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- <?php
- /**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Björn Schießle <bjoern@schiessle.org>
- * @author Christoph Wurst <christoph@winzerhof-wurst.at>
- * @author Joas Schilling <coding@schilljs.com>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Roeland Jago Douma <roeland@famdouma.nl>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Vincent Petry <vincent@nextcloud.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\Encryption;
- use OCP\Cache\CappedMemoryCache;
- use OCA\Files_External\Service\GlobalStoragesService;
- use OCP\App\IAppManager;
- use OCP\Files\IRootFolder;
- use OCP\Files\NotFoundException;
- use OCP\Share\IManager;
- class File implements \OCP\Encryption\IFile {
- protected Util $util;
- private IRootFolder $rootFolder;
- private IManager $shareManager;
- /**
- * Cache results of already checked folders
- * @var CappedMemoryCache<array>
- */
- protected CappedMemoryCache $cache;
- private ?IAppManager $appManager = null;
- public function __construct(Util $util,
- IRootFolder $rootFolder,
- IManager $shareManager) {
- $this->util = $util;
- $this->cache = new CappedMemoryCache();
- $this->rootFolder = $rootFolder;
- $this->shareManager = $shareManager;
- }
- public function getAppManager(): IAppManager {
- // Lazy evaluate app manager as it initialize the db too early otherwise
- if ($this->appManager) {
- return $this->appManager;
- }
- $this->appManager = \OCP\Server::get(IAppManager::class);
- return $this->appManager;
- }
- /**
- * Get list of users with access to the file
- *
- * @param string $path to the file
- * @return array{users: string[], public: bool}
- */
- public function getAccessList($path) {
- // Make sure that a share key is generated for the owner too
- [$owner, $ownerPath] = $this->util->getUidAndFilename($path);
- // always add owner to the list of users with access to the file
- $userIds = [$owner];
- if (!$this->util->isFile($owner . '/' . $ownerPath)) {
- return ['users' => $userIds, 'public' => false];
- }
- $ownerPath = substr($ownerPath, strlen('/files'));
- $userFolder = $this->rootFolder->getUserFolder($owner);
- try {
- $file = $userFolder->get($ownerPath);
- } catch (NotFoundException $e) {
- $file = null;
- }
- $ownerPath = $this->util->stripPartialFileExtension($ownerPath);
- // first get the shares for the parent and cache the result so that we don't
- // need to check all parents for every file
- $parent = dirname($ownerPath);
- $parentNode = $userFolder->get($parent);
- if (isset($this->cache[$parent])) {
- $resultForParents = $this->cache[$parent];
- } else {
- $resultForParents = $this->shareManager->getAccessList($parentNode);
- $this->cache[$parent] = $resultForParents;
- }
- $userIds = array_merge($userIds, $resultForParents['users']);
- $public = $resultForParents['public'] || $resultForParents['remote'];
- // Find out who, if anyone, is sharing the file
- if ($file !== null) {
- $resultForFile = $this->shareManager->getAccessList($file, false);
- $userIds = array_merge($userIds, $resultForFile['users']);
- $public = $resultForFile['public'] || $resultForFile['remote'] || $public;
- }
- // check if it is a group mount
- if ($this->getAppManager()->isEnabledForUser("files_external")) {
- /** @var GlobalStoragesService $storageService */
- $storageService = \OC::$server->get(GlobalStoragesService::class);
- $storages = $storageService->getAllStorages();
- foreach ($storages as $storage) {
- if ($storage->getMountPoint() == substr($ownerPath, 0, strlen($storage->getMountPoint()))) {
- $mountedFor = $this->util->getUserWithAccessToMountPoint($storage->getApplicableUsers(), $storage->getApplicableGroups());
- $userIds = array_merge($userIds, $mountedFor);
- }
- }
- }
- // Remove duplicate UIDs
- $uniqueUserIds = array_unique($userIds);
- return ['users' => $uniqueUserIds, 'public' => $public];
- }
- }
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