<?php
/***************************************************************************
* session.php
* -------------------
* begin : Saturday, Feb 13, 2001
* copyright : (C) 2002 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.
*
***************************************************************************/
class session {
var $session_id = '';
var $load;
function start($update = true)
{
global $SID, $db, $board_config, $user_ip;
global $HTTP_SERVER_VARS, $HTTP_ENV_VARS, $HTTP_COOKIE_VARS, $HTTP_GET_VARS;
$user_browser = ( !empty($HTTP_SERVER_VARS['HTTP_USER_AGENT']) ) ? $HTTP_SERVER_VARS['HTTP_USER_AGENT'] : $HTTP_ENV_VARS['HTTP_USER_AGENT'];
$user_page = ( !empty($HTTP_SERVER_VARS['PHP_SELF']) ) ? $HTTP_SERVER_VARS['PHP_SELF'] : $HTTP_ENV_VARS['PHP_SELF'];
$user_page .= '&' . ( ( !empty($HTTP_SERVER_VARS['QUERY_STRING']) ) ? $HTTP_SERVER_VARS['QUERY_STRING'] : $HTTP_ENV_VARS['QUERY_STRING'] );
$current_time = time();
if ( isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_sid']) || isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_data']) )
{
$sessiondata = ( isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_data']) ) ? unserialize(stripslashes($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_data'])) : '';
$this->session_id = ( isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_sid']) ) ? $HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_sid'] : '';
$SID = '?sid=';
}
else
{
$sessiondata = '';
$this->session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
$SID = '?sid=' . $this->session_id;
}
//
// Load limit check (if applicable)
//
if ( !empty($board_config['limit_load']) && file_exists('/proc/loadavg') )
{
if ( $load = @file('/proc/loadavg') )
{
list($this->load) = explode(' ', $load[0]);
if ( $this->load > $board_config['limit_load'] )
{
message_die(MESSAGE, 'Board_unavailable');
}
}
}
//
// session_id exists so go ahead and attempt to grab all data in preparation
//
if ( !empty($this->session_id) )
{
$sql = "SELECT u.*, s.*
FROM " . SESSIONS_TABLE . " s, " . USERS_TABLE . " u
WHERE s.session_id = '" . $this->session_id . "'
AND u.user_id = s.session_user_id";
$result = $db->sql_query($sql);
$userdata = $db->sql_fetchrow($result);
$db->sql_freeresult($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 = explode('.', $userdata['session_ip']);
$ip_check_u = explode('.', $user_ip);
if ( $ip_check_s[0].'.'.$ip_check_s[1].'.'.$ip_check_s[2] == $ip_check_u[0].'.'.$ip_check_u[1].'.'.$ip_check_u[2] )
{
//
// Only update session DB a minute or so after last update or if page changes
//
if ( ( $current_time - $userdata['session_time'] > 60 || $userdata['session_page'] != $user_page ) && $update )
{
$sql = "UPDATE " . SESSIONS_TABLE . "
SET session_time = $current_time, session_page = '$user_page'
WHERE session_id = '" . $this->session_id . "'";
$db->sql_query($sql);
//
// Garbage collection ... remove old sessions updating user information
// if necessary. It means (potentially) lots of queries but only infrequently
//
if ( $current_time - $board_config['session_gc'] > $board_config['session_last_gc'] )
{
$this->gc($current_time);
}
}
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.
//
$autologin = ( isset($sessiondata['autologinid']) ) ? $sessiondata['autologinid'] : '';
$user_id = ( isset($sessiondata['userid']) ) ? intval($sessiondata['userid']) : ANONYMOUS;
return $this->create($user_id, $autologin, $user_page, $user_browser);
}
//
// Create a new session
//
function create(&$user_id, &$autologin, &$user_page, &$user_browser)
{
global $SID, $db, $board_config, $user_ip;
$sessiondata = array();
$current_time = time();
//
// Limit sessions in 1 minute period
//
$sql = "SELECT COUNT(*) AS sessions
FROM " . SESSIONS_TABLE . "
WHERE session_time >= " . ( $current_time - 60 );
$result = $db->sql_query($sql);
$row = $db->sql_fetchrow[$result];
$db->sql_freeresult($result);
if ( intval($board_config['active_sessions']) && intval($row['sessions']) > intval($board_config['active_sessions']) )
{
message_die(MESSAGE, 'Board_unavailable');
}
//
// Grab user data
//
$sql = "SELECT *
FROM " . USERS_TABLE . "
WHERE user_id = $user_id";
$result = $db->sql_query($sql);
$userdata = $db->sql_fetchrow($result);
$db->sql_freeresult($result);
//
// Check autologin request, is it valid?
