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