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 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <PiPei.h>
  16 #include <Library/BaseMemoryLib.h>
  17 #include <Library/BaseLib.h>
  18 #include <Library/Tpm12DeviceLib.h>
  19
  20 /**
  21   Send ForceClear command to TPM1.2.
  22
  23   @retval EFI_SUCCESS      Operation completed successfully.
  24   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  25 **/
  26 EFI_STATUS
  27 EFIAPI
  28 Tpm12ForceClear (
  29   VOID
  30   )
  31 {
  32   EFI_STATUS           Status;
  33   TPM_RQU_COMMAND_HDR  Command;
  34   TPM_RSP_COMMAND_HDR  Response;
  35   UINT32               Length;
  36
  37   //
  38   // send Tpm command TPM_ORD_ForceClear
  39   //
  40   Command.tag        = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  41   Command.paramSize  = SwapBytes32 (sizeof (Command));
  42   Command.ordinal    = SwapBytes32 (TPM_ORD_ForceClear);
  43   Length = sizeof (Response);
  44
  45   Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
  46   if (EFI_ERROR (Status)) {
  47     return Status;
  48   }
  49   switch (SwapBytes32 (Response.returnCode)) {
  50   case TPM_SUCCESS:
  51     return EFI_SUCCESS;
  52   default:
  53     return EFI_DEVICE_ERROR;
  54   }
  55 }