diff options
Diffstat (limited to 'system/libraries/Session')
-rwxr-xr-x | system/libraries/Session/Session.php | 25 | ||||
-rwxr-xr-x | system/libraries/Session/drivers/Session_cookie.php | 413 |
2 files changed, 316 insertions, 122 deletions
diff --git a/system/libraries/Session/Session.php b/system/libraries/Session/Session.php index 7c340ccca..94fb4b10a 100755 --- a/system/libraries/Session/Session.php +++ b/system/libraries/Session/Session.php @@ -197,6 +197,27 @@ class CI_Session extends CI_Driver_Library { } /** + * Fetch all flashdata + * + * @return array Flash data array + */ + public function all_flashdata() + { + $out = array(); + + // loop through all userdata + foreach ($this->all_userdata() as $key => $val) + { + // if it contains flashdata, add it + if (strpos($key, self::FLASHDATA_KEY.self::FLASHDATA_OLD) !== FALSE) + { + $out[$key] = $val; + } + } + return $out; + } + + /** * Add or change data in the "userdata" array * * @param mixed Item name or array of items @@ -297,8 +318,8 @@ class CI_Session extends CI_Driver_Library { */ public function keep_flashdata($key) { - // 'old' flashdata gets removed. Here we mark all - // flashdata as 'new' to preserve it from _flashdata_sweep() + // 'old' flashdata gets removed. Here we mark all flashdata as 'new' to preserve it from _flashdata_sweep() + // Note the function will return NULL if the $key provided cannot be found $old_flashdata_key = self::FLASHDATA_KEY.self::FLASHDATA_OLD.$key; $value = $this->userdata($old_flashdata_key); diff --git a/system/libraries/Session/drivers/Session_cookie.php b/system/libraries/Session/drivers/Session_cookie.php index 696105bc6..0dc109bd1 100755 --- a/system/libraries/Session/drivers/Session_cookie.php +++ b/system/libraries/Session/drivers/Session_cookie.php @@ -1,19 +1,30 @@ -<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); +<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); /** * CodeIgniter * - * An open source application development framework for PHP 5.1.6 or newer + * An open source application development framework for PHP 5.2.4 or newer + * + * NOTICE OF LICENSE + * + * Licensed under the Open Software License version 3.0 + * + * This source file is subject to the Open Software License (OSL 3.0) that is + * bundled with this package in the files license.txt / license.rst. It is + * also available through the world wide web at this URL: + * http://opensource.org/licenses/OSL-3.0 + * If you did not receive a copy of the license and are unable to obtain it + * through the world wide web, please send an email to + * licensing@ellislab.com so we can send you a copy immediately. * * @package CodeIgniter - * @author ExpressionEngine Dev Team - * @copyright Copyright (c) 2008 - 2010, EllisLab, Inc. - * @license http://codeigniter.com/user_guide/license.html + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/) + * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) * @link http://codeigniter.com - * @since Version 2.0 + * @since Version 1.0 * @filesource */ - /** * Cookie-based session management driver * @@ -24,29 +35,144 @@ * @package CodeIgniter * @subpackage Libraries * @category Sessions - * @author ExpressionEngine Dev Team + * @author EllisLab Dev Team + * @link http://codeigniter.com/user_guide/libraries/sessions.html */ class CI_Session_cookie extends CI_Session_driver { - protected $sess_encrypt_cookie = FALSE; - protected $sess_use_database = FALSE; - protected $sess_table_name = ''; - protected $sess_expiration = 7200; - protected $sess_expire_on_close = FALSE; - protected $sess_match_ip = FALSE; - protected $sess_match_useragent = TRUE; - protected $sess_cookie_name = 'ci_session'; - protected $cookie_prefix = ''; - protected $cookie_path = ''; - protected $cookie_domain = ''; - protected $cookie_secure = FALSE; - protected $sess_time_to_update = 300; - protected $encryption_key = ''; - protected $time_reference = 'time'; - protected $userdata = array(); - protected $CI = null; - protected $now = 0; - - const gc_probability = 5; + + /** + * Whether to encrypt the session cookie + * + * @var bool + */ + public $sess_encrypt_cookie = FALSE; + + /** + * Whether to use to the database for session storage + * + * @var