func GenericHash(hashOut []byte, message []byte, key []byte) int {
checkHashOutSize(hashOut)
checkKeySize(key)
if key == []byte(nil) {
return int(C.crypto_generichash(
(*C.uchar)(&hashOut[0]), (C.size_t)(len(hashOut)),
(*C.uchar)(&message[0]), (C.ulonglong)(len(message)),
nil, (C.size_t)(0)))
}
return int(C.crypto_generichash(
(*C.uchar)(&hashOut[0]), (C.size_t)(len(hashOut)),
(*C.uchar)(&message[0]), (C.ulonglong)(len(message)),
(*C.uchar)(&key[0]), (C.size_t)(len(key))))
}
// I took care of the typedef confusions. This should work okay.
func CryptoGenericHash(outlen int, in []byte, key []byte) ([]byte, int) {
support.CheckSizeInRange(outlen, CryptoGenericHashBytesMin(), CryptoGenericHashBytesMax(), "out")
support.CheckSizeInRange(len(key), CryptoGenericHashKeyBytesMin(), CryptoGenericHashKeyBytesMax(), "key")
out := make([]byte, outlen)
exit := int(C.crypto_generichash(
(*C.uchar)(&out[0]),
(C.size_t)(outlen),
(*C.uchar)(&in[0]),
(C.ulonglong)(len(in)),
(*C.uchar)(&key[0]),
(C.size_t)(len(key))))
return out, exit
}
// SecureHash uses the Blake2b algorithm to generate a 256-bit (32-byte)
// hash of a message with an optional key. The key parameter can be nil if
// normal hashing, instead of authenticated hashing, is wanted.
func SecureHash(message []byte, key []byte) []byte {
out := make([]byte, 32)
var keyptr *C.uchar
var msgptr *C.uchar
var keylen C.size_t
var msglen C.ulonglong
if message == nil || len(message) == 0 {
msgptr = nil
} else {
msgptr = (*C.uchar)(&message[0])
msglen = C.ulonglong(len(message))
}
if key == nil || len(key) == 0 {
keyptr = nil
} else {
keyptr = (*C.uchar)(&key[0])
keylen = C.size_t(len(key))
}
C.crypto_generichash((*C.uchar)(&out[0]), 32,
msgptr, msglen,
keyptr, keylen)
return out
}