| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/component_updater/pepper_flash_component_installer.h" |
| |
| #include <stddef.h> |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/base_paths.h" |
| #include "base/bind.h" |
| #include "base/command_line.h" |
| #include "base/files/file_enumerator.h" |
| #include "base/files/file_path.h" |
| #include "base/files/file_util.h" |
| #include "base/json/json_reader.h" |
| #include "base/logging.h" |
| #include "base/path_service.h" |
| #include "base/stl_util.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/version.h" |
| #include "build/build_config.h" |
| #include "chrome/browser/plugins/plugin_prefs.h" |
| #include "chrome/common/chrome_constants.h" |
| #include "chrome/common/chrome_paths.h" |
| #include "chrome/common/chrome_switches.h" |
| #include "chrome/common/pepper_flash.h" |
| #include "chrome/common/ppapi_utils.h" |
| #include "components/component_updater/component_updater_service.h" |
| #include "components/update_client/update_client.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "content/public/browser/plugin_service.h" |
| #include "content/public/common/content_constants.h" |
| #include "content/public/common/pepper_plugin_info.h" |
| #include "flapper_version.h" // In SHARED_INTERMEDIATE_DIR. NOLINT |
| #include "ppapi/shared_impl/ppapi_permissions.h" |
| |
| #if defined(OS_LINUX) |
| #include "chrome/common/component_flash_hint_file_linux.h" |
| #endif // defined(OS_LINUX) |
| |
| using content::BrowserThread; |
| using content::PluginService; |
| |
| namespace component_updater { |
| |
| namespace { |
| |
| #if defined(GOOGLE_CHROME_BUILD) |
| // CRX hash. The extension id is: mimojjlkmoijpicakmndhoigimigcmbb. |
| const uint8_t kSha2Hash[] = {0xc8, 0xce, 0x99, 0xba, 0xce, 0x89, 0xf8, 0x20, |
| 0xac, 0xd3, 0x7e, 0x86, 0x8c, 0x86, 0x2c, 0x11, |
| 0xb9, 0x40, 0xc5, 0x55, 0xaf, 0x08, 0x63, 0x70, |
| 0x54, 0xf9, 0x56, 0xd3, 0xe7, 0x88, 0xba, 0x8c}; |
| |
| // If we don't have a Pepper Flash component, this is the version we claim. |
| const char kNullVersion[] = "0.0.0.0"; |
| |
| // Pepper Flash plugins have the version encoded in the path itself |
| // so we need to enumerate the directories to find the full path. |
| // On success, |latest_dir| returns something like: |
| // <profile>\AppData\Local\Google\Chrome\User Data\PepperFlash\10.3.44.555\. |
| // |latest_version| returns the corresponding version number. |older_dirs| |
| // returns directories of all older versions. |
| bool GetPepperFlashDirectory(base::FilePath* latest_dir, |
| Version* latest_version, |
| std::vector<base::FilePath>* older_dirs) { |
| DCHECK_CURRENTLY_ON(BrowserThread::FILE); |
| base::FilePath base_dir; |
| if (!PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN, |
| &base_dir)) { |
| return false; |
| } |
| |
| bool found = false; |
| base::FileEnumerator file_enumerator( |
| base_dir, false, base::FileEnumerator::DIRECTORIES); |
| for (base::FilePath path = file_enumerator.Next(); !path.value().empty(); |
| path = file_enumerator.Next()) { |
| Version version(path.BaseName().MaybeAsASCII()); |
| if (!version.IsValid()) |
| continue; |
| if (found) { |
| if (version.CompareTo(*latest_version) > 0) { |
| older_dirs->push_back(*latest_dir); |
| *latest_dir = path; |
| *latest_version = version; |
| } else { |
| older_dirs->push_back(path); |
| } |
| } else { |
| *latest_dir = path; |
| *latest_version = version; |
| found = true; |
| } |
| } |
| return found; |
| } |
| #endif // defined(GOOGLE_CHROME_BUILD) |
| |
