john-users - Re: how to print our the number of guesses john the ripper makes to crack a password

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Message-ID: <4E95E984.1000506@hushmail.com>
Date: Wed, 12 Oct 2011 21:24:52 +0200
From: magnum <john.magnum@...hmail.com>
To: john-users@...ts.openwall.com
Subject: Re: how to print our the number of guesses john the
 ripper makes to crack a password

On 2011-10-11 19:23, SH wrote:
> Is there anyway I can print out the number of guesses john the ripper makes?
> what I really need is a curve on the number of guesses that has been made
> vs. the number of cracked passwords from time to time.
> I am using version 1.7.5-jumbo-2.

I just implemented this and posted to the wiki at
http://openwall.info/wiki/john/patches (patch 0027). You may like the
0012 patch too. Both are somewhat experimental - I'm not sure they will
stay as they are in next Jumbo.

Sample output:

$ rm -f deleteme && ./john -pot:deleteme -inc:alnum
~/src/john/john/test/NT_tst.in -fo:nt -crack-status
Loaded 1500 password hashes with no different salts (NT MD4 [128/128 X2
SSE2-16])
1                (u8-NT)
guesses: 1/2352000  time: 0:00:00:00 0.00%  c/s: 26133K  trying: 0101535
- 0103682
start1           (u54-NT)
guesses: 2/9835008  time: 0:00:00:00 0.00%  c/s: 75653K  trying: marier
- mang96
test             (u10-NT)
guesses: 3/26133248  time: 0:00:00:00 0.00%  c/s: 145184K  trying: tech
- ting
summer           (u37-NT)
guesses: 4/36863744  time: 0:00:00:00 0.00%  c/s: 194019K  trying:
summit - sumpoo
johnny           (u39-NT)
guesses: 5/91389952  time: 0:00:00:00 0.00%  c/s: 365559K  trying:
john75 - joha99
12345            (u28-NT)

Note 1: Applying only patches 0012 and 0027 to a 1.7.8-jumbo-7 tarball
should work fine, ignore the warnings when patching.

Note 2: The figure is not words tried, but word/hash combinations tried.
So in the output above, it actually made the first correct guess
somewhere around 2352000/1500 = candidate number 1568. This can be a bit
confusing.

magnum

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