if hasSSECustomerHeader(formValues) && !hasSuffix(object, slashSeparator) { // handle SSE-C requests
+		if hasServerSideEncryptionHeader(formValues) && !hasSuffix(object, slashSeparator) { // handle SSE-C and SSE-S3 requests
 			var reader io.Reader
 			var key []byte
-			key, err = ParseSSECustomerHeader(formValues)
-			if err != nil {
-				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
-				return
+			if crypto.SSEC.IsRequested(formValues) {
+				key, err = ParseSSECustomerHeader(formValues)
+				if err != nil {
+					writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
+					return
+				}
 			}
-			reader, err = newEncryptReader(hashReader, key, bucket, object, metadata)
+			reader, objectEncryptionKey, err = newEncryptReader(hashReader, key, bucket, object, metadata, crypto.S3.IsRequested(formValues))
 			if err != nil {
-				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 				return
 			}
 			info := ObjectInfo{Size: fileSize}
-			hashReader, err = hash.NewReader(reader, info.EncryptedSize(), "", "") // do not try to verify encrypted content
+			hashReader, err = hash.NewReader(reader, info.EncryptedSize(), "", "", fileSize) // do not try to verify encrypted content
 			if err != nil {
-				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 				return
 			}
+			pReader = NewPutObjReader(rawReader, hashReader, objectEncryptionKey)
 		}
 	}
 
-	objInfo, err := objectAPI.PutObject(ctx, bucket, object, hashReader, metadata)
+	objInfo, err := objectAPI.PutObject(ctx, bucket, object, pReader, metadata, ObjectOptions{})
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -654,13 +674,14 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 
 	// Notify object created event.
 	defer sendEvent(eventArgs{
-		EventName:  event.ObjectCreatedPost,
-		BucketName: objInfo.Bucket,
-		Object:     objInfo,
-		ReqParams:  extractReqParams(r),
-		UserAgent:  r.UserAgent(),
-		Host:       host,
-		Port:       port,
+		EventName:    event.ObjectCreatedPost,
+		BucketName:   objInfo.Bucket,
+		Object:       objInfo,
+		ReqParams:    extractReqParams(r),
+		RespElements: extractRespElements(w),
+		UserAgent:    r.UserAgent(),
+		Host:         host,
+		Port:         port,
 	})
 
 	if successRedirect != "" {
@@ -694,7 +715,9 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 // have permission to access it. Otherwise, the operation might
 // return responses such as 404 Not Found and 403 Forbidden.
 func (api objectAPIHandlers) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "HeadBucket")
+	ctx := newContext(r, w, "HeadBucket")
+
+	defer logger.AuditLog(w, r, "HeadBucket", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
@@ -715,7 +738,7 @@ func (api objectAPIHandlers) HeadBucketHandler(w http.ResponseWriter, r *http.Re
 		getBucketInfo = api.CacheAPI().GetBucketInfo
 	}
 	if _, err := getBucketInfo(ctx, bucket); err != nil {
-		writeErrorResponseHeadersOnly(w, toAPIErrorCode(err))
+		writeErrorResponseHeadersOnly(w, toAPIErrorCode(ctx, err))
 		return
 	}
 
@@ -724,19 +747,21 @@ func (api objectAPIHandlers) HeadBucketHandler(w http.ResponseWriter, r *http.Re
 
 // DeleteBucketHandler - Delete bucket
 func (api objectAPIHandlers) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "DeleteBucket")
+	ctx := newContext(r, w, "DeleteBucket")
+
+	defer logger.AuditLog(w, r, "DeleteBucket", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.DeleteBucketAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -746,7 +771,7 @@ func (api objectAPIHandlers) DeleteBucketHandler(w http.ResponseWriter, r *http.
 	}
 	// Attempt to delete bucket.
 	if err := deleteBucket(ctx, bucket); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -758,7 +783,7 @@ func (api objectAPIHandlers) DeleteBucketHandler(w http.ResponseWriter, r *http.
 		if err := globalDNSConfig.Delete(bucket); err != nil {
 			// Deleting DNS entry failed, attempt to create the bucket again.
 			objectAPI.MakeBucketWithLocation(ctx, bucket, "")
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 			return
 		}
 	}

cmd/bucket-handlers_test.go

@@ -84,7 +84,7 @@ func testGetBucketLocationHandler(obj ObjectLayer, instanceType, bucketName stri
 		// initialize httptest Recorder, this records any mutations to response writer inside the handler.
 		rec := httptest.NewRecorder()
 		// construct HTTP request for Get bucket location.
-		req, err := newTestSignedRequestV4("GET", getBucketLocationURL("", testCase.bucketName), 0, nil, testCase.accessKey, testCase.secretKey)
+		req, err := newTestSignedRequestV4("GET", getBucketLocationURL("", testCase.bucketName), 0, nil, testCase.accessKey, testCase.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for GetBucketLocationHandler: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -116,7 +116,7 @@ func testGetBucketLocationHandler(obj ObjectLayer, instanceType, bucketName stri
 		// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
 		recV2 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
-		reqV2, err := newTestSignedRequestV2("GET", getBucketLocationURL("", testCase.bucketName), 0, nil, testCase.accessKey, testCase.secretKey)
+		reqV2, err := newTestSignedRequestV2("GET", getBucketLocationURL("", testCase.bucketName), 0, nil, testCase.accessKey, testCase.secretKey, nil)
 
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, instanceType, err)
@@ -220,7 +220,7 @@ func testHeadBucketHandler(obj ObjectLayer, instanceType, bucketName string, api
 		// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
 		rec := httptest.NewRecorder()
 		// construct HTTP request for HEAD bucket.
-		req, err := newTestSignedRequestV4("HEAD", getHEADBucketURL("", testCase.bucketName), 0, nil, testCase.accessKey, testCase.secretKey)
+		req, err := newTestSignedRequestV4("HEAD", getHEADBucketURL("", testCase.bucketName), 0, nil, testCase.accessKey, testCase.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for HeadBucketHandler: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -235,7 +235,7 @@ func testHeadBucketHandler(obj ObjectLayer, instanceType, bucketName string, api
 		// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
 		recV2 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
-		reqV2, err := newTestSignedRequestV2("HEAD", getHEADBucketURL("", testCase.bucketName), 0, nil, testCase.accessKey, testCase.secretKey)
+		reqV2, err := newTestSignedRequestV2("HEAD", getHEADBucketURL("", testCase.bucketName), 0, nil, testCase.accessKey, testCase.secretKey, nil)
 
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, instanceType, err)
@@ -437,7 +437,7 @@ func testListMultipartUploadsHandler(obj ObjectLayer, instanceType, bucketName s
 
 		// construct HTTP request for List multipart uploads endpoint.
 		u := getListMultipartUploadsURLWithParams("", testCase.bucket, testCase.prefix, testCase.keyMarker, testCase.uploadIDMarker, testCase.delimiter, testCase.maxUploads)
-		req, gerr := newTestSignedRequestV4("GET", u, 0, nil, testCase.accessKey, testCase.secretKey)
+		req, gerr := newTestSignedRequestV4("GET", u, 0, nil, testCase.accessKey, testCase.secretKey, nil)
 		if gerr != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for ListMultipartUploadsHandler: <ERROR> %v", i+1, instanceType, gerr)
 		}
@@ -454,7 +454,7 @@ func testListMultipartUploadsHandler(obj ObjectLayer, instanceType, bucketName s
 		// construct HTTP request for PUT bucket policy endpoint.
 
 		// verify response for V2 signed HTTP request.
-		reqV2, err := newTestSignedRequestV2("GET", u, 0, nil, testCase.accessKey, testCase.secretKey)
+		reqV2, err := newTestSignedRequestV2("GET", u, 0, nil, testCase.accessKey, testCase.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -471,7 +471,7 @@ func testListMultipartUploadsHandler(obj ObjectLayer, instanceType, bucketName s
 
 	// construct HTTP request for List multipart uploads endpoint.
 	u := getListMultipartUploadsURLWithParams("", bucketName, "", "", "", "", "")
-	req, err := newTestSignedRequestV4("GET", u, 0, nil, "", "") // Generate an anonymous request.
+	req, err := newTestSignedRequestV4("GET", u, 0, nil, "", "", nil) // Generate an anonymous request.
 	if err != nil {
 		t.Fatalf("Test %s: Failed to create HTTP request for ListMultipartUploadsHandler: <ERROR> %v", instanceType, err)
 	}
@@ -551,7 +551,7 @@ func testListBucketsHandler(obj ObjectLayer, instanceType, bucketName string, ap
 	for i, testCase := range testCases {
 		// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
 		rec := httptest.NewRecorder()
-		req, lerr := newTestSignedRequestV4("GET", getListBucketURL(""), 0, nil, testCase.accessKey, testCase.secretKey)
+		req, lerr := newTestSignedRequestV4("GET", getListBucketURL(""), 0, nil, testCase.accessKey, testCase.secretKey, nil)
 		if lerr != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for ListBucketsHandler: <ERROR> %v", i+1, instanceType, lerr)
 		}
@@ -568,7 +568,7 @@ func testListBucketsHandler(obj ObjectLayer, instanceType, bucketName string, ap
 		// construct HTTP request for PUT bucket policy endpoint.
 
 		// verify response for V2 signed HTTP request.
-		reqV2, err := newTestSignedRequestV2("GET", getListBucketURL(""), 0, nil, testCase.accessKey, testCase.secretKey)
+		reqV2, err := newTestSignedRequestV2("GET", getListBucketURL(""), 0, nil, testCase.accessKey, testCase.secretKey, nil)
 
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, instanceType, err)
@@ -625,7 +625,7 @@ func testAPIDeleteMultipleObjectsHandler(obj ObjectLayer, instanceType, bucketNa
 	for i := 0; i < 10; i++ {
 		objectName := "test-object-" + strconv.Itoa(i)
 		// uploading the object.
-		_, err = obj.PutObject(context.Background(), bucketName, objectName, mustGetHashReader(t, bytes.NewBuffer(contentBytes), int64(len(contentBytes)), "", sha256sum), nil)
+		_, err = obj.PutObject(context.Background(), bucketName, objectName, mustGetPutObjReader(t, bytes.NewBuffer(contentBytes), int64(len(contentBytes)), "", sha256sum), nil, ObjectOptions{})
 		// if object upload fails stop the test.
 		if err != nil {
 			t.Fatalf("Put Object %d:  Error uploading object: <ERROR> %v", i, err)
@@ -745,7 +745,7 @@ func testAPIDeleteMultipleObjectsHandler(obj ObjectLayer, instanceType, bucketNa
 		// Generate a signed or anonymous request based on the testCase
 		if testCase.accessKey != "" {
 			req, err = newTestSignedRequestV4("POST", getDeleteMultipleObjectsURL("", bucketName),
-				int64(len(testCase.objects)), bytes.NewReader(testCase.objects), testCase.accessKey, testCase.secretKey)
+				int64(len(testCase.objects)), bytes.NewReader(testCase.objects), testCase.accessKey, testCase.secretKey, nil)
 		} else {
 			req, err = newTestRequest("POST", getDeleteMultipleObjectsURL("", bucketName),
 				int64(len(testCase.objects)), bytes.NewReader(testCase.objects))
@@ -785,7 +785,7 @@ func testAPIDeleteMultipleObjectsHandler(obj ObjectLayer, instanceType, bucketNa
 	nilBucket := "dummy-bucket"
 	nilObject := ""
 
-	nilReq, err := newTestSignedRequestV4("POST", getDeleteMultipleObjectsURL("", nilBucket), 0, nil, "", "")
+	nilReq, err := newTestSignedRequestV4("POST", getDeleteMultipleObjectsURL("", nilBucket), 0, nil, "", "", nil)
 	if err != nil {
 		t.Errorf("Minio %s: Failed to create HTTP request for testing the response when object Layer is set to `nil`.", instanceType)
 	}

cmd/bucket-notification-handlers.go

@@ -42,30 +42,32 @@ var errNoSuchNotifications = errors.New("The specified bucket does not have buck
 // as per http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html.
 // It returns empty configuration if its not set.
 func (api objectAPIHandlers) GetBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "GetBucketNotification")
+	ctx := newContext(r, w, "GetBucketNotification")
+
+	defer logger.AuditLog(w, r, "GetBucketNotification", mustGetClaimsFromToken(r))
 
 	vars := mux.Vars(r)
 	bucketName := vars["bucket"]
 
 	objAPI := api.ObjectAPI()
 	if objAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if !objAPI.IsNotificationSupported() {
-		writeErrorResponse(w, ErrNotImplemented, r.URL)
+		writeErrorResponse(w, ErrNotImplemented, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketNotificationAction, bucketName, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	_, err := objAPI.GetBucketInfo(ctx, bucketName)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -74,17 +76,21 @@ func (api objectAPIHandlers) GetBucketNotificationHandler(w http.ResponseWriter,
 	if err != nil {
 		// Ignore errNoSuchNotifications to comply with AWS S3.
 		if err != errNoSuchNotifications {
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 			return
 		}
 
 		nConfig = &event.Config{}
 	}
 
+	// If xml namespace is empty, set a default value before returning.
+	if nConfig.XMLNS == "" {
+		nConfig.XMLNS = "http://s3.amazonaws.com/doc/2006-03-01/"
+	}
+
 	notificationBytes, err := xml.Marshal(nConfig)
 	if err != nil {
-		logger.LogIf(ctx, err)
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -94,16 +100,18 @@ func (api objectAPIHandlers) GetBucketNotificationHandler(w http.ResponseWriter,
 // PutBucketNotificationHandler - This HTTP handler stores given notification configuration as per
 // http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html.
 func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "PutBucketNotification")
+	ctx := newContext(r, w, "PutBucketNotification")
+
+	defer logger.AuditLog(w, r, "PutBucketNotification", mustGetClaimsFromToken(r))
 
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if !objectAPI.IsNotificationSupported() {
-		writeErrorResponse(w, ErrNotImplemented, r.URL)
+		writeErrorResponse(w, ErrNotImplemented, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -111,19 +119,19 @@ func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter,
 	bucketName := vars["bucket"]
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketNotificationAction, bucketName, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	_, err := objectAPI.GetBucketInfo(ctx, bucketName)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// PutBucketNotification always needs a Content-Length.
 	if r.ContentLength <= 0 {
-		writeErrorResponse(w, ErrMissingContentLength, r.URL)
+		writeErrorResponse(w, ErrMissingContentLength, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -132,15 +140,15 @@ func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter,
 	if err != nil {
 		apiErr := ErrMalformedXML
 		if event.IsEventError(err) {
-			apiErr = toAPIErrorCode(err)
+			apiErr = toAPIErrorCode(ctx, err)
 		}
 
-		writeErrorResponse(w, apiErr, r.URL)
+		writeErrorResponse(w, apiErr, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
-	if err = saveNotificationConfig(objectAPI, bucketName, config); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+	if err = saveNotificationConfig(ctx, objectAPI, bucketName, config); err != nil {
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -154,24 +162,30 @@ func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter,
 // ListenBucketNotificationHandler - This HTTP handler sends events to the connected HTTP client.
 // Client should send prefix/suffix object name to match and events to watch as query parameters.
 func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "ListenBucketNotification")
+	ctx := newContext(r, w, "ListenBucketNotification")
+
+	defer logger.AuditLog(w, r, "ListenBucketNotification", mustGetClaimsFromToken(r))
 
 	// Validate if bucket exists.
 	objAPI := api.ObjectAPI()
 	if objAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 	if !objAPI.IsNotificationSupported() {
-		writeErrorResponse(w, ErrNotImplemented, r.URL)
+		writeErrorResponse(w, ErrNotImplemented, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
+	if !objAPI.IsListenBucketSupported() {
+		writeErrorResponse(w, ErrNotImplemented, r.URL, guessIsBrowserReq(r))
+		return
+	}
 	vars := mux.Vars(r)
 	bucketName := vars["bucket"]
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.ListenBucketNotificationAction, bucketName, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -179,11 +193,11 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 
 	var prefix string
 	if len(values["prefix"]) > 1 {
-		writeErrorResponse(w, ErrFilterNamePrefix, r.URL)
+		writeErrorResponse(w, ErrFilterNamePrefix, r.URL, guessIsBrowserReq(r))
 	}
 	if len(values["prefix"]) == 1 {
 		if err := event.ValidateFilterRuleValue(values["prefix"][0]); err != nil {
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 			return
 		}
 
@@ -192,11 +206,11 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 
 	var suffix string
 	if len(values["suffix"]) > 1 {
-		writeErrorResponse(w, ErrFilterNameSuffix, r.URL)
+		writeErrorResponse(w, ErrFilterNameSuffix, r.URL, guessIsBrowserReq(r))
 	}
 	if len(values["suffix"]) == 1 {
 		if err := event.ValidateFilterRuleValue(values["suffix"][0]); err != nil {
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 			return
 		}
 
@@ -209,7 +223,7 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 	for _, s := range values["events"] {
 		eventName, err := event.ParseName(s)
 		if err != nil {
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 			return
 		}
 
@@ -217,28 +231,27 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 	}
 
 	if _, err := objAPI.GetBucketInfo(ctx, bucketName); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	host, err := xnet.ParseHost(r.RemoteAddr)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	target, err := target.NewHTTPClientTarget(*host, w)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	rulesMap := event.NewRulesMap(eventNames, pattern, target.ID())
 
-	if err := globalNotificationSys.AddRemoteTarget(bucketName, target, rulesMap); err != nil {
+	if err = globalNotificationSys.AddRemoteTarget(bucketName, target, rulesMap); err != nil {
 		logger.GetReqInfo(ctx).AppendTags("target", target.ID().Name)
-		logger.LogIf(ctx, err)
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 	defer globalNotificationSys.RemoveRemoteTarget(bucketName, target.ID())
@@ -246,14 +259,13 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 
 	thisAddr, err := xnet.ParseHost(GetLocalPeer(globalEndpoints))
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if err = SaveListener(objAPI, bucketName, eventNames, pattern, target.ID(), *thisAddr); err != nil {
 		logger.GetReqInfo(ctx).AppendTags("target", target.ID().Name)
-		logger.LogIf(ctx, err)
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -263,8 +275,7 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 
 	if err = RemoveListener(objAPI, bucketName, target.ID(), *thisAddr); err != nil {
 		logger.GetReqInfo(ctx).AppendTags("target", target.ID().Name)
-		logger.LogIf(ctx, err)
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 }

cmd/bucket-policy-handlers.go

@@ -38,11 +38,13 @@ const (
 // PutBucketPolicyHandler - This HTTP handler stores given bucket policy configuration as per
 // https://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
 func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "PutBucketPolicy")
+	ctx := newContext(r, w, "PutBucketPolicy")
+
+	defer logger.AuditLog(w, r, "PutBucketPolicy", mustGetClaimsFromToken(r))
 
 	objAPI := api.ObjectAPI()
 	if objAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -50,43 +52,43 @@ func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *ht
 	bucket := vars["bucket"]
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketPolicyAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Check if bucket exists.
 	if _, err := objAPI.GetBucketInfo(ctx, bucket); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Error out if Content-Length is missing.
 	// PutBucketPolicy always needs Content-Length.
 	if r.ContentLength <= 0 {
-		writeErrorResponse(w, ErrMissingContentLength, r.URL)
+		writeErrorResponse(w, ErrMissingContentLength, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Error out if Content-Length is beyond allowed size.
 	if r.ContentLength > maxBucketPolicySize {
-		writeErrorResponse(w, ErrEntityTooLarge, r.URL)
+		writeErrorResponse(w, ErrEntityTooLarge, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	bucketPolicy, err := policy.ParseConfig(io.LimitReader(r.Body, r.ContentLength), bucket)
 	if err != nil {
-		writeErrorResponse(w, ErrMalformedPolicy, r.URL)
+		writeErrorResponse(w, ErrMalformedPolicy, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Version in policy must not be empty
 	if bucketPolicy.Version == "" {
-		writeErrorResponse(w, ErrMalformedPolicy, r.URL)
+		writeErrorResponse(w, ErrMalformedPolicy, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if err = objAPI.SetBucketPolicy(ctx, bucket, bucketPolicy); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -99,11 +101,13 @@ func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *ht
 
 // DeleteBucketPolicyHandler - This HTTP handler removes bucket policy configuration.
 func (api objectAPIHandlers) DeleteBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "DeleteBucketPolicy")
+	ctx := newContext(r, w, "DeleteBucketPolicy")
+
+	defer logger.AuditLog(w, r, "DeleteBucketPolicy", mustGetClaimsFromToken(r))
 
 	objAPI := api.ObjectAPI()
 	if objAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -111,18 +115,18 @@ func (api objectAPIHandlers) DeleteBucketPolicyHandler(w http.ResponseWriter, r
 	bucket := vars["bucket"]
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.DeleteBucketPolicyAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Check if bucket exists.
 	if _, err := objAPI.GetBucketInfo(ctx, bucket); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	if err := objAPI.DeleteBucketPolicy(ctx, bucket); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -135,11 +139,13 @@ func (api objectAPIHandlers) DeleteBucketPolicyHandler(w http.ResponseWriter, r
 
 // GetBucketPolicyHandler - This HTTP handler returns bucket policy configuration.
 func (api objectAPIHandlers) GetBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
-	ctx := newContext(r, "GetBucketPolicy")
+	ctx := newContext(r, w, "GetBucketPolicy")
+
+	defer logger.AuditLog(w, r, "GetBucketPolicy", mustGetClaimsFromToken(r))
 
 	objAPI := api.ObjectAPI()
 	if objAPI == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
@@ -147,27 +153,26 @@ func (api objectAPIHandlers) GetBucketPolicyHandler(w http.ResponseWriter, r *ht
 	bucket := vars["bucket"]
 
 	if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
-		writeErrorResponse(w, s3Error, r.URL)
+		writeErrorResponse(w, s3Error, r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Check if bucket exists.
 	if _, err := objAPI.GetBucketInfo(ctx, bucket); err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	// Read bucket access policy.
 	bucketPolicy, err := objAPI.GetBucketPolicy(ctx, bucket)
 	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 
 	policyData, err := json.Marshal(bucketPolicy)
 	if err != nil {
-		logger.LogIf(ctx, err)
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		writeErrorResponse(w, toAPIErrorCode(ctx, err), r.URL, guessIsBrowserReq(r))
 		return
 	}
 

cmd/bucket-policy-handlers_test.go

@@ -254,7 +254,7 @@ func testPutBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 		recV4 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
 		reqV4, err := newTestSignedRequestV4("PUT", getPutPolicyURL("", testCase.bucketName),
-			int64(testCase.policyLen), testCase.bucketPolicyReader, testCase.accessKey, testCase.secretKey)
+			int64(testCase.policyLen), testCase.bucketPolicyReader, testCase.accessKey, testCase.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -268,7 +268,7 @@ func testPutBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 		recV2 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
 		reqV2, err := newTestSignedRequestV2("PUT", getPutPolicyURL("", testCase.bucketName),
-			int64(testCase.policyLen), testCase.bucketPolicyReader, testCase.accessKey, testCase.secretKey)
+			int64(testCase.policyLen), testCase.bucketPolicyReader, testCase.accessKey, testCase.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: %s: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, instanceType, err)
 		}
@@ -304,7 +304,7 @@ func testPutBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 	nilBucket := "dummy-bucket"
 
 	nilReq, err := newTestSignedRequestV4("PUT", getPutPolicyURL("", nilBucket),
-		0, nil, "", "")
+		0, nil, "", "", nil)
 
 	if err != nil {
 		t.Errorf("Minio %s: Failed to create HTTP request for testing the response when object Layer is set to `nil`.", instanceType)
@@ -346,7 +346,7 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 		recV4 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
 		reqV4, err := newTestSignedRequestV4("PUT", getPutPolicyURL("", testPolicy.bucketName),
-			int64(len(bucketPolicyStr)), bytes.NewReader([]byte(bucketPolicyStr)), testPolicy.accessKey, testPolicy.secretKey)
+			int64(len(bucketPolicyStr)), bytes.NewReader([]byte(bucketPolicyStr)), testPolicy.accessKey, testPolicy.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, err)
 		}
@@ -360,7 +360,7 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 		recV2 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
 		reqV2, err := newTestSignedRequestV2("PUT", getPutPolicyURL("", testPolicy.bucketName),
-			int64(len(bucketPolicyStr)), bytes.NewReader([]byte(bucketPolicyStr)), testPolicy.accessKey, testPolicy.secretKey)
+			int64(len(bucketPolicyStr)), bytes.NewReader([]byte(bucketPolicyStr)), testPolicy.accessKey, testPolicy.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, err)
 		}
@@ -417,7 +417,7 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 		recV4 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
 		reqV4, err := newTestSignedRequestV4("GET", getGetPolicyURL("", testCase.bucketName),
-			0, nil, testCase.accessKey, testCase.secretKey)
+			0, nil, testCase.accessKey, testCase.secretKey, nil)
 
 		if err != nil {
 			t.Fatalf("Test %d: Failed to create HTTP request for GetBucketPolicyHandler: <ERROR> %v", i+1, err)
@@ -437,11 +437,13 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 
 		if recV4.Code != testCase.expectedRespStatus {
 			// Verify whether the bucket policy fetched is same as the one inserted.
-			expectedPolicy, err := policy.ParseConfig(strings.NewReader(expectedBucketPolicyStr), testCase.bucketName)
+			var expectedPolicy *policy.Policy
+			expectedPolicy, err = policy.ParseConfig(strings.NewReader(expectedBucketPolicyStr), testCase.bucketName)
 			if err != nil {
 				t.Fatalf("unexpected error. %v", err)
 			}
-			gotPolicy, err := policy.ParseConfig(bytes.NewReader(bucketPolicyReadBuf), testCase.bucketName)
+			var gotPolicy *policy.Policy
+			gotPolicy, err = policy.ParseConfig(bytes.NewReader(bucketPolicyReadBuf), testCase.bucketName)
 			if err != nil {
 				t.Fatalf("unexpected error. %v", err)
 			}
@@ -454,7 +456,7 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 		recV2 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
 		reqV2, err := newTestSignedRequestV2("GET", getGetPolicyURL("", testCase.bucketName),
-			0, nil, testCase.accessKey, testCase.secretKey)
+			0, nil, testCase.accessKey, testCase.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: Failed to create HTTP request for GetBucketPolicyHandler: <ERROR> %v", i+1, err)
 		}
@@ -509,7 +511,7 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 	nilBucket := "dummy-bucket"
 
 	nilReq, err := newTestSignedRequestV4("GET", getGetPolicyURL("", nilBucket),
-		0, nil, "", "")
+		0, nil, "", "", nil)
 
 	if err != nil {
 		t.Errorf("Minio %s: Failed to create HTTP request for testing the response when object Layer is set to `nil`.", instanceType)
@@ -589,7 +591,7 @@ func testDeleteBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName str
 		recV4 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
 		reqV4, err := newTestSignedRequestV4("PUT", getPutPolicyURL("", testPolicy.bucketName),
-			int64(len(bucketPolicyStr)), bytes.NewReader([]byte(bucketPolicyStr)), testPolicy.accessKey, testPolicy.secretKey)
+			int64(len(bucketPolicyStr)), bytes.NewReader([]byte(bucketPolicyStr)), testPolicy.accessKey, testPolicy.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, err)
 		}
@@ -639,7 +641,7 @@ func testDeleteBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName str
 		recV4 := httptest.NewRecorder()
 		// construct HTTP request for Delete bucket policy endpoint.
 		reqV4, err := newTestSignedRequestV4("DELETE", getDeletePolicyURL("", testCase.bucketName),
-			0, nil, testCase.accessKey, testCase.secretKey)
+			0, nil, testCase.accessKey, testCase.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: Failed to create HTTP request for GetBucketPolicyHandler: <ERROR> %v", i+1, err)
 		}
@@ -661,7 +663,7 @@ func testDeleteBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName str
 		recV2 := httptest.NewRecorder()
 		// construct HTTP request for PUT bucket policy endpoint.
 		reqV2, err := newTestSignedRequestV2("PUT", getPutPolicyURL("", testPolicy.bucketName),
-			int64(len(bucketPolicyStr)), bytes.NewReader([]byte(bucketPolicyStr)), testPolicy.accessKey, testPolicy.secretKey)
+			int64(len(bucketPolicyStr)), bytes.NewReader([]byte(bucketPolicyStr)), testPolicy.accessKey, testPolicy.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: Failed to create HTTP request for PutBucketPolicyHandler: <ERROR> %v", i+1, err)
 		}
@@ -678,7 +680,7 @@ func testDeleteBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName str
 		recV2 := httptest.NewRecorder()
 		// construct HTTP request for Delete bucket policy endpoint.
 		reqV2, err := newTestSignedRequestV2("DELETE", getDeletePolicyURL("", testCase.bucketName),
-			0, nil, testCase.accessKey, testCase.secretKey)
+			0, nil, testCase.accessKey, testCase.secretKey, nil)
 		if err != nil {
 			t.Fatalf("Test %d: Failed to create HTTP request for GetBucketPolicyHandler: <ERROR> %v", i+1, err)
 		}
@@ -712,7 +714,7 @@ func testDeleteBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName str
 	nilBucket := "dummy-bucket"
 
 	nilReq, err := newTestSignedRequestV4("DELETE", getDeletePolicyURL("", nilBucket),
-		0, nil, "", "")
+		0, nil, "", "", nil)
 
 	if err != nil {
 		t.Errorf("Minio %s: Failed to create HTTP request for testing the response when object Layer is set to `nil`.", instanceType)

cmd/certs.go

@@ -71,9 +71,13 @@ func getRootCAs(certsCAsDir string) (*x509.CertPool, error) {
 	// Get all CA file names.
 	var caFiles []string
 	fis, err := readDir(certsCAsDir)
-	if err != nil {
+	if err != nil && err != errFileNotFound {
 		return nil, err
 	}
+	// Return success if CA's directory is missing.
+	if err == errFileNotFound {
+		return nil, nil
+	}
 	for _, fi := range fis {
 		// Skip all directories.
 		if hasSuffix(fi, slashSeparator) {
@@ -150,24 +154,20 @@ func loadX509KeyPair(certFile, keyFile string) (tls.Certificate, error) {
 	return cert, nil
 }
 
-func getSSLConfig() (x509Certs []*x509.Certificate, rootCAs *x509.CertPool, c *certs.Certs, secureConn bool, err error) {
+func getTLSConfig() (x509Certs []*x509.Certificate, c *certs.Certs, secureConn bool, err error) {
 	if !(isFile(getPublicCertFile()) && isFile(getPrivateKeyFile())) {
-		return nil, nil, nil, false, nil
+		return nil, nil, false, nil
 	}
 
 	if x509Certs, err = parsePublicCertFile(getPublicCertFile()); err != nil {
-		return nil, nil, nil, false, err
+		return nil, nil, false, err
 	}
 
 	c, err = certs.New(getPublicCertFile(), getPrivateKeyFile(), loadX509KeyPair)
 	if err != nil {
-		return nil, nil, nil, false, err
-	}
-
-	if rootCAs, err = getRootCAs(getCADir()); err != nil {
-		return nil, nil, nil, false, err
+		return nil, nil, false, err
 	}
 
 	secureConn = true
-	return x509Certs, rootCAs, c, secureConn, nil
+	return x509Certs, c, secureConn, nil
 }

cmd/certs_test.go

@@ -223,7 +223,8 @@ func TestGetRootCAs(t *testing.T) {
 		certCAsDir  string
 		expectedErr error
 	}{
-		{"nonexistent-dir", errFileNotFound},
+		// ignores non-existent directories.
+		{"nonexistent-dir", nil},
 		// Ignores directories.
 		{dir1, nil},
 		// Ignore empty directory.

cmd/common-main.go

@@ -17,7 +17,7 @@
 package cmd
 
 import (
-	"context"
+	"crypto/tls"
 	"errors"
 	"net"
 	"os"
@@ -27,13 +27,15 @@ import (
 	"time"
 
 	etcd "github.com/coreos/etcd/clientv3"
-
+	dns2 "github.com/miekg/dns"
 	"github.com/minio/cli"
+	"github.com/minio/minio-go/pkg/set"
 	"github.com/minio/minio/cmd/logger"
+	"github.com/minio/minio/cmd/logger/target/console"
+	"github.com/minio/minio/cmd/logger/target/http"
 	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/dns"
-
-	"github.com/minio/minio-go/pkg/set"
+	xnet "github.com/minio/minio/pkg/net"
 )
 
 // Check for updates and print a notification message
@@ -48,46 +50,67 @@ func checkUpdate(mode string) {
 	}
 }
 
-// Initialize and load config from remote etcd or local config directory
-func initConfig() {
-	if globalEtcdClient != nil {
-		ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
-		resp, err := globalEtcdClient.Get(ctx, getConfigFile())
-		cancel()
-		// This means there are no entries in etcd with config file
-		// So create a new config
-		if err == nil && resp.Count == 0 {
-			logger.FatalIf(newConfig(), "Unable to initialize minio config for the first time.")
-			logger.Info("Created minio configuration file successfully at %v", globalEtcdClient.Endpoints())
-		} else {
-			// This means there is an entry in etcd, update it if required and proceed
-			if err == nil && resp.Count > 0 {
-				logger.FatalIf(migrateConfig(), "Config migration failed.")
-				logger.FatalIf(loadConfig(), "Unable to load config version: '%s'.", serverConfigVersion)
-			} else {
-				logger.FatalIf(err, "Unable to load config version: '%s'.", serverConfigVersion)
-			}
-		}
-		return
+// Load logger targets based on user's configuration
+func loadLoggers() {
+	auditEndpoint, ok := os.LookupEnv("MINIO_AUDIT_LOGGER_HTTP_ENDPOINT")
+	if ok {
+		// Enable audit HTTP logging through ENV.
+		logger.AddAuditTarget(http.New(auditEndpoint, NewCustomHTTPTransport()))
 	}
 
-	if isFile(getConfigFile()) {
-		logger.FatalIf(migrateConfig(), "Config migration failed")
-		logger.FatalIf(loadConfig(), "Unable to load the configuration file")
+	loggerEndpoint, ok := os.LookupEnv("MINIO_LOGGER_HTTP_ENDPOINT")
+	if ok {
+		// Enable HTTP logging through ENV.
+		logger.AddTarget(http.New(loggerEndpoint, NewCustomHTTPTransport()))
 	} else {
-		// Config file does not exist, we create it fresh and return upon success.
-		logger.FatalIf(newConfig(), "Unable to initialize minio config for the first time")
-		logger.Info("Created minio configuration file successfully at " + getConfigDir())
+		for _, l := range globalServerConfig.Logger.HTTP {
+			if l.Enabled {
+				// Enable http logging
+				logger.AddTarget(http.New(l.Endpoint, NewCustomHTTPTransport()))
+			}
+		}
 	}
+
+	if globalServerConfig.Logger.Console.Enabled {
+		// Enable console logging
+		logger.AddTarget(console.New())
+	}
+
 }
 
 func handleCommonCmdArgs(ctx *cli.Context) {
 
+	// Get "json" flag from command line argument and
+	// enable json and quite modes if jason flag is turned on.
+	globalCLIContext.JSON = ctx.IsSet("json") || ctx.GlobalIsSet("json")
+	if globalCLIContext.JSON {
+		logger.EnableJSON()
+	}
+
+	// Get quiet flag from command line argument.
+	globalCLIContext.Quiet = ctx.IsSet("quiet") || ctx.GlobalIsSet("quiet")
+	if globalCLIContext.Quiet {
+		logger.EnableQuiet()
+	}
+
+	// Get anonymous flag from command line argument.
+	globalCLIContext.Anonymous = ctx.IsSet("anonymous") || ctx.GlobalIsSet("anonymous")
+	if globalCLIContext.Anonymous {
+		logger.EnableAnonymous()
+	}
+
+	// Fetch address option
+	globalCLIContext.Addr = ctx.GlobalString("address")
+	if globalCLIContext.Addr == "" || globalCLIContext.Addr == ":"+globalMinioDefaultPort {
+		globalCLIContext.Addr = ctx.String("address")
+	}
+
 	var configDir string
 
-	if ctx.IsSet("config-dir") {
+	switch {
+	case ctx.IsSet("config-dir"):
 		configDir = ctx.String("config-dir")
-	} else if ctx.GlobalIsSet("config-dir") {
+	case ctx.GlobalIsSet("config-dir"):
 		configDir = ctx.GlobalString("config-dir")
 		// cli package does not expose parent's "config-dir" option.  Below code is workaround.
 		if configDir == "" || configDir == getConfigDir() {
@@ -95,7 +118,7 @@ func handleCommonCmdArgs(ctx *cli.Context) {
 				configDir = ctx.Parent().GlobalString("config-dir")
 			}
 		}
-	} else {
+	default:
 		// Neither local nor global config-dir option is provided.  In this case, try to use
 		// default config directory.
 		configDir = getConfigDir()
@@ -114,10 +137,23 @@ func handleCommonCmdArgs(ctx *cli.Context) {
 	setConfigDir(configDirAbs)
 }
 
+// Parses the given compression exclude list `extensions` or `content-types`.
+func parseCompressIncludes(includes []string) ([]string, error) {
+	for _, e := range includes {
+		if len(e) == 0 {
+			return nil, uiErrInvalidCompressionIncludesValue(nil).Msg("extension/mime-type (%s) cannot be empty", e)
+		}
+	}
+	return includes, nil
+}
+
 func handleCommonEnvVars() {
+	compressEnvDelimiter := ","
 	// Start profiler if env is set.
 	if profiler := os.Getenv("_MINIO_PROFILER"); profiler != "" {
-		globalProfiler = startProfiler(profiler)
+		var err error
+		globalProfiler, err = startProfiler(profiler, "")
+		logger.FatalIf(err, "Unable to setup a profiler")
 	}
 
 	accessKey := os.Getenv("MINIO_ACCESS_KEY")
@@ -127,6 +163,7 @@ func handleCommonEnvVars() {
 		if err != nil {
 			logger.Fatal(uiErrInvalidCredentials(err), "Unable to validate credentials inherited from the shell environment")
 		}
+		cred.Expiration = timeSentinel
 
 		// credential Envs are set globally.
 		globalIsEnvCreds = true
@@ -136,7 +173,7 @@ func handleCommonEnvVars() {
 	if browser := os.Getenv("MINIO_BROWSER"); browser != "" {
 		browserFlag, err := ParseBoolFlag(browser)
 		if err != nil {
-			logger.Fatal(uiErrInvalidBrowserValue(nil).Msg("Unknown value `%s`", browser), "Unable to validate MINIO_BROWSER environment variable")
+			logger.Fatal(uiErrInvalidBrowserValue(nil).Msg("Unknown value `%s`", browser), "Invalid MINIO_BROWSER value in environment variable")
 		}
 
 		// browser Envs are set globally, this does not represent
@@ -155,28 +192,81 @@ func handleCommonEnvVars() {
 	etcdEndpointsEnv, ok := os.LookupEnv("MINIO_ETCD_ENDPOINTS")
 	if ok {
 		etcdEndpoints := strings.Split(etcdEndpointsEnv, ",")
+
+		var etcdSecure bool
+		for _, endpoint := range etcdEndpoints {
+			u, err := xnet.ParseURL(endpoint)
+			if err != nil {
+				logger.FatalIf(err, "Unable to initialize etcd with %s", etcdEndpoints)
+			}
+			// If one of the endpoint is https, we will use https directly.
+			etcdSecure = etcdSecure || u.Scheme == "https"
+		}
+
 		var err error
-		globalEtcdClient, err = etcd.New(etcd.Config{
-			Endpoints:         etcdEndpoints,
-			DialTimeout:       defaultDialTimeout,
-			DialKeepAliveTime: defaultDialKeepAlive,
-		})
+		if etcdSecure {
+			// This is only to support client side certificate authentication
+			// https://coreos.com/etcd/docs/latest/op-guide/security.html
+			etcdClientCertFile, ok1 := os.LookupEnv("MINIO_ETCD_CLIENT_CERT")
+			etcdClientCertKey, ok2 := os.LookupEnv("MINIO_ETCD_CLIENT_CERT_KEY")
+			var getClientCertificate func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
+			if ok1 && ok2 {
+				getClientCertificate = func(unused *tls.CertificateRequestInfo) (*tls.Certificate, error) {
+					cert, terr := tls.LoadX509KeyPair(etcdClientCertFile, etcdClientCertKey)
+					return &cert, terr
+				}
+			}
+			globalEtcdClient, err = etcd.New(etcd.Config{
+				Endpoints:         etcdEndpoints,
+				DialTimeout:       defaultDialTimeout,
+				DialKeepAliveTime: defaultDialKeepAlive,
+				TLS: &tls.Config{
+					RootCAs:              globalRootCAs,
+					GetClientCertificate: getClientCertificate,
+				},
+			})
+		} else {
+			globalEtcdClient, err = etcd.New(etcd.Config{
+				Endpoints:         etcdEndpoints,
+				DialTimeout:       defaultDialTimeout,
+				DialKeepAliveTime: defaultDialKeepAlive,
+			})
+		}
 		logger.FatalIf(err, "Unable to initialize etcd with %s", etcdEndpoints)
 	}
 
 	globalDomainName, globalIsEnvDomainName = os.LookupEnv("MINIO_DOMAIN")
+	if globalDomainName != "" {
+		if _, ok = dns2.IsDomainName(globalDomainName); !ok {
+			logger.Fatal(uiErrInvalidDomainValue(nil).Msg("Unknown value `%s`", globalDomainName), "Invalid MINIO_DOMAIN value in environment variable")
+		}
+	}
 
 	minioEndpointsEnv, ok := os.LookupEnv("MINIO_PUBLIC_IPS")
 	if ok {
 		minioEndpoints := strings.Split(minioEndpointsEnv, ",")
-		globalDomainIPs = set.NewStringSet()
-		for i, ip := range minioEndpoints {
-			if net.ParseIP(ip) == nil {
-				logger.FatalIf(errInvalidArgument, "Unable to initialize Minio server with invalid MINIO_PUBLIC_IPS[%d]: %s", i, ip)
+		var domainIPs = set.NewStringSet()
+		for _, endpoint := range minioEndpoints {
+			if net.ParseIP(endpoint) == nil {
+				// Checking if the IP is a DNS entry.
+				addrs, err := net.LookupHost(endpoint)
+				if err != nil {
+					logger.FatalIf(err, "Unable to initialize Minio server with [%s] invalid entry found in MINIO_PUBLIC_IPS", endpoint)
+				}
+				for _, addr := range addrs {
+					domainIPs.Add(addr)
+				}
+				continue
 			}
-			globalDomainIPs.Add(ip)
+			domainIPs.Add(endpoint)
 		}
+		updateDomainIPs(domainIPs)
+	} else {
+		// Add found interfaces IP address to global domain IPS,
+		// loopback addresses will be naturally dropped.
+		updateDomainIPs(localIP4)
 	}
+
 	if globalDomainName != "" && !globalDomainIPs.IsEmpty() && globalEtcdClient != nil {
 		var err error
 		globalDNSConfig, err = dns.NewCoreDNS(globalDomainName, globalDomainIPs, globalMinioPort, globalEtcdClient)
@@ -257,7 +347,7 @@ func handleCommonEnvVars() {
 	if worm := os.Getenv("MINIO_WORM"); worm != "" {
 		wormFlag, err := ParseBoolFlag(worm)
 		if err != nil {
-			logger.Fatal(uiErrInvalidWormValue(nil).Msg("Unknown value `%s`", worm), "Unable to validate MINIO_WORM environment variable")
+			logger.Fatal(uiErrInvalidWormValue(nil).Msg("Unknown value `%s`", worm), "Invalid MINIO_WORM value in environment variable")
 		}
 
 		// worm Envs are set globally, this does not represent
@@ -265,4 +355,28 @@ func handleCommonEnvVars() {
 		globalIsEnvWORM = true
 		globalWORMEnabled = bool(wormFlag)
 	}
+
+	if compress := os.Getenv("MINIO_COMPRESS"); compress != "" {
+		globalIsCompressionEnabled = strings.EqualFold(compress, "true")
+	}
+
+	compressExtensions := os.Getenv("MINIO_COMPRESS_EXTENSIONS")
+	compressMimeTypes := os.Getenv("MINIO_COMPRESS_MIMETYPES")
+	if compressExtensions != "" || compressMimeTypes != "" {
+		globalIsEnvCompression = true
+		if compressExtensions != "" {
+			extensions, err := parseCompressIncludes(strings.Split(compressExtensions, compressEnvDelimiter))
+			if err != nil {
+				logger.Fatal(err, "Invalid MINIO_COMPRESS_EXTENSIONS value (`%s`)", extensions)
+			}
+			globalCompressExtensions = extensions
+		}
+		if compressMimeTypes != "" {
+			contenttypes, err := parseCompressIncludes(strings.Split(compressMimeTypes, compressEnvDelimiter))
+			if err != nil {
+				logger.Fatal(err, "Invalid MINIO_COMPRESS_MIMETYPES value (`%s`)", contenttypes)
+			}
+			globalCompressMimeTypes = contenttypes
+		}
+	}
 }

cmd/config-common.go

@@ -0,0 +1,133 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"bytes"
+	"context"
+	"errors"
+
+	etcd "github.com/coreos/etcd/clientv3"
+	"github.com/minio/minio/cmd/logger"
+	"github.com/minio/minio/pkg/hash"
+)
+
+var errConfigNotFound = errors.New("config file not found")
+
+func readConfig(ctx context.Context, objAPI ObjectLayer, configFile string) ([]byte, error) {
+	var buffer bytes.Buffer
+	// Read entire content by setting size to -1
+	if err := objAPI.GetObject(ctx, minioMetaBucket, configFile, 0, -1, &buffer, "", ObjectOptions{}); err != nil {
+		// Treat object not found as config not found.
+		if isErrObjectNotFound(err) {
+			return nil, errConfigNotFound
+		}
+
+		logger.GetReqInfo(ctx).AppendTags("configFile", configFile)
+		logger.LogIf(ctx, err)
+		return nil, err
+	}
+
+	// Return config not found on empty content.
+	if buffer.Len() == 0 {
+		return nil, errConfigNotFound
+	}
+
+	return buffer.Bytes(), nil
+}
+
+func deleteConfigEtcd(ctx context.Context, client *etcd.Client, configFile string) error {
+	_, err := client.Delete(ctx, configFile)
+	return err
+}
+
+func deleteConfig(ctx context.Context, objAPI ObjectLayer, configFile string) error {
+	return objAPI.DeleteObject(ctx, minioMetaBucket, configFile)
+}
+
+func saveConfigEtcd(ctx context.Context, client *etcd.Client, configFile string, data []byte) error {
+	_, err := client.Put(ctx, configFile, string(data))
+	return err
+}
+
+func saveConfig(ctx context.Context, objAPI ObjectLayer, configFile string, data []byte) error {
+	hashReader, err := hash.NewReader(bytes.NewReader(data), int64(len(data)), "", getSHA256Hash(data), int64(len(data)))
+	if err != nil {
+		return err
+	}
+
+	_, err = objAPI.PutObject(ctx, minioMetaBucket, configFile, NewPutObjReader(hashReader, nil, nil), nil, ObjectOptions{})
+	return err
+}
+
+func readConfigEtcd(ctx context.Context, client *etcd.Client, configFile string) ([]byte, error) {
+	resp, err := client.Get(ctx, configFile)
+	if err != nil {
+		return nil, err
+	}
+	if resp.Count == 0 {
+		return nil, errConfigNotFound
+	}
+	for _, ev := range resp.Kvs {
+		if string(ev.Key) == configFile {
+			return ev.Value, nil
+		}
+	}
+	return nil, errConfigNotFound
+}
+
+// watchConfig - watches for changes on `configFile` on etcd and loads them.
+func watchConfig(objAPI ObjectLayer, configFile string, loadCfgFn func(ObjectLayer) error) {
+	if globalEtcdClient != nil {
+		for watchResp := range globalEtcdClient.Watch(context.Background(), configFile) {
+			for _, event := range watchResp.Events {
+				if event.IsModify() || event.IsCreate() {
+					loadCfgFn(objAPI)
+				}
+			}
+		}
+	}
+}
+
+func checkConfigEtcd(ctx context.Context, client *etcd.Client, configFile string) error {
+	resp, err := globalEtcdClient.Get(ctx, configFile)
+	if err != nil {
+		return err
+	}
+	if resp.Count == 0 {
+		return errConfigNotFound
+	}
+	return nil
+}
+
+func checkConfig(ctx context.Context, objAPI ObjectLayer, configFile string) error {
+	if globalEtcdClient != nil {
+		return checkConfigEtcd(ctx, globalEtcdClient, configFile)
+	}
+
+	if _, err := objAPI.GetObjectInfo(ctx, minioMetaBucket, configFile, ObjectOptions{}); err != nil {
+		// Treat object not found as config not found.
+		if isErrObjectNotFound(err) {
+			return errConfigNotFound
+		}
+
+		logger.GetReqInfo(ctx).AppendTags("configFile", configFile)
+		logger.LogIf(ctx, err)
+		return err
+	}
+	return nil
+}

cmd/config-current.go

@@ -20,15 +20,18 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"os"
 	"reflect"
 	"sync"
 
+	"github.com/minio/minio/cmd/crypto"
 	"github.com/minio/minio/cmd/logger"
-
 	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/event"
 	"github.com/minio/minio/pkg/event/target"
-	"github.com/minio/minio/pkg/quick"
+	"github.com/minio/minio/pkg/iam/policy"
+	"github.com/minio/minio/pkg/iam/validator"
+	xnet "github.com/minio/minio/pkg/net"
 )
 
 // Steps to move from version N to version N+1
@@ -40,9 +43,9 @@ import (
 // 6. Make changes in config-current_test.go for any test change
 
 // Config version
-const serverConfigVersion = "26"
+const serverConfigVersion = "33"
 
-type serverConfig = serverConfigV26
+type serverConfig = serverConfigV33
 
 var (
 	// globalServerConfig server config.
@@ -63,11 +66,21 @@ func (s *serverConfig) SetRegion(region string) {
 
 // GetRegion get current region.
 func (s *serverConfig) GetRegion() string {
+	if globalIsEnvRegion {
+		return globalServerRegion
+	}
+	if s == nil {
+		return ""
+	}
 	return s.Region
 }
 
 // SetCredential sets new credential and returns the previous credential.
 func (s *serverConfig) SetCredential(creds auth.Credentials) (prevCred auth.Credentials) {
+	if creds.IsValid() && globalActiveCred.IsValid() {
+		globalActiveCred = creds
+	}
+
 	// Save previous credential.
 	prevCred = s.Credential
 
