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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Bjoern Schiessle <bjoern@schiessle.org>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Joas Schilling <coding@schilljs.com>
* @author John Molakvoæ <skjnldsv@protonmail.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Chan <plus.vincchan@gmail.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/>
*
*/
namespace OC\User;
use OC\HintException;
use OC\Hooks\PublicEmitter;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\EventDispatcher\IEventDispatcher;
use OCP\ICache;
use OCP\ICacheFactory;
use OCP\IConfig;
use OCP\IGroup;
use OCP\IUser;
use OCP\IUserBackend;
use OCP\IUserManager;
use OCP\Support\Subscription\IRegistry;
use OCP\User\Backend\IGetRealUIDBackend;
use OCP\User\Backend\ISearchKnownUsersBackend;
use OCP\User\Events\BeforeUserCreatedEvent;
use OCP\User\Events\UserCreatedEvent;
use OCP\UserInterface;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
/**
* 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)
* - postCreateUser(\OC\User\User $user, string $password)
* - change(\OC\User\User $user)
* - assignedUserId(string $uid)
* - preUnassignedUserId(string $uid)
* - postUnassignedUserId(string $uid)
*
* @package OC\User
*/
class Manager extends PublicEmitter implements IUserManager {
/**
* @var \OCP\UserInterface[] $backends
*/
private $backends = [];
/**
* @var \OC\User\User[] $cachedUsers
*/
private $cachedUsers = [];
/** @var IConfig */
private $config;
/** @var EventDispatcherInterface */
private $dispatcher;
/** @var ICache */
private $cache;
/** @var IEventDispatcher */
private $eventDispatcher;
public function __construct(IConfig $config,
EventDispatcherInterface $oldDispatcher,
ICacheFactory $cacheFactory,
IEventDispatcher $eventDispatcher) {
$this->config = $config;
$this->dispatcher = $oldDispatcher;
$this->cache = $cacheFactory->createDistributed('user_backend_map');
$cachedUsers = &$this->cachedUsers;
$this->listen('\OC\User', 'postDelete', function ($user) use (&$cachedUsers) {
/** @var \OC\User\User $user */
unset($cachedUsers[$user->getUID()]);
});
$this->eventDispatcher = $eventDispatcher;
}
/**
* Get the active backends
* @return \OCP\UserInterface[]
*/
public function getBackends() {
return $this->backends;
}
/**
* register a user backend
*
* @param \OCP\UserInterface $backend
*/
public function registerBackend($backend) {
$this->backends[] = $backend;
}
/**
* remove a user backend
*
* @param \OCP\UserInterface $backend
*/
public function removeBackend($backend) {
$this->cachedUsers = [];
if (($i = array_search($backend, $this->backends)) !== false) {
unset($this->backends[$i]);
}
}
/**
* remove all user backends
*/
public function clearBackends() {
$this->cachedUsers = [];
$this->backends = [];
}
/**
* get a user by user id
*
* @param string $uid
* @return \OC\User\User|null Either the user or null if the specified user does not exist
*/
public function get($uid) {
if (is_null($uid) || $uid === '' || $uid === false) {
return null;
}
if (isset($this->cachedUsers[$uid])) { //check the cache first to prevent having to loop over the backends
return $this->cachedUsers[$uid];
}
$cachedBackend = $this->cache->get($uid);
if ($cachedBackend !== null && isset($this->backends[$cachedBackend])) {
// Cache has the info of the user backend already, so ask that one directly
$backend = $this->backends[$cachedBackend];
if ($backend->userExists($uid)) {
return $this->getUserObject($uid, $backend);
}
}
foreach ($this->backends as $i => $backend) {
if ($i === $cachedBackend) {
// Tried that one already
continue;
}
if ($backend->userExists($uid)) {
$this->cache->set($uid, $i, 300);
return $this->getUserObject($uid, $backend);
}
}
return null;
