1#------------------------------------------------------------------------------ 2# $File: compress,v 1.82 2021/06/30 08:11:29 christos Exp $ 3# compress: file(1) magic for pure-compression formats (no archives) 4# 5# compress, gzip, pack, compact, huf, squeeze, crunch, freeze, yabba, etc. 6# 7# Formats for various forms of compressed data 8# Formats for "compress" proper have been moved into "compress.c", 9# because it tries to uncompress it to figure out what's inside. 10 11# standard unix compress 120 string \037\235 compress'd data 13!:mime application/x-compress 14!:apple LZIVZIVU 15>2 byte&0x80 >0 block compressed 16>2 byte&0x1f x %d bits 17 18# gzip (GNU zip, not to be confused with Info-ZIP or PKWARE zip archiver) 19# URL: https://en.wikipedia.org/wiki/Gzip 20# Reference: https://tools.ietf.org/html/rfc1952 21# Update: Joerg Jenderek, Apr 2019 22# Edited by Chris Chittleborough <cchittleborough@yahoo.com.au>, March 2002 23# * Original filename is only at offset 10 if "extra field" absent 24# * Produce shorter output - notably, only report compression methods 25# other than 8 ("deflate", the only method defined in RFC 1952). 26# Note: find defs -iname '*.trid.xml' -exec grep -q '<Bytes>1F8B08' {} \; -ls 27# TODO: 28# FBR Blueberry FlashBack screen Record https://www.flashbackrecorder.com/ 29# KPR KOffice/Calligra KPresenter application/x-kpresenter 30# KPT KOffice/Calligra KPresenter template? application/x-kpresenter 31# SAV Diggles Saved Game File http://www.innonics.com 32# SAV FarCry (demo) saved game http://www.farcry-thegame.com 33# DAT ZOAGZIP game data format http://en.wikipedia.org/wiki/SD_Gundam_Capsule_Fighter 340 string \037\213 35# to display gzip compressed (strength=100=2*50) before other (strength=50)? 36#!:strength * 2 37# no FNAME and FCOMMENT bit implies no file name/comment. That means only binary 38>3 byte&0x18 =0 39# For binary gzipped no ASCII text should occur 40# mcd-monu-cad.trid.xml 41>>10 string MCD Monu-Cad Drawing, Component or Font 42#>>36 string Created\ with\ MONU-CAD 43#!:mime application/octet-stream 44# http://fileformats.archiveteam.org/wiki/Monu-CAD 45# http://www.monucad.com/downloads/FullDemo-2005.EXE 46# /HANDS96.MCC Component 47# /DEMO_DD01.MCD Drawing 48# /MCALF020.FNT Font 49!:ext mcc/mcd/fnt 50# http://www.generalcadd.com 51>>10 string GXD General CADD, Drawing or Component 52#!:mime application/octet-stream 53# /gxc/BUILDINGEDGE.gxc Component 54# /gxd/HOCKETT-STPAUL-WRHSE.gxd Drawing 55# /gxd/POWERLAND-MILL-ADD-11.gxd Drawing v9.1.06 56!:ext gxc/gxd 57#>>>13 ubyte 0 \b, version 0 58>>>13 string 09 \b, version 9 59# other gzipped binary like gzipped tar, VirtualBox extension package,... 60>>10 default x gzip compressed data 61!:mime application/gzip 62>>>0 use gzip-info 63# size of the original (uncompressed) input data modulo 2^32 64>>-0 offset >48 65>>>-4 ulelong x \b, original size modulo 2^32 %u 66>>-0 offset <48 \b, truncated 67# gzipped TAR or VirtualBox extension package 68#!:mime application/x-compressed-tar 69#!:mime application/x-virtualbox-vbox-extpack 70# https://www.w3.org/TR/SVG/mimereg.html 71#!:mime image/image/svg+xml-compressed 72# zlib.3.gz 73# microcode-20180312.tgz 74# tpz same as tgz 75# lua-md5_1.2-1_i386_i486.ipk https://en.wikipedia.org/wiki/Opkg 76# Oracle_VM_VirtualBox_Extension_Pack-5.0.12-104815.vbox-extpack 77!:ext gz/tgz/tpz/ipk/vbox-extpack/svgz 78# FNAME/FCOMMENT bit implies file name/comment as iso-8859-1 text 79>3 byte&0x18 >0 gzip compressed data 80!:mime application/gzip 81# gzipped tar, gzipped Abiword document 82#!:mime application/x-compressed-tar 