SetPhysicalPresenceRequest method of the Win32_Tpm class

The SetPhysicalPresenceRequest method of the Win32_Tpm class requests a TPM operation that requires physical presence. After you have used this method to submit a request, apply the next step indicated in the GetPhysicalPresenceTransition method. Finally, use the GetPhysicalPresenceResponse method to check whether the operation ran successfully. This method suspends BitLocker if calling could cause BitLocker recovery to be required. BitLocker would automatically resume once TPM has been provisioned.

These steps are necessary because physical presence operations can run only after the computer has detected the physically present user.

Syntax

uint32 SetPhysicalPresenceRequest( [in] uint32 Request ); 

Parameters

Type: uint32

An integer value that specifies the requested TPM operation that requires physical presence.

Return value

Type: uint32

All TPM errors as well as errors specific to TPM Base Services can be returned.

Remarks

TPM physical presence operations do not require TPM owner authorization. However, they do require additional steps to help protect against unauthorized changes to the TPM.

Computers that support TPM physical presence operations will attempt to detect the physically present user before running the operation. While computers may differ in how this detection is performed, the idea is to have a physically present user or administrator authorize the operation.

For example, the computer may require the user to restart the computer. After the computer is restarted, the computer can display a BIOS confirmation dialog box that allows the user to confirm the operation by using the keyboard.

Managed Object Format (MOF) files contain the definitions for Windows Management Instrumentation (WMI) classes. MOF files are not installed as part of the Windows SDK. They are installed on the server when you add the associated role by using the Server Manager. For more information about MOF files, see Managed Object Format (MOF).

Requirements