<?php
/***************************************************************
*  Copyright notice
*
*  (c) 1999-2011 Kasper Skårhøj (kasperYYYY@typo3.com)
*  All rights reserved
*
*  This script is part of the TYPO3 project. The TYPO3 project 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.
*
*  The GNU General Public License can be found at
*  http://www.gnu.org/copyleft/gpl.html.
*  A copy is found in the textfile GPL.txt and important notices to the license
*  from the author is found in LICENSE.txt distributed with these scripts.
*
*
*  This script 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.
*
*  This copyright notice MUST APPEAR in all copies of the script!
***************************************************************/
/**
 * Login-screen of TYPO3.
 *
 * Revised for TYPO3 3.6 December/2003 by Kasper Skårhøj
 * XHTML compliant
 *
 * @author	Kasper Skårhøj <kasperYYYY@typo3.com>
 */


define('TYPO3_PROCEED_IF_NO_USER', 1);
require('init.php');
require('template.php');















/**
 * Script Class for rendering the login form
 *
 * @author	Kasper Skårhøj <kasperYYYY@typo3.com>
 * @package TYPO3
 * @subpackage core
 */
class SC_index {

		// Internal, GPvars:
	var $redirect_url;			// GPvar: redirect_url; The URL to redirect to after login.
	var $GPinterface;			// GPvar: Defines which interface to load (from interface selector)
	var $u;					// GPvar: preset username
	var $p;					// GPvar: preset password
	var $L;					// GPvar: If "L" is "OUT", then any logged in used is logged out. If redirect_url is given, we redirect to it
	var $loginRefresh;			// Login-refresh boolean; The backend will call this script with this value set when the login is close to being expired and the form needs to be redrawn.
	var $commandLI;				// Value of forms submit button for login.

		// Internal, static:
	var $redirectToURL;			// Set to the redirect URL of the form (may be redirect_url or "backend.php")

		// Internal, dynamic:
	var $content;				// Content accumulation

	var $interfaceSelector;			// A selector box for selecting value for "interface" may be rendered into this variable
	var $interfaceSelector_jump;	// A selector box for selecting value for "interface" may be rendered into this variable - this will have an onchange action which will redirect the user to the selected interface right away
	var $interfaceSelector_hidden;	// A hidden field, if the interface is not set.
	var $addFields_hidden = '';		// Additional hidden fields to be placed at the login form

		// sets the level of security. *'normal' = clear-text. 'challenged' = hashed password/username from form in $formfield_uident. 'superchallenged' = hashed password hashed again with username.
	var $loginSecurityLevel = 'superchallenged';




	/**
	 * Initialize the login box. Will also react on a &L=OUT flag and exit.
	 *
	 * @return	void
	 */
	function init()	{
			// We need a PHP session session for most login levels
		session_start();

		$this->redirect_url = t3lib_div::sanitizeLocalUrl(t3lib_div::_GP('redirect_url'));
		$this->GPinterface = t3lib_div::_GP('interface');

			// Grabbing preset username and password, for security reasons this feature only works if SSL is used
		if (t3lib_div::getIndpEnv('TYPO3_SSL')) {
			$this->u = t3lib_div::_GP('u');
			$this->p = t3lib_div::_GP('p');
		}

			// If "L" is "OUT", then any logged in is logged out. If redirect_url is given, we redirect to it
		$this->L = t3lib_div::_GP('L');

			// Login
		$this->loginRefresh = t3lib_div::_GP('loginRefresh');

			// Value of "Login" button. If set, the login button was pressed.
		$this->commandLI = t3lib_div::_GP('commandLI');

			// sets the level of security from conf vars
		if ($GLOBALS['TYPO3_CONF_VARS']['BE']['loginSecurityLevel']) {
			$this->loginSecurityLevel = $GLOBALS['TYPO3_CONF_VARS']['BE']['loginSecurityLevel'];
		}

			// try to get the preferred browser language
		$preferredBrowserLanguage = $GLOBALS['LANG']->csConvObj->getPreferredClientLanguage(t3lib_div::getIndpEnv('HTTP_ACCEPT_LANGUAGE'));
			// if we found a $preferredBrowserLanguage and it is not the default language and no be_user is logged in
			// initialize $GLOBALS['LANG'] again with $preferredBrowserLanguage
		if ($preferredBrowserLanguage != 'default' && !$GLOBALS['BE_USER']->user['uid']) {
			$GLOBALS['LANG']->init($preferredBrowserLanguage);
		}
		$GLOBALS['LANG']->includeLLFile('EXT:lang/locallang_login.xml');

