added support for saml login (#1408)

src/Saml/Security/SamlAuthenticationSuccessHandler.php

@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Saml\Security;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Security\Http\Authentication\DefaultAuthenticationSuccessHandler;
+
+final class SamlAuthenticationSuccessHandler extends DefaultAuthenticationSuccessHandler
+{
+    protected function determineTargetUrl(Request $request)
+    {
+        if ($this->options['always_use_default_target_path']) {
+            return $this->options['default_target_path'];
+        }
+
+        $relayState = $request->get('RelayState');
+        if (null !== $relayState && $relayState !== $this->httpUtils->generateUri($request, $this->options['login_path'])) {
+            return $relayState;
+        }
+
+        return parent::determineTargetUrl($request);
+    }
+}