/*

 * Copyright (c) 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.

 */

import javax.net.ssl.*;

import javax.net.ssl.SSLEngineResult.*;

import java.io.*;

import java.nio.*;

import java.security.KeyStore;

import java.security.PrivateKey;

import java.security.KeyFactory;

import java.security.cert.Certificate;

import java.security.cert.CertificateFactory;

import java.security.spec.*;

import java.util.Base64;

public abstract class ClientHelloInterOp {

    /*

     * Certificates and keys used in the test.

     */

    // Trusted certificates.

    private final static String[] trustedCertStrs = {

        // SHA256withECDSA, curve prime256v1

        // Validity

        //     Not Before: Nov  9 03:24:05 2016 GMT

        //     Not After : Oct 20 03:24:05 2037 GMT

        "-----BEGIN CERTIFICATE-----\n" +

        "MIICHDCCAcGgAwIBAgIJAM83C/MVp9F5MAoGCCqGSM49BAMCMDsxCzAJBgNVBAYT\n" +

        "AlVTMQ0wCwYDVQQKEwRKYXZhMR0wGwYDVQQLExRTdW5KU1NFIFRlc3QgU2VyaXZj\n" +

        "ZTAeFw0xNjExMDkwMzI0MDVaFw0zNzEwMjAwMzI0MDVaMDsxCzAJBgNVBAYTAlVT\n" +

        "MQ0wCwYDVQQKEwRKYXZhMR0wGwYDVQQLExRTdW5KU1NFIFRlc3QgU2VyaXZjZTBZ\n" +

        "MBMGByqGSM49AgEGCCqGSM49AwEHA0IABGeQXwyeNyU4UAATfwUbMO5zaREI21Wh\n" +

        "bds6WDu+PmfK8SWsTgsgpYxBRui+fZtYqSmbdjkurvAQ3j2fvN++BtWjga0wgaow\n" +

        "HQYDVR0OBBYEFDF/OeJ82qBSRkAm1rdZUPbWfDzyMGsGA1UdIwRkMGKAFDF/OeJ8\n" +

        "2qBSRkAm1rdZUPbWfDzyoT+kPTA7MQswCQYDVQQGEwJVUzENMAsGA1UEChMESmF2\n" +

        "YTEdMBsGA1UECxMUU3VuSlNTRSBUZXN0IFNlcml2Y2WCCQDPNwvzFafReTAPBgNV\n" +

        "HRMBAf8EBTADAQH/MAsGA1UdDwQEAwIBBjAKBggqhkjOPQQDAgNJADBGAiEAlHQY\n" +

        "QFPlODOsjLVQYSxgeSUvYzMp0vP8naeVB9bfFG8CIQCFfrKZvhq9z3bOtlYKxs2a\n" +

        "EWUjUZ82a1JTqkP+lgHY5A==\n" +

        "-----END CERTIFICATE-----",

        // SHA256withRSA, 2048 bits

        // Validity

        //     Not Before: Nov  9 03:24:16 2016 GMT

        //     Not After : Oct 20 03:24:16 2037 GMT

        "-----BEGIN CERTIFICATE-----\n" +

        "MIIDpzCCAo+gAwIBAgIJAJAYpR2aIlA1MA0GCSqGSIb3DQEBCwUAMDsxCzAJBgNV\n" +

        "BAYTAlVTMQ0wCwYDVQQKEwRKYXZhMR0wGwYDVQQLExRTdW5KU1NFIFRlc3QgU2Vy\n" +

        "aXZjZTAeFw0xNjExMDkwMzI0MTZaFw0zNzEwMjAwMzI0MTZaMDsxCzAJBgNVBAYT\n" +

        "AlVTMQ0wCwYDVQQKEwRKYXZhMR0wGwYDVQQLExRTdW5KU1NFIFRlc3QgU2VyaXZj\n" +

        "ZTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAL+F/FTPODYzsU0Pakfp\n" +