}
/**
* get or construct the user object
*
* @param string $uid
* @param \OCP\UserInterface $backend
* @param bool $cacheUser If false the newly created user object will not be cached
* @return \OC\User\User
*/
protected function getUserObject($uid, $backend, $cacheUser = true) {
if ($backend instanceof IGetRealUIDBackend) {
$uid = $backend->getRealUID($uid);
}
if (isset($this->cachedUsers[$uid])) {
return $this->cachedUsers[$uid];
}
$user = new User($uid, $backend, $this->dispatcher, $this, $this->config);
if ($cacheUser) {
$this->cachedUsers[$uid] = $user;
}
return $user;
}
/**
* check if a user exists
*
* @param string $uid
* @return bool
*/
public function userExists($uid) {
$user = $this->get($uid);
return ($user !== null);
}
/**
* 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) {
$result = $this->checkPasswordNoLogging($loginName, $password);
if ($result === false) {
\OC::$server->getLogger()->warning('Login failed: \''. $loginName .'\' (Remote IP: \''. \OC::$server->getRequest()->getRemoteAddress(). '\')', ['app' => 'core']);
}
return $result;
}
/**
* Check if the password is valid for the user
*
* @internal
* @param string $loginName
* @param string $password
* @return IUser|false the User object on success, false otherwise
*/
public function checkPasswordNoLogging($loginName, $password) {
$loginName = str_replace("\0", '', $loginName);
$password = str_replace("\0", '', $password);
foreach ($this->backends as $backend) {
if ($backend->implementsActions(Backend::CHECK_PASSWORD)) {
$uid = $backend->checkPassword($loginName, $password);
if ($uid !== false) {
return $this->getUserObject($uid, $backend);
}
}
}
// since http basic auth doesn't provide a standard way of handling non ascii password we allow password to be urlencoded
// we only do this decoding after using the plain password fails to maintain compatibility with any password that happens
// to contains urlencoded patterns by "accident".
$password = urldecode($password);
foreach ($this->backends as $backend) {
if ($backend->implementsActions(Backend::CHECK_PASSWORD)) {
$uid = $backend->checkPassword($loginName, $password);
if ($uid !== false) {
return $this->getUserObject($uid, $backend);
}
}
}
return false;
}
/**
* 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) {
$users = [];
foreach ($this->backends as $backend) {
$backendUsers = $backend->getUsers($pattern, $limit, $offset);
if (is_array($backendUsers)) {
foreach ($backendUsers as $uid) {
$users[$uid] = $this->getUserObject($uid, $backend);
}
}
}
uasort($users, function ($a, $b) {
/**
* @var \OC\User\User $a
* @var \OC\User\User $b
*/
return strcasecmp($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) {
$users = [];
foreach ($this->backends as $backend) {
$backendUsers = $backend->getDisplayNames($pattern, $limit, $offset);
if (is_array($backendUsers)) {
foreach ($backendUsers as $uid => $displayName) {
$users[] = $this->getUserObject($uid, $backend);
}
}
}
usort($users, function ($a, $b) {
/**
* @var \OC\User\User $a
* @var \OC\User\User $b
*/
return strcasecmp($a->getDisplayName(), $b->getDisplayName());
});
return $users;
}
/**
* Search known users (from phonebook sync) by displayName
*
* @param string $searcher
* @param string $pattern
* @param int|null $limit
* @param int|null $offset
* @return IUser[]
*/
public function searchKnownUsersByDisplayName(string $searcher, string $pattern, ?int $limit = null, ?int $offset = null): array {
$users = [];
foreach ($this->backends as $backend) {
if ($backend instanceof ISearchKnownUsersBackend) {
$backendUsers = $backend->searchKnownUsersByDisplayName($searcher, $pattern, $limit, $offset);
} else {
// Better than nothing, but filtering after pagination can remove lots of results.
