<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 28, 2016 at 11:17 AM, Joachim Strömbergson <span dir="ltr"><<a href="mailto:joachim@secworks.se" target="_blank">joachim@secworks.se</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">-----BEGIN PGP SIGNED MESSAGE-----<br>
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Aloha!<br>
<br>
I've just merged a cleaned up version of the chacha core to Cryptech.<br>
The API has not changed (besides bumping version minor from 80 to 81),<br>
but the code is substantially more compact.<br>
<br>
The major behavioral change is that while the core includes four QR<br>
modules, the way they were used they really didn't work in parallel<br>
which meant that performance was much lower that what it should be. For<br>
Cryptech this means that random number generation (and thus key<br>
generation etc) should see improved performance.<br>
<br>
Implementation wise, the API address logic has been simplified.<br>
Registers for key and data has also been changed syntax wise to use<br>
Verilog two dimensional arrays. All tools (simulators, synthesis/build<br>
tools) I have access to including ISE, ModelSim, Quartus parses this<br>
correctly.<br>
<br>
The _core previously sampled inputs into registers. These registers has<br>
been removed which means that if _core is used without the top, the<br>
caller must ensure that the inputs are stable.<br>
<br>
<br>
- --<br>
Med vänlig hälsning, Yours<br>
<br>
Joachim Strömbergson - Alltid i harmonisk svängning.<br>
==============================<wbr>==============================<wbr>============<br>
Joachim Strömbergson Secworks AB <a href="mailto:joachim@secworks.se">joachim@secworks.se</a><br>
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</blockquote></div><br></div><div class="gmail_extra">Is the copyright year for chacha_core.v supposed to change from 2014 to 2011?<br><br></div><div class="gmail_extra">//Olof<br></div></div>