[mirror_qemu.git] / qga / vss-win32 / install.cpp

/*
 * QEMU Guest Agent win32 VSS Provider installer
 *
 * Copyright Hitachi Data Systems Corp. 2013
 *
 * Authors:
 *  Tomoki Sekiyama   <tomoki.sekiyama@hds.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */

#include "qemu/osdep.h"

#include "vss-common.h"
#ifdef HAVE_VSS_SDK
#include <vscoordint.h>
#else
#include <vsadmin.h>
#endif
#include "install.h"
#include <wbemidl.h>
#include <comdef.h>
#include <comutil.h>
#include <sddl.h>
#include <winsvc.h>

#define BUFFER_SIZE 1024

extern HINSTANCE g_hinstDll;

const GUID CLSID_COMAdminCatalog = { 0xF618C514, 0xDFB8, 0x11d1,
    {0xA2, 0xCF, 0x00, 0x80, 0x5F, 0xC7, 0x92, 0x35} };
const GUID IID_ICOMAdminCatalog2 = { 0x790C6E0B, 0x9194, 0x4cc9,
    {0x94, 0x26, 0xA4, 0x8A, 0x63, 0x18, 0x56, 0x96} };
const GUID CLSID_WbemLocator = { 0x4590f811, 0x1d3a, 0x11d0,
    {0x89, 0x1f, 0x00, 0xaa, 0x00, 0x4b, 0x2e, 0x24} };
const GUID IID_IWbemLocator = { 0xdc12a687, 0x737f, 0x11cf,
    {0x88, 0x4d, 0x00, 0xaa, 0x00, 0x4b, 0x2e, 0x24} };

void errmsg(DWORD err, const char *text)
{
    /*
     * `text' contains function call statement when errmsg is called via chk().
     * To make error message more readable, we cut off the text after '('.
     * If text doesn't contains '(', negative precision is given, which is
     * treated as though it were missing.
     */
    char *msg = NULL, *nul = strchr(text, '(');
    int len = nul ? nul - text : -1;

    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                  FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
                  NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                  (char *)&msg, 0, NULL);
    fprintf(stderr, "%.*s. (Error: %lx) %s\n", len, text, err, msg);
    LocalFree(msg);
}

static void errmsg_dialog(DWORD err, const char *text, const char *opt = "")
{
    char *msg, buf[512];

    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                  FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
                  NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                  (char *)&msg, 0, NULL);
    snprintf(buf, sizeof(buf), "%s%s. (Error: %lx) %s", text, opt, err, msg);
    MessageBox(NULL, buf, "Error from " QGA_PROVIDER_NAME, MB_OK|MB_ICONERROR);
    LocalFree(msg);
}

#define _chk(hr, status, msg, err_label)        \
    do {                                        \
        hr = (status);                          \
        if (FAILED(hr)) {                       \
            errmsg(hr, msg);                    \
            goto err_label;                     \
        }                                       \
    } while (0)

#define chk(status) _chk(hr, status, "Failed to " #status, out)

#if !defined(__MINGW64_VERSION_MAJOR) || !defined(__MINGW64_VERSION_MINOR) || \
    __MINGW64_VERSION_MAJOR * 100 + __MINGW64_VERSION_MINOR < 301
void __stdcall _com_issue_error(HRESULT hr)
{
    errmsg(hr, "Unexpected error in COM");
}
#endif

template<class T>
HRESULT put_Value(ICatalogObject *pObj, LPCWSTR name, T val)
{
    return pObj->put_Value(_bstr_t(name), _variant_t(val));
}

/* Lookup Administrators group name from winmgmt */
static HRESULT GetAdminName(_bstr_t *name)
{
    HRESULT hr;
    COMPointer<IWbemLocator> pLoc;
    COMPointer<IWbemServices> pSvc;
    COMPointer<IEnumWbemClassObject> pEnum;
    COMPointer<IWbemClassObject> pWobj;
    ULONG returned;
    _variant_t var;

    chk(CoCreateInstance(CLSID_WbemLocator, NULL, CLSCTX_INPROC_SERVER,
                         IID_IWbemLocator, (LPVOID *)pLoc.replace()));
    chk(pLoc->ConnectServer(_bstr_t(L"ROOT\\CIMV2"), NULL, NULL, NULL,
                            0, 0, 0, pSvc.replace()));
    chk(CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE,
                          NULL, RPC_C_AUTHN_LEVEL_CALL,
                          RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE));
    chk(pSvc->ExecQuery(_bstr_t(L"WQL"),
                        _bstr_t(L"select * from Win32_Account where "
                                "SID='S-1-5-32-544' and localAccount=TRUE"),
                        WBEM_FLAG_RETURN_IMMEDIATELY | WBEM_FLAG_FORWARD_ONLY,
                        NULL, pEnum.replace()));
    if (!pEnum) {
        hr = E_FAIL;
        errmsg(hr, "Failed to query for Administrators");
        goto out;
    }
    chk(pEnum->Next(WBEM_INFINITE, 1, pWobj.replace(), &returned));
    if (returned == 0) {
        hr = E_FAIL;
        errmsg(hr, "No Administrators found");
        goto out;
    }

    chk(pWobj->Get(_bstr_t(L"Name"), 0, &var, 0, 0));
    try {
        *name = var;
    } catch(...) {
        hr = E_FAIL;
        errmsg(hr, "Failed to get name of Administrators");
        goto out;
    }

out:
    return hr;
}

/* Acquire group or user name by SID */
static HRESULT getNameByStringSID(
    const wchar_t *sid, LPWSTR buffer, LPDWORD bufferLen)
{
    HRESULT hr = S_OK;
    PSID psid = NULL;
    SID_NAME_USE groupType;
    DWORD domainNameLen = BUFFER_SIZE;
    wchar_t domainName[BUFFER_SIZE];

    if (!ConvertStringSidToSidW(sid, &psid)) {
        hr = HRESULT_FROM_WIN32(GetLastError());
        goto out;
    }
    if (!LookupAccountSidW(NULL, psid, buffer, bufferLen,
                           domainName, &domainNameLen, &groupType)) {
        hr = HRESULT_FROM_WIN32(GetLastError());
        /* Fall through and free psid */
    }

