<?php
/***************************************************************************
* sessions.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 $userdata;
function start($update = true)
{
global $SID, $db, $board_config, $user_ip;
global $HTTP_SERVER_VARS, $HTTP_ENV_VARS, $HTTP_COOKIE_VARS, $HTTP_GET_VARS;
$current_time = time();
$session_browser = ( !empty($HTTP_SERVER_VARS['HTTP_USER_AGENT']) ) ? $HTTP_SERVER_VARS['HTTP_USER_AGENT'] : $HTTP_ENV_VARS['HTTP_USER_AGENT'];
$this_page = ( !empty($HTTP_SERVER_VARS['PHP_SELF']) ) ? $HTTP_SERVER_VARS['PHP_SELF'] : $HTTP_ENV_VARS['PHP_SELF'];
$this_page .= '&' . ( ( !empty($HTTP_SERVER_VARS['QUERY_STRING']) ) ? $HTTP_SERVER_VARS['QUERY_STRING'] : $HTTP_ENV_VARS['QUERY_STRING'] );
if ( isset($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'])) : '';
$session_id = ( isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_sid']) ) ? $HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_sid'] : '';
$sessionmethod = SESSION_METHOD_COOKIE;
}
else
{
$session_data = '';
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
$sessionmethod = SESSION_METHOD_GET;
}
//
// Load limit check (if applicable)
//
if ( !empty($board_config['limit_load']) && file_exists('/proc/loadavg') )
{
if ( $load = file('/proc/loadavg') )
{
$load = explode(' ', $load[0]);
if ( intval($load[0]) > $board_config['limit_load'] )
{
message_die(GENERAL_MESSAGE, 'Board_unavailable', 'Information');
}
}
}
if ( !empty($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);
}
$this->userdata = $db->sql_fetchrow($result);
//
// Did the session exist in the DB?
//
if ( isset($this->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('.', $this->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] )
{
$SID = '?sid=' . ( ( $sessionmethod == SESSION_METHOD_GET ) ? $session_id : '' );
//
// Only update session DB a minute or so after last update or if page changes
//
if ( ( $current_time - $this->userdata['session_time'] > 60 || $this->userdata['session_page'] != $this_page ) && $update )
{
$sql = "UPDATE " . SESSIONS_TABLE . "
SET session_time = $current_time, session_page = '$this_page'
WHERE session_id = '" . $this->userdata['session_id'] . "'";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error updating sessions table', '', __LINE__, __FILE__, $sql);
}
//
// Garbage collection ... remove old sessions updating user information
// if necessary
//
if ( $current_time - $board_config['session_gc'] > $board_config['session_last_gc'] )
{
$this->gc($current_time);
}
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', $session_id, 0, $board_config['cookie_path'], $board_config['cookie_domain'], $board_config['cookie_secure']);
}
$this->config();
return $this->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']) ) ? $sessiondata['userid'] : ANONYMOUS;
//
// Limit connections (for MySQL) or 5 minute sessions (for other DB's)
//
switch ( DB_LAYER )
{
case 'mysql':
case 'mysql4':
$sql = "SELECT COUNT(*) AS sessions
FROM " . SESSIONS_TABLE . "
WHERE session_time >= " . ( $current_time - 3600 );
break;
default:
$sql = "SELECT COUNT(*) AS sessions
FROM " . SESSIONS_TABLE . "
WHERE session_time >= " . ( $current_time - 3600 );
break;
}
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Could not obtain connection information', '', __LINE__, __FILE__, $sql);
}
$row = $db->sql_fetchrow[$result];
if ( intval($board_config['active_sessions']) && $row['sessions'] >= intval($board_config['active_sessions']) )
{
message_die(GENERAL_MESSAGE, 'Board_unavailable', 'Information');
}
$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);
}
$this->userdata = $db->sql_fetchrow($result);
//
// Check autologin request, is it valid?
