/**
* Sets the key.
*
* Rijndael supports five different key lengths, AES only supports three.
*
* @access public
* @see \Topxia\Service\Util\Phpsec\Crypt\Rijndael:setKey()
* @see setKeyLength()
*
* @param String $key
*/
public function setKey($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;
}
$this->_setEngine();
}
}
private function decrypt($data, $key)
{
$decodeKey = base64_decode($key);
$data = base64_decode($data);
$iv = substr($decodeKey, 0, 16);
$rijndael = new Rijndael();
$rijndael->setIV($iv);
$rijndael->setKey($decodeKey);
$rijndael->disablePadding();
$encrypted = $rijndael->decrypt($data);
return $encrypted;
}