Org.BouncyCastle.Crypto.Engines.RijndaelEngine.MixColumn C# (CSharp) Method

		private void MixColumn()
		{
			long r0, r1, r2, r3;

			r0 = r1 = r2 = r3 = 0;

			for (int j = 0; j < BC; j += 8)
			{
				int a0 = (int)((A0 >> j) & 0xff);
				int a1 = (int)((A1 >> j) & 0xff);
				int a2 = (int)((A2 >> j) & 0xff);
				int a3 = (int)((A3 >> j) & 0xff);

				r0 |= (long)((Mul0x2(a0) ^ Mul0x3(a1) ^ a2 ^ a3) & 0xff) << j;

				r1 |= (long)((Mul0x2(a1) ^ Mul0x3(a2) ^ a3 ^ a0) & 0xff) << j;

				r2 |= (long)((Mul0x2(a2) ^ Mul0x3(a3) ^ a0 ^ a1) & 0xff) << j;

				r3 |= (long)((Mul0x2(a3) ^ Mul0x3(a0) ^ a1 ^ a2) & 0xff) << j;
			}

			A0 = r0;
			A1 = r1;
			A2 = r2;
			A3 = r3;
		}