394 lines
10 KiB
PHP
394 lines
10 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Alexander Bergolth <leo@strike.wu.ac.at>
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* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Peter Kubica <peter@kubica.ch>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Roger Szabo <roger.szabo@web.de>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\User_LDAP;
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use OC\ServerNotAvailableException;
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use OCA\User_LDAP\Exceptions\ConstraintViolationException;
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class LDAP implements ILDAPWrapper {
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protected $curFunc = '';
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protected $curArgs = array();
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/**
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* @param resource $link
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* @param string $dn
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* @param string $password
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* @return bool|mixed
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*/
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public function bind($link, $dn, $password) {
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return $this->invokeLDAPMethod('bind', $link, $dn, $password);
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}
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/**
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* @param string $host
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* @param string $port
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* @return mixed
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*/
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public function connect($host, $port) {
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if(strpos($host, '://') === false) {
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$host = 'ldap://' . $host;
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}
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if(strpos($host, ':', strpos($host, '://') + 1) === false) {
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//ldap_connect ignores port parameter when URLs are passed
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$host .= ':' . $port;
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}
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return $this->invokeLDAPMethod('connect', $host);
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}
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/**
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* @param resource $link
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* @param resource $result
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* @param string $cookie
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* @return bool|LDAP
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*/
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public function controlPagedResultResponse($link, $result, &$cookie) {
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$this->preFunctionCall('ldap_control_paged_result_response',
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array($link, $result, $cookie));
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$result = ldap_control_paged_result_response($link, $result, $cookie);
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$this->postFunctionCall();
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return $result;
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}
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/**
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* @param LDAP $link
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* @param int $pageSize
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* @param bool $isCritical
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* @param string $cookie
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* @return mixed|true
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*/
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public function controlPagedResult($link, $pageSize, $isCritical, $cookie) {
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return $this->invokeLDAPMethod('control_paged_result', $link, $pageSize,
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$isCritical, $cookie);
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}
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/**
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* @param LDAP $link
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* @param LDAP $result
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* @return mixed
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*/
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public function countEntries($link, $result) {
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return $this->invokeLDAPMethod('count_entries', $link, $result);
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}
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/**
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* @param LDAP $link
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* @return integer
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*/
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public function errno($link) {
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return $this->invokeLDAPMethod('errno', $link);
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}
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/**
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* @param LDAP $link
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* @return string
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*/
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public function error($link) {
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return $this->invokeLDAPMethod('error', $link);
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}
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/**
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* Splits DN into its component parts
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* @param string $dn
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* @param int @withAttrib
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* @return array|false
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* @link http://www.php.net/manual/en/function.ldap-explode-dn.php
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*/
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public function explodeDN($dn, $withAttrib) {
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return $this->invokeLDAPMethod('explode_dn', $dn, $withAttrib);
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}
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/**
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* @param LDAP $link
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* @param LDAP $result
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* @return mixed
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*/
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public function firstEntry($link, $result) {
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return $this->invokeLDAPMethod('first_entry', $link, $result);
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}
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/**
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* @param LDAP $link
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* @param LDAP $result
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* @return array|mixed
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*/
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public function getAttributes($link, $result) {
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return $this->invokeLDAPMethod('get_attributes', $link, $result);
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}
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/**
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* @param LDAP $link
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* @param LDAP $result
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* @return mixed|string
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*/
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public function getDN($link, $result) {
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return $this->invokeLDAPMethod('get_dn', $link, $result);
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}
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/**
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* @param LDAP $link
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* @param LDAP $result
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* @return array|mixed
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*/
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public function getEntries($link, $result) {
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return $this->invokeLDAPMethod('get_entries', $link, $result);
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}
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/**
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* @param LDAP $link
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* @param resource $result
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* @return mixed
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*/
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public function nextEntry($link, $result) {
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return $this->invokeLDAPMethod('next_entry', $link, $result);
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}
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/**
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* @param LDAP $link
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* @param string $baseDN
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* @param string $filter
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* @param array $attr
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* @return mixed
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*/
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public function read($link, $baseDN, $filter, $attr) {
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return $this->invokeLDAPMethod('read', $link, $baseDN, $filter, $attr);
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}
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/**
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* @param LDAP $link
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* @param string $baseDN
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* @param string $filter
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* @param array $attr
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* @param int $attrsOnly
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* @param int $limit
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* @return mixed
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* @throws \Exception
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*/
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public function search($link, $baseDN, $filter, $attr, $attrsOnly = 0, $limit = 0) {
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$oldHandler = set_error_handler(function($no, $message, $file, $line) use (&$oldHandler) {
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if(strpos($message, 'Partial search results returned: Sizelimit exceeded') !== false) {
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return true;
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}
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$oldHandler($no, $message, $file, $line);
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return true;
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});
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try {
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$result = $this->invokeLDAPMethod('search', $link, $baseDN, $filter, $attr, $attrsOnly, $limit);
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restore_error_handler();
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return $result;
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} catch (\Exception $e) {
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restore_error_handler();
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throw $e;
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}
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}
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/**
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* @param LDAP $link
