rename all remaining packages to internal/ (#12418)

This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`

internal/hash/errors.go

@@ -0,0 +1,50 @@
+// Copyright (c) 2015-2021 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package hash
+
+import "fmt"
+
+// SHA256Mismatch - when content sha256 does not match with what was sent from client.
+type SHA256Mismatch struct {
+	ExpectedSHA256   string
+	CalculatedSHA256 string
+}
+
+func (e SHA256Mismatch) Error() string {
+	return "Bad sha256: Expected " + e.ExpectedSHA256 + " does not match calculated " + e.CalculatedSHA256
+}
+
+// BadDigest - Content-MD5 you specified did not match what we received.
+type BadDigest struct {
+	ExpectedMD5   string
+	CalculatedMD5 string
+}
+
+func (e BadDigest) Error() string {
+	return "Bad digest: Expected " + e.ExpectedMD5 + " does not match calculated " + e.CalculatedMD5
+}
+
+// ErrSizeMismatch error size mismatch
+type ErrSizeMismatch struct {
+	Want int64
+	Got  int64
+}
+
+func (e ErrSizeMismatch) Error() string {
+	return fmt.Sprintf("Size mismatch: got %d, want %d", e.Got, e.Want)
+}