ILIAS  release_5-3 Revision v5.3.23-19-g915713cf615
Public Member Functions | Static Public Member Functions
getid3_zip Class Reference

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...

+ Inheritance diagram for getid3_zip:
+ Collaboration diagram for getid3_zip:

Public Member Functions

 Analyze ()
 
 getZIPHeaderFilepointerTopDown ()
 
 getZIPentriesFilepointer ()
 
 ZIPparseLocalFileHeader ()
 
 ZIPparseCentralDirectory ()
 
 ZIPparseEndOfCentralDirectory ()
 
- Public Member Functions inherited from getid3_handler
 __construct (getID3 $getid3, $call_module=null)
 
 Analyze ()
 
 AnalyzeString ($string)
 
 setStringMode ($string)
 
 saveAttachment ($name, $offset, $length, $image_mime=null)
 

Static Public Member Functions

static ZIPparseGeneralPurposeFlags ($flagbytes, $compressionmethod)
 
static ZIPversionOSLookup ($index)
 
static ZIPcompressionMethodLookup ($index)
 
static DOStime2UNIXtime ($DOSdate, $DOStime)
 

Additional Inherited Members

- Protected Member Functions inherited from getid3_handler
 ftell ()
 
 fread ($bytes)
 
 fseek ($bytes, $whence=SEEK_SET)
 
 feof ()
 
 isDependencyFor ($module)
 
 error ($text)
 
 warning ($text)
 
 notice ($text)
 
- Protected Attributes inherited from getid3_handler
 $getid3
 
 $data_string_flag = false
 
 $data_string = ''
 
 $data_string_position = 0
 
 $data_string_length = 0
 

Detailed Description

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //

Definition at line 18 of file module.archive.zip.php.

Member Function Documentation

◆ Analyze()

getid3_zip::Analyze ( )

Reimplemented from getid3_handler.

Definition at line 21 of file module.archive.zip.php.

