public static TrackData ParseIdtFormat(byte[] bytes)
{
var test = ByteArrayToHexString(bytes);
var testdata = HexStringToByteArray(test);
//get length data
var lenData = BitConverter.ToInt16(new byte[] { bytes[osLenDataL], bytes[osLenDataH] }, 0);
var hexlenData = bytes.Length - 6;
//validate data
var data = SubArray <byte>(bytes, 3, lenData);
if (bytes[lenData + 3] != GetLrc(data) ||
bytes[lenData + 4] != GetChecksumAdd(data) ||
bytes[osStx] != StxValid ||
bytes[lenData + 5] != EtxValid)
{
throw new Exception("invalid card read");
}
// get the actual idtech data
string idtData = test.Substring(0, (lenData + 6) * 2);
//// get the actual idtech data
//string idtData = test.Substring(0, (lenData +6)*2);
//get card encode type and manual
var cardEncodeType = (CardEncodeType)bytes[osCardEncodeType];
var isEnhancedFormat = cardEncodeType == CardEncodeType.AAMVA_Enhanced || cardEncodeType == CardEncodeType.ISOABA_Enhanced || cardEncodeType == CardEncodeType.manual_Enhanced || cardEncodeType == CardEncodeType.Other_Enhanced || cardEncodeType == CardEncodeType.Raw_Enhanced; //isEnhancedFormat==true
var isManual = cardEncodeType == CardEncodeType.manual || cardEncodeType == CardEncodeType.manual_Enhanced;
TrackData trackData;
if (cardEncodeType == CardEncodeType.manual)
{
var trackStatus = bytes[8]; //should be 04
var lenUnEncryptData = bytes[9]; //length of unencrypted data (PAN=EXP= from the status bits) - 16 (22 dec)
int lenEncryptData = lenUnEncryptData % 8 > 0 ? (lenUnEncryptData / 8 + 1) * 8 : lenUnEncryptData; //Note: encrypted data length is len of unencrypted data rounded up to a multiple of 8 bytes(64 - bits) – I think (please test with other lengths of PAN data)
var encryptedData = ByteArrayToHexString(SubArray <byte>(bytes, 10, lenEncryptData));
var hashData = ByteArrayToHexString(SubArray <byte>(bytes, 10 + lenEncryptData, 20));
var expLenStr = ByteArrayToHexString(SubArray <byte>(bytes, 10 + lenEncryptData + 20, 1));
int expLen = Int32.Parse(expLenStr.TrimStart('0'));
var exp = Encoding.ASCII.GetString(SubArray <byte>(bytes, 10 + lenEncryptData + 20 + 1, expLen));
var ksn = ByteArrayToHexString(SubArray <byte>(bytes, 10 + lenEncryptData + 20 + 1 + expLen, 10));
string track2Data = new string('*', lenUnEncryptData - expLen - 3);
track2Data = $";{track2Data}={exp}=";
trackData = new TrackData()
{
T1Data = "",
T2Data = "",
T3Data = "",
T1Crypto = "",
T2Crypto = "",
T3Crypto = "",
T1Hash = "",
T2Hash = "",
T3Hash = "",
SerialNumber = "",
Ksn = ksn,
//EncryptedTracks = ConvertIDTByteArrayToString(bytes),
EncryptedTracks = idtData,
IsSwipe = !isManual
};
trackData.PAN = "";
trackData.Name = "";
trackData.ExpDate = exp;
trackData.T3Data = encryptedData;
}
else if (isEnhancedFormat)
{
var trackStatus = (TrackStatus)bytes[osTrackStatus];
var maskStatus = (MaskStatus)bytes[osMaskStatus];
var dataStatus = (CryptoStatus)bytes[osDataStatus];
var isAesCrypto = maskStatus.HasFlag(MaskStatus.AesEncryption);
