OASIS eXtensible Access Control Markup Language (XACML) TC

OASIS-xacml@ConnectedCommunity.org

Contacts

Chair: Hal Lockhart
harold.w.lochhart@gmail.com

Chair: Bill Parducci
bill@parducci.net

OASIS Staff Contact: Kelly Cullinane
kelly.cullinane@oasis-open.org

Charter

The charter of this TC may be found at http://www.oasis-open.org/committees/xacml/charter.php. Statements regarding IPR related to the work of this TC may be found at http://www.oasis-open.org/committees/xacml/ipr.php

Description

Representing and evaluating access control policies.

Group Notes

Table of Contents

• Announcements

• Overview

• Technical Work Produced by the Committee
  
  
  • Work in Progress

• Expository Work Produced by the Committee

• TC Tools and Approved Publications

• External Resources

• Mailing Lists and Comments

• Additional Information (XACML Implementations)

Announcements

We are pleased to announce the publication of XACML v3.0 Dynamic Attribute Authority Version 1.0 as an OASIS Committee Specification. The full Profile is available at the following link: XACML v3.0 Time Extensions Profile, Version 1.0

We are pleased to announce the publication of XACML v3.0 Related and Nested Entities Profile Version 1.0 as an OASIS Committee Specification. The full Profile is available at the following link: XACML v3.0 Related and Nested Entities Profile, Version 1.0

We are pleased to announce the publication of XACML v3.0 Time Extensions Version 1.0 as an OASIS Committee Specification. The full Profile is available at the following link: XACML v3.0 Dynamic Attribute Authority Profile, Version 1.0

We are pleased to announce the publication of XACML REST Profile Version 1.1 and JSON Profile of XACML 3.0 Version 1.1 as OASIS Standards. Pdf versions are available at the following links: XACML REST Profile: https://docs.oasis-open.org/xacml/xacml-rest/v1.1/os/xacml-rest-v1.1-os.pdf JSON Profile of XACML 3.0: https://docs.oasis-open.org/xacml/xacml-json-http/v1.1/os/xacml-json-http-v1.1-os.pdf

We are pleased to announce the publication of eXtensible Access Control Markup Language (XACML) Version 3.0 Plus Errata 01 OASIS Standard incorporating Approved Errata. A pdf version is available at the following link: eXtensible Access Control Markup Language (XACML) Version 3.0 Plus Errata 01 OASIS Standard incorporating Approved Errata 12 July 2017 Further info is below in the XACML 3.0 section.

We are pleased to announce the publication of eXtensible Access Control Markup Language (XACML) Version 3.0 OASIS Standard. A pdf version is available at the following link: eXtensible Access Control Markup Language (XACML) Version 3.0 OASIS Standard 22 January 2013 Further info is below in the XACML 3.0 section.

XACML 3.0 received the Influential Standardization Efforts Award at the European Identity Conference in Munich, May 2011.

Overview

The XACML Technical Committee defines a core XML schema for representingauthorization and entitlement policies.

For more information, see the TC Charter, FAQ, and "A Brief Introduction to XACML".

Technical Work Produced by the Committee

• Work in progress

• XACML 3.0 Specification Set

• XACML 2.0 Specification Set

• XACML 2.0 Errata

• XACML 1.1 Specification Set

• XACML 1.0 Specification Set

Work in progress:

The following committee specification, working drafts, and submissions represent XACML TC work in progress.

