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    package org.apache.geronimo.security.realm.providers;
018    
019    import java.io.IOException;
020    import java.security.cert.X509Certificate;
021    import javax.security.auth.callback.Callback;
022    import javax.security.auth.callback.UnsupportedCallbackException;
023    
024    /**
025     * @version $Rev: 706640 $ $Date: 2008-10-21 14:44:05 +0000 (Tue, 21 Oct 2008) $
026     */
027    public class CertificateCallbackHandler implements ClearableCallbackHandler {
028        X509Certificate certificate;
029        public CertificateCallbackHandler(X509Certificate certificate) {
030            this.certificate = certificate;
031        }
032    
033        public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
034            for (int i = 0; i < callbacks.length; i++) {
035                Callback callback = callbacks[i];
036                if (callback instanceof CertificateCallback) {
037                    CertificateCallback cc = (CertificateCallback) callback;
038                    cc.setCertificate(certificate);
039                } else {
040                    throw new UnsupportedCallbackException(callback);
041                }
042            }
043        }
044    
045        public void clear() {
046            certificate = null;
047        }
048    }