Date: Sat, 31 Mar 2012 19:41:35 +0100 From: Michael Pappas <pappasm@...man.ac.uk> To: john-dev@...ts.openwall.com Subject: GPU acceleration - what to implement? Hi folks, Back from easter holidays, and I was wondering on how to start up with contributing to GPU accelerated hashes. Given that I am currently learning OpenCL (no prior experience), I think that a possible path would be the following: 1. Keep working on OpenCL 2. Study the source code of one of the already implemented hashes 3. Implement a hash that John does not support yet 4. Improve performance of my implementation / other implementations as I gain further experience with OpenCL / GPGPU optimisation techniques I am currently looking at opencl_rawsha1_fmt.c. I have found some documentation on format.h but any additional information would be greatly appreciated. I'll probably get back to you with more specific questions though. Regarding on which protocol to implement, do you have any particular recommendations? I've noticed that John does not support WPA/WPA2, but I'm not sure whether they fit into the GPU aspect. Any other recommendations regarding this or any alternative attack plan are always welcome :) Best regards, Michael
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