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wksid.c
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wksid.c
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/**
* @file dll/wksid.c
*
* @copyright 2015-2020 Bill Zissimopoulos
*/
/*
* This file is part of WinFsp.
*
* You can redistribute it and/or modify it under the terms of the GNU
* General Public License version 3 as published by the Free Software
* Foundation.
*
* Licensees holding a valid commercial license may use this software
* in accordance with the commercial license agreement provided in
* conjunction with the software. The terms and conditions of any such
* commercial license agreement shall govern, supersede, and render
* ineffective any application of the GPLv3 license to this software,
* notwithstanding of any reference thereto in the software or
* associated repository.
*/
#include <dll/library.h>
static INIT_ONCE FspWksidInitOnce = INIT_ONCE_STATIC_INIT;
static PSID FspWksidWorld;
static PSID FspWksidAuthenticatedUser;
static PSID FspWksidLocalSystem;
static PSID FspWksidService;
static BOOL WINAPI FspWksidInitialize(
PINIT_ONCE InitOnce, PVOID Parameter, PVOID *Context)
{
FspWksidWorld = FspWksidNew(WinWorldSid, 0);
FspWksidAuthenticatedUser = FspWksidNew(WinAuthenticatedUserSid, 0);
FspWksidLocalSystem = FspWksidNew(WinLocalSystemSid, 0);
FspWksidService = FspWksidNew(WinServiceSid, 0);
//DEBUGLOGSID("FspWksidWorld=%s", FspWksidWorld);
//DEBUGLOGSID("FspWksidAuthenticatedUser=%s", FspWksidAuthenticatedUser);
//DEBUGLOGSID("FspWksidLocalSystem=%s", FspWksidLocalSystem);
//DEBUGLOGSID("FspWksidService=%s", FspWksidService);
return TRUE;
}
VOID FspWksidFinalize(BOOLEAN Dynamic)
{
/*
* This function is called during DLL_PROCESS_DETACH. We must therefore keep
* finalization tasks to a minimum.
*
* We must deregister our event source (if any). We only do so if the library
* is being explicitly unloaded (rather than the process exiting).
*/
if (Dynamic)
{
MemFree(FspWksidWorld); FspWksidWorld = 0;
MemFree(FspWksidAuthenticatedUser); FspWksidAuthenticatedUser = 0;
MemFree(FspWksidLocalSystem); FspWksidLocalSystem = 0;
MemFree(FspWksidService); FspWksidService = 0;
}
}
PSID FspWksidNew(WELL_KNOWN_SID_TYPE WellKnownSidType, PNTSTATUS PResult)
{
NTSTATUS Result;
PSID Sid;
DWORD Size;
Size = SECURITY_MAX_SID_SIZE;
Sid = MemAlloc(Size);
if (0 == Sid)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
if (!CreateWellKnownSid(WellKnownSidType, 0, Sid, &Size))
{
Result = FspNtStatusFromWin32(GetLastError());
MemFree(Sid); Sid = 0;
goto exit;
}
Result = STATUS_SUCCESS;
exit:
if (0 != PResult)
*PResult = Result;
return Sid;
}
PSID FspWksidGet(WELL_KNOWN_SID_TYPE WellKnownSidType)
{
InitOnceExecuteOnce(&FspWksidInitOnce, FspWksidInitialize, 0, 0);
switch (WellKnownSidType)
{
case WinWorldSid:
return FspWksidWorld;
case WinAuthenticatedUserSid:
return FspWksidAuthenticatedUser;
case WinLocalSystemSid:
return FspWksidLocalSystem;
case WinServiceSid:
return FspWksidService;
default:
return 0;
}
}