mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
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ab2a8800a2
git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@4408 3807eeeb-6ff5-0310-8944-8be069107fe0
601 lines
15 KiB
PHP
601 lines
15 KiB
PHP
<?php
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/* SVN FILE: $Id$ */
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/**
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* Session class for Cake.
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*
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* Cake abstracts the handling of sessions.
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* There are several convenient methods to access session information.
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* This class is the implementation of those methods.
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* They are mostly used by the Session Component.
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework <http://www.cakephp.org/>
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* Copyright 2005-2007, Cake Software Foundation, Inc.
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* 1785 E. Sahara Avenue, Suite 490-204
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* Las Vegas, Nevada 89104
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @filesource
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* @copyright Copyright 2005-2007, Cake Software Foundation, Inc.
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* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs
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* @since CakePHP(tm) v .0.10.0.1222
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* @version $Revision$
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* @modifiedby $LastChangedBy$
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* @lastmodified $Date$
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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*/
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/**
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* Database name for cake sessions.
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*
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*/
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if (!defined('CAKE_SESSION_TABLE')) {
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define('CAKE_SESSION_TABLE', 'cake_sessions');
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}
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if (CAKE_SESSION_SAVE === 'database') {
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uses('model' . DS . 'connection_manager');
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}
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/**
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* Session class for Cake.
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*
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* Cake abstracts the handling of sessions. There are several convenient methods to access session information.
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* This class is the implementation of those methods. They are mostly used by the Session Component.
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*
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* @package cake
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* @subpackage cake.cake.libs
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*/
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class CakeSession extends Object {
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/**
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* True if the Session is still valid
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*
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* @var boolean
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* @access public
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*/
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var $valid = false;
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/**
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* Error messages for this session
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*
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* @var array
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* @access public
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*/
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var $error = false;
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/**
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* User agent string
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*
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* @var string
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* @access protected
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*/
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var $_userAgent = false;
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/**
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* Path to where the session is active.
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*
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* @var string
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* @access public
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*/
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var $path = false;
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/**
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* Error number of last occurred error
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*
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* @var integer
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* @access public
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*/
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var $lastError = null;
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/**
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* CAKE_SECURITY setting, "high", "medium", or "low".
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*
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* @var string
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* @access public
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*/
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var $security = null;
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/**
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* Start time for this session.
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*
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* @var integer
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* @access public
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*/
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var $time = false;
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/**
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* Time when this session becomes invalid.
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*
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* @var integer
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* @access public
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*/
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var $sessionTime = false;
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/**
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* Constructor.
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*
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* @param string $base The base path for the Session
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* @param boolean $start
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* @access public
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*/
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function __construct($base = null, $start = true) {
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if($start === true) {
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$this->host = env('HTTP_HOST');
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if (empty($base) || strpos($base, '?')) {
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$this->path = '/';
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} else {
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$this->path = $base;
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}
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if (strpos($this->host, ':') !== false) {
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$this->host = substr($this->host, 0, strpos($this->host, ':'));
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}
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if (env('HTTP_USER_AGENT') != null) {
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$this->_userAgent = md5(env('HTTP_USER_AGENT') . CAKE_SESSION_STRING);
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} else {
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$this->_userAgent = "";
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}
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$this->time = time();
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$this->sessionTime = $this->time + (Security::inactiveMins() * CAKE_SESSION_TIMEOUT);
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$this->security = CAKE_SECURITY;
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if (function_exists('session_write_close')) {
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session_write_close();
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}
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$this->__initSession();
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session_cache_limiter ("must-revalidate");
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session_start();
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header ('P3P: CP="NOI ADM DEV PSAi COM NAV OUR OTRo STP IND DEM"');
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$this->__checkValid();
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}
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parent::__construct();
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}
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/**
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* Returns true if given variable is set in session.
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*
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* @param string $name Variable name to check for
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* @return boolean True if variable is there
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* @access public
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*/
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function checkSessionVar($name) {
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$var = $this->__sessionVarNames($name);
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if (empty($var)) {
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return false;
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}
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$expression = "return isset(" . $var . ");";
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return eval($expression);
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}
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/**
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* Removes a variable from session.
