Java

ScMinidriver - Change Smart Card PIN (or USB token PIN)

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Demonstrates how to change the PIN for a smart card or USB token. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

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

    CkScMinidriver scmd = new CkScMinidriver();

    // Reader names (smart card readers or USB tokens) can be discovered
    // via List Readers or Find Smart Cards
    String readerName = "Alcor Micro USB Smart Card Reader 0";
    success = scmd.AcquireContext(readerName);
    if (success == false) {
        System.out.println(scmd.lastErrorText());
        return;
        }

    // If successful, the name of the currently inserted smart card is available:
    System.out.println("Card name: " + scmd.cardName());

    // Change the "user" PIN.  (Typically, you'll always be using the "user" PIN.)
    String currentPin = "0000";
    String newPin = "1234";
    int retval = scmd.PinChange("user",currentPin,newPin);
    if (retval == -1) {
        System.out.println("The PIN is already blocked.");
        return;
        }

    if (retval == -2) {
        System.out.println("The PinChange function failed for some unanticipated reason");
        System.out.println(scmd.lastErrorText());
        return;
        }

    if (retval == 0) {
        System.out.println("PIN successfully changed.");
        }
    else {
        System.out.println("Current PIN is incorrect.");
        System.out.println("Number of attempts remaining = " + retval);
        }

    scmd.DeleteContext();
  }
}