658 lines
20 KiB
PHP
658 lines
20 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 Daniel Kesselberg <mail@danielkesselberg.de>
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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 Roger Szabo <roger.szabo@web.de>
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* @author root <root@localhost.localdomain>
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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 Victor Dubiniuk <dubiniuk@owncloud.com>
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* @author Vinicius Cubas Brand <vinicius@eita.org.br>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\User_LDAP;
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use OC\ServerNotAvailableException;
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use OC\User\Backend;
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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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use OCP\ILogger;
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use OCP\IUser;
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use OCP\IUserSession;
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use OCP\Notification\IManager as INotificationManager;
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use OCP\Util;
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class User_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserInterface, IUserLDAP {
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/** @var \OCP\IConfig */
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protected $ocConfig;
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/** @var INotificationManager */
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protected $notificationManager;
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/** @var string */
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protected $currentUserInDeletionProcess;
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/** @var UserPluginManager */
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protected $userPluginManager;
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/**
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* @param Access $access
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* @param \OCP\IConfig $ocConfig
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* @param \OCP\Notification\IManager $notificationManager
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* @param IUserSession $userSession
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*/
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public function __construct(Access $access, IConfig $ocConfig, INotificationManager $notificationManager, IUserSession $userSession, UserPluginManager $userPluginManager) {
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parent::__construct($access);
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$this->ocConfig = $ocConfig;
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$this->notificationManager = $notificationManager;
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$this->userPluginManager = $userPluginManager;
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$this->registerHooks($userSession);
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}
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protected function registerHooks(IUserSession $userSession) {
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$userSession->listen('\OC\User', 'preDelete', [$this, 'preDeleteUser']);
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$userSession->listen('\OC\User', 'postDelete', [$this, 'postDeleteUser']);
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}
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public function preDeleteUser(IUser $user) {
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$this->currentUserInDeletionProcess = $user->getUID();
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}
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public function postDeleteUser() {
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$this->currentUserInDeletionProcess = null;
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}
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/**
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* checks whether the user is allowed to change his avatar in Nextcloud
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*
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* @param string $uid the Nextcloud user name
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* @return boolean either the user can or cannot
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* @throws \Exception
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*/
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public function canChangeAvatar($uid) {
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if ($this->userPluginManager->implementsActions(Backend::PROVIDE_AVATAR)) {
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return $this->userPluginManager->canChangeAvatar($uid);
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}
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if(!$this->implementsActions(Backend::PROVIDE_AVATAR)) {
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return true;
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}
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$user = $this->access->userManager->get($uid);
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if(!$user instanceof User) {
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return false;
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}
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$imageData = $user->getAvatarImage();
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if($imageData === false) {
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return true;
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}
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return !$user->updateAvatar(true);
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}
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/**
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* Return the username for the given login name, if available
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*
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* @param string $loginName
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* @return string|false
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* @throws \Exception
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*/
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public function loginName2UserName($loginName) {
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$cacheKey = 'loginName2UserName-' . $loginName;
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$username = $this->access->connection->getFromCache($cacheKey);
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if ($username !== null) {
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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 === null || $user instanceof OfflineUser) {
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// this path is not really possible, however get() is documented
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// to return User, OfflineUser or null so we are very defensive here.
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$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 without logging in the user
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*
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* @param string $uid The username
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* @param string $password The password
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* @return false|string
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*/
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public function checkPassword($uid, $password) {
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try {
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$ldapRecord = $this->getLDAPUserByLoginName($uid);
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} catch(NotOnLDAP $e) {
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\OC::$server->getLogger()->logException($e, ['app' => 'user_ldap', 'level' => ILogger::DEBUG]);
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return false;
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}
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$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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Util::writeLog('user_ldap',
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'LDAP Login: Could not get user object for DN ' . $dn .
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'. Maybe the LDAP entry has no set display name attribute?',
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ILogger::WARN);
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return false;
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}
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if($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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* Set password
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* @param string $uid The username
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* @param string $password The new password
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* @return bool
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*/
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public function setPassword($uid, $password) {
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if ($this->userPluginManager->implementsActions(Backend::SET_PASSWORD)) {
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return $this->userPluginManager->setPassword($uid, $password);
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}
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$user = $this->access->userManager->get($uid);
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if(!$user instanceof User) {
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throw new \Exception('LDAP setPassword: Could not get user object for uid ' . $uid .
