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Date: Sat, 5 Jan 2013 18:07:13 -0500
From: Rich Rumble <richrumble@...il.com>
To: john-users@...ts.openwall.com
Subject: Reject words based on length without modifying rules/wordlists
Say I have -w=rockyou.txt and I don't want to edit all of the "Jumbo"
rules to reject words if less than 8. Would it be best to create a
filter() that possibly rejects words that are 7 or less characters? Or
should I create a new wordlist that only contains passwords of a
certain length or more? I also realize that a rule may be appending or
prefixing characters to words so I may want to decrease to 6 or more,
but for now I'm generalizing at 8 in wordlist mode. I'd rather not
edit every rule, and I'd rather not have all of these copies of my
wordlists broken down by lengths. I'm sure I could use
awk/sed/perl/etc... to stdin/pipe as well, but most windows users
don't have those at the ready. I'm curious about an efficient solution
to knowing you won't encounter passwords of less than X length. I
didn't find much in the archives about it, so please let me know if
I've missed something previously addressing such a question. I looked
at "[List.External:Filter_LanMan]" but it's the opposite I want as far
as the length part goes... and the filter_policy modes I didn't see
length as an item they were checking for, but I have no idea what I'm
doing so they very well could check for a certain length :)
Thanks!
-rich
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