| #if !defined(OS_LINUX) || defined(GOOGLE_CHROME_BUILD) |
| bool MakePepperFlashPluginInfo(const base::FilePath& flash_path, |
| const Version& flash_version, |
| bool out_of_process, |
| content::PepperPluginInfo* plugin_info) { |
| if (!flash_version.IsValid()) |
| return false; |
| const std::vector<uint32_t> ver_nums = flash_version.components(); |
| if (ver_nums.size() < 3) |
| return false; |
| |
| plugin_info->is_internal = false; |
| plugin_info->is_out_of_process = out_of_process; |
| plugin_info->path = flash_path; |
| plugin_info->name = content::kFlashPluginName; |
| plugin_info->permissions = chrome::kPepperFlashPermissions; |
| |
| // The description is like "Shockwave Flash 10.2 r154". |
| plugin_info->description = base::StringPrintf("%s %d.%d r%d", |
| content::kFlashPluginName, |
| ver_nums[0], |
| ver_nums[1], |
| ver_nums[2]); |
| |
| plugin_info->version = flash_version.GetString(); |
| |
| content::WebPluginMimeType swf_mime_type(content::kFlashPluginSwfMimeType, |
| content::kFlashPluginSwfExtension, |
| content::kFlashPluginName); |
| plugin_info->mime_types.push_back(swf_mime_type); |
| content::WebPluginMimeType spl_mime_type(content::kFlashPluginSplMimeType, |
| content::kFlashPluginSplExtension, |
| content::kFlashPluginName); |
| plugin_info->mime_types.push_back(spl_mime_type); |
| return true; |
| } |
| |
| bool IsPepperFlash(const content::WebPluginInfo& plugin) { |
| // We try to recognize Pepper Flash by the following criteria: |
| // * It is a Pepper plugin. |
| // * It has the special Flash permissions. |
| return plugin.is_pepper_plugin() && |
| (plugin.pepper_permissions & ppapi::PERMISSION_FLASH); |
| } |
| |
| void RegisterPepperFlashWithChrome(const base::FilePath& path, |
| const Version& version) { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| content::PepperPluginInfo plugin_info; |
| if (!MakePepperFlashPluginInfo(path, version, true, &plugin_info)) |
| return; |
| |
| base::FilePath bundled_flash_dir; |
| PathService::Get(chrome::DIR_PEPPER_FLASH_PLUGIN, &bundled_flash_dir); |
| base::FilePath system_flash_path; |
| PathService::Get(chrome::FILE_PEPPER_FLASH_SYSTEM_PLUGIN, &system_flash_path); |
| |
| std::vector<content::WebPluginInfo> plugins; |
| PluginService::GetInstance()->GetInternalPlugins(&plugins); |
| for (const auto& plugin : plugins) { |
| if (!IsPepperFlash(plugin)) |
| continue; |
| |
| Version registered_version(base::UTF16ToUTF8(plugin.version)); |
| |
| // If lower version, never register. |
| if (registered_version.IsValid() && |
| version.CompareTo(registered_version) < 0) { |
| return; |
| } |
| |
| bool registered_is_bundled = |
| !bundled_flash_dir.empty() && bundled_flash_dir.IsParent(plugin.path); |
| bool registered_is_debug_system = |
| !system_flash_path.empty() && |
| base::FilePath::CompareEqualIgnoreCase(plugin.path.value(), |
| system_flash_path.value()) && |
| chrome::IsSystemFlashScriptDebuggerPresent(); |
| bool is_on_network = false; |
| #if defined(OS_WIN) |
| // On Windows, component updated DLLs can't load off network drives. |
| // See crbug.com/572131 for details. |
| is_on_network = base::IsOnNetworkDrive(path); |
| #endif |
| // If equal version, register iff component is not on a network drive, |
| // and the version of flash is not bundled, and not debug system. |
| if (registered_version.IsValid() && |
| version.CompareTo(registered_version) == 0 && |
| (is_on_network || registered_is_bundled || |
| registered_is_debug_system)) { |
| return; |
| } |
| |
| // If the version is newer, remove the old one first. |