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'. Maybe the LDAP entry has no set display name attribute?');
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}
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if($user->getUsername() !== false && $this->access->setPassword($user->getDN(), $password)) {
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$ldapDefaultPPolicyDN = $this->access->connection->ldapDefaultPPolicyDN;
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$turnOnPasswordChange = $this->access->connection->turnOnPasswordChange;
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if (!empty($ldapDefaultPPolicyDN) && ((int)$turnOnPasswordChange === 1)) {
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//remove last password expiry warning if any
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$notification = $this->notificationManager->createNotification();
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$notification->setApp('user_ldap')
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->setUser($uid)
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->setObject('pwd_exp_warn', $uid)
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;
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$this->notificationManager->markProcessed($notification);
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}
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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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* 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($search)
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));
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Util::writeLog('user_ldap',
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'getUsers: Options: search '.$search.' limit '.$limit.' offset '.$offset.' Filter: '.$filter,
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ILogger::DEBUG);
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//do the search and translate results to Nextcloud names
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$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 = $this->access->nextcloudUserNames($ldap_users);
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Util::writeLog('user_ldap', 'getUsers: '.count($ldap_users). ' Users found', ILogger::DEBUG);
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$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 $user either the Nextcloud user
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* name or an instance of that user
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* @return bool
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* @throws \Exception
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* @throws \OC\ServerNotAvailableException
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*/
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public function userExistsOnLDAP($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, '', $this->access->connection->ldapUserFilter))) {
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try {
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$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 ($newDn === $dn || !is_array($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 (ServerNotAvailableException $e) {
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throw $e;
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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($user)) {
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Util::writeLog('user_ldap', 'No DN found for '.$uid.' on '.
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$this->access->connection->ldapHost, ILogger::DEBUG);
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$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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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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if ($this->userPluginManager->canDeleteUser()) {
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$status = $this->userPluginManager->deleteUser($uid);
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if($status === false) {
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return false;
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}
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}
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$marked = $this->ocConfig->getUserValue($uid, 'user_ldap', 'isDeleted', 0);
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if((int)$marked === 0) {
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\OC::$server->getLogger()->notice(
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'User '.$uid . ' is not marked as deleted, not cleaning up.',
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['app' => 'user_ldap']);
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return false;
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}
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\OC::$server->getLogger()->info('Cleaning up after user ' . $uid,
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['app' => 'user_ldap']);
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$this->access->getUserMapper()->unmap($uid); // we don't emit unassign signals here, since it is implicit to delete signals fired from core
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$this->access->userManager->invalidate($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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// 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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if ($this->userPluginManager->implementsActions(Backend::GET_HOME)) {
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return $this->userPluginManager->getHome($uid);
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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 $path;
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}
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// early return path if it is a deleted user
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$user = $this->access->userManager->get($uid);
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if($user instanceof OfflineUser) {
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if($this->currentUserInDeletionProcess !== null
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&& $this->currentUserInDeletionProcess === $user->getOCName()
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) {
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return $user->getHomePath();
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} else {
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throw new NoUserException($uid . ' is not a valid user anymore');
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}
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} else if ($user === null) {
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throw new NoUserException($uid . ' is not a valid user anymore');
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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->userPluginManager->implementsActions(Backend::GET_DISPLAYNAME)) {
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return $this->userPluginManager->getDisplayName($uid);
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}
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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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* set display name of the user
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* @param string $uid user ID of the user
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* @param string $displayName new display name of the user
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* @return string|false display name
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*/
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public function setDisplayName($uid, $displayName) {
|
|
if ($this->userPluginManager->implementsActions(Backend::SET_DISPLAYNAME)) {
|
|
$this->userPluginManager->setDisplayName($uid, $displayName);
|
|
$this->access->cacheUserDisplayName($uid, $displayName);
|
|
return $displayName;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get a list of all display names
|
|
*
|
|
* @param string $search
|
|
* @param string|null $limit
|
|
* @param string|null $offset
|
|
* @return array an array of all displayNames (value) and the corresponding uids (key)
|
|
*/
|
|
public function getDisplayNames($search = '', $limit = null, $offset = null) {
|
|
$cacheKey = 'getDisplayNames-'.$search.'-'.$limit.'-'.$offset;
|
|
if(!is_null($displayNames = $this->access->connection->getFromCache($cacheKey))) {
|
|
return $displayNames;
|
|
}
|
|
|
|
$displayNames = array();
|
|
$users = $this->getUsers($search, $limit, $offset);
|
|
foreach ($users as $user) {
|
|
$displayNames[$user] = $this->getDisplayName($user);
|
|
}
|
|
$this->access->connection->writeToCache($cacheKey, $displayNames);
|
|
return $displayNames;
|
|
}
|
|
|
|
/**
|
|
* Check if backend implements actions
|
|
* @param int $actions bitwise-or'ed actions
|
|
* @return boolean
|
|
*
|
|
* Returns the supported actions as int to be
|
|
* compared with \OC\User\Backend::CREATE_USER etc.
