OAuth 2.0 Token Binding
draft-ietf-oauth-token-binding-01

Document Type Active Internet-Draft (oauth WG)
Last updated 2016-09-20
Replaces draft-jones-oauth-token-binding
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OAuth Working Group                                             M. Jones
Internet-Draft                                                 Microsoft
Intended status: Standards Track                              J. Bradley
Expires: March 24, 2017                                      B. Campbell
                                                           Ping Identity
                                                      September 20, 2016

                        OAuth 2.0 Token Binding
                   draft-ietf-oauth-token-binding-01

Abstract

   This specification enables OAuth 2.0 implementations to apply Token
   Binding to Access Tokens and Refresh Tokens.  This cryptographically
   binds these tokens to the TLS connections over which they are
   intended to be used.  This use of Token Binding protects these tokens
   from man-in-the-middle and token export and replay attacks.

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
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   This Internet-Draft will expire on March 24, 2017.

Copyright Notice

   Copyright (c) 2016 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
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

Jones, et al.            Expires March 24, 2017                 [Page 1]
Internet-Draft           OAuth 2.0 Token Binding          September 2016

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Notation and Conventions . . . . . . . . . .   3
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Token Binding for Refresh Tokens  . . . . . . . . . . . . . .   3
   3.  Token Binding for Access Tokens . . . . . . . . . . . . . . .   4
     3.1.  Access Tokens Issued from the Authorization Endpoint  . .   5
     3.2.  Access Tokens Issued from the Token Endpoint  . . . . . .   5
     3.3.  Protected Resource Token Binding Validation . . . . . . .   5
     3.4.  Representing Token Binding in JWT Access Tokens . . . . .   5
   4.  Phasing in Token Binding and Preventing Downgrade Attacks . .   6
   5.  Token Binding Metadata  . . . . . . . . . . . . . . . . . . .   7
     5.1.  Token Binding Client Metadata . . . . . . . . . . . . . .   7
     5.2.  Token Binding Authorization Server Metadata . . . . . . .   7
     5.3.  Token Binding Protected Resource Metadata . . . . . . . .   7
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
     7.1.  OAuth Dynamic Client Registration Metadata Registration .   8
       7.1.1.  Registry Contents . . . . . . . . . . . . . . . . . .   8
     7.2.  OAuth Authorization Server Metadata Registration  . . . .   8
       7.2.1.  Registry Contents . . . . . . . . . . . . . . . . . .   9
     7.3.  OAuth Protected Resource Metadata Registration  . . . . .   9
       7.3.1.  Registry Contents . . . . . . . . . . . . . . . . . .   9
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   9
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .  11
   Appendix B.  Open Issues  . . . . . . . . . . . . . . . . . . . .  11
   Appendix C.  Document History . . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   This specification enables OAuth 2.0 [RFC6749] implementations to
   apply Token Binding The Token Binding Protocol Version 1.0
   [I-D.ietf-tokbind-protocol] Token Binding over HTTP
   [I-D.ietf-tokbind-https] to Access Tokens and Refresh Tokens.  This
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