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265 lines
9.3 KiB
265 lines
9.3 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* This debug script is used during zip support development ONLY.
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*
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* @package core_files
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* @copyright 2012 Petr Skoda
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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define('CLI_SCRIPT', true);
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require(__DIR__.'/../../../../config.php');
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require_once("$CFG->libdir/clilib.php");
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require_once("$CFG->libdir/filestorage/zip_packer.php");
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if (count($_SERVER['argv']) != 2 or !file_exists($_SERVER['argv'][1])) {
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cli_error("This script expects zip file name as the only parameter");
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}
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$archive = $_SERVER['argv'][1];
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// Note: the ZIP structure is described at http://www.pkware.com/documents/casestudies/APPNOTE.TXT
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if (!$filesize = filesize($archive) or !$fp = fopen($archive, 'rb+')) {
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cli_error("Can not open ZIP archive: $archive");
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}
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if ($filesize == 22) {
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$info = unpack('Vsig', fread($fp, 4));
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fclose($fp);
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if ($info['sig'] == 0x6054b50) {
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cli_error("This ZIP archive is empty: $archive");
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} else {
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cli_error("This is not a ZIP archive: $archive");
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}
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}
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fseek($fp, 0);
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$info = unpack('Vsig', fread($fp, 4));
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if ($info['sig'] !== 0x04034b50) {
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fclose($fp);
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cli_error("This is not a ZIP archive: $archive");
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}
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// Find end of central directory record.
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$centralend = zip_archive::zip_get_central_end($fp, $filesize);
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if ($centralend === false) {
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cli_error("This is not a ZIP archive: $archive");
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}
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if ($centralend['disk'] !== 0 or $centralend['disk_start'] !== 0) {
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cli_error("Multi-disk archives are not supported: $archive");
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}
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if ($centralend['offset'] === 0xFFFFFFFF) {
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cli_error("ZIP64 archives are not supported: $archive");
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}
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fseek($fp, $centralend['offset']);
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$data = fread($fp, $centralend['size']);
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$pos = 0;
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$files = array();
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for($i=0; $i<$centralend['entries']; $i++) {
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$file = zip_archive::zip_parse_file_header($data, $centralend, $pos);
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if ($file === false) {
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cli_error('Invalid Zip file header structure: '.$archive);
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}
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// Read local file header.
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fseek($fp, $file['local_offset']);
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$localfile = unpack('Vsig/vversion_req/vgeneral/vmethod/Vmodified/Vcrc/Vsize_compressed/Vsize/vname_length/vextra_length', fread($fp, 30));
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if ($localfile['sig'] !== 0x04034b50) {
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// Borked file!
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$file['error'] = 'Invalid local file signature';
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$files[] = $file;
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continue;
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}
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if ($localfile['name_length']) {
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$localfile['name'] = fread($fp, $localfile['name_length']);
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} else {
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$localfile['name'] = '';
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}
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$localfile['extra'] = array();
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$localfile['extra_data'] = '';
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if ($localfile['extra_length']) {
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$extradata = fread($fp, $localfile['extra_length']);
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$localfile['extra_data'] = $extradata;
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while (strlen($extradata) > 4) {
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$extra = unpack('vid/vsize', substr($extradata, 0, 4));
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$extra['data'] = substr($extradata, 4, $extra['size']);
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$extradata = substr($extradata, 4+$extra['size']);
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$localfile['extra'][] = $extra;
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}
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}
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$file['local'] = $localfile;
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$files[] = $file;
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}
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echo "Archive: $archive\n";
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echo "Number of files: {$centralend['entries']}\n";
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echo "Archive comment: \"{$centralend['comment']}\" ({$centralend['comment_length']} bytes)\n";
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foreach ($files as $i=>$file) {
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echo "======== File ".($i+1)." ==============================================\n";
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echo " Name: ".zip_print_name($file['name'])."\n";
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if ($file['comment'] !== '') {
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echo " Comment: \"{$file['comment']}\" ({$file['comment_length']} bytes)\n";
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}
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echo " Version: 0x".str_pad(dechex($file['version']), 4, '0', STR_PAD_LEFT)."\n";
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echo " Required: 0x".str_pad(dechex($file['version_req']), 4, '0', STR_PAD_LEFT)."\n";
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echo " Method: ".zip_print_method($file['method'])."\n";
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echo " General: ".zip_print_general($file['general'])."\n";
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echo " Modified: ".userdate(zip_dos2unixtime($file['modified']))."\n";
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echo " Size: ".zip_print_sizes($file['size'], $file['size_compressed'])."\n";
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echo " CRC-32: {$file['crc']}\n";
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foreach($file['extra'] as $j=>$extra) {
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echo " Extra ".($j+1).": ".zip_print_extra($extra)."\n";
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}
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if (!empty($file['local']['error'])) {
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echo " Local ERROR: {$file['local']['error']}\n";
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continue;
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}
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$localfile = $file['local'];
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if ($localfile['name'] !== $file['name']) {
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echo " Local name: ".zip_print_name($localfile['name'])."\n";
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}
