| 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 | |
| 13 | #include "qemu/osdep.h" |
| 14 | |
| 15 | #include "vss-common.h" |
| 16 | #include "vss-debug.h" |
| 17 | #ifdef HAVE_VSS_SDK |
| 18 | #include <vscoordint.h> |
| 19 | #else |
| 20 | #include <vsadmin.h> |
| 21 | #endif |
| 22 | #include "install.h" |
| 23 | #include <wbemidl.h> |
| 24 | #include <comdef.h> |
| 25 | #include <comutil.h> |
| 26 | #include <sddl.h> |
| 27 | #include <winsvc.h> |
| 28 | |
| 29 | #define BUFFER_SIZE 1024 |
| 30 | |
| 31 | extern HINSTANCE g_hinstDll; |
| 32 | |
| 33 | const GUID CLSID_COMAdminCatalog = { 0xF618C514, 0xDFB8, 0x11d1, |
| 34 | {0xA2, 0xCF, 0x00, 0x80, 0x5F, 0xC7, 0x92, 0x35} }; |
| 35 | const GUID IID_ICOMAdminCatalog2 = { 0x790C6E0B, 0x9194, 0x4cc9, |
| 36 | {0x94, 0x26, 0xA4, 0x8A, 0x63, 0x18, 0x56, 0x96} }; |
| 37 | const GUID CLSID_WbemLocator = { 0x4590f811, 0x1d3a, 0x11d0, |
| 38 | {0x89, 0x1f, 0x00, 0xaa, 0x00, 0x4b, 0x2e, 0x24} }; |
| 39 | const GUID IID_IWbemLocator = { 0xdc12a687, 0x737f, 0x11cf, |
| 40 | {0x88, 0x4d, 0x00, 0xaa, 0x00, 0x4b, 0x2e, 0x24} }; |
| 41 | |
| 42 | static void errmsg(DWORD err, const char *text) |
| 43 | { |
| 44 | /* |
| 45 | * `text' contains function call statement when errmsg is called via chk(). |
| 46 | * To make error message more readable, we cut off the text after '('. |
| 47 | * If text doesn't contains '(', negative precision is given, which is |
| 48 | * treated as though it were missing. |
| 49 | */ |
| 50 | char *msg = NULL; |
| 51 | const char *nul = strchr(text, '('); |
| 52 | int len = nul ? nul - text : -1; |
| 53 | |
| 54 | FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
| 55 | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, |
| 56 | NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
| 57 | (char *)&msg, 0, NULL); |
| 58 | qga_debug("%.*s. (Error: %lx) %s", len, text, err, msg); |
| 59 | LocalFree(msg); |
| 60 | } |
| 61 | |
| 62 | static void errmsg_dialog(DWORD err, const char *text, const char *opt = "") |
| 63 | { |
| 64 | char *msg, buf[512]; |
| 65 | |
| 66 | FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | |
| 67 | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, |
| 68 | NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), |
| 69 | (char *)&msg, 0, NULL); |
| 70 | snprintf(buf, sizeof(buf), "%s%s. (Error: %lx) %s", text, opt, err, msg); |
| 71 | MessageBox(NULL, buf, "Error from " QGA_PROVIDER_NAME, MB_OK|MB_ICONERROR); |
| 72 | LocalFree(msg); |
| 73 | } |
| 74 | |
| 75 | #define _chk(hr, status, msg, err_label) \ |
| 76 | do { \ |
| 77 | hr = (status); \ |
| 78 | if (FAILED(hr)) { \ |
| 79 | errmsg(hr, msg); \ |
| 80 | goto err_label; \ |
| 81 | } \ |
| 82 | } while (0) |
| 83 | |
| 84 | #define chk(status) _chk(hr, status, "Failed to " #status, out) |
| 85 | |
| 86 | #if !defined(__MINGW64_VERSION_MAJOR) || !defined(__MINGW64_VERSION_MINOR) || \ |
