QUIC Version Aliasing
draft-duke-quic-version-aliasing-04

Document Type Active Internet-Draft (individual)
Author Martin Duke 
Last updated 2020-10-30
Replaces draft-ietf-quic-version-aliasing
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QUIC                                                             M. Duke
Internet-Draft                                         F5 Networks, Inc.
Intended status: Experimental                            30 October 2020
Expires: 3 May 2021

                         QUIC Version Aliasing
                  draft-duke-quic-version-aliasing-04

Abstract

   The QUIC transport protocol [QUIC-TRANSPORT] preserves its future
   extensibility partly by specifying its version number.  There will be
   a relatively small number of published version numbers for the
   foreseeable future.  This document provides a method for clients and
   servers to negotiate the use of other version numbers in subsequent
   connections and encrypts Initial Packets using secret keys instead of
   standard ones.  If a sizeable subset of QUIC connections use this
   mechanism, this should prevent middlebox ossification around the
   current set of published version numbers and the contents of QUIC
   Initial packets, as well as improving the protocol's privacy
   properties.

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 3 May 2021.

Copyright Notice

   Copyright (c) 2020 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
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.

Duke                       Expires 3 May 2021                   [Page 1]
Internet-Draft            QUIC Version Aliasing             October 2020

   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text
   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Protocol Overview . . . . . . . . . . . . . . . . . . . . . .   4
   3.  The Version Alias Transport Parameter . . . . . . . . . . . .   4
     3.1.  Version Number Generation . . . . . . . . . . . . . . . .   5
     3.2.  Initial Token Extension (ITE) Generation  . . . . . . . .   5
     3.3.  Salt and Packet Length Offset Generation  . . . . . . . .   6
     3.4.  Expiration Time . . . . . . . . . . . . . . . . . . . . .   6
     3.5.  Format  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.6.  Multiple Servers for One Domain . . . . . . . . . . . . .   8
   4.  Client Behavior . . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Server Actions on Aliased Version Numbers . . . . . . . . . .   9
   6.  Considerations for Retry Packets  . . . . . . . . . . . . . .  10
   7.  Security and Privacy Considerations . . . . . . . . . . . . .  10
     7.1.  Version Downgrade . . . . . . . . . . . . . . . . . . . .  11
     7.2.  Retry Injection . . . . . . . . . . . . . . . . . . . . .  11
     7.3.  Increased Linkability . . . . . . . . . . . . . . . . . .  12
     7.4.  Salt Polling Attack . . . . . . . . . . . . . . . . . . .  12
     7.5.  Increased Processing of Garbage UDP Packets . . . . . . .  13
     7.6.  Increased Retry Overhead  . . . . . . . . . . . . . . . .  13
     7.7.  Request Forgery Attacks . . . . . . . . . . . . . . . . .  13
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  14
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Appendix A.  Acknowledgments  . . . . . . . . . . . . . . . . . .  14
   Appendix B.  Change Log . . . . . . . . . . . . . . . . . . . . .  14
     B.1.  since draft-duke-quic-version-aliasing-03 . . . . . . . .  15
     B.2.  since draft-duke-quic-version-aliasing-02 . . . . . . . .  15
     B.3.  since draft-duke-quic-version-aliasing-01 . . . . . . . .  15
     B.4.  since draft-duke-quic-version-aliasing-00 . . . . . . . .  15
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  15

Duke                       Expires 3 May 2021                   [Page 2]
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