			// check if labels from $GLOBALS['TYPO3_CONF_VARS']['BE']['loginLabels'] were changed,
			// and merge them to $GLOBALS['LOCAL_LANG'] if needed
		$this->mergeOldLoginLabels();

			// Setting the redirect URL to "backend.php" if no alternative input is given
		$this->redirectToURL = ($this->redirect_url ? $this->redirect_url : 'backend.php');


			// Do a logout if the command is set
		if ($this->L == 'OUT' && is_object($GLOBALS['BE_USER'])) {
			$GLOBALS['BE_USER']->logoff();
			if ($this->redirect_url) {
				t3lib_utility_Http::redirect($this->redirect_url);
			}
			exit;
		}
	}


	/**
	 * Main function - creating the login/logout form
	 *
	 * @return	void
	 */
	function main()	{
			// Initialize template object:
		$GLOBALS['TBE_TEMPLATE']->bodyTagAdditions = ' onload="startUp();"';
		$GLOBALS['TBE_TEMPLATE']->moduleTemplate = $GLOBALS['TBE_TEMPLATE']->getHtmlTemplate('templates/login.html');

		$GLOBALS['TBE_TEMPLATE']->getPageRenderer()->loadExtJS();
		$GLOBALS['TBE_TEMPLATE']->getPageRenderer()->loadPrototype();
		$GLOBALS['TBE_TEMPLATE']->getPageRenderer()->loadScriptaculous();

			// Set JavaScript for creating a MD5 hash of the password:
		$GLOBALS['TBE_TEMPLATE']->JScode.= $this->getJScode();

			// Checking, if we should make a redirect.
			// Might set JavaScript in the header to close window.
		$this->checkRedirect();

			// Initialize interface selectors:
		$this->makeInterfaceSelectorBox();

			// Creating form based on whether there is a login or not:
		if (!$GLOBALS['BE_USER']->user['uid']) {
			$GLOBALS['TBE_TEMPLATE']->form = $this->startForm();
			$loginForm = $this->makeLoginForm();
		} else {
			$GLOBALS['TBE_TEMPLATE']->form = '
				<form action="index.php" method="post" name="loginform">
				<input type="hidden" name="login_status" value="logout" />
				';
			$loginForm = $this->makeLogoutForm();
		}

			// Starting page:
		$this->content .= $GLOBALS['TBE_TEMPLATE']->startPage('TYPO3 Login: ' . $GLOBALS['TYPO3_CONF_VARS']['SYS']['sitename'], FALSE);

			// Add login form:
		$this->content.=$this->wrapLoginForm($loginForm);

		$this->content.= $GLOBALS['TBE_TEMPLATE']->endPage();
	}

	/**
	 * Outputting the accumulated content to screen
	 *
	 * @return	void
	 */
	function printContent()	{
		echo $this->content;
	}

	/*****************************
	 *
	 * Various functions
	 *
	 ******************************/

	/**
	 * Creates the login form
	 * This is drawn when NO login exists.
	 *
	 * @return	string		HTML output
	 */
	function makeLoginForm()	{
		$content = t3lib_parsehtml::getSubpart($GLOBALS['TBE_TEMPLATE']->moduleTemplate, '###LOGIN_FORM###');
		$markers = array(
			'VALUE_USERNAME' => htmlspecialchars($this->u),
			'VALUE_PASSWORD' => htmlspecialchars($this->p),
			'VALUE_SUBMIT'   => $GLOBALS['LANG']->getLL('labels.submitLogin', TRUE),
		);

			// show an error message if the login command was successful already, otherwise remove the subpart
		if (!$this->isLoginInProgress()) {
			$content = t3lib_parsehtml::substituteSubpart($content, '###LOGIN_ERROR###', '');
		} else {
			$markers['ERROR_MESSAGE'] = $GLOBALS['LANG']->getLL('error.login', TRUE);
			$markers['ERROR_LOGIN_TITLE'] = $GLOBALS['LANG']->getLL('error.login.title', TRUE);
			$markers['ERROR_LOGIN_DESCRIPTION'] = $GLOBALS['LANG']->getLL('error.login.description', TRUE);
		}


