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<?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at https://github.com/JamesHeinrich/getID3 // // or https://www.getid3.org // // or http://getid3.sourceforge.net // // see readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.archive.zip.php // // module for analyzing pkZip files // // dependencies: NONE // // /// ///////////////////////////////////////////////////////////////// if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers exit; } class getid3_zip extends getid3_handler { /** * @return bool */ public function Analyze() { $info = &$this->getid3->info; $info['fileformat'] = 'zip'; $info['zip']['encoding'] = 'ISO-8859-1'; $info['zip']['files'] = array(); $info['zip']['compressed_size'] = 0; $info['zip']['uncompressed_size'] = 0; $info['zip']['entries_count'] = 0; if (!getid3_lib::intValueSupported($info['filesize'])) { $this->error('File is larger than '.round(PHP_INT_MAX / 1073741824).'GB, not supported by PHP'); return false; } else { $EOCDsearchData = ''; $EOCDsearchCounter = 0; while ($EOCDsearchCounter++ < 512) { $this->fseek(-128 * $EOCDsearchCounter, SEEK_END); $EOCDsearchData = $this->fread(128).$EOCDsearchData; if (strstr($EOCDsearchData, 'PK'."\x05\x06")) { $EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06"); $this->fseek((-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END); $info['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory(); $this->fseek($info['zip']['end_central_directory']['directory_offset']); $info['zip']['entries_count'] = 0; while ($centraldirectoryentry = $this->ZIPparseCentralDirectory()) { $info['zip']['central_directory'][] = $centraldirectoryentry; $info['zip']['entries_count']++; $info['zip']['compressed_size'] += $centraldirectoryentry['compressed_size']; $info['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size']; //if ($centraldirectoryentry['uncompressed_size'] > 0) { zero-byte files are valid if (!empty($centraldirectoryentry['filename'])) { $info['zip']['files'] = getid3_lib::array_merge_clobber($info['zip']['files'], getid3_lib::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size'])); } } if ($info['zip']['entries_count'] == 0) { $this->error('No Central Directory entries found (truncated file?)'); return false; } if (!empty($info['zip']['end_central_directory']['comment'])) { $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment']; } if (isset($info['zip']['central_directory'][0]['compression_method'])) { $info['zip']['compression_method'] = $info['zip']['central_directory'][0]['compression_method']; } if (isset($info['zip']['central_directory'][0]['flags']['compression_speed'])) { $info['zip']['compression_speed'] = $info['zip']['central_directory'][0]['flags']['compression_speed']; } if (isset($info['zip']['compression_method']) && ($info['zip']['compression_method'] == 'store') && !isset($info['zip']['compression_speed'])) { $info['zip']['compression_speed'] = 'store'; } // secondary check - we (should) already have all the info we NEED from the Central Directory above, but scanning each // Local File Header entry will foreach ($info['zip']['central_directory'] as $central_directory_entry) { $this->fseek($central_directory_entry['entry_offset']); if ($fileentry = $this->ZIPparseLocalFileHeader()) { $info['zip']['entries'][] = $fileentry; } else { $this->warning('Error parsing Local File Header at offset '.$central_directory_entry['entry_offset']); } } // check for EPUB files if (!empty($info['zip']['entries'][0]['filename']) && ($info['zip']['entries'][0]['filename'] == 'mimetype') && ($info['zip']['entries'][0]['compression_method'] == 'store') && ($info['zip']['entries'][0]['uncompressed_size'] == 20) && isset($info['zip']['entries'][0]['data_offset'])) { // http://idpf.org/epub/30/spec/epub30-ocf.html // "3.3 OCF ZIP Container Media Type Identification // OCF ZIP Containers must include a mimetype file as the first file in the Container, and the contents of this file must be the MIME type string application/epub+zip. // The contents of the mimetype file must not contain any leading padding or whitespace, must not begin with the Unicode signature (or Byte Order Mark), // and the case of the MIME type string must be exactly as presented above. The mimetype file additionally must be neither compressed nor encrypted, // and there must not be an extra field in its ZIP header." $this->fseek($info['zip']['entries'][0]['data_offset']); if ($this->fread(20) == 'application/epub+zip') { $info['fileformat'] = 'zip.epub'; $info['mime_type'] = 'application/epub+zip'; } } // check for Office Open XML files (e.g. .docx, .xlsx) if (!empty($info['zip']['files']['[Content_Types].xml']) && !empty($info['zip']['files']['_rels']['.rels']) && !empty($info['zip']['files']['docProps']['app.xml']) && !empty($info['zip']['files']['docProps']['core.xml'])) { // http://technet.microsoft.com/en-us/library/cc179224.aspx $info['fileformat'] = 'zip.msoffice'; if (!empty($info['zip']['files']['ppt'])) { $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.presentationml.presentation'; } elseif (!empty($info['zip']['files']['xl'])) { $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'; } elseif (!empty($info['zip']['files']['word'])) { $info['mime_type'] = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'; } } return true; } } } if (!