Dart

ScMinidriver - Find and Load Certificate from Smart Card or USB Token

See more ScMinidriver Examples

Demonstrates how to find and load a specific certificate located on a smart card or USB token. Dart

import 'package:chilkat/chilkat.dart';

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

  final scmd = CkScMinidriver();

  // Reader names (smart card readers or USB tokens) can be discovered
  // via List Readers or Find Smart Cards
  final readerName = 'SCM Microsystems Inc. SCR33x USB Smart Card Reader 0';
  try {
    scmd.acquireContext(readerName);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // If successful, the name of the currently inserted smart card is available:
  print('Card name: ${scmd.cardName}');

  // If desired, perform regular PIN authentication with the smartcard.
  // For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
  final retval = scmd.pinAuthenticate('user', '000000');
  if (retval != 0) {
    print('PIN Authentication failed.');
  }

  // You can find a cerficate using any of the following certificate parts:
  // "subjectDN" -- The full distinguished name of the cert.
  // "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
  // "subjectCN" -- The common name part (CN) of the certificate's subject.
  // "serial" -- The certificate serial number.
  // "serial:issuerCN" -- The certificate serial number + the issuer's common name, delimited with a colon char.
  // These are the same certificate parts that can be retrieved by listing certificates on the smart card (or USB token).
  // See List Certificates on Smart Card Example
  final certPart = 'subjectCN';
  final partValue = 'PIVKey E42D60A759D39147A26E0AF2FB1183C5';

  // If the certificate is found, it is loaded into the cert object.
  final cert = CkCert();
  try {
    scmd.findCert(certPart, partValue, cert);
    print('Successfully loaded the cert object from the smart card / USB token.');

    // Note: When successful, the cert object is internally linked to the ScMinidriver object's authenticated session.
    // The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.
    // If your application calls PinDeauthenticate or DeleteContext, the cert will no longer be able to sign on the smart card
    // because the smart card ScMinidriver session will no longer be authenticated or deleted.
  } on ChilkatException {
    print('Failed to find the certificate.');
  }

  // ...
  // ...
  // ...

  // When finished with operations that required authentication, you may if you wish, deauthenticate the session.
  try {
    scmd.pinDeauthenticate('user');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }

  // Delete the context when finished with the card.
  try {
    scmd.deleteContext();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }
}