diff --git a/phpgwapi/inc/class.auth_ads.inc.php b/phpgwapi/inc/class.auth_ads.inc.php
new file mode 100644
index 0000000000..daf6db97a2
--- /dev/null
+++ b/phpgwapi/inc/class.auth_ads.inc.php
@@ -0,0 +1,159 @@
+<?php
+	/**************************************************************************\
+	* eGroupWare API - Auth from LDAP                                          *
+	* This file written by Lars Kneschke <lkneschke@linux-at-work.de>          *
+	* and Joseph Engo <jengo@phpgroupware.org>                                 *
+	* Authentication based on LDAP Server                                      *
+	* Copyright (C) 2000, 2001 Joseph Engo                                     *
+	* Copyright (C) 2002, 2003 Lars Kneschke                                   *
+	* -------------------------------------------------------------------------*
+	* This library is part of the eGroupWare API                               *
+	* http://www.egroupware.org/api                                            * 
+	* ------------------------------------------------------------------------ *
+	* This library is free software; you can redistribute it and/or modify it  *
+	* under the terms of the GNU Lesser General Public License as published by *
+	* the Free Software Foundation; either version 2.1 of the License,         *
+	* or any later version.                                                    *
+	* This library 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 Lesser General Public License for more details.              *
+	* You should have received a copy of the GNU Lesser General Public License *
+	* along with this library; if not, write to the Free Software Foundation,  *
+	* Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA            *
+	\**************************************************************************/
+
+	/* $Id$ */
+  
+	class auth_
+	{
+		var $previous_login = -1;
+
+		function authenticate($username, $passwd)
+		{
+			if (ereg('[()|&=*,<>!~]',$username))
+			{
+				return False;
+			}
+
+			if(!$ldap = @ldap_connect($GLOBALS['phpgw_info']['server']['ldap_host']))
+			{
+				$GLOBALS['phpgw']->log->message('F-Abort, Failed connecting to LDAP server for authenication, execution stopped');
+				$GLOBALS['phpgw']->log->commit();
+				return False;
+			}
+
+			if($GLOBALS['phpgw_info']['server']['ldap_version3'])
+			{
+				ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, 3);
+			}
+
+			/* Login with the LDAP Admin. User to find the User DN.  */
+			if(!@ldap_bind($ldap, $GLOBALS['phpgw_info']['server']['ldap_root_dn'], $GLOBALS['phpgw_info']['server']['ldap_root_pw']))
+			{
+				return False;
+			}
+			/* find the dn for this uid, the uid is not always in the dn */
+			#$attributes	= array('samaccountname','dn','givenName','sn','mail','uidNumber','gidNumber');
+			$attributes	= array('samaccountname','dn','givenName','sn','mail');
+			if ($GLOBALS['phpgw_info']['server']['account_repository'] == 'ldap')
+			{
+				$filter = "(&(samaccountname=$username)(phpgwaccountstatus=A))";
+			}
+			else
+			{
+				$filter = "(samaccountname=$username)";
+			}
+
+			$sri = ldap_search($ldap, $GLOBALS['phpgw_info']['server']['ldap_context'], $filter, $attributes);
+			$allValues = ldap_get_entries($ldap, $sri);
+
+			if ($allValues['count'] > 0)
+			{
+				if($GLOBALS['phpgw_info']['server']['case_sensitive_username'] == true)
+				{
+					if($allValues[0]['samaccountname'][0] != $username)
+					{
+						return false;
+					}
+				}
+				/* we only care about the first dn */
+				$userDN = $allValues[0]['dn'];
+				/*
+				generate a bogus password to pass if the user doesn't give us one 
+				this gets around systems that are anonymous search enabled
+				*/
+				if (empty($passwd))
+				{
+					$passwd = crypt(microtime());
+				}
+				/* try to bind as the user with user suplied password */
+				if (@ldap_bind($ldap, $userDN, $passwd))
+				{
+					if ($GLOBALS['phpgw_info']['server']['account_repository'] != 'ldap')
+					{
+						$account = CreateObject('phpgwapi.accounts',$username,'u');
+						if (!$account->account_id && $GLOBALS['phpgw_info']['server']['auto_create_acct'])
+						{
+							// create a global array with all availible info about that account
+							$GLOBALS['auto_create_acct'] = array();
+							foreach(array(
+								'givenname' => 'firstname',
+								'sn'        => 'lastname',
+								'mail'      => 'email',
+							) as $ldap_name => $acct_name)
+							{
+								$GLOBALS['auto_create_acct'][$acct_name] =
+									$GLOBALS['phpgw']->translation->convert($allValues[0][$ldap_name][0],'utf-8');
+							}
+							return True;
+						}
+						$data = $account->read_repository();
+						return $data['status'] == 'A';
+					}
+					return True;
+				}
+			}
+			/* dn not found or password wrong */
+			return False;
+		}
+
+		function change_password($old_passwd, $new_passwd, $_account_id='') 
+		{
+			if ('' == $_account_id)
+			{
+				$_account_id = $GLOBALS['phpgw_info']['user']['account_id'];
+			}
+	
+			$ds = $GLOBALS['phpgw']->common->ldapConnect();
+			$sri = ldap_search($ds, $GLOBALS['phpgw_info']['server']['ldap_context'], 'uidnumber=' . (int)$_account_id);
+			$allValues = ldap_get_entries($ds, $sri);
+	
+			$entry['userpassword'] = $this->encrypt_password($new_passwd);
+			$dn = $allValues[0]['dn'];
+	
+			if (!@ldap_modify($ds, $dn, $entry)) 
+			{
+				return false;
+			}
+			$GLOBALS['phpgw']->session->appsession('password','phpgwapi',$new_passwd);
+	
+			return $entry['userpassword'];
+		}
+
+		function update_lastlogin($_account_id, $ip)
+		{
+			$entry['phpgwaccountlastlogin']     = time();
+			$entry['phpgwaccountlastloginfrom'] = $ip;
+
+			$ds = $GLOBALS['phpgw']->common->ldapConnect();
+			$sri = ldap_search($ds, $GLOBALS['phpgw_info']['server']['ldap_context'], 'uidnumber=' . (int)$_account_id);
+			$allValues = ldap_get_entries($ds, $sri);
+
+			$dn = $allValues[0]['dn'];
+			$this->previous_login = $allValues[0]['phpgwaccountlastlogin'][0];
+
+			@ldap_modify($ds, $dn, $entry);
+		}
+	}
+?>