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;
023
024import javax.net.ssl.KeyManager;
025import javax.net.ssl.SSLContext;
026import javax.net.ssl.TrustManager;
027
028/**
029 * General utilities for SSLContext.
030 *
031 * @since 3.0
032 */
033public class SSLContextUtils {
034
035    /**
036     * Create and initialize an SSLContext.
037     *
038     * @param protocol     the protocol used to instatiate the context
039     * @param keyManager   the key manager, may be {@code null}
040     * @param trustManager the trust manager, may be {@code null}
041     * @return the initialized context.
042     * @throws IOException this is used to wrap any {@link GeneralSecurityException} that occurs
043     */
044    public static SSLContext createSSLContext(final String protocol, final KeyManager keyManager, final TrustManager trustManager) throws IOException {
045        return createSSLContext(protocol, keyManager == null ? null : new KeyManager[] { keyManager },
046                trustManager == null ? null : new TrustManager[] { trustManager });
047    }
048
049    /**
050     * Create and initialize an SSLContext.
051     *
052     * @param protocol      the protocol used to instatiate the context
053     * @param keyManagers   the array of key managers, may be {@code null} but array entries must not be {@code null}
054     * @param trustManagers the array of trust managers, may be {@code null} but array entries must not be {@code null}
055     * @return the initialized context.
056     * @throws IOException this is used to wrap any {@link GeneralSecurityException} that occurs
057     */
058    public static SSLContext createSSLContext(final String protocol, final KeyManager[] keyManagers, final TrustManager[] trustManagers) throws IOException {
059        final SSLContext ctx;
060        try {
061            ctx = SSLContext.getInstance(protocol);
062            ctx.init(keyManagers, trustManagers, /* SecureRandom */ null);
063        } catch (final GeneralSecurityException e) {
064            final IOException ioe = new IOException("Could not initialize SSL context");
065            ioe.initCause(e);
066            throw ioe;
067        }
068        return ctx;
069    }
070
071    private SSLContextUtils() {
072        // Not instantiable
073    }
074}