/** @file
  This library abstract TPM2 hash calculation.
  The platform can choose multiply hash, while caller just need invoke these API.
  Then all hash value will be returned and/or extended.

Copyright (c) 2013 - 2016, Intel Corporation. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _HASH_LIB_H_
#define _HASH_LIB_H_

#include <Uefi.h>
#include <Protocol/Hash.h>
#include <IndustryStandard/Tpm20.h>
typedef UINTN HASH_HANDLE;

/**
  Start hash sequence.

  @param HashHandle Hash handle.

  @retval EFI_SUCCESS          Hash sequence start and HandleHandle returned.
  @retval EFI_OUT_OF_RESOURCES No enough resource to start hash.
**/
EFI_STATUS
EFIAPI
HashStart (
  OUT HASH_HANDLE  *HashHandle
  );

/**
  Update hash sequence data.

  @param HashHandle    Hash handle.
  @param DataToHash    Data to be hashed.
  @param DataToHashLen Data size.

  @retval EFI_SUCCESS     Hash sequence updated.
**/
EFI_STATUS
EFIAPI
HashUpdate (
  IN HASH_HANDLE  HashHandle,
  IN VOID         *DataToHash,
  IN UINTN        DataToHashLen
  );

/**
  Hash sequence complete and extend to PCR.

  @param HashHandle    Hash handle.
  @param PcrIndex      PCR to be extended.
  @param DataToHash    Data to be hashed.
  @param DataToHashLen Data size.
  @param DigestList    Digest list.

  @retval EFI_SUCCESS     Hash sequence complete and DigestList is returned.
**/
EFI_STATUS
EFIAPI
HashCompleteAndExtend (
  IN HASH_HANDLE          HashHandle,
  IN TPMI_DH_PCR          PcrIndex,
  IN VOID                 *DataToHash,
  IN UINTN                DataToHashLen,
  OUT TPML_DIGEST_VALUES  *DigestList
  );

/**
  Hash data and extend to PCR.

  @param PcrIndex      PCR to be extended.
  @param DataToHash    Data to be hashed.
  @param DataToHashLen Data size.
  @param DigestList    Digest list.

  @retval EFI_SUCCESS     Hash data and DigestList is returned.
**/
EFI_STATUS
EFIAPI
HashAndExtend (
  IN TPMI_DH_PCR          PcrIndex,
  IN VOID                 *DataToHash,
  IN UINTN                DataToHashLen,
  OUT TPML_DIGEST_VALUES  *DigestList
  );

/**
  Start hash sequence.

  @param HashHandle Hash handle.

  @retval EFI_SUCCESS          Hash sequence start and HandleHandle returned.
  @retval EFI_OUT_OF_RESOURCES No enough resource to start hash.
**/
typedef
EFI_STATUS
(EFIAPI *HASH_INIT)(
  OUT HASH_HANDLE    *HashHandle
  );

/**
  Update hash sequence data.

  @param HashHandle    Hash handle.
  @param DataToHash    Data to be hashed.
  @param DataToHashLen Data size.

  @retval EFI_SUCCESS     Hash sequence updated.
**/
typedef
EFI_STATUS
(EFIAPI *HASH_UPDATE)(
  IN HASH_HANDLE    HashHandle,
  IN VOID           *DataToHash,
  IN UINTN          DataToHashLen
  );

/**
  Complete hash sequence complete.

  @param HashHandle    Hash handle.
  @param DigestList    Digest list.

  @retval EFI_SUCCESS     Hash sequence complete and DigestList is returned.
**/
typedef
EFI_STATUS
(EFIAPI *HASH_FINAL)(
  IN HASH_HANDLE         HashHandle,
  OUT TPML_DIGEST_VALUES *DigestList
  );

#define HASH_ALGORITHM_SHA1_GUID    EFI_HASH_ALGORITHM_SHA1_GUID
#define HASH_ALGORITHM_SHA256_GUID  EFI_HASH_ALGORITHM_SHA256_GUID
#define HASH_ALGORITHM_SHA384_GUID  EFI_HASH_ALGORITHM_SHA384_GUID
#define HASH_ALGORITHM_SHA512_GUID  EFI_HASH_ALGORITHM_SHA512_GUID
#define HASH_ALGORITHM_SM3_256_GUID \
  { \
    0x251C7818, 0x0DBF, 0xE619, { 0x7F, 0xC2, 0xD6, 0xAC, 0x43, 0x42, 0x7D, 0xA3 } \
  }

typedef struct {
  EFI_GUID       HashGuid;
  HASH_INIT      HashInit;
  HASH_UPDATE    HashUpdate;
  HASH_FINAL     HashFinal;
} HASH_INTERFACE;

/**
  This service register Hash.

  @param HashInterface  Hash interface

  @retval EFI_SUCCESS          This hash interface is registered successfully.
  @retval EFI_UNSUPPORTED      System does not support register this interface.
  @retval EFI_ALREADY_STARTED  System already register this interface.
**/
EFI_STATUS
EFIAPI
RegisterHashInterfaceLib (
  IN HASH_INTERFACE  *HashInterface
  );

#endif
