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a44002aefe
git-svn-id: file:///svn/phpbb/branches/phpBB-2_0_0@5930 89ea8834-ac86-4346-8a33-228a782c2dd0
578 lines
No EOL
18 KiB
PHP
578 lines
No EOL
18 KiB
PHP
<?php
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/***************************************************************************
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* sessions.php
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* -------------------
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* begin : Saturday, Feb 13, 2001
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* copyright : (C) 2001 The phpBB Group
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* email : support@phpbb.com
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*
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* $Id$
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*
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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***************************************************************************/
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//
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// Adds/updates a new session to the database for the given userid.
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// Returns the new session ID on success.
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//
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function session_begin($user_id, $user_ip, $page_id, $auto_create = 0, $enable_autologin = 0, $admin = 0)
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{
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global $db, $board_config;
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global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID;
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$cookiename = $board_config['cookie_name'];
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$cookiepath = $board_config['cookie_path'];
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$cookiedomain = $board_config['cookie_domain'];
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$cookiesecure = $board_config['cookie_secure'];
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if ( isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) || isset($HTTP_COOKIE_VARS[$cookiename . '_data']) )
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{
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$session_id = isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) ? $HTTP_COOKIE_VARS[$cookiename . '_sid'] : '';
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$sessiondata = isset($HTTP_COOKIE_VARS[$cookiename . '_data']) ? unserialize(stripslashes($HTTP_COOKIE_VARS[$cookiename . '_data'])) : array();
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$sessionmethod = SESSION_METHOD_COOKIE;
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}
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else
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{
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$sessiondata = array();
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$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
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$sessionmethod = SESSION_METHOD_GET;
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}
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//
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if (!preg_match('/^[A-Za-z0-9]*$/', $session_id))
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{
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$session_id = '';
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}
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$page_id = (int) $page_id;
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$last_visit = 0;
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$current_time = time();
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//
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// Are auto-logins allowed?
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// If allow_autologin is not set or is true then they are
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// (same behaviour as old 2.0.x session code)
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//
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if (isset($board_config['allow_autologin']) && !$board_config['allow_autologin'])
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{
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$enable_autologin = $sessiondata['autologinid'] = false;
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}
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//
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// First off attempt to join with the autologin value if we have one
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// If not, just use the user_id value
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//
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$userdata = array();
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if ($user_id != ANONYMOUS)
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{
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if (isset($sessiondata['autologinid']) && (string) $sessiondata['autologinid'] != '' && $user_id)
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{
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$sql = 'SELECT u.*
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FROM ' . USERS_TABLE . ' u, ' . SESSIONS_KEYS_TABLE . ' k
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WHERE u.user_id = ' . (int) $user_id . "
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AND u.user_active = 1
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AND k.user_id = u.user_id
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AND k.key_id = '" . md5($sessiondata['autologinid']) . "'";
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if (!($result = $db->sql_query($sql)))
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{
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message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql);
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}
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$userdata = $db->sql_fetchrow($result);
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$db->sql_freeresult($result);
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$enable_autologin = $login = 1;
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}
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else if (!$auto_create)
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{
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$sessiondata['autologinid'] = '';
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$sessiondata['userid'] = $user_id;
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$sql = 'SELECT *
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FROM ' . USERS_TABLE . '
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WHERE user_id = ' . (int) $user_id . '
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AND user_active = 1';
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if (!($result = $db->sql_query($sql)))
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{
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message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql);
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}
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$userdata = $db->sql_fetchrow($result);
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$db->sql_freeresult($result);
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$login = 1;
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}
