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Versions: 00 01 02 03 04 05 06 RFC 7061

Network Working Group                                         R. Sinnema
Internet-Draft                                                  E. Wilde
Intended status: Standards Track                         EMC Corporation
Expires: March 18, 2013                               September 14, 2012


      eXtensible Access Control Markup Language (XACML) Media Type
                   draft-sinnema-xacml-media-type-00

Abstract

   This specification registers an XML-based media type for the
   eXtensible Access Control Markup Language (XACML).

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
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   This Internet-Draft will expire on March 18, 2013.

Copyright Notice

   Copyright (c) 2012 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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  XACML Media Type application/xacml+xml  . . . . . . . . . . . . 3
     2.1.  Media Type Name . . . . . . . . . . . . . . . . . . . . . . 3
     2.2.  Subtype Name  . . . . . . . . . . . . . . . . . . . . . . . 3
     2.3.  Required Parameters . . . . . . . . . . . . . . . . . . . . 3
     2.4.  Optional Parameters . . . . . . . . . . . . . . . . . . . . 3
     2.5.  Encoding Considerations . . . . . . . . . . . . . . . . . . 3
     2.6.  Security Considerations . . . . . . . . . . . . . . . . . . 3
     2.7.  Interoperability Considerations . . . . . . . . . . . . . . 4
     2.8.  Applications which use this media type  . . . . . . . . . . 4
     2.9.  Magic number(s) . . . . . . . . . . . . . . . . . . . . . . 4
     2.10. File extension(s) . . . . . . . . . . . . . . . . . . . . . 5
     2.11. Macintosh File Type Code(s) . . . . . . . . . . . . . . . . 5
     2.12. Person & email address to contact for further
           information . . . . . . . . . . . . . . . . . . . . . . . . 5
     2.13. Intended Usage  . . . . . . . . . . . . . . . . . . . . . . 5
     2.14. Author/Change Controller  . . . . . . . . . . . . . . . . . 6
   3.  Change Log  . . . . . . . . . . . . . . . . . . . . . . . . . . 6
     3.1.  Versions prior to I-D -00 . . . . . . . . . . . . . . . . . 6
   4.  Normative References  . . . . . . . . . . . . . . . . . . . . . 6
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . . . 7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 7



























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1.  Introduction

   This specification registers an XML-based media type for the
   eXtensible Access Control Markup Language (XACML) that will be
   registered with the Internet Assigned Numbers Authority (IANA)
   following the "Media Type Specifications and Registration Procedures"
   [RFC4288].


2.  XACML Media Type application/xacml+xml

   This specification requests the registration of an XML-based media
   type for the eXtensible Access Control Markup Language (XACML).

2.1.  Media Type Name

   application

2.2.  Subtype Name

   xacml+xml

2.3.  Required Parameters

   none

2.4.  Optional Parameters

   charset: The charset parameter is the same as the charset parameter
   of application/xml [RFC3023].

   version: The version parameter indicates the version of the XACML
   specification.  It can be used for content negotiation when dealing
   with components that support multiple XACML versions.  Its range is
   the range of published XACML versions.  As of this writing that is:
   1.0 [XACML-1], 1.1 [XACML-1.1], 2.0 [XACML-2], and 3.0 [XACML-3].
   These and future version identifiers are of the form x.y, where x and
   y are decimal numbers with no leading zeros, with x being positive
   and y being non-negative.

2.5.  Encoding Considerations

   Same as for application/xml [RFC3023].

2.6.  Security Considerations

   Per their specification, application/xacml+xml typed objects do not
   contain executable content.  However, these objects are XML-based,



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   and thus they have all of the general security considerations
   presented in section 10 of RFC 3023 [RFC3023].

   XACML [XACML-3] contains information whose integrity and authenticity
   is important - identity provider and service provider public keys and
   endpoint addresses, for example.  Sections 9.2.1 Authentication and
   9.2.4 Policy integrity in XACML [XACML-3] describe requirements and
   considerations for such authentication and integrity protection.

   To counter potential issues, the publisher may sign application/
   xacml+xml typed objects.  Any such signature should be verified by
   the recipient of the data - both as a valid signature, and as being
   the signature of the publisher.  The XACML v3.0 XML Digital Signature
   Profile [XACML-3-DSig] describes how to use XML-based digital
   signatures with XACML.

   Additionally, various of the possible publication protocols, for
   example HTTPS, offer means for ensuring the authenticity of the
   publishing party and for protecting the policy in transit.

   For a more detailed discussion of XACML policy and its security
   considerations, please see XACML 3.0 [XACML-3] and the associated XML
   Digital Signature Profile [XACML-3].

2.7.  Interoperability Considerations

   XACML 3.0 uses the urn:oasis:names:tc:xacml:3.0:core:schema:wd-17 XML
   namespace URI.  XACML 2.0 uses the
   urn:oasis:names:tc:xacml:2.0:policy XML namespace URI.  Signed XACML
   has a wrapping SAML 2.0 assertion [SAML-2], which uses the
   urn:oasis:names:tc:SAML:2.0:assertion namespace URI.
   Interoperability with SAML is defined by the SAML 2.0 Profile of
   XACML [XACML-3-SAML] for all versions of XACML.

2.8.  Applications which use this media type

   Potentially any application implementing XACML, as well as those
   applications implementing specifications based on XACML.

