--- /dev/null
+<?php
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org> //
+// available at http://getid3.sourceforge.net //
+// or http://www.getid3.org //
+// also https://github.com/JamesHeinrich/getID3 //
+/////////////////////////////////////////////////////////////////
+// See readme.txt for more details //
+/////////////////////////////////////////////////////////////////
+// //
+// module.archive.zip.php //
+// module for analyzing pkZip files //
+// dependencies: NONE //
+// ///
+/////////////////////////////////////////////////////////////////
+
+
+class getid3_zip extends getid3_handler
+{
+
+ public function Analyze() {
+ $info = &$this->getid3->info;
+
+ $info['fileformat'] = 'zip';
+ $info['zip']['encoding'] = 'ISO-8859-1';
+ $info['zip']['files'] = array();
+
+ $info['zip']['compressed_size'] = 0;
+ $info['zip']['uncompressed_size'] = 0;
+ $info['zip']['entries_count'] = 0;
+
+ if (!getid3_lib::intValueSupported($info['filesize'])) {
+ $this->error('File is larger than '.round(PHP_INT_MAX / 1073741824).'GB, not supported by PHP');
+ return false;
+ } else {
+ $EOCDsearchData = '';
+ $EOCDsearchCounter = 0;
+ while ($EOCDsearchCounter++ < 512) {
+
+ $this->fseek(-128 * $EOCDsearchCounter, SEEK_END);
+ $EOCDsearchData = $this->fread(128).$EOCDsearchData;
+
+ if (strstr($EOCDsearchData, 'PK'."\x05\x06")) {
+
+ $EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06");
+ $this->fseek((-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END);
+ $info['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory();
+
+ $this->fseek($info['zip']['end_central_directory']['directory_offset']);
+ $info['zip']['entries_count'] = 0;
+ while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($this->getid3->fp)) {
+ $info['zip']['central_directory'][] = $centraldirectoryentry;
+ $info['zip']['entries_count']++;
+ $info['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
+ $info['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
+
+ //if ($centraldirectoryentry['uncompressed_size'] > 0) { zero-byte files are valid
+ if (!empty($centraldirectoryentry['filename'])) {
+ $info['zip']['files'] = getid3_lib::array_merge_clobber($info['zip']['files'], getid3_lib::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size']));
+ }
+ }
+
+ if ($info['zip']['entries_count'] == 0) {
+ $this->error('No Central Directory entries found (truncated file?)');
+ return false;
+ }
+
+ if (!empty($info['zip']['end_central_directory']['comment'])) {
+ $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
+ }
+
+ if (isset($info['zip']['central_directory'][0]['compression_method'])) {
+ $info['zip']['compression_method'] = $info['zip']['central_directory'][0]['compression_method'];
+ }
+ if (isset($info['zip']['central_directory'][0]['flags']['compression_speed'])) {
+ $info['zip']['compression_speed'] = $info['zip']['central_directory'][0]['flags']['compression_speed'];
+ }
+ if (isset($info['zip']['compression_method']) && ($info['zip']['compression_method'] == 'store') && !isset($info['zip']['compression_speed'])) {
+ $info['zip']['compression_speed'] = 'store';
+ }
+
+ // secondary check - we (should) already have all the info we NEED from the Central Directory above, but scanning each
+ // Local File Header entry will
+ foreach ($info['zip']['central_directory'] as $central_directory_entry) {
+ $this->fseek($central_directory_entry['entry_offset']);
+ if ($fileentry = $this->ZIPparseLocalFileHeader()) {
+ $info['zip']['entries'][] = $fileentry;
+ } else {
+ $this->warning('Error parsing Local File Header at offset '.$central_directory_entry['entry_offset']);
+ }
+ }
+
+ if (!empty($info['zip']['files']['[Content_Types].xml']) &&
+ !empty($info['zip']['files']['_rels']['.rels']) &&
+ !empty($info['zip']['files']['docProps']['app.xml']) &&
+ !empty($info['zip']['files']['docProps']['core.xml'])) {
+ // http://technet.microsoft.com/en-us/library/cc179224.aspx
+ $info['fileformat'] = 'zip.msoffice';
+ if (!empty($ThisFileInfo['zip']['files']['ppt'])) {
+ $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
+ } elseif (!empty($ThisFileInfo['zip']['files']['xl'])) {
+ $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
+ } elseif (!empty($ThisFileInfo['zip']['files']['word'])) {
+ $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