| 87 | __MINGW64_VERSION_MAJOR * 100 + __MINGW64_VERSION_MINOR < 301 |
| 88 | void __stdcall _com_issue_error(HRESULT hr) |
| 89 | { |
| 90 | errmsg(hr, "Unexpected error in COM"); |
| 91 | } |
| 92 | #endif |
| 93 | |
| 94 | template<class T> |
| 95 | HRESULT put_Value(ICatalogObject *pObj, LPCWSTR name, T val) |
| 96 | { |
| 97 | return pObj->put_Value(_bstr_t(name), _variant_t(val)); |
| 98 | } |
| 99 | |
| 100 | /* Lookup Administrators group name from winmgmt */ |
| 101 | static HRESULT GetAdminName(_bstr_t *name) |
| 102 | { |
| 103 | qga_debug_begin; |
| 104 | |
| 105 | HRESULT hr; |
| 106 | COMPointer<IWbemLocator> pLoc; |
| 107 | COMPointer<IWbemServices> pSvc; |
| 108 | COMPointer<IEnumWbemClassObject> pEnum; |
| 109 | COMPointer<IWbemClassObject> pWobj; |
| 110 | ULONG returned; |
| 111 | _variant_t var; |
| 112 | |
| 113 | chk(CoCreateInstance(CLSID_WbemLocator, NULL, CLSCTX_INPROC_SERVER, |
| 114 | IID_IWbemLocator, (LPVOID *)pLoc.replace())); |
| 115 | chk(pLoc->ConnectServer(_bstr_t(L"ROOT\\CIMV2"), NULL, NULL, NULL, |
| 116 | 0, 0, 0, pSvc.replace())); |
| 117 | chk(CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, |
| 118 | NULL, RPC_C_AUTHN_LEVEL_CALL, |
| 119 | RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE)); |
| 120 | chk(pSvc->ExecQuery(_bstr_t(L"WQL"), |
| 121 | _bstr_t(L"select * from Win32_Account where " |
| 122 | "SID='S-1-5-32-544' and localAccount=TRUE"), |
| 123 | WBEM_FLAG_RETURN_IMMEDIATELY | WBEM_FLAG_FORWARD_ONLY, |
| 124 | NULL, pEnum.replace())); |
| 125 | if (!pEnum) { |
| 126 | hr = E_FAIL; |
| 127 | errmsg(hr, "Failed to query for Administrators"); |
| 128 | goto out; |
| 129 | } |
| 130 | chk(pEnum->Next(WBEM_INFINITE, 1, pWobj.replace(), &returned)); |
| 131 | if (returned == 0) { |
| 132 | hr = E_FAIL; |
| 133 | errmsg(hr, "No Administrators found"); |
| 134 | goto out; |
| 135 | } |
| 136 | |
| 137 | chk(pWobj->Get(_bstr_t(L"Name"), 0, &var, 0, 0)); |
| 138 | try { |
| 139 | *name = var; |
| 140 | } catch(...) { |
| 141 | hr = E_FAIL; |
| 142 | errmsg(hr, "Failed to get name of Administrators"); |
| 143 | goto out; |
| 144 | } |
| 145 | |
| 146 | out: |
| 147 | qga_debug_end; |
| 148 | return hr; |
| 149 | } |
| 150 | |
| 151 | /* Acquire group or user name by SID */ |
| 152 | static HRESULT getNameByStringSID( |
| 153 | const wchar_t *sid, LPWSTR buffer, LPDWORD bufferLen) |
| 154 | { |
| 155 | qga_debug_begin; |
| 156 | |
| 157 | HRESULT hr = S_OK; |
| 158 | PSID psid = NULL; |
| 159 | SID_NAME_USE groupType; |
| 160 | DWORD domainNameLen = BUFFER_SIZE; |
| 161 | wchar_t domainName[BUFFER_SIZE]; |
| 162 | |
| 163 | if (!ConvertStringSidToSidW(sid, &psid)) { |
| 164 | hr = HRESULT_FROM_WIN32(GetLastError()); |
| 165 | goto out; |
| 166 | } |
| 167 | if (!LookupAccountSidW(NULL, psid, buffer, bufferLen, |
| 168 | domainName, &domainNameLen, &groupType)) { |
| 169 | hr = HRESULT_FROM_WIN32(GetLastError()); |
