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GeoXACML 3.0 Policy Decision Point

This implementation is an open source implementation of the following approved OGC Standards

This GeoXACML 3.0 implementation is a plugin to the Authzforce CE software stack and tested with Authzforce CE Server version 11.0.1.

This implementation is available under the Apache 2.0 license.

Installation

The following installation instructions were created based on Ubuntu 22.04.2 LTS.

Java 11 SDK

Please install the JAVA 11 SDK plus tools.

sudo apt install -y openjdk-11-jre tomcat9 git curl maven

Install Authzforce CE

Follow the instructions how to deploy the Authzforce CE Server version 11.0.1.

For Ubuntu, the .deb from the maven repository can be used. Please select the option to create the default domain! The further installation will assume that the default domain identifier is A0bdIbmGEeWhFwcKrC9gSQ/.

cd /opt
sudo wget https://repo1.maven.org/maven2/org/ow2/authzforce/authzforce-ce-server-dist/11.0.1/authzforce-ce-server-dist-11.0.1.deb
sudo dpkg -i authzforce-ce-server-dist-11.0.1.deb

The above installs the Authzforce CE Server into /opt/authzforce-ce-server. Please make the data directory writable to Tomcat:

cd /opt/authzforce-ce-server
sudo chown -R tomcat:tomcat data

NOTE: In case the .deb distribution did not create a default domain, or you have choosen no, you need to create a domain yourself. Please execute the following command to create the default domain:

echo '<?xml version="1.0" encoding="UTF-8" standalone="yes"?><domainProperties xmlns="http://authzforce.github.io/rest-api-model/xmlns/authz/5" externalId="default"><description>GeoXACML default domain</description></domainProperties>'|curl -X POST -H 'Content-type: application/xml' -d @- http://localhost:8080/authzforce-ce/domains

The response contains the domain identifier. Please use this identifier as the default domain.

Update Authzforce CE rest-api-model

Please follow the instructions how to update the Rest-API-Model JAR file.

Installation of the GeoXACML 3.0 Policy Decision Point

Simply clone this repository and execute maven to build the JAR.

cd /opt
sudo git clone https://github.com/securedimensions/authzforce-ce-geoxacml3
cd authzforce-ce-geoxacml3
sudo mvn install

To make the GeoXACML plugin work, copy the following files:

sudo cp target/authzforce-ce-geoxacml3-1.0.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo cp target/lib/json-simple-*.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo cp target/lib/jts-core-*.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo cp target/lib/jts-io-common-*.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo cp target/lib/jul-to-slf4j-2.0.5.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo cp target/lib/proj4j-1.1.5.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo cp target/lib/freemarker-2.3.32.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib

In addition, the following files must be upgraded:

sudo cp target/lib/authzforce-ce-core-pdp-engine-20.2.0.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo rm /opt/authzforce-ce-server/webapp/WEB-INF/lib/authzforce-ce-core-pdp-engine-20.1.0.jar
sudo cp target/lib/authzforce-ce-core-pdp-io-xacml-json-20.2.0.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo rm /opt/authzforce-ce-server/webapp/WEB-INF/lib/authzforce-ce-core-pdp-io-xacml-json-20.1.0.jar
sudo cp target/lib/authzforce-ce-core-pdp-api-21.3.0.jar /opt/authzforce-ce-server/webapp/WEB-INF/lib
sudo rm /opt/authzforce-ce-server/webapp/WEB-INF/lib/authzforce-ce-core-pdp-api-21.2.0.jar

Configuration

For enabling the authzforce-ce-geoxacml3 plugin with the Authzforce CE Server deployment, a few configuration steps are required.

Enable the OGC API Common conformance class

The GeoXACML 3.0 Policy Decision Point implements the OGC API Common conformance class via a Tomcat Filter. This filter needs to be activated.

In /opt/authzforce-ce-server/webapp/WEB-INF/web.xml insert the GeoPDP Filter as the last filter. It is also required to add the default Servlet allowing access to the static files required for the HTML page rendering.