var cryptoMultiple = (isAesCrypto ? 16 : 8);
var serialNumberLen = maskStatus.HasFlag(MaskStatus.SerialNumberPresent) ? lenSerialNumber : 0;
var ksnLen = dataStatus.HasFlag(CryptoStatus.KsnPresent) ? lenKsn : 0;
var lenT1 = bytes[osLenT1];
var lenT2 = bytes[osLenT2];
var lenT3 = bytes[osLenT3];
var t1DataLen = trackStatus.HasFlag(TrackStatus.T1Sampling) ? lenT1 : 0;
var t2DataLen = trackStatus.HasFlag(TrackStatus.T2Sampling) ? lenT2 : 0;
var t3DataLen = trackStatus.HasFlag(TrackStatus.T3Sampling) ? lenT3 : 0;
var lenT1CryptoPad = ((lenT1 % cryptoMultiple) > 0 ? cryptoMultiple : 0) - (lenT1 % cryptoMultiple);
var lenT2CryptoPad = ((lenT2 % cryptoMultiple) > 0 ? cryptoMultiple : 0) - (lenT2 % cryptoMultiple);
var lenT3CryptoPad = ((lenT3 % cryptoMultiple) > 0 ? cryptoMultiple : 0) - -(lenT3 % cryptoMultiple);
var t1CryptoLen = dataStatus.HasFlag(CryptoStatus.T1Encrypted) ? lenT1 + lenT1CryptoPad : 0;
var t2CryptoLen = dataStatus.HasFlag(CryptoStatus.T2Encrypted) ? lenT2 + lenT2CryptoPad : 0;
var t3CryptoLen = dataStatus.HasFlag(CryptoStatus.T3Encrypted) ? lenT3 + lenT3CryptoPad : 0;
var t1HashLen = dataStatus.HasFlag(CryptoStatus.T1Hash) ? lenHash : 0;
var t2HashLen = dataStatus.HasFlag(CryptoStatus.T2Hash) ? lenHash : 0;
var t3HashLen = dataStatus.HasFlag(CryptoStatus.T3Hash) ? lenHash : 0;
var osT1Data = 10;
var osT2Data = osT1Data + t1DataLen;
var osT3Data = osT2Data + t2DataLen;
var osT1Crypto = osT3Data + t3DataLen;
var osT2Crypto = osT1Crypto + t1CryptoLen;
var osT3Crypto = osT2Crypto + t2CryptoLen;
var osT1Hash = osT3Crypto + t3CryptoLen;
var osT2Hash = osT1Hash + t1HashLen;
var osT3Hash = osT2Hash + t2HashLen;
var osSerialNumber = osT3Hash + t3HashLen;
var osKsn = osSerialNumber + serialNumberLen;
var osLrc = osKsn + ksnLen;
var osCheckSum = osLrc + 1;
var osEtx = osCheckSum + 1;
trackData = new TrackData()
{
T1Data = Encoding.ASCII.GetString(SubArray <byte>(bytes, osT1Data, t1DataLen)),
T2Data = Encoding.ASCII.GetString(SubArray <byte>(bytes, osT2Data, t2DataLen)),
T3Data = Encoding.ASCII.GetString(SubArray <byte>(bytes, osT3Data, t3DataLen)),
T1Crypto = ByteArrayToHexString(SubArray <byte>(bytes, osT1Crypto, t1CryptoLen)),
T2Crypto = ByteArrayToHexString(SubArray <byte>(bytes, osT2Crypto, t2CryptoLen)),
T3Crypto = ByteArrayToHexString(SubArray <byte>(bytes, osT3Crypto, t3CryptoLen)),
T1Hash = ByteArrayToHexString(SubArray <byte>(bytes, osT1Hash, t1HashLen)),
T2Hash = ByteArrayToHexString(SubArray <byte>(bytes, osT2Hash, t2HashLen)),
T3Hash = ByteArrayToHexString(SubArray <byte>(bytes, osT3Hash, t3HashLen)),
SerialNumber = ByteArrayToHexString(SubArray <byte>(bytes, osSerialNumber, serialNumberLen)),
Ksn = ByteArrayToHexString(SubArray <byte>(bytes, osKsn, ksnLen)),
EncryptedTracks = ConvertIDTByteArrayToString(bytes),
IsSwipe = !isManual
};
var track1Values = GetTrack1(trackData.T1Data);
trackData.PAN = track1Values.PAN;
trackData.Name = track1Values.Name ?? track1Values.Name;
trackData.ExpDate = track1Values.ExpDate;
