Date: Fri, 14 Jan 2011 12:25:08 +0100 From: Samuele Giovanni Tonon <samu@...uxasylum.net> To: john-users@...ts.openwall.com Subject: Re: opencl sha1 jtr and others some experiments and some suggestion hello, i'm happy to send you a patch for raw-sha1-opencl alpha release you need to put this patch on top of a vanilla john-1.7.6 + jumbo-9 + opencl-9 patches. Many things have changed since the first ugly code i posted: - added sha1 cl code from pyrit which is 5% faster. - moved little endian -> big endian final conversion to cl kernel adding some 5% speed. - started using SSHA_NUM_KEYS > 1 which is the way to send big chunks of password to GPU (n.b. if you want to play with that value you need to keep SSHA_NUM_KEYS aligned between the .c and the .cl file ) Known Bugs: - Putting more than 1024*8 num_keys almost hang my pc and hang the program too, this issue need to be searched in depth - Little Endian to Big Endian cl code cause Nvidia to fail at program build with: compilation log: Error: Code selection failed to select: 0x2691c60: i32 = bswap 0x2691260 looks like i did something bad. What is needed: fix bugs - test if by putting the routine "padding + 0x80 + size" on the cl adds speed or not - tune it and optimize - add some useful comments in the code Benchmark: while the test benchmark keeps making me laugh: $../run/john --format=raw-sha1-opencl -test Benchmarking: Raw SHA-1 OpenCL [SHA-1]... OpenCL Platform: <<<ATI Stream>>> and device: <<<Juniper>>> DONE Many salts: 1351 c/s real, 1340 c/s virtual Only one salt: 1419 c/s real, 1402 c/s virtual it does starting to shine a bit on the "real world": (mieihash it's just a file with unsalted sha1 i did for test) $../run/john --format=raw-sha1-opencl ~/mieihashh OpenCL Platform: <<<ATI Stream>>> and device: <<<Juniper>>> Loaded 129988 password hashes with no different salts (Raw SHA-1 OpenCL [SHA-1]) guesses: 3888 time: 0:00:01:39 90.01% (2) (ETA: Fri Jan 14 12:04:29 2011) c/s: 157073K trying: 6coyote - champsed guesses: 9017 time: 0:00:10:32 (3) c/s: 168060K trying: bioblet - 0258172 However these tests still don't compare with the normal raw-sha1: $../run/john --format=raw-sha1 ~/mieihashh guesses: 17346 time: 0:00:00:44 (3) c/s: 36041M trying: sto1020 guesses: 21171 time: 0:00:02:29 (3) c/s: 30529M trying: boofbass guesses: 21209 time: 0:00:02:33 (3) c/s: 30341M trying: 33787670 in my previous email i got 1359M c/s: this was because of a missing for inside crypt_all; sorry for spreading false numbers i was too excited :-D If you have some free time and want to spend it around this code it's appreciated. i must say thanks to all for the good adivice received so far, i'll keep working on the code to make it faster. Regards Samuele Download attachment "john-1.7.6-jumbo-9-opencl-sha1-1.diff.gz" of type "application/x-gzip" (4891 bytes)
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