egroupware_official/phpgwapi/inc/class.ldap.inc.php

256 lines
7.7 KiB
PHP

<?php
/**************************************************************************\
* eGroupWare API - Accounts manager for LDAP *
* This file written by Lars Kneschke <l.kneschke@metaways.de> *
* View and manipulate contact records using LDAP *
* ------------------------------------------------------------------------ *
* This library is part of the eGroupWare API *
* http://www.egroupware.org/api *
* -------------------------------------------- *
* 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; version 2 of the License. *
\**************************************************************************/
/* $Id$ */
/*!
@class contacts
@abstract Contact List System
@discussion Author: jengo/Milosch <br>
This class provides a contact database scheme. <br>
It attempts to be based on the vcard 2.1 standard, with mods as needed to make for more reasonable sql storage. <br>
The LDAP schema used here may require installation of schema files available in the phpgwapi/doc/ldap dir.
Please see the README file there.
Syntax: CreateObject('phpgwapi.contacts'); <br>
Example1: $contacts = CreateObject('phpgwapi.contacts');
*/
class ldap
{
/**
* @var resource $ds holds the LDAP link identifier
*/
var $ds;
/**
* @var array $ldapServerInfo holds the detected information about the different ldap servers
*/
var $ldapServerInfo;
/**
* the constructor for this class
*/
function ldap() {
$this->restoreSessionData();
}
/**
* escapes a string for use in searchfilters meant for ldap_search.
*
* Escaped Characters are: '*', '(', ')', ' ', '\', NUL
* It's actually a PHP-Bug, that we have to escape space.
* For all other Characters, refer to RFC2254.
* @param $string either a string to be escaped, or an array of values to be escaped
*/
function getLDAPServerInfo($_host)
{
if(is_a($this->ldapServerInfo[$_host], 'ldapserverinfo')) {
return $this->ldapServerInfo[$_host];
}
return false;
}
/**
* escapes a string for use in searchfilters meant for ldap_search.
*
* Escaped Characters are: '*', '(', ')', ' ', '\', NUL
* It's actually a PHP-Bug, that we have to escape space.
* For all other Characters, refer to RFC2254.
*
* @param string/array $string either a string to be escaped, or an array of values to be escaped
*/
function quote($string)
{
return str_replace(array('\\','*','(',')','\0',' '),array('\\\\','\*','\(','\)','\\0','\20'),$string);
}
/**
* connect to the ldap server and return a handle
*
* @param $host ldap host
* @param $dn ldap dn
* @param $passwd ldap pw
*/
function ldapConnect($host='', $dn='', $passwd='')
{
if(!function_exists('ldap_connect'))
{
/* log does not exist in setup(, yet) */
if(isset($GLOBALS['egw']->log))
{
$GLOBALS['egw']->log->message('F-Abort, LDAP support unavailable');
$GLOBALS['egw']->log->commit();
}
printf('<b>Error: LDAP support unavailable</b><br>',$host);
return False;
}
if(!$host)
{
$host = $GLOBALS['egw_info']['server']['ldap_host'];
}
if(!$dn)
{
$dn = $GLOBALS['egw_info']['server']['ldap_root_dn'];
}
if(!$passwd)
{
$passwd = $GLOBALS['egw_info']['server']['ldap_root_pw'];
}
// connects to ldap server
if(!$this->ds = ldap_connect($host))
{
/* log does not exist in setup(, yet) */
if(isset($GLOBALS['egw']->log))
{
$GLOBALS['egw']->log->message('F-Abort, Failed connecting to LDAP server');
$GLOBALS['egw']->log->commit();
}
printf("<b>Error: Can't connect to LDAP server %s!</b><br>",$host);
echo function_backtrace(1);
return False;
}
if(ldap_set_option($this->ds, LDAP_OPT_PROTOCOL_VERSION, 3)) {
$supportedLDAPVersion = 3;
} else {
$supportedLDAPVersion = 2;
}
if(!isset($this->ldapServerInfo[$host])) {
//error_log("no ldap server info found");
$ldapbind = @ldap_bind($this->ds, $GLOBALS['egw_info']['server']['ldap_root_dn'], $GLOBALS['egw_info']['server']['ldap_root_pw']);
$filter='(objectclass=*)';
$justthese = array('structuralObjectClass','namingContexts','supportedLDAPVersion','subschemaSubentry');
if(($sr = @ldap_read($this->ds, '', $filter, $justthese))) {
if($info = ldap_get_entries($this->ds, $sr)) {
$ldapServerInfo = new ldapserverinfo();
$ldapServerInfo->setVersion($supportedLDAPVersion);
// check for naming contexts
if($info[0]['namingcontexts']) {
for($i=0; $i<$info[0]['namingcontexts']['count']; $i++) {
$namingcontexts[] = $info[0]['namingcontexts'][$i];
}
$ldapServerInfo->setNamingContexts($namingcontexts);
}
// check for ldap server type
if($info[0]['structuralobjectclass']) {
switch($info[0]['structuralobjectclass'][0]) {
case 'OpenLDAProotDSE':
$ldapServerType = OPENLDAP_LDAPSERVER;
break;
default:
$ldapServerType = UNKNOWN_LDAPSERVER;
break;
}
$ldapServerInfo->setServerType($ldapServerType);
}
// check for subschema entry dn
if($info[0]['subschemasubentry']) {
$subschemasubentry = $info[0]['subschemasubentry'][0];
$ldapServerInfo->setSubSchemaEntry($subschemasubentry);
}
// create list of supported objetclasses
if(!empty($subschemasubentry)) {
$filter='(objectclass=*)';
$justthese = array('objectClasses');
if($sr=ldap_read($this->ds, $subschemasubentry, $filter, $justthese)) {
if($info = ldap_get_entries($this->ds, $sr)) {
if($info[0]['objectclasses']) {
for($i=0; $i<$info[0]['objectclasses']['count']; $i++) {
$pattern = '/^\( (.*) NAME \'(\w*)\' /';
if(preg_match($pattern, $info[0]['objectclasses'][$i], $matches)) {
#_debug_array($matches);
if(count($matches) == 3) {
$supportedObjectClasses[$matches[1]] = strtolower($matches[2]);
}
}
}
$ldapServerInfo->setSupportedObjectClasses($supportedObjectClasses);
}
}
}
}
$this->ldapServerInfo[$host] = $ldapServerInfo;
}
} else {
$this->ldapServerInfo[$host] = false;
}
$this->saveSessionData();
} else {
$ldapServerInfo = $this->ldapServerInfo[$host];
}
if(!@ldap_bind($this->ds, $dn, $passwd)) {
if(isset($GLOBALS['egw']->log)) {
$GLOBALS['egw']->log->message('F-Abort, Failed binding to LDAP server');
$GLOBALS['egw']->log->commit();
}
printf("<b>Error: Can't bind to LDAP server: %s!</b> %s<br />",$dn,function_backtrace(1));
return False;
}
return $this->ds;
}
/**
* disconnect from the ldap server
*/
function ldapDisconnect()
{
if(is_resource($this->ds))
{
ldap_unbind($this->ds);
}
}
/**
* restore the session data
*/
function restoreSessionData()
{
if (isset($GLOBALS['egw']->session)) // no availible in setup
{
$this->ldapServerInfo = (array) unserialize($GLOBALS['egw']->session->appsession('ldapServerInfo'));
}
}
/**
* save the session data
*/
function saveSessionData()
{
if (isset($GLOBALS['egw']->session)) // no availible in setup
{
$GLOBALS['egw']->session->appsession('ldapServerInfo','',serialize($this->ldapServerInfo));
}
}
}
?>