/** @file | |
NULL PlatformSecureLib instance does NOT really detect whether a physical present | |
user exists but return TRUE directly. This instance can be used to verify security | |
related features during platform enabling and development. It should be replaced | |
by a platform-specific method(e.g. Button pressed) in a real platform for product. | |
Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include <Uefi/UefiBaseType.h> | |
BOOLEAN mUserPhysicalPresence = FALSE; | |
/** | |
This function provides a platform-specific method to detect whether the platform | |
is operating by a physically present user. | |
Programmatic changing of platform security policy (such as disable Secure Boot, | |
or switch between Standard/Custom Secure Boot mode) MUST NOT be possible during | |
Boot Services or after exiting EFI Boot Services. Only a physically present user | |
is allowed to perform these operations. | |
NOTE THAT: This function cannot depend on any EFI Variable Service since they are | |
not available when this function is called in AuthenticateVariable driver. | |
@retval TRUE The platform is operated by a physically present user. | |
@retval FALSE The platform is NOT operated by a physically present user. | |
**/ | |
BOOLEAN | |
EFIAPI | |
UserPhysicalPresent ( | |
VOID | |
) | |
{ | |
return mUserPhysicalPresence; | |
} | |
/** | |
Save user physical presence state from a PCD to mUserPhysicalPresence. | |
@retval EFI_SUCCESS PcdUserPhysicalPresence is got successfully. | |
**/ | |
RETURN_STATUS | |
EFIAPI | |
PlatformSecureLibNullConstructor ( | |
VOID | |
) | |
{ | |
mUserPhysicalPresence = PcdGetBool(PcdUserPhysicalPresence); | |
return RETURN_SUCCESS; | |
} |