        "lsh88YoQWZPjABhCU+HPsCTMYc8UBkaiduUzregwwVBW3D7kmec2K408krGQsxdy\n" +

        "oKJA12GL/XX1YgzDEsyBRk/gvex5lPaBIZiJ5IZlUfjLuRDGxPjtRelBTpZ7SUet\n" +

        "PJVZz6zV6hMPGO6kQzCtbzzET515EE0okIS40LkAmtWoOmVm3gRldomaZTrZ0V2L\n" +

        "MMaJGzrXYqk0SX+PYul8v+2EEHeMuaXG/XpK5xsg9gZvzpKqFQcBOdENoJHB07go\n" +

        "jCmRC328ALqr+bMyktKAuYfB+mhjmN2AU8TQx72WPpvNTXxFDYcwo+8254cCAVKB\n" +

        "e98CAwEAAaOBrTCBqjAdBgNVHQ4EFgQUlJQlQTbi8YIyiNf+SqF7LtH+gicwawYD\n" +

        "VR0jBGQwYoAUlJQlQTbi8YIyiNf+SqF7LtH+giehP6Q9MDsxCzAJBgNVBAYTAlVT\n" +

        "MQ0wCwYDVQQKEwRKYXZhMR0wGwYDVQQLExRTdW5KU1NFIFRlc3QgU2VyaXZjZYIJ\n" +

        "AJAYpR2aIlA1MA8GA1UdEwEB/wQFMAMBAf8wCwYDVR0PBAQDAgEGMA0GCSqGSIb3\n" +

        "DQEBCwUAA4IBAQAI0lTY0YAKQ2VdoIQ6dnqolphLVWdNGiC9drHEYSn7+hmAD2r2\n" +

        "v1U/9m752TkcT74a65xKbEVuVtleD/w6i+QjALW2PYt6ivjOnnY0a9Y9a9UCa00j\n" +

        "C9415sCw84Tp9VoKtuYqzhN87bBUeABOw5dsW3z32C2N/YhprkqeF/vdx4JxulPr\n" +

        "PKze5BREXnKLA1ISoDioCPphvNMKrSpkAofb1rTCwtgt5V/WFls283L52ORmpRGO\n" +

        "Ja88ztXOz00ZGu0RQLwlmpN7m8tNgA/5MPrldyYIwegP4RSkkJlF/8+hxvvqfJhK\n" +

        "FFDa0HHQSJfR2b9628Iniw1UHOMMT6qx5EHr\n" +

        "-----END CERTIFICATE-----"

        };

    // End entity certificate.

    private final static String[] endEntityCertStrs = {

        // SHA256withECDSA, curve prime256v1

        // Validity

        //     Not Before: Nov  9 03:24:05 2016 GMT

        //     Not After : Jul 27 03:24:05 2036 GMT

        "-----BEGIN CERTIFICATE-----\n" +

        "MIIB1DCCAXmgAwIBAgIJAKVa+4dIUjaLMAoGCCqGSM49BAMCMDsxCzAJBgNVBAYT\n" +

        "AlVTMQ0wCwYDVQQKEwRKYXZhMR0wGwYDVQQLExRTdW5KU1NFIFRlc3QgU2VyaXZj\n" +

        "ZTAeFw0xNjExMDkwMzI0MDVaFw0zNjA3MjcwMzI0MDVaMFIxCzAJBgNVBAYTAlVT\n" +

        "MQ0wCwYDVQQKDARKYXZhMR0wGwYDVQQLDBRTdW5KU1NFIFRlc3QgU2VyaXZjZTEV\n" +

        "MBMGA1UEAwwMSW50ZXJPcCBUZXN0MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE\n" +

