SAML V2.0 Kerberos Subject Confirmation Method Version 1.0

Committee Draft 01

15 December 2009

Specification URIs:

This Version:

http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-kerberos-subject-confirmation-method-cd-01.html

http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-kerberos-subject-confirmation-method-cd-01.odt(Authoritative)

http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-kerberos-subject-confirmation-method-cd-01.pdf

Previous Version:

N/A

Latest Version:

http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-kerberos-subject-confirmation-method.html

http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-kerberos-subject-confirmation-method.odt

http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-kerberos-subject-confirmation-method.pdf

Technical Committee:

OASIS Security Services TC

Chair(s):

Hal Lockhart, Oracle, Inc.

Thomas Hardjono, MIT

Editor(s):

Josh Howlett, Individual

Thomas Hardjono, MIT

Declared XML Namespace(s):

urn:oasis:names:tc:SAML:2.0:cm:kerberos

Abstract:

This document defines a subject confirmation method for use with the Kerberos protocol.

Status:

This document was last revised or approved by the SSTC on the above date. The level of approval is also listed above. Check the "Latest Version" or "Latest Approved Version" location noted above for possible later revisions of this document.

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The non-normative errata page for this specification is located at http://www.oasis-open.org/committees/security.

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Table of Contents

1 Introduction 5

1.1 Terminology 5

1.2 Normative References 5

2 SAML V2.0 Kerberos Subject Confirmation Method 6

3 Conformance 7

Appendix A. Acknowledgments 8

Appendix B. Revision History 9





1 Introduction

The SAML V2.0 Assertions and Protocols specification defines the <SubjectConfirmation> element which can provide evidence that, when applied to a process known as a Method, may be used by a relying party to confirm that the message came from a system entity that is associated with the subject of an assertion. This specification defines a new subject confirmation method that uses evidence provided by the Kerberos protocol.

1.1 Terminology

The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this specification are to be interpreted as described in IETF RFC 2119 [RFC 2119].

1.2 Normative References

[RFC 2119] S. Bradner. Key words for use in RFCs to Indicate Requirement Levels. IETF RFC 2119, March 1997. http://www.ietf.org/rfc/rfc2119.txt.

[RFC 4120] C. Neuman et al. The Kerberos Network Authentication Service (V5). IETF RFC 4120, July 2005. http://www.ietf.org/rfc/rfc4120.txt.

[SAML2Core] OASIS Standard, Assertions and Protocols for the OASIS Security Assertion Markup Language (SAML) V2.0. OASIS SSTC, March 2005. http://docs.oasis-open.org/security/saml/v2.0/saml-core-2.0-os.pdf

2 SAML V2.0 Kerberos Subject Confirmation Method

URI: urn:oasis:names:tc:SAML:2.0:cm:kerberos

The <KerberosData> element from the XML namespace urn:oasis:names:tc:SAML:2.0:attribute:kerberos MUST be present within the <SubjectConfirmationData> element. This element MUST contain a single instance of either the <KerberosCname> or the <KerberosSname> element. This elements MUST name the Kerberos [RFC 4120] user or service principal that is considered to be the subject of the assertion by the asserting party, subject to optional constraints on confirmation using the attributes that MAY be present in the <SubjectConfirmationData> element, as defined by [SAML2Core].

Example: The Kerberos user principal named "joe@EXAMPLE.ORG" can confirm itself as the subject.

<SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:kerberos">

<SubjectConfirmationData>

<KerberosData>

<KerberosCname>

joe@EXAMPLE.ORG

</KerberosCname>

</KerberosData>

</SubjectConfirmationData>

</SubjectConfirmation>

3 Conformance

An asserting party implementation conforms to this profile if it can produce assertions and other SAML-defined content consistent with the normative text of section 2.

A relying party implementation conforms to this profile if it can accept assertions and other SAML-defined content consistent with the normative text of section 2.





  1. Acknowledgments

The editor would like to acknowledge the contributions of the OASIS Security Services (SAML) Technical Committee, whose voting members at the time of publication were:



The editor would also like to acknowledge the following particular individuals who contributed to the development of this document:







  1. Revision History

Document ID

Date

Committer

Comment

sstc-saml-kerberos-subject-confirmation-method-00

3 Sep 2009

J. Howlett

Initial draft

sstc-saml-attribute-kerberos-cd-01

18 Nov 2009

J. Howlett

Committee Draft 01







sstc-saml-kerberos-subject-confirmation-method-cd-01 15 December 2009
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