be.e_contract.mycarenet.xkms2.ProofOfPossessionSignatureSOAPHandler.java Source code

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Here is the source code for be.e_contract.mycarenet.xkms2.ProofOfPossessionSignatureSOAPHandler.java

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/*
 * Java MyCareNet Project.
 * Copyright (C) 2012 e-Contract.be BVBA.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version
 * 3.0 as published by the Free Software Foundation.
 *
 * 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, see 
 * http://www.gnu.org/licenses/.
 */

package be.e_contract.mycarenet.xkms2;

import java.security.InvalidAlgorithmParameterException;
import java.security.NoSuchAlgorithmException;
import java.util.Collections;
import java.util.Set;

import javax.xml.crypto.MarshalException;
import javax.xml.crypto.dsig.CanonicalizationMethod;
import javax.xml.crypto.dsig.DigestMethod;
import javax.xml.crypto.dsig.Reference;
import javax.xml.crypto.dsig.SignatureMethod;
import javax.xml.crypto.dsig.SignedInfo;
import javax.xml.crypto.dsig.XMLSignature;
import javax.xml.crypto.dsig.XMLSignatureException;
import javax.xml.crypto.dsig.XMLSignatureFactory;
import javax.xml.crypto.dsig.dom.DOMSignContext;
import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;
import javax.xml.crypto.dsig.spec.TransformParameterSpec;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.soap.SOAPMessage;
import javax.xml.soap.SOAPPart;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.handler.soap.SOAPHandler;
import javax.xml.ws.handler.soap.SOAPMessageContext;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import be.e_contract.mycarenet.common.SessionKey;

/**
 * XKMS 2.0 proof-of-possession signature JAX-WS SOAP handler implementation.
 * 
 * @author Frank Cornelis
 * 
 */
public class ProofOfPossessionSignatureSOAPHandler implements SOAPHandler<SOAPMessageContext> {

    private static final Log LOG = LogFactory.getLog(ProofOfPossessionSignatureSOAPHandler.class);

    private SessionKey sessionKey;

    private String prototypeKeyBindingId;

    @Override
    public boolean handleMessage(SOAPMessageContext context) {
        if (null == this.sessionKey) {
            return true;
        }
        if (null == this.prototypeKeyBindingId) {
            return true;
        }

        Boolean outboundProperty = (Boolean) context.get(MessageContext.MESSAGE_OUTBOUND_PROPERTY);
        if (false == outboundProperty) {
            return true;
        }
        LOG.debug("adding proof of possession signature");
        SOAPMessage soapMessage = context.getMessage();
        SOAPPart soapPart = soapMessage.getSOAPPart();

        NodeList registerRequestNodeList = soapPart.getElementsByTagNameNS(XKMS2ServiceFactory.XKMS2_NAMESPACE,
                "RegisterRequest");
        Element registerRequestElement = (Element) registerRequestNodeList.item(0);
        Document xkmsDocument;
        try {
            xkmsDocument = copyDocument(registerRequestElement);
        } catch (ParserConfigurationException e) {
            LOG.error("error copying XKMS request: " + e.getMessage(), e);
            return false;
        }

        NodeList proofOfPossessionNodeList = xkmsDocument
                .getElementsByTagNameNS(XKMS2ServiceFactory.XKMS2_NAMESPACE, "ProofOfPossession");
        Element proofOfPossessionElement = (Element) proofOfPossessionNodeList.item(0);
        try {
            prepareDocument(xkmsDocument);
            addSignature(proofOfPossessionElement);
        } catch (Exception e) {
            LOG.error("error adding proof signature: " + e.getMessage(), e);
            return false;
        }
        Node signatureNode = soapPart.importNode(proofOfPossessionElement.getFirstChild(), true);

        proofOfPossessionNodeList = soapPart.getElementsByTagNameNS(XKMS2ServiceFactory.XKMS2_NAMESPACE,
                "ProofOfPossession");
        proofOfPossessionElement = (Element) proofOfPossessionNodeList.item(0);
        proofOfPossessionElement.appendChild(signatureNode);
        return true;
    }

    private void prepareDocument(Document xkmsDocument) {
        Element prototypeElement = xkmsDocument.getElementById(this.prototypeKeyBindingId);
        if (null == prototypeElement) {
            LOG.warn("Prototype element not found via Id");
            prototypeElement = (Element) xkmsDocument
                    .getElementsByTagNameNS(XKMS2ServiceFactory.XKMS2_NAMESPACE, "PrototypeKeyBinding").item(0);
            prototypeElement.setIdAttribute("Id", true);
        }
    }

    private Document copyDocument(Element element) throws ParserConfigurationException {
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        documentBuilderFactory.setNamespaceAware(true);
        DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
        Document document = documentBuilder.newDocument();
        Node importedNode = document.importNode(element, true);
        document.appendChild(importedNode);
        return document;
    }

    private void addSignature(Element parentElement) throws NoSuchAlgorithmException,
            InvalidAlgorithmParameterException, MarshalException, XMLSignatureException {
        DOMSignContext domSignContext = new DOMSignContext(this.sessionKey.getPrivate(), parentElement);
        XMLSignatureFactory xmlSignatureFactory = XMLSignatureFactory.getInstance("DOM");

        Reference reference = xmlSignatureFactory.newReference("#" + this.prototypeKeyBindingId,
                xmlSignatureFactory.newDigestMethod(DigestMethod.SHA1, null),
                Collections.singletonList(xmlSignatureFactory.newTransform(CanonicalizationMethod.EXCLUSIVE,
                        (TransformParameterSpec) null)),
                null, null);

        SignedInfo signedInfo = xmlSignatureFactory.newSignedInfo(
                xmlSignatureFactory.newCanonicalizationMethod(CanonicalizationMethod.EXCLUSIVE,
                        (C14NMethodParameterSpec) null),
                xmlSignatureFactory.newSignatureMethod(SignatureMethod.RSA_SHA1, null),
                Collections.singletonList(reference));

        XMLSignature xmlSignature = xmlSignatureFactory.newXMLSignature(signedInfo, null);
        xmlSignature.sign(domSignContext);
    }

    @Override
    public boolean handleFault(SOAPMessageContext context) {
        return true;
    }

    @Override
    public void close(MessageContext context) {

    }

    @Override
    public Set<QName> getHeaders() {
        return null;
    }

    public void setSessionKey(SessionKey sessionKey) {
        this.sessionKey = sessionKey;
    }

    public void setPrototypeKeyBindingId(String prototypeKeyBindingId) {
        this.prototypeKeyBindingId = prototypeKeyBindingId;
    }
}