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 java.security.cert.Certificate;
022    import javax.security.auth.callback.Callback;
023    import javax.security.auth.callback.UnsupportedCallbackException;
024    import javax.security.auth.callback.CallbackHandler;
025    
026    /**
027     * @version $Rev: 355877 $ $Date: 2005-12-10 18:48:27 -0800 (Sat, 10 Dec 2005) $
028     */
029    public class CertificateChainCallbackHandler implements CallbackHandler {
030        Certificate[] certificateChain;
031    
032        public CertificateChainCallbackHandler(Certificate[] certificateChain) {
033            this.certificateChain = certificateChain;
034        }
035    
036        public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
037            for (int i = 0; i < callbacks.length; i++) {
038                Callback callback = callbacks[i];
039                if (callback instanceof CertificateChainCallback) {
040                    CertificateChainCallback cc = (CertificateChainCallback) callback;
041                    cc.setCertificateChain(certificateChain);
042                } else if (callback instanceof CertificateCallback
043                        && certificateChain != null
044                        && certificateChain.length > 0
045                        && certificateChain[0] instanceof X509Certificate) {
046                    CertificateCallback cc = (CertificateCallback) callback;
047                    cc.setCertificate((X509Certificate) certificateChain[0]);
048                } else {
049                    throw new UnsupportedCallbackException(callback);
050                }
051            }
052        }
053    
054    }