SecurityPkg/Library/TpmCommLib/TpmComm.c

   1 /** @file
   2   Basic TPM command functions.
   3
   4 Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved.<BR>
   5 SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include "CommonHeader.h"
  10
  11 /**
  12   Single function calculates SHA1 digest value for all raw data. It
  13   combines Sha1Init(), Sha1Update() and Sha1Final().
  14
  15   @param[in]  Data          Raw data to be digested.
  16   @param[in]  DataLen       Size of the raw data.
  17   @param[out] Digest        Pointer to a buffer that stores the final digest.
  18
  19   @retval     EFI_SUCCESS   Always successfully calculate the final digest.
  20 **/
  21 EFI_STATUS
  22 EFIAPI
  23 TpmCommHashAll (
  24   IN  CONST UINT8                   *Data,
  25   IN        UINTN                   DataLen,
  26   OUT       TPM_DIGEST              *Digest
  27   )
  28 {
  29   VOID     *Sha1Ctx;
  30   UINTN    CtxSize;
  31
  32   CtxSize = Sha1GetContextSize ();
  33   Sha1Ctx = AllocatePool (CtxSize);
  34   ASSERT (Sha1Ctx != NULL);
  35
  36   Sha1Init (Sha1Ctx);
  37   Sha1Update (Sha1Ctx, Data, DataLen);
  38   Sha1Final (Sha1Ctx, (UINT8 *)Digest);
  39
  40   FreePool (Sha1Ctx);
  41
  42   return EFI_SUCCESS;
  43 }
  44