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                                       // Each peer has an identity that must be locally (but not globally)
                                    // unique.  This identity and its associated public and private keys
                                    // are stored in a keystore and protected by a password.  Each
                                    // peer also has a name that must be globally unique.
                                    String stringIdentity = null;
                                    String stringPassword = null;
                                    String stringName = null;
                                    // The code that prompts the user for his/her identity
                                    // and password goes here.  the user‘s name is
                                    // generated (if necessary) later.
                                    // Create home directory.  This is a very portable way
                                    // to create a home directory, but it has its problems --
                                    // the various flavors of Microsoft Windows put the directory
                                    // in widely different locations in the directory hierarchy.
                                    String stringHome = System.getProperty("user.home") + File.separator + "p2p";
                                    File fileHome = new File(stringHome);
                                    if (fileHome.exists() == false)
                                    fileHome.mkdirs();
                                    // Create keystore.  We must run an external process to create the
                                    // keystore, because the security APIs don‘t expose enough
                                    // functionality to do this inline.  I haven‘t tested this widely enough
                                    // to know how portable this code is, but it works on everything I
                                    // tried it on.
                                    String stringKeyStore = stringHome + File.separator + "keystore";
                                    File fileKeyStore = new File(stringKeyStore);
                                    if (fileKeyStore.exists() == false)
                                    {
                                    System.out.println("Creating keystore...");
                                    byte [] arb = new byte [16];
                                    SecureRandom securerandom = SecureRandom.getInstance("SHA1PRNG");
                                    securerandom.nextBytes(arb);
                                    stringName = new String(Base64.encode(arb));
                                    String [] arstringCommand = new String []
                                    {
                                    System.getProperty("java.home") + File.separator + "bin" + File.separator + "keytool",
                                    "-genkey",
                                    "-alias", stringIdentity,
                                    "-keyalg", "RSA",
                                    "-keysize", "1024",
                                    "-dname", "CN=" + stringName,
                                    "-keystore", stringHome + File.separator + "keystore",
                                    "-keypass", stringPassword,
                                    "-storetype", "JCEKS",
                                    "-storepass", stringPassword
                                    };
                                    Process process = Runtime.getRuntime().exec(arstringCommand);
                                    process.waitFor();
                                    InputStream inputstream2 = process.getInputStream();
                                    IOUtils.copy(inputstream2, System.out);
                                    InputStream inputstream3 = process.getErrorStream();
                                    IOUtils.copy(inputstream3, System.out);
                                    if (process.exitValue() != 0)
                                    System.exit(-1);
                                    }
                                    // Once the application has created/located the keystore, it
                                    // opens it and creates a KeyStore instance from the data
                                    // in it.
                                    char [] archPassword = stringPassword.toCharArray();
                                    FileInputStream fileinputstream = new FileInputStream(stringHome + File.separator +
                                    "keystore");
                                    KeyStore keystore = KeyStore.getInstance("JCEKS");
                                    try
                                    {
                                    keystore.load(fileinputstream, archPassword);
                                    }
                                    catch (IOException ioexception)
                                    {
                                    System.out.println("Cannot load keystore.  Password may be wrong.");
                                    System.exit(-3);
                                    }
                                    if (keystore.containsAlias(stringIdentity) == false)
                                    {
                                    System.out.println("Cannot locate identity.");
                                    System.exit(-2);
                                    }
                                    // Create key manager.  The key manager holds this peer‘s
                                    // private key.
                                    KeyManagerFactory keymanagerfactory = KeyManagerFactory.getInstance("SunX509");
                                    keymanagerfactory.init(keystore, archPassword);
                                    KeyManager [] arkeymanager = keymanagerfactory.getKeyManagers();
                                    // Create trust manager.  The trust manager hold other peers‘
                                    // certificates.
                                    TrustManagerFactory trustmanagerfactory = TrustManagerFactory.getInstance("SunX509");
                                    trustmanagerfactory.init(keystore);
                                    TrustManager [] artrustmanager = trustmanagerfactory.getTrustManagers();
                                    // Create SSL context.
                                    SSLContext sslcontext = SSLContext.getInstance("SSL");
                                    SecureRandom securerandom = SecureRandom.getInstance("SHA1PRNG");
                                    sslcontext.init(arkeymanager, artrustmanager, securerandom);
                                    // Create factories.
                                    m_socketfactory = sslcontext.getSocketFactory();
                                    m_serversocketfactory = sslcontext.getServerSocketFactory();
                                    m_keystore = keystore;