1<?php
2
3/////////////////////////////////////////////////////////////////
4/// getID3() by James Heinrich <info@getid3.org>               //
5//  available at https://github.com/JamesHeinrich/getID3       //
6//            or https://www.getid3.org                        //
7//            or http://getid3.sourceforge.net                 //
8//  see readme.txt for more details                            //
9/////////////////////////////////////////////////////////////////
10//                                                             //
11// module.archive.xz.php                                       //
12// module for analyzing XZ files                               //
13// dependencies: NONE                                          //
14//                                                            ///
15/////////////////////////////////////////////////////////////////
16
17if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
18	exit;
19}
20
21class getid3_xz extends getid3_handler
22{
23
24	/**
25	 * @return bool
26	 */
27	public function Analyze() {
28		$info = &$this->getid3->info;
29
30		$this->fseek($info['avdataoffset']);
31		$xzheader = $this->fread(6);
32
33		// https://tukaani.org/xz/xz-file-format-1.0.4.txt
34		$info['xz']['stream_header']['magic'] = substr($xzheader, 0, 6);
35		if ($info['xz']['stream_header']['magic'] != "\xFD".'7zXZ'."\x00") {
36			$this->error('Invalid XZ stream header magic (expecting FD 37 7A 58 5A 00, found '.getid3_lib::PrintHexBytes($info['xz']['stream_header']['magic']).') at offset '.$info['avdataoffset']);
37			return false;
38		}
39		$info['fileformat'] = 'xz';
40		$this->error('XZ parsing not enabled in this version of getID3() ['.$this->getid3->version().']');
41		return false;
42
43	}
44
45}
46