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]
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:  <mailto:[email protected]> [email protected] [
<mailto:[email protected]> mailto:[email protected]] 

Sent: Friday, November 14, 2014 12:10 AM

To:  <mailto:[email protected]>
[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>
http://www.trustedcomputinggroup.org/files/static_page_files/8C68ADA8-1A4B-B
294-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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[email protected]<mailto:[email protected]>

 

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