@@ -80,15 +93,12 @@ func (s *serverConfig) SetCredential(creds auth.Credentials) (prevCred auth.Cred
 
 // GetCredentials get current credentials.
 func (s *serverConfig) GetCredential() auth.Credentials {
+	if globalActiveCred.IsValid() {
+		return globalActiveCred
+	}
 	return s.Credential
 }
 
-// SetBrowser set if browser is enabled.
-func (s *serverConfig) SetBrowser(b bool) {
-	// Set the new value.
-	s.Browser = BoolFlag(b)
-}
-
 // SetWorm set if worm is enabled.
 func (s *serverConfig) SetWorm(b bool) {
 	// Set the new value.
@@ -103,16 +113,23 @@ func (s *serverConfig) SetStorageClass(standardClass, rrsClass storageClass) {
 // GetStorageClass reads storage class fields from current config.
 // It returns the standard and reduced redundancy storage class struct
 func (s *serverConfig) GetStorageClass() (storageClass, storageClass) {
+	if globalIsStorageClass {
+		return globalStandardStorageClass, globalRRStorageClass
+	}
+	if s == nil {
+		return storageClass{}, storageClass{}
+	}
 	return s.StorageClass.Standard, s.StorageClass.RRS
 }
 
-// GetBrowser get current credentials.
-func (s *serverConfig) GetBrowser() bool {
-	return bool(s.Browser)
-}
-
 // GetWorm get current credentials.
 func (s *serverConfig) GetWorm() bool {
+	if globalIsEnvWORM {
+		return globalWORMEnabled
+	}
+	if s == nil {
+		return false
+	}
 	return bool(s.Worm)
 }
 
@@ -126,22 +143,262 @@ func (s *serverConfig) SetCacheConfig(drives, exclude []string, expiry int, maxu
 
 // GetCacheConfig gets the current cache config
 func (s *serverConfig) GetCacheConfig() CacheConfig {
+	if globalIsDiskCacheEnabled {
+		return CacheConfig{
+			Drives:  globalCacheDrives,
+			Exclude: globalCacheExcludes,
+			Expiry:  globalCacheExpiry,
+			MaxUse:  globalCacheMaxUse,
+		}
+	}
+	if s == nil {
+		return CacheConfig{}
+	}
 	return s.Cache
 }
 
-// Save config file to corresponding backend
-func Save(configFile string, data interface{}) error {
-	return quick.SaveConfig(data, configFile, globalEtcdClient)
+func (s *serverConfig) Validate() error {
+	if s == nil {
+		return nil
+	}
+	if s.Version != serverConfigVersion {
+		return fmt.Errorf("configuration version mismatch. Expected: ‘%s’, Got: ‘%s’", serverConfigVersion, s.Version)
+	}
+
+	// Validate credential fields only when
+	// they are not set via the environment
+	// Error out if global is env credential is not set and config has invalid credential
+	if !globalIsEnvCreds && !s.Credential.IsValid() {
+		return errors.New("invalid credential in config file")
+	}
+
+	// Region: nothing to validate
+	// Worm, Cache and StorageClass values are already validated during json unmarshal
+	for _, v := range s.Notify.AMQP {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("amqp: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.Elasticsearch {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("elasticsearch: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.Kafka {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("kafka: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.MQTT {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("mqtt: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.MySQL {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("mysql: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.NATS {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("nats: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.NSQ {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("nsq: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.PostgreSQL {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("postgreSQL: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.Redis {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("redis: %s", err)
+		}
+	}
+
+	for _, v := range s.Notify.Webhook {
+		if err := v.Validate(); err != nil {
+			return fmt.Errorf("webhook: %s", err)
+		}
+	}
+
+	return nil
 }
 
-// Load config from backend
-func Load(configFile string, data interface{}) (quick.Config, error) {
-	return quick.LoadConfig(configFile, globalEtcdClient, data)
+// SetCompressionConfig sets the current compression config
+func (s *serverConfig) SetCompressionConfig(extensions []string, mimeTypes []string) {
+	s.Compression.Extensions = extensions
+	s.Compression.MimeTypes = mimeTypes
+	s.Compression.Enabled = globalIsCompressionEnabled
 }
 
-// GetVersion gets config version from backend
-func GetVersion(configFile string) (string, error) {
-	return quick.GetVersion(configFile, globalEtcdClient)
+// GetCompressionConfig gets the current compression config
+func (s *serverConfig) GetCompressionConfig() compressionConfig {
+	return s.Compression
+}
+
+func (s *serverConfig) loadFromEnvs() {
+	// If env is set override the credentials from config file.
+	if globalIsEnvCreds {
+		s.SetCredential(globalActiveCred)
+	}
+
+	if globalIsEnvWORM {
+		s.SetWorm(globalWORMEnabled)
+	}
+
+	if globalIsEnvRegion {
+		s.SetRegion(globalServerRegion)
+	}
+
+	if globalIsStorageClass {
+		s.SetStorageClass(globalStandardStorageClass, globalRRStorageClass)
+	}
+
+	if globalIsDiskCacheEnabled {
+		s.SetCacheConfig(globalCacheDrives, globalCacheExcludes, globalCacheExpiry, globalCacheMaxUse)
+	}
+
+	if err := Environment.LookupKMSConfig(s.KMS); err != nil {
+		logger.FatalIf(err, "Unable to setup the KMS")
+	}
+
+	if globalIsEnvCompression {
+		s.SetCompressionConfig(globalCompressExtensions, globalCompressMimeTypes)
+	}
+
+	if jwksURL, ok := os.LookupEnv("MINIO_IAM_JWKS_URL"); ok {
+		if u, err := xnet.ParseURL(jwksURL); err == nil {
+			s.OpenID.JWKS.URL = u
+			s.OpenID.JWKS.PopulatePublicKey()
+		}
+	}
+
+	if opaURL, ok := os.LookupEnv("MINIO_IAM_OPA_URL"); ok {
+		if u, err := xnet.ParseURL(opaURL); err == nil {
+			s.Policy.OPA.URL = u
+			s.Policy.OPA.AuthToken = os.Getenv("MINIO_IAM_OPA_AUTHTOKEN")
+		}
+	}
+}
+
+// TestNotificationTargets tries to establish connections to all notification
+// targets when enabled. This is a good way to make sure all configurations
+// set by the user can work.
+func (s *serverConfig) TestNotificationTargets() error {
+	for k, v := range s.Notify.AMQP {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewAMQPTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("amqp(%s): %s", k, err.Error())
+		}
+		t.Close()
+	}
+
+	for k, v := range s.Notify.Elasticsearch {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewElasticsearchTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("elasticsearch(%s): %s", k, err.Error())
+		}
+		t.Close()
+	}
+
+	for k, v := range s.Notify.Kafka {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewKafkaTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("kafka(%s): %s", k, err.Error())
+		}
+		t.Close()
+	}
+
+	for k, v := range s.Notify.MQTT {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewMQTTTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("mqtt(%s): %s", k, err.Error())
+		}
+		t.Close()
+	}
+
+	for k, v := range s.Notify.MySQL {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewMySQLTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("mysql(%s): %s", k, err.Error())
+		}
+		t.Close()
+	}
+
+	for k, v := range s.Notify.NATS {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewNATSTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("nats(%s): %s", k, err.Error())
+		}
+		t.Close()
+	}
+
+	for k, v := range s.Notify.NSQ {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewNSQTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("nsq(%s): %s", k, err.Error())
+		}
+		t.Close()
+	}
+
+	for k, v := range s.Notify.PostgreSQL {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewPostgreSQLTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("postgreSQL(%s): %s", k, err.Error())
+		}
+		t.Close()
+	}
+
+	for k, v := range s.Notify.Redis {
+		if !v.Enable {
+			continue
+		}
+		t, err := target.NewRedisTarget(k, v)
+		if err != nil {
+			return fmt.Errorf("redis(%s): %s", k, err.Error())
+		}
+		t.Close()
+
+	}
+
+	return nil
 }
 
 // Returns the string describing a difference with the given
@@ -155,18 +412,18 @@ func (s *serverConfig) ConfigDiff(t *serverConfig) string {
 		return "Credential configuration differs"
 	case s.Region != t.Region:
 		return "Region configuration differs"
-	case s.Browser != t.Browser:
-		return "Browser configuration differs"
-	case s.Domain != t.Domain:
-		return "Domain configuration differs"
 	case s.StorageClass != t.StorageClass:
 		return "StorageClass configuration differs"
 	case !reflect.DeepEqual(s.Cache, t.Cache):
 		return "Cache configuration differs"
+	case !reflect.DeepEqual(s.Compression, t.Compression):
+		return "Compression configuration differs"
 	case !reflect.DeepEqual(s.Notify.AMQP, t.Notify.AMQP):
 		return "AMQP Notification configuration differs"
 	case !reflect.DeepEqual(s.Notify.NATS, t.Notify.NATS):
 		return "NATS Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.NSQ, t.Notify.NSQ):
+		return "NSQ Notification configuration differs"
 	case !reflect.DeepEqual(s.Notify.Elasticsearch, t.Notify.Elasticsearch):
 		return "ElasticSearch Notification configuration differs"
 	case !reflect.DeepEqual(s.Notify.Redis, t.Notify.Redis):
@@ -181,6 +438,10 @@ func (s *serverConfig) ConfigDiff(t *serverConfig) string {
 		return "MySQL Notification configuration differs"
 	case !reflect.DeepEqual(s.Notify.MQTT, t.Notify.MQTT):
 		return "MQTT Notification configuration differs"
+	case !reflect.DeepEqual(s.Logger, t.Logger):
+		return "Logger configuration differs"
+	case !reflect.DeepEqual(s.KMS, t.KMS):
+		return "KMS configuration differs"
 	case reflect.DeepEqual(s, t):
 		return ""
 	default:
@@ -198,7 +459,6 @@ func newServerConfig() *serverConfig {
 		Version:    serverConfigVersion,
 		Credential: cred,
 		Region:     globalMinioDefaultRegion,
-		Browser:    true,
 		StorageClass: storageClassConfig{
 			Standard: storageClass{},
 			RRS:      storageClass{},
@@ -209,7 +469,13 @@ func newServerConfig() *serverConfig {
 			Expiry:  globalCacheExpiry,
 			MaxUse:  globalCacheMaxUse,
 		},
+		KMS:    crypto.KMSConfig{},
 		Notify: notifier{},
+		Compression: compressionConfig{
+			Enabled:    false,
+			Extensions: globalCompressExtensions,
+			MimeTypes:  globalCompressMimeTypes,
+		},
 	}
 
 	// Make sure to initialize notification configs.
@@ -223,6 +489,8 @@ func newServerConfig() *serverConfig {
 	srvCfg.Notify.Redis["1"] = target.RedisArgs{}
 	srvCfg.Notify.NATS = make(map[string]target.NATSArgs)
 	srvCfg.Notify.NATS["1"] = target.NATSArgs{}
+	srvCfg.Notify.NSQ = make(map[string]target.NSQArgs)
+	srvCfg.Notify.NSQ["1"] = target.NSQArgs{}
 	srvCfg.Notify.PostgreSQL = make(map[string]target.PostgreSQLArgs)
 	srvCfg.Notify.PostgreSQL["1"] = target.PostgreSQLArgs{}
 	srvCfg.Notify.MySQL = make(map[string]target.MySQLArgs)
@@ -236,168 +504,130 @@ func newServerConfig() *serverConfig {
 	srvCfg.Cache.Exclude = make([]string, 0)
 	srvCfg.Cache.Expiry = globalCacheExpiry
 	srvCfg.Cache.MaxUse = globalCacheMaxUse
+
+	// Console logging is on by default
+	srvCfg.Logger.Console.Enabled = true
+	// Create an example of HTTP logger
+	srvCfg.Logger.HTTP = make(map[string]loggerHTTP)
+	srvCfg.Logger.HTTP["target1"] = loggerHTTP{Endpoint: "https://username:password@example.com/api"}
+
 	return srvCfg
 }
 
-// newConfig - initialize a new server config, saves env parameters if
-// found, otherwise use default parameters
-func newConfig() error {
-	// Initialize server config.
-	srvCfg, err := newQuickConfig(newServerConfig())
-	if err != nil {
-		return err
-	}
-
-	// If env is set override the credentials from config file.
-	if globalIsEnvCreds {
-		srvCfg.SetCredential(globalActiveCred)
-	}
-
-	if globalIsEnvBrowser {
-		srvCfg.SetBrowser(globalIsBrowserEnabled)
-	}
-
-	if globalIsEnvWORM {
-		srvCfg.SetWorm(globalWORMEnabled)
-	}
-
-	if globalIsEnvRegion {
-		srvCfg.SetRegion(globalServerRegion)
-	}
-
-	if globalIsEnvDomainName {
-		srvCfg.Domain = globalDomainName
-	}
-
-	if globalIsStorageClass {
-		srvCfg.SetStorageClass(globalStandardStorageClass, globalRRStorageClass)
-	}
-
-	if globalIsDiskCacheEnabled {
-		srvCfg.SetCacheConfig(globalCacheDrives, globalCacheExcludes, globalCacheExpiry, globalCacheMaxUse)
-	}
-
-	// hold the mutex lock before a new config is assigned.
-	// Save the new config globally.
-	// unlock the mutex.
-	globalServerConfigMu.Lock()
-	globalServerConfig = srvCfg
-	globalServerConfigMu.Unlock()
-
-	// Save config into file.
-	return Save(getConfigFile(), globalServerConfig)
-}
-
-// newQuickConfig - initialize a new server config, with an allocated
-// quick.Config interface.
-func newQuickConfig(srvCfg *serverConfig) (*serverConfig, error) {
-	qcfg, err := quick.NewConfig(srvCfg, globalEtcdClient)
-	if err != nil {
-		return nil, err
-	}
-
-	srvCfg.Config = qcfg
-	return srvCfg, nil
-}
-
-// getValidConfig - returns valid server configuration
-func getValidConfig() (*serverConfig, error) {
-	srvCfg := &serverConfig{
-		Region:  globalMinioDefaultRegion,
-		Browser: true,
-	}
-
-	var err error
-	srvCfg, err = newQuickConfig(srvCfg)
-	if err != nil {
-		return nil, err
-	}
-
-	configFile := getConfigFile()
-	if err = srvCfg.Load(configFile); err != nil {
-		return nil, err
-	}
-
-	if srvCfg.Version != serverConfigVersion {
-		return nil, fmt.Errorf("configuration version mismatch. Expected: ‘%s’, Got: ‘%s’", serverConfigVersion, srvCfg.Version)
-	}
-
-	// Validate credential fields only when
-	// they are not set via the environment
-	// Error out if global is env credential is not set and config has invalid credential
-	if !globalIsEnvCreds && !srvCfg.Credential.IsValid() {
-		return nil, errors.New("invalid credential in config file " + getConfigFile())
-	}
-
-	return srvCfg, nil
-}
-
-// loadConfig - loads a new config from disk, overrides params from env
-// if found and valid
-func loadConfig() error {
-	srvCfg, err := getValidConfig()
-	if err != nil {
-		return uiErrInvalidConfig(nil).Msg(err.Error())
-	}
-
-	// If env is set override the credentials from config file.
-	if globalIsEnvCreds {
-		srvCfg.SetCredential(globalActiveCred)
-	}
-
-	if globalIsEnvBrowser {
-		srvCfg.SetBrowser(globalIsBrowserEnabled)
-	}
-
-	if globalIsEnvRegion {
-		srvCfg.SetRegion(globalServerRegion)
-	}
-
-	if globalIsEnvDomainName {
-		srvCfg.Domain = globalDomainName
-	}
-
-	if globalIsStorageClass {
-		srvCfg.SetStorageClass(globalStandardStorageClass, globalRRStorageClass)
-	}
-
-	if globalIsDiskCacheEnabled {
-		srvCfg.SetCacheConfig(globalCacheDrives, globalCacheExcludes, globalCacheExpiry, globalCacheMaxUse)
-	}
-
-	// hold the mutex lock before a new config is assigned.
-	globalServerConfigMu.Lock()
-	globalServerConfig = srvCfg
+func (s *serverConfig) loadToCachedConfigs() {
 	if !globalIsEnvCreds {
-		globalActiveCred = globalServerConfig.GetCredential()
-	}
-	if !globalIsEnvBrowser {
-		globalIsBrowserEnabled = globalServerConfig.GetBrowser()
+		globalActiveCred = s.GetCredential()
 	}
 	if !globalIsEnvWORM {
-		globalWORMEnabled = globalServerConfig.GetWorm()
+		globalWORMEnabled = s.GetWorm()
 	}
 	if !globalIsEnvRegion {
-		globalServerRegion = globalServerConfig.GetRegion()
-	}
-	if !globalIsEnvDomainName {
-		globalDomainName = globalServerConfig.Domain
+		globalServerRegion = s.GetRegion()
 	}
 	if !globalIsStorageClass {
-		globalStandardStorageClass, globalRRStorageClass = globalServerConfig.GetStorageClass()
+		globalStandardStorageClass, globalRRStorageClass = s.GetStorageClass()
 	}
 	if !globalIsDiskCacheEnabled {
-		cacheConf := globalServerConfig.GetCacheConfig()
+		cacheConf := s.GetCacheConfig()
 		globalCacheDrives = cacheConf.Drives
 		globalCacheExcludes = cacheConf.Exclude
 		globalCacheExpiry = cacheConf.Expiry
 		globalCacheMaxUse = cacheConf.MaxUse
 	}
+	if err := Environment.LookupKMSConfig(s.KMS); err != nil {
+		logger.FatalIf(err, "Unable to setup the KMS")
+	}
+
+	if !globalIsCompressionEnabled {
+		compressionConf := s.GetCompressionConfig()
+		globalCompressExtensions = compressionConf.Extensions
+		globalCompressMimeTypes = compressionConf.MimeTypes
+		globalIsCompressionEnabled = compressionConf.Enabled
+	}
+
+	if globalIAMValidators == nil {
+		globalIAMValidators = getAuthValidators(s)
+	}
+
+	if globalPolicyOPA == nil {
+		if s.Policy.OPA.URL != nil && s.Policy.OPA.URL.String() != "" {
+			globalPolicyOPA = iampolicy.NewOpa(iampolicy.OpaArgs{
+				URL:         s.Policy.OPA.URL,
+				AuthToken:   s.Policy.OPA.AuthToken,
+				Transport:   NewCustomHTTPTransport(),
+				CloseRespFn: CloseResponse,
+			})
+		}
+	}
+}
+
+// newSrvConfig - initialize a new server config, saves env parameters if
+// found, otherwise use default parameters
+func newSrvConfig(objAPI ObjectLayer) error {
+	// Initialize server config.
+	srvCfg := newServerConfig()
+
+	// Override any values from ENVs.
+	srvCfg.loadFromEnvs()
+
+	// Load values to cached global values.
+	srvCfg.loadToCachedConfigs()
+
+	// hold the mutex lock before a new config is assigned.
+	globalServerConfigMu.Lock()
+	globalServerConfig = srvCfg
+	globalServerConfigMu.Unlock()
+
+	// Save config into file.
+	return saveServerConfig(context.Background(), objAPI, globalServerConfig)
+}
+
+// getValidConfig - returns valid server configuration
+func getValidConfig(objAPI ObjectLayer) (*serverConfig, error) {
+	srvCfg, err := readServerConfig(context.Background(), objAPI)
+	if err != nil {
+		return nil, err
+	}
+
+	return srvCfg, srvCfg.Validate()
+}
+
+// loadConfig - loads a new config from disk, overrides params from env
+// if found and valid
+func loadConfig(objAPI ObjectLayer) error {
+	srvCfg, err := getValidConfig(objAPI)
+	if err != nil {
+		return uiErrInvalidConfig(nil).Msg(err.Error())
+	}
+
+	// Override any values from ENVs.
+	srvCfg.loadFromEnvs()
+
+	// Load values to cached global values.
+	srvCfg.loadToCachedConfigs()
+
+	// hold the mutex lock before a new config is assigned.
+	globalServerConfigMu.Lock()
+	globalServerConfig = srvCfg
 	globalServerConfigMu.Unlock()
 
 	return nil
 }
 
+// getAuthValidators - returns ValidatorList which contains
+// enabled providers in server config.
+// A new authentication provider is added like below
+// * Add a new provider in pkg/iam/validator package.
+func getAuthValidators(config *serverConfig) *validator.Validators {
+	validators := validator.NewValidators()
+
+	if config.OpenID.JWKS.URL != nil {
+		validators.Add(validator.NewJWT(config.OpenID.JWKS))
+	}
+
+	return validators
+}
+
 // getNotificationTargets - returns TargetList which contains enabled targets in serverConfig.
 // A new notification target is added like below
 // * Add a new target in pkg/event/target package.
@@ -405,7 +635,9 @@ func loadConfig() error {
 // * Handle the configuration in this function to create/add into TargetList.
 func getNotificationTargets(config *serverConfig) *event.TargetList {
 	targetList := event.NewTargetList()
-
+	if config == nil {
+		return targetList
+	}
 	for id, args := range config.Notify.AMQP {
 		if args.Enable {
 			newTarget, err := target.NewAMQPTarget(id, args)
@@ -492,6 +724,20 @@ func getNotificationTargets(config *serverConfig) *event.TargetList {
 		}
 	}
 
+	for id, args := range config.Notify.NSQ {
+		if args.Enable {
+			newTarget, err := target.NewNSQTarget(id, args)
+			if err != nil {
+				logger.LogIf(context.Background(), err)
+				continue
+			}
+			if err = targetList.Add(newTarget); err != nil {
+				logger.LogIf(context.Background(), err)
+				continue
+			}
+		}
+	}
+
 	for id, args := range config.Notify.PostgreSQL {
 		if args.Enable {
 			newTarget, err := target.NewPostgreSQLTarget(id, args)

cmd/config-current_test.go

@@ -17,9 +17,9 @@
 package cmd
 
 import (
-	"io/ioutil"
+	"context"
 	"os"
-	"path/filepath"
+	"path"
 	"testing"
 
 	"github.com/minio/minio/pkg/auth"
@@ -27,12 +27,15 @@ import (
 )
 
 func TestServerConfig(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	objLayer, fsDir, err := prepareFS()
 	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(fsDir)
+
+	if err = newTestConfig(globalMinioDefaultRegion, objLayer); err != nil {
 		t.Fatalf("Init Test config failed")
 	}
-	// remove the root directory after the test ends.
-	defer os.RemoveAll(rootPath)
 
 	if globalServerConfig.GetRegion() != globalMinioDefaultRegion {
 		t.Errorf("Expecting region `us-east-1` found %s", globalServerConfig.GetRegion())
@@ -49,16 +52,12 @@ func TestServerConfig(t *testing.T) {
 		t.Errorf("Expecting version %s found %s", globalServerConfig.GetVersion(), serverConfigVersion)
 	}
 
-	// Attempt to save.
-	if err := globalServerConfig.Save(getConfigFile()); err != nil {
+	if err := saveServerConfig(context.Background(), objLayer, globalServerConfig); err != nil {
 		t.Fatalf("Unable to save updated config file %s", err)
 	}
 
-	// Do this only once here.
-	setConfigDir(rootPath)
-
 	// Initialize server config.
-	if err := loadConfig(); err != nil {
+	if err := loadConfig(objLayer); err != nil {
 		t.Fatalf("Unable to initialize from updated config file %s", err)
 	}
 }
@@ -68,6 +67,9 @@ func TestServerConfigWithEnvs(t *testing.T) {
 	os.Setenv("MINIO_BROWSER", "off")
 	defer os.Unsetenv("MINIO_BROWSER")
 
+	os.Setenv("MINIO_WORM", "on")
+	defer os.Unsetenv("MINIO_WORM")
+
 	os.Setenv("MINIO_ACCESS_KEY", "minio")
 	defer os.Unsetenv("MINIO_ACCESS_KEY")
 
@@ -82,61 +84,70 @@ func TestServerConfigWithEnvs(t *testing.T) {
 
 	defer resetGlobalIsEnvs()
 
-	// Get test root.
-	rootPath, err := getTestRoot()
+	objLayer, fsDir, err := prepareFS()
 	if err != nil {
-		t.Error(err)
+		t.Fatal(err)
 	}
+	defer os.RemoveAll(fsDir)
+
+	if err = newTestConfig(globalMinioDefaultRegion, objLayer); err != nil {
+		t.Fatalf("Init Test config failed")
+	}
+
+	globalObjLayerMutex.Lock()
+	globalObjectAPI = objLayer
+	globalObjLayerMutex.Unlock()
 
 	serverHandleEnvVars()
 
-	// Do this only once here.
-	setConfigDir(rootPath)
-
 	// Init config
-	initConfig()
+	initConfig(objLayer)
 
-	// remove the root directory after the test ends.
-	defer os.RemoveAll(rootPath)
-
-	// Check if serverConfig has
-	if globalServerConfig.GetBrowser() {
-		t.Errorf("Expecting browser is set to false found %v", globalServerConfig.GetBrowser())
+	// Check if serverConfig has browser disabled
+	if globalIsBrowserEnabled {
+		t.Error("Expected browser to be disabled but it is not")
 	}
 
-	// Check if serverConfig has
+	// Check if serverConfig returns WORM config from the env
+	if !globalServerConfig.GetWorm() {
+		t.Error("Expected WORM to be enabled but it is not")
+	}
+
+	// Check if serverConfig has region from the environment
 	if globalServerConfig.GetRegion() != "us-west-1" {
-		t.Errorf("Expecting region to be \"us-west-1\" found %v", globalServerConfig.GetRegion())
+		t.Errorf("Expected region to be \"us-west-1\", found %v", globalServerConfig.GetRegion())
 	}
 
-	// Check if serverConfig has
+	// Check if serverConfig has credentials from the environment
 	cred := globalServerConfig.GetCredential()
 
 	if cred.AccessKey != "minio" {
-		t.Errorf("Expecting access key to be `minio` found %s", cred.AccessKey)
+		t.Errorf("Expected access key to be `minio`, found %s", cred.AccessKey)
 	}
 
 	if cred.SecretKey != "minio123" {
-		t.Errorf("Expecting access key to be `minio123` found %s", cred.SecretKey)
+		t.Errorf("Expected access key to be `minio123`, found %s", cred.SecretKey)
 	}
 
-	if globalServerConfig.Domain != "domain.com" {
-		t.Errorf("Expecting Domain to be `domain.com` found " + globalServerConfig.Domain)
+	// Check if serverConfig has the correct domain
+	if globalDomainName != "domain.com" {
+		t.Errorf("Expected Domain to be `domain.com`, found " + globalDomainName)
 	}
 }
 
 // Tests config validator..
 func TestValidateConfig(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	objLayer, fsDir, err := prepareFS()
 	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(fsDir)
+
+	if err = newTestConfig(globalMinioDefaultRegion, objLayer); err != nil {
 		t.Fatalf("Init Test config failed")
 	}
 
-	// remove the root directory after the test ends.
-	defer os.RemoveAll(rootPath)
-
-	configPath := filepath.Join(rootPath, minioConfigFile)
-
+	configPath := path.Join(minioConfigPrefix, minioConfigFile)
 	v := serverConfigVersion
 
 	testCases := []struct {
@@ -174,66 +185,69 @@ func TestValidateConfig(t *testing.T) {
 		{`{"version": "` + v + `", "browser": "on", "browser": "on", "region":"us-east-1", "credential" : {"accessKey":"minio", "secretKey":"minio123"}}`, false},
 
 		// Test 11 - Test AMQP
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "amqp": { "1": { "enable": true, "url": "", "exchange": "", "routingKey": "", "exchangeType": "", "mandatory": false, "immediate": false, "durable": false, "internal": false, "noWait": false, "autoDeleted": false }}}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "amqp": { "1": { "enable": true, "url": "", "exchange": "", "routingKey": "", "exchangeType": "", "mandatory": false, "immediate": false, "durable": false, "internal": false, "noWait": false, "autoDeleted": false }}}}`, false},
 
 		// Test 12 - Test NATS
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "nats": { "1": { "enable": true, "address": "", "subject": "", "username": "", "password": "", "token": "", "secure": false, "pingInterval": 0, "streaming": { "enable": false, "clusterID": "", "clientID": "", "async": false, "maxPubAcksInflight": 0 } } }}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "nats": { "1": { "enable": true, "address": "", "subject": "", "username": "", "password": "", "token": "", "secure": false, "pingInterval": 0, "streaming": { "enable": false, "clusterID": "", "async": false, "maxPubAcksInflight": 0 } } }}}`, false},
 
 		// Test 13 - Test ElasticSearch
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "url": "", "index": "" } }}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "url": "", "index": "" } }}}`, false},
 
 		// Test 14 - Test Redis
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "redis": { "1": { "enable": true, "address": "", "password": "", "key": "" } }}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "redis": { "1": { "enable": true, "address": "", "password": "", "key": "" } }}}`, false},
 
 		// Test 15 - Test PostgreSQL
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "postgresql": { "1": { "enable": true, "connectionString": "", "table": "", "host": "", "port": "", "user": "", "password": "", "database": "" }}}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "postgresql": { "1": { "enable": true, "connectionString": "", "table": "", "host": "", "port": "", "user": "", "password": "", "database": "" }}}}`, false},
 
 		// Test 16 - Test Kafka
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "kafka": { "1": { "enable": true, "brokers": null, "topic": "" } }}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "kafka": { "1": { "enable": true, "brokers": null, "topic": "" } }}}`, false},
 
 		// Test 17 - Test Webhook
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "webhook": { "1": { "enable": true, "endpoint": "" } }}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "webhook": { "1": { "enable": true, "endpoint": "" } }}}`, false},
 
 		// Test 18 - Test MySQL
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mysql": { "1": { "enable": true, "dsnString": "",  "table": "", "host": "", "port": "", "user": "", "password": "", "database": "" }}}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mysql": { "1": { "enable": true, "dsnString": "",  "table": "", "host": "", "port": "", "user": "", "password": "", "database": "" }}}}`, false},
 
 		// Test 19 - Test Format for MySQL
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mysql": { "1": { "enable": true, "dsnString": "",  "format": "invalid", "table": "xxx", "host": "10.0.0.1", "port": "3306", "user": "abc", "password": "pqr", "database": "test1" }}}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mysql": { "1": { "enable": true, "dsnString": "",  "format": "invalid", "table": "xxx", "host": "10.0.0.1", "port": "3306", "user": "abc", "password": "pqr", "database": "test1" }}}}`, false},
 
 		// Test 20 - Test valid Format for MySQL
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mysql": { "1": { "enable": true, "dsnString": "",  "format": "namespace", "table": "xxx", "host": "10.0.0.1", "port": "3306", "user": "abc", "password": "pqr", "database": "test1" }}}}`, true},
 
 		// Test 21 - Test Format for PostgreSQL
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "postgresql": { "1": { "enable": true, "connectionString": "", "format": "invalid", "table": "xxx", "host": "myhost", "port": "5432", "user": "abc", "password": "pqr", "database": "test1" }}}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "postgresql": { "1": { "enable": true, "connectionString": "", "format": "invalid", "table": "xxx", "host": "myhost", "port": "5432", "user": "abc", "password": "pqr", "database": "test1" }}}}`, false},
 
 		// Test 22 - Test valid Format for PostgreSQL
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "postgresql": { "1": { "enable": true, "connectionString": "", "format": "namespace", "table": "xxx", "host": "myhost", "port": "5432", "user": "abc", "password": "pqr", "database": "test1" }}}}`, true},
 
 		// Test 23 - Test Format for ElasticSearch
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "format": "invalid", "url": "example.com", "index": "myindex" } }}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "format": "invalid", "url": "example.com", "index": "myindex" } }}}`, false},
 
 		// Test 24 - Test valid Format for ElasticSearch
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "format": "namespace", "url": "example.com", "index": "myindex" } }}}`, true},
 
 		// Test 25 - Test Format for Redis
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "redis": { "1": { "enable": true, "format": "invalid", "address": "example.com:80", "password": "xxx", "key": "key1" } }}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "redis": { "1": { "enable": true, "format": "invalid", "address": "example.com:80", "password": "xxx", "key": "key1" } }}}`, false},
 
 		// Test 26 - Test valid Format for Redis
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "redis": { "1": { "enable": true, "format": "namespace", "address": "example.com:80", "password": "xxx", "key": "key1" } }}}`, true},
 
 		// Test 27 - Test MQTT
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mqtt": { "1": { "enable": true, "broker": "",  "topic": "", "qos": 0, "clientId": "", "username": "", "password": ""}}}}`, true},
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mqtt": { "1": { "enable": true, "broker": "",  "topic": "", "qos": 0, "clientId": "", "username": "", "password": ""}}}}`, false},
+
+		// Test 28 - Test NSQ
+		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "nsq": { "1": { "enable": true, "nsqdAddress": "", "topic": ""} }}}`, false},
 	}
 
 	for i, testCase := range testCases {
-		if werr := ioutil.WriteFile(configPath, []byte(testCase.configData), 0700); werr != nil {
-			t.Fatal(werr)
+		if err = saveConfig(context.Background(), objLayer, configPath, []byte(testCase.configData)); err != nil {
+			t.Fatal(err)
 		}
-		_, verr := getValidConfig()
-		if testCase.shouldPass && verr != nil {
-			t.Errorf("Test %d, should pass but it failed with err = %v", i+1, verr)
+		_, err = getValidConfig(objLayer)
+		if testCase.shouldPass && err != nil {
+			t.Errorf("Test %d, should pass but it failed with err = %v", i+1, err)
 		}
-		if !testCase.shouldPass && verr == nil {
+		if !testCase.shouldPass && err == nil {
 			t.Errorf("Test %d, should fail but it succeeded.", i+1)
 		}
 	}
@@ -249,76 +263,98 @@ func TestConfigDiff(t *testing.T) {
 		{&serverConfig{}, nil, "Given configuration is empty"},
 		// 2
 		{
-			&serverConfig{Credential: auth.Credentials{"u1", "p1"}},
-			&serverConfig{Credential: auth.Credentials{"u1", "p2"}},
+			&serverConfig{Credential: auth.Credentials{
+				AccessKey:  "u1",
+				SecretKey:  "p1",
+				Expiration: timeSentinel,
+			}},
+			&serverConfig{Credential: auth.Credentials{
+				AccessKey:  "u1",
+				SecretKey:  "p2",
+				Expiration: timeSentinel,
+			}},
 			"Credential configuration differs",
 		},
 		// 3
 		{&serverConfig{Region: "us-east-1"}, &serverConfig{Region: "us-west-1"}, "Region configuration differs"},
 		// 4
-		{&serverConfig{Browser: false}, &serverConfig{Browser: true}, "Browser configuration differs"},
-		// 5
-		{&serverConfig{Domain: "domain1"}, &serverConfig{Domain: "domain2"}, "Domain configuration differs"},
-		// 6
 		{
 			&serverConfig{StorageClass: storageClassConfig{storageClass{"1", 8}, storageClass{"2", 6}}},
 			&serverConfig{StorageClass: storageClassConfig{storageClass{"1", 8}, storageClass{"2", 4}}},
 			"StorageClass configuration differs",
 		},
-		// 7
+		// 5
 		{
 			&serverConfig{Notify: notifier{AMQP: map[string]target.AMQPArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{AMQP: map[string]target.AMQPArgs{"1": {Enable: false}}}},
 			"AMQP Notification configuration differs",
 		},
-		// 8
+		// 6
 		{
 			&serverConfig{Notify: notifier{NATS: map[string]target.NATSArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{NATS: map[string]target.NATSArgs{"1": {Enable: false}}}},
 			"NATS Notification configuration differs",
 		},
-		// 9
+		// 7
+		{
+			&serverConfig{Notify: notifier{NSQ: map[string]target.NSQArgs{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{NSQ: map[string]target.NSQArgs{"1": {Enable: false}}}},
+			"NSQ Notification configuration differs",
+		},
+		// 8
 		{
 			&serverConfig{Notify: notifier{Elasticsearch: map[string]target.ElasticsearchArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{Elasticsearch: map[string]target.ElasticsearchArgs{"1": {Enable: false}}}},
 			"ElasticSearch Notification configuration differs",
 		},
-		// 10
+		// 9
 		{
 			&serverConfig{Notify: notifier{Redis: map[string]target.RedisArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{Redis: map[string]target.RedisArgs{"1": {Enable: false}}}},
 			"Redis Notification configuration differs",
 		},
-		// 11
+		// 10
 		{
 			&serverConfig{Notify: notifier{PostgreSQL: map[string]target.PostgreSQLArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{PostgreSQL: map[string]target.PostgreSQLArgs{"1": {Enable: false}}}},
 			"PostgreSQL Notification configuration differs",
 		},
-		// 12
+		// 11
 		{
 			&serverConfig{Notify: notifier{Kafka: map[string]target.KafkaArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{Kafka: map[string]target.KafkaArgs{"1": {Enable: false}}}},
 			"Kafka Notification configuration differs",
 		},
-		// 13
+		// 12
 		{
 			&serverConfig{Notify: notifier{Webhook: map[string]target.WebhookArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{Webhook: map[string]target.WebhookArgs{"1": {Enable: false}}}},
 			"Webhook Notification configuration differs",
 		},
-		// 14
+		// 13
 		{
 			&serverConfig{Notify: notifier{MySQL: map[string]target.MySQLArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{MySQL: map[string]target.MySQLArgs{"1": {Enable: false}}}},
 			"MySQL Notification configuration differs",
 		},
-		// 15
+		// 14
 		{
 			&serverConfig{Notify: notifier{MQTT: map[string]target.MQTTArgs{"1": {Enable: true}}}},
 			&serverConfig{Notify: notifier{MQTT: map[string]target.MQTTArgs{"1": {Enable: false}}}},
 			"MQTT Notification configuration differs",
 		},
+		// 15
+		{
+			&serverConfig{Logger: loggerConfig{
+				Console: loggerConsole{Enabled: true},
+				HTTP:    map[string]loggerHTTP{"1": {Endpoint: "http://address1"}},
+			}},
+			&serverConfig{Logger: loggerConfig{
+				Console: loggerConsole{Enabled: true},
+				HTTP:    map[string]loggerHTTP{"1": {Endpoint: "http://address2"}},
+			}},
+			"Logger configuration differs",
+		},
 	}
 
 	for i, testCase := range testCases {

cmd/config-dir.go

@@ -28,9 +28,6 @@ const (
 	// Default minio configuration directory where below configuration files/directories are stored.
 	defaultMinioConfigDir = ".minio"
 
-	// Minio configuration file.
-	minioConfigFile = "config.json"
-
 	// Directory contains below files/directories for HTTPS configuration.
 	certsDir = "certs"
 
@@ -77,7 +74,15 @@ func (config *ConfigDir) GetCADir() string {
 
 // Create - creates configuration directory tree.
 func (config *ConfigDir) Create() error {
-	return os.MkdirAll(config.GetCADir(), 0700)
+	err := os.MkdirAll(config.GetCADir(), 0700)
+	// It is possible in kubernetes like deployments this directory
+	// is already mounted and is not writable, ignore any write errors.
+	if err != nil {
+		if os.IsPermission(err) {
+			err = nil
+		}
+	}
+	return err
 }
 
 // GetMinioConfigFile - returns absolute path of config.json file.

cmd/config-migrate.go

@@ -17,15 +17,21 @@
 package cmd
 
 import (
+	"context"
+	"encoding/json"
 	"fmt"
 	"os"
+	"path"
 	"path/filepath"
 
+	"github.com/minio/minio/cmd/crypto"
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/dns"
 	"github.com/minio/minio/pkg/event"
 	"github.com/minio/minio/pkg/event/target"
+	"github.com/minio/minio/pkg/iam/policy"
+	"github.com/minio/minio/pkg/iam/validator"
 	xnet "github.com/minio/minio/pkg/net"
 	"github.com/minio/minio/pkg/quick"
 )
@@ -33,7 +39,22 @@ import (
 // DO NOT EDIT following message template, please open a github issue to discuss instead.
 var configMigrateMSGTemplate = "Configuration file %s migrated from version '%s' to '%s' successfully."
 
-// Migrates all config versions from "1" to "18".
+// Save config file to corresponding backend
+func Save(configFile string, data interface{}) error {
+	return quick.SaveConfig(data, configFile, globalEtcdClient)
+}
+
+// Load config from backend
+func Load(configFile string, data interface{}) (quick.Config, error) {
+	return quick.LoadConfig(configFile, globalEtcdClient, data)
+}
+
+// GetVersion gets config version from backend
+func GetVersion(configFile string) (string, error) {
+	return quick.GetVersion(configFile, globalEtcdClient)
+}
+
+// Migrates all config versions from "1" to "28".
 func migrateConfig() error {
 	// Purge all configs with version '1',
 	// this is a special case since version '1' used
@@ -45,6 +66,9 @@ func migrateConfig() error {
 	// Load only config version information.
 	version, err := GetVersion(getConfigFile())
 	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
 		return err
 	}
 
@@ -188,6 +212,16 @@ func migrateConfig() error {
 			return err
 		}
 		fallthrough
+	case "26":
+		if err = migrateV26ToV27(); err != nil {
+			return err
+		}
+		fallthrough
+	case "27":
+		if err = migrateV27ToV28(); err != nil {
+			return err
+		}
+		fallthrough
 	case serverConfigVersion:
 		// No migration needed. this always points to current version.
 		err = nil
@@ -885,7 +919,7 @@ func migrateV12ToV13() error {
 	// Copy over fields from V12 into V13 config struct
 	srvConfig := &serverConfigV13{
 		Logger: &loggerV7{},
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "13"
 	srvConfig.Credential = cv12.Credential
@@ -965,7 +999,7 @@ func migrateV13ToV14() error {
 	// Copy over fields from V13 into V14 config struct
 	srvConfig := &serverConfigV14{
 		Logger: &loggerV7{},
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "14"
 	srvConfig.Credential = cv13.Credential
@@ -1050,7 +1084,7 @@ func migrateV14ToV15() error {
 	// Copy over fields from V14 into V15 config struct
 	srvConfig := &serverConfigV15{
 		Logger: &loggerV7{},
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "15"
 	srvConfig.Credential = cv14.Credential
@@ -1140,7 +1174,7 @@ func migrateV15ToV16() error {
 	// Copy over fields from V15 into V16 config struct
 	srvConfig := &serverConfigV16{
 		Logger: &loggers{},
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "16"
 	srvConfig.Credential = cv15.Credential
@@ -1230,7 +1264,7 @@ func migrateV16ToV17() error {
 	// Copy over fields from V16 into V17 config struct
 	srvConfig := &serverConfigV17{
 		Logger: &loggers{},
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "17"
 	srvConfig.Credential = cv16.Credential
@@ -1351,7 +1385,7 @@ func migrateV17ToV18() error {
 	// Copy over fields from V17 into V18 config struct
 	srvConfig := &serverConfigV17{
 		Logger: &loggers{},
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "18"
 	srvConfig.Credential = cv17.Credential
@@ -1453,7 +1487,7 @@ func migrateV18ToV19() error {
 	// Copy over fields from V18 into V19 config struct
 	srvConfig := &serverConfigV18{
 		Logger: &loggers{},
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "19"
 	srvConfig.Credential = cv18.Credential
@@ -1559,7 +1593,7 @@ func migrateV19ToV20() error {
 	// Copy over fields from V19 into V20 config struct
 	srvConfig := &serverConfigV20{
 		Logger: &loggers{},
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "20"
 	srvConfig.Credential = cv19.Credential
@@ -1663,7 +1697,7 @@ func migrateV20ToV21() error {
 
 	// Copy over fields from V20 into V21 config struct
 	srvConfig := &serverConfigV21{
-		Notify: &notifier{},
+		Notify: &notifierV3{},
 	}
 	srvConfig.Version = "21"
 	srvConfig.Credential = cv20.Credential
@@ -1767,7 +1801,7 @@ func migrateV21ToV22() error {
 
 	// Copy over fields from V21 into V22 config struct
 	srvConfig := &serverConfigV22{
-		Notify: notifier{},
+		Notify: notifierV3{},
 	}
 	srvConfig.Version = "22"
 	srvConfig.Credential = cv21.Credential
@@ -1871,7 +1905,7 @@ func migrateV22ToV23() error {
 
 	// Copy over fields from V22 into V23 config struct
 	srvConfig := &serverConfigV23{
-		Notify: notifier{},
+		Notify: notifierV3{},
 	}
 	srvConfig.Version = "23"
 	srvConfig.Credential = cv22.Credential
@@ -1984,7 +2018,7 @@ func migrateV23ToV24() error {
 
 	// Copy over fields from V23 into V24 config struct
 	srvConfig := &serverConfigV24{
-		Notify: notifier{},
+		Notify: notifierV3{},
 	}
 	srvConfig.Version = "24"
 	srvConfig.Credential = cv23.Credential
@@ -2097,7 +2131,7 @@ func migrateV24ToV25() error {
 
 	// Copy over fields from V24 into V25 config struct
 	srvConfig := &serverConfigV25{
-		Notify: notifier{},
+		Notify: notifierV3{},
 	}
 	srvConfig.Version = "25"
 	srvConfig.Credential = cv24.Credential
@@ -2215,7 +2249,7 @@ func migrateV25ToV26() error {
 
