/**
* Render the request hash field
*
* @return string the hmac field
* @author Sebastian Kurfürst <*****@*****.**>
*/
protected function renderRequestHashField()
{
$formFieldNames = $this->viewHelperVariableContainer->get('F3\\Fluid\\ViewHelpers\\FormViewHelper', 'formFieldNames');
$this->postProcessUriArgumentsForRequesthash($this->controllerContext->getUriBuilder()->getLastArguments(), $formFieldNames);
$requestHash = $this->requestHashService->generateRequestHash($formFieldNames);
return '<input type="hidden" name="__hmac" value="' . htmlspecialchars($requestHash) . '" />';
}
