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‎05-05-2024 05:24 PM - edited ‎05-05-2024 07:29 PM

HP Recommended
Product: HP Z240 Small Form Factor Workstation

On firmware N51 ver. 01.91, The file /sys/kernel/security/binary_bios_measurements is missing "Exit Boot Services Invocation" and "Exit Boot Services Returned with Success" entries causing pcr[5] to return a different value to what is calculated through the file.

 

I am running linux 6.8.9

The tpm family is 2.0

The tpm firmware version is 7.63.3353.0

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‎05-05-2024 08:41 PM

HP Recommended

In addition I have found that the "Calling EFI Application from Boot Option" event is measured into pcr[5] when it should be measured into pcr[4], see TCG PC Client Platform Firmware Profile Version 1.06 Revision 52 section 8.2.4.4.a

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