+ }
+ }
+
+ return true;
+ }
+ }
+ }
+
+ if (!$this->getZIPentriesFilepointer()) {
+ unset($info['zip']);
+ $info['fileformat'] = '';
+ $this->error('Cannot find End Of Central Directory (truncated file?)');
+ return false;
+ }
+
+ // central directory couldn't be found and/or parsed
+ // scan through actual file data entries, recover as much as possible from probable trucated file
+ if ($info['zip']['compressed_size'] > ($info['filesize'] - 46 - 22)) {
+ $this->error('Warning: Truncated file! - Total compressed file sizes ('.$info['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($info['filesize'] - 46 - 22).' bytes)');
+ }
+ $this->error('Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete');
+ foreach ($info['zip']['entries'] as $key => $valuearray) {
+ $info['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size'];
+ }
+ return true;
+ }
+
+
+ public function getZIPHeaderFilepointerTopDown() {
+ $info = &$this->getid3->info;
+
+ $info['fileformat'] = 'zip';
+
+ $info['zip']['compressed_size'] = 0;
+ $info['zip']['uncompressed_size'] = 0;
+ $info['zip']['entries_count'] = 0;
+
+ rewind($this->getid3->fp);
+ while ($fileentry = $this->ZIPparseLocalFileHeader()) {
+ $info['zip']['entries'][] = $fileentry;
+ $info['zip']['entries_count']++;
+ }
+ if ($info['zip']['entries_count'] == 0) {
+ $this->error('No Local File Header entries found');
+ return false;
+ }
+
+ $info['zip']['entries_count'] = 0;
+ while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($this->getid3->fp)) {
+ $info['zip']['central_directory'][] = $centraldirectoryentry;
+ $info['zip']['entries_count']++;
+ $info['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
+ $info['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
+ }
+ if ($info['zip']['entries_count'] == 0) {
+ $this->error('No Central Directory entries found (truncated file?)');
+ return false;
+ }
+
+ if ($EOCD = $this->ZIPparseEndOfCentralDirectory()) {
+ $info['zip']['end_central_directory'] = $EOCD;
+ } else {
+ $this->error('No End Of Central Directory entry found (truncated file?)');
+ return false;
+ }
+
+ if (!empty($info['zip']['end_central_directory']['comment'])) {
+ $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
+ }
+
+ return true;
+ }
+
+
+ public function getZIPentriesFilepointer() {
+ $info = &$this->getid3->info;
+
+ $info['zip']['compressed_size'] = 0;
+ $info['zip']['uncompressed_size'] = 0;
+ $info['zip']['entries_count'] = 0;
+
+ rewind($this->getid3->fp);
+ while ($fileentry = $this->ZIPparseLocalFileHeader()) {
+ $info['zip']['entries'][] = $fileentry;
+ $info['zip']['entries_count']++;
+ $info['zip']['compressed_size'] += $fileentry['compressed_size'];
+ $info['zip']['uncompressed_size'] += $fileentry['uncompressed_size'];
+ }
+ if ($info['zip']['entries_count'] == 0) {
+ $this->error('No Local File Header entries found');
+ return false;
+ }
+
+ return true;
+ }
+
+
+ public function ZIPparseLocalFileHeader() {
+ $LocalFileHeader['offset'] = $this->ftell();
+
+ $ZIPlocalFileHeader = $this->fread(30);
+
+ $LocalFileHeader['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4));
+ if ($LocalFileHeader['raw']['signature'] != 0x04034B50) { // "PK\x03\x04"
+ // invalid Local File Header Signature
+ $this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly
+ return false;
+ }
+ $LocalFileHeader['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 4, 2));
+ $LocalFileHeader['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 6, 2));
+ $LocalFileHeader['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 8, 2));
+ $LocalFileHeader['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2));
+ $LocalFileHeader['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2));
+ $LocalFileHeader['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4));
+ $LocalFileHeader['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4));
+ $LocalFileHeader['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4));
+ $LocalFileHeader['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2));
+ $LocalFileHeader['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2));
+
+ $LocalFileHeader['extract_version'] = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10);
+ $LocalFileHeader['host_os'] = $this->ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8);
