Decrypt S/MIME using a Certificate with Private Key Access

See more MIME Examples

Loads a CMS/PKCS #7 encrypted S/MIME message and decrypts it back to the original MIME content.

DecryptUsingCert takes a single certificate that already has access to its associated private key, for example a certificate loaded from a PFX.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

import 'package:chilkat/chilkat.dart';

void main() {
  final mime = CkMime();
  try {
    mime.loadMimeFile('qa_data/encrypted.eml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Decrypt using a certificate that already provides access to its private key (for example loaded
  // from a PFX).  The only argument is the certificate.
  final pfxPassword = 'myPfxPassword';
  final cert = CkCert();
  try {
    cert.loadPfxFile('qa_data/recipient.pfx', pfxPassword);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    mime.decryptUsingCert(cert);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final String body;
  try {
    body = mime.getBodyDecoded();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(body);
}