1#------------------------------------------------------------------------------ 2# $File: zip,v 1.8 2021/10/24 15:53:56 christos Exp $ 3# zip: file(1) magic for zip files; this is not use 4# Note the version of magic in archive is currently stronger, this is 5# just an example until negative offsets are supported better 6# Note: All fields unless otherwise noted are unsigned! 7 8# Zip Central Directory record 90 name zipcd 10>0 string PK\001\002 Zip archive data 11!:mime application/zip 12# no "made by" in local file header with PK\3\4 magic 13>>4 leshort x \b, made by 14>>4 use zipversion 15>>4 use ziphost 16# inside ./archive 1.151 called "at least" zipversion "to extract" 17>>6 leshort x \b, extract using at least 18>>6 use zipversion 19# This is DOS date like: ledate 21:00:48 19 Dec 2001 != DOS 00:00 1 Jan 2010 ~ 0000213C 20>>12 ulelong x \b, last modified 21>>14 lemsdosdate x \b, last modified %s 22>>12 lemsdostime x %s 23# uncompressed size of 1st entry; FFffFFff means real value stored in ZIP64 record 24>>24 ulelong !0xFFffFFff \b, uncompressed size %u 25# inside ./archive 1.151 called "compression method="zipcompression 26>>10 leshort x \b, method= 27>>10 use zipcompression 28 29# URL: https://en.wikipedia.org/wiki/Zip_(file_format) 30# reference: https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT (Version: 6.3.9) 31# Zip known compressions 320 name zipcompression 33>0 leshort 0 \bstore 34>0 leshort 1 \bShrinking 35>0 leshort 6 \bImploding 36>0 leshort 7 \bTokenizing 37>0 leshort 8 \bdeflate 38>0 leshort 9 \bdeflate64 39>0 leshort 10 \bLibrary imploding 40#>0 leshort 11 \bReserved by PKWARE 41>0 leshort 12 \bbzip2 42#>0 leshort 13 \bReserved by PKWARE 43>0 leshort 14 \blzma 44#>0 leshort 15 \bReserved by PKWARE 45>0 leshort 16 \bCMPSC (IBM z/OS) 46#>0 leshort 17 \bReserved by PKWARE 47>0 leshort 18 \bIBM TERSE 48>0 leshort 19 \bIBM LZ77 (z/Architecture) 49>0 leshort 20 \bZstd (deprecated) 50>0 leshort 93 \bZstd 51>0 leshort 94 \bMP3 52>0 leshort 95 \bxz 53>0 leshort 96 \bJpeg 54>0 leshort 97 \bWavPack 55>0 leshort 98 \bPPMd 56>0 leshort 99 \bAES Encrypted 57>0 default x 58>>0 leshort x \b[%#x] 59 60# Zip known versions 610 name zipversion 62# The lower byte indicates the ZIP version of this file. The value/10 indicates 63# the major version number, and the value mod 10 is the minor version number. 64>0 ubyte/10 x v%u 65>0 ubyte%10 x \b.%u 66# >0 leshort 0x09 v0.9 67# >0 leshort 0x0a v1.0 68# >0 leshort 0x0b v1.1 69# >0 leshort 0x14 v2.0 70# >0 leshort 0x15 v2.1 71# >0 leshort 0x19 v2.5 72# >0 leshort 0x1b v2.7 73# >0 leshort 0x2d v4.5 74# >0 leshort 0x2e v4.6 75# >0 leshort 0x32 v5.0 76# >0 leshort 0x33 v5.1 77# >0 leshort 0x34 v5.2 78# >0 leshort 0x3d v6.1 79# >0 leshort 0x3e v6.2 80# >0 leshort 0x3f v6.3 81# >0 default x 82# >>0 leshort x v?[%#x] 83 84# display compatible host system name of ZIP archive 850 name ziphost 86# The upper byte indicates the compatibility of the file attribute information. 87# If the file is compatible with MS-DOS (v 2.04g) then this value will be zero. 88#>1 ubyte 0 DOS 89>1 ubyte 1 Amiga 90>1 ubyte 2 OpenVMS 91>1 ubyte 3 UNIX 92>1 ubyte 4 VM/CMS 93>1 ubyte 6 OS/2 94>1 ubyte 7 Macintosh 95>1 ubyte 11 MVS 96>1 ubyte 13 Acorn Risc 97>1 ubyte 16 BeOS 98>1 ubyte 17 Tandem 99# 9 untested 100>1 ubyte 5 Atari ST 101>1 ubyte 8 Z-System 102>1 ubyte 9 CP/M 103>1 ubyte 10 Windows NTFS 104>1 ubyte 12 VSE 105>1 ubyte 14 VFAT 106>1 ubyte 15 alternate MVS 107>1 ubyte 18 OS/400 108>1 ubyte 19 OS X 109# unused 110#>1 ubyte >19 unused %#x 111 112# Zip End Of Central Directory record 113# GRR: wrong for ZIP with comment archive 114-22 string PK\005\006 115#>4 uleshort !0xFFff \b, %u disks 116#>6 uleshort !0xFFff \b, central directory disk %u 117#>8 uleshort !0xFFff \b, %u central directories on this disk 118#>10 uleshort !0xFFff \b, %u central directories 119#>12 ulelong !0xFFffFFff \b, %u central directory bytes 120# offset of central directory 121#>16 ulelong x \b, central directory offset %#x 122>(16.l) use zipcd 123# archive comment length n 124#>>20 uleshort >0 \b, comment length %u 125# archive comment 126>>20 pstring/l >0 \b, %s 127