$this->getZIPentriesFilepointer()) { unset($info['zip']); $info['fileformat'] = ''; $this->error('Cannot find End Of Central Directory (truncated file?)'); return false; } // central directory couldn't be found and/or parsed // scan through actual file data entries, recover as much as possible from probable trucated file if ($info['zip']['compressed_size'] > ($info['filesize'] - 46 - 22)) { $this->error('Warning: Truncated file! - Total compressed file sizes ('.$info['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($info['filesize'] - 46 - 22).' bytes)'); } $this->error('Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete'); foreach ($info['zip']['entries'] as $key => $valuearray) { $info['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size']; } return true; } /** * @return bool */ public function getZIPHeaderFilepointerTopDown() { $info = &$this->getid3->info; $info['fileformat'] = 'zip'; $info['zip']['compressed_size'] = 0; $info['zip']['uncompressed_size'] = 0; $info['zip']['entries_count'] = 0; rewind($this->getid3->fp); while ($fileentry = $this->ZIPparseLocalFileHeader()) { $info['zip']['entries'][] = $fileentry; $info['zip']['entries_count']++; } if ($info['zip']['entries_count'] == 0) { $this->error('No Local File Header entries found'); return false; } $info['zip']['entries_count'] = 0; while ($centraldirectoryentry = $this->ZIPparseCentralDirectory()) { $info['zip']['central_directory'][] = $centraldirectoryentry; $info['zip']['entries_count']++; $info['zip']['compressed_size'] += $centraldirectoryentry['compressed_size']; $info['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size']; } if ($info['zip']['entries_count'] == 0) { $this->error('No Central Directory entries found (truncated file?)'); return false; } if ($EOCD = $this->ZIPparseEndOfCentralDirectory()) { $info['zip']['end_central_directory'] = $EOCD; } else { $this->error('No End Of Central Directory entry found (truncated file?)'); return false; } if (!empty($info['zip']['end_central_directory']['comment'])) { $info['zip']['comments']['comment'][] = $info['zip']['end_central_directory']['comment']; } return true; } /** * @return bool */ public function getZIPentriesFilepointer() { $info = &$this->getid3->info; $info['zip']['compressed_size'] = 0; $info['zip']['uncompressed_size'] = 0; $info['zip']['entries_count'] = 0; rewind($this->getid3->fp); while ($fileentry = $this->ZIPparseLocalFileHeader()) { $info['zip']['entries'][] = $fileentry; $info['zip']['entries_count']++; $info['zip']['compressed_size'] += $fileentry['compressed_size']; $info['zip']['uncompressed_size'] += $fileentry['uncompressed_size']; } if ($info['zip']['entries_count'] == 0) { $this->error('No Local File Header entries found'); return false; } return true; } /** * @return array|false */ public function ZIPparseLocalFileHeader() { $LocalFileHeader = array(); $LocalFileHeader['offset'] = $this->ftell(); $ZIPlocalFileHeader = $this->fread(30); $LocalFileHeader['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4)); if ($LocalFileHeader['raw']['signature'] != 0x04034B50) { // "PK\x03\x04" // invalid Local File Header Signature $this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly return false; } $LocalFileHeader['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 4, 2)); $LocalFileHeader['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 6, 2)); $LocalFileHeader['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 8, 2)); $LocalFileHeader['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 10, 2)); $LocalFileHeader['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 12, 2)); $LocalFileHeader['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 14, 4)); $LocalFileHeader['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 18, 4)); $LocalFileHeader['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 22, 4)); $LocalFileHeader['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 26, 2)); $LocalFileHeader['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 