private static SpongeState Pi(SpongeState state)
{
SpongeState newState = new SpongeState(state.Size, state.Rate);
int w = state.Size.W;
for (int y = 0; y < 5; y++)
{
for (int x = 0; x < 5; x++)
{
for (int z = 0; z < w; z++)
{
newState[x, y, z] = state[Bin.Mod(x + 3 * y, 5), x, z];
}
}
}
state.SetBitstring(newState.Bitstring);
return(state);
}
private static SpongeState Khi(SpongeState state)
{
SpongeState newState = new SpongeState(state.Size, state.Rate);
int w = state.Size.W;
for (int y = 0; y < 5; y++)
{
for (int x = 0; x < 5; x++)
{
for (int z = 0; z < w; z++)
{
newState[x, y, z] = state[x, y, z]
^ ((state[Bin.Mod(x + 1, 5), y, z] ^ true) && state[Bin.Mod(x + 2, 5), y, z]);
}
}
}
state.SetBitstring(newState.Bitstring);
return(state);
}
private static SpongeState Rho(SpongeState state)
{
SpongeState newState = new SpongeState(state.Size, state.Rate);
int w = state.Size.W;
newState.SetLane(newState.GetLane(0, 0), state.GetLane(0, 0).GetBits());
int x = 1;
int y = 0;
int u, oldX;
for (int t = 0; t < 24; t++)
{
u = ((t + 1) * (t + 2)) >> 1;
for (int z = 0; z < w; z++)
{
newState[x, y, z] = state[x, y, Bin.Mod(z - u, w)];
}
oldX = x;
x = y;
y = Bin.Mod(2 * oldX + 3 * y, 5);
}
state.SetBitstring(newState.Bitstring);
return(state);
}
