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Re: [edk2] SecurityPkg: TPM2_SetPrimaryPolicy command

Subject: Re: [edk2] SecurityPkg: TPM2_SetPrimaryPolicy command

From: <Stefan.Kaeser@infineon.com>

To: <edk2-devel@lists.sourceforge.net>

Date: 2014-11-18 01:02:50

Hi Lee,

TPM2_SetPrimaryPolicy can be used with password authorization (same as TPM2_HierarchyControl)

 

Regards,

Stefan

 

From: Rosenbaum, Lee G [mailto:lee.g.rosenbaum@intel.com]
Sent: Friday, November 14, 2014 8:57 PM
To: edk2-devel@lists.sourceforge.net
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:jiewen.yao@intel.com]
Sent: Thursday, November 13, 2014 11:42 PM
To: edk2-devel@lists.sourceforge.net
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: Stefan.Kaeser@infineon.com [mailto:Stefan.Kaeser@infineon.com]

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

To: edk2-devel@lists.sourceforge.net

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 Kser

 

Infineon Technologies AG

CCS TI SWT SW PC

Staff Engineer Software Development

Phone: +49 (0)821 25851 65

Fax:     +49 (0)821 25851 40

stefan.kaeser@infineon.com<mailto:stefan.kaeser@infineon.com>

 

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