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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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