21 {
22 $info = &$this->getid3->info;
23
24 $info['fileformat'] = 'zip';
25 $info['zip']['encoding'] = 'ISO-8859-1';
26 $info['zip']['files'] = array();
27
28 $info['zip']['compressed_size'] = 0;
29 $info['zip']['uncompressed_size'] = 0;
30 $info['zip']['entries_count'] = 0;
31
32 if (!getid3_lib::intValueSupported($info['filesize'])) {
33 $this->error('File is larger than '.round(PHP_INT_MAX / 1073741824).'GB, not supported by PHP');
34 return false;
35 } else {
36 $EOCDsearchData = '';
37 $EOCDsearchCounter = 0;
38 while ($EOCDsearchCounter++ < 512) {
39
40 $this->fseek(-128 * $EOCDsearchCounter, SEEK_END);
41 $EOCDsearchData = $this->fread(128).$EOCDsearchData;
42
43 if (strstr($EOCDsearchData, 'PK'."\x05\x06")) {
44
45 $EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06");
46 $this->fseek((-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END);
47 $info['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory();
48
49 $this->fseek($info['zip']['end_central_directory']['directory_offset']);
50 $info['zip']['entries_count'] = 0;
51 while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($this->getid3->fp)) {
52 $info['zip']['central_directory'][] = $centraldirectoryentry;
53 $info['zip']['entries_count']++;
54 $info['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
55 $info['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
56
57 //if ($centraldirectoryentry['uncompressed_size'] > 0) { zero-byte files are valid
58 if (!empty($centraldirectoryentry['filename'])) {
59 $info['zip']['files'] = getid3_lib::array_merge_clobber($info['zip']['files'], getid3_lib::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size']));
60 }
61 }
62
63 if ($info['zip']['entries_count'] == 0) {
64 $this->error('No Central Directory entries found (truncated file?)');
65 return false;
66 }
67
68 if (!empty($info['zip']['end_central_directory']['comment'])) {
69 $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
70 }
71
72 if (isset($info['zip']['central_directory'][0]['compression_method'])) {
73 $info['zip']['compression_method'] = $info['zip']['central_directory'][0]['compression_method'];
74 }
75 if (isset($info['zip']['central_directory'][0]['flags']['compression_speed'])) {
76 $info['zip']['compression_speed'] = $info['zip']['central_directory'][0]['flags']['compression_speed'];
77 }
78 if (isset($info['zip']['compression_method']) && ($info['zip']['compression_method'] == 'store') && !isset($info['zip']['compression_speed'])) {
79 $info['zip']['compression_speed'] = 'store';
80 }
81
82 // secondary check - we (should) already have all the info we NEED from the Central Directory above, but scanning each
83 // Local File Header entry will
84 foreach ($info['zip']['central_directory'] as $central_directory_entry) {
85 $this->fseek($central_directory_entry['entry_offset']);
86 if ($fileentry = $this->ZIPparseLocalFileHeader()) {
87 $info['zip']['entries'][] = $fileentry;
88 } else {
89 $this->warning('Error parsing Local File Header at offset '.$central_directory_entry['entry_offset']);
90 }
91 }
92
93 if (!empty($info['zip']['files']['[Content_Types].xml']) &&
94 !empty($info['zip']['files']['_rels']['.rels']) &&
95 !empty($info['zip']['files']['docProps']['app.xml']) &&
96 !empty($info['zip']['files']['docProps']['core.xml'])) {
97 // http://technet.microsoft.com/en-us/library/cc179224.aspx
98 $info['fileformat'] = 'zip.msoffice';
99 if (!empty($ThisFileInfo['zip']['files']['ppt'])) {
100 $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
101 } elseif (!empty($ThisFileInfo['zip']['files']['xl'])) {
102 $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
103 } elseif (!empty($ThisFileInfo['zip']['files']['word'])) {
104 $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
105 }
106 }
107
108 return true;
109 }
110 }
111 }
112
113 if (!$this->getZIPentriesFilepointer()) {
114 unset($info['zip']);
115 $info['fileformat'] = '';
116 $this->error('Cannot find End Of Central Directory (truncated file?)');
117 return false;
118 }
119
120 // central directory couldn't be found and/or parsed
121 // scan through actual file data entries, recover as much as possible from probable trucated file
122 if ($info['zip']['compressed_size'] > ($info['filesize'] - 46 - 22)) {
123 $this->error('Warning: Truncated file! - Total compressed file sizes ('.$info['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($info['filesize'] - 46 - 22).' bytes)');
124 }
125 $this->error('Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete');
126 foreach ($info['zip']['entries'] as $key => $valuearray) {
127 $info['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size'];
128 }
129 return true;
130 }
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1711
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1683
getid3_handler\warning
warning($text)
Definition: getid3.php:1758
getid3_handler\error
error($text)
Definition: getid3.php:1752
getid3_lib\CreateDeepArray
static CreateDeepArray($ArrayPath, $Separator, $Value)
Definition: getid3.lib.php:491
getid3_lib\intValueSupported
static intValueSupported($num)
Definition: getid3.lib.php:80
getid3_lib\array_merge_clobber
static array_merge_clobber($array1, $array2)
Definition: getid3.lib.php:384
getid3_zip\ZIPparseCentralDirectory
ZIPparseCentralDirectory()
Definition: module.archive.zip.php:298
getid3_zip\ZIPparseEndOfCentralDirectory
ZIPparseEndOfCentralDirectory()
Definition: module.archive.zip.php:354
getid3_zip\getZIPentriesFilepointer
getZIPentriesFilepointer()
Definition: module.archive.zip.php:179
getid3_zip\ZIPparseLocalFileHeader
ZIPparseLocalFileHeader()
Definition: module.archive.zip.php:202
$key
$key
Definition: croninfo.php:18
$info
$info
Definition: index.php:5

References $info, $key, getid3_lib\array_merge_clobber(), getid3_lib\CreateDeepArray(), getid3_handler\error(), getid3_handler\fread(), getid3_handler\fseek(), getZIPentriesFilepointer(), getid3_lib\intValueSupported(), getid3_handler\warning(), ZIPparseCentralDirectory(), ZIPparseEndOfCentralDirectory(), and ZIPparseLocalFileHeader().

