001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    
018    package org.apache.activemq.jaas;
019    
020    import java.io.IOException;
021    import java.security.cert.X509Certificate;
022    
023    import javax.security.auth.callback.Callback;
024    import javax.security.auth.callback.CallbackHandler;
025    import javax.security.auth.callback.UnsupportedCallbackException;
026    
027    /**
028     * A Standard JAAS callback handler for SSL certificate requests. Will only
029     * handle callbacks of type CertificateCallback.
030     * 
031     * @author sepandm@gmail.com (Sepand)
032     */
033    public class JaasCertificateCallbackHandler implements CallbackHandler {
034        final X509Certificate certificates[];
035    
036        /**
037         * Basic constructor.
038         * 
039         * @param cert The certificate returned when calling back.
040         */
041        public JaasCertificateCallbackHandler(X509Certificate certs[]) {
042            certificates = certs;
043        }
044    
045        /**
046         * Overriding handle method to handle certificates.
047         * 
048         * @param callbacks The callbacks requested.
049         * @throws IOException
050         * @throws UnsupportedCallbackException Thrown if an unkown Callback type is
051         *                 encountered.
052         */
053        public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
054            for (int i = 0; i < callbacks.length; i++) {
055                Callback callback = callbacks[i];
056                if (callback instanceof CertificateCallback) {
057                    CertificateCallback certCallback = (CertificateCallback)callback;
058    
059                    certCallback.setCertificates(certificates);
060    
061                } else {
062                    throw new UnsupportedCallbackException(callback);
063                }
064            }
065        }
066    }