optional possibility to provide a URL for SLO Response

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

lib/Controller/SettingsController.php

@@ -57,6 +57,7 @@ class SettingsController extends Controller {
 		$params = $this->admin->getForm()->getParams();
 		$params['idp'] = [
 			'singleLogoutService.url' => ['required' => false],
+			'singleLogoutService.responseUrl' => ['required' => false],
 			'singleSignOnService.url' => ['required' => false],
 			'entityId' => ['required' => false],
 			'x509cert' => ['required' => false],
@@ -91,6 +92,7 @@ class SettingsController extends Controller {
 		$params = $this->admin->getForm()->getParams();
 		$params['idp'] = [
 			'singleLogoutService.url' => null,
+			'singleLogoutService.responseUrl' => null,
 			'singleSignOnService.url' => null,
 			'idp-entityId' => null,
 		];

lib/SAMLSettings.php

@@ -158,6 +158,11 @@ class SAMLSettings {
 			$settings['sp']['singleLogoutService'] = [
 				'url' => $this->urlGenerator->linkToRouteAbsolute('user_saml.SAML.singleLogoutService'),
 			];
+
+			$sloResponseUrl = $this->config->getAppValue('user_saml', $prefix . 'idp-singleLogoutService.responseUrl', '');
+			if($sloResponseUrl !== '') {
+				$settings['idp']['singleLogoutService']['responseUrl'] = $sloResponseUrl;
+			}
 		}
 
 		return $settings;

templates/admin.php

@@ -132,6 +132,7 @@ style('user_saml', 'admin');
 			<p><span class="toggle"><?php p($l->t('Show optional Identity Provider settings…')) ?></span></p>
 			<div class="hidden">
 				<p><input name="singleLogoutService.url" value="<?php p(\OC::$server->getConfig()->getAppValue('user_saml', 'idp-singleLogoutService.url', '')) ?>" type="text" placeholder="<?php p($l->t('URL Location of the IdP where the SP will send the SLO Request')) ?>"/></p>
+				<p><input name="singleLogoutService.responseUrl" value="<?php p(\OC::$server->getConfig()->getAppValue('user_saml', 'idp-singleLogoutService.responseUrl', '')) ?>" type="text" placeholder="<?php p($l->t('URL Location of the IDP\'s SLO Response')) ?>"/></p>
 				<p><textarea name="x509cert" placeholder="<?php p($l->t('Public X.509 certificate of the IdP')) ?>"><?php p(\OC::$server->getConfig()->getAppValue('user_saml', 'idp-x509cert', '')) ?></textarea></p>
 			</div>
 		</div>