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 /////////////////////////////////////////////////////////////////
11 // module.archive.zip.php //
12 // module for analyzing pkZip files //
13 // dependencies: NONE //
15 /////////////////////////////////////////////////////////////////
17 if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
21 class getid3_zip
extends getid3_handler
26 public function Analyze() {
27 $info = &$this->getid3
->info
;
29 $info['fileformat'] = 'zip';
30 $info['zip']['encoding'] = 'ISO-8859-1';
31 $info['zip']['files'] = array();
33 $info['zip']['compressed_size'] = 0;
34 $info['zip']['uncompressed_size'] = 0;
35 $info['zip']['entries_count'] = 0;
37 if (!getid3_lib
::intValueSupported($info['filesize'])) {
38 $this->error('File is larger than '.round(PHP_INT_MAX
/ 1073741824).'GB, not supported by PHP');
42 $EOCDsearchCounter = 0;
43 while ($EOCDsearchCounter++
< 512) {
45 $this->fseek(-128 * $EOCDsearchCounter, SEEK_END
);
46 $EOCDsearchData = $this->fread(128).$EOCDsearchData;
48 if (strstr($EOCDsearchData, 'PK'."\x05\x06")) {
50 $EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06");
51 $this->fseek((-128 * $EOCDsearchCounter) +
$EOCDposition, SEEK_END
);
52 $info['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory();
54 $this->fseek($info['zip']['end_central_directory']['directory_offset']);
55 $info['zip']['entries_count'] = 0;
56 while ($centraldirectoryentry = $this->ZIPparseCentralDirectory()) {
57 $info['zip']['central_directory'][] = $centraldirectoryentry;
58 $info['zip']['entries_count']++
;
59 $info['zip']['compressed_size'] +
= $centraldirectoryentry['compressed_size'];
60 $info['zip']['uncompressed_size'] +
= $centraldirectoryentry['uncompressed_size'];
62 //if ($centraldirectoryentry['uncompressed_size'] > 0) { zero-byte files are valid
63 if (!empty($centraldirectoryentry['filename'])) {
64 $info['zip']['files'] = getid3_lib
::array_merge_clobber($info['zip']['files'], getid3_lib
::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size']));
68 if ($info['zip']['entries_count'] == 0) {
69 $this->error('No Central Directory entries found (truncated file?)');
73 if (!empty($info['zip']['end_central_directory']['comment'])) {
74 $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
77 if (isset($info['zip']['central_directory'][0]['compression_method'])) {
78 $info['zip']['compression_method'] = $info['zip']['central_directory'][0]['compression_method'];
80 if (isset($info['zip']['central_directory'][0]['flags']['compression_speed'])) {
81 $info['zip']['compression_speed'] = $info['zip']['central_directory'][0]['flags']['compression_speed'];
83 if (isset($info['zip']['compression_method']) && ($info['zip']['compression_method'] == 'store') && !isset($info['zip']['compression_speed'])) {
84 $info['zip']['compression_speed'] = 'store';
87 // secondary check - we (should) already have all the info we NEED from the Central Directory above, but scanning each
88 // Local File Header entry will
89 foreach ($info['zip']['central_directory'] as $central_directory_entry) {
90 $this->fseek($central_directory_entry['entry_offset']);
91 if ($fileentry = $this->ZIPparseLocalFileHeader()) {
92 $info['zip']['entries'][] = $fileentry;
94 $this->warning('Error parsing Local File Header at offset '.$central_directory_entry['entry_offset']);
98 // check for EPUB files
99 if (!empty($info['zip']['entries'][0]['filename']) &&
100 ($info['zip']['entries'][0]['filename'] == 'mimetype') &&
101 ($info['zip']['entries'][0]['compression_method'] == 'store') &&
102 ($info['zip']['entries'][0]['uncompressed_size'] == 20) &&
103 isset($info['zip']['entries'][0]['data_offset'])) {
104 // http://idpf.org/epub/30/spec/epub30-ocf.html
105 // "3.3 OCF ZIP Container Media Type Identification
106 // OCF ZIP Containers must include a mimetype file as the first file in the Container, and the contents of this file must be the MIME type string application/epub+zip.
107 // The contents of the mimetype file must not contain any leading padding or whitespace, must not begin with the Unicode signature (or Byte Order Mark),
108 // and the case of the MIME type string must be exactly as presented above. The mimetype file additionally must be neither compressed nor encrypted,
109 // and there must not be an extra field in its ZIP header."