//debit card has not track1 data
if (trackData.T1Data == string.Empty)
{
string track1 = trackData.T2Data;
track1 = track1.Replace(";", "%%");
track1 = track1.Replace('*', '0');
track1 = track1.Replace('?', '0');
track1 = track1.Replace("=", "^MANUALLY/ENTERED^");
track1Values = GetTrack1(track1);
trackData.PAN = track1Values.PAN;
trackData.Name = "";
trackData.ExpDate = track1Values.ExpDate;
}
//Matthew: use ingenigo format for IDT data
if (String.IsNullOrWhiteSpace(trackData.T2Data) && String.IsNullOrWhiteSpace(trackData.T3Data))
{
trackData.T3Data = $"{trackData.Ksn}:1:{trackData.T1Crypto.Length / 2:D4}:{trackData.T1Crypto}";
}
else if (String.IsNullOrWhiteSpace(trackData.T3Data) && !String.IsNullOrWhiteSpace(trackData.T2Crypto))
{
trackData.T3Data = $"{trackData.Ksn}:2:{trackData.T2Crypto.Length / 2:D4}:{trackData.T2Crypto}";
trackData.T1Data = string.Empty;
}
if (isManual)
{
string firstHalf = ByteArrayToHexString(SubArray <byte>(bytes, 3, osT2Data - 3)) + Encoding.ASCII.GetString(SubArray <byte>(bytes, osT2Data, t2DataLen));
string newData = firstHalf + idtData.Substring(firstHalf.Length + t2DataLen + 6);
int dataLength = newData.Length - 6;
string dataLengthHex = dataLength.ToString("X");
newData = newData.Substring(0, dataLength);
//var newDataHex =HexStringToByteArray(newData);
long LRC = 0;
long ChkSum = 0;
for (int i = 0; i < newData.Length; i++)
{
long l = Convert.ToInt64(newData[i]);
LRC ^= l;
ChkSum += l;
}
byte[] LRCArray = BitConverter.GetBytes(LRC);
byte[] ChkSumArray = BitConverter.GetBytes(ChkSum);
byte[] ending = new byte[3];
ending[0] = LRCArray[0];
ending[1] = ChkSumArray[0];
ending[2] = EtxValid;
newData = "02" + dataLengthHex + "00" + newData + ByteArrayToHexString(ending);
trackData.EncryptedTracks = newData;
}
else
{
trackData.EncryptedTracks = $"{trackData.T1Data}|{trackData.T2Data}|{trackData.T3Data}";
}
}
else if (cardEncodeType == CardEncodeType.ISOABA) //original format
{
var trackStatus = bytes[4]; //should be 04
var lenUnEncryptTrack1 = bytes[5]; //length of unencrypted data (PAN=EXP= from the status bits) - 16 (22 dec)
var lenUnEncryptTrack2 = bytes[6];
var lenUnEncryptTrack3 = bytes[7];
int indexUnEcryptTrack1 = 8;
int indexUnEcryptTrack2 = indexUnEcryptTrack1 + lenUnEncryptTrack1;
int indexUnEcryptTrack3 = indexUnEcryptTrack2 + lenUnEncryptTrack2;
int lenEncryptTrack = (lenUnEncryptTrack1 + lenUnEncryptTrack2 + lenUnEncryptTrack3) % 8 > 0 ?
((lenUnEncryptTrack1 + lenUnEncryptTrack2 + lenUnEncryptTrack3) / 8 + 1) * 8 : (lenUnEncryptTrack1 + lenUnEncryptTrack2 + lenUnEncryptTrack3);
int indexEncryptTrack = indexUnEcryptTrack3 + lenUnEncryptTrack3;
int lenHash = 20;
int lenHashTrack1 = 0;
int lenHashTrack2 = 0;
int indexHashTrack1 = indexEncryptTrack + lenEncryptTrack;
if (lenUnEncryptTrack1 > 0)//we have track1, we have track1 hash.
{
lenHashTrack1 = lenHash;
}
int indexHashTrack2 = indexHashTrack1 + lenHashTrack1;
if (lenUnEncryptTrack2 > 0)//we have track2, we have track2 hash.
