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You mean sending both of those messages in series?  This would be
equivalent to sending a second Certificate message, so whatever TLS says
should happen in that case (I assume it's unexpected_message alert).

On Wed, Dec 13, 2017 at 12:30 PM, Sean Turner <sean@sn3rd.com> wrote:

> What should happen when my silly implementation sends both the Certificate
> and CompressedCertificate messages?
>
> spt
>
> > On Dec 9, 2017, at 07:21, internet-drafts@ietf.org wrote:
> >
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> > This draft is a work item of the Transport Layer Security WG of the IETF.
> >
> >        Title           : Transport Layer Security (TLS) Certificate
> Compression
> >        Authors         : Alessandro Ghedini
> >                          Victor Vasiliev
> >       Filename        : draft-ietf-tls-certificate-compression-01.txt
> >       Pages           : 7
> >       Date            : 2017-12-09
> >
> > Abstract:
> >   In Transport Layer Security (TLS) handshakes, certificate chains
> >   often take up the majority of the bytes transmitted.
> >
> >   This document describes how certificate chains can be compressed to
> >   reduce the amount of data transmitted and avoid some round trips.
> >
> >
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-ietf-tls-certificate-compression/
> >
> > There are also htmlized versions available at:
> > https://tools.ietf.org/html/draft-ietf-tls-certificate-compression-01
> > https://datatracker.ietf.org/doc/html/draft-ietf-tls-
> certificate-compression-01
> >
> > A diff from the previous version is available at:
> > https://www.ietf.org/rfcdiff?url2=draft-ietf-tls-
> certificate-compression-01
> >
> >
> > Please note that it may take a couple of minutes from the time of
> submission
> > until the htmlized version and diff are available at tools.ietf.org.
> >
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> >
> > _______________________________________________
> > TLS mailing list
> > TLS@ietf.org
> > https://www.ietf.org/mailman/listinfo/tls
>
> _______________________________________________
> TLS mailing list
> TLS@ietf.org
> https://www.ietf.org/mailman/listinfo/tls
>

Re: [TLS] I-D Action: draft-ietf-tls-certificate-compression-01.txt