Dart

Create CAdES-BES .p7m using Smart Card or USB Token

See more Digital Signatures Examples

Demonstrates how to create a CAdES BES invoice.xml.p7m using a certificate stored on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.77 and at the time of this writing is restricted to the Windows operating system.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Note: Requires Chilkat v9.5.0.77 or greater.

  // This requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final crypt = CkCrypt2();

  // Use a certificate on a smartcard or USB token.
  final cert = CkCert();
  // Load the certificate on the smartcard currently in the reader (or on the USB token).
  // Pass an empty string to allow Chilkat to automatically choose the CSP (Cryptographi Service Provider).
  // See Load Certificate on Smartcard for information about explicitly selecting a particular CSP.
  try {
    cert.loadFromSmartcard('');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Provide the smartcard PIN.
  // If the PIN is not explicitly provided here, the Windows OS should
  // display a dialog for the PIN.
  cert.smartCardPin = '000000';

  // Provide the certificate for signing.
  try {
    crypt.setSigningCert(cert);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Indicate that SHA-256 should be used.
  crypt.hashAlgorithm = 'sha256';

  // Specify the signed attributes to be included.
  // (This is what makes it CAdES-BES compliant.)
  final jsonSignedAttrs = CkJsonObject();
  jsonSignedAttrs.updateInt('contentType', 1);
  jsonSignedAttrs.updateInt('signingTime', 1);
  jsonSignedAttrs.updateInt('messageDigest', 1);
  jsonSignedAttrs.updateInt('signingCertificateV2', 1);
  crypt.signingAttributes = jsonSignedAttrs.emit();

  final inFile = 'qa_data/xml/IT01234567890_11002.xml';
  final sigFile = 'qa_output/IT01234567890_11002.xml.p7m';

  // Create the CAdES-BES signature, which contains the original data.
  try {
    crypt.createP7M(inFile, sigFile);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Success.');
}