Re: lib/48014: libarchive zip reading fails on all xps files created by windows 7

[Thomas Klausner <wiz%NetBSD.org@localhost>]

The following reply was made to PR lib/48014; it has been noted by GNATS.

From: Thomas Klausner <wiz%NetBSD.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: lib/48014: libarchive zip reading fails on all xps files created
 by windows 7
Date: Thu, 4 Jul 2013 21:45:23 +0200

 On Thu, Jul 04, 2013 at 04:45:00PM +0000, martin%NetBSD.org@localhost wrote:
 > [/tmp/pdf] martin@whoever-brings-the-night > /usr/pkg/bin/unzip -t gaga.xps 
 > Archive:  gaga.xps
 >     testing: Metadata/Job_PT.xml      OK
 >     testing: Metadata/MXDC_Empty_PT.xml   OK
 >     testing: Documents/1/Metadata/Page1_Thumbnail.JPG   OK
 
 I think the problem is caused by the combination of a stored (vs.
 deflated) file with general purpose bit 3 set, i.e. the actual crc,
 compressed and uncompressed size following after the data.
 
 I don't understand how the code is supposed to work well enough, but
 it might be that if zip->entry_compressed_bytes_read isn't updated
 correctly when reading uncompressed data -- at least I saw '0' once.
  Thomas