514 lines
25 KiB
PHP
Executable File
514 lines
25 KiB
PHP
Executable File
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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// also https://github.com/JamesHeinrich/getID3 //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.archive.zip.php //
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// module for analyzing pkZip files //
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// dependencies: NONE //
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// ///
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/////////////////////////////////////////////////////////////////
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class getid3_zip extends getid3_handler
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{
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public function Analyze() {
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$info = &$this->getid3->info;
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$info['fileformat'] = 'zip';
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$info['zip']['encoding'] = 'ISO-8859-1';
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$info['zip']['files'] = array();
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$info['zip']['compressed_size'] = 0;
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$info['zip']['uncompressed_size'] = 0;
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$info['zip']['entries_count'] = 0;
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if (!getid3_lib::intValueSupported($info['filesize'])) {
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$this->error('File is larger than '.round(PHP_INT_MAX / 1073741824).'GB, not supported by PHP');
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return false;
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} else {
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$EOCDsearchData = '';
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$EOCDsearchCounter = 0;
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while ($EOCDsearchCounter++ < 512) {
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$this->fseek(-128 * $EOCDsearchCounter, SEEK_END);
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$EOCDsearchData = $this->fread(128).$EOCDsearchData;
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if (strstr($EOCDsearchData, 'PK'."\x05\x06")) {
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$EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06");
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$this->fseek((-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END);
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$info['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory();
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$this->fseek($info['zip']['end_central_directory']['directory_offset']);
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$info['zip']['entries_count'] = 0;
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while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($this->getid3->fp)) {
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$info['zip']['central_directory'][] = $centraldirectoryentry;
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$info['zip']['entries_count']++;
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$info['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
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$info['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
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//if ($centraldirectoryentry['uncompressed_size'] > 0) { zero-byte files are valid
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if (!empty($centraldirectoryentry['filename'])) {
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$info['zip']['files'] = getid3_lib::array_merge_clobber($info['zip']['files'], getid3_lib::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size']));
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}
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}
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if ($info['zip']['entries_count'] == 0) {
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$this->error('No Central Directory entries found (truncated file?)');
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return false;
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}
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if (!empty($info['zip']['end_central_directory']['comment'])) {
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$info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
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}
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if (isset($info['zip']['central_directory'][0]['compression_method'])) {
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$info['zip']['compression_method'] = $info['zip']['central_directory'][0]['compression_method'];
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}
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if (isset($info['zip']['central_directory'][0]['flags']['compression_speed'])) {
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$info['zip']['compression_speed'] = $info['zip']['central_directory'][0]['flags']['compression_speed'];
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}
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if (isset($info['zip']['compression_method']) && ($info['zip']['compression_method'] == 'store') && !isset($info['zip']['compression_speed'])) {
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$info['zip']['compression_speed'] = 'store';
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}
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// secondary check - we (should) already have all the info we NEED from the Central Directory above, but scanning each
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// Local File Header entry will
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foreach ($info['zip']['central_directory'] as $central_directory_entry) {
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$this->fseek($central_directory_entry['entry_offset']);
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if ($fileentry = $this->ZIPparseLocalFileHeader()) {
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$info['zip']['entries'][] = $fileentry;
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} else {
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$this->warning('Error parsing Local File Header at offset '.$central_directory_entry['entry_offset']);
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}
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}
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if (!empty($info['zip']['files']['[Content_Types].xml']) &&
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!empty($info['zip']['files']['_rels']['.rels']) &&
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!empty($info['zip']['files']['docProps']['app.xml']) &&
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!empty($info['zip']['files']['docProps']['core.xml'])) {
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// http://technet.microsoft.com/en-us/library/cc179224.aspx
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$info['fileformat'] = 'zip.msoffice';
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if (!empty($ThisFileInfo['zip']['files']['ppt'])) {
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$info['mime_type'] = 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
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} elseif (!empty($ThisFileInfo['zip']['files']['xl'])) {
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$info['mime_type'] = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
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} elseif (!empty($ThisFileInfo['zip']['files']['word'])) {
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$info['mime_type'] = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
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}
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}
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return true;
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}
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}
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}
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if (!$this->getZIPentriesFilepointer()) {
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unset($info['zip']);
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$info['fileformat'] = '';
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$this->error('Cannot find End Of Central Directory (truncated file?)');
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return false;
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}
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// central directory couldn't be found and/or parsed
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// scan through actual file data entries, recover as much as possible from probable trucated file
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if ($info['zip']['compressed_size'] > ($info['filesize'] - 46 - 22)) {
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$this->error('Warning: Truncated file! - Total compressed file sizes ('.$info['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($info['filesize'] - 46 - 22).' bytes)');
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}
