/*

 * Copyright (c) 2001, 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 4366807

 * @summary Need new APIs to get/set session timeout and session cache size.

 * @run main/othervm SessionCacheSizeTests

 */

import java.io.*;

import java.net.*;

import javax.net.ssl.*;

import java.util.*;

import java.security.*;

/**

 * Session cache size tests cover the following cases:

 * 1. Effect of system property javax.net.ssl.SessionCacheSize (this

 * property is not documented for public).

 * 2. Reducing the cache size, results in uncaching of sessions if #of

 * sessions present exceeds the new size.

 * 3. Increasing the cache size, results in accomodating  new sessions if the

 * number of cached sessions is the current size limit.

 *

 * Invairant for passing this test is, at any given time,

 * #cached_sessions <= current_cache_size , for current_cache_size > 0

 */

public class SessionCacheSizeTests {

    /*

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

     * 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;

    /*

     * 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.

     */

    /*

     * A limit on the number of connections at any given time

     */

    static int MAX_ACTIVE_CONNECTIONS = 4;

    void doServerSide(int serverPort, int serverConns) throws Exception {

        try (SSLServerSocket sslServerSocket =

                (SSLServerSocket) sslssf.createServerSocket(serverPort)) {

            // timeout to accept a connection

            sslServerSocket.setSoTimeout(45000);

            // make sure createdPorts++ is atomic

            synchronized(serverPorts) {

                serverPorts[createdPorts++] = sslServerSocket.getLocalPort();

                /*

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

                 */

                if (createdPorts == serverPorts.length) {

                    serverReady = true;

                }

            }

            int read = 0;

            int nConnections = 0;

            /*

             * Divide the max connections among the available server ports.

             * The use of more than one server port ensures creation of more

             * than one session.

             */

            SSLSession sessions [] = new SSLSession [serverConns];

            SSLSessionContext sessCtx = sslctx.getServerSessionContext();

            while (nConnections < serverConns) {

                try (SSLSocket sslSocket =

                        (SSLSocket)sslServerSocket.accept()) {

                    sslSocket.setSoTimeout(90000);      // timeout to read

                    InputStream sslIS = sslSocket.getInputStream();

                    OutputStream sslOS = sslSocket.getOutputStream();

                    read = sslIS.read();

                    sessions[nConnections] = sslSocket.getSession();

                    sslOS.write(85);

                    sslOS.flush();

                    nConnections++;

                }

            }

        }

    }

    /*

     * 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);

        }

        int nConnections = 0;

        SSLSocket sslSockets[] = new SSLSocket [MAX_ACTIVE_CONNECTIONS];

        Vector sessions = new Vector();

        SSLSessionContext sessCtx = sslctx.getClientSessionContext();

        sessCtx.setSessionTimeout(0); // no limit

        while (nConnections < (MAX_ACTIVE_CONNECTIONS - 1)) {

            // divide the connections among the available server ports

            sslSockets[nConnections] = (SSLSocket) sslsf.

                        createSocket("localhost",

                        serverPorts [nConnections % (serverPorts.length)]);

            InputStream sslIS = sslSockets[nConnections].getInputStream();

            OutputStream sslOS = sslSockets[nConnections].getOutputStream();

            sslOS.write(237);

            sslOS.flush();

            int read = sslIS.read();

            SSLSession sess = sslSockets[nConnections].getSession();

            if (!sessions.contains(sess))

                sessions.add(sess);

            nConnections++;

        }

        System.out.println("Current cacheSize is set to: " +

                                 sessCtx.getSessionCacheSize());

        System.out.println();

        System.out.println("Currently cached Sessions......");

        System.out.println("============================================"

                                + "============================");

        System.out.println("Session                                     "

                                + "      Session-last-accessTime");

        System.out.println("============================================"

                                + "============================");

        checkCachedSessions(sessCtx, nConnections);

        // Change session cache size

        sessCtx.setSessionCacheSize(2);

        System.out.println("Session cache size changed to: "

                        + sessCtx.getSessionCacheSize());

        System.out.println();

        checkCachedSessions(sessCtx, nConnections);

        // Test the effect of increasing the cache size

        sessCtx.setSessionCacheSize(3);

        System.out.println("Session cache size changed to: "

                        + sessCtx.getSessionCacheSize());

        // create a new session

        sslSockets[nConnections] = (SSLSocket) sslsf.

