Org.BouncyCastle.Crypto.Digests.Gost3411Digest.fw C# (CSharp) Method

		private void fw(byte[] input)
		{
			cpyBytesToShort(input, wS);
			w_S[15] = (short)(wS[0] ^ wS[1] ^ wS[2] ^ wS[3] ^ wS[12] ^ wS[15]);
			Array.Copy(wS, 1, w_S, 0, 15);
			cpyShortToBytes(w_S, input);
		}