context: //
  // MD5Test.cs - NUnit Test Cases for MD5 (RFC1321)
  //
  // Author:
  //	Sebastien Pouliot (spouliot@motus.com)
  //
  // (C) 2002 Motus Technologies Inc. (http://www.motus.com)
  //
  
  using System;
  using System.IO;
  using System.Security.Cryptography;
  using System.Text;
  
  using Mono.Security.Cryptography;
  using NUnit.Framework;
  
  namespace MonoTests.Security.Cryptography {
  
  // References:
  // a.	The MD5 Message-Digest Algorithm
  //	http://www.ietf.org/rfc/RFC1321.txt
  
  // MD5 is a abstract class - so ALL of the test included here wont be tested
  // on the abstract class but should be tested in ALL its descendants.
  public class MD5Test {
  
  	protected MD5 hash;
  
  	// because most crypto stuff works with byte[] buffers
  	static public void AssertEquals (string msg, byte[] array1, byte[] array2) 
  	{
  		if ((array1 == null) && (array2 == null))
  			return;
  		if (array1 == null)
  			Assertion.Fail (msg + " -> First array is NULL");
  		if (array2 == null)
  			Assertion.Fail (msg + " -> Second array is NULL");
  
  		bool a = (array1.Length == array2.Length);
  		if (a) {
  			for (int i = 0; i < array1.Length; i++) {
  				if (array1 [i] != array2 [i]) {
  					a = false;
  					break;
  				}
  			}
  		}
  		if (array1.Length > 0) {
  			msg += " -> Expected " + BitConverter.ToString (array1, 0);
  			msg += " is different than " + BitConverter.ToString (array2, 0);
  		}
  		Assertion.Assert (msg, a);
  	}
  
  	// MD5 ("") = d41d8cd98f00b204e9800998ecf8427e
  	[Test]
  	public void RFC1321_Test1 () 
  	{
  		string className = hash.ToString ();
  		byte[] result = { 0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04, 0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e };
  		byte[] input = new byte [0];
  
  		string testName = className + " 1";
  		RFC1321_a (testName, hash, input, result);
  		RFC1321_b (testName, hash, input, result);
  		RFC1321_c (testName, hash, input, result);
  		RFC1321_d (testName, hash, input, result);
  		// N/A RFC1321_e (testName, hash, input, result);
  	}
  
  	// MD5 ("a") = 0cc175b9c0f1b6a831c399e269772661
  	[Test]
  	public void RFC1321_Test2 () 
  	{
  		string className = hash.ToString ();
  		byte[] result = { 0x0c, 0xc1, 0x75, 0xb9, 0xc0, 0xf1, 0xb6, 0xa8, 0x31, 0xc3, 0x99, 0xe2, 0x69, 0x77, 0x26, 0x61 };
  		byte[] input = Encoding.Default.GetBytes ("a");
  
  		string testName = className + " 2";
  		RFC1321_a (testName, hash, input, result);
  		RFC1321_b (testName, hash, input, result);
  		RFC1321_c (testName, hash, input, result);
  		RFC1321_d (testName, hash, input, result);
  		RFC1321_e (testName, hash, input, result);
  	}
  
  	// MD5 ("abc") = 900150983cd24fb0d6963f7d28e17f72
  	[Test]
  	public void RFC1321_Test3 () 
  	{
  		string className = hash.ToString ();
  		byte[] result = { 0x90, 0x01, 0x50, 0x98, 0x3c, 0xd2, 0x4f, 0xb0, 0xd6, 0x96, 0x3f, 0x7d, 0x28, 0xe1, 0x7f, 0x72 };
  		byte[] input = Encoding.Default.GetBytes ("abc");
  
  		string testName = className + " 3";
  		RFC1321_a (testName, hash, input, result);
  		RFC1321_b (testName, hash, input, result);
  		RFC1321_c (testName, hash, input, result);
  		RFC1321_d (testName, hash, input, result);
  		RFC1321_e (testName, hash, input, result);
  	}
  
  	// MD5 ("message digest") = f96b697d7cb7938d525a2f31aaf161d0
  	[Test]
  	public void RFC1321_Test4 () 
  	{
  		string className = hash.ToString ();
  		byte[] result = { 0xf9, 0x6b, 0x69, 0x7d, 0x7c, 0xb7, 0x93, 0x8d, 0x52, 0x5a, 0x2f, 0x31, 0xaa, 0xf1, 0x61, 0xd0 };
  		byte[] input = Encoding.Default.GetBytes ("message digest");
  
  		string testName = className + " 4";
  		RFC1321_a (testName, hash, input, result);
  		RFC1321_b (testName, hash, input, result);
  		RFC1321_c (testName, hash, input, result);
  		RFC1321_d (testName, hash, input, result);
  		RFC1321_e (testName, hash, input, result);
  	}
  
