/*

 * Copyright (c) 2018, 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 8164879

 * @library /lib/testlibrary ../../

 * @summary Verify AES/GCM's limits set in the jdk.tls.keyLimits property

 * start a new handshake sequence to renegotiate the symmetric key with an

 * SSLSocket connection.  This test verifies the handshake method was called

 * via debugging info.  It does not verify the renegotiation was successful

 * as that is very hard.

 *

 * @run main SSLEngineKeyLimit 0 server AES/GCM/NoPadding keyupdate 1050000

 * @run main SSLEngineKeyLimit 1 client AES/GCM/NoPadding keyupdate 2^22

 */

/*

 * This test runs in another process so we can monitor the debug

 * results.  The OutputAnalyzer must see correct debug output to return a

 * success.

 */

import javax.net.ssl.KeyManagerFactory;

import javax.net.ssl.SSLContext;

import javax.net.ssl.SSLEngine;

import javax.net.ssl.SSLEngineResult;

import javax.net.ssl.TrustManagerFactory;

import java.io.File;

import java.io.PrintWriter;

import java.nio.ByteBuffer;

import java.security.KeyStore;

import java.security.SecureRandom;

import java.util.Arrays;

import jdk.testlibrary.ProcessTools;

import jdk.testlibrary.Utils;

import jdk.testlibrary.OutputAnalyzer;

public class SSLEngineKeyLimit {

    SSLEngine eng;

    static ByteBuffer cTos;

    static ByteBuffer sToc;

    static ByteBuffer outdata;

    ByteBuffer buf;

    static boolean ready = false;

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

    static String keyStoreFile = "keystore";

    static String passwd = "passphrase";

    static String keyFilename;

    static int dataLen = 10240;

    static boolean serverwrite = true;

    int totalDataLen = 0;

    static boolean sc = true;

    int delay = 1;

    static boolean readdone = false;

    // Turn on debugging

    static boolean debug = false;

    SSLEngineKeyLimit() {

        buf = ByteBuffer.allocate(dataLen*4);

    }

    /**

     * args should have two values:  server|client, <limit size>

     * Prepending 'p' is for internal use only.

     */

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

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

            System.out.print(" " + args[i]);

        }

        System.out.println();

        if (args[0].compareTo("p") != 0) {

            boolean expectedFail = (Integer.parseInt(args[0]) == 1);

            if (expectedFail) {

                System.out.println("Test expected to not find updated msg");

            }

            // Write security property file to overwrite default

            File f = new File("keyusage."+ System.nanoTime());

            PrintWriter p = new PrintWriter(f);

            p.write("jdk.tls.keyLimits=");

            for (int i = 2; i < args.length; i++) {

                p.write(" "+ args[i]);

            }

            p.close();

            System.setProperty("test.java.opts",

                    "-Dtest.src=" + System.getProperty("test.src") +

                            " -Dtest.jdk=" + System.getProperty("test.jdk") +

                            " -Djavax.net.debug=ssl,handshake" +

                            " -Djava.security.properties=" + f.getName());

            System.out.println("test.java.opts: " +

                    System.getProperty("test.java.opts"));

            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true,

                    Utils.addTestJavaOpts("SSLEngineKeyLimit", "p", args[1]));

            OutputAnalyzer output = ProcessTools.executeProcess(pb);

            try {

                if (expectedFail) {

                    output.shouldNotContain("KeyUpdate: write key updated");

                    output.shouldNotContain("KeyUpdate: read key updated");

                } else {

                    output.shouldContain("KeyUpdate: triggered, read side");

                    output.shouldContain("KeyUpdate: triggered, write side");

                    output.shouldContain("KeyUpdate: write key updated");

                    output.shouldContain("KeyUpdate: read key updated");

                }

            } catch (Exception e) {

                throw e;

            } finally {

                System.out.println("-- BEGIN Stdout:");

                System.out.println(output.getStdout());

                System.out.println("-- END Stdout");

                System.out.println("-- BEGIN Stderr:");

                System.out.println(output.getStderr());

                System.out.println("-- END Stderr");

            }

            return;

        }

        if (args[0].compareTo("p") != 0) {

            throw new Exception ("Tried to run outside of a spawned process");

        }

        if (args[1].compareTo("client") == 0) {

            serverwrite = false;

        }

        cTos = ByteBuffer.allocateDirect(dataLen*4);

        keyFilename =

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

                "/" + keyStoreFile;