110 $this->fseek($info['zip']['entries'][0]['data_offset']);
111 if ($this->fread(20) == 'application/epub+zip') {
112 $info['fileformat'] = 'zip.epub';
113 $info['mime_type'] = 'application/epub+zip';
117 // check for Office Open XML files (e.g. .docx, .xlsx)
118 if (!empty($info['zip']['files']['[Content_Types].xml']) &&
119 !empty($info['zip']['files']['_rels']['.rels']) &&
120 !empty($info['zip']['files']['docProps']['app.xml']) &&
121 !empty($info['zip']['files']['docProps']['core.xml'])) {
122 // http://technet.microsoft.com/en-us/library/cc179224.aspx
123 $info['fileformat'] = 'zip.msoffice';
124 if (!empty($ThisFileInfo['zip']['files']['ppt'])) {
125 $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
126 } elseif (!empty($ThisFileInfo['zip']['files']['xl'])) {
127 $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
128 } elseif (!empty($ThisFileInfo['zip']['files']['word'])) {
129 $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
138 if (!$this->getZIPentriesFilepointer()) {
140 $info['fileformat'] = '';
141 $this->error('Cannot find End Of Central Directory (truncated file?)');
145 // central directory couldn't be found and/or parsed
146 // scan through actual file data entries, recover as much as possible from probable trucated file
147 if ($info['zip']['compressed_size'] > ($info['filesize'] - 46 - 22)) {
148 $this->error('Warning: Truncated file! - Total compressed file sizes ('.$info['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($info['filesize'] - 46 - 22).' bytes)');
150 $this->error('Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete');
151 foreach ($info['zip']['entries'] as $key => $valuearray) {
152 $info['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size'];
160 public function getZIPHeaderFilepointerTopDown() {
161 $info = &$this->getid3
->info
;
163 $info['fileformat'] = 'zip';
165 $info['zip']['compressed_size'] = 0;
166 $info['zip']['uncompressed_size'] = 0;
167 $info['zip']['entries_count'] = 0;
169 rewind($this->getid3
->fp
);
170 while ($fileentry = $this->ZIPparseLocalFileHeader()) {
171 $info['zip']['entries'][] = $fileentry;
172 $info['zip']['entries_count']++
;
174 if ($info['zip']['entries_count'] == 0) {
175 $this->error('No Local File Header entries found');
179 $info['zip']['entries_count'] = 0;
180 while ($centraldirectoryentry = $this->ZIPparseCentralDirectory()) {
181 $info['zip']['central_directory'][] = $centraldirectoryentry;
182 $info['zip']['entries_count']++
;
183 $info['zip']['compressed_size'] +
= $centraldirectoryentry['compressed_size'];
184 $info['zip']['uncompressed_size'] +
= $centraldirectoryentry['uncompressed_size'];
186 if ($info['zip']['entries_count'] == 0) {
187 $this->error('No Central Directory entries found (truncated file?)');
191 if ($EOCD = $this->ZIPparseEndOfCentralDirectory()) {
192 $info['zip']['end_central_directory'] = $EOCD;
194 $this->error('No End Of Central Directory entry found (truncated file?)');
198 if (!empty($info['zip']['end_central_directory']['comment'])) {
199 $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
208 public function getZIPentriesFilepointer() {
209 $info = &$this->getid3
->info
;
211 $info['zip']['compressed_size'] = 0;
212 $info['zip']['uncompressed_size'] = 0;
213 $info['zip']['entries_count'] = 0;
215 rewind($this->getid3
->fp
);
216 while ($fileentry = $this->ZIPparseLocalFileHeader()) {
217 $info['zip']['entries'][] = $fileentry;
218 $info['zip']['entries_count']++
;
219 $info['zip']['compressed_size'] +
= $fileentry['compressed_size'];
220 $info['zip']['uncompressed_size'] +
= $fileentry['uncompressed_size'];
222 if ($info['zip']['entries_count'] == 0) {
223 $this->error('No Local File Header entries found');
231 * @return array|false
233 public function ZIPparseLocalFileHeader() {
234 $LocalFileHeader['offset'] = $this->ftell();
236 $ZIPlocalFileHeader = $this->fread(30);
238 $LocalFileHeader['raw']['signature'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4));
239 if ($LocalFileHeader['raw']['signature'] != 0x04034B50) { // "PK\x03\x04"
240 // invalid Local File Header Signature
241 $this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly
244 $LocalFileHeader['raw']['extract_version'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 4, 2));
245 $LocalFileHeader['raw']['general_flags'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 6, 2));
246 $LocalFileHeader['raw']['compression_method'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 8, 2));
247 $LocalFileHeader['raw']['last_mod_file_time'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2));
