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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2019 - 2022, CodeIgniter Foundation * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/) * @copyright Copyright (c) 2019 - 2022, CodeIgniter Foundation (https://codeigniter.com/) * @license https://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 3.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Session Driver Class * * @package CodeIgniter * @subpackage Libraries * @category Sessions * @author Andrey Andreev * @link https://codeigniter.com/userguide3/libraries/sessions.html */ abstract class CI_Session_driver { protected $_config; /** * Data fingerprint * * @var bool */ protected $_fingerprint; /** * Lock placeholder * * @var mixed */ protected $_lock = FALSE; /** * Read session ID * * Used to detect session_regenerate_id() calls because PHP only calls * write() after regenerating the ID. * * @var string */ protected $_session_id; /** * Success and failure return values * * Necessary due to a bug in all PHP 5 versions where return values * from userspace handlers are not handled properly. PHP 7 fixes the * bug, so we need to return different values depending on the version. * * @see https://wiki.php.net/rfc/session.user.return-value * @var mixed */ protected $_success, $_failure; // ------------------------------------------------------------------------ /** * Class constructor * * @param array $params Configuration parameters * @return void */ public function __construct(&$params) { $this->_config =& $params; if (is_php('7')) { $this->_success = TRUE; $this->_failure = FALSE; } else { $this->_success = 0; $this->_failure = -1; } } // ------------------------------------------------------------------------ /** * PHP 5.x validate ID * * Enforces session.use_strict_mode * * @return void */ public function php5_validate_id() { if ($this->_success === 0 && isset($_COOKIE[$this->_config['cookie_name']]) && ! $this->validateId($_COOKIE[$this->_config['cookie_name']])) { unset($_COOKIE[$this->_config['cookie_name']]); } } // ------------------------------------------------------------------------ /** * Cookie destroy * * Internal method to force removal of a cookie by the client * when session_destroy() is called. * * @return bool */ protected function _cookie_destroy() { if ( ! is_php('7.3')) { $header = 'Set-Cookie: '.$this->_config['cookie_name'].'='; $header .= '; Expires='.gmdate('D, d-M-Y H:i:s T', 1).'; Max-Age=-1'; $header .= '; Path='.$this->_config['cookie_path']; $header .= ($this->_config['cookie_domain'] !== '' ? '; Domain='.$this->_config['cookie_domain'] : ''); $header .= ($this->_config['cookie_secure'] ? '; Secure' : '').'; HttpOnly; SameSite='.$this->_config['cookie_samesite']; header($header); return; } return setcookie( $this->_config['cookie_name'], '', array( 'expires' => 1, 'path' => $this->_config['cookie_path'], 'domain' => $this->_config['cookie_domain'], 'secure' => $this->_config['cookie_secure'], 'httponly' => TRUE, 'samesite' => $this->_config['cookie_samesite'] ) ); } // ------------------------------------------------------------------------ /** * Get lock * * A dummy method allowing drivers with no locking functionality * (databases other than PostgreSQL and MySQL) to act as if they * do acquire a lock. * * @param string $session_id * @return bool */ protected function _get_lock($session_id) { $this->_lock = TRUE; return TRUE; } // ------------------------------------------------------------------------ /** * Release lock * * @return bool */ protected function _release_lock() { if ($this->_lock) { $this->_lock = FALSE; } return TRUE; } }