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<?php |
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/** |
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* @copyright Copyright (c) 2016 Morris Jobke <[email protected]> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program 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 as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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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 |
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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\FilesAccessControl; |
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use OCP\Files\ForbiddenException; |
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use OCP\WorkflowEngine\IManager; |
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class Operation { |
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/** |
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* AccessControl constructor. |
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* |
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* @param IManager $manager |
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*/ |
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public function __construct(IManager $manager) { |
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$this->manager = $manager; |
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} |
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/** |
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* @param StorageWrapper $storage |
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* @param string $path |
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* @throws ForbiddenException |
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*/ |
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public function checkFileAccess(StorageWrapper $storage, $path) { |
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if (!$this->isUserFileOrThumbnail($storage, $path) || $this->isCreatingSkeletonFiles()) { |
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// Allow creating skeletons and theming |
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// https://github.com/nextcloud/files_accesscontrol/issues/5 |
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// https://github.com/nextcloud/files_accesscontrol/issues/12 |
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return; |
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} |
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$this->manager->setFileInfo($storage, $path); |
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$match = $this->manager->getMatchingOperations('OCA\FilesAccessControl\Operation'); |
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if (!empty($match)) { |
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// All Checks of one operation matched: prevent access |
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throw new ForbiddenException('Access denied', true); |
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} |
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} |
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/** |
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* @param StorageWrapper $storage |
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* @param string $path |
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* @return bool |
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*/ |
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protected function isUserFileOrThumbnail(StorageWrapper $storage, $path) { |
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$fullPath = $storage->mountPoint . $path; |
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if (substr_count($fullPath, '/') < 3) { |
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return false; |
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} |
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// '', admin, 'files', 'path/to/file.txt' |
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$segment = explode('/', $fullPath, 4); |
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return isset($segment[2]) && in_array($segment[2], ['files', 'thumbnails']); |
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} |
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/** |
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* Check if we are in the LoginController and if so, ignore the firewall |
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* @return bool |
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*/ |
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protected function isCreatingSkeletonFiles() { |
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$exception = new \Exception(); |
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$trace = $exception->getTrace(); |
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foreach ($trace as $step) { |
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if (array_key_exists('class', $step) && |
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array_key_exists('function', $step) && |
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$step['class'] === 'OC\Core\Controller\LoginController' && |
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$step['function'] === 'tryLogin') { |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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nextcloud /
files_accesscontrol
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: