<?php
/*========================================================================*\
|| ###################################################################### ||
|| # vBulletin 5.4.1
|| # ------------------------------------------------------------------ # ||
|| # Copyright 2000-2018 vBulletin Solutions Inc. All Rights Reserved.  # ||
|| # This file may not be redistributed in whole or significant part.   # ||
|| # ----------------- VBULLETIN IS NOT FREE SOFTWARE ----------------- # ||
|| # http://www.vbulletin.com | http://www.vbulletin.com/license.html   # ||
|| ###################################################################### ||
\*========================================================================*/

if (!defined('VB_AREA') AND !defined('THIS_SCRIPT'))
{
	echo 'VB_AREA and THIS_SCRIPT must be defined to continue';
	exit;
}


// start the page generation timer
define('TIMESTART', microtime(true));

// set the current unix timestamp
define('TIMENOW', time());

// #############################################################################
// fetch the core includes

if (!class_exists('vB'))
{
	require_once(dirname(__FILE__) . '/../vb/vb.php');
}

vB::init();
if (isset($specialtemplates))
{
	vB::getDatastore()->preload($specialtemplates);
}

vB::setRequest(new vB_Request_Web());

require_once(CWD . '/includes/class_core.php');

// initialize the data registry
global $vbulletin;
$vbulletin = vB::get_registry();

$vb5_config =& vB::getConfig();
if ($vb5_config['Misc']['debug'])
{
	restore_error_handler();
}

$db = &$vbulletin->db;
require_once(DIR . '/includes/functions.php');

if (defined('DEMO_MODE') AND DEMO_MODE AND function_exists('vbulletin_demo_init_db'))
{
	vbulletin_demo_init_db();
}


// #############################################################################
// fetch options and other data from the datastore

if ($vbulletin->bf_ugp === null)
{
	echo '<div>vBulletin datastore error caused by one or more of the following:
		<ol>
			<li>You may have uploaded vBulletin files without also running the vBulletin upgrade script. If you have not run the upgrade script, do so now.</li>
			<li>The datastore cache may have been corrupted. Run <em>Rebuild Bitfields</em> from <em>tools.php</em>, which you can upload from the <em>do_not_upload</em> folder of the vBulletin package.</li>
		</ol>
	</div>';

	trigger_error('vBulletin datastore cache incomplete or corrupt', E_USER_ERROR);
}

if (defined('VB_PRODUCT') AND (!isset($vbulletin->products[VB_PRODUCT]) OR !($vbulletin->products[VB_PRODUCT])))
{
	exec_header_redirect(vB5_Route::buildUrl('home|fullurl'), 302);
}

if ($vbulletin->options['cookietimeout'] < 60)
{
	// values less than 60 will probably break things, so prevent that
	$vbulletin->options['cookietimeout'] = 60;
}

// #############################################################################
/**
* If shutdown functions are allowed, register exec_shut_down to be run on exit.
* Disable shutdown function for IIS CGI with Gzip enabled since it just doesn't work, sometimes, unless we kill the content-length header
* Also disable for PHP4 due to the echo() timeout issue
*/
define('SAPI_NAME', php_sapi_name());
if (!defined('NOSHUTDOWNFUNC'))
{
	define('NOSHUTDOWNFUNC', true);
}


// #############################################################################
// demo mode stuff
if (defined('DEMO_MODE') AND DEMO_MODE AND function_exists('vbulletin_demo_init_page'))
{
	vbulletin_demo_init_page();
}

// #############################################################################
// do a callback to modify any variables that might need modifying based on HTTP input
// eg: doing a conditional redirect based on a $goto value or $vbulletin->noheader must be set
if (function_exists('exec_postvar_call_back'))
{
	exec_postvar_call_back();
}

// #############################################################################
// initialize $show variable - used for template conditionals
$show = array();

