Network Working Group J. Howlett
Internet Draft JANET(UK)
Intended status: Informational May 25, 2010
Expires: November 2010
A RADIUS attribute for SAML constructs
draft-howlett-radius-saml-attr-00.txt
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Abstract
This document defines the SAML-Construct attribute using the Remote
Authentication Dial In User Service (RADIUS). This attribute is used
for encapsulating Security Assertion Mark-up Language (SAML)
constructs.
Table of Contents
1. Introduction................................................2
2. Conventions used in this document............................2
3. SAML-Construct Attribute.....................................2
4. Security Considerations......................................3
5. IANA Considerations.........................................3
6. References..................................................5
6.1. Normative References....................................5
6.2. Informative References..................................5
7. Acknowledgments.............................................5
1. Introduction
This document defines the SAML-Construct attribute for the Remote
Authentication Dial In User Service (RADIUS). This attribute
encapsulates Security Assertion Mark-up Language (SAML) constructs.
2. Conventions used in this document
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].
3. SAML-Construct Attribute
This attribute contains a SAML [Core] construct. This attribute MAY
be used with any AAA protocol that makes use of RADIUS 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.
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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...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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. It contains a SAML
construct (for example, as defined in [SAMLCore]). 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.
4. Security Considerations
TODO
5. IANA Considerations
The following numbers have been assigned in the RADIUS Attribute
Types registry.
A new RADIUS Attribute Type: SAML-Construct (TDB)
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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.
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6. References
6.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
6.2. Informative References
[Core] Cantor, S., Kemp, J., Philpott, R., and E. Maler,
"Assertions and Protocol for the OASIS Security Assertion
Markup Language (SAML) V2.0", OASIS Standard saml-core-2.0-
os, March 2005.
[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] P. Calhoun, J. Loughney, E. Guttman, G. Zorn, J. Arkko,
"Diameter Base Protocol", RFC 3588, September 2003.
7. Acknowledgments
TODO
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Authors' Addresses
Josh Howlett
JANET(UK)
Email: josh.howlett@ja.net
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