<?php
  /**************************************************************************\
  * phpGroupWare API - Auth from LDAP                                        *
  * This file written by Lars Kneschke <kneschke@phpgroupware.org>           *
  * and Joseph Engo <jengo@phpgroupware.org>                                 *
  * Authentication based on LDAP Server                                      *
  * Copyright (C) 2000, 2001 Joseph Engo                                     *
  * -------------------------------------------------------------------------*
  * This library is part of the phpGroupWare API                             *
  * http://www.phpgroupware.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
  {

    function authenticate($username, $passwd) {
      global $phpgw_info, $phpgw;
      //  error_reporting MUST be set to zero, otherwise you'll get nasty LDAP errors with a bad login/pass...
      //  these are just "warnings" and can be ignored.....
      error_reporting(0); 
      
      $ldap = ldap_connect($phpgw_info["server"]["ldap_host"]);
      
      // find the dn for this uid, the uid is not always in the dn
      $sri = ldap_search($ldap, $phpgw_info["server"]["ldap_context"], "uid=$username");
      $allValues = ldap_get_entries($ldap, $sri);
      if($allValues["count"] > 0)
      {
      	// 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)) return True;
      }

      // Turn error reporting back to normal
      error_reporting(7);

      // dn not found or password wrong
      return False;
    } 
    
    function change_password($old_passwd, $new_passwd) {
      global $phpgw_info, $phpgw;

      $ldap = $phpgw->common->ldapConnect();

      $encrypted_passwd = $phpgw->common->encrypt_password($new_passwd);
      $entry["userpassword"] = $encrypted_passwd;
      #$entry["phpgw_lastpasswd_change"] = time();
      $dn = $phpgw_info["user"]["account_dn"];

      if (!@ldap_modify($ldap, $dn, $entry)) return false;

      return $encrypted_passwd;
    }
  }
?>