| 170 | /* Fall through and free psid */ |
| 171 | } |
| 172 | |
| 173 | LocalFree(psid); |
| 174 | |
| 175 | out: |
| 176 | qga_debug_end; |
| 177 | return hr; |
| 178 | } |
| 179 | |
| 180 | /* Find and iterate QGA VSS provider in COM+ Application Catalog */ |
| 181 | static HRESULT QGAProviderFind( |
| 182 | HRESULT (*found)(ICatalogCollection *, int, void *), void *arg) |
| 183 | { |
| 184 | qga_debug_begin; |
| 185 | |
| 186 | HRESULT hr; |
| 187 | COMInitializer initializer; |
| 188 | COMPointer<IUnknown> pUnknown; |
| 189 | COMPointer<ICOMAdminCatalog2> pCatalog; |
| 190 | COMPointer<ICatalogCollection> pColl; |
| 191 | COMPointer<ICatalogObject> pObj; |
| 192 | _variant_t var; |
| 193 | long i, n; |
| 194 | |
| 195 | chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER, |
| 196 | IID_IUnknown, (void **)pUnknown.replace())); |
| 197 | chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2, |
| 198 | (void **)pCatalog.replace())); |
| 199 | chk(pCatalog->GetCollection(_bstr_t(L"Applications"), |
| 200 | (IDispatch **)pColl.replace())); |
| 201 | chk(pColl->Populate()); |
| 202 | |
| 203 | chk(pColl->get_Count(&n)); |
| 204 | for (i = n - 1; i >= 0; i--) { |
| 205 | chk(pColl->get_Item(i, (IDispatch **)pObj.replace())); |
| 206 | chk(pObj->get_Value(_bstr_t(L"Name"), &var)); |
| 207 | if (var == _variant_t(QGA_PROVIDER_LNAME)) { |
| 208 | if (FAILED(found(pColl, i, arg))) { |
| 209 | goto out; |
| 210 | } |
| 211 | } |
| 212 | } |
| 213 | chk(pColl->SaveChanges(&n)); |
| 214 | |
| 215 | out: |
| 216 | qga_debug_end; |
| 217 | return hr; |
| 218 | } |
| 219 | |
| 220 | /* Count QGA VSS provider in COM+ Application Catalog */ |
| 221 | static HRESULT QGAProviderCount(ICatalogCollection *coll, int i, void *arg) |
| 222 | { |
| 223 | qga_debug_begin; |
| 224 | |
| 225 | (*(int *)arg)++; |
| 226 | |
| 227 | qga_debug_end; |
| 228 | return S_OK; |
| 229 | } |
| 230 | |
| 231 | /* Remove QGA VSS provider from COM+ Application Catalog Collection */ |
| 232 | static HRESULT QGAProviderRemove(ICatalogCollection *coll, int i, void *arg) |
| 233 | { |
| 234 | qga_debug_begin; |
| 235 | HRESULT hr; |
| 236 | |
| 237 | qga_debug("Removing COM+ Application: %s", QGA_PROVIDER_NAME); |
| 238 | chk(coll->Remove(i)); |
| 239 | out: |
| 240 | qga_debug_end; |
| 241 | return hr; |
| 242 | } |
| 243 | |
| 244 | /* Unregister this module from COM+ Applications Catalog */ |
| 245 | STDAPI COMUnregister(void); |
| 246 | STDAPI COMUnregister(void) |
| 247 | { |
| 248 | qga_debug_begin; |
| 249 | |
| 250 | HRESULT hr; |
| 251 | |
| 252 | DllUnregisterServer(); |
| 253 | chk(QGAProviderFind(QGAProviderRemove, NULL)); |
| 254 | out: |
| 255 | qga_debug_end; |
| 256 | return hr; |
| 257 | } |
| 258 | |
| 259 | /* Register this module to COM+ Applications Catalog */ |
| 260 | STDAPI COMRegister(void); |
| 261 | STDAPI COMRegister(void) |
| 262 | { |