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*
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* @param string $name Session variable to remove
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* @return boolean Success
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* @access public
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*/
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function delSessionVar($name) {
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if ($this->checkSessionVar($name)) {
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$var = $this->__sessionVarNames($name);
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if (empty($var)) {
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return false;
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}
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eval ("unset($var);");
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return true;
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}
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$this->__setError(2, "$name doesn't exist");
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return false;
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}
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/**
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* Return error description for given error number.
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*
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* @param int $errorNumber
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* @return string Error as string
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* @access public
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*/
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function getError($errorNumber) {
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if (!is_array($this->error) || !array_key_exists($errorNumber, $this->error)) {
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return false;
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} else {
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return $this->error[$errorNumber];
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}
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}
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/**
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* Returns last occurred error as a string, if any.
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*
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* @return mixed Error description as a string, or false.
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* @access public
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*/
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function getLastError() {
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if ($this->lastError) {
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return $this->getError($this->lastError);
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} else {
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return false;
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}
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}
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/**
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* Returns true if session is valid.
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*
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* @return boolean
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* @access public
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*/
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function isValid() {
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return $this->valid;
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}
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/**
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* Returns given session variable, or all of them, if no parameters given.
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*
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* @param mixed $name The name of the session variable
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* @return mixed The value of the session variable
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* @access public
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*/
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function readSessionVar($name = null) {
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if (is_null($name)) {
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return $this->returnSessionVars();
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}
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if ($this->checkSessionVar($name)) {
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$var = $this->__sessionVarNames($name);
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if (empty($var)) {
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return false;
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}
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$result = eval("return " . $var . ";");
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return $result;
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}
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$this->__setError(2, "$name doesn't exist");
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$return = null;
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return $return;
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}
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/**
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* Returns all session variables.
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*
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* @return mixed Full $_SESSION array, or false on error.
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* @access public
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*/
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function returnSessionVars() {
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if (!empty($_SESSION)) {
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$result = eval("return \$_SESSION;");
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return $result;
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}
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$this->__setError(2, "No Session vars set");
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return false;
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}
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/**
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* Writes value to given session variable name.
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*
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* @param mixed $name
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* @param string $value
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* @return void
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*/
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function writeSessionVar($name, $value) {
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$var = $this->__sessionVarNames($name);
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if (empty($var)) {
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return false;
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}
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$expression = $var . " = \$value;";
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eval ($expression);
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}
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/**
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* Method called on close of a database
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* session
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*
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* @return boolean
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* @access private
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*/
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function __close() {
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return true;
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}
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/**
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* Method called on the destruction of a
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* database session
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*
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* @param integer $key
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* @return boolean
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* @access private
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*/
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function __destroy($key) {
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$db =& ConnectionManager::getDataSource('default');
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$table = $db->fullTableName(CAKE_SESSION_TABLE);
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$db->execute("DELETE FROM " . $db->name($table) . " WHERE " . $db->name($table.'.id') . " = " . $db->value($key, 'integer'));
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return true;
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}
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/**
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* Helper method to destroy invalid sessions.
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*
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* @return void
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* @access private
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*/
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function destroyInvalid() {
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$sessionpath = session_save_path();
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if (empty($sessionpath)) {
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$sessionpath = "/tmp";
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}
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if (isset($_COOKIE[session_name()])) {
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setcookie(CAKE_SESSION_COOKIE, '', time() - 42000, $this->path);
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}
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$file = $sessionpath . DS . "sess_" . session_id();
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@session_destroy();
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@unlink ($file);
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$this->__construct($this->path);
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$this->renew();
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}
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/**
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* Helper function called on gc for
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* database sessions
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*
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* @param unknown_type $expires
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* @return boolean
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* @access private
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*/
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function __gc($expires) {
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$db =& ConnectionManager::getDataSource('default');
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$table = $db->fullTableName(CAKE_SESSION_TABLE);
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$db->execute("DELETE FROM " . $db->name($table) . " WHERE " . $db->name($table.'.expires') . " < ". $db->value(time()));
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return true;
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}
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/**
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* Helper method to initialize a session, based on Cake core settings.
