1327e51cbSPeter Avalos 2327e51cbSPeter Avalos#------------------------------------------------------------------------------ 3327e51cbSPeter Avalos# compress: file(1) magic for pure-compression formats (no archives) 4327e51cbSPeter Avalos# 5327e51cbSPeter Avalos# compress, gzip, pack, compact, huf, squeeze, crunch, freeze, yabba, etc. 6327e51cbSPeter Avalos# 7327e51cbSPeter Avalos# Formats for various forms of compressed data 8327e51cbSPeter Avalos# Formats for "compress" proper have been moved into "compress.c", 9327e51cbSPeter Avalos# because it tries to uncompress it to figure out what's inside. 10327e51cbSPeter Avalos 11327e51cbSPeter Avalos# standard unix compress 12327e51cbSPeter Avalos0 string \037\235 compress'd data 13*79343712SPeter Avalos!:mime application/x-compress 14*79343712SPeter Avalos!:apple LZIVZIVU 15327e51cbSPeter Avalos>2 byte&0x80 >0 block compressed 16327e51cbSPeter Avalos>2 byte&0x1f x %d bits 17327e51cbSPeter Avalos 18327e51cbSPeter Avalos# gzip (GNU zip, not to be confused with Info-ZIP or PKWARE zip archiver) 19327e51cbSPeter Avalos# Edited by Chris Chittleborough <cchittleborough@yahoo.com.au>, March 2002 20327e51cbSPeter Avalos# * Original filename is only at offset 10 if "extra field" absent 21327e51cbSPeter Avalos# * Produce shorter output - notably, only report compression methods 22327e51cbSPeter Avalos# other than 8 ("deflate", the only method defined in RFC 1952). 23327e51cbSPeter Avalos0 string \037\213 gzip compressed data 24*79343712SPeter Avalos!:mime application/x-gzip 25327e51cbSPeter Avalos>2 byte <8 \b, reserved method 26327e51cbSPeter Avalos>2 byte >8 \b, unknown method 27327e51cbSPeter Avalos>3 byte &0x01 \b, ASCII 28327e51cbSPeter Avalos>3 byte &0x02 \b, has CRC 29327e51cbSPeter Avalos>3 byte &0x04 \b, extra field 30327e51cbSPeter Avalos>3 byte&0xC =0x08 31327e51cbSPeter Avalos>>10 string x \b, was "%s" 32327e51cbSPeter Avalos>3 byte &0x10 \b, has comment 33327e51cbSPeter Avalos>9 byte =0x00 \b, from FAT filesystem (MS-DOS, OS/2, NT) 34327e51cbSPeter Avalos>9 byte =0x01 \b, from Amiga 35327e51cbSPeter Avalos>9 byte =0x02 \b, from VMS 36327e51cbSPeter Avalos>9 byte =0x03 \b, from Unix 37327e51cbSPeter Avalos>9 byte =0x04 \b, from VM/CMS 38327e51cbSPeter Avalos>9 byte =0x05 \b, from Atari 39327e51cbSPeter Avalos>9 byte =0x06 \b, from HPFS filesystem (OS/2, NT) 40327e51cbSPeter Avalos>9 byte =0x07 \b, from MacOS 41327e51cbSPeter Avalos>9 byte =0x08 \b, from Z-System 42327e51cbSPeter Avalos>9 byte =0x09 \b, from CP/M 43327e51cbSPeter Avalos>9 byte =0x0A \b, from TOPS/20 44327e51cbSPeter Avalos>9 byte =0x0B \b, from NTFS filesystem (NT) 45327e51cbSPeter Avalos>9 byte =0x0C \b, from QDOS 46327e51cbSPeter Avalos>9 byte =0x0D \b, from Acorn RISCOS 47327e51cbSPeter Avalos>3 byte &0x10 \b, comment 48327e51cbSPeter Avalos>3 byte &0x20 \b, encrypted 49327e51cbSPeter Avalos>4 ledate >0 \b, last modified: %s 50327e51cbSPeter Avalos>8 byte 2 \b, max compression 51327e51cbSPeter Avalos>8 byte 4 \b, max speed 52327e51cbSPeter Avalos 53327e51cbSPeter Avalos# packed data, Huffman (minimum redundancy) codes on a byte-by-byte basis 54327e51cbSPeter Avalos0 string \037\036 packed data 55*79343712SPeter Avalos!:mime application/octet-stream 56327e51cbSPeter Avalos>2 belong >1 \b, %d characters originally 57327e51cbSPeter Avalos>2 belong =1 \b, %d character originally 58327e51cbSPeter Avalos# 59327e51cbSPeter Avalos# This magic number is byte-order-independent. 