+++ /dev/null
-<?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;
-}
-
-?>
\ No newline at end of file