The OAuth 2.0 Authorization Framework: JWT Secured Authorization Request (JAR)
draft-ietf-oauth-jwsreq-14
| The information below is for an old version of the document | |||
|---|---|---|---|
| Document | Type | Active Internet-Draft (oauth WG) | |
| Last updated | 2017-07-20 | ||
| Replaces | draft-sakimura-oauth-requrl | ||
| Stream | IETF | ||
| Intended RFC status | Proposed Standard | ||
| Formats | pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Hannes Tschofenig | ||
| Shepherd write-up | Show (last changed 2016-10-10) | ||
| IESG | IESG state | IESG Evaluation::AD Followup | |
| Consensus Boilerplate | Yes | ||
| Telechat date |
Has a DISCUSS. Needs 4 more YES or NO OBJECTION positions to pass. |
||
| Responsible AD | Eric Rescorla | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
OAuth Working Group N. Sakimura
Internet-Draft Nomura Research Institute
Intended status: Standards Track J. Bradley
Expires: January 22, 2018 Yubico
July 21, 2017
The OAuth 2.0 Authorization Framework: JWT Secured Authorization Request
(JAR)
draft-ietf-oauth-jwsreq-14
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 are 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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://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 January 22, 2018.
Sakimura & Bradley Expires January 22, 2018 [Page 1]
Internet-Draft OAuth JAR July 2017
Copyright Notice
Copyright (c) 2017 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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 5
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Request Object . . . . . . . . . . . . . . . . . . . . . 6
2.2. Request Object URI . . . . . . . . . . . . . . . . . . . 6
3. Symbols and abbreviated terms . . . . . . . . . . . . . . . . 6
4. Request Object . . . . . . . . . . . . . . . . . . . . . . . 6
5. Authorization Request . . . . . . . . . . . . . . . . . . . . 8
5.1. Passing a Request Object by Value . . . . . . . . . . . . 9
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. 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
10. Security Considerations . . . . . . . . . . . . . . . . . . . 15
10.1. Choice of Algorithms . . . . . . . . . . . . . . . . . . 15
10.2. Request Source Authentication . . . . . . . . . . . . . 15
10.3. Explicit Endpoints . . . . . . . . . . . . . . . . . . . 16
10.4. Risks Associated with request_uri . . . . . . . . . . . 17
10.4.1. DDoS Attack on the Authorization Server . . . . . . 17
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