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Diffstat (limited to 'modules/getid3/module.archive.zip.php')
| -rw-r--r-- | modules/getid3/module.archive.zip.php | 510 |
1 files changed, 510 insertions, 0 deletions
diff --git a/modules/getid3/module.archive.zip.php b/modules/getid3/module.archive.zip.php new file mode 100644 index 00000000..bb84538b --- /dev/null +++ b/modules/getid3/module.archive.zip.php @@ -0,0 +1,510 @@ +<?php +// +----------------------------------------------------------------------+ +// | PHP version 5 | +// +----------------------------------------------------------------------+ +// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | +// +----------------------------------------------------------------------+ +// | This source file is subject to version 2 of the GPL license, | +// | that is bundled with this package in the file license.txt and is | +// | available through the world-wide-web at the following url: | +// | http://www.gnu.org/copyleft/gpl.html | +// +----------------------------------------------------------------------+ +// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | +// +----------------------------------------------------------------------+ +// | Authors: James Heinrich <infoØgetid3*org> | +// | Allan Hansen <ahØartemis*dk> | +// +----------------------------------------------------------------------+ +// | module.archive.zip.php | +// | Module for analyzing pkZip files | +// | dependencies: NONE | +// +----------------------------------------------------------------------+ +// +// $Id: module.archive.zip.php,v 1.4 2006/11/02 10:48:00 ah Exp $ + + + +class getid3_zip extends getid3_handler +{ + + public function Analyze() { + + $getid3 = $this->getid3; + + $getid3->info['zip'] = array (); + $info_zip = &$getid3->info['zip']; + + $getid3->info['fileformat'] = 'zip'; + + $info_zip['encoding'] = 'ISO-8859-1'; + $info_zip['files'] = array (); + $info_zip['compressed_size'] = $info_zip['uncompressed_size'] = $info_zip['entries_count'] = 0; + + $eocd_search_data = ''; + $eocd_search_counter = 0; + while ($eocd_search_counter++ < 512) { + + fseek($getid3->fp, -128 * $eocd_search_counter, SEEK_END); + $eocd_search_data = fread($getid3->fp, 128).$eocd_search_data; + + if (strstr($eocd_search_data, 'PK'."\x05\x06")) { + + $eocd_position = strpos($eocd_search_data, 'PK'."\x05\x06"); + fseek($getid3->fp, (-128 * $eocd_search_counter) + $eocd_position, SEEK_END); + $info_zip['end_central_directory'] = $this->ZIPparseEndOfCentralDirectory(); + + fseek($getid3->fp, $info_zip['end_central_directory']['directory_offset'], SEEK_SET); + $info_zip['entries_count'] = 0; + while ($central_directoryentry = $this->ZIPparseCentralDirectory($getid3->fp)) { + $info_zip['central_directory'][] = $central_directoryentry; + $info_zip['entries_count']++; + $info_zip['compressed_size'] += $central_directoryentry['compressed_size']; + $info_zip['uncompressed_size'] += $central_directoryentry['uncompressed_size']; + + if ($central_directoryentry['uncompressed_size'] > 0) { + $info_zip['files'] = getid3_zip::array_merge_clobber($info_zip['files'], getid3_zip::CreateDeepArray($central_directoryentry['filename'], '/', $central_directoryentry['uncompressed_size'])); + } + } + + if ($info_zip['entries_count'] == 0) { + throw new getid3_exception('No Central Directory entries found (truncated file?)'); + } + + 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'])) { + $info_zip['compression_speed'] = 'store'; + } + + return true; + } + } + + if ($this->getZIPentriesFilepointer()) { + + // 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 (@$info_zip['compressed_size'] > ($getid3->info['filesize'] - 46 - 22)) { + throw new getid3_exception('Warning: Truncated file! - Total compressed file sizes ('.$info_zip['compressed_size'].' bytes) is greater than filesize minus Central Directory and End Of Central Directory structures ('.