0,0 → 1,578 |
<?php |
/*************************************************************************** |
* sessions.php |
* ------------------- |
* begin : Saturday, Feb 13, 2001 |
* copyright : (C) 2001 The phpBB Group |
* email : support@phpbb.com |
* |
* $Id: sessions.php,v 1.58.2.25 2006/05/18 19:23:07 grahamje Exp $ |
* |
* |
***************************************************************************/ |
|
/*************************************************************************** |
* |
* This program is free software; you can redistribute it and/or modify |
* it under the terms of the GNU General Public License as published by |
* the Free Software Foundation; either version 2 of the License, or |
* (at your option) any later version. |
* |
***************************************************************************/ |
|
// |
// Adds/updates a new session to the database for the given userid. |
// Returns the new session ID on success. |
// |
function session_begin($user_id, $user_ip, $page_id, $auto_create = 0, $enable_autologin = 0, $admin = 0) |
{ |
global $db, $board_config; |
global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID; |
|
$cookiename = $board_config['cookie_name']; |
$cookiepath = $board_config['cookie_path']; |
$cookiedomain = $board_config['cookie_domain']; |
$cookiesecure = $board_config['cookie_secure']; |
|
if ( isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) || isset($HTTP_COOKIE_VARS[$cookiename . '_data']) ) |
{ |
$session_id = isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) ? $HTTP_COOKIE_VARS[$cookiename . '_sid'] : ''; |
$sessiondata = isset($HTTP_COOKIE_VARS[$cookiename . '_data']) ? unserialize(stripslashes($HTTP_COOKIE_VARS[$cookiename . '_data'])) : array(); |
$sessionmethod = SESSION_METHOD_COOKIE; |
} |
else |
{ |
$sessiondata = array(); |
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : ''; |
$sessionmethod = SESSION_METHOD_GET; |
} |
|
// |
if (!preg_match('/^[A-Za-z0-9]*$/', $session_id)) |
{ |
$session_id = ''; |
} |
|
$page_id = (int) $page_id; |
|
$last_visit = 0; |
$current_time = time(); |
|
// |
// Are auto-logins allowed? |
// If allow_autologin is not set or is true then they are |
// (same behaviour as old 2.0.x session code) |
// |
if (isset($board_config['allow_autologin']) && !$board_config['allow_autologin']) |
{ |
$enable_autologin = $sessiondata['autologinid'] = false; |
} |
|
// |
// First off attempt to join with the autologin value if we have one |
// If not, just use the user_id value |
// |
$userdata = array(); |
|
if ($user_id != ANONYMOUS) |
{ |
if (isset($sessiondata['autologinid']) && (string) $sessiondata['autologinid'] != '' && $user_id) |
{ |
$sql = 'SELECT u.* |
FROM ' . USERS_TABLE . ' u, ' . SESSIONS_KEYS_TABLE . ' k |
WHERE u.user_id = ' . (int) $user_id . " |
AND u.user_active = 1 |
AND k.user_id = u.user_id |
AND k.key_id = '" . md5($sessiondata['autologinid']) . "'"; |
if (!($result = $db->sql_query($sql))) |
{ |
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql); |
} |
|
$userdata = $db->sql_fetchrow($result); |
$db->sql_freeresult($result); |
|
$enable_autologin = $login = 1; |
} |
else if (!$auto_create) |
{ |
$sessiondata['autologinid'] = ''; |
$sessiondata['userid'] = $user_id; |
|
$sql = 'SELECT * |
FROM ' . USERS_TABLE . ' |
WHERE user_id = ' . (int) $user_id . ' |
AND user_active = 1'; |
if (!($result = $db->sql_query($sql))) |
{ |
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql); |
} |
|
$userdata = $db->sql_fetchrow($result); |
$db->sql_freeresult($result); |
|
$login = 1; |
} |
} |
|
// |