// #############################################################################
// Clean Cookie Vars
$vbulletin->input->clean_array_gpc('c', array(
	'vbulletin_collapse'              => vB_Cleaner::TYPE_STR,
	COOKIE_PREFIX . 'referrerid'      => vB_Cleaner::TYPE_UINT,
	COOKIE_PREFIX . 'userid'          => vB_Cleaner::TYPE_UINT,
	COOKIE_PREFIX . 'password'        => vB_Cleaner::TYPE_STR,
	COOKIE_PREFIX . 'lastvisit'       => vB_Cleaner::TYPE_UINT,
	COOKIE_PREFIX . 'lastactivity'    => vB_Cleaner::TYPE_UINT,
	COOKIE_PREFIX . 'threadedmode'    => vB_Cleaner::TYPE_NOHTML,
	COOKIE_PREFIX . 'sessionhash'     => vB_Cleaner::TYPE_NOHTML,
	COOKIE_PREFIX . 'userstyleid'     => vB_Cleaner::TYPE_UINT,
	COOKIE_PREFIX . 'languageid'      => vB_Cleaner::TYPE_UINT,
	COOKIE_PREFIX . 'skipmobilestyle' => vB_Cleaner::TYPE_BOOL,
));

$vbulletin->input->clean_array_gpc('r', array(
	's'       => vB_Cleaner::TYPE_NOHTML,
	'styleid' => vB_Cleaner::TYPE_INT,
	'langid'  => vB_Cleaner::TYPE_INT,
));

// handle session input
if (!defined('VB_API') || !VB_API)
{
	$sessionhash = (!empty($vbulletin->GPC['s']) ? $vbulletin->GPC['s'] : $vbulletin->GPC[COOKIE_PREFIX . 'sessionhash']); // override cookie
}
else
{
	$sessionhash = '';
}

// Set up user's chosen language
if ($vbulletin->GPC['langid'] AND !empty($vbulletin->languagecache["{$vbulletin->GPC['langid']}"]['userselect']))
{
	$languageid =& $vbulletin->GPC['langid'];
	vbsetcookie('languageid', $languageid);
}
else if ($vbulletin->GPC[COOKIE_PREFIX . 'languageid'] AND !empty($vbulletin->languagecache[$vbulletin->GPC[COOKIE_PREFIX . 'languageid']]['userselect']))
{
	$languageid = $vbulletin->GPC[COOKIE_PREFIX . 'languageid'];
}
else
{
	$languageid = 0;
}

// Set up user's chosen style
if ($vbulletin->GPC['styleid'])
{
	$styleid = $vbulletin->GPC['styleid'];
	vbsetcookie('userstyleid', $styleid);
}
else
{
	$styleid = 0;
}

//we frequently, but not always have created the session by now (if we went through the front-end to get here)
//initializing the session is complicated, let's not do it twice if we don't need to.
$session = vB::getCurrentSession();
if (!$session)
{
	$session = vB_Session::getNewSession(vB::getDbAssertor(), vB::getDatastore(), vB::getConfig(), $sessionhash,
		$vbulletin->GPC[COOKIE_PREFIX . 'userid'], $vbulletin->GPC[COOKIE_PREFIX . 'password'], $styleid, $languageid);
	vB::setCurrentSession($session);
}

//needs to go after the session
$vbulletin->url = $vbulletin->input->fetch_url();
define('REFERRER_PASSTHRU', $vbulletin->url);

// conditional used in templates to hide things from search engines.
$show['search_engine'] = (preg_match("#(google|msnbot|yahoo! slurp)#si", $_SERVER['HTTP_USER_AGENT']));

$vbulletin->session->doLastVisitUpdate($vbulletin->GPC[COOKIE_PREFIX . 'lastvisit'], $vbulletin->GPC[COOKIE_PREFIX . 'lastactivity']);

