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);
}
static SpongeState Theta(SpongeState state)
{
var w = state.Size.W;
var c = new bool[5, w];
for (var x = 0; x < 5; x++)
{
for (var z = 0; z < w; z++)
{
c[x, z] =
state.GetColumn(x, z).GetBits().Aggregate((lhs, rhs) => lhs ^ rhs);
}
}
var d = new bool[5, w];
for (var x = 0; x < 5; x++)
{
for (var z = 0; z < w; z++)
{
d[x, z] =
c[BinaryFunctions.Mod(x - 1, 5), z] ^ c[BinaryFunctions.Mod(x + 1, 5),
BinaryFunctions.Mod(z - 1, w)];
}
}
for (var x = 0; x < 5; x++)
{
for (var z = 0; z < w; z++)
{
var bit = d[x, z];
for (var y = 0; y < 5; y++)
{
state[x, y, z] ^= bit;
}
}
}
return(state);
}
static SpongeState Iota(SpongeState state, int round)
{
var w = state.Size.W;
var l = state.Size.L;
var rc = BitString.Zeroes(w);
int t;
var rnd = 7 * round;
for (var j = 0; j <= l; j++)
{
t = j + rnd;
var roundT = new RoundT(round, t);
if (!RoundTConstants.ContainsKey(roundT))
{
RoundTConstants.Add(roundT, RoundConstant(t));
}
rc[(1 << j) - 1] = RoundTConstants[roundT];
}
state.XorLane(state.GetLane(0, 0), rc);
return(state);
}
internal Lane(SpongeState state, int x, int y)
{
State = state;
X = x;
Y = y;
}
internal Sheet(SpongeState state, int x)
{
State = state;
X = x;
}
internal Slice(SpongeState state, int z)
{
State = state;
Z = z;
}
internal Column(SpongeState state, int x, int z)
{
State = state;
X = x;
Z = z;
}
internal Row(SpongeState state, int y, int z)
{
State = state;
Y = y;
Z = z;
}
internal Plane(SpongeState state, int y)
{
State = state;
Y = y;
}
