Dart

AddDetachedSignaturePk

See more MIME Examples

Demonstrates how to add a detached signature using a certifcate and it's corresponding private key. The easiest way of doing it is when both the certificate and private key are contained together within a PFX (.pfx or .p12) file. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final mime = CkMime();

  // Load the certificate from a .cer file.
  final cert = CkCert();
  try {
    cert.loadFromFile('aaworkarea/myCert.cer');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Load the private key from an encrypted PEM file.
  // (A private key can be loaded from other file formats also..)
  final privKey = CkPrivateKey();
  try {
    privKey.loadEncryptedPemFile('aaworkarea/myPrivateKey.pem', 'myPassword');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  mime.setBodyFromPlainText('This is the plain-text MIME body.');

  // Sign the MIME (adds a PKCS7 detached signature)
  try {
    mime.addDetachedSignaturePk(cert, privKey);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Save the S/MIME to a file.
  try {
    mime.saveMime('aaworkarea/signedMime.txt');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('success!');
}