171 lines
3.7 KiB
C++
171 lines
3.7 KiB
C++
/*++
|
|
|
|
Copyright (c) 2000 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
Win95VersionLie.cpp
|
|
|
|
Abstract:
|
|
|
|
This DLL hooks GetVersion and GetVersionEx so that they return Windows 95
|
|
version credentials. Applications often check to ensure that they are
|
|
running on a Win9x system, even though they will run OK on an NT based
|
|
system.
|
|
|
|
Notes:
|
|
|
|
This is a general purpose shim.
|
|
|
|
History:
|
|
|
|
11/10/1999 v-johnwh Created
|
|
|
|
--*/
|
|
|
|
#include "precomp.h"
|
|
|
|
IMPLEMENT_SHIM_BEGIN(Win95VersionLie)
|
|
#include "ShimHookMacro.h"
|
|
|
|
APIHOOK_ENUM_BEGIN
|
|
APIHOOK_ENUM_ENTRY(GetVersion)
|
|
APIHOOK_ENUM_ENTRY(GetVersionExA)
|
|
APIHOOK_ENUM_ENTRY(GetVersionExW)
|
|
APIHOOK_ENUM_END
|
|
|
|
// Used for layer to turn on SafeDisc checking
|
|
BOOL g_bCheckSafeDisc = FALSE;
|
|
|
|
/*++
|
|
|
|
This stub function fixes up the OSVERSIONINFO structure that is
|
|
returned to the caller with Windows 95 credentials.
|
|
|
|
--*/
|
|
|
|
BOOL
|
|
APIHOOK(GetVersionExA)(
|
|
OUT LPOSVERSIONINFOA lpVersionInformation
|
|
)
|
|
{
|
|
if (g_bCheckSafeDisc && bIsSafeDisc2()) {
|
|
return ORIGINAL_API(GetVersionExA)(lpVersionInformation);
|
|
} else {
|
|
BOOL bReturn = FALSE;
|
|
|
|
if (ORIGINAL_API(GetVersionExA)(lpVersionInformation)) {
|
|
|
|
LOGN(eDbgLevelInfo, "[GetVersionExA] Return Win95");
|
|
|
|
//
|
|
// Fixup the structure with the Win95 data.
|
|
//
|
|
lpVersionInformation->dwMajorVersion = 4;
|
|
lpVersionInformation->dwMinorVersion = 0;
|
|
lpVersionInformation->dwBuildNumber = 950;
|
|
lpVersionInformation->dwPlatformId = 1;
|
|
*lpVersionInformation->szCSDVersion = '\0';
|
|
|
|
bReturn = TRUE;
|
|
}
|
|
|
|
return bReturn;
|
|
}
|
|
}
|
|
|
|
/*++
|
|
|
|
This stub function fixes up the OSVERSIONINFO structure that is
|
|
returned to the caller with Windows 95 credentials.
|
|
|
|
--*/
|
|
|
|
BOOL
|
|
APIHOOK(GetVersionExW)(
|
|
OUT LPOSVERSIONINFOW lpVersionInformation
|
|
)
|
|
{
|
|
if (g_bCheckSafeDisc && bIsSafeDisc2()) {
|
|
return ORIGINAL_API(GetVersionExW)(lpVersionInformation);
|
|
} else {
|
|
BOOL bReturn = FALSE;
|
|
|
|
if (ORIGINAL_API(GetVersionExW)(lpVersionInformation)) {
|
|
|
|
LOGN(eDbgLevelInfo, "[GetVersionExW] Return Win95");
|
|
|
|
//
|
|
// Fixup the structure with the Win95 data.
|
|
//
|
|
lpVersionInformation->dwMajorVersion = 4;
|
|
lpVersionInformation->dwMinorVersion = 0;
|
|
lpVersionInformation->dwBuildNumber = 950;
|
|
lpVersionInformation->dwPlatformId = 1;
|
|
*lpVersionInformation->szCSDVersion = L'\0';
|
|
|
|
bReturn = TRUE;
|
|
}
|
|
|
|
return bReturn;
|
|
}
|
|
}
|
|
|
|
/*++
|
|
|
|
This stub function returns Windows 95 credentials.
|
|
|
|
--*/
|
|
|
|
DWORD
|
|
APIHOOK(GetVersion)(
|
|
void
|
|
)
|
|
{
|
|
if (g_bCheckSafeDisc && bIsSafeDisc2()) {
|
|
return ORIGINAL_API(GetVersion)();
|
|
} else {
|
|
LOGN(eDbgLevelInfo, "[GetVersion] Return Win95");
|
|
return (DWORD)0xC3B60004;
|
|
}
|
|
}
|
|
|
|
/*++
|
|
|
|
Register hooked functions
|
|
|
|
--*/
|
|
|
|
BOOL
|
|
NOTIFY_FUNCTION(
|
|
DWORD fdwReason
|
|
)
|
|
{
|
|
if (fdwReason == DLL_PROCESS_ATTACH)
|
|
{
|
|
g_bCheckSafeDisc = COMMAND_LINE && (_stricmp(COMMAND_LINE, "Detect_SafeDisc") == 0);
|
|
|
|
if (g_bCheckSafeDisc && bIsSafeDisc1())
|
|
{
|
|
LOGN(eDbgLevelWarning, "SafeDisc 1.x detected: ignoring shim");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
HOOK_BEGIN
|
|
|
|
CALL_NOTIFY_FUNCTION
|
|
|
|
APIHOOK_ENTRY(KERNEL32.DLL, GetVersion)
|
|
APIHOOK_ENTRY(KERNEL32.DLL, GetVersionExA)
|
|
APIHOOK_ENTRY(KERNEL32.DLL, GetVersionExW)
|
|
|
|
HOOK_END
|
|
|
|
|
|
IMPLEMENT_SHIM_END
|
|
|