83#!:mime application/x-abiword-compressed 84#!:mime image/image/svg+xml-compressed 85# kleopatra_splashscreen.svgz gzipped .svg 86!:ext gz/tgz/tpz/zabw/svgz 87>>0 use gzip-info 88# size of the original (uncompressed) input data modulo 2^32 89>>-0 offset >48 90>>>-4 ulelong x \b, original size modulo 2^32 %u 91>>-0 offset <48 \b, truncated 92# display information of gzip compressed files 930 name gzip-info 94#>2 byte x THIS iS GZIP 95>2 byte <8 \b, reserved method 96>2 byte >8 \b, unknown method 97>3 byte &0x01 \b, ASCII 98>3 byte &0x02 \b, has CRC 99>3 byte &0x04 \b, extra field 100>3 byte&0xC =0x08 101>>10 string x \b, was "%s" 102>3 byte &0x10 \b, has comment 103>3 byte &0x20 \b, encrypted 104>4 ledate >0 \b, last modified: %s 105>8 byte 2 \b, max compression 106>8 byte 4 \b, max speed 107>9 byte =0x00 \b, from FAT filesystem (MS-DOS, OS/2, NT) 108>9 byte =0x01 \b, from Amiga 109>9 byte =0x02 \b, from VMS 110>9 byte =0x03 \b, from Unix 111>9 byte =0x04 \b, from VM/CMS 112>9 byte =0x05 \b, from Atari 113>9 byte =0x06 \b, from HPFS filesystem (OS/2, NT) 114>9 byte =0x07 \b, from MacOS 115>9 byte =0x08 \b, from Z-System 116>9 byte =0x09 \b, from CP/M 117>9 byte =0x0A \b, from TOPS/20 118>9 byte =0x0B \b, from NTFS filesystem (NT) 119>9 byte =0x0C \b, from QDOS 120>9 byte =0x0D \b, from Acorn RISCOS 121# size of the original (uncompressed) input data modulo 2^32 122#>-4 ulelong x \b, original size modulo 2^32 %u 123#ERROR: line 114: non zero offset 1048572 at level 1 124 125# packed data, Huffman (minimum redundancy) codes on a byte-by-byte basis 1260 string \037\036 packed data 127!:mime application/octet-stream 128>2 belong >1 \b, %d characters originally 129>2 belong =1 \b, %d character originally 130# 131# This magic number is byte-order-independent. 1320 short 0x1f1f old packed data 133!:mime application/octet-stream 134 135# XXX - why *two* entries for "compacted data", one of which is 136# byte-order independent, and one of which is byte-order dependent? 137# 1380 short 0x1fff compacted data 139!:mime application/octet-stream 140# This string is valid for SunOS (BE) and a matching "short" is listed 141# in the Ultrix (LE) magic file. 1420 string \377\037 compacted data 143!:mime application/octet-stream 1440 short 0145405 huf output 145!:mime application/octet-stream 146 147# bzip2 1480 string BZh bzip2 compressed data 149!:mime application/x-bzip2 150>3 byte >47 \b, block size = %c00k 151 152# bzip a block-sorting file compressor 153# by Julian Seward <sewardj@cs.man.ac.uk> and others 1540 string BZ0 bzip compressed data 155!:mime application/x-bzip 156>3 byte >47 \b, block size = %c00k 157 158# lzip 1590 string LZIP lzip compressed data 160!:mime application/x-lzip 161>4 byte x \b, version: %d 162 163# squeeze and crunch 164# Michael Haardt <michael@cantor.informatik.rwth-aachen.de> 1650 beshort 0x76FF squeezed data, 166>4 string x original name %s 1670 beshort 0x76FE crunched data, 168>2 string x original name %s 1690 beshort 0x76FD LZH compressed data, 170>2 string x original name %s 171 172# Freeze 1730 string \037\237 frozen file 2.1 1740 string \037\236 frozen file 1.0 (or gzip 0.5) 175 176# SCO compress -H (LZH) 1770 string \037\240 SCO compress -H (LZH) data 178 179# European GSM 06.10 is a provisional standard for full-rate speech 180# transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse 181# excitation/long term prediction) coding at 13 kbit/s. 182# 183# There's only a magic nibble (4 bits); that nibble repeats every 33 184# bytes. This isn't suited for use, but maybe we can use it someday. 