Encrypt QueryString parameters in a GridView Hyperlink column RSS

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  winniecheria...

  Member

  38 Points

  38 Posts

  Encrypt QueryString parameters in a GridView Hyperlink column

  Aug 09, 2007 10:32 AM|LINK

  Hi
  I want to encrypt the query string appearing in the URL of a web page,
  how to do this
  
  for eg..
  I have a Hyperlink column in GridView ,, when I click that column, I pass two parameters ,
  these parameters should not be displayed in the URL ,,
  It should be in encrypted form with some other numbers …
  
  Any idea how to perform this

  gridview querystring HyperLink Encrypt

  Best Regards
  Winnie Cherian
  -------------------------------------------
  
  
  
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  klaus_b

  Contributor

  2847 Points

  566 Posts

  Re: Encrypt QueryString parameters in a GridView Hyperlink column

  Aug 09, 2007 10:55 AM|LINK

  Hi  winniecherian,

  winniecherian

  Hi
  I want to encrypt the query string appearing in the URL of a web page,
  how to do this
  

  may have a look at this article. The source is available and easy understandable. Only .NET classes are used. Try it.

   

  Servus,
  Klaus
  
  I haven't the faintest idea, but great many therefrom.
  klaus_b@.NET
  
  • Marked as answer by Thomas Sun – MSFT on Aug 13, 2007 06:25 AM
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  griff_1000

  Participant

  1330 Points

  238 Posts

  Re: Encrypt QueryString parameters in a GridView Hyperlink column

  Aug 09, 2007 11:07 AM|LINK

  If you need to keep the data secure, a query string perhaps isn't the safest method to use - there are other ways of passing data between pages.

  However, if you need to do it that way, here's an example of how to encrypt and decrypt a string that I got from
  http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemSecurityCryptography.asp

  I've pulled out a few bits which weren't relevant, see the URL above for the full example 

  using System;
  using System.IO;
  using System.Text;
  using System.Security.Cryptography;
  
  namespace RC2CryptoServiceProvider_Examples
  {
      class MyMainClass
      {
          public static void Main()
          {
              string original = "This is a much longer string of data than a public/private key algorithm will accept.";
              string roundtrip;
              ASCIIEncoding textConverter = new ASCIIEncoding();
              RC2CryptoServiceProvider rc2CSP = new RC2CryptoServiceProvider();
              byte[] fromEncrypt;
              byte[] encrypted;
              byte[] toEncrypt;
              byte[] key;
              byte[] IV;
  
              //Create a new key and initialization vector.
              rc2CSP.GenerateKey(); // You'll probably want to do this once, save it and use it in the sending and receiving pages
              rc2CSP.GenerateIV();
  
              //Get the key and IV.
              key = rc2CSP.Key;
              IV = rc2CSP.IV;
  
              //Get an encryptor.
              ICryptoTransform encryptor = rc2CSP.CreateEncryptor(key, IV);
              
              //Encrypt the data.
              MemoryStream msEncrypt = new MemoryStream();
              CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
  
              //Convert the data to a byte array.
              toEncrypt = textConverter.GetBytes(original);
  
              //Write all data to the crypto stream and flush it.
              csEncrypt.Write(toEncrypt, 0, toEncrypt.Length);
              csEncrypt.FlushFinalBlock();
  
              //Get encrypted array of bytes.
              encrypted = msEncrypt.ToArray();
  	   // You can convert this to a string, HttpUtility.UrlEncode it and use it in your querystring - you'll have to do the reverse to decrypt
  

  	   // You'll need code like this in your receving page to decrypt - you'll have to store the key somewhere in order to pass it
             // between the two pages
             //Get a decryptor that uses the same key and IV as the encryptor.
             ICryptoTransform decryptor = rc2CSP.CreateDecryptor(key, IV);
  
              //Now decrypt the previously encrypted message using the decryptor
              // obtained in the above step.
              MemoryStream msDecrypt = new MemoryStream(encrypted);
              CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
  
              fromEncrypt = new byte[encrypted.Length];
  
              //Read the data out of the crypto stream.
              csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
  
              //Convert the byte array back into a string.
              roundtrip = textConverter.GetString(fromEncrypt);
          }
      }
  }

   

  -- Please Mark Posts that helped you as Answers, and share a summary of what solved the problem.
  • Marked as answer by Thomas Sun – MSFT on Aug 13, 2007 06:24 AM