diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/blake2s/blake2s.go')
| -rw-r--r-- | vendor/golang.org/x/crypto/blake2s/blake2s.go | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/vendor/golang.org/x/crypto/blake2s/blake2s.go b/vendor/golang.org/x/crypto/blake2s/blake2s.go index f2d8221d1..ae0dc922b 100644 --- a/vendor/golang.org/x/crypto/blake2s/blake2s.go +++ b/vendor/golang.org/x/crypto/blake2s/blake2s.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 blake2s implements the BLAKE2s hash algorithm as -// defined in RFC 7693. +// Package blake2s implements the BLAKE2s hash algorithm defined by RFC 7693 +// and the extendable output function (XOF) BLAKE2Xs. +// +// For a detailed specification of BLAKE2s see https://blake2.net/blake2.pdf +// and for BLAKE2Xs see https://blake2.net/blake2x.pdf +// +// If you aren't sure which function you need, use BLAKE2s (Sum256 or New256). +// If you need a secret-key MAC (message authentication code), use the New256 +// function with a non-nil key. +// +// BLAKE2X is a construction to compute hash values larger than 32 bytes. It +// can produce hash values between 0 and 65535 bytes. package blake2s // import "golang.org/x/crypto/blake2s" import ( @@ -152,7 +162,13 @@ 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 h := d.h c := d.c @@ -165,11 +181,7 @@ func (d *digest) Sum(b []byte) []byte { c[0] -= remaining hashBlocks(&h, &c, 0xFFFFFFFF, block[:]) - - var sum [Size]byte for i, v := range h { - binary.LittleEndian.PutUint32(sum[4*i:], v) + binary.LittleEndian.PutUint32(hash[4*i:], v) } - - return append(b, sum[:d.size]...) } |