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◆ DOStime2UNIXtime()

static getid3_zip::DOStime2UNIXtime (   $DOSdate,
  $DOStime 
)
static

Definition at line 487 of file module.archive.zip.php.

487 {
488 // wFatDate
489 // Specifies the MS-DOS date. The date is a packed 16-bit value with the following format:
490 // Bits Contents
491 // 0-4 Day of the month (1-31)
492 // 5-8 Month (1 = January, 2 = February, and so on)
493 // 9-15 Year offset from 1980 (add 1980 to get actual year)
494
495 $UNIXday = ($DOSdate & 0x001F);
496 $UNIXmonth = (($DOSdate & 0x01E0) >> 5);
497 $UNIXyear = (($DOSdate & 0xFE00) >> 9) + 1980;
498
499 // wFatTime
500 // Specifies the MS-DOS time. The time is a packed 16-bit value with the following format:
501 // Bits Contents
502 // 0-4 Second divided by 2
503 // 5-10 Minute (0-59)
504 // 11-15 Hour (0-23 on a 24-hour clock)
505
506 $UNIXsecond = ($DOStime & 0x001F) * 2;
507 $UNIXminute = (($DOStime & 0x07E0) >> 5);
508 $UNIXhour = (($DOStime & 0xF800) >> 11);
509
510 return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
511 }

Referenced by ZIPparseCentralDirectory(), and ZIPparseLocalFileHeader().

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◆ getZIPentriesFilepointer()

getid3_zip::getZIPentriesFilepointer ( )

Definition at line 179 of file module.archive.zip.php.

179 {
180 $info = &$this->getid3->info;
181
182 $info['zip']['compressed_size'] = 0;
183 $info['zip']['uncompressed_size'] = 0;
184 $info['zip']['entries_count'] = 0;
185
186 rewind($this->getid3->fp);
187 while ($fileentry = $this->ZIPparseLocalFileHeader()) {
188 $info['zip']['entries'][] = $fileentry;
189 $info['zip']['entries_count']++;
190 $info['zip']['compressed_size'] += $fileentry['compressed_size'];
191 $info['zip']['uncompressed_size'] += $fileentry['uncompressed_size'];
192 }
193 if ($info['zip']['entries_count'] == 0) {
194 $this->error('No Local File Header entries found');
195 return false;
196 }
197
198 return true;
199 }

References $info, getid3_handler\error(), and ZIPparseLocalFileHeader().

Referenced by Analyze().

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◆ getZIPHeaderFilepointerTopDown()

getid3_zip::getZIPHeaderFilepointerTopDown ( )

Definition at line 133 of file module.archive.zip.php.

133 {
134 $info = &$this->getid3->info;
135
136 $info['fileformat'] = 'zip';
137
138 $info['zip']['compressed_size'] = 0;
139 $info['zip']['uncompressed_size'] = 0;
140 $info['zip']['entries_count'] = 0;
141
142 rewind($this->getid3->fp);
143 while ($fileentry = $this->ZIPparseLocalFileHeader()) {
144 $info['zip']['entries'][] = $fileentry;
145 $info['zip']['entries_count']++;
146 }
147 if ($info['zip']['entries_count'] == 0) {
148 $this->error('No Local File Header entries found');
149 return false;
150 }
151
152 $info['zip']['entries_count'] = 0;
153 while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($this->getid3->fp)) {
154 $info['zip']['central_directory'][] = $centraldirectoryentry;
155 $info['zip']['entries_count']++;
156 $info['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
157 $info['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
158 }
159 if ($info['zip']['entries_count'] == 0) {
160 $this->error('No Central Directory entries found (truncated file?)');
161 return false;
162 }
163
164 if ($EOCD = $this->ZIPparseEndOfCentralDirectory()) {
165 $info['zip']['end_central_directory'] = $EOCD;
166 } else {
167 $this->error('No End Of Central Directory entry found (truncated file?)');
168 return false;
169 }
170
171 if (!empty($info['zip']['end_central_directory']['comment'])) {
172 $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
173 }
174
175 return true;
176 }

References $info, getid3_handler\error(), ZIPparseCentralDirectory(), ZIPparseEndOfCentralDirectory(), and ZIPparseLocalFileHeader().