    LocalFree(psid);

out:
    return hr;
}

/* Find and iterate QGA VSS provider in COM+ Application Catalog */
static HRESULT QGAProviderFind(
    HRESULT (*found)(ICatalogCollection *, int, void *), void *arg)
{
    HRESULT hr;
    COMInitializer initializer;
    COMPointer<IUnknown> pUnknown;
    COMPointer<ICOMAdminCatalog2> pCatalog;
    COMPointer<ICatalogCollection> pColl;
    COMPointer<ICatalogObject> pObj;
    _variant_t var;
    long i, n;

    chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER,
                         IID_IUnknown, (void **)pUnknown.replace()));
    chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2,
                                 (void **)pCatalog.replace()));
    chk(pCatalog->GetCollection(_bstr_t(L"Applications"),
                                (IDispatch **)pColl.replace()));
    chk(pColl->Populate());

    chk(pColl->get_Count(&n));
    for (i = n - 1; i >= 0; i--) {
        chk(pColl->get_Item(i, (IDispatch **)pObj.replace()));
        chk(pObj->get_Value(_bstr_t(L"Name"), &var));
        if (var == _variant_t(QGA_PROVIDER_LNAME)) {
            if (FAILED(found(pColl, i, arg))) {
                goto out;
            }
        }
    }
    chk(pColl->SaveChanges(&n));

out:
    return hr;
}

/* Count QGA VSS provider in COM+ Application Catalog */
static HRESULT QGAProviderCount(ICatalogCollection *coll, int i, void *arg)
{
    (*(int *)arg)++;
    return S_OK;
}

/* Remove QGA VSS provider from COM+ Application Catalog Collection */
static HRESULT QGAProviderRemove(ICatalogCollection *coll, int i, void *arg)
{
    HRESULT hr;

    fprintf(stderr, "Removing COM+ Application: %s\n", QGA_PROVIDER_NAME);
    chk(coll->Remove(i));
out:
    return hr;
}

/* Unregister this module from COM+ Applications Catalog */
STDAPI COMUnregister(void)
{
    HRESULT hr;

    DllUnregisterServer();
    chk(QGAProviderFind(QGAProviderRemove, NULL));
out:
    return hr;
}

/* Register this module to COM+ Applications Catalog */
STDAPI COMRegister(void)
{
    HRESULT hr;
    COMInitializer initializer;
    COMPointer<IUnknown> pUnknown;
    COMPointer<ICOMAdminCatalog2> pCatalog;
    COMPointer<ICatalogCollection> pApps, pRoles, pUsersInRole;
    COMPointer<ICatalogObject> pObj;
    long n;
    _bstr_t name;
    _variant_t key;
    CHAR dllPath[MAX_PATH], tlbPath[MAX_PATH];
    bool unregisterOnFailure = false;
    int count = 0;
    DWORD bufferLen = BUFFER_SIZE;
    wchar_t buffer[BUFFER_SIZE];
    const wchar_t *administratorsGroupSID = L"S-1-5-32-544";
    const wchar_t *systemUserSID = L"S-1-5-18";

    if (!g_hinstDll) {
        errmsg(E_FAIL, "Failed to initialize DLL");
        return E_FAIL;
    }

    chk(QGAProviderFind(QGAProviderCount, (void *)&count));
    if (count) {
        errmsg(E_ABORT, "QGA VSS Provider is already installed");
        return E_ABORT;
    }

    chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER,
                         IID_IUnknown, (void **)pUnknown.replace()));
    chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2,
                                 (void **)pCatalog.replace()));

    /* Install COM+ Component */

    chk(pCatalog->GetCollection(_bstr_t(L"Applications"),
                                (IDispatch **)pApps.replace()));
    chk(pApps->Populate());
    chk(pApps->Add((IDispatch **)&pObj));
    chk(put_Value(pObj, L"Name",        QGA_PROVIDER_LNAME));
    chk(put_Value(pObj, L"Description", QGA_PROVIDER_LNAME));
    chk(put_Value(pObj, L"ApplicationAccessChecksEnabled", true));
    chk(put_Value(pObj, L"Authentication",                 short(6)));
    chk(put_Value(pObj, L"AuthenticationCapability",       short(2)));
    chk(put_Value(pObj, L"ImpersonationLevel",             short(2)));
    chk(pApps->SaveChanges(&n));

