419 lines
20 KiB
PHP
419 lines
20 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.archive.zip.php //
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// module for analyzing pkZip files //
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// dependencies: NONE //
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// ///
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/////////////////////////////////////////////////////////////////
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class getid3_zip
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{
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function getid3_zip(&$fd, &$ThisFileInfo) {
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$ThisFileInfo['fileformat'] = 'zip';
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$ThisFileInfo['zip']['encoding'] = 'ISO-8859-1';
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$ThisFileInfo['zip']['files'] = array();
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$ThisFileInfo['zip']['compressed_size'] = 0;
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$ThisFileInfo['zip']['uncompressed_size'] = 0;
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$ThisFileInfo['zip']['entries_count'] = 0;
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if (!getid3_lib::intValueSupported($ThisFileInfo['filesize'])) {
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$ThisFileInfo['error'][] = 'File is larger than '.round(PHP_INT_MAX / 1073741824).'GB, not supported by PHP';
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return false;
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} else {
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$EOCDsearchData = '';
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$EOCDsearchCounter = 0;
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while ($EOCDsearchCounter++ < 512) {
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fseek($fd, -128 * $EOCDsearchCounter, SEEK_END);
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$EOCDsearchData = fread($fd, 128).$EOCDsearchData;
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if (strstr($EOCDsearchData, 'PK'."\x05\x06")) {
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$EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06");
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fseek($fd, (-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END);
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$ThisFileInfo['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory($fd);
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fseek($fd, $ThisFileInfo['zip']['end_central_directory']['directory_offset'], SEEK_SET);
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$ThisFileInfo['zip']['entries_count'] = 0;
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while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($fd)) {
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$ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry;
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$ThisFileInfo['zip']['entries_count']++;
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$ThisFileInfo['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
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$ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
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if ($centraldirectoryentry['uncompressed_size'] > 0) {
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$ThisFileInfo['zip']['files'] = getid3_lib::array_merge_clobber($ThisFileInfo['zip']['files'], getid3_lib::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size']));
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}
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}
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if ($ThisFileInfo['zip']['entries_count'] == 0) {
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$ThisFileInfo['error'][] = 'No Central Directory entries found (truncated file?)';
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return false;
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}
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if (!empty($ThisFileInfo['zip']['end_central_directory']['comment'])) {
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$ThisFileInfo['zip']['comments']['comment'][] = $ThisFileInfo['zip']['end_central_directory']['comment'];
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}
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if (isset($ThisFileInfo['zip']['central_directory'][0]['compression_method'])) {
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$ThisFileInfo['zip']['compression_method'] = $ThisFileInfo['zip']['central_directory'][0]['compression_method'];
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}
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if (isset($ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'])) {
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$ThisFileInfo['zip']['compression_speed'] = $ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'];
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}
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if (isset($ThisFileInfo['zip']['compression_method']) && ($ThisFileInfo['zip']['compression_method'] == 'store') && !isset($ThisFileInfo['zip']['compression_speed'])) {
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$ThisFileInfo['zip']['compression_speed'] = 'store';
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}
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return true;
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}
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}
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}
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if ($this->getZIPentriesFilepointer($fd, $ThisFileInfo)) {
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// central directory couldn't be found and/or parsed
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// scan through actual file data entries, recover as much as possible from probable trucated file
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if ($ThisFileInfo['zip']['compressed_size'] > ($ThisFileInfo['filesize'] - 46 - 22)) {
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$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)';
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}
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$ThisFileInfo['error'][] = 'Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete';
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foreach ($ThisFileInfo['zip']['entries'] as $key => $valuearray) {
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$ThisFileInfo['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size'];
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}
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return true;
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} else {
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unset($ThisFileInfo['zip']);
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$ThisFileInfo['fileformat'] = '';
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$ThisFileInfo['error'][] = 'Cannot find End Of Central Directory (truncated file?)';
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return false;
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}
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}
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function getZIPHeaderFilepointerTopDown(&$fd, &$ThisFileInfo) {
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$ThisFileInfo['fileformat'] = 'zip';
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$ThisFileInfo['zip']['compressed_size'] = 0;
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$ThisFileInfo['zip']['uncompressed_size'] = 0;