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◆ ZIPcompressionMethodLookup()

static getid3_zip::ZIPcompressionMethodLookup (   $index)
static

Definition at line 456 of file module.archive.zip.php.

456 {
457 // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/ZIP.html
458 static $ZIPcompressionMethodLookup = array(
459 0 => 'store',
460 1 => 'shrink',
461 2 => 'reduce-1',
462 3 => 'reduce-2',
463 4 => 'reduce-3',
464 5 => 'reduce-4',
465 6 => 'implode',
466 7 => 'tokenize',
467 8 => 'deflate',
468 9 => 'deflate64',
469 10 => 'Imploded (old IBM TERSE)',
470 11 => 'RESERVED[11]',
471 12 => 'BZIP2',
472 13 => 'RESERVED[13]',
473 14 => 'LZMA (EFS)',
474 15 => 'RESERVED[15]',
475 16 => 'RESERVED[16]',
476 17 => 'RESERVED[17]',
477 18 => 'IBM TERSE (new)',
478 19 => 'IBM LZ77 z Architecture (PFS)',
479 96 => 'JPEG recompressed',
480 97 => 'WavPack compressed',
481 98 => 'PPMd version I, Rev 1',
482 );
483
484 return (isset($ZIPcompressionMethodLookup[$index]) ? $ZIPcompressionMethodLookup[$index] : '[unknown]');
485 }
$index
$index
Definition: metadata.php:60

References $index.

Referenced by ZIPparseCentralDirectory(), and ZIPparseLocalFileHeader().

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◆ ZIPparseCentralDirectory()

getid3_zip::ZIPparseCentralDirectory ( )

Definition at line 298 of file module.archive.zip.php.

298 {
299 $CentralDirectory['offset'] = $this->ftell();
300
301 $ZIPcentralDirectory = $this->fread(46);
302
303 $CentralDirectory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4));
304 if ($CentralDirectory['raw']['signature'] != 0x02014B50) {
305 // invalid Central Directory Signature
306 $this->fseek($CentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly
307 return false;
308 }
309 $CentralDirectory['raw']['create_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 4, 2));
310 $CentralDirectory['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 6, 2));
311 $CentralDirectory['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 8, 2));
312 $CentralDirectory['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2));
313 $CentralDirectory['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2));
314 $CentralDirectory['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2));
315 $CentralDirectory['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4));
316 $CentralDirectory['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4));
317 $CentralDirectory['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4));
318 $CentralDirectory['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2));
319 $CentralDirectory['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2));
320 $CentralDirectory['raw']['file_comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2));
321 $CentralDirectory['raw']['disk_number_start'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2));
322 $CentralDirectory['raw']['internal_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2));
323 $CentralDirectory['raw']['external_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4));
324 $CentralDirectory['raw']['local_header_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4));
325
326 $CentralDirectory['entry_offset'] = $CentralDirectory['raw']['local_header_offset'];
327 $CentralDirectory['create_version'] = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10);
328 $CentralDirectory['extract_version'] = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10);
329 $CentralDirectory['host_os'] = $this->ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8);
330 $CentralDirectory['compression_method'] = $this->ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']);
331 $CentralDirectory['compressed_size'] = $CentralDirectory['raw']['compressed_size'];
332 $CentralDirectory['uncompressed_size'] = $CentralDirectory['raw']['uncompressed_size'];
333 $CentralDirectory['flags'] = $this->ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']);
334 $CentralDirectory['last_modified_timestamp'] = $this->DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']);
335
336 $FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'] + $CentralDirectory['raw']['file_comment_length'];
337 if ($FilenameExtrafieldCommentLength > 0) {
338 $FilenameExtrafieldComment = $this->fread($FilenameExtrafieldCommentLength);
339
340 if ($CentralDirectory['raw']['filename_length'] > 0) {
341 $CentralDirectory['filename'] = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']);
342 }
343 if ($CentralDirectory['raw']['extra_field_length'] > 0) {
344 $CentralDirectory['raw']['extra_field_data'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']);
345 }
346 if ($CentralDirectory['raw']['file_comment_length'] > 0) {
347 $CentralDirectory['file_comment'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']);
348 }
349 }
350
351 return $CentralDirectory;
352 }
sprintf
sprintf('%.4f', $callTime)
Definition: 01pharSimple.php:87
getid3_handler\ftell
ftell()
Definition: getid3.php:1676
getid3_lib\LittleEndian2Int
static LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:292
getid3_zip\DOStime2UNIXtime
static DOStime2UNIXtime($DOSdate, $DOStime)
Definition: module.archive.zip.php:487
getid3_zip\ZIPcompressionMethodLookup
static ZIPcompressionMethodLookup($index)
Definition: module.archive.zip.php:456
getid3_zip\ZIPversionOSLookup
static ZIPversionOSLookup($index)
Definition: module.archive.zip.php:429
getid3_zip\ZIPparseGeneralPurposeFlags
static ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod)
Definition: module.archive.zip.php:381