$backendUsers = $backend->getDisplayNames($pattern, $limit, $offset);
}
if (is_array($backendUsers)) {
foreach ($backendUsers as $uid => $displayName) {
$users[] = $this->getUserObject($uid, $backend);
}
}
}
usort($users, function ($a, $b) {
/**
* @var IUser $a
* @var IUser $b
*/
return strcasecmp($a->getDisplayName(), $b->getDisplayName());
});
return $users;
}
/**
* @param string $uid
* @param string $password
* @throws \InvalidArgumentException
* @return bool|IUser the created user or false
*/
public function createUser($uid, $password) {
// DI injection is not used here as IRegistry needs the user manager itself for user count and thus it would create a cyclic dependency
if (\OC::$server->get(IRegistry::class)->delegateIsHardUserLimitReached()) {
$l = \OC::$server->getL10N('lib');
throw new HintException($l->t('The user limit has been reached and the user was not created.'));
}
$localBackends = [];
foreach ($this->backends as $backend) {
if ($backend instanceof Database) {
// First check if there is another user backend
$localBackends[] = $backend;
continue;
}
if ($backend->implementsActions(Backend::CREATE_USER)) {
return $this->createUserFromBackend($uid, $password, $backend);
}
}
foreach ($localBackends as $backend) {
if ($backend->implementsActions(Backend::CREATE_USER)) {
return $this->createUserFromBackend($uid, $password, $backend);
}
}
return false;
}
/**
* @param string $uid
* @param string $password
* @param UserInterface $backend
* @return IUser|null
* @throws \InvalidArgumentException
*/
public function createUserFromBackend($uid, $password, UserInterface $backend) {
$l = \OC::$server->getL10N('lib');
// Check the name for bad characters
// Allowed are: "a-z", "A-Z", "0-9" and "_.@-'"
if (preg_match('/[^a-zA-Z0-9 _.@\-\']/', $uid)) {
throw new \InvalidArgumentException($l->t('Only the following characters are allowed in a username:'
. ' "a-z", "A-Z", "0-9", and "_.@-\'"'));
}
// No empty username
if (trim($uid) === '') {
throw new \InvalidArgumentException($l->t('A valid username must be provided'));
}
// No whitespace at the beginning or at the end
if (trim($uid) !== $uid) {
throw new \InvalidArgumentException($l->t('Username contains whitespace at the beginning or at the end'));
}
// Username only consists of 1 or 2 dots (directory traversal)
if ($uid === '.' || $uid === '..') {
throw new \InvalidArgumentException($l->t('Username must not consist of dots only'));
}
if (!$this->verifyUid($uid)) {
throw new \InvalidArgumentException($l->t('Username is invalid because files already exist for this user'));
}
// No empty password
if (trim($password) === '') {
throw new \InvalidArgumentException($l->t('A valid password must be provided'));
}
// Check if user already exists
if ($this->userExists($uid)) {
throw new \InvalidArgumentException($l->t('The username is already being used'));
}
/** @deprecated 21.0.0 use BeforeUserCreatedEvent event with the IEventDispatcher instead */
$this->emit('\OC\User', 'preCreateUser', [$uid, $password]);
$this->eventDispatcher->dispatchTyped(new BeforeUserCreatedEvent($uid, $password));
$state = $backend->createUser($uid, $password);
if ($state === false) {
throw new \InvalidArgumentException($l->t('Could not create user'));
}
$user = $this->getUserObject($uid, $backend);
if ($user instanceof IUser) {
/** @deprecated 21.0.0 use UserCreatedEvent event with the IEventDispatcher instead */
$this->emit('\OC\User', 'postCreateUser', [$user, $password]);
$this->eventDispatcher->dispatchTyped(new UserCreatedEvent($user, $password));
}
return $user;
}
/**
* returns how many users per backend exist (if supported by backend)
