ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
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

 getid3_zip (&$fd, &$ThisFileInfo)
 
 getZIPHeaderFilepointerTopDown (&$fd, &$ThisFileInfo)
 
 getZIPentriesFilepointer (&$fd, &$ThisFileInfo)
 
 ZIPparseLocalFileHeader (&$fd)
 
 ZIPparseCentralDirectory (&$fd)
 
 ZIPparseEndOfCentralDirectory (&$fd)
 
 ZIPparseGeneralPurposeFlags ($flagbytes, $compressionmethod)
 
 ZIPversionOSLookup ($index)
 
 ZIPcompressionMethodLookup ($index)
 
 DOStime2UNIXtime ($DOSdate, $DOStime)
 
 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 17 of file module.archive.zip.php.

Member Function Documentation

◆ Analyze()

getid3_zip::Analyze ( )

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

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

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  $info['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  $info['error'][] = 'No Central Directory entries found (truncated file?)';
65  return false;
66  }
67 
68  if (!empty($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  $info['warning'][] = 'Error parsing Local File Header at offset '.$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  $info['error'][] = 'Cannot find End Of Central Directory (truncated file?)';
117  return false;
118  }
119 
120  // central directory couldn't be found and/or parsed
121  // scan through actual file data entries, recover as much as possible from probable trucated file
122  if ($info['zip']['compressed_size'] > ($info['filesize'] - 46 - 22)) {
123  $info['error'][] = 'Warning: Truncated file! - Total compressed file sizes ('.$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  $info['error'][] = 'Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete';
126  foreach ($info['zip']['entries'] as $key => $valuearray) {
127  $info['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size'];
128  }
129  return true;
130  }
getid3_lib\intValueSupported
static intValueSupported($num)
Definition: getid3.lib.php:80
getid3_lib\array_merge_clobber
array_merge_clobber($array1, $array2)
Definition: getid3.lib.php:358
getid3_zip\ZIPparseEndOfCentralDirectory
ZIPparseEndOfCentralDirectory()
Definition: module.archive.zip.php:354
$info
$info
Definition: example_052.php:80
getid3_zip\ZIPparseLocalFileHeader
ZIPparseLocalFileHeader()
Definition: module.archive.zip.php:202
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_lib\CreateDeepArray
CreateDeepArray($ArrayPath, $Separator, $Value)
Definition: getid3.lib.php:465
getid3_zip\getZIPentriesFilepointer
getZIPentriesFilepointer()
Definition: module.archive.zip.php:179
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_zip\ZIPparseCentralDirectory
ZIPparseCentralDirectory()
Definition: module.archive.zip.php:298
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◆ DOStime2UNIXtime() [1/2]

getid3_zip::DOStime2UNIXtime (   $DOSdate,
  $DOStime 
)

Definition at line 386 of file module.archive.zip.php.

Referenced by ZIPparseCentralDirectory(), and ZIPparseLocalFileHeader().

386  {
387  // wFatDate
388  // Specifies the MS-DOS date. The date is a packed 16-bit value with the following format:
389  // Bits Contents
390  // 0-4 Day of the month (1-31)
391  // 5-8 Month (1 = January, 2 = February, and so on)
392  // 9-15 Year offset from 1980 (add 1980 to get actual year)
393 
394  $UNIXday = ($DOSdate & 0x001F);
395  $UNIXmonth = (($DOSdate & 0x01E0) >> 5);
396  $UNIXyear = (($DOSdate & 0xFE00) >> 9) + 1980;
397 
398  // wFatTime
399  // Specifies the MS-DOS time. The time is a packed 16-bit value with the following format:
400  // Bits Contents
401  // 0-4 Second divided by 2
402  // 5-10 Minute (0-59)
403  // 11-15 Hour (0-23 on a 24-hour clock)
404 
405  $UNIXsecond = ($DOStime & 0x001F) * 2;
406  $UNIXminute = (($DOStime & 0x07E0) >> 5);
407  $UNIXhour = (($DOStime & 0xF800) >> 11);
408 
409  return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
410  }
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◆ DOStime2UNIXtime() [2/2]

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  }

◆ getid3_zip()

getid3_zip::getid3_zip ( &  $fd,
&  $ThisFileInfo 
)

Definition at line 20 of file module.archive.zip.php.

