Dart

ScMinidriver - Get Public Keys from Smart Card Key Container

See more ScMinidriver Examples

Demonstrates how to query a key container on a smart card (or USB token) to get the public part of the private keys that are present. A key container can hold two separate private keys -- one in the "signature" position, and the other in the "key exchange" position. 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.

  // Chilkat recommends the following free tool for interactively examining the contents of your smart card
  // through the ScMinidriver interface:  MGTEK Tool for Minidriver enabled Smart Cards

  // Let's first look at our smart card..
  // Here's the view of our Gemalto (Thales) IDPrime MD T=0 smart card in the MGTEK tool:

  // (image:https://example-code.com/images/gemalto_idprime_after_key_import.JPG/endImage)

  final scmd = CkScMinidriver();

  // First we need to acquire a context to the smart card in the reader where it is inserted.
  // Reader names (smart card readers or USB tokens) can be discovered
  // via List Readers or Find Smart Cards
  final readerName = 'Alcor Micro 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}');

  // We likely shouldn't need to authenticate with the smart card (use a PIN) to simply get a public key,
  // so we can skip the PIN authenticatin step..

  // Let's get the key(s) present in Container #7.
  // In our case (shown in the image above), there is a private key in the "key exchange" position, but no key in the "signature" position.
  final pubkeySig = CkPublicKey();
  final pubkeyKex = CkPublicKey();

  try {
    scmd.getContainerKeys(7, pubkeySig, pubkeyKex);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  if (pubkeySig.empty) {
    print('No signature key is present.');
  } else {
    print('Signature key:');
    print(pubkeySig.getPem(true));
  }

  if (pubkeyKex.empty) {
    print('No Key Exchange key is present.');
  } else {
    print('Key Exchange key:');
    print(pubkeyKex.getPem(true));
  }

  scmd.deleteContext();

  print('Success.');

  // Here's the output of the above sample code:

  // Card name: IDPrime MD T=0
  // No signature key is present.
  // Key Exchange key:
  // -----BEGIN RSA PUBLIC KEY-----
  // MIIBCgKCAQEAsXeRhM55P13FbpNcXAMR3olbw2Wa6keZIHu5YTZYUBTlYWId+pNi
  // wUz3zFIEo+0IfYR0H27ybIycQO+1IIzJofUFNMAL3tZps2OKPlsjuCPls6kXpXhv
  // /gvhux8LrCtp4PcKWqJ6QVOZKChc7WAx40qFWzHi57ueqRTv3x0kESqGg/VjsqyT
  // Evb55psJO2RsfhLT7+YVh3hImRM3RDaJdkTkPuOxeFyT6N7VXD09329sLuS3QkUb
  // E9zEKDnz9X3d8dEQdJhSI9ba5fxl8R7fu8pB67ElfzFml96X1jLFtzy1pzOT5Fc4
  // ROcaqlYckVzdBq9sxezm6MYmDBjNAcibRwIDAQAB
  // -----END RSA PUBLIC KEY-----
}