// At this point either $userdata should be populated or |
// one of the below is true |
// * Key didn't match one in the DB |
// * User does not exist |
// * User is inactive |
// |
if (!sizeof($userdata) || !is_array($userdata) || !$userdata) |
{ |
$sessiondata['autologinid'] = ''; |
$sessiondata['userid'] = $user_id = ANONYMOUS; |
$enable_autologin = $login = 0; |
|
$sql = 'SELECT * |
FROM ' . USERS_TABLE . ' |
WHERE user_id = ' . (int) $user_id; |
if (!($result = $db->sql_query($sql))) |
{ |
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql); |
} |
|
$userdata = $db->sql_fetchrow($result); |
$db->sql_freeresult($result); |
} |
|
|
// |
// Initial ban check against user id, IP and email address |
// |
preg_match('/(..)(..)(..)(..)/', $user_ip, $user_ip_parts); |
|
$sql = "SELECT ban_ip, ban_userid, ban_email |
FROM " . BANLIST_TABLE . " |
WHERE ban_ip IN ('" . $user_ip_parts[1] . $user_ip_parts[2] . $user_ip_parts[3] . $user_ip_parts[4] . "', '" . $user_ip_parts[1] . $user_ip_parts[2] . $user_ip_parts[3] . "ff', '" . $user_ip_parts[1] . $user_ip_parts[2] . "ffff', '" . $user_ip_parts[1] . "ffffff') |
OR ban_userid = $user_id"; |
if ( $user_id != ANONYMOUS ) |
{ |
$sql .= " OR ban_email LIKE '" . str_replace("\'", "''", $userdata['user_email']) . "' |
OR ban_email LIKE '" . substr(str_replace("\'", "''", $userdata['user_email']), strpos(str_replace("\'", "''", $userdata['user_email']), "@")) . "'"; |
} |
if ( !($result = $db->sql_query($sql)) ) |
{ |
message_die(CRITICAL_ERROR, 'Could not obtain ban information', '', __LINE__, __FILE__, $sql); |
} |
|
if ( $ban_info = $db->sql_fetchrow($result) ) |
{ |
if ( $ban_info['ban_ip'] || $ban_info['ban_userid'] || $ban_info['ban_email'] ) |
{ |
message_die(CRITICAL_MESSAGE, 'You_been_banned'); |
} |
} |
|
// |
// Create or update the session |
// |
$sql = "UPDATE " . SESSIONS_TABLE . " |
SET session_user_id = $user_id, session_start = $current_time, session_time = $current_time, session_page = $page_id, session_logged_in = $login, session_admin = $admin |
WHERE session_id = '" . $session_id . "' |
AND session_ip = '$user_ip'"; |
if ( !$db->sql_query($sql) || !$db->sql_affectedrows() ) |
{ |
$session_id = md5(dss_rand()); |
|
$sql = "INSERT INTO " . SESSIONS_TABLE . " |
(session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) |
VALUES ('$session_id', $user_id, $current_time, $current_time, '$user_ip', $page_id, $login, $admin)"; |
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error creating new session', '', __LINE__, __FILE__, $sql); |
} |
} |
|
if ( $user_id != ANONYMOUS ) |
{ |
$last_visit = ( $userdata['user_session_time'] > 0 ) ? $userdata['user_session_time'] : $current_time; |
|
if (!$admin) |
{ |
$sql = "UPDATE " . USERS_TABLE . " |
SET user_session_time = $current_time, user_session_page = $page_id, user_lastvisit = $last_visit |
WHERE user_id = $user_id"; |
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error updating last visit time', '', __LINE__, __FILE__, $sql); |
} |
} |
|
$userdata['user_lastvisit'] = $last_visit; |
|
// |
// Regenerate the auto-login key |
// |
if ($enable_autologin) |
{ |
$auto_login_key = dss_rand() . dss_rand(); |
|
if (isset($sessiondata['autologinid']) && (string) $sessiondata['autologinid'] != '') |
{ |
$sql = 'UPDATE ' . SESSIONS_KEYS_TABLE . " |
SET last_ip = '$user_ip', key_id = '" . md5($auto_login_key) . "', last_login = $current_time |
WHERE key_id = '" . md5($sessiondata['autologinid']) . "'"; |
} |
else |
{ |
$sql = 'INSERT INTO ' . SESSIONS_KEYS_TABLE . "(key_id, user_id, last_ip, last_login) |
VALUES ('" . md5($auto_login_key) . "', $user_id, '$user_ip', $current_time)"; |
