OAuth 2.0 Authorization Server Metadata
RFC 8414

Document Type RFC - Proposed Standard (June 2018; No errata)
Last updated 2018-06-28
Replaces draft-jones-oauth-discovery
Stream IETF
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Stream WG state Submitted to IESG for Publication (wg milestone: Mar 2017 - Submit 'OAuth 2.0 Au... )
Document shepherd Hannes Tschofenig
Shepherd write-up Show (last changed 2017-04-10)
IESG IESG state RFC 8414 (Proposed Standard)
Consensus Boilerplate Yes
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Responsible AD Eric Rescorla
Send notices to Hannes Tschofenig <Hannes.Tschofenig@gmx.net>
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                          M. Jones
Request for Comments: 8414                                     Microsoft
Category: Standards Track                                    N. Sakimura
ISSN: 2070-1721                                                      NRI
                                                              J. Bradley
                                                                  Yubico
                                                               June 2018

                OAuth 2.0 Authorization Server Metadata

Abstract

   This specification defines a metadata format that an OAuth 2.0 client
   can use to obtain the information needed to interact with an
   OAuth 2.0 authorization server, including its endpoint locations and
   authorization server capabilities.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8414.

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
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Jones, et al.                Standards Track                    [Page 1]
RFC 8414         OAuth 2.0 Authorization Server Metadata       June 2018

Table of Contents

   1. Introduction ....................................................2
      1.1. Requirements Notation and Conventions ......................3
      1.2. Terminology ................................................3
   2. Authorization Server Metadata ...................................4
      2.1. Signed Authorization Server Metadata .......................8
   3. Obtaining Authorization Server Metadata .........................8
      3.1. Authorization Server Metadata Request ......................9
      3.2. Authorization Server Metadata Response ....................10
      3.3. Authorization Server Metadata Validation ..................11
   4. String Operations ..............................................11
   5. Compatibility Notes ............................................11
   6. Security Considerations ........................................12
      6.1. TLS Requirements ..........................................12
      6.2. Impersonation Attacks .....................................12
      6.3. Publishing Metadata in a Standard Format ..................13
      6.4. Protected Resources .......................................13
   7. IANA Considerations ............................................14
      7.1. OAuth Authorization Server Metadata Registry ..............14
           7.1.1. Registration Template ..............................15
           7.1.2. Initial Registry Contents ..........................16
      7.2. Updated Registration Instructions .........................19
      7.3. Well-Known URI Registry ...................................19
           7.3.1. Registry Contents ..................................19
   8. References .....................................................20
      8.1. Normative References ......................................20
      8.2. Informative References ....................................22
   Acknowledgements ..................................................23
   Authors' Addresses ................................................23

1.  Introduction

   This specification generalizes the metadata format defined by "OpenID
   Connect Discovery 1.0" [OpenID.Discovery] in a way that is compatible
   with OpenID Connect Discovery while being applicable to a wider set
   of OAuth 2.0 use cases.  This is intentionally parallel to the way
   that "OAuth 2.0 Dynamic Client Registration Protocol" [RFC7591]
   generalized the dynamic client registration mechanisms defined by
   "OpenID Connect Dynamic Client Registration 1.0"
   [OpenID.Registration] in a way that is compatible with it.

   The metadata for an authorization server is retrieved from a well-
   known location as a JSON [RFC8259] document, which declares its
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