Hi Lee,
TPM2_SetPrimaryPolicy can be used with password authorization (same as
TPM2_HierarchyControl)
Regards,
Stefan
From: Rosenbaum, Lee G [mailto:[email protected]]
Sent: Friday, November 14, 2014 8:57 PM
To: [email protected]
Subject: Re: [edk2] SecurityPkg: TPM2_SetPrimaryPolicy command
Hi Stefan,
I noticed that the TPM2 Spec volume 3 says TPM2_SetPrimaryPolicy requires an
auth session.
BIOS/platform hierarchy currently use pass word authorization, which does not
require an auth session, so the TPM2_StartAuthSession command is not supported.
Do you know if TPM2_SetPrimaryPolicy will work with password authorization?
thanks
-----Original Message-----
From: Yao, Jiewen [mailto:[email protected]]
Sent: Thursday, November 13, 2014 11:42 PM
To: [email protected]<mailto:[email protected]>
Subject: Re: [edk2] SecurityPkg: TPM2_SetPrimaryPolicy command
Hi Stefan
I think it might OK to add commands to Tpm2CommandLib, as long as there is
valid usage.
Would you please help to describe more on a whole picture on below 2 cases?
E.g. Why and how TPM firmware upgrade use this command in BIOS? Why and how OEM
delegate TPM_RH_PLATFORM role, and for which TPM command, as example?
Do you think TPM2_SetPrimaryPolicy is only missing command, or there are more
needed in above 2 cases? Like TPM2_CreatePrimary?
Thank you
Yao Jiewen
-----Original Message-----
From: [email protected]<mailto:[email protected]>
[mailto:[email protected]]
Sent: Friday, November 14, 2014 12:10 AM
To: [email protected]<mailto:[email protected]>
Subject: [edk2] SecurityPkg: TPM2_SetPrimaryPolicy command
Hello!
Would it be possible to add the command TPM2_SetPrimaryPolicy to
Tpm2CommandLib? The command is required to set platformPolicy and use cases are:
* OEM/BIOS sets platformPolicy to authorize TPM firmware upgrade.
* OEM/BIOS delegates the TPM_RH_PLATFORM role for a specific TPM command.
For further information on the command please refer to chapter 24.3 in
http://www.trustedcomputinggroup.org/files/static_page_files/8C68ADA8-1A4B-B294-D0FC06D3773F7DAA/TPM%20Rev%202.0%20Part%203%20-%20Commands%2001.16-code.pdf.
Regards,
Stefan
Stefan Käser
Infineon Technologies AG
CCS TI SWT SW PC
Staff Engineer Software Development
Phone: +49 (0)821 25851 65
Fax: +49 (0)821 25851 40
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