HashInstanceLibSha512.c

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#include <PiPei.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseCryptLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/HashLib.h>
 
VOID
Tpm2SetSha512ToDigestList (
  IN TPML_DIGEST_VALUES  *DigestList,
  IN UINT8               *Sha512Digest
  )
{
  DigestList->count              = 1;
  DigestList->digests[0].hashAlg = TPM_ALG_SHA512;
  CopyMem (
    DigestList->digests[0].digest.sha512,
    Sha512Digest,
    SHA512_DIGEST_SIZE
    );
}
 
EFI_STATUS
EFIAPI
Sha512HashInit (
  OUT HASH_HANDLE  *HashHandle
  )
{
  VOID   *Sha512Ctx;
  UINTN  CtxSize;
 
  CtxSize   = Sha512GetContextSize ();
  Sha512Ctx = AllocatePool (CtxSize);
  ASSERT (Sha512Ctx != NULL);
 
  Sha512Init (Sha512Ctx);
 
  *HashHandle = (HASH_HANDLE)Sha512Ctx;
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
Sha512HashUpdate (
  IN HASH_HANDLE  HashHandle,
  IN VOID         *DataToHash,
  IN UINTN        DataToHashLen
  )
{
  VOID  *Sha512Ctx;
 
  Sha512Ctx = (VOID *)HashHandle;
  Sha512Update (Sha512Ctx, DataToHash, DataToHashLen);
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
Sha512HashFinal (
  IN HASH_HANDLE          HashHandle,
  OUT TPML_DIGEST_VALUES  *DigestList
  )
{
  UINT8  Digest[SHA512_DIGEST_SIZE];
  VOID   *Sha512Ctx;
 
  Sha512Ctx = (VOID *)HashHandle;
  Sha512Final (Sha512Ctx, Digest);
 
  FreePool (Sha512Ctx);
 
  Tpm2SetSha512ToDigestList (DigestList, Digest);
 
  return EFI_SUCCESS;
}
 
HASH_INTERFACE  mSha512InternalHashInstance = {
  HASH_ALGORITHM_SHA512_GUID,
  Sha512HashInit,
  Sha512HashUpdate,
  Sha512HashFinal,
};
 
EFI_STATUS
EFIAPI
HashInstanceLibSha512Constructor (
  VOID
  )
{
  EFI_STATUS  Status;
 
  Status = RegisterHashInterfaceLib (&mSha512InternalHashInstance);
  if ((Status == EFI_SUCCESS) || (Status == EFI_UNSUPPORTED)) {
    //
    // Unsupported means platform policy does not need this instance enabled.
    //
    return EFI_SUCCESS;
  }
 
  return Status;
}