Re: [TLS] Zero-RTT Data & PSK

Martin Thomson <martin.thomson@gmail.com> Wed, 12 October 2016 00:24 UTC

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From: Martin Thomson <martin.thomson@gmail.com>
Date: Wed, 12 Oct 2016 11:24:01 +1100
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To: Eric Rescorla <ekr@rtfm.com>
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Subject: Re: [TLS] Zero-RTT Data & PSK
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I put a few minor comments on the commit.  Nothing that affects the
technical content though, it looks correct.  (Good catch on SNI, I
think that I missed that one.)

On 12 October 2016 at 03:23, Eric Rescorla <ekr@rtfm.com>; wrote:
> This LGTM. Absent objections I will merge tomorrow
>
> On Tue, Oct 11, 2016 at 9:22 AM, Hannes Tschofenig
> <hannes.tschofenig@gmx.net>; wrote:
>>
>> I gave it a try, see
>>
>> https://github.com/tlswg/tls13-spec/pull/668/commits/91e5b39e5f0ce62a90effdbaf4e3c90ed0d81245
>>
>>
>> Ciao
>> Hannes
>>
>>
>> On 10/10/2016 11:59 PM, Eric Rescorla wrote:
>> > I agree with MT. Hannes, if you want to clean up the text to take into
>> > account MT's comments, I will merge
>> >
>> > On Sat, Sep 10, 2016 at 3:35 AM, Martin Thomson
>> > <martin.thomson@gmail.com <mailto:martin.thomson@gmail.com>> wrote:
>> >
>> >     On 9 September 2016 at 23:37, Hannes Tschofenig
>> >     <hannes.tschofenig@gmx.net <mailto:hannes.tschofenig@gmx.net>>
>> > wrote:
>> >     > I am wondering why I cannot use Zero-RTT with just PSK-based
>> > authentication
>> >     > (without a prior ticket change).
>> >
>> >     I think that you would need to bind more things to the key in that
>> >     case, but I assume that it would be OK if you did so.  You already
>> >     need to pair a PSK with a hash, but if you paired it with a whole
>> >     cipher suite instead and also the ALPN (which could be null), then I
>> >     see no reason not to permit 0-RTT for pure PSK.  (I think that
>> > cipher
>> >     suite + ALPN is sufficient, but someone can correct me if I missed
>> >     anything.)
>> >
>> >     _______________________________________________
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>> >     <https://www.ietf.org/mailman/listinfo/tls>
>> >
>> >
>>
>