Crypt_RC4

# Procedural File: RC4.php

Source Location: /lib/3rdParty/phpseclib/Crypt/RC4.php

## Classes:

Crypt_RC4
  Pure-PHP implementation of RC4.

## Page Details:

Pure-PHP implementation of RC4.

Uses mcrypt, if available, and an internal implementation, otherwise.

PHP versions 4 and 5

Useful resources are as follows:

- ARCFOUR Algorithm
- - Wikipedia: RC4

RC4 is also known as ARCFOUR or ARC4. The reason is elaborated upon at Wikipedia. This class is named RC4 and not ARCFOUR or ARC4 because RC4 is how it is refered to in the SSH1 specification.

Here's a short example of how to use this library:

1. <?php
2. include('Crypt/RC4.php');
4. $rc4 = new Crypt_RC4 ();
6. $rc4->setKey('abcdefgh');
8. $size = 10 * 1024;
9. $plaintext = '';
10. for ($i = 0; $i < $size; $i++) {
11. $plaintext.= 'a';
12. }
14. echo $rc4->decrypt($rc4->encrypt($plaintext));
15. ?>

LICENSE: Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#### Tags:

author: | Jim Wigginton <terrafrost@php.net>
version: | $Id: RC4.php,v 1.2 2011/05/19 18:02:11 gruberroland Exp $
copyright: | MMVII Jim Wigginton
link: | http://phpseclib.sourceforge.net
license: | MIT License

Documentation generated on Tue, 22 Nov 2011 16:30:05 +0100 by phpDocumentor 1.4.1