OpenConext / Stepup-Gateway

        }

        $loaResolution = $this->get('surfnet_stepup.service.loa_resolution');

        if (!$loaResolution->hasLoa($authnContextClassRef)) {

            $logger->info(

              sprintf(

                'Requested required Loa "%s" does not exist, sending response with status Requester Error',

                $authnContextClassRef

              )

            );

            $responseRendering = $this->get(

              'gateway.service.saml_response'

            );

            return $responseRendering->renderRequesterFailureResponse(

              $this->get(self::RESPONSE_CONTEXT_SERVICE_ID)

            );

        }

        $loa = $loaResolution->getLoa($authnContextClassRef);

        $authContextClass = $loa->fetchAuthnContextClassOfType(

          AuthnContextClass::TYPE_GATEWAY

        );

        if (!$authContextClass->isIdentifiedBy($authnContextClassRef)) {

            $logger->info(

              sprintf(

                'Requested required Loa "%s" is of the wrong type, sending response with status Requester Error',

                $authnContextClassRef

              )

            );

            $responseRendering = $this->get(

              'gateway.service.saml_response'

            );

            return $responseRendering->renderRequesterFailureResponse(

              $this->get(self::RESPONSE_CONTEXT_SERVICE_ID)

            );

        }

        return null;

    }