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Date: Sat, 10 Nov 2012 04:23:27 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Split kernel for OpenCL WPA-PSK

magnum -

On Fri, Nov 09, 2012 at 08:00:50PM +0100, magnum wrote:
> how about upgrading Bull to the driver versions recommended by HashCat?
> It's Catalyst 12.8 and nvidia 304.32.

I was/am going to install whatever is latest, but not right now as I
have no time to deal with possible side-effects or perform a downgrade
in the following couple of weeks.  So let's revisit this in 2+ weeks
from now.

> Using device 0: Tahiti
> Local worksize (LWS) 128, Global worksize (GWS) 262144
> Benchmarking: WPA-PSK PBKDF2-HMAC-SHA-1 [OpenCL]... DONE
> Raw:    129453 c/s real, 52428K c/s virtual

Great!

> This is a tad faster than HashCat unless Atom has tweaked it since the 
> figure I found (otherwise he will now... OTOH I'm not done yet =). 

The hashcat website says 131k c/s, and it did for a while (not a recent
change).  Milen mentioned getting 137k with hashkill in a tweet a while
ago.  All of these are for HD 7970 at stock clocks.

> Jumbo-7 does 42723 c/s out of the box.

IIRC, it did 55k when built with OpenMP.  Still relatively slow, of course.

> If I only could figure out how to compile clcc on Bull. I have no chance 
> to look at the referenced Ptx assembly. Or is there a way to keep temp 
> files?

I hope someone else will answer this better, but we can try chattr +a on
a directory (needs root privs) or LD_PRELOAD'ing a library with dummy
unlink() (can be done as non-root) if nothing else helps.

Alexander

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