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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author adrien <adrien.waksberg@believedigital.com>
* @author Aldo "xoen" Giambelluca <xoen@xoen.org>
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Bart Visscher <bartv@thisnet.nl>
* @author Bjoern Schiessle <bjoern@schiessle.org>
* @author Björn Schießle <bjoern@schiessle.org>
* @author fabian <fabian@web2.0-apps.de>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Jakob Sack <mail@jakobsack.de>
* @author Joas Schilling <coding@schilljs.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Loki3000 <github@labcms.ru>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Michael Gapczynski <GapczynskiM@gmail.com>
* @author michag86 <micha_g@arcor.de>
* @author Morris Jobke <hey@morrisjobke.de>
* @author nishiki <nishiki@yaegashi.fr>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @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/>
*
*/
/*
*
* The following SQL statement is just a help for developers and will not be
* executed!
*
* CREATE TABLE `users` (
* `uid` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
* `password` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
* PRIMARY KEY (`uid`)
* ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
*
*/
namespace OC\User;
use OC\Cache\CappedMemoryCache;
use OCP\IDBConnection;
use OCP\User\Backend\ABackend;
use OCP\User\Backend\ICheckPasswordBackend;
use OCP\User\Backend\ICountUsersBackend;
use OCP\User\Backend\ICreateUserBackend;
use OCP\User\Backend\IGetDisplayNameBackend;
use OCP\User\Backend\IGetHomeBackend;
use OCP\User\Backend\IGetRealUIDBackend;
use OCP\User\Backend\ISetDisplayNameBackend;
use OCP\User\Backend\ISetPasswordBackend;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\EventDispatcher\GenericEvent;
/**
* Class for user management in a SQL Database (e.g. MySQL, SQLite)
*/
class Database extends ABackend
implements ICreateUserBackend,
ISetPasswordBackend,
ISetDisplayNameBackend,
IGetDisplayNameBackend,
ICheckPasswordBackend,
IGetHomeBackend,
ICountUsersBackend,
IGetRealUIDBackend {
/** @var CappedMemoryCache */
private $cache;
/** @var EventDispatcherInterface */
private $eventDispatcher;
/** @var IDBConnection */
private $dbConn;
/** @var string */
private $table;
/**
* \OC\User\Database constructor.
*
* @param EventDispatcherInterface $eventDispatcher
* @param string $table
*/
public function __construct($eventDispatcher = null, $table = 'users') {
$this->cache = new CappedMemoryCache();
$this->table = $table;
$this->eventDispatcher = $eventDispatcher ? $eventDispatcher : \OC::$server->getEventDispatcher();
}
/**
* FIXME: This function should not be required!
*/
private function fixDI() {
if ($this->dbConn === null) {
$this->dbConn = \OC::$server->getDatabaseConnection();
}
}
/**
* Create a new user
*
* @param string $uid The username of the user to create
* @param string $password The password of the new user
* @return bool
*
* Creates a new user. Basic checking of username is done in OC_User
* itself, not in its subclasses.
*/
public function createUser(string $uid, string $password): bool {
$this->fixDI();
if (!$this->userExists($uid)) {
$event = new GenericEvent($password);
$this->eventDispatcher->dispatch('OCP\PasswordPolicy::validate', $event);
$qb = $this->dbConn->getQueryBuilder();
$qb->insert($this->table)
->values([
'uid' => $qb->createNamedParameter($uid),
'password' => $qb->createNamedParameter(\OC::$server->getHasher()->hash($password)),
'uid_lower' => $qb->createNamedParameter(mb_strtolower($uid)),
]);
$result = $qb->execute();
// Clear cache
unset($this->cache[$uid]);
return $result ? true : false;
}
return false;
}
/**
* delete a user
*
* @param string $uid The username of the user to delete
* @return bool
*
* Deletes a user
*/
public function deleteUser($uid) {
$this->fixDI();
// Delete user-group-relation
$query = $this->dbConn->getQueryBuilder();
$query->delete($this->table)
->where($query->expr()->eq('uid_lower', $query->createNamedParameter(mb_strtolower($uid))));
$result = $query->execute();
if (isset($this->cache[$uid])) {
unset($this->cache[$uid]);
}
return $result ? true : false;
}
private function updatePassword(string $uid, string $passwordHash): bool {
$query = $this->dbConn->getQueryBuilder();
$query->update($this->table)
->set('password', $query->createNamedParameter($passwordHash))
->where($query->expr()->eq('uid_lower', $query->createNamedParameter(mb_strtolower($uid))));
$result = $query->execute();
return $result ? true : false;
}
/**
* Set password
*
* @param string $uid The username
* @param string $password The new password
* @return bool
*
* Change the password of a user
*/
public function setPassword(string $uid, string $password): bool {
$this->fixDI();
if ($this->userExists($uid)) {
$event = new GenericEvent($password);
$this->eventDispatcher->dispatch('OCP\PasswordPolicy::validate', $event);
$hasher = \OC::$server->getHasher();
$hashedPassword = $hasher->hash($password);
return $this->updatePassword($uid, $hashedPassword);
}
return false;
}
/**
* Set display name
*
* @param string $uid The username
* @param string $displayName The new display name
* @return bool
*
* Change the display name of a user
*/
public function setDisplayName(string $uid, string $displayName): bool {
$this->fixDI();
if ($this->userExists($uid)) {
$query = $this->dbConn->getQueryBuilder();
$query->update($this->table)
->set('displayname', $query->createNamedParameter($displayName))
->where($query->expr()->eq('uid_lower', $query->createNamedParameter(mb_strtolower($uid))));
$query->execute();
$this->cache[$uid]['displayname'] = $displayName;
return true;
}
return false;
}
/**
* get display name of the user
*
* @param string $uid user ID of the user
* @return string display name
*/
public function getDisplayName($uid): string {
$uid = (string)$uid;
$this->loadUser($uid);
return empty($this->cache[$uid]['displayname']) ? $uid : $this->cache[$uid]['displayname'];
}
/**
* Get a list of all display names and user ids.
