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Diffstat (limited to 'vendor/phpseclib/phpseclib2_compat/src/Crypt/AES.php')
| -rw-r--r-- | vendor/phpseclib/phpseclib2_compat/src/Crypt/AES.php | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/vendor/phpseclib/phpseclib2_compat/src/Crypt/AES.php b/vendor/phpseclib/phpseclib2_compat/src/Crypt/AES.php new file mode 100644 index 000000000..0e4da3543 --- /dev/null +++ b/vendor/phpseclib/phpseclib2_compat/src/Crypt/AES.php @@ -0,0 +1,93 @@ +<?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; + +/** + * 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; + } + + /** + * Turns key lengths, be they valid or invalid, to valid key lengths + * + * @param int $length + * @access private + * @return int + */ + protected function calculateNewKeyLength($length) + { + switch (true) { + case $length <= 128: + return 128; + case $length <= 192: + return 192; + default: + return 256; + } + } +}
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