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}
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//
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// At this point either $userdata should be populated or
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// one of the below is true
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// * Key didn't match one in the DB
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// * User does not exist
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// * User is inactive
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//
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if (!sizeof($userdata) || !is_array($userdata) || !$userdata)
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{
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$sessiondata['autologinid'] = '';
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$sessiondata['userid'] = $user_id = ANONYMOUS;
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$enable_autologin = $login = 0;
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$sql = 'SELECT *
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FROM ' . USERS_TABLE . '
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WHERE user_id = ' . (int) $user_id;
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if (!($result = $db->sql_query($sql)))
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{
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message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql);
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}
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$userdata = $db->sql_fetchrow($result);
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$db->sql_freeresult($result);
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}
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//
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// Initial ban check against user id, IP and email address
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//
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preg_match('/(..)(..)(..)(..)/', $user_ip, $user_ip_parts);
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$sql = "SELECT ban_ip, ban_userid, ban_email
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FROM " . BANLIST_TABLE . "
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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')
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OR ban_userid = $user_id";
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if ( $user_id != ANONYMOUS )
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{
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$sql .= " OR ban_email LIKE '" . str_replace("\'", "''", $userdata['user_email']) . "'
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OR ban_email LIKE '" . substr(str_replace("\'", "''", $userdata['user_email']), strpos(str_replace("\'", "''", $userdata['user_email']), "@")) . "'";
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}
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if ( !($result = $db->sql_query($sql)) )
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{
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message_die(CRITICAL_ERROR, 'Could not obtain ban information', '', __LINE__, __FILE__, $sql);
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}
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if ( $ban_info = $db->sql_fetchrow($result) )
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{
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if ( $ban_info['ban_ip'] || $ban_info['ban_userid'] || $ban_info['ban_email'] )
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{
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message_die(CRITICAL_MESSAGE, 'You_been_banned');
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}
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}
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//
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// Create or update the session
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//
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$sql = "UPDATE " . SESSIONS_TABLE . "
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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
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WHERE session_id = '" . $session_id . "'
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AND session_ip = '$user_ip'";
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if ( !$db->sql_query($sql) || !$db->sql_affectedrows() )
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{
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$session_id = md5(dss_rand());
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$sql = "INSERT INTO " . SESSIONS_TABLE . "
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(session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin)
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VALUES ('$session_id', $user_id, $current_time, $current_time, '$user_ip', $page_id, $login, $admin)";
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if ( !$db->sql_query($sql) )
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{
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message_die(CRITICAL_ERROR, 'Error creating new session', '', __LINE__, __FILE__, $sql);
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}
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}
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if ( $user_id != ANONYMOUS )
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{
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$last_visit = ( $userdata['user_session_time'] > 0 ) ? $userdata['user_session_time'] : $current_time;
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if (!$admin)
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{
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$sql = "UPDATE " . USERS_TABLE . "
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SET user_session_time = $current_time, user_session_page = $page_id, user_lastvisit = $last_visit
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WHERE user_id = $user_id";
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if ( !$db->sql_query($sql) )
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{
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message_die(CRITICAL_ERROR, 'Error updating last visit time', '', __LINE__, __FILE__, $sql);
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}
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}
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$userdata['user_lastvisit'] = $last_visit;
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//
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// Regenerate the auto-login key
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//
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if ($enable_autologin)
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{
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$auto_login_key = dss_rand() . dss_rand();
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if (isset($sessiondata['autologinid']) && (string) $sessiondata['autologinid'] != '')
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{
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$sql = 'UPDATE ' . SESSIONS_KEYS_TABLE . "
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SET last_ip = '$user_ip', key_id = '" . md5($auto_login_key) . "', last_login = $current_time
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WHERE key_id = '" . md5($sessiondata['autologinid']) . "'";
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}
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else
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{
