Re: [TLS] Negotiating with known_configuration

Eric Rescorla <ekr@rtfm.com> Tue, 21 July 2015 15:10 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Tue, 21 Jul 2015 17:09:31 +0200
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To: Ilari Liusvaara <ilari.liusvaara@elisanet.fi>
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Subject: Re: [TLS] Negotiating with known_configuration
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On Tue, Jul 21, 2015 at 4:15 PM, Ilari Liusvaara <
ilari.liusvaara@elisanet.fi> wrote:

> On Tue, Jul 21, 2015 at 06:38:28AM -0700, Martin Thomson wrote:
> > On 21 July 2015 at 06:08, Ilari Liusvaara <ilari.liusvaara@elisanet.fi>
> wrote:
> > > Well, if it is about supported ciphers, there could be multiple, and
> > > the proposal has slot for only one.
> >
> > The proposal is for what the client selects and uses for its first
> flight.
>
> Oh darn, mislooked what message it was.
>
>
> Also, with regard to ending 0RTT, even without encrypted content
> types. Either I am misunderstanding something, or:
>
> - Client: Send ClientHello.
> - Server: Read ClientHello.
> - Client: Send 0-RTT & client cert.
> - Server: Read 0-RTT & client cert.
> - Client: Wait for server reply.
> - Server: Wait for handshake message to end 0-RTT.
> *deadlock*.


Is this the case where the server is accepting 0-RTT or  rejecting it?

-Ekr


>
> -Ilari
>