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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Copyright (c) 2022 Joas Schilling <[email protected]> |
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* |
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* @author Joas Schilling <[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\Files\Controller; |
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use OCA\Files\Db\OpenLocalEditor; |
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use OCA\Files\Db\OpenLocalEditorMapper; |
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use OCP\AppFramework\Db\DoesNotExistException; |
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use OCP\AppFramework\Http; |
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use OCP\AppFramework\Http\DataResponse; |
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use OCP\AppFramework\OCSController; |
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use OCP\AppFramework\Utility\ITimeFactory; |
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use OCP\DB\Exception; |
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use OCP\IRequest; |
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use OCP\Security\ISecureRandom; |
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use Psr\Log\LoggerInterface; |
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class OpenLocalEditorController extends OCSController { |
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public const TOKEN_LENGTH = 128; |
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public const TOKEN_DURATION = 600; // 10 Minutes |
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public const TOKEN_RETRIES = 50; |
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protected ITimeFactory $timeFactory; |
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protected OpenLocalEditorMapper $mapper; |
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protected ISecureRandom $secureRandom; |
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protected LoggerInterface $logger; |
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protected ?string $userId; |
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public function __construct( |
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string $appName, |
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IRequest $request, |
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ITimeFactory $timeFactory, |
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OpenLocalEditorMapper $mapper, |
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ISecureRandom $secureRandom, |
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LoggerInterface $logger, |
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?string $userId |
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) { |
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parent::__construct($appName, $request); |
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$this->timeFactory = $timeFactory; |
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$this->mapper = $mapper; |
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$this->secureRandom = $secureRandom; |
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$this->logger = $logger; |
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$this->userId = $userId; |
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} |
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/** |
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* @NoAdminRequired |
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* @UserRateThrottle(limit=10, period=120) |
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*/ |
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public function create(string $path): DataResponse { |
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$pathHash = sha1($path); |
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$entity = new OpenLocalEditor(); |
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$entity->setUserId($this->userId); |
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$entity->setPathHash($pathHash); |
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$entity->setExpirationTime($this->timeFactory->getTime() + self::TOKEN_DURATION); // Expire in 10 minutes |
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for ($i = 1; $i <= self::TOKEN_RETRIES; $i++) { |
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$token = $this->secureRandom->generate(self::TOKEN_LENGTH, ISecureRandom::CHAR_ALPHANUMERIC); |
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$entity->setToken($token); |
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try { |
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$this->mapper->insert($entity); |
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return new DataResponse([ |
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'userId' => $this->userId, |
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'pathHash' => $pathHash, |
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'expirationTime' => $entity->getExpirationTime(), |
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'token' => $entity->getToken(), |
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]); |
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} catch (Exception $e) { |
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if ($e->getCode() !== Exception::REASON_UNIQUE_CONSTRAINT_VIOLATION) { |
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// Only retry on unique constraint violation |
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throw $e; |
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} |
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} |
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} |
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$this->logger->error('Giving up after ' . self::TOKEN_RETRIES . ' retries to generate a unique local editor token for path hash: ' . $pathHash); |
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return new DataResponse([], Http::STATUS_INTERNAL_SERVER_ERROR); |
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} |
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/** |
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* @NoAdminRequired |
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* @BruteForceProtection(action=openLocalEditor) |
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*/ |
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public function validate(string $path, string $token): DataResponse { |
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$pathHash = sha1($path); |
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try { |
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$entity = $this->mapper->verifyToken($this->userId, $pathHash, $token); |
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} catch (DoesNotExistException $e) { |
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$response = new DataResponse([], Http::STATUS_NOT_FOUND); |
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$response->throttle(['userId' => $this->userId, 'pathHash' => $pathHash]); |
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return $response; |
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} |
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$this->mapper->delete($entity); |
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if ($entity->getExpirationTime() <= $this->timeFactory->getTime()) { |
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$response = new DataResponse([], Http::STATUS_NOT_FOUND); |
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$response->throttle(['userId' => $this->userId, 'pathHash' => $pathHash]); |
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return $response; |
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} |
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return new DataResponse([ |
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'userId' => $this->userId, |
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'pathHash' => $pathHash, |
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'expirationTime' => $entity->getExpirationTime(), |
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'token' => $entity->getToken(), |
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]); |
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} |
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} |
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nextcloud /
server
