Update minio-go dependencies to latest 5.0.0 release (#5640)

With following changes

- Add SSE and refactor encryption API (#942) <Andreas Auernhammer>
- add copyObject test changing metadata and preserving etag (#944) <Harshavardhana>
- Add SSE-C tests for multipart, copy, get range operations (#941) <Harshavardhana>
- Removing conditional check for notificationInfoCh in api-notication (#940) <Matthew Magaldi>
- Honor prefix parameter in ListBucketPolicies API (#929) <kannappanr>
- test for empty objects uploaded with SSE-C headers (#927) <kannappanr>
- Encryption headers should also be set during initMultipart (#930) <Harshavardhana>
- Add support for Content-Language metadata header (#928) <kannappanr>
- Fix check for duplicate notification configuration entries (#917) <kannappanr>
- allow OS to cleanup sockets in TIME_WAIT (#925) <Harshavardhana>
- Sign V2: Fix signature calculation in virtual host style (#921) <A. Elleuch>
- bucket policy: Support json string in Principal field (#919) <A. Elleuch>
- Fix copyobject failure for empty files (#918) <kannappanr>
- Add new constructor NewWithOptions to SDK (#915) <poornas>
- Support redirect headers to sign again with new Host header. (#829) <Harshavardhana>
- Fail in PutObject if invalid user metadata is passed <Harshavadhana>
- PutObjectOptions Header: Don't include invalid header <Isaac Hess>
- increase max retry count to 10 (#913) <poornas>
- Add new regions for Paris and China west. (#905) <Harshavardhana>
- fix s3signer to use req.Host header (#899) <Bartłomiej Nogaś>

vendor/golang.org/x/crypto/blake2b/blake2b.go

@@ -2,8 +2,18 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Package blake2b implements the BLAKE2b hash algorithm as
-// defined in RFC 7693.
+// Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693
+// and the extendable output function (XOF) BLAKE2Xb.
+//
+// For a detailed specification of BLAKE2b see https://blake2.net/blake2.pdf
+// and for BLAKE2Xb see https://blake2.net/blake2x.pdf
+//
+// If you aren't sure which function you need, use BLAKE2b (Sum512 or New512).
+// If you need a secret-key MAC (message authentication code), use the New512
+// function with a non-nil key.
+//
+// BLAKE2X is a construction to compute hash values larger than 64 bytes. It
+// can produce hash values between 0 and 4 GiB.
 package blake2b
 
 import (
@@ -29,7 +39,10 @@ var (
 	useSSE4 bool
 )
 
-var errKeySize = errors.New("blake2b: invalid key size")
+var (
+	errKeySize  = errors.New("blake2b: invalid key size")
+	errHashSize = errors.New("blake2b: invalid hash size")
+)
 
 var iv = [8]uint64{
 	0x6a09e667f3bcc908, 0xbb67ae8584caa73b, 0x3c6ef372fe94f82b, 0xa54ff53a5f1d36f1,
@@ -73,7 +86,18 @@ func New384(key []byte) (hash.Hash, error) { return newDigest(Size384, key) }
 // key turns the hash into a MAC. The key must between zero and 64 bytes long.
 func New256(key []byte) (hash.Hash, error) { return newDigest(Size256, key) }
 
+// New returns a new hash.Hash computing the BLAKE2b checksum with a custom length.
+// A non-nil key turns the hash into a MAC. The key must between zero and 64 bytes long.
+// The hash size can be a value between 1 and 64 but it is highly recommended to use
+// values equal or greater than:
+// - 32 if BLAKE2b is used as a hash function (The key is zero bytes long).
+// - 16 if BLAKE2b is used as a MAC function (The key is at least 16 bytes long).
+func New(size int, key []byte) (hash.Hash, error) { return newDigest(size, key) }
+
 func newDigest(hashSize int, key []byte) (*digest, error) {
+	if hashSize < 1 || hashSize > Size {
+		return nil, errHashSize
+	}
 	if len(key) > Size {
 		return nil, errKeySize
 	}
@@ -171,7 +195,13 @@ func (d *digest) Write(p []byte) (n int, err error) {
 	return
 }
 
-func (d *digest) Sum(b []byte) []byte {
+func (d *digest) Sum(sum []byte) []byte {
+	var hash [Size]byte
+	d.finalize(&hash)
+	return append(sum, hash[:d.size]...)
+}
+
+func (d *digest) finalize(hash *[Size]byte) {
 	var block [BlockSize]byte
 	copy(block[:], d.block[:d.offset])
 	remaining := uint64(BlockSize - d.offset)
@@ -185,10 +215,7 @@ func (d *digest) Sum(b []byte) []byte {
 	h := d.h
 	hashBlocks(&h, &c, 0xFFFFFFFFFFFFFFFF, block[:])
 
-	var sum [Size]byte
-	for i, v := range h[:(d.size+7)/8] {
-		binary.LittleEndian.PutUint64(sum[8*i:], v)
+	for i, v := range h {
+		binary.LittleEndian.PutUint64(hash[8*i:], v)
 	}
-
-	return append(b, sum[:d.size]...)
 }