References getid3_lib\array_merge_clobber(), getid3_lib\CreateDeepArray(), getid3_handler\fread(), getid3_handler\fseek(), getZIPentriesFilepointer(), ZIPparseCentralDirectory(), and ZIPparseEndOfCentralDirectory().

20  {
21 
22  $ThisFileInfo['fileformat'] = 'zip';
23  $ThisFileInfo['zip']['encoding'] = 'ISO-8859-1';
24  $ThisFileInfo['zip']['files'] = array();
25 
26  $ThisFileInfo['zip']['compressed_size'] = 0;
27  $ThisFileInfo['zip']['uncompressed_size'] = 0;
28  $ThisFileInfo['zip']['entries_count'] = 0;
29 
30  $EOCDsearchData = '';
31  $EOCDsearchCounter = 0;
32  while ($EOCDsearchCounter++ < 512) {
33 
34  fseek($fd, -128 * $EOCDsearchCounter, SEEK_END);
35  $EOCDsearchData = fread($fd, 128).$EOCDsearchData;
36 
37  if (strstr($EOCDsearchData, 'PK'."\x05\x06")) {
38 
39  $EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06");
40  fseek($fd, (-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END);
41  $ThisFileInfo['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory($fd);
42 
43  fseek($fd, $ThisFileInfo['zip']['end_central_directory']['directory_offset'], SEEK_SET);
44  $ThisFileInfo['zip']['entries_count'] = 0;
45  while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($fd)) {
46  $ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry;
47  $ThisFileInfo['zip']['entries_count']++;
48  $ThisFileInfo['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
49  $ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
50 
51  if ($centraldirectoryentry['uncompressed_size'] > 0) {
52  $ThisFileInfo['zip']['files'] = getid3_lib::array_merge_clobber($ThisFileInfo['zip']['files'], getid3_lib::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size']));
53  }
54  }
55 
56  if ($ThisFileInfo['zip']['entries_count'] == 0) {
57  $ThisFileInfo['error'][] = 'No Central Directory entries found (truncated file?)';
58  return false;
59  }
60 
61  if (!empty($ThisFileInfo['zip']['end_central_directory']['comment'])) {
62  $ThisFileInfo['zip']['comments']['comment'][] = $ThisFileInfo['zip']['end_central_directory']['comment'];
63  }
64 
65  if (isset($ThisFileInfo['zip']['central_directory'][0]['compression_method'])) {
66  $ThisFileInfo['zip']['compression_method'] = $ThisFileInfo['zip']['central_directory'][0]['compression_method'];
67  }
68  if (isset($ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'])) {
69  $ThisFileInfo['zip']['compression_speed'] = $ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'];
70  }
71  if (isset($ThisFileInfo['zip']['compression_method']) && ($ThisFileInfo['zip']['compression_method'] == 'store') && !isset($ThisFileInfo['zip']['compression_speed'])) {
72  $ThisFileInfo['zip']['compression_speed'] = 'store';
73  }
74 
75  return true;
76 
77  }
78 
79  }
80 
81  if ($this->getZIPentriesFilepointer($fd, $ThisFileInfo)) {
82 
83  // central directory couldn't be found and/or parsed
84  // scan through actual file data entries, recover as much as possible from probable trucated file
85  if ($ThisFileInfo['zip']['compressed_size'] > ($ThisFileInfo['filesize'] - 46 - 22)) {
86  $ThisFileInfo['error'][] = 'Warning: Truncated file! - Total compressed file sizes ('.$ThisFileInfo['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($ThisFileInfo['filesize'] - 46 - 22).' bytes)';
87  }
88  $ThisFileInfo['error'][] = 'Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete';
89  foreach ($ThisFileInfo['zip']['entries'] as $key => $valuearray) {
90  $ThisFileInfo['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size'];
91  }
92  return true;
93 
94  } else {
95 
96  unset($ThisFileInfo['zip']);
97  $ThisFileInfo['fileformat'] = '';
98  $ThisFileInfo['error'][] = 'Cannot find End Of Central Directory (truncated file?)';
99  return false;
100 
101  }
102  }
getid3_lib\array_merge_clobber
array_merge_clobber($array1, $array2)
Definition: getid3.lib.php:358
getid3_zip\ZIPparseEndOfCentralDirectory
ZIPparseEndOfCentralDirectory()
Definition: module.archive.zip.php:354
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_lib\CreateDeepArray
CreateDeepArray($ArrayPath, $Separator, $Value)
Definition: getid3.lib.php:465
getid3_zip\getZIPentriesFilepointer
getZIPentriesFilepointer()
Definition: module.archive.zip.php:179
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_zip\ZIPparseCentralDirectory
ZIPparseCentralDirectory()
Definition: module.archive.zip.php:298
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◆ getZIPentriesFilepointer() [1/2]

