Date: Thu, 19 Jan 2006 00:12:46 +0000 (UTC) From: Radim Horak <yesbody@...nam.cz> To: john-users@...ts.openwall.com 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 :my_password 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. -Radim
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