    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}