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VersionShim
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This commit is contained in:
Xpl0itR 2023-01-17 08:20:25 +00:00
parent 78781791c3
commit a6131ef9ce
Signed by: Xpl0itR
GPG Key ID: 91798184109676AD
5 changed files with 45 additions and 71 deletions
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4
VersionShim/VersionShim.vcxproj
View File

@ -43,7 +43,7 @@
<ClCompile>
<WarningLevel>Level3</WarningLevel>
<SDLCheck>true</SDLCheck>
<PreprocessorDefinitions>_DEBUG;VERSIONSHIM_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>_DEBUG;VERSIONSHIM_EXPORTS;_WINDOWS;_USRDLL;PROJECT_NAME="$(ProjectName)";%(PreprocessorDefinitions)</PreprocessorDefinitions>
<ConformanceMode>true</ConformanceMode>
<PrecompiledHeader>Create</PrecompiledHeader>
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
@ -59,7 +59,7 @@
<FunctionLevelLinking>true</FunctionLevelLinking>
<IntrinsicFunctions>true</IntrinsicFunctions>
<SDLCheck>true</SDLCheck>
<PreprocessorDefinitions>NDEBUG;VERSIONSHIM_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions>NDEBUG;VERSIONSHIM_EXPORTS;_WINDOWS;_USRDLL;PROJECT_NAME="$(ProjectName)";%(PreprocessorDefinitions)</PreprocessorDefinitions>
<ConformanceMode>true</ConformanceMode>
<PrecompiledHeader>Create</PrecompiledHeader>
<PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>

41
VersionShim/dllmain.c
View File

@ -32,35 +32,26 @@ BOOL APIENTRY DllMain(const HMODULE hModule, const DWORD fdwReason, LPCVOID lpRe
if (fdwReason != DLL_PROCESS_ATTACH)
return TRUE;
HANDLE hFile = NULL;
if (!OpenRead("Libraries.txt", &hFile))
return FALSE;
LPCH fileBuf = NULL;
LPCH fileStr = NULL;
DWORD fileLen = 0;
BOOL success = ReadUtf8File(hFile, &fileBuf, &fileLen);
CloseHandle(hFile);
if (!success)
return Error(L"Failed to read Libraries.txt");
if (fileLen > INT_MAX)
return Error(L"Libraries.txt was too large to read");
LPWSTR fileStr = NULL;
success = Utf8ToUtf16(fileBuf, &fileStr, (int)fileLen);
free(fileBuf);
if (!success)
return Error(L"Failed to read Libraries.txt as UTF-16");
LPWSTR end = fileStr + fileLen;
for (LPWSTR dllPath = fileStr; dllPath < end;)
if (!OpenReadFileUtf8("Libraries.txt", &fileStr, &fileLen))
{
int numCharInVal = NextLine(dllPath);
LoadLibrary(dllPath);
dllPath += numCharInVal + 2;
MessageBoxA(NULL, "Failed to read Libraries.txt", PROJECT_NAME, ErrBoxType);
return TRUE;
}
free(fileStr);
int charsInLine;
for (LPCH line = fileStr, fileEnd = fileStr + fileLen; line < fileEnd; line += charsInLine + 2)
{
charsInLine = TerminateLineCrlf(line);
if (!LoadLibraryA(line))
{
MessageBoxA(NULL, line, PROJECT_NAME" - Failed to load library", ErrBoxType);
}
}
HeapFree(GetProcessHeap(), 0, fileStr);
return TRUE;
}

6
VersionShim/pch.h
View File

@ -4,11 +4,7 @@
// 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
#pragma once
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdlib.h>
#endif //PCH_H

53
VersionShim/util.c
View File

@ -1,4 +1,4 @@
// Copyright © 2023 Xpl0itR
// Copyright © 2023 Xpl0itR
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
@ -6,71 +6,60 @@
#include "pch.h"
BOOL Error(const LPWSTR message)
{
MessageBox(NULL, message, L"VersionShim", MB_ICONHAND | MB_OK);
return FALSE;
}
BOOL OpenRead(LPCSTR lpFileName, HANDLE* fileHandle)
BOOL OpenFileRead(const LPCSTR lpFileName, HANDLE* fileHandle)
{
OFSTRUCT ofStruct = { 0 };
HFILE hFile = OpenFile(lpFileName, &ofStruct, OF_READ | OF_PROMPT);
*fileHandle = (HANDLE)hFile;
*fileHandle = (HANDLE)(INT_PTR)hFile;
return hFile != HFILE_ERROR;
}
BOOL ReadUtf8File(const HANDLE fileHandle, LPCH* fileBuffer, DWORD* fileLength)
BOOL ReadFileUtf8(const HANDLE fileHandle, LPCH* fileString, DWORD* fileLength)
{
const DWORD fileLen = GetFileSize(fileHandle, NULL);
DWORD fileLen = GetFileSize(fileHandle, NULL);
*fileLength = fileLen;
LPCH buffer = malloc(fileLen + 1);
HANDLE heap = GetProcessHeap();
LPCH buffer = HeapAlloc(heap, 0, fileLen + 1);
if (!buffer)
return FALSE;
if (!ReadFile(fileHandle, buffer, fileLen, NULL, NULL))
{
free(buffer);
HeapFree(heap, 0, buffer);
return FALSE;
}
buffer[fileLen] = '\0';
*fileBuffer = buffer;
*fileString = buffer;
return TRUE;
}
BOOL Utf8ToUtf16(LPCCH utf8String, const PZPWSTR utf16String, const int length)
BOOL OpenReadFileUtf8(const LPCSTR lpFileName, LPCH* fileString, DWORD* fileLength)
{
LPWSTR string = malloc(length * 2 + 2);
if (!string)
HANDLE hFile = NULL;
if (!OpenFileRead(lpFileName, &hFile))
return FALSE;
if (!MultiByteToWideChar(CP_UTF8, 0, utf8String, length, string, length))
{
free(string);
return FALSE;
}
BOOL success = ReadFileUtf8(hFile, fileString, fileLength);
CloseHandle(hFile);
string[length] = L'\0';
*utf16String = string;
return TRUE;
return success;
}
int NextLine(const LPWSTR text)
INT TerminateLineCrlf(const LPCH fileString)
{
for (int i = 0; ; i++)
for (INT i = 0; ; i++)
{
if (text[i] == L'\r' &&
text[i + 1] == L'\n')
if (fileString[i] == '\r' &&
fileString[i + 1] == '\n')
{
text[i] = text[i + 1] = L'\0';
fileString[i] = fileString[i + 1] = '\0';
}
if (text[i] == L'\0')
if (fileString[i] == '\0')
{
return i;
}

10
VersionShim/util.h
View File

@ -1,8 +1,6 @@
#pragma once
#include "pch.h"
BOOL Error(LPWSTR message);
BOOL OpenRead(LPCSTR lpFileName, HANDLE* fileHandle);
BOOL ReadUtf8File(HANDLE fileHandle, LPCH* fileBuffer, DWORD* fileLength);
BOOL Utf8ToUtf16(LPCCH utf8String, PZPWSTR utf16String, int length);
int NextLine(LPWSTR text);
UINT ErrBoxType = MB_ICONERROR | MB_TOPMOST;
BOOL OpenReadFileUtf8(LPCSTR lpFileName, LPCH* fileBuffer, DWORD* fileLength);
INT TerminateLineCrlf(LPCH fileString);