bool + */ + public $sess_use_database = FALSE; + + /** + * Name of the database table in which to store sessions + * + * @var string + */ + public $sess_table_name = ''; + + /** + * Length of time (in seconds) for sessions to expire + * + * @var int + */ + public $sess_expiration = 7200; + + /** + * Whether to kill session on close of browser window + * + * @var bool + */ + public $sess_expire_on_close = FALSE; + + /** + * Whether to match session on ip address + * + * @var bool + */ + public $sess_match_ip = FALSE; + + /** + * Whether to match session on user-agent + * + * @var bool + */ + public $sess_match_useragent = TRUE; + + /** + * Name of session cookie + * + * @var string + */ + public $sess_cookie_name = 'ci_session'; + + /** + * Session cookie prefix + * + * @var string + */ + public $cookie_prefix = ''; + + /** + * Session cookie path + * + * @var string + */ + public $cookie_path = ''; + + /** + * Session cookie domain + * + * @var string + */ + public $cookie_domain = ''; + + /** + * Whether to set the cookie only on HTTPS connections + * + * @var bool + */ + public $cookie_secure = FALSE; + + /** + * Whether cookie should be allowed only to be sent by the server + * + * @var bool + */ + public $cookie_httponly = FALSE; + + /** + * Interval at which to update session + * + * @var int + */ + public $sess_time_to_update = 300; + + /** + * Key with which to encrypt the session cookie + * + * @var string + */ + public $encryption_key = ''; + + /** + * Timezone to use for the current time + * + * @var string + */ + public $time_reference = 'local'; + + + /** + * Session data + * + * @var array + */ + public $userdata = array(); + + /** + * Reference to CodeIgniter instance + * + * @var object + */ + public $CI; + + /** + * Current time + * + * @var int + */ + public $now; /** * Initialize session driver object @@ -63,15 +189,16 @@ class CI_Session_cookie extends CI_Session_driver { // manually via the $params array above or via the config file foreach (array('sess_encrypt_cookie', 'sess_use_database', 'sess_table_name', 'sess_expiration', 'sess_expire_on_close', 'sess_match_ip', 'sess_match_useragent', 'sess_cookie_name', 'cookie_path', - 'cookie_domain', 'cookie_secure', 'sess_time_to_update', 'time_reference', 'cookie_prefix', 'encryption_key') - as $key) + 'cookie_domain', 'cookie_secure', 'cookie_httponly', 'sess_time_to_update', 'time_reference', 'cookie_prefix', + 'encryption_key') as $key) { - $this->$key = (isset($this->parent->params[$key])) ? $this->parent->params[$key] : $this->CI->config->item($key); + $this->$key = isset($this->parent->params[$key]) ? $this->parent->params[$key] : + $this->CI->config->item($key); } - if ($this->encryption_key == '') + if ($this->encryption_key === '') { - show_error('In order to use the Cookie Session driver you are required to set an encryption key '. + show_error('In order to use the Session Cookie driver you are required to set an encryption key '. 'in your config file.'); } @@ -79,13 +206,13 @@ class CI_Session_cookie extends CI_Session_driver { $this->CI->load->helper('string'); // Do we need encryption? If so, load the encryption class - if ($this->sess_encrypt_cookie == TRUE) + if ($this->sess_encrypt_cookie === TRUE) { $this->CI->load->library('encrypt'); } // Are we using a database? If so, load it - if ($this->sess_use_database === TRUE && $this->sess_table_name != '') + if ($this->sess_use_database === TRUE && $this->sess_table_name !== '') { $this->CI->load->database(); } @@ -96,7 +223,7 @@ class CI_Session_cookie extends CI_Session_driver { // Set the session length. If the session expiration is // set to zero we'll set the expiration two years from now. - if ($this->sess_expiration == 0) + if ($this->sess_expiration === 0) { $this->sess_expiration = (60*60*24*365*2); } @@ -143,7 +270,7 @@ class CI_Session_cookie extends CI_Session_driver { foreach (array('session_id','ip_address','user_agent','last_activity') as $val) { unset($custom_userdata[$val]); - $cookie_userdata[$val] = $this->userdata($val); + $cookie_userdata[$val] = $this->userdata[$val]; } // Did we find any custom data? If not, we turn the empty array into a string @@ -159,9 +286,9 @@ class CI_Session_cookie