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- From: madler@cco.caltech.edu (Mark Adler)
- Newsgroups: comp.compression
- Subject: Re: pkzip 2.04c / unzip v5.0 compatibility
- Date: 9 Jan 1993 00:10:56 GMT
- Organization: California Institute of Technology, Pasadena
- Lines: 21
- Message-ID: <1il56hINN9lq@gap.caltech.edu>
- References: <1iierpINNk9f@gap.caltech.edu> <1993Jan8.130724.21237@julian.uwo.ca> <1993Jan8.224724.23801@leland.Stanford.EDU>
- NNTP-Posting-Host: sandman.caltech.edu
- Keywords: passwords problem.
-
-
- Paul Kocher thinks:
-
- >> instead of having two bytes of the crc32 at the end of the encryption
- >> header, the final byte of this header is a zero. (The others are
-
- 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.
-
- Can you recheck your assertion that the 12th byte is a zero? I don't
- see how this can agree with our test results.
-
- In any case, a new patched unzip will be released next week which
- includes the patches I posted to decompress stuff from pkzip 2.04c,
- as well as the decryption fix that's been there a while, and some
- other fixes.
-
- Mark Adler
- madler@cco.caltech.edu
-