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*
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* @return void
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* @access private
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*/
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function __initSession() {
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switch($this->security) {
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case 'high':
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$this->cookieLifeTime=0;
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if (function_exists('ini_set')) {
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ini_set('session.referer_check', $this->host);
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}
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break;
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case 'medium':
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$this->cookieLifeTime = 7 * 86400;
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break;
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case 'low':
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default:
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$this->cookieLifeTime = 788940000;
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break;
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}
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switch(CAKE_SESSION_SAVE) {
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case 'cake':
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if (!isset($_SESSION)) {
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if (function_exists('ini_set')) {
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ini_set('session.use_trans_sid', 0);
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ini_set('url_rewriter.tags', '');
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ini_set('session.serialize_handler', 'php');
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ini_set('session.use_cookies', 1);
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ini_set('session.name', CAKE_SESSION_COOKIE);
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ini_set('session.cookie_lifetime', $this->cookieLifeTime);
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ini_set('session.cookie_path', $this->path);
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ini_set('session.gc_probability', 1);
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ini_set('session.auto_start', 0);
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ini_set('session.save_path', TMP . 'sessions');
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}
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}
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break;
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case 'database':
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if (!isset($_SESSION)) {
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if (function_exists('ini_set')) {
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ini_set('session.use_trans_sid', 0);
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ini_set('url_rewriter.tags', '');
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ini_set('session.save_handler', 'user');
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ini_set('session.serialize_handler', 'php');
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ini_set('session.use_cookies', 1);
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ini_set('session.name', CAKE_SESSION_COOKIE);
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ini_set('session.cookie_lifetime', $this->cookieLifeTime);
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ini_set('session.cookie_path', $this->path);
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ini_set('session.gc_probability', 1);
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ini_set('session.auto_start', 0);
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}
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}
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session_set_save_handler(array('CakeSession','__open'),
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array('CakeSession', '__close'),
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array('CakeSession', '__read'),
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array('CakeSession', '__write'),
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array('CakeSession', '__destroy'),
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array('CakeSession', '__gc'));
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break;
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case 'php':
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if (!isset($_SESSION)) {
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if (function_exists('ini_set')) {
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ini_set('session.use_trans_sid', 0);
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ini_set('session.name', CAKE_SESSION_COOKIE);
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ini_set('session.cookie_lifetime', $this->cookieLifeTime);
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ini_set('session.cookie_path', $this->path);
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ini_set('session.gc_probability', 1);
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}
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}
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break;
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default:
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if (!isset($_SESSION)) {
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$config = CONFIGS . CAKE_SESSION_SAVE . '.php';
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if (is_file($config)) {
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require_once ($config);
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}
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}
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break;
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}
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}
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/**
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* Helper method to create a new session.
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*
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* @return void
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* @access private
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*
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*/
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function __checkValid() {
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if ($this->readSessionVar("Config")) {
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if ($this->_userAgent == $this->readSessionVar("Config.userAgent") && $this->time <= $this->readSessionVar("Config.time")) {
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$this->writeSessionVar("Config.time", $this->sessionTime);
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$this->valid = true;
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} else {
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$this->valid = false;
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$this->__setError(1, "Session Highjacking Attempted !!!");
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$this->destroyInvalid();
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}
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} else {
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srand ((double)microtime() * 1000000);
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$this->writeSessionVar('Config.rand', rand());
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$this->writeSessionVar("Config.time", $this->sessionTime);
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$this->writeSessionVar("Config.userAgent", $this->_userAgent);
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$this->valid = true;
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$this->__setError(1, "Session is valid");
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}
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}
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/**
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* Method called on open of a database
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* sesson
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*
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* @return boolean
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* @access private
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*
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*/
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function __open() {
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return true;
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}
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/**
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* Method used to read from a database
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* session
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*
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* @param mixed $key The key of the value to read
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* @return mixed The value of the key or false if it does not exist
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* @access private
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*/
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function __read($key) {
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$db =& ConnectionManager::getDataSource('default');
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$table = $db->fullTableName(CAKE_SESSION_TABLE, false);
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$row = $db->query("SELECT " . $db->name($table.'.data') . " FROM " . $db->name($table) . " WHERE " . $db->name($table.'.id') . " = " . $db->value($key), false);
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if ($row && !isset($row[0][$table]) && isset($row[0][0])) {
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$table = 0;
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}
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if ($row && $row[0][$table]['data']) {
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return $row[0][$table]['data'];
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} else {
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return false;
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}
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}
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/**
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* Helper method to restart a session.