        "h4vXNUJzULq4e7fAOvF0WiWU6cllOAMus1GqTFvcnRPOChl8suZsvksO0CpZqL3h\n" +

        "jXmVX9dp1FV/rUBGLo1aG6NPME0wCwYDVR0PBAQDAgPoMB0GA1UdDgQWBBSO8V5+\n" +

        "bj0ik0T9BtJc4jLJt7m6wjAfBgNVHSMEGDAWgBQxfznifNqgUkZAJta3WVD21nw8\n" +

        "8jAKBggqhkjOPQQDAgNJADBGAiEAk7MF+L9bFRwUsbPsBCbCqH9DMdzBQR+kFDNf\n" +

        "lfn8Rs4CIQD9qWvBXd+EJqwraxiX6cftaFchn+T2HpvMboy+irMFow==\n" +

        "-----END CERTIFICATE-----",

        // SHA256withRSA, 2048 bits

        // Validity

        //     Not Before: Nov  9 03:24:16 2016 GMT

        //     Not After : Jul 27 03:24:16 2036 GMT

        "-----BEGIN CERTIFICATE-----\n" +

        "MIIDczCCAlugAwIBAgIJAPhM2oUKx0aJMA0GCSqGSIb3DQEBCwUAMDsxCzAJBgNV\n" +

        "BAYTAlVTMQ0wCwYDVQQKEwRKYXZhMR0wGwYDVQQLExRTdW5KU1NFIFRlc3QgU2Vy\n" +

        "aXZjZTAeFw0xNjExMDkwMzI0MTZaFw0zNjA3MjcwMzI0MTZaMFIxCzAJBgNVBAYT\n" +

        "AlVTMQ0wCwYDVQQKDARKYXZhMR0wGwYDVQQLDBRTdW5KU1NFIFRlc3QgU2VyaXZj\n" +

        "ZTEVMBMGA1UEAwwMSW50ZXJPcCBUZXN0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A\n" +

        "MIIBCgKCAQEA36tJaXfJ2B/AFvES+tnueyQPSNABVu9nfMdU+NEPamJ+FH7cEF8Z\n" +

        "1Spr1vlQgNzCpDUVrfnmT75rCapgz5ldA9+y+3hdfUyHjZBzzfx+6GHXLB4u6eU2\n" +

        "NATa7vqSLNbcLcfZ7/QmkFqg4JRJbX4F42kKkRJrWdKZ8UoCYC8WXWvDaZ3nUs05\n" +

        "XHe+mBJ8qMNPTbYST1jpzXPyH5CljlFGYi2mKJDTImDhwht7mu2+zvwvbJ81Gj2X\n" +

        "JUSTSf9fu0zxFcCk6RmJPw9nSVqePVlOwtNNBodfKN+k4yr+gOz1v8NmMtmEtklV\n" +

        "Sulr/J4QxI+E2Zar/C+4XjxkvstIS+PNKQIDAQABo2MwYTALBgNVHQ8EBAMCA+gw\n" +

        "HQYDVR0OBBYEFHt19CItAz0VOF0WKGWwaT4DtEsSMB8GA1UdIwQYMBaAFJSUJUE2\n" +

        "4vGCMojX/kqhey7R/oInMBIGA1UdEQEB/wQIMAaHBH8AAAEwDQYJKoZIhvcNAQEL\n" +

        "BQADggEBACKYZWvo9B9IEpCCdBba2sNo4X1NI/VEY3fyUx1lkw+Kna+1d2Ab+RCZ\n" +

        "cf3Y85fcwv03hNE///wNBp+Nde4NQRDK/oiQARzWwWslfinm5d83eQwzC3cpSzt+\n" +

        "7ts6M5UlOblGsLXZI7THWO1tkgoEra9p+zezxLMmf/2MpNyZMZlVoJPM2YGxU9cN\n" +

        "ws0AyeY1gpBEdT21vjsBPdxxj6qklXVMnzS3zF8YwXyOndDYQWdjmFEknRK/qmQ2\n" +

        "gkLHrzpSpyCziecna5mGuDRdCU2dpsWiq1npEPXTq+PQGwWYcoaFTtXF8DDqhfPC\n" +

        "4Abe8gPm6MfzerdmS3RFTj9b/DIIENM=\n" +

        "-----END CERTIFICATE-----"

        };

    // Private key in the format of PKCS#8.

    private final static String[] endEntityPrivateKeys = {

        //

        // EC private key related to cert endEntityCertStrs[0].

