Date: Sun, 27 Jun 2021 00:29:51 -0700 From: David Sontheimer <david.sontheimer@...il.com> To: john-users@...ts.openwall.com Subject: Cracking passphrases 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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