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<?php
declare(strict_types=1);
/**
* @copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCP\AppFramework;
use OCP\IRequest;
use OCP\ISession;
/**
* Base controller for public shares
*
* It will verify if the user is properly authenticated to the share. If not a 404
* is thrown by the PublicShareMiddleware.
*
* Use this for example for a controller that is not to be called via a webbrowser
* directly. For example a PublicPreviewController. As this is not meant to be
* called by a user directly.
*
* To show an auth page extend the AuthPublicShareController
*
* @since 14.0.0
*/
abstract class PublicShareController extends Controller {
/** @var ISession */
protected $session;
/** @var string */
private $token;
/**
* @since 14.0.0
*/
public function __construct(string $appName,
IRequest $request,
ISession $session) {
parent::__construct($appName, $request);
$this->session = $session;
}
/**
* Middleware set the token for the request
*
* @since 14.0.0
*/
final public function setToken(string $token) {
$this->token = $token;
}
/**
* Get the token for this request
*
* @since 14.0.0
*/
final public function getToken(): string {
return $this->token;
}
/**
* Get a hash of the password for this share
*
* To ensure access is blocked when the password to a share is changed we store
* a hash of the password for this token.
*
* @since 14.0.0
*/
abstract protected function getPasswordHash(): string;
/**
* Is the provided token a valid token
*
* This function is already called from the middleware directly after setting the token.
*
* @since 14.0.0
*/
abstract public function isValidToken(): bool;
/**
* Is a share with this token password protected
*
* @since 14.0.0
*/
abstract protected function isPasswordProtected(): bool;
/**
* Check if a share is authenticated or not
*
* @since 14.0.0
*/
public function isAuthenticated(): bool {
// Always authenticated against non password protected shares
if (!$this->isPasswordProtected()) {
return true;
}
// If we are authenticated properly
if ($this->session->get('public_link_authenticated_token') === $this->getToken() &&
$this->session->get('public_link_authenticated_password_hash') === $this->getPasswordHash()) {
return true;
}
// Fail by default if nothing matches
return false;
}
/**
* Function called if the share is not found.
*
* You can use this to do some logging for example
*
* @since 14.0.0
*/
public function shareNotFound() {
}
}
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