1540 lines
49 KiB
PHP
1540 lines
49 KiB
PHP
<?php
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/**
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* @author Alexander Bergolth <leo@strike.wu.ac.at>
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* @author Andreas Fischer <bantu@owncloud.com>
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* @author Arthur Schiwon <blizzz@owncloud.com>
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Benjamin Diele <benjamin@diele.be>
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* @author Christopher Schäpers <kondou@ts.unde.re>
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* @author Donald Buczek <buczek@molgen.mpg.de>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lorenzo M. Catucci <lorenzo@sancho.ccd.uniroma2.it>
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* @author Lukas Reschke <lukas@owncloud.com>
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* @author Lyonel Vincent <lyonel@ezix.org>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin McCorkell <rmccorkell@karoshi.org.uk>
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* @author Scrutinizer Auto-Fixer <auto-fixer@scrutinizer-ci.com>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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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\lib;
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use OCA\User_LDAP\Mapping\AbstractMapping;
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/**
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* Class Access
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* @package OCA\user_ldap\lib
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*/
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class Access extends LDAPUtility implements user\IUserTools {
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/**
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* @var \OCA\user_ldap\lib\Connection
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*/
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public $connection;
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public $userManager;
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//never ever check this var directly, always use getPagedSearchResultState
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protected $pagedSearchedSuccessful;
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/**
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* @var string[] $cookies an array of returned Paged Result cookies
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*/
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protected $cookies = array();
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/**
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* @var string $lastCookie the last cookie returned from a Paged Results
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* operation, defaults to an empty string
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*/
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protected $lastCookie = '';
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/**
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* @var AbstractMapping $userMapper
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*/
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protected $userMapper;
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/**
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* @var AbstractMapping $userMapper
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*/
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protected $groupMapper;
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public function __construct(Connection $connection, ILDAPWrapper $ldap,
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user\Manager $userManager) {
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parent::__construct($ldap);
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$this->connection = $connection;
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$this->userManager = $userManager;
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$this->userManager->setLdapAccess($this);
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}
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/**
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* sets the User Mapper
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* @param AbstractMapping $mapper
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*/
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public function setUserMapper(AbstractMapping $mapper) {
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$this->userMapper = $mapper;
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}
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/**
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* returns the User Mapper
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* @throws \Exception
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* @return AbstractMapping
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*/
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public function getUserMapper() {
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if(is_null($this->userMapper)) {
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throw new \Exception('UserMapper was not assigned to this Access instance.');
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}
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return $this->userMapper;
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}
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/**
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* sets the Group Mapper
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* @param AbstractMapping $mapper
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*/
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public function setGroupMapper(AbstractMapping $mapper) {
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$this->groupMapper = $mapper;
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}
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/**
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* returns the Group Mapper
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* @throws \Exception
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* @return AbstractMapping
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*/
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public function getGroupMapper() {
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if(is_null($this->groupMapper)) {
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throw new \Exception('GroupMapper was not assigned to this Access instance.');
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}
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return $this->groupMapper;
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}
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/**
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* @return bool
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*/
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private function checkConnection() {
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return ($this->connection instanceof Connection);
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}
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/**
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* returns the Connection instance
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* @return \OCA\user_ldap\lib\Connection
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*/
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public function getConnection() {
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return $this->connection;
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}
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/**
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* reads a given attribute for an LDAP record identified by a DN
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* @param string $dn the record in question
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* @param string $attr the attribute that shall be retrieved
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* if empty, just check the record's existence
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* @param string $filter
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* @return array|false an array of values on success or an empty
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* array if $attr is empty, false otherwise
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*/
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public function readAttribute($dn, $attr, $filter = 'objectClass=*') {
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if(!$this->checkConnection()) {
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\OCP\Util::writeLog('user_ldap',
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'No LDAP Connector assigned, access impossible for readAttribute.',
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\OCP\Util::WARN);
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return false;
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}
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$cr = $this->connection->getConnectionResource();
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if(!$this->ldap->isResource($cr)) {
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//LDAP not available
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\OCP\Util::writeLog('user_ldap', 'LDAP resource not available.', \OCP\Util::DEBUG);
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return false;
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}
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//Cancel possibly running Paged Results operation, otherwise we run in
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//LDAP protocol errors
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$this->abandonPagedSearch();
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// openLDAP requires that we init a new Paged Search. Not needed by AD,
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// but does not hurt either.
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$pagingSize = intval($this->connection->ldapPagingSize);
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// 0 won't result in replies, small numbers may leave out groups
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// (cf. #12306), 500 is default for paging and should work everywhere.
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$maxResults = $pagingSize > 20 ? $pagingSize : 500;
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$this->initPagedSearch($filter, array($dn), array($attr), $maxResults, 0);
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$dn = $this->DNasBaseParameter($dn);
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$rr = @$this->ldap->read($cr, $dn, $filter, array($attr));
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if(!$this->ldap->isResource($rr)) {
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if(!empty($attr)) {
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//do not throw this message on userExists check, irritates
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\OCP\Util::writeLog('user_ldap', 'readAttribute failed for DN '.$dn, \OCP\Util::DEBUG);
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}
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//in case an error occurs , e.g. object does not exist
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return false;
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}
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if (empty($attr)) {
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\OCP\Util::writeLog('user_ldap', 'readAttribute: '.$dn.' found', \OCP\Util::DEBUG);
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return array();
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}
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$er = $this->ldap->firstEntry($cr, $rr);
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if(!$this->ldap->isResource($er)) {
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//did not match the filter, return false
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return false;
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}
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//LDAP attributes are not case sensitive
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$result = \OCP\Util::mb_array_change_key_case(
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$this->ldap->getAttributes($cr, $er), MB_CASE_LOWER, 'UTF-8');
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$attr = mb_strtolower($attr, 'UTF-8');
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if(isset($result[$attr]) && $result[$attr]['count'] > 0) {
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$values = array();
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for($i=0;$i<$result[$attr]['count'];$i++) {
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if($this->resemblesDN($attr)) {
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$values[] = $this->sanitizeDN($result[$attr][$i]);
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} elseif(strtolower($attr) === 'objectguid' || strtolower($attr) === 'guid') {
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$values[] = $this->convertObjectGUID2Str($result[$attr][$i]);
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} else {
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$values[] = $result[$attr][$i];
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}
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}
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return $values;
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}
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\OCP\Util::writeLog('user_ldap', 'Requested attribute '.$attr.' not found for '.$dn, \OCP\Util::DEBUG);
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return false;
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}
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/**
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* checks whether the given attributes value is probably a DN
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* @param string $attr the attribute in question
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* @return boolean if so true, otherwise false
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*/
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private function resemblesDN($attr) {
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$resemblingAttributes = array(
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'dn',
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'uniquemember',
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'member'
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);
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return in_array($attr, $resemblingAttributes);
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}
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/**
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* checks whether the given string is probably a DN
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* @param string $string
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* @return boolean
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*/
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public function stringResemblesDN($string) {
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$r = $this->ldap->explodeDN($string, 0);
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// if exploding a DN succeeds and does not end up in
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// an empty array except for $r[count] being 0.
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return (is_array($r) && count($r) > 1);
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}
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/**
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* sanitizes a DN received from the LDAP server
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* @param array $dn the DN in question
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* @return array the sanitized DN
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*/
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private function sanitizeDN($dn) {
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//treating multiple base DNs
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if(is_array($dn)) {
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$result = array();
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foreach($dn as $singleDN) {
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$result[] = $this->sanitizeDN($singleDN);
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}
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return $result;
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}
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//OID sometimes gives back DNs with whitespace after the comma
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// a la "uid=foo, cn=bar, dn=..." We need to tackle this!
