<?php
/***************************************************************************
* sessions.php
* -------------------
* begin : Saturday, Feb 13, 2001
* copyright : (C) 2001 The phpBB Group
* email : support@phpbb.com
*
* $Id$
*
*
***************************************************************************/
/***************************************************************************
*
* 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.
*
***************************************************************************/
//
// session_begin()
//
// 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)
{
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'])) : '';
$sessionmethod = SESSION_METHOD_COOKIE;
}
else
{
$sessiondata = '';
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
$sessionmethod = SESSION_METHOD_GET;
}
$last_visit = 0;
$current_time = time();
$expiry_time = $current_time - $board_config['session_length'];
//
// Try and pull the last time stored
// in a cookie, if it exists
//
$sql = "SELECT *
FROM " . USERS_TABLE . "
WHERE user_id = $user_id";
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Could not obtain lastvisit data from user table', '', __LINE__, __FILE__, $sql);
}
$userdata = $db->sql_fetchrow($result);
if ( $user_id != ANONYMOUS )
{
$auto_login_key = $userdata['user_password'];
if ( $auto_create )
{
if ( isset($sessiondata['autologinid']) && $userdata['user_active'] )
{
// We have to login automagically
if( $sessiondata['autologinid'] == $auto_login_key )
{
// autologinid matches password
$login = 1;
$enable_autologin = 1;
$last_visit = ( $userdata['user_session_time'] > 0 ) ? $userdata['user_session_time'] : $current_time;
}
else
{
// No match; don't login, set as anonymous user
$login = 0;
$enable_autologin = 0;
$user_id = ANONYMOUS;
}
}
else
{
// Autologin is not set. Don't login, set as anonymous user
$login = 0;
$enable_autologin = 0;
$user_id = ANONYMOUS;
}
}
else
{
$last_visit = ( $userdata['user_session_time'] > 0 ) ? $userdata['user_session_time'] : $current_time;
$login = 1;
}
}
else
{
$login = 0;
$enable_autologin = 0;
}
//
// 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("\'", "''", $row['user_email']) . "'
OR ban_email LIKE '" . substr(str_replace("\'", "''", $row['user_email']), strpos(str_replace("\'", "''", $row['user_email']), "@")) . "'";
}
if ( !($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
WHERE session_id = '" . $session_id . "'
AND session_ip = '$user_ip'";
if ( !($result = $db->sql_query($sql)) || !$db->sql_affectedrows() )
{
$session_id = md5(uniqid($user_ip));
$sql = "INSERT INTO " . SESSIONS_TABLE . "
(session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in)
VALUES ('$session_id', $user_id, $current_time, $current_time, '$user_ip', $page_id, $login)";
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Error creating new session : session_begin', '', __LINE__, __FILE__, $sql);
}
}
if ( $user_id != ANONYMOUS )
{
$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 : session_begin', '', __LINE__, __FILE__, $sql);
}
$userdata['user_lastvisit'] = $last_visit;
$sessiondata['autologinid'] = ( $enable_autologin && $sessionmethod == SESSION_METHOD_COOKIE ) ? $auto_login_key : '';
$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'] = $current_time;
setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure);
setcookie($cookiename . '_sid', $session_id, 0, $cookiepath, $cookiedomain, $cookiesecure);
// header('Set-cookie: ' . $cookiename . '_data=' . urlencode(serialize($sessiondata)) . '; expires=' . gmdate("l, d-M-Y H:i:s", $current_time + 31536000) . ' GMT; domain=' . $cookiedomain . '; path=' . $cookiepath . $cookiesecure);
// header('Set-cookie: ' . $cookiename . '_sid=' . $session_id . '; domain=' . $cookiedomain . '; path=' . $cookiepath . $cookiesecure);
$SID = ( $sessionmethod == SESSION_METHOD_GET ) ? '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'];
$cookiesecure = ( $board_config['cookie_secure'] ) ? '; 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'])) : '';
$session_id = isset( $HTTP_COOKIE_VARS[$cookiename . '_sid'] ) ? $HTTP_COOKIE_VARS[$cookiename . '_sid'] : '';
$sessionmethod = SESSION_METHOD_COOKIE;
}
else
{
$session_data = '';
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
$sessionmethod = SESSION_METHOD_GET;
}
//
// Does a session exist?