($getid3->info['filesize'] - 46 - 22).' bytes)'); + } + throw new getid3_exception('Cannot find End Of Central Directory - returned list of files in [zip][entries] array may not be complete'); + } + + //throw new getid3_exception('Cannot find End Of Central Directory (truncated file?)'); + } + + + + private function getZIPHeaderFilepointerTopDown() { + + // shortcut + $getid3 = $this->getid3; + + $getid3->info['fileformat'] = 'zip'; + + $getid3->info['zip'] = array (); + $info_zip['compressed_size'] = $info_zip['uncompressed_size'] = $info_zip['entries_count'] = 0; + + rewind($getid3->fp); + while ($fileentry = $this->ZIPparseLocalFileHeader()) { + $info_zip['entries'][] = $fileentry; + $info_zip['entries_count']++; + } + if ($info_zip['entries_count'] == 0) { + throw new getid3_exception('No Local File Header entries found'); + } + + $info_zip['entries_count'] = 0; + while ($central_directoryentry = $this->ZIPparseCentralDirectory($getid3->fp)) { + $info_zip['central_directory'][] = $central_directoryentry; + $info_zip['entries_count']++; + $info_zip['compressed_size'] += $central_directoryentry['compressed_size']; + $info_zip['uncompressed_size'] += $central_directoryentry['uncompressed_size']; + } + if ($info_zip['entries_count'] == 0) { + throw new getid3_exception('No Central Directory entries found (truncated file?)'); + } + + if ($eocd = $this->ZIPparseEndOfCentralDirectory()) { + $info_zip['end_central_directory'] = $eocd; + } else { + throw new getid3_exception('No End Of Central Directory entry found (truncated file?)'); + } + + if (!@$info_zip['end_central_directory']['comment']) { + $info_zip['comments']['comment'][] = $info_zip['end_central_directory']['comment']; + } + + return true; + } + + + + private function getZIPentriesFilepointer() { + + // shortcut + $getid3 = $this->getid3; + + $getid3->info['zip'] = array (); + $info_zip['compressed_size'] = $info_zip['uncompressed_size'] = $info_zip['entries_count'] = 0; + + rewind($getid3->fp); + while ($fileentry = $this->ZIPparseLocalFileHeader($getid3->fp)) { + $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) { + throw new getid3_exception('No Local File Header entries found'); + } + + return true; + } + + + + private function ZIPparseLocalFileHeader() { + + // shortcut + $getid3 = $this->getid3; + + $local_file_header['offset'] = ftell($getid3->fp); + + $zip_local_file_header = fread($getid3->fp, 30); + + $local_file_header['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($zip_local_file_header, 0, 4)); + + // Invalid Local File Header Signature + if ($local_file_header['raw']['signature'] != 0x04034B50) { + fseek($getid3->fp, $local_file_header['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly + return false; + } + + getid3_lib::ReadSequence('LittleEndian2Int', $local_file_header['raw'], $zip_local_file_header, 4, + array ( + 'extract_version' => 2, + 'general_flags' => 2, + 'compression_method' => 2, + 'last_mod_file_time' => 2, + 'last_mod_file_date' => 2, + 'crc_32' => 2, + 'compressed_size' => 2, + 'uncompressed_size' => 2, + 'filename_length' => 2, + 'extra_field_length' => 2 + ) + ); + + $local_file_header['extract_version'] = sprintf('%1.1f', $local_file_header['raw']['extract_version'] / 10); + $local_file_header['host_os'] = $this->ZIPversionOSLookup(($local_file_header['raw']['extract_version'] & 0xFF00) >> 8); + $local_file_header['compression_method'] = $this->ZIPcompressionMethodLookup($local_file_header['raw']['compression_method']); + $local_file_header['compressed_size'] = $local_file_header['raw']['compressed_size']; + $local_file_header['uncompressed_size'] = $local_file_header['raw']['uncompressed_size']; + $local_file_header['flags'] = $this->ZIPparseGeneralPurposeFlags($local_file_header['raw']['general_flags'], $local_file_header['raw']['compression_method']); + $local_file_header['last_modified_timestamp'] = $this->DOStime2UNIXtime($local_file_header['raw']['last_mod_file_date'], $local_file_header['raw']['last_mod_file_time']); + + $filename_extra_field_length = $local_file_header['raw']['filename_length'] + $local_file_header['raw']['extra_field_length']; + if ($filename_extra_field_length > 0) { + $zip_local_file_header .