    /* The app should be deleted if something fails after SaveChanges */
    unregisterOnFailure = true;

    chk(pObj->get_Key(&key));

    if (!GetModuleFileName(g_hinstDll, dllPath, sizeof(dllPath))) {
        hr = HRESULT_FROM_WIN32(GetLastError());
        errmsg(hr, "GetModuleFileName failed");
        goto out;
    }
    n = strlen(dllPath);
    if (n < 3) {
        hr = E_FAIL;
        errmsg(hr, "Failed to lookup dll");
        goto out;
    }
    strcpy(tlbPath, dllPath);
    strcpy(tlbPath+n-3, "tlb");
    fprintf(stderr, "Registering " QGA_PROVIDER_NAME ":\n");
    fprintf(stderr, "  %s\n", dllPath);
    fprintf(stderr, "  %s\n", tlbPath);
    if (!PathFileExists(tlbPath)) {
        hr = HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
        errmsg(hr, "Failed to lookup tlb");
        goto out;
    }

    chk(pCatalog->CreateServiceForApplication(
            _bstr_t(QGA_PROVIDER_LNAME), _bstr_t(QGA_PROVIDER_LNAME),
            _bstr_t(L"SERVICE_DEMAND_START"), _bstr_t(L"SERVICE_ERROR_NORMAL"),
            _bstr_t(L""), _bstr_t(L".\\localsystem"), _bstr_t(L""), FALSE));
    chk(pCatalog->InstallComponent(_bstr_t(QGA_PROVIDER_LNAME),
                                   _bstr_t(dllPath), _bstr_t(tlbPath),
                                   _bstr_t("")));

    /* Setup roles of the applicaion */

    chk(getNameByStringSID(administratorsGroupSID, buffer, &bufferLen));
    chk(pApps->GetCollection(_bstr_t(L"Roles"), key,
                             (IDispatch **)pRoles.replace()));
    chk(pRoles->Populate());
    chk(pRoles->Add((IDispatch **)pObj.replace()));
    chk(put_Value(pObj, L"Name", buffer));
    chk(put_Value(pObj, L"Description", L"Administrators group"));
    chk(pRoles->SaveChanges(&n));
    chk(pObj->get_Key(&key));

    /* Setup users in the role */

    chk(pRoles->GetCollection(_bstr_t(L"UsersInRole"), key,
                              (IDispatch **)pUsersInRole.replace()));
    chk(pUsersInRole->Populate());

    chk(pUsersInRole->Add((IDispatch **)pObj.replace()));
    chk(GetAdminName(&name));
    chk(put_Value(pObj, L"User", _bstr_t(".\\") + name));

    bufferLen = BUFFER_SIZE;
    chk(getNameByStringSID(systemUserSID, buffer, &bufferLen));
    chk(pUsersInRole->Add((IDispatch **)pObj.replace()));
    chk(put_Value(pObj, L"User", buffer));
    chk(pUsersInRole->SaveChanges(&n));

out:
    if (unregisterOnFailure && FAILED(hr)) {
        COMUnregister();
    }

    return hr;
}


static BOOL CreateRegistryKey(LPCTSTR key, LPCTSTR value, LPCTSTR data)
{
    HKEY  hKey;
    LONG  ret;
    DWORD size;

    ret = RegCreateKeyEx(HKEY_CLASSES_ROOT, key, 0, NULL,
        REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL);
    if (ret != ERROR_SUCCESS) {
        goto out;
    }

    if (data != NULL) {
        size = strlen(data) + 1;
    } else {
        size = 0;
    }

    ret = RegSetValueEx(hKey, value, 0, REG_SZ, (LPBYTE)data, size);
    RegCloseKey(hKey);

out:
    if (ret != ERROR_SUCCESS) {
        /* As we cannot printf within DllRegisterServer(), show a dialog. */
        errmsg_dialog(ret, "Cannot add registry", key);
        return FALSE;
    }
    return TRUE;
}

/* Register this dll as a VSS provider */
STDAPI DllRegisterServer(void)
{
    COMInitializer initializer;
    COMPointer<IVssAdmin> pVssAdmin;
    HRESULT hr = E_FAIL;
    char dllPath[MAX_PATH];
    char key[256];

    if (!g_hinstDll) {
        errmsg_dialog(hr, "Module instance is not available");
        goto out;
    }

    /* Add this module to registery */

    sprintf(key, "CLSID\\%s", g_szClsid);
    if (!CreateRegistryKey(key, NULL, g_szClsid)) {
        goto out;
    }

    if (!GetModuleFileName(g_hinstDll, dllPath, sizeof(dllPath))) {
        errmsg_dialog(GetLastError(), "GetModuleFileName failed");
        goto out;
    }

    sprintf(key, "CLSID\\%s\\InprocServer32", g_szClsid);
    if (!CreateRegistryKey(key, NULL, dllPath)) {
        goto out;
    }

    if (!CreateRegistryKey(key, "ThreadingModel", "Apartment")) {
        goto out;
    }

    sprintf(key, "CLSID\\%s\\ProgID", g_szClsid);
    if (!CreateRegistryKey(key, NULL, g_szProgid)) {
        goto out;
    }

    if (!CreateRegistryKey(g_szProgid, NULL, QGA_PROVIDER_NAME)) {
        goto out;
    }

    sprintf(key, "%s\\CLSID", g_szProgid);
    if (!CreateRegistryKey(key, NULL, g_szClsid)) {
        goto out;
    }

    hr = CoCreateInstance(CLSID_VSSCoordinator, NULL, CLSCTX_ALL,
                          IID_IVssAdmin, (void **)pVssAdmin.replace());
    if (FAILED(hr)) {
        errmsg_dialog(hr, "CoCreateInstance(VSSCoordinator) failed");
        goto out;
    }

