(C++) 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.

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#include <CkScMinidriver.h>

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

    CkScMinidriver scmd;

    // Reader names (smart card readers or USB tokens) can be discovered
    // via List Readers or Find Smart Cards
    const char *readerName = "Alcor Micro USB Smart Card Reader 0";
    bool success = scmd.AcquireContext(readerName);
    if (success == false) {
        std::cout << scmd.lastErrorText() << "\r\n";
        return;
    }

    // If successful, the name of the currently inserted smart card is available:
    std::cout << "Card name: " << scmd.cardName() << "\r\n";

    // Change the "user" PIN.  (Typically, you'll always be using the "user" PIN.)
    const char *currentPin = "0000";
    const char *newPin = "1234";
    int retval = scmd.PinChange("user",currentPin,newPin);
    if (retval == -1) {
        std::cout << "The PIN is already blocked." << "\r\n";
        return;
    }

    if (retval == -2) {
        std::cout << "The PinChange function failed for some unanticipated reason" << "\r\n";
        std::cout << scmd.lastErrorText() << "\r\n";
        return;
    }

    if (retval == 0) {
        std::cout << "PIN successfully changed." << "\r\n";
    }
    else {
        std::cout << "Current PIN is incorrect." << "\r\n";
        std::cout << "Number of attempts remaining = " << retval << "\r\n";
    }

    scmd.DeleteContext();
    }