Resource Indicators for OAuth 2.0
draft-ietf-oauth-resource-indicators-00

Document Type Active Internet-Draft (oauth WG)
Last updated 2018-08-03
Replaces draft-campbell-oauth-resource-indicators
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OAuth Working Group                                          B. Campbell
Internet-Draft                                                J. Bradley
Intended status: Standards Track                           Ping Identity
Expires: February 4, 2019                                  H. Tschofenig
                                                             Arm Limited
                                                          August 3, 2018

                   Resource Indicators for OAuth 2.0
                draft-ietf-oauth-resource-indicators-00

Abstract

   This straw-man specification defines an extension to The OAuth 2.0
   Authorization Framework that enables the client and authorization
   server to more explicitly to communicate about the protected
   resource(s) to be accessed.

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 February 4, 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
   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 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

Campbell, et al.        Expires February 4, 2019                [Page 1]
Internet-Draft          OAuth Resource Indicators            August 2018

   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.  Resource Parameter  . . . . . . . . . . . . . . . . . . . . .   3
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
     3.1.  OAuth Parameters Registration . . . . . . . . . . . . . .   5
       3.1.1.  Registry Contents . . . . . . . . . . . . . . . . . .   5
     3.2.  OAuth Extensions Error Registration . . . . . . . . . . .   6
       3.2.1.  Registry Contents . . . . . . . . . . . . . . . . . .   6
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     5.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .   8
   Appendix B.  Document History . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Several years of deployment and implementation experience with OAuth
   2.0 [RFC6749] has uncovered a need, in some circumstances, for the
   client to explicitly signal to the authorization sever where it
   intends to use the access token it is requesting.

   Knowing which resource server will process the access token enables
   the authorization server to construct the token as necessary for that
   entity.  Properly encrypting the token (or content within the token)
   to a particular resource server, for example, requires knowing which
   resource server will receive and decrypt the token.  Furthermore,
   various resource servers oftentimes have different requirements with
   respect to the data contained in, or referenced by, the token and
   knowing the resource server where the client intends to use the s
   token allows the the authorization server to mint the token
   accordingly.

   Specific knowledge of the intended recipient(s) of the access token
   also helps facilitate improved security characteristics of the token
   itself.  Bearer tokens, currently the only defined type of OAuth
   access token, allow any party in possession of a token to get access
   to the associated resources.  To prevent misuse, two important
   security assumptions must hold: bearer tokens must be protected from
   disclosure in storage and in transit and the access token must only
   be valid for use at a specific resource server and for a specific
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