References DOStime2UNIXtime(), getid3_handler\fread(), getid3_handler\fseek(), getid3_handler\ftell(), getid3_lib\LittleEndian2Int(), sprintf, ZIPcompressionMethodLookup(), ZIPparseGeneralPurposeFlags(), and ZIPversionOSLookup().

Referenced by Analyze(), and getZIPHeaderFilepointerTopDown().

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◆ ZIPparseEndOfCentralDirectory()

getid3_zip::ZIPparseEndOfCentralDirectory ( )

Definition at line 354 of file module.archive.zip.php.

354 {
355 $EndOfCentralDirectory['offset'] = $this->ftell();
356
357 $ZIPendOfCentralDirectory = $this->fread(22);
358
359 $EndOfCentralDirectory['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4));
360 if ($EndOfCentralDirectory['signature'] != 0x06054B50) {
361 // invalid End Of Central Directory Signature
362 $this->fseek($EndOfCentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly
363 return false;
364 }
365 $EndOfCentralDirectory['disk_number_current'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 4, 2));
366 $EndOfCentralDirectory['disk_number_start_directory'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 6, 2));
367 $EndOfCentralDirectory['directory_entries_this_disk'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 8, 2));
368 $EndOfCentralDirectory['directory_entries_total'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 10, 2));
369 $EndOfCentralDirectory['directory_size'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 12, 4));
370 $EndOfCentralDirectory['directory_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 16, 4));
371 $EndOfCentralDirectory['comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 20, 2));
372
373 if ($EndOfCentralDirectory['comment_length'] > 0) {
374 $EndOfCentralDirectory['comment'] = $this->fread($EndOfCentralDirectory['comment_length']);
375 }
376
377 return $EndOfCentralDirectory;
378 }

References getid3_handler\fread(), getid3_handler\fseek(), getid3_handler\ftell(), and getid3_lib\LittleEndian2Int().

Referenced by Analyze(), and getZIPHeaderFilepointerTopDown().

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◆ ZIPparseGeneralPurposeFlags()

static getid3_zip::ZIPparseGeneralPurposeFlags (   $flagbytes,
  $compressionmethod 
)
static

Definition at line 381 of file module.archive.zip.php.

