Secondary Certificate Authentication in HTTP/2
draft-ietf-httpbis-http2-secondary-certs-03

Document Type Active Internet-Draft (httpbis WG)
Last updated 2018-10-23
Replaces draft-bishop-httpbis-http2-additional-certs
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HTTP                                                           M. Bishop
Internet-Draft                                                    Akamai
Intended status: Standards Track                             N. Sullivan
Expires: April 26, 2019                                       Cloudflare
                                                              M. Thomson
                                                                 Mozilla
                                                        October 23, 2018

             Secondary Certificate Authentication in HTTP/2
              draft-ietf-httpbis-http2-secondary-certs-03

Abstract

   A use of TLS Exported Authenticators is described which enables
   HTTP/2 clients and servers to offer additional certificate-based
   credentials after the connection is established.  The means by which
   these credentials are used with requests is defined.

Note to Readers

   Discussion of this draft takes place on the HTTP working group
   mailing list (ietf-http-wg@w3.org), which is archived at
   https://lists.w3.org/Archives/Public/ietf-http-wg/ [1].

   Working Group information can be found at http://httpwg.github.io/
   [2]; source code and issues list for this draft can be found at
   https://github.com/httpwg/http-extensions/labels/secondary-certs [3].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 26, 2019.

Bishop, et al.           Expires April 26, 2019                 [Page 1]
Internet-Draft        Secondary Cert Auth in HTTP/2         October 2018

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Server Certificate Authentication . . . . . . . . . . . .   3
     1.2.  Client Certificate Authentication . . . . . . . . . . . .   4
       1.2.1.  HTTP/1.1 Using TLS 1.2 and Earlier  . . . . . . . . .   5
       1.2.2.  HTTP/1.1 Using TLS 1.3  . . . . . . . . . . . . . . .   6
       1.2.3.  HTTP/2  . . . . . . . . . . . . . . . . . . . . . . .   6
     1.3.  HTTP-Layer Certificate Authentication . . . . . . . . . .   7
     1.4.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   8
   2.  Discovering Additional Certificates at the HTTP/2 Layer . . .   8
     2.1.  Indicating Support for HTTP-Layer Certificate
           Authentication  . . . . . . . . . . . . . . . . . . . . .   8
     2.2.  Making Certificates or Requests Available . . . . . . . .   9
     2.3.  Requiring Certificate Authentication  . . . . . . . . . .  10
       2.3.1.  Requiring Additional Server Certificates  . . . . . .  10
       2.3.2.  Requiring Additional Client Certificates  . . . . . .  11
   3.  Certificates Frames for HTTP/2  . . . . . . . . . . . . . . .  12
     3.1.  The CERTIFICATE_NEEDED Frame  . . . . . . . . . . . . . .  12
     3.2.  The USE_CERTIFICATE Frame . . . . . . . . . . . . . . . .  14
     3.3.  The CERTIFICATE_REQUEST Frame . . . . . . . . . . . . . .  15
       3.3.1.  Exported Authenticator Request Characteristics  . . .  16
     3.4.  The CERTIFICATE Frame . . . . . . . . . . . . . . . . . .  16
       3.4.1.  Exported Authenticator Characteristics  . . . . . . .  17
   4.  Indicating Failures During HTTP-Layer Certificate
       Authentication  . . . . . . . . . . . . . . . . . . . . . . .  18
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
     5.1.  Impersonation . . . . . . . . . . . . . . . . . . . . . .  19
     5.2.  Fingerprinting  . . . . . . . . . . . . . . . . . . . . .  19
     5.3.  Denial of Service . . . . . . . . . . . . . . . . . . . .  19
     5.4.  Confusion About State . . . . . . . . . . . . . . . . . .  20
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
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