/** @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

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