28, 2)); $LocalFileHeader['extract_version'] = sprintf('%1.1f', $LocalFileHeader['raw']['extract_version'] / 10); $LocalFileHeader['host_os'] = $this->ZIPversionOSLookup(($LocalFileHeader['raw']['extract_version'] & 0xFF00) >> 8); $LocalFileHeader['compression_method'] = $this->ZIPcompressionMethodLookup($LocalFileHeader['raw']['compression_method']); $LocalFileHeader['compressed_size'] = $LocalFileHeader['raw']['compressed_size']; $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['raw']['uncompressed_size']; $LocalFileHeader['flags'] = $this->ZIPparseGeneralPurposeFlags($LocalFileHeader['raw']['general_flags'], $LocalFileHeader['raw']['compression_method']); $LocalFileHeader['last_modified_timestamp'] = $this->DOStime2UNIXtime($LocalFileHeader['raw']['last_mod_file_date'], $LocalFileHeader['raw']['last_mod_file_time']); $FilenameExtrafieldLength = $LocalFileHeader['raw']['filename_length'] + $LocalFileHeader['raw']['extra_field_length']; if ($FilenameExtrafieldLength > 0) { $ZIPlocalFileHeader .= $this->fread($FilenameExtrafieldLength); if ($LocalFileHeader['raw']['filename_length'] > 0) { $LocalFileHeader['filename'] = substr($ZIPlocalFileHeader, 30, $LocalFileHeader['raw']['filename_length']); } if ($LocalFileHeader['raw']['extra_field_length'] > 0) { $LocalFileHeader['raw']['extra_field_data'] = substr($ZIPlocalFileHeader, 30 + $LocalFileHeader['raw']['filename_length'], $LocalFileHeader['raw']['extra_field_length']); } } if ($LocalFileHeader['compressed_size'] == 0) { // *Could* be a zero-byte file // But could also be a file written on the fly that didn't know compressed filesize beforehand. // Correct compressed filesize should be in the data_descriptor located after this file data, and also in Central Directory (at end of zip file) if (!empty($this->getid3->info['zip']['central_directory'])) { foreach ($this->getid3->info['zip']['central_directory'] as $central_directory_entry) { if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) { if ($central_directory_entry['compressed_size'] > 0) { // overwrite local zero value (but not ['raw']'compressed_size']) so that seeking for data_descriptor (and next file entry) works correctly $LocalFileHeader['compressed_size'] = $central_directory_entry['compressed_size']; } break; } } } } $LocalFileHeader['data_offset'] = $this->ftell(); $this->fseek($LocalFileHeader['compressed_size'], SEEK_CUR); // this should (but may not) match value in $LocalFileHeader['raw']['compressed_size'] -- $LocalFileHeader['compressed_size'] could have been overwritten above with value from Central Directory if ($LocalFileHeader['flags']['data_descriptor_used']) { $DataDescriptor = $this->fread(16); $LocalFileHeader['data_descriptor']['signature'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 0, 4)); if ($LocalFileHeader['data_descriptor']['signature'] != 0x08074B50) { // "PK\x07\x08" $this->getid3->warning('invalid Local File Header Data Descriptor Signature at offset '.($this->ftell() - 16).' - expecting 08 07 4B 50, found '.getid3_lib::PrintHexBytes($LocalFileHeader['data_descriptor']['signature'])); $this->fseek($LocalFileHeader['offset']); // seek back to where filepointer originally was so it can be handled properly return false; } $LocalFileHeader['data_descriptor']['crc_32'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 4, 4)); $LocalFileHeader['data_descriptor']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 8, 4)); $LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 12, 4)); if (!$LocalFileHeader['raw']['compressed_size'] && $LocalFileHeader['data_descriptor']['compressed_size']) { foreach ($this->getid3->info['zip']['central_directory'] as $central_directory_entry) { if ($central_directory_entry['entry_offset'] == $LocalFileHeader['offset']) { if ($LocalFileHeader['data_descriptor']['compressed_size'] == $central_directory_entry['compressed_size']) { // $LocalFileHeader['compressed_size'] already set from Central Directory } else { $this->warning('conflicting compressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['compressed_size'].') vs Central Directory ('.$central_directory_entry['compressed_size'].') for file at offset '.$LocalFileHeader['offset']); } if ($LocalFileHeader['data_descriptor']['uncompressed_size'] == $central_directory_entry['uncompressed_size']) { $LocalFileHeader['uncompressed_size'] = $LocalFileHeader['data_descriptor']['uncompressed_size']; } else { $this->warning('conflicting uncompressed_size from data_descriptor ('.$LocalFileHeader['data_descriptor']['uncompressed_size'].') vs Central Directory ('.$central_directory_entry['uncompressed_size'].') for file at offset '.