(C) PC/SC Get Card UID

See more SCard Examples

Sends the APDU command to get a card's UID.

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#include <C_CkSCard.h>
#include <C_CkBinData.h>

void ChilkatSample(void)
    {
    HCkSCard scard;
    BOOL success;
    HCkBinData bdRecv;
    int numBytes;

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

    scard = CkSCard_Create();

    // First establish a context to the PC/SC Resource Manager
    success = CkSCard_EstablishContext(scard,"user");
    if (success == FALSE) {
        printf("%s\n",CkSCard_lastErrorText(scard));
        CkSCard_Dispose(scard);
        return;
    }

    // Use your own smart card reader name here.
    success = CkSCard_Connect(scard,"ACS ACR122 0","shared","no_preference");
    if (success == FALSE) {
        printf("%s\n",CkSCard_lastErrorText(scard));
        CkSCard_Dispose(scard);
        return;
    }

    printf("Connected reader: %s\n",CkSCard_connectedReader(scard));
    printf("Active protocol: %s\n",CkSCard_activeProtocol(scard));
    printf("ATR: %s\n",CkSCard_cardAtr(scard));
    printf("Reader Status: %s\n",CkSCard_readerStatus(scard));

    //  Send the APDU command 0xFF, 0xCA, 0x00, 0x00, 0x00
    bdRecv = CkBinData_Create();
    success = CkSCard_TransmitHex(scard,CkSCard_activeProtocol(scard),"FFCA000000",bdRecv,32);
    if (success == TRUE) {

        printf("Received: %s\n",CkBinData_getEncoded(bdRecv,"hex"));

        // The UID is the returned data without the final 2 bytes.
        numBytes = CkBinData_getNumBytes(bdRecv);
        if (numBytes > 2) {
            printf("UID: %s\n",CkBinData_getEncodedChunk(bdRecv,0,numBytes - 2,"hex"));
        }

    }
    else {
        printf("%s\n",CkSCard_lastErrorText(scard));
    }

    // Disconnect from this reader.
    success = CkSCard_Disconnect(scard,"leave");
    if (success == FALSE) {
        printf("%s\n",CkSCard_lastErrorText(scard));
    }

    // Applications should always release the context when finished.
    success = CkSCard_ReleaseContext(scard);
    if (success == FALSE) {
        printf("%s\n",CkSCard_lastErrorText(scard));
    }



    CkSCard_Dispose(scard);
    CkBinData_Dispose(bdRecv);

    }