1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "content/common/plugin_list.h" 6 7 #include <set> 8 9 #include "base/basictypes.h" 10 #include "base/file_util.h" 11 #include "base/file_version_info.h" 12 #include "base/file_version_info_win.h" 13 #include "base/files/memory_mapped_file.h" 14 #include "base/memory/scoped_ptr.h" 15 #include "base/path_service.h" 16 #include "base/strings/string_number_conversions.h" 17 #include "base/strings/string_split.h" 18 #include "base/strings/string_util.h" 19 #include "base/win/pe_image.h" 20 #include "base/win/registry.h" 21 #include "base/win/scoped_handle.h" 22 #include "base/win/windows_version.h" 23 #include "content/common/plugin_constants_win.h" 24 25 namespace content { 26 namespace { 27 28 const char16 kRegistryApps[] = 29 L"Software\\Microsoft\\Windows\\CurrentVersion\\App Paths"; 30 const char16 kRegistryFirefox[] = L"firefox.exe"; 31 const char16 kRegistryAcrobat[] = L"Acrobat.exe"; 32 const char16 kRegistryAcrobatReader[] = L"AcroRd32.exe"; 33 const char16 kRegistryWindowsMedia[] = L"wmplayer.exe"; 34 const char16 kRegistryQuickTime[] = L"QuickTimePlayer.exe"; 35 const char16 kRegistryPath[] = L"Path"; 36 const char16 kRegistryFirefoxInstalled[] = 37 L"SOFTWARE\\Mozilla\\Mozilla Firefox"; 38 const char16 kRegistryJava[] = 39 L"Software\\JavaSoft\\Java Runtime Environment"; 40 const char16 kRegistryBrowserJavaVersion[] = L"BrowserJavaVersion"; 41 const char16 kRegistryCurrentJavaVersion[] = L"CurrentVersion"; 42 const char16 kRegistryJavaHome[] = L"JavaHome"; 43 const char16 kJavaDeploy1[] = L"npdeploytk.dll"; 44 const char16 kJavaDeploy2[] = L"npdeployjava1.dll"; 45 46 base::FilePath AppendPluginsDir(const base::FilePath& path) { 47 return path.AppendASCII("plugins"); 48 } 49 50 // Gets the directory where the application data and libraries exist. This 51 // may be a versioned subdirectory, or it may be the same directory as the 52 // GetExeDirectory(), depending on the embedder's implementation. 53 // Path is an output parameter to receive the path. 54 void GetAppDirectory(std::set<base::FilePath>* plugin_dirs) { 55 base::FilePath app_path; 56 if (!PathService::Get(base::DIR_MODULE, &app_path)) 57 return; 58 plugin_dirs->insert(AppendPluginsDir(app_path)); 59 } 60 61 // Gets the directory where the launching executable resides on disk. 62 // Path is an output parameter to receive the path. 63 void GetExeDirectory(std::set<base::FilePath>* plugin_dirs) { 64 base::FilePath exe_path; 65 if (!PathService::Get(base::DIR_EXE, &exe_path)) 66 return; 67 plugin_dirs->insert(AppendPluginsDir(exe_path)); 68 } 69 70 // Gets the installed path for a registered app. 71 bool GetInstalledPath(const char16* app, base::FilePath* out) { 72 base::string16 reg_path(kRegistryApps); 73 reg_path.append(L"\\"); 74 reg_path.append(app); 75 76 base::win::RegKey hkcu_key(HKEY_CURRENT_USER, reg_path.c_str(), KEY_READ); 77 base::string16 path; 78 // As of Win7 AppPaths can also be registered in HKCU: http://goo.gl/UgFOf. 79 if (base::win::GetVersion() >= base::win::VERSION_WIN7 && 80 hkcu_key.ReadValue(kRegistryPath, &path) == ERROR_SUCCESS) { 81 *out = base::FilePath(path); 82 return true; 83 } else { 84 base::win::RegKey hklm_key(HKEY_LOCAL_MACHINE, reg_path.c_str(), KEY_READ); 85 if (hklm_key.ReadValue(kRegistryPath, &path) == ERROR_SUCCESS) { 86 *out = base::FilePath(path); 87 return true; 88 } 89 } 90 91 return false; 92 } 93 94 // Search the registry at the given path and detect plugin directories. 