1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
#------------------------------------------------------------------------------
# compress: file(1) magic for pure-compression formats (no archives)
#
# compress, gzip, pack, compact, huf, squeeze, crunch, freeze, yabba, etc.
#
# Formats for various forms of compressed data
# Formats for "compress" proper have been moved into "compress.c",
# because it tries to uncompress it to figure out what's inside.
# standard unix compress
0 string \037\235 compress'd data
>2 byte&0x80 >0 block compressed
>2 byte&0x1f x %d bits
# gzip (GNU zip, not to be confused with Info-ZIP or PKWARE zip archiver)
# Edited by Chris Chittleborough <cchittleborough@yahoo.com.au>, March 2002
# * Original filename is only at offset 10 if "extra field" absent
# * Produce shorter output - notably, only report compression methods
# other than 8 ("deflate", the only method defined in RFC 1952).
0 string \037\213 gzip compressed data
>2 byte <8 \b, reserved method
>2 byte >8 \b, unknown method
>3 byte &0x01 \b, ASCII
>3 byte &0x02 \b, continuation
>3 byte &0x04 \b, extra field
>3 byte&0xC =0x08
>>10 string x \b, was "%s"
>9 byte =0x00 \b, from MS-DOS
>9 byte =0x01 \b, from Amiga
>9 byte =0x02 \b, from VMS
>9 byte =0x03 \b, from Unix
>9 byte =0x05 \b, from Atari
>9 byte =0x06 \b, from OS/2
>9 byte =0x07 \b, from MacOS
>9 byte =0x0A \b, from Tops/20
>9 byte =0x0B \b, from Win/32
>3 byte &0x10 \b, comment
>3 byte &0x20 \b, encrypted
### >4 ledate x last modified: %s,
>8 byte 2 \b, max compression
>8 byte 4 \b, max speed
# packed data, Huffman (minimum redundancy) codes on a byte-by-byte basis
0 string \037\036 packed data
>2 belong >1 \b, %d characters originally
>2 belong =1 \b, %d character originally
#
# This magic number is byte-order-independent.
0 short 0x1f1f old packed data
# XXX - why *two* entries for "compacted data", one of which is
# byte-order independent, and one of which is byte-order dependent?
#
0 short 0x1fff compacted data
# This string is valid for SunOS (BE) and a matching "short" is listed
# in the Ultrix (LE) magic file.
0 string \377\037 compacted data
0 short 0145405 huf output
# bzip2
0 string BZh bzip2 compressed data
>3 byte >47 \b, block size = %c00k
# squeeze and crunch
# Michael Haardt <michael@cantor.informatik.rwth-aachen.de>
0 beshort 0x76FF squeezed data,
>4 string x original name %s
0 beshort 0x76FE crunched data,
>2 string x original name %s
0 beshort 0x76FD LZH compressed data,
>2 string x original name %s
# Freeze
0 string \037\237 frozen file 2.1
0 string \037\236 frozen file 1.0 (or gzip 0.5)
# SCO compress -H (LZH)
0 string \037\240 SCO compress -H (LZH) data
# European GSM 06.10 is a provisional standard for full-rate speech
# transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse
# excitation/long term prediction) coding at 13 kbit/s.
#
# There's only a magic nibble (4 bits); that nibble repeats every 33
# bytes. This isn't suited for use, but maybe we can use it someday.
#
# This will cause very short GSM files to be declared as data and
# mismatches to be declared as data too!
#0 byte&0xF0 0xd0 data
#>33 byte&0xF0 0xd0
#>66 byte&0xF0 0xd0
#>99 byte&0xF0 0xd0
#>132 byte&0xF0 0xd0 GSM 06.10 compressed audio
# bzip a block-sorting file compressor
# by Julian Seward <sewardj@cs.man.ac.uk> and others
#
0 string BZ bzip compressed data
>2 byte x \b, version: %c
>3 string =1 \b, compression block size 100k
>3 string =2 \b, compression block size 200k
>3 string =3 \b, compression block size 300k
>3 string =4 \b, compression block size 400k
>3 string =5 \b, compression block size 500k
>3 string =6 \b, compression block size 600k
>3 string =7 \b, compression block size 700k
>3 string =8 \b, compression block size 800k
>3 string =9 \b, compression block size 900k
# lzop from <markus.oberhumer@jk.uni-linz.ac.at>
0 string \x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a lzop compressed data
>9 beshort <0x0940
>>9 byte&0xf0 =0x00 - version 0.
>>9 beshort&0x0fff x \b%03x,
>>13 byte 1 LZO1X-1,
>>13 byte 2 LZO1X-1(15),
>>13 byte 3 LZO1X-999,
## >>22 bedate >0 last modified: %s,
>>14 byte =0x00 os: MS-DOS
>>14 byte =0x01 os: Amiga
>>14 byte =0x02 os: VMS
>>14 byte =0x03 os: Unix
>>14 byte =0x05 os: Atari
>>14 byte =0x06 os: OS/2
>>14 byte =0x07 os: MacOS
>>14 byte =0x0A os: Tops/20
>>14 byte =0x0B os: WinNT
>>14 byte =0x0E os: Win32
>9 beshort >0x0939
>>9 byte&0xf0 =0x00 - version 0.
>>9 byte&0xf0 =0x10 - version 1.
>>9 byte&0xf0 =0x20 - version 2.
>>9 beshort&0x0fff x \b%03x,
>>15 byte 1 LZO1X-1,
>>15 byte 2 LZO1X-1(15),
>>15 byte 3 LZO1X-999,
## >>25 bedate >0 last modified: %s,
>>17 byte =0x00 os: MS-DOS
>>17 byte =0x01 os: Amiga
>>17 byte =0x02 os: VMS
>>17 byte =0x03 os: Unix
>>17 byte =0x05 os: Atari
>>17 byte =0x06 os: OS/2
>>17 byte =0x07 os: MacOS
>>17 byte =0x0A os: Tops/20
>>17 byte =0x0B os: WinNT
>>17 byte =0x0E os: Win32
# 4.3BSD-Quasijarus Strong Compression
# http://minnie.tuhs.org/Quasijarus/compress.html
0 string \037\241 Quasijarus strong compressed data
# From: Cory Dikkers <cdikkers@swbell.net>
0 string XPKF Amiga xpkf.library compressed data
0 string PP11 Power Packer 1.1 compressed data
0 string PP20 Power Packer 2.0 compressed data,
>4 belong 0x09090909 fast compression
>4 belong 0x090A0A0A mediocre compression
>4 belong 0x090A0B0B good compression
>4 belong 0x090A0C0C very good compression
>4 belong 0x090A0C0D best compression
# 7z archiver, from Thomas Klausner (wiz@danbala.tuwien.ac.at)
# http://www.7-zip.org or DOC/7zFormat.txt
#
0 string 7z\274\257\047\034 7z archive data,
>6 byte x version %d
>7 byte x \b.%d
# AFX compressed files (Wolfram Kleff)
2 string -afx- AFX compressed file data
|
