Date: Wed, 25 Jul 2018 14:09:14 +0200 From: Frank Dittrich <frank.dittrich@...lbox.org> To: john-dev@...ts.openwall.com Subject: Re: Exclude items from test vectors for --test Am 25.07.2018 um 14:00 schrieb Solar Designer: > On Wed, Jul 25, 2018 at 01:48:39PM +0200, Frank Dittrich wrote: >> When using --test, john first tests all hashes, then it measures the >> performance with just the top 2 hashes, i.e. 5000 iterations, unless you >> pick other hashes using something like --costs=1021:1021. > > The current behavior appears to be different from what you simulated. > With the actual sha512crypt-ztex format, the speed reported by --test is > now approx. 4 times higher than what's seen when cracking hashes with > 5000 iterations. This suggests that the many lower iteration count test > vectors are used for the benchmark. I described the behaviour for sha512crypt format after switching to the ztex self tests. In this case, --test (with or without --costs) works as expected. Is the ztex format doinf something "unexpected" to the self tests like sorting them in a particular order after loading them? Nevertheless, the reported cost should match reality, and --cost= should allow picking alternative hashes for the perfomance test. Frank
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