65ff8ccf8d
errors. Backend does not enclose search in () and custom search options can't be inserted. If I am wrong, attacker was able to scrap some complex cn=*something* search expression, that could abuse ldap backend or ldap server.
377 lines
No EOL
11 KiB
PHP
377 lines
No EOL
11 KiB
PHP
<?php
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/**
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* abook_ldap_server.php
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*
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* Copyright (c) 1999-2005 The SquirrelMail Project Team
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* Licensed under the GNU GPL. For full terms see the file COPYING.
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*
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* Address book backend for LDAP server
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*
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* @version $Id$
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* @package squirrelmail
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* @subpackage addressbook
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*/
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/**
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* Address book backend for LDAP server
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*
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* An array with the following elements must be passed to
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* the class constructor (elements marked ? are optional):
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* <pre>
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* host => LDAP server hostname/IP-address
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* base => LDAP server root (base dn). Empty string allowed.
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* ? port => LDAP server TCP port number (default: 389)
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* ? charset => LDAP server charset (default: utf-8)
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* ? name => Name for LDAP server (default "LDAP: hostname")
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* Used to tag the result data
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* ? maxrows => Maximum # of rows in search result
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* ? timeout => Timeout for LDAP operations (in seconds, default: 30)
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* Might not work for all LDAP libraries or servers.
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* ? binddn => LDAP Bind DN.
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* ? bindpw => LDAP Bind Password.
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* ? protocol => LDAP Bind protocol.
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* </pre>
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* NOTE. This class should not be used directly. Use the
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* "AddressBook" class instead.
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* @package squirrelmail
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* @subpackage addressbook
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*/
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class abook_ldap_server extends addressbook_backend {
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/**
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* @var string backend type
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*/
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var $btype = 'remote';
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/**
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* @var string backend name
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*/
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var $bname = 'ldap_server';
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/* Parameters changed by class */
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/**
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* @var string displayed name
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*/
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var $sname = 'LDAP'; /* Service name */
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/**
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* @var string LDAP server name or address or url
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*/
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var $server = '';
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/**
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* @var integer LDAP server port
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*/
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var $port = 389;
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/**
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* @var string LDAP base DN
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*/
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var $basedn = '';
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/**
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* @var string charset used for entries in LDAP server
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*/
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var $charset = 'utf-8';
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/**
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* @var object PHP LDAP link ID
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*/
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var $linkid = false;
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/**
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* @var bool True if LDAP server is bound
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*/
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var $bound = false;
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/**
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* @var integer max rows in result
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*/
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var $maxrows = 250;
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/**
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* @var integer timeout of LDAP operations (in seconds)
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*/
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var $timeout = 30;
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/**
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* @var string DN to bind to (non-anonymous bind)
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* @since 1.5.0 and 1.4.3
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*/
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var $binddn = '';
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/**
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* @var string password to bind with (non-anonymous bind)
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* @since 1.5.0 and 1.4.3
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*/
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var $bindpw = '';
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/**
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* @var integer protocol used to connect to ldap server
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* @since 1.5.0 and 1.4.3
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*/
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var $protocol = '';
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/**
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* Constructor. Connects to database
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* @param array connection options
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*/
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function abook_ldap_server($param) {
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if(!function_exists('ldap_connect')) {
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$this->set_error('LDAP support missing from PHP');
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return;
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}
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if(is_array($param)) {
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$this->server = $param['host'];
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$this->basedn = $param['base'];
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if(!empty($param['port'])) {
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$this->port = $param['port'];
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}
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if(!empty($param['charset'])) {
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$this->charset = strtolower($param['charset']);
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}
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if(isset($param['maxrows'])) {
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$this->maxrows = $param['maxrows'];
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}
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if(isset($param['timeout'])) {
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$this->timeout = $param['timeout'];
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}
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if(isset($param['binddn'])) {
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$this->binddn = $param['binddn'];
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}
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if(isset($param['bindpw'])) {
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$this->bindpw = $param['bindpw'];
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}
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if(isset($param['protocol'])) {
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$this->protocol = $param['protocol'];
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}
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if(empty($param['name'])) {
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$this->sname = 'LDAP: ' . $param['host'];
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}
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else {
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$this->sname = $param['name'];
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}
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$this->open(true);
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} else {
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$this->set_error('Invalid argument to constructor');
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}
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}
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/**
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* Open the LDAP server.