 	// Copy over fields from V25 into V26 config struct
 	srvConfig := &serverConfigV26{
-		Notify: notifier{},
+		Notify: notifierV3{},
 	}
 	srvConfig.Version = "26"
 	srvConfig.Credential = cv25.Credential
@@ -2317,3 +2351,367 @@ func migrateV25ToV26() error {
 	logger.Info(configMigrateMSGTemplate, configFile, cv25.Version, srvConfig.Version)
 	return nil
 }
+
+func migrateV26ToV27() error {
+	configFile := getConfigFile()
+
+	// config V27 is backward compatible with V26, load the old
+	// config file in serverConfigV27 struct and put some examples
+	// in the new `logger` field
+	srvConfig := &serverConfigV27{}
+	_, err := quick.LoadConfig(configFile, globalEtcdClient, srvConfig)
+	if os.IsNotExist(err) {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config file. %v", err)
+	}
+
+	if srvConfig.Version != "26" {
+		return nil
+	}
+
+	srvConfig.Version = "27"
+	// Enable console logging by default to avoid breaking users
+	// current deployments
+	srvConfig.Logger.Console.Enabled = true
+	srvConfig.Logger.HTTP = make(map[string]loggerHTTP)
+	srvConfig.Logger.HTTP["1"] = loggerHTTP{}
+
+	if err = quick.SaveConfig(srvConfig, configFile, globalEtcdClient); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘26’ to ‘27’. %v", err)
+	}
+
+	logger.Info(configMigrateMSGTemplate, configFile, "26", "27")
+	return nil
+}
+
+func migrateV27ToV28() error {
+	configFile := getConfigFile()
+
+	// config V28 is backward compatible with V27, load the old
+	// config file in serverConfigV28 struct and initialize KMSConfig
+
+	srvConfig := &serverConfigV28{}
+	_, err := quick.LoadConfig(configFile, globalEtcdClient, srvConfig)
+	if os.IsNotExist(err) {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config file. %v", err)
+	}
+
+	if srvConfig.Version != "27" {
+		return nil
+	}
+
+	srvConfig.Version = "28"
+	srvConfig.KMS = crypto.KMSConfig{}
+	if err = quick.SaveConfig(srvConfig, configFile, globalEtcdClient); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘27’ to ‘28’. %v", err)
+	}
+
+	logger.Info(configMigrateMSGTemplate, configFile, "27", "28")
+	return nil
+}
+
+// Migrates ${HOME}/.minio/config.json to '<export_path>/.minio.sys/config/config.json'
+func migrateConfigToMinioSys(objAPI ObjectLayer) (err error) {
+	defer func() {
+		// Rename config.json to config.json.deprecated only upon
+		// success of this function.
+		if err == nil {
+			os.Rename(getConfigFile(), getConfigFile()+".deprecated")
+		}
+	}()
+
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+	// Construct path to config.json for the given bucket.
+	transactionConfigFile := configFile + ".transaction"
+
+	// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
+	// and configFile, take a transaction lock to avoid data race between readConfig()
+	// and saveConfig().
+	objLock := globalNSMutex.NewNSLock(minioMetaBucket, transactionConfigFile)
+	if err = objLock.GetLock(globalOperationTimeout); err != nil {
+		return err
+	}
+	defer objLock.Unlock()
+
+	// Verify if backend already has the file.
+	if err = checkConfig(context.Background(), objAPI, configFile); err != errConfigNotFound {
+		return err
+	} // if errConfigNotFound proceed to migrate..
+
+	var config = &serverConfig{}
+	if _, err = Load(getConfigFile(), config); err != nil {
+		if !os.IsNotExist(err) {
+			return err
+		}
+		// Read from deprecate file as well if necessary.
+		if _, err = Load(getConfigFile()+".deprecated", config); err != nil {
+			return err
+		}
+	}
+
+	return saveServerConfig(context.Background(), objAPI, config)
+}
+
+// Migrates '.minio.sys/config.json' to v33.
+func migrateMinioSysConfig(objAPI ObjectLayer) error {
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+
+	// Construct path to config.json for the given bucket.
+	transactionConfigFile := configFile + ".transaction"
+
+	// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
+	// and configFile, take a transaction lock to avoid data race between readConfig()
+	// and saveConfig().
+	objLock := globalNSMutex.NewNSLock(minioMetaBucket, transactionConfigFile)
+	if err := objLock.GetLock(globalOperationTimeout); err != nil {
+		return err
+	}
+	defer objLock.Unlock()
+
+	if err := migrateV27ToV28MinioSys(objAPI); err != nil {
+		return err
+	}
+	if err := migrateV28ToV29MinioSys(objAPI); err != nil {
+		return err
+	}
+	if err := migrateV29ToV30MinioSys(objAPI); err != nil {
+		return err
+	}
+	if err := migrateV30ToV31MinioSys(objAPI); err != nil {
+		return err
+	}
+	if err := migrateV31ToV32MinioSys(objAPI); err != nil {
+		return err
+	}
+	return migrateV32ToV33MinioSys(objAPI)
+}
+
+func checkConfigVersion(objAPI ObjectLayer, configFile string, version string) (bool, []byte, error) {
+	data, err := readConfig(context.Background(), objAPI, configFile)
+	if err != nil {
+		return false, nil, err
+	}
+
+	var versionConfig struct {
+		Version string `json:"version"`
+	}
+
+	vcfg := &versionConfig
+	if err = json.Unmarshal(data, vcfg); err != nil {
+		return false, nil, err
+	}
+	return vcfg.Version == version, data, nil
+}
+
+func migrateV27ToV28MinioSys(objAPI ObjectLayer) error {
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+	ok, data, err := checkConfigVersion(objAPI, configFile, "27")
+	if err == errConfigNotFound {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config file. %v", err)
+	}
+	if !ok {
+		return nil
+	}
+
+	cfg := &serverConfigV28{}
+	if err = json.Unmarshal(data, cfg); err != nil {
+		return err
+	}
+
+	cfg.Version = "28"
+	cfg.KMS = crypto.KMSConfig{}
+
+	data, err = json.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	if err = saveConfig(context.Background(), objAPI, configFile, data); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘27’ to ‘28’. %v", err)
+	}
+
+	logger.Info(configMigrateMSGTemplate, configFile, "27", "28")
+	return nil
+}
+
+func migrateV28ToV29MinioSys(objAPI ObjectLayer) error {
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+
+	ok, data, err := checkConfigVersion(objAPI, configFile, "28")
+	if err == errConfigNotFound {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config file. %v", err)
+	}
+	if !ok {
+		return nil
+	}
+
+	cfg := &serverConfigV29{}
+	if err = json.Unmarshal(data, cfg); err != nil {
+		return err
+	}
+
+	cfg.Version = "29"
+	data, err = json.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	if err = saveConfig(context.Background(), objAPI, configFile, data); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘28’ to ‘29’. %v", err)
+	}
+
+	logger.Info(configMigrateMSGTemplate, configFile, "28", "29")
+	return nil
+}
+
+func migrateV29ToV30MinioSys(objAPI ObjectLayer) error {
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+
+	ok, data, err := checkConfigVersion(objAPI, configFile, "29")
+	if err == errConfigNotFound {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config file. %v", err)
+	}
+	if !ok {
+		return nil
+	}
+
+	cfg := &serverConfigV30{}
+	if err = json.Unmarshal(data, cfg); err != nil {
+		return err
+	}
+
+	cfg.Version = "30"
+	// Init compression config.For future migration, Compression config needs to be copied over from previous version.
+	cfg.Compression.Enabled = false
+	cfg.Compression.Extensions = globalCompressExtensions
+	cfg.Compression.MimeTypes = globalCompressMimeTypes
+
+	data, err = json.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	if err = saveConfig(context.Background(), objAPI, configFile, data); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘29’ to ‘30’. %v", err)
+	}
+
+	logger.Info(configMigrateMSGTemplate, configFile, "29", "30")
+	return nil
+}
+
+func migrateV30ToV31MinioSys(objAPI ObjectLayer) error {
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+
+	ok, data, err := checkConfigVersion(objAPI, configFile, "30")
+	if err == errConfigNotFound {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config file. %v", err)
+	}
+	if !ok {
+		return nil
+	}
+
+	cfg := &serverConfigV31{}
+	if err = json.Unmarshal(data, cfg); err != nil {
+		return err
+	}
+
+	cfg.Version = "31"
+	cfg.OpenID.JWKS = validator.JWKSArgs{
+		URL: &xnet.URL{},
+	}
+	cfg.Policy.OPA = iampolicy.OpaArgs{
+		URL:       &xnet.URL{},
+		AuthToken: "",
+	}
+
+	data, err = json.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	if err = saveConfig(context.Background(), objAPI, configFile, data); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘30’ to ‘31’. %v", err)
+	}
+
+	logger.Info(configMigrateMSGTemplate, configFile, "30", "31")
+	return nil
+}
+
+func migrateV31ToV32MinioSys(objAPI ObjectLayer) error {
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+
+	ok, data, err := checkConfigVersion(objAPI, configFile, "31")
+	if err == errConfigNotFound {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config file. %v", err)
+	}
+	if !ok {
+		return nil
+	}
+
+	cfg := &serverConfigV32{}
+	if err = json.Unmarshal(data, cfg); err != nil {
+		return err
+	}
+
+	cfg.Version = "32"
+	cfg.Notify.NSQ = make(map[string]target.NSQArgs)
+	cfg.Notify.NSQ["1"] = target.NSQArgs{}
+
+	data, err = json.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	if err = saveConfig(context.Background(), objAPI, configFile, data); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘31’ to ‘32’. %v", err)
+	}
+
+	logger.Info(configMigrateMSGTemplate, configFile, "31", "32")
+	return nil
+}
+
+func migrateV32ToV33MinioSys(objAPI ObjectLayer) error {
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+
+	ok, data, err := checkConfigVersion(objAPI, configFile, "32")
+	if err == errConfigNotFound {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config file. %v", err)
+	}
+	if !ok {
+		return nil
+	}
+
+	cfg := &serverConfigV33{}
+	if err = json.Unmarshal(data, cfg); err != nil {
+		return err
+	}
+
+	cfg.Version = "33"
+
+	data, err = json.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	if err = saveConfig(context.Background(), objAPI, configFile, data); err != nil {
+		return fmt.Errorf("Failed to migrate config from  32  to  33 . %v", err)
+	}
+
+	logger.Info(configMigrateMSGTemplate, configFile, "32", "33")
+	return nil
+}

cmd/config-migrate_test.go

@@ -25,15 +25,26 @@ import (
 
 // Test if config v1 is purged
 func TestServerConfigMigrateV1(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	objLayer, fsDir, err := prepareFS()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(fsDir)
+	err = newTestConfig(globalMinioDefaultRegion, objLayer)
 	if err != nil {
 		t.Fatalf("Init Test config failed")
 	}
-	// remove the root directory after the test ends.
+	rootPath, err := ioutil.TempDir(globalTestTmpDir, "minio-")
+	if err != nil {
+		t.Fatal(err)
+	}
 	defer os.RemoveAll(rootPath)
-
 	setConfigDir(rootPath)
 
+	globalObjLayerMutex.Lock()
+	globalObjectAPI = objLayer
+	globalObjLayerMutex.Unlock()
+
 	// Create a V1 config json file and store it
 	configJSON := "{ \"version\":\"1\", \"accessKeyId\":\"abcde\", \"secretAccessKey\":\"abcdefgh\"}"
 	configPath := rootPath + "/fsUsers.json"
@@ -45,13 +56,14 @@ func TestServerConfigMigrateV1(t *testing.T) {
 	if err := migrateConfig(); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}
+
 	// Check if config v1 is removed from filesystem
 	if _, err := os.Stat(configPath); err == nil || !os.IsNotExist(err) {
 		t.Fatal("Config V1 file is not purged")
 	}
 
 	// Initialize server config and check again if everything is fine
-	if err := loadConfig(); err != nil {
+	if err := loadConfig(objLayer); err != nil {
 		t.Fatalf("Unable to initialize from updated config file %s", err)
 	}
 }
@@ -59,20 +71,13 @@ func TestServerConfigMigrateV1(t *testing.T) {
 // Test if all migrate code returns nil when config file does not
 // exist
 func TestServerConfigMigrateInexistentConfig(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	rootPath, err := ioutil.TempDir(globalTestTmpDir, "minio-")
 	if err != nil {
-		t.Fatalf("Init Test config failed")
+		t.Fatal(err)
 	}
-	// remove the root directory after the test ends.
 	defer os.RemoveAll(rootPath)
 
 	setConfigDir(rootPath)
-	configPath := rootPath + "/" + minioConfigFile
-
-	// Remove config file
-	if err := os.Remove(configPath); err != nil {
-		t.Fatal("Unexpected error: ", err)
-	}
 
 	if err := migrateV2ToV3(); err != nil {
 		t.Fatal("migrate v2 to v3 should succeed when no config file is found")
@@ -134,18 +139,41 @@ func TestServerConfigMigrateInexistentConfig(t *testing.T) {
 	if err := migrateV21ToV22(); err != nil {
 		t.Fatal("migrate v21 to v22 should succeed when no config file is found")
 	}
+	if err := migrateV22ToV23(); err != nil {
+		t.Fatal("migrate v22 to v23 should succeed when no config file is found")
+	}
+	if err := migrateV23ToV24(); err != nil {
+		t.Fatal("migrate v23 to v24 should succeed when no config file is found")
+	}
+	if err := migrateV24ToV25(); err != nil {
+		t.Fatal("migrate v24 to v25 should succeed when no config file is found")
+	}
+	if err := migrateV25ToV26(); err != nil {
+		t.Fatal("migrate v25 to v26 should succeed when no config file is found")
+	}
+	if err := migrateV26ToV27(); err != nil {
+		t.Fatal("migrate v26 to v27 should succeed when no config file is found")
+	}
+	if err := migrateV27ToV28(); err != nil {
+		t.Fatal("migrate v27 to v28 should succeed when no config file is found")
+	}
 }
 
-// Test if a config migration from v2 to v23 is successfully done
-func TestServerConfigMigrateV2toV23(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+// Test if a config migration from v2 to v33 is successfully done
+func TestServerConfigMigrateV2toV33(t *testing.T) {
+	rootPath, err := ioutil.TempDir(globalTestTmpDir, "minio-")
 	if err != nil {
-		t.Fatalf("Init Test config failed")
+		t.Fatal(err)
 	}
-	// remove the root directory after the test ends.
 	defer os.RemoveAll(rootPath)
-
 	setConfigDir(rootPath)
+
+	objLayer, fsDir, err := prepareFS()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(fsDir)
+
 	configPath := rootPath + "/" + minioConfigFile
 
 	// Create a corrupted config file
@@ -171,8 +199,16 @@ func TestServerConfigMigrateV2toV23(t *testing.T) {
 		t.Fatal("Unexpected error: ", err)
 	}
 
+	if err := migrateConfigToMinioSys(objLayer); err != nil {
+		t.Fatal("Unexpected error: ", err)
+	}
+
+	if err := migrateMinioSysConfig(objLayer); err != nil {
+		t.Fatal("Unexpected error: ", err)
+	}
+
 	// Initialize server config and check again if everything is fine
-	if err := loadConfig(); err != nil {
+	if err := loadConfig(objLayer); err != nil {
 		t.Fatalf("Unable to initialize from updated config file %s", err)
 	}
 
@@ -186,6 +222,7 @@ func TestServerConfigMigrateV2toV23(t *testing.T) {
 	if globalServerConfig.Credential.AccessKey != accessKey {
 		t.Fatalf("Access key lost during migration, expected: %v, found:%v", accessKey, globalServerConfig.Credential.AccessKey)
 	}
+
 	if globalServerConfig.Credential.SecretKey != secretKey {
 		t.Fatalf("Secret key lost during migration, expected: %v, found: %v", secretKey, globalServerConfig.Credential.SecretKey)
 	}
@@ -193,13 +230,11 @@ func TestServerConfigMigrateV2toV23(t *testing.T) {
 
 // Test if all migrate code returns error with corrupted config files
 func TestServerConfigMigrateFaultyConfig(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	rootPath, err := ioutil.TempDir(globalTestTmpDir, "minio-")
 	if err != nil {
-		t.Fatalf("Init Test config failed")
+		t.Fatal(err)
 	}
-	// remove the root directory after the test ends.
 	defer os.RemoveAll(rootPath)
-
 	setConfigDir(rootPath)
 	configPath := rootPath + "/" + minioConfigFile
 
@@ -272,17 +307,30 @@ func TestServerConfigMigrateFaultyConfig(t *testing.T) {
 	if err := migrateV22ToV23(); err == nil {
 		t.Fatal("migrateConfigV22ToV23() should fail with a corrupted json")
 	}
+	if err := migrateV23ToV24(); err == nil {
+		t.Fatal("migrateConfigV23ToV24() should fail with a corrupted json")
+	}
+	if err := migrateV24ToV25(); err == nil {
+		t.Fatal("migrateConfigV24ToV25() should fail with a corrupted json")
+	}
+	if err := migrateV25ToV26(); err == nil {
+		t.Fatal("migrateConfigV25ToV26() should fail with a corrupted json")
+	}
+	if err := migrateV26ToV27(); err == nil {
+		t.Fatal("migrateConfigV26ToV27() should fail with a corrupted json")
+	}
+	if err := migrateV27ToV28(); err == nil {
+		t.Fatal("migrateConfigV27ToV28() should fail with a corrupted json")
+	}
 }
 
 // Test if all migrate code returns error with corrupted config files
 func TestServerConfigMigrateCorruptedConfig(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	rootPath, err := ioutil.TempDir(globalTestTmpDir, "minio-")
 	if err != nil {
-		t.Fatalf("Init Test config failed")
+		t.Fatal(err)
 	}
-	// remove the root directory after the test ends.
 	defer os.RemoveAll(rootPath)
-
 	setConfigDir(rootPath)
 	configPath := rootPath + "/" + minioConfigFile
 

cmd/config-versions.go

@@ -19,8 +19,11 @@ package cmd
 import (
 	"sync"
 
+	"github.com/minio/minio/cmd/crypto"
 	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/event/target"
+	"github.com/minio/minio/pkg/iam/policy"
+	"github.com/minio/minio/pkg/iam/validator"
 	"github.com/minio/minio/pkg/quick"
 )
 
@@ -370,7 +373,7 @@ type serverConfigV12 struct {
 	Notify notifierV2 `json:"notify"`
 }
 
-type notifier struct {
+type notifierV3 struct {
 	AMQP          map[string]target.AMQPArgs          `json:"amqp"`
 	Elasticsearch map[string]target.ElasticsearchArgs `json:"elasticsearch"`
 	Kafka         map[string]target.KafkaArgs         `json:"kafka"`
@@ -395,7 +398,7 @@ type serverConfigV13 struct {
 	Logger *loggerV7 `json:"logger"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // serverConfigV14 server configuration version '14' which is like
@@ -412,7 +415,7 @@ type serverConfigV14 struct {
 	Logger *loggerV7 `json:"logger"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // serverConfigV15 server configuration version '15' which is like
@@ -429,7 +432,7 @@ type serverConfigV15 struct {
 	Logger *loggerV7 `json:"logger"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // FileLogger is introduced to workaround the dependency about logrus
@@ -467,7 +470,7 @@ type serverConfigV16 struct {
 	Logger *loggers `json:"logger"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // serverConfigV17 server configuration version '17' which is like
@@ -486,7 +489,7 @@ type serverConfigV17 struct {
 	Logger *loggers `json:"logger"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // serverConfigV18 server configuration version '18' which is like
@@ -505,7 +508,7 @@ type serverConfigV18 struct {
 	Logger *loggers `json:"logger"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // serverConfigV19 server configuration version '19' which is like
@@ -523,7 +526,7 @@ type serverConfigV19 struct {
 	Logger *loggers `json:"logger"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // serverConfigV20 server configuration version '20' which is like
@@ -542,7 +545,7 @@ type serverConfigV20 struct {
 	Logger *loggers `json:"logger"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // serverConfigV21 is just like version '20' without logger field
@@ -557,7 +560,7 @@ type serverConfigV21 struct {
 	Domain     string           `json:"domain"`
 
 	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
+	Notify *notifierV3 `json:"notify"`
 }
 
 // serverConfigV22 is just like version '21' with added support
@@ -578,7 +581,7 @@ type serverConfigV22 struct {
 	StorageClass storageClassConfig `json:"storageclass"`
 
 	// Notification queue configuration.
-	Notify notifier `json:"notify"`
+	Notify notifierV3 `json:"notify"`
 }
 
 // serverConfigV23 is just like version '22' with addition of cache field.
@@ -601,7 +604,7 @@ type serverConfigV23 struct {
 	Cache CacheConfig `json:"cache"`
 
 	// Notification queue configuration.
-	Notify notifier `json:"notify"`
+	Notify notifierV3 `json:"notify"`
 }
 
 // serverConfigV24 is just like version '23', we had to revert
@@ -625,7 +628,7 @@ type serverConfigV24 struct {
 	Cache CacheConfig `json:"cache"`
 
 	// Notification queue configuration.
-	Notify notifier `json:"notify"`
+	Notify notifierV3 `json:"notify"`
 }
 
 // serverConfigV25 is just like version '24', stores additionally
@@ -652,14 +655,11 @@ type serverConfigV25 struct {
 	Cache CacheConfig `json:"cache"`
 
 	// Notification queue configuration.
-	Notify notifier `json:"notify"`
+	Notify notifierV3 `json:"notify"`
 }
 
 // serverConfigV26 is just like version '25', stores additionally
 // cache max use value in 'CacheConfig'.
-//
-// IMPORTANT NOTE: When updating this struct make sure that
-// serverConfig.ConfigDiff() is updated as necessary.
 type serverConfigV26 struct {
 	quick.Config `json:"-"` // ignore interfaces
 
@@ -679,5 +679,260 @@ type serverConfigV26 struct {
 	Cache CacheConfig `json:"cache"`
 
 	// Notification queue configuration.
-	Notify notifier `json:"notify"`
+	Notify notifierV3 `json:"notify"`
+}
+
+type loggerConsole struct {
+	Enabled bool `json:"enabled"`
+}
+
+type loggerHTTP struct {
+	Enabled  bool   `json:"enabled"`
+	Endpoint string `json:"endpoint"`
+}
+
+type loggerConfig struct {
+	Console loggerConsole         `json:"console"`
+	HTTP    map[string]loggerHTTP `json:"http"`
+}
+
+// serverConfigV27 is just like version '26', stores additionally
+// the logger field
+//
+// IMPORTANT NOTE: When updating this struct make sure that
+// serverConfig.ConfigDiff() is updated as necessary.
+type serverConfigV27 struct {
+	quick.Config `json:"-"` // ignore interfaces
+
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BoolFlag         `json:"browser"`
+	Worm       BoolFlag         `json:"worm"`
+	Domain     string           `json:"domain"`
+
+	// Storage class configuration
+	StorageClass storageClassConfig `json:"storageclass"`
+
+	// Cache configuration
+	Cache CacheConfig `json:"cache"`
+
+	// Notification queue configuration.
+	Notify notifierV3 `json:"notify"`
+
+	// Logger configuration
+	Logger loggerConfig `json:"logger"`
+}
+
+// serverConfigV28 is just like version '27', additionally
+// storing KMS config
+//
+// IMPORTANT NOTE: When updating this struct make sure that
+// serverConfig.ConfigDiff() is updated as necessary.
+type serverConfigV28 struct {
+	quick.Config `json:"-"` // ignore interfaces
+
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Worm       BoolFlag         `json:"worm"`
+
+	// Storage class configuration
+	StorageClass storageClassConfig `json:"storageclass"`
+
+	// Cache configuration
+	Cache CacheConfig `json:"cache"`
+
+	// KMS configuration
+	KMS crypto.KMSConfig `json:"kms"`
+
+	// Notification queue configuration.
+	Notify notifierV3 `json:"notify"`
+
+	// Logger configuration
+	Logger loggerConfig `json:"logger"`
+}
+
+// serverConfigV29 is just like version '28'.
+type serverConfigV29 serverConfigV28
+
+// compressionConfig represents the compression settings.
+type compressionConfig struct {
+	Enabled    bool     `json:"enabled"`
+	Extensions []string `json:"extensions"`
+	MimeTypes  []string `json:"mime-types"`
+}
+
+// serverConfigV30 is just like version '29', stores additionally
+// extensions and mimetypes fields for compression.
+type serverConfigV30 struct {
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Worm       BoolFlag         `json:"worm"`
+
+	// Storage class configuration
+	StorageClass storageClassConfig `json:"storageclass"`
+
+	// Cache configuration
+	Cache CacheConfig `json:"cache"`
+
+	// KMS configuration
+	KMS crypto.KMSConfig `json:"kms"`
+
+	// Notification queue configuration.
+	Notify notifierV3 `json:"notify"`
+
+	// Logger configuration
+	Logger loggerConfig `json:"logger"`
+
+	// Compression configuration
+	Compression compressionConfig `json:"compress"`
+}
+
+// serverConfigV31 is just like version '30', with OPA and OpenID configuration.
+type serverConfigV31 struct {
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Worm       BoolFlag         `json:"worm"`
+
+	// Storage class configuration
+	StorageClass storageClassConfig `json:"storageclass"`
+
+	// Cache configuration
+	Cache CacheConfig `json:"cache"`
+
+	// KMS configuration
+	KMS crypto.KMSConfig `json:"kms"`
+
+	// Notification queue configuration.
+	Notify notifierV3 `json:"notify"`
+
+	// Logger configuration
+	Logger loggerConfig `json:"logger"`
+
+	// Compression configuration
+	Compression compressionConfig `json:"compress"`
+
+	// OpenID configuration
+	OpenID struct {
+		// JWKS validator config.
+		JWKS validator.JWKSArgs `json:"jwks"`
+	} `json:"openid"`
+
+	// External policy enforcements.
+	Policy struct {
+		// OPA configuration.
+		OPA iampolicy.OpaArgs `json:"opa"`
+
+		// Add new external policy enforcements here.
+	} `json:"policy"`
+}
+
+type notifier struct {
+	AMQP          map[string]target.AMQPArgs          `json:"amqp"`
+	Elasticsearch map[string]target.ElasticsearchArgs `json:"elasticsearch"`
+	Kafka         map[string]target.KafkaArgs         `json:"kafka"`
+	MQTT          map[string]target.MQTTArgs          `json:"mqtt"`
+	MySQL         map[string]target.MySQLArgs         `json:"mysql"`
+	NATS          map[string]target.NATSArgs          `json:"nats"`
+	NSQ           map[string]target.NSQArgs           `json:"nsq"`
+	PostgreSQL    map[string]target.PostgreSQLArgs    `json:"postgresql"`
+	Redis         map[string]target.RedisArgs         `json:"redis"`
+	Webhook       map[string]target.WebhookArgs       `json:"webhook"`
+}
+
+// serverConfigV32 is just like version '31' with added nsq notifer.
+type serverConfigV32 struct {
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Worm       BoolFlag         `json:"worm"`
+
+	// Storage class configuration
+	StorageClass storageClassConfig `json:"storageclass"`
+
+	// Cache configuration
+	Cache CacheConfig `json:"cache"`
+
+	// KMS configuration
+	KMS crypto.KMSConfig `json:"kms"`
+
+	// Notification queue configuration.
+	Notify notifier `json:"notify"`
+
+	// Logger configuration
+	Logger loggerConfig `json:"logger"`
+
+	// Compression configuration
+	Compression compressionConfig `json:"compress"`
+
+	// OpenID configuration
+	OpenID struct {
+		// JWKS validator config.
+		JWKS validator.JWKSArgs `json:"jwks"`
+	} `json:"openid"`
+
+	// External policy enforcements.
+	Policy struct {
+		// OPA configuration.
+		OPA iampolicy.OpaArgs `json:"opa"`
+
+		// Add new external policy enforcements here.
+	} `json:"policy"`
+}
+
+// serverConfigV33 is just like version '32', removes clientID from NATS.
+type serverConfigV33 struct {
+	quick.Config `json:"-"` // ignore interfaces
+
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Worm       BoolFlag         `json:"worm"`
+
+	// Storage class configuration
+	StorageClass storageClassConfig `json:"storageclass"`
+
+	// Cache configuration
+	Cache CacheConfig `json:"cache"`
+
+	// KMS configuration
+	KMS crypto.KMSConfig `json:"kms"`
+
+	// Notification queue configuration.
+	Notify notifier `json:"notify"`
+
+	// Logger configuration
+	Logger loggerConfig `json:"logger"`
+
+	// Compression configuration
+	Compression compressionConfig `json:"compress"`
+
+	// OpenID configuration
+	OpenID struct {
+		// JWKS validator config.
+		JWKS validator.JWKSArgs `json:"jwks"`
+	} `json:"openid"`
+
+	// External policy enforcements.
+	Policy struct {
+		// OPA configuration.
+		OPA iampolicy.OpaArgs `json:"opa"`
+
+		// Add new external policy enforcements here.
+	} `json:"policy"`
 }

cmd/config.go

@@ -0,0 +1,214 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"os"
+	"path"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/minio/minio/cmd/logger"
+	"github.com/minio/minio/pkg/quick"
+)
+
+const (
+	minioConfigPrefix = "config"
+
+	// Minio configuration file.
+	minioConfigFile = "config.json"
+
+	// Minio backup file
+	minioConfigBackupFile = minioConfigFile + ".backup"
+)
+
+func saveServerConfig(ctx context.Context, objAPI ObjectLayer, config *serverConfig) error {
+	if err := quick.CheckData(config); err != nil {
+		return err
+	}
+
+	data, err := json.MarshalIndent(config, "", "\t")
+	if err != nil {
+		return err
+	}
+
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+	if globalEtcdClient != nil {
+		timeoutCtx, cancel := context.WithTimeout(ctx, 5*time.Minute)
+		_, err = globalEtcdClient.Put(timeoutCtx, configFile, string(data))
+		defer cancel()
+		return err
+	}
+
+	// Create a backup of the current config
+	oldData, err := readConfig(ctx, objAPI, configFile)
+	if err == nil {
+		backupConfigFile := path.Join(minioConfigPrefix, minioConfigBackupFile)
+		if err = saveConfig(ctx, objAPI, backupConfigFile, oldData); err != nil {
+			return err
+		}
+	} else {
+		if err != errConfigNotFound {
+			return err
+		}
+	}
+
+	// Save the new config in the std config path
+	return saveConfig(ctx, objAPI, configFile, data)
+}
+
+func readServerConfig(ctx context.Context, objAPI ObjectLayer) (*serverConfig, error) {
+	var configData []byte
+	var err error
+
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+	if globalEtcdClient != nil {
+		configData, err = readConfigEtcd(ctx, globalEtcdClient, configFile)
+	} else {
+		configData, err = readConfig(ctx, objAPI, configFile)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	if runtime.GOOS == "windows" {
+		configData = bytes.Replace(configData, []byte("\r\n"), []byte("\n"), -1)
+	}
+
+	if err = quick.CheckDuplicateKeys(string(configData)); err != nil {
+		return nil, err
+	}
+
+	var config = &serverConfig{}
+	if err = json.Unmarshal(configData, config); err != nil {
+		return nil, err
+	}
+
+	if err = quick.CheckData(config); err != nil {
+		return nil, err
+	}
+
+	return config, nil
+}
+
+// ConfigSys - config system.
+type ConfigSys struct{}
+
+// Load - load config.json.
+func (sys *ConfigSys) Load(objAPI ObjectLayer) error {
+	return sys.Init(objAPI)
+}
+
+// Init - initializes config system from config.json.
+func (sys *ConfigSys) Init(objAPI ObjectLayer) error {
+	if objAPI == nil {
+		return errInvalidArgument
+	}
+
+	doneCh := make(chan struct{})
+	defer close(doneCh)
+
+	// Initializing configuration needs a retry mechanism for
+	// the following reasons:
+	//  - Read quorum is lost just after the initialization
+	//    of the object layer.
+	//  - Write quorum not met when upgrading configuration
+	//    version is needed.
+	retryTimerCh := newRetryTimerSimple(doneCh)
+	for {
+		select {
+		case _ = <-retryTimerCh:
+			err := initConfig(objAPI)
+			if err != nil {
+				if strings.Contains(err.Error(), InsufficientReadQuorum{}.Error()) ||
+					strings.Contains(err.Error(), InsufficientWriteQuorum{}.Error()) {
+					logger.Info("Waiting for configuration to be initialized..")
+					continue
+				}
+				return err
+			}
+
+			return nil
+		}
+	}
+}
+
+// NewConfigSys - creates new config system object.
+func NewConfigSys() *ConfigSys {
+	return &ConfigSys{}
+}
+
+// Initialize and load config from remote etcd or local config directory
+func initConfig(objAPI ObjectLayer) error {
+	if objAPI == nil {
+		return errServerNotInitialized
+	}
+
+	if globalEtcdClient != nil {
+		ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+		resp, err := globalEtcdClient.Get(ctx, getConfigFile())
+		cancel()
+		if err == nil && resp.Count > 0 {
+			if err = migrateConfig(); err != nil {
+				return err
+			}
+
+			// Migrates etcd ${HOME}/.minio/config.json to '/config/config.json'
+			if err := migrateConfigToMinioSys(objAPI); err != nil {
+				return err
+			}
+		}
+	} else {
+		if isFile(getConfigFile()) {
+			if err := migrateConfig(); err != nil {
+				return err
+			}
+		}
+		// Migrates ${HOME}/.minio/config.json or config.json.deprecated
+		// to '<export_path>/.minio.sys/config/config.json'
+		// ignore if the file doesn't exist.
+		if err := migrateConfigToMinioSys(objAPI); err != nil && !os.IsNotExist(err) {
+			return err
+		}
+	}
+
+	configFile := path.Join(minioConfigPrefix, minioConfigFile)
+
+	// Watch config for changes and reloads them in-memory.
+	go watchConfig(objAPI, configFile, loadConfig)
+
+	if err := checkConfig(context.Background(), objAPI, configFile); err != nil {
+		if err == errConfigNotFound {
+			// Config file does not exist, we create it fresh and return upon success.
+			if err = newSrvConfig(objAPI); err != nil {
+				return err
+			}
+		} else {
+			return err
+		}
+	}
+
+	if err := migrateMinioSysConfig(objAPI); err != nil {
+		return err
+	}
+
+	return loadConfig(objAPI)
+}

cmd/copy-part-range.go

@@ -17,90 +17,52 @@
 package cmd
 
 import (
-	"fmt"
 	"net/http"
 	"net/url"
-	"strconv"
-	"strings"
 )
 
 // Writes S3 compatible copy part range error.
-func writeCopyPartErr(w http.ResponseWriter, err error, url *url.URL) {
+func writeCopyPartErr(w http.ResponseWriter, err error, url *url.URL, browser bool) {
 	switch err {
 	case errInvalidRange:
-		writeErrorResponse(w, ErrInvalidCopyPartRange, url)
+		writeErrorResponse(w, ErrInvalidCopyPartRange, url, browser)
 		return
 	case errInvalidRangeSource:
-		writeErrorResponse(w, ErrInvalidCopyPartRangeSource, url)
+		writeErrorResponse(w, ErrInvalidCopyPartRangeSource, url, browser)
 		return
 	default:
-		writeErrorResponse(w, ErrInternalError, url)
+		writeErrorResponse(w, ErrInternalError, url, browser)
 		return
 	}
 }
 
-// Parses x-amz-copy-source-range for CopyObjectPart API. Specifically written to
-// differentiate the behavior between regular httpRange header v/s x-amz-copy-source-range.
-// The range of bytes to copy from the source object. The range value must use the form
-// bytes=first-last, where the first and last are the zero-based byte offsets to copy.
-// For example, bytes=0-9 indicates that you want to copy the first ten bytes of the source.
+// Parses x-amz-copy-source-range for CopyObjectPart API. Its behavior
+// is different from regular HTTP range header. It only supports the
+// form `bytes=first-last` where first and last are zero-based byte
+// offsets. See
 // http://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPartCopy.html
-func parseCopyPartRange(rangeString string, resourceSize int64) (hrange *httpRange, err error) {
-	// Return error if given range string doesn't start with byte range prefix.
-	if !strings.HasPrefix(rangeString, byteRangePrefix) {
-		return nil, fmt.Errorf("'%s' does not start with '%s'", rangeString, byteRangePrefix)
+// for full details. This function treats an empty rangeString as
+// referring to the whole resource.
+func parseCopyPartRangeSpec(rangeString string) (hrange *HTTPRangeSpec, err error) {
+	hrange, err = parseRequestRangeSpec(rangeString)
+	if err != nil {
+		return nil, err
 	}
-
-	// Trim byte range prefix.
-	byteRangeString := strings.TrimPrefix(rangeString, byteRangePrefix)
-
-	// Check if range string contains delimiter '-', else return error. eg. "bytes=8"
-	sepIndex := strings.Index(byteRangeString, "-")
-	if sepIndex == -1 {
+	if hrange.IsSuffixLength || hrange.Start < 0 || hrange.End < 0 {
 		return nil, errInvalidRange
 	}
-
-	offsetBeginString := byteRangeString[:sepIndex]
-	offsetBegin := int64(-1)
-	// Convert offsetBeginString only if its not empty.
-	if len(offsetBeginString) > 0 {
-		if !validBytePos.MatchString(offsetBeginString) {
-			return nil, errInvalidRange
-		}
-		if offsetBegin, err = strconv.ParseInt(offsetBeginString, 10, 64); err != nil {
-			return nil, errInvalidRange
-		}
-	}
-
-	offsetEndString := byteRangeString[sepIndex+1:]
-	offsetEnd := int64(-1)
-	// Convert offsetEndString only if its not empty.
-	if len(offsetEndString) > 0 {
-		if !validBytePos.MatchString(offsetEndString) {
-			return nil, errInvalidRange
-		}
-		if offsetEnd, err = strconv.ParseInt(offsetEndString, 10, 64); err != nil {
-			return nil, errInvalidRange
-		}
-	}
-
-	// rangeString contains first byte positions. eg. "bytes=2-" or
-	// rangeString contains last bye positions. eg. "bytes=-2"
-	if offsetBegin == -1 || offsetEnd == -1 {
-		return nil, errInvalidRange
-	}
-
-	// Last byte position should not be greater than first byte
-	// position. eg. "bytes=5-2"
-	if offsetBegin > offsetEnd {
-		return nil, errInvalidRange
-	}
-
-	// First and last byte positions should not be >= resourceSize.
-	if offsetBegin >= resourceSize || offsetEnd >= resourceSize {
-		return nil, errInvalidRangeSource
-	}
-
-	// Success..
-	return &httpRange{offsetBegin, offsetEnd, resourceSize}, nil
+	return hrange, nil
+}
+
+// checkCopyPartRangeWithSize adds more check to the range string in case of
+// copy object part. This API requires having specific start and end  range values
+// e.g. 'bytes=3-10'. Other use cases will be rejected.
+func checkCopyPartRangeWithSize(rs *HTTPRangeSpec, resourceSize int64) (err error) {
+	if rs == nil {
+		return nil
+	}
+	if rs.IsSuffixLength || rs.Start >= resourceSize || rs.End >= resourceSize {
+		return errInvalidRangeSource
+	}
+	return nil
 }

cmd/copy-part-range_test.go

@@ -19,35 +19,37 @@ package cmd
 import "testing"
 
 // Test parseCopyPartRange()
-func TestParseCopyPartRange(t *testing.T) {
+func TestParseCopyPartRangeSpec(t *testing.T) {
 	// Test success cases.
 	successCases := []struct {
 		rangeString string
 		offsetBegin int64
 		offsetEnd   int64
-		length      int64
 	}{
-		{"bytes=2-5", 2, 5, 4},
-		{"bytes=2-9", 2, 9, 8},
-		{"bytes=2-2", 2, 2, 1},
-		{"bytes=0000-0006", 0, 6, 7},
+		{"bytes=2-5", 2, 5},
+		{"bytes=2-9", 2, 9},
+		{"bytes=2-2", 2, 2},
+		{"bytes=0000-0006", 0, 6},
 	}
+	objectSize := int64(10)
 
 	for _, successCase := range successCases {
-		hrange, err := parseCopyPartRange(successCase.rangeString, 10)
+		rs, err := parseCopyPartRangeSpec(successCase.rangeString)
 		if err != nil {
 			t.Fatalf("expected: <nil>, got: %s", err)
 		}
 
-		if hrange.offsetBegin != successCase.offsetBegin {
-			t.Fatalf("expected: %d, got: %d", successCase.offsetBegin, hrange.offsetBegin)
+		start, length, err1 := rs.GetOffsetLength(objectSize)
+		if err1 != nil {
+			t.Fatalf("expected: <nil>, got: %s", err1)
 		}
 
-		if hrange.offsetEnd != successCase.offsetEnd {
-			t.Fatalf("expected: %d, got: %d", successCase.offsetEnd, hrange.offsetEnd)
+		if start != successCase.offsetBegin {
+			t.Fatalf("expected: %d, got: %d", successCase.offsetBegin, start)
 		}
-		if hrange.getLength() != successCase.length {
-			t.Fatalf("expected: %d, got: %d", successCase.length, hrange.getLength())
+
+		if start+length-1 != successCase.offsetEnd {
+			t.Fatalf("expected: %d, got: %d", successCase.offsetEnd, start+length-1)
 		}
 	}
 
@@ -59,15 +61,16 @@ func TestParseCopyPartRange(t *testing.T) {
 		"bytes=2-+5",
 		"bytes=2--5",
 		"bytes=-",
-		"",
 		"2-5",
 		"bytes = 2-5",
 		"bytes=2 - 5",
 		"bytes=0-0,-1",
 		"bytes=2-5 ",
+		"bytes=-1",
+		"bytes=1-",
 	}
 	for _, rangeString := range invalidRangeStrings {
-		if _, err := parseCopyPartRange(rangeString, 10); err == nil {
+		if _, err := parseCopyPartRangeSpec(rangeString); err == nil {
 			t.Fatalf("expected: an error, got: <nil> for range %s", rangeString)
 		}
 	}
@@ -78,8 +81,14 @@ func TestParseCopyPartRange(t *testing.T) {
 		"bytes=20-30",
 	}
 	for _, rangeString := range errorRangeString {
-		if _, err := parseCopyPartRange(rangeString, 10); err != errInvalidRangeSource {
-			t.Fatalf("expected: %s, got: %s", errInvalidRangeSource, err)
+		rs, err := parseCopyPartRangeSpec(rangeString)
+		if err == nil {
+			err1 := checkCopyPartRangeWithSize(rs, objectSize)
+			if err1 != errInvalidRangeSource {
+				t.Fatalf("expected: %s, got: %s", errInvalidRangeSource, err)
+			}
+		} else {
+			t.Fatalf("expected: %s, got: <nil>", errInvalidRangeSource)
 		}
 	}
 }

cmd/crypto/config.go

@@ -0,0 +1,21 @@
+// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crypto
+
+// KMSConfig has the KMS config for hashicorp vault
+type KMSConfig struct {
+	AutoEncryption bool        `json:"-"`
+	Vault          VaultConfig `json:"vault"`
+}

cmd/crypto/error.go

@@ -16,8 +16,56 @@ package crypto
 
 import "errors"
 
+// Error is the generic type for any error happening during decrypting
+// an object. It indicates that the object itself or its metadata was
+// modified accidentally or maliciously.
+type Error struct{ msg string }
+
+func (e Error) Error() string { return e.msg }
+
 var (
 	// ErrInvalidEncryptionMethod indicates that the specified SSE encryption method
 	// is not supported.
 	ErrInvalidEncryptionMethod = errors.New("The encryption method is not supported")
+
+	// ErrInvalidCustomerAlgorithm indicates that the specified SSE-C algorithm
+	// is not supported.
+	ErrInvalidCustomerAlgorithm = errors.New("The SSE-C algorithm is not supported")
+
+	// ErrMissingCustomerKey indicates that the HTTP headers contains no SSE-C client key.
+	ErrMissingCustomerKey = errors.New("The SSE-C request is missing the customer key")
+
+	// ErrMissingCustomerKeyMD5 indicates that the HTTP headers contains no SSE-C client key
+	// MD5 checksum.
+	ErrMissingCustomerKeyMD5 = errors.New("The SSE-C request is missing the customer key MD5")
+
+	// ErrInvalidCustomerKey indicates that the SSE-C client key is not valid - e.g. not a
+	// base64-encoded string or not 256 bits long.
+	ErrInvalidCustomerKey = errors.New("The SSE-C client key is invalid")
+
+	// ErrSecretKeyMismatch indicates that the provided secret key (SSE-C client key / SSE-S3 KMS key)
+	// does not match the secret key used during encrypting the object.
+	ErrSecretKeyMismatch = errors.New("The secret key does not match the secret key used during upload")
+
+	// ErrCustomerKeyMD5Mismatch indicates that the SSE-C key MD5 does not match the
+	// computed MD5 sum. This means that the client provided either the wrong key for
+	// a certain MD5 checksum or the wrong MD5 for a certain key.
+	ErrCustomerKeyMD5Mismatch = errors.New("The provided SSE-C key MD5 does not match the computed MD5 of the SSE-C key")
+	// ErrIncompatibleEncryptionMethod indicates that both SSE-C headers and SSE-S3 headers were specified, and are incompatible
+	// The client needs to remove the SSE-S3 header or the SSE-C headers
+	ErrIncompatibleEncryptionMethod = errors.New("Server side encryption specified with both SSE-C and SSE-S3 headers")
+)
+
+var (
+	errMissingInternalIV            = Error{"The object metadata is missing the internal encryption IV"}
+	errMissingInternalSealAlgorithm = Error{"The object metadata is missing the internal seal algorithm"}
+
+	errInvalidInternalIV            = Error{"The internal encryption IV is malformed"}
+	errInvalidInternalSealAlgorithm = Error{"The internal seal algorithm is invalid and not supported"}
+)
+
+var (
+	// errOutOfEntropy indicates that the a source of randomness (PRNG) wasn't able
+	// to produce enough random data. This is fatal error and should cause a panic.
+	errOutOfEntropy = errors.New("Unable to read enough randomness from the system")
 )

cmd/crypto/header.go

@@ -15,16 +15,72 @@
 package crypto
 
 import (
+	"bytes"
+	"crypto/md5"
+	"encoding/base64"
 	"net/http"
+	"strings"
 )
 
 // SSEHeader is the general AWS SSE HTTP header key.
 const SSEHeader = "X-Amz-Server-Side-Encryption"
 
-// SSEAlgorithmAES256 is the only supported value for the SSE-S3 or SSE-C algorithm header.
-// For SSE-S3 see: https://docs.aws.amazon.com/AmazonS3/latest/dev/SSEUsingRESTAPI.html
-// For SSE-C  see: https://docs.aws.amazon.com/AmazonS3/latest/dev/ServerSideEncryptionCustomerKeys.html
-const SSEAlgorithmAES256 = "AES256"
+const (
+	// SSEKmsID is the HTTP header key referencing the SSE-KMS
+	// key ID.
+	SSEKmsID = SSEHeader + "-Aws-Kms-Key-Id"
+
+	// SSEKmsContext is the HTTP header key referencing the
+	// SSE-KMS encryption context.
+	SSEKmsContext = SSEHeader + "-Context"
+)
+
+const (
+	// SSECAlgorithm is the HTTP header key referencing
+	// the SSE-C algorithm.
+	SSECAlgorithm = SSEHeader + "-Customer-Algorithm"
+
+	// SSECKey is the HTTP header key referencing the
+	// SSE-C client-provided key..
+	SSECKey = SSEHeader + "-Customer-Key"
+
+	// SSECKeyMD5 is the HTTP header key referencing
+	// the MD5 sum of the client-provided key.
+	SSECKeyMD5 = SSEHeader + "-Customer-Key-Md5"
+)
+
+const (
+	// SSECopyAlgorithm is the HTTP header key referencing
+	// the SSE-C algorithm for SSE-C copy requests.
+	SSECopyAlgorithm = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm"
+
+	// SSECopyKey is the HTTP header key referencing the SSE-C
+	// client-provided key for SSE-C copy requests.
+	SSECopyKey = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key"
+
+	// SSECopyKeyMD5 is the HTTP header key referencing the
+	// MD5 sum of the client key for SSE-C copy requests.
+	SSECopyKeyMD5 = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5"
+)
+
+const (
+	// SSEAlgorithmAES256 is the only supported value for the SSE-S3 or SSE-C algorithm header.
+	// For SSE-S3 see: https://docs.aws.amazon.com/AmazonS3/latest/dev/SSEUsingRESTAPI.html
+	// For SSE-C  see: https://docs.aws.amazon.com/AmazonS3/latest/dev/ServerSideEncryptionCustomerKeys.html
+	SSEAlgorithmAES256 = "AES256"
+
+	// SSEAlgorithmKMS is the value of 'X-Amz-Server-Side-Encryption' for SSE-KMS.
+	// See: https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingKMSEncryption.html
+	SSEAlgorithmKMS = "aws:kms"
+)
+
+// RemoveSensitiveHeaders removes confidential encryption
+// information - e.g. the SSE-C key - from the HTTP headers.
+// It has the same semantics as RemoveSensitiveEntires.
+func RemoveSensitiveHeaders(h http.Header) {
+	h.Del(SSECKey)
+	h.Del(SSECopyKey)
+}
 
 // S3 represents AWS SSE-S3. It provides functionality to handle
 // SSE-S3 requests.
@@ -36,14 +92,129 @@ type s3 struct{}
 // the S3 client requests SSE-S3.
 func (s3) IsRequested(h http.Header) bool {
 	_, ok := h[SSEHeader]
-	return ok
+	return ok && strings.ToLower(h.Get(SSEHeader)) != SSEAlgorithmKMS // Return only true if the SSE header is specified and does not contain the SSE-KMS value
 }
 
-// Parse parses the SSE-S3 related HTTP headers and checks
+// ParseHTTP parses the SSE-S3 related HTTP headers and checks
 // whether they contain valid values.
-func (s3) Parse(h http.Header) (err error) {
+func (s3) ParseHTTP(h http.Header) (err error) {
 	if h.Get(SSEHeader) != SSEAlgorithmAES256 {
 		err = ErrInvalidEncryptionMethod
 	}
 	return
 }
+
+// S3KMS represents AWS SSE-KMS. It provides functionality to
+// handle SSE-KMS requests.
+var S3KMS = s3KMS{}
+
+type s3KMS struct{}
+
+// IsRequested returns true if the HTTP headers indicates that
+// the S3 client requests SSE-KMS.
+func (s3KMS) IsRequested(h http.Header) bool {
+	if _, ok := h[SSEKmsID]; ok {
+		return true
+	}
+	if _, ok := h[SSEKmsContext]; ok {
+		return true
+	}
+	if _, ok := h[SSEHeader]; ok {
+		return strings.ToUpper(h.Get(SSEHeader)) != SSEAlgorithmAES256 // Return only true if the SSE header is specified and does not contain the SSE-S3 value
+	}
+	return false
+}
+
+var (
+	// SSEC represents AWS SSE-C. It provides functionality to handle
+	// SSE-C requests.
+	SSEC = ssec{}
+
+	// SSECopy represents AWS SSE-C for copy requests. It provides
+	// functionality to handle SSE-C copy requests.
+	SSECopy = ssecCopy{}
+)
+
+type ssec struct{}
+type ssecCopy struct{}
+
+// IsRequested returns true if the HTTP headers contains
+// at least one SSE-C header. SSE-C copy headers are ignored.
+func (ssec) IsRequested(h http.Header) bool {
+	if _, ok := h[SSECAlgorithm]; ok {
+		return true
+	}
+	if _, ok := h[SSECKey]; ok {
+		return true
+	}
+	if _, ok := h[SSECKeyMD5]; ok {
+		return true
+	}
+	return false
+}
+
+// IsRequested returns true if the HTTP headers contains
+// at least one SSE-C copy header. Regular SSE-C headers
+// are ignored.
+func (ssecCopy) IsRequested(h http.Header) bool {
+	if _, ok := h[SSECopyAlgorithm]; ok {
+		return true
+	}
+	if _, ok := h[SSECopyKey]; ok {
+		return true
+	}
+	if _, ok := h[SSECopyKeyMD5]; ok {
+		return true
+	}
+	return false
+}
+
+// ParseHTTP parses the SSE-C headers and returns the SSE-C client key
+// on success. SSE-C copy headers are ignored.
+func (ssec) ParseHTTP(h http.Header) (key [32]byte, err error) {
+	if h.Get(SSECAlgorithm) != SSEAlgorithmAES256 {
+		return key, ErrInvalidCustomerAlgorithm
+	}
+	if h.Get(SSECKey) == "" {
+		return key, ErrMissingCustomerKey
+	}
+	if h.Get(SSECKeyMD5) == "" {
+		return key, ErrMissingCustomerKeyMD5
+	}
+
+	clientKey, err := base64.StdEncoding.DecodeString(h.Get(SSECKey))
+	if err != nil || len(clientKey) != 32 { // The client key must be 256 bits long
+		return key, ErrInvalidCustomerKey
+	}
+	keyMD5, err := base64.StdEncoding.DecodeString(h.Get(SSECKeyMD5))
+	if md5Sum := md5.Sum(clientKey); err != nil || !bytes.Equal(md5Sum[:], keyMD5) {
+		return key, ErrCustomerKeyMD5Mismatch
+	}
+	copy(key[:], clientKey)
+	return key, nil
+}
+
+// ParseHTTP parses the SSE-C copy headers and returns the SSE-C client key
+// on success. Regular SSE-C headers are ignored.
+func (ssecCopy) ParseHTTP(h http.Header) (key [32]byte, err error) {
+	if h.Get(SSECopyAlgorithm) != SSEAlgorithmAES256 {
+		return key, ErrInvalidCustomerAlgorithm
+	}
+	if h.Get(SSECopyKey) == "" {
+		return key, ErrMissingCustomerKey
+	}
+	if h.Get(SSECopyKeyMD5) == "" {
+		return key, ErrMissingCustomerKeyMD5
+	}
+
+	clientKey, err := base64.StdEncoding.DecodeString(h.Get(SSECopyKey))
+	if err != nil || len(clientKey) != 32 { // The client key must be 256 bits long
+		return key, ErrInvalidCustomerKey
+	}
+	keyMD5, err := base64.StdEncoding.DecodeString(h.Get(SSECopyKeyMD5))
+	if md5Sum := md5.Sum(clientKey); err != nil || !bytes.Equal(md5Sum[:], keyMD5) {
+		return key, ErrCustomerKeyMD5Mismatch
+	}
+	copy(key[:], clientKey)
+	return key, nil
+}

cmd/crypto/header_test.go

@@ -16,28 +16,64 @@ package crypto
 
 import (
 	"net/http"
+	"sort"
 	"testing"
 )
 
