/*
 * Copyright (c) 2005, 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.
 */

/*
 * @test
 * @bug 4836493
 * @summary Socket timeouts for SSLSockets causes data corruption.
 */

import java.io.*;
import java.net.*;
import java.util.*;
import java.security.*;
import javax.net.ssl.*;

public class ClientTimeout {

    /*
     * =============================================================
     * 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;

    /*
     * Where do we find the keystores?
     */
    static String pathToStores = "/../../../../../../../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;


    /*
     * define the rhythm of timeout exception
     */
    static boolean rhythm = true;

    /*
     * 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;

        SSLSocket sslSocket = (SSLSocket) sslServerSocket.accept();
        InputStream sslIS = sslSocket.getInputStream();
        OutputStream sslOS = sslSocket.getOutputStream();
        sslSocket.startHandshake();

        // transfer a file to client.
        String transFilename =
            System.getProperty("test.src", "./") + "/" +
                        this.getClass().getName() + ".java";
        MessageDigest md = MessageDigest.getInstance("SHA");
        DigestInputStream transIns = new DigestInputStream(
                new FileInputStream(transFilename), md);

        byte[] bytes = new byte[2000];
        int i = 0;
        while (true) {
            // reset the cycle
            if (i >= bytes.length) {
                i = 0;
            }

            int length = 0;
            if ((length = transIns.read(bytes, 0, i++)) == -1) {
                break;
            } else {
                sslOS.write(bytes, 0, length);
                sslOS.flush();

                if (i % 3 == 0) {
                    Thread.sleep(300);  // Stall past the timeout...
                }
            }
        }
        serverDigest = md.digest();
        transIns.close();
        sslSocket.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 {
        boolean caught = false;

        /*
         * Wait for server to get started.
         */
        while (!serverReady) {
            Thread.sleep(50);
        }

        Socket baseSocket = new Socket("localhost", serverPort) {
            MyInputStream ins = null;

            public InputStream getInputStream() throws IOException {
                if (ins != null) {
                    return ins;
                } else {
                    ins = new MyInputStream(super.getInputStream());
                    return ins;
                }
            }
        };

        SSLSocketFactory sslsf =
            (SSLSocketFactory) SSLSocketFactory.getDefault();
        SSLSocket sslSocket = (SSLSocket)
            sslsf.createSocket(baseSocket, "localhost", serverPort, true);

        InputStream sslIS = sslSocket.getInputStream();
        OutputStream sslOS = sslSocket.getOutputStream();

        // handshaking
        sslSocket.setSoTimeout(100); // The stall timeout.
        while (true) {
            try {
                rhythm = true;
                sslSocket.startHandshake();
                break;
            } catch (SocketTimeoutException e) {
                System.out.println("Handshaker exception: "
                        + e.getMessage());
            }
        }

        // read application data from server
        MessageDigest md = MessageDigest.getInstance("SHA");
        DigestInputStream transIns = new DigestInputStream(sslIS, md);
        byte[] bytes = new byte[2000];
        while (true) {
            try {
                rhythm = true;

                while (transIns.read(bytes, 0, 17) != -1) {
                    rhythm = true;
                }
                break;
            } catch (SocketTimeoutException e) {
                System.out.println("InputStream Exception: "
                        + e.getMessage());
            }
        }
        // Wait for server to get ready.
        while (serverDigest == null) {
            Thread.sleep(20);
        }

        byte[] cliDigest = md.digest();
        if (!Arrays.equals(cliDigest, serverDigest)) {
            throw new Exception("Application data trans error");
        }

        transIns.close();
        sslSocket.close();
    }

    /*
     * =============================================================
     * The remainder is just support stuff
     */

    static class MyInputStream extends InputStream {
        InputStream ins = null;

        public MyInputStream(InputStream ins) {
            this.ins = ins;
        }

        public int read() throws IOException {
            return read(new byte[1], 0, 1);
        }

        public int read(byte[] data, int offset, int len) throws IOException {
            if (!ClientTimeout.rhythm) {
                throw new SocketTimeoutException(
                        "Throwing a timeout exception");
            }
            ClientTimeout.rhythm = false;
            return ins.read(data, offset, len);
        }
    }

    // use any free port by default
    volatile int serverPort = 0;

    volatile Exception serverException = null;
    volatile Exception clientException = null;

    volatile byte[] serverDigest = 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 ClientTimeout();
    }

    Thread clientThread = null;
    Thread serverThread = null;

    /*
     * Primary constructor, used to drive remainder of the test.
     *
     * Fork off the other side, then do your work.
     */
    ClientTimeout() 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();
        }
    }
}