private void WaitChangeStatus(object sender, DoWorkEventArgs e)
{
while (!e.Cancel)
{
if (context == IntPtr.Zero)
{
return;
}
int result = WinSCard.SCardGetStatusChange(context, 1000, readerStates, readerStates.Length);
for (int i = 0; i < readerStates.Length; i++)
{
// Check if the state changed from the last time.
if ((readerStates[i].dwEventState & (int)WinSCard.CardState.Changed) == (int)WinSCard.CardState.Changed)
{
// Check what changed
WinSCard.CardState state = WinSCard.CardState.None;
if ((readerStates[i].dwEventState & (int)WinSCard.CardState.Present) == (int)WinSCard.CardState.Present &&
(readerStates[i].dwCurrentState & (int)WinSCard.CardState.Present) != (int)WinSCard.CardState.Present)
{
// The card was inserted
state = WinSCard.CardState.Present;
}
else if ((readerStates[i].dwEventState & (int)WinSCard.CardState.Empty) == (int)WinSCard.CardState.Empty &&
(readerStates[i].dwCurrentState & (int)WinSCard.CardState.Empty) != (int)WinSCard.CardState.Empty)
{
// The card was removed
state = WinSCard.CardState.Empty;
}
if (state != WinSCard.CardState.None && readerStates[i].dwCurrentState != (int)WinSCard.CardState.None)
{
switch (state)
{
case WinSCard.CardState.Present:
if (CardInserted != null)
{
Connect(readerStates[i].szReader);
CardInserted(readerStates[i].szReader, ATR);
Disconnect();
}
break;
case WinSCard.CardState.Empty:
if (CardRemoved != null)
{
CardRemoved(readerStates[i].szReader);
}
break;
}
}
// Update the current state for the next time they are checked
readerStates[i].dwCurrentState = readerStates[i].dwEventState;
}
}
}
}
public void Dispose()
{
monitorThread.CancelAsync();
monitorThread.Dispose();
int result = WinSCard.SCardReleaseContext(context);
if (result != WinSCard.SCARD_S_SUCCESS)
{
throw new PCSCException(result);
}
}
private byte[] GetAnswerToReset()
{
int result = 0;
byte[] readerName = null;
uint readerLen = 0;
uint state = 0;
uint protocol = 0;
byte[] atr = null;
uint atrLen = 0;
result = WinSCard.SCardStatus(card, readerName, ref readerLen, out state, out protocol, atr, ref atrLen);
if (result != WinSCard.SCARD_S_SUCCESS)
{
throw new PCSCException(result);
}
readerName = new byte[readerLen];
atr = new byte[atrLen];
result = WinSCard.SCardStatus(card, readerName, ref readerLen, out state, out protocol, atr, ref atrLen);
if (result != WinSCard.SCARD_S_SUCCESS)
{
throw new PCSCException(result);
}
#region Debug output
#if DEBUG
if (outputDebugString)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < atrLen; i++)
{
sb.AppendFormat("{0:X2}", atr[i]);
}
Debug.WriteLine(sb.ToString());
}
#endif
#endregion
MultiString msReaderName = new MultiString(readerName);
if (result != WinSCard.SCARD_S_SUCCESS)
{
throw new PCSCException(result);
}
return(atr);
}
public bool Disconnect()
{
int result = WinSCard.SCardDisconnect(card, WinSCard.Disposition.SCARD_UNPOWER_CARD);
if (result != WinSCard.SCARD_S_SUCCESS)
{
throw new PCSCException(result);
}
else
{
connected = false;
atr = null;
}
return((result == WinSCard.SCARD_S_SUCCESS) ? true : false);
}
public bool Connect(string reader)
{
int result = WinSCard.SCardConnect(context, reader, WinSCard.ShareMode.SCARD_SHARE_SHARED, WinSCard.Protocol.SCARD_PROTOCOL_T0 | WinSCard.Protocol.SCARD_PROTOCOL_T1, ref card, ref activeProtocol);
if (result != WinSCard.SCARD_S_SUCCESS)
{
throw new PCSCException(result);
}
else
{
connected = true;
atr = GetAnswerToReset();
}
return((result == WinSCard.SCARD_S_SUCCESS) ? true : false);
}
public PCSCReader()
{
int result = 0;
result = WinSCard.SCardEstablishContext(WinSCard.Scope.SCARD_SCOCPE_SYSTEM, IntPtr.Zero, IntPtr.Zero, out context);
if (result != WinSCard.SCARD_S_SUCCESS)
{
Debug.WriteLine(WinSCard.SCardErrorMessage(result));
}
byte[] readers = null;
uint readerCount = 0;
result = WinSCard.SCardListReaders(context, null, readers, ref readerCount);
readers = new byte[readerCount];
result = WinSCard.SCardListReaders(context, null, readers, ref readerCount);
availableReaders = new MultiString(readers);
if (result != WinSCard.SCARD_S_SUCCESS)
{
Debug.WriteLine(WinSCard.SCardErrorMessage(result));
}
//Start a background worker thread which monitors available card readers.
if ((availableReaders.Count > 0))
{
readerStates = new WinSCard.SCARD_READERSTATE[availableReaders.Count];
for (int i = 0; i < readerStates.Length; i++)
{
readerStates[i].szReader = availableReaders.ToArray()[i];
}
monitorThread = new BackgroundWorker();
monitorThread.WorkerSupportsCancellation = true;
monitorThread.DoWork += WaitChangeStatus;
monitorThread.RunWorkerAsync();
}
}
public PCSCException(int result)
: base(WinSCard.SCardErrorMessage(result))
{
Result = result;
}
public APDUResponse Transmit(APDUCommand apdu)
{
byte[] recvBuffer = new byte[256];
int recvLength = recvBuffer.Length;
IntPtr sendPci = IntPtr.Zero;
switch ((WinSCard.Protocol)activeProtocol)
{
case WinSCard.Protocol.SCARD_PROTOCOL_T0:
sendPci = WinSCard.SCARD_PCI_T0;
break;
case WinSCard.Protocol.SCARD_PROTOCOL_T1:
sendPci = WinSCard.SCARD_PCI_T1;
break;
}
#region Debug output
#if DEBUG
if (outputDebugString)
{
StringBuilder sb = new StringBuilder();
foreach (byte b in apdu.ToArray())
{
sb.AppendFormat("{0:X2}", b);
}
Debug.WriteLine(sb.ToString());
}
#endif
#endregion
int result = WinSCard.SCardTransmit(card, sendPci, apdu.ToArray(), apdu.ToArray().Length, IntPtr.Zero, recvBuffer, ref recvLength);
if (result != WinSCard.SCARD_S_SUCCESS)
{
throw new PCSCException(result);
}
#region Debug output
#if DEBUG
if (outputDebugString)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < recvLength; i++)
{
sb.AppendFormat("{0:X2}", recvBuffer[i]);
}
Debug.WriteLine(sb.ToString());
}
#endif
#endregion
byte[] response = new byte[recvLength];
Buffer.BlockCopy(recvBuffer, 0, response, 0, recvLength);
return(new APDUResponse(response));
}