Dart

S/MIME Encrypt using Certificate in Apple Keychain

See more Apple Keychain Examples

Encrypts MIME to creates S/MIME using a certificate found in the Apple Keychain. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final cert = CkCert();

  // Load the certificate by the Subject Common Name
  // On MacOS and iOS, Chilkat will search the Keychain(s) for the matching certificate.
  try {
    cert.loadByCommonName('My Cert');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Note: The private key is not needed for encryption.
  // Only the certificate is needed.

  // Create a simple MIME message to encrypt.
  final mime = CkMime();
  mime.addHeaderField('Subject', 'test');
  mime.addHeaderField('SomeHeader', '123');
  mime.addHeaderField('Content-Type', 'text/plain');
  mime.setBody('This is the body.');

  print(mime.getMime());
  print('----');

  // Here's the MIME to be encrypted:

  // Subject: test
  // SomeHeader: 123
  // Content-Type: text/plain
  // 
  // This is the body.

  // -------------------------------------
  // Encrypt the MIME.
  try {
    mime.encrypt(cert);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Show the encrypted MIME (S/MIME)
  print(mime.getMime());

  // Save the encrypted MIME to a file.
  mime.saveMime('./encrypted.mime');

  // Here's the S/MIME

  // Subject: test
  // SomeHeader: 123
  // Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
  // Content-Disposition: attachment; filename="smime.p7m"
  // Content-Transfer-Encoding: base64
  // 
  // MIICSwYJKoZIhvcNAQcDoIICPDCCAjgCAQAxggGzMIIBrwIBADCBljCBgTELMAkGA1UEBhMCSVQx
  // EDAOBgNVBAgMB0JlcmdhbW8xGTAXBgNVBAcMEFBvbnRlIFNhbiBQaWV0cm8xFzAVBgNVBAoMDkFj
  // dGFsaXMgUy5wLkEuMSwwKgYDVQQDDCNBY3RhbGlzIENsaWVudCBBdXRoZW50aWNhdGlvbiBDQSBH
  // MwIQPCWvkSv8oQ7xRmEHJ6TzEDANBgkqhkiG9w0BAQEFAASCAQB3VZvHRE5EWxug7Sckpcz1ucDZ
  // YiTKiqmyPt75MhzNRQLtKFx/jWwlemUwnPMzeu6yutCkZ74Bdn7MBsfDqV3bUz43wAu+fRBteGvF
  // mTc00MfY8L7o8dkpj4AqAOCj4hKQzbSE99GvSzyXcPE2Gm5NrOPtKxqfFqbBRTCb4fBZP84LaL+x
  // rnYfrM4qXTppixyN8iFYCd4maEbMu/GA5o+j0BkDDnx42pILDoAGV/ERyx55Y3Nc2Mhm/cITBMNn
  // g7uS9KPrlYizNaqVu09Hi9jg4gdZaRiTjUqg05tSOk/YqIQxTgfscwSPY92/ewpI6e1EHtLt8Q33
  // gWCbERptSntUMHwGCSqGSIb3DQEHATAdBglghkgBZQMEAQIEENm1AxeXlEMx7p6McjHIj5CAUEQj
  // 0GuJ5LnTqiqIjOiwmwNidl1N1TRluxX5vAQvwBuYE6bQK4+i04yn2Av3cucW4kvxgP2Nmni+XgQt
  // aPPKlasaVceEeZ15IYjw77/m3YYn
}