        //

        "MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgA3pmS+OrIjGyUv2F\n" +

        "K/PkyayJIePM2RTFYxNoQqmJGnihRANCAASHi9c1QnNQurh7t8A68XRaJZTpyWU4\n" +

        "Ay6zUapMW9ydE84KGXyy5my+Sw7QKlmoveGNeZVf12nUVX+tQEYujVob",

        //

        // RSA private key related to cert endEntityCertStrs[1].

        //

        "MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDfq0lpd8nYH8AW\n" +

        "8RL62e57JA9I0AFW72d8x1T40Q9qYn4UftwQXxnVKmvW+VCA3MKkNRWt+eZPvmsJ\n" +

        "qmDPmV0D37L7eF19TIeNkHPN/H7oYdcsHi7p5TY0BNru+pIs1twtx9nv9CaQWqDg\n" +

        "lEltfgXjaQqREmtZ0pnxSgJgLxZda8NpnedSzTlcd76YEnyow09NthJPWOnNc/If\n" +

        "kKWOUUZiLaYokNMiYOHCG3ua7b7O/C9snzUaPZclRJNJ/1+7TPEVwKTpGYk/D2dJ\n" +

        "Wp49WU7C000Gh18o36TjKv6A7PW/w2Yy2YS2SVVK6Wv8nhDEj4TZlqv8L7hePGS+\n" +

        "y0hL480pAgMBAAECggEBAJyP1zk+IkloIBtu7+wrdCU6HoDHKMjjlzrehHoOTI4Z\n" +

        "F0vdaMkE6J4vrYCyz0kEPjKW/e/jxvT2wxHm8xEdtuApS61+mWJFmXTcMlNzdJnR\n" +

        "Mr6s+gW67fAHngA94OgGFeTtyX2PFxdgeM/6vFMqLZD7S+w0SnR7WEpvla4iB7On\n" +

        "lXqhJKVQeVc+IpByg/S4MmJb91jck73GltCaCL/b6BTrsz+zc/AY5tb8JInxjMZ9\n" +

        "jmjmA+s6l7tnBrFQfJHlF9a374lxCOtZTxyxVJjD7tQcGpsUpSHXZGdpDcT34qYT\n" +

        "UGh0yp2Mc/1PfWni5gS/6UGLrYmT57RRCn5YJBJTEkkCgYEA/XPCNehFaOMSxOZh\n" +

        "OGBVhQ+eRAmdpJfMhSUsDdEdQLZyWGmZsMTHjZZrwevBX/D0dxQYDv/sAl0GZomJ\n" +

        "d6iRCHlscycwx5Q0U/EpacsgRlYHz1nMRzXqS3Ry+8O8qQlliqCLUM7SfVgzdI5/\n" +

        "ll9JMrng9NnRl8ccjEdOGK8g/MMCgYEA4eriKMfRslGY4uOQoTPbuEJSMMwQ2X4k\n" +

        "lPj1p+xSQfU9QBaWJake67oBj3vpCxqN7/VkvCIeC6LCjhLpWHCn4EkdGiqkEdWz\n" +

        "m5CHzpzVIgznzWnbt0rCVL2KdL+ihgY8KPDdsZ6tZrABHuYhsWkAu10wyvuQYM88\n" +

        "3u6yOIQn36MCgYEAk5qR1UEzAxWTPbaJkgKQa5Cf9DHBbDS3eCcg098f8SsPxquh\n" +

        "RRAkwzGCCgqZsJ0sUhkStdGXifzRGHAq7dPuuwe0ABAn2WNXYjeFjcYtQqkhnUFH\n" +

        "tYURsOXdfQAOZEdDqos691GrxjHSraO7bECL6Y3VE+Oyq3jbCFsSgU+kn28CgYBT\n" +

        "mrXZO6FJqVK33FlAns1YEgsSjeJKapklHEDkxNroF9Zz6ifkhgKwX6SGMefbORd/\n" +

        "zsNZsBKIYdI3+52pIf+uS8BeV5tiEkCmeEUZ3AYv1LDP3rX1zc++xmn/rI97o8EN\n" +

        "sZ2JRtyK3OV9RtL/MYmYzPLqm1Ah02+GXLVNnvKWmwKBgE8Ble8CzrXYuuPdGxXz\n" +

        "BZU6HnXQrmTUcgeze0tj8SDHzCfsGsaG6pHrVNkT7CKsRuCHTZLM0kXmUijLFKuP\n" +

        "5xyE257z4IbbEbs+tcbB3p28n4/47MzZkSR3kt8+FrsEMZq5oOHbFTGzgp9dhZCC\n" +

        "dKUqlw5BPHdbxoWB/JpSHGCV"

