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<?php |
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/** |
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* Pure-PHP implementation of AES. |
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* |
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* Uses mcrypt, if available/possible, and an internal implementation, otherwise. |
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* |
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* PHP version 5 |
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* |
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* NOTE: Since AES.php is (for compatibility and phpseclib-historical reasons) virtually |
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* just a wrapper to Rijndael.php you may consider using Rijndael.php instead of |
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* to save one include_once(). |
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* |
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* If {@link self::setKeyLength() setKeyLength()} isn't called, it'll be calculated from |
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* {@link self::setKey() setKey()}. ie. if the key is 128-bits, the key length will be 128-bits. If it's 136-bits |
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* it'll be null-padded to 192-bits and 192 bits will be the key length until {@link self::setKey() setKey()} |
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* is called, again, at which point, it'll be recalculated. |
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* |
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* Since \phpseclib\Crypt\AES extends \phpseclib\Crypt\Rijndael, some functions are available to be called that, in the context of AES, don't |
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* make a whole lot of sense. {@link self::setBlockLength() setBlockLength()}, for instance. Calling that function, |
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* however possible, won't do anything (AES has a fixed block length whereas Rijndael has a variable one). |
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* |
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* Here's a short example of how to use this library: |
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* <code> |
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* <?php |
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* include 'vendor/autoload.php'; |
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* |
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* $aes = new \phpseclib\Crypt\AES(); |
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* |
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* $aes->setKey('abcdefghijklmnop'); |
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* |
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* $size = 10 * 1024; |
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* $plaintext = ''; |
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* for ($i = 0; $i < $size; $i++) { |
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* $plaintext.= 'a'; |
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* } |
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* |
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* echo $aes->decrypt($aes->encrypt($plaintext)); |
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* ?> |
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* </code> |
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* |
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* @category Crypt |
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* @package AES |
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* @author Jim Wigginton <[email protected]> |
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* @copyright 2008 Jim Wigginton |
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* @license http://www.opensource.org/licenses/mit-license.html MIT License |
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* @link http://phpseclib.sourceforge.net |
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*/ |
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namespace phpseclib\Crypt; |
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/** |
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* Pure-PHP implementation of AES. |
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* |
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* @package AES |
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* @author Jim Wigginton <[email protected]> |
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* @access public |
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*/ |
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class AES extends Rijndael |
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{ |
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/** |
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* Dummy function |
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* |
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* Since \phpseclib\Crypt\AES extends \phpseclib\Crypt\Rijndael, this function is, technically, available, but it doesn't do anything. |
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* |
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* @see \phpseclib\Crypt\Rijndael::setBlockLength() |
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* @access public |
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* @param int $length |
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*/ |
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public function setBlockLength($length) |
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{ |
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return; |
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} |
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/** |
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* Sets the key length |
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* |
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* Valid key lengths are 128, 192, and 256. If the length is less than 128, it will be rounded up to |
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* 128. If the length is greater than 128 and invalid, it will be rounded down to the closest valid amount. |
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* |
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* @see \phpseclib\Crypt\Rijndael:setKeyLength() |
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* @access public |
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* @param int $length |
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*/ |
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public function setKeyLength($length) |
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{ |
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switch ($length) { |
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case 160: |
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$length = 192; |
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break; |
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case 224: |
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$length = 256; |
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} |
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parent::setKeyLength($length); |
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} |
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/** |
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* Sets the key. |
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* |
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* Rijndael supports five different key lengths, AES only supports three. |
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* |
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* @see \phpseclib\Crypt\Rijndael:setKey() |
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* @see setKeyLength() |
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* @access public |
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* @param string $key |
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*/ |
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public function setKey($key) |
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{ |
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parent::setKey($key); |
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if (!$this->explicit_key_length) { |
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$length = strlen($key); |
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switch (true) { |
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case $length <= 16: |
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$this->key_length = 16; |
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break; |
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case $length <= 24: |
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$this->key_length = 24; |
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break; |
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default: |
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$this->key_length = 32; |
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} |
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$this->_setEngine(); |
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} |
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} |
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} |
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bytic /
omnipay-plationline
