SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

 Chilkat Java Library Downloads for Windows, Linux, and MAC OS X

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[])
  {
    //  Important: It is helpful to send the contents of the
    //  sftp.LastErrorText property when sending email
    //  to support@chilkatsoft.com

    CkSsh ssh = new CkSsh();

    //  Any string automatically begins a fully-functional 30-day trial.
    boolean success;
    success = ssh.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
    }

    //  Set some timeouts, in milliseconds:
    ssh.put_ConnectTimeoutMs(5000);
    ssh.put_IdleTimeoutMs(15000);

    //  Connect to the SSH server.
    //  The standard SSH port = 22
    //  The hostname may be a hostname or IP address.
    int port;
    String hostname;
    hostname = "www.my-ssh-server.com";
    port = 22;
    success = ssh.Connect(hostname,port);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
    }

    CkSshKey key = new CkSshKey();

    //  Load a private key from a PEM file:
    //  (Private keys may be loaded from OpenSSH and Putty formats.
    //  Both encrypted and unencrypted private key file formats
    //  are supported.  This example loads an unencrypted private
    //  key in OpenSSH format.  PuTTY keys typically use the .ppk
    //  file extension, while OpenSSH keys use the PEM format.
    String privKey;
    privKey = key.loadText("myPrivateKey.pem");
    if (privKey == null ) {
        System.out.println(key.lastErrorText());
        return;
    }

    //  (For PuTTY keys, call FromPuttyPrivateKey instead.)
    success = key.FromOpenSshPrivateKey(privKey);
    if (success != true) {
        System.out.println(key.lastErrorText());
        return;
    }

    //  Authenticate with the SSH server using the login and
    //  private key.  (The corresponding public key should've
    //  been installed on the SSH server beforehand.)
    success = ssh.AuthenticatePk("myLogin",key);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
    }

    System.out.println(ssh.lastErrorText());
    System.out.println("Public-Key Authentication Successful!");
  }
}