Package: libzipios++0v5
Version: 0.1.5.9+cvs.2007.04.28-11build1
Severity: normal
Tags: patch
X-Debbugs-Cc: werner.wm.ma...@gmx.de
Dear Maintainer,
when using the class ZipFile to open a zip file and calling getInputStream() to
access a certain file within the zip archive
then trying to read in the content returns garbage.
The problem occurs because inside the constructor of ZipInputStreambuf there is
already a call of getNextEntry() but inside
ZipFile::getInputStream() there is a second call of getNextEntry().
The problem was caused by upstream back in 2007. For some reason the call of
getNextEntry() was removed from ZipInputStreambuf.
In a second change the getNextEntry() was added to ZipFile::getInputStream().
Debian fetched this upstream version on Sat, 28 Apr 2007 02:11:43 +0900.
Obviously this version caused a problem to the enigma package (#421498) and as
a fix the call of getNextEntry() was readded to
ZipInputStreambuf but was not removed any more from ZipFile::getInputStream()
and is still present in the current version.
Affected by this bug is the recently released FreeCAD 1.0 that fails to extract
a PNG thumbnail from a FCStd file.
Note: The latest FreeCAD version in Debian testing or unstable is 0.21 and this
version is not affected by this bug.
As a fix for the problem all what needs to be done is to remove
'zis->getNextEntry();' from ZipFile::getInputStream.
Best Regards,
Werner Mayer
--- zipios++-0.1.5.9+cvs.2007.04.28.orig/src/zipfile.cpp
+++ zipios++-0.1.5.9+cvs.2007.04.28/src/zipfile.cpp
@@ -71,7 +71,6 @@ istream *ZipFile::getInputStream( const
ZipInputStream *zis( new ZipInputStream( _filename,
static_cast< const ZipCDirEntry * >( ent.get() )->
getLocalHeaderOffset() + _vs.startOffset() ) ) ;
- zis->getNextEntry();
return zis;
}
}
P.S. For more details have a look at
https://github.com/FreeCAD/FreeCAD/issues/13676
-- System Information:
Debian Release: bookworm/sid
APT prefers jammy-updates
APT policy: (500, 'jammy-updates'), (500, 'jammy-security'), (500, 'jammy'),
(100, 'jammy-backports')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.15.0-126-generic (SMP w/4 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE,
TAINT_UNSIGNED_MODULE
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages libzipios++0v5 depends on:
ii libc6 2.35-0ubuntu3.8
ii libgcc-s1 12.3.0-1ubuntu1~22.04
ii libstdc++6 12.3.0-1ubuntu1~22.04
ii zlib1g 1:1.2.11.dfsg-2ubuntu9.2
libzipios++0v5 recommends no packages.
libzipios++0v5 suggests no packages.
-- no debconf information
