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1/** @file\r
2 NULL PlatformSecureLib instance does NOT really detect whether a physical present\r
3 user exists but return TRUE directly. This instance can be used to verify security\r
4 related features during platform enabling and development. It should be replaced\r
5 by a platform-specific method(e.g. Button pressed) in a real platform for product.\r
6\r
7Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>\r
8SPDX-License-Identifier: BSD-2-Clause-Patent\r
9\r
10**/\r
11\r
12#include <Uefi/UefiBaseType.h>\r
13\r
14BOOLEAN mUserPhysicalPresence = FALSE;\r
15\r
16/**\r
17\r
18 This function provides a platform-specific method to detect whether the platform\r
19 is operating by a physically present user.\r
20\r
21 Programmatic changing of platform security policy (such as disable Secure Boot,\r
22 or switch between Standard/Custom Secure Boot mode) MUST NOT be possible during\r
23 Boot Services or after exiting EFI Boot Services. Only a physically present user\r
24 is allowed to perform these operations.\r
25\r
26 NOTE THAT: This function cannot depend on any EFI Variable Service since they are\r
27 not available when this function is called in AuthenticateVariable driver.\r
28\r
29 @retval TRUE The platform is operated by a physically present user.\r
30 @retval FALSE The platform is NOT operated by a physically present user.\r
31\r
32**/\r
33BOOLEAN\r
34EFIAPI\r
35UserPhysicalPresent (\r
36 VOID\r
37 )\r
38{\r
39 return mUserPhysicalPresence;\r
40}\r
41\r
42/**\r
43 Save user physical presence state from a PCD to mUserPhysicalPresence.\r
44\r
45 @retval EFI_SUCCESS PcdUserPhysicalPresence is got successfully.\r
46\r
47**/\r
48RETURN_STATUS\r
49EFIAPI\r
50PlatformSecureLibNullConstructor (\r
51 VOID\r
52 )\r
53{\r
54 mUserPhysicalPresence = PcdGetBool (PcdUserPhysicalPresence);\r
55\r
56 return RETURN_SUCCESS;\r
57}\r