public CardHelper(CardHandle aCard)
{
if (aCard == null)
{
throw new ArgumentNullException("invalid card handle");
}
m_aCard = aCard;
CardPcscPart3 pcscPart3Info = new CardPcscPart3(aCard.GetATR());
if (pcscPart3Info.isValid)
{
m_isContactless = pcscPart3Info.isContactless;
m_cardInfo += "PC/SC 2.01 compliant ATR detected\n";
m_cardInfo += "interface: ";
if (m_isContactless == true)
{
m_cardInfo += "contactless\n";
}
else
{
m_cardInfo += "contact\n";
}
m_cardInfo += "protocol: " + pcscPart3Info.CardProtocol + "\n";
m_cardInfo += "card type: " + pcscPart3Info.CardName + "\n";
}
else
{
//m_cardInfo += "ATR is not PC/SC 2.01 part 3 compliant\n";
//m_cardInfo += "processor card or proprietary storage card\n";
}
// at this time we know: it is NOT a contactless or contact storage card as defined in PC/SC part 3
// Let's try to find out more by analyzing the reader name. We may get lucky. Note though, that there is
// no clean, standards-based way to determine the card interface this way.
if (m_isContactless == false)
{
if (aCard.Slot.CardTerminalName.Contains("OMNIKEY") &&
aCard.Slot.CardTerminalName.Contains("CL"))
{
if (aCard.Slot.CardTerminalName.Contains("5x25"))
{
m_isProxViaATR = true;
m_cardInfo += "125 KHz PROX via ATR historical bytes\n";
}
else
{
m_isContactless = true;
m_cardInfo += "contactless based on reader name\n";
}
}
}
if (m_isContactless == false)
{
if (aCard.Slot.CardTerminalName.ToUpper().Contains("CONTACTLESS") == true) // SCM readers contain this string
{
m_isContactless = true;
m_cardInfo += "contactless based on reader name\n";
}
}
if (m_isContactless == false && m_isProxViaATR == false)
{
// we could start an analysis based onm an ATR mask here
m_cardInfo += "unknown card interface (fall back)\n";
}
// let us know if you are using a reader that could be handled here
// [email protected]
m_cardInfo += "end of card info ";
}
/// <summary>
///
/// </summary>
/// <param name="aCardSlot"></param>
public void AnalyzeCard(CardTerminalSlot aCardSlot)
{
// Acquire any processor card (T=0 or T=1) that may be present in the given card
// terminal slot
string readerName = aCardSlot.CardTerminalName;
CardActivationResult nActivationResult;
DisplayText("Reader Name: " + readerName);
//aCardSlot.CardTerminal.Config
CardHandle aCard = aCardSlot.AcquireCard((CardTypes.T0 | CardTypes.T1), out nActivationResult);
if (nActivationResult != CardActivationResult.Success)
{
Debug.Assert(aCard == null);
switch (nActivationResult)
{
case CardActivationResult.NoCard:
m_aPromptLabel.Text = readerName + ": Please insert card ...";
break;
case CardActivationResult.UnresponsiveCard:
m_aPromptLabel.Text = readerName + ": Unresponsive card.";
break;
case CardActivationResult.InUse:
m_aPromptLabel.Text = readerName + ": Card in use";
break;
default:
m_aPromptLabel.Text = readerName + ": Can't power up card!";
break;
}
return;
}
m_aPromptLabel.Text = aCardSlot.CardTerminalName + ": Found card";
DisplayText("Found card in reader " + aCardSlot.CardTerminalName);
DisplayReaderProperties(aCardSlot);
aCardSlot.BeginTransaction();
try
// We are doing a few things here that any card system should support.
// Note that the CardHandle represents the combination of card terminal and
// powered-up card.
{
// =========================== ATR DETECTION ======================================
// Every card accessed through PC/SC must return an Answer To Reset (ATR).
// So let's see what we've got here.
byte[] atr = aCard.GetATR();
if (atr.Length == 0)
{
throw new Exception("Invalid ATR");
}
DisplayText("ATR: " + CardHex.FromByteArray(atr, 0, atr.Length));
// ================================================================================
// Go a little deeper: is this a contact or contactless card system we are dealing with?
CardHelper cardHelper = new CardHelper(aCard);
DisplayText(cardHelper.cardInfo);
if (cardHelper.isContactless)
{
// =========================== APDU EXCHANGE ==================================
// Now we can try to get a unique identifier (UID). Any contactless card with a
// PC/C 2.01 compliant card reader should be able to generate a UID. But never mind,
// even if this fails it still shows how to create a command APDU with our SmartCardAPI
// frameqwork and get a response APDU back from a card.
//
// Known issues:
// SendCommand with CLA=0xFF can cause an exception with some smart card systems,
// triggered by an "Unknown Error" (-2146435025) on PC/SC level.
// Therefore this code should only be run if we are accessing a contactless reader
// interface that is PC/SC 2.01 compliant
// ============================================================================
byte CL_CLA = 0xFF;
byte CL_INS_GET_UID = 0xCA;
byte P1 = 0;
byte P2 = 0;
CardCommandAPDU aCmdAPDU = new CardCommandAPDU(CL_CLA, CL_INS_GET_UID, P1, P2, 256);
CardResponseAPDU aRespAPDU;
aRespAPDU = aCard.SendCommand(aCmdAPDU);
if (!aRespAPDU.IsSuccessful)
{
DisplayText("WARNING: can't get a UID - this might be a contact card.");
}
else
{
byte[] uidWithSw12 = aRespAPDU.GenerateBytes();
if (uidWithSw12.Length < 2)
{
throw new Exception("Invalid UID");
}
var uid = CardHex.FromByteArray(uidWithSw12, 0, uidWithSw12.Length - 2);
DisplayText("UID: " + uid);
if (uid.Length > 0)
{
_reader.SendRFID(uid);
}
}
}
aCardSlot.EndTransaction();
}
catch (Exception x)
{
Trace.WriteLine(x.ToString());
DisplayText(x.ToString());
m_aPromptLabel.Text = "Card access error";
}
finally
{
aCard.Dispose(); // release card handle
}
}