Please add the following filter definition after the exceptionFilter filter definition in /opt/authzforce-ce-server/webapp/WEB-INF/web.xml:

<filter>
    <description>The OGC GeoXACML 3.0 Landing Page</description>
    <filter-name>GeoPDP</filter-name>
    <filter-class>de.securedimensions.geoxacml3.pdp.ogc.GeoPDP</filter-class>
</filter>

Please add the following filter mapping after the exceptionFilter filter mapping in /opt/authzforce-ce-server/webapp/WEB-INF/web.xml:

<filter-mapping>
    <filter-name>GeoPDP</filter-name>
    <servlet-name>CXFServlet</servlet-name>
    <url-pattern>/</url-pattern>
    <url-pattern>/api</url-pattern>
    <url-pattern>/conformance</url-pattern>
    <url-pattern>/decision</url-pattern>
    <url-pattern>/cookies.html</url-pattern>
    <url-pattern>/privacy.html</url-pattern>
    <url-pattern>/terms.html</url-pattern>
</filter-mapping>
<servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>/static/*</url-pattern>
</servlet-mapping>

Once you have applied the configuration steps above, open the PDP URL in your Web Browser: http://localhost:8080/authzforce-ce/domains/A0bdIbmGEeWhFwcKrC9gSQ/pdp.

Now, you should see the OGC GeoXACML 3.0 Policy Decision Point Landing Page. GeoPGP Landing Page

Enable GeoXACML extension for decision making

The PDP configuration must be updated to contain the GeoXACML 3.0 geometry data-type and functions. Please replace the following files with the XML from below:

  • /opt/authzforce-ce-server/data/domains/A0bdIbmGEeWhFwcKrC9gSQ/pdp.xml ensures that the default domain supports GeoXACML 3.0
  • /opt/authzforce-ce-server/conf/domain.tmpl/pdp.xml ensures that each newly created domain supports GeoXACML 3.0
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<pdp xmlns="http://authzforce.github.io/core/xmlns/pdp/8" xmlns:ns2="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" version="8.0" standardDatatypesEnabled="true" standardFunctionsEnabled="true" standardCombiningAlgorithmsEnabled="true" standardAttributeProvidersEnabled="true" xPathEnabled="false" strictAttributeIssuerMatch="false" maxIntegerValue="2147483647" maxVariableRefDepth="10" maxPolicyRefDepth="10" clientRequestErrorVerbosityLevel="0">
    <!-- GeoXACML 3.0 Geometry data-type -->
    <attributeDatatype>urn:ogc:def:geoxacml:3.0:data-type:geometry</attributeDatatype>
    <!-- GeoXACML 3.0 Core Geometry Functions -->
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-dimension</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-type</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-srid</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-is-empty</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-is-simple</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-srid-equals</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-ensure-srid</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-precision</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-ensure-precision</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-has-precision</function>
    <!-- GeoXACML 3.0 Core Spatial Relations Functions -->
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-equals</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-disjoint</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-intersects</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-touches</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-crosses</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-within</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-contains</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-overlaps</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-relate</function>
    <!-- GeoXACML 3.0 Core Analysis Functions -->
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-length</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-area</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-distance</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-distance-equals</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-is-within-distance</function>
    <!-- GeoXACML 3.0 Bag/Set Functions  -->
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag-one-and-only</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag-size</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-is-in-bag</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag-to-collection</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag-from-collection</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag-at-least-one-member-of</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag-intersection</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag-union</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-bag-subset</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-set-equals</function>
    <!-- GeoXACML 3.0 Spatial Analysis Functions -->
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-envelope</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-boundary</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-buffer</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-convex-hull</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-intersection</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-union</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-difference</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-sym-difference</function>
    <function>urn:ogc:def:geoxacml:3.0:function:geometry-centroid</function>

