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Message-ID: <9132860f259d68d4da63a206aa01f7e6@smtp.hushmail.com>
Date: Fri, 22 Nov 2013 22:00:09 +0100
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: Questions and suggestions to build a home cracking
box. :)
On 2013-11-22 18:24, Richard Miles wrote:
> I know mask mode very briefly, to say the true I know it exist because of
> hashcat, but I don't understand it very well. I found this post and I guess
> it's related:
>
> http://www.openwall.com/lists/john-dev/2013/06/15/1
Come on man, try harder. It's not that hard. Quoting that mail:
> $ ./john --mask='?u?l[ab]?d??' --stdout | head -3
> Press 'q' or Ctrl-C to abort, almost any other key for status
> Aaa0?
> Aaa1?
> Aaa2?
The mask, separated by position, is ?u ?l [ab] ?d ??
First position is ?u == upper-case A-Z
Second position is ?l == lower-case a-z
Third position is [ab] == 'a' or 'b' (not supported by HC afaik)
Fourth position is ?d == digit 0-9
Fifth position is actually a static '?' but since the mask tokens begin
with a question mark, a literal one is escaped as '??'.
So how many candidates will this generate?
26 * 26 * 2 * 10 * 1
That's 13520 candidates. Not a lot: It will keep a GPU happy for just
about one millisecond.
> Where can I find a good documentation explaining how mask mode works,
> advances in comparison with other modes, etc?
I urge you to get familiar with this from a user perspective and then
write that documentation, on our wiki. Yes, you too can contribute!
http://openwall.info/wiki/john
Seriously, just create an account and go ahead.
magnum
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