public static (bool Success, string Report) GetUid(IContextFactory contextFactory, string readerName)
{
try
{
using (var ctx = contextFactory.Establish(SCardScope.System))
{
using (var rfidReader = new SCardReader(ctx))
{
try
{
var rc = rfidReader.SetAttrib(SCardAttribute.AsyncProtocolTypes, new[] { (byte)1 }); //
var sc = rfidReader.Connect(readerName, SCardShareMode.Shared, SCardProtocol.Any);
if (sc != SCardError.Success)
{
return(false, SCardHelper.StringifyError(sc));
}
else
{
var apdu = new CommandApdu(IsoCase.Case2Short, rfidReader.ActiveProtocol)
{
CLA = 0xFF,
Instruction = InstructionCode.GetData,
P1 = 0x00,
P2 = 0x00,
Le = 0 // We don't know the ID tag size
};
sc = rfidReader.BeginTransaction();
if (sc != SCardError.Success)
{
return(false, "Could not begin transaction.");
}
else
{
var receiveBuffer = new byte[256];
sc = rfidReader.Transmit(
SCardPCI.GetPci(rfidReader.ActiveProtocol), // Protocol Control Information (T0, T1 or Raw)
apdu.ToArray(), // command APDU
new SCardPCI(), // returning Protocol Control Information
ref receiveBuffer); // data buffer
if (sc != SCardError.Success)
{
return(false, SCardHelper.StringifyError(sc));
}
var responseApdu = new ResponseApdu(receiveBuffer, IsoCase.Case2Short, rfidReader.ActiveProtocol);
if (responseApdu.HasData)
{
if (!(responseApdu.SW1 == 0x90 && responseApdu.SW2 == 0))
{
return(false, "Not 90-00");
}
var uid = responseApdu.GetData();
return(true, BitConverter.ToString(uid).Replace("-", ""));
}
else
{
return(false, "ResponseApdu has no data");
}
}
}
}
catch (Exception ex) { return(false, ex.Message); }
finally
{
rfidReader.EndTransaction(SCardReaderDisposition.Leave);
rfidReader.Disconnect(SCardReaderDisposition.Reset);
}
}
}
}
catch (Exception ex) { return(false, ex.Message); }
}