*
* @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) {
$this->fixDI();
$query = $this->dbConn->getQueryBuilder();
$query->select('uid', 'displayname')
->from($this->table, 'u')
->leftJoin('u', 'preferences', 'p', $query->expr()->andX(
$query->expr()->eq('userid', 'uid'),
$query->expr()->eq('appid', $query->expr()->literal('settings')),
$query->expr()->eq('configkey', $query->expr()->literal('email')))
)
// sqlite doesn't like re-using a single named parameter here
->where($query->expr()->iLike('uid', $query->createPositionalParameter('%' . $this->dbConn->escapeLikeParameter($search) . '%')))
->orWhere($query->expr()->iLike('displayname', $query->createPositionalParameter('%' . $this->dbConn->escapeLikeParameter($search) . '%')))
->orWhere($query->expr()->iLike('configvalue', $query->createPositionalParameter('%' . $this->dbConn->escapeLikeParameter($search) . '%')))
->orderBy($query->func()->lower('displayname'), 'ASC')
->orderBy('uid_lower', 'ASC')
->setMaxResults($limit)
->setFirstResult($offset);
$result = $query->execute();
$displayNames = [];
while ($row = $result->fetch()) {
$displayNames[(string)$row['uid']] = (string)$row['displayname'];
}
return $displayNames;
}
/**
* Check if the password is correct
*
* @param string $uid The username
* @param string $password The password
* @return string
*
* Check if the password is correct without logging in the user
* returns the user id or false
*/
public function checkPassword(string $uid, string $password) {
$this->fixDI();
$qb = $this->dbConn->getQueryBuilder();
$qb->select('uid', 'password')
->from($this->table)
->where(
$qb->expr()->eq(
'uid_lower', $qb->createNamedParameter(mb_strtolower($uid))
)
);
$result = $qb->execute();
$row = $result->fetch();
$result->closeCursor();
if ($row) {
$storedHash = $row['password'];
$newHash = '';
if (\OC::$server->getHasher()->verify($password, $storedHash, $newHash)) {
if (!empty($newHash)) {
$this->updatePassword($uid, $newHash);
}
return (string)$row['uid'];
}
}
return false;
}
/**
* Load an user in the cache
*
* @param string $uid the username
* @return boolean true if user was found, false otherwise
*/
private function loadUser($uid) {
$this->fixDI();
$uid = (string)$uid;
if (!isset($this->cache[$uid])) {
//guests $uid could be NULL or ''
if ($uid === '') {
$this->cache[$uid] = false;
return true;
}
$qb = $this->dbConn->getQueryBuilder();
$qb->select('uid', 'displayname')
->from($this->table)
->where(
$qb->expr()->eq(
'uid_lower', $qb->createNamedParameter(mb_strtolower($uid))
)
);
$result = $qb->execute();
$row = $result->fetch();
$result->closeCursor();
$this->cache[$uid] = false;
// "uid" is primary key, so there can only be a single result
if ($row !== false) {
$this->cache[$uid]['uid'] = (string)$row['uid'];
$this->cache[$uid]['displayname'] = (string)$row['displayname'];
} else {
return false;
}
}
return true;
}
/**
* Get a list of all users
*
* @param string $search
* @param null|int $limit
* @param null|int $offset
* @return string[] an array of all uids
*/
public function getUsers($search = '', $limit = null, $offset = null) {
$users = $this->getDisplayNames($search, $limit, $offset);
$userIds = array_map(function ($uid) {
return (string)$uid;
}, array_keys($users));
sort($userIds, SORT_STRING | SORT_FLAG_CASE);
return $userIds;
}
/**
* check if a user exists
*
* @param string $uid the username
* @return boolean
*/
public function userExists($uid) {
$this->loadUser($uid);
return $this->cache[$uid] !== false;
}
/**
* get the user's home directory
*
* @param string $uid the username
* @return string|false
*/
public function getHome(string $uid) {
if ($this->userExists($uid)) {
return \OC::$server->getConfig()->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data') . '/' . $uid;
}
return false;
}
/**
* @return bool
*/
public function hasUserListings() {
return true;
}
/**
* counts the users in the database
*
* @return int|bool
*/
public function countUsers() {
$this->fixDI();
$query = $this->dbConn->getQueryBuilder();
$query->select($query->func()->count('uid'))
->from($this->table);
$result = $query->execute();
return $result->fetchColumn();
}
/**
* returns the username for the given login name in the correct casing
*
* @param string $loginName
* @return string|false
*/
public function loginName2UserName($loginName) {
if ($this->userExists($loginName)) {
return $this->cache[$loginName]['uid'];
}
return false;
}
/**
* Backend name to be shown in user management
*
* @return string the name of the backend to be shown
*/
public function getBackendName() {
return 'Database';
}
public static function preLoginNameUsedAsUserName($param) {
if (!isset($param['uid'])) {
throw new \Exception('key uid is expected to be set in $param');
}
$backends = \OC::$server->getUserManager()->getBackends();
foreach ($backends as $backend) {
if ($backend instanceof Database) {
/** @var \OC\User\Database $backend */
$uid = $backend->loginName2UserName($param['uid']);
if ($uid !== false) {
$param['uid'] = $uid;
return;
}
}
}
}
public function getRealUID(string $uid): string {
if (!$this->userExists($uid)) {
throw new \RuntimeException($uid . ' does not exist');
}
return $this->cache[$uid]['uid'];
}
}
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