*
* @param boolean $hasLoggedIn when true only users that have a lastLogin
* entry in the preferences table will be affected
* @return array|int an array of backend class as key and count number as value
* if $hasLoggedIn is true only an int is returned
*/
public function countUsers($hasLoggedIn = false) {
if ($hasLoggedIn) {
return $this->countSeenUsers();
}
$userCountStatistics = [];
foreach ($this->backends as $backend) {
if ($backend->implementsActions(Backend::COUNT_USERS)) {
$backendUsers = $backend->countUsers();
if ($backendUsers !== false) {
if ($backend instanceof IUserBackend) {
$name = $backend->getBackendName();
} else {
$name = get_class($backend);
}
if (isset($userCountStatistics[$name])) {
$userCountStatistics[$name] += $backendUsers;
} else {
$userCountStatistics[$name] = $backendUsers;
}
}
}
}
return $userCountStatistics;
}
/**
* returns how many users per backend exist in the requested groups (if supported by backend)
*
* @param IGroup[] $groups an array of gid to search in
* @return array|int an array of backend class as key and count number as value
* if $hasLoggedIn is true only an int is returned
*/
public function countUsersOfGroups(array $groups) {
$users = [];
foreach ($groups as $group) {
$usersIds = array_map(function ($user) {
return $user->getUID();
}, $group->getUsers());
$users = array_merge($users, $usersIds);
}
return count(array_unique($users));
}
/**
* The callback is executed for each user on each backend.
* If the callback returns false no further users will be retrieved.
*
* @param \Closure $callback
* @param string $search
* @param boolean $onlySeen when true only users that have a lastLogin entry
* in the preferences table will be affected
* @since 9.0.0
*/
public function callForAllUsers(\Closure $callback, $search = '', $onlySeen = false) {
if ($onlySeen) {
$this->callForSeenUsers($callback);
} else {
foreach ($this->getBackends() as $backend) {
$limit = 500;
$offset = 0;
do {
$users = $backend->getUsers($search, $limit, $offset);
foreach ($users as $uid) {
if (!$backend->userExists($uid)) {
continue;
}
$user = $this->getUserObject($uid, $backend, false);
$return = $callback($user);
if ($return === false) {
break;
}
}
$offset += $limit;
} while (count($users) >= $limit);
}
}
}
/**
* returns how many users are disabled
*
* @return int
* @since 12.0.0
*/
public function countDisabledUsers(): int {
$queryBuilder = \OC::$server->getDatabaseConnection()->getQueryBuilder();
$queryBuilder->select($queryBuilder->func()->count('*'))
->from('preferences')
->where($queryBuilder->expr()->eq('appid', $queryBuilder->createNamedParameter('core')))
->andWhere($queryBuilder->expr()->eq('configkey', $queryBuilder->createNamedParameter('enabled')))
->andWhere($queryBuilder->expr()->eq('configvalue', $queryBuilder->createNamedParameter('false'), IQueryBuilder::PARAM_STR));
$result = $queryBuilder->execute();
$count = $result->fetchOne();
$result->closeCursor();
if ($count !== false) {
$count = (int)$count;
} else {
$count = 0;
}
return $count;
}
/**
* returns how many users are disabled in the requested groups
*
* @param array $groups groupids to search
* @return int
* @since 14.0.0
*/
public function countDisabledUsersOfGroups(array $groups): int {
$queryBuilder = \OC::$server->getDatabaseConnection()->getQueryBuilder();
$queryBuilder->select($queryBuilder->createFunction('COUNT(DISTINCT ' . $queryBuilder->getColumnName('uid') . ')'))
->from('preferences', 'p')
->innerJoin('p', 'group_user', 'g', $queryBuilder->expr()->eq('p.userid', 'g.uid'))
->where($queryBuilder->expr()->eq('appid', $queryBuilder->createNamedParameter('core')))