			// remove the interface selector markers if it's not available
		if (!($this->interfaceSelector && !$this->loginRefresh)) {
			$content = t3lib_parsehtml::substituteSubpart($content, '###INTERFACE_SELECTOR###', '');
		} else {
			$markers['LABEL_INTERFACE'] = $GLOBALS['LANG']->getLL('labels.interface', TRUE);
			$markers['VALUE_INTERFACE'] = $this->interfaceSelector;
		}

		return t3lib_parsehtml::substituteMarkerArray($content, $markers, '###|###');
	}


	/**
	 * Creates the logout form
	 * This is drawn if a user login already exists.
	 *
	 * @return	string		HTML output
	 */
	function makeLogoutForm() {
		$content = t3lib_parsehtml::getSubpart($GLOBALS['TBE_TEMPLATE']->moduleTemplate, '###LOGOUT_FORM###');
		$markers = array(
			'LABEL_USERNAME' => $GLOBALS['LANG']->getLL('labels.username', TRUE),
			'VALUE_USERNAME' => htmlspecialchars($GLOBALS['BE_USER']->user['username']),
			'VALUE_SUBMIT'   => $GLOBALS['LANG']->getLL('labels.submitLogout', TRUE),
		);

			// remove the interface selector markers if it's not available
		if (!$this->interfaceSelector_jump) {
			$content = t3lib_parsehtml::substituteSubpart($content, '###INTERFACE_SELECTOR###', '');
		} else {
			$markers['LABEL_INTERFACE'] = $GLOBALS['LANG']->getLL('labels.interface', TRUE);
			$markers['VALUE_INTERFACE'] = $this->interfaceSelector_jump;
		}

		return t3lib_parsehtml::substituteMarkerArray($content, $markers, '###|###');
	}


	/**
	 * Wrapping the login form table in another set of tables etc:
	 *
	 * @param	string		HTML content for the login form
	 * @return	string		The HTML for the page.
	 */
	function wrapLoginForm($content) {
		$mainContent = t3lib_parsehtml::getSubpart($GLOBALS['TBE_TEMPLATE']->moduleTemplate, '###PAGE###');

		if ($GLOBALS['TBE_STYLES']['logo_login']) {
			$logo = '<img src="'.htmlspecialchars($GLOBALS['BACK_PATH'] . $GLOBALS['TBE_STYLES']['logo_login']) . '" alt="" />';
		} else {
			$logo = '<img'.t3lib_iconWorks::skinImg($GLOBALS['BACK_PATH'],'gfx/typo3logo.gif','width="123" height="34"').' alt="" />';
		}

		$browserWarning = t3lib_div::makeInstance(
			't3lib_FlashMessage',
				// TODO: refactor if other old browsers are not supported anymore
			$GLOBALS['LANG']->getLL('warning.incompatibleBrowser') . ' ' . $GLOBALS['LANG']->getLL('warning.incompatibleBrowserInternetExplorer'),
			$GLOBALS['LANG']->getLL('warning.incompatibleBrowserHeadline'),
			t3lib_FlashMessage::ERROR
		);
		$browserWarning = $browserWarning->render();

		$markers = array(
			'LOGO'             => $logo,
			'LOGINBOX_IMAGE'   => $this->makeLoginBoxImage(),
			'FORM'             => $content,
			'NEWS'             => $this->makeLoginNews(),
			'COPYRIGHT'        => $this->makeCopyrightNotice(),
			'CSS_ERRORCLASS'   => ($this->isLoginInProgress() ? ' class="error"' : ''),
			'CSS_OPENIDCLASS'  => 't3-login-openid-' . (t3lib_extMgm::isLoaded('openid') ? 'enabled' : 'disabled'),

				// the labels will be replaced later on, thus the other parts above
				// can use these markers as well and it will be replaced
			'HEADLINE'         => $GLOBALS['LANG']->getLL('headline', TRUE),
			'INFO_ABOUT'       => $GLOBALS['LANG']->getLL('info.about', TRUE),
			'INFO_RELOAD'      => $GLOBALS['LANG']->getLL('info.reset', TRUE),
			'INFO'             => $GLOBALS['LANG']->getLL('info.cookies_and_js', TRUE),
			'WARNING_BROWSER_INCOMPATIBLE'  => $browserWarning,
			'ERROR_JAVASCRIPT' => $GLOBALS['LANG']->getLL('error.javascript', TRUE),
			'ERROR_COOKIES'    => $GLOBALS['LANG']->getLL('error.cookies', TRUE),
			'ERROR_COOKIES_IGNORE' => $GLOBALS['LANG']->getLL('error.cookies_ignore', TRUE),
			'ERROR_CAPSLOCK'   => $GLOBALS['LANG']->getLL('error.capslock', TRUE),
			'ERROR_FURTHERHELP' => $GLOBALS['LANG']->getLL('error.furtherInformation', TRUE),
			'LABEL_DONATELINK' => $GLOBALS['LANG']->getLL('labels.donate', TRUE),
			'LABEL_USERNAME'   => $GLOBALS['LANG']->getLL('labels.username', TRUE),
			'LABEL_OPENID'     => $GLOBALS['LANG']->getLL('labels.openId', TRUE),
			'LABEL_PASSWORD'   => $GLOBALS['LANG']->getLL('labels.password', TRUE),
			'LABEL_WHATISOPENID' => $GLOBALS['LANG']->getLL('labels.whatIsOpenId', TRUE),
			'LABEL_SWITCHOPENID' => $GLOBALS['LANG']->getLL('labels.switchToOpenId', TRUE),
			'LABEL_SWITCHDEFAULT' => $GLOBALS['LANG']->getLL('labels.switchToDefault', TRUE),
			'CLEAR'            => $GLOBALS['LANG']->getLL('clear', TRUE),
			'LOGIN_PROCESS'    => $GLOBALS['LANG']->getLL('login_process', TRUE),
			'SITELINK'         => '<a href="/">###SITENAME###</a>',

