/**
* Encrypt some data with AES 256
*
* @param string $data
* The data to encrypt.
* @param string $key
* A base64 encoded encryption key.
* @param string $iv64
* A base64 encoded 16 byte IV.
*
* @return string
* An IV and cypher text, both base64 encoded.
*/
public static function aesEncrypt($data, $key, $iv64 = null)
{
if (!empty($iv64)) {
$iv = base64_decode($iv64);
} else {
$iv = Random::getInstance()->get(16, Random::BIN);
$iv64 = base64_encode($iv);
}
$key = base64_decode($key);
return $iv64 . ':' . base64_encode(openssl_encrypt($data, 'AES-256-CBC', $key, true, $iv));
}