Date: Sun, 26 Apr 2015 00:33:42 +0300 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: [GSoC] John the Ripper support for PHC finalists On Sun, Apr 26, 2015 at 12:31:49AM +0300, Solar Designer wrote: > On Sat, Apr 25, 2015 at 10:28:31PM +0200, Agnieszka Bielec wrote: > > 2015-04-25 21:20 GMT+02:00 Solar Designer <solar@...nwall.com>: > > > "4 GPU units" sounded weird and confusing to me. > > > If you put a hash of a known password in a text file, and put the > > > password somewhere down a wordlist, and run "john" with pomelo-opencl > > > against that, will it crack the hash? > > > > It works > > Can you explain how/why it works? I am probably missing something. > I would expect it to fail most of the time. Oh, maybe it happens to work precisely because those 4 work-items tend to be part of the same SIMD vector in hardware, so with current OpenCL drivers they happen to be "guaranteed" to be ready at the same time? Alexander
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