248 $LocalFileHeader['raw']['last_mod_file_date'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2));
249 $LocalFileHeader['raw']['crc_32'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4));
250 $LocalFileHeader['raw']['compressed_size'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4));
251 $LocalFileHeader['raw']['uncompressed_size'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4));
252 $LocalFileHeader['raw']['filename_length'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2));
253 $LocalFileHeader['raw']['extra_field_length'] = getid3_lib
::LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2));
255 $LocalFileHeader['extract_version'] = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10);
256 $LocalFileHeader['host_os'] = $this->ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8);
257 $LocalFileHeader['compression_method'] = $this->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']);
258 $LocalFileHeader['compressed_size'] = $LocalFileHeader['raw']['compressed_size'];
259 $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['raw']['uncompressed_size'];
260 $LocalFileHeader['flags'] = $this->ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']);
261 $LocalFileHeader['last_modified_timestamp'] = $this->DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']);
263 $FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] +
$LocalFileHeader['raw']['extra_field_length'];
264 if ($FilenameExtrafieldLength > 0) {
265 $ZIPlocalFileHeader .= $this->fread($FilenameExtrafieldLength);
267 if ($LocalFileHeader['raw']['filename_length'] > 0) {
268 $LocalFileHeader['filename'] = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']);
270 if ($LocalFileHeader['raw']['extra_field_length'] > 0) {
271 $LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 +
$LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']);
275 if ($LocalFileHeader['compressed_size'] == 0) {
276 // *Could* be a zero-byte file
277 // But could also be a file written on the fly that didn't know compressed filesize beforehand.
278 // Correct compressed filesize should be in the data_descriptor located after this file data, and also in Central Directory (at end of zip file)
279 if (!empty($this->getid3
->info
['zip']['central_directory'])) {
280 foreach ($this->getid3
->info
['zip']['central_directory'] as $central_directory_entry) {
281 if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) {
282 if ($central_directory_entry['compressed_size'] > 0) {
283 // overwrite local zero value (but not ['raw']'compressed_size']) so that seeking for data_descriptor (and next file entry) works correctly
284 $LocalFileHeader['compressed_size'] = $central_directory_entry['compressed_size'];
292 $LocalFileHeader['data_offset'] = $this->ftell();
293 $this->fseek($LocalFileHeader['compressed_size'], SEEK_CUR
); // this should (but may not) match value in $LocalFileHeader['raw']['compressed_size'] -- $LocalFileHeader['compressed_size'] could have been overwritten above with value from Central Directory
295 if ($LocalFileHeader['flags']['data_descriptor_used']) {
296 $DataDescriptor = $this->fread(16);
297 $LocalFileHeader['data_descriptor']['signature'] = getid3_lib
::LittleEndian2Int(substr($DataDescriptor, 0, 4));
298 if ($LocalFileHeader['data_descriptor']['signature'] != 0x08074B50) { // "PK\x07\x08"
299 $this->getid3
->warning('invalid Local File Header Data Descriptor Signature at offset '.($this->ftell() - 16).' - expecting 08 07 4B 50, found '.getid3_lib
::PrintHexBytes($LocalFileHeader['data_descriptor']['signature']));
300 $this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly
303 $LocalFileHeader['data_descriptor']['crc_32'] = getid3_lib
::LittleEndian2Int(substr($DataDescriptor, 4, 4));
304 $LocalFileHeader['data_descriptor']['compressed_size'] = getid3_lib
::LittleEndian2Int(substr($DataDescriptor, 8, 4));
305 $LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib
::LittleEndian2Int(substr($DataDescriptor, 12, 4));
306 if (!$LocalFileHeader['raw']['compressed_size'] && $LocalFileHeader['data_descriptor']['compressed_size']) {
307 foreach ($this->getid3
->info
['zip']['central_directory'] as $central_directory_entry) {
308 if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) {
309 if ($LocalFileHeader['data_descriptor']['compressed_size'] == $central_directory_entry['compressed_size']) {
310 // $LocalFileHeader['compressed_size'] already set from Central Directory
312 $this->warning('conflicting compressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['compressed_size'].') vs Central Directory ('.$central_directory_entry['compressed_size'].') for file at offset '.$LocalFileHeader['offset']);