    hr = pVssAdmin->RegisterProvider(g_gProviderId, CLSID_QGAVSSProvider,
                                     const_cast<WCHAR*>(QGA_PROVIDER_LNAME),
                                     VSS_PROV_SOFTWARE,
                                     const_cast<WCHAR*>(QGA_PROVIDER_VERSION),
                                     g_gProviderVersion);
    if (hr == (long int) VSS_E_PROVIDER_ALREADY_REGISTERED) {
        DllUnregisterServer();
        hr = pVssAdmin->RegisterProvider(g_gProviderId, CLSID_QGAVSSProvider,
                                         const_cast<WCHAR * >
                                         (QGA_PROVIDER_LNAME),
                                         VSS_PROV_SOFTWARE,
                                         const_cast<WCHAR * >
                                         (QGA_PROVIDER_VERSION),
                                         g_gProviderVersion);
    }

    if (FAILED(hr)) {
        errmsg_dialog(hr, "RegisterProvider failed");
    }

out:
    if (FAILED(hr)) {
        DllUnregisterServer();
    }

    return hr;
}

/* Unregister this VSS hardware provider from the system */
STDAPI DllUnregisterServer(void)
{
    TCHAR key[256];
    COMInitializer initializer;
    COMPointer<IVssAdmin> pVssAdmin;

    HRESULT hr = CoCreateInstance(CLSID_VSSCoordinator,
                                  NULL, CLSCTX_ALL, IID_IVssAdmin,
                                  (void **)pVssAdmin.replace());
    if (SUCCEEDED(hr)) {
        hr = pVssAdmin->UnregisterProvider(g_gProviderId);
    } else {
        errmsg(hr, "CoCreateInstance(VSSCoordinator) failed");
    }

    sprintf(key, "CLSID\\%s", g_szClsid);
    SHDeleteKey(HKEY_CLASSES_ROOT, key);
    SHDeleteKey(HKEY_CLASSES_ROOT, g_szProgid);

    return S_OK; /* Uninstall should never fail */
}


/* Support function to convert ASCII string into BSTR (used in _bstr_t) */
namespace _com_util
{
    BSTR WINAPI ConvertStringToBSTR(const char *ascii) {
        int len = strlen(ascii);
        BSTR bstr = SysAllocStringLen(NULL, len);

        if (!bstr) {
            return NULL;
        }

        if (mbstowcs(bstr, ascii, len) == (size_t)-1) {
            fprintf(stderr, "Failed to convert string '%s' into BSTR", ascii);
            bstr[0] = 0;
        }
        return bstr;
    }
}

/* Stop QGA VSS provider service using Winsvc API  */
STDAPI StopService(void)
{
    HRESULT hr;
    SC_HANDLE manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
    SC_HANDLE service = NULL;

    if (!manager) {
        errmsg(E_FAIL, "Failed to open service manager");
        hr = E_FAIL;
        goto out;
    }
    service = OpenService(manager, QGA_PROVIDER_NAME, SC_MANAGER_ALL_ACCESS);

    if (!service) {
        errmsg(E_FAIL, "Failed to open service");
        hr =  E_FAIL;
        goto out;
    }
    if (!(ControlService(service, SERVICE_CONTROL_STOP, NULL))) {
        errmsg(E_FAIL, "Failed to stop service");
        hr = E_FAIL;
    }