        };

    // Private key names of endEntityPrivateKeys.

    private final static String[] endEntityPrivateKeyNames = {

        "EC",

        "RSA"

        };

    /*

     * Run the test case.

     */

    public void run() throws Exception {

        SSLEngine serverEngine = createServerEngine();

        //

        // Create and size the buffers appropriately.

        //

        SSLSession session = serverEngine.getSession();

        ByteBuffer serverAppInbound =

            ByteBuffer.allocate(session.getApplicationBufferSize());

        ByteBuffer clientHello =

            ByteBuffer.allocate(session.getPacketBufferSize());

        //

        // Generate a ClientHello message, and check if the server

        // engine can read it or not.

        //

        clientHello.put(createClientHelloMessage());

        clientHello.flip();

        SSLEngineResult serverResult =

                serverEngine.unwrap(clientHello, serverAppInbound);

        log("Server unwrap: ", serverResult);

        runDelegatedTasks(serverResult, serverEngine);

        //

        // Generate server responses to the ClientHello request.

        //

        ByteBuffer clientNetInbound =

            ByteBuffer.allocate(session.getPacketBufferSize());

        ByteBuffer clientAppInbound =

            ByteBuffer.wrap("Hello Client, I'm Server".getBytes());

        serverResult = serverEngine.wrap(clientAppInbound, clientNetInbound);

        log("Server wrap: ", serverResult);

        runDelegatedTasks(serverResult, serverEngine);

    }

    /*

     * Create a ClientHello message.

     */

    abstract protected byte[] createClientHelloMessage();

    /*

     * Create an instance of SSLContext for client use.

     */

    protected SSLContext createClientSSLContext() throws Exception {

        return createSSLContext(trustedCertStrs, null, null, null);

    }

    /*

     * Create an instance of SSLContext for server use.

     */

    protected SSLContext createServerSSLContext() throws Exception {

        return createSSLContext(null,

                endEntityCertStrs, endEntityPrivateKeys,

                endEntityPrivateKeyNames);

    }

    /*

     * Create an instance of SSLContext with the specified trust/key materials.

     */

    protected SSLContext createSSLContext(

            String[] trustedMaterials,

            String[] keyMaterialCerts,

            String[] keyMaterialKeys,

            String[] keyMaterialKeyAlgs) throws Exception {

        KeyStore ts = null;     // trust store

        KeyStore ks = null;     // key store

        char passphrase[] = "passphrase".toCharArray();

        // Generate certificate from cert string.

        CertificateFactory cf = CertificateFactory.getInstance("X.509");

        // Import the trused certs.

        ByteArrayInputStream is;

        if (trustedMaterials != null && trustedMaterials.length != 0) {

            ts = KeyStore.getInstance("JKS");

            ts.load(null, null);

            Certificate[] trustedCert =

                    new Certificate[trustedMaterials.length];

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

                String trustedCertStr = trustedMaterials[i];

                is = new ByteArrayInputStream(trustedCertStr.getBytes());

                try {

                    trustedCert[i] = cf.generateCertificate(is);

                } finally {

                    is.close();

                }

                ts.setCertificateEntry("trusted-cert-" + i, trustedCert[i]);

            }

        }

        // Import the key materials.

