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Diffstat (limited to 'system/libraries/Session/Session_driver.php')
| -rw-r--r-- | system/libraries/Session/Session_driver.php | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/system/libraries/Session/Session_driver.php b/system/libraries/Session/Session_driver.php new file mode 100644 index 000000000..24b4b465e --- /dev/null +++ b/system/libraries/Session/Session_driver.php @@ -0,0 +1,202 @@ +<?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; + } +} |