// Because of Signature Verification, VB API won't need to verify securitytoken
// CSRF Protection for POST requests
if (strtoupper($_SERVER['REQUEST_METHOD']) == 'POST' AND !VB_API)
{

	if (empty($_POST) AND isset($_SERVER['CONTENT_LENGTH']) AND $_SERVER['CONTENT_LENGTH'] > 0)
	{
		die('The file(s) uploaded were too large to process.');
	}

	if ($vbulletin->userinfo['userid'] > 0 AND defined('CSRF_PROTECTION') AND CSRF_PROTECTION === true)
	{
		$vbulletin->input->clean_array_gpc('p', array(
			'securitytoken' => vB_Cleaner::TYPE_STR,
		));

		if (!in_array($_POST['do'], $vbulletin->csrf_skip_list))
		{
			if (!verify_security_token($vbulletin->GPC['securitytoken'], $vbulletin->userinfo['securitytoken_raw']))
			{
				switch ($vbulletin->GPC['securitytoken'])
				{
					case '':
						define('CSRF_ERROR', 'missing');
						break;
					case 'guest':
						define('CSRF_ERROR', 'guest');
						break;
					case 'timeout':
						define('CSRF_ERROR', 'timeout');
						break;
					default:
						define('CSRF_ERROR', 'invalid');
				}
			}
		}
	}
	else if (!defined('CSRF_PROTECTION') AND !defined('SKIP_REFERRER_CHECK'))
	{
		if (VB_HTTP_HOST AND $_SERVER['HTTP_REFERER'])
		{
			$host_parts = @vB_String::parseUrl($_SERVER['HTTP_HOST']);
			$http_host_port = isset($host_parts['port']) ? intval($host_parts['port']) : 0;
			$http_host = strtolower(VB_HTTP_HOST . ((!empty($http_host_port) AND $http_host_port != '80') ? ":$http_host_port" : ''));

			$referrer_parts = @vB_String::parseUrl($_SERVER['HTTP_REFERER']);
			$ref_port = isset($referrer_parts['port']) ? intval($referrer_parts['port']) : 0;
			$ref_host = strtolower($referrer_parts['host'] . ((!empty($ref_port) AND $ref_port != '80') ? ":$ref_port" : ''));

			if ($http_host == $ref_host)
			{	/* Instant match is good enough
				no need to check anything further. */
				$pass_ref_check = true;
			}
			else
			{
				$pass_ref_check = false;
				$allowed = array('.paypal.com');
				$allowed[] = '.'.preg_replace('#^www\.#i', '', $http_host);
				$whitelist = preg_split('#\s+#', $vbulletin->options['allowedreferrers'], -1, PREG_SPLIT_NO_EMPTY); // Get whitelist
				$allowed = array_unique(is_array($whitelist) ? array_merge($allowed,$whitelist) : $allowed); // Merge and de-duplicate.

				foreach ($allowed AS $host)
				{
					$host = strtolower($host);
					if (substr($host,0,1) == '.' AND
					(preg_match('#' . preg_quote($host, '#') . '$#siU', $ref_host) OR substr($host,1) == $ref_host))
					{
						$pass_ref_check = true;
						break;
					}
				}

				unset($allowed, $whitelist);
			}

			if ($pass_ref_check == false)
			{
				die('In order to accept POST requests originating from this domain, the admin must add the domain to the whitelist.');
			}
		}
	}
}


// Google Web Accelerator can display sensitive data ignoring any headers regarding caching
// it's a good thing for guests but not for anyone else
if ($vbulletin->userinfo['userid'] > 0 AND isset($_SERVER['HTTP_X_MOZ']) AND strpos($_SERVER['HTTP_X_MOZ'], 'prefetch') !== false)
{
	http_response_code(403);
	die('Prefetching is not allowed due to the various privacy issues that arise.');
}

// use the session-specified style if there is one
if (vB::getCurrentSession()->get('styleid') != 0)
{
	$vbulletin->userinfo['styleid'] = vB::getCurrentSession()->get('styleid');
}

if (isset($languageid))
{
	$vbulletin->userinfo['languageid'] = $languageid;
}

/*=========================================================================*\
|| #######################################################################
|| # NulleD By - vBSupport.org
|| # CVS: $RCSfile$ - $Revision: 95332 $
|| #######################################################################
\*=========================================================================*/