extends CI_Session_driver { } // Run the update query - $this->CI->db->where('session_id', $this->userdata('session_id')); + $this->CI->db->where('session_id', $this->userdata['session_id']); $this->CI->db->update($this->sess_table_name, - array('last_activity' => $this->userdata('last_activity'), 'user_data' => $custom_userdata)); + array('last_activity' => $this->userdata['last_activity'], 'user_data' => $custom_userdata)); // Write the cookie. Notice that we manually pass the cookie data array to the // _set_cookie() function. Normally that function will store $this->userdata, but @@ -186,6 +313,9 @@ class CI_Session_cookie extends CI_Session_driver { // Kill the cookie setcookie($this->sess_cookie_name, addslashes(serialize(array())), ($this->now - 31500000), $this->cookie_path, $this->cookie_domain, 0); + + // Kill session data + $this->userdata = array(); } /** @@ -235,21 +365,21 @@ class CI_Session_cookie extends CI_Session_driver { $session = $this->CI->input->cookie($this->sess_cookie_name); // No cookie? Goodbye cruel world!... - if ($session === FALSE) + if ($session === NULL) { log_message('debug', 'A session cookie was not found.'); return FALSE; } // Decrypt the cookie data - if ($this->sess_encrypt_cookie == TRUE) + if ($this->sess_encrypt_cookie === TRUE) { $session = $this->CI->encrypt->decode($session); } else { // encryption was not used, so we need to check the md5 hash - $hash = substr($session, strlen($session)-32); // get last 32 chars + $hash = substr($session, strlen($session)-32); // get last 32 chars $session = substr($session, 0, strlen($session)-32); // Does the md5 hash match? This is to prevent manipulation of session data in userspace @@ -266,30 +396,30 @@ class CI_Session_cookie extends CI_Session_driver { $session = $this->_unserialize($session); // Is the session data we unserialized an array with the correct format? - if ( ! is_array($session) || ! isset($session['session_id']) || ! isset($session['ip_address']) || - ! isset($session['user_agent']) || ! isset($session['last_activity'])) + if ( ! is_array($session) || ! isset($session['session_id'], $session['ip_address'], $session['user_agent'], + $session['last_activity'])) { $this->sess_destroy(); return FALSE; } // Is the session current? - if (($session['last_activity'] + $this->sess_expiration) < $this->now()) + if (($session['last_activity'] + $this->sess_expiration) < $this->now) { $this->sess_destroy(); return FALSE; } - // Does the IP Match? - if ($this->sess_match_ip == TRUE && $session['ip_address'] != $this->CI->input->ip_address()) + // Does the IP match? + if ($this->sess_match_ip === TRUE && $session['ip_address'] !== $this->CI->input->ip_address()) { $this->sess_destroy(); return FALSE; } // Does the User Agent Match? - if ($this->sess_match_useragent == TRUE && - trim($session['user_agent']) != trim(substr($this->CI->input->user_agent(), 0, 50))) + if ($this->sess_match_useragent === TRUE && + trim($session['user_agent']) !== trim(substr($this->CI->input->user_agent(), 0, 120))) { $this->sess_destroy(); return FALSE; @@ -300,20 +430,20 @@ class CI_Session_cookie extends CI_Session_driver { { $this->CI->db->where('session_id', $session['session_id']); - if ($this->sess_match_ip == TRUE) + if ($this->sess_match_ip === TRUE) { $this->CI->db->where('ip_address', $session['ip_address']); } - if ($this->sess_match_useragent == TRUE) + if ($this->sess_match_useragent === TRUE) { $this->CI->db->where('user_agent', $session['user_agent']); } - $query = $this->CI->db->get($this->sess_table_name); + $query = $this->CI->db->limit(1)->get($this->sess_table_name); // No result? Kill it! - if ($query->num_rows() == 0) + if ($query->num_rows() === 0) { $this->sess_destroy(); return FALSE; @@ -321,7 +451,7 @@ class CI_Session_cookie extends CI_Session_driver { // Is there custom data? If so, add it to the main session array $row = $query->row(); - if (isset($row->user_data) && $row->user_data != '') + if ( ! empty($row->user_data)) { $custom_data = $this->_unserialize($row->user_data); @@ -351,24 +481,27 @@ class CI_Session_cookie extends CI_Session_driver { protected function _sess_create() { $sessid = ''; - while (strlen($sessid) < 32) + do { $sessid .