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/* $Id: RTSystemQueryDmiString-win.cpp $ */
/** @file
* IPRT - RTSystemQueryDmiString, windows ring-3.
*/
/*
* Copyright (C) 2010-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define _WIN32_DCOM
#include <iprt/win/windows.h>
#include <WbemCli.h>
#include <iprt/system.h>
#include "internal/iprt.h"
#include <iprt/errcore.h>
#include <iprt/assert.h>
#include <iprt/string.h>
#include <iprt/utf16.h>
/**
* Initialize COM.
*
* @returns COM status code.
*/
static HRESULT rtSystemDmiWinInitialize(void)
{
HRESULT hrc = CoInitializeEx(0, COINIT_MULTITHREADED);
if (SUCCEEDED(hrc))
{
hrc = CoInitializeSecurity(NULL,
-1, /* COM authentication. */
NULL, /* Which authentication services. */
NULL, /* Reserved. */
RPC_C_AUTHN_LEVEL_DEFAULT, /* Default authentication. */
RPC_C_IMP_LEVEL_IMPERSONATE, /* Default impersonation. */
NULL, /* Authentication info. */
EOAC_NONE, /* Additional capabilities. */
NULL); /* Reserved. */
if (hrc == RPC_E_TOO_LATE)
hrc = S_OK;
else if (FAILED(hrc))
CoUninitialize();
}
return hrc;
}
/**
* Undo what rtSystemDmiWinInitialize did.
*/
static void rtSystemDmiWinTerminate(void)
{
CoUninitialize();
}
/**
* Convert a UTF-8 string to a BSTR.
*
* @returns BSTR pointer.
* @param psz The UTF-8 string.
*/
static BSTR rtSystemWinBstrFromUtf8(const char *psz)
{
PRTUTF16 pwsz = NULL;
int rc = RTStrToUtf16(psz, &pwsz);
if (RT_FAILURE(rc))
return NULL;
BSTR pBStr = SysAllocString((const OLECHAR *)pwsz);
RTUtf16Free(pwsz);
return pBStr;
}
/**
* Connect to the DMI server.
*
* @returns COM status code.
* @param pLocator The locator.
* @param pszServer The server name.
* @param ppServices Where to return the services interface.
*/
static HRESULT rtSystemDmiWinConnectToServer(IWbemLocator *pLocator, const char *pszServer, IWbemServices **ppServices)
{
AssertPtr(pLocator);
AssertPtrNull(pszServer);
AssertPtr(ppServices);
BSTR pBStrServer = rtSystemWinBstrFromUtf8(pszServer);
if (!pBStrServer)
return E_OUTOFMEMORY;
HRESULT hrc = pLocator->ConnectServer(pBStrServer,
NULL,
NULL,
0,
NULL,
0,
0,
ppServices);
if (SUCCEEDED(hrc))
{
hrc = CoSetProxyBlanket(*ppServices,
RPC_C_AUTHN_WINNT,
RPC_C_AUTHZ_NONE,
NULL,
RPC_C_AUTHN_LEVEL_CALL,
RPC_C_IMP_LEVEL_IMPERSONATE,
NULL,
EOAC_NONE);
if (FAILED(hrc))
(*ppServices)->Release();
}
SysFreeString(pBStrServer);
return hrc;
}
RTDECL(int) RTSystemQueryDmiString(RTSYSDMISTR enmString, char *pszBuf, size_t cbBuf)
{
AssertPtrReturn(pszBuf, VERR_INVALID_POINTER);
AssertReturn(cbBuf > 0, VERR_INVALID_PARAMETER);
*pszBuf = '\0';
AssertReturn(enmString > RTSYSDMISTR_INVALID && enmString < RTSYSDMISTR_END, VERR_INVALID_PARAMETER);
/*
* Figure the property name before we start.
*/
const char *pszPropName;
switch (enmString)
{
case RTSYSDMISTR_PRODUCT_NAME: pszPropName = "Name"; break;
case RTSYSDMISTR_PRODUCT_VERSION: pszPropName = "Version"; break;
case RTSYSDMISTR_PRODUCT_UUID: pszPropName = "UUID"; break;
case RTSYSDMISTR_PRODUCT_SERIAL: pszPropName = "IdentifyingNumber"; break;
case RTSYSDMISTR_MANUFACTURER: pszPropName = "Vendor"; break;
default:
return VERR_NOT_SUPPORTED;
}
/*
* Before we do anything with COM, we have to initialize it.
*/
bool fUninit = true;
HRESULT hrc = rtSystemDmiWinInitialize();
if (hrc == RPC_E_CHANGED_MODE)
fUninit = false; /* don't fail if already initialized */
else if (FAILED(hrc))
return VERR_NOT_SUPPORTED;
int rc = VERR_NOT_SUPPORTED;
BSTR pBstrPropName = rtSystemWinBstrFromUtf8(pszPropName);
if (pBstrPropName)
{
/*
* Instantiate the IWbemLocator, whatever that is and connect to the
* DMI serve.
*/
IWbemLocator *pLoc;
hrc = CoCreateInstance(CLSID_WbemLocator,
0,
CLSCTX_INPROC_SERVER,
IID_IWbemLocator,
(LPVOID *)&pLoc);
if (SUCCEEDED(hrc))
{
IWbemServices *pServices;
hrc = rtSystemDmiWinConnectToServer(pLoc, "ROOT\\CIMV2", &pServices);
if (SUCCEEDED(hrc))
{
/*
* Enumerate whatever it is we're looking at and try get
* the desired property.
*/
BSTR pBstrFilter = rtSystemWinBstrFromUtf8("Win32_ComputerSystemProduct");
if (pBstrFilter)
{
IEnumWbemClassObject *pEnum;
hrc = pServices->CreateInstanceEnum(pBstrFilter, 0, NULL, &pEnum);
if (SUCCEEDED(hrc))
{
do
{
IWbemClassObject *pObj;
ULONG cObjRet;
hrc = pEnum->Next(WBEM_INFINITE, 1, &pObj, &cObjRet);
if ( SUCCEEDED(hrc)
&& cObjRet >= 1)
{
VARIANT Var;
VariantInit(&Var);
hrc = pObj->Get(pBstrPropName, 0, &Var, 0, 0);
if ( SUCCEEDED(hrc)
&& V_VT(&Var) == VT_BSTR)
{
/*
* Convert the BSTR to UTF-8 and copy it
* into the return buffer.
*/
char *pszValue;
rc = RTUtf16ToUtf8(Var.bstrVal, &pszValue);
if (RT_SUCCESS(rc))
{
rc = RTStrCopy(pszBuf, cbBuf, pszValue);
RTStrFree(pszValue);
hrc = WBEM_S_FALSE;
}
}
VariantClear(&Var);
pObj->Release();
}
} while (hrc != WBEM_S_FALSE);
pEnum->Release();
}
SysFreeString(pBstrFilter);
}
else
hrc = E_OUTOFMEMORY;
pServices->Release();
}
pLoc->Release();
}
SysFreeString(pBstrPropName);
}
else
hrc = E_OUTOFMEMORY;
if (fUninit)
rtSystemDmiWinTerminate();
if (FAILED(hrc) && rc == VERR_NOT_SUPPORTED)
rc = VERR_NOT_SUPPORTED;
return rc;
}
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