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Date: Tue, 3 Apr 2012 23:52:40 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: MSCash2 CUDA
Lukas -
On Tue, Apr 03, 2012 at 11:34:37PM +0400, Solar Designer wrote:
> And THREADS 512 is even faster:
>
> Benchmarking: mscash2-cuda [GPU]... DONE
> Raw: 29619 c/s real, 29619 c/s virtual
However, it failed to crack a test password. I put this in a file:
$DCC2$10240#Joe#e09b38f84ab0be586b730baf61781e30
It corresponds to qerwt per tests[]. Then I ran:
./john pw -fo=mscash2-cuda -i=alpha
with john.conf edited to use MinLen and MaxLen 5. This completed
without getting the password cracked:
guesses: 0 time: 0:00:06:53 DONE (Tue Apr 3 23:44:49 2012) c/s: 28730 trying: qcyqy - qvxqv
Then I tried:
$ echo qerwt | ./john pw -fo=mscash2-cuda -stdin
Loaded 1 password hash (mscash2-cuda [GPU])
guesses: 0 time: 0:00:00:06 c/s: 0.16 trying: qerwt
All of this was with THREADS 512. I also noticed that when I increase
THREADS further to 768, I get ridiculously high performance per
benchmarks (over 1M c/s), yet the self-tests somehow "pass". Perhaps we
need to improve the self-testing...
Finally, just to confirm the test vector:
$ echo qerwt | ./john pw -fo=mscash2 -stdin
Loaded 1 password hash (M$ Cache Hash 2 (DCC2) [SSE2i 8x])
qerwt (?)
guesses: 1 time: 0:00:00:00 c/s: 2.85 trying: qerwt
Alexander
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