(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 <C_CkScMinidriver.h>

void ChilkatSample(void)
    {
    HCkScMinidriver scmd;
    const char *readerName;
    BOOL success;
    const char *currentPin;
    const char *newPin;
    int retval;

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

    scmd = CkScMinidriver_Create();

    // Reader names (smart card readers or USB tokens) can be discovered
    // via List Readers or Find Smart Cards
    readerName = "Alcor Micro USB Smart Card Reader 0";
    success = CkScMinidriver_AcquireContext(scmd,readerName);
    if (success == FALSE) {
        printf("%s\n",CkScMinidriver_lastErrorText(scmd));
        CkScMinidriver_Dispose(scmd);
        return;
    }

    // If successful, the name of the currently inserted smart card is available:
    printf("Card name: %s\n",CkScMinidriver_cardName(scmd));

    // Change the "user" PIN.  (Typically, you'll always be using the "user" PIN.)
    currentPin = "0000";
    newPin = "1234";
    retval = CkScMinidriver_PinChange(scmd,"user",currentPin,newPin);
    if (retval == -1) {
        printf("The PIN is already blocked.\n");
        CkScMinidriver_Dispose(scmd);
        return;
    }

    if (retval == -2) {
        printf("The PinChange function failed for some unanticipated reason\n");
        printf("%s\n",CkScMinidriver_lastErrorText(scmd));
        CkScMinidriver_Dispose(scmd);
        return;
    }

    if (retval == 0) {
        printf("PIN successfully changed.\n");
    }
    else {
        printf("Current PIN is incorrect.\n");
        printf("Number of attempts remaining = %d\n",retval);
    }

    CkScMinidriver_DeleteContext(scmd);


    CkScMinidriver_Dispose(scmd);

    }