out:
    CloseServiceHandle(service);
    CloseServiceHandle(manager);
    return hr;
}
Commit	Line	Data
b39297ae TS	1	/*
	2	* QEMU Guest Agent win32 VSS Provider installer
	3	*
	4	* Copyright Hitachi Data Systems Corp. 2013
	5	*
	6	* Authors:
	7	* Tomoki Sekiyama <tomoki.sekiyama@hds.com>
	8	*
	9	* This work is licensed under the terms of the GNU GPL, version 2 or later.
	10	* See the COPYING file in the top-level directory.
	11	*/
	12
e55eb806	13	#include "qemu/osdep.h"
b39297ae TS	14
b39297ae TS	15	#include "vss-common.h"
872b69e6	16	#ifdef HAVE_VSS_SDK
61fb0bd1	17	#include <vscoordint.h>
872b69e6 MAL	18	#else
	19	#include <vsadmin.h>
	20	#endif
f342cc93	21	#include "install.h"
b39297ae TS	22	#include <wbemidl.h>
	23	#include <comdef.h>
	24	#include <comutil.h>
009f38d9	25	#include <sddl.h>
917ebcb1	26	#include <winsvc.h>
009f38d9 DR	27
009f38d9 DR	28	#define BUFFER_SIZE 1024
b39297ae TS	29
	30	extern HINSTANCE g_hinstDll;
	31
	32	const GUID CLSID_COMAdminCatalog = { 0xF618C514, 0xDFB8, 0x11d1,
	33	{0xA2, 0xCF, 0x00, 0x80, 0x5F, 0xC7, 0x92, 0x35} };
bca4bf10 TS	34	const GUID IID_ICOMAdminCatalog2 = { 0x790C6E0B, 0x9194, 0x4cc9,
bca4bf10 TS	35	{0x94, 0x26, 0xA4, 0x8A, 0x63, 0x18, 0x56, 0x96} };
b39297ae TS	36	const GUID CLSID_WbemLocator = { 0x4590f811, 0x1d3a, 0x11d0,
	37	{0x89, 0x1f, 0x00, 0xaa, 0x00, 0x4b, 0x2e, 0x24} };
	38	const GUID IID_IWbemLocator = { 0xdc12a687, 0x737f, 0x11cf,
	39	{0x88, 0x4d, 0x00, 0xaa, 0x00, 0x4b, 0x2e, 0x24} };
	40
	41	void errmsg(DWORD err, const char *text)
	42	{
	43	/*
	44	* `text' contains function call statement when errmsg is called via chk().
	45	* To make error message more readable, we cut off the text after '('.
	46	* If text doesn't contains '(', negative precision is given, which is
	47	* treated as though it were missing.
	48	*/
	49	char msg = NULL, nul = strchr(text, '(');
	50	int len = nul ? nul - text : -1;
	51
	52	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER \|
	53	FORMAT_MESSAGE_FROM_SYSTEM \| FORMAT_MESSAGE_IGNORE_INSERTS,
	54	NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
	55	(char *)&msg, 0, NULL);
	56	fprintf(stderr, "%.*s. (Error: %lx) %s\n", len, text, err, msg);
	57	LocalFree(msg);
	58	}
	59
	60	static void errmsg_dialog(DWORD err, const char text, const char opt = "")
	61	{
	62	char *msg, buf[512];
	63
	64	FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER \|
	65	FORMAT_MESSAGE_FROM_SYSTEM \| FORMAT_MESSAGE_IGNORE_INSERTS,
	66	NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
	67	(char *)&msg, 0, NULL);
	68	snprintf(buf, sizeof(buf), "%s%s. (Error: %lx) %s", text, opt, err, msg);
	69	MessageBox(NULL, buf, "Error from " QGA_PROVIDER_NAME, MB_OK\|MB_ICONERROR);
	70	LocalFree(msg);
	71	}
	72
	73	#define _chk(hr, status, msg, err_label) \
	74	do { \
	75	hr = (status); \
	76	if (FAILED(hr)) { \
	77	errmsg(hr, msg); \
	78	goto err_label; \
	79	} \
	80	} while (0)
	81
	82	#define chk(status) _chk(hr, status, "Failed to " #status, out)
	83
9854202b TS	84	#if !defined(__MINGW64_VERSION_MAJOR) \|\| !defined(__MINGW64_VERSION_MINOR) \|\| \
9854202b TS	85	__MINGW64_VERSION_MAJOR * 100 + __MINGW64_VERSION_MINOR < 301
b39297ae TS	86	void __stdcall _com_issue_error(HRESULT hr)
	87	{
	88	errmsg(hr, "Unexpected error in COM");
	89	}
9854202b	90	#endif
b39297ae TS	91
	92	template<class T>
	93	HRESULT put_Value(ICatalogObject *pObj, LPCWSTR name, T val)
	94	{
	95	return pObj->put_Value(_bstr_t(name), _variant_t(val));
	96	}
	97
	98	/* Lookup Administrators group name from winmgmt */
	99	static HRESULT GetAdminName(_bstr_t *name)
	100	{
	101	HRESULT hr;
	102	COMPointer<IWbemLocator> pLoc;
	103	COMPointer<IWbemServices> pSvc;
	104	COMPointer<IEnumWbemClassObject> pEnum;
	105	COMPointer<IWbemClassObject> pWobj;
	106	ULONG returned;
	107	_variant_t var;
	108
	109	chk(CoCreateInstance(CLSID_WbemLocator, NULL, CLSCTX_INPROC_SERVER,
	110	IID_IWbemLocator, (LPVOID *)pLoc.replace()));
	111	chk(pLoc->ConnectServer(_bstr_t(L"ROOT\\CIMV2"), NULL, NULL, NULL,
	112	0, 0, 0, pSvc.replace()));
	113	chk(CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE,
	114	NULL, RPC_C_AUTHN_LEVEL_CALL,
	115	RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE));
	116	chk(pSvc->ExecQuery(_bstr_t(L"WQL"),
	117	_bstr_t(L"select * from Win32_Account where "