        //

        // Note that certification pathes bigger than one are not supported yet.

        boolean hasKeyMaterials =

            (keyMaterialCerts != null) && (keyMaterialCerts.length != 0) &&

            (keyMaterialKeys != null) && (keyMaterialKeys.length != 0) &&

            (keyMaterialKeyAlgs != null) && (keyMaterialKeyAlgs.length != 0) &&

            (keyMaterialCerts.length == keyMaterialKeys.length) &&

            (keyMaterialCerts.length == keyMaterialKeyAlgs.length);

        if (hasKeyMaterials) {

            ks = KeyStore.getInstance("JKS");

            ks.load(null, null);

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

                String keyCertStr = keyMaterialCerts[i];

                // generate the private key.

                PKCS8EncodedKeySpec priKeySpec = new PKCS8EncodedKeySpec(

                    Base64.getMimeDecoder().decode(keyMaterialKeys[i]));

                KeyFactory kf =

                    KeyFactory.getInstance(keyMaterialKeyAlgs[i]);

                PrivateKey priKey = kf.generatePrivate(priKeySpec);

                // generate certificate chain

                is = new ByteArrayInputStream(keyCertStr.getBytes());

                Certificate keyCert = null;

                try {

                    keyCert = cf.generateCertificate(is);

                } finally {

                    is.close();

                }

                Certificate[] chain = new Certificate[] { keyCert };

                // import the key entry.

                ks.setKeyEntry("cert-" + i, priKey, passphrase, chain);

            }

        }

        // Create an SSLContext object.

        TrustManagerFactory tmf = TrustManagerFactory.getInstance("PKIX");

        tmf.init(ts);

        SSLContext context = SSLContext.getInstance("TLS");

        if (hasKeyMaterials && ks != null) {

            KeyManagerFactory kmf = KeyManagerFactory.getInstance("NewSunX509");

            kmf.init(ks, passphrase);

            context.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);

        } else {

            context.init(null, tmf.getTrustManagers(), null);

        }

        return context;

    }

    /*

     * Create an instance of SSLEngine in client mode.

     */

    protected SSLEngine createClientEngine() throws Exception {

        return createClientEngine(createClientSSLContext());

    }

    /*

     * Create an instance of SSLEngine in client mode with the

     * specified SSLContext object.

     */

    protected SSLEngine createClientEngine(

        SSLContext context) throws Exception {

        SSLEngine engine = context.createSSLEngine();

        engine.setUseClientMode(true);

        /*

         * Customize the SSLEngine object.

         */

        // blank

        return engine;

    }

    /*

     * Create an instance of SSLEngine in server mode.

     */

    protected SSLEngine createServerEngine() throws Exception {

        return createServerEngine(createServerSSLContext());

    }

    /*

     * Create an instance of SSLEngine in server mode with the

     * specified SSLContext object.

     */

    protected SSLEngine createServerEngine(

        SSLContext context) throws Exception {

        SSLEngine engine = context.createSSLEngine();

        engine.setUseClientMode(false);

        /*

         * Customize the SSLEngine object.

         */

        engine.setNeedClientAuth(false);

        return engine;

    }

    /*

     * Run the delagayed tasks if any.

     *

     * If the result indicates that we have outstanding tasks to do,

     * go ahead and run them in this thread.

     */

    protected static void runDelegatedTasks(SSLEngineResult result,

            SSLEngine engine) throws Exception {

        if (result.getHandshakeStatus() == HandshakeStatus.NEED_TASK) {

            Runnable runnable;

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

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

                runnable.run();

            }

            HandshakeStatus hsStatus = engine.getHandshakeStatus();

            if (hsStatus == HandshakeStatus.NEED_TASK) {

                throw new Exception(

                    "handshake shouldn't need additional tasks");

            }

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

        }

    }

    /*

     * Logging the specificated message and the SSLEngine operation result.

     */

    protected static void log(String str, SSLEngineResult result) {

        HandshakeStatus hsStatus = result.getHandshakeStatus();

        log(str +

            result.getStatus() + "/" + hsStatus + ", consumed: " +

            result.bytesConsumed() + "/produced: " + result.bytesProduced() +

            " bytes");

        if (hsStatus == HandshakeStatus.FINISHED) {

            log("\t...ready for application data");

        }

    }

    /*

     * Logging the specificated message.

     */

    protected static void log(String str) {

        System.out.println(str);

    }

}