// Shuffle takes a (private) seed and a (possibly public) label and produces a random shuffle of the integers [0, 16).
func (rs *RandomSource) Shuffle(label []byte) encoding.Shuffle {
key := [16]byte{}
copy(key[:], label)
cached, ok := rs.encodingCache[key]
if ok {
return cached
} else {
rs.encodingCache[key] = encoding.GenerateShuffle(rs.Stream(label))
return rs.encodingCache[key]
}
}
func getShuffle(seed, label []byte) encoding.Shuffle {
key := [32]byte{}
copy(key[0:16], seed)
copy(key[16:32], label)
cached, ok := encodingCache[key]
if ok {
return cached
} else {
encodingCache[key] = encoding.GenerateShuffle(generateStream(seed, label))
return encodingCache[key]
}
}
