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 Help: General / Classic ASP versions(v3.4.XX)
 convert login to asp.net c# / SHA256		  New Topic  Topic Locked
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amigo_fd
Starting Member

3 Posts
Posted - 12 April 2006 :  02:14:18  Show Profile
Hello,

I want to use the members database of snitz forum on an other part of the site which is written in ASP.NET C#. I found an easy way to convert the password to SHA256 but this returns me an other value than the one stored in the database.

Any ideas why ?

This is my code:

public string GetHash(string strPlain) {
string strRet = "";

HashAlgorithm hash = new SHA256Managed();

byte[] messageBytes = System.Text.Encoding.UTF8.GetBytes(strPlain);
byte[] HashValue = hash.ComputeHash(messageBytes);

strRet = Convert.ToBase64String(HashValue);
//strRet = HashValue.ToString();

return strRet;
}

password in the database:
UwKsxooegmiNHo/VhytG6iMoQSeWTV4Df5CD49c0Vzo=

password returned from this code:
5302acc68a1e82688d1e8fd5872b46ea23284127964d5e037f9083e3d734573a

Any ideas ?

Thanks a lot,
Frank

amigo_fd
Starting Member

3 Posts
Posted - 12 April 2006 :  02:17:10  Show Profile
sorry, it's the other way around ...

password in the database:
5302acc68a1e82688d1e8fd5872b46ea23284127964d5e037f9083e3d734573a

password returned from this code:
UwKsxooegmiNHo/VhytG6iMoQSeWTV4Df5CD49c0Vzo=
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Podge
Support Moderator

Ireland
3776 Posts
Posted - 12 April 2006 :  03:13:33  Show Profile  Send Podge an ICQ Message  Send Podge a Yahoo! Message
Try HuwR's version

public static string SHA256Hash(string Data)
{
        SHA256 sha = new SHA256Managed();
        byte[] hash = sha.ComputeHash( Encoding.ASCII.GetBytes(Data) );

        StringBuilder stringBuilder = new StringBuilder();
        foreach( byte b in hash ) 
        {
            stringBuilder.AppendFormat("{0:x2}", b);
        }
        return stringBuilder.ToString();
    }
Podge.

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Edited by - Podge on 12 April 2006 03:13:55
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amigo_fd
Starting Member

3 Posts
Posted - 12 April 2006 :  03:40:51  Show Profile
waw, thanks a lot, that one works perfectly !!!
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mafifi
Junior Member

USA
308 Posts
Posted - 15 September 2006 :  13:50:20  Show Profile  Send mafifi an ICQ Message
I am trying to use SHA 256 with different application.
  • Is there a way to covert the ASP version of SHA256 into DLL?
  • If yes, I would very much appreciate all the help I can get.
  • The password encryption by SHA256 is not reversible, right?

Regards,

Mo
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HuwR
Forum Admin

United Kingdom
20595 Posts
Posted - 15 September 2006 :  14:17:35  Show Profile  Visit HuwR's Homepage
what kind of application ? why do you need it in a dll ?

sha256 is not reversible
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mafifi
Junior Member

USA
308 Posts
Posted - 15 September 2006 :  14:44:36  Show Profile  Send mafifi an ICQ Message
http://www.flicks.com/prod.htm#authnx it uses Base64 which we do not want to use. AuthentiX uses a dll for the encryption to work so if I can take the SHA256 and convert it to DLL, I will be fine (I think).
Regards,

Mo
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HuwR
Forum Admin

United Kingdom
20595 Posts
Posted - 15 September 2006 :  17:26:24  Show Profile  Visit HuwR's Homepage
yes it should be possible to make a dll to do it, you may even find there is one already, try searching on google
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