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Add support for WithDriversAndAppsConfigProfile (PCR3) #341

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chrisccoulson opened this issue Oct 11, 2024 · 0 comments
Open

Add support for WithDriversAndAppsConfigProfile (PCR3) #341

chrisccoulson opened this issue Oct 11, 2024 · 0 comments

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@chrisccoulson
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f PCR7 isn't supported for some reason, eg, because secure boot is disabled or the device is not in deployed mode, then we should be able to fall back to a safe profile that includes PCRs 1, 2, 3, 4 and 5. PCR 2 and 4 are for binding to all code that's loaded outside of the platform firmware.

PCR1 is to bind to all of the platform firmware's configuration - currently, changes to security-sensitive settings such as enabling a debugger or disabling DMA remapping change the value of PCR7 by adding extra EVI_EFI_ACTION events.

PCR3 contains any configuration related to UEFI drivers that are not part of the platform firmware.

PCR5 contains the GPT of the IBL and can be used for any bootloader configuration, and support for this will be tracked in a separate issue.

To support this, the efi package needs a new WithDriversAndAppsConfigProfile API that will support PCR3.

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