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$dn = preg_replace('/([^\\\]),(\s+)/u', '\1,', $dn);
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//make comparisons and everything work
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$dn = mb_strtolower($dn, 'UTF-8');
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//escape DN values according to RFC 2253 – this is already done by ldap_explode_dn
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//to use the DN in search filters, \ needs to be escaped to \5c additionally
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//to use them in bases, we convert them back to simple backslashes in readAttribute()
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$replacements = array(
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'\,' => '\5c2C',
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'\=' => '\5c3D',
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'\+' => '\5c2B',
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'\<' => '\5c3C',
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'\>' => '\5c3E',
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'\;' => '\5c3B',
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'\"' => '\5c22',
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'\#' => '\5c23',
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'(' => '\28',
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')' => '\29',
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'*' => '\2A',
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);
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$dn = str_replace(array_keys($replacements), array_values($replacements), $dn);
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return $dn;
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}
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/**
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* returns a DN-string that is cleaned from not domain parts, e.g.
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* cn=foo,cn=bar,dc=foobar,dc=server,dc=org
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* becomes dc=foobar,dc=server,dc=org
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* @param string $dn
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* @return string
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*/
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public function getDomainDNFromDN($dn) {
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$allParts = $this->ldap->explodeDN($dn, 0);
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if($allParts === false) {
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//not a valid DN
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return '';
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}
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$domainParts = array();
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$dcFound = false;
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foreach($allParts as $part) {
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if(!$dcFound && strpos($part, 'dc=') === 0) {
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$dcFound = true;
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}
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if($dcFound) {
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$domainParts[] = $part;
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}
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}
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$domainDN = implode(',', $domainParts);
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return $domainDN;
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}
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/**
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* returns the LDAP DN for the given internal ownCloud name of the group
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* @param string $name the ownCloud name in question
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* @return string|false LDAP DN on success, otherwise false
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*/
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public function groupname2dn($name) {
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return $this->groupMapper->getDNbyName($name);
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}
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/**
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* returns the LDAP DN for the given internal ownCloud name of the user
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* @param string $name the ownCloud name in question
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* @return string|false with the LDAP DN on success, otherwise false
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*/
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public function username2dn($name) {
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$fdn = $this->userMapper->getDNbyName($name);
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//Check whether the DN belongs to the Base, to avoid issues on multi-
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//server setups
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if(is_string($fdn) && $this->isDNPartOfBase($fdn, $this->connection->ldapBaseUsers)) {
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return $fdn;
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}
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return false;
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}
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/**
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public function ocname2dn($name, $isUser) {
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* returns the internal ownCloud name for the given LDAP DN of the group, false on DN outside of search DN or failure
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* @param string $fdn the dn of the group object
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* @param string $ldapName optional, the display name of the object
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* @return string|false with the name to use in ownCloud, false on DN outside of search DN
|
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*/
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public function dn2groupname($fdn, $ldapName = null) {
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//To avoid bypassing the base DN settings under certain circumstances
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//with the group support, check whether the provided DN matches one of
|
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//the given Bases
|
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if(!$this->isDNPartOfBase($fdn, $this->connection->ldapBaseGroups)) {
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return false;
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}
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return $this->dn2ocname($fdn, $ldapName, false);
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}
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/**
|
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* accepts an array of group DNs and tests whether they match the user
|
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* filter by doing read operations against the group entries. Returns an
|
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* array of DNs that match the filter.
|
||
*
|
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* @param string[] $groupDNs
|
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* @return string[]
|
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*/
|
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public function groupsMatchFilter($groupDNs) {
|
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$validGroupDNs = [];
|
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foreach($groupDNs as $dn) {
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$cacheKey = 'groupsMatchFilter-'.$dn;
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if($this->connection->isCached($cacheKey)) {
|
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if($this->connection->getFromCache($cacheKey)) {
|
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$validGroupDNs[] = $dn;
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}
|
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continue;
|
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}
|
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|
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// Check the base DN first. If this is not met already, we don't
|
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// need to ask the server at all.
|
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if(!$this->isDNPartOfBase($dn, $this->connection->ldapBaseGroups)) {
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$this->connection->writeToCache($cacheKey, false);
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continue;
|
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}
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|
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$result = $this->readAttribute($dn, 'cn', $this->connection->ldapGroupFilter);
|
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if(is_array($result)) {
|
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$this->connection->writeToCache($cacheKey, true);
|
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$validGroupDNs[] = $dn;
|
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} else {
|
||
$this->connection->writeToCache($cacheKey, false);
|
||
}
|
||
|
||
}
|
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return $validGroupDNs;
|
||
}
|
||
|
||
/**
|
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* returns the internal ownCloud name for the given LDAP DN of the user, false on DN outside of search DN or failure
|
||
* @param string $dn the dn of the user object
|
||
* @param string $ldapName optional, the display name of the object
|
||
* @return string|false with with the name to use in ownCloud
|
||
*/
|
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public function dn2username($fdn, $ldapName = null) {
|
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//To avoid bypassing the base DN settings under certain circumstances
|
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//with the group support, check whether the provided DN matches one of
|
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//the given Bases
|
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if(!$this->isDNPartOfBase($fdn, $this->connection->ldapBaseUsers)) {
|
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return false;
|
||
}
|
||
|
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return $this->dn2ocname($fdn, $ldapName, true);
|
||
}
|
||
|
||
/**
|
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* returns an internal ownCloud name for the given LDAP DN, false on DN outside of search DN
|
||
* @param string $dn the dn of the user object
|
||
* @param string $ldapName optional, the display name of the object
|
||
* @param bool $isUser optional, whether it is a user object (otherwise group assumed)
|
||
* @return string|false with with the name to use in ownCloud
|
||
*/
|
||
public function dn2ocname($fdn, $ldapName = null, $isUser = true) {
|
||
if($isUser) {
|
||
$mapper = $this->getUserMapper();
|
||
$nameAttribute = $this->connection->ldapUserDisplayName;
|
||
} else {
|
||
$mapper = $this->getGroupMapper();
|
||
$nameAttribute = $this->connection->ldapGroupDisplayName;
|
||
}
|
||
|
||
//let's try to retrieve the ownCloud name from the mappings table
|
||
$ocName = $mapper->getNameByDN($fdn);
|
||
if(is_string($ocName)) {
|
||
return $ocName;
|
||
}
|
||
|
||
//second try: get the UUID and check if it is known. Then, update the DN and return the name.
|
||
$uuid = $this->getUUID($fdn, $isUser);
|
||
if(is_string($uuid)) {
|
||
$ocName = $mapper->getNameByUUID($uuid);
|
||
if(is_string($ocName)) {
|
||
$mapper->setDNbyUUID($fdn, $uuid);
|
||
return $ocName;
|
||
}
|
||
} else {
|
||
//If the UUID can't be detected something is foul.
|
||
\OCP\Util::writeLog('user_ldap', 'Cannot determine UUID for '.$fdn.'. Skipping.', \OCP\Util::INFO);
|
||
return false;
|
||
}
|
||
|
||
if(is_null($ldapName)) {
|
||
$ldapName = $this->readAttribute($fdn, $nameAttribute);
|
||
if(!isset($ldapName[0]) && empty($ldapName[0])) {
|
||
\OCP\Util::writeLog('user_ldap', 'No or empty name for '.$fdn.'.', \OCP\Util::INFO);
|
||
return false;
|
||
}
|
||
$ldapName = $ldapName[0];
|
||
}
|
||
|
||
if($isUser) {
|
||
$usernameAttribute = $this->connection->ldapExpertUsernameAttr;
|
||
if(!empty($usernameAttribute)) {
|
||
$username = $this->readAttribute($fdn, $usernameAttribute);
|
||
$username = $username[0];
|
||
} else {
|
||
$username = $uuid;
|
||
}
|
||
$intName = $this->sanitizeUsername($username);
|
||
} else {
|
||
$intName = $ldapName;
|
||
}
|
||
|
||
//a new user/group! Add it only if it doesn't conflict with other backend's users or existing groups
|
||
//disabling Cache is required to avoid that the new user is cached as not-existing in fooExists check
|
||
//NOTE: mind, disabling cache affects only this instance! Using it
|
||
// outside of core user management will still cache the user as non-existing.
|
||
$originalTTL = $this->connection->ldapCacheTTL;
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => 0));
|
||
if(($isUser && !\OCP\User::userExists($intName))
|
||
|| (!$isUser && !\OC_Group::groupExists($intName))) {
|
||
if($mapper->map($fdn, $intName, $uuid)) {
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => $originalTTL));
|
||
return $intName;
|
||
}
|
||
}
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => $originalTTL));
|
||
|
||
$altName = $this->createAltInternalOwnCloudName($intName, $isUser);
|
||
if(is_string($altName) && $mapper->map($fdn, $altName, $uuid)) {
|
||
return $altName;
|
||
}
|
||
|
||
//if everything else did not help..
|
||
\OCP\Util::writeLog('user_ldap', 'Could not create unique name for '.$fdn.'.', \OCP\Util::INFO);
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* gives back the user names as they are used ownClod internally
|
||
* @param array $ldapUsers an array with the ldap Users result in style of array ( array ('dn' => foo, 'uid' => bar), ... )
|
||
* @return array an array with the user names to use in ownCloud
|
||
*
|
||
* gives back the user names as they are used ownClod internally
|
||
*/
|
||
public function ownCloudUserNames($ldapUsers) {
|
||
return $this->ldap2ownCloudNames($ldapUsers, true);
|
||
}
|
||
|
||
/**
|
||
* gives back the group names as they are used ownClod internally
|
||
* @param array $ldapGroups an array with the ldap Groups result in style of array ( array ('dn' => foo, 'cn' => bar), ... )
|
||
* @return array an array with the group names to use in ownCloud
|
||
*
|
||
* gives back the group names as they are used ownClod internally
|
||
*/
|
||
public function ownCloudGroupNames($ldapGroups) {
|
||
return $this->ldap2ownCloudNames($ldapGroups, false);
|
||
}
|
||
|
||
/**
|
||
* @param array $ldapObjects
|
||
* @param bool $isUsers
|
||
* @return array
|
||
*/
|
||
private function ldap2ownCloudNames($ldapObjects, $isUsers) {
|
||
if($isUsers) {
|
||
$nameAttribute = $this->connection->ldapUserDisplayName;
|
||
} else {
|
||
$nameAttribute = $this->connection->ldapGroupDisplayName;
|
||
}
|
||
$ownCloudNames = array();
|
||
|
||
foreach($ldapObjects as $ldapObject) {
|
||
$nameByLDAP = isset($ldapObject[$nameAttribute]) ? $ldapObject[$nameAttribute] : null;
|
||
$ocName = $this->dn2ocname($ldapObject['dn'], $nameByLDAP, $isUsers);
|
||
if($ocName) {
|
||
$ownCloudNames[] = $ocName;
|
||
if($isUsers) {
|
||
//cache the user names so it does not need to be retrieved
|
||
//again later (e.g. sharing dialogue).
|
||
$this->cacheUserExists($ocName);
|
||
$this->cacheUserDisplayName($ocName, $nameByLDAP);
|
||
}
|
||
}
|
||
continue;
|
||
}
|
||
return $ownCloudNames;
|
||
}
|
||
|
||
/**
|
||
* caches a user as existing
|
||
* @param string $ocName the internal ownCloud username
|
||
*/
|
||
public function cacheUserExists($ocName) {
|
||
$this->connection->writeToCache('userExists'.$ocName, true);
|
||
}
|
||
|
||
/**
|
||
* caches the user display name
|
||
* @param string $ocName the internal ownCloud username
|
||
* @param string $displayName the display name
|
||
*/
|
||
public function cacheUserDisplayName($ocName, $displayName) {
|
||
$cacheKeyTrunk = 'getDisplayName';
|
||
$this->connection->writeToCache($cacheKeyTrunk.$ocName, $displayName);
|
||
}
|
||
|
||
/**
|
||
* creates a unique name for internal ownCloud use for users. Don't call it directly.
|
||
* @param string $name the display name of the object
|
||
* @return string|false with with the name to use in ownCloud or false if unsuccessful
|
||
*
|
||
* Instead of using this method directly, call
|
||
* createAltInternalOwnCloudName($name, true)
|
||
*/
|
||
private function _createAltInternalOwnCloudNameForUsers($name) {
|
||
$attempts = 0;
|
||
//while loop is just a precaution. If a name is not generated within
|
||
//20 attempts, something else is very wrong. Avoids infinite loop.
|
||
while($attempts < 20){
|
||
$altName = $name . '_' . rand(1000,9999);
|
||
if(!\OCP\User::userExists($altName)) {
|
||
return $altName;
|
||
}
|
||
$attempts++;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* creates a unique name for internal ownCloud use for groups. Don't call it directly.
|
||
* @param string $name the display name of the object
|
||
* @return string|false with with the name to use in ownCloud or false if unsuccessful.
|
||
*
|
||
* Instead of using this method directly, call
|
||
* createAltInternalOwnCloudName($name, false)
|
||
*
|
||
* Group names are also used as display names, so we do a sequential
|
||
* numbering, e.g. Developers_42 when there are 41 other groups called
|
||
* "Developers"
|
||
*/
|
||
private function _createAltInternalOwnCloudNameForGroups($name) {
|
||
$usedNames = $this->groupMapper->getNamesBySearch($name.'_%');
|
||
if(!($usedNames) || count($usedNames) === 0) {
|
||
$lastNo = 1; //will become name_2
|
||
} else {
|
||
natsort($usedNames);
|
||
$lastName = array_pop($usedNames);
|
||
$lastNo = intval(substr($lastName, strrpos($lastName, '_') + 1));
|
||
}
|
||
$altName = $name.'_'.strval($lastNo+1);
|
||
unset($usedNames);
|
||
|
||
$attempts = 1;
|
||
while($attempts < 21){
|
||
// Check to be really sure it is unique
|
||
// while loop is just a precaution. If a name is not generated within
|
||
// 20 attempts, something else is very wrong. Avoids infinite loop.
|
||
if(!\OC_Group::groupExists($altName)) {
|
||
return $altName;
|
||
}
|
||
$altName = $name . '_' . ($lastNo + $attempts);
|
||
$attempts++;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* creates a unique name for internal ownCloud use.
|
||
* @param string $name the display name of the object
|
||
* @param boolean $isUser whether name should be created for a user (true) or a group (false)
|
||
* @return string|false with with the name to use in ownCloud or false if unsuccessful
|
||
*/
|
||
private function createAltInternalOwnCloudName($name, $isUser) {
|
||
$originalTTL = $this->connection->ldapCacheTTL;
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => 0));
|
||
if($isUser) {
|
||
$altName = $this->_createAltInternalOwnCloudNameForUsers($name);
|
||
} else {
|
||
$altName = $this->_createAltInternalOwnCloudNameForGroups($name);
|
||
}
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => $originalTTL));
|
||
|
||
return $altName;
|
||
}
|
||
|
||
/**
|
||
* fetches a list of users according to a provided loginName and utilizing
|
||
* the login filter.
