public void RotateLeft_RotatesTwoBits_Rotated()
{
uint value = 2147483649;
uint expected = 6;
Assert.AreEqual(expected, Word32Bits.RotateLeft(value, 2));
}
public void RotateLeft_RotatesOneBit_Rotated()
{
uint value = 2147483649;
uint expected = 3;
Assert.AreEqual(expected, Word32Bits.RotateLeft(value));
}
private uint[] Round(ITwofishMDS mds, uint[] K, int round)
{
uint F0 = TwofishFunction.h(mds, K[0], _key.SBox);
uint F1 = TwofishFunction.h(mds, Word32Bits.RotateLeft(K[1], 8), _key.SBox);
K[2] ^= F0 + F1 + _key.K[2 * round + 8];
K[2] = Word32Bits.RotateRight(K[2], 1);
K[3] = Word32Bits.RotateLeft(K[3], 1) ^ (F0 + 2 * F1 + _key.K[2 * round + 9]);
return(K);
}
private void CalculateWords(uint[] words)
{
for (int i = 8; i < 16; i++)
{
words[i] = Word32Bits.RotateLeft((uint)(words[i - 8] ^ words[i - 5] ^ words[i - 3] ^ words[i - 1] ^ PHI ^ (i - 8)), 11);
}
Array.Copy(words, 8, words, 0, 8);
for (int i = 8; i < 132; i++)
{
words[i] = Word32Bits.RotateLeft((uint)(words[i - 8] ^ words[i - 5] ^ words[i - 3] ^ words[i - 1] ^ PHI ^ i), 11);
}
}
public static uint[] Transform(uint[] x)
{
x[0] = Word32Bits.RotateLeft(x[0], 13);
x[2] = Word32Bits.RotateLeft(x[2], 3);
x[1] = x[1] ^ x[0] ^ x[2];
x[3] = x[3] ^ x[2] ^ x[0] << 3;
x[1] = Word32Bits.RotateLeft(x[1], 1);
x[3] = Word32Bits.RotateLeft(x[3], 7);
x[0] = x[0] ^ x[1] ^ x[3];
x[2] = x[2] ^ x[3] ^ x[1] << 7;
x[0] = Word32Bits.RotateLeft(x[0], 5);
x[2] = Word32Bits.RotateLeft(x[2], 22);
return(x);
}
private uint[] GetK(uint[] Me, uint[] Mo)
{
var k = new uint[40];
uint p = 16843009;
var mds = new TwofishMDS();
for (int i = 0; i < 20; i++)
{
uint A = TwofishFunction.h(mds, (uint)(2 * i * p), Me);
uint B = Word32Bits.RotateLeft(TwofishFunction.h(mds, (uint)((2 * i + 1) * p), Mo), 8);
k[2 * i] = A + B;
k[2 * i + 1] = Word32Bits.RotateLeft(A + 2 * B, 9);
}
return(k);
}