ABFAB J. Howlett Internet-Draft JANET(UK) Intended status: Standards Track S. Hartman Expires: April 21, 2011 Painless Security October 18, 2010 An AAA Attribute for SAML Constructs draft-ietf-abfab-aaa-saml-00 Abstract This document defines the SAML-Construct attribute for use with AAA protocols. This attribute is used for encapsulating Security Assertion Mark-up Language (SAML) constructs. 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 April 21, 2011. Copyright Notice Copyright (c) 2010 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. Howlett & Hartman Expires April 21, 2011 [Page 1] Internet-Draft An AAA Attribute for SAML Constructs October 2010 1. Introduction This document defines the SAML-Construct attribute for use with AAA protocols. This attribute encapsulates Security Assertion Mark-up Language (SAML) constructs. Howlett & Hartman Expires April 21, 2011 [Page 2] Internet-Draft An AAA Attribute for SAML Constructs October 2010 2. Conventions The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. Howlett & Hartman Expires April 21, 2011 [Page 3] Internet-Draft An AAA Attribute for SAML Constructs October 2010 3. SAML Construct Attribute This attribute contains a SAML construct. This attribute MAY be used with any AAA protocol that can use RADIUS-formatted attributes, such as RADIUS [RFC2865] or DIAMETER [RFC3588]. Where multiple SAML- Construct attributes are included in an AAA protocol message (for example, a RADIUS packet), the Construct field of the attributes are to be concatenated to form a SAML construct. A summary of the SAML-Construct format is shown below. The fields are transmitted from left to right. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | MT | Construct... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 1 Type TBD Length >=4 Construct Type (CT) The Construct Type field is a one octet enumerated field. It takes an integer value denoting the type of SAML construct in the Construct field. TBD SAML Request protocol element TBD SAML Response protocol element All other values are reserved for IANA allocation subject to the provisions of section 5. Construct The Construct field is one or more octets containing a SAML construct. If larger than a single attribute, the SAML construct data MUST be split on 253- octet boundaries over as many attributes as necessary. On reception, the SAML construct is reconstructed by concatenating the contents of all SAML-Construct attributes. Howlett & Hartman Expires April 21, 2011 [Page 4] Internet-Draft An AAA Attribute for SAML Constructs October 2010 4. Security Considerations TODO Howlett & Hartman Expires April 21, 2011 [Page 5] Internet-Draft An AAA Attribute for SAML Constructs October 2010 5. IANA Considerations The following numbers have been assigned in the RADIUS Attribute Types registry. A new RADIUS Attribute Type: SAML-Construct (TDB) The enumerated values of the newly registered RADIUS Attribute Type as defined in this document were assigned at the same time as the new Attribute Type. For the SAML-Construct Attribute: TBD SAML Request protocol element TBD SAML Response protocol element Assignments of additional enumerated values for the RADIUS attributes defined in this document are to be processed as described in [RFC3575], subject to the additional requirements of a published specification. Howlett & Hartman Expires April 21, 2011 [Page 6] Internet-Draft An AAA Attribute for SAML Constructs October 2010 6. References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", RFC 2119, BCP 14, March 1997. [RFC2865] Rigney, C., Willens, S., Rubens, A., and W. Simpson, "Remote Authentication Dial In User Service (RADIUS)", RFC 2865, June 2000. [RFC3575] Aboba, B., "IANA Considerations for RADIUS (Remote Authentication Dial In User Service)", RFC 3575, July 2003. [RFC3588] Calhoun, P., Loughney, J., Guttman, E., Zorn, G., and J. Arkko, "Diameter Base Protocol", RFC 3588, September 2003. Howlett & Hartman Expires April 21, 2011 [Page 7] Internet-Draft An AAA Attribute for SAML Constructs October 2010 Authors' Addresses Josh Howlett JANET(UK) Email: josh.howlett@ja.net Sam Hartman Painless Security Email: hartmans-ietf@mit.edu Howlett & Hartman Expires April 21, 2011 [Page 8]