chrome/browser/component_updater/pepper_flash_component_installer.cc

   1 // Copyright (c) 2013 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 <stdint.h>
   6 #include <string.h>
   7 #include <vector>
   8
   9 #include "base/base_paths.h"
  10 #include "base/bind.h"
  11 #include "base/command_line.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/files/file_enumerator.h"
  14 #include "base/files/file_path.h"
  15 #include "base/files/file_util.h"
  16 #include "base/logging.h"
  17 #include "base/path_service.h"
  18 #include "base/stl_util.h"
  19 #include "base/strings/string_util.h"
  20 #include "base/strings/stringprintf.h"
  21 #include "base/strings/utf_string_conversions.h"
  22 #include "base/version.h"
  23 #include "build/build_config.h"
  24 #include "chrome/browser/component_updater/flash_component_installer.h"
  25 #include "chrome/browser/plugins/plugin_prefs.h"
  26 #include "chrome/common/chrome_constants.h"
  27 #include "chrome/common/chrome_paths.h"
  28 #include "chrome/common/chrome_switches.h"
  29 #include "chrome/common/pepper_flash.h"
  30 #include "chrome/common/ppapi_utils.h"
  31 #include "components/component_updater/component_updater_service.h"
  32 #include "components/update_client/update_client.h"
  33 #include "content/public/browser/browser_thread.h"
  34 #include "content/public/browser/plugin_service.h"
  35 #include "content/public/common/content_constants.h"
  36 #include "content/public/common/pepper_plugin_info.h"
  37 #include "flapper_version.h"  // In SHARED_INTERMEDIATE_DIR.  NOLINT
  38 #include "ppapi/shared_impl/ppapi_permissions.h"
  39
  40 #if defined(OS_LINUX)
  41 #include "chrome/common/component_flash_hint_file_linux.h"
  42 #endif  // defined(OS_LINUX)
  43
  44 using content::BrowserThread;
  45 using content::PluginService;
  46
  47 namespace component_updater {
  48
  49 namespace {
  50
  51 #if defined(GOOGLE_CHROME_BUILD)
  52 // CRX hash. The extension id is: mimojjlkmoijpicakmndhoigimigcmbb.
  53 const uint8_t kSha2Hash[] = {0xc8, 0xce, 0x99, 0xba, 0xce, 0x89, 0xf8, 0x20,
  54                              0xac, 0xd3, 0x7e, 0x86, 0x8c, 0x86, 0x2c, 0x11,
  55                              0xb9, 0x40, 0xc5, 0x55, 0xaf, 0x08, 0x63, 0x70,
  56                              0x54, 0xf9, 0x56, 0xd3, 0xe7, 0x88, 0xba, 0x8c};
  57
  58 // If we don't have a Pepper Flash component, this is the version we claim.
  59 const char kNullVersion[] = "0.0.0.0";
  60
  61 // Pepper Flash plugins have the version encoded in the path itself
  62 // so we need to enumerate the directories to find the full path.
  63 // On success, |latest_dir| returns something like:
  64 // <profile>\AppData\Local\Google\Chrome\User Data\PepperFlash\10.3.44.555\.
  65 // |latest_version| returns the corresponding version number. |older_dirs|
  66 // returns directories of all older versions.
  67 bool GetPepperFlashDirectory(base::FilePath* latest_dir,
  68                              Version* latest_version,
  69                              std::vector<base::FilePath>* older_dirs) {
  70   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
  71   base::FilePath base_dir;
  72   if (!PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN,
  73                         &base_dir)) {
  74     return false;
  75   }
  76
  77   bool found = false;
  78   base::FileEnumerator file_enumerator(
  79       base_dir, false, base::FileEnumerator::DIRECTORIES);
  80   for (base::FilePath path = file_enumerator.Next(); !path.value().empty();
  81        path = file_enumerator.Next()) {
  82     Version version(path.BaseName().MaybeAsASCII());
  83     if (!version.IsValid())
  84       continue;
  85     if (found) {
  86       if (version.CompareTo(*latest_version) > 0) {
  87         older_dirs->push_back(*latest_dir);
  88         *latest_dir = path;
  89         *latest_version = version;
  90       } else {
  91         older_dirs->push_back(path);
  92       }
  93     } else {
  94       *latest_dir = path;
  95       *latest_version = version;
  96       found = true;
  97     }
  98   }
  99   return found;
 100 }
 101 #endif  // defined(GOOGLE_CHROME_BUILD)
 102
 103 #if !defined(OS_LINUX) || defined(GOOGLE_CHROME_BUILD)
 104 bool MakePepperFlashPluginInfo(const base::FilePath& flash_path,
 105                                const Version& flash_version,
 106                                bool out_of_process,
 107                                content::PepperPluginInfo* plugin_info) {
 108   if (!flash_version.IsValid())
 109     return false;
 110   const std::vector<uint32_t> ver_nums = flash_version.components();
 111   if (ver_nums.size() < 3)
 112     return false;
 113
 114   plugin_info->is_internal = false;
 115   plugin_info->is_out_of_process = out_of_process;
 116   plugin_info->path = flash_path;
 117   plugin_info->name = content::kFlashPluginName;
 118   plugin_info->permissions = chrome::kPepperFlashPermissions;
 119
 120   // The description is like "Shockwave Flash 10.2 r154".
