(Java) SFTP use Cert's Private Key for Authentication (Windows)

Demonstrates how to use the private key of a pre-installed certificate (on Windows) for SFTP authentication. The certificate's private key must be marked as "exportable" when originally installed.

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.

    CkCert cert = new CkCert();

    // Load the certificate from the Windows certificate store
    boolean success = cert.LoadByCommonName("my_cert_common_name");
    if (success == false) {
        System.out.println(cert.lastErrorText());
        return;
        }

    // Get the private key.  
    CkPrivateKey privKey = cert.ExportPrivateKey();
    if (cert.get_LastMethodSuccess() == false) {
        System.out.println(cert.lastErrorText());
        return;
        }

    String privKeyPem = privKey.getPkcs8Pem();
    if (privKey.get_LastMethodSuccess() == false) {
        System.out.println(privKey.lastErrorText());
        return;
        }

    CkSshKey sshKey = new CkSshKey();
    success = sshKey.FromOpenSshPrivateKey(privKeyPem);
    if (success == false) {
        System.out.println(sshKey.lastErrorText());
        return;
        }

    // Connect to an SSH/SFTP server
    CkSFtp sftp = new CkSFtp();
    success = sftp.Connect("sftp.example.com",22);
    if (success == false) {
        System.out.println(sftp.lastErrorText());
        return;
        }

    // Authenticate with the SSH server using a username + private key.
    // (The private key serves as the password.  The username identifies
    // the SSH user account on the server.)
    success = sftp.AuthenticatePk("mySshLogin",sshKey);
    if (success == false) {
        System.out.println(sftp.lastErrorText());
        return;
        }

    System.out.println("OK, the connection and authentication with the SSH server is completed.");

    // This example is only to show the connection + authentication using a private key associated with a certificate in the Windows certificate store...
  }
}