mirror of https://github.com/acidanthera/audk.git
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/** @file
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Handle TPM 2.0 physical presence requests from OS.
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This library will handle TPM 2.0 physical presence request from OS.
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Caution: This module requires additional review when modified.
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This driver will have external input - variable.
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This external input must be validated carefully to avoid security issue.
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Tcg2PhysicalPresenceLibSubmitRequestToPreOSFunction() and Tcg2PhysicalPresenceLibGetUserConfirmationStatusFunction()
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will receive untrusted input and do validation.
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Copyright (c) 2015 - 2024, Intel Corporation. All rights reserved.<BR>
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Copyright (c) Microsoft Corporation.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiMm.h>
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#include <Library/HobLib.h>
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#include "MmTcg2PhysicalPresenceLibCommon.h"
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/**
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The constructor function locates SmmVariable protocol.
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It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor successfully added string package.
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@retval Other value The constructor can't add string package.
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**/
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EFI_STATUS
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EFIAPI
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Tcg2PhysicalPresenceLibStandaloneMmConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_MM_SYSTEM_TABLE *SystemTable
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)
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{
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return Tcg2PhysicalPresenceLibCommonConstructor ();
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}
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/**
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Check if Tcg2 PP version is lower than PP_INF_VERSION_1_3.
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@retval TRUE Tcg2 PP version is lower than PP_INF_VERSION_1_3.
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@retval Other Tcg2 PP version is not lower than PP_INF_VERSION_1_3.
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**/
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BOOLEAN
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IsTcg2PPVerLowerThan_1_3 (
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VOID
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)
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{
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VOID *GuidHob;
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GuidHob = GetFirstGuidHob (&gEdkiiTcgPhysicalPresenceInterfaceVerHobGuid);
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ASSERT (GuidHob != NULL);
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if (AsciiStrnCmp (PP_INF_VERSION_1_2, (CHAR8 *)GET_GUID_HOB_DATA (GuidHob), sizeof (PP_INF_VERSION_1_2) - 1) >= 0) {
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return TRUE;
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}
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return FALSE;
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}
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