nextcloud/lib/private/user/manager.php

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<?php
/**
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* @author Arthur Schiwon <blizzz@owncloud.com>
* @author Joas Schilling <nickvergessen@owncloud.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@owncloud.com>
* @author Michael U <mdusher@users.noreply.github.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author RealRancor <Fisch.666@gmx.de>
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* @author Robin Appelman <icewind@owncloud.com>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Chan <plus.vincchan@gmail.com>
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* @author Volkan Gezer <volkangezer@gmail.com>
*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
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*/
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namespace OC\User;
use OC\Hooks\PublicEmitter;
use OCP\IUserManager;
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use OCP\IConfig;
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/**
* Class Manager
*
* Hooks available in scope \OC\User:
* - preSetPassword(\OC\User\User $user, string $password, string $recoverPassword)
* - postSetPassword(\OC\User\User $user, string $password, string $recoverPassword)
* - preDelete(\OC\User\User $user)
* - postDelete(\OC\User\User $user)
* - preCreateUser(string $uid, string $password)
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* - postCreateUser(\OC\User\User $user, string $password)
* - change(\OC\User\User $user)
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*
* @package OC\User
*/
class Manager extends PublicEmitter implements IUserManager {
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/**
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* @var \OCP\UserInterface[] $backends
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*/
private $backends = array();
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/**
* @var \OC\User\User[] $cachedUsers
*/
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private $cachedUsers = array();
/**
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* @var \OCP\IConfig $config
*/
private $config;
/**
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* @param \OCP\IConfig $config
*/
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public function __construct(IConfig $config = null) {
$this->config = $config;
$cachedUsers = &$this->cachedUsers;
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$this->listen('\OC\User', 'postDelete', function ($user) use (&$cachedUsers) {
/** @var \OC\User\User $user */
unset($cachedUsers[$user->getUID()]);
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});
$this->listen('\OC\User', 'postLogin', function ($user) {
/** @var \OC\User\User $user */
$user->updateLastLoginTimestamp();
});
$this->listen('\OC\User', 'postRememberedLogin', function ($user) {
/** @var \OC\User\User $user */
$user->updateLastLoginTimestamp();
});
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}
/**
* Get the active backends
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* @return \OCP\UserInterface[]
*/
public function getBackends() {
return $this->backends;
}
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/**
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* register a user backend
*
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* @param \OCP\UserInterface $backend
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*/
public function registerBackend($backend) {
$this->backends[] = $backend;
}
/**
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* remove a user backend
*
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* @param \OCP\UserInterface $backend
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*/
public function removeBackend($backend) {
$this->cachedUsers = array();
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if (($i = array_search($backend, $this->backends)) !== false) {
unset($this->backends[$i]);
}
}
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/**
* remove all user backends
*/
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public function clearBackends() {
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$this->cachedUsers = array();
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$this->backends = array();
}
/**
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* get a user by user id
*
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* @param string $uid
* @return \OC\User\User|null Either the user or null if the specified user does not exist
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*/
public function get($uid) {
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if (isset($this->cachedUsers[$uid])) { //check the cache first to prevent having to loop over the backends
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return $this->cachedUsers[$uid];
}
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foreach ($this->backends as $backend) {
if ($backend->userExists($uid)) {
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return $this->getUserObject($uid, $backend);
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}
}
return null;
}
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/**
* get or construct the user object
*
* @param string $uid
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* @param \OCP\UserInterface $backend
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* @return \OC\User\User
*/
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protected function getUserObject($uid, $backend) {
if (isset($this->cachedUsers[$uid])) {
return $this->cachedUsers[$uid];
}
$this->cachedUsers[$uid] = new User($uid, $backend, $this, $this->config);
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return $this->cachedUsers[$uid];
}
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/**
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* check if a user exists
*
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* @param string $uid
* @return bool
*/
