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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