-var isRequestedTests = []struct {
+var kmsIsRequestedTests = []struct {
 	Header   http.Header
 	Expected bool
 }{
-	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{"AES256"}}, Expected: true},  // 0
-	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{"AES-256"}}, Expected: true}, // 1
-	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{""}}, Expected: true},        // 2
-	{Header: http.Header{"X-Amz-Server-Side-Encryptio": []string{"AES256"}}, Expected: false},  // 3
+	{Header: http.Header{}, Expected: false},                                                                                     // 0
+	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{"aws:kms"}}, Expected: true},                                   // 1
+	{Header: http.Header{"X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id": []string{"0839-9047947-844842874-481"}}, Expected: true}, // 2
+	{Header: http.Header{"X-Amz-Server-Side-Encryption-Context": []string{"7PpPLAK26ONlVUGOWlusfg=="}}, Expected: true},          // 3
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption":                []string{""},
+			"X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id": []string{""},
+			"X-Amz-Server-Side-Encryption-Context":        []string{""},
+		},
+		Expected: true,
+	}, // 4
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption":                []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Aws-Kms-Key-Id": []string{""},
+		},
+		Expected: true,
+	}, // 5
+	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{"AES256"}}, Expected: false}, // 6
+}
+
+func TestKMSIsRequested(t *testing.T) {
+	for i, test := range kmsIsRequestedTests {
+		if got := S3KMS.IsRequested(test.Header); got != test.Expected {
+			t.Errorf("Test %d: Wanted %v but got %v", i, test.Expected, got)
+		}
+	}
+}
+
+var s3IsRequestedTests = []struct {
+	Header   http.Header
+	Expected bool
+}{
+	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{"AES256"}}, Expected: true},         // 0
+	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{"AES-256"}}, Expected: true},        // 1
+	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{""}}, Expected: true},               // 2
+	{Header: http.Header{"X-Amz-Server-Side-Encryptio": []string{"AES256"}}, Expected: false},         // 3
+	{Header: http.Header{"X-Amz-Server-Side-Encryption": []string{SSEAlgorithmKMS}}, Expected: false}, // 4
 }
 
 func TestS3IsRequested(t *testing.T) {
-	for i, test := range isRequestedTests {
+	for i, test := range s3IsRequestedTests {
 		if got := S3.IsRequested(test.Header); got != test.Expected {
 			t.Errorf("Test %d: Wanted %v but got %v", i, test.Expected, got)
 		}
 	}
 }
 
-var parseTests = []struct {
+var s3ParseTests = []struct {
 	Header      http.Header
 	ExpectedErr error
 }{
@@ -48,9 +84,353 @@ var parseTests = []struct {
 }
 
 func TestS3Parse(t *testing.T) {
-	for i, test := range parseTests {
-		if err := S3.Parse(test.Header); err != test.ExpectedErr {
+	for i, test := range s3ParseTests {
+		if err := S3.ParseHTTP(test.Header); err != test.ExpectedErr {
 			t.Errorf("Test %d: Wanted '%v' but got '%v'", i, test.ExpectedErr, err)
 		}
 	}
 }
+
+var ssecIsRequestedTests = []struct {
+	Header   http.Header
+	Expected bool
+}{
+	{Header: http.Header{}, Expected: false},                                                                                                     // 0
+	{Header: http.Header{"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"}}, Expected: true},                                 // 1
+	{Header: http.Header{"X-Amz-Server-Side-Encryption-Customer-Key": []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="}}, Expected: true}, // 2
+	{Header: http.Header{"X-Amz-Server-Side-Encryption-Customer-Key-Md5": []string{"7PpPLAK26ONlVUGOWlusfg=="}}, Expected: true},                 // 3
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{""},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{""},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{""},
+		},
+		Expected: true,
+	}, // 4
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Expected: true,
+	}, // 5
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Expected: false,
+	}, // 6
+}
+
+func TestSSECIsRequested(t *testing.T) {
+	for i, test := range ssecIsRequestedTests {
+		if got := SSEC.IsRequested(test.Header); got != test.Expected {
+			t.Errorf("Test %d: Wanted %v but got %v", i, test.Expected, got)
+		}
+	}
+}
+
+var ssecCopyIsRequestedTests = []struct {
+	Header   http.Header
+	Expected bool
+}{
+	{Header: http.Header{}, Expected: false},                                                                                                                 // 0
+	{Header: http.Header{"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"}}, Expected: true},                                 // 1
+	{Header: http.Header{"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key": []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="}}, Expected: true}, // 2
+	{Header: http.Header{"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5": []string{"7PpPLAK26ONlVUGOWlusfg=="}}, Expected: true},                 // 3
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{""},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{""},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{""},
+		},
+		Expected: true,
+	}, // 4
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Expected: true,
+	}, // 5
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Expected: false,
+	}, // 6
+}
+
+func TestSSECopyIsRequested(t *testing.T) {
+	for i, test := range ssecCopyIsRequestedTests {
+		if got := SSECopy.IsRequested(test.Header); got != test.Expected {
+			t.Errorf("Test %d: Wanted %v but got %v", i, test.Expected, got)
+		}
+	}
+}
+
+var ssecParseTests = []struct {
+	Header      http.Header
+	ExpectedErr error
+}{
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: nil, // 0
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES-256"}, // invalid algorithm
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: ErrInvalidCustomerAlgorithm, // 1
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{""}, // no client key
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: ErrMissingCustomerKey, // 2
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRr.ZXltdXN0cHJvdmlkZWQ="}, // invalid key
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: ErrInvalidCustomerKey, // 3
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{""}, // no key MD5
+		},
+		ExpectedErr: ErrMissingCustomerKeyMD5, // 4
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"DzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="}, // wrong client key
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: ErrCustomerKeyMD5Mismatch, // 5
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{".7PpPLAK26ONlVUGOWlusfg=="}, // wrong key MD5
+		},
+		ExpectedErr: ErrCustomerKeyMD5Mismatch, // 6
+	},
+}
+
+func TestSSECParse(t *testing.T) {
+	var zeroKey [32]byte
+	for i, test := range ssecParseTests {
+		key, err := SSEC.ParseHTTP(test.Header)
+		if err != test.ExpectedErr {
+			t.Errorf("Test %d: want error '%v' but got '%v'", i, test.ExpectedErr, err)
+		}
+
+		if err != nil && key != zeroKey {
+			t.Errorf("Test %d: parsing failed and client key is not zero key", i)
+		}
+		if err == nil && key == zeroKey {
+			t.Errorf("Test %d: parsed client key is zero key", i)
+		}
+	}
+}
+
+var ssecCopyParseTests = []struct {
+	Header      http.Header
+	ExpectedErr error
+}{
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: nil, // 0
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES-256"}, // invalid algorithm
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: ErrInvalidCustomerAlgorithm, // 1
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{""}, // no client key
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: ErrMissingCustomerKey, // 2
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRr.ZXltdXN0cHJvdmlkZWQ="}, // invalid key
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: ErrInvalidCustomerKey, // 3
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{""}, // no key MD5
+		},
+		ExpectedErr: ErrMissingCustomerKeyMD5, // 4
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"DzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="}, // wrong client key
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedErr: ErrCustomerKeyMD5Mismatch, // 5
+	},
+	{
+		Header: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{".7PpPLAK26ONlVUGOWlusfg=="}, // wrong key MD5
+		},
+		ExpectedErr: ErrCustomerKeyMD5Mismatch, // 6
+	},
+}
+
+func TestSSECopyParse(t *testing.T) {
+	var zeroKey [32]byte
+	for i, test := range ssecCopyParseTests {
+		key, err := SSECopy.ParseHTTP(test.Header)
+		if err != test.ExpectedErr {
+			t.Errorf("Test %d: want error '%v' but got '%v'", i, test.ExpectedErr, err)
+		}
+
+		if err != nil && key != zeroKey {
+			t.Errorf("Test %d: parsing failed and client key is not zero key", i)
+		}
+		if err == nil && key == zeroKey {
+			t.Errorf("Test %d: parsed client key is zero key", i)
+		}
+		if _, ok := test.Header[SSECKey]; ok {
+			t.Errorf("Test %d: client key is not removed from HTTP headers after parsing", i)
+		}
+	}
+}
+
+var removeSensitiveHeadersTests = []struct {
+	Header, ExpectedHeader http.Header
+}{
+	{
+		Header: http.Header{
+			SSECKey:    []string{""},
+			SSECopyKey: []string{""},
+		},
+		ExpectedHeader: http.Header{},
+	},
+	{ // Standard SSE-C request headers
+		Header: http.Header{
+			SSECAlgorithm: []string{SSEAlgorithmAES256},
+			SSECKey:       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			SSECKeyMD5:    []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedHeader: http.Header{
+			SSECAlgorithm: []string{SSEAlgorithmAES256},
+			SSECKeyMD5:    []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+	},
+	{ // Standard SSE-C + SSE-C-copy request headers
+		Header: http.Header{
+			SSECAlgorithm: []string{SSEAlgorithmAES256},
+			SSECKey:       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			SSECKeyMD5:    []string{"7PpPLAK26ONlVUGOWlusfg=="},
+			SSECopyKey:    []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			SSECopyKeyMD5: []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		ExpectedHeader: http.Header{
+			SSECAlgorithm: []string{SSEAlgorithmAES256},
+			SSECKeyMD5:    []string{"7PpPLAK26ONlVUGOWlusfg=="},
+			SSECopyKeyMD5: []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+	},
+	{ // Standard SSE-C + metadata request headers
+		Header: http.Header{
+			SSECAlgorithm:       []string{SSEAlgorithmAES256},
+			SSECKey:             []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			SSECKeyMD5:          []string{"7PpPLAK26ONlVUGOWlusfg=="},
+			"X-Amz-Meta-Test-1": []string{"Test-1"},
+		},
+		ExpectedHeader: http.Header{
+			SSECAlgorithm:       []string{SSEAlgorithmAES256},
+			SSECKeyMD5:          []string{"7PpPLAK26ONlVUGOWlusfg=="},
+			"X-Amz-Meta-Test-1": []string{"Test-1"},
+		},
+	},
+}
+
+func TestRemoveSensitiveHeaders(t *testing.T) {
+	isEqual := func(x, y http.Header) bool {
+		if len(x) != len(y) {
+			return false
+		}
+		for k, v := range x {
+			u, ok := y[k]
+			if !ok || len(v) != len(u) {
+				return false
+			}
+			sort.Strings(v)
+			sort.Strings(u)
+			for j := range v {
+				if v[j] != u[j] {
+					return false
+				}
+			}
+		}
+		return true
+	}
+	areKeysEqual := func(h http.Header, metadata map[string]string) bool {
+		if len(h) != len(metadata) {
+			return false
+		}
+		for k := range h {
+			if _, ok := metadata[k]; !ok {
+				return false
+			}
+		}
+		return true
+	}
+
+	for i, test := range removeSensitiveHeadersTests {
+		metadata := make(map[string]string, len(test.Header))
+		for k := range test.Header {
+			metadata[k] = "" // set metadata key - we don't care about the value
+		}
+
+		RemoveSensitiveHeaders(test.Header)
+		if !isEqual(test.ExpectedHeader, test.Header) {
+			t.Errorf("Test %d: filtered headers do not match expected headers - got: %v , want: %v", i, test.Header, test.ExpectedHeader)
+		}
+		RemoveSensitiveEntries(metadata)
+		if !areKeysEqual(test.ExpectedHeader, metadata) {
+			t.Errorf("Test %d: filtered headers do not match expected headers - got: %v , want: %v", i, test.Header, test.ExpectedHeader)
+		}
+	}
+}

cmd/crypto/key.go

@@ -21,8 +21,9 @@ import (
 	"crypto/rand"
 	"encoding/binary"
 	"errors"
+	"fmt"
 	"io"
-	"path/filepath"
+	"path"
 
 	"github.com/minio/minio/cmd/logger"
 	sha256 "github.com/minio/sha256-simd"
@@ -34,50 +35,98 @@ import (
 type ObjectKey [32]byte
 
 // GenerateKey generates a unique ObjectKey from a 256 bit external key
-// and a source of randomness. If random is nil the default PRNG of system
-// (crypto/rand) is used.
+// and a source of randomness. If random is nil the default PRNG of the
+// system (crypto/rand) is used.
 func GenerateKey(extKey [32]byte, random io.Reader) (key ObjectKey) {
 	if random == nil {
 		random = rand.Reader
 	}
 	var nonce [32]byte
 	if _, err := io.ReadFull(random, nonce[:]); err != nil {
-		logger.CriticalIf(context.Background(), errors.New("Unable to read enough randomness from the system"))
+		logger.CriticalIf(context.Background(), errOutOfEntropy)
 	}
 	sha := sha256.New()
 	sha.Write(extKey[:])
 	sha.Write(nonce[:])
 	sha.Sum(key[:0])
-	return
+	return key
+}
+
+// GenerateIV generates a new random 256 bit IV from the provided source
+// of randomness. If random is nil the default PRNG of the system
+// (crypto/rand) is used.
+func GenerateIV(random io.Reader) (iv [32]byte) {
+	if random == nil {
+		random = rand.Reader
+	}
+	if _, err := io.ReadFull(random, iv[:]); err != nil {
+		logger.CriticalIf(context.Background(), errOutOfEntropy)
+	}
+	return iv
+}
+
+// SealedKey represents a sealed object key. It can be stored
+// at an untrusted location.
+type SealedKey struct {
+	Key       [64]byte // The encrypted and authenticted object-key.
+	IV        [32]byte // The random IV used to encrypt the object-key.
+	Algorithm string   // The sealing algorithm used to encrypt the object key.
 }
 
 // Seal encrypts the ObjectKey using the 256 bit external key and IV. The sealed
-// key is also cryptographically bound to the object's path (bucket/object).
-func (key ObjectKey) Seal(extKey, iv [32]byte, bucket, object string) []byte {
-	var sealedKey bytes.Buffer
+// key is also cryptographically bound to the object's path (bucket/object) and the
+// domain (SSE-C or SSE-S3).
+func (key ObjectKey) Seal(extKey, iv [32]byte, domain, bucket, object string) SealedKey {
+	var (
+		sealingKey   [32]byte
+		encryptedKey bytes.Buffer
+	)
 	mac := hmac.New(sha256.New, extKey[:])
 	mac.Write(iv[:])
-	mac.Write([]byte(filepath.Join(bucket, object)))
-
-	if n, err := sio.Encrypt(&sealedKey, bytes.NewReader(key[:]), sio.Config{Key: mac.Sum(nil)}); n != 64 || err != nil {
+	mac.Write([]byte(domain))
+	mac.Write([]byte(SealAlgorithm))
+	mac.Write([]byte(path.Join(bucket, object))) // use path.Join for canonical 'bucket/object'
+	mac.Sum(sealingKey[:0])
+	if n, err := sio.Encrypt(&encryptedKey, bytes.NewReader(key[:]), sio.Config{Key: sealingKey[:]}); n != 64 || err != nil {
 		logger.CriticalIf(context.Background(), errors.New("Unable to generate sealed key"))
 	}
-	return sealedKey.Bytes()
+	sealedKey := SealedKey{
+		IV:        iv,
+		Algorithm: SealAlgorithm,
+	}
+	copy(sealedKey.Key[:], encryptedKey.Bytes())
+	return sealedKey
 }
 
-// Unseal decrypts a sealed key using the 256 bit external key and IV. Since the sealed key
-// is cryptographically bound to the object's path the same bucket/object as during sealing
+// Unseal decrypts a sealed key using the 256 bit external key. Since the sealed key
+// may be cryptographically bound to the object's path the same bucket/object as during sealing
 // must be provided. On success the ObjectKey contains the decrypted sealed key.
-func (key *ObjectKey) Unseal(sealedKey []byte, extKey, iv [32]byte, bucket, object string) error {
-	var unsealedKey bytes.Buffer
-	mac := hmac.New(sha256.New, extKey[:])
-	mac.Write(iv[:])
-	mac.Write([]byte(filepath.Join(bucket, object)))
-
-	if n, err := sio.Decrypt(&unsealedKey, bytes.NewReader(sealedKey), sio.Config{Key: mac.Sum(nil)}); n != 32 || err != nil {
-		return err // TODO(aead): upgrade sio to use sio.Error
+func (key *ObjectKey) Unseal(extKey [32]byte, sealedKey SealedKey, domain, bucket, object string) error {
+	var (
+		unsealConfig sio.Config
+		decryptedKey bytes.Buffer
+	)
+	switch sealedKey.Algorithm {
+	default:
+		return Error{fmt.Sprintf("The sealing algorithm '%s' is not supported", sealedKey.Algorithm)}
+	case SealAlgorithm:
+		mac := hmac.New(sha256.New, extKey[:])
+		mac.Write(sealedKey.IV[:])
+		mac.Write([]byte(domain))
+		mac.Write([]byte(SealAlgorithm))
+		mac.Write([]byte(path.Join(bucket, object))) // use path.Join for canonical 'bucket/object'
+		unsealConfig = sio.Config{MinVersion: sio.Version20, Key: mac.Sum(nil)}
+	case InsecureSealAlgorithm:
+		sha := sha256.New()
+		sha.Write(extKey[:])
+		sha.Write(sealedKey.IV[:])
+		unsealConfig = sio.Config{MinVersion: sio.Version10, Key: sha.Sum(nil)}
 	}
-	copy(key[:], unsealedKey.Bytes())
+
+	if n, err := sio.Decrypt(&decryptedKey, bytes.NewReader(sealedKey.Key[:]), unsealConfig); n != 32 || err != nil {
+		return ErrSecretKeyMismatch
+	}
+	copy(key[:], decryptedKey.Bytes())
 	return nil
 }
 
@@ -89,5 +138,39 @@ func (key ObjectKey) DerivePartKey(id uint32) (partKey [32]byte) {
 	mac := hmac.New(sha256.New, key[:])
 	mac.Write(bin[:])
 	mac.Sum(partKey[:0])
-	return
+	return partKey
+}
+
+// SealETag seals the etag using the object key.
+// It does not encrypt empty ETags because such ETags indicate
+// that the S3 client hasn't sent an ETag = MD5(object) and
+// the backend can pick an ETag value.
+func (key ObjectKey) SealETag(etag []byte) []byte {
+	if len(etag) == 0 { // don't encrypt empty ETag - only if client sent ETag = MD5(object)
+		return etag
+	}
+	var buffer bytes.Buffer
+	mac := hmac.New(sha256.New, key[:])
+	mac.Write([]byte("SSE-etag"))
+	if _, err := sio.Encrypt(&buffer, bytes.NewReader(etag), sio.Config{Key: mac.Sum(nil)}); err != nil {
+		logger.CriticalIf(context.Background(), errors.New("Unable to encrypt ETag using object key"))
+	}
+	return buffer.Bytes()
+}
+
+// UnsealETag unseals the etag using the provided object key.
+// It does not try to decrypt the ETag if len(etag) == 16
+// because such ETags indicate that the S3 client hasn't sent
+// an ETag = MD5(object) and the backend has picked an ETag value.
+func (key ObjectKey) UnsealETag(etag []byte) ([]byte, error) {
+	if !IsETagSealed(etag) {
+		return etag, nil
+	}
+	var buffer bytes.Buffer
+	mac := hmac.New(sha256.New, key[:])
+	mac.Write([]byte("SSE-etag"))
+	if _, err := sio.Decrypt(&buffer, bytes.NewReader(etag), sio.Config{Key: mac.Sum(nil)}); err != nil {
+		return nil, err
+	}
+	return buffer.Bytes(), nil
 }

cmd/crypto/key_test.go

@@ -20,6 +20,8 @@ import (
 	"encoding/hex"
 	"io"
 	"testing"
+
+	"github.com/minio/minio/cmd/logger"
 )
 
 var shortRandom = func(limit int64) io.Reader { return io.LimitReader(rand.Reader, limit) }
@@ -37,14 +39,18 @@ var generateKeyTests = []struct {
 	Random     io.Reader
 	ShouldPass bool
 }{
-	{ExtKey: [32]byte{}, Random: nil, ShouldPass: true},             // 0
-	{ExtKey: [32]byte{}, Random: rand.Reader, ShouldPass: true},     // 1
-	{ExtKey: [32]byte{}, Random: shortRandom(32), ShouldPass: true}, // 2
-	// {ExtKey: [32]byte{}, Random: shortRandom(31), ShouldPass: false}, // 3 See: https://github.com/minio/minio/issues/6064
+	{ExtKey: [32]byte{}, Random: nil, ShouldPass: true},              // 0
+	{ExtKey: [32]byte{}, Random: rand.Reader, ShouldPass: true},      // 1
+	{ExtKey: [32]byte{}, Random: shortRandom(32), ShouldPass: true},  // 2
+	{ExtKey: [32]byte{}, Random: shortRandom(31), ShouldPass: false}, // 3
 }
 
 func TestGenerateKey(t *testing.T) {
+	defer func(disableLog bool) { logger.Disable = disableLog }(logger.Disable)
+	logger.Disable = true
+
 	for i, test := range generateKeyTests {
+		i, test := i, test
 		func() {
 			defer recoverTest(i, test.ShouldPass, t)
 			key := GenerateKey(test.ExtKey, test.Random)
@@ -55,38 +61,64 @@ func TestGenerateKey(t *testing.T) {
 	}
 }
 
-var sealUnsealKeyTests = []struct {
-	SealExtKey, SealIV     [32]byte
-	SealBucket, SealObject string
+var generateIVTests = []struct {
+	Random     io.Reader
+	ShouldPass bool
+}{
+	{Random: nil, ShouldPass: true},              // 0
+	{Random: rand.Reader, ShouldPass: true},      // 1
+	{Random: shortRandom(32), ShouldPass: true},  // 2
+	{Random: shortRandom(31), ShouldPass: false}, // 3
+}
 
-	UnsealExtKey, UnsealIV     [32]byte
-	UnsealBucket, UnsealObject string
+func TestGenerateIV(t *testing.T) {
+	defer func(disableLog bool) { logger.Disable = disableLog }(logger.Disable)
+	logger.Disable = true
+
+	for i, test := range generateIVTests {
+		i, test := i, test
+		func() {
+			defer recoverTest(i, test.ShouldPass, t)
+			iv := GenerateIV(test.Random)
+			if iv == [32]byte{} {
+				t.Errorf("Test %d: generated IV is zero IV", i) // check that we generate random and unique IV
+			}
+		}()
+	}
+}
+
+var sealUnsealKeyTests = []struct {
+	SealExtKey, SealIV                 [32]byte
+	SealDomain, SealBucket, SealObject string
+
+	UnsealExtKey                             [32]byte
+	UnsealDomain, UnsealBucket, UnsealObject string
 
 	ShouldPass bool
 }{
 	{
-		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealBucket: "bucket", SealObject: "object",
-		UnsealExtKey: [32]byte{}, UnsealIV: [32]byte{}, UnsealBucket: "bucket", UnsealObject: "object",
+		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealDomain: "SSE-C", SealBucket: "bucket", SealObject: "object",
+		UnsealExtKey: [32]byte{}, UnsealDomain: "SSE-C", UnsealBucket: "bucket", UnsealObject: "object",
 		ShouldPass: true,
 	}, // 0
 	{
-		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealBucket: "bucket", SealObject: "object",
-		UnsealExtKey: [32]byte{1}, UnsealIV: [32]byte{0}, UnsealBucket: "bucket", UnsealObject: "object",
+		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealDomain: "SSE-C", SealBucket: "bucket", SealObject: "object",
+		UnsealExtKey: [32]byte{1}, UnsealDomain: "SSE-C", UnsealBucket: "bucket", UnsealObject: "object", // different ext-key
 		ShouldPass: false,
 	}, // 1
 	{
-		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealBucket: "bucket", SealObject: "object",
-		UnsealExtKey: [32]byte{}, UnsealIV: [32]byte{1}, UnsealBucket: "bucket", UnsealObject: "object",
+		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealDomain: "SSE-S3", SealBucket: "bucket", SealObject: "object",
+		UnsealExtKey: [32]byte{}, UnsealDomain: "SSE-C", UnsealBucket: "bucket", UnsealObject: "object", // different domain
 		ShouldPass: false,
 	}, // 2
 	{
-		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealBucket: "bucket", SealObject: "object",
-		UnsealExtKey: [32]byte{}, UnsealIV: [32]byte{}, UnsealBucket: "Bucket", UnsealObject: "object",
+		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealDomain: "SSE-C", SealBucket: "bucket", SealObject: "object",
+		UnsealExtKey: [32]byte{}, UnsealDomain: "SSE-C", UnsealBucket: "Bucket", UnsealObject: "object", // different bucket
 		ShouldPass: false,
 	}, // 3
 	{
-		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealBucket: "bucket", SealObject: "object",
-		UnsealExtKey: [32]byte{}, UnsealIV: [32]byte{}, UnsealBucket: "bucket", UnsealObject: "Object",
+		SealExtKey: [32]byte{}, SealIV: [32]byte{}, SealDomain: "SSE-C", SealBucket: "bucket", SealObject: "object",
+		UnsealExtKey: [32]byte{}, UnsealDomain: "SSE-C", UnsealBucket: "bucket", UnsealObject: "Object", // different object
 		ShouldPass: false,
 	}, // 4
 }
@@ -94,13 +126,22 @@ var sealUnsealKeyTests = []struct {
 func TestSealUnsealKey(t *testing.T) {
 	for i, test := range sealUnsealKeyTests {
 		key := GenerateKey(test.SealExtKey, rand.Reader)
-		sealedKey := key.Seal(test.SealExtKey, test.SealIV, test.SealBucket, test.SealObject)
-		if err := key.Unseal(sealedKey, test.UnsealExtKey, test.UnsealIV, test.UnsealBucket, test.UnsealObject); err == nil && !test.ShouldPass {
+		sealedKey := key.Seal(test.SealExtKey, test.SealIV, test.SealDomain, test.SealBucket, test.SealObject)
+		if err := key.Unseal(test.UnsealExtKey, sealedKey, test.UnsealDomain, test.UnsealBucket, test.UnsealObject); err == nil && !test.ShouldPass {
 			t.Errorf("Test %d should fail but passed successfully", i)
 		} else if err != nil && test.ShouldPass {
 			t.Errorf("Test %d should pass put failed: %v", i, err)
 		}
 	}
+
+	// Test legacy InsecureSealAlgorithm
+	var extKey, iv [32]byte
+	key := GenerateKey(extKey, rand.Reader)
+	sealedKey := key.Seal(extKey, iv, "SSE-S3", "bucket", "object")
+	sealedKey.Algorithm = InsecureSealAlgorithm
+	if err := key.Unseal(extKey, sealedKey, "SSE-S3", "bucket", "object"); err == nil {
+		t.Errorf("'%s' test succeeded but it should fail because the legacy algorithm was used", sealedKey.Algorithm)
+	}
 }
 
 var derivePartKeyTest = []struct {
@@ -125,3 +166,31 @@ func TestDerivePartKey(t *testing.T) {
 		}
 	}
 }
+
+var sealUnsealETagTests = []string{
+	"",
+	"90682b8e8cc7609c",
+	"90682b8e8cc7609c4671e1d64c73fc30",
+	"90682b8e8cc7609c4671e1d64c73fc307fb3104f",
+}
+
+func TestSealETag(t *testing.T) {
+	var key ObjectKey
+	for i := range key {
+		key[i] = byte(i)
+	}
+	for i, etag := range sealUnsealETagTests {
+		tag, err := hex.DecodeString(etag)
+		if err != nil {
+			t.Errorf("Test %d: failed to decode etag: %s", i, err)
+		}
+		sealedETag := key.SealETag(tag)
+		unsealedETag, err := key.UnsealETag(sealedETag)
+		if err != nil {
+			t.Errorf("Test %d: failed to decrypt etag: %s", i, err)
+		}
+		if !bytes.Equal(unsealedETag, tag) {
+			t.Errorf("Test %d: unsealed etag does not match: got %s - want %s", i, hex.EncodeToString(unsealedETag), etag)
+		}
+	}
+}

cmd/crypto/kms.go

@@ -0,0 +1,138 @@
+// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crypto
+
+import (
+	"bytes"
+	"context"
+	"crypto/hmac"
+	"crypto/rand"
+	"errors"
+	"fmt"
+	"io"
+	"sort"
+
+	"github.com/minio/minio/cmd/logger"
+	sha256 "github.com/minio/sha256-simd"
+	"github.com/minio/sio"
+)
+
+// Context is a list of key-value pairs cryptographically
+// associated with a certain object.
+type Context map[string]string
+
+// WriteTo writes the context in a canonical from to w.
+// It returns the number of bytes and the first error
+// encounter during writing to w, if any.
+//
+// WriteTo sorts the context keys and writes the sorted
+// key-value pairs as canonical JSON object to w.
+func (c Context) WriteTo(w io.Writer) (n int64, err error) {
+	sortedKeys := make(sort.StringSlice, 0, len(c))
+	for k := range c {
+		sortedKeys = append(sortedKeys, k)
+	}
+	sort.Sort(sortedKeys)
+
+	nn, err := io.WriteString(w, "{")
+	if err != nil {
+		return n + int64(nn), err
+	}
+	n += int64(nn)
+	for i, k := range sortedKeys {
+		s := fmt.Sprintf("\"%s\":\"%s\",", k, c[k])
+		if i == len(sortedKeys)-1 {
+			s = s[:len(s)-1] // remove last ','
+		}
+
+		nn, err = io.WriteString(w, s)
+		if err != nil {
+			return n + int64(nn), err
+		}
+		n += int64(nn)
+	}
+	nn, err = io.WriteString(w, "}")
+	return n + int64(nn), err
+}
+
+// KMS represents an active and authenticted connection
+// to a Key-Management-Service. It supports generating
+// data key generation and unsealing of KMS-generated
+// data keys.
+type KMS interface {
+	// GenerateKey generates a new random data key using
+	// the master key referenced by the keyID. It returns
+	// the plaintext key and the sealed plaintext key
+	// on success.
+	//
+	// The context is cryptographically bound to the
+	// generated key. The same context must be provided
+	// again to unseal the generated key.
+	GenerateKey(keyID string, context Context) (key [32]byte, sealedKey []byte, err error)
+
+	// UnsealKey unseals the sealedKey using the master key
+	// referenced by the keyID. The provided context must
+	// match the context used to generate the sealed key.
+	UnsealKey(keyID string, sealedKey []byte, context Context) (key [32]byte, err error)
+}
+
+type masterKeyKMS struct {
+	masterKey [32]byte
+}
+
+// NewKMS returns a basic KMS implementation from a single 256 bit master key.
+//
+// The KMS accepts any keyID but binds the keyID and context cryptographically
+// to the generated keys.
+func NewKMS(key [32]byte) KMS { return &masterKeyKMS{masterKey: key} }
+
+func (kms *masterKeyKMS) GenerateKey(keyID string, ctx Context) (key [32]byte, sealedKey []byte, err error) {
+	if _, err = io.ReadFull(rand.Reader, key[:]); err != nil {
+		logger.CriticalIf(context.Background(), errOutOfEntropy)
+	}
+
+	var (
+		buffer     bytes.Buffer
+		derivedKey = kms.deriveKey(keyID, ctx)
+	)
+	if n, err := sio.Encrypt(&buffer, bytes.NewReader(key[:]), sio.Config{Key: derivedKey[:]}); err != nil || n != 64 {
+		logger.CriticalIf(context.Background(), errors.New("KMS: unable to encrypt data key"))
+	}
+	sealedKey = buffer.Bytes()
+	return key, sealedKey, nil
+}
+
+func (kms *masterKeyKMS) UnsealKey(keyID string, sealedKey []byte, ctx Context) (key [32]byte, err error) {
+	var (
+		buffer     bytes.Buffer
+		derivedKey = kms.deriveKey(keyID, ctx)
+	)
+	if n, err := sio.Decrypt(&buffer, bytes.NewReader(sealedKey), sio.Config{Key: derivedKey[:]}); err != nil || n != 32 {
+		return key, err // TODO(aead): upgrade sio to use sio.Error
+	}
+	copy(key[:], buffer.Bytes())
+	return key, nil
+}
+
+func (kms *masterKeyKMS) deriveKey(keyID string, context Context) (key [32]byte) {
+	if context == nil {
+		context = Context{}
+	}
+	mac := hmac.New(sha256.New, kms.masterKey[:])
+	mac.Write([]byte(keyID))
+	context.WriteTo(mac)
+	mac.Sum(key[:0])
+	return key
+}

cmd/crypto/kms_test.go

@@ -0,0 +1,84 @@
+// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crypto
+
+import (
+	"bytes"
+	"path"
+	"strings"
+	"testing"
+)
+
+var masterKeyKMSTests = []struct {
+	GenKeyID, UnsealKeyID     string
+	GenContext, UnsealContext Context
+
+	ShouldFail bool
+}{
+	{GenKeyID: "", UnsealKeyID: "", GenContext: Context{}, UnsealContext: nil, ShouldFail: false},                                                                                     // 0
+	{GenKeyID: "ac47be7f", UnsealKeyID: "ac47be7f", GenContext: Context{}, UnsealContext: Context{}, ShouldFail: false},                                                               // 1
+	{GenKeyID: "ac47be7f", UnsealKeyID: "ac47be7f", GenContext: Context{"bucket": "object"}, UnsealContext: Context{"bucket": "object"}, ShouldFail: false},                           // 2
+	{GenKeyID: "", UnsealKeyID: "", GenContext: Context{"bucket": path.Join("bucket", "object")}, UnsealContext: Context{"bucket": path.Join("bucket", "object")}, ShouldFail: false}, // 3
+	{GenKeyID: "", UnsealKeyID: "", GenContext: Context{"a": "a", "0": "0", "b": "b"}, UnsealContext: Context{"b": "b", "a": "a", "0": "0"}, ShouldFail: false},                       // 4
+
+	{GenKeyID: "ac47be7f", UnsealKeyID: "ac47be7e", GenContext: Context{}, UnsealContext: Context{}, ShouldFail: true},                                                               // 5
+	{GenKeyID: "ac47be7f", UnsealKeyID: "ac47be7f", GenContext: Context{"bucket": "object"}, UnsealContext: Context{"Bucket": "object"}, ShouldFail: true},                           // 6
+	{GenKeyID: "", UnsealKeyID: "", GenContext: Context{"bucket": path.Join("bucket", "Object")}, UnsealContext: Context{"bucket": path.Join("bucket", "object")}, ShouldFail: true}, // 7
+	{GenKeyID: "", UnsealKeyID: "", GenContext: Context{"a": "a", "0": "1", "b": "b"}, UnsealContext: Context{"b": "b", "a": "a", "0": "0"}, ShouldFail: true},                       // 8
+}
+
+func TestMasterKeyKMS(t *testing.T) {
+	kms := NewKMS([32]byte{})
+	for i, test := range masterKeyKMSTests {
+		key, sealedKey, err := kms.GenerateKey(test.GenKeyID, test.GenContext)
+		if err != nil {
+			t.Errorf("Test %d: KMS failed to generate key: %v", i, err)
+		}
+		unsealedKey, err := kms.UnsealKey(test.UnsealKeyID, sealedKey, test.UnsealContext)
+		if err != nil && !test.ShouldFail {
+			t.Errorf("Test %d: KMS failed to unseal the generated key: %v", i, err)
+		}
+		if err == nil && test.ShouldFail {
+			t.Errorf("Test %d: KMS unsealed the generated successfully but should have failed", i)
+		}
+		if !test.ShouldFail && !bytes.Equal(key[:], unsealedKey[:]) {
+			t.Errorf("Test %d: The generated and unsealed key differ", i)
+		}
+	}
+}
+
+var contextWriteToTests = []struct {
+	Context      Context
+	ExpectedJSON string
+}{
+	{Context: Context{}, ExpectedJSON: "{}"},                                                    // 0
+	{Context: Context{"a": "b"}, ExpectedJSON: `{"a":"b"}`},                                     // 1
+	{Context: Context{"a": "b", "c": "d"}, ExpectedJSON: `{"a":"b","c":"d"}`},                   // 2
+	{Context: Context{"c": "d", "a": "b"}, ExpectedJSON: `{"a":"b","c":"d"}`},                   // 3
+	{Context: Context{"0": "1", "-": "2", ".": "#"}, ExpectedJSON: `{"-":"2",".":"#","0":"1"}`}, // 4
+}
+
+func TestContextWriteTo(t *testing.T) {
+	for i, test := range contextWriteToTests {
+		var jsonContext strings.Builder
+		if _, err := test.Context.WriteTo(&jsonContext); err != nil {
+			t.Errorf("Test %d: Failed to encode context: %v", i, err)
+			continue
+		}
+		if s := jsonContext.String(); s != test.ExpectedJSON {
+			t.Errorf("Test %d: JSON representation differ - got: '%s' want: '%s'", i, s, test.ExpectedJSON)
+		}
+	}
+}

cmd/crypto/metadata.go

@@ -0,0 +1,236 @@
+// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crypto
+
+import (
+	"context"
+	"encoding/base64"
+	"fmt"
+
+	"github.com/minio/minio/cmd/logger"
+)
+
+// IsMultiPart returns true if the object metadata indicates
+// that it was uploaded using some form of server-side-encryption
+// and the S3 multipart API.
+func IsMultiPart(metadata map[string]string) bool {
+	if _, ok := metadata[SSEMultipart]; ok {
+		return true
+	}
+	return false
+}
+
+// RemoveSensitiveEntries removes confidential encryption
+// information - e.g. the SSE-C key - from the metadata map.
+// It has the same semantics as RemoveSensitiveHeaders.
+func RemoveSensitiveEntries(metadata map[string]string) { // The functions is tested in TestRemoveSensitiveHeaders for compatibility reasons
+	delete(metadata, SSECKey)
+	delete(metadata, SSECopyKey)
+}
+
+// RemoveInternalEntries removes all crypto-specific internal
+// metadata entries from the metadata map.
+func RemoveInternalEntries(metadata map[string]string) {
+	delete(metadata, SSEMultipart)
+	delete(metadata, SSEIV)
+	delete(metadata, SSESealAlgorithm)
+	delete(metadata, SSECSealedKey)
+	delete(metadata, S3SealedKey)
+	delete(metadata, S3KMSKeyID)
+	delete(metadata, S3KMSSealedKey)
+}
+
+// IsEncrypted returns true if the object metadata indicates
+// that it was uploaded using some form of server-side-encryption.
+//
+// IsEncrypted only checks whether the metadata contains at least
+// one entry indicating SSE-C or SSE-S3.
+func IsEncrypted(metadata map[string]string) bool {
+	if _, ok := metadata[SSEIV]; ok {
+		return true
+	}
+	if _, ok := metadata[SSESealAlgorithm]; ok {
+		return true
+	}
+	if IsMultiPart(metadata) {
+		return true
+	}
+	if S3.IsEncrypted(metadata) {
+		return true
+	}
+	if SSEC.IsEncrypted(metadata) {
+		return true
+	}
+	return false
+}
+
+// IsEncrypted returns true if the object metadata indicates
+// that the object was uploaded using SSE-S3.
+func (s3) IsEncrypted(metadata map[string]string) bool {
+	if _, ok := metadata[S3SealedKey]; ok {
+		return true
+	}
+	if _, ok := metadata[S3KMSKeyID]; ok {
+		return true
+	}
+	if _, ok := metadata[S3KMSSealedKey]; ok {
+		return true
+	}
+	return false
+}
+
+// IsEncrypted returns true if the object metadata indicates
+// that the object was uploaded using SSE-C.
+func (ssec) IsEncrypted(metadata map[string]string) bool {
+	if _, ok := metadata[SSECSealedKey]; ok {
+		return true
+	}
+	return false
+}
+
+// CreateMultipartMetadata adds the multipart flag entry to metadata
+// and returns modifed metadata. It allocates a new metadata map if
+// metadata is nil.
+func CreateMultipartMetadata(metadata map[string]string) map[string]string {
+	if metadata == nil {
+		metadata = map[string]string{}
+	}
+	metadata[SSEMultipart] = ""
+	return metadata
+}
+
+// CreateMetadata encodes the keyID, the sealed kms data key and the sealed key
+// into the metadata and returns the modified metadata. It allocates a new
+// metadata map if metadata is nil.
+func (s3) CreateMetadata(metadata map[string]string, keyID string, kmsKey []byte, sealedKey SealedKey) map[string]string {
+	if sealedKey.Algorithm != SealAlgorithm {
+		logger.CriticalIf(context.Background(), fmt.Errorf("The seal algorithm '%s' is invalid for SSE-S3", sealedKey.Algorithm))
+	}
+
+	if metadata == nil {
+		metadata = map[string]string{}
+	}
+	metadata[S3KMSKeyID] = keyID
+	metadata[SSESealAlgorithm] = sealedKey.Algorithm
+	metadata[SSEIV] = base64.StdEncoding.EncodeToString(sealedKey.IV[:])
+	metadata[S3SealedKey] = base64.StdEncoding.EncodeToString(sealedKey.Key[:])
+	metadata[S3KMSSealedKey] = base64.StdEncoding.EncodeToString(kmsKey)
+	return metadata
+}
+
+// ParseMetadata extracts all SSE-S3 related values from the object metadata
+// and checks whether they are well-formed. It returns the KMS key-ID, the
+// sealed KMS key and the sealed object key on success.
+func (s3) ParseMetadata(metadata map[string]string) (keyID string, kmsKey []byte, sealedKey SealedKey, err error) {
+	// Extract all required values from object metadata
+	b64IV, ok := metadata[SSEIV]
+	if !ok {
+		return keyID, kmsKey, sealedKey, errMissingInternalIV
+	}
+	algorithm, ok := metadata[SSESealAlgorithm]
+	if !ok {
+		return keyID, kmsKey, sealedKey, errMissingInternalSealAlgorithm
+	}
+	b64SealedKey, ok := metadata[S3SealedKey]
+	if !ok {
+		return keyID, kmsKey, sealedKey, Error{"The object metadata is missing the internal sealed key for SSE-S3"}
+	}
+	keyID, ok = metadata[S3KMSKeyID]
+	if !ok {
+		return keyID, kmsKey, sealedKey, Error{"The object metadata is missing the internal KMS key-ID for SSE-S3"}
+	}
+	b64KMSSealedKey, ok := metadata[S3KMSSealedKey]
+	if !ok {
+		return keyID, kmsKey, sealedKey, Error{"The object metadata is missing the internal sealed KMS data key for SSE-S3"}
+	}
+
+	// Check whether all extracted values are well-formed
+	iv, err := base64.StdEncoding.DecodeString(b64IV)
+	if err != nil || len(iv) != 32 {
+		return keyID, kmsKey, sealedKey, errInvalidInternalIV
+	}
+	if algorithm != SealAlgorithm {
+		return keyID, kmsKey, sealedKey, errInvalidInternalSealAlgorithm
+	}
+	encryptedKey, err := base64.StdEncoding.DecodeString(b64SealedKey)
+	if err != nil || len(encryptedKey) != 64 {
+		return keyID, kmsKey, sealedKey, Error{"The internal sealed key for SSE-S3 is invalid"}
+	}
+	kmsKey, err = base64.StdEncoding.DecodeString(b64KMSSealedKey)
+	if err != nil {
+		return keyID, kmsKey, sealedKey, Error{"The internal sealed KMS data key for SSE-S3 is invalid"}
+	}
+
+	sealedKey.Algorithm = algorithm
+	copy(sealedKey.IV[:], iv)
+	copy(sealedKey.Key[:], encryptedKey)
+	return keyID, kmsKey, sealedKey, nil
+}
+
+// CreateMetadata encodes the sealed key into the metadata and returns the modified metadata.
+// It allocates a new metadata map if metadata is nil.
+func (ssec) CreateMetadata(metadata map[string]string, sealedKey SealedKey) map[string]string {
+	if sealedKey.Algorithm != SealAlgorithm {
+		logger.CriticalIf(context.Background(), fmt.Errorf("The seal algorithm '%s' is invalid for SSE-C", sealedKey.Algorithm))
+	}
+
+	if metadata == nil {
+		metadata = map[string]string{}
+	}
+	metadata[SSESealAlgorithm] = SealAlgorithm
+	metadata[SSEIV] = base64.StdEncoding.EncodeToString(sealedKey.IV[:])
+	metadata[SSECSealedKey] = base64.StdEncoding.EncodeToString(sealedKey.Key[:])
+	return metadata
+}
+
+// ParseMetadata extracts all SSE-C related values from the object metadata
+// and checks whether they are well-formed. It returns the sealed object key
+// on success.
+func (ssec) ParseMetadata(metadata map[string]string) (sealedKey SealedKey, err error) {
+	// Extract all required values from object metadata
+	b64IV, ok := metadata[SSEIV]
+	if !ok {
+		return sealedKey, errMissingInternalIV
+	}
+	algorithm, ok := metadata[SSESealAlgorithm]
+	if !ok {
+		return sealedKey, errMissingInternalSealAlgorithm
+	}
+	b64SealedKey, ok := metadata[SSECSealedKey]
+	if !ok {
+		return sealedKey, Error{"The object metadata is missing the internal sealed key for SSE-C"}
+	}
+
+	// Check whether all extracted values are well-formed
+	iv, err := base64.StdEncoding.DecodeString(b64IV)
+	if err != nil || len(iv) != 32 {
+		return sealedKey, errInvalidInternalIV
+	}
+	if algorithm != SealAlgorithm && algorithm != InsecureSealAlgorithm {
+		return sealedKey, errInvalidInternalSealAlgorithm
+	}
+	encryptedKey, err := base64.StdEncoding.DecodeString(b64SealedKey)
+	if err != nil || len(encryptedKey) != 64 {
+		return sealedKey, Error{"The internal sealed key for SSE-C is invalid"}
+	}
+
+	sealedKey.Algorithm = algorithm
+	copy(sealedKey.IV[:], iv)
+	copy(sealedKey.Key[:], encryptedKey)
+	return sealedKey, nil
+}
+
+// IsETagSealed returns true if the etag seems to be encrypted.
+func IsETagSealed(etag []byte) bool { return len(etag) > 16 }

