Session Traversal Utilities for NAT (STUN) Extension for Third Party Authorization
draft-ietf-tram-turn-third-party-authz-09

The information below is for an old version of the document
Document Type Active Internet-Draft (tram WG)
Last updated 2015-02-05
Stream IETF
Intended RFC status Proposed Standard
Formats plain text pdf html bibtex
Stream WG state Submitted to IESG for Publication (wg milestone: Mar 2016 - Send new authenticat... )
Document shepherd Gonzalo Camarillo
Shepherd write-up Show (last changed 2015-01-15)
IESG IESG state Waiting for AD Go-Ahead
Consensus Boilerplate Unknown
Telechat date
Responsible AD Spencer Dawkins
Send notices to "Gonzalo Camarillo" <gonzalo.camarillo@ericsson.com>
IANA IANA review state Version Changed - Review Needed
IANA action state None
TRAM                                                            T. Reddy
Internet-Draft                                                  P. Patil
Intended status: Standards Track                         R. Ravindranath
Expires: August 9, 2015                                            Cisco
                                                               J. Uberti
                                                                  Google
                                                        February 5, 2015

  Session Traversal Utilities for NAT (STUN) Extension for Third Party
                             Authorization
               draft-ietf-tram-turn-third-party-authz-09

Abstract

   This document proposes the use of OAuth to obtain and validate
   ephemeral tokens that can be used for Session Traversal Utilities for
   NAT (STUN) authentication.  The usage of ephemeral tokens ensures
   that access to a STUN server can be controlled even if the tokens are
   compromised.

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 http://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 August 9, 2015.

Copyright Notice

   Copyright (c) 2015 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
   (http://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

Reddy, et al.            Expires August 9, 2015                 [Page 1]
Internet-Draft      STUN for 3rd party Authorization       February 2015

   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
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Solution Overview . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Obtaining a Token Using OAuth . . . . . . . . . . . . . . . .   4
     4.1.  Key Establishment . . . . . . . . . . . . . . . . . . . .   5
       4.1.1.  DSKPP . . . . . . . . . . . . . . . . . . . . . . . .   6
       4.1.2.  HTTP interactions . . . . . . . . . . . . . . . . . .   6
       4.1.3.  Manual provisioning . . . . . . . . . . . . . . . . .   7
   5.  Forming a Request . . . . . . . . . . . . . . . . . . . . . .   8
   6.  STUN Attributes . . . . . . . . . . . . . . . . . . . . . . .   8
     6.1.  THIRD-PARTY-AUTHORIZATION . . . . . . . . . . . . . . . .   8
     6.2.  ACCESS-TOKEN  . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Receiving a request with ACCESS-TOKEN attribute . . . . . . .  10
   8.  STUN Client . . . . . . . . . . . . . . . . . . . . . . . . .  11
   9.  Usage with TURN . . . . . . . . . . . . . . . . . . . . . . .  12
   10. Operational Considerations  . . . . . . . . . . . . . . . . .  14
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  15
   12. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   13. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  16
   14. References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     14.1.  Normative References . . . . . . . . . . . . . . . . . .  16
     14.2.  Informative References . . . . . . . . . . . . . . . . .  16
   Appendix A.  Sample tickets . . . . . . . . . . . . . . . . . . .  18
   Appendix B.  Interaction between client and authorization server   20
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22

1.  Introduction

   Session Traversal Utilities for NAT (STUN) [RFC5389] provides a
   mechanism to control access via "long-term" username/ password
   credentials that are provided as part of the STUN protocol.  It is
   expected that these credentials will be kept secret; if the
   credentials are discovered, the STUN server could be used by
   unauthorized users or applications.  However, in web applications,
   ensuring this secrecy is typically impossible.

   To address this problem and the ones described in [RFC7376], this
   document proposes the use of third party authorization using OAuth
Show full document text