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
019package org.apache.commons.net.util;
020
021import java.io.IOException;
022import java.security.GeneralSecurityException;
023import javax.net.ssl.KeyManager;
024import javax.net.ssl.SSLContext;
025import javax.net.ssl.TrustManager;
026
027/**
028 * General utilities for SSLContext.
029 * @since 3.0
030 */
031public class SSLContextUtils {
032
033    private SSLContextUtils() {
034        // Not instantiable
035    }
036
037    /**
038     * Create and initialise an 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)
046            throws IOException {
047        return createSSLContext(protocol,
048                keyManager == null ? null : new KeyManager[] { keyManager },
049                trustManager == null ? null : new TrustManager[] { trustManager });
050    }
051
052    /**
053     * Create and initialise an SSLContext.
054     * @param protocol the protocol used to instatiate the context
055     * @param keyManagers the array of key managers, may be {@code null} but array entries must not be {@code null}
056     * @param trustManagers the array of trust managers, may be {@code null} but array entries must not be {@code null}
057     * @return the initialised context.
058     * @throws IOException this is used to wrap any {@link GeneralSecurityException} that occurs
059     */
060    public static SSLContext createSSLContext(String protocol, KeyManager[] keyManagers, TrustManager[] trustManagers)
061        throws IOException {
062        SSLContext ctx;
063        try {
064            ctx = SSLContext.getInstance(protocol);
065            ctx.init(keyManagers, trustManagers, /*SecureRandom*/ null);
066        } catch (GeneralSecurityException e) {
067            IOException ioe = new IOException("Could not initialize SSL context");
068            ioe.initCause(e);
069            throw ioe;
070        }
071        return ctx;
072    }
073}