//-----------------------------------------------------------------------
//  This file is part of the Microsoft .NET Framework SDK Code Samples.
// 
//  Copyright (C) Microsoft Corporation.  All rights reserved.
// 
//This source code is intended only as a supplement to Microsoft
//Development Tools and/or on-line documentation.  See these other
//materials for detailed information regarding Microsoft code samples.
// 
//THIS CODE AND INFORMATION ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY
//KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
//IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
//PARTICULAR PURPOSE.
//-----------------------------------------------------------------------
using System;
using System.IO;
using System.Security;
using System.Security.Cryptography;
using System.Text;

namespace Microsoft.Samples
{
	public sealed class HashTest
	{
		private HashTest()
		{
		}

		public static Byte[] ConvertStringToByteArray(String s)
		{
			return (new UnicodeEncoding()).GetBytes(s);
		}

		public static void Main()
		{
		
			String s1,s2;
	   
			Console.WriteLine("Enter String 1 To Hash:");
			s1=Console.ReadLine();
			Console.WriteLine("Enter String 2 To Hash:");
			s2=Console.ReadLine();

			//Convert s1 to byte array
			Byte[] data1ToHash = ConvertStringToByteArray(s1);	
			//Convert s2 to byte array
			Byte[] data2ToHash = ConvertStringToByteArray(s2);
		 
			//Create hash value from String 1 using MD5 instance returned by Crypto Config system
			byte[] hashvalue1 = ((HashAlgorithm) CryptoConfig.CreateFromName("MD5")).ComputeHash(data1ToHash);

			Console.WriteLine("Hash Value of String 1:"+BitConverter.ToString(hashvalue1));

			//Create hash value of String 2	using directly created instance of the MD5 class
			byte[] hashvalue2 = (new MD5CryptoServiceProvider()).ComputeHash(data2ToHash);
        		
			Console.WriteLine("Hash Value of String 2:"+BitConverter.ToString(hashvalue2));


			//Memberwise compare of hash value bytes
			int i=0;
			bool same=true;
			do
			{
				if(hashvalue1[i]!=hashvalue2[i])
				{
					same=false;
					break;
				}
				i++;
			}while(i<hashvalue1.Length);

			if(same)Console.WriteLine("The hash values of String 1 and String 2 are the same!");
			else
				Console.WriteLine("The hash values of String 1 and String 2 are not the same!");

			Console.Write("Please Press Return to continue");
			s1=Console.ReadLine();
		}

	}
}