} |
|
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error updating session key', '', __LINE__, __FILE__, $sql); |
} |
|
$sessiondata['autologinid'] = $auto_login_key; |
unset($auto_login_key); |
} |
else |
{ |
$sessiondata['autologinid'] = ''; |
} |
|
// $sessiondata['autologinid'] = (!$admin) ? (( $enable_autologin && $sessionmethod == SESSION_METHOD_COOKIE ) ? $auto_login_key : '') : $sessiondata['autologinid']; |
$sessiondata['userid'] = $user_id; |
} |
|
$userdata['session_id'] = $session_id; |
$userdata['session_ip'] = $user_ip; |
$userdata['session_user_id'] = $user_id; |
$userdata['session_logged_in'] = $login; |
$userdata['session_page'] = $page_id; |
$userdata['session_start'] = $current_time; |
$userdata['session_time'] = $current_time; |
$userdata['session_admin'] = $admin; |
$userdata['session_key'] = $sessiondata['autologinid']; |
|
setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure); |
setcookie($cookiename . '_sid', $session_id, 0, $cookiepath, $cookiedomain, $cookiesecure); |
|
$SID = 'sid=' . $session_id; |
|
return $userdata; |
} |
|
// |
// Checks for a given user session, tidies session table and updates user |
// sessions at each page refresh |
// |
function session_pagestart($user_ip, $thispage_id) |
{ |
global $db, $lang, $board_config; |
global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID; |
|
$cookiename = $board_config['cookie_name']; |
$cookiepath = $board_config['cookie_path']; |
$cookiedomain = $board_config['cookie_domain']; |
$cookiesecure = $board_config['cookie_secure']; |
|
$current_time = time(); |
unset($userdata); |
|
if ( isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) || isset($HTTP_COOKIE_VARS[$cookiename . '_data']) ) |
{ |
$sessiondata = isset( $HTTP_COOKIE_VARS[$cookiename . '_data'] ) ? unserialize(stripslashes($HTTP_COOKIE_VARS[$cookiename . '_data'])) : array(); |
$session_id = isset( $HTTP_COOKIE_VARS[$cookiename . '_sid'] ) ? $HTTP_COOKIE_VARS[$cookiename . '_sid'] : ''; |
$sessionmethod = SESSION_METHOD_COOKIE; |
} |
else |
{ |
$sessiondata = array(); |
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : ''; |
$sessionmethod = SESSION_METHOD_GET; |
} |
|
// |
if (!preg_match('/^[A-Za-z0-9]*$/', $session_id)) |
{ |
$session_id = ''; |
} |
|
$thispage_id = (int) $thispage_id; |
|
// |
// Does a session exist? |
// |
if ( !empty($session_id) ) |
{ |
// |
// session_id exists so go ahead and attempt to grab all |
// data in preparation |
// |
$sql = "SELECT u.*, s.* |
FROM " . SESSIONS_TABLE . " s, " . USERS_TABLE . " u |
WHERE s.session_id = '$session_id' |
AND u.user_id = s.session_user_id"; |
if ( !($result = $db->sql_query($sql)) ) |
{ |
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql); |
} |
|
$userdata = $db->sql_fetchrow($result); |
|
// |
// Did the session exist in the DB? |
// |
if ( isset($userdata['user_id']) ) |
{ |
// |
// Do not check IP assuming equivalence, if IPv4 we'll check only first 24 |
// bits ... I've been told (by vHiker) this should alleviate problems with |
// load balanced et al proxies while retaining some reliance on IP security. |
// |
$ip_check_s = substr($userdata['session_ip'], 0, 6); |
$ip_check_u = substr($user_ip, 0, 6); |
|
if ($ip_check_s == $ip_check_u) |
{ |
$SID = ($sessionmethod == SESSION_METHOD_GET || defined('IN_ADMIN')) ? 'sid=' . $session_id : ''; |
|
// |
// Only update session DB a minute or so after last update |
// |
if ( $current_time - $userdata['session_time'] > 60 ) |
{ |
// A little trick to reset session_admin on session re-usage |
