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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author cetra3 <peter@parashift.com.au>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author MartB <mart.b@outlook.de>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Victor Dubiniuk <dubiniuk@owncloud.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\Session;
use OC\Authentication\Exceptions\InvalidTokenException;
use OC\Authentication\Token\IProvider;
use OCP\Session\Exceptions\SessionNotAvailableException;
/**
* Class Internal
*
* wrap php's internal session handling into the Session interface
*
* @package OC\Session
*/
class Internal extends Session {
/**
* @param string $name
* @throws \Exception
*/
public function __construct(string $name) {
set_error_handler([$this, 'trapError']);
$this->invoke('session_name', [$name]);
try {
$this->startSession();
} catch (\Exception $e) {
setcookie($this->invoke('session_name'), '', -1, \OC::$WEBROOT ?: '/');
}
restore_error_handler();
if (!isset($_SESSION)) {
throw new \Exception('Failed to start session');
}
}
/**
* @param string $key
* @param integer $value
*/
public function set(string $key, $value) {
$this->validateSession();
$_SESSION[$key] = $value;
}
/**
* @param string $key
* @return mixed
*/
public function get(string $key) {
if (!$this->exists($key)) {
return null;
}
return $_SESSION[$key];
}
/**
* @param string $key
* @return bool
*/
public function exists(string $key): bool {
return isset($_SESSION[$key]);
}
/**
* @param string $key
*/
public function remove(string $key) {
if (isset($_SESSION[$key])) {
unset($_SESSION[$key]);
}
}
public function clear() {
$this->invoke('session_unset');
$this->regenerateId();
$this->startSession();
$_SESSION = [];
}
public function close() {
$this->invoke('session_write_close');
parent::close();
}
/**
* Wrapper around session_regenerate_id
*
* @param bool $deleteOldSession Whether to delete the old associated session file or not.
* @param bool $updateToken Wheater to update the associated auth token
* @return void
*/
public function regenerateId(bool $deleteOldSession = true, bool $updateToken = false) {
$oldId = null;
if ($updateToken) {
// Get the old id to update the token
try {
$oldId = $this->getId();
} catch (SessionNotAvailableException $e) {
// We can't update a token if there is no previous id
$updateToken = false;
}
}
try {
@session_regenerate_id($deleteOldSession);
} catch (\Error $e) {
$this->trapError($e->getCode(), $e->getMessage());
}
if ($updateToken) {
// Get the new id to update the token
$newId = $this->getId();
/** @var IProvider $tokenProvider */
$tokenProvider = \OC::$server->query(IProvider::class);
try {
$tokenProvider->renewSessionToken($oldId, $newId);
} catch (InvalidTokenException $e) {
// Just ignore
}
}
}
/**
* Wrapper around session_id
*
* @return string
* @throws SessionNotAvailableException
* @since 9.1.0
*/
public function getId(): string {
$id = $this->invoke('session_id', [], true);
if ($id === '') {
throw new SessionNotAvailableException();
}
return $id;
}
/**
* @throws \Exception
*/
public function reopen() {
throw new \Exception('The session cannot be reopened - reopen() is ony to be used in unit testing.');
}
/**
* @param int $errorNumber
* @param string $errorString
* @throws \ErrorException
*/
public function trapError(int $errorNumber, string $errorString) {
throw new \ErrorException($errorString);
}
/**
* @throws \Exception
*/
private function validateSession() {
if ($this->sessionClosed) {
throw new SessionNotAvailableException('Session has been closed - no further changes to the session are allowed');
}
}
/**
* @param string $functionName the full session_* function name
* @param array $parameters
* @param bool $silence whether to suppress warnings
* @throws \ErrorException via trapError
* @return mixed
*/
private function invoke(string $functionName, array $parameters = [], bool $silence = false) {
try {
if ($silence) {
return @call_user_func_array($functionName, $parameters);
} else {
return call_user_func_array($functionName, $parameters);
}
} catch (\Error $e) {
$this->trapError($e->getCode(), $e->getMessage());
}
}
private function startSession() {
if (PHP_VERSION_ID < 70300) {
$this->invoke('session_start');
} else {
$this->invoke('session_start', [['cookie_samesite' => 'Lax']]);
}
}
}
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