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Message-ID: <CAF5WNqmrTEynk39D+OS_GTZ7gbctwjtnUp5=q7YPVfKNe60zTw@mail.gmail.com> Date: Sun, 27 Jun 2021 15:56:20 -0700 From: David Sontheimer <david.sontheimer@...il.com> To: john-users@...ts.openwall.com Subject: Re: Cracking passphrases Clarifying - this is not limited to Alexander/Solar. I'm open to suggestions from all, for both cracking passphrases and my related post on cracking nested hashes with unknown salts. -David On Sun, Jun 27, 2021 at 12:29 AM David Sontheimer < david.sontheimer@...il.com> wrote: > Hello Alexander, > > I am curious how you would use John to crack the following password > generation heuristic: > > A passphrase, limited to combinations of words from a wordlist of > four-letter words. A passphrase may contain one to four words. > > Optionally, each line of the wordlist contains one word, and the wordlist > is limited to 1000 English words. > > I've searched the documentation and previous posts to the listserv but > found nothing so far. > > john.conf mentions the following, but I don't believe it's quite what I'm > after: > > # These are for phrase wordlists w/ spaces > 1203 [List.Rules:passphrase-rule1] > 1204 .include <rules/passphrase-rule1.rule> > 1205 > 1206 [List.Rules:passphrase-rule2] > 1207 .include <rules/passphrase-rule2.rule> > > I'm comfortable writing an external script for generating these candidates > and using John's --stdin option, but I'm curious if John can generate these > hashword candidates internally with a wordlist and appropriate rules. If > so, while all candidates would be generated either way, I'm curious if > cracking via internal generation will be more efficient. > > If using stdin, I'm curious if I need to somehow batch the candidate > generation to parallelize the work efficiently. For example, all four-word > passphrases from a wordlist of 1000 entries is one trillion total > candidates. > > Regards, > -David > >
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