/// <inheritdoc />
public void Mask(int[] payload, AbstractCurl curl)
{
var keyChunk = curl.Rate(Constants.TritHashLength);
var round = 0;
foreach (var chunk in payload.GetChunks(Constants.TritHashLength))
{
curl.Absorb(chunk);
var curlState = curl.Rate(Constants.TritHashLength);
var length = chunk.Length;
for (var i = 0; i < length; i++)
{
payload[round * Constants.TritHashLength + i] = Converter.Sum(chunk[i], keyChunk[i]);
keyChunk[i] = curlState[i];
}
round++;
}
}
/// <inheritdoc />
public int[] Unmask(int[] payload, AbstractCurl curl)
{
var unmasked = new List <int>();
foreach (var chunk in payload.GetChunks(Constants.TritHashLength))
{
for (var i = 0; i < chunk.Length; i++)
{
chunk[i] = Converter.Sum(chunk[i], -curl.Rate(Constants.TritHashLength)[i]);
}
unmasked.AddRange(chunk);
curl.Absorb(chunk);
}
return(unmasked.ToArray());
}