• XACML v3.0 Separation of Duties Version 1.0
  
  
  • Working Directory of Specification Document

  
  
  

XACML 3.0 Specification Set: XACML 3.0 Core and the associated profiles are referenced below

• eXtensible Access Control Markup Language (XACML) Version 3.0, OASIS Standard, 22 January 2013

• Specification Document

• eXtensible Access Control Markup Language (XACML) Version 3.0 Errata 01, Approved Errata, 12 July 2017

• Committee Specification Document

• XACML v3.0 Dynamic Attribute Authority Version 1.0, Committee Specification 01, 25 January 2022

• Committee Specification Document

• XACML v3.0 Related and Nested Entities Profile Version 1.0, Committee Specification 02, 16 February 2021

• Committee Specification Document

• XACML v3.0 Time Extensions Version 1.0, Committee Specification, 01 13 February 2020

• Committee Specification Document

• JSON Profile of XACML 3.0 Version 1.1, OASIS Standard 20, June 2019

• Specification Document

• XACML REST Profile Version 1.1, OASIS Standard, 20 June 2019

• Specification Document

• XACML v3.0 Core and Hierarchical Role Based Access Control (RBAC) Profile Version 1.0, Committee Specification 02, 23 October 2014

• Committee Specification Document

XACML 2.0 Specification Set: XACML 2.0 Core and seven associated profiles were approved as OASIS Standards on 1 February 2005. An eighth profile, XSPA Profile of XACML 2.0 for Healthcare was approved as OASIS Standard on 1 November 2009

• NORMATIVE XACML 2.0 documents (1-Feb-2005)

• ALL XACML 2.0 documents (1-Feb-2005) (includes separate example files and non-normative document formats)

• Individual XACML 2.0 documents:
  
  
  • XACML 2.0 Core: eXtensible Access Control Markup Language (XACML) Version 2.0
    
    
    • Specification Document
    
    
    • Policy Schema
    
    
    • Context Schema
    
    
    
  
  
  • Core and hierarchical role based access control (RBAC) profile of XACML v2.0
    
    
    • Specification Document
    
    
    
  
  
  • Hierarchical resource profile of XACML v2.0
    
    
    • Specification Document
    
    
    
  
  
  • Multiple resource profile of XACML v2.0
    
    
    • Specification Document
    
    
    
  
  
  • Privacy policy profile of XACML v2.0
    
    
    • Specification Document
    
    
    
  
  
  • SAML 2.0 profile of XACML v2.0 (see errata below for corrected version of spec and schemas)
    
    
    • Specification Document
    
    
    • SAML 2.0 Assertion Extension Schema
    
    
    • SAML 2.0 Protocol Extension Schema
    
    
    
  
  
  • XML Digital Signature profile of XACML v2.0
    
    
    • Specification Document
    
    
    
  
  
  • Cross-Enterprise Security and Privacy Authorization (XSPA) Profile of XACML v2.0 for Healthcare Version 1.0, OASIS Standard, 1 November 2009
    
    
    • Specification Document
    
    
    • Related Information:
      
      
      • XSPA Examples v1.0
      
      
      • More info at XSPA TC Home Page
      
      
      
    
    
    
  
  
  

XACML 2.0 Errata: These are non-normative documents that contain TC-approved corrections for errors found in the specifications above.

• XACML 2.0 Core: eXtensible Access Control Markup Language (XACML) Version 2.0
  
  
  • XACML Core Version 2.0 Errata, 29 Jan 2008 (doc file only)
  
  
  • XACML Core Version 2.0 Errata, 5 Jul 2007 (zip file with spec (pdf,doc) and schema(xsd))
  
  
  

• SAML 2.0 profile of XACML v2.0
  
  
  • Corrected assertion schema
  
  
  • Corrected protocol schema
  
  
  • Original corrected profile specification document, SAML 2.0 profile of XACML v2.0 Errata, WD 1, 17 November 2005 (errata against Version 1 of the profile (Note: this is a zip file containing obsolete schema, use schema links above))
  
  
  • Current corrected profile specification document, SAML 2.0 Profile of XACML, Version 2, WD 5, 19 July 2007 (pdf)
  
  
  • See the Work in progress.
  
