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Message-ID: <001101ce3626$5041f4c0$f0c5de40$@net>
Date: Wed, 10 Apr 2013 15:02:21 -0500
From: "jfoug" <jfoug@....net>
To: <john-dev@...ts.openwall.com>
Subject: RE: default_cmp_all
From: magnum [mailto:john.magnum@...hmail.com]
> You mis-read it. Here's the unstable code:
> ... clip
> It tests salt->hash_size, not the same as "salted or not" :-)
So it is not using cmp_all, if there are very few items.
If that is the case, then the original issue reported within raw-sha256-ng's
cmp_all requires correction. cmp_all should return a true value if any value
is found, and false otherwise.
I think a simple change to this will 'fix' it:
return _mm_movemask_epi8 (_mm_cmpeq_epi32 (tmp, zero)) != 0xffff;
Also, I think we should look at making sure there are checks done during
self test, where there are NO matches expected, making sure that cmp_all
returns false.
It's cmp_all is not right. It will always return true. I was running
against the 1500 items in a test suite file, and cmp_all was not being
called.
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