$LocalFileHeader['offset']); } break; } } } } return $LocalFileHeader; } /** * @return array|false */ public function ZIPparseCentralDirectory() { $CentralDirectory = array(); $CentralDirectory['offset'] = $this->ftell(); $ZIPcentralDirectory = $this->fread(46); $CentralDirectory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4)); if ($CentralDirectory['raw']['signature'] != 0x02014B50) { // invalid Central Directory Signature $this->fseek($CentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly return false; } $CentralDirectory['raw']['create_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 4, 2)); $CentralDirectory['raw']['extract_version'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 6, 2)); $CentralDirectory['raw']['general_flags'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 8, 2)); $CentralDirectory['raw']['compression_method'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 10, 2)); $CentralDirectory['raw']['last_mod_file_time'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 12, 2)); $CentralDirectory['raw']['last_mod_file_date'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 14, 2)); $CentralDirectory['raw']['crc_32'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 16, 4)); $CentralDirectory['raw']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 20, 4)); $CentralDirectory['raw']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 24, 4)); $CentralDirectory['raw']['filename_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 28, 2)); $CentralDirectory['raw']['extra_field_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 30, 2)); $CentralDirectory['raw']['file_comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 32, 2)); $CentralDirectory['raw']['disk_number_start'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 34, 2)); $CentralDirectory['raw']['internal_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 36, 2)); $CentralDirectory['raw']['external_file_attrib'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 38, 4)); $CentralDirectory['raw']['local_header_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 42, 4)); $CentralDirectory['entry_offset'] = $CentralDirectory['raw']['local_header_offset']; $CentralDirectory['create_version'] = sprintf('%1.1f', $CentralDirectory['raw']['create_version'] / 10); $CentralDirectory['extract_version'] = sprintf('%1.1f', $CentralDirectory['raw']['extract_version'] / 10); $CentralDirectory['host_os'] = $this->ZIPversionOSLookup(($CentralDirectory['raw']['extract_version'] & 0xFF00) >> 8); $CentralDirectory['compression_method'] = $this->ZIPcompressionMethodLookup($CentralDirectory['raw']['compression_method']); $CentralDirectory['compressed_size'] = $CentralDirectory['raw']['compressed_size']; $CentralDirectory['uncompressed_size'] = $CentralDirectory['raw']['uncompressed_size']; $CentralDirectory['flags'] = $this->ZIPparseGeneralPurposeFlags($CentralDirectory['raw']['general_flags'], $CentralDirectory['raw']['compression_method']); $CentralDirectory['last_modified_timestamp'] = $this->DOStime2UNIXtime($CentralDirectory['raw']['last_mod_file_date'], $CentralDirectory['raw']['last_mod_file_time']); $FilenameExtrafieldCommentLength = $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'] + $CentralDirectory['raw']['file_comment_length']; if ($FilenameExtrafieldCommentLength > 0) { $FilenameExtrafieldComment = $this->fread($FilenameExtrafieldCommentLength); if ($CentralDirectory['raw']['filename_length'] > 0) { $CentralDirectory['filename'] = substr($FilenameExtrafieldComment, 0, $CentralDirectory['raw']['filename_length']); } if ($CentralDirectory['raw']['extra_field_length'] > 0) { $CentralDirectory['raw']['extra_field_data'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'], $CentralDirectory['raw']['extra_field_length']); } if ($CentralDirectory['raw']['file_comment_length'] > 0) { $CentralDirectory['file_comment'] = substr($FilenameExtrafieldComment, $CentralDirectory['raw']['filename_length'] + $CentralDirectory['raw']['extra_field_length'], $CentralDirectory['raw']['file_comment_length']); } } return $CentralDirectory; } /** * @return array|false */ public function ZIPparseEndOfCentralDirectory() { $EndOfCentralDirectory = array(); $EndOfCentralDirectory['offset'] = $this->ftell(); $ZIPendOfCentralDirectory = $this->fread(22); $EndOfCentralDirectory['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4)); if ($EndOfCentralDirectory['signature'] != 0x06054B50) { // invalid End Of Central Directory Signature $this->fseek($EndOfCentralDirectory['offset']); // seek back to where filepointer originally was so it can be handled properly return