				// global variables will now be replaced (at last)
			'SITENAME'         => htmlspecialchars($GLOBALS['TYPO3_CONF_VARS']['SYS']['sitename'])
		);
		return t3lib_parsehtml::substituteMarkerArray($mainContent, $markers, '###|###');
	}


	/**
	 * Checking, if we should perform some sort of redirection OR closing of windows.
	 *
	 * @return	void
	 */
	function checkRedirect()	{
			// Do redirect:
			// If a user is logged in AND a) if either the login is just done (isLoginInProgress) or b) a loginRefresh is done or c) the interface-selector is NOT enabled (If it is on the other hand, it should not just load an interface, because people has to choose then...)
		if ($GLOBALS['BE_USER']->user['uid'] && ($this->isLoginInProgress() || $this->loginRefresh || !$this->interfaceSelector))	{

				// If no cookie has been set previously we tell people that this is a problem. This assumes that a cookie-setting script (like this one) has been hit at least once prior to this instance.
			if (!$_COOKIE[t3lib_beUserAuth::getCookieName()]) {
				if ($this->commandLI=='setCookie') {
						// we tried it a second time but still no cookie
						// 26/4 2005: This does not work anymore, because the saving of challenge values in $_SESSION means the system will act as if the password was wrong.
					throw new RuntimeException('Login-error: Yeah, that\'s a classic. No cookies, no TYPO3.<br /><br />Please accept cookies from TYPO3 - otherwise you\'ll not be able to use the system.', 1294586846);
				} else {
						// try it once again - that might be needed for auto login
					$this->redirectToURL = 'index.php?commandLI=setCookie';
				}
			}

			if (($redirectToURL = (string)$GLOBALS['BE_USER']->getTSConfigVal('auth.BE.redirectToURL'))) {
				$this->redirectToURL = $redirectToURL;
				$this->GPinterface = '';
			}

				// store interface
			$GLOBALS['BE_USER']->uc['interfaceSetup'] = $this->GPinterface;
			$GLOBALS['BE_USER']->writeUC();

				// Based on specific setting of interface we set the redirect script:
			switch ($this->GPinterface)	{
				case 'backend':
				case 'backend_old':
					$this->redirectToURL = 'backend.php';
				break;
				case 'frontend':
					$this->redirectToURL = '../';
				break;
			}

			$formProtection = t3lib_formprotection_Factory::get();
				// If there is a redirect URL AND if loginRefresh is not set...
			if (!$this->loginRefresh)	{
				$formProtection->storeSessionTokenInRegistry();
				t3lib_utility_Http::redirect($this->redirectToURL);
			} else {
				$formProtection->setSessionTokenFromRegistry();
				$formProtection->persistSessionToken();
				$GLOBALS['TBE_TEMPLATE']->JScode.=$GLOBALS['TBE_TEMPLATE']->wrapScriptTags('
					if (parent.opener && (parent.opener.busy || parent.opener.TYPO3.loginRefresh)) {
						if (parent.opener.TYPO3.loginRefresh) {
							parent.opener.TYPO3.loginRefresh.startTimer();
						} else {
							parent.opener.busy.loginRefreshed();
						}
						parent.close();
					}
				');
			}
		} elseif (!$GLOBALS['BE_USER']->user['uid'] && $this->isLoginInProgress()) {
			sleep(5);	// Wrong password, wait for 5 seconds
		}
	}

	/**
	 * Making interface selector:
	 *
	 * @return	void
	 */
	function makeInterfaceSelectorBox()	{
			// Reset variables:
		$this->interfaceSelector = '';
		$this->interfaceSelector_hidden='';
		$this->interfaceSelector_jump = '';

			// If interfaces are defined AND no input redirect URL in GET vars:
		if ($GLOBALS['TYPO3_CONF_VARS']['BE']['interfaces'] && ($this->isLoginInProgress() || !$this->redirect_url))	{
			$parts = t3lib_div::trimExplode(',',$GLOBALS['TYPO3_CONF_VARS']['BE']['interfaces']);
			if (count($parts)>1)	{	// Only if more than one interface is defined will we show the selector:

					// Initialize:
				$labels=array();

				$labels['backend']     = $GLOBALS['LANG']->getLL('interface.backend');
				$labels['backend_old'] = $GLOBALS['LANG']->getLL('interface.backend_old');
				$labels['frontend']    = $GLOBALS['LANG']->getLL('interface.frontend');

				$jumpScript=array();
				$jumpScript['backend']     = 'backend.php';
				$jumpScript['backend_old'] = 'backend.php';
				$jumpScript['frontend']    = '../';

					// Traverse the interface keys:
				foreach($parts as $valueStr)	{
					$this->interfaceSelector.='
							<option value="'.htmlspecialchars($valueStr).'"'.(t3lib_div::_GP('interface')==htmlspecialchars($valueStr) ? ' selected="selected"' : '').'>'.htmlspecialchars($labels[$valueStr]).'</option>';
					$this->interfaceSelector_jump.='
							<option value="'.htmlspecialchars($jumpScript[$valueStr]).'">'.htmlspecialchars($labels[$valueStr]).'</option>';
				}
				$this->interfaceSelector='
						<select id="t3-interfaceselector" name="interface" class="c-interfaceselector" tabindex="3">'.$this->interfaceSelector.'
						</select>';
				$this->interfaceSelector_jump='
						<select id="t3-interfaceselector" name="interface" class="c-interfaceselector" tabindex="3" onchange="window.location.href=this.options[this.selectedIndex].value;">'.$this->interfaceSelector_jump.'
						</select>';

			} elseif (!$this->redirect_url) {
					// If there is only ONE interface value set and no redirect_url is present:
				$this->interfaceSelector_hidden='<input type="hidden" name="interface" value="'.trim($GLOBALS['TYPO3_CONF_VARS']['BE']['interfaces']).'" />';
			}
		}
	}

	/**
	 * COPYRIGHT notice
	 *
	 * Warning:
	 * DO NOT prevent this notice from being shown in ANY WAY.
	 * According to the GPL license an interactive application must show such a notice on start-up ('If the program is interactive, make it output a short notice... ' - see GPL.txt)
	 * Therefore preventing this notice from being properly shown is a violation of the license, regardless of whether you remove it or use a stylesheet to obstruct the display.
	 *
	 * @return	string		Text/Image (HTML) for copyright notice.
	 */
	function makeCopyrightNotice()	{

			// Get values from TYPO3_CONF_VARS:
		$loginCopyrightWarrantyProvider = strip_tags(trim($GLOBALS['TYPO3_CONF_VARS']['SYS']['loginCopyrightWarrantyProvider']));
		$loginCopyrightWarrantyURL = strip_tags(trim($GLOBALS['TYPO3_CONF_VARS']['SYS']['loginCopyrightWarrantyURL']));
		$loginImageSmall = (trim($GLOBALS['TBE_STYLES']['loginBoxImageSmall'])) ? trim($GLOBALS['TBE_STYLES']['loginBoxImageSmall']) : 'gfx/loginlogo_transp.gif';

			// Make warranty note:
		if (strlen($loginCopyrightWarrantyProvider)>=2 && strlen($loginCopyrightWarrantyURL)>=10)	{
			$warrantyNote = sprintf($GLOBALS['LANG']->getLL('warranty.by'), htmlspecialchars($loginCopyrightWarrantyProvider), '<a href="' . htmlspecialchars($loginCopyrightWarrantyURL) . '" target="_blank">', '</a>');
		} else {
			$warrantyNote = sprintf($GLOBALS['LANG']->getLL('no.warranty'), '<a href="' . TYPO3_URL_LICENSE . '" target="_blank">', '</a>');
		}

			// Compile full copyright notice:
		$copyrightNotice = '<a href="' . TYPO3_URL_GENERAL . '" target="_blank">'.
					'<img src="' . $loginImageSmall . '" alt="' . $GLOBALS['LANG']->getLL('typo3.logo') . '" align="left" />' .
					$GLOBALS['LANG']->getLL('typo3.cms') . ($GLOBALS['TYPO3_CONF_VARS']['SYS']['loginCopyrightShowVersion']?' ' . $GLOBALS['LANG']->getLL('version.short') . ' ' . htmlspecialchars($GLOBALS['TYPO_VERSION']):'') .
					'</a>. ' .
					$GLOBALS['LANG']->getLL('copyright') . ' &copy; ' . TYPO3_copyright_year . ' Kasper Sk&#229;rh&#248;j. ' . $GLOBALS['LANG']->getLL('extension.copyright') . ' ' .
					sprintf($GLOBALS['LANG']->getLL('details.link'), '<a href="' . TYPO3_URL_GENERAL . '" target="_blank">' . TYPO3_URL_GENERAL . '</a>') . '<br /> ' .
					$warrantyNote . ' ' .
					sprintf($GLOBALS['LANG']->getLL('free.software'), '<a href="' . TYPO3_URL_LICENSE . '" target="_blank">', '</a> ') .
					$GLOBALS['LANG']->getLL('keep.notice');