$update_admin = (!defined('IN_ADMIN') && $current_time - $userdata['session_time'] > ($board_config['session_length']+60)) ? ', session_admin = 0' : ''; |
|
$sql = "UPDATE " . SESSIONS_TABLE . " |
SET session_time = $current_time, session_page = $thispage_id$update_admin |
WHERE session_id = '" . $userdata['session_id'] . "'"; |
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error updating sessions table', '', __LINE__, __FILE__, $sql); |
} |
|
if ( $userdata['user_id'] != ANONYMOUS ) |
{ |
$sql = "UPDATE " . USERS_TABLE . " |
SET user_session_time = $current_time, user_session_page = $thispage_id |
WHERE user_id = " . $userdata['user_id']; |
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error updating sessions table', '', __LINE__, __FILE__, $sql); |
} |
} |
|
session_clean($userdata['session_id']); |
|
setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure); |
setcookie($cookiename . '_sid', $session_id, 0, $cookiepath, $cookiedomain, $cookiesecure); |
} |
|
// Add the session_key to the userdata array if it is set |
if ( isset($sessiondata['autologinid']) && $sessiondata['autologinid'] != '' ) |
{ |
$userdata['session_key'] = $sessiondata['autologinid']; |
} |
|
return $userdata; |
} |
} |
} |
|
// |
// If we reach here then no (valid) session exists. So we'll create a new one, |
// using the cookie user_id if available to pull basic user prefs. |
// |
$user_id = ( isset($sessiondata['userid']) ) ? intval($sessiondata['userid']) : ANONYMOUS; |
|
if ( !($userdata = session_begin($user_id, $user_ip, $thispage_id, TRUE)) ) |
{ |
message_die(CRITICAL_ERROR, 'Error creating user session', '', __LINE__, __FILE__, $sql); |
} |
|
return $userdata; |
|
} |
|
/** |
* Terminates the specified session |
* It will delete the entry in the sessions table for this session, |
* remove the corresponding auto-login key and reset the cookies |
*/ |
function session_end($session_id, $user_id) |
{ |
global $db, $lang, $board_config, $userdata; |
global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID; |
|
$cookiename = $board_config['cookie_name']; |
$cookiepath = $board_config['cookie_path']; |
$cookiedomain = $board_config['cookie_domain']; |
$cookiesecure = $board_config['cookie_secure']; |
|
$current_time = time(); |
|
if (!preg_match('/^[A-Za-z0-9]*$/', $session_id)) |
{ |
return; |
} |
|
// |
// Delete existing session |
// |
$sql = 'DELETE FROM ' . SESSIONS_TABLE . " |
WHERE session_id = '$session_id' |
AND session_user_id = $user_id"; |
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error removing user session', '', __LINE__, __FILE__, $sql); |
} |
|
// |
// Remove this auto-login entry (if applicable) |
// |
if ( isset($userdata['session_key']) && $userdata['session_key'] != '' ) |
{ |
$autologin_key = md5($userdata['session_key']); |
$sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . ' |
WHERE user_id = ' . (int) $user_id . " |
AND key_id = '$autologin_key'"; |
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error removing auto-login key', '', __LINE__, __FILE__, $sql); |
} |
} |
|
// |
// We expect that message_die will be called after this function, |
// but just in case it isn't, reset $userdata to the details for a guest |
// |
$sql = 'SELECT * |
FROM ' . USERS_TABLE . ' |
WHERE user_id = ' . ANONYMOUS; |
if ( !($result = $db->sql_query($sql)) ) |
{ |
message_die(CRITICAL_ERROR, 'Error obtaining user details', '', __LINE__, __FILE__, $sql); |
} |
if ( !($userdata = $db->sql_fetchrow($result)) ) |
{ |
message_die(CRITICAL_ERROR, 'Error obtaining user details', '', __LINE__, __FILE__, $sql); |
} |
$db->sql_freeresult($result); |
