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Diffstat (limited to 'magic/Magdir/zip')
| -rw-r--r-- | magic/Magdir/zip | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/magic/Magdir/zip b/magic/Magdir/zip new file mode 100644 index 0000000..abf5284 --- /dev/null +++ b/magic/Magdir/zip @@ -0,0 +1,126 @@ +#------------------------------------------------------------------------------ +# $File: zip,v 1.8 2021/10/24 15:53:56 christos Exp $ +# zip: file(1) magic for zip files; this is not use +# Note the version of magic in archive is currently stronger, this is +# just an example until negative offsets are supported better +# Note: All fields unless otherwise noted are unsigned! + +# Zip Central Directory record +0 name zipcd +>0 string PK\001\002 Zip archive data +!:mime application/zip +# no "made by" in local file header with PK\3\4 magic +>>4 leshort x \b, made by +>>4 use zipversion +>>4 use ziphost +# inside ./archive 1.151 called "at least" zipversion "to extract" +>>6 leshort x \b, extract using at least +>>6 use zipversion +# This is DOS date like: ledate 21:00:48 19 Dec 2001 != DOS 00:00 1 Jan 2010 ~ 0000213C +>>12 ulelong x \b, last modified +>>14 lemsdosdate x \b, last modified %s +>>12 lemsdostime x %s +# uncompressed size of 1st entry; FFffFFff means real value stored in ZIP64 record +>>24 ulelong !0xFFffFFff \b, uncompressed size %u +# inside ./archive 1.151 called "compression method="zipcompression +>>10 leshort x \b, method= +>>10 use zipcompression + +# URL: https://en.wikipedia.org/wiki/Zip_(file_format) +# reference: https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT (Version: 6.3.9) +# Zip known compressions +0 name zipcompression +>0 leshort 0 \bstore +>0 leshort 1 \bShrinking +>0 leshort 6 \bImploding +>0 leshort 7 \bTokenizing +>0 leshort 8 \bdeflate +>0 leshort 9 \bdeflate64 +>0 leshort 10 \bLibrary imploding +#>0 leshort 11 \bReserved by PKWARE +>0 leshort 12 \bbzip2 +#>0 leshort 13 \bReserved by PKWARE +>0 leshort 14 \blzma +#>0 leshort 15 \bReserved by PKWARE +>0 leshort 16 \bCMPSC (IBM z/OS) +#>0 leshort 17 \bReserved by PKWARE +>0 leshort 18 \bIBM TERSE +>0 leshort 19 \bIBM LZ77 (z/Architecture) +>0 leshort 20 \bZstd (deprecated) +>0 leshort 93 \bZstd +>0 leshort 94 \bMP3 +>0 leshort 95 \bxz +>0 leshort 96 \bJpeg +>0 leshort 97 \bWavPack +>0 leshort 98 \bPPMd +>0 leshort 99 \bAES Encrypted +>0 default x +>>0 leshort x \b[%#x] + +# Zip known versions +0 name zipversion +# The lower byte indicates the ZIP version of this file. The value/10 indicates +# the major version number, and the value mod 10 is the minor version number. +>0 ubyte/10 x v%u +>0 ubyte%10 x \b.%u +# >0 leshort 0x09 v0.9 +# >0 leshort 0x0a v1.0 +# >0 leshort 0x0b v1.1 +# >0 leshort 0x14 v2.0 +# >0 leshort 0x15 v2.1 +# >0 leshort 0x19 v2.5 +# >0 leshort 0x1b v2.7 +# >0 leshort 0x2d v4.5 +# >0 leshort 0x2e v4.6 +# >0 leshort 0x32 v5.0 +# >0 leshort 0x33 v5.1 +# >0 leshort 0x34 v5.2 +# >0 leshort 0x3d v6.1 +# >0 leshort 0x3e v6.2 +# >0 leshort 0x3f v6.3 +# >0 default x +# >>0 leshort x v?[%#x] + +# display compatible host system name of ZIP archive +0 name ziphost +# The upper byte indicates the compatibility of the file attribute information. +# If the file is compatible with MS-DOS (v 2.04g) then this value will be zero. +#>1 ubyte 0 DOS +>1 ubyte 1 Amiga +>1 ubyte 2 OpenVMS +>1 ubyte 3 UNIX +>1 ubyte 4 VM/CMS +>1 ubyte 6 OS/2 +>1 ubyte 7 Macintosh +>1 ubyte 11 MVS +>1 ubyte 13 Acorn Risc +>1 ubyte 16 BeOS +>1 ubyte 17 Tandem +# 9 untested +>1 ubyte 5 Atari ST +>1 ubyte 8 Z-System +>1 ubyte 9 CP/M +>1 ubyte 10 Windows NTFS +>1 ubyte 12 VSE +>1 ubyte 14 VFAT +>1 ubyte 15 alternate MVS +>1 ubyte 18 OS/400 +>1 ubyte 19 OS X +# unused +#>1 ubyte >19 unused %#x + +# Zip End Of Central Directory record +# GRR: wrong for ZIP with comment archive +-22 string PK\005\006 +#>4 uleshort !0xFFff \b, %u disks +#>6 uleshort !0xFFff \b, central directory disk %u +#>8 uleshort !0xFFff \b, %u central directories on this disk +#>10 uleshort !0xFFff \b, %u central directories +#>12 ulelong !0xFFffFFff \b, %u central directory bytes +# offset of central directory +#>16 ulelong x \b, central directory offset %#x +>(16.l) use zipcd +# archive comment length n +#>>20 uleshort >0 \b, comment length %u +# archive comment +>>20 pstring/l >0 \b, %s |