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*
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* @return void
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* @access private
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*/
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function __regenerateId() {
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$oldSessionId = session_id();
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$sessionpath = session_save_path();
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if (empty($sessionpath)) {
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$sessionpath = "/tmp";
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}
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if (isset($_COOKIE[session_name()])) {
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setcookie(CAKE_SESSION_COOKIE, '', time() - 42000, $this->path);
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}
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session_regenerate_id();
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$newSessid = session_id();
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$file = $sessionpath . DS . "sess_$oldSessionId";
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@unlink ($file);
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@session_destroy ($oldSessionId);
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if (function_exists('session_write_close')) {
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session_write_close();
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}
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$this->__initSession();
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session_id ($newSessid);
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session_start();
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}
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/**
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* Restarts this session.
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*
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* @return void
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* @access public
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*/
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function renew() {
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$this->__regenerateId();
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}
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/**
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* Helper method to extract variable names from the session
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* variable
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*
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* @param mixed $name Variable names as array or string.
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* @return string The expression to eval to get the value or false
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* @access private
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*/
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function __sessionVarNames($name) {
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if (is_string($name) && preg_match("/^[0-9a-zA-Z._-]+$/", $name)) {
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if (strpos($name, ".")) {
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$names = explode(".", $name);
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} else {
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$names = array($name);
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}
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$expression="\$_SESSION";
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foreach($names as $item) {
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$expression .= is_numeric($item) ? "[$item]" : "['$item']";
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}
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return $expression;
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}
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$this->__setError(3, "$name is not a string");
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return false;
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}
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/**
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* Helper method to set an internal error message.
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*
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* @param int $errorNumber Number of the error
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* @param string $errorMessage Description of the error
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* @return void
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* @access private
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*/
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function __setError($errorNumber, $errorMessage) {
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if ($this->error === false) {
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$this->error = array();
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}
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$this->error[$errorNumber] = $errorMessage;
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$this->lastError = $errorNumber;
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}
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/**
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* Helper function called on write for database
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* sessions
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*
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* @param mixed $key The name of the var
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* @param mixed $value The value of the var
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* @return boolean
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* @access private
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*/
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function __write($key, $value) {
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$db =& ConnectionManager::getDataSource('default');
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$table = $db->fullTableName(CAKE_SESSION_TABLE);
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switch(CAKE_SECURITY) {
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case 'high':
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$factor = 10;
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break;
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case 'medium':
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$factor = 100;
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break;
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case 'low':
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$factor = 300;
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break;
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default:
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$factor = 10;
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break;
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}
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$expires = time() + CAKE_SESSION_TIMEOUT * $factor;
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$row = $db->query("SELECT COUNT(id) AS count FROM " . $db->name($table) . " WHERE "
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. $db->name('id') . " = "
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. $db->value($key), false);
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if ($row[0][0]['count'] > 0) {
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$db->execute("UPDATE " . $db->name($table) . " SET " . $db->name('data') . " = "
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. $db->value($value) . ", " . $db->name('expires') . " = "
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. $db->value($expires) . " WHERE " . $db->name('id') . " = "
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. $db->value($key));
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} else {
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$db->execute("INSERT INTO " . $db->name($table) . " (" . $db->name('data') . ","
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. $db->name('expires') . "," . $db->name('id')
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. ") VALUES (" . $db->value($value) . ", " . $db->value($expires) . ", "
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. $db->value($key) . ")");
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}
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return true;
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}
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}
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?>
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