private static bool IsTagValid(NFCSharp.NFCTag tag)
{
if (tag == null)
{
return(false);
}
try
{
var ndef = tag.NDEFRead();
if (ndef.Count != 5)
{
return(false);
}
for (int i = 0; i < 5; i++)
{
if (ndef[i].Payload == null || (_encryptData && EncDec.Unprotect(ndef[i].Payload) == null))
{
return(false);
}
}
return(true);
}
catch (Exception ex)
{
Logger.Log(" IsTagValid: NDEFRead failed:" + ex.HResult + " - " + ex.ToString());
// -2146233088 is a parse error which usually means the tag isn't formatted
if (ex.HResult != -2146233088)
{
System.Diagnostics.Debug.WriteLine("NDEFRead failed:" + ex.ToString());
return(false);
}
}
return(false);
}
private bool LoadTagData()
{
if (_tag == null || !IsTagValid())
{
return(false);
}
Logger.Log(" LoadTagData loading");
var ndef = _tag.NDEFRead();
var data0 = ndef[0].Payload;
var data1 = _encryptData ? EncDec.Unprotect(ndef[1].Payload) : ndef[1].Payload;
var data2 = _encryptData ? EncDec.Unprotect(ndef[2].Payload) : ndef[2].Payload;
var data3 = _encryptData ? EncDec.Unprotect(ndef[3].Payload) : ndef[3].Payload;
var data4 = ndef[4].Payload;
DeviceName = Encoding.ASCII.GetString(data0).TrimEnd(Convert.ToChar(0x0));
ipAddress = Encoding.ASCII.GetString(data1).TrimEnd(Convert.ToChar(0x0));
username = Encoding.ASCII.GetString(data2).TrimEnd(Convert.ToChar(0x0));
password = Encoding.ASCII.GetString(data3).TrimEnd(Convert.ToChar(0x0));
var temp = Encoding.ASCII.GetString(data4).TrimEnd(Convert.ToChar(0x0));
return(true);
}