public function userExists($uid) {
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$user = $this->get($uid);
return ($user !== null);
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}
/**
* Check if the password is valid for the user
*
* @param string $loginname
* @param string $password
* @return mixed the User object on success, false otherwise
*/
public function checkPassword($loginname, $password) {
$loginname = str_replace("\0", '', $loginname);
$password = str_replace("\0", '', $password);
foreach ($this->backends as $backend) {
if ($backend->implementsActions(\OC_User_Backend::CHECK_PASSWORD)) {
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$uid = $backend->checkPassword($loginname, $password);
if ($uid !== false) {
return $this->getUserObject($uid, $backend);
}
}
}
\OC::$server->getLogger()->warning('Login failed: \''. $loginname .'\' (Remote IP: \''. \OC::$server->getRequest()->getRemoteAddress(). '\')', ['app' => 'core']);
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return false;
}
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/**
* search by user id
*
* @param string $pattern
* @param int $limit
* @param int $offset
* @return \OC\User\User[]
*/
public function search($pattern, $limit = null, $offset = null) {
$users = array();
foreach ($this->backends as $backend) {
$backendUsers = $backend->getUsers($pattern, $limit, $offset);
if (is_array($backendUsers)) {
foreach ($backendUsers as $uid) {
$users[$uid] = $this->getUserObject($uid, $backend);
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}
}
}
uasort($users, function ($a, $b) {
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/**
* @var \OC\User\User $a
* @var \OC\User\User $b
*/
return strcmp($a->getUID(), $b->getUID());
});
return $users;
}
/**
* search by displayName
*
* @param string $pattern
* @param int $limit
* @param int $offset
* @return \OC\User\User[]
*/
public function searchDisplayName($pattern, $limit = null, $offset = null) {
$users = array();
foreach ($this->backends as $backend) {
$backendUsers = $backend->getDisplayNames($pattern, $limit, $offset);
if (is_array($backendUsers)) {
foreach ($backendUsers as $uid => $displayName) {
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$users[] = $this->getUserObject($uid, $backend);
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}
}
}
usort($users, function ($a, $b) {
/**
* @var \OC\User\User $a
* @var \OC\User\User $b
*/
return strcmp($a->getDisplayName(), $b->getDisplayName());
});
return $users;
}
/**
* @param string $uid
* @param string $password
* @throws \Exception
* @return bool|\OC\User\User the created user or false
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*/
public function createUser($uid, $password) {
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$l = \OC::$server->getL10N('lib');
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// Check the name for bad characters
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// Allowed are: "a-z", "A-Z", "0-9" and "_.@-'"
if (preg_match('/[^a-zA-Z0-9 _\.@\-\']/', $uid)) {
throw new \Exception($l->t('Only the following characters are allowed in a username:'
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. ' "a-z", "A-Z", "0-9", and "_.@-\'"'));
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}
// No empty username
if (trim($uid) == '') {
throw new \Exception($l->t('A valid username must be provided'));
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}
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// No whitespace at the beginning or at the end
if (strlen(trim($uid, "\t\n\r\0\x0B\xe2\x80\x8b")) !== strlen(trim($uid))) {
throw new \Exception($l->t('Username contains whitespace at the beginning or at the end'));
}
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// No empty password
if (trim($password) == '') {
throw new \Exception($l->t('A valid password must be provided'));
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}
// Check if user already exists
if ($this->userExists($uid)) {
throw new \Exception($l->t('The username is already being used'));
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}
$this->emit('\OC\User', 'preCreateUser', array($uid, $password));
foreach ($this->backends as $backend) {
if ($backend->implementsActions(\OC_User_Backend::CREATE_USER)) {
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$backend->createUser($uid, $password);
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$user = $this->getUserObject($uid, $backend);
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$this->emit('\OC\User', 'postCreateUser', array($user, $password));
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return $user;
}
}
return false;
}
/**
* returns how many users per backend exist (if supported by backend)
*
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* @return array an array of backend class as key and count number as value
*/
public function countUsers() {
$userCountStatistics = array();
foreach ($this->backends as $backend) {
if ($backend->implementsActions(\OC_User_Backend::COUNT_USERS)) {
$backendUsers = $backend->countUsers();
if($backendUsers !== false) {
if($backend instanceof \OCP\IUserBackend) {
$name = $backend->getBackendName();
} else {
$name = get_class($backend);
}
if(isset($userCountStatistics[$name])) {
$userCountStatistics[$name] += $backendUsers;
} else {
$userCountStatistics[$name] = $backendUsers;
}
}
}
}
return $userCountStatistics;
}
/**
* The callback is executed for each user on each backend.
* If the callback returns false no further users will be retrieved.
*
* @param \Closure $callback
* @return void
* @since 9.0.0
*/
public function callForAllUsers(\Closure $callback, $search = '') {
foreach($this->getBackends() as $backend) {
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$limit = 500;
$offset = 0;
do {
$users = $backend->getUsers($search, $limit, $offset);
foreach ($users as $user) {
$user = $this->get($user);
$return = $callback($user);
if ($return === false) {
break;
}
}
$offset += $limit;
} while (count($users) >= $limit);
}
}
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}