trunk/src/org/apache/ws/security/message/token/SignatureConfirmation.java

/*
 * Copyright  2003-2004 The Apache Software Foundation.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package org.apache.ws.security.message.token;

import org.apache.ws.security.WSConstants;
import org.apache.ws.security.WSSecurityException;
import org.apache.ws.security.util.DOM2Writer;
import org.apache.ws.security.util.WSSecurityUtil;
import org.apache.ws.security.util.Base64;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;


/**
 * Signature Confirmation element.
 *
 *
 * @author Werner Dittmann (Werner.Dittmann@t-online.de)
 */
public class SignatureConfirmation {

    private static final String VALUE = "Value"; 
    protected Element element = null;
    private byte[] signatureValue = null;
    /**
     * Constructs a <code>SignatureConfirmation</code> object and parses the
     * <code>wsse11:SignatureCOnfirmation</code> element to initialize it.
     *
     * @param elem the <code>wsse11:SignatureCOnfirmation</code> element that
     *             contains the confirmation data
     */
    public SignatureConfirmation(Element elem) throws WSSecurityException {

        element = elem;
        String sv = element.getAttributeNS(null, VALUE);
        if (sv != null) {
            signatureValue = Base64.decode(sv);
        }
    }

    /**
     * Constructs a <code>SignatureConfirmation</code> object according
     * to the defined parameters.
     * <p/>
     *
     * @param doc the SOAP envelope as <code>Document</code>
     * @param signVal the Signature value as byte[] of <code>null</code> 
     *   if no value available.
     */
    public SignatureConfirmation(Document doc, byte[] signVal) {

        element =
                doc.createElementNS(WSConstants.WSSE11_NS,
                        WSConstants.WSSE11_PREFIX
                + ":"
                + WSConstants.SIGNATURE_CONFIRMATION_LN);
        WSSecurityUtil.setNamespace(element,
                WSConstants.WSSE11_NS,
                WSConstants.WSSE11_PREFIX);
        if (signVal != null) {
            String sv = Base64.encode(signVal);
            element.setAttribute(VALUE, sv);
        }

    }

    /**
     * Returns the dom element of this <code>Timestamp</code> object.
     *
     * @return the <code>wsse:UsernameToken</code> element
     */
    public Element getElement() {
        return this.element;
    }

    /**
     * Returns the string representation of the token.
     *
     * @return a XML string representation
     */
    public String toString() {
        return DOM2Writer.nodeToString((Node) this.element);
    }
    
    /**
     * Set wsu:Id attribute of this SignatureConfirmation element.
     * @param id
     */
    public void setID(String id) {
        String prefix = WSSecurityUtil.setNamespace(this.element,
                WSConstants.WSU_NS, WSConstants.WSU_PREFIX);
        this.element.setAttributeNS(WSConstants.WSU_NS, prefix + ":Id", id);
    }
    
    /**
     * Returns the value of the wsu:Id attribute
     * @return TODO
     */
    public String getID() {
        return this.element.getAttributeNS(WSConstants.WSU_NS, "Id");
    }

    /**
     * @return Returns the signatureValue.
     */
    public byte[] getSignatureValue() {
        return signatureValue;
    }
    
}