Add SsoServer class - refs BT#12876

main/auth/sso/SsoServer.php

@@ -0,0 +1,57 @@
+<?php
+/* For licensing terms, see /license.txt */
+
+/**
+ * This file contains the necessary elements to implement a Single Sign On
+ * using chamilo as a SSO server
+ * @package chamilo.auth.sso
+ */
+class SsoServer
+{
+    /**
+     * This is used to get the url with the SSO params
+     * @param string $refererSso
+     * @param array $additionalParams
+     * @return string
+     */
+    public function getUrl($refererSso, $additionalParams = array())
+    {
+        if (empty($refererSso)) {
+            return null;
+        }
+
+        $getParams = parse_url($refererSso, PHP_URL_QUERY);
+        $userInfo = api_get_user_info(api_get_user_id(), false, true);
+        $chamiloUrl = api_get_path(WEB_PATH);
+        $sso = [
+            'username' => $userInfo['username'],
+            'secret' => sha1($userInfo['password']),
+            'master_domain' => $chamiloUrl,
+            'master_auth_uri' => $chamiloUrl.'?submitAuth=true',
+            'lifetime' => time() + 3600,
+            'target' => $refererSso,
+        ];
+
+        if (!empty($additionalParams)) {
+            foreach ($additionalParams as $key => $value) {
+                if (!empty($key)) {
+                    $sso[$key] = $value;
+
+                    continue;
+                }
+
+                $sso[] = $value;
+            }
+        }
+
+        $cookie = base64_encode(serialize($sso));
+
+        return $refererSso
+            .($getParams ? '&' : '?')
+            .http_build_query([
+                'loginFailed' => 0,
+                'sso_referer' => $refererSso,
+                'sso_cookie' => $cookie
+            ]);
+    }
+}