Additional OAuth Parameters for Authorization in Constrained Environments (ACE)
draft-ietf-ace-oauth-params-01

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ACE Working Group                                               L. Seitz
Internet-Draft                                                      RISE
Intended status: Standards Track                       November 26, 2018
Expires: May 30, 2019

      Additional OAuth Parameters for Authorization in Constrained
                           Environments (ACE)
                     draft-ietf-ace-oauth-params-01

Abstract

   This specification defines new parameters for the OAuth 2.0 token and
   introspection endpoints when used with framework for authentication
   and authorization for constrained environments (ACE).  These are used
   to express the desired audience of a requested access token, the
   desired proof-of-possession key, the proof-of-possession key that the
   AS has selected, and the key the RS should use to authenticate to the
   client.

Status of This Memo

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   This Internet-Draft will expire on May 30, 2019.

Copyright Notice

   Copyright (c) 2018 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
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Seitz                     Expires May 30, 2019                  [Page 1]
Internet-Draft              ACE-OAuth-Params               November 2018

   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 . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Parameters for the Token Endpoint . . . . . . . . . . . . . .   3
     3.1.  Client-to-AS Request  . . . . . . . . . . . . . . . . . .   3
     3.2.  AS-to-Client Response . . . . . . . . . . . . . . . . . .   4
     3.3.  The Resource Server Confirmation Claim  . . . . . . . . .   6
   4.  Parameters for the Introspection Endpoint . . . . . . . . . .   6
     4.1.  AS-to-RS Response . . . . . . . . . . . . . . . . . . . .   6
   5.  Confirmation Method Parameters  . . . . . . . . . . . . . . .   7
   6.  CBOR Mappings . . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   9
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
     9.1.  JSON Web Token Claims . . . . . . . . . . . . . . . . . .   9
     9.2.  CBOR Web Token Claims . . . . . . . . . . . . . . . . . .   9
     9.3.  OAuth Parameter Registration  . . . . . . . . . . . . . .  10
     9.4.  OAuth Introspection Response Parameter Registration . . .  10
     9.5.  Token Endpoint CBOR Mappings Registraton  . . . . . . . .  11
     9.6.  Introspection Endpoint CBOR Mappings Registraton  . . . .  11
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  11
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     11.2.  Informative References . . . . . . . . . . . . . . . . .  13
   Appendix A.  Overlap with OAuth work  . . . . . . . . . . . . . .  13
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   The Authentication and Authorization for Constrained Environments
   (ACE) specification [I-D.ietf-ace-oauth-authz] requires some new
   parameters for interactions with the OAuth 2.0 [RFC6749] token and
   introspection endpoints, as well as some new claims to be used in
   access tokens.  These parameters and claims can also be used in other
   contexts, and may need to be updated to align them with ongoing OAuth
   work.  Therefore they have been split out into this document, which
   can be used and updated independently of [I-D.ietf-ace-oauth-authz].

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and