(Java) SSH Commands to Cisco Switch

Demonstrates how to establish an SSH session with a Cisco switch (or something similar) and send commands in a device console session.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

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[])
  {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSsh ssh = new CkSsh();

    boolean success = ssh.Connect("172.16.16.100",22);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Authenticate using login/password:
    success = ssh.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Start a shell session.
    int channelNum = ssh.QuickShell();
    if (channelNum < 0) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // If the CISCO switch returns a prompt with "#", then read until we get the prompt.
    // (It's not actually required that we do this, but it helps to know that all is OK at this point..)
    success = ssh.ChannelReceiveUntilMatch(channelNum,"#","utf-8",true);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Show what we received so far:
    System.out.println(ssh.getReceivedText(channelNum,"utf-8"));

    // Send a "show clock" command.
    success = ssh.ChannelSendString(channelNum,"show clock\n","utf-8");

    // Read the output to the next interactive prompt.
    success = ssh.ChannelReceiveUntilMatch(channelNum,"#","utf-8",true);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    System.out.println(ssh.getReceivedText(channelNum,"utf-8"));

    // Send another command and get the output, and so on...
    success = ssh.ChannelSendString(channelNum,"some other command\n","utf-8");
    success = ssh.ChannelReceiveUntilMatch(channelNum,"#","utf-8",true);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    System.out.println(ssh.getReceivedText(channelNum,"utf-8"));

    ssh.Disconnect();
  }
}