Has anyone written XACML Implementations other than the Sun XACML Implementation and XEngine?
Who uses them in their products?
Which vendors provide a PDP? I read something about a WebLogic XACML Provider. What other products support XACML?
XACML enables attribute-based access control (ABAC) and can be used for RBAC (see diagram). RBAC grants access rights based on the roles of users, while ABAC uses attributes -- such as resource, system, application or environmental attributes -- to control access.
XACML is an OASIS standard that describes both a policy language and an access control decision request/response language (both written in XML). The policy language is used to describe general access control requirements, and has standard extension points for defining new functions, data types, combining logic, etc.
This has been answered on the XACML TC list already: http://markmail.org/message/w7msffsbi6qzgfoj
XACML is used in a wide variety of industries today. Trying to summarize what's been said
There are 2 types of implementations today:
open-source implementations They are either backed by commercial organizations, foundations, or universities. These include:
Commercial products
There are other vendors such as Jericho Systems and Nextlabs that offer XACML. Also Securent (later bought by CISCO) had a XACML offering.
Lastly I recommend you visit the XACML TC (http://www.oasis-open.org/committees/xacml/) where you can see its contributing members. Those include Oracle, Axiomatics, Boeing, Veterans Administration, EMC who are regular contributors.
I'm a member of the team at IBM that builds a security policy management solution, including XACML for authorization policy; and I used to be the team lead for the XACML runtime component itself. The product is called Tivoli Security Policy Manager, and is definitely under active development.
WebLogic used to be built by BEA, before they were acquired by Oracle. I'm not sure if Oracle still sells it or not.
Axiomatics also has a XACML solution, as does Jericho Systems.
WSO2 Identity Server (http://wso2.org/) is a open source entitlement engine which is based on the sunxacml. WSO2 Identity Server contains a nice XACML UI policy editor which can be easily used to create complex XACML policies. There is a PIP layer to plug any attribute finder module with it. Therefore you are able to find your attribute from any database, LDAP user store , web services and many more .... Also there are decision caching, policy caching and PIP level attribute caching to improve the performance. You can refer the implementation source code from here [1]
[1] https://svn.wso2.org/repos/wso2/branches/carbon/3.2.0/components/identity/org.wso2.carbon.identity.entitlement/
DATEV (a german IT service provider w 5800 employees) announced in 2010 that they will use XACML. Swedish software company Axiomatics will develop a Datev version of its identity management solution.
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