Date: Fri, 15 May 2015 21:47:05 +0800 From: Lei Zhang <zhanglei.april@...il.com> To: john-dev@...ts.openwall.com Subject: Re: lotus85 Sorry it's a bit late when I read through this message. I guess there isn't enough time to do it... Lei > On May 15, 2015, at 8:58 AM, Solar Designer <solar@...nwall.com> wrote: > > Agnieszka, Lei - > > Want to practice optimizing a format where interleaving is actually > expected to be beneficial? lotus85_fmt_plug.c is in need of > optimizations very similar to these: > > git show 57a0e272bbba7187b3240c9c605281100b97515f lotus5_fmt_plug.c > git show f64b42fee9e368cd85cf546f08b694510824fea2 lotus5_fmt_plug.c > > In short, we need proper get_hash*() and binary_hash*() functions, and > 3x interleaving. The former should provide huge speedup when cracking a > large number of hashes per salt (unusual?), and the latter a further > 2x-ish speedup. Oh, and OMP_SCALE needs to be tuned, and > BENCHMARK_LENGTH should be changed from -1 to 0 because this is a salted > format (unlike lotus5). See also: DOMINOSEC_fmt_plug.c (another related > format, for reference). > > These hashes are expected to be seen in the Hash Runner contest starting > later today, so ideally you'd implement the optimizations today (or > perhaps someone else will, and you'll miss the opportunity to practice). > > Thanks, > > Alexander
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