  
  

XACML 1.1 Specification Set:

• Core Specification: eXtensible Access Control Markup Language (XACML) Version 1.1
  
  
  • Committee Draft 01, 24 July 2003
    
    
    • Specification Document
    
    
    • Specification Document (non-normative format)
    
    
    • Policy Schema
    
    
    • Context Schema

XACML 1.0 Specification Set:

• Core Specification: eXtensible Access Control Markup Language (XACML) Version 1.0
  
  
  • OASIS Standard 1.0, 18 February 2003 OASIS Standard as of 6 Feb. 2003
    
    
    • Specification document
    
    
    • Policy Schema
    
    
    • Context Schema
    
    
    
  
  
  

• XACML Profile for Role Based Access Control (RBAC) Version 1.0:
  
  
  • Committee Draft 01, 13 February 2004
    
    
    • Specification Document
    
    
    
  
  
  

• Other Documents (non-normative)
  
  
  • Errata for XACML 1.0
  
  
  • Conformance Tests for XACML 1.0 and 1.1 (25 March 2004)
  
  
  

The following work items are not currently on a standards track

• XACML 2.0 Conformance Tests (1st bullet is current, remaining bullets historical for ref)
  
  
  • Current tests in Subversion Repository
  
  
  • Draft XACML 2.0 Conformance Tests
  
  
  • Description
  
  
  • Patches to above set
  
  
  • Conformance test changes
  
  
  • To-Do List for XACML 2.0 Conformance Tests

• OASIS Naming Guidelines for XACML, Version 1.4, 3 October 2006.

• Policy Examples

• XACML delegation use-cases

• Web-services policy language use-cases and requirements

The following work items are not currently under active development or discussion, but have not officially been withdrawn.

• eXtensible Access Control Markup Language (XACML) Version 3.0 Policy Distribution Protocol Use-cases and Requirements, WD 01, 8 Oct 2004

• XACML v3.0 improved generality (RuleML) Working Draft 03, 17 March 2005

• Proposed post-2.0 XACML TC Charter, version 1.6, 30 Sept 2004

• LDAP profile for distribution of XACML policies

Expository Work Produced by the Committee

• A Brief Introduction to XACML

• Implementor's Guide

• Changes Since XACML 1.0, 2005

• Webinar: XACML 3.0: Managing Access Control in the Cloud and Beyond, 2011

• Webinar: WS-XACML, Authorization and Privacy Policies for Web Services, 2007

• XACML References

• Interoperability Demonstrations:
  
  
  • XACML 3.0 Interop at RSA 2013, San Francisco, California, 25 Feb 2013
  
  
  • XACML 2.0 Interop at RSA 2008, San Francisco. See Interop scenarios (HealthCare) (zip) from the event.
  
  
  • XACML Interop at RSA Europe 2008, London
  
  
  • SAML/XACML/WS-Trust supporting HITSP TP 20/30 Interop at HIMSS 2009 (conducted under the OASIS Cross-Enterprise Security and Privacy Authorization (XSPA) TC).
  
  
  • XACML 2.0 Interop at Catalyst 2007. See Interop scenarios (Bank Accounts) from the event.

TC Tools and Approved Publications

• OASIS Library for Approved Publications

• TC Wiki

• Issues Management (JIRA)

• TC Github Version control

External Resources

Although not produced by the OASIS XACML TC, the following information offers useful insights into its work:

• XACML LinkedIn Group

Mailing Lists and Comments

xacml: the list used by TC members to conduct Committee work. TC membership required to post. TC members are automatically subscribed; the public may view archives.

xacml-comment: a public mail list for providing input to the OASIS XACML Technical Committee members. Send a comment or view archives.* This list is currently under migration.

xacml-dev: an unmoderated, public mail list that provides an open forum for developers of XACML policy evaluation engine implementations or supporting components and tools to exchange ideas and information on implementing the XACML OASIS Standard. Subscribe or view archives.* This list is currently under migration.

xacml-users: an unmoderated, public mail list that provides an open forum for users of XACML to exchange ideas and information on expressing policies using the XACML OASIS language. Subscribe or view archives.* This list is currently under migration.

xacml-demo-tech: a mailing list restricted to XACML TC members interested in technical aspects of an interoperability demo; archives are also limited to TC members. Subscribe or view archives.* This list is currently under migration.

xacml-demo-mktg: a mailing list restricted to XACML TC members interested in marketing aspects of an interoperability demo; archives are also limited to TC members. Subscribe or view archives.* This list is currently under migration.

