<?php
/***************************************************************************
 *                                login.php
 *                            -------------------
 *   begin                : Saturday, Feb 13, 2001
 *   copyright            : (C) 2001 The phpBB Group
 *   email                : support@phpbb.com
 *
 *   $Id: login.php,v 1.4 2004/09/25 19:21:22 carls 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.
 *
 ***************************************************************************/
// Begin PNphpBB2 Module
if (!defined("LOADED_AS_MODULE")) {
	 die ("You can't access this file directly...");
}
$ModName = basename( dirname( __FILE__ ) );
// End PNphpBB2 Module

//
// Allow people to reach login page if
// board is shut down
//
define("IN_LOGIN", true);

define('IN_PHPBB', true);
// Begin PNphpBB2 Module
$phpbb_root_path = './modules/' . $ModName . '/';
// End PNphpBB2 Module
include($phpbb_root_path . 'extension.inc');
include($phpbb_root_path . 'common.'.$phpEx);

//
// Set page ID for session management
//
$userdata = session_pagestart($user_ip, PAGE_LOGIN);
init_userprefs($userdata);
//
// End session management
//

// session id check
if (!empty($HTTP_POST_VARS['sid']) || !empty($HTTP_GET_VARS['sid']))
{
	$sid = (!empty($HTTP_POST_VARS['sid'])) ? $HTTP_POST_VARS['sid'] : $HTTP_GET_VARS['sid'];
}
else
{
	$sid = '';
}

if( isset($HTTP_POST_VARS['login']) || isset($HTTP_GET_VARS['login']) || isset($HTTP_POST_VARS['logout']) || isset($HTTP_GET_VARS['logout']) )
{
// Begin PNphpBB2 Module
	if( ( isset($HTTP_POST_VARS['login']) || isset($HTTP_GET_VARS['login']) ) && !$userdata['session_logged_in'] )
// End PNphpBB2 Module
	{
// Begin PNphpBB2 Module
//		$username = isset($HTTP_POST_VARS['username']) ? trim(htmlspecialchars($HTTP_POST_VARS['username'])) : '';
//		$username = substr(str_replace("\\'", "'", $username), 0, 25);
//		$username = str_replace("'", "\\'", $username);
//		$password = isset($HTTP_POST_VARS['password']) ? $HTTP_POST_VARS['password'] : '';
    die("Login problem, code logic should not have brought you here!");
//		$sql = "SELECT user_id, username, user_password, user_active, user_level
//			FROM " . USERS_TABLE . "
//			WHERE username = '" . str_replace("\\'", "''", $username) . "'";
		$sql = "SELECT user_id, username, user_password, user_active, user_level
			FROM " . USERS_TABLE . "
			WHERE username = '" . pnVarPrepForStore($username) . "'";
			
		if ( !($result = $db->sql_query($sql)) )
		{
		 	 message_die(GENERAL_ERROR, 'Could not update users table', '', __LINE__, __FILE__, $sql);
		}
	
		if( $row = $db->sql_fetchrow($result) )
		{
			if( $row['user_level'] != ADMIN && $board_config['board_disable'] )
			{
				redirect(append_sid("index.$phpEx", true));
			}
			else
			{
// Begin PNphpBB2 Module
				if( $row['user_active'] )
// End PNphpBB2 Module
				{
					$autologin = ( isset($HTTP_POST_VARS['autologin']) ) ? TRUE : 0;

					$session_id = session_begin($row['user_id'], $user_ip, PAGE_INDEX, FALSE, $autologin);

					if( $session_id )
					{
// Begin PNphpBB2 Module
//            $url = ( !empty($HTTP_POST_VARS['redirect']) ) ? str_replace('&amp;', '&', htmlspecialchars($HTTP_POST_VARS['redirect'])) : "index.$phpEx"; 
//						redirect(append_sid($url, true));

							if (!empty($HTTP_POST_VARS['redirect']) || !empty($HTTP_GET_VARS['redirect']))
							{
							 	 $url = (!empty($HTTP_POST_VARS['redirect'])) ? htmlspecialchars($HTTP_POST_VARS['redirect']) : htmlspecialchars($HTTP_GET_VARS['redirect']);
								 redirect(append_sid($url, true));
							}
							else
							{
							 	 redirect(append_sid("index.$phpEx", true));
							}
// End PNphpBB2 Module
					}
					else
					{
						message_die(CRITICAL_ERROR, "Couldn't start session : login", "", __LINE__, __FILE__);
					}
				}
				else
				{
					$redirect = ( !empty($HTTP_POST_VARS['redirect']) ) ? str_replace('&amp;', '&', htmlspecialchars($HTTP_POST_VARS['redirect'])) : '';
// Begin PNphpBB2 Module (HTML 4.0.1)
 					$redirect = str_replace('?', '&amp;', $redirect);
// End PNphpBB2 Module (HTML 4.0.1)

					if (strstr(urldecode($redirect), "\n") || strstr(urldecode($redirect), "\r"))
					{
						message_die(GENERAL_ERROR, 'Tried to redirect to potentially insecure url.');
					}

					$template->assign_vars(array(
						'META' => "<meta http-equiv=\"refresh\" content=\"3;url=login.$phpEx?redirect=$redirect\">")
					);

