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c++smartcardapdu

get APDU request error c++

So .. I have pcsc-reader, smartcard and c++ code. Find readers, chose them, connect and get ATR - working greatfull.

but after ATR-get i need to get APDU request, this code

SCARD_IO_REQUEST ioRecv;
byte  pbRecvBuffer[255]; 
int pbRecvLength=255;
byte   pbSendBuffer[] ={ 0x00, 0xb0, 0x00, 0x00}; //any comand
int cbSendLength = sizeof(pbSendBuffer);//size of comand
ioRecv.cbPciLength = 255;
DWORD  dwSize=255; 

//our Transmit those return error
lReturn = SCardTransmit(hSC,
                        (LPCSCARD_IO_REQUEST)dwAP,
                        pbSendBuffer,
                cbSendLength,
                        NULL,
                        pbRecvBuffer,
                        &dwSize);

if(lReturn==SCARD_S_SUCCESS){
//do smt with pbRecvBuffer   
printf("success");
}
else {
    printf("error "); 
}

always return "error"... If you could help me or point out my error, I would be very grateful.

Thank you

Solution

  • Error was found in first param of SCardTransmit() - According to the description of MSDN in SCardTransmit () does not need to pass a hSC. so have to pass m_hCardHandle received from SCardConnect (). also it wrong to pass (LPCSCARD_IO_REQUEST)dwAP

    yap. It have solve the problem