OAuth 2.0 Demonstration of Proof-of-Possession at the Application Layer (DPoP)
draft-ietf-oauth-dpop-01

Document Type Active Internet-Draft (oauth WG)
Last updated 2020-05-01
Replaces draft-fett-oauth-dpop
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Web Authorization Protocol                                       D. Fett
Internet-Draft                                                   yes.com
Intended status: Standards Track                             B. Campbell
Expires: 2 November 2020                                   Ping Identity
                                                              J. Bradley
                                                                  Yubico
                                                          T. Lodderstedt
                                                                 yes.com
                                                                M. Jones
                                                               Microsoft
                                                                D. Waite
                                                           Ping Identity
                                                              1 May 2020

OAuth 2.0 Demonstration of Proof-of-Possession at the Application Layer
                                 (DPoP)
                        draft-ietf-oauth-dpop-01

Abstract

   This document describes a mechanism for sender-constraining OAuth 2.0
   tokens via a proof-of-possession mechanism on the application level.
   This mechanism allows for the detection of replay attacks with access
   and refresh tokens.

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 2 November 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Fett, et al.             Expires 2 November 2020                [Page 1]
Internet-Draft                 OAuth DPoP                       May 2020

   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
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   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Conventions and Terminology . . . . . . . . . . . . . . .   3
   2.  Main Objective  . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Concept . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  DPoP Proof JWTs . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  DPoP Proof JWT Syntax . . . . . . . . . . . . . . . . . .   6
     4.2.  Checking DPoP Proofs  . . . . . . . . . . . . . . . . . .   7
   5.  Token Request (Binding Tokens to a Public Key)  . . . . . . .   8
   6.  Resource Access (Proof of Possession for Access Tokens) . . .   9
   7.  Public Key Confirmation . . . . . . . . . . . . . . . . . . .  11
   8.  Authorization Server Metadata . . . . . . . . . . . . . . . .  12
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
     9.1.  DPoP Proof Replay . . . . . . . . . . . . . . . . . . . .  13
     9.2.  Signed JWT Swapping . . . . . . . . . . . . . . . . . . .  13
     9.3.  Signature Algorithms  . . . . . . . . . . . . . . . . . .  13
     9.4.  Message Integrity . . . . . . . . . . . . . . . . . . . .  13
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
     10.1.  OAuth Access Token Type Registration . . . . . . . . . .  14
     10.2.  HTTP Authentication Scheme Registration  . . . . . . . .  14
     10.3.  Media Type Registration  . . . . . . . . . . . . . . . .  14
     10.4.  JWT Confirmation Methods Registration  . . . . . . . . .  15
     10.5.  JSON Web Token Claims Registration . . . . . . . . . . .  15
     10.6.  HTTP Message Header Field Names Registration . . . . . .  15
     10.7.  Authorization Server Metadata Registration . . . . . . .  16
   11. Normative References  . . . . . . . . . . . . . . . . . . . .  16
   12. Informative References  . . . . . . . . . . . . . . . . . . .  17
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .  19
   Appendix B.  Document History . . . . . . . . . . . . . . . . . .  19
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21
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