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Date: Wed, 21 Nov 2012 20:03:04 +0100
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: How does incremental mode works?
On 21 Nov, 2012, at 18:01 , Matt Weir <cweir@...edu> wrote:
>> Do you have any reference or example of these policy filter or equivalent
>> solutions being used to generate such kind of specific candidate passwords
>> for jTr running with incremental mode?
>
> So in the official EXAMPLES readme for JTR, (found in the doc
> directory of your install or online at
> http://www.openwall.com/john/doc/EXAMPLES.shtml), give an example on
> how to apply policy rules to incremental mode.
>
> -Begin Quote--
> You can use some pre-defined or custom word filters when generating
> the charset file to have John consider some simpler passwords only:
> john --make-charset=my_alpha.chr --external=filter_alpha mypasswd
> -End Quote---
>
> Now that is for trying only simple passwords, but you could use an
> external mode to only build charsets based on more complicated
> passwords as well, (aka must be at least 8 chars, contain an uppercase
> character + digit).
Included in Jumbo (and core too I think), there is also an --external=policy mode that is defined in john.conf and that you can modify to suit your needs. This does exactly what you ask for.
magnum
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