381 {
382 // https://users.cs.jmu.edu/buchhofp/forensics/formats/pkzip-printable.html
383 $ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001);
384 // 0x0002 -- see below
385 // 0x0004 -- see below
386 $ParsedFlags['data_descriptor_used'] = (bool) ($flagbytes & 0x0008);
387 $ParsedFlags['enhanced_deflation'] = (bool) ($flagbytes & 0x0010);
388 $ParsedFlags['compressed_patched_data'] = (bool) ($flagbytes & 0x0020);
389 $ParsedFlags['strong_encryption'] = (bool) ($flagbytes & 0x0040);
390 // 0x0080 - unused
391 // 0x0100 - unused
392 // 0x0200 - unused
393 // 0x0400 - unused
394 $ParsedFlags['language_encoding'] = (bool) ($flagbytes & 0x0800);
395 // 0x1000 - reserved
396 $ParsedFlags['mask_header_values'] = (bool) ($flagbytes & 0x2000);
397 // 0x4000 - reserved
398 // 0x8000 - reserved
399
400 switch ($compressionmethod) {
401 case 6:
402 $ParsedFlags['dictionary_size'] = (($flagbytes & 0x0002) ? 8192 : 4096);
403 $ParsedFlags['shannon_fano_trees'] = (($flagbytes & 0x0004) ? 3 : 2);
404 break;
405
406 case 8:
407 case 9:
408 switch (($flagbytes & 0x0006) >> 1) {
409 case 0:
410 $ParsedFlags['compression_speed'] = 'normal';
411 break;
412 case 1:
413 $ParsedFlags['compression_speed'] = 'maximum';
414 break;
415 case 2:
416 $ParsedFlags['compression_speed'] = 'fast';
417 break;
418 case 3:
419 $ParsedFlags['compression_speed'] = 'superfast';
420 break;
421 }
422 break;
423 }
424
425 return $ParsedFlags;
426 }

Referenced by ZIPparseCentralDirectory(), and ZIPparseLocalFileHeader().

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◆ ZIPparseLocalFileHeader()

getid3_zip::ZIPparseLocalFileHeader ( )

Definition at line 202 of file module.archive.zip.php.

202 {
203 $LocalFileHeader['offset'] = $this->ftell();
204
205 $ZIPlocalFileHeader = $this->fread(30);
206
207 $LocalFileHeader['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4));
208 if ($LocalFileHeader['raw']['signature'] != 0x04034B50) { // "PK\x03\x04"
209 // invalid Local File Header Signature
210 $this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly
211 return false;
212 }
213 $LocalFileHeader['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 4, 2));
214 $LocalFileHeader['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 6, 2));
215 $LocalFileHeader['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 8, 2));
216 $LocalFileHeader['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2));
217 $LocalFileHeader['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2));
218 $LocalFileHeader['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4));
219 $LocalFileHeader['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4));
220 $LocalFileHeader['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4));
221 $LocalFileHeader['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2));
222 $LocalFileHeader['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2));
223
224 $LocalFileHeader['extract_version'] = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10);
225 $LocalFileHeader['host_os'] = $this->ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8);
226 $LocalFileHeader['compression_method'] = $this->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']);
227 $LocalFileHeader['compressed_size'] = $LocalFileHeader['raw']['compressed_size'];
228 $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['raw']['uncompressed_size'];
229 $LocalFileHeader['flags'] = $this->ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']);
230 $LocalFileHeader['last_modified_timestamp'] = $this->DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']);
231
232 $FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] + $LocalFileHeader['raw']['extra_field_length'];
233 if ($FilenameExtrafieldLength > 0) {
234 $ZIPlocalFileHeader .= $this->fread($FilenameExtrafieldLength);
235
236 if ($LocalFileHeader['raw']['filename_length'] > 0) {
237 $LocalFileHeader['filename'] = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']);
238 }
239 if ($LocalFileHeader['raw']['extra_field_length'] > 0) {
240 $LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 + $LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']);
241 }
242 }
243
244 if ($LocalFileHeader['compressed_size'] == 0) {
245 // *Could* be a zero-byte file
246 // But could also be a file written on the fly that didn't know compressed filesize beforehand.
247 // Correct compressed filesize should be in the data_descriptor located after this file data, and also in Central Directory (at end of zip file)
248 if (!empty($this->getid3->info['zip']['central_directory'])) {
249 foreach ($this->getid3->info['zip']['central_directory'] as $central_directory_entry) {
250 if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) {
251 if ($central_directory_entry['compressed_size'] > 0) {
252 // overwrite local zero value (but not ['raw']'compressed_size']) so that seeking for data_descriptor (and next file entry) works correctly
253 $LocalFileHeader['compressed_size'] = $central_directory_entry['compressed_size'];
254 }
255 break;
256 }
257 }
258 }
259
260 }
261 $LocalFileHeader['data_offset'] = $this->ftell();
262 $this->fseek($LocalFileHeader['compressed_size'], SEEK_CUR); // this should (but may not) match value in $LocalFileHeader['raw']['compressed_size'] -- $LocalFileHeader['compressed_size'] could have been overwritten above with value from Central Directory
263
264 if ($LocalFileHeader['flags']['data_descriptor_used']) {
265 $DataDescriptor = $this->fread(16);
266 $LocalFileHeader['data_descriptor']['signature'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 0, 4));
267 if ($LocalFileHeader['data_descriptor']['signature'] != 0x08074B50) { // "PK\x07\x08"
268 $this->getid3->warning[] = 'invalid Local File Header Data Descriptor Signature at offset '.($this->ftell() - 16).' - expecting 08 07 4B 50, found '.getid3_lib::PrintHexBytes($LocalFileHeader['data_descriptor']['signature']);
269 $this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly
270 return false;
271 }
272 $LocalFileHeader['data_descriptor']['crc_32'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 4, 4));
273 $LocalFileHeader['data_descriptor']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 8, 4));
274 $LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 12, 4));
275 if (!$LocalFileHeader['raw']['compressed_size'] && $LocalFileHeader['data_descriptor']['compressed_size']) {
276 foreach ($this->getid3->info['zip']['central_directory'] as $central_directory_entry) {
277 if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) {
278 if ($LocalFileHeader['data_descriptor']['compressed_size'] == $central_directory_entry['compressed_size']) {
279 // $LocalFileHeader['compressed_size'] already set from Central Directory
280 } else {
281 $this->warning('conflicting compressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['compressed_size'].') vs Central Directory ('.$central_directory_entry['compressed_size'].') for file at offset '.$LocalFileHeader['offset']);
282 }
283
284 if ($LocalFileHeader['data_descriptor']['uncompressed_size'] == $central_directory_entry['uncompressed_size']) {
285 $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['data_descriptor']['uncompressed_size'];
286 } else {
287 $this->warning('conflicting uncompressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['uncompressed_size'].') vs Central Directory ('.$central_directory_entry['uncompressed_size'].') for file at offset '.$LocalFileHeader['offset']);
288 }
289 break;
290 }
291 }
292 }
293 }
294 return $LocalFileHeader;
295 }
getid3_lib\PrintHexBytes
static PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8')
Definition: getid3.lib.php:18

