diff options
Diffstat (limited to 'getid3/module.archive.zip.php')
| -rw-r--r-- | getid3/module.archive.zip.php | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/getid3/module.archive.zip.php b/getid3/module.archive.zip.php new file mode 100644 index 0000000..1d2be06 --- /dev/null +++ b/getid3/module.archive.zip.php @@ -0,0 +1,416 @@ +<?php +///////////////////////////////////////////////////////////////// +/// getID3() by James Heinrich <info@getid3.org> // +// available at http://getid3.sourceforge.net // +// or http://www.getid3.org // +///////////////////////////////////////////////////////////////// +// See readme.txt for more details // +///////////////////////////////////////////////////////////////// +// // +// module.archive.zip.php // +// module for analyzing pkZip files // +// dependencies: NONE // +// /// +///////////////////////////////////////////////////////////////// + + +class getid3_zip +{ + + function getid3_zip(&$fd, &$ThisFileInfo) { + + $ThisFileInfo['fileformat'] = 'zip'; + $ThisFileInfo['zip']['encoding'] = 'ISO-8859-1'; + $ThisFileInfo['zip']['files'] = array(); + + $ThisFileInfo['zip']['compressed_size'] = 0; + $ThisFileInfo['zip']['uncompressed_size'] = 0; + $ThisFileInfo['zip']['entries_count'] = 0; + + if ($ThisFileInfo['filesize'] < pow(2, 31)) { + $EOCDsearchData = ''; + $EOCDsearchCounter = 0; + while ($EOCDsearchCounter++ < 512) { + + fseek($fd, -128 * $EOCDsearchCounter, SEEK_END); + $EOCDsearchData = fread($fd, 128).$EOCDsearchData; + + if (strstr($EOCDsearchData, 'PK'."\x05\x06")) { + + $EOCDposition = strpos($EOCDsearchData, 'PK'."\x05\x06"); + fseek($fd, (-128 * $EOCDsearchCounter) + $EOCDposition, SEEK_END); + $ThisFileInfo['zip']['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory($fd); + + fseek($fd, $ThisFileInfo['zip']['end_central_directory']['directory_offset'], SEEK_SET); + $ThisFileInfo['zip']['entries_count'] = 0; + while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($fd)) { + $ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry; + $ThisFileInfo['zip']['entries_count']++; + $ThisFileInfo['zip']['compressed_size'] += $centraldirectoryentry['compressed_size']; + $ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size']; + + if ($centraldirectoryentry['uncompressed_size'] > 0) { + $ThisFileInfo['zip']['files'] = getid3_lib::array_merge_clobber($ThisFileInfo['zip']['files'], getid3_lib::CreateDeepArray($centraldirectoryentry['filename'], '/', $centraldirectoryentry['uncompressed_size'])); + } + } + + if ($ThisFileInfo['zip']['entries_count'] == 0) { + $ThisFileInfo['error'][] = 'No Central Directory entries found (truncated file?)'; + return false; + } + + if (!empty($ThisFileInfo['zip']['end_central_directory']['comment'])) { + $ThisFileInfo['zip']['comments']['comment'][] = $ThisFileInfo['zip']['end_central_directory']['comment']; + } + + if (isset($ThisFileInfo['zip']['central_directory'][0]['compression_method'])) { + $ThisFileInfo['zip']['compression_method'] = $ThisFileInfo['zip']['central_directory'][0]['compression_method']; + } + if (isset($ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed'])) { + $ThisFileInfo['zip']['compression_speed'] = $ThisFileInfo['zip']['central_directory'][0]['flags']['compression_speed']; + } + if (isset($ThisFileInfo['zip']['compression_method']) && ($ThisFileInfo['zip']['compression_method'] == 'store') && !isset($ThisFileInfo['zip']['compression_speed'])) { + $ThisFileInfo['zip']['compression_speed'] = 'store'; + } + + return true; + + } + } + } + + if ($this->getZIPentriesFilepointer($fd, $ThisFileInfo)) { + + // central directory couldn't be found and/or parsed + // scan through actual file data entries, recover as much as possible from probable trucated file + if ($ThisFileInfo['zip']['compressed_size'] > ($ThisFileInfo['filesize'] - 46 - 22)) { + $ThisFileInfo['error'][] = 'Warning: Truncated file! - Total compressed file sizes ('.