*To minimize spam, you must subscribe to these lists before posting.

Available XACML Implementations

It is known that various developers have implemented XACML code andXACML support tools; some of these implementations are publiclyavailable for download. The following are listed here solely for theinformation of parties interested in XACML. By including these links,neither the XACML TC, nor OASIS itself, is endorsing or recommendingthese implementations in any way. This list may be modified at any timeas further information about these or other implementations becomesknown.

• AuthzForce: open source project that provides a XACML 3.0 compliant policy engine, in two forms, depending on your needs:
  
  
  • Java API: AuthzForce provides a XACML 3.0 PDP engine as a Java library that enables applications to use an embedded XACML PDP in Java. More info: https://github.com/authzforce/core/
  
  
  • RESTful API: AuthzForce provides a multi-tenant RESTful API to PDP(s) and PAP(s) that enables web clients to manage policies, request authorization decisions, etc. Developed in the scope of the FIWARE European project. More info: https://github.com/authzforce/server

• University of Florence, IT: FACPL (http://facpl.sf.net), an Eclipse plug-in for the specification and analysis of XACML 3.0 policies. XACML policies can be analysed by automatically translating them into FACPL policies and then by using the FACPL analysis tools.The analysis explicitly addresses missing and additional attributes that could possibly lead to unexpected authorisation decisions.Additional details on the supported properties can be found in the FACPL user's guide.

• OpenAz: Open src project to facilitate the development of a standard XACML-based PDP,PEP Az (AuthoriZation) interface framework (scheduled start: Sep 2009) http://www.openliberty.org/wiki/index.php/Main_Page#OpenAz

• XEngine: A Fast and Scalable XACML Policy Evaluation Engine (High Performance Open Source Java PDP) http://xacmlpdp.sourceforge.net/

• Testing and Verification of Security Policies: This project develops novel techniques and tools for testing and verification of security policies including XACML and firewall policies as well as security models https://sites.google.com/site/asergrp/projects/policy

• pam_xacml: Enable XACML Az for legacy apps (SS5 Socks Server, su, Apache, ...) using "pluggable 'authorization' modules" (PAM) http://pamxacml.sourceforge.net/

• First beta version of XACML 2.0 policy editor: XACML-Studio (XS): http://xacml-studio.sourceforge.net/

• HERAS-AF: An Open Source Project providing an XACML-based Security Framework: http://www.herasaf.org

• XACMLight Apache Axis2 Web Service XACML 2.0 PDP/PAP Implementation (SourceForge.net Maven2 Project - beta): http://sourceforge.net/projects/xacmllight/

• Enterprise Java XACML 2.0 Implementation (Google Code Project - beta): http://code.google.com/p/enterprise-java-xacml/

• Parthenon Computing (formerly Jiffy Software): Parthenon XACML Evaluation Engine: http://www.parthenoncomputing.com

• Sun Microsystems: Sun's XACML Open Source Implementation: http://sunxacml.sourceforge.net

• Lagash Systems: XACML.NET:http://mvpos.sourceforge.net/

• AXESCON LLC: AX2E - AXESCON XACML 2.0 Engine (Beta version): http://axescon.com/ax2e/

• Swedish Institute of Computer Science: XACML 3.0 Administrative Policy support (Beta version): http://www.sics.se/spot/xacml_3_0.html

• University of Murcia (UMU), Spain:Java-based XACML editor: http://xacml.dif.um.es/

• Brown University, US: Margrave, XACML policy verification and change analysis tool: http://www.cs.brown.edu/research/plt/software/margrave/

• UMU NAS-SAML XACML policy infopath templates: http://libra.dif.um.es/~gabilm/designs/nas_saml/

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