func (c *skeinConfiguration) generateConfiguration() {
tweak := newUbiTweak()
// Initialize the tweak value
tweak.startNewBlockType(uint64(Config))
tweak.setFinalBlock(true)
tweak.setBitsProcessed(32)
cipher, _ := threefish.NewSize(c.numStateWords * 64)
cipher.SetTweak(tweak.getTweak())
cipher.Encrypt64(c.configValue, c.configString)
c.configValue[0] ^= c.configString[0]
c.configValue[1] ^= c.configString[1]
c.configValue[2] ^= c.configString[2]
}
// Initialize the internal variables
//
func (s *Skein) setup(stateSize, outputSize int) {
s.cipherStateWords = stateSize / 64
s.hashSize = outputSize
s.outputBytes = (outputSize + 7) / 8
// Figure out which cipher we need based on
// the state size
s.cipher, _ = threefish.NewSize(stateSize)
// Allocate buffers
s.inputBuffer = make([]byte, s.cipherStateWords*8)
s.cipherInput = make([]uint64, s.cipherStateWords)
s.state = make([]uint64, s.cipherStateWords)
// Allocate tweak
s.ubiParameters = newUbiTweak()
}