public void HMACRIPEMD160_e (string testName, HMACRIPEMD160 hmac, byte[] input, byte[] result) 
		{
			byte[] copy = new byte [input.Length];
			for (int i=0; i < input.Length - 1; i++)
				hmac.TransformBlock (input, i, 1, copy, i);
			hmac.TransformFinalBlock (input, input.Length - 1, 1);
			Assert.AreEqual (result, hmac.Hash, testName + ".e");
			// required or next operation will still return old hash
			hmac.Initialize ();
		}