Dart

Send Encrypted Email using Certificate in Apple Keychain

See more Apple Keychain Examples

Send encrypted (S/MIME) email using a certificate found in the Apple Keychain.

Note: This example requires Chilkat v10.1.2 or later.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final email = CkEmail();
  email.subject = 'This email is encrypted';
  email.body = 'This is a S/MIME encrypted mail';
  email.from = 'Joe <joe@example.com>';

  // Emails are encrypted using the recipient's certificate.
  final recipientEmailAddr = 'jane@example2.com';
  email.addTo('', recipientEmailAddr);

  // Indicate that the email is to be sent encrypted.
  email.sendEncrypted = true;

  final cert = CkCert();

  // -----------------------------------------------
  // This example requires Chilkat v10.1.2 or later.
  // -----------------------------------------------

  // The recipient's certificate is used to encrypt.
  // This will load the certificate from the Apple Keychain.
  try {
    cert.loadByEmailAddress(recipientEmailAddr);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Specify the certificate to be used for encryption.
  email.setEncryptCert(cert);
  email.sendEncrypted = true;

  final mailman = CkMailMan();
  mailman.smtpHost = 'smtp.example.com';
  mailman.smtpUsername = 'joe@example.com';
  mailman.smtpPort = 587;
  mailman.startTLS = true;

  // We'll get the SMTP password from the Apple Keychain.
  // See how we originally saved the email credentials to the Keychain here:
  // Save Email Credentials in Apple Keychain or Windows Credentials Manager
  final secrets = CkSecrets();

  // On Windows, this is the Windows Credentials Manager
  // On MacOS/iOS, it is the Apple Keychain
  secrets.location = 'local_manager';

  // Specify the name of the secret.
  // service and username are required.
  // appName and domain are optional.
  // Note: The values are arbitrary and can be anything you want.
  final json = CkJsonObject();
  json.updateString('appName', 'MyEmailApp');
  json.updateString('service', 'SMTP');
  json.updateString('domain', 'example.com');
  json.updateString('username', 'joe@example.com');

  mailman.smtpPassword = secrets.getSecretStr(json);

  // Send the encrypted email.
  // The email is encrypted and sent within the SendEmail function.
  try {
    mailman.sendEmail(email);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Encrypted email sent!');
}