	118	"SID='S-1-5-32-544' and localAccount=TRUE"),
	119	WBEM_FLAG_RETURN_IMMEDIATELY \| WBEM_FLAG_FORWARD_ONLY,
	120	NULL, pEnum.replace()));
	121	if (!pEnum) {
	122	hr = E_FAIL;
	123	errmsg(hr, "Failed to query for Administrators");
	124	goto out;
	125	}
	126	chk(pEnum->Next(WBEM_INFINITE, 1, pWobj.replace(), &returned));
	127	if (returned == 0) {
	128	hr = E_FAIL;
	129	errmsg(hr, "No Administrators found");
	130	goto out;
	131	}
	132
	133	chk(pWobj->Get(_bstr_t(L"Name"), 0, &var, 0, 0));
	134	try {
	135	*name = var;
	136	} catch(...) {
	137	hr = E_FAIL;
	138	errmsg(hr, "Failed to get name of Administrators");
	139	goto out;
	140	}
	141
	142	out:
	143	return hr;
	144	}
	145
009f38d9 DR	146	/* Acquire group or user name by SID */
	147	static HRESULT getNameByStringSID(
	148	const wchar_t *sid, LPWSTR buffer, LPDWORD bufferLen)
	149	{
	150	HRESULT hr = S_OK;
	151	PSID psid = NULL;
	152	SID_NAME_USE groupType;
	153	DWORD domainNameLen = BUFFER_SIZE;
	154	wchar_t domainName[BUFFER_SIZE];
	155
8cedc805 MR	156	if (!ConvertStringSidToSidW(sid, &psid)) {
	157	hr = HRESULT_FROM_WIN32(GetLastError());
	158	goto out;
	159	}
	160	if (!LookupAccountSidW(NULL, psid, buffer, bufferLen,
	161	domainName, &domainNameLen, &groupType)) {
	162	hr = HRESULT_FROM_WIN32(GetLastError());
	163	/* Fall through and free psid */
	164	}
009f38d9 DR	165
	166	LocalFree(psid);
	167
	168	out:
	169	return hr;
	170	}
	171
b39297ae TS	172	/* Find and iterate QGA VSS provider in COM+ Application Catalog */
	173	static HRESULT QGAProviderFind(
	174	HRESULT (found)(ICatalogCollection , int, void ), void arg)
	175	{
	176	HRESULT hr;
	177	COMInitializer initializer;
	178	COMPointer<IUnknown> pUnknown;
bca4bf10	179	COMPointer<ICOMAdminCatalog2> pCatalog;
b39297ae TS	180	COMPointer<ICatalogCollection> pColl;
	181	COMPointer<ICatalogObject> pObj;
	182	_variant_t var;
	183	long i, n;
	184
	185	chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER,
	186	IID_IUnknown, (void **)pUnknown.replace()));
bca4bf10	187	chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2,
b39297ae TS	188	(void **)pCatalog.replace()));
	189	chk(pCatalog->GetCollection(_bstr_t(L"Applications"),
	190	(IDispatch **)pColl.replace()));
	191	chk(pColl->Populate());
	192
	193	chk(pColl->get_Count(&n));
	194	for (i = n - 1; i >= 0; i--) {
	195	chk(pColl->get_Item(i, (IDispatch **)pObj.replace()));
	196	chk(pObj->get_Value(_bstr_t(L"Name"), &var));
	197	if (var == _variant_t(QGA_PROVIDER_LNAME)) {
	198	if (FAILED(found(pColl, i, arg))) {
	199	goto out;
	200	}
	201	}
	202	}
	203	chk(pColl->SaveChanges(&n));
	204
	205	out:
	206	return hr;
	207	}
	208
	209	/* Count QGA VSS provider in COM+ Application Catalog */
	210	static HRESULT QGAProviderCount(ICatalogCollection coll, int i, void arg)
	211	{
	212	((int )arg)++;
	213	return S_OK;
	214	}
	215
	216	/* Remove QGA VSS provider from COM+ Application Catalog Collection */
	217	static HRESULT QGAProviderRemove(ICatalogCollection coll, int i, void arg)
	218	{
	219	HRESULT hr;
	220
	221	fprintf(stderr, "Removing COM+ Application: %s\n", QGA_PROVIDER_NAME);
	222	chk(coll->Remove(i));
	223	out:
	224	return hr;
	225	}
	226
	227	/* Unregister this module from COM+ Applications Catalog */
	228	STDAPI COMUnregister(void)
	229	{
	230	HRESULT hr;
	231
	232	DllUnregisterServer();
	233	chk(QGAProviderFind(QGAProviderRemove, NULL));
	234	out:
	235	return hr;
	236	}
	237
	238	/* Register this module to COM+ Applications Catalog */
	239	STDAPI COMRegister(void)
	240	{
	241	HRESULT hr;
	242	COMInitializer initializer;
	243	COMPointer<IUnknown> pUnknown;
bca4bf10	244	COMPointer<ICOMAdminCatalog2> pCatalog;
b39297ae TS	245	COMPointer<ICatalogCollection> pApps, pRoles, pUsersInRole;
	246	COMPointer<ICatalogObject> pObj;
	247	long n;
	248	_bstr_t name;
	249	_variant_t key;
	250	CHAR dllPath[MAX_PATH], tlbPath[MAX_PATH];
	251	bool unregisterOnFailure = false;
	252	int count = 0;
009f38d9 DR	253	DWORD bufferLen = BUFFER_SIZE;
	254	wchar_t buffer[BUFFER_SIZE];
	255	const wchar_t *administratorsGroupSID = L"S-1-5-32-544";
	256	const wchar_t *systemUserSID = L"S-1-5-18";
b39297ae TS	257
	258	if (!g_hinstDll) {
	259	errmsg(E_FAIL, "Failed to initialize DLL");
	260	return E_FAIL;
	261	}
	262
	263	chk(QGAProviderFind(QGAProviderCount, (void *)&count));
	264	if (count) {