| 263 | qga_debug_begin; |
| 264 | |
| 265 | HRESULT hr; |
| 266 | COMInitializer initializer; |
| 267 | COMPointer<IUnknown> pUnknown; |
| 268 | COMPointer<ICOMAdminCatalog2> pCatalog; |
| 269 | COMPointer<ICatalogCollection> pApps, pRoles, pUsersInRole; |
| 270 | COMPointer<ICatalogObject> pObj; |
| 271 | long n; |
| 272 | _bstr_t name; |
| 273 | _variant_t key; |
| 274 | CHAR dllPath[MAX_PATH], tlbPath[MAX_PATH]; |
| 275 | bool unregisterOnFailure = false; |
| 276 | int count = 0; |
| 277 | DWORD bufferLen = BUFFER_SIZE; |
| 278 | wchar_t buffer[BUFFER_SIZE]; |
| 279 | const wchar_t *administratorsGroupSID = L"S-1-5-32-544"; |
| 280 | const wchar_t *systemUserSID = L"S-1-5-18"; |
| 281 | |
| 282 | if (!g_hinstDll) { |
| 283 | errmsg(E_FAIL, "Failed to initialize DLL"); |
| 284 | qga_debug_end; |
| 285 | return E_FAIL; |
| 286 | } |
| 287 | |
| 288 | chk(QGAProviderFind(QGAProviderCount, (void *)&count)); |
| 289 | if (count) { |
| 290 | qga_debug("QGA VSS Provider is already installed. Attempting to unregister first."); |
| 291 | hr = COMUnregister(); |
| 292 | if (FAILED(hr)) { |
| 293 | errmsg(hr, "Failed to unregister existing QGA VSS Provider. Aborting installation."); |
| 294 | qga_debug_end; |
| 295 | return E_ABORT; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER, |
| 300 | IID_IUnknown, (void **)pUnknown.replace())); |
| 301 | chk(pUnknown->QueryInterface(IID_ICOMAdminCatalog2, |
| 302 | (void **)pCatalog.replace())); |
| 303 | |
| 304 | /* Install COM+ Component */ |
| 305 | |
| 306 | chk(pCatalog->GetCollection(_bstr_t(L"Applications"), |
| 307 | (IDispatch **)pApps.replace())); |
| 308 | chk(pApps->Populate()); |
| 309 | chk(pApps->Add((IDispatch **)&pObj)); |
| 310 | chk(put_Value(pObj, L"Name", QGA_PROVIDER_LNAME)); |
| 311 | chk(put_Value(pObj, L"Description", QGA_PROVIDER_LNAME)); |
| 312 | chk(put_Value(pObj, L"ApplicationAccessChecksEnabled", true)); |
| 313 | chk(put_Value(pObj, L"Authentication", short(6))); |
| 314 | chk(put_Value(pObj, L"AuthenticationCapability", short(2))); |
| 315 | chk(put_Value(pObj, L"ImpersonationLevel", short(2))); |
| 316 | chk(pApps->SaveChanges(&n)); |
| 317 | |
| 318 | /* The app should be deleted if something fails after SaveChanges */ |
| 319 | unregisterOnFailure = true; |
| 320 | |
| 321 | chk(pObj->get_Key(&key)); |
| 322 | |
| 323 | if (!GetModuleFileName(g_hinstDll, dllPath, sizeof(dllPath))) { |
| 324 | hr = HRESULT_FROM_WIN32(GetLastError()); |
| 325 | errmsg(hr, "GetModuleFileName failed"); |
| 326 | goto out; |
| 327 | } |
| 328 | n = strlen(dllPath); |
| 329 | if (n < 3) { |
| 330 | hr = E_FAIL; |
| 331 | errmsg(hr, "Failed to lookup dll"); |
| 332 | goto out; |
| 333 | } |
| 334 | strcpy(tlbPath, dllPath); |
| 335 | strcpy(tlbPath+n-3, "tlb"); |
| 336 | qga_debug("Registering " QGA_PROVIDER_NAME ": %s %s", |
| 337 | dllPath, tlbPath); |
| 338 | if (!PathFileExists(tlbPath)) { |