2.9.  Magic number(s)

   In general, the same as for application/xml [2].  In particular, the
   XML document element of the returned object will be one of xacml:
   Policy, xacml:PolicySet, context:Request, or context:Response.  The
   xacml and context prefixes differ for the various versions of XACML
   as follows:





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   o  1.0 & 1.1: The xacml prefix maps to
      urn:oasis:names:tc:xacml:1.0:policy, the context prefix maps to
      urn:oasis:names:tc:xacml:1.0:context

   o  2.0: The xacml prefix maps to urn:oasis:names:tc:xacml:2.0:policy,
      the context prefix maps to urn:oasis:names:tc:xacml:2.0:context

   o  3.0: Both the xacml and context prefixes map to the namespace URI
      urn:oasis:names:tc:xacml:3.0:core:schema:wd-17

   For signed XACML, the XML document element is saml:Assertion, where
   the saml prefix maps to the SAML 2.0 namespace URI
   urn:oasis:names:tc:SAML:2.0:assertion

2.10.  File extension(s)

   none

2.11.  Macintosh File Type Code(s)

   none

2.12.  Person & email address to contact for further information

   This registration is made on behalf of the OASIS eXtensible Access
   Control Markup Language Technical Committee (XACMLTC).  Please refer
   to the XACMLTC website for current information on committee
   chairperson(s) and their contact addresses:
   http://www.oasis-open.org/committees/xacml/.  Committee members
   should submit comments and potential errata to the
   xacml@lists.oasis-open.org list.  Others should submit them by
   filling out the web form located at http://www.oasis-open.org/
   committees/comments/form.php?wg_abbrev=xacml.

   Additionally, the XACML developer community email distribution list,
   xacml-dev@lists.oasis-open.org, may be employed to discuss usage of
   the application/xacml+xml MIME media type.  The xacml-dev mailing
   list is publicly archived here:
   http://www.oasis-open.org/archives/xacml-dev/.  To post to the xacml-
   dev mailing list, one must subscribe to it.  To subscribe, visit the
   OASIS mailing list page at http://www.oasis-open.org/mlmanage/.

2.13.  Intended Usage

   Common






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2.14.  Author/Change Controller

   The XACML specification sets are a work product of the OASIS
   eXtensible Access Control Markup Language Technical Committee
   (XACMLTC).  OASIS and the XACMLTC have change control over the XACML
   specification sets.


3.  Change Log

   Note to RFC Editor: Please remove this section before publication.

3.1.  Versions prior to I-D -00

   Prior to being published as a I-D document, this document was
   published and revised as an OASIS document with the following
   versions:

   o  2012-02-29 (WD01): Initial revision with one media type.

   o  2012-04-23 (WD02): Added JSON media type.

   o  2012-04-24 (WD03): Fixed layout, typos, and references.  Better
      defined the allowable range of values for the version parameter.


4.  Normative References

   [RFC3023]  Murata, M., St. Laurent, S., and D. Kohn, "XML Media
              Types", RFC 3023, January 2001.

   [RFC4288]  Freed, N. and J. Klensin, "Media Type Specifications and
              Registration Procedures", BCP 13, RFC 4288, December 2005.

   [SAML-2]   Organization for the Advancement of Structured Information
              Standards, "Security Assertion Markup Language (SAML)
              Version 2.0. OASIS Standard", March 2005, <http://
              docs.oasis-open.org/security/saml/v2.0/
              saml-core-2.0-os.pdf>.

   [XACML-1]  Organization for the Advancement of Structured Information
              Standards, "eXtensible Access Control Markup Language
              (XACML) Version 1.0. OASIS Standard", February 2003, <http
              ://www.oasis-open.org/committees/download.php/2406/
              oasis-xacml-1.0.pdf>.

   [XACML-1.1]
              Organization for the Advancement of Structured Information



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              Standards, "eXtensible Access Control Markup Language
              (XACML) Version 1.1. OASIS Committee Specification",
              August 2003, <http://www.oasis-open.org/committees/xacml/
              repository/cs-xacml-specification-1.1.pdf>.

   [XACML-2]  Organization for the Advancement of Structured Information
              Standards, "eXtensible Access Control Markup Language
              (XACML) Version 2.0. OASIS Standard", February 2005, <http
              ://docs.oasis-open.org/xacml/2.0/
              access_control-xacml-2.0-core-spec-os.pdf>.

   [XACML-3]  Organization for the Advancement of Structured Information
              Standards, "eXtensible Access Control Markup Language
              (XACML) Version 3.0. OASIS Committee Specification 01",
              August 2010, <http://docs.oasis-open.org/xacml/3.0/
              xacml-3.0-core-spec-cs-01-en.pdf>.

   [XACML-3-DSig]
              Organization for the Advancement of Structured Information
              Standards, "XACML v3.0 XML Digital Signature Profile
              Version 1.0. OASIS Committee Specification 01",
              August 2010, <http://docs.oasis-open.org/xacml/3.0/
              xacml-3.0-dsig-v1-spec-cs-01-en.pdf>.

   [XACML-3-SAML]
              Organization for the Advancement of Structured Information
              Standards, "SAML 2.0 Profile of XACML, Version 2.0. OASIS
              Committee Specification 01", August 2010, <http://
              docs.oasis-open.org/xacml/3.0/
              xacml-profile-saml2.0-v2-spec-cs-01-en.pdf>.


Appendix A.  Acknowledgements

   The following individuals have participated in the creation of this
   specification and are gratefully acknowledged: Erik Rissanen
   (Axiomatics) and Jonathan Robie (EMC).


Authors' Addresses

   Remon Sinnema
   EMC Corporation

   Email: remon.sinnema@emc.com






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   Erik Wilde
   EMC Corporation

   Email: erik.wilde@emc.com















































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