//
if ( $this->userdata['user_password'] != $autologin || !$this->userdata['user_active'] || $user_id == ANONYMOUS )
{
$autologin = '';
$this->userdata['user_id'] = $user_id = ANONYMOUS;
}
$user_ip_parts = explode('.', $user_ip);
$sql = "SELECT ban_ip, ban_userid, ban_email
FROM " . BANLIST_TABLE . "
WHERE ban_ip IN (
'" . $user_ip_parts[0] . ".',
'" . $user_ip_parts[0] . "." . $user_ip_parts[1] . ".',
'" . $user_ip_parts[0] . "." . $user_ip_parts[1] . "." . $user_ip_parts[2] . ".',
'" . $user_ip_parts[0] . "." . $user_ip_parts[1] . "." . $user_ip_parts[2] . "." . $user_ip_parts[3] . "')
OR ban_userid = " . $this->userdata['user_id'];
if ( $user_id != ANONYMOUS )
{
$sql .= " OR ban_email LIKE '" . str_replace('\\\'', '\\\'\\\'', $this->userdata['user_email']) . "'
OR ban_email LIKE '" . substr(str_replace('\\\'', '\\\'\\\'', $this->userdata['user_email']), strpos(str_replace('\\\'', '\\\'\\\'', $this->userdata['user_email']), '@')) . "'";
}
if ( !($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 = $current_time, session_browser = '$session_browser', session_page = '$this_page'
WHERE session_id = '$session_id'";
if ( !$db->sql_query($sql) || !$db->sql_affectedrows() )
{
$session_id = md5(uniqid($user_ip));
$sql = "INSERT INTO " . SESSIONS_TABLE . "
(session_id, session_user_id, session_start, session_time, session_ip, session_browser, session_page)
VALUES ('$session_id', $user_id, $current_time, $current_time, '$user_ip', '$session_browser', '$this_page')";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error creating new session', '', __LINE__, __FILE__, $sql);
}
}
$SID = '?sid=' . ( ( $sessionmethod == SESSION_METHOD_GET ) ? $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', $session_id, 0, $board_config['cookie_path'], $board_config['cookie_domain'], $board_config['cookie_secure']);
$this->userdata['session_id'] = $session_id;
$this->config();
return $this->userdata;
}
function destroy($userdata)
{
global $SID, $db, $board_config, $user_ip;
global $HTTP_SERVER_VARS, $HTTP_ENV_VARS, $HTTP_COOKIE_VARS, $HTTP_GET_VARS;
if ( isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_sid']) )
{
$session_id = ( isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_sid']) ) ? $HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_sid'] : '';
}
else
{
$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
}
//
// 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 = " . $userdata['user_id'];
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Could not update user session info', '', __LINE__, __FILE__, $sql);
}
$sql = "DELETE FROM " . SESSIONS_TABLE . "
WHERE session_id = '" . $userdata['session_id'] . "'
AND session_user_id = " . $userdata['user_id'];
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error removing user session', '', __LINE__, __FILE__, $sql);
}
$SID = '?sid=';
setcookie($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'], $board_config['cookie_secure']);
return true;
}
function gc($current_time)
{
global $db, $board_config, $user_ip;
$sql = "SELECT *
FROM " . SESSIONS_TABLE . "
WHERE session_time < " . ( $current_time - $board_config['session_length'] );
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Could not obtain expired session list', '', __LINE__, __FILE__, $sql);
}
$del_session_id = '';
while ( $row = $db->sql_fetchrow($result) )
{
if ( $row['session_logged_in'] )
{
$sql = "UPDATE " . USERS_TABLE . "
SET user_lastvisit = " . $row['session_time'] . ", user_session_page = '" . $row['session_page'] . "'
WHERE user_id = " . $row['session_user_id'];
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Could not update user session info', '', __LINE__, __FILE__, $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)";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Error clearing sessions table', '', __LINE__, __FILE__, $sql);
}
}
$sql = "UPDATE " . CONFIG_TABLE . "
SET config_value = '$current_time'
WHERE config_name = 'session_last_gc'";
if ( !$db->sql_query($sql) )
