511 lines
15 KiB
PHP
511 lines
15 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 Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Dominik Schmidt <dev@dominik-schmidt.de>
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* @author felixboehm <felix@webhippie.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 Renaud Fortier <Renaud.Fortier@fsaa.ulaval.ca>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Tom Needham <tom@owncloud.com>
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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\User\NoUserException;
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use OCA\User_LDAP\Exceptions\NotOnLDAP;
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use OCA\User_LDAP\User\OfflineUser;
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use OCA\User_LDAP\User\User;
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use OCP\IConfig;
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class User_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserInterface, IUserLDAP {
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/** @var string[] $homesToKill */
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protected $homesToKill = array();
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/** @var \OCP\IConfig */
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protected $ocConfig;
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/**
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* @param Access $access
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* @param \OCP\IConfig $ocConfig
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*/
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public function __construct(Access $access, IConfig $ocConfig) {
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parent::__construct($access);
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$this->ocConfig = $ocConfig;
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}
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/**
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* checks whether the user is allowed to change his avatar in ownCloud
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* @param string $uid the ownCloud user name
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* @return boolean either the user can or cannot
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*/
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public function canChangeAvatar($uid) {
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$user = $this->access->userManager->get($uid);
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if(!$user instanceof User) {
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return false;
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}
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if($user->getAvatarImage() === false) {
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return true;
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}
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return false;
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}
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/**
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* returns the username for the given login name, if available
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*
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* @param string $loginName
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* @return string|false
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*/
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public function loginName2UserName($loginName) {
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$cacheKey = 'loginName2UserName-'.$loginName;
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$username = $this->access->connection->getFromCache($cacheKey);
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if(!is_null($username)) {
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return $username;
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}
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try {
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$ldapRecord = $this->getLDAPUserByLoginName($loginName);
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$user = $this->access->userManager->get($ldapRecord['dn'][0]);
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if($user instanceof OfflineUser) {
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// this path is not really possible, however get() is documented
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// to return User or OfflineUser so we are very defensive here.
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$this->access->connection->writeToCache($cacheKey, false);
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return false;
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}
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$username = $user->getUsername();
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$this->access->connection->writeToCache($cacheKey, $username);
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return $username;
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} catch (NotOnLDAP $e) {
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$this->access->connection->writeToCache($cacheKey, false);
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return false;
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}
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}
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/**
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* returns the username for the given LDAP DN, if available
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*
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* @param string $dn
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* @return string|false with the username
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*/
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public function dn2UserName($dn) {
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return $this->access->dn2username($dn);
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}
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/**
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* returns an LDAP record based on a given login name
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*
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* @param string $loginName
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* @return array
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* @throws NotOnLDAP
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*/
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public function getLDAPUserByLoginName($loginName) {
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//find out dn of the user name
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$attrs = $this->access->userManager->getAttributes();
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$users = $this->access->fetchUsersByLoginName($loginName, $attrs);
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if(count($users) < 1) {
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throw new NotOnLDAP('No user available for the given login name on ' .
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$this->access->connection->ldapHost . ':' . $this->access->connection->ldapPort);
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}
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return $users[0];
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}
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/**
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* Check if the password is correct
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* @param string $uid The username
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* @param string $password The password
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* @return false|string
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*
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* Check if the password is correct without logging in the user
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*/
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public function checkPassword($uid, $password) {
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try {
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$ldapRecord = $this->getLDAPUserByLoginName($uid);
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} catch(\Exception $e) {
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\OC::$server->getLogger()->logException($e, ['app' => 'user_ldap']);
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return false;
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}
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$dn = $ldapRecord['dn'][0];
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$user = $this->access->userManager->get($dn);
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if(!$user instanceof User) {
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\OCP\Util::writeLog('user_ldap',
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'LDAP Login: Could not get user object for DN ' . $dn .
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'. Maybe the LDAP entry has no set display name attribute?',
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\OCP\Util::WARN);
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return false;
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}
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if($user->getUsername() !== false) {
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//are the credentials OK?
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if(!$this->access->areCredentialsValid($dn, $password)) {
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return false;
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}
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$this->access->cacheUserExists($user->getUsername());
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$user->processAttributes($ldapRecord);
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$user->markLogin();
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return $user->getUsername();
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}
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return false;
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}
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/**
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* Get a list of all users
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*
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* @param string $search
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* @param integer $limit
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* @param integer $offset
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* @return string[] an array of all uids
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*/
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public function getUsers($search = '', $limit = 10, $offset = 0) {
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$search = $this->access->escapeFilterPart($search, true);
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$cachekey = 'getUsers-'.$search.'-'.$limit.'-'.$offset;
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//check if users are cached, if so return
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$ldap_users = $this->access->connection->getFromCache($cachekey);
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if(!is_null($ldap_users)) {
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return $ldap_users;
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}
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// if we'd pass -1 to LDAP search, we'd end up in a Protocol
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// error. With a limit of 0, we get 0 results. So we pass null.