|
|
*/
|
|
public function implementsActions($actions) {
|
|
return (bool)((Backend::CHECK_PASSWORD
|
|
| Backend::GET_HOME
|
|
| Backend::GET_DISPLAYNAME
|
|
| (($this->access->connection->ldapUserAvatarRule !== 'none') ? Backend::PROVIDE_AVATAR : 0)
|
|
| Backend::COUNT_USERS
|
|
| (((int)$this->access->connection->turnOnPasswordChange === 1)? Backend::SET_PASSWORD :0)
|
|
| $this->userPluginManager->getImplementedActions())
|
|
& $actions);
|
|
}
|
|
|
|
/**
|
|
* @return bool
|
|
*/
|
|
public function hasUserListings() {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* counts the users in LDAP
|
|
*
|
|
* @return int|bool
|
|
*/
|
|
public function countUsers() {
|
|
if ($this->userPluginManager->implementsActions(Backend::COUNT_USERS)) {
|
|
return $this->userPluginManager->countUsers();
|
|
}
|
|
|
|
$filter = $this->access->getFilterForUserCount();
|
|
$cacheKey = 'countUsers-'.$filter;
|
|
if(!is_null($entries = $this->access->connection->getFromCache($cacheKey))) {
|
|
return $entries;
|
|
}
|
|
$entries = $this->access->countUsers($filter);
|
|
$this->access->connection->writeToCache($cacheKey, $entries);
|
|
return $entries;
|
|
}
|
|
|
|
/**
|
|
* Backend name to be shown in user management
|
|
* @return string the name of the backend to be shown
|
|
*/
|
|
public function getBackendName(){
|
|
return 'LDAP';
|
|
}
|
|
|
|
/**
|
|
* Return access for LDAP interaction.
|
|
* @param string $uid
|
|
* @return Access instance of Access for LDAP interaction
|
|
*/
|
|
public function getLDAPAccess($uid) {
|
|
return $this->access;
|
|
}
|
|
|
|
/**
|
|
* Return LDAP connection resource from a cloned connection.
|
|
* The cloned connection needs to be closed manually.
|
|
* of the current access.
|
|
* @param string $uid
|
|
* @return resource of the LDAP connection
|
|
*/
|
|
public function getNewLDAPConnection($uid) {
|
|
$connection = clone $this->access->getConnection();
|
|
return $connection->getConnectionResource();
|
|
}
|
|
|
|
/**
|
|
* create new user
|
|
* @param string $username username of the new user
|
|
* @param string $password password of the new user
|
|
* @throws \UnexpectedValueException
|
|
* @return bool
|
|
*/
|
|
public function createUser($username, $password) {
|
|
if ($this->userPluginManager->implementsActions(Backend::CREATE_USER)) {
|
|
if ($dn = $this->userPluginManager->createUser($username, $password)) {
|
|
if (is_string($dn)) {
|
|
// the NC user creation work flow requires a know user id up front
|
|
$uuid = $this->access->getUUID($dn, true);
|
|
if(is_string($uuid)) {
|
|
$this->access->mapAndAnnounceIfApplicable(
|
|
$this->access->getUserMapper(),
|
|
$dn,
|
|
$username,
|
|
$uuid,
|
|
true
|
|
);
|
|
$this->access->cacheUserExists($username);
|
|
} else {
|
|
\OC::$server->getLogger()->warning(
|
|
'Failed to map created LDAP user with userid {userid}, because UUID could not be determined',
|
|
[
|
|
'app' => 'user_ldap',
|
|
'userid' => $username,
|
|
]
|
|
);
|
|
}
|
|
} else {
|
|
throw new \UnexpectedValueException("LDAP Plugin: Method createUser changed to return the user DN instead of boolean.");
|
|
}
|
|
}
|
|
return (bool) $dn;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
}
|