Crypt_DES

# Procedural File: DES.php

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

## Classes:

Crypt_DES
  Pure-PHP implementation of DES.

## Page Details:

Pure-PHP implementation of DES.

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

PHP versions 4 and 5

Useful resources are as follows:

- Wikipedia: DES supplementary material
- FIPS 46-2 - (DES), Data
- JavaScript DES Example

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

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

LICENSE: This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

#### Tags:

author: | Jim Wigginton <terrafrost@php.net>
version: | $Id: DES.php,v 1.1 2010/05/14 14:06:16 gruberroland Exp $
copyright: | MMVII Jim Wigginton
link: | http://phpseclib.sourceforge.net
license: | http://www.gnu.org/licenses/lgpl.txt

### CRYPT_DES_MODE_CBC [line 99]

`CRYPT_DES_MODE_CBC = 2`

Encrypt / decrypt using the Code Book Chaining mode.

#### Tags:

see: | Crypt_DES::decrypt()
see: | Crypt_DES::encrypt()
link: | http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher-block_chaining_.28CBC.29
access: | public

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### CRYPT_DES_MODE_CTR [line 87]

`CRYPT_DES_MODE_CTR = -1`

Encrypt / decrypt using the Counter mode.

Set to -1 since that's what Crypt/Random.php uses to index the CTR mode.

#### Tags:

see: | Crypt_DES::decrypt()
see: | Crypt_DES::encrypt()
link: | http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Counter_.28CTR.29
access: | public

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### CRYPT_DES_MODE_ECB [line 93]

`CRYPT_DES_MODE_ECB = 1`

Encrypt / decrypt using the Electronic Code Book mode.

#### Tags:

see: | Crypt_DES::decrypt()
see: | Crypt_DES::encrypt()
link: | http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29
access: | public

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Documentation generated on Thu, 28 Oct 2010 21:00:11 +0200 by phpDocumentor 1.4.1