getid3_zip::getZIPentriesFilepointer ( &  $fd,
&  $ThisFileInfo 
)

Definition at line 149 of file module.archive.zip.php.

References ZIPparseLocalFileHeader().

149  {
150  $ThisFileInfo['zip']['compressed_size'] = 0;
151  $ThisFileInfo['zip']['uncompressed_size'] = 0;
152  $ThisFileInfo['zip']['entries_count'] = 0;
153 
154  rewind($fd);
155  while ($fileentry = $this->ZIPparseLocalFileHeader($fd)) {
156  $ThisFileInfo['zip']['entries'][] = $fileentry;
157  $ThisFileInfo['zip']['entries_count']++;
158  $ThisFileInfo['zip']['compressed_size'] += $fileentry['compressed_size'];
159  $ThisFileInfo['zip']['uncompressed_size'] += $fileentry['uncompressed_size'];
160  }
161  if ($ThisFileInfo['zip']['entries_count'] == 0) {
162  $ThisFileInfo['error'][] = 'No Local File Header entries found';
163  return false;
164  }
165 
166  return true;
167  }
getid3_zip\ZIPparseLocalFileHeader
ZIPparseLocalFileHeader()
Definition: module.archive.zip.php:202
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◆ getZIPentriesFilepointer() [2/2]

getid3_zip::getZIPentriesFilepointer ( )

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

References $info, and ZIPparseLocalFileHeader().

Referenced by Analyze(), and getid3_zip().

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  $info['error'][] = 'No Local File Header entries found';
195  return false;
196  }
197 
198  return true;
199  }
$info
$info
Definition: example_052.php:80
getid3_zip\ZIPparseLocalFileHeader
ZIPparseLocalFileHeader()
Definition: module.archive.zip.php:202
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◆ getZIPHeaderFilepointerTopDown() [1/2]

getid3_zip::getZIPHeaderFilepointerTopDown ( &  $fd,
&  $ThisFileInfo 
)

Definition at line 105 of file module.archive.zip.php.

References ZIPparseCentralDirectory(), ZIPparseEndOfCentralDirectory(), and ZIPparseLocalFileHeader().

105  {
106  $ThisFileInfo['fileformat'] = 'zip';
107 
108  $ThisFileInfo['zip']['compressed_size'] = 0;
109  $ThisFileInfo['zip']['uncompressed_size'] = 0;
110  $ThisFileInfo['zip']['entries_count'] = 0;
111 
112  rewind($fd);
113  while ($fileentry = $this->ZIPparseLocalFileHeader($fd)) {
114  $ThisFileInfo['zip']['entries'][] = $fileentry;
115  $ThisFileInfo['zip']['entries_count']++;
116  }
117  if ($ThisFileInfo['zip']['entries_count'] == 0) {
118  $ThisFileInfo['error'][] = 'No Local File Header entries found';
119  return false;
120  }
121 
122  $ThisFileInfo['zip']['entries_count'] = 0;
123  while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($fd)) {
124  $ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry;
125  $ThisFileInfo['zip']['entries_count']++;
126  $ThisFileInfo['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
127  $ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
128  }
129  if ($ThisFileInfo['zip']['entries_count'] == 0) {
130  $ThisFileInfo['error'][] = 'No Central Directory entries found (truncated file?)';
131  return false;
132  }
133 
134  if ($EOCD = $this->ZIPparseEndOfCentralDirectory($fd)) {
135  $ThisFileInfo['zip']['end_central_directory'] = $EOCD;
136  } else {
137  $ThisFileInfo['error'][] = 'No End Of Central Directory entry found (truncated file?)';
138  return false;
139  }
140 
141  if (!empty($ThisFileInfo['zip']['end_central_directory']['comment'])) {
142  $ThisFileInfo['zip']['comments']['comment'][] = $ThisFileInfo['zip']['end_central_directory']['comment'];
143  }
144 
145  return true;
146  }
getid3_zip\ZIPparseEndOfCentralDirectory
ZIPparseEndOfCentralDirectory()
Definition: module.archive.zip.php:354
getid3_zip\ZIPparseLocalFileHeader
ZIPparseLocalFileHeader()
Definition: module.archive.zip.php:202
getid3_zip\ZIPparseCentralDirectory
ZIPparseCentralDirectory()
Definition: module.archive.zip.php:298
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◆ getZIPHeaderFilepointerTopDown() [2/2]

