Dart Requires Chilkat v10.1.2+

Using WS_FTP Self-signed Certificate file (.crt) and Private Key File. (.key)

See more FTP Examples

Demonstrates how to use a self-signed certificate created by WS_FTP with Chilkat FTP2.

Note: It is usually not necessary for the FTP client to use a client-side certificate. Most FTP servers using SSL and TLS connections (explicit or implicit) do not require client-side certs. In addition, some high-security FTP servers require "real" certificates -- meaning certificates issued by a real certificate authority with a chain of authentication that leads to a trusted root certificate. The certificates created by WS_FTP are self-signed and untrusted.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // Important:  Before running this program, convert your
  // .crt and .key files to a .p12 using OpenSSL:
  // The command is this:
  // openssl pkcs12 -export -in test.crt -inkey test.key -out test.p12
  // 

  final ftp = CkFtp2();

  ftp.hostname = 'ftp.example.com';
  ftp.port = 21;
  ftp.username = 'testLogin';
  ftp.password = 'testPassword';

  // This example will use explict TLS/SSL.
  // Establish an explicit secure channel after connection
  // on the standard FTP port 21.
  ftp.authTls = true;

  // The Ssl property is for establishing an implicit SSL connection
  // on port 990.  Because this example uses explicit SSL, it 
  // should remain false.
  ftp.ssl = false;

  // Create an instance of a certificate store object, load a .p12 file,
  // locate the certificate we need, and use it for signing.
  // (a P12/PFX file may contain more than one certificate.)
  final certStore = CkCertStore();
  // The 1st argument is the filename, the 2nd arg is the 
  // .p12 file's password.  (OpenSSL will prompty you to set a password
  // when converting the .crt and .key into a .p12).
  try {
    certStore.loadPfxFile('test.p12', 'secret');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final jsonCN = CkJsonObject();
  jsonCN.updateString('CN', 'cert common name');

  final cert = CkCert();
  try {
    certStore.findCert(jsonCN, cert);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  ftp.setSslClientCert(cert);

  // Connect and login to the FTP server.
  try {
    ftp.connect();
    // LastErrorText contains information even when
    // successful. This allows you to visually verify
    // that the secure connection actually occurred.
    print(ftp.lastErrorText);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Secure FTP Channel Established!');
  print(ftp.lastErrorText);

  // Do whatever you're doing to do ...
  // upload files, download files, etc...

  // ...
  // ...

  ftp.disconnect();
}