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<?php |
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/** |
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* @author Morris Jobke <[email protected]> |
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* @author Robin Appelman <[email protected]> |
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* @author Ilja Neumann <[email protected]> |
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* |
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* @copyright Copyright (c) 2018, ownCloud GmbH |
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* @license AGPL-3.0 |
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* |
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* This code 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, version 3, |
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* as published by the Free Software Foundation. |
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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, version 3, |
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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 OC\Files\Cache\Wrapper; |
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use OCP\Constants; |
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/** |
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* Works together with ReadOnlyJail class |
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* to allow file creation outside of users files dir. |
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* |
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* @package OC\Files\Cache\Wrapper |
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*/ |
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class ReadOnlyCachePermissionsMask extends CacheWrapper { |
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/** |
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* @var int |
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*/ |
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protected $mask; |
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/** |
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* System internal paths which should not be protected |
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* @var array |
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*/ |
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private $whitelist = [ |
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'uploads', |
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'cache', |
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'files_zsync' |
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]; |
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/** |
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* @param \OCP\Files\Cache\ICache $cache |
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* @param int $mask |
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*/ |
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public function __construct($cache, $mask) { |
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parent::__construct($cache); |
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$this->mask = $mask; |
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} |
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/** |
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* @param \OCP\Files\Cache\ICacheEntry $entry |
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* @return \OCP\Files\Cache\ICacheEntry |
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*/ |
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protected function formatCacheEntry($entry) { |
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$storageId = $entry->getStorageId(); |
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// Give all permissions to whitelisted "internal" paths and their |
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// subdirectories |
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if ($this->isHomeStorage($storageId)) { |
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foreach ($this->whitelist as $path) { |
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if ($this->startsWith($entry->getPath(), $path)) { |
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$entry['permissions'] = Constants::PERMISSION_ALL; |
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return $entry; |
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} |
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} |
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} |
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// Allow creation of skeleton files |
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if ($this->isHomeStorage($storageId) && $entry->getPath() === '') { |
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$entry['permissions'] = Constants::PERMISSION_CREATE; |
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$this->mask = Constants::PERMISSION_CREATE; |
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} |
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$entry['permissions'] &= $this->mask; |
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return $entry; |
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} |
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private function isHomeStorage($storageId) { |
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return \substr($storageId, 0, \strlen('home::')) === 'home::'; |
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} |
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private function startsWith($haystack, $needle) { |
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return (\substr($haystack, 0, \strlen($needle)) === $needle); |
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} |
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} |
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owncloud /
core