|
||
*
|
||
* @param string $loginName
|
||
* @param array $attributes optional, list of attributes to read
|
||
* @return array
|
||
*/
|
||
public function fetchUsersByLoginName($loginName, $attributes = array('dn')) {
|
||
$loginName = $this->escapeFilterPart($loginName);
|
||
$filter = str_replace('%uid', $loginName, $this->connection->ldapLoginFilter);
|
||
$users = $this->fetchListOfUsers($filter, $attributes);
|
||
return $users;
|
||
}
|
||
|
||
/**
|
||
* @param string $filter
|
||
* @param string|string[] $attr
|
||
* @param int $limit
|
||
* @param int $offset
|
||
* @return array
|
||
*/
|
||
public function fetchListOfUsers($filter, $attr, $limit = null, $offset = null) {
|
||
return $this->fetchList($this->searchUsers($filter, $attr, $limit, $offset), (count($attr) > 1));
|
||
}
|
||
|
||
/**
|
||
* @param string $filter
|
||
* @param string|string[] $attr
|
||
* @param int $limit
|
||
* @param int $offset
|
||
* @return array
|
||
*/
|
||
public function fetchListOfGroups($filter, $attr, $limit = null, $offset = null) {
|
||
return $this->fetchList($this->searchGroups($filter, $attr, $limit, $offset), (count($attr) > 1));
|
||
}
|
||
|
||
/**
|
||
* @param array $list
|
||
* @param bool $manyAttributes
|
||
* @return array
|
||
*/
|
||
private function fetchList($list, $manyAttributes) {
|
||
if(is_array($list)) {
|
||
if($manyAttributes) {
|
||
return $list;
|
||
} else {
|
||
return array_unique($list, SORT_LOCALE_STRING);
|
||
}
|
||
}
|
||
|
||
//error cause actually, maybe throw an exception in future.
|
||
return array();
|
||
}
|
||
|
||
/**
|
||
* executes an LDAP search, optimized for Users
|
||
* @param string $filter the LDAP filter for the search
|
||
* @param string|string[] $attr optional, when a certain attribute shall be filtered out
|
||
* @param integer $limit
|
||
* @param integer $offset
|
||
* @return array with the search result
|
||
*
|
||
* Executes an LDAP search
|
||
*/
|
||
public function searchUsers($filter, $attr = null, $limit = null, $offset = null) {
|
||
return $this->search($filter, $this->connection->ldapBaseUsers, $attr, $limit, $offset);
|
||
}
|
||
|
||
/**
|
||
* @param string $filter
|
||
* @param string|string[] $attr
|
||
* @param int $limit
|
||
* @param int $offset
|
||
* @return false|int
|
||
*/
|
||
public function countUsers($filter, $attr = array('dn'), $limit = null, $offset = null) {
|
||
return $this->count($filter, $this->connection->ldapBaseUsers, $attr, $limit, $offset);
|
||
}
|
||
|
||
/**
|
||
* executes an LDAP search, optimized for Groups
|
||
* @param string $filter the LDAP filter for the search
|
||
* @param string|string[] $attr optional, when a certain attribute shall be filtered out
|
||
* @param integer $limit
|
||
* @param integer $offset
|
||
* @return array with the search result
|
||
*
|
||
* Executes an LDAP search
|
||
*/
|
||
public function searchGroups($filter, $attr = null, $limit = null, $offset = null) {
|
||
return $this->search($filter, $this->connection->ldapBaseGroups, $attr, $limit, $offset);
|
||
}
|
||
|
||
/**
|
||
* returns the number of available groups
|
||
* @param string $filter the LDAP search filter
|
||
* @param string[] $attr optional
|
||
* @param int|null $limit
|
||
* @param int|null $offset
|
||
* @return int|bool
|
||
*/
|
||
public function countGroups($filter, $attr = array('dn'), $limit = null, $offset = null) {
|
||
return $this->count($filter, $this->connection->ldapBaseGroups, $attr, $limit, $offset);
|
||
}
|
||
|
||
/**
|
||
* returns the number of available objects on the base DN
|
||
*
|
||
* @param int|null $limit
|
||
* @param int|null $offset
|
||
* @return int|bool
|
||
*/
|
||
public function countObjects($limit = null, $offset = null) {
|
||
return $this->count('objectclass=*', $this->connection->ldapBase, array('dn'), $limit, $offset);
|
||
}
|
||
|
||
/**
|
||
* retrieved. Results will according to the order in the array.
|
||
* @param int $limit optional, maximum results to be counted
|
||
* @param int $offset optional, a starting point
|
||
* @return array|false array with the search result as first value and pagedSearchOK as
|
||
* second | false if not successful
|
||
*/
|
||
private function executeSearch($filter, $base, &$attr = null, $limit = null, $offset = null) {
|
||
if(!is_null($attr) && !is_array($attr)) {
|
||
$attr = array(mb_strtolower($attr, 'UTF-8'));
|
||
}
|
||
|
||
// See if we have a resource, in case not cancel with message
|
||
$cr = $this->connection->getConnectionResource();
|
||
if(!$this->ldap->isResource($cr)) {
|
||
// Seems like we didn't find any resource.
|
||
// Return an empty array just like before.
|
||
\OCP\Util::writeLog('user_ldap', 'Could not search, because resource is missing.', \OCP\Util::DEBUG);
|
||
return false;
|
||
}
|
||
|
||
//check whether paged search should be attempted
|
||
$pagedSearchOK = $this->initPagedSearch($filter, $base, $attr, intval($limit), $offset);
|
||
|
||
$linkResources = array_pad(array(), count($base), $cr);
|
||
$sr = $this->ldap->search($linkResources, $base, $filter, $attr);
|
||
$error = $this->ldap->errno($cr);
|
||
if(!is_array($sr) || $error !== 0) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'Error when searching: '.$this->ldap->error($cr).
|
||
' code '.$this->ldap->errno($cr),
|
||
\OCP\Util::ERROR);
|
||
\OCP\Util::writeLog('user_ldap', 'Attempt for Paging? '.print_r($pagedSearchOK, true), \OCP\Util::ERROR);
|
||
return false;
|
||
}
|
||
|
||
return array($sr, $pagedSearchOK);
|
||
}
|
||
|
||
/**
|
||
* processes an LDAP paged search operation
|
||
* @param array $sr the array containing the LDAP search resources
|
||
* @param string $filter the LDAP filter for the search
|
||
* @param array $base an array containing the LDAP subtree(s) that shall be searched
|
||
* @param int $iFoundItems number of results in the search operation
|
||
* @param int $limit maximum results to be counted
|
||
* @param int $offset a starting point
|
||
* @param bool $pagedSearchOK whether a paged search has been executed
|
||
* @param bool $skipHandling required for paged search when cookies to
|
||
* prior results need to be gained
|
||
* @return array|false array with the search result as first value and pagedSearchOK as
|
||
* second | false if not successful
|
||
*/
|
||
private function processPagedSearchStatus($sr, $filter, $base, $iFoundItems, $limit, $offset, $pagedSearchOK, $skipHandling) {
|
||
if($pagedSearchOK) {
|
||
$cr = $this->connection->getConnectionResource();
|
||
foreach($sr as $key => $res) {
|
||
$cookie = null;
|
||
if($this->ldap->controlPagedResultResponse($cr, $res, $cookie)) {
|
||
$this->setPagedResultCookie($base[$key], $filter, $limit, $offset, $cookie);
|
||
}
|
||
}
|
||
|
||
//browsing through prior pages to get the cookie for the new one
|
||
if($skipHandling) {
|
||
return;
|
||
}
|
||
// if count is bigger, then the server does not support
|
||
// paged search. Instead, he did a normal search. We set a
|
||
// flag here, so the callee knows how to deal with it.