 121   plugin_info->description = base::StringPrintf("%s %d.%d r%d",
 122                                                 content::kFlashPluginName,
 123                                                 ver_nums[0],
 124                                                 ver_nums[1],
 125                                                 ver_nums[2]);
 126
 127   plugin_info->version = flash_version.GetString();
 128
 129   content::WebPluginMimeType swf_mime_type(content::kFlashPluginSwfMimeType,
 130                                            content::kFlashPluginSwfExtension,
 131                                            content::kFlashPluginName);
 132   plugin_info->mime_types.push_back(swf_mime_type);
 133   content::WebPluginMimeType spl_mime_type(content::kFlashPluginSplMimeType,
 134                                            content::kFlashPluginSplExtension,
 135                                            content::kFlashPluginName);
 136   plugin_info->mime_types.push_back(spl_mime_type);
 137   return true;
 138 }
 139
 140 bool IsPepperFlash(const content::WebPluginInfo& plugin) {
 141   // We try to recognize Pepper Flash by the following criteria:
 142   // * It is a Pepper plugin.
 143   // * It has the special Flash permissions.
 144   return plugin.is_pepper_plugin() &&
 145          (plugin.pepper_permissions & ppapi::PERMISSION_FLASH);
 146 }
 147
 148 void RegisterPepperFlashWithChrome(const base::FilePath& path,
 149                                    const Version& version) {
 150   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 151   content::PepperPluginInfo plugin_info;
 152   if (!MakePepperFlashPluginInfo(path, version, true, &plugin_info))
 153     return;
 154
 155   std::vector<content::WebPluginInfo> plugins;
 156   PluginService::GetInstance()->GetInternalPlugins(&plugins);
 157   for (std::vector<content::WebPluginInfo>::const_iterator it =
 158             plugins.begin();
 159         it != plugins.end();
 160         ++it) {
 161     if (!IsPepperFlash(*it))
 162       continue;
 163
 164     // Do it only if the version we're trying to register is newer.
 165     Version registered_version(base::UTF16ToUTF8(it->version));
 166     if (registered_version.IsValid() &&
 167         version.CompareTo(registered_version) <= 0) {
 168       return;
 169     }
 170
 171     // If the version is newer, remove the old one first.
 172     PluginService::GetInstance()->UnregisterInternalPlugin(it->path);
 173     break;
 174   }
 175
 176   PluginService::GetInstance()->RegisterInternalPlugin(
 177       plugin_info.ToWebPluginInfo(), true);
 178   PluginService::GetInstance()->RefreshPlugins();
 179 }
 180 #endif  // !defined(OS_LINUX) || defined(GOOGLE_CHROME_BUILD)
 181
 182 }  // namespace
 183
 184 class PepperFlashComponentInstaller : public update_client::CrxInstaller {
 185  public:
 186   explicit PepperFlashComponentInstaller(const Version& version);
 187
 188   // ComponentInstaller implementation:
 189   void OnUpdateError(int error) override;
 190
 191   bool Install(const base::DictionaryValue& manifest,
 192                const base::FilePath& unpack_path) override;
 193
 194   bool GetInstalledFile(const std::string& file,
 195                         base::FilePath* installed_file) override;
 196
 197   bool Uninstall() override;
 198
 199  private:
 200   ~PepperFlashComponentInstaller() override {}
 201
 202   Version current_version_;
 203 };
 204
 205 PepperFlashComponentInstaller::PepperFlashComponentInstaller(
 206     const Version& version)
 207     : current_version_(version) {
 208   DCHECK(version.IsValid());
 209 }
 210
 211 void PepperFlashComponentInstaller::OnUpdateError(int error) {
 212   NOTREACHED() << "Pepper Flash update error: " << error;
 213 }
 214
 215 bool PepperFlashComponentInstaller::Install(
 216     const base::DictionaryValue& manifest,
 217     const base::FilePath& unpack_path) {
 218   Version version;
 219   if (!chrome::CheckPepperFlashManifest(manifest, &version))
 220     return false;
 221   if (current_version_.CompareTo(version) > 0)
 222     return false;
 223   const base::FilePath unpacked_plugin =
 224       unpack_path.Append(chrome::kPepperFlashPluginFilename);
 225   if (!base::PathExists(unpacked_plugin))
 226     return false;
 227   // Passed the basic tests. Time to install it.