			// Return notice:
		return $copyrightNotice;
	}

	/**
	 * Returns the login box image, whether the default or an image from the rotation folder.
	 *
	 * @return	string		HTML image tag.
	 */
	function makeLoginBoxImage()	{
		$loginboxImage = '';
		if ($GLOBALS['TBE_STYLES']['loginBoxImage_rotationFolder'])	{		// Look for rotation image folder:
			$absPath = t3lib_div::resolveBackPath(PATH_typo3.$GLOBALS['TBE_STYLES']['loginBoxImage_rotationFolder']);

				// Get rotation folder:
			$dir = t3lib_div::getFileAbsFileName($absPath);
			if ($dir && @is_dir($dir))	{

					// Get files for rotation into array:
				$files = t3lib_div::getFilesInDir($dir,'png,jpg,gif');

					// Pick random file:
				$randImg = array_rand($files, 1);

					// Get size of random file:
				$imgSize = @getimagesize($dir.$files[$randImg]);

				$imgAuthor = is_array($GLOBALS['TBE_STYLES']['loginBoxImage_author'])&&$GLOBALS['TBE_STYLES']['loginBoxImage_author'][$files[$randImg]] ? htmlspecialchars($GLOBALS['TBE_STYLES']['loginBoxImage_author'][$files[$randImg]]) : '';

					// Create image tag:
				if (is_array($imgSize))	{
					$loginboxImage = '<img src="'.htmlspecialchars($GLOBALS['TBE_STYLES']['loginBoxImage_rotationFolder'].$files[$randImg]).'" '.$imgSize[3].' id="loginbox-image" alt="'.$imgAuthor.'" title="'.$imgAuthor.'" />';
				}
			}
		} else {	// If no rotation folder configured, print default image:

			if (strstr(TYPO3_version,'-dev'))	{	// development version
				$loginImage = 'loginbox_image_dev.png';
				$imagecopy = 'You are running a development version of TYPO3 '.TYPO3_branch;
			} else {
				$loginImage = 'loginbox_image.jpg';
				$imagecopy = 'Photo by J.C. Franca (www.digitalphoto.com.br)';
			}
			$loginboxImage = '<img'.t3lib_iconWorks::skinImg($GLOBALS['BACK_PATH'],'gfx/'.$loginImage,'width="200" height="133"').' id="loginbox-image" alt="'.$imagecopy.'" title="'.$imagecopy.'" />';
		}

			// Return image tag:
		return $loginboxImage;
	}

	/**
	 * Make login news - renders the HTML content for a list of news shown under
	 * the login form. News data is added through $GLOBALS['TYPO3_CONF_VARS']
	 *
	 * @return	string		HTML content
	 * @credits			Idea by Jan-Hendrik Heuing
	 * @deprecated $GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews'] is deprecated since 4.5. Use system news records instead.
	 */
	function makeLoginNews() {
		$newsContent = '';

		$systemNews = $this->getSystemNews();
		if (count($GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews'])) {
			t3lib_div::logDeprecatedFunction();

			$GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews'] = array_merge(
				$systemNews,
				$GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews']
			);
		} else {
			$GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews'] = $systemNews;
		}

			// Traverse news array IF there are records in it:
		if (is_array($GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews']) && count($GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews']) && !t3lib_div::_GP('loginRefresh')) {
			$htmlParser = t3lib_div::makeInstance('t3lib_parsehtml_proc');
				// get the main news template, and replace the subpart after looped through
			$newsContent      = t3lib_parsehtml::getSubpart($GLOBALS['TBE_TEMPLATE']->moduleTemplate, '###LOGIN_NEWS###');
			$newsItemTemplate = t3lib_parsehtml::getSubpart($newsContent, '###NEWS_ITEM###');

			$newsItem = '';
			$count = 1;
			foreach ($GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews'] as $newsItemData) {
				$additionalClass = '';
				if ($count == 1) {
					$additionalClass = ' first-item';
				} elseif($count == count($GLOBALS['TYPO3_CONF_VARS']['BE']['loginNews'])) {
					$additionalClass = ' last-item';
				}

