SSH Tunnel Authenticate with a SecureString Password and Private Key

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Demonstrates the Chilkat SshTunnel.AuthenticateSecPwPk method, which authenticates using SecureString login and password objects together with a private key. The third argument is the SshKey private key.

Note: The private-key path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own key file.

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    //  Demonstrates the SshTunnel.AuthenticateSecPwPk method, which authenticates using SecureString
    //  login and password objects together with a private key.  The 1st argument is the username, the
    //  2nd is the password, and the 3rd is an SshKey private key.

    CkSshTunnel tunnel = new CkSshTunnel();

    //  The tunnel forwards accepted local connections to this destination through the SSH server.
    tunnel.put_DestHostname("db.internal.example.com");
    tunnel.put_DestPort(5432);

    //  Connect to the SSH server.  This performs the TCP/proxy connection and SSH handshake, but
    //  does not authenticate yet.
    int sshPort = 22;
    success = tunnel.Connect("ssh.example.com",sshPort);
    if (success == false) {
        System.out.println(tunnel.lastErrorText());
        return;
        }

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    String password = "mySshPassword";

    //  Load the SSH private key.  LoadText reads the file's text, which is then imported.
    CkSshKey privKey = new CkSshKey();
    String keyText = privKey.loadText("qa_data/id_rsa");
    if (privKey.get_LastMethodSuccess() == false) {
        System.out.println(privKey.lastErrorText());
        return;
        }

    success = privKey.FromOpenSshPrivateKey(keyText);
    if (success == false) {
        System.out.println(privKey.lastErrorText());
        return;
        }

    //  Place the login and password into SecureString objects.
    CkSecureString secureLogin = new CkSecureString();
    secureLogin.Append("mySshLogin");
    CkSecureString securePassword = new CkSecureString();
    securePassword.Append(password);

    success = tunnel.AuthenticateSecPwPk(secureLogin,securePassword,privKey);
    if (success == false) {
        System.out.println(tunnel.lastErrorText());
        return;
        }

    System.out.println("Authenticated.");

    //  After authenticating, call BeginAccepting to start listening for local connections to forward.

    boolean waitForThreadExit = true;
    success = tunnel.CloseTunnel(waitForThreadExit);
    if (success == false) {
        System.out.println(tunnel.lastErrorText());
        return;
        }
  }
}