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Date: Sun, 8 May 2016 11:13:22 +0200
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: Using --show with older pot files

On 2016-05-08 03:20, Matt Weir wrote:
> I have a number of old pot files. When using them in a new cracking session
> they work great and john doesn't try to re-crack old passwords. I encounter
> problems though when I use the -show option to see how many passwords are
> cracked. Note, this is using bleeding john.
>
> '--show=left' works as expected with old pot files. Old hashes are matched
> as having cracked passwords in the list
>
> '--show' only shows passwords cracked with newer cracking sessions, not
> ones cracked under the older style pot files.
>
> For example, assume the following pot file, (hashes x'd out)
>
> XXXXXXXXXXXXXXXXXXXXXXX:password1
>
> $dynamic_0$XXXXXXXXXXXXXXXXXXXXX:password2
>
> If I run ./john -show target_list
>
> 2:password2
>
> 1 password hashes cracked, 1 left
>
> Even though password1 is in my cracked list and target list. Aka if it
> doesn't have the $hashtype$ in front it doesn't work with the --show option.

Are you seeing this with formats other than dynamic? We probably have 
several formats with this problem but anyway it's a per-format issue 
(and many formats, especially non-hashes, are not supposed to recognize 
bare hashes anyway). It's usually a result of using prepare() for things 
that should be put in split():

https://github.com/magnumripper/JohnTheRipper/wiki/split()-vs.-prepare()

We should basically only use prepare() for its initial reason to exist, 
namely for reading other input fields than the ciphertext. Good examples 
are for reading pwdump or l0pthcrack formats.

magnum

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