    <policyProvider xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns4="http://authzforce.github.io/pap-dao-flat-file/xmlns/pdp-ext/4" xsi:type="ns4:StaticFlatFileDaoPolicyProviderDescriptor" policyLocationPattern="${PARENT_DIR}/policies/*.xml" id="rootPolicyProvider"/>
    <rootPolicyRef policySet="true">root</rootPolicyRef>
    <ioProcChain>
        <!-- GeoXACML 3.0 application/geoxacml+xml pre-processor -->
        <requestPreproc>urn:de:securedimensions:feature:pdp:request-preproc:geoxacml-xml:default-lax</requestPreproc>
    </ioProcChain>
    <ioProcChain>
        <!-- GeoXACML 3.0 application/geoxacml+json pre-processor -->
        <requestPreproc>urn:de:securedimensions:feature:pdp:request-preproc:geoxacml-json:default-lax</requestPreproc>
        <!-- GeoXACML 3.0 application/geoxacml+json post-processor -->
        <resultPostproc>urn:de:securedimensions:feature:pdp:response-postproc:geoxacml-json:default-lax</resultPostproc>
    </ioProcChain>
</pdp>

Enable GeoXACML Media Types

In file /opt/authzforce-ce-server/webapp/WEB-INF/beans.xml

  • Update <beans profile="-fastinfoset"> to include the media types application/geoxacml+json and application/geoxacml+xml. The final edit should look like this:
<util:list id="defaultJsonMediaTypes">
    <value>application/json</value>
</util:list>
<util:list id="xacmlJsonMediaTypes">
    <!-- OASIS JSON Profile of XACML 3.0 -->
    <value>application/xacml+json</value>
    <!-- OGC JSON Profile of GeoXACML 3.0 -->
    <value>application/geoxacml+json</value>
</util:list>
  • Update <bean class="org.ow2.authzforce.jaxrs.util.AcceptMediaTypeCheckingRequestFilter"> to include the media types application/geoxacml+json and application/geoxacml+xml. The final edit should look like this:
<constructor-arg>
  <util:list>
     <value>application/xml</value>
     <!-- IETF RFC 7061 -->
     <value>application/xacml+xml</value>
     <value>application/json</value>
     <!-- OASIS JSON Profile of XACML 3.0 -->
     <value>application/xacml+json</value>
     <!-- GeoXACML 3.0 -->
     <value>application/geoxacml+xml</value>
     <value>application/geoxacml+json</value>
  </util:list>
</constructor-arg>

Configure loading GeoXACML JSON schema

The GeoXACML request and response uses an extended JSON schema. It is therefore required to copy the following files from the conf directory into the /opt/authzforce-ce-server/conf directory.

cd /opt/authzforce-ce-geoxacml3
sudo cp conf/*.json /opt/authzforce-ce-server/conf

Next, update the /etc/tomcat9/Catalina/localhost/authzforce-ce.xml file and update the JSON schema location. Find the environment variable org.ow2.authzforce.domains.xacmlJsonSchemaRelativePath and set the value to Request.schema.json. The final edit should look like this:

<Environment 
        name="org.ow2.authzforce.domains.xacmlJsonSchemaRelativePath" 
        value="Request.schema.json" 
        type="java.lang.String" 
        override="false"
        description="Path to JSON schema file for XACML JSON Profile's Request validation, relative to ${org.ow2.authzforce.config.dir} (if undefined/empty value, the Request.schema.json file from authzforce-ce-xacml-json-model project is used by default)" />

Finally, restart Tomcat:

sudo service tomcat9 restart

Test

The OGC Landing Page can be used to test the basic functionality to ensure that the media types application/geoxacml+xml and application/geoxacml+json are accepted. These tests are basic because the default policy always returns Permit.

Please open the OGC Landing Page in the Web Browser and select openAPI/as HTML from the top menu. Then open the tab POST /decision and click Try it out.