95 void GetPluginsInRegistryDirectory( 96 HKEY root_key, 97 const base::string16& registry_folder, 98 std::set<base::FilePath>* plugin_dirs) { 99 for (base::win::RegistryKeyIterator iter(root_key, registry_folder.c_str()); 100 iter.Valid(); ++iter) { 101 // Use the registry to gather plugin across the file system. 102 base::string16 reg_path = registry_folder; 103 reg_path.append(L"\\"); 104 reg_path.append(iter.Name()); 105 base::win::RegKey key(root_key, reg_path.c_str(), KEY_READ); 106 107 base::string16 path; 108 if (key.ReadValue(kRegistryPath, &path) == ERROR_SUCCESS) 109 plugin_dirs->insert(base::FilePath(path)); 110 } 111 } 112 113 // Enumerate through the registry key to find all installed FireFox paths. 114 // FireFox 3 beta and version 2 can coexist. See bug: 1025003 115 void GetFirefoxInstalledPaths(std::vector<base::FilePath>* out) { 116 base::win::RegistryKeyIterator it(HKEY_LOCAL_MACHINE, 117 kRegistryFirefoxInstalled); 118 for (; it.Valid(); ++it) { 119 base::string16 full_path = base::string16(kRegistryFirefoxInstalled) + 120 L"\\" + it.Name() + L"\\Main"; 121 base::win::RegKey key(HKEY_LOCAL_MACHINE, full_path.c_str(), KEY_READ); 122 base::string16 install_dir; 123 if (key.ReadValue(L"Install Directory", &install_dir) != ERROR_SUCCESS) 124 continue; 125 out->push_back(base::FilePath(install_dir)); 126 } 127 } 128 129 // Get plugin directory locations from the Firefox install path. This is kind 130 // of a kludge, but it helps us locate the flash player for users that 131 // already have it for firefox. Not having to download yet-another-plugin 132 // is a good thing. 133 void GetFirefoxDirectory(std::set<base::FilePath>* plugin_dirs) { 134 std::vector<base::FilePath> paths; 135 GetFirefoxInstalledPaths(&paths); 136 for (unsigned int i = 0; i < paths.size(); ++i) { 137 plugin_dirs->insert(AppendPluginsDir(paths[i])); 138 } 139 140 base::FilePath firefox_app_data_plugin_path; 141 if (PathService::Get(base::DIR_APP_DATA, &firefox_app_data_plugin_path)) { 142 firefox_app_data_plugin_path = 143 firefox_app_data_plugin_path.AppendASCII("Mozilla"); 144 plugin_dirs->insert(AppendPluginsDir(firefox_app_data_plugin_path)); 145 } 146 } 147 148 // Hardcoded logic to detect Acrobat plugins locations. 149 void GetAcrobatDirectory(std::set<base::FilePath>* plugin_dirs) { 150 base::FilePath path; 151 if (!GetInstalledPath(kRegistryAcrobatReader, &path) && 152 !GetInstalledPath(kRegistryAcrobat, &path)) { 153 return; 154 } 155 156 plugin_dirs->insert(path.Append(L"Browser")); 157 } 158 159 // Hardcoded logic to detect QuickTime plugin location. 160 void GetQuicktimeDirectory(std::set<base::FilePath>* plugin_dirs) { 161 base::FilePath path; 162 if (GetInstalledPath(kRegistryQuickTime, &path)) 163 plugin_dirs->insert(AppendPluginsDir(path)); 164 } 165 166 // Hardcoded logic to detect Windows Media Player plugin location. 167 void GetWindowsMediaDirectory(std::set<base::FilePath>* plugin_dirs) { 168 base::FilePath path; 169 if (GetInstalledPath(kRegistryWindowsMedia, &path)) 170 plugin_dirs->insert(path); 171 } 172 173 // Hardcoded logic to detect Java plugin location. 