Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 19 Jan 2006 00:12:46 +0000 (UTC)
From:  Radim Horak <>
Subject:  Re: Custom .chr files w/o .pot

Mark Shaw <mnshaw@...> writes:

> Hello,
> Is it possible to create a custom .chr file without first having any
> cracked passwords?

You can define incremental mode with custom chars in john.ini (see doc/EXAMPLES) 
with the help of "Extra=" and "CharCount=" commands. It would be then enough to 
write one or more possible password candidates in the john.pot like this
and then generate the .chr file and define it's custom mode in ini.

> 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.

If you have good knowledge about at least half of the password and if it's not 
too long/complex (under 10 characters), then I would recommend to write all the 
possible biggest parts of the password to the wordlist and generate the 
uncertain characters with wordlist rules (see doc/RULES). In this way you have 
greater control on the generation of the password candidates and you can better 
exploit the knowledge about the positions of the characters in the password.


Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.