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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.4. Note: this package includes the NTRU encryption algorithms.

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package org.bouncycastle.crypto.tls.test;

import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.security.SecureRandom;

import junit.framework.TestCase;

import org.bouncycastle.crypto.tls.TlsClientProtocol;
import org.bouncycastle.crypto.tls.TlsServerProtocol;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.io.Streams;

public class TlsProtocolTest
    extends TestCase
{
    public void testClientServer()
        throws Exception
    {
        SecureRandom secureRandom = new SecureRandom();

        PipedInputStream clientRead = new PipedInputStream();
        PipedInputStream serverRead = new PipedInputStream();
        PipedOutputStream clientWrite = new PipedOutputStream(serverRead);
        PipedOutputStream serverWrite = new PipedOutputStream(clientRead);

        TlsClientProtocol clientProtocol = new TlsClientProtocol(clientRead, clientWrite, secureRandom);
        TlsServerProtocol serverProtocol = new TlsServerProtocol(serverRead, serverWrite, secureRandom);

        ServerThread serverThread = new ServerThread(serverProtocol);
        serverThread.start();

        MockTlsClient client = new MockTlsClient(null);
        clientProtocol.connect(client);

        // NOTE: Because we write-all before we read-any, this length can't be more than the pipe capacity
        int length = 1000;

        byte[] data = new byte[length];
        secureRandom.nextBytes(data);

        OutputStream output = clientProtocol.getOutputStream();
        output.write(data);

        byte[] echo = new byte[data.length];
        int count = Streams.readFully(clientProtocol.getInputStream(), echo);

        assertEquals(count, data.length);
        assertTrue(Arrays.areEqual(data, echo));

        output.close();

        serverThread.join();
    }

    static class ServerThread
        extends Thread
    {
        private final TlsServerProtocol serverProtocol;

        ServerThread(TlsServerProtocol serverProtocol)
        {
            this.serverProtocol = serverProtocol;
        }

        public void run()
        {
            try
            {
                MockTlsServer server = new MockTlsServer();
                serverProtocol.accept(server);
                Streams.pipeAll(serverProtocol.getInputStream(), serverProtocol.getOutputStream());
                serverProtocol.close();
            }
            catch (Exception e)
            {
//                throw new RuntimeException(e);
            }
        }
    }
}