public override List<SystemIdentifier> GetIdentifiers()

Public Overrides Function GetIdentifiers As List(Of SystemIdentifier)

public:
virtual List<SystemIdentifier^>^ GetIdentifiers() override

Return Value

This method performs the following operations: 1. Initializes the TPM service and loads TBS (TPM Base Services) functions 2. Detects TPM version (1.2 or 2.0) if available 3. Creates a TBS context for TPM communication 4. Extracts the endorsement key using appropriate commands for the TPM version 5. Returns the public key portion as a TpmIdentifier

The method handles various failure scenarios gracefully: - Systems without TPM hardware - TPM disabled in BIOS/UEFI - TPM locked or in use by other applications - Communication failures with the TPM

For security and privacy, only the hash of the TPM public key is stored in the identifier, not the raw key material. This is handled automatically by the base SystemIdentifier class.

Note
TPM operations may take several hundred milliseconds to complete due to: - Hardware communication latency - Cryptographic operations within the TPM - TBS service coordination with other applications Consider caching the result if calling this method frequently.

Reference