Authentication Context Certificate Extension
RFC 7773
| Document | Type |
RFC - Proposed Standard
(March 2016; No errata)
Was draft-santesson-auth-context-extension (individual)
|
|
|---|---|---|---|
| Last updated | 2018-12-20 | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Leif Johansson | ||
| Shepherd write-up | Show (last changed 2015-10-12) | ||
| IESG | IESG state | RFC 7773 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Kathleen Moriarty | ||
| Send notices to | stefan@aaa-sec.com, leifj@sunet.se | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | No IANA Actions | ||
Internet Engineering Task Force (IETF) S. Santesson
Request for Comments: 7773 3xA Security
Category: Standards Track March 2016
ISSN: 2070-1721
Authentication Context Certificate Extension
Abstract
This document defines an extension to X.509 certificates. The
extension defined in this document holds data about how the
certificate subject was authenticated by the Certification Authority
that issued the certificate in which this extension appears.
This document also defines one data structure for inclusion in this
extension. The data structure is designed to hold information when
the subject is authenticated using a Security Assertion Markup
Language (SAML) assertion.
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/rfc7773.
Copyright Notice
Copyright (c) 2016 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.
Santesson Standards Track [Page 1]
RFC 7773 Authentication Context Extension March 2016
Table of Contents
1. Introduction ....................................................2
1.1. Terminology ................................................3
2. Authentication Context Extension Syntax .........................4
3. SAML Authentication Context Information .........................4
3.1. contextInfo Data Structure .................................5
3.1.1. AuthContextInfo Element .............................5
3.1.2. IdAttributes Element ................................6
4. Security Considerations .........................................8
5. Normative References ............................................8
Appendix A. ASN.1 Modules .........................................10
A.1. ASN.1 1988 Syntax .........................................10
A.2. ASN.1 2008 Syntax .........................................11
Appendix B. SAML Authentication Context Info XML Schema ...........12
B.1. XML Schema ................................................12
Appendix C. SAML Authentication Context Info XML Examples .........14
C.1. Complete Context Information and Mappings .................14
C.2. Only Mapping Information without SAML Attribute Values ....15
C.3. Authentication Context and serialNumber Mapping ...........16
Author's Address ..................................................16
1. Introduction
The primary purpose of this document is to provide a mechanism that
allows an application to obtain information that expresses the
identity of a subject in an X.509 certificate according to [RFC5280].
The identity is stored either in a subject field attribute, as a
subject alternative name, or in a subject directory attribute.
The motivation for this work is to enable mapping of identity data
between an identity system and a certificate where the identity
system and the certificate are using different attributes and data
formats to express the identity of the same entity. In such a
scenario, the certificate subject already has an authenticated
identity composed of a set of attributes, or so-called claims, that
differ from the set of attributes that are commonly used to express
the identity of a certificate subject and that may be governed by a
specific certificate profile limiting that set.
A typical scenario motivating the definition of this extension arises
when the source of user authentication and user identity is derived
from a SAML [SAML] federation attribute profile. In a SAML
federation, the subject presents a SAML assertion in exchange for a
certificate that can be uniquely linked to information provided in
the original SAML assertion, e.g., attributes and/or level of
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