Date: Mon, 2 Apr 2012 12:09:06 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: SHA-256 and SHA-512 implementations On Sat, Mar 24, 2012 at 02:05:02AM +0400, Solar Designer wrote: > I've just specified this as a task for GSoC 2012: > > JtR: SIMD and bitslice implementations of SHA-512, SHA-256, SHA-crypt, > other SHA-2 based JtR formats > > The ideas page at http://openwall.info/wiki/ideas gives more detail on > the task. > > While doing it, I did another web search - and surprisingly I found a > closely relevant paper that says it was published on February 13, 2012: > > http://eprint.iacr.org/2012/067.pdf > > Besides a novel idea of how a single SHA-2 digest may be computed with a > SIMD parallelized implementation of the compression function Upon a closer look, I was wrong about that: they parallelize message scheduling, not the compression function. > (great, but > not needed for JtR in particular), this paper gives actual pieces of > code with SSSE3 and AVX2 intrinsics (separately). No license, though. > I might e-mail the authors. I just did. Alexander
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