cmd/crypto/metadata_test.go

@@ -0,0 +1,439 @@
+// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crypto
+
+import (
+	"bytes"
+	"encoding/base64"
+	"encoding/hex"
+	"testing"
+
+	"github.com/minio/minio/cmd/logger"
+)
+
+var isMultipartTests = []struct {
+	Metadata  map[string]string
+	Multipart bool
+}{
+	{Multipart: true, Metadata: map[string]string{SSEMultipart: ""}},                           // 0
+	{Multipart: true, Metadata: map[string]string{"X-Minio-Internal-Encrypted-Multipart": ""}}, // 1
+	{Multipart: true, Metadata: map[string]string{SSEMultipart: "some-value"}},                 // 2
+	{Multipart: false, Metadata: map[string]string{"": ""}},                                    // 3
+	{Multipart: false, Metadata: map[string]string{"X-Minio-Internal-EncryptedMultipart": ""}}, // 4
+}
+
+func TestIsMultipart(t *testing.T) {
+	for i, test := range isMultipartTests {
+		if isMultipart := IsMultiPart(test.Metadata); isMultipart != test.Multipart {
+			t.Errorf("Test %d: got '%v' - want '%v'", i, isMultipart, test.Multipart)
+		}
+	}
+}
+
+var isEncryptedTests = []struct {
+	Metadata  map[string]string
+	Encrypted bool
+}{
+	{Encrypted: true, Metadata: map[string]string{SSEMultipart: ""}},                               // 0
+	{Encrypted: true, Metadata: map[string]string{SSEIV: ""}},                                      // 1
+	{Encrypted: true, Metadata: map[string]string{SSESealAlgorithm: ""}},                           // 2
+	{Encrypted: true, Metadata: map[string]string{SSECSealedKey: ""}},                              // 3
+	{Encrypted: true, Metadata: map[string]string{S3SealedKey: ""}},                                // 4
+	{Encrypted: true, Metadata: map[string]string{S3KMSKeyID: ""}},                                 // 5
+	{Encrypted: true, Metadata: map[string]string{S3KMSSealedKey: ""}},                             // 6
+	{Encrypted: false, Metadata: map[string]string{"": ""}},                                        // 7
+	{Encrypted: false, Metadata: map[string]string{"X-Minio-Internal-Server-Side-Encryption": ""}}, // 8
+}
+
+func TestIsEncrypted(t *testing.T) {
+	for i, test := range isEncryptedTests {
+		if isEncrypted := IsEncrypted(test.Metadata); isEncrypted != test.Encrypted {
+			t.Errorf("Test %d: got '%v' - want '%v'", i, isEncrypted, test.Encrypted)
+		}
+	}
+}
+
+var s3IsEncryptedTests = []struct {
+	Metadata  map[string]string
+	Encrypted bool
+}{
+	{Encrypted: false, Metadata: map[string]string{SSEMultipart: ""}},                              // 0
+	{Encrypted: false, Metadata: map[string]string{SSEIV: ""}},                                     // 1
+	{Encrypted: false, Metadata: map[string]string{SSESealAlgorithm: ""}},                          // 2
+	{Encrypted: false, Metadata: map[string]string{SSECSealedKey: ""}},                             // 3
+	{Encrypted: true, Metadata: map[string]string{S3SealedKey: ""}},                                // 4
+	{Encrypted: true, Metadata: map[string]string{S3KMSKeyID: ""}},                                 // 5
+	{Encrypted: true, Metadata: map[string]string{S3KMSSealedKey: ""}},                             // 6
+	{Encrypted: false, Metadata: map[string]string{"": ""}},                                        // 7
+	{Encrypted: false, Metadata: map[string]string{"X-Minio-Internal-Server-Side-Encryption": ""}}, // 8
+}
+
+func TestS3IsEncrypted(t *testing.T) {
+	for i, test := range s3IsEncryptedTests {
+		if isEncrypted := S3.IsEncrypted(test.Metadata); isEncrypted != test.Encrypted {
+			t.Errorf("Test %d: got '%v' - want '%v'", i, isEncrypted, test.Encrypted)
+		}
+	}
+}
+
+var ssecIsEncryptedTests = []struct {
+	Metadata  map[string]string
+	Encrypted bool
+}{
+	{Encrypted: false, Metadata: map[string]string{SSEMultipart: ""}},                              // 0
+	{Encrypted: false, Metadata: map[string]string{SSEIV: ""}},                                     // 1
+	{Encrypted: false, Metadata: map[string]string{SSESealAlgorithm: ""}},                          // 2
+	{Encrypted: true, Metadata: map[string]string{SSECSealedKey: ""}},                              // 3
+	{Encrypted: false, Metadata: map[string]string{S3SealedKey: ""}},                               // 4
+	{Encrypted: false, Metadata: map[string]string{S3KMSKeyID: ""}},                                // 5
+	{Encrypted: false, Metadata: map[string]string{S3KMSSealedKey: ""}},                            // 6
+	{Encrypted: false, Metadata: map[string]string{"": ""}},                                        // 7
+	{Encrypted: false, Metadata: map[string]string{"X-Minio-Internal-Server-Side-Encryption": ""}}, // 8
+}
+
+func TestSSECIsEncrypted(t *testing.T) {
+	for i, test := range ssecIsEncryptedTests {
+		if isEncrypted := SSEC.IsEncrypted(test.Metadata); isEncrypted != test.Encrypted {
+			t.Errorf("Test %d: got '%v' - want '%v'", i, isEncrypted, test.Encrypted)
+		}
+	}
+}
+
+var s3ParseMetadataTests = []struct {
+	Metadata    map[string]string
+	ExpectedErr error
+
+	DataKey   []byte
+	KeyID     string
+	SealedKey SealedKey
+}{
+	{ExpectedErr: errMissingInternalIV, Metadata: map[string]string{}, DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{}}, // 0
+	{
+		ExpectedErr: errMissingInternalSealAlgorithm, Metadata: map[string]string{SSEIV: ""},
+		DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
+	}, // 1
+	{
+		ExpectedErr: Error{"The object metadata is missing the internal sealed key for SSE-S3"},
+		Metadata:    map[string]string{SSEIV: "", SSESealAlgorithm: ""}, DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
+	}, // 2
+	{
+		ExpectedErr: Error{"The object metadata is missing the internal KMS key-ID for SSE-S3"},
+		Metadata:    map[string]string{SSEIV: "", SSESealAlgorithm: "", S3SealedKey: ""}, DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
+	}, // 3
+	{
+		ExpectedErr: Error{"The object metadata is missing the internal sealed KMS data key for SSE-S3"},
+		Metadata:    map[string]string{SSEIV: "", SSESealAlgorithm: "", S3SealedKey: "", S3KMSKeyID: ""},
+		DataKey:     []byte{}, KeyID: "", SealedKey: SealedKey{},
+	}, // 4
+	{
+		ExpectedErr: errInvalidInternalIV,
+		Metadata:    map[string]string{SSEIV: "", SSESealAlgorithm: "", S3SealedKey: "", S3KMSKeyID: "", S3KMSSealedKey: ""},
+		DataKey:     []byte{}, KeyID: "", SealedKey: SealedKey{},
+	}, // 5
+	{
+		ExpectedErr: errInvalidInternalSealAlgorithm,
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: "", S3SealedKey: "", S3KMSKeyID: "", S3KMSSealedKey: "",
+		},
+		DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
+	}, // 6
+	{
+		ExpectedErr: Error{"The internal sealed key for SSE-S3 is invalid"},
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm, S3SealedKey: "",
+			S3KMSKeyID: "", S3KMSSealedKey: "",
+		},
+		DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{},
+	}, // 7
+	{
+		ExpectedErr: Error{"The internal sealed KMS data key for SSE-S3 is invalid"},
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm,
+			S3SealedKey: base64.StdEncoding.EncodeToString(make([]byte, 64)), S3KMSKeyID: "key-1",
+			S3KMSSealedKey: ".MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=", // invalid base64
+		},
+		DataKey: []byte{}, KeyID: "key-1", SealedKey: SealedKey{},
+	}, // 8
+	{
+		ExpectedErr: nil,
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm,
+			S3SealedKey: base64.StdEncoding.EncodeToString(make([]byte, 64)), S3KMSKeyID: "", S3KMSSealedKey: "",
+		},
+		DataKey: []byte{}, KeyID: "", SealedKey: SealedKey{Algorithm: SealAlgorithm},
+	}, // 9
+	{
+		ExpectedErr: nil,
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(append([]byte{1}, make([]byte, 31)...)), SSESealAlgorithm: SealAlgorithm,
+			S3SealedKey: base64.StdEncoding.EncodeToString(append([]byte{1}, make([]byte, 63)...)), S3KMSKeyID: "key-1",
+			S3KMSSealedKey: base64.StdEncoding.EncodeToString(make([]byte, 48)),
+		},
+		DataKey: make([]byte, 48), KeyID: "key-1", SealedKey: SealedKey{Algorithm: SealAlgorithm, Key: [64]byte{1}, IV: [32]byte{1}},
+	}, // 10
+}
+
+func TestS3ParseMetadata(t *testing.T) {
+	for i, test := range s3ParseMetadataTests {
+		keyID, dataKey, sealedKey, err := S3.ParseMetadata(test.Metadata)
+		if err != test.ExpectedErr {
+			t.Errorf("Test %d: got error '%v' - want error '%v'", i, err, test.ExpectedErr)
+		}
+		if !bytes.Equal(dataKey, test.DataKey) {
+			t.Errorf("Test %d: got data key '%v' - want data key '%v'", i, dataKey, test.DataKey)
+		}
+		if keyID != test.KeyID {
+			t.Errorf("Test %d: got key-ID '%v' - want key-ID '%v'", i, keyID, test.KeyID)
+		}
+		if sealedKey.Algorithm != test.SealedKey.Algorithm {
+			t.Errorf("Test %d: got sealed key algorithm '%v' - want sealed key algorithm '%v'", i, sealedKey.Algorithm, test.SealedKey.Algorithm)
+		}
+		if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
+			t.Errorf("Test %d: got sealed key '%v' - want sealed key '%v'", i, sealedKey.Key, test.SealedKey.Key)
+		}
+		if !bytes.Equal(sealedKey.IV[:], test.SealedKey.IV[:]) {
+			t.Errorf("Test %d: got sealed key IV '%v' - want sealed key IV '%v'", i, sealedKey.IV, test.SealedKey.IV)
+		}
+	}
+}
+
+var ssecParseMetadataTests = []struct {
+	Metadata    map[string]string
+	ExpectedErr error
+
+	SealedKey SealedKey
+}{
+	{ExpectedErr: errMissingInternalIV, Metadata: map[string]string{}, SealedKey: SealedKey{}},                     // 0
+	{ExpectedErr: errMissingInternalSealAlgorithm, Metadata: map[string]string{SSEIV: ""}, SealedKey: SealedKey{}}, // 1
+	{
+		ExpectedErr: Error{"The object metadata is missing the internal sealed key for SSE-C"},
+		Metadata:    map[string]string{SSEIV: "", SSESealAlgorithm: ""}, SealedKey: SealedKey{},
+	}, // 2
+	{
+		ExpectedErr: errInvalidInternalIV,
+		Metadata:    map[string]string{SSEIV: "", SSESealAlgorithm: "", SSECSealedKey: ""}, SealedKey: SealedKey{},
+	}, // 3
+	{
+		ExpectedErr: errInvalidInternalSealAlgorithm,
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: "", SSECSealedKey: "",
+		},
+		SealedKey: SealedKey{},
+	}, // 4
+	{
+		ExpectedErr: Error{"The internal sealed key for SSE-C is invalid"},
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm, SSECSealedKey: "",
+		},
+		SealedKey: SealedKey{},
+	}, // 5
+	{
+		ExpectedErr: nil,
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(make([]byte, 32)), SSESealAlgorithm: SealAlgorithm,
+			SSECSealedKey: base64.StdEncoding.EncodeToString(make([]byte, 64)),
+		},
+		SealedKey: SealedKey{Algorithm: SealAlgorithm},
+	}, // 6
+	{
+		ExpectedErr: nil,
+		Metadata: map[string]string{
+			SSEIV: base64.StdEncoding.EncodeToString(append([]byte{1}, make([]byte, 31)...)), SSESealAlgorithm: InsecureSealAlgorithm,
+			SSECSealedKey: base64.StdEncoding.EncodeToString(append([]byte{1}, make([]byte, 63)...)),
+		},
+		SealedKey: SealedKey{Algorithm: InsecureSealAlgorithm, Key: [64]byte{1}, IV: [32]byte{1}},
+	}, // 7
+}
+
+func TestCreateMultipartMetadata(t *testing.T) {
+	metadata := CreateMultipartMetadata(nil)
+	if v, ok := metadata[SSEMultipart]; !ok || v != "" {
+		t.Errorf("Metadata is missing the correct value for '%s': got '%s' - want '%s'", SSEMultipart, v, "")
+	}
+}
+
+func TestSSECParseMetadata(t *testing.T) {
+	for i, test := range ssecParseMetadataTests {
+		sealedKey, err := SSEC.ParseMetadata(test.Metadata)
+		if err != test.ExpectedErr {
+			t.Errorf("Test %d: got error '%v' - want error '%v'", i, err, test.ExpectedErr)
+		}
+		if sealedKey.Algorithm != test.SealedKey.Algorithm {
+			t.Errorf("Test %d: got sealed key algorithm '%v' - want sealed key algorithm '%v'", i, sealedKey.Algorithm, test.SealedKey.Algorithm)
+		}
+		if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
+			t.Errorf("Test %d: got sealed key '%v' - want sealed key '%v'", i, sealedKey.Key, test.SealedKey.Key)
+		}
+		if !bytes.Equal(sealedKey.IV[:], test.SealedKey.IV[:]) {
+			t.Errorf("Test %d: got sealed key IV '%v' - want sealed key IV '%v'", i, sealedKey.IV, test.SealedKey.IV)
+		}
+	}
+}
+
+var s3CreateMetadataTests = []struct {
+	KeyID         string
+	SealedDataKey []byte
+	SealedKey     SealedKey
+}{
+	{KeyID: "", SealedDataKey: make([]byte, 48), SealedKey: SealedKey{Algorithm: SealAlgorithm}},
+	{KeyID: "cafebabe", SealedDataKey: make([]byte, 48), SealedKey: SealedKey{Algorithm: SealAlgorithm}},
+	{KeyID: "deadbeef", SealedDataKey: make([]byte, 32), SealedKey: SealedKey{IV: [32]byte{0xf7}, Key: [64]byte{0xea}, Algorithm: SealAlgorithm}},
+}
+
+func TestS3CreateMetadata(t *testing.T) {
+	defer func(disableLog bool) { logger.Disable = disableLog }(logger.Disable)
+	logger.Disable = true
+	for i, test := range s3CreateMetadataTests {
+		metadata := S3.CreateMetadata(nil, test.KeyID, test.SealedDataKey, test.SealedKey)
+		keyID, kmsKey, sealedKey, err := S3.ParseMetadata(metadata)
+		if err != nil {
+			t.Errorf("Test %d: failed to parse metadata: %v", i, err)
+			continue
+		}
+		if keyID != test.KeyID {
+			t.Errorf("Test %d: Key-ID mismatch: got '%s' - want '%s'", i, keyID, test.KeyID)
+		}
+		if !bytes.Equal(kmsKey, test.SealedDataKey) {
+			t.Errorf("Test %d: sealed KMS data mismatch: got '%v' - want '%v'", i, kmsKey, test.SealedDataKey)
+		}
+		if sealedKey.Algorithm != test.SealedKey.Algorithm {
+			t.Errorf("Test %d: seal algorithm mismatch: got '%s' - want '%s'", i, sealedKey.Algorithm, test.SealedKey.Algorithm)
+		}
+		if !bytes.Equal(sealedKey.IV[:], test.SealedKey.IV[:]) {
+			t.Errorf("Test %d: IV mismatch: got '%v' - want '%v'", i, sealedKey.IV, test.SealedKey.IV)
+		}
+		if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
+			t.Errorf("Test %d: sealed key mismatch: got '%v' - want '%v'", i, sealedKey.Key, test.SealedKey.Key)
+		}
+	}
+
+	defer func() {
+		if err := recover(); err == nil || err != logger.ErrCritical {
+			t.Errorf("Expected '%s' panic for invalid seal algorithm but got '%s'", logger.ErrCritical, err)
+		}
+	}()
+	_ = S3.CreateMetadata(nil, "", []byte{}, SealedKey{Algorithm: InsecureSealAlgorithm})
+}
+
+var ssecCreateMetadataTests = []struct {
+	KeyID         string
+	SealedDataKey []byte
+	SealedKey     SealedKey
+}{
+	{KeyID: "", SealedDataKey: make([]byte, 48), SealedKey: SealedKey{Algorithm: SealAlgorithm}},
+	{KeyID: "cafebabe", SealedDataKey: make([]byte, 48), SealedKey: SealedKey{Algorithm: SealAlgorithm}},
+	{KeyID: "deadbeef", SealedDataKey: make([]byte, 32), SealedKey: SealedKey{IV: [32]byte{0xf7}, Key: [64]byte{0xea}, Algorithm: SealAlgorithm}},
+}
+
+func TestSSECCreateMetadata(t *testing.T) {
+	defer func(disableLog bool) { logger.Disable = disableLog }(logger.Disable)
+	logger.Disable = true
+	for i, test := range ssecCreateMetadataTests {
+		metadata := SSEC.CreateMetadata(nil, test.SealedKey)
+		sealedKey, err := SSEC.ParseMetadata(metadata)
+		if err != nil {
+			t.Errorf("Test %d: failed to parse metadata: %v", i, err)
+			continue
+		}
+		if sealedKey.Algorithm != test.SealedKey.Algorithm {
+			t.Errorf("Test %d: seal algorithm mismatch: got '%s' - want '%s'", i, sealedKey.Algorithm, test.SealedKey.Algorithm)
+		}
+		if !bytes.Equal(sealedKey.IV[:], test.SealedKey.IV[:]) {
+			t.Errorf("Test %d: IV mismatch: got '%v' - want '%v'", i, sealedKey.IV, test.SealedKey.IV)
+		}
+		if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
+			t.Errorf("Test %d: sealed key mismatch: got '%v' - want '%v'", i, sealedKey.Key, test.SealedKey.Key)
+		}
+	}
+
+	defer func() {
+		if err := recover(); err == nil || err != logger.ErrCritical {
+			t.Errorf("Expected '%s' panic for invalid seal algorithm but got '%s'", logger.ErrCritical, err)
+		}
+	}()
+	_ = SSEC.CreateMetadata(nil, SealedKey{Algorithm: InsecureSealAlgorithm})
+}
+
+var isETagSealedTests = []struct {
+	ETag     string
+	IsSealed bool
+}{
+	{ETag: "", IsSealed: false},                                                                                                // 0
+	{ETag: "90682b8e8cc7609c4671e1d64c73fc30", IsSealed: false},                                                                // 1
+	{ETag: "f201040c9dc593e39ea004dc1323699bcd", IsSealed: true},                                                               // 2 not valid ciphertext but looks like sealed ETag
+	{ETag: "20000f00fba2ee2ae4845f725964eeb9e092edfabc7ab9f9239e8344341f769a51ce99b4801b0699b92b16a72fa94972", IsSealed: true}, // 3
+}
+
+func TestIsETagSealed(t *testing.T) {
+	for i, test := range isETagSealedTests {
+		etag, err := hex.DecodeString(test.ETag)
+		if err != nil {
+			t.Errorf("Test %d: failed to decode etag: %s", i, err)
+		}
+		if sealed := IsETagSealed(etag); sealed != test.IsSealed {
+			t.Errorf("Test %d: got %v - want %v", i, sealed, test.IsSealed)
+		}
+	}
+}
+
+var removeInternalEntriesTests = []struct {
+	Metadata, Expected map[string]string
+}{
+	{ // 0
+		Metadata: map[string]string{
+			SSEMultipart:     "",
+			SSEIV:            "",
+			SSESealAlgorithm: "",
+			SSECSealedKey:    "",
+			S3SealedKey:      "",
+			S3KMSKeyID:       "",
+			S3KMSSealedKey:   "",
+		},
+		Expected: map[string]string{},
+	},
+	{ // 1
+		Metadata: map[string]string{
+			SSEMultipart:         "",
+			SSEIV:                "",
+			"X-Amz-Meta-A":       "X",
+			"X-Minio-Internal-B": "Y",
+		},
+		Expected: map[string]string{
+			"X-Amz-Meta-A":       "X",
+			"X-Minio-Internal-B": "Y",
+		},
+	},
+}
+
+func TestRemoveInternalEntries(t *testing.T) {
+	isEqual := func(x, y map[string]string) bool {
+		if len(x) != len(y) {
+			return false
+		}
+		for k, v := range x {
+			if u, ok := y[k]; !ok || v != u {
+				return false
+			}
+		}
+		return true
+	}
+
+	for i, test := range removeInternalEntriesTests {
+		RemoveInternalEntries(test.Metadata)
+		if !isEqual(test.Metadata, test.Expected) {
+			t.Errorf("Test %d: got %v - want %v", i, test.Metadata, test.Expected)
+		}
+	}
+}

cmd/crypto/sse.go

@@ -18,6 +18,8 @@ import (
 	"context"
 	"errors"
 	"io"
+	"net/http"
+	"path"
 
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/ioutil"
@@ -25,16 +27,103 @@ import (
 )
 
 const (
+	// SSEMultipart is the metadata key indicating that the object
+	// was uploaded using the S3 multipart API and stored using
+	// some from of server-side-encryption.
+	SSEMultipart = "X-Minio-Internal-Encrypted-Multipart"
+
+	// SSEIV is the metadata key referencing the random initialization
+	// vector (IV) used for SSE-S3 and SSE-C key derivation.
+	SSEIV = "X-Minio-Internal-Server-Side-Encryption-Iv"
+
+	// SSESealAlgorithm is the metadata key referencing the algorithm
+	// used by SSE-C and SSE-S3 to encrypt the object.
+	SSESealAlgorithm = "X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm"
+
+	// SSECSealedKey is the metadata key referencing the sealed object-key for SSE-C.
+	SSECSealedKey = "X-Minio-Internal-Server-Side-Encryption-Sealed-Key"
+
 	// S3SealedKey is the metadata key referencing the sealed object-key for SSE-S3.
 	S3SealedKey = "X-Minio-Internal-Server-Side-Encryption-S3-Sealed-Key"
+
 	// S3KMSKeyID is the metadata key referencing the KMS key-id used to
 	// generate/decrypt the S3-KMS-Sealed-Key. It is only used for SSE-S3 + KMS.
 	S3KMSKeyID = "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id"
+
 	// S3KMSSealedKey is the metadata key referencing the encrypted key generated
 	// by KMS. It is only used for SSE-S3 + KMS.
 	S3KMSSealedKey = "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Sealed-Key"
 )
 
+const (
+	// SealAlgorithm is the encryption/sealing algorithm used to derive & seal
+	// the key-encryption-key and to en/decrypt the object data.
+	SealAlgorithm = "DAREv2-HMAC-SHA256"
+
+	// InsecureSealAlgorithm is the legacy encryption/sealing algorithm used
+	// to derive & seal the key-encryption-key and to en/decrypt the object data.
+	// This algorithm should not be used for new objects because its key derivation
+	// is not optimal. See: https://github.com/minio/minio/pull/6121
+	InsecureSealAlgorithm = "DARE-SHA256"
+)
+
+// String returns the SSE domain as string. For SSE-S3 the
+// domain is "SSE-S3".
+func (s3) String() string { return "SSE-S3" }
+
+// UnsealObjectKey extracts and decrypts the sealed object key
+// from the metadata using KMS and returns the decrypted object
+// key.
+func (sse s3) UnsealObjectKey(kms KMS, metadata map[string]string, bucket, object string) (key ObjectKey, err error) {
+	keyID, kmsKey, sealedKey, err := sse.ParseMetadata(metadata)
+	if err != nil {
+		return
+	}
+	unsealKey, err := kms.UnsealKey(keyID, kmsKey, Context{bucket: path.Join(bucket, object)})
+	if err != nil {
+		return
+	}
+	err = key.Unseal(unsealKey, sealedKey, sse.String(), bucket, object)
+	return
+}
+
+// String returns the SSE domain as string. For SSE-C the
+// domain is "SSE-C".
+func (ssec) String() string { return "SSE-C" }
+
+// UnsealObjectKey extracts and decrypts the sealed object key
+// from the metadata using the SSE-C client key of the HTTP headers
+// and returns the decrypted object key.
+func (sse ssec) UnsealObjectKey(h http.Header, metadata map[string]string, bucket, object string) (key ObjectKey, err error) {
+	clientKey, err := sse.ParseHTTP(h)
+	if err != nil {
+		return
+	}
+	return unsealObjectKey(clientKey, metadata, bucket, object)
+}
+
+// UnsealObjectKey extracts and decrypts the sealed object key
+// from the metadata using the SSE-Copy client key of the HTTP headers
+// and returns the decrypted object key.
+func (sse ssecCopy) UnsealObjectKey(h http.Header, metadata map[string]string, bucket, object string) (key ObjectKey, err error) {
+	clientKey, err := sse.ParseHTTP(h)
+	if err != nil {
+		return
+	}
+	return unsealObjectKey(clientKey, metadata, bucket, object)
+}
+
+// unsealObjectKey decrypts and returns the sealed object key
+// from the metadata using the SSE-C client key.
+func unsealObjectKey(clientKey [32]byte, metadata map[string]string, bucket, object string) (key ObjectKey, err error) {
+	sealedKey, err := SSEC.ParseMetadata(metadata)
+	if err != nil {
+		return
+	}
+	err = key.Unseal(clientKey, sealedKey, SSEC.String(), bucket, object)
+	return
+}
+
 // EncryptSinglePart encrypts an io.Reader which must be the
 // the body of a single-part PUT request.
 func EncryptSinglePart(r io.Reader, key ObjectKey) io.Reader {
@@ -45,6 +134,14 @@ func EncryptSinglePart(r io.Reader, key ObjectKey) io.Reader {
 	return r
 }
 
+// EncryptMultiPart encrypts an io.Reader which must be the body of
+// multi-part PUT request. It derives an unique encryption key from
+// the partID and the object key.
+func EncryptMultiPart(r io.Reader, partID int, key ObjectKey) io.Reader {
+	partKey := key.DerivePartKey(uint32(partID))
+	return EncryptSinglePart(r, ObjectKey(partKey))
+}
+
 // DecryptSinglePart decrypts an io.Writer which must an object
 // uploaded with the single-part PUT API. The offset and length
 // specify the requested range.

cmd/crypto/sse_test.go

@@ -0,0 +1,226 @@
+// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crypto
+
+import (
+	"net/http"
+	"testing"
+)
+
+func TestS3String(t *testing.T) {
+	const Domain = "SSE-S3"
+	if domain := S3.String(); domain != Domain {
+		t.Errorf("S3's string method returns wrong domain: got '%s' - want '%s'", domain, Domain)
+	}
+}
+
+func TestSSECString(t *testing.T) {
+	const Domain = "SSE-C"
+	if domain := SSEC.String(); domain != Domain {
+		t.Errorf("SSEC's string method returns wrong domain: got '%s' - want '%s'", domain, Domain)
+	}
+}
+
+var ssecUnsealObjectKeyTests = []struct {
+	Headers        http.Header
+	Bucket, Object string
+	Metadata       map[string]string
+
+	ExpectedErr error
+}{
+	{ // 0 - Valid HTTP headers and valid metadata entries for bucket/object
+		Headers: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Bucket: "bucket",
+		Object: "object",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key":     "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
+			"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256",
+			"X-Minio-Internal-Server-Side-Encryption-Iv":             "coVfGS3I/CTrqexX5vUN+PQPoP9aUFiPYYrSzqTWfBA=",
+		},
+		ExpectedErr: nil,
+	},
+	{ // 1 - Valid HTTP headers but invalid metadata entries for bucket/object2
+		Headers: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Bucket: "bucket",
+		Object: "object2",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key":     "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
+			"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256",
+			"X-Minio-Internal-Server-Side-Encryption-Iv":             "coVfGS3I/CTrqexX5vUN+PQPoP9aUFiPYYrSzqTWfBA=",
+		},
+		ExpectedErr: ErrSecretKeyMismatch,
+	},
+	{ // 2 - Valid HTTP headers but invalid metadata entries for bucket/object
+		Headers: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Bucket: "bucket",
+		Object: "object",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key": "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
+			"X-Minio-Internal-Server-Side-Encryption-Iv":         "coVfGS3I/CTrqexX5vUN+PQPoP9aUFiPYYrSzqTWfBA=",
+		},
+		ExpectedErr: errMissingInternalSealAlgorithm,
+	},
+	{ // 3 - Invalid HTTP headers for valid metadata entries for bucket/object
+		Headers: http.Header{
+			"X-Amz-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+		},
+		Bucket: "bucket",
+		Object: "object",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key":     "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
+			"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256",
+			"X-Minio-Internal-Server-Side-Encryption-Iv":             "coVfGS3I/CTrqexX5vUN+PQPoP9aUFiPYYrSzqTWfBA=",
+		},
+		ExpectedErr: ErrMissingCustomerKeyMD5,
+	},
+}
+
+func TestSSECUnsealObjectKey(t *testing.T) {
+	for i, test := range ssecUnsealObjectKeyTests {
+		if _, err := SSEC.UnsealObjectKey(test.Headers, test.Metadata, test.Bucket, test.Object); err != test.ExpectedErr {
+			t.Errorf("Test %d: got: %v - want: %v", i, err, test.ExpectedErr)
+		}
+	}
+}
+
+var sseCopyUnsealObjectKeyTests = []struct {
+	Headers        http.Header
+	Bucket, Object string
+	Metadata       map[string]string
+
+	ExpectedErr error
+}{
+	{ // 0 - Valid HTTP headers and valid metadata entries for bucket/object
+		Headers: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Bucket: "bucket",
+		Object: "object",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key":     "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
+			"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256",
+			"X-Minio-Internal-Server-Side-Encryption-Iv":             "coVfGS3I/CTrqexX5vUN+PQPoP9aUFiPYYrSzqTWfBA=",
+		},
+		ExpectedErr: nil,
+	},
+	{ // 1 - Valid HTTP headers but invalid metadata entries for bucket/object2
+		Headers: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Bucket: "bucket",
+		Object: "object2",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key":     "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
+			"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256",
+			"X-Minio-Internal-Server-Side-Encryption-Iv":             "coVfGS3I/CTrqexX5vUN+PQPoP9aUFiPYYrSzqTWfBA=",
+		},
+		ExpectedErr: ErrSecretKeyMismatch,
+	},
+	{ // 2 - Valid HTTP headers but invalid metadata entries for bucket/object
+		Headers: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-Md5":   []string{"7PpPLAK26ONlVUGOWlusfg=="},
+		},
+		Bucket: "bucket",
+		Object: "object",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key": "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
+			"X-Minio-Internal-Server-Side-Encryption-Iv":         "coVfGS3I/CTrqexX5vUN+PQPoP9aUFiPYYrSzqTWfBA=",
+		},
+		ExpectedErr: errMissingInternalSealAlgorithm,
+	},
+	{ // 3 - Invalid HTTP headers for valid metadata entries for bucket/object
+		Headers: http.Header{
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm": []string{"AES256"},
+			"X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key":       []string{"MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ="},
+		},
+		Bucket: "bucket",
+		Object: "object",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Sealed-Key":     "IAAfAMBdYor5tf/UlVaQvwYlw5yKbPBeQqfygqsfHqhu1wHD9KDAP4bw38AhL12prFTS23JbbR9Re5Qv26ZnlQ==",
+			"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm": "DAREv2-HMAC-SHA256",
+			"X-Minio-Internal-Server-Side-Encryption-Iv":             "coVfGS3I/CTrqexX5vUN+PQPoP9aUFiPYYrSzqTWfBA=",
+		},
+		ExpectedErr: ErrMissingCustomerKeyMD5,
+	},
+}
+
+func TestSSECopyUnsealObjectKey(t *testing.T) {
+	for i, test := range sseCopyUnsealObjectKeyTests {
+		if _, err := SSECopy.UnsealObjectKey(test.Headers, test.Metadata, test.Bucket, test.Object); err != test.ExpectedErr {
+			t.Errorf("Test %d: got: %v - want: %v", i, err, test.ExpectedErr)
+		}
+	}
+}
+
+var s3UnsealObjectKeyTests = []struct {
+	KMS            KMS
+	Bucket, Object string
+	Metadata       map[string]string
+
+	ExpectedErr error
+}{
+	{ // 0 - Valid KMS key-ID and valid metadata entries for bucket/object
+		KMS:    NewKMS([32]byte{}),
+		Bucket: "bucket",
+		Object: "object",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Iv":                "hhVY0LKR1YtZbzAKxTWUfZt5enDfYX6Fxz1ma8Kiudc=",
+			"X-Minio-Internal-Server-Side-Encryption-S3-Sealed-Key":     "IAAfALhsOeD5AE3s5Zgq3DZ5VFGsOa3B0ksVC86veDcaj+fXv2U0VadhPaOKYr9Emd5ssOsO0uIhIIrKiOy9rA==",
+			"X-Minio-Internal-Server-Side-Encryption-S3-Kms-Sealed-Key": "IAAfAMRS2iw45FsfiF3QXajSYVWj1lxMpQm6DxDGPtADCX6fJQQ4atHBtfpgqJFyeQmIHsm0FBI+UlHw1Lv4ug==",
+			"X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id":     "test-key-1",
+			"X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm":    "DAREv2-HMAC-SHA256",
+		},
+		ExpectedErr: nil,
+	},
+	{ // 1 - Valid KMS key-ID for invalid metadata entries for bucket/object
+		KMS:    NewKMS([32]byte{}),
+		Bucket: "bucket",
+		Object: "object",
+		Metadata: map[string]string{
+			"X-Minio-Internal-Server-Side-Encryption-Iv":                "hhVY0LKR1YtZbzAKxTWUfZt5enDfYX6Fxz1ma8Kiudc=",
+			"X-Minio-Internal-Server-Side-Encryption-S3-Sealed-Key":     "IAAfALhsOeD5AE3s5Zgq3DZ5VFGsOa3B0ksVC86veDcaj+fXv2U0VadhPaOKYr9Emd5ssOsO0uIhIIrKiOy9rA==",
+			"X-Minio-Internal-Server-Side-Encryption-S3-Kms-Sealed-Key": "IAAfAMRS2iw45FsfiF3QXajSYVWj1lxMpQm6DxDGPtADCX6fJQQ4atHBtfpgqJFyeQmIHsm0FBI+UlHw1Lv4ug==",
+			"X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id":     "test-key-1",
+		},
+		ExpectedErr: errMissingInternalSealAlgorithm,
+	},
+}
+
+func TestS3UnsealObjectKey(t *testing.T) {
+	for i, test := range s3UnsealObjectKeyTests {
+		if _, err := S3.UnsealObjectKey(test.KMS, test.Metadata, test.Bucket, test.Object); err != test.ExpectedErr {
+			t.Errorf("Test %d: got: %v - want: %v", i, err, test.ExpectedErr)
+		}
+	}
+}

cmd/crypto/vault.go

@@ -0,0 +1,209 @@
+// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package crypto
+
+import (
+	"bytes"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	vault "github.com/hashicorp/vault/api"
+)
+
+var (
+	//ErrKMSAuthLogin is raised when there is a failure authenticating to KMS
+	ErrKMSAuthLogin = errors.New("Vault service did not return auth info")
+)
+
+// VaultKey represents vault encryption key-ring.
+type VaultKey struct {
+	Name    string `json:"name"`    // The name of the encryption key-ring
+	Version int    `json:"version"` // The key version
+}
+
+// VaultAuth represents vault authentication type.
+// Currently the only supported authentication type is AppRole.
+type VaultAuth struct {
+	Type    string       `json:"type"`    // The authentication type
+	AppRole VaultAppRole `json:"approle"` // The AppRole authentication credentials
+}
+
+// VaultAppRole represents vault AppRole authentication credentials
+type VaultAppRole struct {
+	ID     string `json:"id"`     // The AppRole access ID
+	Secret string `json:"secret"` // The AppRole secret
+}
+
+// VaultConfig represents vault configuration.
+type VaultConfig struct {
+	Endpoint  string    `json:"endpoint"` // The vault API endpoint as URL
+	CAPath    string    `json:"-"`        // The path to PEM-encoded certificate files used for mTLS. Currently not used in config file.
+	Auth      VaultAuth `json:"auth"`     // The vault authentication configuration
+	Key       VaultKey  `json:"key-id"`   // The named key used for key-generation / decryption.
+	Namespace string    `json:"-"`        // The vault namespace of enterprise vault instances
+}
+
+// vaultService represents a connection to a vault KMS.
+type vaultService struct {
+	config        *VaultConfig
+	client        *vault.Client
+	leaseDuration time.Duration
+}
+
+var _ KMS = (*vaultService)(nil) // compiler check that *vaultService implements KMS
+
+// empty/default vault configuration used to check whether a particular is empty.
+var emptyVaultConfig = VaultConfig{}
+
+// IsEmpty returns true if the vault config struct is an
+// empty configuration.
+func (v *VaultConfig) IsEmpty() bool { return *v == emptyVaultConfig }
+
+// Verify returns a nil error if the vault configuration
+// is valid. A valid configuration is either empty or
+// contains valid non-default values.
+func (v *VaultConfig) Verify() (err error) {
+	if v.IsEmpty() {
+		return // an empty configuration is valid
+	}
+	switch {
+	case v.Endpoint == "":
+		err = errors.New("crypto: missing hashicorp vault endpoint")
+	case strings.ToLower(v.Auth.Type) != "approle":
+		err = fmt.Errorf("crypto: invalid hashicorp vault authentication type: %s is not supported", v.Auth.Type)
+	case v.Auth.AppRole.ID == "":
+		err = errors.New("crypto: missing hashicorp vault AppRole ID")
+	case v.Auth.AppRole.Secret == "":
+		err = errors.New("crypto: missing hashicorp vault AppSecret ID")
+	case v.Key.Name == "":
+		err = errors.New("crypto: missing hashicorp vault key name")
+	case v.Key.Version < 0:
+		err = errors.New("crypto: invalid hashicorp vault key version: The key version must not be negative")
+	}
+	return
+}
+
+// NewVault initializes Hashicorp Vault KMS by authenticating
+// to Vault with the credentials in config and gets a client
+// token for future api calls.
+func NewVault(config VaultConfig) (KMS, error) {
+	if config.IsEmpty() {
+		return nil, errors.New("crypto: the hashicorp vault configuration must not be empty")
+	}
+	if err := config.Verify(); err != nil {
+		return nil, err
+	}
+
+	vaultCfg := vault.Config{Address: config.Endpoint}
+	if err := vaultCfg.ConfigureTLS(&vault.TLSConfig{CAPath: config.CAPath}); err != nil {
+		return nil, err
+	}
+	client, err := vault.NewClient(&vaultCfg)
+	if err != nil {
+		return nil, err
+	}
+	if config.Namespace != "" {
+		client.SetNamespace(config.Namespace)
+	}
+
+	payload := map[string]interface{}{
+		"role_id":   config.Auth.AppRole.ID,
+		"secret_id": config.Auth.AppRole.Secret,
+	}
+	resp, err := client.Logical().Write("auth/approle/login", payload)
+	if err != nil {
+		return nil, err
+	}
+	if resp.Auth == nil {
+		return nil, ErrKMSAuthLogin
+	}
+
+	client.SetToken(resp.Auth.ClientToken)
+	v := &vaultService{client: client, config: &config, leaseDuration: time.Duration(resp.Auth.LeaseDuration)}
+	v.renewToken()
+	return v, nil
+}
+
+// renewToken starts a new go-routine which renews
+// the vault authentication token periodically.
+func (v *vaultService) renewToken() {
+	retryDelay := 1 * time.Minute
+	go func() {
+		for {
+			s, err := v.client.Auth().Token().RenewSelf(int(v.leaseDuration))
+			if err != nil {
+				time.Sleep(retryDelay)
+				continue
+			}
+			nextRenew := s.Auth.LeaseDuration / 2
+			time.Sleep(time.Duration(nextRenew) * time.Second)
+		}
+	}()
+}
+
+// GenerateKey returns a new plaintext key, generated by the KMS,
+// and a sealed version of this plaintext key encrypted using the
+// named key referenced by keyID. It also binds the generated key
+// cryptographically to the provided context.
+func (v *vaultService) GenerateKey(keyID string, ctx Context) (key [32]byte, sealedKey []byte, err error) {
+	var contextStream bytes.Buffer
+	ctx.WriteTo(&contextStream)
+
+	payload := map[string]interface{}{
+		"context": base64.StdEncoding.EncodeToString(contextStream.Bytes()),
+	}
+	s, err := v.client.Logical().Write(fmt.Sprintf("/transit/datakey/plaintext/%s", keyID), payload)
+	if err != nil {
+		return key, sealedKey, err
+	}
+	sealKey := s.Data["ciphertext"].(string)
+	plainKey, err := base64.StdEncoding.DecodeString(s.Data["plaintext"].(string))
+	if err != nil {
+		return key, sealedKey, err
+	}
+	copy(key[:], []byte(plainKey))
+	return key, []byte(sealKey), nil
+}
+
+// UnsealKey returns the decrypted sealedKey as plaintext key.
+// Therefore it sends the sealedKey to the KMS which decrypts
+// it using the named key referenced by keyID and responses with
+// the plaintext key.
+//
+// The context must be same context as the one provided while
+// generating the plaintext key / sealedKey.
+func (v *vaultService) UnsealKey(keyID string, sealedKey []byte, ctx Context) (key [32]byte, err error) {
+	var contextStream bytes.Buffer
+	ctx.WriteTo(&contextStream)
+
+	payload := map[string]interface{}{
+		"ciphertext": string(sealedKey),
+		"context":    base64.StdEncoding.EncodeToString(contextStream.Bytes()),
+	}
+	s, err := v.client.Logical().Write(fmt.Sprintf("/transit/decrypt/%s", keyID), payload)
+	if err != nil {
+		return key, err
+	}
+	base64Key := s.Data["plaintext"].(string)
+	plainKey, err := base64.StdEncoding.DecodeString(base64Key)
+	if err != nil {
+		return key, err
+	}
+	copy(key[:], []byte(plainKey))
+	return key, nil
+}

cmd/disk-cache-config.go

@@ -18,6 +18,7 @@ package cmd
 
 import (
 	"encoding/json"
+	"errors"
 	"path/filepath"
 	"strings"
 
@@ -44,6 +45,15 @@ func (cfg *CacheConfig) UnmarshalJSON(data []byte) (err error) {
 	if err = json.Unmarshal(data, _cfg); err != nil {
 		return err
 	}
+
+	if _cfg.Expiry < 0 {
+		return errors.New("config expiry value should not be negative")
+	}
+
+	if _cfg.MaxUse < 0 {
+		return errors.New("config max use value should not be null or negative")
+	}
+
 	if _, err = parseCacheDrives(_cfg.Drives); err != nil {
 		return err
 	}

cmd/disk-cache-fs.go

@@ -30,7 +30,6 @@ import (
 
 	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/disk"
-	"github.com/minio/minio/pkg/hash"
 	"github.com/minio/minio/pkg/lock"
 )
 
@@ -258,7 +257,7 @@ func (cfs *cacheFSObjects) IsOnline() bool {
 }
 
 // Caches the object to disk
-func (cfs *cacheFSObjects) Put(ctx context.Context, bucket, object string, data *hash.Reader, metadata map[string]string) error {
+func (cfs *cacheFSObjects) Put(ctx context.Context, bucket, object string, data *PutObjReader, metadata map[string]string, opts ObjectOptions) error {
 	if cfs.diskUsageHigh() {
 		select {
 		case cfs.purgeChan <- struct{}{}:
@@ -275,7 +274,7 @@ func (cfs *cacheFSObjects) Put(ctx context.Context, bucket, object string, data
 			return pErr
 		}
 	}
-	_, err := cfs.PutObject(ctx, bucket, object, data, metadata)
+	_, err := cfs.PutObject(ctx, bucket, object, data, metadata, opts)
 	// if err is due to disk being offline , mark cache drive as offline
 	if IsErr(err, baseErrs...) {
 		cfs.setOnline(false)
@@ -284,8 +283,8 @@ func (cfs *cacheFSObjects) Put(ctx context.Context, bucket, object string, data
 }
 
 // Returns the handle for the cached object
-func (cfs *cacheFSObjects) Get(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string) (err error) {
-	return cfs.GetObject(ctx, bucket, object, startOffset, length, writer, etag)
+func (cfs *cacheFSObjects) Get(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error) {
+	return cfs.GetObject(ctx, bucket, object, startOffset, length, writer, etag, opts)
 }
 
 // Deletes the cached object
@@ -295,13 +294,14 @@ func (cfs *cacheFSObjects) Delete(ctx context.Context, bucket, object string) (e
 
 // convenience function to check if object is cached on this cacheFSObjects
 func (cfs *cacheFSObjects) Exists(ctx context.Context, bucket, object string) bool {
-	_, err := cfs.GetObjectInfo(ctx, bucket, object)
+	_, err := cfs.GetObjectInfo(ctx, bucket, object, ObjectOptions{})
 	return err == nil
 }
 
 // Identical to fs PutObject operation except that it uses ETag in metadata
 // headers.
-func (cfs *cacheFSObjects) PutObject(ctx context.Context, bucket string, object string, data *hash.Reader, metadata map[string]string) (objInfo ObjectInfo, retErr error) {
+func (cfs *cacheFSObjects) PutObject(ctx context.Context, bucket string, object string, r *PutObjReader, metadata map[string]string, opts ObjectOptions) (objInfo ObjectInfo, retErr error) {
+	data := r.Reader
 	fs := cfs.FSObjects
 	// Lock the object.
 	objectLock := fs.nsMutex.NewNSLock(bucket, object)
@@ -354,7 +354,7 @@ func (cfs *cacheFSObjects) PutObject(ctx context.Context, bucket string, object
 	}
 
 	// Validate input data size and it can never be less than zero.
-	if data.Size() < 0 {
+	if data.Size() < -1 {
 		logger.LogIf(ctx, errInvalidArgument)
 		return ObjectInfo{}, errInvalidArgument
 	}
@@ -438,7 +438,7 @@ func (cfs *cacheFSObjects) PutObject(ctx context.Context, bucket string, object
 // Implements S3 compatible initiate multipart API. Operation here is identical
 // to fs backend implementation - with the exception that cache FS uses the uploadID
 // generated on the backend
-func (cfs *cacheFSObjects) NewMultipartUpload(ctx context.Context, bucket, object string, meta map[string]string, uploadID string) (string, error) {
+func (cfs *cacheFSObjects) NewMultipartUpload(ctx context.Context, bucket, object string, meta map[string]string, uploadID string, opts ObjectOptions) (string, error) {
 	if cfs.diskUsageHigh() {
 		select {
 		case cfs.purgeChan <- struct{}{}:

cmd/disk-cache.go

@@ -31,18 +31,14 @@ import (
 
 	"github.com/djherbis/atime"
 
+	"github.com/minio/minio/cmd/crypto"
 	"github.com/minio/minio/cmd/logger"
-	"github.com/minio/minio/pkg/wildcard"
-
 	"github.com/minio/minio/pkg/hash"
+	"github.com/minio/minio/pkg/wildcard"
 )
 
-// list of all errors that can be ignored in tree walk operation in disk cache
-var cacheTreeWalkIgnoredErrs = append(baseIgnoredErrs, errDiskAccessDenied, errVolumeNotFound, errFileNotFound)
-
 const (
-	// disk cache needs to have cacheSizeMultiplier * object size space free for a cache entry to be created.
-	cacheSizeMultiplier  = 100
+	// disk cache needs to have  object size space free for a cache entry to be created.
 	cacheTrashDir        = "trash"
 	cacheCleanupInterval = 10 // in minutes
 )
@@ -61,18 +57,19 @@ type cacheObjects struct {
 	// file path patterns to exclude from cache
 	exclude []string
 	// Object functions pointing to the corresponding functions of backend implementation.
-	GetObjectFn               func(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string) (err error)
-	GetObjectInfoFn           func(ctx context.Context, bucket, object string) (objInfo ObjectInfo, err error)
-	PutObjectFn               func(ctx context.Context, bucket, object string, data *hash.Reader, metadata map[string]string) (objInfo ObjectInfo, err error)
+	GetObjectNInfoFn          func(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lockType LockType, opts ObjectOptions) (gr *GetObjectReader, err error)
+	GetObjectFn               func(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error)
+	GetObjectInfoFn           func(ctx context.Context, bucket, object string, opts ObjectOptions) (objInfo ObjectInfo, err error)
+	PutObjectFn               func(ctx context.Context, bucket, object string, data *PutObjReader, metadata map[string]string, opts ObjectOptions) (objInfo ObjectInfo, err error)
 	DeleteObjectFn            func(ctx context.Context, bucket, object string) error
 	ListObjectsFn             func(ctx context.Context, bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error)
 	ListObjectsV2Fn           func(ctx context.Context, bucket, prefix, continuationToken, delimiter string, maxKeys int, fetchOwner bool, startAfter string) (result ListObjectsV2Info, err error)
 	ListBucketsFn             func(ctx context.Context) (buckets []BucketInfo, err error)
 	GetBucketInfoFn           func(ctx context.Context, bucket string) (bucketInfo BucketInfo, err error)
-	NewMultipartUploadFn      func(ctx context.Context, bucket, object string, metadata map[string]string) (uploadID string, err error)
-	PutObjectPartFn           func(ctx context.Context, bucket, object, uploadID string, partID int, data *hash.Reader) (info PartInfo, err error)
+	NewMultipartUploadFn      func(ctx context.Context, bucket, object string, metadata map[string]string, opts ObjectOptions) (uploadID string, err error)
+	PutObjectPartFn           func(ctx context.Context, bucket, object, uploadID string, partID int, data *PutObjReader, opts ObjectOptions) (info PartInfo, err error)
 	AbortMultipartUploadFn    func(ctx context.Context, bucket, object, uploadID string) error
-	CompleteMultipartUploadFn func(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart) (objInfo ObjectInfo, err error)
+	CompleteMultipartUploadFn func(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error)
 	DeleteBucketFn            func(ctx context.Context, bucket string) error
 }
 
@@ -92,21 +89,27 @@ type CacheObjectLayer interface {
 	ListBuckets(ctx context.Context) (buckets []BucketInfo, err error)
 	DeleteBucket(ctx context.Context, bucket string) error
 	// Object operations.
-	GetObject(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string) (err error)
-	GetObjectInfo(ctx context.Context, bucket, object string) (objInfo ObjectInfo, err error)
-	PutObject(ctx context.Context, bucket, object string, data *hash.Reader, metadata map[string]string) (objInfo ObjectInfo, err error)
+	GetObjectNInfo(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lockType LockType, opts ObjectOptions) (gr *GetObjectReader, err error)
+	GetObject(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error)
+	GetObjectInfo(ctx context.Context, bucket, object string, opts ObjectOptions) (objInfo ObjectInfo, err error)
+	PutObject(ctx context.Context, bucket, object string, data *PutObjReader, metadata map[string]string, opts ObjectOptions) (objInfo ObjectInfo, err error)
 	DeleteObject(ctx context.Context, bucket, object string) error
 
 	// Multipart operations.
-	NewMultipartUpload(ctx context.Context, bucket, object string, metadata map[string]string) (uploadID string, err error)
-	PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data *hash.Reader) (info PartInfo, err error)
+	NewMultipartUpload(ctx context.Context, bucket, object string, metadata map[string]string, opts ObjectOptions) (uploadID string, err error)
+	PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data *PutObjReader, opts ObjectOptions) (info PartInfo, err error)
 	AbortMultipartUpload(ctx context.Context, bucket, object, uploadID string) error
-	CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart) (objInfo ObjectInfo, err error)
+	CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error)
 
 	// Storage operations.
 	StorageInfo(ctx context.Context) CacheStorageInfo
 }
 
+// IsCacheable returns if the object should be saved in the cache.
+func (o ObjectInfo) IsCacheable() bool {
+	return !crypto.IsEncrypted(o.UserDefined)
+}
+
 // backendDownError returns true if err is due to backend failure or faulty disk if in server mode
 func backendDownError(err error) bool {
 	_, backendDown := err.(BackendDown)
@@ -179,22 +182,99 @@ func (c cacheObjects) getMetadata(objInfo ObjectInfo) map[string]string {
 	return metadata
 }
 
+func (c cacheObjects) GetObjectNInfo(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lockType LockType, opts ObjectOptions) (gr *GetObjectReader, err error) {
+	if c.isCacheExclude(bucket, object) {
+		return c.GetObjectNInfoFn(ctx, bucket, object, rs, h, writeLock, opts)
+	}
+
+	// fetch cacheFSObjects if object is currently cached or nearest available cache drive
+	dcache, err := c.cache.getCachedFSLoc(ctx, bucket, object)
+	if err != nil {
+		return c.GetObjectNInfoFn(ctx, bucket, object, rs, h, writeLock, opts)
+	}
+
+	cacheReader, cacheErr := dcache.GetObjectNInfo(ctx, bucket, object, rs, h, lockType, opts)
+
+	objInfo, err := c.GetObjectInfoFn(ctx, bucket, object, opts)
+	if backendDownError(err) && cacheErr == nil {
+		return cacheReader, nil
+	} else if err != nil {
+		if _, ok := err.(ObjectNotFound); ok {
+			// Delete cached entry if backend object was deleted.
+			dcache.Delete(ctx, bucket, object)
+		}
+		return nil, err
+	}
+
+	if !objInfo.IsCacheable() || filterFromCache(objInfo.UserDefined) {
+		return c.GetObjectNInfoFn(ctx, bucket, object, rs, h, writeLock, opts)
+	}
+
+	if cacheErr == nil {
+		if cacheReader.ObjInfo.ETag == objInfo.ETag && !isStaleCache(objInfo) {
+			// Object is not stale, so serve from cache
+			return cacheReader, nil
+		}
+		cacheReader.Close()
+		// Object is stale, so delete from cache
+		dcache.Delete(ctx, bucket, object)
+	}
+
+	// Since we got here, we are serving the request from backend,
+	// and also adding the object to the cache.
+
+	if rs != nil {
+		// We don't cache partial objects.
+		return c.GetObjectNInfoFn(ctx, bucket, object, rs, h, writeLock, opts)
+	}
+	if !dcache.diskAvailable(objInfo.Size) {
+		return c.GetObjectNInfoFn(ctx, bucket, object, rs, h, writeLock, opts)
+	}
+
+	bkReader, bkErr := c.GetObjectNInfoFn(ctx, bucket, object, rs, h, writeLock, opts)
+	if bkErr != nil {
+		return nil, bkErr
+	}
+
+	// Initialize pipe.
+	pipeReader, pipeWriter := io.Pipe()
+	teeReader := io.TeeReader(bkReader, pipeWriter)
+	hashReader, herr := hash.NewReader(pipeReader, bkReader.ObjInfo.Size, "", "", bkReader.ObjInfo.Size)
+	if herr != nil {
+		bkReader.Close()
+		return nil, herr
+	}
+
+	go func() {
+		opts := ObjectOptions{}
+		putErr := dcache.Put(ctx, bucket, object, NewPutObjReader(hashReader, nil, nil), c.getMetadata(bkReader.ObjInfo), opts)
+		// close the write end of the pipe, so the error gets
+		// propagated to getObjReader
+		pipeWriter.CloseWithError(putErr)
+	}()
+
+	cleanupBackend := func() { bkReader.Close() }
+	cleanupPipe := func() { pipeReader.Close() }
+	gr = NewGetObjectReaderFromReader(teeReader, bkReader.ObjInfo, cleanupBackend, cleanupPipe)
+	return gr, nil
+}
+
 // Uses cached-object to serve the request. If object is not cached it serves the request from the backend and also
 // stores it in the cache for serving subsequent requests.
-func (c cacheObjects) GetObject(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string) (err error) {
+func (c cacheObjects) GetObject(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error) {
 	GetObjectFn := c.GetObjectFn
 	GetObjectInfoFn := c.GetObjectInfoFn
 
 	if c.isCacheExclude(bucket, object) {
-		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag)
+		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag, opts)
 	}
 	// fetch cacheFSObjects if object is currently cached or nearest available cache drive
 	dcache, err := c.cache.getCachedFSLoc(ctx, bucket, object)
 	if err != nil {
-		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag)
+		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag, opts)
 	}
 	// stat object on backend
-	objInfo, err := GetObjectInfoFn(ctx, bucket, object)
+	objInfo, err := GetObjectInfoFn(ctx, bucket, object, opts)
 	backendDown := backendDownError(err)
 	if err != nil && !backendDown {
 		if _, ok := err.(ObjectNotFound); ok {
@@ -204,43 +284,43 @@ func (c cacheObjects) GetObject(ctx context.Context, bucket, object string, star
 		return err
 	}
 
