Security Assertion Markup Language (SAML) 2.0 Profile for OAuth 2.0 Client Authentication and Authorization Grants
RFC 7522

 
Document Type RFC - Proposed Standard (May 2015; No errata)
Last updated 2015-05-19
Replaces draft-campbell-oauth-saml
Stream IETF
Formats plain text pdf html
Stream WG state Submitted to IESG for Publication Apr 2013
Consensus Yes
Document shepherd Hannes Tschofenig
Shepherd write-up Show (last changed 2014-05-08)
IESG IESG state RFC 7522 (Proposed Standard)
Telechat date
Responsible AD Kathleen Moriarty
Send notices to oauth-chairs@ietf.org, draft-ietf-oauth-saml2-bearer@ietf.org
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack

Email authors IPR References Referenced by Nits Search lists

Internet Engineering Task Force (IETF)                       B. Campbell
Request for Comments: 7522                                 Ping Identity
Category: Standards Track                                   C. Mortimore
ISSN: 2070-1721                                               Salesforce
                                                                M. Jones
                                                               Microsoft
                                                                May 2015

         Security Assertion Markup Language (SAML) 2.0 Profile
      for OAuth 2.0 Client Authentication and Authorization Grants

Abstract

   This specification defines the use of a Security Assertion Markup
   Language (SAML) 2.0 Bearer Assertion as a means for requesting an
   OAuth 2.0 access token as well as for client authentication.

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 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7522.

Copyright Notice

   Copyright (c) 2015 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
   (http://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.

Campbell, et al.             Standards Track                    [Page 1]
RFC 7522              OAuth SAML Assertion Profiles             May 2015

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Notational Conventions  . . . . . . . . . . . . . . . . .   4
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  HTTP Parameter Bindings for Transporting Assertions . . . . .   4
     2.1.  Using SAML Assertions as Authorization Grants . . . . . .   4
     2.2.  Using SAML Assertions for Client Authentication . . . . .   5
   3.  Assertion Format and Processing Requirements  . . . . . . . .   6
     3.1.  Authorization Grant Processing  . . . . . . . . . . . . .   8
     3.2.  Client Authentication Processing  . . . . . . . . . . . .   9
   4.  Authorization Grant Example . . . . . . . . . . . . . . . . .   9
   5.  Interoperability Considerations . . . . . . . . . . . . . . .  11
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   7.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  12
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
     8.1.  Sub-Namespace Registration of
           urn:ietf:params:oauth:grant-type:saml2-bearer . . . . . .  12
     8.2.  Sub-Namespace Registration of
           urn:ietf:params:oauth:client-assertion-type:saml2-bearer   13
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  15
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   The Security Assertion Markup Language (SAML) 2.0
   [OASIS.saml-core-2.0-os] is an XML-based framework that allows
   identity and security information to be shared across security
   domains.  The SAML specification, while primarily targeted at
   providing cross domain Web browser single sign-on (SSO), was also
   designed to be modular and extensible to facilitate use in other
   contexts.

   The Assertion, an XML security token, is a fundamental construct of
   SAML that is often adopted for use in other protocols and
   specifications.  (Some examples include [OASIS.WSS-SAMLTokenProfile]
   and [OASIS.WS-Fed].)  An Assertion is generally issued by an Identity
   Provider and consumed by a Service Provider that relies on its
   content to identify the Assertion's subject for security-related
   purposes.

   The OAuth 2.0 Authorization Framework [RFC6749] provides a method for
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