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ProtectKeyWithCertificateThumbprint method of the Win32_EncryptableVolume class

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The ProtectKeyWithCertificateThumbprint method of the Win32_EncryptableVolume class validates the Enhanced Key Usage (EKU) object identifier (OID) of the provided certificate.

Syntax

uint32 ProtectKeyWithCertificateThumbprint(
  [in, optional] string FriendlyName,
  [in]           string CertThumbprint,
  [out]          string VolumeKeyProtectorID
);

Parameters

FriendlyName [in, optional]

Type: string

A string that specifies a user-assigned string identifier for this key protector. If this parameter is not specified, the FriendlyName parameter is created by using the Subject Name in the certificate.

CertThumbprint [in]

Type: string

A string that specifies the certificate thumbprint.

VolumeKeyProtectorID [out]

Type: string

A string that uniquely identifies the created key protector that can be used to manage this key protector.

If the drive supports hardware encryption and BitLocker has not taken band ownership, the ID string is set to "BitLocker" and the key protector is written to per band metadata.

Return value

Type: uint32

This method returns one of the following codes or another error code if it fails.

Return code/value Description
S_OK
0 (0x0)
 The method was successful.
ERROR_INVALID_DATA
13 (0xD)
 The data is not valid.
FVE_E_NON_BITLOCKER_OID
2150695022 (0x8031006E)
 The EKU attribute of the specified certificate does not permit it to be used for BitLocker Drive Encryption. BitLocker does not require that a certificate have an EKU attribute, but if one is configured, it must be set to an OID that matches the OID configured for BitLocker.
FVE_E_POLICY_USER_CERTIFICATE_NOT_ALLOWED
2150695026 (0x80310072)
 Group Policy does not permit user certificates, such as smart cards, to be used with BitLocker.
FVE_E_POLICY_USER_CERT_MUST_BE_HW
2150695028 (0x80310074)
 Group Policy requires that you supply a smart card to use BitLocker.
FVE_E_POLICY_PROHIBITS_SELFSIGNED
2150695046 (0x80310086)
 Group Policy does not permit the use of self-signed certificates.

 

Remarks

If the OID does not match the one associated with the service controller in the registry, this method fails. This prevents the user from setting data recovery agent (DRA) protectors manually on the volume. DRAs are only to be set by the service.

Requirements

Requirement Value
Minimum supported client
 Windows 7 Enterprise, Windows 7 Ultimate [desktop apps only]
Minimum supported server
 Windows Server 2008 R2 [desktop apps only]
Namespace
 Root\CIMV2\Security\MicrosoftVolumeEncryption
MOF
Win32_encryptablevolume.mof

See also

Win32_EncryptableVolume