185# 186# This will cause very short GSM files to be declared as data and 187# mismatches to be declared as data too! 188#0 byte&0xF0 0xd0 data 189#>33 byte&0xF0 0xd0 190#>66 byte&0xF0 0xd0 191#>99 byte&0xF0 0xd0 192#>132 byte&0xF0 0xd0 GSM 06.10 compressed audio 193 194# lzop from <markus.oberhumer@jk.uni-linz.ac.at> 1950 string \x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a lzop compressed data 196>9 beshort <0x0940 197>>9 byte&0xf0 =0x00 - version 0. 198>>9 beshort&0x0fff x \b%03x, 199>>13 byte 1 LZO1X-1, 200>>13 byte 2 LZO1X-1(15), 201>>13 byte 3 LZO1X-999, 202## >>22 bedate >0 last modified: %s, 203>>14 byte =0x00 os: MS-DOS 204>>14 byte =0x01 os: Amiga 205>>14 byte =0x02 os: VMS 206>>14 byte =0x03 os: Unix 207>>14 byte =0x05 os: Atari 208>>14 byte =0x06 os: OS/2 209>>14 byte =0x07 os: MacOS 210>>14 byte =0x0A os: Tops/20 211>>14 byte =0x0B os: WinNT 212>>14 byte =0x0E os: Win32 213>9 beshort >0x0939 214>>9 byte&0xf0 =0x00 - version 0. 215>>9 byte&0xf0 =0x10 - version 1. 216>>9 byte&0xf0 =0x20 - version 2. 217>>9 beshort&0x0fff x \b%03x, 218>>15 byte 1 LZO1X-1, 219>>15 byte 2 LZO1X-1(15), 220>>15 byte 3 LZO1X-999, 221## >>25 bedate >0 last modified: %s, 222>>17 byte =0x00 os: MS-DOS 223>>17 byte =0x01 os: Amiga 224>>17 byte =0x02 os: VMS 225>>17 byte =0x03 os: Unix 226>>17 byte =0x05 os: Atari 227>>17 byte =0x06 os: OS/2 228>>17 byte =0x07 os: MacOS 229>>17 byte =0x0A os: Tops/20 230>>17 byte =0x0B os: WinNT 231>>17 byte =0x0E os: Win32 232 233# 4.3BSD-Quasijarus Strong Compression 234# https://minnie.tuhs.org/Quasijarus/compress.html 2350 string \037\241 Quasijarus strong compressed data 236 237# From: Cory Dikkers <cdikkers@swbell.net> 2380 string XPKF Amiga xpkf.library compressed data 2390 string PP11 Power Packer 1.1 compressed data 2400 string PP20 Power Packer 2.0 compressed data, 241>4 belong 0x09090909 fast compression 242>4 belong 0x090A0A0A mediocre compression 243>4 belong 0x090A0B0B good compression 244>4 belong 0x090A0C0C very good compression 245>4 belong 0x090A0C0D best compression 246 247# 7-zip archiver, from Thomas Klausner (wiz@danbala.tuwien.ac.at) 248# https://www.7-zip.org or DOC/7zFormat.txt 249# 2500 string 7z\274\257\047\034 7-zip archive data, 251>6 byte x version %d 252>7 byte x \b.%d 253!:mime application/x-7z-compressed 254!:ext 7z/cb7 255 256# Type: LZMA 2570 lelong&0xffffff =0x5d 258>12 leshort 0xff LZMA compressed data, 259!:mime application/x-lzma 260>>5 lequad =0xffffffffffffffff streamed 261>>5 lequad !0xffffffffffffffff non-streamed, size %lld 262>12 leshort 0 LZMA compressed data, 263>>5 lequad =0xffffffffffffffff streamed 264>>5 lequad !0xffffffffffffffff non-streamed, size %lld 265 266# http://tukaani.org/xz/xz-file-format.txt 2670 ustring \xFD7zXZ\x00 XZ compressed data, checksum 268!:strength * 2 269!:mime application/x-xz 270>7 byte&0xf 0x0 NONE 271>7 byte&0xf 0x1 CRC32 272>7 byte&0xf 0x4 CRC64 273>7 byte&0xf 0xa SHA-256 274 275# https://github.com/ckolivas/lrzip/blob/master/doc/magic.header.txt 2760 string LRZI LRZIP compressed data 277>4 byte x - version %d 278>5 byte x \b.