[coreboot-gerrit] Change in coreboot[master]: security/vboot: fix policy digest for nvmem spaces

[Andrey Pronin (Code Review)]

Hello build bot (Jenkins), Julius Werner, Aaron Durbin,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/46772

to look at the new patch set (#4).

Change subject: security/vboot: fix policy digest for nvmem spaces
......................................................................

security/vboot: fix policy digest for nvmem spaces

This CL fixes the policy digest that restricts deleting the nvmem spaces
to specific PCR0 states for Chrome OS case. For the general case, the CL
captures the issues with the currently used digest in the comment.
Fixing the general case is only possible after understanding in which
states the nvmem spaces should be deletable, so this CL doesn't attempt
to fix it.

BRANCH=none
BUG=b:140958855
TEST=verified that nvmem spaces created with this digest can be deleted
     in the intended states, and cannot be deleted in other states
     (test details for ChromeOS - in BUG comments).

Change-Id: I3cb7d644fdebda71cec3ae36de1dc76387e61ea7
Signed-off-by: Andrey Pronin 
---
M src/security/vboot/secdata_tpm.c
1 file changed, 37 insertions(+), 9 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/72/46772/4