= fread($getid3->fp, $filename_extra_field_length); + + if ($local_file_header['raw']['filename_length'] > 0) { + $local_file_header['filename'] = substr($zip_local_file_header, 30, $local_file_header['raw']['filename_length']); + } + if ($local_file_header['raw']['extra_field_length'] > 0) { + $local_file_header['raw']['extra_field_data'] = substr($zip_local_file_header, 30 + $local_file_header['raw']['filename_length'], $local_file_header['raw']['extra_field_length']); + } + } + + $local_file_header['data_offset'] = ftell($getid3->fp); + fseek($getid3->fp, $local_file_header['raw']['compressed_size'], SEEK_CUR); + + if ($local_file_header['flags']['data_descriptor_used']) { + $data_descriptor = fread($getid3->fp, 12); + + getid3_lib::ReadSequence('LittleEndian2Int', $local_file_header['data_descriptor'], $data_descriptor, 0, + array ( + 'crc_32' => 4, + 'compressed_size' => 4, + 'uncompressed_size' => 4 + ) + ); + } + + return $local_file_header; + } + + + + private function ZIPparseCentralDirectory() { + + // shortcut + $getid3 = $this->getid3; + + $central_directory['offset'] = ftell($getid3->fp); + + $zip_central_directory = fread($getid3->fp, 46); + + $central_directory['raw']['signature'] = getid3_lib::LittleEndian2Int(substr($zip_central_directory, 0, 4)); + + // invalid Central Directory Signature + if ($central_directory['raw']['signature'] != 0x02014B50) { + fseek($getid3->fp, $central_directory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly + return false; + } + + getid3_lib::ReadSequence('LittleEndian2Int', $central_directory['raw'], $zip_central_directory, 4, + array ( + 'create_version' => 2, + 'extract_version' => 2, + 'general_flags' => 2, + 'compression_method' => 2, + 'last_mod_file_time' => 2, + 'last_mod_file_date' => 2, + 'crc_32' => 4, + 'compressed_size' => 4, + 'uncompressed_size' => 4, + 'filename_length' => 2, + 'extra_field_length' => 2, + 'file_comment_length' => 2, + 'disk_number_start' => 2, + 'internal_file_attrib' => 2, + 'external_file_attrib' => 4, + 'local_header_offset' => 4 + ) + ); + + $central_directory['entry_offset'] = $central_directory['raw']['local_header_offset']; + $central_directory['create_version'] = sprintf('%1.1f', $central_directory['raw']['create_version'] / 10); + $central_directory['extract_version'] = sprintf('%1.1f', $central_directory['raw']['extract_version'] / 10); + $central_directory['host_os'] = $this->ZIPversionOSLookup(($central_directory['raw']['extract_version'] & 0xFF00) >> 8); + $central_directory['compression_method'] = $this->ZIPcompressionMethodLookup($central_directory['raw']['compression_method']); + $central_directory['compressed_size'] = $central_directory['raw']['compressed_size']; + $central_directory['uncompressed_size'] = $central_directory['raw']['uncompressed_size']; + $central_directory['flags'] = $this->ZIPparseGeneralPurposeFlags($central_directory['raw']['general_flags'], $central_directory['raw']['compression_method']); + $central_directory['last_modified_timestamp'] = $this->DOStime2UNIXtime($central_directory['raw']['last_mod_file_date'], $central_directory['raw']['last_mod_file_time']); + + $filename_extra_field_comment_length = $central_directory['raw']['filename_length'] + $central_directory['raw']['extra_field_length'] + $central_directory['raw']['file_comment_length']; + if ($filename_extra_field_comment_length > 0) { + $filename_extra_field_comment = fread($getid3->fp, $filename_extra_field_comment_length); + + if ($central_directory['raw']['filename_length'] > 0) { + $central_directory['filename']= substr($filename_extra_field_comment, 0, $central_directory['raw']['filename_length']); + } + if ($central_directory['raw']['extra_field_length'] > 0) { + $central_directory['raw']['extra_field_data'] = substr($filename_extra_field_comment, $central_directory['raw']['filename_length'], $central_directory['raw']['extra_field_length']); + } + if ($central_directory['raw']['file_comment_length'] > 0) { + $central_directory['file_comment'] = substr($filename_extra_field_comment, $central_directory['raw']['filename_length'] + $central_directory['raw']['extra_field_length'], $central_directory['raw']['file_comment_length']); + } + } + + return $central_directory; + } + + + + private function ZIPparseEndOfCentralDirectory() { + + // shortcut + $getid3 = $this->getid3; + + $end_of_central_directory['offset'] = ftell($getid3->fp); + + $zip_end_of_central_directory = fread($getid3->fp, 22); + + $end_of_central_directory['signature'] = getid3_lib::LittleEndian2Int(substr($zip_end_of_central_directory, 