TPM Provisioning not working with actual TPM device

Question

On the DragonBoard 410c, I can provision the TPM via the Device Portal or with the IoT Core Dashboard, and in both cases, the stored information is not available via the TpmDevice(0) logical device.

TpmDevice(0).GetDeviceID() does return a value, but it is not the configured value, and .GetHostName() and .GetSasToken() both return null.

I can't test on the MinnowBoard Max, because the TPM 2.0 implementation on that board is not complete, and the Raspberry Pi doesn't have a TPM.

I have not tried using the software simulated TPM on the MBM because I want this to actually be secure.

Here's my code, for what it's worth.

TpmDevice myDevice = new TpmDevice(0);
string hubUri = myDevice.GetHostName();   // returns null
string deviceId = myDevice.GetDeviceId(); // returns wrong value
string sasToken = myDevice.GetSASToken(); // returns null

Answer 1

You can follow the following tutorial to verify you have the right TPM version enabled and fTPM is functioning:

Setup firmware TPM (fTPM)

Answer 2

This is an issue with the Insider Preview for the Dragonboard. The current release (15063) does not have this issue.

Marking myself the answer.

Problem apparently made it all the way through the insider builds into production. 16299 shows the same behavior for me as its insider preview versions did.

https://github.com/ms-iot/security/issues/29