{
lenHashTrack2 = lenHash;
}
int indexKsn = indexHashTrack2 + lenHashTrack2;
int lenKsn = 10;
trackData = new TrackData()
{
T1Data = Encoding.ASCII.GetString(SubArray <byte>(bytes, indexUnEcryptTrack1, lenUnEncryptTrack1)),
T2Data = Encoding.ASCII.GetString(SubArray <byte>(bytes, indexUnEcryptTrack2, lenUnEncryptTrack2)),
T3Data = Encoding.ASCII.GetString(SubArray <byte>(bytes, indexUnEcryptTrack3, lenUnEncryptTrack3)),
T1Crypto = ByteArrayToHexString(SubArray <byte>(bytes, indexEncryptTrack, lenEncryptTrack)),
T2Crypto = "",
T3Crypto = "",
T1Hash = ByteArrayToHexString(SubArray <byte>(bytes, indexHashTrack1, lenHashTrack1)),
T2Hash = ByteArrayToHexString(SubArray <byte>(bytes, indexHashTrack2, lenHashTrack2)),
T3Hash = "",
SerialNumber = "",
Ksn = ByteArrayToHexString(SubArray <byte>(bytes, indexKsn, lenKsn)),
EncryptedTracks = "",
IsSwipe = !isManual
};
var track1Values = GetTrack1(trackData.T1Data);
trackData.PAN = track1Values.PAN;
trackData.Name = track1Values.Name ?? track1Values.Name;
trackData.ExpDate = track1Values.ExpDate;
//debit card has not track1 data
if (trackData.T1Data == string.Empty)
{
string track1 = trackData.T2Data;
track1 = track1.Replace(";", "%%");
track1 = track1.Replace('*', '0');
track1 = track1.Replace('?', '0');
track1 = track1.Replace("=", "^MANUALLY/ENTERED^");
track1Values = GetTrack1(track1);
trackData.PAN = track1Values.PAN;
trackData.Name = "";
trackData.ExpDate = track1Values.ExpDate;
}
if (lenUnEncryptTrack2 > 0)//if we do not have track2, it means it is an invalid swipe or card.
{
trackData.T3Data = $"{trackData.Ksn}:4:{(trackData.T1Crypto.Length) / 2:D4}:{trackData.T1Crypto}";
}
else
{
trackData.T3Data = string.Empty;
}
trackData.EncryptedTracks = $"{trackData.T1Data}|{trackData.T2Data}|{trackData.T3Data}";
}
else
{
trackData = null;
}
if (String.IsNullOrWhiteSpace(trackData?.Ksn) || String.IsNullOrWhiteSpace(trackData?.T3Data))
{
trackData = null;
}
return(trackData);
}
public static TrackData ParseXmlFormat(byte[] bytes)
{
var test = Encoding.ASCII.GetString(bytes);
var testdata = Encoding.ASCII.GetBytes(test);
var osDvcMsgEnd = search(bytes, Encoding.ASCII.GetBytes("</DvcMsg>"), 0);
var osCard = search(bytes, Encoding.ASCII.GetBytes("<Card "), 0);
var osCardEnd = search(bytes, Encoding.ASCII.GetBytes("></Card"), osCard);
int osETrk1 = 0;
int osETrk1End = 0;
int osETrk2 = 0;
int osETrk2End = 0;
int osECData = 0;
int osECDataEnd = 0;
int cardEntry = search(bytes, Encoding.ASCII.GetBytes("Entry=\"MANUAL\""), 0);
if (cardEntry > 0)//manual
{
osECData = search(bytes, Encoding.ASCII.GetBytes("ECData=\""), osCard);
if (osECData < 0)
{
osECData = 0;
}
osECDataEnd = search(bytes, Encoding.ASCII.GetBytes("\" CDataKSN=\""), osECData);
}
else
{
try
{
osETrk1 = search(bytes, Encoding.ASCII.GetBytes("ETrk1=\""), osCard);
if (osETrk1 < 0)
{
osETrk1 = 0;
}
osETrk1End = search(bytes, Encoding.ASCII.GetBytes("\" ETrk2=\""), osETrk1);