$ThisFileInfo['zip']['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($ThisFileInfo['filesize'] - 46 - 22).' bytes)'; + } + $ThisFileInfo['error'][] = 'Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete'; + foreach ($ThisFileInfo['zip']['entries'] as $key => $valuearray) { + $ThisFileInfo['zip']['files'][$valuearray['filename']] = $valuearray['uncompressed_size']; + } + return true; + + } else { + + unset($ThisFileInfo['zip']); + $ThisFileInfo['fileformat'] = ''; + $ThisFileInfo['error'][] = 'Cannot find End Of Central Directory (truncated file?)'; + return false; + + } + } + + + function getZIPHeaderFilepointerTopDown(&$fd, &$ThisFileInfo) { + $ThisFileInfo['fileformat'] = 'zip'; + + $ThisFileInfo['zip']['compressed_size'] = 0; + $ThisFileInfo['zip']['uncompressed_size'] = 0; + $ThisFileInfo['zip']['entries_count'] = 0; + + rewind($fd); + while ($fileentry = $this->ZIPparseLocalFileHeader($fd)) { + $ThisFileInfo['zip']['entries'][] = $fileentry; + $ThisFileInfo['zip']['entries_count']++; + } + if ($ThisFileInfo['zip']['entries_count'] == 0) { + $ThisFileInfo['error'][] = 'No Local File Header entries found'; + return false; + } + + $ThisFileInfo['zip']['entries_count'] = 0; + while ($centraldirectoryentry = $this->ZIPparseCentralDirectory($fd)) { + $ThisFileInfo['zip']['central_directory'][] = $centraldirectoryentry; + $ThisFileInfo['zip']['entries_count']++; + $ThisFileInfo['zip']['compressed_size'] += $centraldirectoryentry['compressed_size']; + $ThisFileInfo['zip']['uncompressed_size'] += $centraldirectoryentry['uncompressed_size']; + } + if ($ThisFileInfo['zip']['entries_count'] == 0) { + $ThisFileInfo['error'][] = 'No Central Directory entries found (truncated file?)'; + return false; + } + + if ($EOCD = $this->ZIPparseEndOfCentralDirectory($fd)) { + $ThisFileInfo['zip']['end_central_directory'] = $EOCD; + } else { + $ThisFileInfo['error'][] = 'No End Of Central Directory entry found (truncated file?)'; + return false; + } + + if (!empty($ThisFileInfo['zip']['end_central_directory']['comment'])) { + $ThisFileInfo['zip']['comments']['comment'][] = $ThisFileInfo['zip']['end_central_directory']['comment']; + } + + return true; + } + + + function getZIPentriesFilepointer(&$fd, &$ThisFileInfo) { + $ThisFileInfo['zip']['compressed_size'] = 0; + $ThisFileInfo['zip']['uncompressed_size'] = 0; + $ThisFileInfo['zip']['entries_count'] = 0; + + rewind($fd); + while ($fileentry = $this->ZIPparseLocalFileHeader($fd)) { + $ThisFileInfo['zip']['entries'][] = $fileentry; + $ThisFileInfo['zip']['entries_count']++; + $ThisFileInfo['zip']['compressed_size'] += $fileentry['compressed_size']; + $ThisFileInfo['zip']['uncompressed_size'] += $fileentry['uncompressed_size']; + } + if ($ThisFileInfo['zip']['entries_count'] == 0) { + $ThisFileInfo['error'][] = 'No Local File Header entries found'; + return false; + } + + return true; + } + + + function ZIPparseLocalFileHeader(&$fd) { + $LocalFileHeader['offset'] = ftell($fd); + + $ZIPlocalFileHeader = fread($fd, 30); + + $LocalFileHeader['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPlocalFileHeader, 0, 4)); + if ($LocalFileHeader['raw']['signature'] != 0x04034B50) { + // invalid Local File Header Signature + fseek($fd, $LocalFileHeader['offset'], SEEK_SET); // 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) { + $ZIPlocalFileHeader .