/**
* Returns all parameters as a querystring.
*
* @return string
*/
protected function stringifyParameters()
{
if (isset($this->parameters['PBX_HMAC'])) {
unset($this->parameters['PBX_HMAC']);
}
ksort($this->parameters);
return Tools::stringify($this->parameters);
}
/**
* Verifies the validity of the signature.
*
* @return bool
*/
public function verifySignature()
{
$this->logger->info('New IPN call.');
$this->initData();
$this->initSignature();
$file = fopen($this->parameters['public_key'], 'r');
$cert = fread($file, 1024);
fclose($file);
$publicKey = openssl_pkey_get_public($cert);
$result = openssl_verify(Tools::stringify($this->data), $this->signature, $publicKey, 'sha1WithRSAEncryption');
$this->logger->info(Tools::stringify($this->data));
$this->logger->info(base64_encode($this->signature));
if ($result == 1) {
$this->logger->info('Signature is valid.');
} elseif ($result == 0) {
$this->logger->error('Signature is invalid.');
} else {
$this->logger->error('Error while verifying Signature.');
}
$result = 1 == $result;
openssl_free_key($publicKey);
$event = new PayboxResponseEvent($this->data, $result);
$this->dispatcher->dispatch(PayboxEvents::PAYBOX_IPN_RESPONSE, $event);
return $result;
}