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$this->error('Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete');
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foreach ($info['zip']['entries'] as $key => $valuearray) {
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$info['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size'];
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}
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return true;
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}
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public function getZIPHeaderFilepointerTopDown() {
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$info = &$this->getid3->info;
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$info['fileformat'] = 'zip';
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$info['zip']['compressed_size'] = 0;
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$info['zip']['uncompressed_size'] = 0;
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$info['zip']['entries_count'] = 0;
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rewind($this->getid3->fp);
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while ($fileentry = $this->ZIPparseLocalFileHeader()) {
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$info['zip']['entries'][] = $fileentry;
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$info['zip']['entries_count']++;
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}
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if ($info['zip']['entries_count'] == 0) {
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$this->error('No Local File Header entries found');
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return false;
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}
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$info['zip']['entries_count'] = 0;
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while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($this->getid3->fp)) {
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$info['zip']['central_directory'][] = $centraldirectoryentry;
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$info['zip']['entries_count']++;
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$info['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
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$info['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
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}
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if ($info['zip']['entries_count'] == 0) {
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$this->error('No Central Directory entries found (truncated file?)');
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return false;
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}
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if ($EOCD = $this->ZIPparseEndOfCentralDirectory()) {
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$info['zip']['end_central_directory'] = $EOCD;
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} else {
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$this->error('No End Of Central Directory entry found (truncated file?)');
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return false;
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}
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if (!empty($info['zip']['end_central_directory']['comment'])) {
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$info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
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}
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return true;
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}
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public function getZIPentriesFilepointer() {
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$info = &$this->getid3->info;
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$info['zip']['compressed_size'] = 0;
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$info['zip']['uncompressed_size'] = 0;
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$info['zip']['entries_count'] = 0;
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rewind($this->getid3->fp);
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while ($fileentry = $this->ZIPparseLocalFileHeader()) {
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$info['zip']['entries'][] = $fileentry;
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$info['zip']['entries_count']++;
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$info['zip']['compressed_size'] += $fileentry['compressed_size'];
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$info['zip']['uncompressed_size'] += $fileentry['uncompressed_size'];
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}
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if ($info['zip']['entries_count'] == 0) {
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$this->error('No Local File Header entries found');
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return false;
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}
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return true;
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}
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public function ZIPparseLocalFileHeader() {
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$LocalFileHeader['offset'] = $this->ftell();
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$ZIPlocalFileHeader = $this->fread(30);
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$LocalFileHeader['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4));
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if ($LocalFileHeader['raw']['signature'] != 0x04034B50) { // "PK\x03\x04"
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// invalid Local File Header Signature
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$this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$LocalFileHeader['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 4, 2));
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$LocalFileHeader['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 6, 2));
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$LocalFileHeader['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 8, 2));
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$LocalFileHeader['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2));
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$LocalFileHeader['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2));
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$LocalFileHeader['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4));
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$LocalFileHeader['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4));
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$LocalFileHeader['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4));
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$LocalFileHeader['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2));
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$LocalFileHeader['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2));
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$LocalFileHeader['extract_version'] = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10);
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$LocalFileHeader['host_os'] = $this->ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8);
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$LocalFileHeader['compression_method'] = $this->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']);
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$LocalFileHeader['compressed_size'] = $LocalFileHeader['raw']['compressed_size'];
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$LocalFileHeader['uncompressed_size'] = $LocalFileHeader['raw']['uncompressed_size'];
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$LocalFileHeader['flags'] = $this->ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']);
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$LocalFileHeader['last_modified_timestamp'] = $this->DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']);
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$FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] + $LocalFileHeader['raw']['extra_field_length'];
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if ($FilenameExtrafieldLength > 0) {
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$ZIPlocalFileHeader .= $this->fread($FilenameExtrafieldLength);
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if ($LocalFileHeader['raw']['filename_length'] > 0) {
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$LocalFileHeader['filename'] = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']);
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}
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if ($LocalFileHeader['raw']['extra_field_length'] > 0) {
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$LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 + $LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']);
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}
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}
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if ($LocalFileHeader['compressed_size'] == 0) {
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// *Could* be a zero-byte file
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// But could also be a file written on the fly that didn't know compressed filesize beforehand.
