/**
 * 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.cxf.ws.security.policy.interceptors;

import java.util.Arrays;
import java.util.Map;

import org.apache.cxf.binding.soap.Soap11;
import org.apache.cxf.binding.soap.SoapMessage;
import org.apache.cxf.message.Message;
import org.apache.cxf.ws.policy.AbstractPolicyInterceptorProvider;
import org.apache.cxf.ws.policy.AssertionInfoMap;
import org.apache.cxf.ws.security.SecurityConstants;
import org.apache.cxf.ws.security.trust.STSClient;
import org.apache.neethi.All;
import org.apache.neethi.ExactlyOne;
import org.apache.neethi.Policy;
import org.apache.wss4j.dom.engine.WSSConfig;
import org.apache.wss4j.policy.SP11Constants;
import org.apache.wss4j.policy.SP12Constants;
import org.apache.wss4j.policy.model.AlgorithmSuite;

/**
 * 
 */
public class SpnegoTokenInterceptorProvider extends AbstractPolicyInterceptorProvider {

    private static final long serialVersionUID = -3412111025613191505L;

    public SpnegoTokenInterceptorProvider() {
        super(Arrays.asList(SP11Constants.SPNEGO_CONTEXT_TOKEN, SP12Constants.SPNEGO_CONTEXT_TOKEN));
        this.getOutInterceptors().add(new SpnegoContextTokenOutInterceptor());
        this.getOutFaultInterceptors().add(new SpnegoContextTokenOutInterceptor());
        this.getInInterceptors().add(new SpnegoContextTokenInInterceptor());
        this.getInFaultInterceptors().add(new SpnegoContextTokenInInterceptor());
    }
    
    static String setupClient(STSClient client, SoapMessage message, AssertionInfoMap aim) {
        client.setTrust(NegotiationUtils.getTrust10(aim));
        client.setTrust(NegotiationUtils.getTrust13(aim));
        
        Policy p = new Policy();
        ExactlyOne ea = new ExactlyOne();
        p.addPolicyComponent(ea);
        All all = new All();
        all.addPolicyComponent(NegotiationUtils.getAddressingPolicy(aim, false));
        ea.addPolicyComponent(all);
        
        client.setPolicy(p);
        client.setSoap11(message.getVersion() == Soap11.getInstance());
        client.setSpnego(true);
        
        WSSConfig config = WSSConfig.getNewInstance();
        String context = config.getIdAllocator().createSecureId("_", null);
        client.setContext(context);
        
        String s = message.getContextualProperty(Message.ENDPOINT_ADDRESS).toString();
        client.setLocation(s);
        AlgorithmSuite suite = NegotiationUtils.getAlgorithmSuite(aim);
        if (suite != null) {
            client.setAlgorithmSuite(suite);
            int x = suite.getAlgorithmSuiteType().getMaximumSymmetricKeyLength();
            if (x < 256) {
                client.setKeySize(x);
            }
        }
        
        Map<String, Object> ctx = client.getRequestContext();
        mapSecurityProps(message, ctx);
        
        return s;
    }
    
    private static void mapSecurityProps(Message message, Map<String, Object> ctx) {
        for (String s : SecurityConstants.ALL_PROPERTIES) {
            Object v = message.getContextualProperty(s);
            if (v != null) {
                ctx.put(s, v);
            }
        }
    }
    

}