-	if !backendDown && filterFromCache(objInfo.UserDefined) {
-		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag)
+	if !backendDown && !objInfo.IsCacheable() {
+		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag, opts)
 	}
 
-	cachedObjInfo, err := dcache.GetObjectInfo(ctx, bucket, object)
+	if !backendDown && filterFromCache(objInfo.UserDefined) {
+		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag, opts)
+	}
+
+	cachedObjInfo, err := dcache.GetObjectInfo(ctx, bucket, object, opts)
 	if err == nil {
 		if backendDown {
 			// If the backend is down, serve the request from cache.
-			return dcache.Get(ctx, bucket, object, startOffset, length, writer, etag)
+			return dcache.Get(ctx, bucket, object, startOffset, length, writer, etag, opts)
 		}
 		if cachedObjInfo.ETag == objInfo.ETag && !isStaleCache(objInfo) {
-			return dcache.Get(ctx, bucket, object, startOffset, length, writer, etag)
+			return dcache.Get(ctx, bucket, object, startOffset, length, writer, etag, opts)
 		}
 		dcache.Delete(ctx, bucket, object)
 	}
-	if startOffset != 0 || length != objInfo.Size {
+	if startOffset != 0 || (length > 0 && length != objInfo.Size) {
 		// We don't cache partial objects.
-		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag)
+		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag, opts)
 	}
-	if !dcache.diskAvailable(objInfo.Size * cacheSizeMultiplier) {
-		// cache only objects < 1/100th of disk capacity
-		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag)
+	if !dcache.diskAvailable(objInfo.Size) {
+		return GetObjectFn(ctx, bucket, object, startOffset, length, writer, etag, opts)
 	}
 	// Initialize pipe.
 	pipeReader, pipeWriter := io.Pipe()
-	hashReader, err := hash.NewReader(pipeReader, objInfo.Size, "", "")
+	hashReader, err := hash.NewReader(pipeReader, objInfo.Size, "", "", objInfo.Size)
 	if err != nil {
 		return err
 	}
 	go func() {
-		if err = GetObjectFn(ctx, bucket, object, 0, objInfo.Size, io.MultiWriter(writer, pipeWriter), etag); err != nil {
-			pipeWriter.CloseWithError(err)
-			return
-		}
-		pipeWriter.Close() // Close writer explicitly signaling we wrote all data.
+		gerr := GetObjectFn(ctx, bucket, object, 0, objInfo.Size, io.MultiWriter(writer, pipeWriter), etag, opts)
+		pipeWriter.CloseWithError(gerr) // Close writer explicitly signaling we wrote all data.
 	}()
-	err = dcache.Put(ctx, bucket, object, hashReader, c.getMetadata(objInfo))
+	err = dcache.Put(ctx, bucket, object, NewPutObjReader(hashReader, nil, nil), c.getMetadata(objInfo), opts)
 	if err != nil {
 		return err
 	}
@@ -249,17 +329,17 @@ func (c cacheObjects) GetObject(ctx context.Context, bucket, object string, star
 }
 
 // Returns ObjectInfo from cache if available.
-func (c cacheObjects) GetObjectInfo(ctx context.Context, bucket, object string) (ObjectInfo, error) {
+func (c cacheObjects) GetObjectInfo(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error) {
 	getObjectInfoFn := c.GetObjectInfoFn
 	if c.isCacheExclude(bucket, object) {
-		return getObjectInfoFn(ctx, bucket, object)
+		return getObjectInfoFn(ctx, bucket, object, opts)
 	}
 	// fetch cacheFSObjects if object is currently cached or nearest available cache drive
 	dcache, err := c.cache.getCachedFSLoc(ctx, bucket, object)
 	if err != nil {
-		return getObjectInfoFn(ctx, bucket, object)
+		return getObjectInfoFn(ctx, bucket, object, opts)
 	}
-	objInfo, err := getObjectInfoFn(ctx, bucket, object)
+	objInfo, err := getObjectInfoFn(ctx, bucket, object, opts)
 	if err != nil {
 		if _, ok := err.(ObjectNotFound); ok {
 			// Delete the cached entry if backend object was deleted.
@@ -270,14 +350,14 @@ func (c cacheObjects) GetObjectInfo(ctx context.Context, bucket, object string)
 			return ObjectInfo{}, err
 		}
 		// when backend is down, serve from cache.
-		cachedObjInfo, cerr := dcache.GetObjectInfo(ctx, bucket, object)
+		cachedObjInfo, cerr := dcache.GetObjectInfo(ctx, bucket, object, opts)
 		if cerr == nil {
 			return cachedObjInfo, nil
 		}
 		return ObjectInfo{}, BackendDown{}
 	}
 	// when backend is up, do a sanity check on cached object
-	cachedObjInfo, err := dcache.GetObjectInfo(ctx, bucket, object)
+	cachedObjInfo, err := dcache.GetObjectInfo(ctx, bucket, object, opts)
 	if err != nil {
 		return objInfo, nil
 	}
@@ -291,40 +371,32 @@ func (c cacheObjects) GetObjectInfo(ctx context.Context, bucket, object string)
 // Returns function "listDir" of the type listDirFunc.
 // isLeaf - is used by listDir function to check if an entry is a leaf or non-leaf entry.
 // disks - list of fsObjects
-func listDirCacheFactory(isLeaf isLeafFunc, treeWalkIgnoredErrs []error, disks []*cacheFSObjects) listDirFunc {
-	listCacheDirs := func(bucket, prefixDir, prefixEntry string) (dirs []string, err error) {
+func listDirCacheFactory(isLeaf isLeafFunc, disks []*cacheFSObjects) listDirFunc {
+	listCacheDirs := func(bucket, prefixDir, prefixEntry string) (dirs []string) {
 		var entries []string
 		for _, disk := range disks {
 			// ignore disk-caches that might be missing/offline
 			if disk == nil {
 				continue
 			}
-			fs := disk.FSObjects
-			entries, err = readDir(pathJoin(fs.fsPath, bucket, prefixDir))
 
-			// For any reason disk was deleted or goes offline, continue
-			// and list from other disks if possible.
+			fs := disk.FSObjects
+			var err error
+			entries, err = readDir(pathJoin(fs.fsPath, bucket, prefixDir))
 			if err != nil {
-				if IsErrIgnored(err, treeWalkIgnoredErrs...) {
-					continue
-				}
-				return nil, err
+				continue
 			}
 
 			// Filter entries that have the prefix prefixEntry.
 			entries = filterMatchingPrefix(entries, prefixEntry)
 			dirs = append(dirs, entries...)
 		}
-		return dirs, nil
+		return dirs
 	}
 
 	// listDir - lists all the entries at a given prefix and given entry in the prefix.
-	listDir := func(bucket, prefixDir, prefixEntry string) (mergedEntries []string, delayIsLeaf bool, err error) {
-		var cacheEntries []string
-		cacheEntries, err = listCacheDirs(bucket, prefixDir, prefixEntry)
-		if err != nil {
-			return nil, false, err
-		}
+	listDir := func(bucket, prefixDir, prefixEntry string) (mergedEntries []string, delayIsLeaf bool) {
+		cacheEntries := listCacheDirs(bucket, prefixDir, prefixEntry)
 		for _, entry := range cacheEntries {
 			// Find elements in entries which are not in mergedEntries
 			idx := sort.SearchStrings(mergedEntries, entry)
@@ -335,7 +407,7 @@ func listDirCacheFactory(isLeaf isLeafFunc, treeWalkIgnoredErrs []error, disks [
 			mergedEntries = append(mergedEntries, entry)
 			sort.Strings(mergedEntries)
 		}
-		return mergedEntries, false, nil
+		return mergedEntries, false
 	}
 	return listDir
 }
@@ -371,7 +443,7 @@ func (c cacheObjects) listCacheObjects(ctx context.Context, bucket, prefix, mark
 			return fs.isObjectDir(bucket, object)
 		}
 
-		listDir := listDirCacheFactory(isLeaf, cacheTreeWalkIgnoredErrs, c.cache.cfs)
+		listDir := listDirCacheFactory(isLeaf, c.cache.cfs)
 		walkResultCh = startTreeWalk(ctx, bucket, prefix, marker, recursive, listDir, isLeaf, isLeafDir, endWalkCh)
 	}
 
@@ -572,42 +644,43 @@ func (c cacheObjects) isCacheExclude(bucket, object string) bool {
 }
 
 // PutObject - caches the uploaded object for single Put operations
-func (c cacheObjects) PutObject(ctx context.Context, bucket, object string, r *hash.Reader, metadata map[string]string) (objInfo ObjectInfo, err error) {
+func (c cacheObjects) PutObject(ctx context.Context, bucket, object string, r *PutObjReader, metadata map[string]string, opts ObjectOptions) (objInfo ObjectInfo, err error) {
 	putObjectFn := c.PutObjectFn
+	data := r.Reader
 	dcache, err := c.cache.getCacheFS(ctx, bucket, object)
 	if err != nil {
 		// disk cache could not be located,execute backend call.
-		return putObjectFn(ctx, bucket, object, r, metadata)
+		return putObjectFn(ctx, bucket, object, r, metadata, opts)
 	}
 	size := r.Size()
 
 	// fetch from backend if there is no space on cache drive
-	if !dcache.diskAvailable(size * cacheSizeMultiplier) {
-		return putObjectFn(ctx, bucket, object, r, metadata)
+	if !dcache.diskAvailable(size) {
+		return putObjectFn(ctx, bucket, object, r, metadata, opts)
 	}
 	// fetch from backend if cache exclude pattern or cache-control
 	// directive set to exclude
 	if c.isCacheExclude(bucket, object) || filterFromCache(metadata) {
 		dcache.Delete(ctx, bucket, object)
-		return putObjectFn(ctx, bucket, object, r, metadata)
+		return putObjectFn(ctx, bucket, object, r, metadata, opts)
 	}
 	objInfo = ObjectInfo{}
 	// Initialize pipe to stream data to backend
 	pipeReader, pipeWriter := io.Pipe()
-	hashReader, err := hash.NewReader(pipeReader, size, r.MD5HexString(), r.SHA256HexString())
+	hashReader, err := hash.NewReader(pipeReader, size, data.MD5HexString(), data.SHA256HexString(), data.ActualSize())
 	if err != nil {
 		return ObjectInfo{}, err
 	}
 	// Initialize pipe to stream data to cache
 	rPipe, wPipe := io.Pipe()
-	cHashReader, err := hash.NewReader(rPipe, size, r.MD5HexString(), r.SHA256HexString())
+	cHashReader, err := hash.NewReader(rPipe, size, data.MD5HexString(), data.SHA256HexString(), data.ActualSize())
 	if err != nil {
 		return ObjectInfo{}, err
 	}
 	oinfoCh := make(chan ObjectInfo)
 	errCh := make(chan error)
 	go func() {
-		oinfo, perr := putObjectFn(ctx, bucket, object, hashReader, metadata)
+		oinfo, perr := putObjectFn(ctx, bucket, object, NewPutObjReader(hashReader, nil, nil), metadata, opts)
 		if perr != nil {
 			pipeWriter.CloseWithError(perr)
 			wPipe.CloseWithError(perr)
@@ -620,14 +693,14 @@ func (c cacheObjects) PutObject(ctx context.Context, bucket, object string, r *h
 	}()
 
 	go func() {
-		if err = dcache.Put(ctx, bucket, object, cHashReader, metadata); err != nil {
+		if err = dcache.Put(ctx, bucket, object, NewPutObjReader(cHashReader, nil, nil), metadata, opts); err != nil {
 			wPipe.CloseWithError(err)
 			return
 		}
 	}()
 
 	mwriter := io.MultiWriter(pipeWriter, wPipe)
-	_, err = io.Copy(mwriter, r)
+	_, err = io.Copy(mwriter, data)
 	if err != nil {
 		err = <-errCh
 		return objInfo, err
@@ -639,68 +712,69 @@ func (c cacheObjects) PutObject(ctx context.Context, bucket, object string, r *h
 }
 
 // NewMultipartUpload - Starts a new multipart upload operation to backend and cache.
-func (c cacheObjects) NewMultipartUpload(ctx context.Context, bucket, object string, metadata map[string]string) (uploadID string, err error) {
+func (c cacheObjects) NewMultipartUpload(ctx context.Context, bucket, object string, metadata map[string]string, opts ObjectOptions) (uploadID string, err error) {
 	newMultipartUploadFn := c.NewMultipartUploadFn
 
 	if c.isCacheExclude(bucket, object) || filterFromCache(metadata) {
-		return newMultipartUploadFn(ctx, bucket, object, metadata)
+		return newMultipartUploadFn(ctx, bucket, object, metadata, opts)
 	}
 
 	dcache, err := c.cache.getCacheFS(ctx, bucket, object)
 	if err != nil {
 		// disk cache could not be located,execute backend call.
-		return newMultipartUploadFn(ctx, bucket, object, metadata)
+		return newMultipartUploadFn(ctx, bucket, object, metadata, opts)
 	}
 
-	uploadID, err = newMultipartUploadFn(ctx, bucket, object, metadata)
+	uploadID, err = newMultipartUploadFn(ctx, bucket, object, metadata, opts)
 	if err != nil {
 		return
 	}
 	// create new multipart upload in cache with same uploadID
-	dcache.NewMultipartUpload(ctx, bucket, object, metadata, uploadID)
+	dcache.NewMultipartUpload(ctx, bucket, object, metadata, uploadID, opts)
 	return uploadID, err
 }
 
 // PutObjectPart - uploads part to backend and cache simultaneously.
-func (c cacheObjects) PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data *hash.Reader) (info PartInfo, err error) {
+func (c cacheObjects) PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, r *PutObjReader, opts ObjectOptions) (info PartInfo, err error) {
+	data := r.Reader
 	putObjectPartFn := c.PutObjectPartFn
 	dcache, err := c.cache.getCacheFS(ctx, bucket, object)
 	if err != nil {
 		// disk cache could not be located,execute backend call.
-		return putObjectPartFn(ctx, bucket, object, uploadID, partID, data)
+		return putObjectPartFn(ctx, bucket, object, uploadID, partID, r, opts)
 	}
 
 	if c.isCacheExclude(bucket, object) {
-		return putObjectPartFn(ctx, bucket, object, uploadID, partID, data)
+		return putObjectPartFn(ctx, bucket, object, uploadID, partID, r, opts)
 	}
 
-	// make sure cache has at least cacheSizeMultiplier * size available
+	// make sure cache has at least size space available
 	size := data.Size()
-	if !dcache.diskAvailable(size * cacheSizeMultiplier) {
+	if !dcache.diskAvailable(size) {
 		select {
 		case dcache.purgeChan <- struct{}{}:
 		default:
 		}
-		return putObjectPartFn(ctx, bucket, object, uploadID, partID, data)
+		return putObjectPartFn(ctx, bucket, object, uploadID, partID, r, opts)
 	}
 
 	info = PartInfo{}
 	// Initialize pipe to stream data to backend
 	pipeReader, pipeWriter := io.Pipe()
-	hashReader, err := hash.NewReader(pipeReader, size, data.MD5HexString(), data.SHA256HexString())
+	hashReader, err := hash.NewReader(pipeReader, size, data.MD5HexString(), data.SHA256HexString(), data.ActualSize())
 	if err != nil {
 		return
 	}
 	// Initialize pipe to stream data to cache
 	rPipe, wPipe := io.Pipe()
-	cHashReader, err := hash.NewReader(rPipe, size, data.MD5HexString(), data.SHA256HexString())
+	cHashReader, err := hash.NewReader(rPipe, size, data.MD5HexString(), data.SHA256HexString(), data.ActualSize())
 	if err != nil {
 		return
 	}
 	pinfoCh := make(chan PartInfo)
 	errorCh := make(chan error)
 	go func() {
-		info, err = putObjectPartFn(ctx, bucket, object, uploadID, partID, hashReader)
+		info, err = putObjectPartFn(ctx, bucket, object, uploadID, partID, NewPutObjReader(hashReader, nil, nil), opts)
 		if err != nil {
 			close(pinfoCh)
 			pipeWriter.CloseWithError(err)
@@ -712,7 +786,7 @@ func (c cacheObjects) PutObjectPart(ctx context.Context, bucket, object, uploadI
 		pinfoCh <- info
 	}()
 	go func() {
-		if _, perr := dcache.PutObjectPart(ctx, bucket, object, uploadID, partID, cHashReader); perr != nil {
+		if _, perr := dcache.PutObjectPart(ctx, bucket, object, uploadID, partID, NewPutObjReader(cHashReader, nil, nil), opts); perr != nil {
 			wPipe.CloseWithError(perr)
 			return
 		}
@@ -754,25 +828,25 @@ func (c cacheObjects) AbortMultipartUpload(ctx context.Context, bucket, object,
 }
 
 // CompleteMultipartUpload - completes multipart upload operation on backend and cache.
-func (c cacheObjects) CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart) (objInfo ObjectInfo, err error) {
+func (c cacheObjects) CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error) {
 	completeMultipartUploadFn := c.CompleteMultipartUploadFn
 
 	if c.isCacheExclude(bucket, object) {
-		return completeMultipartUploadFn(ctx, bucket, object, uploadID, uploadedParts)
+		return completeMultipartUploadFn(ctx, bucket, object, uploadID, uploadedParts, opts)
 	}
 
 	dcache, err := c.cache.getCacheFS(ctx, bucket, object)
 	if err != nil {
 		// disk cache could not be located,execute backend call.
-		return completeMultipartUploadFn(ctx, bucket, object, uploadID, uploadedParts)
+		return completeMultipartUploadFn(ctx, bucket, object, uploadID, uploadedParts, opts)
 	}
 	// perform backend operation
-	objInfo, err = completeMultipartUploadFn(ctx, bucket, object, uploadID, uploadedParts)
+	objInfo, err = completeMultipartUploadFn(ctx, bucket, object, uploadID, uploadedParts, opts)
 	if err != nil {
 		return
 	}
 	// create new multipart upload in cache with same uploadID
-	dcache.CompleteMultipartUpload(ctx, bucket, object, uploadID, uploadedParts)
+	dcache.CompleteMultipartUpload(ctx, bucket, object, uploadID, uploadedParts, opts)
 	return
 }
 
@@ -888,14 +962,17 @@ func newServerCacheObjects(config CacheConfig) (CacheObjectLayer, error) {
 		cache:    dcache,
 		exclude:  config.Exclude,
 		listPool: newTreeWalkPool(globalLookupTimeout),
-		GetObjectFn: func(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string) error {
-			return newObjectLayerFn().GetObject(ctx, bucket, object, startOffset, length, writer, etag)
+		GetObjectFn: func(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) error {
+			return newObjectLayerFn().GetObject(ctx, bucket, object, startOffset, length, writer, etag, opts)
 		},
-		GetObjectInfoFn: func(ctx context.Context, bucket, object string) (ObjectInfo, error) {
-			return newObjectLayerFn().GetObjectInfo(ctx, bucket, object)
+		GetObjectInfoFn: func(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error) {
+			return newObjectLayerFn().GetObjectInfo(ctx, bucket, object, opts)
 		},
-		PutObjectFn: func(ctx context.Context, bucket, object string, data *hash.Reader, metadata map[string]string) (objInfo ObjectInfo, err error) {
-			return newObjectLayerFn().PutObject(ctx, bucket, object, data, metadata)
+		GetObjectNInfoFn: func(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lockType LockType, opts ObjectOptions) (gr *GetObjectReader, err error) {
+			return newObjectLayerFn().GetObjectNInfo(ctx, bucket, object, rs, h, lockType, opts)
+		},
+		PutObjectFn: func(ctx context.Context, bucket, object string, data *PutObjReader, metadata map[string]string, opts ObjectOptions) (objInfo ObjectInfo, err error) {
+			return newObjectLayerFn().PutObject(ctx, bucket, object, data, metadata, opts)
 		},
 		DeleteObjectFn: func(ctx context.Context, bucket, object string) error {
 			return newObjectLayerFn().DeleteObject(ctx, bucket, object)
@@ -912,17 +989,17 @@ func newServerCacheObjects(config CacheConfig) (CacheObjectLayer, error) {
 		GetBucketInfoFn: func(ctx context.Context, bucket string) (bucketInfo BucketInfo, err error) {
 			return newObjectLayerFn().GetBucketInfo(ctx, bucket)
 		},
-		NewMultipartUploadFn: func(ctx context.Context, bucket, object string, metadata map[string]string) (uploadID string, err error) {
-			return newObjectLayerFn().NewMultipartUpload(ctx, bucket, object, metadata)
+		NewMultipartUploadFn: func(ctx context.Context, bucket, object string, metadata map[string]string, opts ObjectOptions) (uploadID string, err error) {
+			return newObjectLayerFn().NewMultipartUpload(ctx, bucket, object, metadata, opts)
 		},
-		PutObjectPartFn: func(ctx context.Context, bucket, object, uploadID string, partID int, data *hash.Reader) (info PartInfo, err error) {
-			return newObjectLayerFn().PutObjectPart(ctx, bucket, object, uploadID, partID, data)
+		PutObjectPartFn: func(ctx context.Context, bucket, object, uploadID string, partID int, data *PutObjReader, opts ObjectOptions) (info PartInfo, err error) {
+			return newObjectLayerFn().PutObjectPart(ctx, bucket, object, uploadID, partID, data, opts)
 		},
 		AbortMultipartUploadFn: func(ctx context.Context, bucket, object, uploadID string) error {
 			return newObjectLayerFn().AbortMultipartUpload(ctx, bucket, object, uploadID)
 		},
-		CompleteMultipartUploadFn: func(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart) (objInfo ObjectInfo, err error) {
-			return newObjectLayerFn().CompleteMultipartUpload(ctx, bucket, object, uploadID, uploadedParts)
+		CompleteMultipartUploadFn: func(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error) {
+			return newObjectLayerFn().CompleteMultipartUpload(ctx, bucket, object, uploadID, uploadedParts, opts)
 		},
 		DeleteBucketFn: func(ctx context.Context, bucket string) error {
 			return newObjectLayerFn().DeleteBucket(ctx, bucket)

cmd/disk-cache_test.go

@@ -19,7 +19,6 @@ package cmd
 import (
 	"bytes"
 	"context"
-	"os"
 	"reflect"
 	"testing"
 	"time"
@@ -28,21 +27,15 @@ import (
 )
 
 // Initialize cache FS objects.
-func initCacheFSObjects(disk string, cacheMaxUse int, t *testing.T) (*cacheFSObjects, error) {
-	newTestConfig(globalMinioDefaultRegion)
-	var err error
-	obj, err := newCacheFSObjects(disk, globalCacheExpiry, cacheMaxUse)
-	if err != nil {
-		t.Fatal(err)
-	}
-	return obj, nil
+func initCacheFSObjects(disk string, cacheMaxUse int) (*cacheFSObjects, error) {
+	return newCacheFSObjects(disk, globalCacheExpiry, cacheMaxUse)
 }
 
 // inits diskCache struct for nDisks
 func initDiskCaches(drives []string, cacheMaxUse int, t *testing.T) (*diskCache, error) {
 	var cfs []*cacheFSObjects
 	for _, d := range drives {
-		obj, err := initCacheFSObjects(d, cacheMaxUse, t)
+		obj, err := initCacheFSObjects(d, cacheMaxUse)
 		if err != nil {
 			return nil, err
 		}
@@ -131,11 +124,6 @@ func TestGetCacheFSMaxUse(t *testing.T) {
 
 // test wildcard patterns for excluding entries from cache
 func TestCacheExclusion(t *testing.T) {
-	rootPath, err := newTestConfig(globalMinioDefaultRegion)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer os.RemoveAll(rootPath)
 	fsDirs, err := getRandomDisks(1)
 	if err != nil {
 		t.Fatal(err)
@@ -204,17 +192,18 @@ func TestDiskCache(t *testing.T) {
 	objInfo.ContentType = contentType
 	objInfo.ETag = etag
 	objInfo.UserDefined = httpMeta
+	opts := ObjectOptions{}
 
 	byteReader := bytes.NewReader([]byte(content))
-	hashReader, err := hash.NewReader(byteReader, int64(size), "", "")
+	hashReader, err := hash.NewReader(byteReader, int64(size), "", "", int64(size))
 	if err != nil {
 		t.Fatal(err)
 	}
-	err = cache.Put(ctx, bucketName, objectName, hashReader, httpMeta)
+	err = cache.Put(ctx, bucketName, objectName, NewPutObjReader(hashReader, nil, nil), httpMeta, opts)
 	if err != nil {
 		t.Fatal(err)
 	}
-	cachedObjInfo, err := cache.GetObjectInfo(ctx, bucketName, objectName)
+	cachedObjInfo, err := cache.GetObjectInfo(ctx, bucketName, objectName, opts)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -231,7 +220,7 @@ func TestDiskCache(t *testing.T) {
 		t.Fatal("Cached content-type does not match")
 	}
 	writer := bytes.NewBuffer(nil)
-	err = cache.Get(ctx, bucketName, objectName, 0, int64(size), writer, "")
+	err = cache.Get(ctx, bucketName, objectName, 0, int64(size), writer, "", opts)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -278,23 +267,24 @@ func TestDiskCacheMaxUse(t *testing.T) {
 	objInfo.ContentType = contentType
 	objInfo.ETag = etag
 	objInfo.UserDefined = httpMeta
+	opts := ObjectOptions{}
 
 	byteReader := bytes.NewReader([]byte(content))
-	hashReader, err := hash.NewReader(byteReader, int64(size), "", "")
+	hashReader, err := hash.NewReader(byteReader, int64(size), "", "", int64(size))
 	if err != nil {
 		t.Fatal(err)
 	}
 	if !cache.diskAvailable(int64(size)) {
-		err = cache.Put(ctx, bucketName, objectName, hashReader, httpMeta)
+		err = cache.Put(ctx, bucketName, objectName, NewPutObjReader(hashReader, nil, nil), httpMeta, opts)
 		if err != errDiskFull {
 			t.Fatal("Cache max-use limit violated.")
 		}
 	} else {
-		err = cache.Put(ctx, bucketName, objectName, hashReader, httpMeta)
+		err = cache.Put(ctx, bucketName, objectName, NewPutObjReader(hashReader, nil, nil), httpMeta, opts)
 		if err != nil {
 			t.Fatal(err)
 		}
-		cachedObjInfo, err := cache.GetObjectInfo(ctx, bucketName, objectName)
+		cachedObjInfo, err := cache.GetObjectInfo(ctx, bucketName, objectName, opts)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -311,7 +301,7 @@ func TestDiskCacheMaxUse(t *testing.T) {
 			t.Fatal("Cached content-type does not match")
 		}
 		writer := bytes.NewBuffer(nil)
-		err = cache.Get(ctx, bucketName, objectName, 0, int64(size), writer, "")
+		err = cache.Get(ctx, bucketName, objectName, 0, int64(size), writer, "", opts)
 		if err != nil {
 			t.Fatal(err)
 		}

cmd/dummy-data-generator_test.go

@@ -0,0 +1,182 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"testing"
+)
+
+var alphabets = []byte("abcdefghijklmnopqrstuvwxyz0123456789")
+
+// DummyDataGen returns a reader that repeats the bytes in `alphabets`
+// upto the desired length.
+type DummyDataGen struct {
+	b           []byte
+	idx, length int64
+}
+
+// NewDummyDataGen returns a ReadSeeker over the first `totalLength`
+// bytes from the infinite stream consisting of repeated
+// concatenations of `alphabets`.
+//
+// The skipOffset (generally = 0) can be used to skip a given number
+// of bytes from the beginning of the infinite stream. This is useful
+// to compare such streams of bytes that may be split up, because:
+//
+// Given the function:
+//
+// f := func(r io.Reader) string {
+//           b, _ := ioutil.ReadAll(r)
+//           return string(b)
+// }
+//
+// for example, the following is true:
+//
+// f(NewDummyDataGen(100, 0)) == f(NewDummyDataGen(50, 0)) + f(NewDummyDataGen(50, 50))
+func NewDummyDataGen(totalLength, skipOffset int64) io.ReadSeeker {
+	if totalLength < 0 {
+		panic("Negative length passed to DummyDataGen!")
+	}
+	if skipOffset < 0 {
+		panic("Negative rotations are not allowed")
+	}
+
+	skipOffset = skipOffset % int64(len(alphabets))
+	as := make([]byte, 2*len(alphabets))
+	copy(as, alphabets)
+	copy(as[len(alphabets):], alphabets)
+	b := as[skipOffset : skipOffset+int64(len(alphabets))]
+	return &DummyDataGen{
+		length: totalLength,
+		b:      b,
+	}
+}
+
+func (d *DummyDataGen) Read(b []byte) (n int, err error) {
+	k := len(b)
+	numLetters := int64(len(d.b))
+	for k > 0 && d.idx < d.length {
+		w := copy(b[len(b)-k:], d.b[d.idx%numLetters:])
+		k -= w
+		d.idx += int64(w)
+		n += w
+	}
+	if d.idx >= d.length {
+		extraBytes := d.idx - d.length
+		n -= int(extraBytes)
+		if n < 0 {
+			n = 0
+		}
+		err = io.EOF
+	}
+	return
+}
+
+func (d *DummyDataGen) Seek(offset int64, whence int) (int64, error) {
+	switch whence {
+	case io.SeekStart:
+		if offset < 0 {
+			return 0, errors.New("Invalid offset")
+		}
+		d.idx = offset
+	case io.SeekCurrent:
+		if d.idx+offset < 0 {
+			return 0, errors.New("Invalid offset")
+		}
+		d.idx += offset
+	case io.SeekEnd:
+		if d.length+offset < 0 {
+			return 0, errors.New("Invalid offset")
+		}
+		d.idx = d.length + offset
+	}
+	return d.idx, nil
+}
+
+func TestDummyDataGenerator(t *testing.T) {
+	readAll := func(r io.Reader) string {
+		b, _ := ioutil.ReadAll(r)
+		return string(b)
+	}
+	checkEq := func(a, b string) {
+		if a != b {
+			t.Fatalf("Unexpected equality failure")
+		}
+	}
+
+	checkEq(readAll(NewDummyDataGen(0, 0)), "")
+
+	checkEq(readAll(NewDummyDataGen(10, 0)), readAll(NewDummyDataGen(10, int64(len(alphabets)))))
+
+	checkEq(readAll(NewDummyDataGen(100, 0)), readAll(NewDummyDataGen(50, 0))+readAll(NewDummyDataGen(50, 50)))
+
+	r := NewDummyDataGen(100, 0)
+	r.Seek(int64(len(alphabets)), 0)
+	checkEq(readAll(r), readAll(NewDummyDataGen(100-int64(len(alphabets)), 0)))
+}
+
+// Compares all the bytes returned by the given readers. Any Read
+// errors cause a `false` result. A string describing the error is
+// also returned.
+func cmpReaders(r1, r2 io.Reader) (bool, string) {
+	bufLen := 32 * 1024
+	b1, b2 := make([]byte, bufLen), make([]byte, bufLen)
+	for i := 0; true; i++ {
+		n1, e1 := io.ReadFull(r1, b1)
+		n2, e2 := io.ReadFull(r2, b2)
+		if n1 != n2 {
+			return false, fmt.Sprintf("Read %d != %d bytes from the readers", n1, n2)
+		}
+		if !bytes.Equal(b1[:n1], b2[:n2]) {
+			return false, fmt.Sprintf("After reading %d equal buffers (32Kib each), we got the following two strings:\n%v\n%v\n",
+				i, b1, b2)
+		}
+		// Check if stream has ended
+		if (e1 == io.ErrUnexpectedEOF && e2 == io.ErrUnexpectedEOF) || (e1 == io.EOF && e2 == io.EOF) {
+			break
+		}
+		if e1 != nil || e2 != nil {
+			return false, fmt.Sprintf("Got unexpected error values: %v == %v", e1, e2)
+		}
+	}
+	return true, ""
+}
+
+func TestCmpReaders(t *testing.T) {
+	{
+		r1 := bytes.NewBuffer([]byte("abc"))
+		r2 := bytes.NewBuffer([]byte("abc"))
+		ok, msg := cmpReaders(r1, r2)
+		if !(ok && msg == "") {
+			t.Fatalf("unexpected")
+		}
+	}
+
+	{
+		r1 := bytes.NewBuffer([]byte("abc"))
+		r2 := bytes.NewBuffer([]byte("abcd"))
+		ok, _ := cmpReaders(r1, r2)
+		if ok {
+			t.Fatalf("unexpected")
+		}
+	}
+}

cmd/dummy-object-layer_test.go

@@ -19,9 +19,8 @@ package cmd
 import (
 	"context"
 	"io"
-	"time"
+	"net/http"
 
-	"github.com/minio/minio/pkg/hash"
 	"github.com/minio/minio/pkg/madmin"
 	"github.com/minio/minio/pkg/policy"
 )
@@ -60,19 +59,23 @@ func (api *DummyObjectLayer) ListObjectsV2(ctx context.Context, bucket, prefix,
 	return
 }
 
-func (api *DummyObjectLayer) GetObject(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string) (err error) {
+func (api *DummyObjectLayer) GetObjectNInfo(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lock LockType, opts ObjectOptions) (gr *GetObjectReader, err error) {
 	return
 }
 
-func (api *DummyObjectLayer) GetObjectInfo(ctx context.Context, bucket, object string) (objInfo ObjectInfo, err error) {
+func (api *DummyObjectLayer) GetObject(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error) {
 	return
 }
 
-func (api *DummyObjectLayer) PutObject(ctx context.Context, bucket, object string, data *hash.Reader, metadata map[string]string) (objInfo ObjectInfo, err error) {
+func (api *DummyObjectLayer) GetObjectInfo(ctx context.Context, bucket, object string, opts ObjectOptions) (objInfo ObjectInfo, err error) {
 	return
 }
 
-func (api *DummyObjectLayer) CopyObject(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, srcInfo ObjectInfo) (objInfo ObjectInfo, err error) {
+func (api *DummyObjectLayer) PutObject(ctx context.Context, bucket, object string, data *PutObjReader, metadata map[string]string, opts ObjectOptions) (objInfo ObjectInfo, err error) {
+	return
+}
+
+func (api *DummyObjectLayer) CopyObject(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, srcInfo ObjectInfo, srcOpts, dstOpts ObjectOptions) (objInfo ObjectInfo, err error) {
 	return
 }
 
@@ -84,15 +87,15 @@ func (api *DummyObjectLayer) ListMultipartUploads(ctx context.Context, bucket, p
 	return
 }
 
-func (api *DummyObjectLayer) NewMultipartUpload(ctx context.Context, bucket, object string, metadata map[string]string) (uploadID string, err error) {
+func (api *DummyObjectLayer) NewMultipartUpload(ctx context.Context, bucket, object string, metadata map[string]string, opts ObjectOptions) (uploadID string, err error) {
 	return
 }
 
-func (api *DummyObjectLayer) CopyObjectPart(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, uploadID string, partID int, startOffset int64, length int64, srcInfo ObjectInfo) (info PartInfo, err error) {
+func (api *DummyObjectLayer) CopyObjectPart(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, uploadID string, partID int, startOffset int64, length int64, srcInfo ObjectInfo, srcOpts, dstOpts ObjectOptions) (info PartInfo, err error) {
 	return
 }
 
-func (api *DummyObjectLayer) PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data *hash.Reader) (info PartInfo, err error) {
+func (api *DummyObjectLayer) PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data *PutObjReader, opts ObjectOptions) (info PartInfo, err error) {
 	return
 }
 
@@ -104,7 +107,7 @@ func (api *DummyObjectLayer) AbortMultipartUpload(ctx context.Context, bucket, o
 	return
 }
 
-func (api *DummyObjectLayer) CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart) (objInfo ObjectInfo, err error) {
+func (api *DummyObjectLayer) CompleteMultipartUpload(ctx context.Context, bucket, object, uploadID string, uploadedParts []CompletePart, opts ObjectOptions) (objInfo ObjectInfo, err error) {
 	return
 }
 
@@ -132,14 +135,6 @@ func (api *DummyObjectLayer) ListObjectsHeal(ctx context.Context, bucket, prefix
 	return
 }
 
-func (api *DummyObjectLayer) ListLocks(ctx context.Context, bucket, prefix string, duration time.Duration) (info []VolumeLockInfo, err error) {
-	return
-}
-
-func (api *DummyObjectLayer) ClearLocks(context.Context, []VolumeLockInfo) (err error) {
-	return
-}
-
 func (api *DummyObjectLayer) SetBucketPolicy(context.Context, string, *policy.Policy) (err error) {
 	return
 }
@@ -159,7 +154,14 @@ func (api *DummyObjectLayer) DeleteBucketPolicy(context.Context, string) (err er
 func (api *DummyObjectLayer) IsNotificationSupported() (b bool) {
 	return
 }
+func (api *DummyObjectLayer) IsListenBucketSupported() (b bool) {
+	return
+}
 
 func (api *DummyObjectLayer) IsEncryptionSupported() (b bool) {
 	return
 }
+
+func (api *DummyObjectLayer) IsCompressionSupported() (b bool) {
+	return
+}

cmd/encryption-v1_test.go

@@ -20,19 +20,51 @@ import (
 	"bytes"
 	"net/http"
 	"testing"
+
+	humanize "github.com/dustin/go-humanize"
+	"github.com/minio/minio/cmd/crypto"
+	"github.com/minio/sio"
 )
 
+var hasServerSideEncryptionHeaderTests = []struct {
+	headers    map[string]string
+	sseRequest bool
+}{
+	{headers: map[string]string{crypto.SSECAlgorithm: "AES256", crypto.SSECKey: "key", crypto.SSECKeyMD5: "md5"}, sseRequest: true},                             // 0
+	{headers: map[string]string{crypto.SSECAlgorithm: "AES256"}, sseRequest: true},                                                                              // 1
+	{headers: map[string]string{crypto.SSECKey: "key"}, sseRequest: true},                                                                                       // 2
+	{headers: map[string]string{crypto.SSECKeyMD5: "md5"}, sseRequest: true},                                                                                    // 3
+	{headers: map[string]string{}, sseRequest: false},                                                                                                           // 4
+	{headers: map[string]string{crypto.SSECopyAlgorithm + " ": "AES256", " " + crypto.SSECopyKey: "key", crypto.SSECopyKeyMD5 + " ": "md5"}, sseRequest: false}, // 5
+	{headers: map[string]string{crypto.SSECopyAlgorithm: "", crypto.SSECopyKey: "", crypto.SSECopyKeyMD5: ""}, sseRequest: false},                               // 6
+	{headers: map[string]string{crypto.SSEHeader: ""}, sseRequest: true},                                                                                        // 7
+}
+
+func TestHasServerSideEncryptionHeader(t *testing.T) {
+	for i, test := range hasServerSideEncryptionHeaderTests {
+		headers := http.Header{}
+		for k, v := range test.headers {
+			headers.Set(k, v)
+		}
+		if hasServerSideEncryptionHeader(headers) != test.sseRequest {
+			t.Errorf("Test %d: Expected hasServerSideEncryptionHeader to return %v", i, test.sseRequest)
+		}
+	}
+}
+
 var hasSSECopyCustomerHeaderTests = []struct {
 	headers    map[string]string
 	sseRequest bool
 }{
-	{headers: map[string]string{SSECopyCustomerAlgorithm: "AES256", SSECopyCustomerKey: "key", SSECopyCustomerKeyMD5: "md5"}, sseRequest: true},                    // 0
-	{headers: map[string]string{SSECopyCustomerAlgorithm: "AES256"}, sseRequest: true},                                                                             // 1
-	{headers: map[string]string{SSECopyCustomerKey: "key"}, sseRequest: true},                                                                                      // 2
-	{headers: map[string]string{SSECopyCustomerKeyMD5: "md5"}, sseRequest: true},                                                                                   // 3
-	{headers: map[string]string{}, sseRequest: false},                                                                                                              // 4
-	{headers: map[string]string{SSECopyCustomerAlgorithm + " ": "AES256", " " + SSECopyCustomerKey: "key", SSECopyCustomerKeyMD5 + " ": "md5"}, sseRequest: false}, // 5
-	{headers: map[string]string{SSECopyCustomerAlgorithm: "", SSECopyCustomerKey: "", SSECopyCustomerKeyMD5: ""}, sseRequest: false},                               // 6
+	{headers: map[string]string{crypto.SSECopyAlgorithm: "AES256", crypto.SSECopyKey: "key", crypto.SSECopyKeyMD5: "md5"}, sseRequest: true},                    // 0
+	{headers: map[string]string{crypto.SSECopyAlgorithm: "AES256"}, sseRequest: true},                                                                           // 1
+	{headers: map[string]string{crypto.SSECopyKey: "key"}, sseRequest: true},                                                                                    // 2
+	{headers: map[string]string{crypto.SSECopyKeyMD5: "md5"}, sseRequest: true},                                                                                 // 3
+	{headers: map[string]string{}, sseRequest: false},                                                                                                           // 4
+	{headers: map[string]string{crypto.SSECopyAlgorithm + " ": "AES256", " " + crypto.SSECopyKey: "key", crypto.SSECopyKeyMD5 + " ": "md5"}, sseRequest: false}, // 5
+	{headers: map[string]string{crypto.SSECopyAlgorithm: "", crypto.SSECopyKey: "", crypto.SSECopyKeyMD5: ""}, sseRequest: true},                                // 6
+	{headers: map[string]string{crypto.SSEHeader: ""}, sseRequest: false},                                                                                       // 7
+
 }
 
 func TestIsSSECopyCustomerRequest(t *testing.T) {
@@ -41,8 +73,8 @@ func TestIsSSECopyCustomerRequest(t *testing.T) {
 		for k, v := range test.headers {
 			headers.Set(k, v)
 		}
-		if hasSSECopyCustomerHeader(headers) != test.sseRequest {
-			t.Errorf("Test %d: Expected hasSSECopyCustomerHeader to return %v", i, test.sseRequest)
+		if crypto.SSECopy.IsRequested(headers) != test.sseRequest {
+			t.Errorf("Test %d: Expected crypto.SSECopy.IsRequested to return %v", i, test.sseRequest)
 		}
 	}
 }
@@ -51,250 +83,49 @@ var hasSSECustomerHeaderTests = []struct {
 	headers    map[string]string
 	sseRequest bool
 }{
-	{headers: map[string]string{SSECustomerAlgorithm: "AES256", SSECustomerKey: "key", SSECustomerKeyMD5: "md5"}, sseRequest: true},                    // 0
-	{headers: map[string]string{SSECustomerAlgorithm: "AES256"}, sseRequest: true},                                                                     // 1
-	{headers: map[string]string{SSECustomerKey: "key"}, sseRequest: true},                                                                              // 2
-	{headers: map[string]string{SSECustomerKeyMD5: "md5"}, sseRequest: true},                                                                           // 3
+	{headers: map[string]string{crypto.SSECAlgorithm: "AES256", crypto.SSECKey: "key", crypto.SSECKeyMD5: "md5"}, sseRequest: true},                    // 0
+	{headers: map[string]string{crypto.SSECAlgorithm: "AES256"}, sseRequest: true},                                                                     // 1
+	{headers: map[string]string{crypto.SSECKey: "key"}, sseRequest: true},                                                                              // 2
+	{headers: map[string]string{crypto.SSECKeyMD5: "md5"}, sseRequest: true},                                                                           // 3
 	{headers: map[string]string{}, sseRequest: false},                                                                                                  // 4
-	{headers: map[string]string{SSECustomerAlgorithm + " ": "AES256", " " + SSECustomerKey: "key", SSECustomerKeyMD5 + " ": "md5"}, sseRequest: false}, // 5
-	{headers: map[string]string{SSECustomerAlgorithm: "", SSECustomerKey: "", SSECustomerKeyMD5: ""}, sseRequest: false},                               // 6
+	{headers: map[string]string{crypto.SSECAlgorithm + " ": "AES256", " " + crypto.SSECKey: "key", crypto.SSECKeyMD5 + " ": "md5"}, sseRequest: false}, // 5
+	{headers: map[string]string{crypto.SSECAlgorithm: "", crypto.SSECKey: "", crypto.SSECKeyMD5: ""}, sseRequest: true},                                // 6
+	{headers: map[string]string{crypto.SSEHeader: ""}, sseRequest: false},                                                                              // 7
+
 }
 
-func TesthasSSECustomerHeader(t *testing.T) {
+func TestHasSSECustomerHeader(t *testing.T) {
 	for i, test := range hasSSECustomerHeaderTests {
 		headers := http.Header{}
 		for k, v := range test.headers {
 			headers.Set(k, v)
 		}
-		if hasSSECustomerHeader(headers) != test.sseRequest {
+		if crypto.SSEC.IsRequested(headers) != test.sseRequest {
 			t.Errorf("Test %d: Expected hasSSECustomerHeader to return %v", i, test.sseRequest)
 		}
 	}
 }
 
