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Message-Id: <100521347-0f31ad968041f9bda19aa101d7f45356@pmq4v.m5r2.onet>
Date: Thu, 23 Jul 2015 15:08:37 +0200
From: rysic <rysic@...pl>
To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com>
Subject: Re: Re: Re: Re: restore difficult zip password
You are rught!
If I use whole directory, then it is working!!! :-)
Thank you!
W dniu 2015-07-22 00:47:04 użytkownik magnum <john.magnum@...hmail.com> napisał:
> On 2015-07-22 00:25, Marek Wrzosek wrote:
> > JtR needs zip file to crack the password, either it's stored inside file
> > produced by zip2john command (if it's small enough) or as separate file
> > (the john needs zip file and the product of zip2john). They need your
> > archive (that one with 'asd' password) to check where is the problem or
> > they would need to get the exact same version of zip as is in OpenSUSE
> > 13.2. Does 'bleeding-jumbo' have problems cracking that zip file with
> > 'asd' password?
>
> I already realized he was using the john-1.8.0-jumbo-1 tarball, as can
> be downloaded from Openwall. For some reason he had it named .gz despite
> you could tell from deflate figure (of 45%) it was already gunzipped.
> When I tried to reproduce, I also gunzipped it but used a correct
> filename without gz extendion.
>
> And right now, I realized THAT is the problem! Since his file was called
> .gz even though it wasn't gzipped, his pkzip format was fooled into
> looking for a known plaintext (a gz file magic) that wasn't there -
> voila, false negative.
>
> @JimF, I think we should ditch all use of file magic (or make non
> default) now that we have the excellent Huffman checks.
>
> magnum
>
>
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