+ $LocalFileHeader['compression_method'] = $this->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']);
+ $LocalFileHeader['compressed_size'] = $LocalFileHeader['raw']['compressed_size'];
+ $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['raw']['uncompressed_size'];
+ $LocalFileHeader['flags'] = $this->ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']);
+ $LocalFileHeader['last_modified_timestamp'] = $this->DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']);
+
+ $FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] + $LocalFileHeader['raw']['extra_field_length'];
+ if ($FilenameExtrafieldLength > 0) {
+ $ZIPlocalFileHeader .= $this->fread($FilenameExtrafieldLength);
+
+ if ($LocalFileHeader['raw']['filename_length'] > 0) {
+ $LocalFileHeader['filename'] = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']);
+ }
+ if ($LocalFileHeader['raw']['extra_field_length'] > 0) {
+ $LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 + $LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']);
+ }
+ }
+
+ if ($LocalFileHeader['compressed_size'] == 0) {
+ // *Could* be a zero-byte file
+ // But could also be a file written on the fly that didn't know compressed filesize beforehand.
+ // Correct compressed filesize should be in the data_descriptor located after this file data, and also in Central Directory (at end of zip file)
+ if (!empty($this->getid3->info['zip']['central_directory'])) {
+ foreach ($this->getid3->info['zip']['central_directory'] as $central_directory_entry) {
+ if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) {
+ if ($central_directory_entry['compressed_size'] > 0) {
+ // overwrite local zero value (but not ['raw']'compressed_size']) so that seeking for data_descriptor (and next file entry) works correctly
+ $LocalFileHeader['compressed_size'] = $central_directory_entry['compressed_size'];
+ }
+ break;
+ }
+ }
+ }
+
+ }
+ $LocalFileHeader['data_offset'] = $this->ftell();
+ $this->fseek($LocalFileHeader['compressed_size'], SEEK_CUR); // this should (but may not) match value in $LocalFileHeader['raw']['compressed_size'] -- $LocalFileHeader['compressed_size'] could have been overwritten above with value from Central Directory
+
+ if ($LocalFileHeader['flags']['data_descriptor_used']) {
+ $DataDescriptor = $this->fread(16);
+ $LocalFileHeader['data_descriptor']['signature'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 0, 4));
+ if ($LocalFileHeader['data_descriptor']['signature'] != 0x08074B50) { // "PK\x07\x08"
+ $this->getid3->warning[] = 'invalid Local File Header Data Descriptor Signature at offset '.($this->ftell() - 16).' - expecting 08 07 4B 50, found '.getid3_lib::PrintHexBytes($LocalFileHeader['data_descriptor']['signature']);
+ $this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly
+ return false;
+ }
+ $LocalFileHeader['data_descriptor']['crc_32'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 4, 4));
+ $LocalFileHeader['data_descriptor']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 8, 4));
+ $LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 12, 4));
+ if (!$LocalFileHeader['raw']['compressed_size'] && $LocalFileHeader['data_descriptor']['compressed_size']) {
+ foreach ($this->getid3->info['zip']['central_directory'] as $central_directory_entry) {
+ if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) {
+ if ($LocalFileHeader['data_descriptor']['compressed_size'] == $central_directory_entry['compressed_size']) {
+ // $LocalFileHeader['compressed_size'] already set from Central Directory
+ } else {
+ $this->warning('conflicting compressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['compressed_size'].') vs Central Directory ('.$central_directory_entry['compressed_size'].') for file at offset '.$LocalFileHeader['offset']);
+ }
+
+ if ($LocalFileHeader['data_descriptor']['uncompressed_size'] == $central_directory_entry['uncompressed_size']) {
+ $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['data_descriptor']['uncompressed_size'];
+ } else {
+ $this->warning('conflicting uncompressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['uncompressed_size'].') vs Central Directory ('.$central_directory_entry['uncompressed_size'].') for file at offset '.$LocalFileHeader['offset']);