-var parseSSECustomerRequestTests = []struct {
-	headers map[string]string
-	useTLS  bool
-	err     error
-}{
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 0
-			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
-		},
-		useTLS: true, err: nil,
-	},
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 1
-			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
-		},
-		useTLS: false, err: errInsecureSSERequest,
-	},
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES 256",
-			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 2
-			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
-		},
-		useTLS: true, err: errInvalidSSEAlgorithm,
-	},
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "NjE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 3
-			SSECustomerKeyMD5:    "H+jq/LwEOEO90YtiTuNFVw==",
-		},
-		useTLS: true, err: errSSEKeyMD5Mismatch,
-	},
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       " jE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 4
-			SSECustomerKeyMD5:    "H+jq/LwEOEO90YtiTuNFVw==",
-		},
-		useTLS: true, err: errInvalidSSEKey,
-	},
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "NjE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 5
-			SSECustomerKeyMD5:    " +jq/LwEOEO90YtiTuNFVw==",
-		},
-		useTLS: true, err: errSSEKeyMD5Mismatch,
-	},
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "vFQ9ScFOF6Tu/BfzMS+rVMvlZGJHi5HmGJenJfrfKI45", // 6
-			SSECustomerKeyMD5:    "9KPgDdZNTHimuYCwnJTp5g==",
-		},
-		useTLS: true, err: errInvalidSSEKey,
-	},
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "", // 7
-			SSECustomerKeyMD5:    "9KPgDdZNTHimuYCwnJTp5g==",
-		},
-		useTLS: true, err: errMissingSSEKey,
-	},
-	{
-		headers: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "vFQ9ScFOF6Tu/BfzMS+rVMvlZGJHi5HmGJenJfrfKI45", // 8
-			SSECustomerKeyMD5:    "",
-		},
-		useTLS: true, err: errMissingSSEKeyMD5,
-	},
-}
-
-func TestParseSSECustomerRequest(t *testing.T) {
-	defer func(flag bool) { globalIsSSL = flag }(globalIsSSL)
-	for i, test := range parseSSECustomerRequestTests {
-		headers := http.Header{}
-		for k, v := range test.headers {
-			headers.Set(k, v)
-		}
-		request := &http.Request{}
-		request.Header = headers
-		globalIsSSL = test.useTLS
-
-		_, err := ParseSSECustomerRequest(request)
-		if err != test.err {
-			t.Errorf("Test %d: Parse returned: %v want: %v", i, err, test.err)
-		}
-		key := request.Header.Get(SSECustomerKey)
-		if (err == nil || err == errSSEKeyMD5Mismatch) && key != "" {
-			t.Errorf("Test %d: Client key survived parsing - found key: %v", i, key)
-		}
-
-	}
-}
-
-var parseSSECopyCustomerRequestTests = []struct {
-	headers map[string]string
-	useTLS  bool
-	err     error
-}{
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES256",
-			SSECopyCustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 0
-			SSECopyCustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
-		},
-		useTLS: true, err: nil,
-	},
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES256",
-			SSECopyCustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 1
-			SSECopyCustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
-		},
-		useTLS: false, err: errInsecureSSERequest,
-	},
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES 256",
-			SSECopyCustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 2
-			SSECopyCustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
-		},
-		useTLS: true, err: errInvalidSSEAlgorithm,
-	},
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES256",
-			SSECopyCustomerKey:       "NjE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 3
-			SSECopyCustomerKeyMD5:    "H+jq/LwEOEO90YtiTuNFVw==",
-		},
-		useTLS: true, err: errSSEKeyMD5Mismatch,
-	},
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES256",
-			SSECopyCustomerKey:       " jE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 4
-			SSECopyCustomerKeyMD5:    "H+jq/LwEOEO90YtiTuNFVw==",
-		},
-		useTLS: true, err: errInvalidSSEKey,
-	},
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES256",
-			SSECopyCustomerKey:       "NjE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 5
-			SSECopyCustomerKeyMD5:    " +jq/LwEOEO90YtiTuNFVw==",
-		},
-		useTLS: true, err: errSSEKeyMD5Mismatch,
-	},
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES256",
-			SSECopyCustomerKey:       "vFQ9ScFOF6Tu/BfzMS+rVMvlZGJHi5HmGJenJfrfKI45", // 6
-			SSECopyCustomerKeyMD5:    "9KPgDdZNTHimuYCwnJTp5g==",
-		},
-		useTLS: true, err: errInvalidSSEKey,
-	},
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES256",
-			SSECopyCustomerKey:       "", // 7
-			SSECopyCustomerKeyMD5:    "9KPgDdZNTHimuYCwnJTp5g==",
-		},
-		useTLS: true, err: errMissingSSEKey,
-	},
-	{
-		headers: map[string]string{
-			SSECopyCustomerAlgorithm: "AES256",
-			SSECopyCustomerKey:       "vFQ9ScFOF6Tu/BfzMS+rVMvlZGJHi5HmGJenJfrfKI45", // 8
-			SSECopyCustomerKeyMD5:    "",
-		},
-		useTLS: true, err: errMissingSSEKeyMD5,
-	},
-}
-
-func TestParseSSECopyCustomerRequest(t *testing.T) {
-	defer func(flag bool) { globalIsSSL = flag }(globalIsSSL)
-	for i, test := range parseSSECopyCustomerRequestTests {
-		headers := http.Header{}
-		for k, v := range test.headers {
-			headers.Set(k, v)
-		}
-		request := &http.Request{}
-		request.Header = headers
-		globalIsSSL = test.useTLS
-
-		_, err := ParseSSECopyCustomerRequest(request)
-		if err != test.err {
-			t.Errorf("Test %d: Parse returned: %v want: %v", i, err, test.err)
-		}
-		key := request.Header.Get(SSECopyCustomerKey)
-		if (err == nil || err == errSSEKeyMD5Mismatch) && key != "" {
-			t.Errorf("Test %d: Client key survived parsing - found key: %v", i, key)
-		}
-	}
-}
-
 var encryptRequestTests = []struct {
 	header   map[string]string
 	metadata map[string]string
 }{
 	{
 		header: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
-			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+			crypto.SSECAlgorithm: "AES256",
+			crypto.SSECKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			crypto.SSECKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
 		},
 		metadata: map[string]string{},
 	},
 	{
 		header: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
-			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+			crypto.SSECAlgorithm: "AES256",
+			crypto.SSECKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			crypto.SSECKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
 		},
 		metadata: map[string]string{
-			SSECustomerKey: "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			crypto.SSECKey: "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
 		},
 	},
 }
@@ -308,20 +139,18 @@ func TestEncryptRequest(t *testing.T) {
 		for k, v := range test.header {
 			req.Header.Set(k, v)
 		}
-		_, err := EncryptRequest(content, req, "bucket", "object", test.metadata)
+		_, _, err := EncryptRequest(content, req, "bucket", "object", test.metadata)
+
 		if err != nil {
 			t.Fatalf("Test %d: Failed to encrypt request: %v", i, err)
 		}
-		if key, ok := test.metadata[SSECustomerKey]; ok {
-			t.Errorf("Test %d: Client provided key survived in metadata - key: %s", i, key)
-		}
-		if kdf, ok := test.metadata[ServerSideEncryptionSealAlgorithm]; !ok {
+		if kdf, ok := test.metadata[crypto.SSESealAlgorithm]; !ok {
 			t.Errorf("Test %d: ServerSideEncryptionKDF must be part of metadata: %v", i, kdf)
 		}
-		if iv, ok := test.metadata[ServerSideEncryptionIV]; !ok {
-			t.Errorf("Test %d: ServerSideEncryptionIV must be part of metadata: %v", i, iv)
+		if iv, ok := test.metadata[crypto.SSEIV]; !ok {
+			t.Errorf("Test %d: crypto.SSEIV must be part of metadata: %v", i, iv)
 		}
-		if mac, ok := test.metadata[ServerSideEncryptionSealedKey]; !ok {
+		if mac, ok := test.metadata[crypto.SSECSealedKey]; !ok {
 			t.Errorf("Test %d: ServerSideEncryptionKeyMAC must be part of metadata: %v", i, mac)
 		}
 	}
@@ -337,14 +166,14 @@ var decryptRequestTests = []struct {
 		bucket: "bucket",
 		object: "object",
 		header: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=",
-			SSECustomerKeyMD5:    "7PpPLAK26ONlVUGOWlusfg==",
+			crypto.SSECAlgorithm: "AES256",
+			crypto.SSECKey:       "MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=",
+			crypto.SSECKeyMD5:    "7PpPLAK26ONlVUGOWlusfg==",
 		},
 		metadata: map[string]string{
-			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256,
-			ServerSideEncryptionIV:            "7nQqotA8xgrPx6QK7Ap3GCfjKitqJSrGP7xzgErSJlw=",
-			ServerSideEncryptionSealedKey:     "EAAfAAAAAAD7v1hQq3PFRUHsItalxmrJqrOq6FwnbXNarxOOpb8jTWONPPKyM3Gfjkjyj6NCf+aB/VpHCLCTBA==",
+			crypto.SSESealAlgorithm: SSESealAlgorithmDareSha256,
+			crypto.SSEIV:            "7nQqotA8xgrPx6QK7Ap3GCfjKitqJSrGP7xzgErSJlw=",
+			crypto.SSECSealedKey:    "EAAfAAAAAAD7v1hQq3PFRUHsItalxmrJqrOq6FwnbXNarxOOpb8jTWONPPKyM3Gfjkjyj6NCf+aB/VpHCLCTBA==",
 		},
 		shouldFail: false,
 	},
@@ -352,14 +181,14 @@ var decryptRequestTests = []struct {
 		bucket: "bucket",
 		object: "object",
 		header: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=",
-			SSECustomerKeyMD5:    "7PpPLAK26ONlVUGOWlusfg==",
+			crypto.SSECAlgorithm: "AES256",
+			crypto.SSECKey:       "MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=",
+			crypto.SSECKeyMD5:    "7PpPLAK26ONlVUGOWlusfg==",
 		},
 		metadata: map[string]string{
-			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareV2HmacSha256,
-			ServerSideEncryptionIV:            "qEqmsONcorqlcZXJxaw32H04eyXyXwUgjHzlhkaIYrU=",
-			ServerSideEncryptionSealedKey:     "IAAfAIM14ugTGcM/dIrn4iQMrkl1sjKyeBQ8FBEvRebYj8vWvxG+0cJRpC6NXRU1wJN50JaUOATjO7kz0wZ2mA==",
+			crypto.SSESealAlgorithm: SSESealAlgorithmDareV2HmacSha256,
+			crypto.SSEIV:            "qEqmsONcorqlcZXJxaw32H04eyXyXwUgjHzlhkaIYrU=",
+			crypto.SSECSealedKey:    "IAAfAIM14ugTGcM/dIrn4iQMrkl1sjKyeBQ8FBEvRebYj8vWvxG+0cJRpC6NXRU1wJN50JaUOATjO7kz0wZ2mA==",
 		},
 		shouldFail: false,
 	},
@@ -367,14 +196,14 @@ var decryptRequestTests = []struct {
 		bucket: "bucket",
 		object: "object",
 		header: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
-			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+			crypto.SSECAlgorithm: "AES256",
+			crypto.SSECKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			crypto.SSECKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
 		},
 		metadata: map[string]string{
-			ServerSideEncryptionSealAlgorithm: "HMAC-SHA3",
-			ServerSideEncryptionIV:            "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
-			ServerSideEncryptionSealedKey:     "SY5E9AvI2tI7/nUrUAssIGE32Hcs4rR9z/CUuPqu5N4=",
+			crypto.SSESealAlgorithm: "HMAC-SHA3",
+			crypto.SSEIV:            "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			crypto.SSECSealedKey:    "SY5E9AvI2tI7/nUrUAssIGE32Hcs4rR9z/CUuPqu5N4=",
 		},
 		shouldFail: true,
 	},
@@ -382,14 +211,14 @@ var decryptRequestTests = []struct {
 		bucket: "bucket",
 		object: "object",
 		header: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
-			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+			crypto.SSECAlgorithm: "AES256",
+			crypto.SSECKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			crypto.SSECKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
 		},
 		metadata: map[string]string{
-			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256,
-			ServerSideEncryptionIV:            "RrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
-			ServerSideEncryptionSealedKey:     "SY5E9AvI2tI7/nUrUAssIGE32Hcs4rR9z/CUuPqu5N4=",
+			crypto.SSESealAlgorithm: SSESealAlgorithmDareSha256,
+			crypto.SSEIV:            "RrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			crypto.SSECSealedKey:    "SY5E9AvI2tI7/nUrUAssIGE32Hcs4rR9z/CUuPqu5N4=",
 		},
 		shouldFail: true,
 	},
@@ -397,14 +226,14 @@ var decryptRequestTests = []struct {
 		bucket: "bucket",
 		object: "object",
 		header: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
-			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+			crypto.SSECAlgorithm: "AES256",
+			crypto.SSECKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			crypto.SSECKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
 		},
 		metadata: map[string]string{
-			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256,
-			ServerSideEncryptionIV:            "XAm0dRrJsEsyPb1UuFNezv1bl9ehxuYsgUVC/MUctE2k=",
-			ServerSideEncryptionSealedKey:     "SY5E9AvI2tI7/nUrUAssIGE32Hds4rR9z/CUuPqu5N4=",
+			crypto.SSESealAlgorithm: SSESealAlgorithmDareSha256,
+			crypto.SSEIV:            "XAm0dRrJsEsyPb1UuFNezv1bl9ehxuYsgUVC/MUctE2k=",
+			crypto.SSECSealedKey:    "SY5E9AvI2tI7/nUrUAssIGE32Hds4rR9z/CUuPqu5N4=",
 		},
 		shouldFail: true,
 	},
@@ -412,14 +241,14 @@ var decryptRequestTests = []struct {
 		bucket: "bucket",
 		object: "object-2",
 		header: map[string]string{
-			SSECustomerAlgorithm: "AES256",
-			SSECustomerKey:       "MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=",
-			SSECustomerKeyMD5:    "7PpPLAK26ONlVUGOWlusfg==",
+			crypto.SSECAlgorithm: "AES256",
+			crypto.SSECKey:       "MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=",
+			crypto.SSECKeyMD5:    "7PpPLAK26ONlVUGOWlusfg==",
 		},
 		metadata: map[string]string{
-			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareV2HmacSha256,
-			ServerSideEncryptionIV:            "qEqmsONcorqlcZXJxaw32H04eyXyXwUgjHzlhkaIYrU=",
-			ServerSideEncryptionSealedKey:     "IAAfAIM14ugTGcM/dIrn4iQMrkl1sjKyeBQ8FBEvRebYj8vWvxG+0cJRpC6NXRU1wJN50JaUOATjO7kz0wZ2mA==",
+			crypto.SSESealAlgorithm: SSESealAlgorithmDareV2HmacSha256,
+			crypto.SSEIV:            "qEqmsONcorqlcZXJxaw32H04eyXyXwUgjHzlhkaIYrU=",
+			crypto.SSECSealedKey:    "IAAfAIM14ugTGcM/dIrn4iQMrkl1sjKyeBQ8FBEvRebYj8vWvxG+0cJRpC6NXRU1wJN50JaUOATjO7kz0wZ2mA==",
 		},
 		shouldFail: true,
 	},
@@ -441,16 +270,16 @@ func TestDecryptRequest(t *testing.T) {
 		if err == nil && test.shouldFail {
 			t.Fatalf("Test %d: should fail but passed", i)
 		}
-		if key, ok := test.metadata[SSECustomerKey]; ok {
+		if key, ok := test.metadata[crypto.SSECKey]; ok {
 			t.Errorf("Test %d: Client provided key survived in metadata - key: %s", i, key)
 		}
-		if kdf, ok := test.metadata[ServerSideEncryptionSealAlgorithm]; ok && !test.shouldFail {
+		if kdf, ok := test.metadata[crypto.SSESealAlgorithm]; ok && !test.shouldFail {
 			t.Errorf("Test %d: ServerSideEncryptionKDF should not be part of metadata: %v", i, kdf)
 		}
-		if iv, ok := test.metadata[ServerSideEncryptionIV]; ok && !test.shouldFail {
-			t.Errorf("Test %d: ServerSideEncryptionIV should not be part of metadata: %v", i, iv)
+		if iv, ok := test.metadata[crypto.SSEIV]; ok && !test.shouldFail {
+			t.Errorf("Test %d: crypto.SSEIV should not be part of metadata: %v", i, iv)
 		}
-		if mac, ok := test.metadata[ServerSideEncryptionSealedKey]; ok && !test.shouldFail {
+		if mac, ok := test.metadata[crypto.SSECSealedKey]; ok && !test.shouldFail {
 			t.Errorf("Test %d: ServerSideEncryptionKeyMAC should not be part of metadata: %v", i, mac)
 		}
 	}
@@ -459,48 +288,390 @@ func TestDecryptRequest(t *testing.T) {
 var decryptObjectInfoTests = []struct {
 	info    ObjectInfo
 	headers http.Header
-	expErr  APIErrorCode
+	expErr  error
 }{
 	{
 		info:    ObjectInfo{Size: 100},
 		headers: http.Header{},
-		expErr:  ErrNone,
+		expErr:  nil,
 	},
 	{
-		info:    ObjectInfo{Size: 100, UserDefined: map[string]string{ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256}},
-		headers: http.Header{SSECustomerAlgorithm: []string{SSECustomerAlgorithmAES256}},
-		expErr:  ErrNone,
+		info:    ObjectInfo{Size: 100, UserDefined: map[string]string{crypto.SSESealAlgorithm: SSESealAlgorithmDareSha256}},
+		headers: http.Header{crypto.SSECAlgorithm: []string{crypto.SSEAlgorithmAES256}},
+		expErr:  nil,
 	},
 	{
-		info:    ObjectInfo{Size: 0, UserDefined: map[string]string{ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256}},
-		headers: http.Header{SSECustomerAlgorithm: []string{SSECustomerAlgorithmAES256}},
-		expErr:  ErrNone,
+		info:    ObjectInfo{Size: 0, UserDefined: map[string]string{crypto.SSESealAlgorithm: SSESealAlgorithmDareSha256}},
+		headers: http.Header{crypto.SSECAlgorithm: []string{crypto.SSEAlgorithmAES256}},
+		expErr:  nil,
 	},
 	{
-		info:    ObjectInfo{Size: 100, UserDefined: map[string]string{ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256}},
+		info:    ObjectInfo{Size: 100, UserDefined: map[string]string{crypto.SSECSealedKey: "EAAfAAAAAAD7v1hQq3PFRUHsItalxmrJqrOq6FwnbXNarxOOpb8jTWONPPKyM3Gfjkjyj6NCf+aB/VpHCLCTBA=="}},
 		headers: http.Header{},
-		expErr:  ErrSSEEncryptedObject,
+		expErr:  errEncryptedObject,
 	},
 	{
 		info:    ObjectInfo{Size: 100, UserDefined: map[string]string{}},
-		headers: http.Header{SSECustomerAlgorithm: []string{SSECustomerAlgorithmAES256}},
-		expErr:  ErrInvalidEncryptionParameters,
+		headers: http.Header{crypto.SSECAlgorithm: []string{crypto.SSEAlgorithmAES256}},
+		expErr:  errInvalidEncryptionParameters,
 	},
 	{
-		info:    ObjectInfo{Size: 31, UserDefined: map[string]string{ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256}},
-		headers: http.Header{SSECustomerAlgorithm: []string{SSECustomerAlgorithmAES256}},
-		expErr:  ErrObjectTampered,
+		info:    ObjectInfo{Size: 31, UserDefined: map[string]string{crypto.SSESealAlgorithm: SSESealAlgorithmDareSha256}},
+		headers: http.Header{crypto.SSECAlgorithm: []string{crypto.SSEAlgorithmAES256}},
+		expErr:  errObjectTampered,
 	},
 }
 
 func TestDecryptObjectInfo(t *testing.T) {
 	for i, test := range decryptObjectInfoTests {
-		if err, encrypted := DecryptObjectInfo(&test.info, test.headers); err != test.expErr {
+		if encrypted, err := DecryptObjectInfo(&test.info, test.headers); err != test.expErr {
 			t.Errorf("Test %d: Decryption returned wrong error code: got %d , want %d", i, err, test.expErr)
-		} else if enc := test.info.IsEncrypted(); encrypted && enc != encrypted {
+		} else if enc := crypto.IsEncrypted(test.info.UserDefined); encrypted && enc != encrypted {
 			t.Errorf("Test %d: Decryption thinks object is encrypted but it is not", i)
 		} else if !encrypted && enc != encrypted {
 			t.Errorf("Test %d: Decryption thinks object is not encrypted but it is", i)
 		}
 	}
 }
+
+// Tests for issue reproduced when getting the right encrypted
+// offset of the object.
+func TestGetDecryptedRange_Issue50(t *testing.T) {
+	rs, err := parseRequestRangeSpec("bytes=594870256-594870263")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	objInfo := ObjectInfo{
+		Bucket: "bucket",
+		Name:   "object",
+		Size:   595160760,
+		UserDefined: map[string]string{
+			crypto.SSEMultipart:                    "",
+			crypto.SSEIV:                           "HTexa=",
+			crypto.SSESealAlgorithm:                "DAREv2-HMAC-SHA256",
+			crypto.SSECSealedKey:                   "IAA8PGAA==",
+			ReservedMetadataPrefix + "actual-size": "594870264",
+			"content-type":                         "application/octet-stream",
+			"etag":                                 "166b1545b4c1535294ee0686678bea8c-2",
+		},
+		Parts: []objectPartInfo{
+			{
+				Number:     1,
+				Name:       "part.1",
+				ETag:       "etag1",
+				Size:       297580380,
+				ActualSize: 297435132,
+			},
+			{
+				Number:     2,
+				Name:       "part.2",
+				ETag:       "etag2",
+				Size:       297580380,
+				ActualSize: 297435132,
+			},
+		},
+	}
+
+	encOff, encLength, skipLen, seqNumber, partStart, err := objInfo.GetDecryptedRange(rs)
+	if err != nil {
+		t.Fatalf("Test: failed %s", err)
+	}
+	if encOff != 595127964 {
+		t.Fatalf("Test: expected %d, got %d", 595127964, encOff)
+	}
+	if encLength != 32796 {
+		t.Fatalf("Test: expected %d, got %d", 32796, encLength)
+	}
+	if skipLen != 32756 {
+		t.Fatalf("Test: expected %d, got %d", 32756, skipLen)
+	}
+	if seqNumber != 4538 {
+		t.Fatalf("Test: expected %d, got %d", 4538, seqNumber)
+	}
+	if partStart != 1 {
+		t.Fatalf("Test: expected %d, got %d", 1, partStart)
+	}
+}
+
+func TestGetDecryptedRange(t *testing.T) {
+	var (
+		pkgSz     = int64(64) * humanize.KiByte
+		minPartSz = int64(5) * humanize.MiByte
+		maxPartSz = int64(5) * humanize.GiByte
+
+		getEncSize = func(s int64) int64 {
+			v, _ := sio.EncryptedSize(uint64(s))
+			return int64(v)
+		}
+		udMap = func(isMulti bool) map[string]string {
+			m := map[string]string{
+				crypto.SSESealAlgorithm: SSESealAlgorithmDareSha256,
+				crypto.SSEMultipart:     "1",
+			}
+			if !isMulti {
+				delete(m, crypto.SSEMultipart)
+			}
+			return m
+		}
+	)
+
+	// Single part object tests
+	var (
+		mkSPObj = func(s int64) ObjectInfo {
+			return ObjectInfo{
+				Size:        getEncSize(s),
+				UserDefined: udMap(false),
+			}
+		}
+	)
+
+	testSP := []struct {
+		decSz int64
+		oi    ObjectInfo
+	}{
+		{0, mkSPObj(0)},
+		{1, mkSPObj(1)},
+		{pkgSz - 1, mkSPObj(pkgSz - 1)},
+		{pkgSz, mkSPObj(pkgSz)},
+		{2*pkgSz - 1, mkSPObj(2*pkgSz - 1)},
+		{minPartSz, mkSPObj(minPartSz)},
+		{maxPartSz, mkSPObj(maxPartSz)},
+	}
+
+	for i, test := range testSP {
+		{
+			// nil range
+			o, l, skip, sn, ps, err := test.oi.GetDecryptedRange(nil)
+			if err != nil {
+				t.Errorf("Case %d: unexpected err: %v", i, err)
+			}
+			if skip != 0 || sn != 0 || ps != 0 || o != 0 || l != getEncSize(test.decSz) {
+				t.Errorf("Case %d: test failed: %d %d %d %d %d", i, o, l, skip, sn, ps)
+			}
+		}
+
+		if test.decSz >= 10 {
+			// first 10 bytes
+			o, l, skip, sn, ps, err := test.oi.GetDecryptedRange(&HTTPRangeSpec{false, 0, 9})
+			if err != nil {
+				t.Errorf("Case %d: unexpected err: %v", i, err)
+			}
+			var rLen = pkgSz + 32
+			if test.decSz < pkgSz {
+				rLen = test.decSz + 32
+			}
+			if skip != 0 || sn != 0 || ps != 0 || o != 0 || l != rLen {
+				t.Errorf("Case %d: test failed: %d %d %d %d %d", i, o, l, skip, sn, ps)
+			}
+		}
+
+		kb32 := int64(32) * humanize.KiByte
+		if test.decSz >= (64+32)*humanize.KiByte {
+			// Skip the first 32Kib, and read the next 64Kib
+			o, l, skip, sn, ps, err := test.oi.GetDecryptedRange(&HTTPRangeSpec{false, kb32, 3*kb32 - 1})
+			if err != nil {
+				t.Errorf("Case %d: unexpected err: %v", i, err)
+			}
+			var rLen = (pkgSz + 32) * 2
+			if test.decSz < 2*pkgSz {
+				rLen = (pkgSz + 32) + (test.decSz - pkgSz + 32)
+			}
+			if skip != kb32 || sn != 0 || ps != 0 || o != 0 || l != rLen {
+				t.Errorf("Case %d: test failed: %d %d %d %d %d", i, o, l, skip, sn, ps)
+			}
+		}
+
+		if test.decSz >= (64*2+32)*humanize.KiByte {
+			// Skip the first 96Kib and read the next 64Kib
+			o, l, skip, sn, ps, err := test.oi.GetDecryptedRange(&HTTPRangeSpec{false, 3 * kb32, 5*kb32 - 1})
+			if err != nil {
+				t.Errorf("Case %d: unexpected err: %v", i, err)
+			}
+			var rLen = (pkgSz + 32) * 2
+			if test.decSz-pkgSz < 2*pkgSz {
+				rLen = (pkgSz + 32) + (test.decSz - pkgSz + 32*2)
+			}
+			if skip != kb32 || sn != 1 || ps != 0 || o != pkgSz+32 || l != rLen {
+				t.Errorf("Case %d: test failed: %d %d %d %d %d", i, o, l, skip, sn, ps)
+			}
+		}
+
+	}
+
+	// Multipart object tests
+	var (
+		// make a multipart object-info given part sizes
+		mkMPObj = func(sizes []int64) ObjectInfo {
+			r := make([]objectPartInfo, len(sizes))
+			sum := int64(0)
+			for i, s := range sizes {
+				r[i].Number = i
+				r[i].Size = int64(getEncSize(s))
+				sum += r[i].Size
+			}
+			return ObjectInfo{
+				Size:        sum,
+				UserDefined: udMap(true),
+				Parts:       r,
+			}
+		}
+		// Simple useful utilities
+		repeat = func(k int64, n int) []int64 {
+			a := []int64{}
+			for i := 0; i < n; i++ {
+				a = append(a, k)
+			}
+			return a
+		}
+		lsum = func(s []int64) int64 {
+			sum := int64(0)
+			for _, i := range s {
+				if i < 0 {
+					return -1
+				}
+				sum += i
+			}
+			return sum
+		}
+		esum = func(oi ObjectInfo) int64 {
+			sum := int64(0)
+			for _, i := range oi.Parts {
+				sum += i.Size
+			}
+			return sum
+		}
+	)
+
+	s1 := []int64{5487701, 5487799, 3}
+	s2 := repeat(5487701, 5)
+	s3 := repeat(maxPartSz, 10000)
+	testMPs := []struct {
+		decSizes []int64
+		oi       ObjectInfo
+	}{
+		{s1, mkMPObj(s1)},
+		{s2, mkMPObj(s2)},
+		{s3, mkMPObj(s3)},
+	}
+
+	// This function is a reference (re-)implementation of
+	// decrypted range computation, written solely for the purpose
+	// of the unit tests.
+	//
+	// `s` gives the decrypted part sizes, and the other
+	// parameters describe the desired read segment. When
+	// `isFromEnd` is true, `skipLen` argument is ignored.
+	decryptedRangeRef := func(s []int64, skipLen, readLen int64, isFromEnd bool) (o, l, skip int64, sn uint32, ps int) {
+		oSize := lsum(s)
+		if isFromEnd {
+			skipLen = oSize - readLen
+		}
+		if skipLen < 0 || readLen < 0 || oSize < 0 || skipLen+readLen > oSize {
+			t.Fatalf("Impossible read specified: %d %d %d", skipLen, readLen, oSize)
+		}
+
+		var cumulativeSum, cumulativeEncSum int64
+		toRead := readLen
+		readStart := false
+		for i, v := range s {
+			partOffset := int64(0)
+			partDarePkgOffset := int64(0)
+			if !readStart && cumulativeSum+v > skipLen {
+				// Read starts at the current part
+				readStart = true
+
+				partOffset = skipLen - cumulativeSum
+
+				// All return values except `l` are
+				// calculated here.
+				sn = uint32(partOffset / pkgSz)
+				skip = partOffset % pkgSz
+				ps = i
+				o = cumulativeEncSum + int64(sn)*(pkgSz+32)
+
+				partDarePkgOffset = partOffset - skip
+			}
+			if readStart {
+				currentPartBytes := v - partOffset
+				currentPartDareBytes := v - partDarePkgOffset
+				if currentPartBytes < toRead {
+					toRead -= currentPartBytes
+					l += getEncSize(currentPartDareBytes)
+				} else {
+					// current part has the last
+					// byte required
+					lbPartOffset := partOffset + toRead - 1
+
+					// round up the lbPartOffset
+					// to the end of the
+					// corresponding DARE package
+					lbPkgEndOffset := lbPartOffset - (lbPartOffset % pkgSz) + pkgSz
+					if lbPkgEndOffset > v {
+						lbPkgEndOffset = v
+					}
+					bytesToDrop := v - lbPkgEndOffset
+
+					// Last segment to update `l`
+					l += getEncSize(currentPartDareBytes - bytesToDrop)
+					break
+				}
+			}
+
+			cumulativeSum += v
+			cumulativeEncSum += getEncSize(v)
+		}
+		return
+	}
+
+	for i, test := range testMPs {
+		{
+			// nil range
+			o, l, skip, sn, ps, err := test.oi.GetDecryptedRange(nil)
+			if err != nil {
+				t.Errorf("Case %d: unexpected err: %v", i, err)
+			}
+			if o != 0 || l != esum(test.oi) || skip != 0 || sn != 0 || ps != 0 {
+				t.Errorf("Case %d: test failed: %d %d %d %d %d", i, o, l, skip, sn, ps)
+			}
+		}
+
+		// Skip 1Mib and read 1Mib (in the decrypted object)
+		//
+		// The check below ensures the object is large enough
+		// for the read.
+		if lsum(test.decSizes) >= 2*humanize.MiByte {
+			skipLen, readLen := int64(1)*humanize.MiByte, int64(1)*humanize.MiByte
+			o, l, skip, sn, ps, err := test.oi.GetDecryptedRange(&HTTPRangeSpec{false, skipLen, skipLen + readLen - 1})
+			if err != nil {
+				t.Errorf("Case %d: unexpected err: %v", i, err)
+			}
+
+			oRef, lRef, skipRef, snRef, psRef := decryptedRangeRef(test.decSizes, skipLen, readLen, false)
+			if o != oRef || l != lRef || skip != skipRef || sn != snRef || ps != psRef {
+				t.Errorf("Case %d: test failed: %d %d %d %d %d (Ref: %d %d %d %d %d)",
+					i, o, l, skip, sn, ps, oRef, lRef, skipRef, snRef, psRef)
+			}
+		}
+
+		// Read the last 6Mib+1 bytes of the (decrypted)
+		// object
+		//
+		// The check below ensures the object is large enough
+		// for the read.
+		readLen := int64(6)*humanize.MiByte + 1
+		if lsum(test.decSizes) >= readLen {
+			o, l, skip, sn, ps, err := test.oi.GetDecryptedRange(&HTTPRangeSpec{true, -readLen, -1})
+			if err != nil {
+				t.Errorf("Case %d: unexpected err: %v", i, err)
+			}
+
+			oRef, lRef, skipRef, snRef, psRef := decryptedRangeRef(test.decSizes, 0, readLen, true)
+			if o != oRef || l != lRef || skip != skipRef || sn != snRef || ps != psRef {
+				t.Errorf("Case %d: test failed: %d %d %d %d %d (Ref: %d %d %d %d %d)",
+					i, o, l, skip, sn, ps, oRef, lRef, skipRef, snRef, psRef)
+			}
+		}
+
+	}
+}

cmd/endpoint-ellipses.go

@@ -18,6 +18,8 @@ package cmd
 
 import (
 	"fmt"
+	"os"
+	"strconv"
 	"strings"
 
 	"github.com/minio/minio-go/pkg/set"
@@ -69,10 +71,26 @@ func getSetIndexes(args []string, totalSizes []uint64) (setIndexes [][]uint64, e
 		return nil, errInvalidArgument
 	}
 
+	// isValidSetSize - checks whether given count is a valid set size for erasure coding.
+	isValidSetSize := func(count uint64) bool {
+		return (count >= setSizes[0] && count <= setSizes[len(setSizes)-1] && count%2 == 0)
+	}
+
+	var customSetDriveCount uint64
+	if v := os.Getenv("MINIO_ERASURE_SET_DRIVE_COUNT"); v != "" {
+		customSetDriveCount, err = strconv.ParseUint(v, 10, 64)
+		if err != nil {
+			return nil, uiErrInvalidErasureSetSize(err)
+		}
+		if !isValidSetSize(customSetDriveCount) {
+			return nil, uiErrInvalidErasureSetSize(nil)
+		}
+	}
+
 	setIndexes = make([][]uint64, len(totalSizes))
 	for _, totalSize := range totalSizes {
 		// Check if totalSize has minimum range upto setSize
-		if totalSize < setSizes[0] {
+		if totalSize < setSizes[0] || totalSize < customSetDriveCount {
 			return nil, uiErrInvalidNumberOfErasureEndpoints(nil)
 		}
 	}
@@ -95,9 +113,24 @@ func getSetIndexes(args []string, totalSizes []uint64) (setIndexes [][]uint64, e
 		setSize = commonSize
 	}
 
-	// isValidSetSize - checks whether given count is a valid set size for erasure coding.
-	isValidSetSize := func(count uint64) bool {
-		return (count >= setSizes[0] && count <= setSizes[len(setSizes)-1] && count%2 == 0)
+	possibleSetCounts := func(setSize uint64) (ss []uint64) {
+		for _, s := range setSizes {
+			if setSize%s == 0 {
+				ss = append(ss, s)
+			}
+		}
+		return ss
+	}
+
+	if customSetDriveCount > 0 {
+		msg := fmt.Sprintf("Invalid set drive count, leads to non-uniform distribution for the given number of disks. Possible values for custom set count are %d", possibleSetCounts(setSize))
+		if customSetDriveCount > setSize {
+			return nil, uiErrInvalidErasureSetSize(nil).Msg(msg)
+		}
+		if setSize%customSetDriveCount != 0 {
+			return nil, uiErrInvalidErasureSetSize(nil).Msg(msg)
+		}
+		setSize = customSetDriveCount
 	}
 
 	// Check whether setSize is with the supported range.

cmd/endpoint-ellipses_test.go

@@ -18,6 +18,7 @@ package cmd
 
 import (
 	"fmt"
+	"os"
 	"reflect"
 	"testing"
 
@@ -84,6 +85,65 @@ func TestGetDivisibleSize(t *testing.T) {
 	}
 }
 
+// Test tests calculating set indexes with ENV override for drive count.
+func TestGetSetIndexesEnvOverride(t *testing.T) {
+	testCases := []struct {
+		args        []string
+		totalSizes  []uint64
+		indexes     [][]uint64
+		envOverride string
+		success     bool
+	}{
+		{
+			[]string{"data{1...64}"},
+			[]uint64{64},
+			[][]uint64{{8, 8, 8, 8, 8, 8, 8, 8}},
+			"8",
+			true,
+		},
+		{
+			[]string{"data{1...60}"},
+			nil,
+			nil,
+			"8",
+			false,
+		},
+		{
+			[]string{"data{1...64}"},
+			nil,
+			nil,
+			"-1",
+			false,
+		},
+		{
+			[]string{"data{1...64}"},
+			nil,
+			nil,
+			"2",
+			false,
+		},
+	}
+
+	for i, testCase := range testCases {
+		t.Run(fmt.Sprintf("Test%d", i+1), func(t *testing.T) {
+			if err := os.Setenv("MINIO_ERASURE_SET_DRIVE_COUNT", testCase.envOverride); err != nil {
+				t.Fatal(err)
+			}
+			gotIndexes, err := getSetIndexes(testCase.args, testCase.totalSizes)
+			if err != nil && testCase.success {
+				t.Errorf("Expected success but failed instead %s", err)
+			}
+			if err == nil && !testCase.success {
+				t.Errorf("Expected failure but passed instead")
+			}
+			if !reflect.DeepEqual(testCase.indexes, gotIndexes) {
+				t.Errorf("Expected %v, got %v", testCase.indexes, gotIndexes)
+			}
+			os.Unsetenv("MINIO_ERASURE_SET_DRIVE_COUNT")
+		})
+	}
+}
+
 // Test tests calculating set indexes.
 func TestGetSetIndexes(t *testing.T) {
 	testCases := []struct {
@@ -166,6 +226,17 @@ func TestGetSetIndexes(t *testing.T) {
 	}
 }
 
+func getHexSequences(start int, number int, paddinglen int) (seq []string) {
+	for i := start; i <= number; i++ {
+		if paddinglen == 0 {
+			seq = append(seq, fmt.Sprintf("%x", i))
+		} else {
+			seq = append(seq, fmt.Sprintf(fmt.Sprintf("%%0%dx", paddinglen), i))
+		}
+	}
+	return seq
+}
+
 func getSequences(start int, number int, paddinglen int) (seq []string) {
 	for i := start; i <= number; i++ {
 		if paddinglen == 0 {
@@ -227,9 +298,9 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"/export/set",
-							"",
-							getSequences(1, 64, 0),
+							Prefix: "/export/set",
+							Suffix: "",
+							Seq:    getSequences(1, 64, 0),
 						},
 					},
 				},
@@ -245,14 +316,14 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"",
-							"",
-							getSequences(1, 64, 0),
+							Prefix: "",
+							Suffix: "",
+							Seq:    getSequences(1, 64, 0),
 						},
 						{
-							"http://minio",
-							"/export/set",
-							getSequences(2, 3, 0),
+							Prefix: "http://minio",
+							Suffix: "/export/set",
+							Seq:    getSequences(2, 3, 0),
 						},
 					},
 				},
@@ -268,9 +339,9 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"http://minio",
-							".mydomain.net/data",
-							getSequences(1, 64, 0),
+							Prefix: "http://minio",
+							Suffix: ".mydomain.net/data",
+							Seq:    getSequences(1, 64, 0),
 						},
 					},
 				},
@@ -285,14 +356,14 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"",
-							"/data",
-							getSequences(1, 16, 0),
+							Prefix: "",
+							Suffix: "/data",
+							Seq:    getSequences(1, 16, 0),
 						},
 						{
-							"http://rack",
-							".mydomain.minio",
-							getSequences(1, 4, 0),
+							Prefix: "http://rack",
+							Suffix: ".mydomain.minio",
+							Seq:    getSequences(1, 4, 0),
 						},
 					},
 				},
@@ -308,14 +379,14 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"",
-							"",
-							getSequences(0, 1, 0),
+							Prefix: "",
+							Suffix: "",
+							Seq:    getSequences(0, 1, 0),
 						},
 						{
-							"http://minio",
-							".mydomain.net/data",
-							getSequences(0, 15, 0),
+							Prefix: "http://minio",
+							Suffix: ".mydomain.net/data",
+							Seq:    getSequences(0, 15, 0),
 						},
 					},
 				},
@@ -331,9 +402,9 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"http://server1/data",
-							"",
-							getSequences(1, 32, 0),
+							Prefix: "http://server1/data",
+							Suffix: "",
+							Seq:    getSequences(1, 32, 0),
 						},
 					},
 				},
@@ -349,9 +420,9 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"http://server1/data",
-							"",
-							getSequences(1, 32, 2),
+							Prefix: "http://server1/data",
+							Suffix: "",
+							Seq:    getSequences(1, 32, 2),
 						},
 					},
 				},
@@ -367,19 +438,19 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"",
-							"",
-							getSequences(1, 2, 0),
+							Prefix: "",
+							Suffix: "",
+							Seq:    getSequences(1, 2, 0),
 						},
 						{
-							"",
-							"/test",
-							getSequences(1, 64, 0),
+							Prefix: "",
+							Suffix: "/test",
+							Seq:    getSequences(1, 64, 0),
 						},
 						{
-							"http://minio",
-							"/export/set",
-							getSequences(2, 3, 0),
+							Prefix: "http://minio",
+							Suffix: "/export/set",
+							Seq:    getSequences(2, 3, 0),
 						},
 					},
 				},
@@ -396,14 +467,60 @@ func TestParseEndpointSet(t *testing.T) {
 				[]ellipses.ArgPattern{
 					[]ellipses.Pattern{
 						{
-							"",
-							"",
-							getSequences(1, 10, 0),
+							Prefix: "",
+							Suffix: "",
+							Seq:    getSequences(1, 10, 0),
 						},
 						{
-							"/export",
-							"/disk",
-							getSequences(1, 10, 0),
+							Prefix: "/export",
+							Suffix: "/disk",
+							Seq:    getSequences(1, 10, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{10, 10, 10, 10, 10, 10, 10, 10, 10, 10}},
+			},
+			true,
+		},
+		// IPv6 ellipses with hexadecimal expansion
+		{
+			"http://[2001:3984:3989::{1...a}]/disk{1...10}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							Prefix: "",
+							Suffix: "",
+							Seq:    getSequences(1, 10, 0),
+						},
+						{
+							Prefix: "http://[2001:3984:3989::",
+							Suffix: "]/disk",
+							Seq:    getHexSequences(1, 10, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{10, 10, 10, 10, 10, 10, 10, 10, 10, 10}},
+			},
+			true,
+		},
+		// IPv6 ellipses with hexadecimal expansion with 3 position numerics.
+		{
+			"http://[2001:3984:3989::{001...00a}]/disk{1...10}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							Prefix: "",
+							Suffix: "",
+							Seq:    getSequences(1, 10, 0),
+						},
+						{
+							Prefix: "http://[2001:3984:3989::",
+							Suffix: "]/disk",
+							Seq:    getHexSequences(1, 10, 3),
 						},
 					},
 				},

cmd/endpoint.go

@@ -112,6 +112,9 @@ func NewEndpoint(arg string) (ep Endpoint, e error) {
 				return ep, fmt.Errorf("invalid URL endpoint format: port number must be between 1 to 65535")
 			}
 		}
+		if i := strings.Index(host, "%"); i > -1 {
+			host = host[:i]
+		}
 
 		if host == "" {
 			return ep, fmt.Errorf("invalid URL endpoint format: empty host name")
@@ -152,7 +155,7 @@ func NewEndpoint(arg string) (ep Endpoint, e error) {
 		// Only check if the arg is an ip address and ask for scheme since its absent.
 		// localhost, example.com, any FQDN cannot be disambiguated from a regular file path such as
 		// /mnt/export1. So we go ahead and start the minio server in FS modes in these cases.
-		if isHostIPv4(arg) {
+		if isHostIP(arg) {
 			return ep, fmt.Errorf("invalid URL endpoint format: missing scheme http or https")
 		}
 		u = &url.URL{Path: path.Clean(arg)}
@@ -168,6 +171,18 @@ func NewEndpoint(arg string) (ep Endpoint, e error) {
 // EndpointList - list of same type of endpoint.
 type EndpointList []Endpoint
 
+// Nodes - returns number of unique servers.
+func (endpoints EndpointList) Nodes() int {
+	uniqueNodes := set.NewStringSet()
+	for _, endpoint := range endpoints {
+		if uniqueNodes.Contains(endpoint.Host) {
+			continue
+		}
+		uniqueNodes.Add(endpoint.Host)
+	}
+	return len(uniqueNodes)
+}
+
 // IsHTTPS - returns true if secure for URLEndpointType.
 func (endpoints EndpointList) IsHTTPS() bool {
 	return endpoints[0].IsHTTPS()
@@ -212,7 +227,6 @@ func NewEndpointList(args ...string) (endpoints EndpointList, err error) {
 		uniqueArgs.Add(arg)
 		endpoints = append(endpoints, endpoint)
 	}
-
 	return endpoints, nil
 }
 
@@ -329,7 +343,7 @@ func CreateEndpoints(serverAddr string, args ...[]string) (string, EndpointList,
 			if err != nil {
 				host = endpoint.Host
 			}
-			hostIPSet, _ := getHostIP4(host)
+			hostIPSet, _ := getHostIP(host)
 			if IPSet, ok := pathIPMap[endpoint.Path]; ok {
 				if !IPSet.Intersection(hostIPSet).IsEmpty() {
 					return serverAddr, endpoints, setupType,
@@ -399,12 +413,12 @@ func CreateEndpoints(serverAddr string, args ...[]string) (string, EndpointList,
 				host = localServerAddr
 			}
 
-			ipList, err := getHostIP4(host)
+			ipList, err := getHostIP(host)
 			logger.FatalIf(err, "unexpected error when resolving host '%s'", host)
 
-			// Filter ipList by IPs those start with '127.'.
+			// Filter ipList by IPs those start with '127.' or '::1'
 			loopBackIPs := ipList.FuncMatch(func(ip string, matchString string) bool {
-				return strings.HasPrefix(ip, "127.")
+				return strings.HasPrefix(ip, "127.") || strings.HasPrefix(ip, "::1")
 			}, "")
 
 			// If loop back IP is found and ipList contains only loop back IPs, then error out.
@@ -443,7 +457,12 @@ func CreateEndpoints(serverAddr string, args ...[]string) (string, EndpointList,
 		return serverAddr, endpoints, setupType, err
 	}
 
-	updateDomainIPs(uniqueArgs)
+	_, dok := os.LookupEnv("MINIO_DOMAIN")
+	_, eok := os.LookupEnv("MINIO_ETCD_ENDPOINTS")
+	_, iok := os.LookupEnv("MINIO_PUBLIC_IPS")
+	if dok && eok && !iok {
+		updateDomainIPs(uniqueArgs)
+	}
 
 	setupType = DistXLSetupType
 	return serverAddr, endpoints, setupType, nil
@@ -468,10 +487,10 @@ func GetLocalPeer(endpoints EndpointList) (localPeer string) {
 		// Local peer can be empty in FS or Erasure coded mode.
 		// If so, return globalMinioHost + globalMinioPort value.
 		if globalMinioHost != "" {
-			return globalMinioHost + ":" + globalMinioPort
+			return net.JoinHostPort(globalMinioHost, globalMinioPort)
 		}
 
-		return "127.0.0.1:" + globalMinioPort
+		return net.JoinHostPort("127.0.0.1", globalMinioPort)
 	}
 	return peerSet.ToSlice()[0]
 }
@@ -497,21 +516,21 @@ func GetRemotePeers(endpoints EndpointList) []string {
 	return peerSet.ToSlice()
 }
 
-// In federated and distributed setup, update IP addresses of the hosts passed in command line
-// if MINIO_PUBLIC_IPS are not set manually
 func updateDomainIPs(endPoints set.StringSet) {
-	_, dok := os.LookupEnv("MINIO_DOMAIN")
-	_, eok := os.LookupEnv("MINIO_ETCD_ENDPOINTS")
-	_, iok := os.LookupEnv("MINIO_PUBLIC_IPS")
-	if dok && eok && !iok {
-		globalDomainIPs = set.NewStringSet()
-		for e := range endPoints {
-			host, _, _ := net.SplitHostPort(e)
-			ipList, _ := getHostIP4(host)
-			remoteIPList := ipList.FuncMatch(func(ip string, matchString string) bool {
-				return !strings.HasPrefix(ip, "127.")
-			}, "")
-			globalDomainIPs.Add(remoteIPList.ToSlice()[0])
+	ipList := set.NewStringSet()
+	for e := range endPoints {
+		host, _, err := net.SplitHostPort(e)
+		if err != nil {
+			if strings.Contains(err.Error(), "missing port in address") {
+				host = e
+			} else {
+				continue
+			}
 		}
+		IPs, _ := getHostIP(host)
+		ipList = ipList.Union(IPs)
 	}
+	globalDomainIPs = ipList.FuncMatch(func(ip string, matchString string) bool {
+		return !strings.HasPrefix(ip, "127.") || strings.HasPrefix(ip, "::1")
+	}, "")
 }

cmd/endpoint_test.go

@@ -304,27 +304,27 @@ func TestCreateEndpoints(t *testing.T) {
 		}, DistXLSetupType, nil},
 	}
 
-	for _, testCase := range testCases {
+	for i, testCase := range testCases {
 		serverAddr, endpoints, setupType, err := CreateEndpoints(testCase.serverAddr, testCase.args...)
 