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if($limit <= 0) {
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$limit = null;
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}
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$filter = $this->access->combineFilterWithAnd(array(
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$this->access->connection->ldapUserFilter,
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$this->access->connection->ldapUserDisplayName . '=*',
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$this->access->getFilterPartForUserSearch($search)
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));
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\OCP\Util::writeLog('user_ldap',
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'getUsers: Options: search '.$search.' limit '.$limit.' offset '.$offset.' Filter: '.$filter,
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\OCP\Util::DEBUG);
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//do the search and translate results to owncloud names
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$ldap_users = $this->access->fetchListOfUsers(
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$filter,
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$this->access->userManager->getAttributes(true),
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$limit, $offset);
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$ldap_users = $this->access->ownCloudUserNames($ldap_users);
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\OCP\Util::writeLog('user_ldap', 'getUsers: '.count($ldap_users). ' Users found', \OCP\Util::DEBUG);
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$this->access->connection->writeToCache($cachekey, $ldap_users);
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return $ldap_users;
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}
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/**
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* checks whether a user is still available on LDAP
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*
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* @param string|\OCA\User_LDAP\User\User $user either the ownCloud user
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* name or an instance of that user
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* @return bool
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* @throws \Exception
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* @throws \OC\ServerNotAvailableException
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*/
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public function userExistsOnLDAP($user) {
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if(is_string($user)) {
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$user = $this->access->userManager->get($user);
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}
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if(is_null($user)) {
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return false;
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}
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$dn = $user->getDN();
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//check if user really still exists by reading its entry
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if(!is_array($this->access->readAttribute($dn, '', $this->access->connection->ldapUserFilter))) {
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$lcr = $this->access->connection->getConnectionResource();
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if(is_null($lcr)) {
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throw new \Exception('No LDAP Connection to server ' . $this->access->connection->ldapHost);
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}
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try {
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$uuid = $this->access->getUserMapper()->getUUIDByDN($dn);
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if(!$uuid) {
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return false;
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}
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$newDn = $this->access->getUserDnByUuid($uuid);
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//check if renamed user is still valid by reapplying the ldap filter
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if(!is_array($this->access->readAttribute($newDn, '', $this->access->connection->ldapUserFilter))) {
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return false;
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}
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$this->access->getUserMapper()->setDNbyUUID($newDn, $uuid);
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return true;
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} catch (\Exception $e) {
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return false;
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}
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}
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if($user instanceof OfflineUser) {
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$user->unmark();
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}
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return true;
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}
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/**
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* check if a user exists
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* @param string $uid the username
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* @return boolean
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* @throws \Exception when connection could not be established
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*/
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public function userExists($uid) {
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$userExists = $this->access->connection->getFromCache('userExists'.$uid);
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if(!is_null($userExists)) {
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return (bool)$userExists;
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}
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//getting dn, if false the user does not exist. If dn, he may be mapped only, requires more checking.
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$user = $this->access->userManager->get($uid);
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if(is_null($user)) {
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\OCP\Util::writeLog('user_ldap', 'No DN found for '.$uid.' on '.
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$this->access->connection->ldapHost, \OCP\Util::DEBUG);
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$this->access->connection->writeToCache('userExists'.$uid, false);
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return false;
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} else if($user instanceof OfflineUser) {
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//express check for users marked as deleted. Returning true is
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//necessary for cleanup
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return true;
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}
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$result = $this->userExistsOnLDAP($user);
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$this->access->connection->writeToCache('userExists'.$uid, $result);
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if($result === true) {
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$user->update();
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}
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return $result;
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}
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/**
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* returns whether a user was deleted in LDAP
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*
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* @param string $uid The username of the user to delete
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* @return bool
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*/
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public function deleteUser($uid) {
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$marked = $this->ocConfig->getUserValue($uid, 'user_ldap', 'isDeleted', 0);
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if(intval($marked) === 0) {
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\OC::$server->getLogger()->notice(
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'User '.$uid . ' is not marked as deleted, not cleaning up.',
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array('app' => 'user_ldap'));
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return false;
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}
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\OC::$server->getLogger()->info('Cleaning up after user ' . $uid,
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array('app' => 'user_ldap'));
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//Get Home Directory out of user preferences so we can return it later,
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//necessary for removing directories as done by OC_User.
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$home = $this->ocConfig->getUserValue($uid, 'user_ldap', 'homePath', '');
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$this->homesToKill[$uid] = $home;
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$this->access->getUserMapper()->unmap($uid);
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return true;
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}
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/**
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* get the user's home directory
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*
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* @param string $uid the username
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* @return bool|string
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* @throws NoUserException
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* @throws \Exception
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*/
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public function getHome($uid) {
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if(isset($this->homesToKill[$uid]) && !empty($this->homesToKill[$uid])) {
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//a deleted user who needs some clean up
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return $this->homesToKill[$uid];
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}
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// user Exists check required as it is not done in user proxy!
