Assertion Framework for OAuth 2.0
draft-ietf-oauth-assertions-06

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Document Type Active Internet-Draft (oauth WG)
Last updated 2012-09-14
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Stream WG state WG Document Apr 2013
Document shepherd Hannes Tschofenig
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OAuth Working Group                                          B. Campbell
Internet-Draft                                                      Ping
Intended status: Standards Track                            C. Mortimore
Expires: March 18, 2013                                       Salesforce
                                                                M. Jones
                                                               Y. Goland
                                                               Microsoft
                                                      September 14, 2012

                   Assertion Framework for OAuth 2.0
                     draft-ietf-oauth-assertions-06

Abstract

   This specification provides a framework for the use of assertions
   with OAuth 2.0 in the form of a new client authentication mechanism
   and a new authorization grant type.  Mechanisms are specified for
   transporting assertions during interactions with a token endpoint, as
   well as general processing rules.

   The intent of this specification is to provide a common framework for
   OAuth 2.0 to interwork with other identity systems using assertions,
   and to provide alternative client authentication mechanisms.

   Note that this specification only defines abstract message flows and
   processing rules.  In order to be implementable, companion
   specifications are necessary to provide the corresponding concrete
   instantiations.

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
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   This Internet-Draft will expire on March 18, 2013.

Copyright Notice

Campbell, et al.         Expires March 18, 2013                 [Page 1]
Internet-Draft      Assertion Framework for OAuth 2.0     September 2012

   Copyright (c) 2012 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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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Framework  . . . . . . . . . . . . . . . . . . . . . . . . . .  4
   4.  Transporting Assertions  . . . . . . . . . . . . . . . . . . .  7
     4.1.  Using Assertions as Authorization Grants . . . . . . . . .  7
       4.1.1.  Error Responses  . . . . . . . . . . . . . . . . . . .  8
     4.2.  Using Assertions for Client Authentication . . . . . . . .  8
       4.2.1.  Error Responses  . . . . . . . . . . . . . . . . . . .  9
   5.  Assertion Content and Processing . . . . . . . . . . . . . . . 10
     5.1.  Assertion Metamodel  . . . . . . . . . . . . . . . . . . . 10
     5.2.  General Assertion Format and Processing Rules  . . . . . . 11
   6.  Specific Assertion Format and Processing Rules . . . . . . . . 12
     6.1.  Client Authentication  . . . . . . . . . . . . . . . . . . 12
     6.2.  Client Acting on Behalf of Itself  . . . . . . . . . . . . 13
     6.3.  Client Acting on Behalf of a User  . . . . . . . . . . . . 14
     6.4.  Client Acting on Behalf of an Anonymous User . . . . . . . 15
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 15
     7.1.  Forged Assertion . . . . . . . . . . . . . . . . . . . . . 16
     7.2.  Stolen Assertion . . . . . . . . . . . . . . . . . . . . . 16
     7.3.  Unauthorized Disclosure of Personal Information  . . . . . 17
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 18
     8.1.  assertion Parameter Registration . . . . . . . . . . . . . 18
     8.2.  client_assertion Parameter Registration  . . . . . . . . . 18
     8.3.  client_assertion_type Parameter Registration . . . . . . . 18
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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