174 void GetJavaDirectory(std::set<base::FilePath>* plugin_dirs) { 175 // Load the new NPAPI Java plugin 176 // 1. Open the main JRE key under HKLM 177 base::win::RegKey java_key(HKEY_LOCAL_MACHINE, kRegistryJava, 178 KEY_QUERY_VALUE); 179 180 // 2. Read the current Java version 181 base::string16 java_version; 182 if (java_key.ReadValue(kRegistryBrowserJavaVersion, &java_version) != 183 ERROR_SUCCESS) { 184 java_key.ReadValue(kRegistryCurrentJavaVersion, &java_version); 185 } 186 187 if (!java_version.empty()) { 188 java_key.OpenKey(java_version.c_str(), KEY_QUERY_VALUE); 189 190 // 3. Install path of the JRE binaries is specified in "JavaHome" 191 // value under the Java version key. 192 base::string16 java_plugin_directory; 193 if (java_key.ReadValue(kRegistryJavaHome, &java_plugin_directory) == 194 ERROR_SUCCESS) { 195 // 4. The new plugin resides under the 'bin/new_plugin' 196 // subdirectory. 197 DCHECK(!java_plugin_directory.empty()); 198 java_plugin_directory.append(L"\\bin\\new_plugin"); 199 200 // 5. We don't know the exact name of the DLL but it's in the form 201 // NP*.dll so just invoke LoadPlugins on this path. 202 plugin_dirs->insert(base::FilePath(java_plugin_directory)); 203 } 204 } 205 } 206 207 bool IsValid32BitImage(const base::FilePath& path) { 208 base::MemoryMappedFile plugin_image; 209 210 if (!plugin_image.InitializeAsImageSection(path)) 211 return false; 212 213 base::win::PEImage image(plugin_image.data()); 214 215 PIMAGE_NT_HEADERS nt_headers = image.GetNTHeaders(); 216 return (nt_headers->FileHeader.Machine == IMAGE_FILE_MACHINE_I386); 217 } 218 219 // Returns true if the given plugins share at least one mime type. This is used 220 // to differentiate newer versions of a plugin vs two plugins which happen to 221 // have the same filename. 222 bool HaveSharedMimeType(const WebPluginInfo& plugin1, 223 const WebPluginInfo& plugin2) { 224 for (size_t i = 0; i < plugin1.mime_types.size(); ++i) { 225 for (size_t j = 0; j < plugin2.mime_types.size(); ++j) { 226 if (plugin1.mime_types[i].mime_type == plugin2.mime_types[j].mime_type) 227 return true; 228 } 229 } 230 231 return false; 232 } 233 234 // Compares Windows style version strings (i.e. 1,2,3,4). Returns true if b's 235 // version is newer than a's, or false if it's equal or older. 236 bool IsNewerVersion(const base::string16& a, const base::string16& b) { 237 std::vector<base::string16> a_ver, b_ver; 238 base::SplitString(a, ',', &a_ver); 239 base::SplitString(b, ',', &b_ver); 240 if (a_ver.size() == 1 && b_ver.size() == 1) { 241 base::SplitString(a, '.', &a_ver); 242 base::SplitString(b, '.', &b_ver); 243 } 244 if (a_ver.size() != b_ver.size()) 245 return false; 246 for (size_t i = 0; i < a_ver.size(); i++) { 247 int cur_a, cur_b; 248 base::StringToInt(a_ver[i], &cur_a); 249 base::StringToInt(b_ver[i], &cur_b); 250 251 if (cur_a > cur_b) 252 return false; 253 if (cur_a < cur_b) 254 return true; 255 } 256 return false; 257 } 258 259 } // namespace 260 261 bool PluginList::ReadWebPluginInfo(const base::FilePath& filename, 262 WebPluginInfo* info) { 263 // On windows, the way we get the mime types for the library is 264 // to check the version information in the DLL itself. This 265 // will be a string of the format: <type1>|<type2>|<type3>|... 