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Re: [TLS] Working Group Last Call fordraft-ietf-tls-downgrade-scsv-00

Ilari Liusvaara <ilari.liusvaara@elisanet.fi> Tue, 21 October 2014 10:03 UTC

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Date: Tue, 21 Oct 2014 13:03:24 +0300
From: Ilari Liusvaara <ilari.liusvaara@elisanet.fi>
To: Rob Stradling <rob.stradling@comodo.com>
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References: <543F9893.806@redhat.com> <543FA0A0.1030205@polarssl.org> <543FCAED.50502@redhat.com> <543FCC90.7020408@polarssl.org> <1413468247.17221.8.camel@dhcp-2-127.brq.redhat.com> <CADMpkcLf+p5J600gueqzKec4nKuo78Xrr-auW+fyapuqM13Z4w@mail.gmail.com> <1413805668.2597.10.camel@dhcp-2-127.brq.redhat.com> <CABkgnnVzzzLMCcMrUs0QcH1A+RBCgr3qM7bFW339oL7sg2mfqw@mail.gmail.com> <CAFewVt6Khb4CCK4TbyG-D2oO1z=MrwuWSGgwhT98CRMaZ9iM0A@mail.gmail.com> <54462E27.30607@comodo.com>
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Subject: Re: [TLS] Working Group Last Call fordraft-ietf-tls-downgrade-scsv-00
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On Tue, Oct 21, 2014 at 10:57:59AM +0100, Rob Stradling wrote:
> 
> How about negotiating TLS 1.3 using yet another new SCSV?
> 
> Yes, I know, that'd be even more of a hack than negotiating TLS 1.3 with a
> new extension.  But since server-side support for extensions is optional,
> and since there are servers out there that are extension-intolerant, I
> figured I should at least suggest the idea.  ;-)

One needs extensions anyway in order to transport data required for
TLS 1.3 handshake (groups supported and key shares for subset of those).


-Ilari

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