  	// MD5 ("abcdefghijklmnopqrstuvwxyz") = c3fcd3d76192e4007dfb496cca67e13b
  	[Test]
  	public void RFC1321_Test5 () 
  	{
  		string className = hash.ToString ();
  		byte[] result = { 0xc3, 0xfc, 0xd3, 0xd7, 0x61, 0x92, 0xe4, 0x00, 0x7d, 0xfb, 0x49, 0x6c, 0xca, 0x67, 0xe1, 0x3b };
  		byte[] input = Encoding.Default.GetBytes ("abcdefghijklmnopqrstuvwxyz");
  
  		string testName = className + " 5";
  		RFC1321_a (testName, hash, input, result);
  		RFC1321_b (testName, hash, input, result);
  		RFC1321_c (testName, hash, input, result);
  		RFC1321_d (testName, hash, input, result);
  		RFC1321_e (testName, hash, input, result);
  	}
  
  	// MD5 ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789") =
  	//	d174ab98d277d9f5a5611c2c9f419d9f
  	[Test]
  	public void RFC1321_Test6 () 
  	{
  		string className = hash.ToString ();
  		byte[] result = { 0xd1, 0x74, 0xab, 0x98, 0xd2, 0x77, 0xd9, 0xf5, 0xa5, 0x61, 0x1c, 0x2c, 0x9f, 0x41, 0x9d, 0x9f };
  		byte[] input = Encoding.Default.GetBytes ("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
  
  		string testName = className + " 6";
  		RFC1321_a (testName, hash, input, result);
  		RFC1321_b (testName, hash, input, result);
  		RFC1321_c (testName, hash, input, result);
  		RFC1321_d (testName, hash, input, result);
  		RFC1321_e (testName, hash, input, result);
  	}
  
  	// MD5 ("123456789012345678901234567890123456789012345678901234567890123456
  	//	78901234567890") = 57edf4a22be3c955ac49da2e2107b67a
  	[Test]
  	public void RFC1321_Test7 () 
  	{
  		string className = hash.ToString ();
  		byte[] result = { 0x57, 0xed, 0xf4, 0xa2, 0x2b, 0xe3, 0xc9, 0x55, 0xac, 0x49, 0xda, 0x2e, 0x21, 0x07, 0xb6, 0x7a };
  		byte[] input = Encoding.Default.GetBytes ("12345678901234567890123456789012345678901234567890123456789012345678901234567890");
  
  		string testName = className + " 7";
  		RFC1321_a (testName, hash, input, result);
  		RFC1321_b (testName, hash, input, result);
  		RFC1321_c (testName, hash, input, result);
  		RFC1321_d (testName, hash, input, result);
  		RFC1321_e (testName, hash, input, result);
  	}
  
  	public void RFC1321_a (string testName, MD5 hash, byte[] input, byte[] result) 
  	{
  		byte[] output = hash.ComputeHash (input); 
  		AssertEquals (testName + ".a.1", result, output);
  		AssertEquals (testName + ".a.2", result, hash.Hash);
  		// required or next operation will still return old hash
  		hash.Initialize ();
  	}
  
  	public void RFC1321_b (string testName, MD5 hash, byte[] input, byte[] result) 
  	{
  		byte[] output = hash.ComputeHash (input, 0, input.Length); 
  		AssertEquals (testName + ".b.1", result, output);
  		AssertEquals (testName + ".b.2", result, hash.Hash);
  		// required or next operation will still return old hash
  		hash.Initialize ();
  	}
  
  	public void RFC1321_c (string testName, MD5 hash, byte[] input, byte[] result) 
  	{
  		MemoryStream ms = new MemoryStream (input);
  		byte[] output = hash.ComputeHash (ms); 
  		AssertEquals (testName + ".c.1", result, output);
  		AssertEquals (testName + ".c.2", result, hash.Hash);
  		// required or next operation will still return old hash
  		hash.Initialize ();
  	}
  
  	public void RFC1321_d (string testName, MD5 hash, byte[] input, byte[] result) 
  	{
  		byte[] output = hash.TransformFinalBlock (input, 0, input.Length);
  		AssertEquals (testName + ".d.1", input, output);
  		AssertEquals (testName + ".d.2", result, hash.Hash);
  		// required or next operation will still return old hash
  		hash.Initialize ();
  	}
  
  	public void RFC1321_e (string testName, MD5 hash, byte[] input, byte[] result) 
  	{
  
gt: 		byte[] copy = new byte [input.Length];