Org.BouncyCastle.Crypto.Engines.RijndaelEngine.InvMixColumn C# (CSharp) Метод

		private void InvMixColumn()
		{
			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);

				//
				// pre-lookup the log table
				//
				a0 = (a0 != 0) ? (Logtable[a0 & 0xff] & 0xff) : -1;
				a1 = (a1 != 0) ? (Logtable[a1 & 0xff] & 0xff) : -1;
				a2 = (a2 != 0) ? (Logtable[a2 & 0xff] & 0xff) : -1;
				a3 = (a3 != 0) ? (Logtable[a3 & 0xff] & 0xff) : -1;

				r0 |= (long)((Mul0xe(a0) ^ Mul0xb(a1) ^ Mul0xd(a2) ^ Mul0x9(a3)) & 0xff) << j;

				r1 |= (long)((Mul0xe(a1) ^ Mul0xb(a2) ^ Mul0xd(a3) ^ Mul0x9(a0)) & 0xff) << j;

				r2 |= (long)((Mul0xe(a2) ^ Mul0xb(a3) ^ Mul0xd(a0) ^ Mul0x9(a1)) & 0xff) << j;

				r3 |= (long)((Mul0xe(a3) ^ Mul0xb(a0) ^ Mul0xd(a1) ^ Mul0x9(a2)) & 0xff) << j;
			}

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