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Message-ID: <CALDUj-vGsoHHcmHDEQg-xh0TNMgr9L59r1YwhoJkUuxd14WYLg@mail.gmail.com>
Date: Tue, 10 Jan 2012 12:25:33 -0500
From: Chuck Kahn <chuck.kahn@...t-in-toronto.on.ca>
To: john-users@...ts.openwall.com
Subject: Re: official JtR or jumbo for RAR?
After running john (setting MaxLen and MinLen to 2 to keep the test short)
on the rardump file
/usr/local/Cellar/john/john-1.7.9-jumbo-5/run/john --format=rar
> --incremental:Digits2 rardump
comes the repeated message:
RAR -p mode support is not complete yet!
> RAR -p mode support is not complete yet!
> RAR -p mode support is not complete yet!
>
Followed by the result:
> guesses: 0 time: 0:00:00:02 DONE (Tue Jan 10 12:15:30 2012) c/s: 40.81
> trying: 87
It doesn't look like it matched the password "11". If "RAR -p mode
support" refers to incomplete support of the "p" (password) switch of the
RAR command, does that mean jumbo can't crack RAR passwords?
On Tue, Jan 10, 2012 at 3:37 AM, Dhiru Kholia <dhiru.kholia@...il.com>wrote:
> On Tue, Jan 10, 2012 at 11:36 AM, Chuck Kahn
> <chuck.kahn@...t-in-toronto.on.ca> wrote:
> > Which will work faster at cracking RAR passwords -- the official JtR or
> > jumbo?
>
> Official JtR doesn't have support for cracking RAR files in-built.
>
> > $ /usr/local/Cellar/john/john-1.7.9-jumbo-5/run/john --format=rar
> >> --incremental:all testabc.rar
> >> No password hashes loaded (see FAQ)
> > The FAQ doesn't provide detail on how to use "--format=rar" for jumbo
> JtR.
> > How do I proceed with jumbo and RAR?
>
> If you are using jumbo then first run rar2john tool on your RAR files
> rar2john testabc.rar > rardump
>
> Then run john on the generated rardump file.
>
> john --format=rar rardump
>
> Using jumbo should be faster than your shell script. However cracking
> RAR files is extremely slow in general.
>
> --
> Cheers,
> Dhiru
>
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