func (d *digest) Sum(buf []byte) []byte {
digest := make([]byte, d.Size())
// Make a copy of d.state so that caller can keep writing and summing.
s := d.state
C.blake2b_final(&s, (*C.uint8_t)(&digest[0]), C.uint8_t(d.Size()))
return append(buf, digest...)
}
// Return the hash of the stream up to this point, without changing the state.
func (s *Blake2bState) Sum(b []byte) []byte {
// Make a copy of the hash state, since blake2b_final() mutates it
// but the Hash interface specifies that Sum() does not affect state.
st := s.s
var d [Blake2bOutBytes]byte
if C.blake2b_final(&st, (*C.uint8_t)(unsafe.Pointer(&d[0])),
C.uint8_t(Blake2bOutBytes)) != 0 {
panic("blake2b_final failed")
}
return append(b, d[:]...)
}
func (d *digest) Sum(buf []byte) []byte {
digest := make([]byte, d.Size())
C.blake2b_final(d.state, (*C.uint8_t)(&digest[0]), C.uint8_t(d.Size()))
return append(buf, digest...)
}