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 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 "CommonHeader.h"
  16
  17 /**
  18   Single function calculates SHA1 digest value for all raw data. It
  19   combines Sha1Init(), Sha1Update() and Sha1Final().
  20
  21   @param[in]  Data          Raw data to be digested.
  22   @param[in]  DataLen       Size of the raw data.
  23   @param[out] Digest        Pointer to a buffer that stores the final digest.
  24
  25   @retval     EFI_SUCCESS   Always successfully calculate the final digest.
  26 **/
  27 EFI_STATUS
  28 EFIAPI
  29 TpmCommHashAll (
  30   IN  CONST UINT8                   *Data,
  31   IN        UINTN                   DataLen,
  32   OUT       TPM_DIGEST              *Digest
  33   )
  34 {
  35   VOID     *Sha1Ctx;
  36   UINTN    CtxSize;
  37
  38   CtxSize = Sha1GetContextSize ();
  39   Sha1Ctx = AllocatePool (CtxSize);
  40   ASSERT (Sha1Ctx != NULL);
  41
  42   Sha1Init (Sha1Ctx);
  43   Sha1Update (Sha1Ctx, Data, DataLen);
  44   Sha1Final (Sha1Ctx, (UINT8 *)Digest);
  45
  46   FreePool (Sha1Ctx);
  47
  48   return EFI_SUCCESS;
  49 }
  50