| 339 | hr = HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND); |
| 340 | errmsg(hr, "Failed to lookup tlb"); |
| 341 | goto out; |
| 342 | } |
| 343 | |
| 344 | chk(pCatalog->CreateServiceForApplication( |
| 345 | _bstr_t(QGA_PROVIDER_LNAME), _bstr_t(QGA_PROVIDER_LNAME), |
| 346 | _bstr_t(L"SERVICE_DEMAND_START"), _bstr_t(L"SERVICE_ERROR_NORMAL"), |
| 347 | _bstr_t(L""), _bstr_t(L".\\localsystem"), _bstr_t(L""), FALSE)); |
| 348 | chk(pCatalog->InstallComponent(_bstr_t(QGA_PROVIDER_LNAME), |
| 349 | _bstr_t(dllPath), _bstr_t(tlbPath), |
| 350 | _bstr_t(""))); |
| 351 | |
| 352 | /* Setup roles of the application */ |
| 353 | |
| 354 | chk(getNameByStringSID(administratorsGroupSID, buffer, &bufferLen)); |
| 355 | chk(pApps->GetCollection(_bstr_t(L"Roles"), key, |
| 356 | (IDispatch **)pRoles.replace())); |
| 357 | chk(pRoles->Populate()); |
| 358 | chk(pRoles->Add((IDispatch **)pObj.replace())); |
| 359 | chk(put_Value(pObj, L"Name", buffer)); |
| 360 | chk(put_Value(pObj, L"Description", L"Administrators group")); |
| 361 | chk(pRoles->SaveChanges(&n)); |
| 362 | chk(pObj->get_Key(&key)); |
| 363 | |
| 364 | /* Setup users in the role */ |
| 365 | |
| 366 | chk(pRoles->GetCollection(_bstr_t(L"UsersInRole"), key, |
| 367 | (IDispatch **)pUsersInRole.replace())); |
| 368 | chk(pUsersInRole->Populate()); |
| 369 | |
| 370 | chk(pUsersInRole->Add((IDispatch **)pObj.replace())); |
| 371 | chk(GetAdminName(&name)); |
| 372 | chk(put_Value(pObj, L"User", _bstr_t(".\\") + name)); |
| 373 | |
| 374 | bufferLen = BUFFER_SIZE; |
| 375 | chk(getNameByStringSID(systemUserSID, buffer, &bufferLen)); |
| 376 | chk(pUsersInRole->Add((IDispatch **)pObj.replace())); |
| 377 | chk(put_Value(pObj, L"User", buffer)); |
| 378 | chk(pUsersInRole->SaveChanges(&n)); |
| 379 | |
| 380 | out: |
| 381 | if (unregisterOnFailure && FAILED(hr)) { |
| 382 | COMUnregister(); |
| 383 | } |
| 384 | |
| 385 | qga_debug_end; |
| 386 | return hr; |
| 387 | } |
| 388 | |
| 389 | STDAPI_(void) CALLBACK DLLCOMRegister(HWND, HINSTANCE, LPSTR, int); |
| 390 | STDAPI_(void) CALLBACK DLLCOMRegister(HWND, HINSTANCE, LPSTR, int) |
| 391 | { |
| 392 | HRESULT hr = COMRegister(); |
| 393 | if (FAILED(hr)) { |
| 394 | exit(hr); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | STDAPI_(void) CALLBACK DLLCOMUnregister(HWND, HINSTANCE, LPSTR, int); |
| 399 | STDAPI_(void) CALLBACK DLLCOMUnregister(HWND, HINSTANCE, LPSTR, int) |
| 400 | { |
| 401 | COMUnregister(); |
| 402 | } |
| 403 | |
| 404 | static BOOL CreateRegistryKey(LPCTSTR key, LPCTSTR value, LPCTSTR data) |
| 405 | { |
| 406 | qga_debug_begin; |
| 407 | |
| 408 | HKEY hKey; |
| 409 | LONG ret; |
| 410 | DWORD size; |
| 411 | |
| 412 | ret = RegCreateKeyEx(HKEY_CLASSES_ROOT, key, 0, NULL, |
| 413 | REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKey, NULL); |
| 414 | if (ret != ERROR_SUCCESS) { |
| 415 | goto out; |
