public LinuxTpmDevice(string tpmDevicePath = null)
{
_tpmDevicePath = tpmDevicePath ?? "/dev/tpm0";
// _tpmDevicePath = tpmDevicePath ?? "/dev/tpmrm0";
try
{
Connect();
}
catch (Exception)
{
//Console.WriteLine("Failed to connect to " + tpmDevicePath);
try
{
TctiCtx = AbrmdWrapper.Load(out TctiCtxPtr);
}
catch (Exception e)
{
Console.WriteLine($"Exception while loading tpm2-abrmd: {e}");
}
if (TctiCtx == null)
{
// If the first attempt to connect was to the kernel mode TRM,
// then try to connect to the raw TPM device, and vice versa.
_tpmDevicePath = _tpmDevicePath.Contains("/dev/tpmrm")
? _tpmDevicePath.Replace("/dev/tpmrm", "/dev/tpm") : "/dev/tpmrm0";
try
{
Connect();
}
catch (Exception)
{
//Console.WriteLine("Failed to connect to " + tpmDevicePath);
Debug.Assert(_tpmIO == null);
TrmDevice = new TcpTpmDevice("127.0.0.1", 2323, false, true);
TrmDevice.Connect();
}
}
}
Close();
}
// Connect to TPM device
public override void Connect()
{
if (TctiCtx != null && TctiCtxPtr == IntPtr.Zero)
{
try
{
TctiCtx = AbrmdWrapper.Load(out TctiCtxPtr);
}
catch (Exception e)
{
Console.WriteLine($"Exception while loading tpm2-abrmd: {e}");
}
}
else if (TrmDevice != null)
{
TrmDevice.Connect();
}
else
{
_tpmIO = new FileStream(_tpmDevicePath, FileMode.Open, FileAccess.ReadWrite);
}
}