SAML2\Message::addValidator PHP Method

    public function addValidator($function, $data)
    {
        assert('is_callable($function)');
        $this->validators[] = array('Function' => $function, 'Data' => $data);
    }

 /**
  * Add a signature validator based on a SSL context.
  *
  * @param \SAML2\Message $msg     The message we should add a validator to.
  * @param resource      $context The stream context.
  */
 private static function addSSLValidator(Message $msg, $context)
 {
     $options = stream_context_get_options($context);
     if (!isset($options['ssl']['peer_certificate'])) {
         return;
     }
     //$out = '';
     //openssl_x509_export($options['ssl']['peer_certificate'], $out);
     $key = openssl_pkey_get_public($options['ssl']['peer_certificate']);
     if ($key === false) {
         Utils::getContainer()->getLogger()->warning('Unable to get public key from peer certificate.');
         return;
     }
     $keyInfo = openssl_pkey_get_details($key);
     if ($keyInfo === false) {
         Utils::getContainer()->getLogger()->warning('Unable to get key details from public key.');
         return;
     }
     if (!isset($keyInfo['key'])) {
         Utils::getContainer()->getLogger()->warning('Missing key in public key details.');
         return;
     }
     $msg->addValidator(array('\\SAML2\\SOAPClient', 'validateSSL'), $keyInfo['key']);
 }