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<?php
/* OpenDb - Open Media Lending Database
Copyright (C) 2001,2002 by Jason Pell
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.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
include_once("./functions/user.php");
include_once("./functions/utils.php");
include_once("./functions/http.php");
/*
*
*/
function is_site_public_access_enabled()
{
global $CONFIG_VARS;
global $HTTP_SESSION_VARS;
return ($CONFIG_VARS['site.public_access.enable'] === TRUE &&
strlen($CONFIG_VARS['site.public_access.user_id'])>0 &&
$HTTP_SESSION_VARS['user_id'] === $CONFIG_VARS['site.public_access.user_id']);
}
/**
*/
function is_opendb_valid_session()
{
// from config.php
global $CONFIG_VARS;
global $HTTP_SESSION_VARS;
// If the site is currently disabled, no sessions can be considered valid.
if($CONFIG_VARS['site.enable']!==FALSE)
{
// Public access to OpenDb for configured user.
if(is_site_public_access_enabled())
{
// include/begin.inc.php already exported the $HTTP_SESSION_VARS['user_id']
if(strlen($HTTP_SESSION_VARS['user_id'])>0 && is_user_active($HTTP_SESSION_VARS['user_id']))
{
return TRUE;
}
else
{
opendb_log("Invalid/Inactive 'public access' user encountered (user_id=".$CONFIG_VARS['site.public_access.user_id'].")");
return FALSE;
}
}
else if(is_not_empty_array($HTTP_SESSION_VARS) && isset($HTTP_SESSION_VARS['login_time']) && isset($HTTP_SESSION_VARS['last_access_time']) && isset($HTTP_SESSION_VARS['user_id']) && isset($HTTP_SESSION_VARS['hash_check']))
{
// A valid session as far as the variables go at least.
if($CONFIG_VARS['site.security_hash'] == $HTTP_SESSION_VARS['hash_check'])
{
// idle_timeout is how long between requests a login session
// can remain valid. If login_timeout is set, then this controls
// how long a session can remain active overall.
$current_time = time();
if (!is_numeric($CONFIG_VARS['site.login_timeout']) || (($current_time - $HTTP_SESSION_VARS['login_time']) < $CONFIG_VARS['site.login_timeout']) )
{
if ( !is_numeric($CONFIG_VARS['site.idle_timeout']) || (($current_time - $HTTP_SESSION_VARS['last_access_time']) < $CONFIG_VARS['site.idle_timeout']) )
{
if(is_user_active($HTTP_SESSION_VARS['user_id']))
{
// reset the time, as we are only interested in idle session tests.
$HTTP_SESSION_VARS['last_access_time'] = $current_time;
if(is_register_globals_enabled())
{
global $last_access_time;
session_register("last_access_time");
$last_access_time = $HTTP_SESSION_VARS['last_access_time'];
}
return TRUE;
}
else
{
opendb_log("Invalid/Inactive user encountered (user_id=".$HTTP_SESSION_VARS['user_id'].")");
return FALSE;
}
}
}
}
else
{
opendb_log("Invalid security-hash login invalidated (user_id=".$HTTP_SESSION_VARS['user_id'].")");
return FALSE;
}
}
}
//else
return FALSE;
}
?>
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