Decryption algorithm

[3bood ghzawi]

Hi all, as runing this algorithm, that decrypt an encrypted array of bytes, allways returns null as a decrypted result... the code is below:

public static void Decrypt(byte[] toEncryptArray, bool useHashing)
{
System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
//Get your key from config file to open the lock!
string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));

        if (useHashing)
        {
            MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
            D\_keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
            hashmd5.Clear();
        }
        else
            D\_keyArray = UTF8Encoding.UTF8.GetBytes(key);

        TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
        tdes.Key = D\_keyArray;
        tdes.Mode = CipherMode.ECB;
        tdes.Padding = PaddingMode.PKCS7;

        ICryptoTransform cTransform = tdes.CreateDecryptor();
        byte\[\] D\_resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
       
         //  the D\_resultArray always get a null value
        tdes.Clear();
   }

Can any one help me ,,,,,,,,, i'll be very thanks.., regards :-D

[Lost User]

http://msdn.microsoft.com/en-us/library/system.security.cryptography.tripledescryptoserviceprovider.aspx[^] use the sample there...

[3bood ghzawi]

very thanks stancrm, but sorry, i really new at C# and don't understand that........ can you make it more esey ...; thanks.., :-D

[Mycroft Holmes]

Here let me help Stan out.... Follow the link to the MSDN article Read the article to understand what you are doing Locate the c# sample in the article Highlight the sample code Copy it to the clipboard Open you test application Locate where you want to work with the sample Paste the sample into your app Wire up the events required to test the sample Create the objects required by the sample (you should understand these needs from reading the article) Put in a break point in your code Run the app. Step through the code and inspect the objects to understand in detail what you are doing. Wheres the spoon icon!!!!!

Never underestimate the power of human stupidity RAH

[Not Active]

3bood.ghzawi wrote:

can you make it more easy

:rolleyes: :omg: :wtf: You have been provided with basic cut & paste code to show you how to do it. How much easier do you want it? If you can't understand this example then you shouldn't even be attempting encryption.

---

I know the language. I've read a book. - _Madmatt

modified on Tuesday, February 2, 2010 6:54 PM

[AspDotNetDev]

That's some good spoon feeding you've got going on there. :laugh:

[Forum Guidelines]