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* @param string $userDN
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* @param string $password
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* @return bool
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*/
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public function modReplace($link, $userDN, $password) {
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return $this->invokeLDAPMethod('mod_replace', $link, $userDN, array('userPassword' => $password));
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}
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/**
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* @param LDAP $link
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* @param string $userDN
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* @param string $oldPassword
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* @param string $password
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* @return bool
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*/
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public function exopPasswd($link, $userDN, $oldPassword, $password) {
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return $this->invokeLDAPMethod('exop_passwd', $link, $userDN, $oldPassword, $password);
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}
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/**
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* @param LDAP $link
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* @param string $option
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* @param int $value
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* @return bool|mixed
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*/
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public function setOption($link, $option, $value) {
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return $this->invokeLDAPMethod('set_option', $link, $option, $value);
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}
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/**
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* @param LDAP $link
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* @return mixed|true
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*/
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public function startTls($link) {
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return $this->invokeLDAPMethod('start_tls', $link);
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}
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/**
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* @param resource $link
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* @return bool|mixed
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*/
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public function unbind($link) {
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return $this->invokeLDAPMethod('unbind', $link);
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}
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/**
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* Checks whether the server supports LDAP
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* @return boolean if it the case, false otherwise
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* */
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public function areLDAPFunctionsAvailable() {
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return function_exists('ldap_connect');
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}
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/**
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* Checks whether the submitted parameter is a resource
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* @param Resource $resource the resource variable to check
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* @return bool true if it is a resource, false otherwise
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*/
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public function isResource($resource) {
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return is_resource($resource);
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}
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/**
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* Checks whether the return value from LDAP is wrong or not.
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*
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* When using ldap_search we provide an array, in case multiple bases are
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* configured. Thus, we need to check the array elements.
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*
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* @param $result
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* @return bool
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*/
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protected function isResultFalse($result) {
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if($result === false) {
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return true;
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}
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if($this->curFunc === 'ldap_search' && is_array($result)) {
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foreach ($result as $singleResult) {
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if($singleResult === false) {
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return true;
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}
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}
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}
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return false;
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}
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/**
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* @return mixed
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*/
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protected function invokeLDAPMethod() {
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$arguments = func_get_args();
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$func = 'ldap_' . array_shift($arguments);
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if(function_exists($func)) {
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$this->preFunctionCall($func, $arguments);
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$result = call_user_func_array($func, $arguments);
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if ($this->isResultFalse($result)) {
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$this->postFunctionCall();
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}
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return $result;
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}
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return null;
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}
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/**
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* @param string $functionName
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* @param array $args
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*/
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private function preFunctionCall($functionName, $args) {
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$this->curFunc = $functionName;
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$this->curArgs = $args;
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}
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/**
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* Analyzes the returned LDAP error and acts accordingly if not 0
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*
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* @param resource $resource the LDAP Connection resource
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* @throws ConstraintViolationException
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* @throws ServerNotAvailableException
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* @throws \Exception
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*/
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private function processLDAPError($resource) {
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$errorCode = ldap_errno($resource);
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if($errorCode === 0) {
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return;
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}
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$errorMsg = ldap_error($resource);
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if($this->curFunc === 'ldap_get_entries'
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&& $errorCode === -4) {
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} else if ($errorCode === 32) {
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//for now
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} else if ($errorCode === 10) {
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//referrals, we switch them off, but then there is AD :)
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} else if ($errorCode === -1) {
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throw new ServerNotAvailableException('Lost connection to LDAP server.');
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} else if ($errorCode === 52) {
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throw new ServerNotAvailableException('LDAP server is shutting down.');
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} else if ($errorCode === 48) {
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throw new \Exception('LDAP authentication method rejected', $errorCode);
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} else if ($errorCode === 1) {
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throw new \Exception('LDAP Operations error', $errorCode);
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} else if ($errorCode === 19) {
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ldap_get_option($this->curArgs[0], LDAP_OPT_ERROR_STRING, $extended_error);
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throw new ConstraintViolationException(!empty($extended_error)?$extended_error:$errorMsg, $errorCode);
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} else {
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\OC::$server->getLogger()->debug('LDAP error {message} ({code}) after calling {func}', [
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'app' => 'user_ldap',
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'message' => $errorMsg,
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'code' => $errorCode,
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'func' => $this->curFunc,
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]);
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}
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}
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/**
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* Called after an ldap method is run to act on LDAP error if necessary
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* @throw \Exception
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*/
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private function postFunctionCall() {
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if($this->isResource($this->curArgs[0])) {
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$resource = $this->curArgs[0];
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} else if(
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$this->curFunc === 'ldap_search'
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&& is_array($this->curArgs[0])
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&& $this->isResource($this->curArgs[0][0])
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) {
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// we use always the same LDAP connection resource, is enough to
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// take the first one.
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$resource = $this->curArgs[0][0];
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} else {
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return;
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}
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$this->processLDAPError($resource);
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$this->curFunc = '';
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$this->curArgs = [];
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}
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}
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