}
catch (Exception ex)
{
}
osETrk2 = search(bytes, Encoding.ASCII.GetBytes("ETrk2=\""), osETrk1End);
osETrk2End = search(bytes, Encoding.ASCII.GetBytes("\" CDataKSN=\""), osETrk2);
}
var osKsn = search(bytes, Encoding.ASCII.GetBytes("CDataKSN=\""), osETrk2);
var osKsnEnd = search(bytes, Encoding.ASCII.GetBytes("\" Exp=\""), osKsn);
const int MaxResponseLength = 666;
var data = new StringBuilder(MaxResponseLength);
if (osETrk1 > 0)
{
data.Append(Encoding.ASCII.GetString(SubArray <byte>(bytes, 0, osETrk1 + 7)));
data.Append(ByteArrayToHexString(((SubArray <byte>(bytes, osETrk1 + 7, osETrk1End - osETrk1 - 7)))));
data.Append(Encoding.ASCII.GetString(SubArray <byte>(bytes, osETrk1End, osETrk2 - osETrk1End + 7)));
}
if (osETrk2 > 0)
{
data.Append(ByteArrayToHexString(SubArray <byte>(bytes, osETrk2 + 7, osETrk2End - osETrk2 - 7)));
data.Append(Encoding.ASCII.GetString(SubArray <byte>(bytes, osETrk2End, osKsn - osETrk2End + 10)));
}
if (osECData > 0) //manual input
{
data.Append(Encoding.ASCII.GetString(SubArray <byte>(bytes, 0, osECData + 8)));
data.Append(ByteArrayToHexString(((SubArray <byte>(bytes, osECData + 8, osECDataEnd - osECData - 8)))));
data.Append(Encoding.ASCII.GetString(SubArray <byte>(bytes, osECDataEnd, osKsn - osECDataEnd + 10)));
}
data.Append(ByteArrayToHexString(SubArray <byte>(bytes, osKsn + 10, osKsnEnd - osKsn - 10)));
data.Append(Encoding.ASCII.GetString(SubArray <byte>(bytes, osKsnEnd, osDvcMsgEnd - osKsnEnd + 9)));
var dvcMsg = data.ToString();
dvcMsg = dvcMsg.Replace("\0", " ");//remove the "\0" null value.
XmlSerializer serializer = new XmlSerializer(typeof(DvcMsg));
StringReader rdr = new StringReader(dvcMsg);
var obj = (DvcMsg)serializer.Deserialize(rdr);
var trackData = new TrackData()
{
IsDebit = false,
T1Data = obj.Card.ETrk1,
T2Data = obj.Card.ETrk2,
Name = obj.Card.CHolder ?? string.Empty,
ExpDate = obj.Card.Exp.ToString(),
PAN = obj.Card.MskPAN,
EncryptedTracks = "",
T1Crypto = obj.Card.ETrk1,
T2Crypto = obj.Card.ETrk2,
Ksn = obj.Card.CDataKSN
};
//trackData.SerialNumber = obj.Dvc.DvcSN.ToString();
trackData.IsSwipe = true;
//Matthew: use ingenigo format for IDT data
if (String.IsNullOrWhiteSpace(trackData.T1Crypto) && String.IsNullOrWhiteSpace(trackData.T2Crypto))
{
trackData.IsSwipe = false;
trackData.PAN = trackData.PAN.Replace('*', '0');
trackData.T1Data = $"";
trackData.T2Data = $"";
trackData.T3Data = $"";
}
else if (String.IsNullOrWhiteSpace(trackData.T2Data))
{
trackData.T3Data = $"{trackData.Ksn}:1:{trackData.T1Crypto.Length / 2:D4}:{trackData.T1Crypto}";
}
else
{
trackData.T3Data = $"{trackData.Ksn}:2:{trackData.T2Crypto.Length / 2:D4}:{trackData.T2Crypto}";
trackData.T1Data = string.Empty;
}
if (trackData.IsSwipe)
{
trackData.EncryptedTracks = $"{trackData.T1Data}|{trackData.T2Data}|{trackData.T3Data}";
}
else
{
trackData.EncryptedTracks = dvcMsg;
}
return(trackData);
}
