diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/blake2s/blake2s.go')
| -rw-r--r-- | vendor/golang.org/x/crypto/blake2s/blake2s.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/vendor/golang.org/x/crypto/blake2s/blake2s.go b/vendor/golang.org/x/crypto/blake2s/blake2s.go index 7e3fc4fd8..f2d8221d1 100644 --- a/vendor/golang.org/x/crypto/blake2s/blake2s.go +++ b/vendor/golang.org/x/crypto/blake2s/blake2s.go @@ -15,8 +15,12 @@ import ( const ( // The blocksize of BLAKE2s in bytes. BlockSize = 64 + // The hash size of BLAKE2s-256 in bytes. Size = 32 + + // The hash size of BLAKE2s-128 in bytes. + Size128 = 16 ) var errKeySize = errors.New("blake2s: invalid key size") @@ -37,6 +41,17 @@ func Sum256(data []byte) [Size]byte { // key turns the hash into a MAC. The key must between zero and 32 bytes long. func New256(key []byte) (hash.Hash, error) { return newDigest(Size, key) } +// New128 returns a new hash.Hash computing the BLAKE2s-128 checksum given a +// non-empty key. Note that a 128-bit digest is too small to be secure as a +// cryptographic hash and should only be used as a MAC, thus the key argument +// is not optional. +func New128(key []byte) (hash.Hash, error) { + if len(key) == 0 { + return nil, errors.New("blake2s: a key is required for a 128-bit hash") + } + return newDigest(Size128, key) +} + func newDigest(hashSize int, key []byte) (*digest, error) { if len(key) > Size { return nil, errKeySize |