60327e51cbSPeter Avalos0 short 0x1f1f old packed data 61*79343712SPeter Avalos!:mime application/octet-stream 62327e51cbSPeter Avalos 63327e51cbSPeter Avalos# XXX - why *two* entries for "compacted data", one of which is 64327e51cbSPeter Avalos# byte-order independent, and one of which is byte-order dependent? 65327e51cbSPeter Avalos# 66327e51cbSPeter Avalos0 short 0x1fff compacted data 67*79343712SPeter Avalos!:mime application/octet-stream 68327e51cbSPeter Avalos# This string is valid for SunOS (BE) and a matching "short" is listed 69327e51cbSPeter Avalos# in the Ultrix (LE) magic file. 70327e51cbSPeter Avalos0 string \377\037 compacted data 71*79343712SPeter Avalos!:mime application/octet-stream 72327e51cbSPeter Avalos0 short 0145405 huf output 73*79343712SPeter Avalos!:mime application/octet-stream 74327e51cbSPeter Avalos 75327e51cbSPeter Avalos# bzip2 76327e51cbSPeter Avalos0 string BZh bzip2 compressed data 77*79343712SPeter Avalos!:mime application/x-bzip2 78327e51cbSPeter Avalos>3 byte >47 \b, block size = %c00k 79327e51cbSPeter Avalos 80*79343712SPeter Avalos# lzip 81*79343712SPeter Avalos0 string LZIP lzip compressed data 82*79343712SPeter Avalos!:mime application/x-lzip 83*79343712SPeter Avalos>4 byte x \b, version: %d 84*79343712SPeter Avalos 85327e51cbSPeter Avalos# squeeze and crunch 86327e51cbSPeter Avalos# Michael Haardt <michael@cantor.informatik.rwth-aachen.de> 87327e51cbSPeter Avalos0 beshort 0x76FF squeezed data, 88327e51cbSPeter Avalos>4 string x original name %s 89327e51cbSPeter Avalos0 beshort 0x76FE crunched data, 90327e51cbSPeter Avalos>2 string x original name %s 91327e51cbSPeter Avalos0 beshort 0x76FD LZH compressed data, 92327e51cbSPeter Avalos>2 string x original name %s 93327e51cbSPeter Avalos 94327e51cbSPeter Avalos# Freeze 95327e51cbSPeter Avalos0 string \037\237 frozen file 2.1 96327e51cbSPeter Avalos0 string \037\236 frozen file 1.0 (or gzip 0.5) 97327e51cbSPeter Avalos 98327e51cbSPeter Avalos# SCO compress -H (LZH) 99327e51cbSPeter Avalos0 string \037\240 SCO compress -H (LZH) data 100327e51cbSPeter Avalos 101327e51cbSPeter Avalos# European GSM 06.10 is a provisional standard for full-rate speech 102327e51cbSPeter Avalos# transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse 103327e51cbSPeter Avalos# excitation/long term prediction) coding at 13 kbit/s. 104327e51cbSPeter Avalos# 105327e51cbSPeter Avalos# There's only a magic nibble (4 bits); that nibble repeats every 33 106327e51cbSPeter Avalos# bytes. This isn't suited for use, but maybe we can use it someday. 