Neue Authentifizierungsklasse

2026-06-07 15:19:31 +00:00 · 2013-06-28 12:40:27 +00:00
parent 8747768fd7
commit 97e1ffadf8
8 changed files with 403 additions and 97 deletions
@@ -0,0 +1,143 @@
+<?php
+/* Copyright (C) 2013 FH Technikum-Wien
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Authors: Andreas Oesterreicher <andreas.oesterreicher@technikum-wien.at> 
+ *
+ */
+/**
+ * Klasse fuer Authentifizierung ueber Sessions und LDAP
+ */
+
+/**
+ * Damit Session Authentifizierung funktioniert, muss in der php.ini die option
+ * session.auto_start=1 gesetzt sein oder im Config ein session_start() hinzugefügt werden
+ */
+require_once(dirname(__FILE__).'/basis.class.php');
+
+class authentication extends auth
+{
+	public function login($username)
+	{
+		// Bei einem Login wird die Session ID erneuert
+		// um Session Fixation zu erschweren
+		session_regenerate_id();
+		$_SESSION['user'] = mb_strtolower($username);
+	}
+
+	public function getUser()
+	{
+		if(isset($_SESSION['user']))
+			return mb_strtolower($_SESSION['user']);
+		else
+			return $this->RequireLogin();
+	}
+
+	public function checkpassword($username, $passwort)
+	{
+		if($connect=ldap_connect(LDAP_SERVER))
+		{
+			// bind to ldap connection
+			if(($bind=ldap_bind($connect, LDAP_BIND_USER, LDAP_BIND_PASSWORD)) == false)
+			{
+				$this->errormsg="LDAP BIND Fehlgeschlagen";
+				return false;
+			}
+
+			// search for user
+			if (($res_id = ldap_search( $connect, LDAP_BASE_DN, LDAP_USER_SEARCH_FILTER."=$username")) == false)
+			{
+				$this->errorsmg="Suche in LDAP fehlgeschlagen";
+				return false;
+			}
+
+			if (ldap_count_entries($connect, $res_id) != 1)
+			{
+				$this->errormsg='Username wurde nicht oder oefter gefunden';
+				return false;
+			}
+
+			if (( $entry_id = ldap_first_entry($connect, $res_id))== false)
+			{
+				$this->errormsg='LDAP Fetch fehlgeschlagen';
+				return false;
+			}
+
+			if (( $user_dn = ldap_get_dn($connect, $entry_id)) == false)
+			{
+				$this->errormsg='LDAP user-dn fetched fehlgeschlagen';
+				return false;
+			}
+
+			/* Authentifizierung des User */
+			if (($link_id = @ldap_bind($connect, $user_dn, $passwort)) == false)
+			{
+				return false;
+			}
+
+			ldap_close($connect);
+			return true;
+		}
+		else
+		{
+			$this->errormsg='Verbindung zum LDAP Server fehlgeschlagen';
+		}
+		ldap_close($connect);
+		return(false);
+	}
+
+	public function RequireLogin()
+	{
+		$_SESSION['request_uri']=$_SERVER['REQUEST_URI'];
+		header('Location: '.APP_ROOT.'login.php');
+		exit;
+	}
+
+	public function isUserLoggedIn()
+	{
+		if(isset($_SESSION['user']) && $_SESSION['user']!='')
+			return true;
+		else
+			return false;
+	}
+
+	public function getOriginalUser()
+	{
+		if(isset($_SESSION['user_original']))
+			return $_SESSION['user_original'];
+		else
+			return $_SESSION['user'];
+	}
+
+	public function loginAsUser($username)
+	{
+		$_SESSION['user_original']=$_SESSION['user'];
+		$_SESSION['user']=$username;
+		session_regenerate_id();
+		return true;
+	}
+	
+	public function logout()
+	{
+		unset($_SESSION['user']);
+		unset($_SESSION['user_original']);
+		session_destroy();
+		return true;
+	}
+}
+require_once(dirname(__FILE__).'/'.AUTH_SYSTEM.'.class.php');
+
+?>