|
||
if($iFoundItems <= $limit) {
|
||
$this->pagedSearchedSuccessful = true;
|
||
}
|
||
} else {
|
||
if(!is_null($limit)) {
|
||
\OCP\Util::writeLog('user_ldap', 'Paged search was not available', \OCP\Util::INFO);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* executes an LDAP search, but counts the results only
|
||
* @param string $filter the LDAP filter for the search
|
||
* @param array $base an array containing the LDAP subtree(s) that shall be searched
|
||
* @param string|string[] $attr optional, array, one or more attributes that shall be
|
||
* retrieved. Results will according to the order in the array.
|
||
* @param int $limit optional, maximum results to be counted
|
||
* @param int $offset optional, a starting point
|
||
* @param bool $skipHandling indicates whether the pages search operation is
|
||
* completed
|
||
* @return int|false Integer or false if the search could not be initialized
|
||
*
|
||
*/
|
||
private function count($filter, $base, $attr = null, $limit = null, $offset = null, $skipHandling = false) {
|
||
\OCP\Util::writeLog('user_ldap', 'Count filter: '.print_r($filter, true), \OCP\Util::DEBUG);
|
||
|
||
$limitPerPage = intval($this->connection->ldapPagingSize);
|
||
if(!is_null($limit) && $limit < $limitPerPage && $limit > 0) {
|
||
$limitPerPage = $limit;
|
||
}
|
||
|
||
$counter = 0;
|
||
$count = null;
|
||
$this->connection->getConnectionResource();
|
||
|
||
do {
|
||
$continue = false;
|
||
$search = $this->executeSearch($filter, $base, $attr,
|
||
$limitPerPage, $offset);
|
||
if($search === false) {
|
||
return $counter > 0 ? $counter : false;
|
||
}
|
||
list($sr, $pagedSearchOK) = $search;
|
||
|
||
$count = $this->countEntriesInSearchResults($sr, $limitPerPage, $continue);
|
||
$counter += $count;
|
||
|
||
$this->processPagedSearchStatus($sr, $filter, $base, $count, $limitPerPage,
|
||
$offset, $pagedSearchOK, $skipHandling);
|
||
$offset += $limitPerPage;
|
||
} while($continue && (is_null($limit) || $limit <= 0 || $limit > $counter));
|
||
|
||
return $counter;
|
||
}
|
||
|
||
/**
|
||
* @param array $searchResults
|
||
* @param int $limit
|
||
* @param bool $hasHitLimit
|
||
* @return int
|
||
*/
|
||
private function countEntriesInSearchResults($searchResults, $limit, &$hasHitLimit) {
|
||
$cr = $this->connection->getConnectionResource();
|
||
$counter = 0;
|
||
|
||
foreach($searchResults as $res) {
|
||
$count = intval($this->ldap->countEntries($cr, $res));
|
||
$counter += $count;
|
||
if($count > 0 && $count === $limit) {
|
||
$hasHitLimit = true;
|
||
}
|
||
}
|
||
|
||
return $counter;
|
||
}
|
||
|
||
/**
|
||
* Executes an LDAP search
|
||
* @param string $filter the LDAP filter for the search
|
||
* @param array $base an array containing the LDAP subtree(s) that shall be searched
|
||
* @param string|string[] $attr optional, array, one or more attributes that shall be
|
||
* @param int $limit
|
||
* @param int $offset
|
||
* @param bool $skipHandling
|
||
* @return array with the search result
|
||
*/
|
||
private function search($filter, $base, $attr = null, $limit = null, $offset = null, $skipHandling = false) {
|
||
if($limit <= 0) {
|
||
//otherwise search will fail
|
||
$limit = null;
|
||
}
|
||
$search = $this->executeSearch($filter, $base, $attr, $limit, $offset);
|
||
if($search === false) {
|
||
return array();
|
||
}
|
||
list($sr, $pagedSearchOK) = $search;
|
||
$cr = $this->connection->getConnectionResource();
|
||
|
||
if($skipHandling) {
|
||
//i.e. result do not need to be fetched, we just need the cookie
|
||
//thus pass 1 or any other value as $iFoundItems because it is not
|
||
//used
|
||
$this->processPagedSearchStatus($sr, $filter, $base, 1, $limit,
|
||
$offset, $pagedSearchOK,
|
||
$skipHandling);
|
||
return array();
|
||
}
|
||
|
||
// Do the server-side sorting
|
||
foreach(array_reverse($attr) as $sortAttr){
|
||
foreach($sr as $searchResource) {
|
||
$this->ldap->sort($cr, $searchResource, $sortAttr);
|
||
}
|
||
}
|
||
|
||
$findings = array();
|
||
foreach($sr as $res) {
|
||
$findings = array_merge($findings, $this->ldap->getEntries($cr , $res ));
|
||
}
|
||
|
||
$this->processPagedSearchStatus($sr, $filter, $base, $findings['count'],
|
||
$limit, $offset, $pagedSearchOK,
|
||
$skipHandling);
|
||
|
||
// if we're here, probably no connection resource is returned.
|
||
// to make ownCloud behave nicely, we simply give back an empty array.
|
||
if(is_null($findings)) {
|
||
return array();
|
||
}
|
||
|
||
if(!is_null($attr)) {
|
||
$selection = array();
|
||
$multiArray = false;
|
||
if(count($attr) > 1) {
|
||
$multiArray = true;
|
||
$i = 0;
|
||
}
|
||
foreach($findings as $item) {
|
||
if(!is_array($item)) {
|
||
continue;
|
||
}
|
||
$item = \OCP\Util::mb_array_change_key_case($item, MB_CASE_LOWER, 'UTF-8');
|
||
|
||
if($multiArray) {
|
||
foreach($attr as $key) {
|
||
$key = mb_strtolower($key, 'UTF-8');
|
||
if(isset($item[$key])) {
|
||
if($key !== 'dn') {
|
||
$selection[$i][$key] = $this->resemblesDN($key) ?