315 if ($LocalFileHeader['data_descriptor']['uncompressed_size'] == $central_directory_entry['uncompressed_size']) {
316 $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['data_descriptor']['uncompressed_size'];
318 $this->warning('conflicting uncompressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['uncompressed_size'].') vs Central Directory ('.$central_directory_entry['uncompressed_size'].') for file at offset '.$LocalFileHeader['offset']);
325 return $LocalFileHeader;
329 * @return array|false
331 public function ZIPparseCentralDirectory() {
332 $CentralDirectory['offset'] = $this->ftell();
334 $ZIPcentralDirectory = $this->fread(46);
336 $CentralDirectory['raw']['signature'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4));
337 if ($CentralDirectory['raw']['signature'] != 0x02014B50) {
338 // invalid Central Directory Signature
339 $this->fseek($CentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly
342 $CentralDirectory['raw']['create_version'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 4, 2));
343 $CentralDirectory['raw']['extract_version'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 6, 2));
344 $CentralDirectory['raw']['general_flags'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 8, 2));
345 $CentralDirectory['raw']['compression_method'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2));
346 $CentralDirectory['raw']['last_mod_file_time'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2));
347 $CentralDirectory['raw']['last_mod_file_date'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2));
348 $CentralDirectory['raw']['crc_32'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4));
349 $CentralDirectory['raw']['compressed_size'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4));
350 $CentralDirectory['raw']['uncompressed_size'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4));
351 $CentralDirectory['raw']['filename_length'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2));
352 $CentralDirectory['raw']['extra_field_length'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2));
353 $CentralDirectory['raw']['file_comment_length'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2));
354 $CentralDirectory['raw']['disk_number_start'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2));
355 $CentralDirectory['raw']['internal_file_attrib'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2));
356 $CentralDirectory['raw']['external_file_attrib'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4));
357 $CentralDirectory['raw']['local_header_offset'] = getid3_lib
::LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4));
359 $CentralDirectory['entry_offset'] = $CentralDirectory['raw']['local_header_offset'];
360 $CentralDirectory['create_version'] = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10);
361 $CentralDirectory['extract_version'] = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10);
362 $CentralDirectory['host_os'] = $this->ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8);
363 $CentralDirectory['compression_method'] = $this->ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']);
364 $CentralDirectory['compressed_size'] = $CentralDirectory['raw']['compressed_size'];
365 $CentralDirectory['uncompressed_size'] = $CentralDirectory['raw']['uncompressed_size'];
366 $CentralDirectory['flags'] = $this->ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']);
367 $CentralDirectory['last_modified_timestamp'] = $this->DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']);
369 $FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] +
$CentralDirectory['raw']['extra_field_length'] +
$CentralDirectory['raw']['file_comment_length'];
370 if ($FilenameExtrafieldCommentLength > 0) {
371 $FilenameExtrafieldComment = $this->fread($FilenameExtrafieldCommentLength);
373 if ($CentralDirectory['raw']['filename_length'] > 0) {
374 $CentralDirectory['filename'] = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']);
376 if ($CentralDirectory['raw']['extra_field_length'] > 0) {
377 $CentralDirectory['raw']['extra_field_data'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']);
379 if ($CentralDirectory['raw']['file_comment_length'] > 0) {
380 $CentralDirectory['file_comment'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] +
$CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']);
384 return $CentralDirectory;
388 * @return array|false
390 public function ZIPparseEndOfCentralDirectory() {
