Re: [PATCH v2 2/2] tests: Skip over pcrUpdateCounter byte in result comparison

[Stefan Berger]

On 7/7/20 4:19 AM, David Gibson wrote:
> On Tue, Jul 07, 2020 at 12:05:22AM -0400, Stefan Berger wrote:
> > Due to a change in the TPM 2 code the pcrUpdate counter in the
> > PCRRead response is now different, so we skip comparison of the
> > 14th byte.
> Can you elaborate on this a bit, both in the code comment and the
> commit message.


Will do in v3. Basically the TPM 2 code has been 'fixed' to reflect the 
pcclient profile more closely and due to the change in PCRs that belong 
to the 'TCB group' the response of the TPM2_Pcrread command now returns 
a slightly different value for the pcrUpdateCounter value, which 
unfortunately breaks the test cases. Leaving the TPM 2 as it was wasn't 
a long-term option.

https://github.com/stefanberger/libtpms/commit/0f5d791a7d3431a6831086f5a186cc53149f695f