Dart

Use a PFX TLS Client Certificate

Demonstrates the Chilkat MailMan.SetSslClientCertPfx method, which sets the client-side certificate for SSL/TLS connections, loading it from a PFX/PKCS#12 file. The first argument is the path to the PFX file and the second is its password. This example loads a client certificate directly from a PFX.

Background: This is the convenience form of SetSslClientCert: rather than loading a Cert object first, you point straight at the PFX file and password. A PFX (PKCS#12) bundles the certificate with its private key — exactly what mutual TLS requires, since the client must prove possession of the key during the handshake. It is the usual client-credential format on Windows.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  var success = false;

  // Demonstrates the MailMan.SetSslClientCertPfx method, which sets the client-side
  // certificate for SSL/TLS connections, loading it from a PFX/PKCS#12 file.  The 1st argument
  // is the PFX path and the 2nd is the PFX password.

  final mailman = CkMailMan();

  // Configure the SMTP server connection.
  mailman.smtpHost = 'smtp.example.com';
  mailman.smtpPort = 465;
  mailman.smtpSsl = true;
  mailman.smtpUsername = 'user@example.com';
  mailman.smtpPassword = 'myPassword';

  // Load the client certificate directly from a PFX file.
  try {
    mailman.setSslClientCertPfx('qa_data/certs/client.pfx', 'pfx_password');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  success = mailman.verifySmtpLogin();
  if (!success) {
    print(mailman.lastErrorText);
    return;
  }

  print('Connected using a PFX TLS client certificate.');

  // Note: The path "qa_data/certs/client.pfx" is a relative local filesystem path,
  // relative to the current working directory of the running application.
}