+ }
+ break;
+ }
+ }
+ }
+ }
+ return $LocalFileHeader;
+ }
+
+
+ public function ZIPparseCentralDirectory() {
+ $CentralDirectory['offset'] = $this->ftell();
+
+ $ZIPcentralDirectory = $this->fread(46);
+
+ $CentralDirectory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4));
+ if ($CentralDirectory['raw']['signature'] != 0x02014B50) {
+ // invalid Central Directory Signature
+ $this->fseek($CentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly
+ return false;
+ }
+ $CentralDirectory['raw']['create_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 4, 2));
+ $CentralDirectory['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 6, 2));
+ $CentralDirectory['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 8, 2));
+ $CentralDirectory['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2));
+ $CentralDirectory['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2));
+ $CentralDirectory['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2));
+ $CentralDirectory['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4));
+ $CentralDirectory['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4));
+ $CentralDirectory['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4));
+ $CentralDirectory['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2));
+ $CentralDirectory['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2));
+ $CentralDirectory['raw']['file_comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2));
+ $CentralDirectory['raw']['disk_number_start'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2));
+ $CentralDirectory['raw']['internal_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2));
+ $CentralDirectory['raw']['external_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4));
+ $CentralDirectory['raw']['local_header_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4));
+
+ $CentralDirectory['entry_offset'] = $CentralDirectory['raw']['local_header_offset'];
+ $CentralDirectory['create_version'] = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10);
+ $CentralDirectory['extract_version'] = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10);
+ $CentralDirectory['host_os'] = $this->ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8);
+ $CentralDirectory['compression_method'] = $this->ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']);
+ $CentralDirectory['compressed_size'] = $CentralDirectory['raw']['compressed_size'];
+ $CentralDirectory['uncompressed_size'] = $CentralDirectory['raw']['uncompressed_size'];
+ $CentralDirectory['flags'] = $this->ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']);
+ $CentralDirectory['last_modified_timestamp'] = $this->DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']);
+
+ $FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'] + $CentralDirectory['raw']['file_comment_length'];
+ if ($FilenameExtrafieldCommentLength > 0) {
+ $FilenameExtrafieldComment = $this->fread($FilenameExtrafieldCommentLength);
+
+ if ($CentralDirectory['raw']['filename_length'] > 0) {
+ $CentralDirectory['filename'] = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']);
+ }
+ if ($CentralDirectory['raw']['extra_field_length'] > 0) {
+ $CentralDirectory['raw']['extra_field_data'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']);
+ }
+ if ($CentralDirectory['raw']['file_comment_length'] > 0) {
+ $CentralDirectory['file_comment'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']);
+ }
+ }
+
+ return $CentralDirectory;
+ }
+
+ public function ZIPparseEndOfCentralDirectory() {
+ $EndOfCentralDirectory['offset'] = $this->ftell();
+
+ $ZIPendOfCentralDirectory = $this->fread(22);
+
+ $EndOfCentralDirectory['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4));
+ if ($EndOfCentralDirectory['signature'] != 0x06054B50) {
+ // invalid End Of Central Directory Signature
+ $this->fseek($EndOfCentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly
+ return false;
+ }
+ $EndOfCentralDirectory['disk_number_current'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 4, 2));
+ $EndOfCentralDirectory['disk_number_start_directory'] = getid3_lib::LittleEndian2Int(substr($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);
+ }
+
+}
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