|
||
$this->sanitizeDN($item[$key][0])
|
||
: $item[$key][0];
|
||
} else {
|
||
$selection[$i][$key] = $this->sanitizeDN($item[$key]);
|
||
}
|
||
}
|
||
|
||
}
|
||
$i++;
|
||
} else {
|
||
//tribute to case insensitivity
|
||
$key = mb_strtolower($attr[0], 'UTF-8');
|
||
|
||
if(isset($item[$key])) {
|
||
if($this->resemblesDN($key)) {
|
||
$selection[] = $this->sanitizeDN($item[$key]);
|
||
} else {
|
||
$selection[] = $item[$key];
|
||
}
|
||
}
|
||
}
|
||
}
|
||
$findings = $selection;
|
||
}
|
||
//we slice the findings, when
|
||
//a) paged search unsuccessful, though attempted
|
||
//b) no paged search, but limit set
|
||
if((!$this->getPagedSearchResultState()
|
||
&& $pagedSearchOK)
|
||
|| (
|
||
!$pagedSearchOK
|
||
&& !is_null($limit)
|
||
)
|
||
) {
|
||
$findings = array_slice($findings, intval($offset), $limit);
|
||
}
|
||
return $findings;
|
||
}
|
||
|
||
/**
|
||
* @param string $name
|
||
* @return bool|mixed|string
|
||
*/
|
||
public function sanitizeUsername($name) {
|
||
if($this->connection->ldapIgnoreNamingRules) {
|
||
return $name;
|
||
}
|
||
|
||
// Transliteration
|
||
// latin characters to ASCII
|
||
$name = iconv('UTF-8', 'ASCII//TRANSLIT', $name);
|
||
|
||
// Replacements
|
||
$name = str_replace(' ', '_', $name);
|
||
|
||
// Every remaining disallowed characters will be removed
|
||
$name = preg_replace('/[^a-zA-Z0-9_.@-]/u', '', $name);
|
||
|
||
return $name;
|
||
}
|
||
|
||
/**
|
||
* escapes (user provided) parts for LDAP filter
|
||
* @param string $input, the provided value
|
||
* @param bool $allowAsterisk whether in * at the beginning should be preserved
|
||
* @return string the escaped string
|
||
*/
|
||
public function escapeFilterPart($input, $allowAsterisk = false) {
|
||
$asterisk = '';
|
||
if($allowAsterisk && strlen($input) > 0 && $input[0] === '*') {
|
||
$asterisk = '*';
|
||
$input = mb_substr($input, 1, null, 'UTF-8');
|
||
}
|
||
$search = array('*', '\\', '(', ')');
|
||
$replace = array('\\*', '\\\\', '\\(', '\\)');
|
||
return $asterisk . str_replace($search, $replace, $input);
|
||
}
|
||
|
||
/**
|
||
* combines the input filters with AND
|
||
* @param string[] $filters the filters to connect
|
||
* @return string the combined filter
|
||
*/
|
||
public function combineFilterWithAnd($filters) {
|
||
return $this->combineFilter($filters, '&');
|
||
}
|
||
|
||
/**
|
||
* combines the input filters with OR
|
||
* @param string[] $filters the filters to connect
|
||
* @return string the combined filter
|
||
* Combines Filter arguments with OR
|
||
*/
|
||
public function combineFilterWithOr($filters) {
|
||
return $this->combineFilter($filters, '|');
|
||
}
|
||
|
||
/**
|
||
* combines the input filters with given operator
|
||
* @param string[] $filters the filters to connect
|
||
* @param string $operator either & or |
|
||
* @return string the combined filter
|
||
*/
|
||
private function combineFilter($filters, $operator) {
|
||
$combinedFilter = '('.$operator;
|
||
foreach($filters as $filter) {
|
||
if(!empty($filter) && $filter[0] !== '(') {
|
||
$filter = '('.$filter.')';
|
||
}
|
||
$combinedFilter.=$filter;
|
||
}
|
||
$combinedFilter.=')';
|
||
return $combinedFilter;
|
||
}
|
||
|
||
/**
|
||
* creates a filter part for to perform search for users
|
||
* @param string $search the search term
|
||
* @return string the final filter part to use in LDAP searches
|
||
*/
|
||
public function getFilterPartForUserSearch($search) {
|
||
return $this->getFilterPartForSearch($search,
|
||
$this->connection->ldapAttributesForUserSearch,
|
||
$this->connection->ldapUserDisplayName);
|
||
}
|
||
|
||
/**
|
||
* creates a filter part for to perform search for groups
|
||
* @param string $search the search term
|
||
* @return string the final filter part to use in LDAP searches
|
||
*/
|
||
public function getFilterPartForGroupSearch($search) {
|
||
return $this->getFilterPartForSearch($search,
|
||
$this->connection->ldapAttributesForGroupSearch,
|
||
$this->connection->ldapGroupDisplayName);
|
||
}
|
||
|
||
/**
|
||
* creates a filter part for searches by splitting up the given search
|
||
* string into single words
|
||
* @param string $search the search term
|
||
* @param string[] $searchAttributes needs to have at least two attributes,
|
||
* otherwise it does not make sense :)
|
||
* @return string the final filter part to use in LDAP searches
|
||
* @throws \Exception
|
||
*/
|
||
private function getAdvancedFilterPartForSearch($search, $searchAttributes) {
|
||
if(!is_array($searchAttributes) || count($searchAttributes) < 2) {
|
||
throw new \Exception('searchAttributes must be an array with at least two string');
|
||
}
|
||
$searchWords = explode(' ', trim($search));
|
||
$wordFilters = array();
|
||
foreach($searchWords as $word) {
|
||
$word .= '*';
|
||
//every word needs to appear at least once
|
||
$wordMatchOneAttrFilters = array();
|
||
foreach($searchAttributes as $attr) {
|
||
$wordMatchOneAttrFilters[] = $attr . '=' . $word;
|
||
}
|
||
$wordFilters[] = $this->combineFilterWithOr($wordMatchOneAttrFilters);
|
||
}
|
||
return $this->combineFilterWithAnd($wordFilters);
|
||
}
|
||
|
||
/**
|
||
* creates a filter part for searches
|
||
* @param string $search the search term
|
||
* @param string[]|null $searchAttributes
|
||
* @param string $fallbackAttribute a fallback attribute in case the user
|
||
* did not define search attributes. Typically the display name attribute.
|
||
* @return string the final filter part to use in LDAP searches
|
||
*/
|
||
private function getFilterPartForSearch($search, $searchAttributes, $fallbackAttribute) {
|
||
$filter = array();
|
||
$haveMultiSearchAttributes = (is_array($searchAttributes) && count($searchAttributes) > 0);
|
||
if($haveMultiSearchAttributes && strpos(trim($search), ' ') !== false) {
|
||
try {
|
||
return $this->getAdvancedFilterPartForSearch($search, $searchAttributes);
|
||
} catch(\Exception $e) {
|
||
\OCP\Util::writeLog(
|
||
'user_ldap',
|
||
'Creating advanced filter for search failed, falling back to simple method.',
|
||
\OCP\Util::INFO
|
||
);
|
||
}
|
||
}
|
||
$search = empty($search) ? '*' : $search.'*';
|
||
if(!is_array($searchAttributes) || count($searchAttributes) === 0) {
|
||
if(empty($fallbackAttribute)) {
|
||
return '';
|
||
}
|
||
$filter[] = $fallbackAttribute . '=' . $search;
|
||
} else {
|
||
foreach($searchAttributes as $attribute) {
|
||
$filter[] = $attribute . '=' . $search;
|
||
}
|
||
}
|
||
if(count($filter) === 1) {
|
||
return '('.$filter[0].')';
|
||
}
|
||
return $this->combineFilterWithOr($filter);
|
||
}
|
||
|
||
/**
|
||
* returns the filter used for counting users
|
||
* @return string
|
||
*/
|
||
public function getFilterForUserCount() {
|
||
$filter = $this->combineFilterWithAnd(array(
|
||
$this->connection->ldapUserFilter,
|
||
$this->connection->ldapUserDisplayName . '=*'
|
||
));
|
||
|
||
return $filter;
|
||
}
|
||
|
||
/**
|
||
* @param string $name
|
||
* @param string $password
|
||
* @return bool
|
||
*/
|
||
public function areCredentialsValid($name, $password) {
|
||
$name = $this->DNasBaseParameter($name);
|
||
$testConnection = clone $this->connection;
|
||
$credentials = array(
|
||
'ldapAgentName' => $name,
|
||
'ldapAgentPassword' => $password
|
||
);
|
||
if(!$testConnection->setConfiguration($credentials)) {
|
||
return false;
|
||
}
|
||
$result=$testConnection->bind();
|
||
$this->connection->bind();
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* auto-detects the directory's UUID attribute
|
||
* @param string $dn a known DN used to check against
|
||
* @param bool $isUser
|
||
* @param bool $force the detection should be run, even if it is not set to auto
|
||
* @return bool true on success, false otherwise
|
||
*/
|
||
private function detectUuidAttribute($dn, $isUser = true, $force = false) {
|
||
if($isUser) {
|
||
$uuidAttr = 'ldapUuidUserAttribute';
|
||
$uuidOverride = $this->connection->ldapExpertUUIDUserAttr;
|
||
} else {
|
||
$uuidAttr = 'ldapUuidGroupAttribute';
|
||
$uuidOverride = $this->connection->ldapExpertUUIDGroupAttr;
|
||
}
|
||
|
||
if(($this->connection->$uuidAttr !== 'auto') && !$force) {
|
||
return true;
|
||
}
|
||
|
||
if(!empty($uuidOverride) && !$force) {
|
||
$this->connection->$uuidAttr = $uuidOverride;
|
||
return true;
|
||
}
|
||
|
||
// for now, supported attributes are entryUUID, nsuniqueid, objectGUID, ipaUniqueID
|
||
$testAttributes = array('entryuuid', 'nsuniqueid', 'objectguid', 'guid', 'ipauniqueid');
|
||
|
||
foreach($testAttributes as $attribute) {
|
||
$value = $this->readAttribute($dn, $attribute);
|
||
if(is_array($value) && isset($value[0]) && !empty($value[0])) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'Setting '.$attribute.' as '.$uuidAttr,
|
||
\OCP\Util::DEBUG);
|
||
$this->connection->$uuidAttr = $attribute;
|
||
return true;
|
||
}
|
||
}
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'Could not autodetect the UUID attribute',
|
||
\OCP\Util::ERROR);
|
||
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @param string $dn
|
||
* @param bool $isUser
|
||
* @return string|bool
|
||
*/
|
||
public function getUUID($dn, $isUser = true) {
|
||
if($isUser) {
|
||
$uuidAttr = 'ldapUuidUserAttribute';
|
||
$uuidOverride = $this->connection->ldapExpertUUIDUserAttr;
|
||
} else {
|
||
$uuidAttr = 'ldapUuidGroupAttribute';
|
||
$uuidOverride = $this->connection->ldapExpertUUIDGroupAttr;
|
||
}
|
||
|
||
$uuid = false;
|
||
if($this->detectUuidAttribute($dn, $isUser)) {
|
||
$uuid = $this->readAttribute($dn, $this->connection->$uuidAttr);
|
||
if( !is_array($uuid)
|
||
&& !empty($uuidOverride)
|
||
&& $this->detectUuidAttribute($dn, $isUser, true)) {
|
||
$uuid = $this->readAttribute($dn,
|
||
$this->connection->$uuidAttr);
|
||
}
|
||
if(is_array($uuid) && isset($uuid[0]) && !empty($uuid[0])) {
|
||
$uuid = $uuid[0];
|
||
}
|
||
}
|
||
|
||
return $uuid;
|
||
}
|
||
|
||
/**
|
||
* converts a binary ObjectGUID into a string representation
|
||
* @param string $oguid the ObjectGUID in it's binary form as retrieved from AD
|
||
* @return string
|
||
* @link http://www.php.net/manual/en/function.ldap-get-values-len.php#73198
|
||
*/
|
||
private function convertObjectGUID2Str($oguid) {
|
||
$hex_guid = bin2hex($oguid);
|
||
$hex_guid_to_guid_str = '';
|
||
for($k = 1; $k <= 4; ++$k) {
|
||
$hex_guid_to_guid_str .= substr($hex_guid, 8 - 2 * $k, 2);
|
||
}
|
||
$hex_guid_to_guid_str .= '-';
|
||
for($k = 1; $k <= 2; ++$k) {
|
||
$hex_guid_to_guid_str .= substr($hex_guid, 12 - 2 * $k, 2);
|
||
}
|
||
$hex_guid_to_guid_str .= '-';
|
||
for($k = 1; $k <= 2; ++$k) {
|
||
$hex_guid_to_guid_str .= substr($hex_guid, 16 - 2 * $k, 2);
|
||
}
|
||
$hex_guid_to_guid_str .= '-' . substr($hex_guid, 16, 4);
|
||
$hex_guid_to_guid_str .= '-' . substr($hex_guid, 20);
|
||
|
||
return strtoupper($hex_guid_to_guid_str);
|
||
}
|
||
|
||
/**
|
||
* gets a SID of the domain of the given dn
|
||
* @param string $dn
|
||
* @return string|bool
|
||
*/
|
||
public function getSID($dn) {
|
||
$domainDN = $this->getDomainDNFromDN($dn);
|
||
$cacheKey = 'getSID-'.$domainDN;
|
||
if($this->connection->isCached($cacheKey)) {
|
||
return $this->connection->getFromCache($cacheKey);
|
||
}
|
||
|
||
$objectSid = $this->readAttribute($domainDN, 'objectsid');
|
||
if(!is_array($objectSid) || empty($objectSid)) {
|
||
$this->connection->writeToCache($cacheKey, false);
|
||
return false;
|
||
}
|
||
$domainObjectSid = $this->convertSID2Str($objectSid[0]);
|
||
$this->connection->writeToCache($cacheKey, $domainObjectSid);
|
||
|
||
return $domainObjectSid;
|
||
}
|
||
|
||
/**
|
||
* converts a binary SID into a string representation
|
||
* @param string $sid
|
||
* @return string
|
||
*/
|
||
public function convertSID2Str($sid) {
|
||
// The format of a SID binary string is as follows:
|
||
// 1 byte for the revision level
|
||
// 1 byte for the number n of variable sub-ids
|
||
// 6 bytes for identifier authority value
|
||
// n*4 bytes for n sub-ids
|
||
//
|
||
// Example: 010400000000000515000000a681e50e4d6c6c2bca32055f
|
||
// Legend: RRNNAAAAAAAAAAAA11111111222222223333333344444444
|
||
$revision = ord($sid[0]);
|
||
$numberSubID = ord($sid[1]);
|
||
|
||
$subIdStart = 8; // 1 + 1 + 6
|
||
$subIdLength = 4;
|
||
if (strlen($sid) !== $subIdStart + $subIdLength * $numberSubID) {
|
||
// Incorrect number of bytes present.
|
||
return '';
|
||
}
|
||
|
||
// 6 bytes = 48 bits can be represented using floats without loss of
|
||
// precision (see https://gist.github.com/bantu/886ac680b0aef5812f71)
|
||
$iav = number_format(hexdec(bin2hex(substr($sid, 2, 6))), 0, '', '');
|
||
|
||
$subIDs = array();
|
||
for ($i = 0; $i < $numberSubID; $i++) {
|
||
$subID = unpack('V', substr($sid, $subIdStart + $subIdLength * $i, $subIdLength));
|
||
$subIDs[] = sprintf('%u', $subID[1]);
|
||
}
|
||
|
||
// Result for example above: S-1-5-21-249921958-728525901-1594176202
|
||
return sprintf('S-%d-%s-%s', $revision, $iav, implode('-', $subIDs));
|
||
}
|
||
|
||
/**
|
||
* converts a stored DN so it can be used as base parameter for LDAP queries, internally we store them for usage in LDAP filters
|
||
* @param string $dn the DN
|
||
* @return string
|
||
*/
|
||
private function DNasBaseParameter($dn) {
|
||
return str_ireplace('\\5c', '\\', $dn);
|
||
}
|
||
|
||
/**
|
||
* checks if the given DN is part of the given base DN(s)
|
||
* @param string $dn the DN
|
||
* @param string[] $bases array containing the allowed base DN or DNs
|
||
* @return bool
|
||
*/
|
||
public function isDNPartOfBase($dn, $bases) {
|
||
$belongsToBase = false;
|
||
$bases = $this->sanitizeDN($bases);
|
||
|
||
foreach($bases as $base) {
|
||
$belongsToBase = true;
|
||
if(mb_strripos($dn, $base, 0, 'UTF-8') !== (mb_strlen($dn, 'UTF-8')-mb_strlen($base, 'UTF-8'))) {
|
||
$belongsToBase = false;
|
||
}
|
||
if($belongsToBase) {
|
||
break;
|
||
}
|
||
}
|
||
return $belongsToBase;
|
||
}
|
||
|
||
/**
|
||
* resets a running Paged Search operation
|
||
*/
|
||
private function abandonPagedSearch() {
|
||
if($this->connection->hasPagedResultSupport) {
|
||
$cr = $this->connection->getConnectionResource();
|
||
$this->ldap->controlPagedResult($cr, 0, false, $this->lastCookie);
|
||
$this->getPagedSearchResultState();
|
||
$this->lastCookie = '';
|
||
$this->cookies = array();
|
||
}
|
||
}
|
||
|
||
/**
|
||
* get a cookie for the next LDAP paged search
|
||
* @param string $base a string with the base DN for the search
|
||
* @param string $filter the search filter to identify the correct search
|
||
* @param int $limit the limit (or 'pageSize'), to identify the correct search well
|
||
* @param int $offset the offset for the new search to identify the correct search really good
|
||
* @return string containing the key or empty if none is cached
|
||
*/
|
||
private function getPagedResultCookie($base, $filter, $limit, $offset) {
|
||
if($offset === 0) {
|
||
return '';
|
||
}
|
||
$offset -= $limit;
|
||
//we work with cache here
|
||
$cacheKey = 'lc' . crc32($base) . '-' . crc32($filter) . '-' . intval($limit) . '-' . intval($offset);
|
||
$cookie = '';
|
||
if(isset($this->cookies[$cacheKey])) {
|
||
$cookie = $this->cookies[$cacheKey];
|
||
if(is_null($cookie)) {
|
||
$cookie = '';
|
||
}
|
||
}
|
||
return $cookie;
|
||
}
|
||
|
||
/**
|
||
* set a cookie for LDAP paged search run
|
||
* @param string $base a string with the base DN for the search
|
||
* @param string $filter the search filter to identify the correct search
|
||
* @param int $limit the limit (or 'pageSize'), to identify the correct search well
|
||
* @param int $offset the offset for the run search to identify the correct search really good
|
||
* @param string $cookie string containing the cookie returned by ldap_control_paged_result_response
|
||
* @return void
|
||
*/
|
||
private function setPagedResultCookie($base, $filter, $limit, $offset, $cookie) {
|
||
// allow '0' for 389ds
|
||
if(!empty($cookie) || $cookie === '0') {
|
||
$cacheKey = 'lc' . crc32($base) . '-' . crc32($filter) . '-' .intval($limit) . '-' . intval($offset);
|
||
$this->cookies[$cacheKey] = $cookie;
|
||
$this->lastCookie = $cookie;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Check whether the most recent paged search was successful. It flushed the state var. Use it always after a possible paged search.
|
||
* @return boolean|null true on success, null or false otherwise
|
||
*/
|
||
public function getPagedSearchResultState() {
|
||
$result = $this->pagedSearchedSuccessful;
|
||
$this->pagedSearchedSuccessful = null;
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* Prepares a paged search, if possible
|
||
* @param string $filter the LDAP filter for the search
|
||
* @param string[] $bases an array containing the LDAP subtree(s) that shall be searched
|
||
* @param string[] $attr optional, when a certain attribute shall be filtered outside
|
||
* @param int $limit
|
||
* @param int $offset
|
||
* @return bool|true
|
||
*/
|
||
private function initPagedSearch($filter, $bases, $attr, $limit, $offset) {
|
||
$pagedSearchOK = false;
|
||
if($this->connection->hasPagedResultSupport && ($limit !== 0)) {
|
||
$offset = intval($offset); //can be null
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'initializing paged search for Filter '.$filter.' base '.print_r($bases, true)
|
||
.' attr '.print_r($attr, true). ' limit ' .$limit.' offset '.$offset,
|
||
\OCP\Util::DEBUG);
|
||
//get the cookie from the search for the previous search, required by LDAP
|
||
foreach($bases as $base) {
|
||
|
||
$cookie = $this->getPagedResultCookie($base, $filter, $limit, $offset);
|
||
if(empty($cookie) && $cookie !== "0" && ($offset > 0)) {
|
||
// no cookie known, although the offset is not 0. Maybe cache run out. We need
|
||
// to start all over *sigh* (btw, Dear Reader, did you know LDAP paged
|
||
// searching was designed by MSFT?)
|
||
// Lukas: No, but thanks to reading that source I finally know!
|
||
// '0' is valid, because 389ds
|
||
$reOffset = ($offset - $limit) < 0 ? 0 : $offset - $limit;
|
||
//a bit recursive, $offset of 0 is the exit
|
||
\OCP\Util::writeLog('user_ldap', 'Looking for cookie L/O '.$limit.'/'.$reOffset, \OCP\Util::INFO);
|
||
$this->search($filter, array($base), $attr, $limit, $reOffset, true);
|
||
$cookie = $this->getPagedResultCookie($base, $filter, $limit, $offset);
|
||
//still no cookie? obviously, the server does not like us. Let's skip paging efforts.
|
||
//TODO: remember this, probably does not change in the next request...
|
||
if(empty($cookie) && $cookie !== '0') {
|
||
// '0' is valid, because 389ds
|
||
$cookie = null;
|
||
}
|
||
}
|
||
if(!is_null($cookie)) {
|
||
//since offset = 0, this is a new search. We abandon other searches that might be ongoing.
|
||
$this->abandonPagedSearch();
|
||
$pagedSearchOK = $this->ldap->controlPagedResult(
|
||
$this->connection->getConnectionResource(), $limit,
|
||
false, $cookie);
|
||
if(!$pagedSearchOK) {
|
||
return false;
|
||
}
|
||
\OCP\Util::writeLog('user_ldap', 'Ready for a paged search', \OCP\Util::DEBUG);
|
||
} else {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'No paged search for us, Cpt., Limit '.$limit.' Offset '.$offset,
|
||
\OCP\Util::INFO);
|
||
}
|
||
|
||
}
|
||
} else if($this->connection->hasPagedResultSupport && $limit === 0) {
|
||
// a search without limit was requested. However, if we do use
|
||
// Paged Search once, we always must do it. This requires us to
|
||
// initialize it with the configured page size.
|
||
$this->abandonPagedSearch();
|
||
// in case someone set it to 0 … use 500, otherwise no results will
|
||
// be returned.
|
||
$pageSize = intval($this->connection->ldapPagingSize) > 0 ? intval($this->connection->ldapPagingSize) : 500;
|
||
$pagedSearchOK = $this->ldap->controlPagedResult(
|
||
$this->connection->getConnectionResource(), $pageSize, false, ''
|
||
);
|
||
}
|
||
|
||
return $pagedSearchOK;
|
||
}
|
||
|
||
}
|