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