 		if err == nil {
 			if testCase.expectedErr != nil {
-				t.Fatalf("error: expected = %v, got = <nil>", testCase.expectedErr)
+				t.Fatalf("Test (%d) error: expected = %v, got = <nil>", i+1, testCase.expectedErr)
 			} else {
 				if serverAddr != testCase.expectedServerAddr {
-					t.Fatalf("serverAddr: expected = %v, got = %v", testCase.expectedServerAddr, serverAddr)
+					t.Fatalf("Test (%d) serverAddr: expected = %v, got = %v", i+1, testCase.expectedServerAddr, serverAddr)
 				}
 				if !reflect.DeepEqual(endpoints, testCase.expectedEndpoints) {
-					t.Fatalf("endpoints: expected = %v, got = %v", testCase.expectedEndpoints, endpoints)
+					t.Fatalf("Test (%d) endpoints: expected = %v, got = %v", i+1, testCase.expectedEndpoints, endpoints)
 				}
 				if setupType != testCase.expectedSetupType {
-					t.Fatalf("setupType: expected = %v, got = %v", testCase.expectedSetupType, setupType)
+					t.Fatalf("Test (%d) setupType: expected = %v, got = %v", i+1, testCase.expectedSetupType, setupType)
 				}
 			}
 		} else if testCase.expectedErr == nil {
-			t.Fatalf("error: expected = <nil>, got = %v", err)
+			t.Fatalf("Test (%d) error: expected = <nil>, got = %v", i+1, err)
 		} else if err.Error() != testCase.expectedErr.Error() {
-			t.Fatalf("error: expected = %v, got = %v", testCase.expectedErr, err)
+			t.Fatalf("Test (%d) error: expected = %v, got = %v", i+1, testCase.expectedErr, err)
 		}
 	}
 }

cmd/environment.go

@@ -0,0 +1,182 @@
+// Minio Cloud Storage, (C) 2016, 2017, 2018 Minio, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/minio/minio/cmd/crypto"
+)
+
+const (
+	// EnvKMSMasterKey is the environment variable used to specify
+	// a KMS master key used to protect SSE-S3 per-object keys.
+	// Valid values must be of the from: "KEY_ID:32_BYTE_HEX_VALUE".
+	EnvKMSMasterKey = "MINIO_SSE_MASTER_KEY"
+
+	// EnvAutoEncryption is the environment variable used to en/disable
+	// SSE-S3 auto-encryption. SSE-S3 auto-encryption, if enabled,
+	// requires a valid KMS configuration and turns any non-SSE-C
+	// request into an SSE-S3 request.
+	// If present EnvAutoEncryption must be either "on" or "off".
+	EnvAutoEncryption = "MINIO_SSE_AUTO_ENCRYPTION"
+)
+
+const (
+	// EnvVaultEndpoint is the environment variable used to specify
+	// the vault HTTPS endpoint.
+	EnvVaultEndpoint = "MINIO_SSE_VAULT_ENDPOINT"
+
+	// EnvVaultAuthType is the environment variable used to specify
+	// the authentication type for vault.
+	EnvVaultAuthType = "MINIO_SSE_VAULT_AUTH_TYPE"
+
+	// EnvVaultAppRoleID is the environment variable used to specify
+	// the vault AppRole ID.
+	EnvVaultAppRoleID = "MINIO_SSE_VAULT_APPROLE_ID"
+
+	// EnvVaultAppSecretID is the environment variable used to specify
+	// the vault AppRole secret corresponding to the AppRole ID.
+	EnvVaultAppSecretID = "MINIO_SSE_VAULT_APPROLE_SECRET"
+
+	// EnvVaultKeyVersion is the environment variable used to specify
+	// the vault key version.
+	EnvVaultKeyVersion = "MINIO_SSE_VAULT_KEY_VERSION"
+
+	// EnvVaultKeyName is the environment variable used to specify
+	// the vault named key-ring. In the S3 context it's referred as
+	// customer master key ID (CMK-ID).
+	EnvVaultKeyName = "MINIO_SSE_VAULT_KEY_NAME"
+
+	// EnvVaultCAPath is the environment variable used to specify the
+	// path to a directory of PEM-encoded CA cert files. These CA cert
+	// files are used to authenticate Minio to Vault over mTLS.
+	EnvVaultCAPath = "MINIO_SSE_VAULT_CAPATH"
+
+	// EnvVaultNamespace is the environment variable used to specify
+	// vault namespace. The vault namespace is used if the enterprise
+	// version of Hashicorp Vault is used.
+	EnvVaultNamespace = "MINIO_SSE_VAULT_NAMESPACE"
+)
+
+// Environment provides functions for accessing environment
+// variables.
+var Environment = environment{}
+
+type environment struct{}
+
+// Get retrieves the value of the environment variable named
+// by the key. If the variable is present in the environment the
+// value (which may be empty) is returned. Otherwise it returns
+// the specified default value.
+func (environment) Get(key, defaultValue string) string {
+	if v, ok := os.LookupEnv(key); ok {
+		return v
+	}
+	return defaultValue
+}
+
+// Lookup retrieves the value of the environment variable named
+// by the key. If the variable is present in the environment the
+// value (which may be empty) is returned and the boolean is true.
+// Otherwise the returned value will be empty and the boolean will
+// be false.
+func (environment) Lookup(key string) (string, bool) { return os.LookupEnv(key) }
+
+// LookupKMSConfig extracts the KMS configuration provided by environment
+// variables and merge them with the provided KMS configuration. The
+// merging follows the following rules:
+//
+// 1. A valid value provided as environment variable is higher prioritized
+// than the provided configuration and overwrites the value from the
+// configuration file.
+//
+// 2. A value specified as environment variable never changes the configuration
+// file. So it is never made a persistent setting.
+//
+// It sets the global KMS configuration according to the merged configuration
+// on success.
+func (env environment) LookupKMSConfig(config crypto.KMSConfig) (err error) {
+	// Lookup Hashicorp-Vault configuration & overwrite config entry if ENV var is present
+	config.Vault.Endpoint = env.Get(EnvVaultEndpoint, config.Vault.Endpoint)
+	config.Vault.CAPath = env.Get(EnvVaultCAPath, config.Vault.CAPath)
+	config.Vault.Auth.Type = env.Get(EnvVaultAuthType, config.Vault.Auth.Type)
+	config.Vault.Auth.AppRole.ID = env.Get(EnvVaultAppRoleID, config.Vault.Auth.AppRole.ID)
+	config.Vault.Auth.AppRole.Secret = env.Get(EnvVaultAppSecretID, config.Vault.Auth.AppRole.Secret)
+	config.Vault.Key.Name = env.Get(EnvVaultKeyName, config.Vault.Key.Name)
+	config.Vault.Namespace = env.Get(EnvVaultNamespace, config.Vault.Namespace)
+	keyVersion := env.Get(EnvVaultKeyVersion, strconv.Itoa(config.Vault.Key.Version))
+	config.Vault.Key.Version, err = strconv.Atoi(keyVersion)
+	if err != nil {
+		return fmt.Errorf("Invalid ENV variable: Unable to parse %s value (`%s`)", EnvVaultKeyVersion, keyVersion)
+	}
+	if err = config.Vault.Verify(); err != nil {
+		return err
+	}
+
+	// Lookup KMS master keys - only available through ENV.
+	if masterKey, ok := env.Lookup(EnvKMSMasterKey); ok {
+		if !config.Vault.IsEmpty() { // Vault and KMS master key provided
+			return errors.New("Ambiguous KMS configuration: vault configuration and a master key are provided at the same time")
+		}
+		globalKMSKeyID, globalKMS, err = parseKMSMasterKey(masterKey)
+		if err != nil {
+			return err
+		}
+	}
+	if !config.Vault.IsEmpty() {
+		globalKMS, err = crypto.NewVault(config.Vault)
+		if err != nil {
+			return err
+		}
+		globalKMSKeyID = config.Vault.Key.Name
+	}
+
+	autoEncryption, err := ParseBoolFlag(env.Get(EnvAutoEncryption, "off"))
+	if err != nil {
+		return err
+	}
+	globalAutoEncryption = bool(autoEncryption)
+	if globalAutoEncryption && globalKMS == nil { // auto-encryption enabled but no KMS
+		return errors.New("Invalid KMS configuration: auto-encryption is enabled but no valid KMS configuration is present")
+	}
+	return nil
+}
+
+// parseKMSMasterKey parses the value of the environment variable
+// `EnvKMSMasterKey` and returns a key-ID and a master-key KMS on success.
+func parseKMSMasterKey(envArg string) (string, crypto.KMS, error) {
+	values := strings.SplitN(envArg, ":", 2)
+	if len(values) != 2 {
+		return "", nil, fmt.Errorf("Invalid KMS master key: %s does not contain a ':'", envArg)
+	}
+	var (
+		keyID  = values[0]
+		hexKey = values[1]
+	)
+	if len(hexKey) != 64 { // 2 hex bytes = 1 byte
+		return "", nil, fmt.Errorf("Invalid KMS master key: %s not a 32 bytes long HEX value", hexKey)
+	}
+	var masterKey [32]byte
+	if _, err := hex.Decode(masterKey[:], []byte(hexKey)); err != nil {
+		return "", nil, fmt.Errorf("Invalid KMS master key: %s not a 32 bytes long HEX value", hexKey)
+	}
+	return keyID, crypto.NewKMS(masterKey), nil
+}

cmd/erasure-createfile.go

@@ -1,102 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import (
-	"context"
-	"hash"
-	"io"
-
-	"github.com/minio/minio/cmd/logger"
-)
-
-// CreateFile creates a new bitrot encoded file spread over all available disks. CreateFile will create
-// the file at the given volume and path. It will read from src until an io.EOF occurs. The given algorithm will
-// be used to protect the erasure encoded file.
-func (s *ErasureStorage) CreateFile(ctx context.Context, src io.Reader, volume, path string, buffer []byte, algorithm BitrotAlgorithm, writeQuorum int) (f ErasureFileInfo, err error) {
-	if !algorithm.Available() {
-		logger.LogIf(ctx, errBitrotHashAlgoInvalid)
-		return f, errBitrotHashAlgoInvalid
-	}
-	f.Checksums = make([][]byte, len(s.disks))
-	hashers := make([]hash.Hash, len(s.disks))
-	for i := range hashers {
-		hashers[i] = algorithm.New()
-	}
-	errChans, errs := make([]chan error, len(s.disks)), make([]error, len(s.disks))
-	for i := range errChans {
-		errChans[i] = make(chan error, 1) // create buffered channel to let finished go-routines die early
-	}
-
-	var blocks [][]byte
-	var n = len(buffer)
-	for n == len(buffer) {
-		n, err = io.ReadFull(src, buffer)
-		if n == 0 && err == io.EOF {
-			if f.Size != 0 { // don't write empty block if we have written to the disks
-				break
-			}
-			blocks = make([][]byte, len(s.disks)) // write empty block
-		} else if err == nil || (n > 0 && err == io.ErrUnexpectedEOF) {
-			blocks, err = s.ErasureEncode(ctx, buffer[:n])
-			if err != nil {
-				return f, err
-			}
-		} else {
-			logger.LogIf(ctx, err)
-			return f, err
-		}
-
-		for i := range errChans { // span workers
-			go erasureAppendFile(ctx, s.disks[i], volume, path, hashers[i], blocks[i], errChans[i])
-		}
-		for i := range errChans { // wait until all workers are finished
-			errs[i] = <-errChans[i]
-		}
-		if err = reduceWriteQuorumErrs(ctx, errs, objectOpIgnoredErrs, writeQuorum); err != nil {
-			return f, err
-		}
-		s.disks = evalDisks(s.disks, errs)
-		f.Size += int64(n)
-	}
-
-	f.Algorithm = algorithm
-	for i, disk := range s.disks {
-		if disk == OfflineDisk {
-			continue
-		}
-		f.Checksums[i] = hashers[i].Sum(nil)
-	}
-	return f, nil
-}
-
-// erasureAppendFile appends the content of buf to the file on the given disk and updates computes
-// the hash of the written data. It sends the write error (or nil) over the error channel.
-func erasureAppendFile(ctx context.Context, disk StorageAPI, volume, path string, hash hash.Hash, buf []byte, errChan chan<- error) {
-	if disk == OfflineDisk {
-		logger.LogIf(ctx, errDiskNotFound)
-		errChan <- errDiskNotFound
-		return
-	}
-	err := disk.AppendFile(volume, path, buf)
-	if err != nil {
-		errChan <- err
-		return
-	}
-	hash.Write(buf)
-	errChan <- err
-}

cmd/erasure-decode.go

@@ -0,0 +1,188 @@
+/*
+ * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"context"
+	"io"
+
+	"github.com/minio/minio/cmd/logger"
+)
+
+// Reads in parallel from bitrotReaders.
+type parallelReader struct {
+	readers       []*bitrotReader
+	dataBlocks    int
+	offset        int64
+	shardSize     int64
+	shardFileSize int64
+}
+
+// newParallelReader returns parallelReader.
+func newParallelReader(readers []*bitrotReader, dataBlocks int, offset int64, fileSize int64, blocksize int64) *parallelReader {
+	shardSize := ceilFrac(blocksize, int64(dataBlocks))
+	shardFileSize := getErasureShardFileSize(blocksize, fileSize, dataBlocks)
+	return &parallelReader{
+		readers,
+		dataBlocks,
+		(offset / blocksize) * shardSize,
+		shardSize,
+		shardFileSize,
+	}
+}
+
+// Returns if buf can be erasure decoded.
+func (p *parallelReader) canDecode(buf [][]byte) bool {
+	bufCount := 0
+	for _, b := range buf {
+		if b != nil {
+			bufCount++
+		}
+	}
+	return bufCount >= p.dataBlocks
+}
+
+// Read reads from bitrotReaders in parallel. Returns p.dataBlocks number of bufs.
+func (p *parallelReader) Read() ([][]byte, error) {
+	type errIdx struct {
+		idx int
+		buf []byte
+		err error
+	}
+
+	errCh := make(chan errIdx)
+	currReaderIndex := 0
+	newBuf := make([][]byte, len(p.readers))
+
+	if p.offset+p.shardSize > p.shardFileSize {
+		p.shardSize = p.shardFileSize - p.offset
+	}
+
+	read := func(currReaderIndex int) {
+		b, err := p.readers[currReaderIndex].ReadChunk(p.offset, p.shardSize)
+		errCh <- errIdx{currReaderIndex, b, err}
+	}
+
+	readerCount := 0
+	for _, r := range p.readers {
+		if r != nil {
+			readerCount++
+		}
+	}
+	if readerCount < p.dataBlocks {
+		return nil, errXLReadQuorum
+	}
+
+	readerCount = 0
+	for i, r := range p.readers {
+		if r == nil {
+			continue
+		}
+		go read(i)
+		readerCount++
+		if readerCount == p.dataBlocks {
+			currReaderIndex = i + 1
+			break
+		}
+	}
+
+	for errVal := range errCh {
+		if errVal.err == nil {
+			newBuf[errVal.idx] = errVal.buf
+			if p.canDecode(newBuf) {
+				p.offset += int64(p.shardSize)
+				return newBuf, nil
+			}
+			continue
+		}
+		p.readers[errVal.idx] = nil
+		for currReaderIndex < len(p.readers) {
+			if p.readers[currReaderIndex] != nil {
+				break
+			}
+			currReaderIndex++
+		}
+
+		if currReaderIndex == len(p.readers) {
+			break
+		}
+		go read(currReaderIndex)
+		currReaderIndex++
+	}
+
+	return nil, errXLReadQuorum
+}
+
+// Decode reads from readers, reconstructs data if needed and writes the data to the writer.
+func (e Erasure) Decode(ctx context.Context, writer io.Writer, readers []*bitrotReader, offset, length, totalLength int64) error {
+	if offset < 0 || length < 0 {
+		logger.LogIf(ctx, errInvalidArgument)
+		return errInvalidArgument
+	}
+	if offset+length > totalLength {
+		logger.LogIf(ctx, errInvalidArgument)
+		return errInvalidArgument
+	}
+	if length == 0 {
+		return nil
+	}
+
+	reader := newParallelReader(readers, e.dataBlocks, offset, totalLength, e.blockSize)
+
+	startBlock := offset / e.blockSize
+	endBlock := (offset + length) / e.blockSize
+
+	var bytesWritten int64
+	for block := startBlock; block <= endBlock; block++ {
+		var blockOffset, blockLength int64
+		switch {
+		case startBlock == endBlock:
+			blockOffset = offset % e.blockSize
+			blockLength = length
+		case block == startBlock:
+			blockOffset = offset % e.blockSize
+			blockLength = e.blockSize - blockOffset
+		case block == endBlock:
+			blockOffset = 0
+			blockLength = (offset + length) % e.blockSize
+		default:
+			blockOffset = 0
+			blockLength = e.blockSize
+		}
+		if blockLength == 0 {
+			break
+		}
+		bufs, err := reader.Read()
+		if err != nil {
+			return err
+		}
+		if err = e.DecodeDataBlocks(bufs); err != nil {
+			logger.LogIf(ctx, err)
+			return err
+		}
+		n, err := writeDataBlocks(ctx, writer, bufs, e.dataBlocks, blockOffset, blockLength)
+		if err != nil {
+			return err
+		}
+		bytesWritten += n
+	}
+	if bytesWritten != length {
+		logger.LogIf(ctx, errLessData)
+		return errLessData
+	}
+	return nil
+}

cmd/erasure-decode_test.go

@@ -19,11 +19,12 @@ package cmd
 import (
 	"bytes"
 	"context"
-	crand "crypto/rand"
 	"io"
 	"math/rand"
 	"testing"
 
+	crand "crypto/rand"
+
 	humanize "github.com/dustin/go-humanize"
 )
 
@@ -31,7 +32,7 @@ func (d badDisk) ReadFile(volume string, path string, offset int64, buf []byte,
 	return 0, errFaultyDisk
 }
 
-var erasureReadFileTests = []struct {
+var erasureDecodeTests = []struct {
 	dataBlocks                   int
 	onDisks, offDisks            int
 	blocksize, data              int64
@@ -66,50 +67,74 @@ var erasureReadFileTests = []struct {
 	{dataBlocks: 8, onDisks: 16, offDisks: 7, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, length: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                                            // 23
 	{dataBlocks: 2, onDisks: 4, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, length: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                                             // 24
 	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, length: oneMiByte, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                                             // 25
-	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, length: oneMiByte, algorithm: 0, shouldFail: true, shouldFailQuorum: false},                                                                   // 26
-	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(blockSizeV1) + 1, offset: 0, length: int64(blockSizeV1) + 1, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                               // 27
-	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 12, length: int64(blockSizeV1) + 17, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                             // 28
-	{dataBlocks: 3, onDisks: 6, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 1023, length: int64(blockSizeV1) + 1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},             // 29
-	{dataBlocks: 4, onDisks: 8, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 11, length: int64(blockSizeV1) + 2*1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},             // 30
-	{dataBlocks: 6, onDisks: 12, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 512, length: int64(blockSizeV1) + 8*1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},           // 31
-	{dataBlocks: 8, onDisks: 16, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: int64(blockSizeV1), length: int64(blockSizeV1) - 1, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 32
-	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(oneMiByte), offset: -1, length: 3, algorithm: DefaultBitrotAlgorithm, shouldFail: true, shouldFailQuorum: false},                                              // 33
-	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(oneMiByte), offset: 1024, length: -1, algorithm: DefaultBitrotAlgorithm, shouldFail: true, shouldFailQuorum: false},                                           // 34
-	{dataBlocks: 4, onDisks: 6, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(blockSizeV1), offset: 0, length: int64(blockSizeV1), algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                                       // 35
-	{dataBlocks: 4, onDisks: 6, offDisks: 1, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 12, length: int64(blockSizeV1) + 17, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                             // 36
-	{dataBlocks: 4, onDisks: 6, offDisks: 3, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 1023, length: int64(blockSizeV1) + 1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true},              // 37
-	{dataBlocks: 8, onDisks: 12, offDisks: 4, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 11, length: int64(blockSizeV1) + 2*1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},            // 38
+	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(blockSizeV1) + 1, offset: 0, length: int64(blockSizeV1) + 1, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                               // 26
+	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 12, length: int64(blockSizeV1) + 17, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                             // 27
+	{dataBlocks: 3, onDisks: 6, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 1023, length: int64(blockSizeV1) + 1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},             // 28
+	{dataBlocks: 4, onDisks: 8, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 11, length: int64(blockSizeV1) + 2*1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},             // 29
+	{dataBlocks: 6, onDisks: 12, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 512, length: int64(blockSizeV1) + 8*1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},           // 30
+	{dataBlocks: 8, onDisks: 16, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: int64(blockSizeV1), length: int64(blockSizeV1) - 1, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 31
+	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(oneMiByte), offset: -1, length: 3, algorithm: DefaultBitrotAlgorithm, shouldFail: true, shouldFailQuorum: false},                                              // 32
+	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(oneMiByte), offset: 1024, length: -1, algorithm: DefaultBitrotAlgorithm, shouldFail: true, shouldFailQuorum: false},                                           // 33
+	{dataBlocks: 4, onDisks: 6, offDisks: 0, blocksize: int64(blockSizeV1), data: int64(blockSizeV1), offset: 0, length: int64(blockSizeV1), algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                                       // 34
+	{dataBlocks: 4, onDisks: 6, offDisks: 1, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 12, length: int64(blockSizeV1) + 17, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},                             // 35
+	{dataBlocks: 4, onDisks: 6, offDisks: 3, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 1023, length: int64(blockSizeV1) + 1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true},              // 36
+	{dataBlocks: 8, onDisks: 12, offDisks: 4, blocksize: int64(blockSizeV1), data: int64(2 * blockSizeV1), offset: 11, length: int64(blockSizeV1) + 2*1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},            // 37
 }
 
-func TestErasureReadFile(t *testing.T) {
-	for i, test := range erasureReadFileTests {
+func TestErasureDecode(t *testing.T) {
+	for i, test := range erasureDecodeTests {
 		setup, err := newErasureTestSetup(test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
 		if err != nil {
 			t.Fatalf("Test %d: failed to create test setup: %v", i, err)
 		}
-		storage, err := NewErasureStorage(context.Background(), setup.disks, test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
+		erasure, err := NewErasure(context.Background(), test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
 		if err != nil {
 			setup.Remove()
 			t.Fatalf("Test %d: failed to create ErasureStorage: %v", i, err)
 		}
-
+		disks := setup.disks
 		data := make([]byte, test.data)
 		if _, err = io.ReadFull(crand.Reader, data); err != nil {
 			setup.Remove()
 			t.Fatalf("Test %d: failed to generate random test data: %v", i, err)
 		}
+
 		writeAlgorithm := test.algorithm
 		if !test.algorithm.Available() {
 			writeAlgorithm = DefaultBitrotAlgorithm
 		}
 		buffer := make([]byte, test.blocksize, 2*test.blocksize)
-		file, err := storage.CreateFile(context.Background(), bytes.NewReader(data[:]), "testbucket", "object", buffer, writeAlgorithm, test.dataBlocks+1)
+		writers := make([]*bitrotWriter, len(disks))
+		for i, disk := range disks {
+			writers[i] = newBitrotWriter(disk, "testbucket", "object", writeAlgorithm)
+		}
+		n, err := erasure.Encode(context.Background(), bytes.NewReader(data[:]), writers, buffer, erasure.dataBlocks+1)
 		if err != nil {
 			setup.Remove()
 			t.Fatalf("Test %d: failed to create erasure test file: %v", i, err)
 		}
+		if n != test.data {
+			setup.Remove()
+			t.Fatalf("Test %d: failed to create erasure test file", i)
+		}
+		for i, w := range writers {
+			if w == nil {
+				disks[i] = nil
+			}
+		}
+
+		// Get the checksums of the current part.
+		bitrotReaders := make([]*bitrotReader, len(disks))
+		for index, disk := range disks {
+			if disk == OfflineDisk {
+				continue
+			}
+			endOffset := getErasureShardFileEndOffset(test.offset, test.length, test.data, test.blocksize, erasure.dataBlocks)
+			bitrotReaders[index] = newBitrotReader(disk, "testbucket", "object", writeAlgorithm, endOffset, writers[index].Sum())
+		}
+
 		writer := bytes.NewBuffer(nil)
-		readInfo, err := storage.ReadFile(context.Background(), writer, "testbucket", "object", test.offset, test.length, test.data, file.Checksums, test.algorithm, test.blocksize)
+		err = erasure.Decode(context.Background(), writer, bitrotReaders, test.offset, test.length, test.data)
 		if err != nil && !test.shouldFail {
 			t.Errorf("Test %d: should pass but failed with: %v", i, err)
 		}
@@ -117,25 +142,32 @@ func TestErasureReadFile(t *testing.T) {
 			t.Errorf("Test %d: should fail but it passed", i)
 		}
 		if err == nil {
-			if readInfo.Size != test.length {
-				t.Errorf("Test %d: read returns wrong number of bytes: got: #%d want: #%d", i, readInfo.Size, test.length)
-			}
-			if readInfo.Algorithm != test.algorithm {
-				t.Errorf("Test %d: read returns wrong algorithm: got: %v want: %v", i, readInfo.Algorithm, test.algorithm)
-			}
 			if content := writer.Bytes(); !bytes.Equal(content, data[test.offset:test.offset+test.length]) {
 				t.Errorf("Test %d: read retruns wrong file content", i)
 			}
 		}
+		for i, r := range bitrotReaders {
+			if r == nil {
+				disks[i] = OfflineDisk
+			}
+		}
 		if err == nil && !test.shouldFail {
-			writer.Reset()
-			for j := range storage.disks[:test.offDisks] {
-				storage.disks[j] = badDisk{nil}
+			bitrotReaders = make([]*bitrotReader, len(disks))
+			for index, disk := range disks {
+				if disk == OfflineDisk {
+					continue
+				}
+				endOffset := getErasureShardFileEndOffset(test.offset, test.length, test.data, test.blocksize, erasure.dataBlocks)
+				bitrotReaders[index] = newBitrotReader(disk, "testbucket", "object", writeAlgorithm, endOffset, writers[index].Sum())
+			}
+			for j := range disks[:test.offDisks] {
+				bitrotReaders[j].disk = badDisk{nil}
 			}
 			if test.offDisks > 0 {
-				storage.disks[0] = OfflineDisk
+				bitrotReaders[0] = nil
 			}
-			readInfo, err = storage.ReadFile(context.Background(), writer, "testbucket", "object", test.offset, test.length, test.data, file.Checksums, test.algorithm, test.blocksize)
+			writer.Reset()
+			err = erasure.Decode(context.Background(), writer, bitrotReaders, test.offset, test.length, test.data)
 			if err != nil && !test.shouldFailQuorum {
 				t.Errorf("Test %d: should pass but failed with: %v", i, err)
 			}
@@ -143,12 +175,6 @@ func TestErasureReadFile(t *testing.T) {
 				t.Errorf("Test %d: should fail but it passed", i)
 			}
 			if !test.shouldFailQuorum {
-				if readInfo.Size != test.length {
-					t.Errorf("Test %d: read returns wrong number of bytes: got: #%d want: #%d", i, readInfo.Size, test.length)
-				}
-				if readInfo.Algorithm != test.algorithm {
-					t.Errorf("Test %d: read returns wrong algorithm: got: %v want: %v", i, readInfo.Algorithm, test.algorithm)
-				}
 				if content := writer.Bytes(); !bytes.Equal(content, data[test.offset:test.offset+test.length]) {
 					t.Errorf("Test %d: read retruns wrong file content", i)
 				}
@@ -158,10 +184,10 @@ func TestErasureReadFile(t *testing.T) {
 	}
 }
 
-// Test erasureReadFile with random offset and lengths.
+// Test erasureDecode with random offset and lengths.
 // This test is t.Skip()ed as it a long time to run, hence should be run
 // explicitly after commenting out t.Skip()
-func TestErasureReadFileRandomOffsetLength(t *testing.T) {
+func TestErasureDecodeRandomOffsetLength(t *testing.T) {
 	// Comment the following line to run this test.
 	t.SkipNow()
 	// Initialize environment needed for the test.
@@ -174,8 +200,8 @@ func TestErasureReadFileRandomOffsetLength(t *testing.T) {
 		return
 	}
 	defer setup.Remove()
-
-	storage, err := NewErasureStorage(context.Background(), setup.disks, dataBlocks, parityBlocks, blockSize)
+	disks := setup.disks
+	erasure, err := NewErasure(context.Background(), dataBlocks, parityBlocks, blockSize)
 	if err != nil {
 		t.Fatalf("failed to create ErasureStorage: %v", err)
 	}
@@ -187,17 +213,25 @@ func TestErasureReadFileRandomOffsetLength(t *testing.T) {
 		t.Fatal(err)
 	}
 
+	writers := make([]*bitrotWriter, len(disks))
+	for i, disk := range disks {
+		if disk == nil {
+			continue
+		}
+		writers[i] = newBitrotWriter(disk, "testbucket", "object", DefaultBitrotAlgorithm)
+	}
+
 	// 10000 iterations with random offsets and lengths.
 	iterations := 10000
 
 	// Create a test file to read from.
 	buffer := make([]byte, blockSize, 2*blockSize)
-	file, err := storage.CreateFile(context.Background(), bytes.NewReader(data), "testbucket", "testobject", buffer, DefaultBitrotAlgorithm, dataBlocks+1)
+	n, err := erasure.Encode(context.Background(), bytes.NewReader(data), writers, buffer, erasure.dataBlocks+1)
 	if err != nil {
 		t.Fatal(err)
 	}
-	if file.Size != length {
-		t.Errorf("erasureCreateFile returned %d, expected %d", file.Size, length)
+	if n != length {
+		t.Errorf("erasureCreateFile returned %d, expected %d", n, length)
 	}
 
 	// To generate random offset/length.
@@ -205,14 +239,23 @@ func TestErasureReadFileRandomOffsetLength(t *testing.T) {
 
 	buf := &bytes.Buffer{}
 
-	// Verify erasureReadFile() for random offsets and lengths.
+	// Verify erasure.Decode() for random offsets and lengths.
 	for i := 0; i < iterations; i++ {
 		offset := r.Int63n(length)
 		readLen := r.Int63n(length - offset)
 
 		expected := data[offset : offset+readLen]
 
-		_, err = storage.ReadFile(context.Background(), buf, "testbucket", "testobject", offset, readLen, length, file.Checksums, DefaultBitrotAlgorithm, blockSize)
+		// Get the checksums of the current part.
+		bitrotReaders := make([]*bitrotReader, len(disks))
+		for index, disk := range disks {
+			if disk == OfflineDisk {
+				continue
+			}
+			endOffset := getErasureShardFileEndOffset(offset, readLen, length, blockSize, erasure.dataBlocks)
+			bitrotReaders[index] = newBitrotReader(disk, "testbucket", "object", DefaultBitrotAlgorithm, endOffset, writers[index].Sum())
+		}
+		err = erasure.Decode(context.Background(), buf, bitrotReaders, offset, readLen, length)
 		if err != nil {
 			t.Fatal(err, offset, readLen)
 		}
@@ -226,89 +269,105 @@ func TestErasureReadFileRandomOffsetLength(t *testing.T) {
 
 // Benchmarks
 
-func benchmarkErasureRead(data, parity, dataDown, parityDown int, size int64, b *testing.B) {
+func benchmarkErasureDecode(data, parity, dataDown, parityDown int, size int64, b *testing.B) {
 	setup, err := newErasureTestSetup(data, parity, blockSizeV1)
 	if err != nil {
 		b.Fatalf("failed to create test setup: %v", err)
 	}
 	defer setup.Remove()
-	storage, err := NewErasureStorage(context.Background(), setup.disks, data, parity, blockSizeV1)
+	disks := setup.disks
+	erasure, err := NewErasure(context.Background(), data, parity, blockSizeV1)
 	if err != nil {
 		b.Fatalf("failed to create ErasureStorage: %v", err)
 	}
 
+	writers := make([]*bitrotWriter, len(disks))
+	for i, disk := range disks {
+		if disk == nil {
+			continue
+		}
+		writers[i] = newBitrotWriter(disk, "testbucket", "object", DefaultBitrotAlgorithm)
+	}
+
 	content := make([]byte, size)
 	buffer := make([]byte, blockSizeV1, 2*blockSizeV1)
-	file, err := storage.CreateFile(context.Background(), bytes.NewReader(content), "testbucket", "object", buffer, DefaultBitrotAlgorithm, data+1)
+	_, err = erasure.Encode(context.Background(), bytes.NewReader(content), writers, buffer, erasure.dataBlocks+1)
 	if err != nil {
 		b.Fatalf("failed to create erasure test file: %v", err)
 	}
-	checksums := file.Checksums
 
 	for i := 0; i < dataDown; i++ {
-		storage.disks[i] = OfflineDisk
+		writers[i] = nil
 	}
 	for i := data; i < data+parityDown; i++ {
-		storage.disks[i] = OfflineDisk
+		writers[i] = nil
 	}
 
 	b.ResetTimer()
 	b.SetBytes(size)
 	b.ReportAllocs()
 	for i := 0; i < b.N; i++ {
-		if file, err = storage.ReadFile(context.Background(), bytes.NewBuffer(content[:0]), "testbucket", "object", 0, size, size, checksums, DefaultBitrotAlgorithm, blockSizeV1); err != nil {
+		bitrotReaders := make([]*bitrotReader, len(disks))
+		for index, disk := range disks {
+			if writers[index] == nil {
+				continue
+			}
+			endOffset := getErasureShardFileEndOffset(0, size, size, erasure.blockSize, erasure.dataBlocks)
+			bitrotReaders[index] = newBitrotReader(disk, "testbucket", "object", DefaultBitrotAlgorithm, endOffset, writers[index].Sum())
+		}
+		if err = erasure.Decode(context.Background(), bytes.NewBuffer(content[:0]), bitrotReaders, 0, size, size); err != nil {
 			panic(err)
 		}
 	}
 }
 
-func BenchmarkErasureReadQuick(b *testing.B) {
+func BenchmarkErasureDecodeQuick(b *testing.B) {
 	const size = 12 * 1024 * 1024
-	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 0, size, b) })
-	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 1, size, b) })
-	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 1, 0, size, b) })
-	b.Run(" X0|X0 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 1, 1, size, b) })
+	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 0, 0, size, b) })
+	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 0, 1, size, b) })
+	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 1, 0, size, b) })
+	b.Run(" X0|X0 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 1, 1, size, b) })
 }
 
-func BenchmarkErasureRead_4_64KB(b *testing.B) {
+func BenchmarkErasureDecode_4_64KB(b *testing.B) {
 	const size = 64 * 1024
-	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 0, size, b) })
-	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 1, size, b) })
-	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 1, 0, size, b) })
-	b.Run(" X0|X0 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 1, 1, size, b) })
-	b.Run(" 00|XX ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 2, size, b) })
-	b.Run(" XX|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 2, 0, size, b) })
+	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 0, 0, size, b) })
+	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 0, 1, size, b) })
+	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 1, 0, size, b) })
+	b.Run(" X0|X0 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 1, 1, size, b) })
+	b.Run(" 00|XX ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 0, 2, size, b) })
+	b.Run(" XX|00 ", func(b *testing.B) { benchmarkErasureDecode(2, 2, 2, 0, size, b) })
 }
 
-func BenchmarkErasureRead_8_20MB(b *testing.B) {
+func BenchmarkErasureDecode_8_20MB(b *testing.B) {
 	const size = 20 * 1024 * 1024
-	b.Run(" 0000|0000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 0, 0, size, b) })
-	b.Run(" 0000|X000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 0, 1, size, b) })
-	b.Run(" X000|0000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 1, 0, size, b) })
-	b.Run(" X000|X000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 1, 1, size, b) })
-	b.Run(" 0000|XXXX ", func(b *testing.B) { benchmarkErasureRead(4, 4, 0, 4, size, b) })
-	b.Run(" XX00|XX00 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 2, 2, size, b) })
-	b.Run(" XXXX|0000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 4, 0, size, b) })
+	b.Run(" 0000|0000 ", func(b *testing.B) { benchmarkErasureDecode(4, 4, 0, 0, size, b) })
+	b.Run(" 0000|X000 ", func(b *testing.B) { benchmarkErasureDecode(4, 4, 0, 1, size, b) })
+	b.Run(" X000|0000 ", func(b *testing.B) { benchmarkErasureDecode(4, 4, 1, 0, size, b) })
+	b.Run(" X000|X000 ", func(b *testing.B) { benchmarkErasureDecode(4, 4, 1, 1, size, b) })
+	b.Run(" 0000|XXXX ", func(b *testing.B) { benchmarkErasureDecode(4, 4, 0, 4, size, b) })
+	b.Run(" XX00|XX00 ", func(b *testing.B) { benchmarkErasureDecode(4, 4, 2, 2, size, b) })
+	b.Run(" XXXX|0000 ", func(b *testing.B) { benchmarkErasureDecode(4, 4, 4, 0, size, b) })
 }
 
-func BenchmarkErasureRead_12_30MB(b *testing.B) {
+func BenchmarkErasureDecode_12_30MB(b *testing.B) {
 	const size = 30 * 1024 * 1024
-	b.Run(" 000000|000000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 0, 0, size, b) })
-	b.Run(" 000000|X00000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 0, 1, size, b) })
-	b.Run(" X00000|000000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 1, 0, size, b) })
-	b.Run(" X00000|X00000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 1, 1, size, b) })
-	b.Run(" 000000|XXXXXX ", func(b *testing.B) { benchmarkErasureRead(6, 6, 0, 6, size, b) })
-	b.Run(" XXX000|XXX000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 3, 3, size, b) })
-	b.Run(" XXXXXX|000000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 6, 0, size, b) })
+	b.Run(" 000000|000000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 0, 0, size, b) })
+	b.Run(" 000000|X00000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 0, 1, size, b) })
+	b.Run(" X00000|000000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 1, 0, size, b) })
+	b.Run(" X00000|X00000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 1, 1, size, b) })
+	b.Run(" 000000|XXXXXX ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 0, 6, size, b) })
+	b.Run(" XXX000|XXX000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 3, 3, size, b) })
+	b.Run(" XXXXXX|000000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 6, 0, size, b) })
 }
 
-func BenchmarkErasureRead_16_40MB(b *testing.B) {
+func BenchmarkErasureDecode_16_40MB(b *testing.B) {
 	const size = 40 * 1024 * 1024
-	b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 0, 0, size, b) })
-	b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 0, 1, size, b) })
-	b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 1, 0, size, b) })
-	b.Run(" X0000000|X0000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 1, 1, size, b) })
-	b.Run(" 00000000|XXXXXXXX ", func(b *testing.B) { benchmarkErasureRead(8, 8, 0, 8, size, b) })
-	b.Run(" XXXX0000|XXXX0000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 4, 4, size, b) })
-	b.Run(" XXXXXXXX|00000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 8, 0, size, b) })
+	b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureDecode(8, 8, 0, 0, size, b) })
+	b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureDecode(8, 8, 0, 1, size, b) })
+	b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureDecode(8, 8, 1, 0, size, b) })
+	b.Run(" X0000000|X0000000 ", func(b *testing.B) { benchmarkErasureDecode(8, 8, 1, 1, size, b) })
+	b.Run(" 00000000|XXXXXXXX ", func(b *testing.B) { benchmarkErasureDecode(8, 8, 0, 8, size, b) })
+	b.Run(" XXXX0000|XXXX0000 ", func(b *testing.B) { benchmarkErasureDecode(8, 8, 4, 4, size, b) })
+	b.Run(" XXXXXXXX|00000000 ", func(b *testing.B) { benchmarkErasureDecode(8, 8, 8, 0, size, b) })
 }

cmd/erasure-encode.go

@@ -0,0 +1,109 @@
+/*
+ * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"context"
+	"io"
+
+	"sync"
+
+	"github.com/minio/minio/cmd/logger"
+)
+
+// Writes in parallel to bitrotWriters
+type parallelWriter struct {
+	writers     []*bitrotWriter
+	writeQuorum int
+	errs        []error
+}
+
+// Append appends data to bitrotWriters in parallel.
+func (p *parallelWriter) Append(ctx context.Context, blocks [][]byte) error {
+	var wg sync.WaitGroup
+
+	for i := range p.writers {
+		if p.writers[i] == nil {
+			p.errs[i] = errDiskNotFound
+			continue
+		}
+
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			p.errs[i] = p.writers[i].Append(blocks[i])
+			if p.errs[i] != nil {
+				p.writers[i] = nil
+			}
+		}(i)
+	}
+	wg.Wait()
+
+	// If nilCount >= p.writeQuorum, we return nil. This is because HealFile() uses
+	// CreateFile with p.writeQuorum=1 to accommodate healing of single disk.
+	// i.e if we do no return here in such a case, reduceWriteQuorumErrs() would
+	// return a quorum error to HealFile().
+	nilCount := 0
+	for _, err := range p.errs {
+		if err == nil {
+			nilCount++
+		}
+	}
+	if nilCount >= p.writeQuorum {
+		return nil
+	}
+	return reduceWriteQuorumErrs(ctx, p.errs, objectOpIgnoredErrs, p.writeQuorum)
+}
+
+// Encode reads from the reader, erasure-encodes the data and writes to the writers.
+func (e *Erasure) Encode(ctx context.Context, src io.Reader, writers []*bitrotWriter, buf []byte, quorum int) (total int64, err error) {
+	writer := &parallelWriter{
+		writers:     writers,
+		writeQuorum: quorum,
+		errs:        make([]error, len(writers)),
+	}
+
+	for {
+		var blocks [][]byte
+		n, err := io.ReadFull(src, buf)
+		if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
+			logger.LogIf(ctx, err)
+			return 0, err
+		}
+		eof := err == io.EOF || err == io.ErrUnexpectedEOF
+		if n == 0 && total != 0 {
+			// Reached EOF, nothing more to be done.
+			break
+		}
+		// We take care of the situation where if n == 0 and total == 0 by creating empty data and parity files.
+		blocks, err = e.EncodeData(ctx, buf[:n])
+		if err != nil {
+			logger.LogIf(ctx, err)
+			return 0, err
+		}
+
+		if err = writer.Append(ctx, blocks); err != nil {
+			logger.LogIf(ctx, err)
+			return 0, err
+		}
+		total += int64(n)
+		if eof {
+			break
+		}
+	}
+	return total, nil
+}

cmd/erasure-encode_test.go

@@ -28,13 +28,17 @@ import (
 
 type badDisk struct{ StorageAPI }
 
+func (a badDisk) String() string {
+	return "bad-disk"
+}
+
 func (a badDisk) AppendFile(volume string, path string, buf []byte) error {
 	return errFaultyDisk
 }
 
 const oneMiByte = 1 * humanize.MiByte
 
-var erasureCreateFileTests = []struct {
+var erasureEncodeTests = []struct {
 	dataBlocks                   int
 	onDisks, offDisks            int
 	blocksize, data              int64
@@ -54,24 +58,24 @@ var erasureCreateFileTests = []struct {
 	{dataBlocks: 7, onDisks: 14, offDisks: 7, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true},                 // 9
 	{dataBlocks: 8, onDisks: 16, offDisks: 8, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true},                 // 10
 	{dataBlocks: 5, onDisks: 10, offDisks: 3, blocksize: int64(oneMiByte), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                  // 11
-	{dataBlocks: 6, onDisks: 12, offDisks: 5, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 102, algorithm: 0, shouldFail: true, shouldFailQuorum: false},                                    // 12
-	{dataBlocks: 3, onDisks: 6, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: oneMiByte / 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},     // 13
-	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(oneMiByte / 2), data: oneMiByte, offset: oneMiByte/2 + 1, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 14
-	{dataBlocks: 4, onDisks: 8, offDisks: 0, blocksize: int64(oneMiByte - 1), data: oneMiByte, offset: oneMiByte - 1, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},               // 15
-	{dataBlocks: 8, onDisks: 12, offDisks: 2, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                // 16
-	{dataBlocks: 8, onDisks: 10, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                // 17
-	{dataBlocks: 10, onDisks: 14, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 17, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},              // 18
-	{dataBlocks: 2, onDisks: 6, offDisks: 2, blocksize: int64(oneMiByte), data: oneMiByte, offset: oneMiByte / 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},       // 19
-	{dataBlocks: 10, onDisks: 16, offDisks: 8, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true},                // 20
+	{dataBlocks: 3, onDisks: 6, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: oneMiByte / 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},     // 12
+	{dataBlocks: 2, onDisks: 4, offDisks: 0, blocksize: int64(oneMiByte / 2), data: oneMiByte, offset: oneMiByte/2 + 1, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false}, // 13
+	{dataBlocks: 4, onDisks: 8, offDisks: 0, blocksize: int64(oneMiByte - 1), data: oneMiByte, offset: oneMiByte - 1, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},               // 14
+	{dataBlocks: 8, onDisks: 12, offDisks: 2, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                // 15
+	{dataBlocks: 8, onDisks: 10, offDisks: 1, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                // 16
+	{dataBlocks: 10, onDisks: 14, offDisks: 0, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 17, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},              // 17
+	{dataBlocks: 2, onDisks: 6, offDisks: 2, blocksize: int64(oneMiByte), data: oneMiByte, offset: oneMiByte / 2, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},       // 18
+	{dataBlocks: 10, onDisks: 16, offDisks: 8, blocksize: int64(blockSizeV1), data: oneMiByte, offset: 0, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: true},                // 19
 }
 
-func TestErasureCreateFile(t *testing.T) {
-	for i, test := range erasureCreateFileTests {
+func TestErasureEncode(t *testing.T) {
+	for i, test := range erasureEncodeTests {
 		setup, err := newErasureTestSetup(test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
 		if err != nil {
 			t.Fatalf("Test %d: failed to create test setup: %v", i, err)
 		}
-		storage, err := NewErasureStorage(context.Background(), setup.disks, test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
+		disks := setup.disks
+		erasure, err := NewErasure(context.Background(), test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
 		if err != nil {
 			setup.Remove()
 			t.Fatalf("Test %d: failed to create ErasureStorage: %v", i, err)
@@ -83,25 +87,43 @@ func TestErasureCreateFile(t *testing.T) {
 			setup.Remove()
 			t.Fatalf("Test %d: failed to generate random test data: %v", i, err)
 		}
-		file, err := storage.CreateFile(context.Background(), bytes.NewReader(data[test.offset:]), "testbucket", "object", buffer, test.algorithm, test.dataBlocks+1)
+		writers := make([]*bitrotWriter, len(disks))
+		for i, disk := range disks {
+			if disk == OfflineDisk {
+				continue
+			}
+			writers[i] = newBitrotWriter(disk, "testbucket", "object", test.algorithm)
+		}
+		n, err := erasure.Encode(context.Background(), bytes.NewReader(data[test.offset:]), writers, buffer, erasure.dataBlocks+1)
 		if err != nil && !test.shouldFail {
 			t.Errorf("Test %d: should pass but failed with: %v", i, err)
 		}
 		if err == nil && test.shouldFail {
 			t.Errorf("Test %d: should fail but it passed", i)
 		}
-
-		if err == nil {
-			if length := int64(len(data[test.offset:])); file.Size != length {
-				t.Errorf("Test %d: invalid number of bytes written: got: #%d want #%d", i, file.Size, length)
+		for i, w := range writers {
+			if w == nil {
+				disks[i] = OfflineDisk
 			}
-			for j := range storage.disks[:test.offDisks] {
-				storage.disks[j] = badDisk{nil}
+		}
+		if err == nil {
+			if length := int64(len(data[test.offset:])); n != length {
+				t.Errorf("Test %d: invalid number of bytes written: got: #%d want #%d", i, n, length)
+			}
+			writers := make([]*bitrotWriter, len(disks))
+			for i, disk := range disks {
+				if disk == nil {
+					continue
+				}
+				writers[i] = newBitrotWriter(disk, "testbucket", "object2", test.algorithm)
+			}
+			for j := range disks[:test.offDisks] {
+				writers[j].disk = badDisk{nil}
 			}
 			if test.offDisks > 0 {
-				storage.disks[0] = OfflineDisk
+				writers[0] = nil
 			}
-			file, err = storage.CreateFile(context.Background(), bytes.NewReader(data[test.offset:]), "testbucket", "object2", buffer, test.algorithm, test.dataBlocks+1)
+			n, err = erasure.Encode(context.Background(), bytes.NewReader(data[test.offset:]), writers, buffer, erasure.dataBlocks+1)
 			if err != nil && !test.shouldFailQuorum {
 				t.Errorf("Test %d: should pass but failed with: %v", i, err)
 			}
@@ -109,8 +131,8 @@ func TestErasureCreateFile(t *testing.T) {
 				t.Errorf("Test %d: should fail but it passed", i)
 			}
 			if err == nil {
-				if length := int64(len(data[test.offset:])); file.Size != length {
-					t.Errorf("Test %d: invalid number of bytes written: got: #%d want #%d", i, file.Size, length)
+				if length := int64(len(data[test.offset:])); n != length {
+					t.Errorf("Test %d: invalid number of bytes written: got: #%d want #%d", i, n, length)
 				}
 			}
 		}
@@ -120,74 +142,82 @@ func TestErasureCreateFile(t *testing.T) {
 
 // Benchmarks
 
-func benchmarkErasureWrite(data, parity, dataDown, parityDown int, size int64, b *testing.B) {
+func benchmarkErasureEncode(data, parity, dataDown, parityDown int, size int64, b *testing.B) {
 	setup, err := newErasureTestSetup(data, parity, blockSizeV1)
 	if err != nil {
 		b.Fatalf("failed to create test setup: %v", err)
 	}
 	defer setup.Remove()
-	storage, err := NewErasureStorage(context.Background(), setup.disks, data, parity, blockSizeV1)
+	erasure, err := NewErasure(context.Background(), data, parity, blockSizeV1)
 	if err != nil {
 		b.Fatalf("failed to create ErasureStorage: %v", err)
 	}
+	disks := setup.disks
 	buffer := make([]byte, blockSizeV1, 2*blockSizeV1)
 	content := make([]byte, size)
 
 	for i := 0; i < dataDown; i++ {
-		storage.disks[i] = OfflineDisk
+		disks[i] = OfflineDisk
 	}
 	for i := data; i < data+parityDown; i++ {
-		storage.disks[i] = OfflineDisk
+		disks[i] = OfflineDisk
 	}
 
 	b.ResetTimer()
 	b.SetBytes(size)
 	b.ReportAllocs()
 	for i := 0; i < b.N; i++ {
-		_, err := storage.CreateFile(context.Background(), bytes.NewReader(content), "testbucket", "object", buffer, DefaultBitrotAlgorithm, data+1)
+		writers := make([]*bitrotWriter, len(disks))
+		for i, disk := range disks {
+			if disk == OfflineDisk {
+				continue
+			}
+			writers[i] = newBitrotWriter(disk, "testbucket", "object", DefaultBitrotAlgorithm)
+		}
+		_, err := erasure.Encode(context.Background(), bytes.NewReader(content), writers, buffer, erasure.dataBlocks+1)
 		if err != nil {
 			panic(err)
 		}
 	}
 }
 
-func BenchmarkErasureWriteQuick(b *testing.B) {
+func BenchmarkErasureEncodeQuick(b *testing.B) {
 	const size = 12 * 1024 * 1024
-	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 0, 0, size, b) })
-	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 0, 1, size, b) })
-	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 1, 0, size, b) })
+	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 0, size, b) })
+	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 1, size, b) })
+	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 1, 0, size, b) })
 }
 
-func BenchmarkErasureWrite_4_64KB(b *testing.B) {
+func BenchmarkErasureEncode_4_64KB(b *testing.B) {
 	const size = 64 * 1024
-	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 0, 0, size, b) })
-	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 0, 1, size, b) })
-	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 1, 0, size, b) })
+	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 0, size, b) })
+	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 0, 1, size, b) })
+	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureEncode(2, 2, 1, 0, size, b) })
 }
 
-func BenchmarkErasureWrite_8_20MB(b *testing.B) {
+func BenchmarkErasureEncode_8_20MB(b *testing.B) {
 	const size = 20 * 1024 * 1024
-	b.Run(" 0000|0000 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 0, 0, size, b) })
-	b.Run(" 0000|X000 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 0, 1, size, b) })
-	b.Run(" X000|0000 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 1, 0, size, b) })
-	b.Run(" 0000|XXX0 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 0, 3, size, b) })
-	b.Run(" XXX0|0000 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 3, 0, size, b) })
+	b.Run(" 0000|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 0, size, b) })
+	b.Run(" 0000|X000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 1, size, b) })
+	b.Run(" X000|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 1, 0, size, b) })
+	b.Run(" 0000|XXX0 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 0, 3, size, b) })
+	b.Run(" XXX0|0000 ", func(b *testing.B) { benchmarkErasureEncode(4, 4, 3, 0, size, b) })
 }
 
-func BenchmarkErasureWrite_12_30MB(b *testing.B) {
+func BenchmarkErasureEncode_12_30MB(b *testing.B) {
 	const size = 30 * 1024 * 1024
-	b.Run(" 000000|000000 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 0, 0, size, b) })
-	b.Run(" 000000|X00000 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 0, 1, size, b) })
-	b.Run(" X00000|000000 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 1, 0, size, b) })
-	b.Run(" 000000|XXXXX0 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 0, 5, size, b) })
-	b.Run(" XXXXX0|000000 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 5, 0, size, b) })
+	b.Run(" 000000|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 0, size, b) })
+	b.Run(" 000000|X00000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 1, size, b) })
+	b.Run(" X00000|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 1, 0, size, b) })
+	b.Run(" 000000|XXXXX0 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 0, 5, size, b) })
+	b.Run(" XXXXX0|000000 ", func(b *testing.B) { benchmarkErasureEncode(6, 6, 5, 0, size, b) })
 }
 
-func BenchmarkErasureWrite_16_40MB(b *testing.B) {
+func BenchmarkErasureEncode_16_40MB(b *testing.B) {
 	const size = 40 * 1024 * 1024
-	b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 0, 0, size, b) })
-	b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 0, 1, size, b) })
-	b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 1, 0, size, b) })
-	b.Run(" 00000000|XXXXXXX0 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 0, 7, size, b) })
-	b.Run(" XXXXXXX0|00000000 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 7, 0, size, b) })
+	b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 0, size, b) })
+	b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 1, size, b) })
+	b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 1, 0, size, b) })
+	b.Run(" 00000000|XXXXXXX0 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 7, size, b) })
+	b.Run(" XXXXXXX0|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 7, 0, size, b) })
 }

cmd/erasure-heal.go

@@ -0,0 +1,48 @@
+/*
+ * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"context"
+	"io"
+
+	"github.com/minio/minio/cmd/logger"
+)
+
+// Heal heals the shard files on non-nil writers. Note that the quorum passed is 1
+// as healing should continue even if it has been successful healing only one shard file.
+func (e Erasure) Heal(ctx context.Context, readers []*bitrotReader, writers []*bitrotWriter, size int64) error {
+	r, w := io.Pipe()
+	go func() {
+		if err := e.Decode(ctx, w, readers, 0, size, size); err != nil {
+			w.CloseWithError(err)
+			return
+		}
+		w.Close()
+	}()
+	buf := make([]byte, e.blockSize)
+	// quorum is 1 because CreateFile should continue writing as long as we are writing to even 1 disk.
+	n, err := e.Encode(ctx, r, writers, buf, 1)
+	if err != nil {
+		return err
+	}
+	if n != size {
+		logger.LogIf(ctx, errLessData)
+		return errLessData
+	}
+	return nil
+}