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$sql = 'INSERT INTO ' . SESSIONS_KEYS_TABLE . "(key_id, user_id, last_ip, last_login)
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VALUES ('" . md5($auto_login_key) . "', $user_id, '$user_ip', $current_time)";
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}
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if ( !$db->sql_query($sql) )
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{
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message_die(CRITICAL_ERROR, 'Error updating session key', '', __LINE__, __FILE__, $sql);
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}
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$sessiondata['autologinid'] = $auto_login_key;
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unset($auto_login_key);
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}
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else
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{
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$sessiondata['autologinid'] = '';
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}
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// $sessiondata['autologinid'] = (!$admin) ? (( $enable_autologin && $sessionmethod == SESSION_METHOD_COOKIE ) ? $auto_login_key : '') : $sessiondata['autologinid'];
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$sessiondata['userid'] = $user_id;
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}
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$userdata['session_id'] = $session_id;
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$userdata['session_ip'] = $user_ip;
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$userdata['session_user_id'] = $user_id;
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$userdata['session_logged_in'] = $login;
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$userdata['session_page'] = $page_id;
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$userdata['session_start'] = $current_time;
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$userdata['session_time'] = $current_time;
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$userdata['session_admin'] = $admin;
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$userdata['session_key'] = $sessiondata['autologinid'];
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setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure);
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setcookie($cookiename . '_sid', $session_id, 0, $cookiepath, $cookiedomain, $cookiesecure);
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$SID = 'sid=' . $session_id;
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return $userdata;
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}
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//
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// Checks for a given user session, tidies session table and updates user
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// sessions at each page refresh
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//
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function session_pagestart($user_ip, $thispage_id)
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{
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global $db, $lang, $board_config;
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global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID;
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$cookiename = $board_config['cookie_name'];
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$cookiepath = $board_config['cookie_path'];
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$cookiedomain = $board_config['cookie_domain'];
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$cookiesecure = $board_config['cookie_secure'];
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$current_time = time();
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unset($userdata);
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if ( isset($HTTP_COOKIE_VARS[$cookiename . '_sid']) || isset($HTTP_COOKIE_VARS[$cookiename . '_data']) )
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{
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$sessiondata = isset( $HTTP_COOKIE_VARS[$cookiename . '_data'] ) ? unserialize(stripslashes($HTTP_COOKIE_VARS[$cookiename . '_data'])) : array();
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$session_id = isset( $HTTP_COOKIE_VARS[$cookiename . '_sid'] ) ? $HTTP_COOKIE_VARS[$cookiename . '_sid'] : '';
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$sessionmethod = SESSION_METHOD_COOKIE;
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}
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else
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{
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$sessiondata = array();
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$session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
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$sessionmethod = SESSION_METHOD_GET;
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}
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//
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if (!preg_match('/^[A-Za-z0-9]*$/', $session_id))
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{
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$session_id = '';
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}
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$thispage_id = (int) $thispage_id;
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//
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// Does a session exist?
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//
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if ( !empty($session_id) )
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{
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//
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// session_id exists so go ahead and attempt to grab all
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// data in preparation
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//
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$sql = "SELECT u.*, s.*
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FROM " . SESSIONS_TABLE . " s, " . USERS_TABLE . " u
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WHERE s.session_id = '$session_id'
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AND u.user_id = s.session_user_id";
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if ( !($result = $db->sql_query($sql)) )
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{
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message_die(CRITICAL_ERROR, 'Error doing DB query userdata row fetch', '', __LINE__, __FILE__, $sql);
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}
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$userdata = $db->sql_fetchrow($result);
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//
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// Did the session exist in the DB?
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//
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if ( isset($userdata['user_id']) )
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{
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//
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// Do not check IP assuming equivalence, if IPv4 we'll check only first 24
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// bits ... I've been told (by vHiker) this should alleviate problems with
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// load balanced et al proxies while retaining some reliance on IP security.