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

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

        sToc = ByteBuffer.allocateDirect(dataLen*4);

        outdata = ByteBuffer.allocateDirect(dataLen);

        byte[] data  = new byte[dataLen];

        Arrays.fill(data, (byte)0x0A);

        outdata.put(data);

        outdata.flip();

        cTos.clear();

        sToc.clear();

        Thread ts = new Thread(serverwrite ? new Client() : new Server());

        ts.start();

        (serverwrite ? new Server() : new Client()).run();

        ts.interrupt();

        ts.join();

    }

    private static void doTask(SSLEngineResult result,

            SSLEngine engine) throws Exception {

        if (result.getHandshakeStatus() ==

                SSLEngineResult.HandshakeStatus.NEED_TASK) {

            Runnable runnable;

            while ((runnable = engine.getDelegatedTask()) != null) {

                print("\trunning delegated task...");

                runnable.run();

            }

            SSLEngineResult.HandshakeStatus hsStatus =

                    engine.getHandshakeStatus();

            if (hsStatus == SSLEngineResult.HandshakeStatus.NEED_TASK) {

                throw new Exception(

                    "handshake shouldn't need additional tasks");

            }

            print("\tnew HandshakeStatus: " + hsStatus);

        }

    }

    static void print(String s) {

        if (debug) {

            System.out.println(s);

        }

    }

    static void log(String s, SSLEngineResult r) {

        if (!debug) {

            return;

        }

        System.out.println(s + ": " +

                r.getStatus() + "/" + r.getHandshakeStatus()+ " " +

                r.bytesConsumed() + "/" + r.bytesProduced() + " ");

    }

    void write() throws Exception {

        int i = 0;

        SSLEngineResult r;

        boolean again = true;

        while (!ready) {

            Thread.sleep(delay);

        }

        print("Write-side. ");

        while (i++ < 150) {

            while (sc) {

                if (readdone) {

                    return;

                }

                Thread.sleep(delay);

            }

            outdata.rewind();

            print("write wrap");

            while (true) {

                r = eng.wrap(outdata, getWriteBuf());

                log("write wrap", r);

                if (debug && r.getStatus() != SSLEngineResult.Status.OK) {

                    print("outdata pos: " + outdata.position() +

                            " rem: " + outdata.remaining() +

                            " lim: " + outdata.limit() +

                            " cap: " + outdata.capacity());

                    print("writebuf pos: " + getWriteBuf().position() +

                            " rem: " + getWriteBuf().remaining() +

                            " lim: " + getWriteBuf().limit() +

                            " cap: " + getWriteBuf().capacity());

                }

                if (again && r.getStatus() == SSLEngineResult.Status.OK &&

                        r.getHandshakeStatus() ==

                                SSLEngineResult.HandshakeStatus.NEED_WRAP) {

                    print("again");

                    again = false;

                    continue;

                }

                break;

            }

            doTask(r, eng);

            getWriteBuf().flip();

            sc = true;

            while (sc) {

                if (readdone) {

                    return;

                }

                Thread.sleep(delay);

            }

            while (true) {

                buf.clear();

                r = eng.unwrap(getReadBuf(), buf);

                log("write unwrap", r);

                if (debug && r.getStatus() != SSLEngineResult.Status.OK) {

                    print("buf pos: " + buf.position() +

                            " rem: " + buf.remaining() +

                            " lim: " + buf.limit() +

                            " cap: " + buf.capacity());

                    print("readbuf pos: " + getReadBuf().position() +

                            " rem: " + getReadBuf().remaining() +

                            " lim: " + getReadBuf().limit() +

                            " cap:"  + getReadBuf().capacity());

                }

                break;

            }

            doTask(r, eng);

            getReadBuf().compact();

            print("compacted readbuf pos: " + getReadBuf().position() +

                    " rem: " + getReadBuf().remaining() +

                    " lim: " + getReadBuf().limit() +

                    " cap: " + getReadBuf().capacity());

            sc = true;

        }

    }

    void read() throws Exception {

        byte b = 0x0B;

        ByteBuffer buf2 = ByteBuffer.allocateDirect(dataLen);

        SSLEngineResult r = null;

        boolean exit, again = true;

        while (eng == null) {

            Thread.sleep(delay);

        }

        try {

            System.out.println("connected");

            print("entering read loop");

            ready = true;

            while (true) {

                while (!sc) {

                    Thread.sleep(delay);