= fread($fd, $FilenameExtrafieldLength); + + if ($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']); + } + } + + $LocalFileHeader['data_offset'] = ftell($fd); + //$LocalFileHeader['compressed_data'] = fread($fd, $LocalFileHeader['raw']['compressed_size']); + fseek($fd, $LocalFileHeader['raw']['compressed_size'], SEEK_CUR); + + if ($LocalFileHeader['flags']['data_descriptor_used']) { + $DataDescriptor = fread($fd, 12); + $LocalFileHeader['data_descriptor']['crc_32'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 0, 4)); + $LocalFileHeader['data_descriptor']['compressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 4, 4)); + $LocalFileHeader['data_descriptor']['uncompressed_size'] = getid3_lib::LittleEndian2Int(substr($DataDescriptor, 8, 4)); + } + + return $LocalFileHeader; + } + + + function ZIPparseCentralDirectory(&$fd) { + $CentralDirectory['offset'] = ftell($fd); + + $ZIPcentralDirectory = fread($fd, 46); + + $CentralDirectory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPcentralDirectory, 0, 4)); + if ($CentralDirectory['raw']['signature'] != 0x02014B50) { + // invalid Central Directory Signature + fseek($fd, $CentralDirectory['offset'], SEEK_SET); // 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) { + $FilenameExtrafieldComment = fread($fd, $FilenameExtrafieldCommentLength); + + if ($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 $CentralDirectory; + } + + function ZIPparseEndOfCentralDirectory(&$fd) { + $EndOfCentralDirectory['offset'] = ftell($fd); + + $ZIPendOfCentralDirectory = fread($fd, 22); + + $EndOfCentralDirectory['signature'] = getid3_lib::LittleEndian2Int(substr($ZIPendOfCentralDirectory, 0, 4)); + if ($EndOfCentralDirectory['signature'] != 0x06054B50) { + // invalid End Of Central Directory Signature + fseek($fd, $EndOfCentralDirectory['offset'], SEEK_SET); // 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) { + $EndOfCentralDirectory['comment'] = fread($fd, $EndOfCentralDirectory['comment_length']); + } + + return $EndOfCentralDirectory; + } + + + function ZIPparseGeneralPurposeFlags($flagbytes, $compressionmethod) { + $ParsedFlags['encrypted'] = (bool) ($flagbytes & 0x0001); + + 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; + } + $ParsedFlags['data_descriptor_used'] = (bool) ($flagbytes & 0x0008); + + return $ParsedFlags; + } + + + function ZIPversionOSLookup($index) { + static $ZIPversionOSLookup = array( + 0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)', + 1 => 'Amiga', + 2 => 'OpenVMS', + 3 => 'Unix', + 4 => 'VM/CMS', + 5 => 'Atari ST', + 6 => 'OS/2 H.P.F.S.', + 7 => 'Macintosh', + 8 => 'Z-System', + 9 => 'CP/M', + 10 => 'Windows NTFS', + 11 => 'MVS', + 12 => 'VSE', + 13 => 'Acorn Risc', + 14 => 'VFAT', + 15 => 'Alternate MVS', + 16 => 'BeOS', + 17 => 'Tandem' + ); + + return (isset($ZIPversionOSLookup[$index]) ? $ZIPversionOSLookup[$index] : '[unknown]'); + } + + function ZIPcompressionMethodLookup($index) { + static $ZIPcompressionMethodLookup = array( + 0 => 'store', + 1 => 'shrink', + 2 => 'reduce-1', + 3 => 'reduce-2', + 4 => 'reduce-3', + 5 => 'reduce-4', + 6 => 'implode', + 7 => 'tokenize', + 8 => 'deflate', + 9 => 'deflate64', + 10 => 'PKWARE Date Compression Library Imploding' + ); + + return (isset($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); + } + +} + + +?>
\ No newline at end of file |