Date: Wed, 8 Jul 2009 14:21:56 -0600 From: RB <aoz.syn@...il.com> To: john-users@...ts.openwall.com Subject: Re: Johns future - Question about OpenCL-interest and khc On Mon, Jul 6, 2009 at 10:14, rembrandt<rembrandt@...erlin.de> wrote: > I would just genericaly ask if there is any interest to may add OpenCL > implemented algorithms to john. I think you'll find a lot of silent interest. People tend to subscribe to this list, but given the subject matter are rather quiet about what they do or what they'd like to see implemented. Your best indicator of popularity may well be stats on how often your patch is downloaded. > OpenCL might even be interesting for salted algorithms. > John itself would need some additional modifications still I think > (threading). The general topic of acceleration is, of course, an oft-repeated theme on this list. Solutions range from parallelization (current MPI and distribution efforts) to hardware-accelerated offload, most often centering around either GPU offload  or FPGA offload . For what are most likely time reasons, Solar hasn't yet elected to publish an officially-supported parallelization or offload scheme. Various approaches have come and gone, but none have been officially supported or adopted. There is one  indication of what might be considered a righteous parallelization approach, but AFAIK there are no public implementations. Do note that elsewhere Solar has also specifically stated  that a thread-safe implementation is suboptimal and therefore not a likely candidate for mainstream acceptance. JtR already has an interface to manage various "accelerators" (i.e. machine-specific ASM), and I'm not convinced that wouldn't suffice for a hardware accelerator, "threading" implementation or not.  http://www.openwall.com/lists/john-users/2006/02/06/3  http://www.openwall.com/lists/john-users/2005/10/13/3  http://www.openwall.com/lists/john-users/2005/11/21/2  http://www.openwall.com/lists/john-users/2006/04/27/5 -- To unsubscribe, e-mail john-users-unsubscribe@...ts.openwall.com and reply to the automated confirmation request that will be sent to you.
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