OvmfPkg/Library/PlatformSecureLib/PlatformSecureLib.c

   1 /** @file
   2   Provides a platform-specific method to enable Secure Boot Custom Mode setup.
   3
   4   Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14 #include <Library/PcdLib.h>
  15
  16 /**
  17
  18   This function detects whether a secure platform-specific method to clear PK(Platform Key)
  19   is configured by platform owner. This method is provided for users force to clear PK
  20   in case incorrect enrollment mis-haps.
  21
  22   UEFI231 spec chapter 27.5.2 stipulates: The platform key may also be cleared using
  23   a secure platform-specific method. In  this case, the global variable SetupMode
  24   must also be updated to 1.
  25
  26   NOTE THAT: This function cannot depend on any EFI Variable Service since they are
  27   not available when this function is called in AuthenticateVariable driver.
  28
  29   @retval  TRUE       The Platform owner wants to force clear PK.
  30   @retval  FALSE      The Platform owner doesn't want to force clear PK.
  31
  32 **/
  33 BOOLEAN
  34 EFIAPI
  35 ForceClearPK (
  36   VOID
  37   )
  38 {
  39     return TRUE;
  40 }
  41
  42 /**
  43
  44   This function detects whether current platform is operated by a physical present user.
  45
  46   @retval  TRUE       The Platform is operated by a physical present user.
  47   @retval  FALSE      The Platform is NOT operated by a physical persent user.
  48
  49 **/
  50 BOOLEAN
  51 EFIAPI
  52 UserPhysicalPresent (
  53   VOID
  54   )
  55 {
  56   return TRUE;
  57 }