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* @param bool $new is it a new connection
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* @return bool
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*/
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function open($new = false) {
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$this->error = '';
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/* Connection is already open */
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if($this->linkid != false && !$new) {
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return true;
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}
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$this->linkid = @ldap_connect($this->server, $this->port);
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if(!$this->linkid) {
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if(function_exists('ldap_error')) {
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return $this->set_error(ldap_error($this->linkid));
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} else {
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return $this->set_error('ldap_connect failed');
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}
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}
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if(!empty($this->protocol)) {
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if(!@ldap_set_option($this->linkid, LDAP_OPT_PROTOCOL_VERSION, $this->protocol)) {
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if(function_exists('ldap_error')) {
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return $this->set_error(ldap_error($this->linkid));
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} else {
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return $this->set_error('ldap_set_option failed');
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}
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}
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}
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if(!empty($this->binddn)) {
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if(!@ldap_bind($this->linkid, $this->binddn, $this->bindpw)) {
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if(function_exists('ldap_error')) {
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return $this->set_error(ldap_error($this->linkid));
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} else {
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return $this->set_error('authenticated ldap_bind failed');
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}
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}
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} else {
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if(!@ldap_bind($this->linkid)) {
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if(function_exists('ldap_error')) {
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return $this->set_error(ldap_error($this->linkid));
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} else {
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return $this->set_error('anonymous ldap_bind failed');
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}
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}
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}
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$this->bound = true;
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return true;
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}
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/**
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* Encode string to the charset used by this LDAP server
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* @param string string that has to be encoded
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* @return string encoded string
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*/
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function charset_encode($str) {
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global $default_charset;
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if($this->charset != $default_charset) {
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return charset_convert($default_charset,$str,$this->charset,false);
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} else {
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return $str;
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}
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}
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/**
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* Decode from charset used by this LDAP server to charset used by translation
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*
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* Uses SquirrelMail charset_decode functions
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* @param string string that has to be decoded
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* @return string decoded string
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*/
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function charset_decode($str) {
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global $default_charset;
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if ($this->charset != $default_charset) {
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return charset_convert($this->charset,$str,$default_charset,false);
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} else {
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return $str;
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}
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}
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/**
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* Sanitizes ldap search strings.
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* See rfc2254
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* @link http://www.faqs.org/rfcs/rfc2254.html
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* @since 1.5.1
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* @param string $string
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* @return string sanitized string
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*/
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function ldapspecialchars($string) {
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$sanitized=array('\\' => '\5c',
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'*' => '\2a',
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'(' => '\28',
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')' => '\29',
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"\x00" => '\00');
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return str_replace(array_keys($sanitized),array_values($sanitized),$string);
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}
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/* ========================== Public ======================== */
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/**
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* Search the LDAP server
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* @param string $expr search expression
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* @return array search results
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*/
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function search($expr) {
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/* To be replaced by advanded search expression parsing */
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if(is_array($expr)) return false;
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/* Encode the expression */
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$expr = $this->charset_encode($expr);
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/*
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* allow use of one asterisk in search.
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* Don't allow any ldap special chars if search is different
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*/
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if($expr!='*') {
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$expr = '*' . $this->ldapspecialchars($expr) . '*';
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}
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$expression = "cn=$expr";
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/* Make sure connection is there */
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if(!$this->open()) {
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return false;
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}
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$sret = @ldap_search($this->linkid, $this->basedn, $expression,
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array('dn', 'o', 'ou', 'sn', 'givenname', 'cn', 'mail'),
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0, $this->maxrows, $this->timeout);
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/* Should get error from server using the ldap_error() function,
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* but it only exist in the PHP LDAP documentation. */
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if(!$sret) {
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if(function_exists('ldap_error')) {
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return $this->set_error(ldap_error($this->linkid));
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} else {
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return $this->set_error('ldap_search failed');
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}
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}
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if(@ldap_count_entries($this->linkid, $sret) <= 0) {
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return array();
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}
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/* Get results */
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$ret = array();
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$returned_rows = 0;
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$res = @ldap_get_entries($this->linkid, $sret);
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for($i = 0 ; $i < $res['count'] ; $i++) {
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$row = $res[$i];
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/* Extract data common for all e-mail addresses
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* of an object. Use only the first name */
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$nickname = $this->charset_decode($row['dn']);
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$fullname = $this->charset_decode($row['cn'][0]);
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if(!empty($row['ou'][0])) {
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$label = $this->charset_decode($row['ou'][0]);
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}
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else if(!empty($row['o'][0])) {
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$label = $this->charset_decode($row['o'][0]);
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} else {
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$label = '';
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}
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if(empty($row['givenname'][0])) {
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$firstname = '';
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} else {
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$firstname = $this->charset_decode($row['givenname'][0]);
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}
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if(empty($row['sn'][0])) {
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$surname = '';
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} else {
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$surname = $this->charset_decode($row['sn'][0]);
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}
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/* Add one row to result for each e-mail address */
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if(isset($row['mail']['count'])) {
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for($j = 0 ; $j < $row['mail']['count'] ; $j++) {
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array_push($ret, array('nickname' => $nickname,
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'name' => $fullname,
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'firstname' => $firstname,
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'lastname' => $surname,
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'email' => $row['mail'][$j],
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'label' => $label,
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'backend' => $this->bnum,
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'source' => &$this->sname));
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// Limit number of hits
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$returned_rows++;
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if(($returned_rows >= $this->maxrows) &&
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($this->maxrows > 0) ) {
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ldap_free_result($sret);
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return $ret;
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}
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} // for($j ...)
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} // isset($row['mail']['count'])
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}
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ldap_free_result($sret);
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return $ret;
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} /* end search() */
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/**
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* List all entries present in LDAP server
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*
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* If you run a tiny LDAP server and you want the "List All" button
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* to show EVERYONE, disable first return call and enable the second one.
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* Remember that maxrows setting might limit list of returned entries.
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*
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* Careful with this -- it could get quite large for big sites.
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* @return array all entries in ldap server
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*/
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function list_addr() {
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return array();
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// return $this->search('*');
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}
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}
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?>
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