false; } $EndOfCentralDirectory['disk_number_current'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 4, 2)); $EndOfCentralDirectory['disk_number_start_directory'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 6, 2)); $EndOfCentralDirectory['directory_entries_this_disk'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 8, 2)); $EndOfCentralDirectory['directory_entries_total'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 10, 2)); $EndOfCentralDirectory['directory_size'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 12, 4)); $EndOfCentralDirectory['directory_offset'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 16, 4)); $EndOfCentralDirectory['comment_length'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 20, 2)); if ($EndOfCentralDirectory['comment_length'] > 0) { $EndOfCentralDirectory['comment'] = $this->fread($EndOfCentralDirectory['comment_length']); } return $EndOfCentralDirectory; } /** * @param int $flagbytes * @param int $compressionmethod * * @return array */ public static function ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod) { // https://users.cs.jmu.edu/buchhofp/forensics/formats/pkzip-printable.html $ParsedFlags = array(); $ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001); // 0x0002 -- see below // 0x0004 -- see below $ParsedFlags['data_descriptor_used'] = (bool) ($flagbytes & 0x0008); $ParsedFlags['enhanced_deflation'] = (bool) ($flagbytes & 0x0010); $ParsedFlags['compressed_patched_data'] = (bool) ($flagbytes & 0x0020); $ParsedFlags['strong_encryption'] = (bool) ($flagbytes & 0x0040); // 0x0080 - unused // 0x0100 - unused // 0x0200 - unused // 0x0400 - unused $ParsedFlags['language_encoding'] = (bool) ($flagbytes & 0x0800); // 0x1000 - reserved $ParsedFlags['mask_header_values'] = (bool) ($flagbytes & 0x2000); // 0x4000 - reserved // 0x8000 - reserved switch ($compressionmethod) { case 6: $ParsedFlags['dictionary_size'] = (($flagbytes & 0x0002) ? 8192 : 4096); $ParsedFlags['shannon_fano_trees'] = (($flagbytes & 0x0004) ? 3 : 2); break; case 8: case 9: switch (($flagbytes & 0x0006) >> 1) { case 0: $ParsedFlags['compression_speed'] = 'normal'; break; case 1: $ParsedFlags['compression_speed'] = 'maximum'; break; case 2: $ParsedFlags['compression_speed'] = 'fast'; break; case 3: $ParsedFlags['compression_speed'] = 'superfast'; break; } break; } return $ParsedFlags; } /** * @param int $index * * @return string */ public static function ZIPversionOSLookup($index) { static $ZIPversionOSLookup = array( 0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)', 1 => 'Amiga', 2 => 'OpenVMS', 3 => 'Unix', 4 => 'VM/CMS', 5 => 'Atari ST', 6 => 'OS/2 H.P.F.S.', 7 => 'Macintosh', 8 => 'Z-System', 9 => 'CP/M', 10 => 'Windows NTFS', 11 => 'MVS', 12 => 'VSE', 13 => 'Acorn Risc', 14 => 'VFAT', 15 => 'Alternate MVS', 16 => 'BeOS', 17 => 'Tandem', 18 => 'OS/400', 19 => 'OS/X (Darwin)', ); return (isset($ZIPversionOSLookup[$index]) ? $ZIPversionOSLookup[$index] : '[unknown]'); } /** * @param int $index * * @return string */ public static function ZIPcompressionMethodLookup($index) { // http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/ZIP.html static $ZIPcompressionMethodLookup = array( 0 => 'store', 1 => 'shrink', 2 => 'reduce-1', 3 => 'reduce-2', 4 => 'reduce-3', 5 => 'reduce-4', 6 => 'implode', 7 => 'tokenize', 8 => 'deflate', 9 => 'deflate64', 10 => 'Imploded (old IBM TERSE)', 11 => 'RESERVED[11]', 12 => 'BZIP2', 13 => 'RESERVED[13]', 14 => 'LZMA (EFS)', 15 => 'RESERVED[15]', 16 => 'RESERVED[16]', 17 => 'RESERVED[17]', 18 => 'IBM TERSE (new)', 19 => 'IBM LZ77 z Architecture (PFS)', 96 => 'JPEG recompressed', 97 => 'WavPack compressed', 98 => 'PPMd version I, Rev 1', ); return (isset($ZIPcompressionMethodLookup[$index]) ? $ZIPcompressionMethodLookup[$index] : '[unknown]'); } /** * @param int $DOSdate * @param int $DOStime * * @return int */ public static function DOStime2UNIXtime($DOSdate, $DOStime) { // wFatDate // Specifies the MS-DOS date. The date is a packed 16-bit value with the following format: // Bits Contents // 0-4 Day of the month (1-31) // 5-8 Month (1 = January, 2 = February, and so on) // 9-15 Year offset from 1980 (add 1980 to get actual year) $UNIXday = ($DOSdate & 0x001F); $UNIXmonth = (($DOSdate & 0x01E0) >> 5); $UNIXyear = (($DOSdate & 0xFE00) >> 9) + 1980; // wFatTime // Specifies the MS-DOS time. The time is a packed 16-bit value with the following format: // Bits Contents // 0-4 Second divided by 2 // 5-10 Minute (0-59) // 11-15 Hour (0-23 on a 24-hour clock) $UNIXsecond = ($DOStime & 0x001F) * 2; $UNIXminute = (($DOStime & 0x07E0) >> 5); $UNIXhour = (($DOStime & 0xF800) >> 11); return gmmktime($UNIXhour, $UNIXminute, $UNIXsecond, $UNIXmonth, $UNIXday, $UNIXyear); } }