Exemplo n.º 1
0
        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);
        }
Exemplo n.º 2
0
        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);
        }