Looking for a Triple DES implementation

[warlord-DPNOqEs/LNQ at public.gmane.org (Derek Atkins)]

Have you tried OpenSSL?
Also, what MODE are you using?  CFB?  CBC?
What are you doing about the Initialization Vector?

There are lots of reasons that two encryptions of the same plaintext
wont result in the same ciphertext.  The question is whether the
ciphertext can be converted back to the correct plaintext.

-derek

Quoting David Kramer <david-8uUts6sDVDvs2Lz0fTdYFQ at public.gmane.org>:

> I am not Mr. Crypto.  I needed to have a PHP-based website I'm working
> on talk to a license key generator program a cow-orker wrote and return
> the key to the user. So I get it today, and guess what?  He wrote it in
> C#/.NET, which ain't gonna fly on the Linux-based web server.  DOH!
>
> So I wrote a little Triple DES program in PHP using mcrypt(), only it
> produces different output than his program.
>
> So I wrote a little Triple DES program in Perl using Crypt::TripleDES,
> only it produces different output than his program AND the PHP program.
>
> Of note, the C# program outputs text and punctuation, and both the PHP
> and Perl programs output high0order characters (non-printable).  I fed
> them both through OD to see the difference, and there was nothing in
> common between their outputs at all.
>
> Next language: C++.  Obviously, no native Triple DES functionality, and
> I haven't been able to find a library with suitable licensing which is
> cross-platform.
>
> Oh, and I have about a day to implement this, so studying Applied
> Cryptography and writing my own.
>
> - Is there some aspect of Triple DES that would produce such different
> outputs, especially the printable vs non-printable output?
>
> - Any recommendations?  PHP would be best, but if it gets implemented in
> another language, I can run the program with popen().
>
> Thanks.
>
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-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord-DPNOqEs/LNQ at public.gmane.org                        PGP key available


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