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Set-TpmOwnerAuth

Updated: October 29, 2012

Applies To: Windows Server 2012

Set-TpmOwnerAuth

Changes the TPM owner authorization value.

Syntax

Parameter Set: NewFile File
Set-TpmOwnerAuth -File <String> -NewFile <String> [ <CommonParameters>]

Parameter Set: NewFile OwnerAuth
Set-TpmOwnerAuth [[-OwnerAuthorization] <String> ] -NewFile <String> [ <CommonParameters>]

Parameter Set: NewOwnerAuth File
Set-TpmOwnerAuth -File <String> -NewOwnerAuthorization <String> [ <CommonParameters>]

Parameter Set: NewOwnerAuth OwnerAuth
Set-TpmOwnerAuth [[-OwnerAuthorization] <String> ] -NewOwnerAuthorization <String> [ <CommonParameters>]




Detailed 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 at http://technet.microsoft.com/en-us/library/jj131725.aspx.

Parameters

-File<String>

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


Aliases

none

Required?

true

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-NewFile<String>

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


Aliases

none

Required?

true

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

-NewOwnerAuthorization<String>

Specifies a new owner authorization value for a TPM.


Aliases

none

Required?

true

Position?

named

Default Value

none

Accept Pipeline Input?

true (ByValue)

Accept Wildcard Characters?

false

-OwnerAuthorization<String>

Specifies the current owner authorization value for a TPM.


Aliases

none

Required?

false

Position?

1

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

<CommonParameters>

This cmdlet supports the common parameters: -Verbose, -Debug, -ErrorAction, -ErrorVariable, -OutBuffer, and -OutVariable. For more information, see    about_CommonParameters.

Inputs

The input type is the type of the objects that you can pipe to the cmdlet.

  • String

    The owner authorization value for the TPM.


Outputs

The output type is the type of the objects that the cmdlet emits.

  • TpmObject

    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.


Examples

Example 1: Replace imported owner authorization value

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.


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...}

Example 2: Replace owner authorization value with value in file

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

Example 3: Replace owner authorization value

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

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