SOAPSAMLXACMLPDP.java

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.picketlink.identity.federation.core.pdp;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.security.PrivilegedActionException;

import javax.annotation.Resource;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.ws.Provider;
import javax.xml.ws.WebServiceContext;
import javax.xml.ws.WebServiceProvider;

import org.jboss.security.xacml.core.JBossPDP;
import org.jboss.security.xacml.interfaces.PolicyDecisionPoint;
import org.picketlink.identity.federation.PicketLinkLogger;
import org.picketlink.identity.federation.PicketLinkLoggerFactory;
import org.picketlink.identity.federation.core.saml.v2.util.DocumentUtil;
import org.picketlink.identity.federation.core.saml.v2.util.SOAPSAMLXACMLUtil;
import org.picketlink.identity.federation.core.saml.v2.writers.SAMLResponseWriter;
import org.picketlink.identity.federation.core.util.StaxUtil;
import org.picketlink.identity.federation.core.util.SystemPropertiesUtil;
import org.picketlink.identity.federation.saml.v2.protocol.ResponseType;
import org.picketlink.identity.federation.saml.v2.protocol.XACMLAuthzDecisionQueryType;
import org.w3c.dom.Document;

/**
 * SOAP 1.2 based XACML PDP that accepts SAML requests
 *
 * @author Anil.Saldhana@redhat.com
 * @since Jan 24, 2011
 */
@WebServiceProvider(serviceName = "SOAPSAMLXACMLPDP", portName = "SOAPSAMLXACMLPort", targetNamespace = "urn:picketlink:identity-federation:pdp", wsdlLocation = "WEB-INF/wsdl/SOAPSAMLXACMLPDP.wsdl")
public class SOAPSAMLXACMLPDP implements Provider<Source> {
    
    private static final PicketLinkLogger logger = PicketLinkLoggerFactory.getLogger();

    @Resource
    protected WebServiceContext context;

    protected String policyConfigFileName = "policyConfig.xml";

    protected PolicyDecisionPoint pdp;

    protected String issuer = "PicketLinkPDP";

    public SOAPSAMLXACMLPDP() {
        try {
            pdp = getPDP();
        } catch (PrivilegedActionException e) {
            throw new RuntimeException(e);
        }
    }

    public Source invoke(Source request) {
        try {
            Document doc = (Document) DocumentUtil.getNodeFromSource(request);
            
            if (logger.isTraceEnabled()) {
                logger.trace("XACML Received Message: " + DocumentUtil.asString(doc));
            }
            
            XACMLAuthzDecisionQueryType xacmlQuery = SOAPSAMLXACMLUtil.getXACMLQueryType(doc);
            ResponseType samlResponseType = SOAPSAMLXACMLUtil.handleXACMLQuery(pdp, issuer, xacmlQuery);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            XMLStreamWriter xmlStreamWriter = StaxUtil.getXMLStreamWriter(baos);

            SAMLResponseWriter samlResponseWriter = new SAMLResponseWriter(xmlStreamWriter);
            samlResponseWriter.write(samlResponseType);
            Document responseDocument = DocumentUtil.getDocument(new ByteArrayInputStream(baos.toByteArray()));

            return new DOMSource(responseDocument.getDocumentElement());
        } catch (Exception e) {
            throw logger.xacmlPDPMessageProcessingError(e);
        }
    }

    private PolicyDecisionPoint getPDP() throws PrivilegedActionException {
        SystemPropertiesUtil.ensure();

        URL url = SecurityActions.loadResource(getClass(), policyConfigFileName);
        if (url == null)
            throw logger.fileNotLocated(policyConfigFileName);

        InputStream is;
        try {
            is = url.openStream();
        } catch (IOException e) {
            throw new RuntimeException(logger.resourceNotFound(url.getPath()));
        }
        return new JBossPDP(is);
    }
}