References DOStime2UNIXtime(), getid3_handler\fread(), getid3_handler\fseek(), getid3_handler\ftell(), getid3_lib\LittleEndian2Int(), getid3_lib\PrintHexBytes(), sprintf, getid3_handler\warning(), ZIPcompressionMethodLookup(), ZIPparseGeneralPurposeFlags(), and ZIPversionOSLookup().

Referenced by Analyze(), getZIPentriesFilepointer(), and getZIPHeaderFilepointerTopDown().

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◆ ZIPversionOSLookup()

static getid3_zip::ZIPversionOSLookup (   $index)
static

Definition at line 429 of file module.archive.zip.php.

429 {
430 static $ZIPversionOSLookup = array(
431 0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)',
432 1 => 'Amiga',
433 2 => 'OpenVMS',
434 3 => 'Unix',
435 4 => 'VM/CMS',
436 5 => 'Atari ST',
437 6 => 'OS/2 H.P.F.S.',
438 7 => 'Macintosh',
439 8 => 'Z-System',
440 9 => 'CP/M',
441 10 => 'Windows NTFS',
442 11 => 'MVS',
443 12 => 'VSE',
444 13 => 'Acorn Risc',
445 14 => 'VFAT',
446 15 => 'Alternate MVS',
447 16 => 'BeOS',
448 17 => 'Tandem',
449 18 => 'OS/400',
450 19 => 'OS/X (Darwin)',
451 );
452
453 return (isset($ZIPversionOSLookup[$index]) ? $ZIPversionOSLookup[$index] : '[unknown]');
454 }

References $index.

Referenced by ZIPparseCentralDirectory(), and ZIPparseLocalFileHeader().

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The documentation for this class was generated from the following file: