Re: [TLS] early IANA code point assignment request for draft-ietf-tls-ecdhe-psk-aead

Ilari Liusvaara <ilariliusvaara@welho.com> Tue, 08 November 2016 06:07 UTC

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Date: Tue, 8 Nov 2016 08:07:47 +0200
From: Ilari Liusvaara <ilariliusvaara@welho.com>
To: Daniel Migault <daniel.migault@ericsson.com>
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Subject: Re: [TLS] early IANA code point assignment request for draft-ietf-tls-ecdhe-psk-aead
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On Mon, Nov 07, 2016 at 10:16:13PM -0500, Daniel Migault wrote:
> Hi,
> 
> The current draft is only considering TLS1.2. TLS1.3 is only mentioned for
> advocating AEAD.
> 
> Do you think we should add text that details how to proceed with TLS1.3 ?
> If so what do you think of the following text ?
 
That is, I think the dependency on TLS 1.3 should be downgraded to
informative (unless that has already been done).

> 
> Yours,
> Daniel
> 
>    The assigned code points are only expected to be used for TLS1.2.
>    TLS1.3 does not follow the same name convention.  Instead TLS1.3
>    cipher suites are designated according to the AEAD suite as well as
>    the hash function used.  The current combination of AEAD algorithms
>    and Hash fucntion are already defined in TLS.1.3 so there is no need
>    to add additional cipher suites for TLS1.3.

Seems reasonable.

>    Instead, in order to used the following ECDHE_PSK authentication
>    method.  TLS1.3 uses a combination of the "key_share" and
>    "psk_key_exchange_modes" extentions. "psk_key_exchange_modes"
>    extension sets its mode to psk_dhe_ke.  The "key_share" extention
>    contains a KeyShareEntry structure that carries the ECDHE parameters.
> 

I think 'used the following' -> 'use the' and first period should be
comma.


-Ilari