                        createSocket("localhost",

                        serverPorts [nConnections % (serverPorts.length)]);

        InputStream sslIS = sslSockets[nConnections].getInputStream();

        OutputStream sslOS = sslSockets[nConnections].getOutputStream();

        sslOS.write(237);

        sslOS.flush();

        int read = sslIS.read();

        SSLSession sess = sslSockets[nConnections].getSession();

        if (!sessions.contains(sess))

            sessions.add(sess);

        nConnections++;

        // test the number of sessions cached against the cache size

        checkCachedSessions(sessCtx, nConnections);

        for (int i = 0; i < nConnections; i++) {

            sslSockets[i].close();

        }

        System.out.println("Session cache size tests passed");

    }

    void checkCachedSessions(SSLSessionContext sessCtx,

                int nConn) throws Exception {

        int nSessions = 0;

        Enumeration e = sessCtx.getIds();

        int cacheSize = sessCtx.getSessionCacheSize();

        SSLSession sess;

        while (e.hasMoreElements()) {

            sess = sessCtx.getSession((byte[]) e.nextElement());

            long lastAccessedTime  = sess.getLastAccessedTime();

                System.out.println(sess + "       "

                        +  new Date(lastAccessedTime));

            nSessions++;

        }

        System.out.println("--------------------------------------------"

                                + "----------------------------");

        if ((cacheSize > 0) && (nSessions > cacheSize)) {

            // close all active connections before exiting

            for (int conn = nConn; conn < MAX_ACTIVE_CONNECTIONS; conn++) {

                SSLSocket s = (SSLSocket) sslsf.createSocket("localhost",

                        serverPorts [conn % (serverPorts.length)]);

                s.close();

            }

            throw new Exception("Session cache size test failed,"

                + " current cache size: " + cacheSize + " #sessions cached: "

                + nSessions);

        }

    }

    /*

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

     * The remainder is just support stuff

     */

    /*

     * #of ports > 1, guarantees creation of more than one session.

     * Using four ports (one per each connection), we are able to create

     * alteast four sessions.

     */

    int serverPorts[] = new int[]{0, 0, 0, 0};  // MAX_ACTIVE_CONNECTIONS: 4

    int createdPorts = 0;

    static SSLServerSocketFactory sslssf;

    static SSLSocketFactory sslsf;

    static SSLContext sslctx;

    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);

        // test the effect of javax.net.ssl.sessionCacheSize

        System.setProperty("javax.net.ssl.sessionCacheSize", String.valueOf(0));

        sslctx = SSLContext.getInstance("TLS");

        KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");

        KeyStore ks = KeyStore.getInstance("JKS");

        ks.load(new FileInputStream(keyFilename), passwd.toCharArray());

        kmf.init(ks, passwd.toCharArray());

        sslctx.init(kmf.getKeyManagers(), null, null);

        sslssf = (SSLServerSocketFactory) sslctx.getServerSocketFactory();

        sslsf = (SSLSocketFactory) sslctx.getSocketFactory();

        if (debug)

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

        /*

         * Start the tests.

         */

        new SessionCacheSizeTests();

    }

    Thread clientThread = null;

    Thread serverThread = null;

    /*

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

     *

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

     */

    SessionCacheSizeTests() throws Exception {

        /*

         * create the SSLServerSocket and SSLSocket factories

         */

        /*

         * Divide the max connections among the available server ports.

         * The use of more than one server port ensures creation of more

         * than one session.

         */

        int serverConns = MAX_ACTIVE_CONNECTIONS / (serverPorts.length);

        int remainingConns = MAX_ACTIVE_CONNECTIONS % (serverPorts.length);

        Exception startException = null;

        try {

            if (separateServerThread) {

                for (int i = 0; i < serverPorts.length; i++) {

                    // distribute remaining connections among the

                    // available ports

                    if (i < remainingConns)

                        startServer(serverPorts[i], (serverConns + 1), true);

                    else

                        startServer(serverPorts[i], serverConns, true);

                }

                startClient(false);

            } else {

                startClient(true);

                for (int i = 0; i < serverPorts.length; i++) {

                    if (i < remainingConns)

                        startServer(serverPorts[i], (serverConns + 1), false);

                    else

                        startServer(serverPorts[i], serverConns, 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.

         */

        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(final int port, final int nConns,

                        boolean newThread) throws Exception {

        if (newThread) {

            serverThread = new Thread() {

                public void run() {

                    try {

                        doServerSide(port, nConns);

                    } catch (Exception e) {

                        /*

                         * Our server thread just died.

                         *

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

                         */

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

                        e.printStackTrace();

                        serverReady = true;

                        serverException = e;

                    }

                }

            };

            serverThread.start();

        } else {

            try {

                doServerSide(port, nConns);

            } catch (Exception e) {

                serverException = e;

            } finally {

                serverReady = true;

            }

        }

    }

    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 {

            try {

                doClientSide();

            } catch (Exception e) {

                clientException = e;

            }

        }

    }

}