static SpongeState Rho(SpongeState state)
{
var newState = new SpongeState(state.Size, state.Rate);
var w = state.Size.W;
newState.SetLane(newState.GetLane(0, 0), state.GetLane(0, 0).GetBits());
var x = 1;
var y = 0;
for (var t = 0; t < 24; t++)
{
var u = ((t + 1) * (t + 2)) >> 1;
for (var z = 0; z < w; z++)
{
newState[x, y, z] = state[x, y, BinaryFunctions.Mod(z - u, w)];
}
var oldX = x;
x = y;
y = BinaryFunctions.Mod(2 * oldX + 3 * y, 5);
}
state.SetBitString(newState.BitString);
return(state);
}
static SpongeState Pi(SpongeState state)
{
var newState = new SpongeState(state.Size, state.Rate);
var w = state.Size.W;
for (var y = 0; y < 5; y++)
{
for (var x = 0; x < 5; x++)
{
for (var z = 0; z < w; z++)
{
newState[x, y, z] = state[BinaryFunctions.Mod(x + 3 * y, 5), x, z];
}
}
}
state.SetBitString(newState.BitString);
return(state);
}