public bool ConnectReader(string SelectedReader)
{
try
{
// Connect to selected reader
LastError = WinSCard.SCardConnect(
_context,
SelectedReader,
_shareMode,
_protocol,
ref _cardHandle,
ref activeProtocol);
if (!IsSuccess(LastError))
{
return(false);
}
return(true);
}
catch (Exception)
{
throw;
}
}
public bool ResetReader(
string SelectedReader,
out string ATR)
{
String atr_temp = "";
String s = "";
bool boRet = true;
ATR = atr_temp;
// Disconnect to with reset disposition
LastError = WinSCard.SCardDisconnect(
_cardHandle,
(int)SCardReaderDisposition.Reset);
if (!IsSuccess(LastError))
{
return(false);
}
// Connect to selected reader
if (!ConnectReader(SelectedReader))
{
return(false);
}
// Init readerState
SCARD_READERSTATE readerState = new SCARD_READERSTATE
{
RdrName = SelectedReader,
RdrCurrState = 0,
RdrEventState = 0,
UserData = "Card",
};
// Get Status Change
LastError = WinSCard.SCardGetStatusChange(
_context,
0,
ref readerState,
1);
if (!IsSuccess(LastError))
{
return(false);
}
StringBuilder hex = new StringBuilder(readerState.ATRValue.Length * 2);
foreach (byte b in readerState.ATRValue)
{
hex.AppendFormat("{0:X2}", b);
}
atr_temp = hex.ToString();
ATR = atr_temp;
return(boRet);
}
public bool ReleaseContext()
{
try
{
LastError = WinSCard.SCardReleaseContext(
_context);
if (!IsSuccess(LastError))
{
return(false);
}
return(true);
}
catch (Exception)
{
throw;
}
}
public bool DisconnectReader()
{
try
{
// Disconnect to selected Card Handle
LastError = WinSCard.SCardDisconnect(
_cardHandle,
(int)SCardReaderDisposition.Unpower);
if (!IsSuccess(LastError))
{
return(false);
}
return(true);
}
catch (Exception)
{
throw;
}
}
public bool EstablishContext()
{
try
{
LastError = WinSCard.SCardEstablishContext(
_scope,
IntPtr.Zero,
IntPtr.Zero,
out _context);
if (!IsSuccess(LastError))
{
return(false);
}
return(true);
}
catch (Exception)
{
throw;
}
}
public string SendAPDU(string sAPDU)
{
SCARD_IO_REQUEST sendRequest;
sendRequest.dwProtocol = (int)activeProtocol;
sendRequest.cbPciLength = 8;
SCARD_IO_REQUEST receiveRequest;
receiveRequest.cbPciLength = 8;
receiveRequest.dwProtocol = (int)activeProtocol;
byte[] abAPDU = new byte[300];
byte[] abResp = new byte[300];
UInt32 wLenSend = 0;
Int32 wLenRecv = 260;
sAPDU = Utility.RemoveNonHexa(sAPDU);
wLenSend = Utility.StrByteArrayToByteArray(sAPDU, ref abAPDU);
LastError = WinSCard.SCardTransmit(
_cardHandle,
ref sendRequest,
abAPDU,
(int)wLenSend,
ref receiveRequest,
abResp,
ref wLenRecv);
if (!IsSuccess(LastError))
{
return(String.Empty);
}
return(Utility.ByteArrayToStrByteArray(
abResp,
(UInt16)wLenRecv));
}
public List <string> GetReaderList()
{
List <string> retval = new List <string>();
uint pcchReaders = 0;
int nullindex = -1;
char nullchar = (char)0;
try
{
// Establish context
if (!EstablishContext())
{
return(null);
}
// Find out length of the available readers character
LastError = WinSCard.SCardListReaders(
_context,
null,
null,
ref pcchReaders);
if (!IsSuccess(LastError))
{
return(null);
}
// Create a buffer and fill it
byte[] szBuffer = new byte[pcchReaders];
LastError = WinSCard.SCardListReaders(
_context,
null,
szBuffer,
ref pcchReaders);
if (!IsSuccess(LastError))
{
return(null);
}
// Convert szReaders to string
string sBuffer = Encoding.ASCII.GetString(szBuffer);
// Convert length of the available readers character to int
int len = (int)pcchReaders;
while (sBuffer[0] != (char)0)
{
nullindex = sBuffer.IndexOf(nullchar);
string reader = sBuffer.Substring(0, nullindex);
retval.Add(reader);
len = len - (reader.Length + 1);
sBuffer = sBuffer.Substring(nullindex + 1, len);
}
// Release context
ReleaseContext();
return(retval);
}
catch (Exception)
{
throw;
}
}
