private void BlockMix(ArraySegment <byte> B, byte[] Y)
{
ArraySegment <byte> .Copy(B, (2 * BlockSize - 1) * 64, BlockX, 0, 64);
for (int i = 0; i < 2 * BlockSize; ++i)
{
for (int j = 0; j < 64; ++j)
{
BlockX[j] ^= B[i * 64 + j];
}
Salsa.ComputeHash(BlockX, BlockX);
Array.Copy(BlockX, 0, Y, i * 64, 64);
}
for (int i = 0; i < BlockSize; ++i)
{
ArraySegment <byte> .Copy(Y, (i * 2) * 64, B, i * 64, 64);
}
for (int i = 0; i < BlockSize; ++i)
{
ArraySegment <byte> .Copy(Y, (i * 2 + 1) * 64, B, (i + BlockSize) * 64, 64);
}
}
private void ROMix(ArraySegment <byte> B, byte[] X, byte[] Y, byte[] V)
{
B.CopyTo(X, 0);
for (int i = 0; i < Cost; ++i)
{
Array.Copy(X, 0, V, i * (128 * BlockSize), 128 * BlockSize);
BlockMix(X, Y);
}
for (int i = 0; i < Cost; ++i)
{
ulong j = BitConverter.ToUInt64(X, (2 * BlockSize - 1) * 64);
j %= (ulong)Cost;
for (int k = 0; k < 128 * BlockSize; ++k)
{
X[k] ^= V[j * (128 * (ulong)BlockSize) + (ulong)k];
}
BlockMix(X, Y);
}
ArraySegment <byte> .Copy(X, B, 128 *BlockSize);
}