001    /**
002     *
003     * Copyright 2005 The Apache Software Foundation
004     *
005     *  Licensed under the Apache License, Version 2.0 (the "License");
006     *  you may not use this file except in compliance with the License.
007     *  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: 355877 $ $Date: 2005-12-10 18:48:27 -0800 (Sat, 10 Dec 2005) $
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    }