SecurityPkg/Include/Ppi/FirmwareVolumeInfoPrehashedFV.h

   1 /** @file
   2 PPI to describe all hash digests for a given FV
   3
   4 Copyright (c) 2017, Microsoft Corporation
   5 Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
   6
   7 SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9 **/
  10
  11 #ifndef __PEI_FIRMWARE_VOLUME_INFO_PREHASHED_FV_H__
  12 #define __PEI_FIRMWARE_VOLUME_INFO_PREHASHED_FV_H__
  13
  14 #define EDKII_PEI_FIRMWARE_VOLUME_INFO_PREHASHED_FV_PPI_GUID \
  15  { 0x3ce1e631, 0x7008, 0x477c, { 0xad, 0xa7, 0x5d, 0xcf, 0xc7, 0xc1, 0x49, 0x4b } }
  16
  17 //
  18 // HashAlgoId is TPM_ALG_ID in Tpm20.h
  19 //
  20 typedef struct _HASH_INFO {
  21   UINT16    HashAlgoId;
  22   UINT16    HashSize;
  23   // UINT8                                    Hash[];
  24 } HASH_INFO;
  25
  26 //
  27 // This PPI carries prehashsed data for one FV.  Platform should ensure 1:1 mapping between pre-hashed PPI and corresponding FV.
  28 // The Count field in PPI is followed by Count number of FV hash info entries, which can be extended to PCR and logged to TCG event log directly by TCG modules.
  29 // TCG module checks TPM required hash algorithms(PcdTpm2HashMask) with each pre-hashed PPIs
  30 //   For each pre-hashed PPI
  31 //     If PPI carries hash generated by equivalent or larger algorithm set than TPM required, directly use PPI
  32 //     else, drops PPI data and calculate all hash again
  33 //
  34 typedef struct {
  35   UINT32    FvBase;
  36   UINT32    FvLength;
  37   UINT32    Count;
  38   // HASH_INFO                                HashInfo[];
  39 } EDKII_PEI_FIRMWARE_VOLUME_INFO_PREHASHED_FV_PPI;
  40
  41 extern EFI_GUID  gEdkiiPeiFirmwareVolumeInfoPrehashedFvPpiGuid;
  42
  43 #endif