%d 279>22 byte 1 \b, encrypted 280!:mime application/x-lrzip 281 282# https://fastcompression.blogspot.fi/2013/04/lz4-streaming-format-final.html 2830 lelong 0x184d2204 LZ4 compressed data (v1.4+) 284!:mime application/x-lz4 285# Added by osm0sis@xda-developers.com 2860 lelong 0x184c2103 LZ4 compressed data (v1.0-v1.3) 287!:mime application/x-lz4 2880 lelong 0x184c2102 LZ4 compressed data (v0.1-v0.9) 289!:mime application/x-lz4 290 291# Zstandard/LZ4 skippable frames 292# https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md 2930 lelong&0xFFFFFFF0 0x184D2A50 294>(4.l+8) indirect x 295 296# Zstandard Dictionary ID subroutine 2970 name zstd-dictionary-id 298# Single Segment = True 299>0 byte &0x20 \b, Dictionary ID: 300>>0 byte&0x03 0 None 301>>0 byte&0x03 1 302>>>1 byte x %u 303>>0 byte&0x03 2 304>>>1 leshort x %u 305>>0 byte&0x03 3 306>>>1 lelong x %u 307# Single Segment = False 308>0 byte ^0x20 \b, Dictionary ID: 309>>0 byte&0x03 0 None 310>>0 byte&0x03 1 311>>>2 byte x %u 312>>0 byte&0x03 2 313>>>2 leshort x %u 314>>0 byte&0x03 3 315>>>2 lelong x %u 316 317# Zstandard compressed data 318# https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md 3190 lelong 0xFD2FB522 Zstandard compressed data (v0.2) 320!:mime application/zstd 3210 lelong 0xFD2FB523 Zstandard compressed data (v0.3) 322!:mime application/zstd 3230 lelong 0xFD2FB524 Zstandard compressed data (v0.4) 324!:mime application/zstd 3250 lelong 0xFD2FB525 Zstandard compressed data (v0.5) 326!:mime application/zstd 3270 lelong 0xFD2FB526 Zstandard compressed data (v0.6) 328!:mime application/zstd 3290 lelong 0xFD2FB527 Zstandard compressed data (v0.7) 330!:mime application/zstd 331>4 use zstd-dictionary-id 3320 lelong 0xFD2FB528 Zstandard compressed data (v0.8+) 333!:mime application/zstd 334>4 use zstd-dictionary-id 335 336# https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md 3370 lelong 0xEC30A437 Zstandard dictionary 338!:mime application/x-std-dictionary 339>4 lelong x (ID %u) 340 341# AFX compressed files (Wolfram Kleff) 3422 string -afx- AFX compressed file data 343 344# Supplementary magic data for the file(1) command to support 345# rzip(1). The format is described in magic(5). 346# 347# Copyright (C) 2003 by Andrew Tridgell. You may do whatever you want with 348# this file. 349# 3500 string RZIP rzip compressed data 351>4 byte x - version %d 352>5 byte x \b.%d 353>6 belong x (%d bytes) 354 3550 string ArC\x01 FreeArc archive <http://freearc.org> 356 357# Type: DACT compressed files 3580 long 0x444354C3 DACT compressed data 359>4 byte >-1 (version %i. 360>5 byte >-1 %i. 361>6 byte >-1 %i) 362>7 long >0 , original size: %i bytes 363>15 long >30 , block size: %i bytes 364 365# Valve Pack (VPK) files 3660 lelong 0x55aa1234 Valve Pak file 367>0x4 lelong x \b, version %u 368>0x8 lelong x \b, %u entries 369 370# Snappy framing format 371# https://code.google.com/p/snappy/source/browse/trunk/framing_format.txt 3720 string \377\006\0\0sNaPpY snappy framed data 373!:mime application/x-snappy-framed 374 375# qpress, https://www.quicklz.com/ 3760 string qpress10 qpress compressed data 377!:mime application/x-qpress 378 379# Zlib https://www.ietf.org/rfc/rfc6713.txt 3800 string/b x 381>0 beshort%31 =0 382>>0 byte&0xf =8 383>>>0 byte&0x80 =0 zlib compressed data 384!:mime application/zlib 385 386# BWC compression 3870 string BWC 388>3 byte 0 BWC compressed data 389 390# UCL compression 3910 bequad 0x00e955434cff011a UCL compressed data 392 393# Softlib archive 3940 string SLIB Softlib archive 395>4 leshort x \b, version %d 396>6 leshort x (contains %d files) 397 398# URL: https://github.com/lzfse/lzfse/blob/master/src/lzfse_internal.h#L276 399# From: Eric Hall <eric.hall@darkart.com> 4000 string bvx- lzfse encoded, no compression 4010 string bvx1 lzfse compressed, uncompressed tables 4020 string bvx2 lzfse compressed, compressed tables 4030 string bvxn lzfse encoded, lzvn compressed 404 405# pcxLib.exe compression program 406# http://www.shikadi.net/moddingwiki/PCX_Library 4070 string/b pcxLib 408>0x0A string/b Copyright\020(c)\020Genus\020Microprogramming,\020Inc. pcxLib compressed 409