func Chaff(authKey *[32]byte, noncePrfx, in []byte) []byte {
out := make([]byte, len(in)*EnlargeFactor)
keys := make([]byte, 8*64)
func Chaff(authKey *[32]byte, noncePrfx, in []byte) []byte {
out := make([]byte, len(in)*EnlargeFactor)
keys := make([]byte, 8*64)