/**
* Sets the key.
*
* Rijndael supports five different key lengths
*
* @see setKeyLength()
* @access public
* @param string $key
* @throws \LengthException if the key length isn't supported
*/
function setKey($key)
{
switch (strlen($key)) {
case 16:
case 24:
case 32:
break;
default:
throw new \LengthException('Key of size ' . strlen($key) . ' not supported by this algorithm. Only keys of sizes 16, 24 or 32 supported');
}
parent::setKey($key);
}
/**
* Test for engine validity
*
* This is mainly just a wrapper to set things up for \phpseclib\Crypt\Common\SymmetricKey::isValidEngine()
*
* @see \phpseclib\Crypt\Common\SymmetricKey::isValidEngine()
* @param int $engine
* @access public
* @return bool
*/
function isValidEngine($engine)
{
if ($engine == self::ENGINE_OPENSSL) {
if ($this->key_length != 16) {
return false;
}
$this->cipher_name_openssl_ecb = 'bf-ecb';
$this->cipher_name_openssl = 'bf-' . $this->_openssl_translate_mode();
}
return parent::isValidEngine($engine);
}
/**
* Setup the \phpseclib\Crypt\Common\SymmetricKey::ENGINE_MCRYPT $engine
*
* @see \phpseclib\Crypt\Common\SymmetricKey::_setupMcrypt()
* @access private
*/
function _setupMcrypt()
{
if (!isset($this->key)) {
$this->setKey('');
}
parent::_setupMcrypt();
}
/**
* Test for engine validity
*
* This is mainly just a wrapper to set things up for \phpseclib\Crypt\Common\SymmetricKey::isValidEngine()
*
* @see \phpseclib\Crypt\Common\SymmetricKey::__construct()
* @param int $engine
* @access public
* @return bool
*/
function isValidEngine($engine)
{
switch ($engine) {
case self::ENGINE_OPENSSL:
if ($this->block_size != 16) {
return false;
}
$this->cipher_name_openssl_ecb = 'aes-' . ($this->key_length << 3) . '-ecb';
$this->cipher_name_openssl = 'aes-' . ($this->key_length << 3) . '-' . $this->_openssl_translate_mode();
break;
case self::ENGINE_MCRYPT:
$this->cipher_name_mcrypt = 'rijndael-' . ($this->block_size << 3);
if ($this->key_length % 8) {
// is it a 160/224-bit key?
// mcrypt is not usable for them, only for 128/192/256-bit keys
return false;
}
}
return parent::isValidEngine($engine);
}