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// Correct compressed filesize should be in the data_descriptor located after this file data, and also in Central Directory (at end of zip file)
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if (!empty($this->getid3->info['zip']['central_directory'])) {
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foreach ($this->getid3->info['zip']['central_directory'] as $central_directory_entry) {
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if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) {
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if ($central_directory_entry['compressed_size'] > 0) {
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// overwrite local zero value (but not ['raw']'compressed_size']) so that seeking for data_descriptor (and next file entry) works correctly
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$LocalFileHeader['compressed_size'] = $central_directory_entry['compressed_size'];
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}
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break;
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}
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}
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}
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}
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$LocalFileHeader['data_offset'] = $this->ftell();
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$this->fseek($LocalFileHeader['compressed_size'], SEEK_CUR); // this should (but may not) match value in $LocalFileHeader['raw']['compressed_size'] -- $LocalFileHeader['compressed_size'] could have been overwritten above with value from Central Directory
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if ($LocalFileHeader['flags']['data_descriptor_used']) {
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$DataDescriptor = $this->fread(16);
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$LocalFileHeader['data_descriptor']['signature'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 0, 4));
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if ($LocalFileHeader['data_descriptor']['signature'] != 0x08074B50) { // "PK\x07\x08"
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$this->getid3->warning[] = 'invalid Local File Header Data Descriptor Signature at offset '.($this->ftell() - 16).' - expecting 08 07 4B 50, found '.getid3_lib::PrintHexBytes($LocalFileHeader['data_descriptor']['signature']);
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$this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$LocalFileHeader['data_descriptor']['crc_32'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 4, 4));
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$LocalFileHeader['data_descriptor']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 8, 4));
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$LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 12, 4));
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if (!$LocalFileHeader['raw']['compressed_size'] && $LocalFileHeader['data_descriptor']['compressed_size']) {
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foreach ($this->getid3->info['zip']['central_directory'] as $central_directory_entry) {
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if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) {
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if ($LocalFileHeader['data_descriptor']['compressed_size'] == $central_directory_entry['compressed_size']) {
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// $LocalFileHeader['compressed_size'] already set from Central Directory
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} else {
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$this->warning('conflicting compressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['compressed_size'].') vs Central Directory ('.$central_directory_entry['compressed_size'].') for file at offset '.$LocalFileHeader['offset']);
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}
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if ($LocalFileHeader['data_descriptor']['uncompressed_size'] == $central_directory_entry['uncompressed_size']) {
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$LocalFileHeader['uncompressed_size'] = $LocalFileHeader['data_descriptor']['uncompressed_size'];
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} else {
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$this->warning('conflicting uncompressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['uncompressed_size'].') vs Central Directory ('.$central_directory_entry['uncompressed_size'].') for file at offset '.$LocalFileHeader['offset']);
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}
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break;
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}
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}
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}
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}
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return $LocalFileHeader;
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}
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public function ZIPparseCentralDirectory() {
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$CentralDirectory['offset'] = $this->ftell();
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$ZIPcentralDirectory = $this->fread(46);
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$CentralDirectory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4));
