* setKey('abcdefghijklmnop'); * * $size = 10 * 1024; * $plaintext = ''; * for ($i = 0; $i < $size; $i++) { * $plaintext.= 'a'; * } * * echo $rijndael->decrypt($rijndael->encrypt($plaintext)); * ?> * * * @category Crypt * @package Rijndael * @author Jim Wigginton * @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 Rijndael. * * @package Rijndael * @author Jim Wigginton * @access public */ class Rijndael extends Base { /** * Sets the block length * * Valid block lengths are 128, 160, 192, 224, 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. * * @access public * @param int $length */ public function setBlockLength($length) { $length >>= 5; if ($length > 8) { $length = 8; } elseif ($length < 4) { $length = 4; } $this->cipher->setBlockLength($length); } /** * 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 <= 160: return 160; case $length <= 192: return 192; case $length <= 224: return 224; default: return 256; } } /** * Sets the password. * * Depending on what $method is set to, setPassword()'s (optional) parameters are as follows: * {@link http://en.wikipedia.org/wiki/PBKDF2 pbkdf2} or pbkdf1: * $hash, $salt, $count, $dkLen * * Where $hash (default = sha1) currently supports the following hashes: see: Crypt/Hash.php * * @see Crypt/Hash.php * @param string $password * @param string $method * @return bool * @access public * @internal Could, but not must, extend by the child Crypt_* class */ public function setPassword($password, $method = 'pbkdf2') { $this->cipher->setKeyLength($this->key_length); $args = func_get_args(); if (in_array($method, ['pbkdf1', 'pbkdf2']) && !isset($args[3])) { $args[1] = $method; $args[2] = isset($args[2]) ? $args[2] : 'sha1'; $args[3] = 'phpseclib'; } $this->password = $args; $this->cipher->setPassword(...$args); } }