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$ThisFileInfo['zip']['entries_count'] = 0;
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rewind($fd);
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while ($fileentry = $this->ZIPparseLocalFileHeader($fd)) {
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$ThisFileInfo['zip']['entries'][] = $fileentry;
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$ThisFileInfo['zip']['entries_count']++;
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}
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if ($ThisFileInfo['zip']['entries_count'] == 0) {
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$ThisFileInfo['error'][] = 'No Local File Header entries found';
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return false;
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}
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$ThisFileInfo['zip']['entries_count'] = 0;
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while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($fd)) {
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$ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry;
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$ThisFileInfo['zip']['entries_count']++;
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$ThisFileInfo['zip']['compressed_size'] += $centraldirectoryentry['compressed_size'];
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$ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size'];
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}
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if ($ThisFileInfo['zip']['entries_count'] == 0) {
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$ThisFileInfo['error'][] = 'No Central Directory entries found (truncated file?)';
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return false;
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}
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if ($EOCD = $this->ZIPparseEndOfCentralDirectory($fd)) {
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$ThisFileInfo['zip']['end_central_directory'] = $EOCD;
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} else {
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$ThisFileInfo['error'][] = 'No End Of Central Directory entry found (truncated file?)';
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return false;
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}
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if (!empty($ThisFileInfo['zip']['end_central_directory']['comment'])) {
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$ThisFileInfo['zip']['comments']['comment'][] = $ThisFileInfo['zip']['end_central_directory']['comment'];
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}
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return true;
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}
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function getZIPentriesFilepointer(&$fd, &$ThisFileInfo) {
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$ThisFileInfo['zip']['compressed_size'] = 0;
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$ThisFileInfo['zip']['uncompressed_size'] = 0;
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$ThisFileInfo['zip']['entries_count'] = 0;
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rewind($fd);
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while ($fileentry = $this->ZIPparseLocalFileHeader($fd)) {
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$ThisFileInfo['zip']['entries'][] = $fileentry;
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$ThisFileInfo['zip']['entries_count']++;
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$ThisFileInfo['zip']['compressed_size'] += $fileentry['compressed_size'];
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$ThisFileInfo['zip']['uncompressed_size'] += $fileentry['uncompressed_size'];
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}
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if ($ThisFileInfo['zip']['entries_count'] == 0) {
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$ThisFileInfo['error'][] = 'No Local File Header entries found';
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return false;
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}
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return true;
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}
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function ZIPparseLocalFileHeader(&$fd) {
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$LocalFileHeader['offset'] = ftell($fd);
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$ZIPlocalFileHeader = fread($fd, 30);
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$LocalFileHeader['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4));
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if ($LocalFileHeader['raw']['signature'] != 0x04034B50) {
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// invalid Local File Header Signature
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fseek($fd, $LocalFileHeader['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$LocalFileHeader['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 4, 2));
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$LocalFileHeader['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 6, 2));
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$LocalFileHeader['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 8, 2));
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$LocalFileHeader['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2));
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$LocalFileHeader['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2));
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$LocalFileHeader['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4));
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$LocalFileHeader['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4));
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$LocalFileHeader['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4));
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$LocalFileHeader['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2));
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$LocalFileHeader['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2));
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$LocalFileHeader['extract_version'] = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10);
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$LocalFileHeader['host_os'] = $this->ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8);
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$LocalFileHeader['compression_method'] = $this->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']);
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$LocalFileHeader['compressed_size'] = $LocalFileHeader['raw']['compressed_size'];
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$LocalFileHeader['uncompressed_size'] = $LocalFileHeader['raw']['uncompressed_size'];
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$LocalFileHeader['flags'] = $this->ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']);
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$LocalFileHeader['last_modified_timestamp'] = $this->DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']);
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$FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] + $LocalFileHeader['raw']['extra_field_length'];
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if ($FilenameExtrafieldLength > 0) {
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$ZIPlocalFileHeader .= fread($fd, $FilenameExtrafieldLength);
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if ($LocalFileHeader['raw']['filename_length'] > 0) {
