private Card CreateCard(SCARD_READERSTATE readerstate)
{
uint retVal;
if ((readerstate.dwCurrentState & ReaderState.SCARD_STATE_PRESENT) == ReaderState.SCARD_STATE_PRESENT)
{
throw new ArgumentException("No card is present in the reader");
}
int cardNamesLen = 0;
char[] cardNames = null;
retVal = NativeMethods.SCardListCards(context, readerstate.rgbAtr, IntPtr.Zero, 0, cardNames, ref cardNamesLen);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to list card names from ATR (length): 0x" + retVal.ToString("X"));
}
cardNames = new char[cardNamesLen];
retVal = NativeMethods.SCardListCards(context, readerstate.rgbAtr, IntPtr.Zero, 0, cardNames, ref cardNamesLen);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to list card names from ATR: 0x" + retVal.ToString("X"));
}
List <String> carNameList = MultiString.ToStringList(cardNames);
return(EidCard.IsEid(carNameList) ? new EidCard(context, readerstate.szReader, readerstate.rgbAtr) : new Card(context, readerstate.szReader, readerstate.rgbAtr));
}
public List <Card> ListCards(params string[] cardNames)
{
List <SCARD_READERSTATE> readerStateList = new List <SCARD_READERSTATE>();
foreach (String name in List)
{
var readerState = new SCARD_READERSTATE()
{
szReader = name,
dwCurrentState = ReaderState.SCARD_STATE_UNKNOWN,
};
readerStateList.Add(readerState);
}
SCARD_READERSTATE[] readerStates = readerStateList.ToArray();
List <Card> cards = new List <Card>();
uint retVal = NativeMethods.SCardLocateCards(context, MultiString.ToMultiString(cardNames), readerStates, readerStates.Length);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to update the status: 0x" + retVal.ToString("X"));
}
for (int i = 0; i < readerStates.Length; i++)
{
SCARD_READERSTATE state = readerStates[i];
if ((state.dwEventState & ReaderState.SCARD_STATE_PRESENT) == ReaderState.SCARD_STATE_PRESENT)
{
cards.Add(CreateCard(state));
}
}
return(cards);
}
public Readers(ReaderScope scope)
{
uint retVal;
switch (scope)
{
case ReaderScope.Null:
context = new CardContextSafeHandler(IntPtr.Zero);
break;
case ReaderScope.System:
retVal = NativeMethods.SCardEstablishContext(ContextScope.SCARD_SCOPE_SYSTEM, IntPtr.Zero, IntPtr.Zero, out context);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to create static context for reader: 0x" + retVal.ToString("X"));
}
break;
case ReaderScope.User:
retVal = NativeMethods.SCardEstablishContext(ContextScope.SCARD_SCOPE_USER, IntPtr.Zero, IntPtr.Zero, out context);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to create static context for reader: 0x" + retVal.ToString("X"));
}
break;
}
int size = 0;
//List the readers
//todo::listen for new readers changes (via the "\\?PnP?\Notification" reader)
char[] readers = null;
retVal = NativeMethods.SCardListReaders(context, null, readers, ref size);
if (retVal != 0 && retVal != 0x8010002E)
{
throw new InvalidOperationException("Failed to list readers (length): 0x" + retVal.ToString("X"));
}
if (retVal == 0x8010002E) //no readers
{
List = new List <string>(0);
}
else
{
readers = new char[size];
retVal = NativeMethods.SCardListReaders(context, null, readers, ref size);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to list readers: 0x" + retVal.ToString("X"));
}
List = MultiString.ToStringList(readers);
}
}
private void UpdateList()
{
uint retVal;
int size = 0;
char[] readers = null;
retVal = NativeMethods.SCardListReaders(context, null, readers, ref size);
if (retVal != 0 && retVal != 0x8010002E)
{
throw new InvalidOperationException("Failed to list readers (length): 0x" + retVal.ToString("X"));
}
if (retVal == 0x8010002E) //no readers
{
List.Clear();
}
else
{
readers = new char[size];
retVal = NativeMethods.SCardListReaders(context, null, readers, ref size);
if (retVal != 0)
{
throw new InvalidOperationException("Failed to list readers: 0x" + retVal.ToString("X"));
}
List <String> newList = MultiString.ToStringList(readers);
foreach (String name in List.ToList())
{
if (!newList.Contains(name))
{
List.Remove(name);
}
}
foreach (String name in newList)
{
if (!List.Contains(name))
{
List.Add(name);
}
}
}
}