getid3_zip::getZIPHeaderFilepointerTopDown ( )

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

References $info, ZIPparseCentralDirectory(), ZIPparseEndOfCentralDirectory(), and ZIPparseLocalFileHeader().

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  $info['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  $info['error'][] = 'No Central Directory entries found (truncated file?)';
161  return false;
162  }
163 
164  if ($EOCD = $this->ZIPparseEndOfCentralDirectory()) {
165  $info['zip']['end_central_directory'] = $EOCD;
166  } else {
167  $info['error'][] = 'No End Of Central Directory entry found (truncated file?)';
168  return false;
169  }
170 
171  if (!empty($info['zip']['end_central_directory']['comment'])) {
172  $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment'];
173  }
174 
175  return true;
176  }
getid3_zip\ZIPparseEndOfCentralDirectory
ZIPparseEndOfCentralDirectory()
Definition: module.archive.zip.php:354
$info
$info
Definition: example_052.php:80
getid3_zip\ZIPparseLocalFileHeader
ZIPparseLocalFileHeader()
Definition: module.archive.zip.php:202
getid3_zip\ZIPparseCentralDirectory
ZIPparseCentralDirectory()
Definition: module.archive.zip.php:298
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◆ ZIPcompressionMethodLookup() [1/2]

getid3_zip::ZIPcompressionMethodLookup (   $index)

Definition at line 368 of file module.archive.zip.php.

Referenced by ZIPparseCentralDirectory(), and ZIPparseLocalFileHeader().

368  {
369  static $ZIPcompressionMethodLookup = array(
370  0 => 'store',
371  1 => 'shrink',
372  2 => 'reduce-1',
373  3 => 'reduce-2',
374  4 => 'reduce-3',
375  5 => 'reduce-4',
376  6 => 'implode',
377  7 => 'tokenize',
378  8 => 'deflate',
379  9 => 'deflate64',
380  10 => 'PKWARE Date Compression Library Imploding'
381  );
382 
383  return (isset($ZIPcompressionMethodLookup[$index]) ? $ZIPcompressionMethodLookup[$index] : '[unknown]');
384  }
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◆ ZIPcompressionMethodLookup() [2/2]

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  }

◆ ZIPparseCentralDirectory() [1/2]

getid3_zip::ZIPparseCentralDirectory ( &  $fd)

Definition at line 227 of file module.archive.zip.php.

