func (s *hashFunc) update(block *[4]uint64) {
threefish.IncrementTweak(&(s.tweak), threefish.BlockSize256)
threefish.UBI256(block, &(s.hVal), &(s.tweak))
s.tweak[1] &^= skein.FirstBlock
}
func (s *hashFunc) output(dst *[threefish.BlockSize256]byte, counter uint64) {
var block [4]uint64
block[0] = counter
hVal := s.hVal
var outTweak = [3]uint64{8, skein.CfgOutput<<56 | skein.FirstBlock | skein.FinalBlock, 0}
threefish.UBI256(&block, &hVal, &outTweak)
block[0] ^= counter
blockToBytes(dst[:], &block)
}
func (s *hashFunc) finalizeHash() {
threefish.IncrementTweak(&(s.tweak), uint64(s.off))
s.tweak[1] |= skein.FinalBlock // set the last block flag
for i := s.off; i < len(s.block); i++ {
s.block[i] = 0
}
s.off = 0
var block [4]uint64
bytesToBlock(&block, s.block[:])
threefish.UBI256(&block, &(s.hVal), &(s.tweak))
}