/**
* Save the given HTTP POST data and the destination where it should be posted to a given session.
*
* @param \SimpleSAML_Session $session The session where to temporarily store the data.
* @param string $destination The destination URL where the form should be posted.
* @param array $data An associative array with the data to be posted to $destination.
*
* @return string A random identifier that can be used to retrieve the data from the current session.
*
* @author Andjelko Horvat
* @author Jaime Perez, UNINETT AS <*****@*****.**>
*/
private static function savePOSTData(\SimpleSAML_Session $session, $destination, $data)
{
// generate a random ID to avoid replay attacks
$id = Random::generateID();
$postData = array('post' => $data, 'url' => $destination);
// save the post data to the session, tied to the random ID
$session->setData('core_postdatalink', $id, $postData);
return $id;
}