class.tx_install_ajax.php

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<?php
/***************************************************************
*  Copyright notice
*
*  (c) 2009-2011 Marcus Krause, Helmut Hummel (security@typo3.org)
*  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!
***************************************************************/



// *******************************
// Set error reporting
// *******************************
if (defined('E_DEPRECATED')) {
    error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED);
} else {
    error_reporting(E_ALL ^ E_NOTICE);
}


// ***********************
// Paths are setup
// ***********************
define('TYPO3_OS', stristr(PHP_OS,'win')&&!stristr(PHP_OS,'darwin')?'WIN':'');
define('TYPO3_MODE','FE');

if(!defined('PATH_thisScript')) {
    define('PATH_thisScript', str_replace('//', '/', str_replace('\\', '/',
        (PHP_SAPI == 'fpm-fcgi' || PHP_SAPI == 'cgi' || PHP_SAPI == 'isapi' || PHP_SAPI == 'cgi-fcgi') &&
        ($_SERVER['ORIG_PATH_TRANSLATED'] ? $_SERVER['ORIG_PATH_TRANSLATED'] : $_SERVER['PATH_TRANSLATED']) ?
        ($_SERVER['ORIG_PATH_TRANSLATED'] ? $_SERVER['ORIG_PATH_TRANSLATED'] : $_SERVER['PATH_TRANSLATED']) :
        ($_SERVER['ORIG_SCRIPT_FILENAME'] ? $_SERVER['ORIG_SCRIPT_FILENAME'] : $_SERVER['SCRIPT_FILENAME']))));
}

if (!defined('PATH_site'))          define('PATH_site', dirname(PATH_thisScript).'/');
if (!defined('PATH_t3lib'))         define('PATH_t3lib', PATH_site.'t3lib/');
define('PATH_tslib', PATH_site.'tslib/');
define('PATH_typo3conf', PATH_site.'typo3conf/');
define('TYPO3_mainDir', 'typo3/');      // This is the directory of the backend administration for the sites of this TYPO3 installation.

if (!@is_dir(PATH_typo3conf))   die('Cannot find configuration. This file is probably executed from the wrong location.');


require_once(PATH_t3lib.'class.t3lib_div.php');

/**
 * This is the eID handler for install tool AJAX calls.
 *
 * @author  Marcus Krause <security@typo3.org>
 */
class tx_install_ajax {


    /**
     * Keeps content to be printed.
     *
     * @var string
     */
    var $content;

    /**
     * Keeps command to process.
     *
     * @var string
     */
    var $cmd = '';


    /**
     * Init function, setting the input vars in the class scope.
     *
     * @return  void
     */
    function init() {
        $this->cmd = t3lib_div::_GP('cmd');
    }

    /**
     * Main function which creates the AJAX call return string.
     * It is stored in $this->content.
     *
     * @return  void
     */
    function main() {
            // Create output:
        switch ($this->cmd) {
            case 'encryptionKey':
            default:
                $this->content = $this->createEncryptionKey();
                $this->addTempContentHttpHeaders();
                break;
        }
    }

    /**
     * Outputs the content from $this->content
     *
     * @return  void
     */
    function printContent() {
        if (!headers_sent()) {
            header('Content-Length: ' . strlen($this->content));
        }
        echo $this->content;
    }

    /**
     * Returns a newly created TYPO3 encryption key with a given length.
     *
     * @param  integer  $keyLength  desired key length
     * @return string
     */
    function createEncryptionKey($keyLength = 96) {
        if (!headers_sent()) {
            header("Content-type: text/plain");
        }

        return t3lib_div::getRandomHexString($keyLength);
    }

    /**
     * Sends cache control headers that prevent caching in user agents.
     *
     */
    function addTempContentHttpHeaders() {
        if (!headers_sent()) {
                // see RFC 2616
                // see Microsoft Knowledge Base #234067
            header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
            header('Cache-Control: no-cache, must-revalidate');
            header('Pragma: no-cache');
            header('Expires: -1');
        }
    }
}

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

if (defined('TYPO3_MODE') && isset($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/install/mod/class.tx_install_ajax.php'])) {
    include_once($GLOBALS['TYPO3_CONF_VARS'][TYPO3_MODE]['XCLASS']['typo3/sysext/install/mod/class.tx_install_ajax.php']);
}
?>