windows - 使用 WinSCard 获取 PCSC 读卡器序列号

Question

如果读卡器中没有卡，我在获取 PCSC 读卡器序列号时遇到问题。我正在使用winscard.dll 和c++。

以下代码仅适用于读卡器中存在卡的情况。否则，不会检索 SCardHandle。我还没有找到任何其他方式来获取 SCardHandle。

SCARDHANDLE hCardHandle;
SCARDCONTEXT    hSC;
WCHAR   pCardReaderName[256];
LONG lReturn;

lReturn = SCardEstablishContext(SCARD_SCOPE_USER, 0, 0, &hSC);

if (lReturn != SCARD_S_SUCCESS)
{
    Console::WriteLine("SCardEstablishContext() failed\n");
    return;
}

my_select_reader(hSC, pCardReaderName); // just shows reader names in console and requires you to pick one

// connect to smart card
DWORD   dwAP;

lReturn = SCardConnect( hSC,
                (LPCWSTR)pCardReaderName,
                SCARD_SHARE_SHARED,
                SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1 | SCARD_PROTOCOL_RAW,
                &hCardHandle,
                &dwAP );

if ( SCARD_S_SUCCESS != lReturn )
{
    Console::WriteLine("Failed SCardConnect\n");
    exit(1);  // Or other appropriate action.
}

// get reader serial no
LPBYTE   pbAtr = NULL;
DWORD    cByte = SCARD_AUTOALLOCATE;

lReturn = SCardGetAttrib(hCardHandle,
                SCARD_ATTR_VENDOR_IFD_SERIAL_NO,
                (LPBYTE)&pbAtr,
                &cByte);

if ( SCARD_S_SUCCESS != lReturn )
{
    Console::WriteLine("Failed to retrieve Reader Serial\n");
    exit(1);  // Or other appropriate action.
}

printf("serial no: %s", pbAtr);

SCardFreeMemory(hCardHandle, pbAtr); 

有没有办法在不连接卡的情况下获取读卡器序列号？

Answer 1

也许我有点晚了 - 但无论如何......

您可以使用 SCardConnect 的 SCARD_SHARE_DIRECT 标志直接连接到读卡器。至少对我们来说这工作得很好..(我们使用协议(protocol)标志“0x00”)