Date: Sun, 13 Sep 2015 18:54:07 +0200 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: experiment with functions to reject computed hashes On 2015-09-13 18:35, Solar Designer wrote: > On Sun, Sep 13, 2015 at 07:13:56PM +0300, Solar Designer wrote: >> BTW, I think we might in fact want to revert >> the non-iterated SHA-2 GPU formats to prior to Claudio's implementation >> of hash comparisons on GPU, which mostly made things worse (way too slow >> when cracking more than a handful of hashes - turned out to be unusably >> slow in the recent contest). myrice's implementations worked better >> (and IIRC had no GPL restrictions on them too). > > I think we should at the very least re-introduce myrice's latest code as > an alternative. Until Claudio corrects the performance regression when > cracking many hashes, this older code will run faster. And when Claudio > does correct the performance regression, this older code should still be > kept for its relaxed license (and should be the basis for further > enhancements for that reason). I see we dropped Myrice's SHA-512 OpenCL formats (in favor of Claudio's) in Issue #676 because it had bugs and no maintainer. I can easily pull them back. I can't see any SHA-256 from Myrice in our history though? magnum
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