| PluginService::GetInstance()->UnregisterInternalPlugin(plugin.path); |
| break; |
| } |
| |
| PluginService::GetInstance()->RegisterInternalPlugin( |
| plugin_info.ToWebPluginInfo(), true); |
| PluginService::GetInstance()->RefreshPlugins(); |
| } |
| #endif // !defined(OS_LINUX) || defined(GOOGLE_CHROME_BUILD) |
| |
| } // namespace |
| |
| class PepperFlashComponentInstaller : public update_client::CrxInstaller { |
| public: |
| explicit PepperFlashComponentInstaller(const Version& version); |
| |
| // ComponentInstaller implementation: |
| void OnUpdateError(int error) override; |
| |
| bool Install(const base::DictionaryValue& manifest, |
| const base::FilePath& unpack_path) override; |
| |
| bool GetInstalledFile(const std::string& file, |
| base::FilePath* installed_file) override; |
| |
| bool Uninstall() override; |
| |
| private: |
| ~PepperFlashComponentInstaller() override {} |
| |
| Version current_version_; |
| }; |
| |
| PepperFlashComponentInstaller::PepperFlashComponentInstaller( |
| const Version& version) |
| : current_version_(version) { |
| DCHECK(version.IsValid()); |
| } |
| |
| void PepperFlashComponentInstaller::OnUpdateError(int error) { |
| NOTREACHED() << "Pepper Flash update error: " << error; |
| } |
| |
| bool PepperFlashComponentInstaller::Install( |
| const base::DictionaryValue& manifest, |
| const base::FilePath& unpack_path) { |
| Version version; |
| if (!chrome::CheckPepperFlashManifest(manifest, &version)) |
| return false; |
| if (current_version_.CompareTo(version) > 0) |
| return false; |
| const base::FilePath unpacked_plugin = |
| unpack_path.Append(chrome::kPepperFlashPluginFilename); |
| if (!base::PathExists(unpacked_plugin)) |
| return false; |
| // Passed the basic tests. Time to install it. |
| base::FilePath path; |
| if (!PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN, |
| &path)) { |
| return false; |
| } |
| path = path.AppendASCII(version.GetString()); |
| if (base::PathExists(path)) |
| return false; |
| current_version_ = version; |
| |
| if (!base::Move(unpack_path, path)) |
| return false; |
| #if defined(OS_LINUX) |
| const base::FilePath flash_path = |
| path.Append(chrome::kPepperFlashPluginFilename); |
| // Populate the component updated flash hint file so that the zygote can |
| // locate and preload the latest version of flash. |
| if (!component_flash_hint_file::RecordFlashUpdate(flash_path, flash_path, |
| version.GetString())) { |
| if (!base::DeleteFile(path, true)) |
| LOG(ERROR) << "Hint file creation failed, but unable to delete " |
| "installed flash plugin."; |
| return false; |
| } |
| #else |
| // Installation is done. Now tell the rest of chrome. Both the path service |
| // and to the plugin service. On Linux, a restart is required to use the new |
| // Flash version, so we do not do this. |
| PathService::Override(chrome::DIR_PEPPER_FLASH_PLUGIN, path); |
| path = path.Append(chrome::kPepperFlashPluginFilename); |
| BrowserThread::PostTask( |
| BrowserThread::UI, |
| FROM_HERE, |
| base::Bind(&RegisterPepperFlashWithChrome, path, version)); |
| #endif // !defined(OS_LINUX) |
| return true; |
| } |
| |
| bool PepperFlashComponentInstaller::GetInstalledFile( |
| const std::string& file, |
| base::FilePath* installed_file) { |
| return false; |
| } |
| |
| bool PepperFlashComponentInstaller::Uninstall() { |
| return false; |
| } |
| |
| |
| |
| namespace { |
| |
| #if defined(GOOGLE_CHROME_BUILD) |
| void FinishPepperFlashUpdateRegistration(ComponentUpdateService* cus, |
| const Version& version) { |
| DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| update_client::CrxComponent pepflash; |
| pepflash.name = "pepper_flash"; |
| pepflash.installer = new PepperFlashComponentInstaller(version); |
| pepflash.version = version; |
| pepflash.pk_hash.assign(kSha2Hash, &kSha2Hash[sizeof(kSha2Hash)]); |
| if (!cus->RegisterComponent(pepflash)) |
| NOTREACHED() << "Pepper Flash component registration failed."; |
| } |
| |
| bool ValidatePepperFlashManifest(const base::FilePath& path) { |
| base::FilePath manifest_path(path.DirName().AppendASCII("manifest.json")); |
| |
| std::string manifest_data; |
| if (!base::ReadFileToString(manifest_path, &manifest_data)) |
| return false; |
| std::unique_ptr<base::Value> manifest_value( |
| base::JSONReader::Read(manifest_data, base::JSON_ALLOW_TRAILING_COMMAS)); |
| if (!manifest_value.get()) |
| return false; |
| base::DictionaryValue* manifest = NULL; |
| if (!manifest_value->GetAsDictionary(&manifest)) |
| return false; |
| Version version; |
| if (!chrome::CheckPepperFlashManifest(*manifest, &version)) |
| return false; |
| return true; |
| } |
| |
| void StartPepperFlashUpdateRegistration(ComponentUpdateService* cus) { |
| DCHECK_CURRENTLY_ON(BrowserThread::FILE); |
| base::FilePath path; |
| if (!PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN, |
| &path)) { |
| return; |
| } |
| |
| if (!base::PathExists(path)) { |
| if (!base::CreateDirectory(path)) { |
| NOTREACHED() << "Could not create Pepper Flash directory."; |
| return; |
| } |
| } |
| |
| Version version(kNullVersion); |
| std::vector<base::FilePath> older_dirs; |
| if (GetPepperFlashDirectory(&path, &version, &older_dirs)) { |
| path = path.Append(chrome::kPepperFlashPluginFilename); |
| if (base::PathExists(path)) { |
| // Only register component pepper flash if it validates manifest check. |
| if (ValidatePepperFlashManifest(path)) { |
| BrowserThread::PostTask( |
| BrowserThread::UI, |
| FROM_HERE, |
| base::Bind(&RegisterPepperFlashWithChrome, path, version)); |
| } else { |
| // Queue this version to be deleted. |
| older_dirs.push_back(path.DirName()); |
| version = Version(kNullVersion); |
| } |
| } else { |
| version = Version(kNullVersion); |
| } |
| } |
| |
| #if defined(FLAPPER_AVAILABLE) |
| // If a version of Flash is bundled with Chrome, and it's a higher version |
| // than the version of the component, or the component has never been updated, |
| // then set the bundled version as the current version. |
| if (version.CompareTo(Version(FLAPPER_VERSION_STRING)) < 0) |
| version = Version(FLAPPER_VERSION_STRING); |
| #endif |
| |
| BrowserThread::PostTask( |
| BrowserThread::UI, |
| FROM_HERE, |
| base::Bind(&FinishPepperFlashUpdateRegistration, cus, version)); |
| |
| // Remove older versions of Pepper Flash. |
| for (std::vector<base::FilePath>::iterator iter = older_dirs.begin(); |
| iter != older_dirs.end(); |
| ++iter) { |
| base::DeleteFile(*iter, true); |
| } |
| } |
| #endif // defined(GOOGLE_CHROME_BUILD) |
| |
| } // namespace |
| |
| void RegisterPepperFlashComponent(ComponentUpdateService* cus) { |
| #if defined(GOOGLE_CHROME_BUILD) |
| // Component updated flash supersedes bundled flash therefore if that one |
| // is disabled then this one should never install. |
| base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess(); |
| if (cmd_line->HasSwitch(switches::kDisableBundledPpapiFlash)) |
| return; |
| BrowserThread::PostTask(BrowserThread::FILE, |
| FROM_HERE, |
| base::Bind(&StartPepperFlashUpdateRegistration, cus)); |
| #endif // defined(GOOGLE_CHROME_BUILD) |
| } |
| |
| } // namespace component_updater |
