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Message-ID: <56F6CE3F.1080004@openwall.net>
Date: Sat, 26 Mar 2016 13:00:31 -0500
From: jfoug <jfoug@...nwall.net>
To: john-users@...ts.openwall.com
Subject: Re: External Policy Filter
Why not some rules:
[List.Rules:PolicyFilter]
# handle all permutations with all 5 ?l?u?d?s?b
>7/?l/?u/?d :
>7/?l/?u/?s :
>7/?l/?u/?b :
>7/?l/?d/?s :
>7/?l/?d/?b :
>7/?l/?s/?b :
# handle all permutations with 4 ?u?d?s?b
>7/?u/?d/?s :
>7/?u/?d/?b :
>7/?u/?s/?b :
# handle ?d?s?b
>7/?d/?s/?b :
# I 'think' that is it, but I am doing this off the cuff, so I may have
missed some.
Then simply run:
./john -w=rocku.txt -rules=PolicyFilter -stdout | unique
rockyou-policy-filter.dic
$ wc rockyou.txt
14344391 14442062 139921497 rockyou.txt
$ ../john -w=rockyou.txt -rules=PolicyFilter -stdout | ../unique
rockyou-policy.dic
Press 'q' or Ctrl-C to abort, almost any other key for status
747744p 0:00:00:11 100.00% (2016-03-26 12:53) 63909p/s 957£}~w0¬z?>4ko
Total lines read 747744 Unique lines written 645347
So it completed in under 15s and built a file that was 22x smaller than
rockyou.txt
but contains only data that would likely pass the policy rules (note I
say likely because
it will depend upon code pages, etc, and the ?b does not map directly to
unicode).
This would not be a great method for a fast hash, but then if whoever
wrote the login code
was dumb enough to use a fast hash, then they certainly would not have
been smart enough
to use a policy like this, lol.
On 3/25/2016 8:02 PM, Rich Rumble wrote:
> I've been on many threads and re-read everything I can, but I can't
> figure out how to change [List.External:Policy] to be closer to how
> Microsoft has implemented their default complexity policy for
> passwords.
> https://technet.microsoft.com/en-us/library/cc786468%28v=ws.10%29.aspx
> I'm only interested in making that policy do more dynamic matching...
> meaning instead of filtering on static character classes (?u?l?d,
> ?u?l?s, ?u?s?d etc...) have do more if not at least 3 of these
> combinations of classes, then reject.
> So allow: ( >7 )
> Asdf12#$ (?u?l?d?s)
> Asdf1234 (?u?d?l)
> ABCD3fgh (?u?d?l)
> asdf@$$1 (?l?s?d)
> A@...5%% (u?l?d?s)
>
> Maybe a perl or regex script is better suited for the task, especially
> since I can't seem to get the length to go beyond 8 in my version of
> jtr.
> ./john.exe -w=rockyou.txt -external=policy -stdout
> The regex's I've come across haven't been working to my satisfaction.
> -rich
--
Community volunteer for John the Ripper project.
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