Additional OAuth Parameters for Authorization in Constrained Environments (ACE)
draft-ietf-ace-oauth-params-13

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ACE Working Group                                               L. Seitz
Internet-Draft                                                 Combitech
Intended status: Standards Track                          April 29, 2020
Expires: October 31, 2020

      Additional OAuth Parameters for Authorization in Constrained
                           Environments (ACE)
                     draft-ietf-ace-oauth-params-13

Abstract

   This specification defines new parameters and encodings for the OAuth
   2.0 token and introspection endpoints when used with the framework
   for authentication and authorization for constrained environments
   (ACE).  These are used to express the proof-of-possession key the
   client wishes to use, the proof-of-possession key that the
   Authorization Server has selected, and the key the Resource Server
   uses to authenticate to the client.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on October 31, 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
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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must

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   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.  Parameters for the Token Endpoint . . . . . . . . . . . . . .   3
     3.1.  Client-to-AS Request  . . . . . . . . . . . . . . . . . .   3
     3.2.  AS-to-Client Response . . . . . . . . . . . . . . . . . .   4
   4.  Parameters for the Introspection Endpoint . . . . . . . . . .   6
   5.  Confirmation Method Parameters  . . . . . . . . . . . . . . .   7
   6.  CBOR Mappings . . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Requirements when using asymmetric keys . . . . . . . . . . .   8
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   9.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   9
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
     10.1.  OAuth Parameter Registration . . . . . . . . . . . . . .   9
     10.2.  OAuth Parameters CBOR Mappings Registration  . . . . . .   9
     10.3.  OAuth Token Introspection Response CBOR Mappings
            Registration . . . . . . . . . . . . . . . . . . . . . .  10
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  10
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     12.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  11

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 have therefore been put into a dedicated document, to
   facilitate their use in a manner independent of
   [I-D.ietf-ace-oauth-authz].

   Note that although all examples are shown in Concise Binary Object
   Respresentation (CBOR) [RFC7049], JSON [RFC8259] MAY be used as an
   alternative for HTTP-based communications, as specified in
   [I-D.ietf-ace-oauth-authz].

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2.  Terminology

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