Set the FTP TLS Version and Ciphers

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Demonstrates the TLS negotiation properties SslProtocol and SslAllowedCiphers, and reads back the negotiated TlsVersion and TlsCipherSuite after connecting.

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    CkFtp2 ftp = new CkFtp2();

    ftp.put_Hostname("ftp.example.com");
    ftp.put_Username("myFtpLogin");

    ftp.put_AuthTls(true);

    //  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.
    ftp.put_Password("myPassword");

    //  Require at least TLS 1.2.  Accepted values include "default", "TLS 1.3", "TLS 1.2",
    //  "TLS 1.2 or higher", and so on.  "default" lets Chilkat negotiate the best available.
    ftp.put_SslProtocol("TLS 1.2 or higher");

    //  Optionally restrict the cipher suites offered.  Leave empty to use Chilkat's secure defaults.
    ftp.put_SslAllowedCiphers("TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256");

    success = ftp.Connect();
    if (success == false) {
        Log.i(TAG, ftp.lastErrorText());
        return;
        }

    //  After connecting, read back what was actually negotiated.
    Log.i(TAG, "Negotiated TLS version: " + ftp.tlsVersion());
    Log.i(TAG, "Negotiated cipher suite: " + ftp.tlsCipherSuite());

    success = ftp.Disconnect();
    if (success == false) {
        Log.i(TAG, ftp.lastErrorText());
        return;
        }


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}