Java

SSH Authenticate with Password and Private Key

Demonstrates the Chilkat Ssh.AuthenticatePwPk method, which authenticates with a server that requires both a password and a private key. The first argument is the username, the second is the password, and the third is an SshKey private key.

Note: The private-key path is relative to the application's current working directory. Supply the path to your own key file.

Background: Most servers require either a password or a public key, not both — but some high-security configurations mandate multi-factor SSH, combining something you know (the password) with something you have (the key). This method satisfies that policy in one call. As always, the password should come from a secure source rather than a literal in code.

Chilkat Java Downloads

Download Chilkat for Java

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Ssh;
import com.chilkatsoft.chilkat2.SshKey;

public class ChilkatExample {

    public static void main(String[] args) {
        // Demonstrates the Ssh.AuthenticatePwPk method, which authenticates with a server that requires
        // BOTH a password and a private key.  The 1st argument is the username, the 2nd is the
        // password, and the 3rd is an SshKey private key.

        Ssh ssh = new Ssh();

        // Connect to the SSH server.  Port 22 is the usual SSH port.
        int sshPort = 22;
        try {
            ssh.connect("ssh.example.com", sshPort);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            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.
        SshKey privKey = new SshKey();
        String keyStr;
        try {
            keyStr = privKey.loadText("qa_data/id_rsa");

            privKey.fromOpenSshPrivateKey(keyStr);

            ssh.authenticatePwPk("mySshLogin", password, privKey);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Authenticated with password and private key.");

        ssh.disconnect();
    }
}