True RC4 Encryption?

[Megagix]

Hello,

I made a program that generates a key and it uses a RC4 Encryption Class. Anyways, I was converting my program to PHP so it could generate the key from my website... I got everything fixed and running except I found that I dont have a RC4 Encryption & Decryption function... Anyone know how I would encrypt & decrypt a string using RC4 in php?

Thank you,
-Jason

[mordred]

I think you need to use the mcrypt extension for this [de|en]cryption algorithm. Have a look at the manual page at http://de.php.net/mcrypt where it says:

If you linked against libmcrypt 2.4.x or higher, the following additional block algorithms are supported: CAST, LOKI97, RIJNDAEL, SAFERPLUS, SERPENT and the following stream ciphers: ENIGMA (crypt), PANAMA, RC4 and WAKE. With libmcrypt 2.4.x or higher another cipher mode is also available; nOFB.

hth

[Megagix]

Hmmm,

I downloaded a RC4 Class from http://www.devhome.org/php/tutorials/rc4crypt.html and I am having two differant results...

I use the same Key and the Same Data but I get differant Results...

KEY = 'JASON'
DATA = 'JASON'

RESULT FROM PHP: %03%0B%FB%F5%0C
RESULT FROM PROGRAM: تûُ

Can anyone help me?

Thank you,
-Jason

[mordred]

Hmh... as this is a specific problem with a class, I'd think your best bet is to ask the author if the bug is either in his class or your program.

[Megagix]

If I can't use RC4 correctly, I'm also up for suggestions of another algorithm that I can use in both VB and PHP.

Thank you Once Again,
-Jason

[mordred]

MD5 is built into PHP's core functions, and in newer versions also SHA.