= mt_rand(0, mt_getrandmax()); } + while (strlen($sessid) < 32); // To make the session ID even more secure we'll combine it with the user's IP $sessid .= $this->CI->input->ip_address(); - $this->set_userdata('session_id', md5(uniqid($sessid, TRUE))); - $this->set_userdata('ip_address', $this->CI->input->ip_address()); - $this->set_userdata('user_agent', substr($this->CI->input->user_agent(), 0, 50)); - $this->set_userdata('last_activity',$this->now()); - + $this->userdata = array( + 'session_id' => md5(uniqid($sessid, TRUE)), + 'ip_address' => $this->CI->input->ip_address(), + 'user_agent' => substr($this->CI->input->user_agent(), 0, 120), + 'last_activity' => $this->now, + 'user_data' => '' + ); // Save the data to the DB if needed if ($this->sess_use_database === TRUE) { - $this->CI->db->query($this->CI->db->insert_string($this->sess_table_name, $this->all_userdata())); + $this->CI->db->query($this->CI->db->insert_string($this->sess_table_name, $this->userdata)); } // Write the cookie @@ -382,36 +515,59 @@ class CI_Session_cookie extends CI_Session_driver { * @param boolean Force update flag (default: false) * @return void */ - protected function _sess_update($force = false) + protected function _sess_update($force = FALSE) { // We only update the session every five minutes by default (unless forced) - if (!$force && ($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now()) + if (!$force && ($this->userdata['last_activity'] + $this->sess_time_to_update) >= $this->now) { return; } + // _set_cookie() will handle this for us if we aren't using database sessions + // by pushing all userdata to the cookie. + $cookie_data = NULL; + + /* Changing the session ID during an AJAX call causes problems, + * so we'll only update our last_activity + */ + if ($this->CI->input->is_ajax_request()) + { + $this->userdata['last_activity'] = $this->now; + + // Update the session ID and last_activity field in the DB if needed + if ($this->sess_use_database === TRUE) + { + // set cookie explicitly to only have our session data + $cookie_data = array(); + foreach (array('session_id','ip_address','user_agent','last_activity') as $val) + { + $cookie_data[$val] = $this->userdata[$val]; + } + + $this->CI->db->query($this->CI->db->update_string($this->sess_table_name, + array('last_activity' => $this->userdata['last_activity']), + array('session_id' => $this->userdata['session_id']))); + } + + return $this->_set_cookie($cookie_data); + } + // Save the old session id so we know which record to // update in the database if we need it $old_sessid = $this->userdata['session_id']; $new_sessid = ''; - while (strlen($new_sessid) < 32) + do { $new_sessid .= mt_rand(0, mt_getrandmax()); } + while (strlen($new_sessid) < 32); // To make the session ID even more secure we'll combine it with the user's IP $new_sessid .= $this->CI->input->ip_address(); - // Turn it into a hash - $new_sessid = md5(uniqid($new_sessid, TRUE)); - - // Update the session data in the session data array - $this->set_userdata('session_id', $new_sessid); - $this->set_userdata('last_activity', $this->now()); - - // _set_cookie() will handle this for us if we aren't using database sessions - // by pushing all userdata to the cookie. - $cookie_data = NULL; + // Turn it into a hash and update the session data array + $this->userdata['session_id'] = $new_sessid = md5(uniqid($new_sessid, TRUE)); + $this->userdata['last_activity'] = $this->now; // Update the session ID and last_activity field in the DB if needed if ($this->sess_use_database === TRUE) @@ -424,8 +580,7 @@ class CI_Session_cookie extends CI_Session_driver { } $this->CI->db->query($this->CI->db->update_string($this->sess_table_name, - array('last_activity' => $this->now(), 'session_id' => $new_sessid), - array('session_id' => $old_sessid))); + array('last_activity' => $this->now, 'session_id' => $new_sessid), array('session_id' => $old_sessid))); } // Write the cookie @@ -436,22 +591,19 @@ class CI_Session_cookie extends CI_Session_driver { * Get the "now" time * * @access protected - * @return int + * @return int Time */ protected function _get_time() { - if (strtolower($this->time_reference) == 'gmt') + if ($this->time_reference === 