Date: Sat, 31 Dec 2011 18:48:10 +0100 From: Jean-Michel PICOD <jm@...izoku.org> To: john-users@...ts.openwall.com Subject: Re: John as a wordlist creator In fact, it is so easy to implement the feature you are looking for that it is already in john ! $ ./john -w:wordlist --rules --stdout > wordlist2.txt And even better with -jumbo versions, you could use multiple rulesets: $ ./john -w:wordlist --rules=rules1 --stdout > wordlist2.txt $ ./john -w:wordlist --rules=rules2 --stdout >> wordlist2.txt etc. Jean-Michel 2011/12/31 Alex Sicamiotis <alekshs@...mail.com> > > I downloaded some extra rules that I merged in john.conf, and while they > increased the cracking efficiency, > > a) they were very time consuming (it's to be expected) > b) they had significant overlap due to mangled worlds appearing the same > > for example > > guesses: 2 time: 0:00:21:43 7% c/s: 7991K trying: Alex2194 - Alekshs2 > guesses: 2 time: 0:00:22:48 7% c/s: 8006K trying: Giannis2 - Giannhs2 > guesses: 2 time: 0:00:23:17 7% c/s: 8008K trying: Alex2521 - Alekshs2 > > Alekshs2 appeared a few hundred times, and that means it has been tried a > few million times :P > > So that wastes CPU time in DES-cracking... and I was thinking, what if I > JtR could be run with something like > > ./john -w:wordlist.txt -rules -create_wordlist:wordlist2.txt > > in which, "-create_wordlist" would essentially be a new wordlist, > consisting of the given worldlist + rules. > > Then a sort/uniq is in order to eliminate duplicates. Ideally this could > be done by JtR. > > Theoretically, such a feature shouldn't be hard to implement and I can > imagine a few cases where it might be useful: > > A) Too many rules / too many duplicate words from mangling efforts > B) Creating a wordlist so that it can feed a GPU (from what I've read, the > GPU is best at processing, rather than generating words) > C) For slow hashes like Blowfish, the sharing of workload could be easier > by assigning parts of the wordlist to, say, 100 people. This would require > something like > > 1) ./john -w:wordlist.txt -rules -create_wordlist:wordlist2.txt > 2) sort + uniq on wordlist2.txt > 3) a wordlist division tool that will divide the end wordlist to N members > (or N threads on a cluster?)
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