//
if ( $userdata['user_password'] != $autologin || !$userdata['user_active'] || $user_id == ANONYMOUS )
{
$autologin = '';
$userdata['user_id'] = $user_id = ANONYMOUS;
}
$sql = "SELECT ban_ip, ban_userid, ban_email
FROM " . BANLIST_TABLE . "
WHERE ban_end >= $current_time
OR ban_end = 0";
$result = $db->sql_query($sql);
if ( $row = $db->sql_fetchrow($result) )
{
do
{
if ( ( $row['user_id'] == $userdata['user_id'] ||
( $row['ban_ip'] && preg_match('#^' . str_replace('*', '.*?', $row['ban_ip']) . '$#i', $user_ip) ) ||
( $row['ban_email'] && preg_match('#^' . str_replace('*', '.*?', $row['ban_email']) . '$#i', $userdata['user_email']) ) )
&& !$userdata['user_founder'] )
{
message_die(MESSAGE, 'You_been_banned');
}
}
while ( $row = $db->sql_fetchrow($result) );
}
$db->sql_freeresult($result);
//
// Create or update the session
//
$db->sql_return_on_error(true);
$sql = "UPDATE " . SESSIONS_TABLE . "
SET session_user_id = $user_id, session_start = $current_time, session_time = $current_time, session_browser = '$user_browser', session_page = '$user_page'
WHERE session_id = '" . $this->session_id . "'";
if ( !($result = $db->sql_query($sql)) || !$db->sql_affectedrows() )
{
$db->sql_return_on_error(false);
$this->session_id = md5(uniqid($user_ip));
$sql = "INSERT INTO " . SESSIONS_TABLE . "
(session_id, session_user_id, session_start, session_time, session_ip, session_browser, session_page)
VALUES ('" . $this->session_id . "', $user_id, $current_time, $current_time, '$user_ip', '$user_browser', '$user_page')";
$db->sql_query($sql);
}
$db->sql_return_on_error(false);
$userdata['session_id'] = $session_id;
$sessiondata['autologinid'] = ( $autologin && $user_id != ANONYMOUS ) ? $autologin : '';
$sessiondata['userid'] = $user_id;
setcookie($board_config['cookie_name'] . '_data', serialize($sessiondata), $current_time + 31536000, $board_config['cookie_path'], $board_config['cookie_domain'], $board_config['cookie_secure']);
setcookie($board_config['cookie_name'] . '_sid', $this->session_id, 0, $board_config['cookie_path'], $board_config['cookie_domain'], $board_config['cookie_secure']);
$SID = '?sid=' . $this->session_id;
return $userdata;
}
//
// Destroy a session
//
function destroy(&$userdata)
{
global $SID, $db, $board_config;
global $HTTP_COOKIE_VARS, $HTTP_GET_VARS;
$current_time = time();
setcookie($board_config['cookie_name'] . '_data', '', $current_time - 31536000, $board_config['cookie_path'], $board_config['cookie_domain'], $board_config['cookie_secure']);
setcookie($board_config['cookie_name'] . '_sid', '', $current_time - 31536000, $board_config['cookie_path'], $board_config['cookie_domain'], $board_config['cookie_secure']);
//
// Delete existing session, update last visit info first!
