/**
* Render the request hash field
*
* @return string the hmac field
* @author Sebastian Kurfürst <*****@*****.**>
*/
protected function renderRequestHashField()
{
$formFieldNames = $this->viewHelperVariableContainer->get('Tx_Fluid_ViewHelpers_FormViewHelper', 'formFieldNames');
$this->postProcessUriArgumentsForRequesthash($this->formActionUriArguments, $formFieldNames);
$requestHash = $this->requestHashService->generateRequestHash($formFieldNames, $this->getFieldNamePrefix());
// in v4, we need to prefix __hmac as well to make it show up in the request object.
return '<input type="hidden" name="' . $this->prefixFieldName('__hmac') . '" value="' . htmlspecialchars($requestHash) . '" />';
}