                }

                print("read wrap");

                exit = false;

                while (!exit) {

                    buf2.put(b);

                    buf2.flip();

                    r = eng.wrap(buf2, getWriteBuf());

                    log("read wrap", r);

                    if (debug) {

                             // && r.getStatus() != SSLEngineResult.Status.OK) {

                        print("buf2 pos: " + buf2.position() +

                                " rem: " + buf2.remaining() +

                                " cap: " + buf2.capacity());

                        print("writebuf pos: " + getWriteBuf().position() +

                                " rem: " + getWriteBuf().remaining() +

                                " cap: " + getWriteBuf().capacity());

                    }

                    if (again && r.getStatus() == SSLEngineResult.Status.OK &&

                            r.getHandshakeStatus() ==

                                SSLEngineResult.HandshakeStatus.NEED_WRAP) {

                        buf2.compact();

                        again = false;

                        continue;

                    }

                    exit = true;

                }

                doTask(r, eng);

                buf2.clear();

                getWriteBuf().flip();

                sc = false;

                while (!sc) {

                    Thread.sleep(delay);

                }

                while (true) {

                        buf.clear();

                        r = eng.unwrap(getReadBuf(), buf);

                        log("read unwrap", r);

                        if (debug &&

                                r.getStatus() != SSLEngineResult.Status.OK) {

                            print("buf pos " + buf.position() +

                                    " rem: " + buf.remaining() +

                                    " lim: " + buf.limit() +

                                    " cap: " + buf.capacity());

                            print("readbuf pos: " + getReadBuf().position() +

                                    " rem: " + getReadBuf().remaining() +

                                    " lim: " + getReadBuf().limit() +

                                    " cap: " + getReadBuf().capacity());

                            doTask(r, eng);

                        }

                    if (again && r.getStatus() == SSLEngineResult.Status.OK &&

                            r.getHandshakeStatus() ==

                                SSLEngineResult.HandshakeStatus.NEED_UNWRAP) {

                        buf.clear();

                        print("again");

                        again = false;

                        continue;

                    }

                    break;

                }

                buf.clear();

                getReadBuf().compact();

                totalDataLen += r.bytesProduced();

                sc = false;

            }

        } catch (Exception e) {

            sc = false;

            readdone = true;

            System.out.println(e.getMessage());

            e.printStackTrace();

            System.out.println("Total data read = " + totalDataLen);

        }

    }

    ByteBuffer getReadBuf() {

        return null;

    }

    ByteBuffer getWriteBuf() {

        return null;

    }

    SSLContext initContext() throws Exception {

        SSLContext sc = SSLContext.getInstance("TLSv1.3");

        KeyStore ks = KeyStore.getInstance(

                new File(System.getProperty("javax.net.ssl.keyStore")),

                passwd.toCharArray());

        KeyManagerFactory kmf = KeyManagerFactory.getInstance(

                KeyManagerFactory.getDefaultAlgorithm());

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

        TrustManagerFactory tmf = TrustManagerFactory.getInstance(

                TrustManagerFactory.getDefaultAlgorithm());

        tmf.init(ks);

        sc.init(kmf.getKeyManagers(),

                tmf.getTrustManagers(), new SecureRandom());

        return sc;

    }

    static class Server extends SSLEngineKeyLimit implements Runnable {

        Server() throws Exception {

            super();

            eng = initContext().createSSLEngine();

            eng.setUseClientMode(false);

            eng.setNeedClientAuth(true);

        }

        public void run() {

            try {

                if (serverwrite) {

                    write();

                } else {

                    read();

                }

            } catch (Exception e) {

                System.out.println("server: " + e.getMessage());

                e.printStackTrace();

            }

            System.out.println("Server closed");

        }

        @Override

        ByteBuffer getWriteBuf() {

            return sToc;

        }

        @Override

        ByteBuffer getReadBuf() {

            return cTos;

        }

    }

    static class Client extends SSLEngineKeyLimit implements Runnable {

        Client() throws Exception {

            super();

            eng = initContext().createSSLEngine();

            eng.setUseClientMode(true);

        }

        public void run() {

            try {

                if (!serverwrite) {

                    write();

                } else {

                    read();

                }

            } catch (Exception e) {

                System.out.println("client: " + e.getMessage());

                e.printStackTrace();

            }

            System.out.println("Client closed");

        }

        @Override

        ByteBuffer getWriteBuf() {

            return cTos;

        }

        @Override

        ByteBuffer getReadBuf() {

            return sToc;

        }

    }

}