Dart

Load .eml and Decrypt (smime.p7m)

Loads an encrypted email from a .eml file and decrypts using certificate w/ private key found in a .p12 (or .pfx) file.

The Content-Type and Content-Disposition email headers of the email to be decrypted look similar to this:

Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data;
	name="smime.p7m"
Content-Disposition: attachment; filename="smime.p7m"

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final email = CkEmail();

  // Add a PFX (or .p12) to be used for decryption
  try {
    email.addPfxSourceFile('myCert.p12', 'passwordForP12');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Loading the .eml automatically decrypts.
  try {
    email.loadEml('encrypted.eml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The email now exists as it was prior to encryption.
  // Your app may access the email's subject, body, attachments,
  // etc. using the Chilkat Email API...

  // Save the decrypted email:
  try {
    email.saveEml('decrypted.eml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Success.');
}