Test Media Type application/geoxacml+xml

Please select the application/geoxacml+xml media type for input and output! Then paste the following as the request body and click Execute:

<Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" xmlns:geoxacml3="http://www.opengis.net/spec/geoxacml/3.0"
         ReturnPolicyIdList="true"
         CombinedDecision="false"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17
 http://docs.oasis-open.org/xacml/3.0/xacml-core-v3-schema-wd-17.xsd">
    <Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject">
        <Attribute AttributeId="subject-location" IncludeInResult="false">
            <AttributeValue geoxacml3:srid="4326" geoxacml3:encoding="WKT" DataType="urn:ogc:def:geoxacml:3.0:data-type:geometry">Point (29.963745015416 -90.029951432619)</AttributeValue>
        </Attribute>
    </Attributes>
</Request>

Alternatively, you could also use CURL:

echo '<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Request xmlns="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17" xmlns:geoxacml3="http://www.opengis.net/spec/geoxacml/3.0" ReturnPolicyIdList="true" CombinedDecision="false" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17 http://docs.oasis-open.org/xacml/3.0/xacml-core-v3-schema-wd-17.xsd"><Attributes Category="urn:oasis:names:tc:xacml:1.0:subject-category:access-subject"><Attribute AttributeId="subject-location" IncludeInResult="false"><AttributeValue geoxacml3:srid="4326" geoxacml3:encoding="WKT" DataType="urn:ogc:def:geoxacml:3.0:data-type:geometry">Point (29.963745015416 -90.029951432619)</AttributeValue></Attribute></Attributes></Request>'|curl -X POST -H 'Content-type: application/geoxacml+xml' -d @- http://localhost:8080/authzforce-ce/domains/A0bdIbmGEeWhFwcKrC9gSQ/pdp

Both options should return the following Permit response:

<?xml version='1.0' encoding='UTF-8'?>
<ns2:Response xmlns:ns6="http://authzforce.github.io/pap-dao-flat-file/xmlns/properties/3.6" xmlns:ns5="http://authzforce.github.io/core/xmlns/pdp/8" xmlns:ns4="http://www.w3.org/2005/Atom" xmlns:ns3="http://authzforce.github.io/rest-api-model/xmlns/authz/5" xmlns:ns2="urn:oasis:names:tc:xacml:3.0:core:schema:wd-17">
  <ns2:Result>
    <ns2:Decision>Permit</ns2:Decision>
    <ns2:PolicyIdentifierList>
      <ns2:PolicyIdReference Version="0.1.0">permit-all</ns2:PolicyIdReference>
      <ns2:PolicySetIdReference Version="0.1.0">root</ns2:PolicySetIdReference>
    </ns2:PolicyIdentifierList>
  </ns2:Result>
</ns2:Response>

Test Media Type application/geoxacml+json

Please select the application/geoxacml+json media type for input and output! Then paste the following as the request body and click Execute:

{
  "Request": {
    "Category": [
      {
        "CategoryId": "urn:oasis:names:tc:xacml:1.0:subject-category:access-subject",
        "Attribute": [
          {
            "AttributeId": "subject-location",
            "DataType": "urn:ogc:def:geoxacml:3.0:data-type:geometry",
	    "SRID": -4711,
            "Value": {
                "type": "Point",
                "coordinates": [11, 47]
            }
          }
        ]
      }
    ]
  }
}

Alternatively, you could also use CURL:

echo '{"Request": {"Category": [{"CategoryId": "urn:oasis:names:tc:xacml:1.0:subject-category:access-subject","Attribute": [{"AttributeId": "subject-location","DataType": "urn:ogc:def:geoxacml:3.0:data-type:geometry","SRID": -4711,"Value": {"type": "Point","coordinates": [11, 47]}}]}]}}'|curl -X POST -H 'Content-type: application/geoxacml+json' -d @- http://localhost:8080/authzforce-ce/domains/A0bdIbmGEeWhFwcKrC9gSQ/pdp

Both options should return the following Permit response:

{"Response":[{"Decision":"Permit"}]}

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