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- Newsgroups: comp.compression
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!ira.uka.de!Sirius.dfn.de!news.DKRZ-Hamburg.DE!rzsun2.informatik.uni-hamburg.de!fbihh!bontchev
- From: bontchev@fbihh.informatik.uni-hamburg.de (Vesselin Bontchev)
- Subject: Re: pkzip 2.04c / unzip v5.0 compatibility
- Message-ID: <bontchev.726784989@fbihh>
- Keywords: passwords problem.
- Sender: news@informatik.uni-hamburg.de (Mr. News)
- Reply-To: bontchev@fbihh.informatik.uni-hamburg.de
- Organization: Virus Test Center, University of Hamburg
- References: <1iierpINNk9f@gap.caltech.edu> <1993Jan8.130724.21237@julian.uwo.ca> <1993Jan8.224724.23801@leland.Stanford.EDU> <1il56hINN9lq@gap.caltech.edu>
- Date: 11 Jan 93 20:43:09 GMT
- Lines: 28
-
- madler@cco.caltech.edu (Mark Adler) writes:
-
- > Actually, there was a bug in Unzip 5.0's decryption that is fixed in
- > our current beta version. That beta version appears to have no problem
- > decrypting stuff from PKZIP 2.04c. However, we check for the high
- > byte of the crc as the 12th byte of the encryption header--not a zero.
-
- I also have encountered this bug in Unzip 5.0 and have downloaded the
- beta version. I was unable to reproduce the problem reported by the
- original poster - that is, all files encrypted with PKZIP 2.04c unpack
- without problems with unzip.
-
- One could argue that this is because I am using a fixed Unzip. Not so.
- The original poster told my by private e-mail that zipcloak is also
- unable to remove the encryption of the PKZIP 2.04c encrypted files. As
- far as I understand, the bug was present in Unizip, but NOT in
- zipcloak...
-
- Nevertheless, I was unable to reproduce the problem - even with
- zipcloak...
-
- Regards,
- vesselin
- --
- Vesselin Vladimirov Bontchev Virus Test Center, University of Hamburg
- Tel.:+49-40-54715-224, Fax: +49-40-54715-226 Fachbereich Informatik - AGN
- < PGP 2.1 public key available on request. > Vogt-Koelln-Strasse 30, rm. 107 C
- e-mail: bontchev@fbihh.informatik.uni-hamburg.de D-2000 Hamburg 54, Germany
-