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

227  {
228  $CentralDirectory['offset'] = ftell($fd);
229 
230  $ZIPcentralDirectory = fread($fd, 46);
231 
232  $CentralDirectory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4));
233  if ($CentralDirectory['raw']['signature'] != 0x02014B50) {
234  // invalid Central Directory Signature
235  fseek($fd, $CentralDirectory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
236  return false;
237  }
238  $CentralDirectory['raw']['create_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 4, 2));
239  $CentralDirectory['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 6, 2));
240  $CentralDirectory['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 8, 2));
241  $CentralDirectory['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2));
242  $CentralDirectory['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2));
243  $CentralDirectory['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2));
244  $CentralDirectory['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4));
245  $CentralDirectory['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4));
246  $CentralDirectory['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4));
247  $CentralDirectory['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2));
248  $CentralDirectory['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2));
249  $CentralDirectory['raw']['file_comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2));
250  $CentralDirectory['raw']['disk_number_start'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2));
251  $CentralDirectory['raw']['internal_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2));
252  $CentralDirectory['raw']['external_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4));
253  $CentralDirectory['raw']['local_header_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4));
254 
255  $CentralDirectory['entry_offset'] = $CentralDirectory['raw']['local_header_offset'];
256  $CentralDirectory['create_version'] = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10);
257  $CentralDirectory['extract_version'] = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10);
258  $CentralDirectory['host_os'] = $this->ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8);
259  $CentralDirectory['compression_method'] = $this->ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']);
260  $CentralDirectory['compressed_size'] = $CentralDirectory['raw']['compressed_size'];
261  $CentralDirectory['uncompressed_size'] = $CentralDirectory['raw']['uncompressed_size'];
262  $CentralDirectory['flags'] = $this->ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']);
263  $CentralDirectory['last_modified_timestamp'] = $this->DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']);
264 
265  $FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'] + $CentralDirectory['raw']['file_comment_length'];
266  if ($FilenameExtrafieldCommentLength > 0) {
267  $FilenameExtrafieldComment = fread($fd, $FilenameExtrafieldCommentLength);
268 
269  if ($CentralDirectory['raw']['filename_length'] > 0) {
270  $CentralDirectory['filename'] = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']);
271  }
272  if ($CentralDirectory['raw']['extra_field_length'] > 0) {
273  $CentralDirectory['raw']['extra_field_data'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']);
274  }
275  if ($CentralDirectory['raw']['file_comment_length'] > 0) {
276  $CentralDirectory['file_comment'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']);
277  }
278  }
279 
280  return $CentralDirectory;
281  }
getid3_zip\ZIPparseGeneralPurposeFlags
ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod)
Definition: module.archive.zip.php:310
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_zip\ZIPversionOSLookup
ZIPversionOSLookup($index)
Definition: module.archive.zip.php:343
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_handler\ftell
ftell()
Definition: getid3.php:1678
getid3_zip\ZIPcompressionMethodLookup
ZIPcompressionMethodLookup($index)
Definition: module.archive.zip.php:368
getid3_zip\DOStime2UNIXtime
DOStime2UNIXtime($DOSdate, $DOStime)
Definition: module.archive.zip.php:386
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◆ ZIPparseCentralDirectory() [2/2]

getid3_zip::ZIPparseCentralDirectory ( )

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

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

Referenced by Analyze(), getid3_zip(), and getZIPHeaderFilepointerTopDown().

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 $CentralDirectory;
352  }
getid3_zip\ZIPparseGeneralPurposeFlags
ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod)
Definition: module.archive.zip.php:310
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_zip\ZIPversionOSLookup
ZIPversionOSLookup($index)
Definition: module.archive.zip.php:343
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_handler\ftell
ftell()
Definition: getid3.php:1678
getid3_zip\ZIPcompressionMethodLookup
ZIPcompressionMethodLookup($index)
Definition: module.archive.zip.php:368
getid3_zip\DOStime2UNIXtime
DOStime2UNIXtime($DOSdate, $DOStime)
Definition: module.archive.zip.php:386
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◆ ZIPparseEndOfCentralDirectory() [1/2]

getid3_zip::ZIPparseEndOfCentralDirectory ( &  $fd)

Definition at line 283 of file module.archive.zip.php.