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if(!$this->userExists($uid)) {
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return false;
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}
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$cacheKey = 'getHome'.$uid;
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$path = $this->access->connection->getFromCache($cacheKey);
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if(!is_null($path)) {
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return $path;
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}
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$user = $this->access->userManager->get($uid);
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if(is_null($user) || ($user instanceof OfflineUser && !$this->userExistsOnLDAP($user->getOCName()))) {
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throw new NoUserException($uid . ' is not a valid user anymore');
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}
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if($user instanceof OfflineUser) {
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// apparently this user survived the userExistsOnLDAP check,
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// we request the user instance again in order to retrieve a User
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// instance instead
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$user = $this->access->userManager->get($uid);
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}
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$path = $user->getHomePath();
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$this->access->cacheUserHome($uid, $path);
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return $path;
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}
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/**
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* get display name of the user
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* @param string $uid user ID of the user
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* @return string|false display name
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*/
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public function getDisplayName($uid) {
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if(!$this->userExists($uid)) {
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return false;
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}
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$cacheKey = 'getDisplayName'.$uid;
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if(!is_null($displayName = $this->access->connection->getFromCache($cacheKey))) {
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return $displayName;
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}
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//Check whether the display name is configured to have a 2nd feature
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$additionalAttribute = $this->access->connection->ldapUserDisplayName2;
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$displayName2 = '';
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if ($additionalAttribute !== '') {
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$displayName2 = $this->access->readAttribute(
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$this->access->username2dn($uid),
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$additionalAttribute);
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}
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$displayName = $this->access->readAttribute(
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$this->access->username2dn($uid),
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$this->access->connection->ldapUserDisplayName);
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if($displayName && (count($displayName) > 0)) {
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$displayName = $displayName[0];
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if (is_array($displayName2)){
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$displayName2 = count($displayName2) > 0 ? $displayName2[0] : '';
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}
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$user = $this->access->userManager->get($uid);
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if ($user instanceof User) {
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$displayName = $user->composeAndStoreDisplayName($displayName, $displayName2);
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$this->access->connection->writeToCache($cacheKey, $displayName);
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}
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if ($user instanceof OfflineUser) {
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/** @var OfflineUser $user*/
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$displayName = $user->getDisplayName();
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}
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return $displayName;
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}
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return null;
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}
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/**
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* Get a list of all display names
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*
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* @param string $search
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* @param string|null $limit
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* @param string|null $offset
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* @return array an array of all displayNames (value) and the corresponding uids (key)
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*/
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public function getDisplayNames($search = '', $limit = null, $offset = null) {
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$cacheKey = 'getDisplayNames-'.$search.'-'.$limit.'-'.$offset;
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if(!is_null($displayNames = $this->access->connection->getFromCache($cacheKey))) {
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return $displayNames;
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}
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$displayNames = array();
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$users = $this->getUsers($search, $limit, $offset);
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foreach ($users as $user) {
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$displayNames[$user] = $this->getDisplayName($user);
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}
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$this->access->connection->writeToCache($cacheKey, $displayNames);
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return $displayNames;
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}
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/**
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* Check if backend implements actions
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* @param int $actions bitwise-or'ed actions
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* @return boolean
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*
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* Returns the supported actions as int to be
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* compared with OC_USER_BACKEND_CREATE_USER etc.
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*/
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public function implementsActions($actions) {
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return (bool)((\OC\User\Backend::CHECK_PASSWORD
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| \OC\User\Backend::GET_HOME
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| \OC\User\Backend::GET_DISPLAYNAME
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| \OC\User\Backend::PROVIDE_AVATAR
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| \OC\User\Backend::COUNT_USERS)
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& $actions);
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}
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/**
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* @return bool
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*/
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public function hasUserListings() {
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return true;
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}
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/**
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* counts the users in LDAP
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*
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* @return int|bool
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*/
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public function countUsers() {
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$filter = $this->access->getFilterForUserCount();
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$cacheKey = 'countUsers-'.$filter;
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if(!is_null($entries = $this->access->connection->getFromCache($cacheKey))) {
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return $entries;
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}
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$entries = $this->access->countUsers($filter);
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$this->access->connection->writeToCache($cacheKey, $entries);
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return $entries;
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}
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/**
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* Backend name to be shown in user management
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* @return string the name of the backend to be shown
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*/
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public function getBackendName(){
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return 'LDAP';
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}
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/**
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* Return access for LDAP interaction.
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* @param string $uid
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* @return Access instance of Access for LDAP interaction
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*/
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public function getLDAPAccess($uid) {
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return $this->access;
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}
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/**
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* Return LDAP connection resource from a cloned connection.
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* The cloned connection needs to be closed manually.
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* of the current access.
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* @param string $uid
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* @return resource of the LDAP connection
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*/
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public function getNewLDAPConnection($uid) {
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$connection = clone $this->access->getConnection();
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return $connection->getConnectionResource();
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}
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}
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