 228   base::FilePath path;
 229   if (!PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN,
 230                         &path)) {
 231     return false;
 232   }
 233   path = path.AppendASCII(version.GetString());
 234   if (base::PathExists(path))
 235     return false;
 236   current_version_ = version;
 237
 238   if (!base::Move(unpack_path, path))
 239     return false;
 240 #if defined(OS_LINUX)
 241   const base::FilePath flash_path =
 242       path.Append(chrome::kPepperFlashPluginFilename);
 243   // Populate the component updated flash hint file so that the zygote can
 244   // locate and preload the latest version of flash.
 245   if (!component_flash_hint_file::RecordFlashUpdate(flash_path, flash_path,
 246                                                     version.GetString())) {
 247     if (!base::DeleteFile(path, true))
 248       LOG(ERROR) << "Hint file creation failed, but unable to delete "
 249                     "installed flash plugin.";
 250     return false;
 251   }
 252 #else
 253   // Installation is done. Now tell the rest of chrome. Both the path service
 254   // and to the plugin service. On Linux, a restart is required to use the new
 255   // Flash version, so we do not do this.
 256   PathService::Override(chrome::DIR_PEPPER_FLASH_PLUGIN, path);
 257   path = path.Append(chrome::kPepperFlashPluginFilename);
 258   BrowserThread::PostTask(
 259       BrowserThread::UI,
 260       FROM_HERE,
 261       base::Bind(&RegisterPepperFlashWithChrome, path, version));
 262 #endif  // !defined(OS_LINUX)
 263   return true;
 264 }
 265
 266 bool PepperFlashComponentInstaller::GetInstalledFile(
 267     const std::string& file,
 268     base::FilePath* installed_file) {
 269   return false;
 270 }
 271
 272 bool PepperFlashComponentInstaller::Uninstall() {
 273   return false;
 274 }
 275
 276
 277
 278 namespace {
 279
 280 #if defined(GOOGLE_CHROME_BUILD)
 281 void FinishPepperFlashUpdateRegistration(ComponentUpdateService* cus,
 282                                          const Version& version) {
 283   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 284   update_client::CrxComponent pepflash;
 285   pepflash.name = "pepper_flash";
 286   pepflash.installer = new PepperFlashComponentInstaller(version);
 287   pepflash.version = version;
 288   pepflash.pk_hash.assign(kSha2Hash, &kSha2Hash[sizeof(kSha2Hash)]);
 289   if (!cus->RegisterComponent(pepflash))
 290     NOTREACHED() << "Pepper Flash component registration failed.";
 291 }
 292
 293 void StartPepperFlashUpdateRegistration(ComponentUpdateService* cus) {
 294   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 295   base::FilePath path;
 296   if (!PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN,
 297                         &path)) {
 298     return;
 299   }
 300
 301   if (!base::PathExists(path)) {
 302     if (!base::CreateDirectory(path)) {
 303       NOTREACHED() << "Could not create Pepper Flash directory.";
 304       return;
 305     }
 306   }
 307
 308   Version version(kNullVersion);
 309   std::vector<base::FilePath> older_dirs;
 310   if (GetPepperFlashDirectory(&path, &version, &older_dirs)) {
 311     path = path.Append(chrome::kPepperFlashPluginFilename);
 312     if (base::PathExists(path)) {
 313       BrowserThread::PostTask(
 314           BrowserThread::UI,
 315           FROM_HERE,
 316           base::Bind(&RegisterPepperFlashWithChrome, path, version));
 317     } else {
 318       version = Version(kNullVersion);
 319     }
 320   }
 321
 322 #if defined(FLAPPER_AVAILABLE)
 323   // If a version of Flash is bundled with Chrome, and it's a higher version
 324   // than the version of the component, or the component has never been updated,
 325   // then set the bundled version as the current version.
 326   if (version.CompareTo(Version(FLAPPER_VERSION_STRING)) < 0)
 327     version = Version(FLAPPER_VERSION_STRING);
 328 #endif
 329
 330   BrowserThread::PostTask(
 331       BrowserThread::UI,
 332       FROM_HERE,
 333       base::Bind(&FinishPepperFlashUpdateRegistration, cus, version));
 334
 335   // Remove older versions of Pepper Flash.
 336   for (std::vector<base::FilePath>::iterator iter = older_dirs.begin();
 337        iter != older_dirs.end();
 338        ++iter) {
 339     base::DeleteFile(*iter, true);
 340   }
 341 }
 342 #endif  // defined(GOOGLE_CHROME_BUILD)
 343
 344 }  // namespace
 345
 346 void RegisterPepperFlashComponent(ComponentUpdateService* cus) {
 347 #if defined(GOOGLE_CHROME_BUILD)
 348   // Component updated flash supersedes bundled flash therefore if that one
 349   // is disabled then this one should never install.
 350   base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
 351   if (cmd_line->HasSwitch(switches::kDisableBundledPpapiFlash))
 352     return;
 353   BrowserThread::PostTask(BrowserThread::FILE,
 354                           FROM_HERE,
 355                           base::Bind(&StartPepperFlashUpdateRegistration, cus));
 356 #endif  // defined(GOOGLE_CHROME_BUILD)
 357 }
 358
 359 }  // namespace component_updater