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Date: Thu, 3 Sep 2015 22:46:37 +0300
From: Solar Designer <>
Subject: Re: SHA-1 H()

On Thu, Sep 03, 2015 at 01:27:05AM +0200, magnum wrote:
> On 2015-09-02 17:52, Solar Designer wrote:
> >Attached to this message is a program I used to search for possible
> >optimized expressions like this.  No new findings from it, but it did
> >remind me of the issues I described in these two messages.  I was hoping
> >it might find a 2 operation expression for MD5's I(), but no luck.
> >It doesn't yet test two bitselect()'s per expression, though - this is
> >worth adding and trying again (many possibilities to test there).
> Would you care to explain what it does/outputs or do I need to reverse 
> it? I don't quite get it.

I'm sorry for the confusing code.  It just evolved that way.  Hopefully,
the new revision is slightly better in that its output is easier to use,
and that I posted a message in here with an example, even though the
code might be even more confusing.


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