//
$sql = "UPDATE " . USERS_TABLE . "
SET user_lastvisit = " . $userdata['session_time'] . ", user_session_page = '" . $userdata['session_page'] . "'
WHERE user_id = " . $userdata['user_id'];
$db->sql_query($sql);
$sql = "DELETE FROM " . SESSIONS_TABLE . "
WHERE session_id = '" . $this->session_id . "'
AND session_user_id = " . $userdata['user_id'];
$db->sql_query($sql);
$SID = '?sid=';
$this->session_id = '';
return true;
}
//
// Garbage collection
//
function gc(&$current_time)
{
global $db, $board_config, $user_ip;
$sql = "SELECT *
FROM " . SESSIONS_TABLE . "
WHERE session_time < " . ( $current_time - $board_config['session_length'] ) . "
LIMIT 10";
$result = $db->sql_query($sql);
$del_session_id = '';
while ( $row = $db->sql_fetchrow($result) )
{
if ( $row['user_id'] != ANONYMOUS )
{
$sql = "UPDATE " . USERS_TABLE . "
SET user_lastvisit = " . $row['session_time'] . ", user_session_page = '" . $row['session_page'] . "'
WHERE user_id = " . $row['session_user_id'];
$db->sql_query($sql);
}
$del_session_id .= ( ( $del_session_id != '' ) ? ', ' : '' ) . '\'' . $row['session_id'] . '\'';
}
if ( $del_session_id != '' )
{
//
// Delete expired sessions
//
$sql = "DELETE FROM " . SESSIONS_TABLE . "
WHERE session_id IN ($del_session_id)";
$db->sql_query($sql);
}
$sql = "UPDATE " . CONFIG_TABLE . "
SET config_value = '$current_time'
WHERE config_name = 'session_last_gc'";
$db->sql_query($sql);
return;
}
//
//
//
function configure($userdata, $lang_set = false)
{
global $db, $template, $lang, $board_config, $theme, $images;
global $phpEx, $phpbb_root_path;
if ( $userdata['user_id'] != ANONYMOUS )
{
$board_config['default_lang'] = $userdata['user_lang'];
$board_config['default_dateformat'] = $userdata['user_dateformat'];
$board_config['board_timezone'] = $userdata['user_timezone'];
}
if ( !file_exists($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_main.' . $phpEx) )
{
$board_config['default_lang'] = 'english';
}
include($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_main.' . $phpEx);
if ( defined('IN_ADMIN') )
{
if ( !file_exists($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_admin.'.$phpEx) )
{
$board_config['default_lang'] = 'english';
}
include($phpbb_root_path . 'language/lang_' . $board_config['default_lang'] . '/lang_admin.' . $phpEx);
}
//
// Set up style
//
$style = ( !$board_config['override_user_style'] && $userdata['user_id'] != ANONYMOUS ) ? $userdata['user_style'] : $board_config['default_style'];
$sql = "SELECT t.template_path, t.poll_length, t.pm_box_length, c.css_data, c.css_external, i.*
FROM " . STYLES_TABLE . " s, " . STYLES_TPL_TABLE . " t, " . STYLES_CSS_TABLE . " c, " . STYLES_IMAGE_TABLE . " i
WHERE s.style_id = $style
AND t.template_id = s.template_id
AND c.theme_id = s.style_id
AND i.imageset_id = s.imageset_id";
$result = $db->sql_query($sql);
if ( !($theme = $db->sql_fetchrow($result)) )
{
message_die(ERROR, 'Could not get style data [ id ' . $style . ' ]');
}
if ( $template = new Template($theme['template_path']) )
{
$img_lang = ( file_exists('imageset/' . $theme['imageset_path'] . '/lang_' . $board_config['default_lang']) ) ? $board_config['default_lang'] : 'english';
$i10n = array('post_new', 'post_locked', 'post_pm', 'reply_new', 'reply_pm', 'reply_locked', 'icon_quote', 'icon_edit', 'icon_search', 'icon_profile', 'icon_pm', 'icon_email', 'icon_www', 'icon_icq', 'icon_aim', 'icon_yim', 'icon_msnm', 'icon_delete', 'icon_ip', 'icon_no_email', 'icon_no_www', 'icon_no_icq', 'icon_no_aim', 'icon_no_yim', 'icon_no_msnm');
for($i = 0; $i < sizeof($i10n); $i++)
{
$theme[$i10n[$i]] = str_replace('{LANG}', 'lang_' . $img_lang, $theme[$i10n[$i]]);
}
}
return;
}
}
//
// Will be keeping my eye of 'other products' to ensure these things don't
// mysteriously appear elsewhere, think up your own solutions!
