* why all applications will be measured even if it is in a measured FV in DxeTpm2MeasureBootHandler() ?
@ 2016-09-05 2:23 winddy
2016-09-06 7:26 ` Zhang, Chao B
0 siblings, 1 reply; 2+ messages in thread
From: winddy @ 2016-09-05 2:23 UTC (permalink / raw)
To: edk2-devel
Dear experts,
I find in function DxeTpm2MeasureBootHandler(), all application PE files will be measured, even if it is in a measured FV? Is it a Duplicated measurement?
Thanks.
------------------
BR
winddy_zhang
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: why all applications will be measured even if it is in a measured FV in DxeTpm2MeasureBootHandler() ?
2016-09-05 2:23 why all applications will be measured even if it is in a measured FV in DxeTpm2MeasureBootHandler() ? winddy
@ 2016-09-06 7:26 ` Zhang, Chao B
0 siblings, 0 replies; 2+ messages in thread
From: Zhang, Chao B @ 2016-09-06 7:26 UTC (permalink / raw)
To: winddy, edk2-devel@lists.01.org
Winddy:
It is a good question. The original logic comes from TpmMeasureBootHandler().
TCG EFI Platform Specification Ver1.2 R1.0 Section 6.1 clarifies that the following words
"The measuring entity MUST measure normalized code for all EFI applications into PCR [4]."
From PCR perspective, FV(CRTM) measure targets PCR[0], Application measure targets PCR[4]. They focus
on different aspects.
Thanks & Best regards
Chao Zhang
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of winddy
Sent: Monday, September 05, 2016 10:23 AM
To: edk2-devel
Subject: [edk2] why all applications will be measured even if it is in a measured FV in DxeTpm2MeasureBootHandler() ?
Dear experts,
I find in function DxeTpm2MeasureBootHandler(), all application PE files will be measured, even if it is in a measured FV? Is it a Duplicated measurement?
Thanks.
------------------
BR
winddy_zhang
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