				$newsItemContent = $htmlParser->TS_transform_rte($htmlParser->TS_links_rte($newsItemData['content']));
				$newsItemMarker = array(
					'###HEADER###'  => htmlspecialchars($newsItemData['header']),
					'###DATE###'    => htmlspecialchars($newsItemData['date']),
					'###CONTENT###' => $newsItemContent,
					'###CLASS###'   => $additionalClass
				);

				$count++;
				$newsItem .= t3lib_parsehtml::substituteMarkerArray($newsItemTemplate, $newsItemMarker);
			}

			$title = ($GLOBALS['TYPO3_CONF_VARS']['BE']['loginNewsTitle'] ? $GLOBALS['TYPO3_CONF_VARS']['BE']['loginNewsTitle'] : $GLOBALS['LANG']->getLL('newsheadline'));

			$newsContent = t3lib_parsehtml::substituteMarker($newsContent,  '###NEWS_HEADLINE###', htmlspecialchars($title));
			$newsContent = t3lib_parsehtml::substituteSubpart($newsContent, '###NEWS_ITEM###', $newsItem);
		}

		return $newsContent;
	}

	/**
	 * Gets news from sys_news and converts them into a format suitable for
	 * showing them at the login screen.
	 *
	 * @return	array	An array of login news.
	 */
	protected function getSystemNews() {
		$systemNewsTable = 'sys_news';
		$systemNews      = array();

		$systemNewsRecords = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows(
			'title, content, crdate',
			$systemNewsTable,
			'1=1' .
				t3lib_BEfunc::BEenableFields($systemNewsTable) .
				t3lib_BEfunc::deleteClause($systemNewsTable),
			'',
			'crdate DESC'
		);

		foreach ($systemNewsRecords as $systemNewsRecord) {
			$systemNews[] = array(
				'date'    => date(
					$GLOBALS['TYPO3_CONF_VARS']['SYS']['ddmmyy'],
					$systemNewsRecord['crdate']
				),
				'header'  => $systemNewsRecord['title'],
				'content' => $systemNewsRecord['content']
			);
		}

		return $systemNews;
	}

	/**
	 * Returns the form tag
	 *
	 * @return	string		Opening form tag string
	 */
	function startForm()	{
		$output = '';

		// The form defaults to 'no login'. This prevents plain
		// text logins to the Backend. The 'sv' extension changes the form to
		// use superchallenged method and rsaauth extension makes rsa authetication.
		$form = '<form action="index.php" method="post" name="loginform" ' .
				'onsubmit="alert(\'No authentication methods available. Please, ' .
				'contact your TYPO3 administrator.\');return false">';

		// Call hooks. If they do not return anything, we fail to login
		if (is_array($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/index.php']['loginFormHook'])) {
			foreach ($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/index.php']['loginFormHook'] as $function) {
				$params = array();
				$formCode = t3lib_div::callUserFunction($function, $params, $this);
				if ($formCode) {
					$form = $formCode;
					break;
				}
			}
		}

		$output .= $form .
			'<input type="hidden" name="login_status" value="login" />' .
			'<input type="hidden" name="userident" value="" />' .
			'<input type="hidden" name="redirect_url" value="'.htmlspecialchars($this->redirectToURL).'" />' .
			'<input type="hidden" name="loginRefresh" value="'.htmlspecialchars($this->loginRefresh).'" />' .
			$this->interfaceSelector_hidden . $this->addFields_hidden;

		return $output;
	}

	/**
	 * Creates JavaScript for the login form
	 *
	 * @return	string		JavaScript code
	 */
	function getJScode()	{
		$JSCode = '';
		if (is_array($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/index.php']['loginScriptHook'])) {
			foreach ($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['typo3/index.php']['loginScriptHook'] as $function) {
				$params = array();
				$JSCode = t3lib_div::callUserFunction($function, $params, $this);
				if ($JSCode) {
					break;
				}
			}
		}
		$JSCode .= $GLOBALS['TBE_TEMPLATE']->wrapScriptTags('
			function startUp() {
					// If the login screen is shown in the login_frameset window for re-login, then try to get the username of the current/former login from opening windows main frame:
				try {
					if (parent.opener && parent.opener.TS && parent.opener.TS.username && document.loginform && document.loginform.username)	{
						document.loginform.username.value = parent.opener.TS.username;
					}
				}
				catch(error) {
					//continue
				}

					// Wait a few millisecons before calling checkFocus(). This might be necessary because some browsers need some time to auto-fill in the form fields
				window.setTimeout("checkFocus()", 50);
			}

