Date: Tue, 5 Apr 2011 05:14:00 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: binary hashes and BINARY_SIZE On Tue, Apr 05, 2011 at 02:52:03AM +0200, magnum wrote: > Thanks a lot for that explanation! I just played with this in my > modified version of NETNTLM and realised this format benefits a lot more > than just saving memory: It originally performs three independant DES > operations in crypt_all() resulting in 24 bytes of output. I made it > just do the first one for partial binaries, and added a crypt_one() that > does the rest but is only called from cmp_exact. BF_fmt.c does a similar thing with non-OpenMP builds, although it does not benefit from that much. Its cmp_exact() calls BF_std_crypt_exact(). Obviously, with a hash type that was not specifically designed to be slow, this can make a lot more of a difference, including with OpenMP. > Not sure I got > everything 100% right yet but there was obviously a significant > performance boost: ... > I'll polish this a bit and post it later. Impressive. Please do share the code (perhaps via the wiki). Thanks, Alexander
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