->andWhere($queryBuilder->expr()->eq('configkey', $queryBuilder->createNamedParameter('enabled')))
->andWhere($queryBuilder->expr()->eq('configvalue', $queryBuilder->createNamedParameter('false'), IQueryBuilder::PARAM_STR))
->andWhere($queryBuilder->expr()->in('gid', $queryBuilder->createNamedParameter($groups, IQueryBuilder::PARAM_STR_ARRAY)));
$result = $queryBuilder->execute();
$count = $result->fetchOne();
$result->closeCursor();
if ($count !== false) {
$count = (int)$count;
} else {
$count = 0;
}
return $count;
}
/**
* returns how many users have logged in once
*
* @return int
* @since 11.0.0
*/
public function countSeenUsers() {
$queryBuilder = \OC::$server->getDatabaseConnection()->getQueryBuilder();
$queryBuilder->select($queryBuilder->func()->count('*'))
->from('preferences')
->where($queryBuilder->expr()->eq('appid', $queryBuilder->createNamedParameter('login')))
->andWhere($queryBuilder->expr()->eq('configkey', $queryBuilder->createNamedParameter('lastLogin')))
->andWhere($queryBuilder->expr()->isNotNull('configvalue'));
$query = $queryBuilder->execute();
$result = (int)$query->fetchOne();
$query->closeCursor();
return $result;
}
/**
* @param \Closure $callback
* @psalm-param \Closure(\OCP\IUser):?bool $callback
* @since 11.0.0
*/
public function callForSeenUsers(\Closure $callback) {
$limit = 1000;
$offset = 0;
do {
$userIds = $this->getSeenUserIds($limit, $offset);
$offset += $limit;
foreach ($userIds as $userId) {
foreach ($this->backends as $backend) {
if ($backend->userExists($userId)) {
$user = $this->getUserObject($userId, $backend, false);
$return = $callback($user);
if ($return === false) {
return;
}
break;
}
}
}
} while (count($userIds) >= $limit);
}
/**
* Getting all userIds that have a listLogin value requires checking the
* value in php because on oracle you cannot use a clob in a where clause,
* preventing us from doing a not null or length(value) > 0 check.
*
* @param int $limit
* @param int $offset
* @return string[] with user ids
*/
private function getSeenUserIds($limit = null, $offset = null) {
$queryBuilder = \OC::$server->getDatabaseConnection()->getQueryBuilder();
$queryBuilder->select(['userid'])
->from('preferences')
->where($queryBuilder->expr()->eq(
'appid', $queryBuilder->createNamedParameter('login'))
)
->andWhere($queryBuilder->expr()->eq(
'configkey', $queryBuilder->createNamedParameter('lastLogin'))
)
->andWhere($queryBuilder->expr()->isNotNull('configvalue')
);
if ($limit !== null) {
$queryBuilder->setMaxResults($limit);
}
if ($offset !== null) {
$queryBuilder->setFirstResult($offset);
}
$query = $queryBuilder->execute();
$result = [];
while ($row = $query->fetch()) {
$result[] = $row['userid'];
}
$query->closeCursor();
return $result;
}
/**
* @param string $email
* @return IUser[]
* @since 9.1.0
*/
public function getByEmail($email) {
$userIds = $this->config->getUsersForUserValueCaseInsensitive('settings', 'email', $email);
$users = array_map(function ($uid) {
return $this->get($uid);
}, $userIds);
return array_values(array_filter($users, function ($u) {
return ($u instanceof IUser);
}));
}
private function verifyUid(string $uid): bool {
$appdata = 'appdata_' . $this->config->getSystemValueString('instanceid');
if (\in_array($uid, [
'.htaccess',
'files_external',
'__groupfolders',
'.ocdata',
'owncloud.log',
'nextcloud.log',
$appdata], true)) {
return false;
}
$dataDirectory = $this->config->getSystemValueString('datadirectory', \OC::$SERVERROOT . '/data');
return !file_exists(rtrim($dataDirectory, '/') . '/' . $uid);
}
}
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