107327e51cbSPeter Avalos# 108327e51cbSPeter Avalos# This will cause very short GSM files to be declared as data and 109327e51cbSPeter Avalos# mismatches to be declared as data too! 110327e51cbSPeter Avalos#0 byte&0xF0 0xd0 data 111327e51cbSPeter Avalos#>33 byte&0xF0 0xd0 112327e51cbSPeter Avalos#>66 byte&0xF0 0xd0 113327e51cbSPeter Avalos#>99 byte&0xF0 0xd0 114327e51cbSPeter Avalos#>132 byte&0xF0 0xd0 GSM 06.10 compressed audio 115327e51cbSPeter Avalos 116327e51cbSPeter Avalos# bzip a block-sorting file compressor 117327e51cbSPeter Avalos# by Julian Seward <sewardj@cs.man.ac.uk> and others 118327e51cbSPeter Avalos# 119*79343712SPeter Avalos#0 string BZ bzip compressed data 120*79343712SPeter Avalos#>2 byte x \b, version: %c 121*79343712SPeter Avalos#>3 string =1 \b, compression block size 100k 122*79343712SPeter Avalos#>3 string =2 \b, compression block size 200k 123*79343712SPeter Avalos#>3 string =3 \b, compression block size 300k 124*79343712SPeter Avalos#>3 string =4 \b, compression block size 400k 125*79343712SPeter Avalos#>3 string =5 \b, compression block size 500k 126*79343712SPeter Avalos#>3 string =6 \b, compression block size 600k 127*79343712SPeter Avalos#>3 string =7 \b, compression block size 700k 128*79343712SPeter Avalos#>3 string =8 \b, compression block size 800k 129*79343712SPeter Avalos#>3 string =9 \b, compression block size 900k 130327e51cbSPeter Avalos 131327e51cbSPeter Avalos# lzop from <markus.oberhumer@jk.uni-linz.ac.at> 132327e51cbSPeter Avalos0 string \x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a lzop compressed data 133327e51cbSPeter Avalos>9 beshort <0x0940 134327e51cbSPeter Avalos>>9 byte&0xf0 =0x00 - version 0. 135327e51cbSPeter Avalos>>9 beshort&0x0fff x \b%03x, 136327e51cbSPeter Avalos>>13 byte 1 LZO1X-1, 137327e51cbSPeter Avalos>>13 byte 2 LZO1X-1(15), 138327e51cbSPeter Avalos>>13 byte 3 LZO1X-999, 139327e51cbSPeter Avalos## >>22 bedate >0 last modified: %s, 140327e51cbSPeter Avalos>>14 byte =0x00 os: MS-DOS 141327e51cbSPeter Avalos>>14 byte =0x01 os: Amiga 142327e51cbSPeter Avalos>>14 byte =0x02 os: VMS 143327e51cbSPeter Avalos>>14 byte =0x03 os: Unix 144327e51cbSPeter Avalos>>14 byte =0x05 os: Atari 145327e51cbSPeter Avalos>>14 byte =0x06 os: OS/2 146327e51cbSPeter Avalos>>14 byte =0x07 os: MacOS 147327e51cbSPeter Avalos>>14 byte =0x0A os: Tops/20 148327e51cbSPeter Avalos>>14 byte =0x0B os: WinNT 149327e51cbSPeter Avalos>>14 byte =0x0E os: Win32 150327e51cbSPeter Avalos>9 beshort >0x0939 151327e51cbSPeter Avalos>>9 byte&0xf0 =0x00 - version 0. 152327e51cbSPeter Avalos>>9 byte&0xf0 =0x10 - version 1. 153327e51cbSPeter Avalos>>9 byte&0xf0 =0x20 - version 2. 154327e51cbSPeter Avalos>>9 beshort&0x0fff x \b%03x, 155327e51cbSPeter Avalos>>15 byte 1 LZO1X-1, 156327e51cbSPeter Avalos>>15 byte 2 LZO1X-1(15), 157327e51cbSPeter Avalos>>15 byte 3 LZO1X-999, 158327e51cbSPeter Avalos## >>25 bedate >0 last modified: %s, 159327e51cbSPeter Avalos>>17 byte =0x00 os: MS-DOS 160327e51cbSPeter Avalos>>17 byte =0x01 os: Amiga 161327e51cbSPeter Avalos>>17 byte =0x02 os: VMS 162327e51cbSPeter Avalos>>17 byte =0x03 os: Unix 163327e51cbSPeter Avalos>>17 byte =0x05 os: Atari 164327e51cbSPeter Avalos>>17 