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

283  {
284  $EndOfCentralDirectory['offset'] = ftell($fd);
285 
286  $ZIPendOfCentralDirectory = fread($fd, 22);
287 
288  $EndOfCentralDirectory['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4));
289  if ($EndOfCentralDirectory['signature'] != 0x06054B50) {
290  // invalid End Of Central Directory Signature
291  fseek($fd, $EndOfCentralDirectory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
292  return false;
293  }
294  $EndOfCentralDirectory['disk_number_current'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 4, 2));
295  $EndOfCentralDirectory['disk_number_start_directory'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 6, 2));
296  $EndOfCentralDirectory['directory_entries_this_disk'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 8, 2));
297  $EndOfCentralDirectory['directory_entries_total'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 10, 2));
298  $EndOfCentralDirectory['directory_size'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 12, 4));
299  $EndOfCentralDirectory['directory_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 16, 4));
300  $EndOfCentralDirectory['comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 20, 2));
301 
302  if ($EndOfCentralDirectory['comment_length'] > 0) {
303  $EndOfCentralDirectory['comment'] = fread($fd, $EndOfCentralDirectory['comment_length']);
304  }
305 
306  return $EndOfCentralDirectory;
307  }
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_handler\ftell
ftell()
Definition: getid3.php:1678
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◆ ZIPparseEndOfCentralDirectory() [2/2]

getid3_zip::ZIPparseEndOfCentralDirectory ( )

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

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

Referenced by Analyze(), getid3_zip(), and getZIPHeaderFilepointerTopDown().

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 $EndOfCentralDirectory;
378  }
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_handler\ftell
ftell()
Definition: getid3.php:1678
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◆ ZIPparseGeneralPurposeFlags() [1/2]

getid3_zip::ZIPparseGeneralPurposeFlags (   $flagbytes,
  $compressionmethod 
)

Definition at line 310 of file module.archive.zip.php.

Referenced by ZIPparseCentralDirectory(), and ZIPparseLocalFileHeader().

310  {
311  $ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001);
312 
313  switch ($compressionmethod) {
314  case 6:
315  $ParsedFlags['dictionary_size'] = (($flagbytes & 0x0002) ? 8192 : 4096);
316  $ParsedFlags['shannon_fano_trees'] = (($flagbytes & 0x0004) ? 3 : 2);
317  break;
318 
319  case 8:
320  case 9:
321  switch (($flagbytes & 0x0006) >> 1) {
322  case 0:
323  $ParsedFlags['compression_speed'] = 'normal';
324  break;
325  case 1:
326  $ParsedFlags['compression_speed'] = 'maximum';
327  break;
328  case 2:
329  $ParsedFlags['compression_speed'] = 'fast';
330  break;
331  case 3:
332  $ParsedFlags['compression_speed'] = 'superfast';
333  break;
334  }
335  break;
336  }
337  $ParsedFlags['data_descriptor_used'] = (bool) ($flagbytes & 0x0008);
338 
339  return $ParsedFlags;
340  }
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◆ ZIPparseGeneralPurposeFlags() [2/2]

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  }

◆ ZIPparseLocalFileHeader() [1/2]

getid3_zip::ZIPparseLocalFileHeader ( &  $fd)

Definition at line 170 of file module.archive.zip.php.

