Dart

CAdES BES Detached Signature

See more Encryption Examples

Demonstrates how to create a CAdES BES detached signature file (.p7s). 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 crypt = CkCrypt2();

  // Use a digital certificate and private key from a PFX file (.pfx or .p12).
  final pfxPath = '/Users/chilkat/testData/pfx/acme.pfx';
  final pfxPassword = 'test123';

  final cert = CkCert();
  try {
    cert.loadPfxFile(pfxPath, pfxPassword);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Tell the crypt component to use this cert.
  try {
    crypt.setSigningCert(cert);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The CadesEnabled property applies to all methods that create PKCS7 signatures. 
  // To create a CAdES-BES signature, set this property equal to true. 
  crypt.cadesEnabled = true;

  // We can sign any type of file, creating a .p7s as output:
  final inFile = '/Users/chilkat/testData/pdf/sample.pdf';
  final sigFile = '/Users/chilkat/testData/p7s/sample.p7s';

  // Create the detached CAdES-BES signature:
  try {
    crypt.createP7S(inFile, sigFile);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    crypt.verifyP7S(inFile, sigFile);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Success!');
}