				// This moves focus to the right input field:
			function checkFocus() {
					// If for some reason there already is a username in the username form field, move focus to the password field:
				if (document.loginform.username && document.loginform.username.value == "") {
					document.loginform.username.focus();
				} else if (document.loginform.p_field && document.loginform.p_field.type!="hidden") {
					document.loginform.p_field.focus();
				}
			}

				// This function shows a warning, if user has capslock enabled
				// parameter showWarning: shows warning if TRUE and capslock active, otherwise only hides warning, if capslock gets inactive
			function checkCapslock(e, showWarning) {
				if (!isCapslock(e)) {
					document.getElementById(\'t3-capslock\').style.display = \'none\';
				} else if (showWarning) {
					document.getElementById(\'t3-capslock\').style.display = \'block\';
				}
			}

				// Checks weather capslock is enabled (returns TRUE if enabled, false otherwise)
				// thanks to http://24ways.org/2007/capturing-caps-lock

			function isCapslock(e) {
				var ev = e ? e : window.event;
				if (!ev) {
					return;
				}
				var targ = ev.target ? ev.target : ev.srcElement;
				// get key pressed
				var which = -1;
				if (ev.which) {
					which = ev.which;
				} else if (ev.keyCode) {
					which = ev.keyCode;
				}
				// get shift status
				var shift_status = false;
				if (ev.shiftKey) {
					shift_status = ev.shiftKey;
				} else if (ev.modifiers) {
					shift_status = !!(ev.modifiers & 4);
				}
				return (((which >= 65 && which <= 90) && !shift_status) ||
					((which >= 97 && which <= 122) && shift_status));
			}

				// prevent opening the login form in the backend frameset
			if (top.location.href != self.location.href) {
				top.location.href = self.location.href;
			}

			');

		return $JSCode;
	}


	/**
	 * Checks if labels from $GLOBALS['TYPO3_CONF_VARS']['BE']['loginLabels'] were changed, and merge them to $GLOBALS['LOCAL_LANG'] if needed
	 *
	 * This method keeps backwards compatibility, if you modified your
	 * labels with the install tool, we recommend to transfer this labels to a locallang.xml file
	 * using the llxml extension
	 *
	 * @return	void
	 * @deprecated since TYPO3 4.6, remove in TYPO3 4.8
	 */
	protected function mergeOldLoginLabels() {
			// Getting login labels
		$oldLoginLabels = trim($GLOBALS['TYPO3_CONF_VARS']['BE']['loginLabels']);
		if ($oldLoginLabels != '') {
			t3lib_div::deprecationLog('The use of $GLOBALS[\'TYPO3_CONF_VARS\'][\'BE\'][\'loginLabels\'] has been deprecated as of TYPO3 4.3, please use the according locallang.xml file.');
				// md5 hash of the default loginLabels string
			$defaultOldLoginLabelsHash = 'bcf0d32e58c6454ea50c6c956f1f18f0';
				// compare loginLabels from TYPO3_CONF_VARS to default value
			if (md5($oldLoginLabels) != $defaultOldLoginLabelsHash) {
				$lang = $GLOBALS['LANG']->lang;
				$oldLoginLabelArray = explode('|',$oldLoginLabels);
				$overrideLabelKeys = array(
					'labels.username'     => $oldLoginLabelArray[0],
					'labels.password'     => $oldLoginLabelArray[1],
					'labels.interface'    => $oldLoginLabelArray[2],
					'labels.submitLogin'  => $oldLoginLabelArray[3],
					'labels.submitLogout' => $oldLoginLabelArray[4],
					'availableInterfaces' => $oldLoginLabelArray[5],
					'headline'            => $oldLoginLabelArray[6],
					'info.jscookies'      => $oldLoginLabelArray[7],
					'newsheadline'        => $oldLoginLabelArray[8],
					'error.login'         => $oldLoginLabelArray[9],
				);
				if (!is_array($GLOBALS['LOCAL_LANG'][$lang])) {
					$GLOBALS['LOCAL_LANG'][$lang] = array();
				}
					// now override the labels from the LOCAL_LANG with the TYPO3_CONF_VARS
				foreach ($overrideLabelKeys as $labelKey => $label) {
					$GLOBALS['LANG']->overrideLL($labelKey, $label);
				}
			}
		}
	}

	/**
	 * Checks if login credentials are currently submitted
	 *
	 * @return	boolean
	 */
	protected function isLoginInProgress() {
		$username = t3lib_div::_GP('username');
		return !(empty($username) && empty($this->commandLI));
	}
}


if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/index.php'])) {
	include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/index.php']);
}



// Make instance:
$SOBE = t3lib_div::makeInstance('SC_index');
$SOBE->init();
$SOBE->main();
$SOBE->printContent();

?>