'local' || $this->time_reference === date_default_timezone_get()) { - $now = time(); - $time = mktime(gmdate('H', $now), gmdate('i', $now), gmdate('s', $now), gmdate('m', $now), - gmdate('d', $now), gmdate('Y', $now)); - } - else - { - $time = time(); + return time(); } - return $time; + $datetime = new DateTime('now', new DateTimeZone($this->time_reference)); + sscanf($datetime->format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second); + + return mktime($hour, $minute, $second, $month, $day, $year); } /** @@ -465,13 +617,13 @@ class CI_Session_cookie extends CI_Session_driver { { if (is_null($cookie_data)) { - $cookie_data = $this->all_userdata(); + $cookie_data = $this->userdata; } // Serialize the userdata for the cookie $cookie_data = $this->_serialize($cookie_data); - if ($this->sess_encrypt_cookie == TRUE) + if ($this->sess_encrypt_cookie === TRUE) { $cookie_data = $this->CI->encrypt->encode($cookie_data); } @@ -485,7 +637,7 @@ class CI_Session_cookie extends CI_Session_driver { // Set the cookie setcookie($this->sess_cookie_name, $cookie_data, $expire, $this->cookie_path, $this->cookie_domain, - $this->cookie_secure); + $this->cookie_secure, $this->cookie_httponly); } /** @@ -496,59 +648,78 @@ class CI_Session_cookie extends CI_Session_driver { * * @access protected * @param mixed Data to serialize - * @return string + * @return string Serialized data */ protected function _serialize($data) { if (is_array($data)) { - foreach ($data as $key => $val) - { - if (is_string($val)) - { - $data[$key] = str_replace('\\', '{{slash}}', $val); - } - } + array_walk_recursive($data, array(&$this, '_escape_slashes')); } - else + elseif (is_string($data)) { - if (is_string($data)) - { - $data = str_replace('\\', '{{slash}}', $data); - } + $data = str_replace('\\', '{{slash}}', $data); } - return serialize($data); } /** + * Escape slashes + * + * This function converts any slashes found into a temporary marker + * + * @access protected + * @param string Value + * @param string Key + * @return void + */ + protected function _escape_slashes(&$val, $key) + { + if (is_string($val)) + { + $val = str_replace('\\', '{{slash}}', $val); + } + } + + /** * Unserialize * * This function unserializes a data string, then converts any * temporary slash markers back to actual slashes * * @access protected - * @param string Data to unserialize - * @return mixed + * @param mixed Data to unserialize + * @return mixed Unserialized data */ protected function _unserialize($data) { - $data = @unserialize(strip_slashes($data)); + $data = @unserialize(strip_slashes(trim($data))); if (is_array($data)) { - foreach ($data as $key => $val) - { - if (is_string($val)) - { - $data[$key] = str_replace('{{slash}}', '\\', $val); - } - } - + array_walk_recursive($data, array(&$this, '_unescape_slashes')); return $data; } - return (is_string($data)) ? str_replace('{{slash}}', '\\', $data) : $data; + return is_string($data) ? str_replace('{{slash}}', '\\', $data) : $data; + } + + /** + * Unescape slashes + * + * This function converts any slash markers back into actual slashes + * + * @access protected + * @param string Value + * @param string Key + * @return void + */ + protected function _unescape_slashes(&$val, $key) + { + if (is_string($val)) + { + $val= str_replace('{{slash}}', '\\', $val); + } } /** @@ -562,15 +733,18 @@ class CI_Session_cookie extends CI_Session_driver { */ protected function _sess_gc() { - if ($this->sess_use_database != TRUE) + if ($this->sess_use_database !== TRUE) { return; } + $probability = ini_get('session.gc_probability'); + $divisor = ini_get('session.gc_divisor'); + srand(time()); - if ((rand() % 100) < self::gc_probability) + if ((mt_rand(0, $divisor) / $divisor) < $probability) { - $expire = $this->now() - $this->sess_expiration; + $expire = $this->now - $this->sess_expiration; $this->CI->db->where('last_activity < '.$expire); $this->CI->db->delete($this->sess_table_name); @@ -578,9 +752,8 @@ class CI_Session_cookie extends CI_Session_driver { log_message('debug', 'Session garbage collection performed.'); } } + } -// END CI_Session_cookie Class /* End of file Session_cookie.php */ /* Location: ./system/libraries/Session/drivers/Session_cookie.php */ -?> |