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Apache WSS4J is an implementation of the Web Services Security (WS-Security) being developed at OASIS Web Services Security TC. WSS4J is a primarily a Java library that can be used to sign and verify SOAP Messages with WS-Security information. WSS4J will use Apache Axis and Apache XML-Security projects and will be interoperable with JAX-RPC based server/clients and .NET server/clients.

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.action;

import javax.security.auth.callback.CallbackHandler;

import org.apache.ws.security.WSPasswordCallback;
import org.apache.ws.security.WSSecurityException;
import org.apache.ws.security.handler.RequestData;
import org.apache.ws.security.handler.WSHandler;
import org.apache.ws.security.message.WSSecSignature;
import org.w3c.dom.Document;

public class SignatureAction implements Action {
    public void execute(WSHandler handler, int actionToDo, Document doc, RequestData reqData)
            throws WSSecurityException {
        CallbackHandler callbackHandler = 
            handler.getPasswordCallbackHandler(reqData);
        WSPasswordCallback passwordCallback = 
            handler.getPasswordCB(reqData.getSignatureUser(), actionToDo, callbackHandler, reqData);
        WSSecSignature wsSign = new WSSecSignature(reqData.getWssConfig());

        if (reqData.getSigKeyId() != 0) {
            wsSign.setKeyIdentifierType(reqData.getSigKeyId());
        }
        if (reqData.getSigAlgorithm() != null) {
            wsSign.setSignatureAlgorithm(reqData.getSigAlgorithm());
        }
        if (reqData.getSigDigestAlgorithm() != null) {
            wsSign.setDigestAlgo(reqData.getSigDigestAlgorithm());
        }

        wsSign.setUserInfo(reqData.getSignatureUser(), passwordCallback.getPassword());
        wsSign.setUseSingleCertificate(reqData.isUseSingleCert());
        if (reqData.getSignatureParts().size() > 0) {
            wsSign.setParts(reqData.getSignatureParts());
        }
        
        if (passwordCallback.getKey() != null) {
            wsSign.setSecretKey(passwordCallback.getKey());
        }

        try {
            wsSign.build(doc, reqData.getSigCrypto(), reqData.getSecHeader());
            reqData.getSignatureValues().add(wsSign.getSignatureValue());
        } catch (WSSecurityException e) {
            throw new WSSecurityException("Error during Signature: ", e);
        }
    }

}