SecurityPkg/Library/Tpm12CommandLib/Tpm12Ownership.c

   1 /** @file
   2   Implement TPM1.2 Ownership related command.
   3
   4 Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>
   5 SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include <PiPei.h>
  10 #include <Library/BaseMemoryLib.h>
  11 #include <Library/BaseLib.h>
  12 #include <Library/Tpm12DeviceLib.h>
  13
  14 /**
  15   Send ForceClear command to TPM1.2.
  16
  17   @retval EFI_SUCCESS      Operation completed successfully.
  18   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  19 **/
  20 EFI_STATUS
  21 EFIAPI
  22 Tpm12ForceClear (
  23   VOID
  24   )
  25 {
  26   EFI_STATUS           Status;
  27   TPM_RQU_COMMAND_HDR  Command;
  28   TPM_RSP_COMMAND_HDR  Response;
  29   UINT32               Length;
  30
  31   //
  32   // send Tpm command TPM_ORD_ForceClear
  33   //
  34   Command.tag        = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  35   Command.paramSize  = SwapBytes32 (sizeof (Command));
  36   Command.ordinal    = SwapBytes32 (TPM_ORD_ForceClear);
  37   Length = sizeof (Response);
  38
  39   Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
  40   if (EFI_ERROR (Status)) {
  41     return Status;
  42   }
  43   switch (SwapBytes32 (Response.returnCode)) {
  44   case TPM_SUCCESS:
  45     return EFI_SUCCESS;
  46   default:
  47     return EFI_DEVICE_ERROR;
  48   }
  49 }