/*

 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

// SunJSSE does not support dynamic system properties, no way to re-use

// system properties in samevm/agentvm mode.

/*

 * @test

 * @bug 8148108

 * @summary Disable Diffie-Hellman keys less than 1024 bits

 * @run main/othervm -Djdk.tls.ephemeralDHKeySize=legacy LegacyDHEKeyExchange

 */

import java.io.*;

import javax.net.ssl.*;

public class LegacyDHEKeyExchange {

    /*

     * =============================================================

     * Set the various variables needed for the tests, then

     * specify what tests to run on each side.

     */

    /*

     * Should we run the client or server in a separate thread?

     * Both sides can throw exceptions, but do you have a preference

     * as to which side should be the main thread.

     */

    static boolean separateServerThread = false;

    /*

     * Where do we find the keystores?

     */

    static String pathToStores = "../../../../javax/net/ssl/etc";

    static String keyStoreFile = "keystore";

    static String trustStoreFile = "truststore";

    static String passwd = "passphrase";

    /*

     * Is the server ready to serve?

     */

    volatile static boolean serverReady = false;

    /*

     * Turn on SSL debugging?

     */

    static boolean debug = false;

    /*

     * If the client or server is doing some kind of object creation

     * that the other side depends on, and that thread prematurely

     * exits, you may experience a hang.  The test harness will

     * terminate all hung threads after its timeout has expired,

     * currently 3 minutes by default, but you might try to be

     * smart about it....

     */

    /*

     * Define the server side of the test.

     *

     * If the server prematurely exits, serverReady will be set to true

     * to avoid infinite hangs.

     */

    void doServerSide() throws Exception {

        SSLServerSocketFactory sslssf =

            (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();

        SSLServerSocket sslServerSocket =

            (SSLServerSocket) sslssf.createServerSocket(serverPort);

        serverPort = sslServerSocket.getLocalPort();

        /*

         * Signal Client, we're ready for his connect.

         */

        serverReady = true;

        try (SSLSocket sslSocket = (SSLSocket)sslServerSocket.accept()) {

            InputStream sslIS = sslSocket.getInputStream();

            OutputStream sslOS = sslSocket.getOutputStream();

            sslIS.read();

            sslOS.write(85);

            sslOS.flush();

            throw new Exception(

                "Leagcy DH keys (< 1024) should be restricted");

        } catch (SSLHandshakeException she) {

            // ignore, client should terminate the connection

        } finally {

            sslServerSocket.close();

        }

    }

    /*

     * Define the client side of the test.

     *

     * If the server prematurely exits, serverReady will be set to true

     * to avoid infinite hangs.

     */

    void doClientSide() throws Exception {

        /*

         * Wait for server to get started.

         */

        while (!serverReady) {

            Thread.sleep(50);

        }

        SSLSocketFactory sslsf =

            (SSLSocketFactory) SSLSocketFactory.getDefault();

        SSLSocket sslSocket = (SSLSocket)

            sslsf.createSocket("localhost", serverPort);

        String[] suites = new String [] {"TLS_DHE_RSA_WITH_AES_128_CBC_SHA"};

        sslSocket.setEnabledCipherSuites(suites);

        try {

            InputStream sslIS = sslSocket.getInputStream();

            OutputStream sslOS = sslSocket.getOutputStream();

            sslOS.write(280);

            sslOS.flush();

            sslIS.read();

            throw new Exception("Leagcy DH keys (< 1024) should be restricted");

        } catch (SSLHandshakeException she) {

            // ignore, should be caused by algorithm constraints

        } finally {

            sslSocket.close();

        }

    }

    /*

     * =============================================================

     * The remainder is just support stuff

     */

    // use any free port by default

    volatile int serverPort = 0;

    volatile Exception serverException = null;

    volatile Exception clientException = null;

    public static void main(String[] args) throws Exception {

        String keyFilename =

            System.getProperty("test.src", ".") + "/" + pathToStores +

                "/" + keyStoreFile;

        String trustFilename =

            System.getProperty("test.src", ".") + "/" + pathToStores +

                "/" + trustStoreFile;

        System.setProperty("javax.net.ssl.keyStore", keyFilename);

        System.setProperty("javax.net.ssl.keyStorePassword", passwd);

        System.setProperty("javax.net.ssl.trustStore", trustFilename);

        System.setProperty("javax.net.ssl.trustStorePassword", passwd);

        if (debug) {

            System.setProperty("javax.net.debug", "all");

        }

        /*

         * Start the tests.

         */

        new LegacyDHEKeyExchange();

    }

    Thread clientThread = null;

    Thread serverThread = null;

    /*

     * Primary constructor, used to drive remainder of the test.

     *

     * Fork off the other side, then do your work.

     */

    LegacyDHEKeyExchange() throws Exception {

        Exception startException = null;

        try {

            if (separateServerThread) {

                startServer(true);

                startClient(false);

            } else {

                startClient(true);

                startServer(false);

            }

        } catch (Exception e) {

            startException = e;

        }

        /*

         * Wait for other side to close down.

         */

        if (separateServerThread) {

            if (serverThread != null) {

                serverThread.join();

            }

        } else {

            if (clientThread != null) {

                clientThread.join();

            }

        }

        /*

         * When we get here, the test is pretty much over.

         * Which side threw the error?

         */

        Exception local;

        Exception remote;

        if (separateServerThread) {

            remote = serverException;

            local = clientException;

        } else {

            remote = clientException;

            local = serverException;

        }

        Exception exception = null;

        /*

         * Check various exception conditions.

         */

        if ((local != null) && (remote != null)) {

            // If both failed, return the curthread's exception.

            local.initCause(remote);

            exception = local;

        } else if (local != null) {

            exception = local;

        } else if (remote != null) {

            exception = remote;

        } else if (startException != null) {

            exception = startException;

        }

        /*

         * If there was an exception *AND* a startException,

         * output it.

         */

        if (exception != null) {

            if (exception != startException && startException != null) {

                exception.addSuppressed(startException);

            }

            throw exception;

        }

        // Fall-through: no exception to throw!

    }

    void startServer(boolean newThread) throws Exception {

        if (newThread) {

            serverThread = new Thread() {

                @Override

                public void run() {

                    try {

                        doServerSide();

                    } catch (Exception e) {

                        /*

                         * Our server thread just died.

                         *

                         * Release the client, if not active already...

                         */

                        System.err.println("Server died...");

                        serverReady = true;

                        serverException = e;

                    }

                }

            };

            serverThread.start();

        } else {

            try {

                doServerSide();

            } catch (Exception e) {

                serverException = e;

            } finally {

                serverReady = true;

            }

        }

    }

    void startClient(boolean newThread) throws Exception {

        if (newThread) {

            clientThread = new Thread() {

                @Override

                public void run() {

                    try {

                        doClientSide();

                    } catch (Exception e) {

                        /*

                         * Our client thread just died.

                         */

                        System.err.println("Client died...");

                        clientException = e;

                    }

                }

            };

            clientThread.start();

        } else {

            try {

                doClientSide();

            } catch (Exception e) {

                clientException = e;

            }

        }

    }

}