//
class acl
{
var $founder = false;
var $acl = false;
function acl(&$userdata, $forum_id = false, $extra_options = false)
{
global $db;
if ( !($this->founder = $userdata['user_founder']) )
{
$and_sql = "ao.auth_option LIKE 'list'";
if ( $extra_options )
{
$tmp_ary = explode(',', $extra_options);
foreach ( $tmp_ary as $option )
{
$and_sql .= " OR ao.auth_option LIKE '" . trim($option) . "'";
}
}
$and_sql = ( !$forum_id ) ? $and_sql : "( a.forum_id = $forum_id ) OR ( a.forum_id <> $forum_id AND ( ao.auth_option LIKE 'list' OR ao.auth_type LIKE 'mod' ) )";
$and_sql .= " OR ao.auth_type LIKE 'admin'";
$sql = "SELECT a.forum_id, a.auth_allow_deny, ao.auth_type, ao.auth_option
FROM " . ACL_GROUPS_TABLE . " a, " . ACL_OPTIONS_TABLE . " ao, " . USER_GROUP_TABLE . " ug
WHERE ug.user_id = " . $userdata['user_id'] . "
AND a.group_id = ug.group_id
AND ao.auth_option_id = a.auth_option_id
AND ( $and_sql )";
$result = $db->sql_query($sql);
if ( $row = $db->sql_fetchrow($result) )
{
do
{
switch ( $this->acl[$row['forum_id']][$row['auth_type']][$row['auth_option']] )
{
case ACL_PERMIT:
case ACL_DENY:
case ACL_PREVENT:
break;
default:
$this->acl[$row['forum_id']][$row['auth_type']][$row['auth_option']] = $row['auth_allow_deny'];
}
}
while ( $row = $db->sql_fetchrow($result) );
}
$db->sql_freeresult($result);
$sql = "SELECT a.forum_id, a.auth_allow_deny, ao.auth_type, ao.auth_option
FROM " . ACL_USERS_TABLE . " a, " . ACL_OPTIONS_TABLE . " ao
WHERE a.user_id = " . $userdata['user_id'] . "
AND ao.auth_option_id = a.auth_option_id
AND ( $and_sql )";
$result = $db->sql_query($sql);
if ( $row = $db->sql_fetchrow($result) )
{
do
{
switch ( $this->acl[$row['forum_id']][$row['auth_type']][$row['auth_option']] )
{
case ACL_PERMIT:
case ACL_PREVENT:
break;
default:
$this->acl[$row['forum_id']][$row['auth_type']][$row['auth_option']] = $row['auth_allow_deny'];
break;
}
}
while ( $row = $db->sql_fetchrow($result) );
}
$db->sql_freeresult($result);
if ( is_array($this->acl) )
{
foreach ( $this->acl as $forum_id => $auth_ary )
{
foreach ( $auth_ary as $type => $option_ary )
{
foreach ( $option_ary as $option => $value )
{
switch ( $value )
{
case ACL_ALLOW:
case ACL_PERMIT:
$this->acl[$forum_id][$type][$option] = 1;
break;
case ACL_DENY:
case ACL_PREVENT:
$this->acl[$forum_id][$type][$option] = 0;
break;
}
}
}
}
}
}
// print_r($this->acl);
return;
}
function get_acl($forum_id, $auth_main, $auth_type = false)
{
if ( $this->founder )
{
return true;
}
else if ( $auth_main && $auth_type )
{
return $this->acl[$forum_id][$auth_main][$auth_type];
}
else if ( !$auth_type && is_array($this->acl[$forum_id][$auth_main]) )
{
return array_sum($this->acl[$forum_id][$auth_main]);
}
}
function get_acl_admin($auth_type = false)
{
return ( $this->founder ) ? true : $this->get_acl(0, 'admin', $auth_type);
}
function set_acl_user(&$forum_id, &$user_id, &$auth, $dependencies = array())
{
global $db;
$forum_sql = ( $forum_id ) ? "AND a.forum_id IN ($forum_id, 0)" : '';
$sql = "SELECT a.user_id, o.auth_type, o.auth_option_id, o.auth_option, a.auth_allow_deny FROM " . ACL_USERS_TABLE . " a, " . ACL_OPTIONS_TABLE . " o, " . USERS_TABLE . " u WHERE a.auth_option_id = o.auth_option_id $forum_sql AND u.user_id = a.user_id AND a.user_id = $user_id";
$result = $db->sql_query($sql);
$user_auth = array();
if ( $row = $db->sql_fetchrow($result) )
{
do
{
$user_auth[$row['user_id']][$row['auth_type']][$row['auth_option_id']] = $row['auth_allow_deny'];
}
while ( $row = $db->sql_fetchrow($result) );
}
$db->sql_freeresult($result);
foreach ( $auth as $auth_type => $auth_option_ary )
{
foreach ( $auth_option_ary as $auth_option => $allow )
{
if ( !empty($user_auth) )
{
foreach ( $user_auth as $user => $user_auth_ary )
{
$user_auth[$user][$auth_type][$auth_option] = $allow;
