Dart

Add a PFX Source to MailMan for Decryption

Demonstrates the Chilkat MailMan.AddPfxSourceFile method, which adds a PFX/PKCS#12 file to the MailMan object's internal list of sources used for locating certificates and private keys — for example, to decrypt S/MIME email downloaded from the server. The second argument is the PFX password. This example configures a POP3 connection and registers a PFX source.

Background: When MailMan downloads an encrypted (S/MIME) message, it needs the recipient's private key to decrypt it. On Windows and macOS the OS certificate stores are searched automatically, but when the key lives in a standalone PFX file — common on Linux or in server deployments — AddPfxSourceFile tells MailMan where to find it. A PFX bundles the certificate and its private key in one password-protected file.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the MailMan.AddPfxSourceFile method, which adds a PFX/PKCS#12 file to the
  // MailMan object's internal list of sources used for locating certificates and private
  // keys (for example, to decrypt downloaded S/MIME email).  The 2nd argument is the PFX
  // password.

  final mailman = CkMailMan();

  // Configure the POP3 server connection.
  mailman.mailHost = 'pop.example.com';
  mailman.mailPort = 995;
  mailman.popSsl = true;
  mailman.popUsername = 'user@example.com';
  mailman.popPassword = 'myPassword';

  // Provide a PFX so that encrypted emails downloaded from the server can be decrypted.

  try {
    mailman.addPfxSourceFile('qa_data/certs/decryption.pfx', 'pfx_password');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Added the PFX certificate/private-key source.');

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