| 416 | } |
| 417 | |
| 418 | if (data != NULL) { |
| 419 | size = strlen(data) + 1; |
| 420 | } else { |
| 421 | size = 0; |
| 422 | } |
| 423 | |
| 424 | ret = RegSetValueEx(hKey, value, 0, REG_SZ, (LPBYTE)data, size); |
| 425 | RegCloseKey(hKey); |
| 426 | |
| 427 | out: |
| 428 | qga_debug_end; |
| 429 | if (ret != ERROR_SUCCESS) { |
| 430 | /* As we cannot printf within DllRegisterServer(), show a dialog. */ |
| 431 | errmsg_dialog(ret, "Cannot add registry", key); |
| 432 | return FALSE; |
| 433 | } |
| 434 | return TRUE; |
| 435 | } |
| 436 | |
| 437 | /* Register this dll as a VSS provider */ |
| 438 | STDAPI DllRegisterServer(void) |
| 439 | { |
| 440 | qga_debug_begin; |
| 441 | |
| 442 | COMInitializer initializer; |
| 443 | COMPointer<IVssAdmin> pVssAdmin; |
| 444 | HRESULT hr = E_FAIL; |
| 445 | char dllPath[MAX_PATH]; |
| 446 | char key[256]; |
| 447 | |
| 448 | if (!g_hinstDll) { |
| 449 | errmsg_dialog(hr, "Module instance is not available"); |
| 450 | goto out; |
| 451 | } |
| 452 | |
| 453 | /* Add this module to registry */ |
| 454 | |
| 455 | sprintf(key, "CLSID\\%s", g_szClsid); |
| 456 | if (!CreateRegistryKey(key, NULL, g_szClsid)) { |
| 457 | goto out; |
| 458 | } |
| 459 | |
| 460 | if (!GetModuleFileName(g_hinstDll, dllPath, sizeof(dllPath))) { |
| 461 | errmsg_dialog(GetLastError(), "GetModuleFileName failed"); |
| 462 | goto out; |
| 463 | } |
| 464 | |
| 465 | sprintf(key, "CLSID\\%s\\InprocServer32", g_szClsid); |
| 466 | if (!CreateRegistryKey(key, NULL, dllPath)) { |
| 467 | goto out; |
| 468 | } |
| 469 | |
| 470 | if (!CreateRegistryKey(key, "ThreadingModel", "Apartment")) { |
| 471 | goto out; |
| 472 | } |
| 473 | |
| 474 | sprintf(key, "CLSID\\%s\\ProgID", g_szClsid); |
| 475 | if (!CreateRegistryKey(key, NULL, g_szProgid)) { |
| 476 | goto out; |
| 477 | } |
| 478 | |
| 479 | if (!CreateRegistryKey(g_szProgid, NULL, QGA_PROVIDER_NAME)) { |
| 480 | goto out; |
| 481 | } |
| 482 | |
| 483 | sprintf(key, "%s\\CLSID", g_szProgid); |
| 484 | if (!CreateRegistryKey(key, NULL, g_szClsid)) { |
| 485 | goto out; |
| 486 | } |
| 487 | |
| 488 | hr = CoCreateInstance(CLSID_VSSCoordinator, NULL, CLSCTX_ALL, |
| 489 | IID_IVssAdmin, (void **)pVssAdmin.replace()); |
| 490 | if (FAILED(hr)) { |
| 491 | errmsg_dialog(hr, "CoCreateInstance(VSSCoordinator) failed"); |
| 492 | goto out; |
| 493 | } |
| 494 | |
| 495 | hr = pVssAdmin->RegisterProvider(g_gProviderId, CLSID_QGAVSSProvider, |
| 496 | const_cast<WCHAR*>(QGA_PROVIDER_LNAME), |
| 497 | VSS_PROV_SOFTWARE, |
| 498 | const_cast<WCHAR*>(QGA_PROVIDER_VERSION), |
| 499 | g_gProviderVersion); |
| 500 | if (hr == (long int) VSS_E_PROVIDER_ALREADY_REGISTERED) { |
| 501 | DllUnregisterServer(); |
| 502 | hr = pVssAdmin->RegisterProvider(g_gProviderId, CLSID_QGAVSSProvider, |
| 503 | const_cast<WCHAR * > |
| 504 | (QGA_PROVIDER_LNAME), |
| 505 | VSS_PROV_SOFTWARE, |
