mirror of
https://github.com/danog/tgseclib.git
synced 2024-12-12 09:09:50 +01:00
33ea01f1ac
Conflicts: phpseclib/Crypt/AES.php phpseclib/Crypt/Base.php phpseclib/Crypt/Blowfish.php phpseclib/Crypt/DES.php phpseclib/Crypt/Hash.php phpseclib/Crypt/RC2.php phpseclib/Crypt/RC4.php phpseclib/Crypt/RSA.php phpseclib/Crypt/Rijndael.php phpseclib/Crypt/TripleDES.php phpseclib/Crypt/Twofish.php phpseclib/File/ASN1.php phpseclib/File/X509.php phpseclib/Math/BigInteger.php phpseclib/Net/SCP.php phpseclib/Net/SFTP.php phpseclib/Net/SSH1.php phpseclib/Net/SSH2.php phpseclib/System/SSH/Agent.php
129 lines
3.6 KiB
PHP
129 lines
3.6 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Pure-PHP implementation of AES.
|
|
*
|
|
* Uses mcrypt, if available/possible, and an internal implementation, otherwise.
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* NOTE: Since AES.php is (for compatibility and phpseclib-historical reasons) virtually
|
|
* just a wrapper to Rijndael.php you may consider using Rijndael.php instead of
|
|
* to save one include_once().
|
|
*
|
|
* If {@link self::setKeyLength() setKeyLength()} isn't called, it'll be calculated from
|
|
* {@link self::setKey() 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 192-bits and 192 bits will be the key length until {@link self::setKey() setKey()}
|
|
* is called, again, at which point, it'll be recalculated.
|
|
*
|
|
* Since \phpseclib\Crypt\AES extends \phpseclib\Crypt\Rijndael, some functions are available to be called that, in the context of AES, don't
|
|
* make a whole lot of sense. {@link self::setBlockLength() setBlockLength()}, for instance. Calling that function,
|
|
* however possible, won't do anything (AES has a fixed block length whereas Rijndael has a variable one).
|
|
*
|
|
* Here's a short example of how to use this library:
|
|
* <code>
|
|
* <?php
|
|
* include 'vendor/autoload.php';
|
|
*
|
|
* $aes = new \phpseclib\Crypt\AES();
|
|
*
|
|
* $aes->setKey('abcdefghijklmnop');
|
|
*
|
|
* $size = 10 * 1024;
|
|
* $plaintext = '';
|
|
* for ($i = 0; $i < $size; $i++) {
|
|
* $plaintext.= 'a';
|
|
* }
|
|
*
|
|
* echo $aes->decrypt($aes->encrypt($plaintext));
|
|
* ?>
|
|
* </code>
|
|
*
|
|
* @category Crypt
|
|
* @package AES
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
* @copyright 2008 Jim Wigginton
|
|
* @license http://www.opensource.org/licenses/mit-license.html MIT License
|
|
* @link http://phpseclib.sourceforge.net
|
|
*/
|
|
|
|
namespace phpseclib\Crypt;
|
|
|
|
use phpseclib\Crypt\Rijndael;
|
|
|
|
/**
|
|
* Pure-PHP implementation of AES.
|
|
*
|
|
* @package AES
|
|
* @author Jim Wigginton <terrafrost@php.net>
|
|
* @access public
|
|
*/
|
|
class AES extends Rijndael
|
|
{
|
|
/**
|
|
* Dummy function
|
|
*
|
|
* Since \phpseclib\Crypt\AES extends \phpseclib\Crypt\Rijndael, this function is, technically, available, but it doesn't do anything.
|
|
*
|
|
* @see \phpseclib\Crypt\Rijndael::setBlockLength()
|
|
* @access public
|
|
* @param int $length
|
|
*/
|
|
function setBlockLength($length)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Sets the key length
|
|
*
|
|
* Valid key lengths are 128, 192, and 256. If the length is less than 128, it will be rounded up to
|
|
* 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount.
|
|
*
|
|
* @see \phpseclib\Crypt\Rijndael:setKeyLength()
|
|
* @access public
|
|
* @param int $length
|
|
*/
|
|
function setKeyLength($length)
|
|
{
|
|
switch ($length) {
|
|
case 160:
|
|
$length = 192;
|
|
break;
|
|
case 224:
|
|
$length = 256;
|
|
}
|
|
parent::setKeyLength($length);
|
|
}
|
|
|
|
/**
|
|
* Sets the key.
|
|
*
|
|
* Rijndael supports five different key lengths, AES only supports three.
|
|
*
|
|
* @see \phpseclib\Crypt\Rijndael:setKey()
|
|
* @see setKeyLength()
|
|
* @access public
|
|
* @param string $key
|
|
*/
|
|
function setKey($key)
|
|
{
|
|
parent::setKey($key);
|
|
|
|
if (!$this->explicit_key_length) {
|
|
$length = strlen($key);
|
|
switch (true) {
|
|
case $length <= 16:
|
|
$this->key_size = 16;
|
|
break;
|
|
case $length <= 24:
|
|
$this->key_size = 24;
|
|
break;
|
|
default:
|
|
$this->key_size = 32;
|
|
}
|
|
$this->_setEngine();
|
|
}
|
|
}
|
|
}
|