1 files changed, 112 insertions, 0 deletions
diff --git a/lib/classes/auth_plugins/StudipAuthOIDC.php b/lib/classes/auth_plugins/StudipAuthOIDC.php
new file mode 100644
index 0000000..b26c17b
--- /dev/null
+++ b/lib/classes/auth_plugins/StudipAuthOIDC.php
@@ -0,0 +1,112 @@
+<?php
+/*
+ * StudipAuthOpenID.php - Stud.IP authentication using OpenID Connect
+ * Copyright (c) 2021  André Noack <noack@data-quest.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+use Jumbojett\OpenIDConnectClient;
+use Jumbojett\OpenIDConnectClientException;
+
+class StudipAuthOIDC extends StudipAuthSSO
+{
+    /**
+     * @var OpenIDConnectClient
+     */
+    private $oidc;
+
+    /**
+     * @var string
+     */
+    public $provider_url;
+    /**
+     * @var string
+     */
+    public $client_id;
+    /**
+     * @var string
+     */
+    public $client_secret;
+
+
+    /**
+     * @param array $config
+     */
+    public function __construct($config = [])
+    {
+        parent::__construct($config);
+        if (Request::get('sso') === $this->plugin_name) {
+            $this->oidc = new OpenIDConnectClient($this->provider_url, $this->client_id, $this->client_secret);
+            if (isset($this->ssl_options)) {
+                foreach ($this->ssl_options as $option_key => $option_value) {
+                    if (isset($option_value)) {
+                        $this->oidc->{'set' . $option_key}($option_value);
+                    }
+                }
+                if (Config::get()->HTTP_PROXY) {
+                    $this->oidc->setHttpProxy(Config::get()->HTTP_PROXY);
+                }
+                $return_url = URLHelper::getScriptURL($GLOBALS['ABSOLUTE_URI_STUDIP'] . 'index.php', ['sso' => $this->plugin_name, 'again' => 'yes']);
+                $this->oidc->setRedirectURL($return_url);
+                $this->oidc->addScope(['openid', 'email', 'profile']);
+            }
+        }
+    }
+
+    /**
+     * Validate the username passed to the auth plugin.
+     *
+     * @param string $username
+     *
+     * @return  string  username openid attribute user_id@domain
+     *
+     * @throws OpenIDConnectClientException
+     */
+    public function verifyUsername($username)
+    {
+
+        $this->oidc->authenticate();
+        $this->userdata = (array)$this->oidc->requestUserInfo();
+        if (isset($this->userdata['sub'])) {
+            return $this->userdata['username'] = $this->userdata['sub'] . '@' . $this->domain;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Return the current username of the pending authentication request.
+     */
+    public function getUser()
+    {
+        return $this->userdata['username'];
+    }
+
+    /**
+     * Get the user domains to assign to the current user (if any).
+     *
+     * @return array    array of user domain names
+     */
+    public function getUserDomains()
+    {
+        return $this->domain ? [$this->domain] : null;
+    }
+
+    /**
+     * Callback that can be used in user_data_mapping array.
+     *
+     * @see https://openid.net/specs/openid-connect-basic-1_0.html#StandardClaims
+     *
+     * @param string  key
+     *
+     * @return  string  parameter value (null if not set)
+     */
+    public function getUserData($key)
+    {
+        return $this->userdata[$key];
+    }
+}