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$LocalFileHeader['filename'] = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']);
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}
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if ($LocalFileHeader['raw']['extra_field_length'] > 0) {
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$LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 + $LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']);
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}
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}
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$LocalFileHeader['data_offset'] = ftell($fd);
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//$LocalFileHeader['compressed_data'] = fread($fd, $LocalFileHeader['raw']['compressed_size']);
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fseek($fd, $LocalFileHeader['raw']['compressed_size'], SEEK_CUR);
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if ($LocalFileHeader['flags']['data_descriptor_used']) {
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$DataDescriptor = fread($fd, 12);
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$LocalFileHeader['data_descriptor']['crc_32'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 0, 4));
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$LocalFileHeader['data_descriptor']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 4, 4));
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$LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 8, 4));
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}
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return $LocalFileHeader;
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}
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function ZIPparseCentralDirectory(&$fd) {
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$CentralDirectory['offset'] = ftell($fd);
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$ZIPcentralDirectory = fread($fd, 46);
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$CentralDirectory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4));
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if ($CentralDirectory['raw']['signature'] != 0x02014B50) {
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// invalid Central Directory Signature
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fseek($fd, $CentralDirectory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$CentralDirectory['raw']['create_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 4, 2));
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$CentralDirectory['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 6, 2));
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$CentralDirectory['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 8, 2));
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$CentralDirectory['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2));
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$CentralDirectory['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2));
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$CentralDirectory['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2));
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$CentralDirectory['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4));
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$CentralDirectory['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4));
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$CentralDirectory['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4));
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$CentralDirectory['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2));
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$CentralDirectory['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2));
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$CentralDirectory['raw']['file_comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2));
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$CentralDirectory['raw']['disk_number_start'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2));
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$CentralDirectory['raw']['internal_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2));
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$CentralDirectory['raw']['external_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4));
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$CentralDirectory['raw']['local_header_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4));
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$CentralDirectory['entry_offset'] = $CentralDirectory['raw']['local_header_offset'];
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$CentralDirectory['create_version'] = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10);
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$CentralDirectory['extract_version'] = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10);
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$CentralDirectory['host_os'] = $this->ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8);
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$CentralDirectory['compression_method'] = $this->ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']);
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$CentralDirectory['compressed_size'] = $CentralDirectory['raw']['compressed_size'];
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$CentralDirectory['uncompressed_size'] = $CentralDirectory['raw']['uncompressed_size'];
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$CentralDirectory['flags'] = $this->ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']);
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$CentralDirectory['last_modified_timestamp'] = $this->DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']);
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$FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'] + $CentralDirectory['raw']['file_comment_length'];
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if ($FilenameExtrafieldCommentLength > 0) {
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$FilenameExtrafieldComment = fread($fd, $FilenameExtrafieldCommentLength);
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if ($CentralDirectory['raw']['filename_length'] > 0) {
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$CentralDirectory['filename'] = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']);
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}
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if ($CentralDirectory['raw']['extra_field_length'] > 0) {
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$CentralDirectory['raw']['extra_field_data'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']);
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}
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if ($CentralDirectory['raw']['file_comment_length'] > 0) {
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$CentralDirectory['file_comment'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']);
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}
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}
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return $CentralDirectory;
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}
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function ZIPparseEndOfCentralDirectory(&$fd) {
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$EndOfCentralDirectory['offset'] = ftell($fd);
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$ZIPendOfCentralDirectory = fread($fd, 22);
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$EndOfCentralDirectory['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4));
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if ($EndOfCentralDirectory['signature'] != 0x06054B50) {