|
|
setcookie($cookiename . '_data', '', $current_time - 31536000, $cookiepath, $cookiedomain, $cookiesecure); |
setcookie($cookiename . '_sid', '', $current_time - 31536000, $cookiepath, $cookiedomain, $cookiesecure); |
|
return true; |
} |
|
/** |
* Removes expired sessions and auto-login keys from the database |
*/ |
function session_clean($session_id) |
{ |
global $board_config, $db; |
|
// |
// Delete expired sessions |
// |
$sql = 'DELETE FROM ' . SESSIONS_TABLE . ' |
WHERE session_time < ' . (time() - (int) $board_config['session_length']) . " |
AND session_id <> '$session_id'"; |
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error clearing sessions table', '', __LINE__, __FILE__, $sql); |
} |
|
// |
// Delete expired auto-login keys |
// If max_autologin_time is not set then keys will never be deleted |
// (same behaviour as old 2.0.x session code) |
// |
if (!empty($board_config['max_autologin_time']) && $board_config['max_autologin_time'] > 0) |
{ |
$sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . ' |
WHERE last_login < ' . (time() - (86400 * (int) $board_config['max_autologin_time'])); |
$db->sql_query($sql); |
} |
|
return true; |
} |
|
/** |
* Reset all login keys for the specified user |
* Called on password changes |
*/ |
function session_reset_keys($user_id, $user_ip) |
{ |
global $db, $userdata, $board_config; |
|
$key_sql = ($user_id == $userdata['user_id'] && !empty($userdata['session_key'])) ? "AND key_id != '" . md5($userdata['session_key']) . "'" : ''; |
|
$sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . ' |
WHERE user_id = ' . (int) $user_id . " |
$key_sql"; |
|
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error removing auto-login keys', '', __LINE__, __FILE__, $sql); |
} |
|
$where_sql = 'session_user_id = ' . (int) $user_id; |
$where_sql .= ($user_id == $userdata['user_id']) ? " AND session_id <> '" . $userdata['session_id'] . "'" : ''; |
$sql = 'DELETE FROM ' . SESSIONS_TABLE . " |
WHERE $where_sql"; |
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error removing user session(s)', '', __LINE__, __FILE__, $sql); |
} |
|
if ( !empty($key_sql) ) |
{ |
$auto_login_key = dss_rand() . dss_rand(); |
|
$current_time = time(); |
|
$sql = 'UPDATE ' . SESSIONS_KEYS_TABLE . " |
SET last_ip = '$user_ip', key_id = '" . md5($auto_login_key) . "', last_login = $current_time |
WHERE key_id = '" . md5($userdata['session_key']) . "'"; |
|
if ( !$db->sql_query($sql) ) |
{ |
message_die(CRITICAL_ERROR, 'Error updating session key', '', __LINE__, __FILE__, $sql); |
} |
|
// And now rebuild the cookie |
$sessiondata['userid'] = $user_id; |
$sessiondata['autologinid'] = $auto_login_key; |
$cookiename = $board_config['cookie_name']; |
$cookiepath = $board_config['cookie_path']; |
$cookiedomain = $board_config['cookie_domain']; |
$cookiesecure = $board_config['cookie_secure']; |
|
setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure); |
|
$userdata['session_key'] = $auto_login_key; |
unset($sessiondata); |
unset($auto_login_key); |
} |
} |
|
// |
// Append $SID to a url. Borrowed from phplib and modified. This is an |
// extra routine utilised by the session code above and acts as a wrapper |
// around every single URL and form action. If you replace the session |
// code you must include this routine, even if it's empty. |
// |
function append_sid($url, $non_html_amp = false) |
{ |
global $SID; |
|
if ( !empty($SID) && !preg_match('#sid=#', $url) ) |
{ |
$url .= ( ( strpos($url, '?') !== false ) ? ( ( $non_html_amp ) ? '&' : '&' ) : '?' ) . $SID; |
} |
|
return $url; |
} |
|
?> |