266 // For example: 267 // video/quicktime|audio/aiff|image/jpeg 268 scoped_ptr<FileVersionInfo> version_info( 269 FileVersionInfo::CreateFileVersionInfo(filename)); 270 if (!version_info) { 271 LOG_IF(ERROR, PluginList::DebugPluginLoading()) 272 << "Could not get version info for plugin " 273 << filename.value(); 274 return false; 275 } 276 277 FileVersionInfoWin* version_info_win = 278 static_cast<FileVersionInfoWin*>(version_info.get()); 279 280 info->name = version_info->product_name(); 281 info->desc = version_info->file_description(); 282 info->version = version_info->file_version(); 283 info->path = filename; 284 285 // TODO(evan): Move the ParseMimeTypes code inline once Pepper is updated. 286 if (!PluginList::ParseMimeTypes( 287 UTF16ToASCII(version_info_win->GetStringValue(L"MIMEType")), 288 UTF16ToASCII(version_info_win->GetStringValue(L"FileExtents")), 289 version_info_win->GetStringValue(L"FileOpenName"), 290 &info->mime_types)) { 291 LOG_IF(ERROR, PluginList::DebugPluginLoading()) 292 << "Plugin " << info->name << " has bad MIME types, skipping"; 293 return false; 294 } 295 296 return true; 297 } 298 299 void PluginList::GetPluginDirectories( 300 std::vector<base::FilePath>* plugin_dirs) { 301 if (PluginList::plugins_discovery_disabled_) 302 return; 303 304 // We use a set for uniqueness, which we require, over order, which we do not. 305 std::set<base::FilePath> dirs; 306 307 // Load from the application-specific area 308 GetAppDirectory(&dirs); 309 310 // Load from the executable area 311 GetExeDirectory(&dirs); 312 313 // Load Java 314 GetJavaDirectory(&dirs); 315 316 // Load firefox plugins too. This is mainly to try to locate 317 // a pre-installed Flash player. 318 GetFirefoxDirectory(&dirs); 319 320 // Firefox hard-codes the paths of some popular plugins to ensure that 321 // the plugins are found. We are going to copy this as well. 322 GetAcrobatDirectory(&dirs); 323 GetQuicktimeDirectory(&dirs); 324 GetWindowsMediaDirectory(&dirs); 325 326 for (std::set<base::FilePath>::iterator i = dirs.begin(); i != dirs.end(); ++i) 327 plugin_dirs->push_back(*i); 328 } 329 330 void PluginList::GetPluginsInDir( 331 const base::FilePath& path, std::vector<base::FilePath>* plugins) { 332 WIN32_FIND_DATA find_file_data; 333 HANDLE find_handle; 334 335 base::string16 dir = path.value(); 336 // FindFirstFile requires that you specify a wildcard for directories. 337 dir.append(L"\\NP*.DLL"); 338 339 find_handle = FindFirstFile(dir.c_str(), &find_file_data); 340 if (find_handle == INVALID_HANDLE_VALUE) 341 return; 342 343 do { 344 if (!(find_file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) { 345 base::FilePath filename = path.Append(find_file_data.cFileName); 346 plugins->push_back(filename); 347 } 348 } while (FindNextFile(find_handle, &find_file_data) != 0); 349 350 DCHECK(GetLastError() == ERROR_NO_MORE_FILES); 351 FindClose(find_handle); 352 } 353 354 void PluginList::GetPluginPathsFromRegistry( 355 std::vector<base::FilePath>* plugins) { 356 if (PluginList::plugins_discovery_disabled_) 357 return; 358 359 std::set<base::FilePath> plugin_dirs; 360 361 GetPluginsInRegistryDirectory( 362 HKEY_CURRENT_USER, kRegistryMozillaPlugins, &plugin_dirs); 363 GetPluginsInRegistryDirectory( 364 HKEY_LOCAL_MACHINE, kRegistryMozillaPlugins, &plugin_dirs); 365 366 for (std::set<base::FilePath>::iterator i = plugin_dirs.begin(); 367 i != plugin_dirs.end(); ++i) { 368 plugins->push_back(*i); 369 } 370 } 371 372 bool PluginList::ShouldLoadPluginUsingPluginList( 373 const WebPluginInfo& info, 374 std::vector<WebPluginInfo>* plugins) { 375 bool should_check_version = true; 376 { 377 base::AutoLock lock(lock_); 378 should_check_version = 379 std::find(extra_plugin_paths_.begin(), extra_plugin_paths_.end(), 380 info.path) == extra_plugin_paths_.end(); 381 } 382 // Version check for plugins that are not coming from |extra_plugin_paths_|. 