/// <summary>
/// Reads the file pointed by the SFI found in the FCI of the application.
/// </summary>
/// <returns>Last status word.</returns>
public UInt16 Read()
{
BeforeReadEvent.Raise(this, new EmvEventArgs());
var tlvSfi = TlvFci.GetTag(0x88);
if (tlvSfi == null)
{
throw new Exception(String.Format("PSE: no tag 88 (sfi) found in FCI [{0}]", TlvFci));
}
var sfi = new ShortFileIdentifier(tlvSfi);
byte recordNumber = 0;
do
{
recordNumber++;
var crp = new CommandResponsePair {
CApdu = new EMVReadRecordCommand(recordNumber, sfi.Sfi, 0)
};
crp.Transmit(_cardChannel);
_lastStatusWord = crp.RApdu.StatusWord;
if (crp.RApdu.StatusWord == 0x9000)
{
_tlvRecords.Add(new TlvData(crp.RApdu.Udr));
}
} while (_lastStatusWord == 0x9000);
AfterReadEvent.Raise(this, new EmvEventArgs());
return(_lastStatusWord);
}
/// <summary>
/// Process the GET PROCESSING OPTIONS phase of an EMV transaction.
/// </summary>
/// <returns>Last status word.</returns>
public UInt16 GetProcessingOptions()
{
BeforeGetProcessingOptionsEvent.Raise(this, new EmvEventArgs());
// If PDOL 9F38 is not supplied in FCI, then used 8300 as UDC; if supplied: build the PDOL in tag 83 L V
byte[] pdolDataValue;
if (TlvFci.HasTag(0x9F38))
{
// Use PDOL to build tag 83 value
var pdol = new DataObjectList(TlvFci.GetTag(0x9F38).Value);
var tlvAll = new List <TlvData> {
TlvFci
};
tlvAll.AddRange(TlvTerminalData);
pdolDataValue = pdol.BuildData(tlvAll);
}
else
{
pdolDataValue = new byte[0];
}
// Build tag 83 with computed value
var tlvPdolData = new TlvData(0x83, (uint)pdolDataValue.Length, pdolDataValue);
// Execute GET PROCESSING OPTIONS
var cAPDU = new CommandAPDU(0x80, 0xA8, 0x00, 0x00, tlvPdolData.Length + 2, tlvPdolData.ToByteArray(), 0);
var crp = new CommandResponsePair(cAPDU);
crp.Transmit(_cardChannel);
_lastStatusWord = crp.RApdu.StatusWord;
// If GET RESPONSE needed, do it
if (crp.RApdu.Sw1 == 0x61)
{
_tlvProcessingOptions = new TlvData();
crp = new CommandResponsePair(new GetResponseCommand(crp.RApdu.Sw2));
crp.Transmit(_cardChannel);
_lastStatusWord = crp.RApdu.StatusWord;
}
// Finally, store result
if (crp.RApdu.StatusWord == 0x9000)
{
_tlvProcessingOptions = new TlvData(crp.RApdu.Udr);
}
AfterGetProcessingOptionsEvent.Raise(this, new EmvEventArgs());
return(_lastStatusWord);
}
/// <summary>
/// Enumerates <see cref="EmvApplication">EMVApplication</see>s discovered by reading the PSE.
/// </summary>
/// <returns></returns>
public IEnumerable <EmvApplication> GetApplications()
{
// Enumerate AID indicated in the records
foreach (var tlvRecord in TlvRecords)
{
foreach (var tlvData in tlvRecord.GetTags(0x61))
{
var emv = new EmvApplication(_cardChannel, tlvData);
yield return(emv);
}
}
// If AID can also be found in FCI...
if (SearchTagAidInFci && TlvFci != null)
{
foreach (var tlvData in TlvFci.GetTags(0x61))
{
var emv = new EmvApplication(_cardChannel, tlvData);
yield return(emv);
}
}
}
