Re: [TLS] WG adoption + early code point assignment: draft-mavrogiannopoulos-chacha-tls

Eric Rescorla <ekr@rtfm.com> Wed, 20 May 2015 16:13 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Wed, 20 May 2015 09:13:10 -0700
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To: Adam Langley <agl@imperialviolet.org>
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Subject: Re: [TLS] WG adoption + early code point assignment: draft-mavrogiannopoulos-chacha-tls
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On Wed, May 20, 2015 at 9:09 AM, Adam Langley <agl@imperialviolet.org>;
wrote:

> On Wed, May 20, 2015 at 8:35 AM, Eric Rescorla <ekr@rtfm.com>; wrote:
> > It will mean that we need a different set of code points than the current
> > ones, right?
>
> Not quite sure that I follow you here:
>
> We will need a different set of code points than the ones currently
> squatted for ChaCha (0xcc13 etc), but the draft already specifies
> that. (And the AEAD construction is slightly different.)
>

Oh, sorry, I hadn't noticed that. I agree with your analysis below.



> However, if we specified the current TLS 1.3 nonce scheme for ChaCha
> in TLS 1.2, but TLS 1.3 changed before it was final, I don't think the
> code points would need to change again. It would just be the case that
> the code points, when used in TLS 1.3, use whatever TLS 1.3 ends up
> doing and, in previous versions, they use what TLS 1.3 does now.
>
>
> Cheers
>
> AGL
>
> --
> Adam Langley agl@imperialviolet.org https://www.imperialviolet.org
>