383 if (should_check_version) { 384 for (size_t j = 0; j < plugins->size(); ++j) { 385 base::FilePath::StringType plugin1 = 386 StringToLowerASCII((*plugins)[j].path.BaseName().value()); 387 base::FilePath::StringType plugin2 = 388 StringToLowerASCII(info.path.BaseName().value()); 389 if ((plugin1 == plugin2 && HaveSharedMimeType((*plugins)[j], info)) || 390 (plugin1 == kJavaDeploy1 && plugin2 == kJavaDeploy2) || 391 (plugin1 == kJavaDeploy2 && plugin2 == kJavaDeploy1)) { 392 if (IsNewerVersion(info.version, (*plugins)[j].version)) 393 return false; // We have loaded a plugin whose version is newer. 394 plugins->erase(plugins->begin() + j); 395 break; 396 } 397 } 398 } 399 400 // The checks below only apply to NPAPI plugins. 401 if (info.type != WebPluginInfo::PLUGIN_TYPE_NPAPI) 402 return true; 403 404 { 405 base::AutoLock lock(lock_); 406 // If the plugin is in our internal list we should load it. 407 for (size_t i = 0; i < internal_plugins_.size(); ++i) { 408 if (info.path == internal_plugins_[i].path) 409 return true; 410 } 411 } 412 413 // Troublemakers. 414 base::FilePath::StringType filename = 415 StringToLowerASCII(info.path.BaseName().value()); 416 // Depends on XPCOM. 417 if (filename == kMozillaActiveXPlugin) 418 return false; 419 420 // Disable the Yahoo Application State plugin as it crashes the plugin 421 // process on return from NPObjectStub::OnInvoke. Please refer to 422 // http://b/issue?id=1372124 for more information. 423 if (filename == kYahooApplicationStatePlugin) 424 return false; 425 426 // Disable the WangWang protocol handler plugin (npww.dll) as it crashes 427 // chrome during shutdown. Firefox also disables this plugin. 428 // Please refer to http://code.google.com/p/chromium/issues/detail?id=3953 429 // for more information. 430 if (filename == kWanWangProtocolHandlerPlugin) 431 return false; 432 433 // We only work with newer versions of the Java plugin which use NPAPI only 434 // and don't depend on XPCOM. 435 if (filename == kJavaPlugin1 || filename == kJavaPlugin2) { 436 std::vector<base::FilePath::StringType> ver; 437 base::SplitString(info.version, '.', &ver); 438 int major, minor, update; 439 if (ver.size() == 4 && 440 base::StringToInt(ver[0], &major) && 441 base::StringToInt(ver[1], &minor) && 442 base::StringToInt(ver[2], &update)) { 443 if (major == 6 && minor == 0 && update < 120) 444 return false; // Java SE6 Update 11 or older. 445 } 446 } 447 448 // Special WMP handling: 449 // If both the new and old WMP plugins exist, only load the new one. 450 if (filename == kNewWMPPlugin) { 451 for (size_t j = 0; j < plugins->size(); ++j) { 452 if ((*plugins)[j].path.BaseName().value() == kOldWMPPlugin) { 453 plugins->erase(plugins->begin() + j); 454 break; 455 } 456 } 457 458 } else if (filename == kOldWMPPlugin) { 459 for (size_t j = 0; j < plugins->size(); ++j) { 460 if ((*plugins)[j].path.BaseName().value() == kNewWMPPlugin) 461 return false; 462 } 463 } 464 465 #if !defined(ARCH_CPU_X86_64) 466 // The plugin in question could be a 64 bit plugin which we cannot load. 467 base::FilePath plugin_path(info.path); 468 if (!IsValid32BitImage(base::MakeAbsoluteFilePath(plugin_path))) 469 return false; 470 #endif 471 return true; 472 } 473 474 } // namespace content 475
