Crypt_Rijndael

# Procedural File: Rijndael.php

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

## Classes:

Crypt_Rijndael
  Pure-PHP implementation of Rijndael.

## Page Details:

Pure-PHP implementation of Rijndael.

Does not use mcrypt, even when available, for reasons that are explained below.

PHP versions 4 and 5

If setBlockLength() isn't called, it'll be assumed to be 128 bits. If setKeyLength() isn't called, it'll be calculated from setKey(). ie. if the key is 128-bits, the key length will be 128-bits. If it's 136-bits it'll be null-padded to 160-bits and 160 bits will be the key length until setKey() is called, again, at which point, it'll be recalculated.

Not all Rijndael implementations may support 160-bits or 224-bits as the block length / key length. mcrypt, for example, does not. AES, itself, only supports block lengths of 128 and key lengths of 128, 192, and 256. Rijndael-ammended.pdf#page=10 defines the algorithm for block lengths of 192 and 256 but not for block lengths / key lengths of 160 and 224. Indeed, 160 and 224 are first defined as valid key / block lengths in Rijndael-ammended.pdf#page=44: Extensions: Other block and Cipher Key lengths.

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

1. <?php
2. include('Crypt/Rijndael.php');
4. $rijndael = new Crypt_Rijndael ();
6. $rijndael->setKey('abcdefghijklmnop');
8. $size = 10 * 1024;
9. $plaintext = '';
10. for ($i = 0; $i < $size; $i++) {
11. $plaintext.= 'a';
12. }
14. echo $rijndael->decrypt($rijndael->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: Rijndael.php,v 1.2 2011/05/19 18:02:11 gruberroland Exp $
copyright: | MMVIII Jim Wigginton
link: | http://phpseclib.sourceforge.net
license: | MIT License

### CRYPT_RIJNDAEL_MODE_CBC [line 98]

`CRYPT_RIJNDAEL_MODE_CBC = 2`

Encrypt / decrypt using the Code Book Chaining mode.

#### Tags:

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

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### CRYPT_RIJNDAEL_MODE_CFB [line 104]

`CRYPT_RIJNDAEL_MODE_CFB = 3`

Encrypt / decrypt using the Cipher Feedback mode.

#### Tags:

see: | Crypt_Rijndael::decrypt()
see: | Crypt_Rijndael::encrypt()
link: | http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Cipher_feedback_.28CFB.29
access: | public

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### CRYPT_RIJNDAEL_MODE_CTR [line 86]

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

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### CRYPT_RIJNDAEL_MODE_ECB [line 92]

`CRYPT_RIJNDAEL_MODE_ECB = 1`

Encrypt / decrypt using the Electronic Code Book mode.

#### Tags:

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

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### CRYPT_RIJNDAEL_MODE_OFB [line 110]

`CRYPT_RIJNDAEL_MODE_OFB = 4`

Encrypt / decrypt using the Cipher Feedback mode.

#### Tags:

see: | Crypt_Rijndael::decrypt()
see: | Crypt_Rijndael::encrypt()
link: | http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Output_feedback_.28OFB.29
access: | public

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