Date: Fri, 8 Feb 2013 21:36:50 +0100 From: magnum <john.magnum@...hmail.com> To: john-users@...ts.openwall.com Subject: Re: Cracking SHA1 with some knowledge of password You could use an external filter but it will have crappy performance for a fast raw hash like this. Unfortunately you can't use rules with Incremental mode. I have considered trying to enable that. Should be trivial. Jim's idea is your best bet. magnum On 8 Feb, 2013, at 21:01 , Lex Par <ziptied@...il.com> wrote: > Thanks! Is there a way to do this without using a word list (brute force > it)? > > Thanks. > > On Fri, Feb 8, 2013 at 2:16 PM, magnum <john.magnum@...hmail.com> wrote: > >> On 8 Feb, 2013, at 17:40 , Lex Par <ziptied@...il.com> wrote: >> >>> Group, I have a SHA1 hash that I would like to brute-force. I have >>> knowledge of several characters before and after the password (ie, if the >>> hash is derived from "xxxpasswordyyy", I know both xxx and yyy). I'd >> like >>> to somehow input the xxx and yyy values as constants, so that they are >>> always included in the crack attempt but the "password" portion is >>> brute-forced. >> >> This can be done in several ways but using rules should be fastest. Add >> this to your john.local.conf: >> >> [List.Rules:custom] >> A0"xxx"Az"yyy" >> >> >> Then run wordlist mode with --rules:custom. >> >> magnum >>
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