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Date: Wed, 18 Jan 2006 22:09:47 +0100
From: Simon Marechal <>
Subject: Re: Custom .chr files w/o .pot

Mark Shaw wrote:
> Hello,
> Is it possible to create a custom .chr file without first having any
> cracked passwords?
> For a rather involved reason, I'm trying to crack my own password.
> I know the length, and some characters that are defnitely present,
> and some that are definitely not.  I'd like to exploit this knowledge
> to run an incremental crack using a reduced character set.
> Alternately, can I just use all.chr and somehow tell john not to
> use certain characters?  Would this have any real effect on run
> time?

To build custom .chr files without a good pot file, you just have to 
build it:

cat wordlist | sed -e 's/^/xxx:/' > john.pot

Have fun!

Download attachment "smime.p7s" of type "application/x-pkcs7-signature" (2525 bytes)

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