[Babel-users] hmac merge

[Dave Taht]

On Mon, Nov 12, 2018 at 5:06 PM Juliusz Chroboczek <jch at irif.fr> wrote:
>
> >> Yeah, we should just include an implementation of SHA-256 in the code.
>
> > There's also the option...
>
> Given that the main selling point of HMAC vs. DTLS is that it has no
> dependencies, it wouldn't be particularly wise to make the reference
> implementation depend on a Linux-specific library.
>
> Of course, we'll make it easy for distributors to replace our bundled
> implementation of SHA-256 with whatever it is they find convenient.  (I
> expect Dave to replace it with his hand-written implementation that
> interleaves MMX with AVX2 while simultaneously performing modular
> multiplication in the U pipe to hash 27.7 bytes per cycle per core.)
>
> (If you know what the U pipe is, you're old.)

I haven't had fun like that in ages! :) And you forgot that you can
still use the old FPU stack for stuff, if you are careful.

But I'd rather see babel scale past 64k routes, and I really have come
to understand that it's algorithmic first, asm tweaks second.

>
> -- Juliusz
>
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-- 

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740