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if ($CentralDirectory['raw']['signature'] != 0x02014B50) {
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// invalid Central Directory Signature
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$this->fseek($CentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$CentralDirectory['raw']['create_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 4, 2));
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$CentralDirectory['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 6, 2));
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$CentralDirectory['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 8, 2));
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$CentralDirectory['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2));
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$CentralDirectory['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2));
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$CentralDirectory['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2));
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$CentralDirectory['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4));
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$CentralDirectory['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4));
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$CentralDirectory['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4));
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$CentralDirectory['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2));
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$CentralDirectory['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2));
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$CentralDirectory['raw']['file_comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2));
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$CentralDirectory['raw']['disk_number_start'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2));
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$CentralDirectory['raw']['internal_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2));
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$CentralDirectory['raw']['external_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4));
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$CentralDirectory['raw']['local_header_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4));
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$CentralDirectory['entry_offset'] = $CentralDirectory['raw']['local_header_offset'];
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$CentralDirectory['create_version'] = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10);
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$CentralDirectory['extract_version'] = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10);
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$CentralDirectory['host_os'] = $this->ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8);
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$CentralDirectory['compression_method'] = $this->ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']);
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$CentralDirectory['compressed_size'] = $CentralDirectory['raw']['compressed_size'];
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$CentralDirectory['uncompressed_size'] = $CentralDirectory['raw']['uncompressed_size'];
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$CentralDirectory['flags'] = $this->ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']);
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$CentralDirectory['last_modified_timestamp'] = $this->DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']);
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$FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'] + $CentralDirectory['raw']['file_comment_length'];
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if ($FilenameExtrafieldCommentLength > 0) {
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$FilenameExtrafieldComment = $this->fread($FilenameExtrafieldCommentLength);
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if ($CentralDirectory['raw']['filename_length'] > 0) {
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$CentralDirectory['filename'] = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']);
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}
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if ($CentralDirectory['raw']['extra_field_length'] > 0) {
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$CentralDirectory['raw']['extra_field_data'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']);
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}
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if ($CentralDirectory['raw']['file_comment_length'] > 0) {
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$CentralDirectory['file_comment'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']);
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}
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}
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return $CentralDirectory;
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}
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public function ZIPparseEndOfCentralDirectory() {
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$EndOfCentralDirectory['offset'] = $this->ftell();