0, 4)); + + // invalid End Of Central Directory Signature + if ($end_of_central_directory['signature'] != 0x06054B50) { + fseek($getid3->fp, $end_of_central_directory['offset'], SEEK_SET); // seek back to where filepointer originally was so it can be handled properly + return false; + } + + getid3_lib::ReadSequence('LittleEndian2Int', $end_of_central_directory, $zip_end_of_central_directory, 4, + array ( + 'disk_number_current' => 2, + 'disk_number_start_directory' => 2, + 'directory_entries_this_disk' => 2, + 'directory_entries_total' => 2, + 'directory_size' => 4, + 'directory_offset' => 4, + 'comment_length' => 2 + ) + ); + + if ($end_of_central_directory['comment_length'] > 0) { + $end_of_central_directory['comment'] = fread($getid3->fp, $end_of_central_directory['comment_length']); + } + + return $end_of_central_directory; + } + + + + public static function ZIPparseGeneralPurposeFlags($flag_bytes, $compression_method) { + + $parsed_flags['encrypted'] = (bool)($flag_bytes & 0x0001); + + switch ($compression_method) { + case 6: + $parsed_flags['dictionary_size'] = (($flag_bytes & 0x0002) ? 8192 : 4096); + $parsed_flags['shannon_fano_trees'] = (($flag_bytes & 0x0004) ? 3 : 2); + break; + + case 8: + case 9: + switch (($flag_bytes & 0x0006) >> 1) { + case 0: + $parsed_flags['compression_speed'] = 'normal'; + break; + case 1: + $parsed_flags['compression_speed'] = 'maximum'; + break; + case 2: + $parsed_flags['compression_speed'] = 'fast'; + break; + case 3: + $parsed_flags['compression_speed'] = 'superfast'; + break; + } + break; + } + $parsed_flags['data_descriptor_used'] = (bool)($flag_bytes & 0x0008); + + return $parsed_flags; + } + + + + public static function ZIPversionOSLookup($index) { + + static $lookup = array ( + 0 => 'MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)', + 1 => 'Amiga', + 2 => 'OpenVMS', + 3 => 'Unix', + 4 => 'VM/CMS', + 5 => 'Atari ST', + 6 => 'OS/2 H.P.F.S.', + 7 => 'Macintosh', + 8 => 'Z-System', + 9 => 'CP/M', + 10 => 'Windows NTFS', + 11 => 'MVS', + 12 => 'VSE', + 13 => 'Acorn Risc', + 14 => 'VFAT', + 15 => 'Alternate MVS', + 16 => 'BeOS', + 17 => 'Tandem' + ); + return (isset($lookup[$index]) ? $lookup[$index] : '[unknown]'); + } + + + + public static function ZIPcompressionMethodLookup($index) { + + static $lookup = array ( + 0 => 'store', + 1 => 'shrink', + 2 => 'reduce-1', + 3 => 'reduce-2', + 4 => 'reduce-3', + 5 => 'reduce-4', + 6 => 'implode', + 7 => 'tokenize', + 8 => 'deflate', + 9 => 'deflate64', + 10 => 'PKWARE Date Compression Library Imploding' + ); + return (isset($lookup[$index]) ? $lookup[$index] : '[unknown]'); + } + + + + 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, $UNIXyear); + */ + return gmmktime(($DOStime & 0xF800) >> 11, ($DOStime & 0x07E0) >> 5, ($DOStime & 0x001F) * 2, ($DOSdate & 0x01E0) >> 5, $DOSdate & 0x001F, (($DOSdate & 0xFE00) >> 9) + 1980); + } + + + + public static function array_merge_clobber($array1, $array2) { + + // written by kcØhireability*com + // taken from http://www.php.net/manual/en/function.array-merge-recursive.php + + if (!is_array($array1) || !is_array($array2)) { + return false; + } + + $newarray = $array1; + foreach ($array2 as $key => $val) { + if (is_array($val) && isset($newarray[$key]) && is_array($newarray[$key])) { + $newarray[$key] = getid3_zip::array_merge_clobber($newarray[$key], $val); + } else { + $newarray[$key] = $val; + } + } + return $newarray; + } + + + + public static function CreateDeepArray($array_path, $separator, $value) { + + // assigns $value to a nested array path: + // $foo = getid3_lib::CreateDeepArray('/path/to/my', '/', 'file.txt') + // is the same as: + // $foo = array ('path'=>array('to'=>'array('my'=>array('file.txt')))); + // or + // $foo['path']['to']['my'] = 'file.txt'; + + while ($array_path{0} == $separator) { + $array_path = substr($array_path, 1); + } + if (($pos = strpos($array_path, $separator)) !== false) { + return array (substr($array_path, 0, $pos) => getid3_zip::CreateDeepArray(substr($array_path, $pos + 1), $separator, $value)); + } + + return array ($array_path => $value); + } + +} + + +?>
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