private void ParseHistoricBytes(IEnumerator <byte> bytesEnumerator)
{
var t0 = InterfaceBytes.FirstOrDefault(tx => tx.Id == InterfaceId.T0);
if (t0 == null)
{
throw new MalformedAtrException(String.Format("Missing T0 in {0}", AtrBytes.ToHexa()));
}
var historicLength = t0.Value & 0x0F;
var historicBytes = new List <byte>();
while (bytesEnumerator.MoveNext() && historicLength > 0)
{
historicBytes.Add(bytesEnumerator.Current);
historicLength--;
}
if (historicLength != 0)
{
throw new MalformedAtrException(String.Format("{0} historic bytes missing in {1}", historicLength, AtrBytes.ToHexa()));
}
HistoricBytes = historicBytes.ToArray();
}
/// <summary>
/// Parses an ATR given by a byte array.
/// </summary>
/// <param name="atr"></param>
/// <returns>Number of bytes in the ATR</returns>
public void Parse(IEnumerable <byte> atr)
{
if (atr == null)
{
return;
}
AtrBytes = atr.ToArray();
using (var bytesEnumerator = AtrBytes.AsEnumerable().GetEnumerator())
{
if (bytesEnumerator.MoveNext() == false)
{
throw new Exception(String.Format("Invalid ATR: {0}", AtrBytes));
}
// TS
Ts = new TsCharacter(bytesEnumerator.Current);
// Interface bytes
ParseInterfaceBytes(bytesEnumerator);
// Historic bytes
ParseHistoricBytes(bytesEnumerator);
// TCK
if (HasTck)
{
Tck = bytesEnumerator.Current;
}
}
}