{
message_die(CRITICAL_ERROR, 'Could not update session gc time', '', __LINE__, __FILE__, $sql);
}
return;
}
function config()
{
global $db, $template, $lang, $board_config, $theme, $images;
global $phpEx, $phpbb_root_path;
if ( $this->userdata['user_id'] != ANONYMOUS )
{
if ( !empty($this->userdata['user_lang']))
{
$board_config['default_lang'] = $this->userdata['user_lang'];
}
if ( !empty($this->userdata['user_dateformat']) )
{
$board_config['default_dateformat'] = $this->userdata['user_dateformat'];
}
if ( isset($this->userdata['user_timezone']) )
{
$board_config['board_timezone'] = $this->userdata['user_timezone'];
}
}
if ( !file_exists($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'] && $this->userdata['user_id'] != ANONYMOUS && $this->userdata['user_style'] > 0 )? $this->userdata['user_style'] : $board_config['default_style'];
$sql = "SELECT s.style_name, s.template_name, c.css_data, c.css_extra_data
FROM " . STYLES_TABLE . " s, " . STYLES_CSS_TABLE . " c
WHERE s.style_id = $style
AND c.theme_id = s.style_id";
if ( !($result = $db->sql_query($sql)) )
{
message_die(CRITICAL_ERROR, 'Could not query database for theme info');
}
if ( !($theme = $db->sql_fetchrow($result)) )
{
message_die(CRITICAL_ERROR, "Could not get theme data for themes_id [$style]");
}
//
// Unserialize the extra data
//
$theme['css_extra_data'] = unserialize($theme['css_extra_data']);
$template_path = 'templates/' ;
$template_name = $theme['template_name'] ;
$template = new Template($phpbb_root_path . $template_path . $template_name);
if ( $template )
{
$current_template_path = $template_path . $template_name;
@include($phpbb_root_path . $template_path . $template_name . '/' . $template_name . '.cfg');
if ( !defined('TEMPLATE_CONFIG') )
{
message_die(CRITICAL_ERROR, "Could not open $template_name template config file", '', __LINE__, __FILE__);
}
$img_lang = ( file_exists($current_template_path . '/images/lang_' . $board_config['default_lang']) ) ? $board_config['default_lang'] : 'english';
while ( list($key, $value) = @each($images) )
{
if ( !is_array($value) )
{
$images[$key] = str_replace('{LANG}', 'lang_' . $img_lang, $value);
}
}
}
return;
}
}
//
// Note this doesn't use the prefetch at present and is very
// incomplete ... purely for testing ... will be keeping my
// eye of 'other products' to ensure these things don't
// mysteriously appear elsewhere, think up your own solutions!
//
class auth {
var $acl;
function auth($userdata)
{
global $db;
$sql = "SELECT ag.forum_id, ag.auth_allow_deny, ao.auth_option
FROM " . USER_GROUP_TABLE . " ug, " . ACL_GROUPS_TABLE . " ag, " . ACL_OPTIONS_TABLE . " ao
WHERE ug.user_id = " . $userdata['user_id'] . "
AND ag.group_id = ug.group_id
AND ao.auth_option_id = ag.auth_option_id";
if ( !($result = $db->sql_query($sql)) )
{
message_die(GENERAL_ERROR, 'Failed obtaining forum access control lists', '', __LINE__, __FILE__, $sql);
}
if ( $row = $db->sql_fetchrow($result) )
{
do
{
list($option_main, $option_type) = explode('_', $row['auth_option']);
$this->acl[$row['forum_id']][$option_main][$option_type] = $row['auth_allow_deny'];
}
while ( $row = $db->sql_fetchrow($result) );
}
$db->sql_freeresult($result);
$sql = "SELECT au.forum_id, au.auth_allow_deny, ao.auth_option
FROM " . ACL_USERS_TABLE . " au, " . ACL_OPTIONS_TABLE . " ao
WHERE au.user_id = " . $userdata['user_id'] . "
AND ao.auth_option_id = au.auth_option_id";
if ( !($result = $db->sql_query($sql)) )
{
message_die(GENERAL_ERROR, 'Failed obtaining forum access control lists', '', __LINE__, __FILE__, $sql);
}
if ( $row = $db->sql_fetchrow($result) )
{
do
{
list($option_main, $option_type) = explode('_', $row['auth_option']);
$this->acl[$row['forum_id']][$option_main][$option_type] = ( isset($this->acl[$row['forum_id']][$option_main][$option_type]) ) ? $this->acl[$row['forum_id']][$option_main][$option_type] && $row['auth_allow_deny'] : $row['auth_allow_deny'];
}
while ( $row = $db->sql_fetchrow($result) );
}
$db->sql_freeresult($result);
