OUT UINT8()

in DfciPkg/IdentityAndAuthManager/CertSupport.c [291:344]
46 lines of code
9 McCabe index (conditional complexity)

  OUT       UINT8    (*CertDigest)[SHA1_FINGERPRINT_DIGEST_SIZE])
{
  VOID      *Sha1Ctx= NULL;
  UINTN     CtxSize;
  BOOLEAN   Flag = FALSE;
  EFI_STATUS Status;

  if ((TrustedCert == NULL) || (CertLength == 0) || (CertDigest == NULL))
  {
    DEBUG((DEBUG_ERROR, "%a: Invalid input parameters.\n", __FUNCTION__));
    return EFI_INVALID_PARAMETER;
  }

  //Thumbprint is nothing but SHA1 Digest. There are no library functions available to read this from X509 Cert.
  CtxSize = Sha1GetContextSize();
  Sha1Ctx = AllocatePool(CtxSize);
  if (Sha1Ctx == NULL)
  {
    DEBUG((DEBUG_ERROR, "%a: Failed to allocate Sha1Ctx.\n", __FUNCTION__));
    Status = EFI_OUT_OF_RESOURCES;
    goto CLEANUP;
  }

  Status = EFI_ABORTED;
  Flag = Sha1Init(Sha1Ctx);
  if (!Flag)
  {
    DEBUG((DEBUG_ERROR, "%a: Failed to Sha1Init.\n", __FUNCTION__));
    goto CLEANUP;
  }

  Flag = Sha1Update(Sha1Ctx, TrustedCert, CertLength);
  if (!Flag)
  {
    DEBUG((DEBUG_ERROR, "%a: Failed to Sha1Update.\n", __FUNCTION__));
    goto CLEANUP;
  }

  Flag = Sha1Final(Sha1Ctx, (UINT8 *) CertDigest);
  if (!Flag)
  {
    DEBUG((DEBUG_ERROR, "%a: Failed to Sha1Final.\n", __FUNCTION__));
    goto CLEANUP;
  }
  Status = EFI_SUCCESS;


CLEANUP:
  if (Sha1Ctx)
  {
    FreePool(Sha1Ctx);
  }
  return Status;
}