391 $EndOfCentralDirectory['offset'] = $this->ftell();
393 $ZIPendOfCentralDirectory = $this->fread(22);
395 $EndOfCentralDirectory['signature'] = getid3_lib
::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4));
396 if ($EndOfCentralDirectory['signature'] != 0x06054B50) {
397 // invalid End Of Central Directory Signature
398 $this->fseek($EndOfCentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly
401 $EndOfCentralDirectory['disk_number_current'] = getid3_lib
::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 4, 2));
402 $EndOfCentralDirectory['disk_number_start_directory'] = getid3_lib
::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 6, 2));
403 $EndOfCentralDirectory['directory_entries_this_disk'] = getid3_lib
::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 8, 2));
404 $EndOfCentralDirectory['directory_entries_total'] = getid3_lib
::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 10, 2));
405 $EndOfCentralDirectory['directory_size'] = getid3_lib
::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 12, 4));
406 $EndOfCentralDirectory['directory_offset'] = getid3_lib
::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 16, 4));
407 $EndOfCentralDirectory['comment_length'] = getid3_lib
::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 20, 2));
409 if ($EndOfCentralDirectory['comment_length'] > 0) {
410 $EndOfCentralDirectory['comment'] = $this->fread($EndOfCentralDirectory['comment_length']);
413 return $EndOfCentralDirectory;
417 * @param int $flagbytes
418 * @param int $compressionmethod
422 public static function ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod) {
423 // https://users.cs.jmu.edu/buchhofp/forensics/formats/pkzip-printable.html
424 $ParsedFlags = array();
425 $ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001);
426 // 0x0002 -- see below
427 // 0x0004 -- see below
428 $ParsedFlags['data_descriptor_used'] = (bool) ($flagbytes & 0x0008);
429 $ParsedFlags['enhanced_deflation'] = (bool) ($flagbytes & 0x0010);
430 $ParsedFlags['compressed_patched_data'] = (bool) ($flagbytes & 0x0020);
431 $ParsedFlags['strong_encryption'] = (bool) ($flagbytes & 0x0040);
436 $ParsedFlags['language_encoding'] = (bool) ($flagbytes & 0x0800);
438 $ParsedFlags['mask_header_values'] = (bool) ($flagbytes & 0x2000);
442 switch ($compressionmethod) {
444 $ParsedFlags['dictionary_size'] = (($flagbytes & 0x0002) ?
8192 : 4096);
445 $ParsedFlags['shannon_fano_trees'] = (($flagbytes & 0x0004) ?
3 : 2);
450 switch (($flagbytes & 0x0006) >> 1) {
452 $ParsedFlags['compression_speed'] = 'normal';
455 $ParsedFlags['compression_speed'] = 'maximum';
458 $ParsedFlags['compression_speed'] = 'fast';
461 $ParsedFlags['compression_speed'] = 'superfast';
475 public static function ZIPversionOSLookup($index) {
476 static $ZIPversionOSLookup = array(
477 0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)',
483 6 => 'OS/2 H.P.F.S.',
487 10 => 'Windows NTFS',
492 15 => 'Alternate MVS',
496 19 => 'OS/X (Darwin)',
499 return (isset($ZIPversionOSLookup[$index]) ?
$ZIPversionOSLookup[$index] : '[unknown]');
507 public static function ZIPcompressionMethodLookup($index) {
508 // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/ZIP.html
509 static $ZIPcompressionMethodLookup = array(
520 10 => 'Imploded (old IBM TERSE)',
521 11 => 'RESERVED[11]',
523 13 => 'RESERVED[13]',
525 15 => 'RESERVED[15]',
526 16 => 'RESERVED[16]',
527 17 => 'RESERVED[17]',
528 18 => 'IBM TERSE (new)',
529 19 => 'IBM LZ77 z Architecture (PFS)',
530 96 => 'JPEG recompressed',
531 97 => 'WavPack compressed',
532 98 => 'PPMd version I, Rev 1',
535 return (isset($ZIPcompressionMethodLookup[$index]) ?
$ZIPcompressionMethodLookup[$index] : '[unknown]');
539 * @param int $DOSdate
540 * @param int $DOStime
544 public static function DOStime2UNIXtime($DOSdate, $DOStime) {
546 // Specifies the MS-DOS date. The date is a packed 16-bit value with the following format:
548 // 0-4 Day of the month (1-31)
549 // 5-8 Month (1 = January, 2 = February, and so on)
550 // 9-15 Year offset from 1980 (add 1980 to get actual year)
552 $UNIXday = ($DOSdate & 0x001F);
553 $UNIXmonth = (($DOSdate & 0x01E0) >> 5);
554 $UNIXyear = (($DOSdate & 0xFE00) >> 9) +
1980;
557 // Specifies the MS-DOS time. The time is a packed 16-bit value with the following format:
559 // 0-4 Second divided by 2
560 // 5-10 Minute (0-59)
561 // 11-15 Hour (0-23 on a 24-hour clock)
563 $UNIXsecond = ($DOStime & 0x001F) * 2;
564 $UNIXminute = (($DOStime & 0x07E0) >> 5);
565 $UNIXhour = (($DOStime & 0xF800) >> 11);
567 return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);