/**
* Initializes AES instance using either provided $options or session values
* @param array $options Array of options, containing 'key' and 'iv' values
* @return mixed|void
* @throws Exception
*/
public function initSymmetric($options = array())
{
if (empty($options) && Session::has('aes_key') && Session::has('aes_iv')) {
$options = array('key' => Session::get('aes_key'), 'iv' => Session::get('aes_iv'));
}
if (!(isset($options['key']) && isset($options['iv']))) {
\Log::error("Either key or iv not set");
throw new \Exception("Either key or iv not set");
}
Session::put('aes_key', $options['key']);
Session::put('aes_iv', $options['iv']);
$aes = new \Crypt_AES(CRYPT_AES_MODE_CBC);
$aes->setKeyLength(256);
$aes->setKey(Base64::UrlDecode($options['key']));
$aes->setIV(Base64::UrlDecode($options['iv']));
$aes->enablePadding();
$this->aes = $aes;
$this->isAesInitialized = true;
}
function SendEncryptedResponse($message)
{
$aes = new Crypt_AES(CRYPT_AES_MODE_CBC);
$aes->setKeyLength(256);
$aes->setKey(Base64UrlDecode($_SESSION['key']));
$aes->setIV(Base64UrlDecode($_SESSION['iv']));
$aes->enablePadding();
// This is PKCS
echo Base64UrlEncode($aes->encrypt($message));
exit;
}
