JWK Thumbprint URI
draft-ietf-oauth-jwk-thumbprint-uri-00

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft that was ultimately published as RFC 9278.
Authors Michael B. Jones , Kristina Yasuda
Last updated 2022-01-29
RFC stream Internet Engineering Task Force (IETF)
Formats
txt html xml htmlized bibtex bibxml
Reviews
OPSDIR Last Call review (of -01) by Scott Bradner Has nits
GENART Last Call review (of -01) by Robert Sparks Ready
ARTART Last Call review (of -01) by Gonzalo Salgueiro Ready
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Became RFC 9278 (Proposed Standard)
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)
Email authors Email WG IPR References Referenced by Nits Search email archive
draft-ietf-oauth-jwk-thumbprint-uri-00 
OAuth Working Group                                             M. Jones
Internet-Draft                                                 K. Yasuda
Intended status: Standards Track                               Microsoft
Expires: August 1, 2022                                 January 28, 2022

                           JWK Thumbprint URI
                 draft-ietf-oauth-jwk-thumbprint-uri-00

Abstract

   This specification registers a kind of URI that represents a JSON Web
   Key (JWK) Thumbprint value.  JWK Thumbprints are defined in RFC 7638.
   This enables JWK Thumbprints to be used, for instance, as key
   identifiers in contexts requiring URIs.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 1, 2022.

Copyright Notice

   Copyright (c) 2022 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 & Yasuda           Expires August 1, 2022                 [Page 1]
Internet-Draft             JWK Thumbprint URI               January 2022

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Notation and Conventions . . . . . . . . . . . .   2
   3.  JWK Thumbprint URI  . . . . . . . . . . . . . . . . . . . . .   2
     3.1.  Example JWK Thumbprint URI  . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
     5.1.  OAuth URI Registration  . . . . . . . . . . . . . . . . .   3
       5.1.1.  Registry Contents . . . . . . . . . . . . . . . . . .   3
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   3
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .   4
   Appendix B.  Document History . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   A JSON Web Key (JWK) Thumbprint [RFC7638] is a URL-safe
   representation of a hash value over a JSON Web Key (JWK) [RFC7517].
   This specification defines a URI prefix indicating that the portion
   of the URI following the prefix is a JWK Thumbprint.  This enables
   JWK Thumbprints to be communicated in contexts requiring URIs,
   including in specific JSON Web Token (JWT) [RFC7519] claims.

   JWK Thumbprints URIs are being used in the [SIOPv2] specification as
   one kind of subject identifier in a context requiring that the
   identifier be a URI.  In this case, the subject identifier is derived
   from a public key represented as a JWK.  Expressing the identifier as
   JWK Thumbprint URI enables this kind of identifier to be
   differentiated from other kinds of identifiers that are also URIs,
   such as Decentralized Identifiers (DIDs) [DID-Core].

2.  Requirements Notation and Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

3.  JWK Thumbprint URI

   The following URI prefix is defined to indicate that the portion of
   the URI following the prefix is a JWK Thumbprint:

   o  "urn:ietf:params:oauth:jwk-thumbprint"

Jones & Yasuda           Expires August 1, 2022                 [Page 2]
Internet-Draft             JWK Thumbprint URI               January 2022

   The prefix is followed by a colon and a JWK Thumbprint value to form
   a URI representing a JWK Thumbprint.

3.1.  Example JWK Thumbprint URI

   Section 3.1 of [RFC7638] contains the following example JWK
   Thumbprint value:

     NzbLsXh8uDCcd-6MNwXF4W_7noWXFZAfHkxZsRGC9Xs

   A complete JWK Thumbprint URI using the above JWK Thumbprint is:

  urn:ietf:params:oauth:jwk-thumbprint:NzbLsXh8uDCcd-6MNwXF4W_7noWXFZAfHkxZsRGC9Xs

4.  Security Considerations

   The security considerations of [RFC7638] also apply when using this
   specification.

5.  IANA Considerations

5.1.  OAuth URI Registration

   This specification registers the following value in the IANA "OAuth
   URI" registry [IANA.OAuth.Parameters] established by [RFC6755].

5.1.1.  Registry Contents

   o  URN: urn:ietf:params:oauth:jwk-thumbprint
   o  Common Name: JWK Thumbprint URI
   o  Change controller: IESG
   o  Specification Document: [[ this specification ]]

6.  References

6.1.  Normative References

   [IANA.OAuth.Parameters]
              IANA, "OAuth Parameters",
              <http://www.iana.org/assignments/oauth-parameters>.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

Jones & Yasuda           Expires August 1, 2022                 [Page 3]
Internet-Draft             JWK Thumbprint URI               January 2022

   [RFC7638]  Jones, M. and N. Sakimura, "JSON Web Key (JWK)
              Thumbprint", RFC 7638, DOI 10.17487/RFC7638, September
              2015, <https://www.rfc-editor.org/info/rfc7638>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

6.2.  Informative References

   [DID-Core]
              Sporny, M., Guy, A., Sabadello, M., and D. Reed,
              "Decentralized Identifiers (DIDs) v1.0", Aug 2021,
              <https://www.w3.org/TR/2021/PR-did-core-20210803/>.

   [RFC6755]  Campbell, B. and H. Tschofenig, "An IETF URN Sub-Namespace
              for OAuth", RFC 6755, DOI 10.17487/RFC6755, October 2012,
              <https://www.rfc-editor.org/info/rfc6755>.

   [RFC7517]  Jones, M., "JSON Web Key (JWK)", RFC 7517,
              DOI 10.17487/RFC7517, May 2015,
              <https://www.rfc-editor.org/info/rfc7517>.

   [RFC7519]  Jones, M., Bradley, J., and N. Sakimura, "JSON Web Token
              (JWT)", RFC 7519, DOI 10.17487/RFC7519, May 2015,
              <https://www.rfc-editor.org/info/rfc7519>.

   [SIOPv2]   Yasuda, K. and M. B. Jones, "Self-Issued OpenID Provider
              v2", December 2021, <https://openid.net/specs/openid-
              connect-self-issued-v2-1_0.html>.

Appendix A.  Acknowledgements

   Use cases for this specification were developed in the OpenID Connect
   Working Group of the OpenID Foundation.  Specifically, it is being
   used a key identifier in the [SIOPv2] specification.

   The following individuals also contributed to this specification:
   John Bradley and Adam Lemmon.

Appendix B.  Document History

   [[ to be removed by the RFC Editor before publication as an RFC ]]

   -00

   o  Created initial working group draft from draft-jones-oauth-jwk-
      thumbprint-uri-01.

Jones & Yasuda           Expires August 1, 2022                 [Page 4]
Internet-Draft             JWK Thumbprint URI               January 2022

Authors' Addresses

   Michael B. Jones
   Microsoft

   Email: mbj@microsoft.com
   URI:   https://self-issued.info/

   Kristina Yasuda
   Microsoft

   Email: kryasuda@microsoft.com
   URI:   https://twitter.com/kristinayasuda

Jones & Yasuda           Expires August 1, 2022                 [Page 5]