Unicode C

PC/SC Get Card UID

See more SCard Examples

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

#include <C_CkSCardW.h>
#include <C_CkBinDataW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkSCardW scard;
    HCkBinDataW bdRecv;
    int numBytes;

    success = FALSE;

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

    scard = CkSCardW_Create();

    // First establish a context to the PC/SC Resource Manager
    success = CkSCardW_EstablishContext(scard,L"user");
    if (success == FALSE) {
        wprintf(L"%s\n",CkSCardW_lastErrorText(scard));
        CkSCardW_Dispose(scard);
        return;
    }

    // Use your own smart card reader name here.
    success = CkSCardW_Connect(scard,L"ACS ACR122 0",L"shared",L"no_preference");
    if (success == FALSE) {
        wprintf(L"%s\n",CkSCardW_lastErrorText(scard));
        CkSCardW_Dispose(scard);
        return;
    }

    wprintf(L"Connected reader: %s\n",CkSCardW_connectedReader(scard));
    wprintf(L"Active protocol: %s\n",CkSCardW_activeProtocol(scard));
    wprintf(L"ATR: %s\n",CkSCardW_cardAtr(scard));
    wprintf(L"Reader Status: %s\n",CkSCardW_readerStatus(scard));

    //  Send the APDU command 0xFF, 0xCA, 0x00, 0x00, 0x00
    bdRecv = CkBinDataW_Create();
    success = CkSCardW_TransmitHex(scard,CkSCardW_activeProtocol(scard),L"FFCA000000",bdRecv,32);
    if (success == TRUE) {

        wprintf(L"Received: %s\n",CkBinDataW_getEncoded(bdRecv,L"hex"));

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

    }
    else {
        wprintf(L"%s\n",CkSCardW_lastErrorText(scard));
    }

    // Disconnect from this reader.
    success = CkSCardW_Disconnect(scard,L"leave");
    if (success == FALSE) {
        wprintf(L"%s\n",CkSCardW_lastErrorText(scard));
    }

    // Applications should always release the context when finished.
    success = CkSCardW_ReleaseContext(scard);
    if (success == FALSE) {
        wprintf(L"%s\n",CkSCardW_lastErrorText(scard));
    }



    CkSCardW_Dispose(scard);
    CkBinDataW_Dispose(bdRecv);

    }