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170 lines
3.5 KiB
170 lines
3.5 KiB
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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Win98VersionLie.cpp
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Abstract:
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This DLL hooks GetVersion and GetVersionEx so that they return Windows 98
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version credentials. Applications often check to ensure that they are
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running on a Win9x system, even though they will run OK on an NT based
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system.
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Notes:
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This is a general purpose shim.
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History:
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11/08/2000 v-hyders Created
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--*/
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#include "precomp.h"
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#include "LegalStr.h"
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IMPLEMENT_SHIM_BEGIN(Win98VersionLie)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(GetVersionExA)
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APIHOOK_ENUM_ENTRY(GetVersionExW)
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APIHOOK_ENUM_ENTRY(GetVersion)
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APIHOOK_ENUM_END
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BOOL g_bCheckSafeDisc = FALSE;
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/*++
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This stub function fixes up the OSVERSIONINFO structure that is
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returned to the caller with Windows 98 credentials.
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--*/
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BOOL
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APIHOOK(GetVersionExA)(
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OUT LPOSVERSIONINFOA lpVersionInformation
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)
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{
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if (g_bCheckSafeDisc && bIsSafeDisc2()) {
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return ORIGINAL_API(GetVersionExA)(lpVersionInformation);
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} else {
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BOOL bReturn = FALSE;
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if (ORIGINAL_API(GetVersionExA)(lpVersionInformation)) {
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LOGN(eDbgLevelInfo, "[GetVersionExA] called. return Win98");
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//
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// Fixup the structure with the Win98 data.
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//
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lpVersionInformation->dwMajorVersion = 4;
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lpVersionInformation->dwMinorVersion = 10;
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lpVersionInformation->dwBuildNumber = 0x040A08AE;
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lpVersionInformation->dwPlatformId = 1;
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*lpVersionInformation->szCSDVersion = '\0';
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bReturn = TRUE;
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}
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return bReturn;
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}
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}
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/*++
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This stub function fixes up the OSVERSIONINFO structure that is
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returned to the caller with Windows 98 credentials. This is the
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wide-character version of GetVersionExW.
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--*/
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BOOL
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APIHOOK(GetVersionExW)(
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OUT LPOSVERSIONINFOW lpVersionInformation
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)
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{
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if (g_bCheckSafeDisc && bIsSafeDisc2()) {
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return ORIGINAL_API(GetVersionExW)(lpVersionInformation);
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} else {
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BOOL bReturn = FALSE;
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if (ORIGINAL_API(GetVersionExW)(lpVersionInformation)) {
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LOGN(eDbgLevelInfo, "[GetVersionExW] called. return Win98");
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//
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// Fixup the structure with the Win98 data.
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//
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lpVersionInformation->dwMajorVersion = 4;
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lpVersionInformation->dwMinorVersion = 10;
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lpVersionInformation->dwBuildNumber = 0x040A08AE;
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lpVersionInformation->dwPlatformId = 1;
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*lpVersionInformation->szCSDVersion = '\0';
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bReturn = TRUE;
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}
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return bReturn;
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}
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}
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/*++
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This stub function returns Windows 98 credentials.
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--*/
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DWORD
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APIHOOK(GetVersion)(
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void
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)
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{
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if (g_bCheckSafeDisc && bIsSafeDisc2()) {
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return ORIGINAL_API(GetVersion)();
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} else {
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LOGN(eDbgLevelInfo, "[GetVersion] Return Win98");
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return (DWORD) 0xC0000A04;
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}
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}
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/*++
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Register hooked functions
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--*/
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BOOL
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NOTIFY_FUNCTION(
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DWORD fdwReason
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)
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{
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if (fdwReason == DLL_PROCESS_ATTACH)
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{
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g_bCheckSafeDisc = COMMAND_LINE && (_stricmp(COMMAND_LINE, "Detect_SafeDisc") == 0);
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if (g_bCheckSafeDisc && bIsSafeDisc1())
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{
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LOGN(eDbgLevelWarning, "SafeDisc 1.x detected: ignoring shim");
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return FALSE;
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}
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}
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return TRUE;
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}
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HOOK_BEGIN
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CALL_NOTIFY_FUNCTION
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APIHOOK_ENTRY(KERNEL32.DLL, GetVersionExA)
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APIHOOK_ENTRY(KERNEL32.DLL, GetVersionExW)
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APIHOOK_ENTRY(KERNEL32.DLL, GetVersion)
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HOOK_END
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IMPLEMENT_SHIM_END
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