Date: Wed, 23 Feb 2011 04:13:42 +0300 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: bitslice DES on AVX It turned out that Intel's AVX emulator is trivial to install and use, and it works great under Owl (I had to "rpm -i" an i686 build of glibc onto my x86_64 Owl userland, though). So I am testing this myself now - just not the performance aspect. http://software.intel.com/en-us/articles/intel-software-development-emulator/ On Wed, Feb 23, 2011 at 02:22:54AM +0300, Solar Designer wrote: > If you get this to fail at runtime with other than "Illegal instruction", > please try swapping the "a" and "b" arguments to _mm256_blendv_ps(). It did fail self-tests, both with and without "a" and "b" swapped - so I must have got something else wrong. > I put them in arbitrary order without bothering to look at the > documentation and without checking this in any other way, so there's a > 50% chance I got this wrong. ;-) If this does not help, please try > changing DES_BS from 3 to 1. Changing DES_BS to 1 has helped - self-tests pass now, with 256-bit AVX vectors, although the performance is awful (which is OK since I am using an emulator). solar@owl:~/john/john-1.7.6-avx/src $ ~/avx/sde-ivb-external-3.89-2010-12-23-lin-intel64-and-ia32/sde -- ../run/john -te=1 Benchmarking: Traditional DES [256/256 BS AVX]... DONE Many salts: 45877 c/s real, 46336 c/s virtual Only one salt: 45877 c/s real, 46336 c/s virtual Benchmarking: BSDI DES (x725) [256/256 BS AVX]... DONE Many salts: 1674 c/s real, 1674 c/s virtual Only one salt: 1644 c/s real, 1644 c/s virtual Benchmarking: FreeBSD MD5 [32/64 X2]... DONE Raw: 9817 c/s real, 9916 c/s virtual Benchmarking: OpenBSD Blowfish (x32) [32/64 X2]... DONE Raw: 698 c/s real, 698 c/s virtual Benchmarking: Kerberos AFS DES [48/64 4K]... DONE Short: 346880 c/s real, 346880 c/s virtual Long: 782194 c/s real, 790016 c/s virtual Benchmarking: LM DES [256/256 BS AVX]... DONE Raw: 1016K c/s real, 1016K c/s virtual Benchmarking: generic crypt(3) [?/64]... DONE Many salts: 312576 c/s real, 312576 c/s virtual Only one salt: 310464 c/s real, 310464 c/s virtual Now I need to figure out how to make DES_BS 3 work. Tests on real hardware (with DES_BS set to 1 for now) will help. Thanks, Alexander
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