| 506 | const_cast<WCHAR * > |
| 507 | (QGA_PROVIDER_VERSION), |
| 508 | g_gProviderVersion); |
| 509 | } |
| 510 | |
| 511 | if (FAILED(hr)) { |
| 512 | errmsg_dialog(hr, "RegisterProvider failed"); |
| 513 | } |
| 514 | |
| 515 | out: |
| 516 | if (FAILED(hr)) { |
| 517 | DllUnregisterServer(); |
| 518 | } |
| 519 | |
| 520 | qga_debug_end; |
| 521 | return hr; |
| 522 | } |
| 523 | |
| 524 | /* Unregister this VSS hardware provider from the system */ |
| 525 | STDAPI DllUnregisterServer(void) |
| 526 | { |
| 527 | qga_debug_begin; |
| 528 | |
| 529 | TCHAR key[256]; |
| 530 | COMInitializer initializer; |
| 531 | COMPointer<IVssAdmin> pVssAdmin; |
| 532 | |
| 533 | HRESULT hr = CoCreateInstance(CLSID_VSSCoordinator, |
| 534 | NULL, CLSCTX_ALL, IID_IVssAdmin, |
| 535 | (void **)pVssAdmin.replace()); |
| 536 | if (SUCCEEDED(hr)) { |
| 537 | hr = pVssAdmin->UnregisterProvider(g_gProviderId); |
| 538 | } else { |
| 539 | errmsg(hr, "CoCreateInstance(VSSCoordinator) failed"); |
| 540 | } |
| 541 | |
| 542 | sprintf(key, "CLSID\\%s", g_szClsid); |
| 543 | SHDeleteKey(HKEY_CLASSES_ROOT, key); |
| 544 | SHDeleteKey(HKEY_CLASSES_ROOT, g_szProgid); |
| 545 | |
| 546 | qga_debug_end; |
| 547 | return S_OK; /* Uninstall should never fail */ |
| 548 | } |
| 549 | |
| 550 | |
| 551 | /* Support function to convert ASCII string into BSTR (used in _bstr_t) */ |
| 552 | #ifndef CONFIG_CONVERT_STRING_TO_BSTR |
| 553 | namespace _com_util |
| 554 | { |
| 555 | BSTR WINAPI ConvertStringToBSTR(const char *ascii) { |
| 556 | int len = strlen(ascii); |
| 557 | BSTR bstr = SysAllocStringLen(NULL, len); |
| 558 | |
| 559 | if (!bstr) { |
| 560 | return NULL; |
| 561 | } |
| 562 | |
| 563 | if (mbstowcs(bstr, ascii, len) == (size_t)-1) { |
| 564 | qga_debug("Failed to convert string '%s' into BSTR", ascii); |
| 565 | bstr[0] = 0; |
| 566 | } |
| 567 | return bstr; |
| 568 | } |
| 569 | } |
| 570 | #endif |
| 571 | |
| 572 | /* Stop QGA VSS provider service using Winsvc API */ |
| 573 | STDAPI StopService(void) |
| 574 | { |
| 575 | qga_debug_begin; |
| 576 | |
| 577 | HRESULT hr = S_OK; |
| 578 | SC_HANDLE manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS); |
| 579 | SC_HANDLE service = NULL; |
| 580 | |
| 581 | if (!manager) { |
| 582 | errmsg(E_FAIL, "Failed to open service manager"); |
| 583 | hr = E_FAIL; |
| 584 | goto out; |
| 585 | } |
| 586 | service = OpenService(manager, QGA_PROVIDER_NAME, SC_MANAGER_ALL_ACCESS); |
| 587 | |
| 588 | if (!service) { |
| 589 | errmsg(E_FAIL, "Failed to open service"); |
| 590 | hr = E_FAIL; |
| 591 | goto out; |
| 592 | } |
| 593 | if (!(ControlService(service, SERVICE_CONTROL_STOP, NULL))) { |
| 594 | errmsg(E_FAIL, "Failed to stop service"); |
| 595 | hr = E_FAIL; |
| 596 | } |
| 597 | |
| 598 | out: |
| 599 | CloseServiceHandle(service); |
| 600 | CloseServiceHandle(manager); |
| 601 | qga_debug_end; |
| 602 | return hr; |
| 603 | } |