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$ZIPendOfCentralDirectory = $this->fread(22);
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$EndOfCentralDirectory['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4));
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if ($EndOfCentralDirectory['signature'] != 0x06054B50) {
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// invalid End Of Central Directory Signature
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$this->fseek($EndOfCentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$EndOfCentralDirectory['disk_number_current'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 4, 2));
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$EndOfCentralDirectory['disk_number_start_directory'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 6, 2));
|
|
$EndOfCentralDirectory['directory_entries_this_disk'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 8, 2));
|
|
$EndOfCentralDirectory['directory_entries_total'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 10, 2));
|
|
$EndOfCentralDirectory['directory_size'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 12, 4));
|
|
$EndOfCentralDirectory['directory_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 16, 4));
|
|
$EndOfCentralDirectory['comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 20, 2));
|
|
|
|
if ($EndOfCentralDirectory['comment_length'] > 0) {
|
|
$EndOfCentralDirectory['comment'] = $this->fread($EndOfCentralDirectory['comment_length']);
|
|
}
|
|
|
|
return $EndOfCentralDirectory;
|
|
}
|
|
|
|
|
|
public static function ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod) {
|
|
// https://users.cs.jmu.edu/buchhofp/forensics/formats/pkzip-printable.html
|
|
$ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001);
|
|
// 0x0002 -- see below
|
|
// 0x0004 -- see below
|
|
$ParsedFlags['data_descriptor_used'] = (bool) ($flagbytes & 0x0008);
|
|
$ParsedFlags['enhanced_deflation'] = (bool) ($flagbytes & 0x0010);
|
|
$ParsedFlags['compressed_patched_data'] = (bool) ($flagbytes & 0x0020);
|
|
$ParsedFlags['strong_encryption'] = (bool) ($flagbytes & 0x0040);
|
|
// 0x0080 - unused
|
|
// 0x0100 - unused
|
|
// 0x0200 - unused
|
|
// 0x0400 - unused
|
|
$ParsedFlags['language_encoding'] = (bool) ($flagbytes & 0x0800);
|
|
// 0x1000 - reserved
|
|
$ParsedFlags['mask_header_values'] = (bool) ($flagbytes & 0x2000);
|
|
// 0x4000 - reserved
|
|
// 0x8000 - reserved
|
|
|
|
switch ($compressionmethod) {
|
|
case 6:
|
|
$ParsedFlags['dictionary_size'] = (($flagbytes & 0x0002) ? 8192 : 4096);
|
|
$ParsedFlags['shannon_fano_trees'] = (($flagbytes & 0x0004) ? 3 : 2);
|
|
break;
|
|
|
|
case 8:
|
|
case 9:
|
|
switch (($flagbytes & 0x0006) >> 1) {
|
|
case 0:
|
|
$ParsedFlags['compression_speed'] = 'normal';
|
|
break;
|
|
case 1:
|
|
$ParsedFlags['compression_speed'] = 'maximum';
|
|
break;
|
|
case 2:
|
|
$ParsedFlags['compression_speed'] = 'fast';
|
|
break;
|
|
case 3:
|
|
$ParsedFlags['compression_speed'] = 'superfast';
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return $ParsedFlags;
|
|
}
|
|
|
|
|
|
public static function ZIPversionOSLookup($index) {
|
|
static $ZIPversionOSLookup = array(
|
|
0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)',
|
|
1 => 'Amiga',
|
|
2 => 'OpenVMS',
|
|
3 => 'Unix',
|
|
4 => 'VM/CMS',
|
|
5 => 'Atari ST',
|
|
6 => 'OS/2 H.P.F.S.',
|
|
7 => 'Macintosh',
|
|
8 => 'Z-System',
|
|
9 => 'CP/M',
|
|
10 => 'Windows NTFS',
|
|
11 => 'MVS',
|
|
12 => 'VSE',
|
|
13 => 'Acorn Risc',
|
|
14 => 'VFAT',
|
|
15 => 'Alternate MVS',
|
|
16 => 'BeOS',
|
|
17 => 'Tandem',
|
|
18 => 'OS/400',
|
|
19 => 'OS/X (Darwin)',
|
|
);
|
|
|
|
return (isset($ZIPversionOSLookup[$index]) ? $ZIPversionOSLookup[$index] : '[unknown]');
|
|
}
|
|
|
|
public static function ZIPcompressionMethodLookup($index) {
|
|
// http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/ZIP.html
|
|
static $ZIPcompressionMethodLookup = array(
|
|
0 => 'store',
|
|
1 => 'shrink',
|
|
2 => 'reduce-1',
|
|
3 => 'reduce-2',
|
|
4 => 'reduce-3',
|
|
5 => 'reduce-4',
|
|
6 => 'implode',
|
|
7 => 'tokenize',
|
|
8 => 'deflate',
|
|
9 => 'deflate64',
|
|
10 => 'Imploded (old IBM TERSE)',
|
|
11 => 'RESERVED[11]',
|
|
12 => 'BZIP2',
|
|
13 => 'RESERVED[13]',
|
|
14 => 'LZMA (EFS)',
|
|
15 => 'RESERVED[15]',
|
|
16 => 'RESERVED[16]',
|
|
17 => 'RESERVED[17]',
|
|
18 => 'IBM TERSE (new)',
|
|
19 => 'IBM LZ77 z Architecture (PFS)',
|
|
96 => 'JPEG recompressed',
|
|
97 => 'WavPack compressed',
|
|
98 => 'PPMd version I, Rev 1',
|
|
);
|
|
|
|
return (isset($ZIPcompressionMethodLookup[$index]) ? $ZIPcompressionMethodLookup[$index] : '[unknown]');
|
|
}
|
|
|
|
public static function DOStime2UNIXtime($DOSdate, $DOStime) {
|
|
// wFatDate
|
|
// Specifies the MS-DOS date. The date is a packed 16-bit value with the following format:
|
|
// Bits Contents
|
|
// 0-4 Day of the month (1-31)
|
|
// 5-8 Month (1 = January, 2 = February, and so on)
|
|
// 9-15 Year offset from 1980 (add 1980 to get actual year)
|
|
|
|
$UNIXday = ($DOSdate & 0x001F);
|
|
$UNIXmonth = (($DOSdate & 0x01E0) >> 5);
|
|
$UNIXyear = (($DOSdate & 0xFE00) >> 9) + 1980;
|
|
|
|
// wFatTime
|
|
// Specifies the MS-DOS time. The time is a packed 16-bit value with the following format:
|
|
// Bits Contents
|
|
// 0-4 Second divided by 2
|
|
// 5-10 Minute (0-59)
|
|
// 11-15 Hour (0-23 on a 24-hour clock)
|
|
|
|
$UNIXsecond = ($DOStime & 0x001F) * 2;
|
|
$UNIXminute = (($DOStime & 0x07E0) >> 5);
|
|
$UNIXhour = (($DOStime & 0xF800) >> 11);
|
|
|
|
return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
|
|
}
|
|
|
|
}
|