	265	errmsg(E_ABORT, "QGA VSS Provider is already installed");
	266	return E_ABORT;
	267	}
	268
	269	chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER,
	270	IID_IUnknown, (void **)pUnknown.replace()));
bca4bf10	271	chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2,
b39297ae TS	272	(void **)pCatalog.replace()));
	273
	274	/* Install COM+ Component */
	275
	276	chk(pCatalog->GetCollection(_bstr_t(L"Applications"),
	277	(IDispatch **)pApps.replace()));
	278	chk(pApps->Populate());
	279	chk(pApps->Add((IDispatch **)&pObj));
	280	chk(put_Value(pObj, L"Name", QGA_PROVIDER_LNAME));
	281	chk(put_Value(pObj, L"Description", QGA_PROVIDER_LNAME));
	282	chk(put_Value(pObj, L"ApplicationAccessChecksEnabled", true));
	283	chk(put_Value(pObj, L"Authentication", short(6)));
	284	chk(put_Value(pObj, L"AuthenticationCapability", short(2)));
	285	chk(put_Value(pObj, L"ImpersonationLevel", short(2)));
	286	chk(pApps->SaveChanges(&n));
	287
	288	/* The app should be deleted if something fails after SaveChanges */
	289	unregisterOnFailure = true;
	290
	291	chk(pObj->get_Key(&key));
	292
	293	if (!GetModuleFileName(g_hinstDll, dllPath, sizeof(dllPath))) {
	294	hr = HRESULT_FROM_WIN32(GetLastError());
	295	errmsg(hr, "GetModuleFileName failed");
	296	goto out;
	297	}
	298	n = strlen(dllPath);
	299	if (n < 3) {
	300	hr = E_FAIL;
	301	errmsg(hr, "Failed to lookup dll");
	302	goto out;
	303	}
	304	strcpy(tlbPath, dllPath);
	305	strcpy(tlbPath+n-3, "tlb");
	306	fprintf(stderr, "Registering " QGA_PROVIDER_NAME ":\n");
	307	fprintf(stderr, " %s\n", dllPath);
	308	fprintf(stderr, " %s\n", tlbPath);
	309	if (!PathFileExists(tlbPath)) {
	310	hr = HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
	311	errmsg(hr, "Failed to lookup tlb");
	312	goto out;
	313	}
	314
bca4bf10 TS	315	chk(pCatalog->CreateServiceForApplication(
bca4bf10 TS	316	_bstr_t(QGA_PROVIDER_LNAME), _bstr_t(QGA_PROVIDER_LNAME),
f342cc93	317	_bstr_t(L"SERVICE_DEMAND_START"), _bstr_t(L"SERVICE_ERROR_NORMAL"),
bca4bf10	318	_bstr_t(L""), _bstr_t(L".\\localsystem"), _bstr_t(L""), FALSE));
b39297ae TS	319	chk(pCatalog->InstallComponent(_bstr_t(QGA_PROVIDER_LNAME),
	320	_bstr_t(dllPath), _bstr_t(tlbPath),
	321	_bstr_t("")));
	322
	323	/* Setup roles of the applicaion */
	324
009f38d9	325	chk(getNameByStringSID(administratorsGroupSID, buffer, &bufferLen));
b39297ae TS	326	chk(pApps->GetCollection(_bstr_t(L"Roles"), key,
	327	(IDispatch **)pRoles.replace()));
	328	chk(pRoles->Populate());
	329	chk(pRoles->Add((IDispatch **)pObj.replace()));
009f38d9	330	chk(put_Value(pObj, L"Name", buffer));
b39297ae TS	331	chk(put_Value(pObj, L"Description", L"Administrators group"));
	332	chk(pRoles->SaveChanges(&n));
	333	chk(pObj->get_Key(&key));
	334
	335	/* Setup users in the role */
	336
	337	chk(pRoles->GetCollection(_bstr_t(L"UsersInRole"), key,
	338	(IDispatch **)pUsersInRole.replace()));
	339	chk(pUsersInRole->Populate());
	340
	341	chk(pUsersInRole->Add((IDispatch **)pObj.replace()));
	342	chk(GetAdminName(&name));
	343	chk(put_Value(pObj, L"User", _bstr_t(".\\") + name));
	344
009f38d9 DR	345	bufferLen = BUFFER_SIZE;
009f38d9 DR	346	chk(getNameByStringSID(systemUserSID, buffer, &bufferLen));
b39297ae	347	chk(pUsersInRole->Add((IDispatch **)pObj.replace()));
009f38d9	348	chk(put_Value(pObj, L"User", buffer));
b39297ae TS	349	chk(pUsersInRole->SaveChanges(&n));
	350
	351	out:
	352	if (unregisterOnFailure && FAILED(hr)) {
	353	COMUnregister();
	354	}
	355
	356	return hr;
	357	}
	358
	359
	360	static BOOL CreateRegistryKey(LPCTSTR key, LPCTSTR value, LPCTSTR data)
	361	{
	362	HKEY hKey;
	363	LONG ret;
	364	DWORD size;
	365
	366	ret = RegCreateKeyEx(HKEY_CLASSES_ROOT, key, 0, NULL,
	367	REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL);
	368	if (ret != ERROR_SUCCESS) {
	369	goto out;
	370	}
	371
	372	if (data != NULL) {
	373	size = strlen(data) + 1;
	374	} else {
	375	size = 0;
	376	}
	377
	378	ret = RegSetValueEx(hKey, value, 0, REG_SZ, (LPBYTE)data, size);
	379	RegCloseKey(hKey);
	380
	381	out:
	382	if (ret != ERROR_SUCCESS) {
	383	/* As we cannot printf within DllRegisterServer(), show a dialog. */
	384	errmsg_dialog(ret, "Cannot add registry", key);
	385	return FALSE;
	386	}
	387	return TRUE;
	388	}
	389
	390	/* Register this dll as a VSS provider */