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//
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$ip_check_s = substr($userdata['session_ip'], 0, 6);
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$ip_check_u = substr($user_ip, 0, 6);
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if ($ip_check_s == $ip_check_u)
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{
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$SID = ($sessionmethod == SESSION_METHOD_GET || defined('IN_ADMIN')) ? 'sid=' . $session_id : '';
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//
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// Only update session DB a minute or so after last update
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//
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if ( $current_time - $userdata['session_time'] > 60 )
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{
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// A little trick to reset session_admin on session re-usage
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$update_admin = (!defined('IN_ADMIN') && $current_time - $userdata['session_time'] > ($board_config['session_length']+60)) ? ', session_admin = 0' : '';
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$sql = "UPDATE " . SESSIONS_TABLE . "
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SET session_time = $current_time, session_page = $thispage_id$update_admin
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WHERE session_id = '" . $userdata['session_id'] . "'";
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if ( !$db->sql_query($sql) )
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{
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message_die(CRITICAL_ERROR, 'Error updating sessions table', '', __LINE__, __FILE__, $sql);
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}
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if ( $userdata['user_id'] != ANONYMOUS )
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{
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$sql = "UPDATE " . USERS_TABLE . "
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SET user_session_time = $current_time, user_session_page = $thispage_id
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WHERE user_id = " . $userdata['user_id'];
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if ( !$db->sql_query($sql) )
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{
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message_die(CRITICAL_ERROR, 'Error updating sessions table', '', __LINE__, __FILE__, $sql);
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}
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}
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session_clean($userdata['session_id']);
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setcookie($cookiename . '_data', serialize($sessiondata), $current_time + 31536000, $cookiepath, $cookiedomain, $cookiesecure);
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setcookie($cookiename . '_sid', $session_id, 0, $cookiepath, $cookiedomain, $cookiesecure);
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}
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// Add the session_key to the userdata array if it is set
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if ( isset($sessiondata['autologinid']) && $sessiondata['autologinid'] != '' )
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{
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$userdata['session_key'] = $sessiondata['autologinid'];
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}
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return $userdata;
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}
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}
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}
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//
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// If we reach here then no (valid) session exists. So we'll create a new one,
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// using the cookie user_id if available to pull basic user prefs.
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//
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$user_id = ( isset($sessiondata['userid']) ) ? intval($sessiondata['userid']) : ANONYMOUS;
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if ( !($userdata = session_begin($user_id, $user_ip, $thispage_id, TRUE)) )
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{
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message_die(CRITICAL_ERROR, 'Error creating user session', '', __LINE__, __FILE__, $sql);
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}
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return $userdata;
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}
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/**
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* Terminates the specified session
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* It will delete the entry in the sessions table for this session,
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* remove the corresponding auto-login key and reset the cookies
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*/
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function session_end($session_id, $user_id)
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{
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global $db, $lang, $board_config, $userdata;
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global $HTTP_COOKIE_VARS, $HTTP_GET_VARS, $SID;
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$cookiename = $board_config['cookie_name'];
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$cookiepath = $board_config['cookie_path'];
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$cookiedomain = $board_config['cookie_domain'];
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$cookiesecure = $board_config['cookie_secure'];
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$current_time = time();
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if (!preg_match('/^[A-Za-z0-9]*$/', $session_id))
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{
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return;
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}
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//
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// Delete existing session
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//
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$sql = 'DELETE FROM ' . SESSIONS_TABLE . "
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WHERE session_id = '$session_id'
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AND session_user_id = $user_id";
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if ( !$db->sql_query($sql) )
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{
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message_die(CRITICAL_ERROR, 'Error removing user session', '', __LINE__, __FILE__, $sql);
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}
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//
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// Remove this auto-login entry (if applicable)
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//
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if ( isset($userdata['session_key']) && $userdata['session_key'] != '' )
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{
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$autologin_key = md5($userdata['session_key']);
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$sql = 'DELETE FROM ' . SESSIONS_KEYS_TABLE . '
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WHERE user_id = ' . (int) $user_id . "
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AND key_id = '$autologin_key'";
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if ( !$db->sql_query($sql) )
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{
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message_die(CRITICAL_ERROR, 'Error removing auto-login key', '', __LINE__, __FILE__, $sql);
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}
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}
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//
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// We expect that message_die will be called after this function,
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// but just in case it isn't, reset $userdata to the details for a guest
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//
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$sql = 'SELECT *
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FROM ' . USERS_TABLE . '
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WHERE user_id = ' . ANONYMOUS;
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if ( !($result = $db->sql_query($sql)) )
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{
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message_die(CRITICAL_ERROR, 'Error obtaining user details', '', __LINE__, __FILE__, $sql);
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}
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if ( !($userdata = $db->sql_fetchrow($result)) )
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{
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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;
|
|
}
|
|
|
|
?>
|