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Date: Fri, 19 Aug 2011 12:17:27 -0500
From: "jfoug" <>
To: <>
Subject: RE: pkzip format released.

I am working on this a little. Performance gains etc.


However, I AM changing the hash line format.  I am adding the compression
type for the ascii data, and for the full blob data.  This is needed to know
if it is type 8 (deflated), or type 0 stored.  It makes a huge difference if
I try to inflate a stored blob, lol.  


I have also added ability to build with a 'zip-debug' flag set.  In
debugging mode, if valid sees a $pkzip1$ signature (the new formats
signature), but valid is not met, a message will display to stderr, telling
what 'part' of the validation failed.  This hopefully should not be an
issue, now that I have zip2john working (well, I will have to add in the new
fields).  Before, when I was hand making the hashes, it was a pain if they
did not load.


The current version does work, but hashes created right now, will have to be
re-done (so do not spend too much time building a library right now).   The
changes should be uploaded in a few hours, I hope.




From: jfoug


It is up on the wiki (I also did another trivial patch).  


The pkzip format handles properly legacy encrypted files.  Also modified
zip2john process to build the hash.


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