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// invalid End Of Central Directory Signature
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fseek($fd, $EndOfCentralDirectory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly
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return false;
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}
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$EndOfCentralDirectory['disk_number_current'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 4, 2));
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$EndOfCentralDirectory['disk_number_start_directory'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 6, 2));
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$EndOfCentralDirectory['directory_entries_this_disk'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 8, 2));
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$EndOfCentralDirectory['directory_entries_total'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 10, 2));
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$EndOfCentralDirectory['directory_size'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 12, 4));
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$EndOfCentralDirectory['directory_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 16, 4));
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$EndOfCentralDirectory['comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 20, 2));
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if ($EndOfCentralDirectory['comment_length'] > 0) {
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$EndOfCentralDirectory['comment'] = fread($fd, $EndOfCentralDirectory['comment_length']);
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}
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return $EndOfCentralDirectory;
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}
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function ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod) {
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$ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001);
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switch ($compressionmethod) {
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case 6:
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$ParsedFlags['dictionary_size'] = (($flagbytes & 0x0002) ? 8192 : 4096);
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$ParsedFlags['shannon_fano_trees'] = (($flagbytes & 0x0004) ? 3 : 2);
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break;
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case 8:
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case 9:
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switch (($flagbytes & 0x0006) >> 1) {
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case 0:
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$ParsedFlags['compression_speed'] = 'normal';
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break;
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case 1:
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$ParsedFlags['compression_speed'] = 'maximum';
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break;
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case 2:
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$ParsedFlags['compression_speed'] = 'fast';
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break;
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case 3:
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$ParsedFlags['compression_speed'] = 'superfast';
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break;
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}
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break;
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}
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$ParsedFlags['data_descriptor_used'] = (bool) ($flagbytes & 0x0008);
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return $ParsedFlags;
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}
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function ZIPversionOSLookup($index) {
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static $ZIPversionOSLookup = array(
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0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)',
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1 => 'Amiga',
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2 => 'OpenVMS',
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3 => 'Unix',
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4 => 'VM/CMS',
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5 => 'Atari ST',
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6 => 'OS/2 H.P.F.S.',
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7 => 'Macintosh',
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8 => 'Z-System',
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9 => 'CP/M',
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10 => 'Windows NTFS',
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11 => 'MVS',
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12 => 'VSE',
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13 => 'Acorn Risc',
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14 => 'VFAT',
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15 => 'Alternate MVS',
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16 => 'BeOS',
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17 => 'Tandem'
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);
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return (isset($ZIPversionOSLookup[$index]) ? $ZIPversionOSLookup[$index] : '[unknown]');
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}
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function ZIPcompressionMethodLookup($index) {
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static $ZIPcompressionMethodLookup = array(
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0 => 'store',
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1 => 'shrink',
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2 => 'reduce-1',
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3 => 'reduce-2',
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4 => 'reduce-3',
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5 => 'reduce-4',
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6 => 'implode',
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7 => 'tokenize',
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8 => 'deflate',
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9 => 'deflate64',
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10 => 'PKWARE Date Compression Library Imploding'
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);
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return (isset($ZIPcompressionMethodLookup[$index]) ? $ZIPcompressionMethodLookup[$index] : '[unknown]');
|
|
}
|
|
|
|
function DOStime2UNIXtime($DOSdate, $DOStime) {
|
|
// wFatDate
|
|
// Specifies the MS-DOS date. The date is a packed 16-bit value with the following format:
|
|
// Bits Contents
|
|
// 0-4 Day of the month (1-31)
|
|
// 5-8 Month (1 = January, 2 = February, and so on)
|
|
// 9-15 Year offset from 1980 (add 1980 to get actual year)
|
|
|
|
$UNIXday = ($DOSdate & 0x001F);
|
|
$UNIXmonth = (($DOSdate & 0x01E0) >> 5);
|
|
$UNIXyear = (($DOSdate & 0xFE00) >> 9) + 1980;
|
|
|
|
// wFatTime
|
|
// Specifies the MS-DOS time. The time is a packed 16-bit value with the following format:
|
|
// Bits Contents
|
|
// 0-4 Second divided by 2
|
|
// 5-10 Minute (0-59)
|
|
// 11-15 Hour (0-23 on a 24-hour clock)
|
|
|
|
$UNIXsecond = ($DOStime & 0x001F) * 2;
|
|
$UNIXminute = (($DOStime & 0x07E0) >> 5);
|
|
$UNIXhour = (($DOStime & 0xF800) >> 11);
|
|
|
|
return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
?>
|