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if ($localfile['version_req'] !== $file['version_req']) {
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echo " Local required: 0x".str_pad(dechex($localfile['version_req']), 4, '0', STR_PAD_LEFT)."\n";
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}
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if ($localfile['method'] !== $file['method']) {
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echo " Local method: ".zip_print_method($localfile['method'])."\n";
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}
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if ($localfile['general'] !== $file['general']) {
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echo " Local general: ".zip_print_general($localfile['general'])."\n";
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}
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if ($localfile['modified'] !== $file['modified']) {
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echo " Local modified: ".userdate(zip_dos2unixtime($localfile['modified']))."\n";
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}
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if ($localfile['size'] !== $file['size']) {
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echo " Local size: ".zip_print_sizes($localfile['size'], $localfile['size_compressed'])."\n";
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}
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if ($localfile['crc'] !== $file['crc']) {
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echo " Local CRC-32: {$localfile['crc']}\n";
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}
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foreach($localfile['extra'] as $j=>$extra) {
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echo " Local extra ".($j+1).": ".zip_print_extra($extra)."\n";
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}
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}
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fclose($fp);
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exit(0);
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// === Some useful functions ======================================
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function zip_print_name($name) {
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$size = strlen($name);
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$crc = crc32($name);
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return "\"$name\" ($size bytes) - CRC $crc";
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}
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function zip_print_method($method) {
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$desc = '';
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switch($method) {
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case 0: $desc = 'Stored'; break;
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case 1: $desc = 'Shrunk'; break;
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case 2: $desc = 'Reduced factor 1'; break;
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case 3: $desc = 'Reduced factor 2'; break;
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case 4: $desc = 'Reduced factor 3'; break;
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case 5: $desc = 'Reduced factor 4'; break;
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case 6: $desc = 'Imploded'; break;
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case 8: $desc = 'Deflated'; break;
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case 9: $desc = 'Deflate64'; break;
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case 10: $desc = 'old IBM TERSE'; break;
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case 12: $desc = 'BZIP2'; break;
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case 14: $desc = 'LZMA'; break;
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case 18: $desc = 'IBM TERSE'; break;
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case 19: $desc = 'IBM LZ77'; break;
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case 97: $desc = 'WavPack'; break;
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case 98: $desc = 'PPMd v1'; break;
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}
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if ($desc) {
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$desc = " ($desc)";
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}
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return "0x".str_pad(dechex($method), 4, '0', STR_PAD_LEFT).$desc;
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}
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function zip_print_general($general) {
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$desc = array();
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if ($general & pow(2, 0)) {
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$desc[] = 'Encrypted';
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}
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if ($general & pow(2, 11)) {
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$desc[] = 'Unicode name';
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}
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if ($desc) {
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$desc = " (".implode(', ', $desc).")";
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} else {
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$desc = '';
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}
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return str_pad(decbin($general), 16, '0', STR_PAD_LEFT).$desc;
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}
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/**
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* Convert MS date+time format to unix timestamp:
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* http://msdn.microsoft.com/en-us/library/windows/desktop/ms724274(v=vs.85).aspx
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*
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* Copied from: http://plugins.svn.wordpress.org/wp2epub/trunk/zipcreate/functions.lib.php
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* author: redmonkey
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* license: GPL
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*/
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function zip_dos2unixtime($dostime) {
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$sec = 2 * ($dostime & 0x1f);
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$min = ($dostime >> 5) & 0x3f;
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$hrs = ($dostime >> 11) & 0x1f;
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$day = ($dostime >> 16) & 0x1f;
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$mon = ($dostime >> 21) & 0x0f;
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$year = (($dostime >> 25) & 0x7f) + 1980;
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return mktime($hrs, $min, $sec, $mon, $day, $year);
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}
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function zip_print_sizes($size, $compressed) {
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return "$size ==> $compressed bytes";
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}
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function zip_print_extra($extra) {
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$desc = '';
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$info = "- ".bin2hex($extra['data'])." ({$extra['size']} bytes)";
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switch($extra['id']) {
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case 0x0009: $desc = 'OS/2'; break;
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case 0x000a: $desc = 'NTFS'; break;
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case 0x000d: $desc = 'UNIX'; break;
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case 0x5455: $desc = 'Extended timestamp'; break;
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case 0x5855: $desc = 'Infor-ZIP (original)'; break;
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case 0x7075:
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$desc = 'Info-ZIP Unicode path';
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$data = unpack('cversion/Vcrc', substr($extra['data'], 0, 5));
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$name = substr($extra['data'], 5);
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$size = strlen($name);
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if ($data['version'] === 1) {
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$info = "- \"$name\" ($size bytes) - CRC {$data['crc']}";
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}
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break;
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case 0x7865: $desc = 'Info-ZIP UNIX (new)'; break;
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case 0x7875: $desc = 'Info-ZIP UNIX (3rd generation)'; break;
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}
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if ($desc) {
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$desc = " ($desc)";
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}
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return "0x".str_pad(dechex($extra['id']), 4, '0', STR_PAD_LEFT)."$desc $info";
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}
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