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    
019    package org.apache.commons.net.util;
020    
021    import java.io.IOException;
022    import java.security.GeneralSecurityException;
023    import javax.net.ssl.KeyManager;
024    import javax.net.ssl.SSLContext;
025    import javax.net.ssl.TrustManager;
026    
027    /**
028     * General utilities for SSLContext.
029     * @since 3.0
030     */
031    public class SSLContextUtils {
032    
033        private SSLContextUtils() {
034            // Not instantiable
035        }
036    
037        /**
038         * Create and initialise sn SSLContext.
039         * @param protocol the protocol used to instatiate the context
040         * @param keyManager the key manager, may be {@code null}
041         * @param trustManager the trust manager, may be {@code null}
042         * @return the initialised context.
043         * @throws IOException this is used to wrap any {@link GeneralSecurityException} that occurs
044         */
045        public static SSLContext createSSLContext(String protocol, KeyManager keyManager, TrustManager trustManager) throws IOException {
046            return createSSLContext(protocol,
047                    keyManager == null ? null : new KeyManager[] { keyManager },
048                    trustManager == null ? null : new TrustManager[] { trustManager });
049        }
050    
051        /**
052         * Create and initialise sn SSLContext.
053         * @param protocol the protocol used to instatiate the context
054         * @param keyManagers the array of key managers, may be {@code null} but array entries must not be {@code null}
055         * @param trustManagers the array of trust managers, may be {@code null} but array entries must not be {@code null}
056         * @return the initialised context.
057         * @throws IOException this is used to wrap any {@link GeneralSecurityException} that occurs
058         */
059        public static SSLContext createSSLContext(String protocol, KeyManager[] keyManagers, TrustManager[] trustManagers)
060            throws IOException {
061            SSLContext ctx;
062            try {
063                ctx = SSLContext.getInstance(protocol);
064                ctx.init(keyManagers, trustManagers, /*SecureRandom*/ null);
065            } catch (GeneralSecurityException e) {
066                IOException ioe = new IOException("Could not initialize SSL context");
067                ioe.initCause(e);
068                throw ioe;
069            }
070            return ctx;
071        }
072    }