					$message = $lang['Error_login'] . '<br /><br />' . sprintf($lang['Click_return_login'], "<a href=\"login.$phpEx?redirect=$redirect\">", '</a>') . '<br /><br />' .  sprintf($lang['Click_return_index'], '<a href="' . append_sid("index.$phpEx") . '">', '</a>');

					message_die(GENERAL_MESSAGE, $message);
				}
			}
		}
		else
		{
			$redirect = ( !empty($HTTP_POST_VARS['redirect']) ) ? str_replace('&amp;', '&', htmlspecialchars($HTTP_POST_VARS['redirect'])) : "";
// Begin PNphpBB2 Module (HTML 4.0.1)
			$redirect = str_replace('?', '&amp;', $redirect);
// End PNphpBB2 Module (HTML 4.0.1)

			if (strstr(urldecode($redirect), "\n") || strstr(urldecode($redirect), "\r"))
			{
				message_die(GENERAL_ERROR, 'Tried to redirect to potentially insecure url.');
			}

			$template->assign_vars(array(
				'META' => "<meta http-equiv=\"refresh\" content=\"3;url=login.$phpEx?redirect=$redirect\">")
			);

			$message = $lang['Error_login'] . '<br /><br />' . sprintf($lang['Click_return_login'], "<a href=\"login.$phpEx?redirect=$redirect\">", '</a>') . '<br /><br />' .  sprintf($lang['Click_return_index'], '<a href="' . append_sid("index.$phpEx") . '">', '</a>');

			message_die(GENERAL_MESSAGE, $message);
		}
	}
	else if( ( isset($HTTP_GET_VARS['logout']) || isset($HTTP_POST_VARS['logout']) ) && $userdata['session_logged_in'] )
	{
		if( $userdata['session_logged_in'] )
		{
			session_end($userdata['session_id'], $userdata['user_id']);
		}

		if (!empty($HTTP_POST_VARS['redirect']) || !empty($HTTP_GET_VARS['redirect']))
		{
			$url = (!empty($HTTP_POST_VARS['redirect'])) ? htmlspecialchars($HTTP_POST_VARS['redirect']) : htmlspecialchars($HTTP_GET_VARS['redirect']);
			$url = str_replace('&amp;', '&', $url);
			redirect(append_sid($url, true));
		}
		else
		{
			redirect(append_sid("index.$phpEx", true));
		}
	}
	else
	{
		$url = ( !empty($HTTP_POST_VARS['redirect']) ) ? str_replace('&amp;', '&', htmlspecialchars($HTTP_POST_VARS['redirect'])) : "index.$phpEx";
		redirect(append_sid($url, true));
	}
}
else
{
	//
	// Do a full login page dohickey if
	// user not already logged in
	//
	if( !$userdata['session_logged_in'] )
	{
		$page_title = $lang['Login'];
		include($phpbb_root_path . 'includes/page_header.'.$phpEx);
		
		$template->set_filenames(array(
			'body' => 'login_body.tpl')
		);

		if( isset($HTTP_POST_VARS['redirect']) || isset($HTTP_GET_VARS['redirect']) )
		{
			$forward_to = $HTTP_SERVER_VARS['QUERY_STRING'];
			
// Begin PNphpBB2 Module
			if( preg_match("/redirect=([a-z0-9\/\?&=\+\-_]+)/si", $forward_to, $forward_matches) )
// End PNphpBB2 Module
			{
			  $test = $forward_to;
				$forward_to = ( !empty($forward_matches[3]) ) ? $forward_matches[3] : $forward_matches[1];
				$forward_match = explode('&', $forward_to);

				if(count($forward_match) > 1)
				{
					$forward_page = '';

					for($i = 1; $i < count($forward_match); $i++)
					{
						if( !ereg("sid=", $forward_match[$i]) )
						{
							if( $forward_page != '' )
							{
// Begin PNphpBB2 Module
								$forward_page .= '?';
// End PNphpBB2 Module
							}
							$forward_page .= $forward_match[$i];
						}
					}
					$forward_page = $forward_match[0] . '?' . $forward_page;
				}
				else
				{
					$forward_page = $forward_match[0];
				}
			}
		}
		else
		{
// Begin PNphpBB2 Module
			$forward_page = 'index';
// End PNphpBB2 Module
		}
		$username = ( $userdata['user_id'] != ANONYMOUS ) ? $userdata['username'] : '';

// Begin PNphpBB2 Module
//		$s_hidden_fields = '<input type="hidden" name="redirect" value="' . $forward_page . '" />';
//	 	$s_hidden_fields = '<input type="hidden" name="url" value="' . append_sid('login&login=login&sid=' . $userdata['session_id'] . '&redirect=' . $forward_page) . '">';
	 	$s_hidden_fields = '<input type="hidden" name="url" value="' . append_sid($forward_page) . '">';
		$s_hidden_fields .= '<input type="hidden" name="module" value="NS-User">';
		$s_hidden_fields .= '<input type="hidden" name="op" value="login">';
// End PNphpBB2 Module

		make_jumpbox('viewforum.'.$phpEx, $forum_id);
		$template->assign_vars(array(
/* Begin PNphpBB2 Module */
			'USERNAME' => pnVarPrepForDisplay($username),
/* End PNphpBB2 Module */

			'L_ENTER_PASSWORD' => $lang['Enter_password'],
			'L_SEND_PASSWORD' => $lang['Forgotten_password'],
			
/* Begin PNphpBB2 Module */
	 		'S_LOGIN_ACTION' => "user.$phpEx",
			'U_SEND_PASSWORD' => "user.$phpEx?op=lostpassscreen&amp;module=NS-LostPassword",
/*			'U_SEND_PASSWORD' => append_sid("profile.$phpEx?mode=sendpassword"), */
/* End PNphpBB2 Module */

			'S_HIDDEN_FIELDS' => $s_hidden_fields)
		);

		$template->pparse('body');

		include($phpbb_root_path . 'includes/page_tail.'.$phpEx);
	}
	else
	{
		redirect(append_sid("index.$phpEx", true));
	}

}

?>
