The OAuth 2.0 Authorization Framework: JWT Secured Authorization Request (JAR)
draft-ietf-oauth-jwsreq-30

Document Type Active Internet-Draft (oauth WG)
Authors Nat Sakimura  , John Bradley  , Michael Jones 
Last updated 2020-10-20 (latest revision 2020-09-10)
Replaces draft-sakimura-oauth-requrl
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication
Document shepherd Hannes Tschofenig
Shepherd write-up Show (last changed 2020-10-20)
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IANA IANA review state IANA OK - Actions Needed
IANA action state On Hold
IANA expert review state Expert Reviews OK
IANA expert review comments All OAuth registrations have been approved.
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Details
OAuth Working Group                                          N. Sakimura
Internet-Draft                                            NAT.Consulting
Intended status: Standards Track                              J. Bradley
Expires: March 14, 2021                                           Yubico
                                                                M. Jones
                                                               Microsoft
                                                      September 10, 2020

The OAuth 2.0 Authorization Framework: JWT Secured Authorization Request
                                 (JAR)
                       draft-ietf-oauth-jwsreq-30

Abstract

   The authorization request in OAuth 2.0 described in RFC 6749 utilizes
   query parameter serialization, which means that Authorization Request
   parameters are encoded in the URI of the request and sent through
   user agents such as web browsers.  While it is easy to implement, it
   means that (a) the communication through the user agents is not
   integrity protected and thus the parameters can be tainted, and (b)
   the source of the communication is not authenticated.  Because of
   these weaknesses, several attacks to the protocol have now been put
   forward.

   This document introduces the ability to send request parameters in a
   JSON Web Token (JWT) instead, which allows the request to be signed
   with JSON Web Signature (JWS) and encrypted with JSON Web Encryption
   (JWE) so that the integrity, source authentication and
   confidentiality property of the Authorization Request is attained.
   The request can be sent by value or by reference.

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   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 March 14, 2021.

Sakimura, et al.         Expires March 14, 2021                 [Page 1]
Internet-Draft                  OAuth JAR                 September 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
     2.1.  Request Object  . . . . . . . . . . . . . . . . . . . . .   6
     2.2.  Request Object URI  . . . . . . . . . . . . . . . . . . .   6
   3.  Symbols and abbreviated terms . . . . . . . . . . . . . . . .   6
   4.  Request Object  . . . . . . . . . . . . . . . . . . . . . . .   7
   5.  Authorization Request . . . . . . . . . . . . . . . . . . . .   9
     5.1.  Passing a Request Object by Value . . . . . . . . . . . .  10
     5.2.  Passing a Request Object by Reference . . . . . . . . . .  10
       5.2.1.  URI Referencing the Request Object  . . . . . . . . .  11
       5.2.2.  Request using the "request_uri" Request Parameter . .  12
       5.2.3.  Authorization Server Fetches Request Object . . . . .  12
   6.  Validating JWT-Based Requests . . . . . . . . . . . . . . . .  13
     6.1.  JWE Encrypted Request Object  . . . . . . . . . . . . . .  13
     6.2.  JWS Signed Request Object . . . . . . . . . . . . . . . .  13
     6.3.  Request Parameter Assembly and Validation . . . . . . . .  14
   7.  Authorization Server Response . . . . . . . . . . . . . . . .  14
   8.  TLS Requirements  . . . . . . . . . . . . . . . . . . . . . .  14
   9.  IANA  Considerations  . . . . . . . . . . . . . . . . . . . .  15
     9.1.  OAuth Parameters Registration . . . . . . . . . . . . . .  15
     9.2.  OAuth Authorization Server Metadata Registry  . . . . . .  16
     9.3.  OAuth Dynamic Client Registration Metadata Registry . . .  16
     9.4.  Media Type Registration . . . . . . . . . . . . . . . . .  17
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