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Message-ID: <20120616235855.GJ31349@cmpxchg8b.com>
Date: Sun, 17 Jun 2012 01:58:55 +0200
From: Tavis Ormandy <taviso@...xchg8b.com>
To: john-dev@...ts.openwall.com
Subject: Re: Re: [patch] optional new raw sha1 implemetation
On Sun, Jun 17, 2012 at 01:46:00AM +0200, Tavis Ormandy wrote:
> On Sun, Jun 17, 2012 at 01:42:07AM +0200, magnum wrote:
> > >>On a third thought, are we not actually guaranteed there will be a
> > >>zero byte? They are zeroed in set_key().
> > >>
> > >>magnum
> > >
> > >I dont think so, for example, consider testing two 15 byte keys, I would
> > >store them in contiguous aligned buffers like this:
> > >
> > >41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 80
> > >41 41 41 41 41 41 41 41 41 41 41 41 41 41 42 80
> > >00 00 00 ...
> > >
> > >get_key(0) with strrchr would return AAAAAAAAA\x80AAAAAAAAAAAB, no?
> >
> > OK, so let's just put a zero in ((unsigned char*)key)[15] before the
> > strrchr. That ought to work fine, right?
> >
> > magnum
>
> Hmm, you mean make key[] in sha1_fmt_get_key 5 instead of 4? Hmm, I think
> that sounds okay.
>
> Tavis.
>
Oh, i think if I put string.h first and #define _GNU_SOURCE, the
prototype becomes visible. I think I'll just do that unless you object.
Annoying that such preprocessor voodoo is required to get such a basic
protoype..wtf.
Tavis.
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