RC2 decrypt needed

Hi,
I need to decrypt a RC2 crypted password. These passwords are generated with an external (not mine) application and saved in a database.

WD Uncrypt() does not support RC2, afaik.

Does anyone know a (free?) library/dll

Arie

Hi, you should use google for a search, there are ready-made programs for encryption / decryption with rc2. Find one which does the job from the command line or by DLL.

Otherwise, there's a start:
[www.koders.com]

Kind regards,
Guenter



Edited 1 time(s). Last edit at 12/13/2008 06:25PM by Jimbo.

Hi Arie,
seems that both of us are in encryption buisiness


Ok, in case that using the dot net framework is an option you can use :

System.Security.Cryptography to implement RC2 cipher.

algorithmName = "RijnDael"
-----------------------------------------------------------------------------------------------------------------------
Just had a look at the C++ sources (Jimbo's link) ...writing a function wrapper around the C++ classes seems to be very time consuming: Good luck

C# implementation.
[www.mycsharp.de]

hth Bjoern




Edited 1 time(s). Last edit at 12/14/2008 01:36PM by BLS.

Hi Arie,

I think this is what you are looking for :

[www.chem.leeds.ac.uk]

Creating a DLL should be a piece of cake .) even porting to WD is IMO doable.
(Wish we have C-ish operators in WD)

HTH Bjoern



Edited 1 time(s). Last edit at 12/14/2008 02:10PM by BLS.

Bjoern,
To be honest: these are my first crypting steps...

I read about the Micrsoft CryptoAPI. It can be found in a good old DLL c:\windows\system32\crypt32.dll.
I think it's propageted to System.Security.Cryptography, which you mentioned as the dotnet version.

I'm struggling now getting this at work.

I found FrezCryto available from [www.frez.co.uk], which is a wrapper for crypt32.dll.
It is build in VB and is actually an activex dll (so it should be registered first). I will try this one as well, next week.
But I'm not sure if I'm allowed to register extra dll's on the machine which will become our web-server.


Arie

Hm,
IMO the DLL you are looking for (to implement RC2 crypt/encrypt) is Advapi32.dll
No ActiveX needed.
Google for CryptAcquireContext and CryptEncrypt ,,,,

Bjoern