MASQUE Obfuscation
draft-schinazi-masque-obfuscation-00

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Network Working Group                                        D. Schinazi
Internet-Draft                                                Google LLC
Intended status: Experimental                             8 January 2020
Expires: 11 July 2020

                           MASQUE Obfuscation
                  draft-schinazi-masque-obfuscation-00

Abstract

   This document describes MASQUE Obfuscation.  MASQUE Obfuscation is a
   mechanism that allows co-locating and obfuscating networking
   applications behind an HTTPS web server.  The currently prevalent
   use-case is to allow running a proxy or VPN server that is
   indistinguishable from an HTTPS server to any unauthenticated
   observer.  We do not expect major providers and CDNs to deploy this
   behind their main TLS certificate, as they are not willing to take
   the risk of getting blocked, as shown when domain fronting was
   blocked.  An expected use would be for individuals to enable this
   behind their personal websites via easy to configure open-source
   software.

   This document is a straw-man proposal.  It does not contain enough
   details to implement the protocol, and is currently intended to spark
   discussions on the approach it is taking.  Discussion of this work is
   encouraged to happen on the MASQUE IETF mailing list masque@ietf.org
   (mailto:masque@ietf.org) or on the GitHub repository which contains
   the draft: https://github.com/DavidSchinazi/masque-drafts
   (https://github.com/DavidSchinazi/masque-drafts).

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 11 July 2020.

Schinazi                  Expires 11 July 2020                  [Page 1]
Internet-Draft             MASQUE Obfuscation               January 2020

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.
   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions and Definitions . . . . . . . . . . . . . . .   3
   2.  Usage Scenarios . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Protection from Network Providers . . . . . . . . . . . .   3
     2.2.  Protection from Web Servers . . . . . . . . . . . . . . .   3
     2.3.  Onion Routing . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Invisibility of Usage . . . . . . . . . . . . . . . . . .   4
     3.2.  Invisibility of the Server  . . . . . . . . . . . . . . .   4
     3.3.  Fallback to HTTP/2 over TLS over TCP  . . . . . . . . . .   4
   4.  Overview of the Mechanism . . . . . . . . . . . . . . . . . .   5
   5.  Connection Resumption . . . . . . . . . . . . . . . . . . . .   5
   6.  Path MTU Discovery  . . . . . . . . . . . . . . . . . . . . .   5
   7.  Operation over HTTP/2 . . . . . . . . . . . . . . . . . . . .   5
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
     8.1.  Traffic Analysis  . . . . . . . . . . . . . . . . . . . .   6
     8.2.  Untrusted Servers . . . . . . . . . . . . . . . . . . . .   7
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   7
     10.2.  Informative References . . . . . . . . . . . . . . . . .   8
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .   9
   Design Justifications . . . . . . . . . . . . . . . . . . . . . .   9
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   This document describes MASQUE Obfuscation.  MASQUE Obfuscation is a
   mechanism that allows co-locating and obfuscating networking
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