/*

 * Copyright (c) 2012, 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 7068321

 * @summary Support TLS Server Name Indication (SNI) Extension in JSSE Server

 * @build SSLEngineService SSLCapabilities SSLExplorer

 * @run main/othervm SSLEngineExplorerWithCli

 */

import javax.net.ssl.*;

import java.nio.*;

import java.net.*;

import java.util.*;

import java.nio.channels.*;

public class SSLEngineExplorerWithCli extends SSLEngineService {

    /*

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

     * 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 = true;

    // Is the server ready to serve?

    volatile static boolean serverReady = false;

    /*

     * Turn on SSL debugging?

     */

    static boolean debug = false;

    /*

     * 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 {

        // create SSLEngine.

        SSLEngine ssle = createSSLEngine(false);

        // Create a server socket channel.

        InetSocketAddress isa =

                new InetSocketAddress(InetAddress.getLocalHost(), serverPort);

        ServerSocketChannel ssc = ServerSocketChannel.open();

        ssc.socket().bind(isa);

        serverPort = ssc.socket().getLocalPort();

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

        serverReady = true;

        // Accept a socket channel.

        SocketChannel sc = ssc.accept();

        // Complete connection.

        while (!sc.finishConnect()) {

            Thread.sleep(50);

            // waiting for the connection completed.

        }

        ByteBuffer buffer = ByteBuffer.allocate(0xFF);

        int position = 0;

        SSLCapabilities capabilities = null;

        // Read the header of TLS record

        buffer.limit(SSLExplorer.RECORD_HEADER_SIZE);

        while (position < SSLExplorer.RECORD_HEADER_SIZE) {

            int n = sc.read(buffer);

            if (n < 0) {

                throw new Exception("unexpected end of stream!");

            }

            position += n;

        }

        buffer.flip();

        int recordLength = SSLExplorer.getRequiredSize(buffer);

        if (buffer.capacity() < recordLength) {

            ByteBuffer oldBuffer = buffer;

            buffer = ByteBuffer.allocate(recordLength);

            buffer.put(oldBuffer);

        }

        buffer.position(SSLExplorer.RECORD_HEADER_SIZE);

        buffer.limit(buffer.capacity());

        while (position < recordLength) {

            int n = sc.read(buffer);

            if (n < 0) {

                throw new Exception("unexpected end of stream!");

            }

            position += n;

        }

        buffer.flip();

        capabilities = SSLExplorer.explore(buffer);

        if (capabilities != null) {

            System.out.println("Record version: " +

                    capabilities.getRecordVersion());

            System.out.println("Hello version: " +

                    capabilities.getHelloVersion());

        }

        // handshaking

        handshaking(ssle, sc, buffer);

        // receive application data

        receive(ssle, sc);

        // send out application data

        deliver(ssle, sc);

        ExtendedSSLSession session = (ExtendedSSLSession)ssle.getSession();

        checkCapabilities(capabilities, session);

        // close the socket channel.

        sc.close();

        ssc.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 {

        // create SSLEngine.

        SSLEngine ssle = createSSLEngine(true);

        /*

         * Wait for server to get started.

         */

        while (!serverReady) {

            Thread.sleep(50);

        }

        // Create a non-blocking socket channel.

        SocketChannel sc = SocketChannel.open();

        sc.configureBlocking(false);

        InetSocketAddress isa =

                new InetSocketAddress(InetAddress.getLocalHost(), serverPort);

        sc.connect(isa);

        // Complete connection.

        while (!sc.finishConnect() ) {

            Thread.sleep(50);

            // waiting for the connection completed.

        }

        SNIHostName serverName = new SNIHostName(clientRequestedHostname);

        List<SNIServerName> serverNames = new ArrayList<>(1);

        serverNames.add(serverName);

        SSLParameters params = ssle.getSSLParameters();

        params.setServerNames(serverNames);

        ssle.setSSLParameters(params);

        // handshaking

        handshaking(ssle, sc, null);

        // send out application data

        deliver(ssle, sc);

        // receive application data

        receive(ssle, sc);

        // check server name indication

        ExtendedSSLSession session = (ExtendedSSLSession)ssle.getSession();

        checkSNIInSession(session);

        // close the socket channel.

        sc.close();

    }

    private static String clientRequestedHostname = "www.example.com";

    private static String serverAcceptableHostname =

                                                "www\\.example\\.(com|org)";

    void checkCapabilities(SSLCapabilities capabilities,

            ExtendedSSLSession session) throws Exception {

        List<SNIServerName> sessionSNI = session.getRequestedServerNames();

        if (!sessionSNI.equals(capabilities.getServerNames())) {

            for (SNIServerName sni : sessionSNI) {

                System.out.println("SNI in session is " + sni);

            }

            List<SNIServerName> capaSNI = capabilities.getServerNames();

            for (SNIServerName sni : capaSNI) {

                System.out.println("SNI in session is " + sni);

            }

            throw new Exception(

                    "server name indication does not match capabilities");

        }

        checkSNIInSession(session);

    }

    void checkSNIInSession(ExtendedSSLSession session) throws Exception {

        List<SNIServerName> sessionSNI = session.getRequestedServerNames();

        if (sessionSNI.isEmpty()) {

            throw new Exception(

                    "unexpected empty request server name indication");

        }

        if (sessionSNI.size() != 1) {

            throw new Exception(

                    "unexpected request server name indication");

        }

        SNIServerName serverName = sessionSNI.get(0);

        if (!(serverName instanceof SNIHostName)) {

            throw new Exception(

                    "unexpected instance of request server name indication");

        }

        String hostname = ((SNIHostName)serverName).getAsciiName();

        if (!clientRequestedHostname.equalsIgnoreCase(hostname)) {

            throw new Exception(

                    "unexpected request server name indication value");

        }

    }

    /*

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

     * The remainder is just support stuff

     */

    volatile Exception serverException = null;

    volatile Exception clientException = null;

    // use any free port by default

    volatile int serverPort = 0;

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

        if (debug)

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

        new SSLEngineExplorerWithCli();

    }

    Thread clientThread = null;

    Thread serverThread = null;

    /*

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

     *

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

     */

    SSLEngineExplorerWithCli() throws Exception {

        if (separateServerThread) {

            startServer(true);

            startClient(false);

        } else {

            startClient(true);

            startServer(false);

        }

        /*

         * Wait for other side to close down.

         */

        if (separateServerThread) {

            serverThread.join();

        } else {

            clientThread.join();

        }

        /*

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

         *

         * If the main thread excepted, that propagates back

         * immediately.  If the other thread threw an exception, we

         * should report back.

         */

        if (serverException != null) {

            System.out.print("Server Exception:");

            throw serverException;

        }

        if (clientException != null) {

            System.out.print("Client Exception:");

            throw clientException;

        }

    }

    void startServer(boolean newThread) throws Exception {

        if (newThread) {

            serverThread = new Thread() {

                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...");

                        System.err.println(e);

                        serverReady = true;

                        serverException = e;

                    }

                }

            };

            serverThread.start();

        } else {

            doServerSide();

        }

    }

    void startClient(boolean newThread) throws Exception {

        if (newThread) {

            clientThread = new Thread() {

                public void run() {

                    try {

                        doClientSide();

                    } catch (Exception e) {

                        /*

                         * Our client thread just died.

                         */

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

                        clientException = e;

                    }

                }

            };

            clientThread.start();

        } else {

            doClientSide();

        }

    }

}