byte =0x06 os: OS/2 165327e51cbSPeter Avalos>>17 byte =0x07 os: MacOS 166327e51cbSPeter Avalos>>17 byte =0x0A os: Tops/20 167327e51cbSPeter Avalos>>17 byte =0x0B os: WinNT 168327e51cbSPeter Avalos>>17 byte =0x0E os: Win32 169327e51cbSPeter Avalos 170327e51cbSPeter Avalos# 4.3BSD-Quasijarus Strong Compression 171327e51cbSPeter Avalos# http://minnie.tuhs.org/Quasijarus/compress.html 172327e51cbSPeter Avalos0 string \037\241 Quasijarus strong compressed data 173327e51cbSPeter Avalos 174327e51cbSPeter Avalos# From: Cory Dikkers <cdikkers@swbell.net> 175327e51cbSPeter Avalos0 string XPKF Amiga xpkf.library compressed data 176327e51cbSPeter Avalos0 string PP11 Power Packer 1.1 compressed data 177327e51cbSPeter Avalos0 string PP20 Power Packer 2.0 compressed data, 178327e51cbSPeter Avalos>4 belong 0x09090909 fast compression 179327e51cbSPeter Avalos>4 belong 0x090A0A0A mediocre compression 180327e51cbSPeter Avalos>4 belong 0x090A0B0B good compression 181327e51cbSPeter Avalos>4 belong 0x090A0C0C very good compression 182327e51cbSPeter Avalos>4 belong 0x090A0C0D best compression 183327e51cbSPeter Avalos 184327e51cbSPeter Avalos# 7-zip archiver, from Thomas Klausner (wiz@danbala.tuwien.ac.at) 185327e51cbSPeter Avalos# http://www.7-zip.org or DOC/7zFormat.txt 186327e51cbSPeter Avalos# 187327e51cbSPeter Avalos0 string 7z\274\257\047\034 7-zip archive data, 188327e51cbSPeter Avalos>6 byte x version %d 189327e51cbSPeter Avalos>7 byte x \b.%d 190327e51cbSPeter Avalos 191*79343712SPeter Avalos# Type: LZMA 192*79343712SPeter Avalos# URL: http://www.7-zip.org/sdk.html 193*79343712SPeter Avalos# From: Robert Millan <rmh@aybabtu.com> and Reuben Thomas <rrt@sc3d.org> 194*79343712SPeter Avalos# Commented out because apparently not reliable (according to Debian 195*79343712SPeter Avalos# bug #364260) 196*79343712SPeter Avalos#0 string ]\000\000\200\000 LZMA compressed data 197*79343712SPeter Avalos 198*79343712SPeter Avalos# http://tukaani.org/xz/xz-file-format.txt 199*79343712SPeter Avalos0 ustring \xFD7zXZ\x00 xz compressed data 200*79343712SPeter Avalos!:mime application/x-xz 201*79343712SPeter Avalos 202327e51cbSPeter Avalos# AFX compressed files (Wolfram Kleff) 203327e51cbSPeter Avalos2 string -afx- AFX compressed file data 204327e51cbSPeter Avalos 205327e51cbSPeter Avalos# Supplementary magic data for the file(1) command to support 206327e51cbSPeter Avalos# rzip(1). The format is described in magic(5). 207327e51cbSPeter Avalos# 208327e51cbSPeter Avalos# Copyright (C) 2003 by Andrew Tridgell. You may do whatever you want with 209327e51cbSPeter Avalos# this file. 210327e51cbSPeter Avalos# 211327e51cbSPeter Avalos0 string RZIP rzip compressed data 212327e51cbSPeter Avalos>4 byte x - version %d 213327e51cbSPeter Avalos>5 byte x \b.%d 214327e51cbSPeter Avalos>6 belong x (%d bytes) 215*79343712SPeter Avalos 216*79343712SPeter Avalos# Type: XZ 217*79343712SPeter Avalos# URL: http://tukaani.org/xz/ 218*79343712SPeter Avalos0 string \xfd\x37\x7a\x58\x5a\x00 XZ compressed data 219*79343712SPeter Avalos!:mime application/x-xz 220