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GetEncryptionMethod method of the Win32_EncryptableVolume class

The GetEncryptionMethod method of the Win32_EncryptableVolume class indicates the encryption algorithm and key size used on the volume.

Syntax

mof


uint32 GetEncryptionMethod(
  [out]  uint32 EncryptionMethod,
  [out]  string SelfEncryptionDriveEncryptionMethod
);

Parameters

EncryptionMethod [out]

Type: uint32

An unsigned integer that specifies the encryption algorithm and key size used on the volume.

Value	Meaning
None 0	The volume is not encrypted.
AES_128_WITH_DIFFUSER 1	The volume has been fully or partially encrypted with the Advanced Encryption Standard (AES) algorithm enhanced with a diffuser layer, using an AES key size of 128 bits.
AES_256_WITH_DIFFUSER 2	The volume has been fully or partially encrypted with the Advanced Encryption Standard (AES) algorithm enhanced with a diffuser layer, using an AES key size of 256 bits.
AES_128 3	The volume has been fully or partially encrypted with the Advanced Encryption Standard (AES) algorithm, using an AES key size of 128 bits.
AES_256 4	The volume has been fully or partially encrypted with the Advanced Encryption Standard (AES) algorithm, using an AES key size of 256 bits.
HARDWARE_ENCRYPTION 5	The volume has been fully or partially encrypted by using the hardware capabilities of the drive.
(uint32)–1	UNKNOWN The volume has been fully or partially encrypted with an unknown algorithm and key size.

SelfEncryptionDriveEncryptionMethod [out]

Type: string

The encryption algorithm is configured on the self-encrypting drive. A null string means that either BitLocker is using software encryption or no encryption method is reported.

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.

Remarks

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

Minimum supported client	Windows Vista Enterprise, Windows Vista Ultimate [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Namespace	\\.\root\CIMV2\Security\MicrosoftVolumeEncryption
MOF	Win32_encryptablevolume.mof

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