private void EncryptTransform(byte[] data)
{
int size = data.Length;
int j;
byte a, c;
for (int i = 0; i < 3; i++)
{
a = 0;
for (j = size; j > 0; j--)
{
c = data[size - j];
c = RollLeft(c, 3);
c = (byte)(c + j);
c ^= a;
a = c;
c = RollRight(a, j);
c ^= 0xFF;
c += 0x48;
data[size - j] = c;
}
a = 0;
for (j = data.Length; j > 0; j--)
{
c = data[j - 1];
c = RollLeft(c, 4);
c = (byte)(c + j);
c ^= a;
a = c;
c ^= 0x13;
c = RollRight(c, 3);
data[j - 1] = c;
}
}
m_aesCipher.Transform(data, m_IV);
}
public unsafe void Transform(byte[] data)
{
m_aesCipher.Transform(data, m_IV);
byte[] newIV = new byte[IVLength] {
0xF2, 0x53, 0x50, 0xC6
};
for (int i = 0; i < IVLength; i++)
{
byte input = m_IV[i];
byte tableInput = sShiftKey[input];
newIV[0] += (byte)(sShiftKey[newIV[1]] - input);
newIV[1] -= (byte)(newIV[2] ^ tableInput);
newIV[2] ^= (byte)(sShiftKey[newIV[3]] + input);
newIV[3] -= (byte)(newIV[0] - tableInput);
fixed(byte *ptr = newIV)
* (uint *)ptr = (*(uint *)ptr << 3) | (*(uint *)ptr >> 32 - 3); //RC6 ROL 3
}
Buffer.BlockCopy(newIV, 0, m_IV, 0, IVLength);
}