diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/blake2b/blake2b.go')
| -rw-r--r-- | vendor/golang.org/x/crypto/blake2b/blake2b.go | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/vendor/golang.org/x/crypto/blake2b/blake2b.go b/vendor/golang.org/x/crypto/blake2b/blake2b.go index 7f0a86e..6dedb89 100644 --- a/vendor/golang.org/x/crypto/blake2b/blake2b.go +++ b/vendor/golang.org/x/crypto/blake2b/blake2b.go @@ -39,7 +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, @@ -83,7 +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 } |