	391	STDAPI DllRegisterServer(void)
	392	{
	393	COMInitializer initializer;
	394	COMPointer<IVssAdmin> pVssAdmin;
	395	HRESULT hr = E_FAIL;
	396	char dllPath[MAX_PATH];
	397	char key[256];
	398
	399	if (!g_hinstDll) {
	400	errmsg_dialog(hr, "Module instance is not available");
	401	goto out;
	402	}
	403
	404	/* Add this module to registery */
	405
	406	sprintf(key, "CLSID\\%s", g_szClsid);
	407	if (!CreateRegistryKey(key, NULL, g_szClsid)) {
	408	goto out;
	409	}
	410
	411	if (!GetModuleFileName(g_hinstDll, dllPath, sizeof(dllPath))) {
	412	errmsg_dialog(GetLastError(), "GetModuleFileName failed");
413	goto out;
414	}
415
416	sprintf(key, "CLSID\\%s\\InprocServer32", g_szClsid);
417	if (!CreateRegistryKey(key, NULL, dllPath)) {
418	goto out;
419	}
420
421	if (!CreateRegistryKey(key, "ThreadingModel", "Apartment")) {
422	goto out;
423	}
424
425	sprintf(key, "CLSID\\%s\\ProgID", g_szClsid);
426	if (!CreateRegistryKey(key, NULL, g_szProgid)) {
427	goto out;
428	}
429
430	if (!CreateRegistryKey(g_szProgid, NULL, QGA_PROVIDER_NAME)) {
431	goto out;
432	}
433
434	sprintf(key, "%s\\CLSID", g_szProgid);
435	if (!CreateRegistryKey(key, NULL, g_szClsid)) {
436	goto out;
437	}
438
439	hr = CoCreateInstance(CLSID_VSSCoordinator, NULL, CLSCTX_ALL,
440	IID_IVssAdmin, (void **)pVssAdmin.replace());
441	if (FAILED(hr)) {
442	errmsg_dialog(hr, "CoCreateInstance(VSSCoordinator) failed");
443	goto out;
444	}
445
446	hr = pVssAdmin->RegisterProvider(g_gProviderId, CLSID_QGAVSSProvider,
447	const_cast<WCHAR*>(QGA_PROVIDER_LNAME),
448	VSS_PROV_SOFTWARE,
449	const_cast<WCHAR*>(QGA_PROVIDER_VERSION),
450	g_gProviderVersion);
b2413df8 SJ	451	if (hr == (long int) VSS_E_PROVIDER_ALREADY_REGISTERED) {
	452	DllUnregisterServer();
	453	hr = pVssAdmin->RegisterProvider(g_gProviderId, CLSID_QGAVSSProvider,
	454	const_cast<WCHAR * >
	455	(QGA_PROVIDER_LNAME),
	456	VSS_PROV_SOFTWARE,
	457	const_cast<WCHAR * >
	458	(QGA_PROVIDER_VERSION),
	459	g_gProviderVersion);
	460	}
	461
b39297ae TS	462	if (FAILED(hr)) {
	463	errmsg_dialog(hr, "RegisterProvider failed");
	464	}
	465
	466	out:
	467	if (FAILED(hr)) {
	468	DllUnregisterServer();
	469	}
	470
	471	return hr;
	472	}
	473
	474	/* Unregister this VSS hardware provider from the system */
	475	STDAPI DllUnregisterServer(void)
	476	{
	477	TCHAR key[256];
	478	COMInitializer initializer;
	479	COMPointer<IVssAdmin> pVssAdmin;
	480
	481	HRESULT hr = CoCreateInstance(CLSID_VSSCoordinator,
	482	NULL, CLSCTX_ALL, IID_IVssAdmin,
	483	(void **)pVssAdmin.replace());
	484	if (SUCCEEDED(hr)) {
	485	hr = pVssAdmin->UnregisterProvider(g_gProviderId);
	486	} else {
	487	errmsg(hr, "CoCreateInstance(VSSCoordinator) failed");
	488	}
	489
	490	sprintf(key, "CLSID\\%s", g_szClsid);
	491	SHDeleteKey(HKEY_CLASSES_ROOT, key);
	492	SHDeleteKey(HKEY_CLASSES_ROOT, g_szProgid);
	493
	494	return S_OK; /* Uninstall should never fail */
	495	}
	496
	497
	498	/* Support function to convert ASCII string into BSTR (used in _bstr_t) */
	499	namespace _com_util
	500	{
	501	BSTR WINAPI ConvertStringToBSTR(const char *ascii) {
	502	int len = strlen(ascii);
	503	BSTR bstr = SysAllocStringLen(NULL, len);
	504
	505	if (!bstr) {
	506	return NULL;
	507	}
	508
	509	if (mbstowcs(bstr, ascii, len) == (size_t)-1) {
	510	fprintf(stderr, "Failed to convert string '%s' into BSTR", ascii);
	511	bstr[0] = 0;
	512	}
	513	return bstr;
	514	}
	515	}
f342cc93	516
917ebcb1	517	/* Stop QGA VSS provider service using Winsvc API */
f342cc93 SJ	518	STDAPI StopService(void)
	519	{
	520	HRESULT hr;
917ebcb1 BS	521	SC_HANDLE manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
917ebcb1 BS	522	SC_HANDLE service = NULL;
f342cc93	523
917ebcb1 BS	524	if (!manager) {
	525	errmsg(E_FAIL, "Failed to open service manager");
	526	hr = E_FAIL;
	527	goto out;
	528	}
	529	service = OpenService(manager, QGA_PROVIDER_NAME, SC_MANAGER_ALL_ACCESS);
f342cc93	530
917ebcb1 BS	531	if (!service) {
	532	errmsg(E_FAIL, "Failed to open service");
	533	hr = E_FAIL;
	534	goto out;
	535	}
	536	if (!(ControlService(service, SERVICE_CONTROL_STOP, NULL))) {
	537	errmsg(E_FAIL, "Failed to stop service");
	538	hr = E_FAIL;
f342cc93 SJ	539	}
	540
	541	out:
917ebcb1 BS	542	CloseServiceHandle(service);
917ebcb1 BS	543	CloseServiceHandle(manager);
f342cc93 SJ	544	return hr;
f342cc93 SJ	545	}