//
if ( !empty($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
AND s.session_ip = '$user_ip'";
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch : session_pagestart', '', __LINE__, __FILE__, $sql);
}
$userdata = $db->sql_fetchrow($result);
//
// Did the session exist in the DB?
//
if ( isset($userdata['user_id']) )
{
$SID = ( $sessionmethod == SESSION_METHOD_GET ) ? 'sid=' . $session_id : '';
//
// Only update session DB a minute or so after last update
//
$last_update = ( $userdata['user_id'] == ANONYMOUS ) ? $userdata['session_time'] : $userdata['user_session_time'];
if ( $current_time - $last_update > 60 )
{ // || $userdata['user_session_page'] != $thispage_id
$sql = ( $userdata['user_id'] == ANONYMOUS ) ? "UPDATE " . SESSIONS_TABLE . " SET session_time = $current_time, session_page = $thispage_id WHERE session_id = '" . $userdata['session_id'] . "' AND session_ip = '$user_ip'" : "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 : session_pagestart', '', __LINE__, __FILE__, $sql);
}
//
// Delete expired sessions
//
$expiry_time = $current_time - $board_config['session_length'];
$sql = "DELETE FROM " . SESSIONS_TABLE . "
WHERE session_time < $expiry_time
AND session_id <> '$session_id'";
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Error clearing sessions table : session_pagestart', '', __LINE__, __FILE__, $sql);
}
setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure);
setcookie($cookiename . '_sid', $session_id, 0, $cookiepath, $cookiedomain, $cookiesecure);
// header('Set-cookie: ' . $cookiename . '_data=' . urlencode(serialize($sessiondata)) . '; expires=' . gmdate("l, d-M-Y H:i:s", $current_time + 31536000) . ' GMT; domain=' . $cookiedomain . '; path=' . $cookiepath . $cookiesecure);
// header('Set-cookie: ' . $cookiename . '_sid=' . $session_id . '; domain=' . $cookiedomain . '; path=' . $cookiepath . $cookiesecure);
}
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']) ) ? $sessiondata['userid'] : ANONYMOUS;
if ( !($userdata = session_begin($user_id, $user_ip, $thispage_id, TRUE)) )
{
message_die(CRITICAL_ERROR, 'Error creating user session : session_pagestart', '', __LINE__, __FILE__, $sql);
}
return $userdata;
}
//
// session_end closes out a session
// deleting the corresponding entry
// in the sessions table
//
function session_end($session_id, $user_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'];
// $cookiesecure = ( $board_config['cookie_secure'] ) ? '; secure' : '';
//
// Pull cookiedata or grab the URI propagated sid
//
if ( isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) )
{
$session_id = isset( $HTTP_COOKIE_VARS[$cookiename . '_sid'] ) ? $HTTP_COOKIE_VARS[$cookiename . '_sid'] : '';
$sessionmethod = SESSION_METHOD_COOKIE;
}
else
{
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
$sessionmethod = SESSION_METHOD_GET;
}
//
// Delete existing session
//
$sql = "DELETE FROM " . SESSIONS_TABLE . "
WHERE session_id = '$session_id'
AND session_user_id = $user_id";
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Error removing user session : session_end', '', __LINE__, __FILE__, $sql);
}
setcookie($cookiename . '_data', '', $current_time - 31536000, $cookiepath, $cookiedomain, $cookiesecure);
setcookie($cookiename . '_sid', '', $current_time - 31536000, $cookiepath, $cookiedomain, $cookiesecure);
// header('Set-cookie: ' . $cookiename . '_data=0; expires=' . gmdate("l, d-M-Y H:i:s", 0) . ' GMT; domain=' . $cookiedomain . '; path=' . $cookiepath. $cookiesecure);
// header('Set-cookie: ' . $cookiename . '_sid=0; expires=' . gmdate("l, d-M-Y H:i:s", 0) . ' GMT; domain=' . $cookiedomain . '; path=' . $cookiepath . $cookiesecure);
$SID = ( $sessionmethod == SESSION_METHOD_GET ) ? 'sid=' . $session_id : '';
return TRUE;
}
//
// 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) && !eregi('sid=', $url) )
{
$url .= ( ( strpos($url, '?') != false ) ? ( ( $non_html_amp ) ? '&' : '&' ) : '?' ) . $SID;
}
return($url);
}
?>