return;
}
function get_acl($forum_id = false, $auth_main = false, $auth_type = false)
{
if ( !$forum_id )
{
if ( !$auth_type && is_array($this->acl) )
{
@reset($this->acl);
while ( list(, $value1) = @each($this->acl) )
{
while ( list(, $value2) = @each($value1) )
{
while ( list(, $value3) = @each($value2) )
{
if ( $value3 )
{
return true;
}
}
}
}
return false;
}
else if ( !$auth_main && is_array($this->acl) )
{
@reset($this->acl);
while ( list(, $value1) = each($this->acl) )
{
while ( list(, $value2) = each($value1) )
{
if ( $value2[$auth_type] )
{
return true;
}
}
}
return false;
}
else
{
return $this->acl;
}
}
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]) )
{
@reset($this->acl);
while ( list(, $value) = @each($this->acl[$forum_id][$auth_main]) )
{
if ( $value )
{
return true;
}
}
return false;
}
else if ( !$auth_main && is_array($this->acl[$forum_id]) )
{
@reset($this->acl);
while ( list(, $value) = each($this->acl[$forum_id]) )
{
if ( $value[$auth_type] )
{
return true;
}
}
return false;
}
else
{
return $this->acl[$forum_id];
}
}
function set_acl($ug_data, $forum_id = false, $auth_list = false, $dependencies = false)
{
global $db;
$dependencies = array_merge($dependencies, array(
'admin' => 'mod',
'mod' => 'forum')
);
}
}
//
// Centralised login? May stay, may not ... depends if needed
//
function login($username, $password, $autologin = false)
{
global $SID, $db, $board_config, $lang, $user_ip;
global $HTTP_SERVER_VARS, $HTTP_ENV_VARS;
$this_page = ( !empty($HTTP_SERVER_VARS['PHP_SELF']) ) ? $HTTP_SERVER_VARS['PHP_SELF'] : $HTTP_ENV_VARS['PHP_SELF'];
$this_page .= '&' . ( ( !empty($HTTP_SERVER_VARS['QUERY_STRING']) ) ? $HTTP_SERVER_VARS['QUERY_STRING'] : $HTTP_ENV_VARS['QUERY_STRING'] );
$result = false;
$sql = "SELECT user_id, username, user_password, user_email, user_active, user_level
FROM " . USERS_TABLE . "
WHERE username = '" . str_replace("\'", "''", $username) . "'";
if ( !($result = $db->sql_query($sql)) )
{
message_die(GENERAL_ERROR, 'Error in obtaining userdata', '', __LINE__, __FILE__, $sql);
}
if ( $row = $db->sql_fetchrow($result) )
{
if ( $row['user_level'] != ADMIN && $board_config['board_disable'] )
{
// header($header_location . "index.$phpEx$SID");
// exit;
}
if ( $board_config['ldap_enable'] && extension_loaded('ldap') )
{
if ( !($ldap_id = @ldap_connect($board_config['ldap_hostname'])) )
{
//
// FINISH
//
@ldap_unbind($ldap_id);
}
}
else
{
if ( md5($password) == $row['user_password'] && $row['user_active'] )
{
$autologin = ( isset($autologin) ) ? md5($password) : '';
$user_ip_parts = explode('.', $user_ip);
$sql = "SELECT ban_ip, ban_userid, ban_email
FROM " . BANLIST_TABLE . "
WHERE ban_ip IN (
'" . $user_ip_parts[0] . ".',
'" . $user_ip_parts[0] . "." . $user_ip_parts[1] . ".',
'" . $user_ip_parts[0] . "." . $user_ip_parts[1] . "." . $user_ip_parts[2] . ".',
'" . $user_ip_parts[0] . "." . $user_ip_parts[1] . "." . $user_ip_parts[2] . "." . $user_ip_parts[3] . "')
OR ban_userid = " . $row['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');
}
}
$session_browser = ( !empty($HTTP_SERVER_VARS['HTTP_USER_AGENT']) ) ? $HTTP_SERVER_VARS['HTTP_USER_AGENT'] : $HTTP_ENV_VARS['HTTP_USER_AGENT'];
$current_time = time();
//
// Update the session
//
$sql = "UPDATE " . SESSIONS_TABLE . "
SET session_user_id = " . $row['user_id'] . ", session_start = $current_time, session_time = $current_time, session_browser = '$session_browser', session_page = '$this_page'
WHERE session_id = '" . $userdata['session_id'] . "'";
if ( !$db->sql_query($sql) )
{
message_die(GENERAL_ERROR, 'Could not update session post-login', '', __LINE__, __FILE__, $sql);
}
$sessiondata['autologinid'] = ( $autologin && $user_id != ANONYMOUS ) ? $autologin : '';
$sessiondata['userid'] = $row['user_id'];
setcookie($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', $userdata['session_id'], 0, $board_config['cookie_path'], $board_config['cookie_domain'], $board_config['cookie_secure']);
$result = true;
}
}
}
return $result;
}
?>