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Set-TpmOwnerAuth

  • Reference
Module:
TrustedPlatformModule

Changes the TPM owner authorization value.

Syntax

Set-TpmOwnerAuth
   -File <String>
   -NewOwnerAuthorization <String>
   [<CommonParameters>]
Set-TpmOwnerAuth
   -File <String>
   -NewFile <String>
   [<CommonParameters>]
Set-TpmOwnerAuth
   [[-OwnerAuthorization] <String>]
   -NewFile <String>
   [<CommonParameters>]
Set-TpmOwnerAuth
   [[-OwnerAuthorization] <String>]
   -NewOwnerAuthorization <String>
   [<CommonParameters>]

Description

The Set-TpmOwnerAuth cmdlet changes the current owner authorization value of the Trusted Platform Module (TPM) to a new value. You can specify the current owner authorization value or specify a file that contains the current owner authorization value. If you do not specify an owner authorization value, the cmdlet attempts to read the value from the registry.

Use the ConvertTo-TpmOwnerAuth cmdlet to create an owner authorization value. You can specify a new owner authorization value or specify a file that contains the new value.

An owner authorization file is not a simply a password. It is generated for a specific system. For more information on TPM, see the Trusted Platform Module Technology Overview in the Technet library.

Examples

Example 1: Replace imported owner authorization value

PS C:\> Set-TpmOwnerAuth -NewOwnerAuthorization "h4FCmNeWVNp5IMHxRfFL9QEq4vM="
TpmReady           : True
TpmPresent         : True
ManagedAuthLevel   : Full
OwnerAuth          : h4FCmNeWVNp5IMHxRfFL9QEq4vM=
OwnerClearDisabled : True
AutoProvisioning   : DisabledForNextBoot
LockedOut          : False
SelfTest           : {191, 191, 245, 191...}

This command replaces the current owner authorization value with the specified owner authorization value. The command does not specify the current owner authorization value, so the cmdlet attempts to find it in the registry. This command does not import the owner authorization value into the registry. After you run this command, you can use the Import-TpmOwnerAuth cmdlet to import the new value into the registry, if necessary.

Example 2: Replace owner authorization value with value in file

PS C:\> Set-TpmOwnerAuth -NewFile "NewOwnerAuth.tpm"
TpmReady           : True
TpmPresent         : True
ManagedAuthLevel   : Full
OwnerAuth          : h4FCmNeWVNp5IMHxRfFL9QEq4vM=
OwnerClearDisabled : True
AutoProvisioning   : DisabledForNextBoot
LockedOut          : False
SelfTest           : {191, 191, 245, 191...}

This command replaces the current owner authorization value with the owner authorization value in the specified file.

Example 3: Replace owner authorization value

PS C:\> Set-TpmOwnerAuth -OwnerAuthorization "oaVq17hNcFS2KSnHwpZa4AlrWBo=" -NewOwnerAuthorization "h4FCmNeWVNp5IMHxRfFL9QEq4vM="
TpmReady           : True
TpmPresent         : True
ManagedAuthLevel   : Full
OwnerAuth          : h4FCmNeWVNp5IMHxRfFL9QEq4vM=
OwnerClearDisabled : True
AutoProvisioning   : DisabledForNextBoot
LockedOut          : False
SelfTest           : {191, 191, 245, 191...}

This command replaces the specified owner authorization value with a new owner authorization value.

Parameters

-File

Specifies a file that contains the current owner authorization value for the TPM. You can use the TPM Management Console to create this file.

Type:String
Position:Named
Default value:None
Required:True
Accept pipeline input:False
Accept wildcard characters:False

-NewFile

Specifies a file that contains the new owner authorization value for a TPM.

Type:String
Aliases:nf
Position:Named
Default value:None
Required:True
Accept pipeline input:False
Accept wildcard characters:False

-NewOwnerAuthorization

Specifies a new owner authorization value for a TPM.

Type:String
Aliases:no
Position:Named
Default value:None
Required:True
Accept pipeline input:True
Accept wildcard characters:False

-OwnerAuthorization

Specifies the current owner authorization value for a TPM.

Type:String
Aliases:o
Position:0
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

Inputs

String

This cmdlet accepts the owner authorization value for the TPM.

Outputs

TpmObject

This cmdlet returns a TpmObject object contains the following information:

  • TpmReady. Whether a TPM complies with Windows Server® 2012 standards.
  • TpmPresent. Whether there is a TMP on the current computer.
  • ManagedAuthLevel. The level at which the operating system manages the owner authorization. Possible values are Legacy, Balanced, and Full.
  • OwnerClearDisabled. Whether TPM can be reset. If this value is True, the TPM cannot be reset through the operating system by using the owner authorization value. If this value is False, the TPM can be reset through the operating system.
  • AutoProvisioning. Whether the computer can use auto-provisioning. Possible values are NotDefined, Enabled, Disabled, and DisabledForNextBoot.
  • LockedOut. Whether a TPM is locked out.
  • SelfTest. Information returned by a test that TPM runs.