+ LOCK_SUCCESS = 0, // Success.
+ LOCK_NOT_READY = 1, // Backend/TPM still initializing.
+ LOCK_TIMEOUT = 2, // Backend/TPM timed out.
+ LOCK_BACKEND_INVALID = 3, // Backend failed to initialize.
+ LOCK_ALREADY_LOCKED = 4, // TPM has already been locked.
+ LOCK_SET_ERROR = 5, // Failed to set attributes.
+ LOCK_FINALIZE_ERROR = 6, // Backend failed to lock.
+ LOCK_READBACK_ERROR = 7, // Inconsistency reading back registration data.
+ LOCK_WRONG_DOMAIN = 8, // Device already registered to another domain.