Resource Indicators for OAuth 2.0
draft-ietf-oauth-resource-indicators-01

Document Type Active Internet-Draft (oauth WG)
Last updated 2018-10-19
Replaces draft-campbell-oauth-resource-indicators
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OAuth Working Group                                          B. Campbell
Internet-Draft                                             Ping Identity
Intended status: Standards Track                              J. Bradley
Expires: April 22, 2019                                           Yubico
                                                           H. Tschofenig
                                                             Arm Limited
                                                        October 19, 2018

                   Resource Indicators for OAuth 2.0
                draft-ietf-oauth-resource-indicators-01

Abstract

   An extension to the OAuth 2.0 Authorization Framework defining
   request parameters that enable a client to explicitly signal to an
   authorization server about the location of the protected resource(s)
   to which it is requesting access.

Status of This Memo

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   This Internet-Draft will expire on April 22, 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
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   include Simplified BSD License text as described in Section 4.e of

Campbell, et al.         Expires April 22, 2019                 [Page 1]
Internet-Draft          OAuth Resource Indicators           October 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
     2.1.  Authorization Request . . . . . . . . . . . . . . . . . .   5
     2.2.  Access Token Request  . . . . . . . . . . . . . . . . . .   6
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
     4.1.  OAuth Parameters Registration . . . . . . . . . . . . . .  10
     4.2.  OAuth Extensions Error Registration . . . . . . . . . . .  10
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     5.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .  11
   Appendix B.  Document History . . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

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

   Knowing the protected resource (a.k.a. resource server, application,
   API, etc.) that 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, for example, requires knowing which
   resource will receive and decrypt the token.  Furthermore, various
   resources oftentimes have different requirements with respect to the
   data contained in, or referenced by, the token and knowing the
   resource where the client intends to use the 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 most commonly utilized type of
   OAuth access token, allow any party in possession of a token to get
   access to the associated resources.  To prevent misuse, several
   important security assumptions must hold, one of which is that an
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