$sql_ary[] = ( !isset($user_auth_ary[$auth_type][$auth_option]) ) ? "INSERT INTO " . ACL_USERS_TABLE . " (user_id, forum_id, auth_option_id, auth_allow_deny) VALUES ($user_id, $forum_id, $auth_option, $allow)" : ( ( $user_auth_ary[$auth_type][$auth_option] != $allow ) ? "UPDATE " . ACL_USERS_TABLE . " SET auth_allow_deny = $allow WHERE user_id = $user_id AND forum_id = $forum_id and auth_option_id = $auth_option" : '' );
}
}
else
{
$user_auth[$user_id][$auth_type][$auth_option] = $allow;
$sql_ary[] = "INSERT INTO " . ACL_USERS_TABLE . " (user_id, forum_id, auth_option_id, auth_allow_deny) VALUES ($user_id, $forum_id, $auth_option, $allow)";
}
}
}
foreach ( $sql_ary as $sql )
{
$db->sql_query($sql);
}
unset($user_auth);
unset($sql_ary);
}
function set_acl_group(&$forum_id, &$group_id, &$auth, $dependencies = array())
{
global $db;
$forum_sql = ( $forum_id ) ? "AND a.forum_id IN ($forum_id, 0)" : '';
$sql = "SELECT a.group_id, o.auth_type, o.auth_option_id, o.auth_option, a.auth_allow_deny FROM " . ACL_GROUPS_TABLE . " a, " . ACL_OPTIONS_TABLE . " o WHERE a.auth_option_id = o.auth_option_id $forum_sql AND a.group_id = $group_id";
$result = $db->sql_query($sql);
$group_auth = array();
if ( $row = $db->sql_fetchrow($result) )
{
do
{
$group_auth[$row['group_id']][$row['auth_type']][$row['auth_option_id']] = $row['auth_allow_deny'];
}
while ( $row = $db->sql_fetchrow($result) );
}
$db->sql_freeresult($result);
foreach ( $auth as $auth_type => $auth_option_ary )
{
foreach ( $auth_option_ary as $auth_option => $allow )
{
if ( !empty($group_auth) )
{
foreach ( $group_auth as $group => $group_auth_ary )
{
$sql_ary[] = ( !isset($group_auth_ary[$auth_type][$auth_option]) ) ? "INSERT INTO " . ACL_GROUPS_TABLE . " (group_id, forum_id, auth_option_id, auth_allow_deny) VALUES ($group_id, $forum_id, $auth_option, $allow)" : ( ( $group_auth_ary[$auth_type][$auth_option] != $allow ) ? "UPDATE " . ACL_GROUPS_TABLE . " SET auth_allow_deny = $allow WHERE group_id = $group_id AND forum_id = $forum_id and auth_option_id = $auth_option" : '' );
}
}
else
{
$sql_ary[] = "INSERT INTO " . ACL_GROUPS_TABLE . " (group_id, forum_id, auth_option_id, auth_allow_deny) VALUES ($group_id, $forum_id, $auth_option, $allow)";
}
}
}
foreach ( $sql_ary as $sql )
{
$db->sql_query($sql);
}
unset($group_auth);
unset($sql_ary);
}
function delete_acl_user($forum_id, $user_id, $auth_type = false)
{
global $db;
$auth_sql = ( $auth_type != '' ) ? " AND auth_option_id IN ()" : "";
$sql = "DELETE FROM " . ACL_USERS_TABLE . "
WHERE user_id = $user_id
AND forum_id = $forum_id";
$db->sql_query($sql);
}
function delete_acl_group($forum_id, $group_id, $auth_type = false)
{
global $db;
$auth_sql = ( $auth_type != '' ) ? " AND auth_option_id IN ()" : "";
$sql = "DELETE FROM " . ACL_GROUPS_TABLE . "
WHERE group_id = $group_id
AND forum_id = $forum_id";
$db->sql_query($sql);
}
}
//
// Authentication plug-ins is largely down to
// Sergey Kanareykin, our thanks to him.
//
class login
{
function login($username, $password, $autologin = false)
{
global $SID, $db, $board_config, $lang, $user_ip, $session;
global $HTTP_SERVER_VARS, $HTTP_ENV_VARS, $phpEx;
$user_page = ( !empty($HTTP_SERVER_VARS['PHP_SELF']) ) ? $HTTP_SERVER_VARS['PHP_SELF'] : $HTTP_ENV_VARS['PHP_SELF'];
$user_page .= '&' . ( ( !empty($HTTP_SERVER_VARS['QUERY_STRING']) ) ? $HTTP_SERVER_VARS['QUERY_STRING'] : $HTTP_ENV_VARS['QUERY_STRING'] );
$this_browser = ( !empty($HTTP_SERVER_VARS['HTTP_USER_AGENT']) ) ? $HTTP_SERVER_VARS['HTTP_USER_AGENT'] : $HTTP_ENV_VARS['HTTP_USER_AGENT'];
$method = trim($board_config['auth_method']);
if ( file_exists('includes/auth/auth_' . $method . '.' . $phpEx) )
{
include_once('includes/auth/auth_' . $method . '.' . $phpEx);
$method = 'login_' . $method;
if ( function_exists($method) )
{
if ( !($user = $method($username, $password)) )
{
return false;
}
$autologin = ( isset($autologin) ) ? md5($password) : '';
return ( $user['user_active'] ) ? $session->create($user['user_id'], $autologin, $user_page, $this_browser) : false;
}
}
message_die(ERROR, 'Authentication method not found');
}
}
?>