106 lines
2.4 KiB
C++
106 lines
2.4 KiB
C++
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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WinG32SysToSys32.cpp
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Abstract:
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During its dllmain WinG32 checks its install location. It does this by parsing the path returned from
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GetModuleFileName. If it finds that it was installed in the system directory, it will post a message box
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and fail. This is fixed by checking and tweaking the string returned from the API call.
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History:
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03/21/2001 alexsm Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(WinG32SysToSys32)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(GetModuleFileNameA)
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APIHOOK_ENUM_END
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DWORD
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APIHOOK(GetModuleFileNameA)(HMODULE hModule, LPSTR lpFileName, DWORD nSize)
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{
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DWORD nReturn = 0;
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int nFound = -1;
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char * lpNewFileName = NULL;
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WCHAR * lpSystemCheck = L"SYSTEM\\WING32.DLL";
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WCHAR * lpWinG32 = L"WING32.dll";
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CString csOldFileName;
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CString csNewFileName;
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nReturn = ORIGINAL_API(GetModuleFileNameA)(hModule, lpFileName, nSize);
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// Do nothing on failure.
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if( 0 == nReturn || nReturn >= nSize )
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{
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return nReturn;
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}
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// Check the string. If the string is not pointing to system32, we need to redirect.
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CSTRING_TRY
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{
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csOldFileName = lpFileName;
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csOldFileName.MakeUpper();
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nFound = csOldFileName.Find(lpSystemCheck);
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}
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CSTRING_CATCH
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{
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// Do Nothing
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}
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if(nFound >= 0)
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{
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DPFN(
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eDbgLevelInfo,
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"[WinG32SysToSys32] Changing system\\wing32.dll to system32\\wing32.dll");
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CSTRING_TRY
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{
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csNewFileName.GetSystemDirectoryW();
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csNewFileName.AppendPath(lpWinG32);
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lpNewFileName = csNewFileName.GetAnsiNIE();
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if(lpNewFileName && nSize > (unsigned int)csNewFileName.GetLength())
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{
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nReturn = csNewFileName.GetLength();
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memcpy(lpFileName, lpNewFileName, sizeof(char) * (nReturn + 1));
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}
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}
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CSTRING_CATCH
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{
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DPFN(
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eDbgLevelInfo,
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"[WinG32SysToSys32] Error parsing new string");
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}
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}
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return nReturn;
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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APIHOOK_ENTRY(KERNEL32.DLL, GetModuleFileNameA)
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HOOK_END
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IMPLEMENT_SHIM_END
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