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

170  {
171  $LocalFileHeader['offset'] = ftell($fd);
172 
173  $ZIPlocalFileHeader = fread($fd, 30);
174 
175  $LocalFileHeader['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4));
176  if ($LocalFileHeader['raw']['signature'] != 0x04034B50) {
177  // invalid Local File Header Signature
178  fseek($fd, $LocalFileHeader['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
179  return false;
180  }
181  $LocalFileHeader['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 4, 2));
182  $LocalFileHeader['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 6, 2));
183  $LocalFileHeader['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 8, 2));
184  $LocalFileHeader['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2));
185  $LocalFileHeader['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2));
186  $LocalFileHeader['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4));
187  $LocalFileHeader['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4));
188  $LocalFileHeader['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4));
189  $LocalFileHeader['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2));
190  $LocalFileHeader['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2));
191 
192  $LocalFileHeader['extract_version'] = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10);
193  $LocalFileHeader['host_os'] = $this->ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8);
194  $LocalFileHeader['compression_method'] = $this->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']);
195  $LocalFileHeader['compressed_size'] = $LocalFileHeader['raw']['compressed_size'];
196  $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['raw']['uncompressed_size'];
197  $LocalFileHeader['flags'] = $this->ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']);
198  $LocalFileHeader['last_modified_timestamp'] = $this->DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']);
199 
200  $FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] + $LocalFileHeader['raw']['extra_field_length'];
201  if ($FilenameExtrafieldLength > 0) {
202  $ZIPlocalFileHeader .= fread($fd, $FilenameExtrafieldLength);
203 
204  if ($LocalFileHeader['raw']['filename_length'] > 0) {
205  $LocalFileHeader['filename'] = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']);
206  }
207  if ($LocalFileHeader['raw']['extra_field_length'] > 0) {
208  $LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 + $LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']);
209  }
210  }
211 
212  $LocalFileHeader['data_offset'] = ftell($fd);
213  //$LocalFileHeader['compressed_data'] = fread($fd, $LocalFileHeader['raw']['compressed_size']);
214  fseek($fd, $LocalFileHeader['raw']['compressed_size'], SEEK_CUR);
215 
216  if ($LocalFileHeader['flags']['data_descriptor_used']) {
217  $DataDescriptor = fread($fd, 12);
218  $LocalFileHeader['data_descriptor']['crc_32'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 0, 4));
219  $LocalFileHeader['data_descriptor']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 4, 4));
220  $LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 8, 4));
221  }
222 
223  return $LocalFileHeader;
224  }
getid3_zip\ZIPparseGeneralPurposeFlags
ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod)
Definition: module.archive.zip.php:310
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_zip\ZIPversionOSLookup
ZIPversionOSLookup($index)
Definition: module.archive.zip.php:343
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_handler\ftell
ftell()
Definition: getid3.php:1678
getid3_zip\ZIPcompressionMethodLookup
ZIPcompressionMethodLookup($index)
Definition: module.archive.zip.php:368
getid3_zip\DOStime2UNIXtime
DOStime2UNIXtime($DOSdate, $DOStime)
Definition: module.archive.zip.php:386
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◆ ZIPparseLocalFileHeader() [2/2]

getid3_zip::ZIPparseLocalFileHeader ( )

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

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

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

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  $this->getid3->info['warning'][] = 'conflicting compressed_size from data_descriptor ('.$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  $this->getid3->info['warning'][] = 'conflicting uncompressed_size from data_descriptor ('.$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 $LocalFileHeader;
295  }
getid3_zip\ZIPparseGeneralPurposeFlags
ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod)
Definition: module.archive.zip.php:310
getid3_lib\LittleEndian2Int
LittleEndian2Int($byteword, $signed=false)
Definition: getid3.lib.php:266
getid3_zip\ZIPversionOSLookup
ZIPversionOSLookup($index)
Definition: module.archive.zip.php:343
getid3_handler\fread
fread($bytes)
Definition: getid3.php:1685
getid3_handler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: getid3.php:1697
getid3_lib\PrintHexBytes
PrintHexBytes($string, $hex=true, $spaces=true, $htmlsafe=true)
Definition: getid3.lib.php:17
getid3_handler\ftell
ftell()
Definition: getid3.php:1678
getid3_zip\ZIPcompressionMethodLookup
ZIPcompressionMethodLookup($index)
Definition: module.archive.zip.php:368
getid3_zip\DOStime2UNIXtime
DOStime2UNIXtime($DOSdate, $DOStime)
Definition: module.archive.zip.php:386
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◆ ZIPversionOSLookup() [1/2]

getid3_zip::ZIPversionOSLookup (   $index)

Definition at line 343 of file module.archive.zip.php.

Referenced by ZIPparseCentralDirectory(), and ZIPparseLocalFileHeader().

343  {
344  static $ZIPversionOSLookup = array(
345  0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)',
346  1 => 'Amiga',
347  2 => 'OpenVMS',
348  3 => 'Unix',
349  4 => 'VM/CMS',
350  5 => 'Atari ST',
351  6 => 'OS/2 H.P.F.S.',
352  7 => 'Macintosh',
353  8 => 'Z-System',
354  9 => 'CP/M',
355  10 => 'Windows NTFS',
356  11 => 'MVS',
357  12 => 'VSE',
358  13 => 'Acorn Risc',
359  14 => 'VFAT',
360  15 => 'Alternate MVS',
361  16 => 'BeOS',
362  17 => 'Tandem'
363  );
364 
365  return (isset($ZIPversionOSLookup[$index]) ? $ZIPversionOSLookup[$index] : '[unknown]');
366  }
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◆ ZIPversionOSLookup() [2/2]

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