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/strings/string_util.h"
  19 #include "base/strings/stringprintf.h"
  20 #include "base/strings/utf_string_conversions.h"
  21 #include "base/version.h"
  22 #include "build/build_config.h"
  23 #include "chrome/browser/component_updater/flash_component_installer.h"
  24 #include "chrome/browser/plugins/plugin_prefs.h"
  25 #include "chrome/common/chrome_constants.h"
  26 #include "chrome/common/chrome_paths.h"
  27 #include "chrome/common/chrome_switches.h"
  28 #include "chrome/common/pepper_flash.h"
  29 #include "chrome/common/ppapi_utils.h"
  30 #include "components/component_updater/component_updater_service.h"
  31 #include "components/update_client/update_client.h"
  32 #include "content/public/browser/browser_thread.h"
  33 #include "content/public/browser/plugin_service.h"
  34 #include "content/public/common/content_constants.h"
  35 #include "content/public/common/pepper_plugin_info.h"
  36 #include "flapper_version.h"  // In SHARED_INTERMEDIATE_DIR.  NOLINT
  37 #include "ppapi/shared_impl/ppapi_permissions.h"
  38
  39 using content::BrowserThread;
  40 using content::PluginService;
  41
  42 namespace component_updater {
  43
  44 namespace {
  45
  46 #if defined(GOOGLE_CHROME_BUILD) && !defined(OS_LINUX)
  47 // CRX hash. The extension id is: mimojjlkmoijpicakmndhoigimigcmbb.
  48 const uint8_t kSha2Hash[] = {0xc8, 0xce, 0x99, 0xba, 0xce, 0x89, 0xf8, 0x20,
  49                              0xac, 0xd3, 0x7e, 0x86, 0x8c, 0x86, 0x2c, 0x11,
  50                              0xb9, 0x40, 0xc5, 0x55, 0xaf, 0x08, 0x63, 0x70,
  51                              0x54, 0xf9, 0x56, 0xd3, 0xe7, 0x88, 0xba, 0x8c};
  52
  53 // If we don't have a Pepper Flash component, this is the version we claim.
  54 const char kNullVersion[] = "0.0.0.0";
  55
  56 #endif  // defined(GOOGLE_CHROME_BUILD) && !defined(OS_LINUX)
  57
  58 // The base directory on Windows looks like:
  59 // <profile>\AppData\Local\Google\Chrome\User Data\PepperFlash\.
  60 base::FilePath GetPepperFlashBaseDirectory() {
  61   base::FilePath result;
  62   PathService::Get(chrome::DIR_COMPONENT_UPDATED_PEPPER_FLASH_PLUGIN, &result);
  63   return result;
  64 }
  65
  66 #if defined(GOOGLE_CHROME_BUILD) && !defined(OS_LINUX)
  67 // Pepper Flash plugins have the version encoded in the path itself
  68 // so we need to enumerate the directories to find the full path.
  69 // On success, |latest_dir| returns something like:
  70 // <profile>\AppData\Local\Google\Chrome\User Data\PepperFlash\10.3.44.555\.
  71 // |latest_version| returns the corresponding version number. |older_dirs|
  72 // returns directories of all older versions.
  73 bool GetPepperFlashDirectory(base::FilePath* latest_dir,
  74                              Version* latest_version,
  75                              std::vector<base::FilePath>* older_dirs) {
  76   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
  77   base::FilePath base_dir = GetPepperFlashBaseDirectory();
  78   bool found = false;
  79   base::FileEnumerator file_enumerator(
  80       base_dir, false, base::FileEnumerator::DIRECTORIES);
  81   for (base::FilePath path = file_enumerator.Next(); !path.value().empty();
  82        path = file_enumerator.Next()) {
  83     Version version(path.BaseName().MaybeAsASCII());
  84     if (!version.IsValid())
  85       continue;
  86     if (found) {
  87       if (version.CompareTo(*latest_version) > 0) {
  88         older_dirs->push_back(*latest_dir);
  89         *latest_dir = path;
  90         *latest_version = version;
  91       } else {
  92         older_dirs->push_back(path);
  93       }
  94     } else {
  95       *latest_dir = path;
  96       *latest_version = version;
  97       found = true;
  98     }
  99   }
 100   return found;
 101 }
 102 #endif  // defined(GOOGLE_CHROME_BUILD) && !defined(OS_LINUX)
 103
 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
 181 }  // namespace
 182
 183 class PepperFlashComponentInstaller : public update_client::CrxInstaller {
 184  public:
 185   explicit PepperFlashComponentInstaller(const Version& version);
 186
 187   // ComponentInstaller implementation:
 188   void OnUpdateError(int error) override;
 189
 190   bool Install(const base::DictionaryValue& manifest,
 191                const base::FilePath& unpack_path) override;
 192
 193   bool GetInstalledFile(const std::string& file,
 194                         base::FilePath* installed_file) override;
 195
 196   bool Uninstall() override;
 197
 198  private:
 199   ~PepperFlashComponentInstaller() override {}
 200
 201   Version current_version_;
 202 };
 203
 204 PepperFlashComponentInstaller::PepperFlashComponentInstaller(
 205     const Version& version)
 206     : current_version_(version) {
 207   DCHECK(version.IsValid());
 208 }
 209
 210 void PepperFlashComponentInstaller::OnUpdateError(int error) {
 211   NOTREACHED() << "Pepper Flash update error: " << error;
 212 }
 213
 214 bool PepperFlashComponentInstaller::Install(
 215     const base::DictionaryValue& manifest,
 216     const base::FilePath& unpack_path) {
 217   Version version;
 218   if (!chrome::CheckPepperFlashManifest(manifest, &version))
 219     return false;
 220   if (current_version_.CompareTo(version) > 0)
 221     return false;
 222   if (!base::PathExists(unpack_path.Append(chrome::kPepperFlashPluginFilename)))
 223     return false;
 224   // Passed the basic tests. Time to install it.
 225   base::FilePath path =
 226       GetPepperFlashBaseDirectory().AppendASCII(version.GetString());
 227   if (base::PathExists(path))
 228     return false;
 229   if (!base::Move(unpack_path, path))
 230     return false;
 231   // Installation is done. Now tell the rest of chrome. Both the path service
 232   // and to the plugin service.
 233   current_version_ = version;
 234   PathService::Override(chrome::DIR_PEPPER_FLASH_PLUGIN, path);
 235   path = path.Append(chrome::kPepperFlashPluginFilename);
 236   BrowserThread::PostTask(
 237       BrowserThread::UI,
 238       FROM_HERE,
 239       base::Bind(&RegisterPepperFlashWithChrome, path, version));
 240   return true;
 241 }
 242
 243 bool PepperFlashComponentInstaller::GetInstalledFile(
 244     const std::string& file,
 245     base::FilePath* installed_file) {
 246   return false;
 247 }
 248
 249 bool PepperFlashComponentInstaller::Uninstall() {
 250   return false;
 251 }
 252
 253
 254
 255 namespace {
 256
 257 #if defined(GOOGLE_CHROME_BUILD) && !defined(OS_LINUX)
 258 void FinishPepperFlashUpdateRegistration(ComponentUpdateService* cus,
 259                                          const Version& version) {
 260   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 261   update_client::CrxComponent pepflash;
 262   pepflash.name = "pepper_flash";
 263   pepflash.installer = new PepperFlashComponentInstaller(version);
 264   pepflash.version = version;
 265   pepflash.pk_hash.assign(kSha2Hash, &kSha2Hash[sizeof(kSha2Hash)]);
 266   if (!cus->RegisterComponent(pepflash))
 267     NOTREACHED() << "Pepper Flash component registration failed.";
 268 }
 269
 270 void StartPepperFlashUpdateRegistration(ComponentUpdateService* cus) {
 271   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 272   base::FilePath path = GetPepperFlashBaseDirectory();
 273   if (!base::PathExists(path)) {
 274     if (!base::CreateDirectory(path)) {
 275       NOTREACHED() << "Could not create Pepper Flash directory.";
 276       return;
 277     }
 278   }
 279
 280   Version version(kNullVersion);
 281   std::vector<base::FilePath> older_dirs;
 282   if (GetPepperFlashDirectory(&path, &version, &older_dirs)) {
 283     path = path.Append(chrome::kPepperFlashPluginFilename);
 284     if (base::PathExists(path)) {
 285       BrowserThread::PostTask(
 286           BrowserThread::UI,
 287           FROM_HERE,
 288           base::Bind(&RegisterPepperFlashWithChrome, path, version));
 289     } else {
 290       version = Version(kNullVersion);
 291     }
 292   }
 293
 294   BrowserThread::PostTask(
 295       BrowserThread::UI,
 296       FROM_HERE,
 297       base::Bind(&FinishPepperFlashUpdateRegistration, cus, version));
 298
 299   // Remove older versions of Pepper Flash.
 300   for (std::vector<base::FilePath>::iterator iter = older_dirs.begin();
 301        iter != older_dirs.end();
 302        ++iter) {
 303     base::DeleteFile(*iter, true);
 304   }
 305 }
 306 #endif  // defined(GOOGLE_CHROME_BUILD) && !defined(OS_LINUX)
 307
 308 }  // namespace
 309
 310 void RegisterPepperFlashComponent(ComponentUpdateService* cus) {
 311 #if defined(GOOGLE_CHROME_BUILD) && !defined(OS_LINUX)
 312   // Component updated flash supersedes bundled flash therefore if that one
 313   // is disabled then this one should never install.
 314   base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
 315   if (cmd_line->HasSwitch(switches::kDisableBundledPpapiFlash))
 316     return;
 317   BrowserThread::PostTask(BrowserThread::FILE,
 318                           FROM_HERE,
 319                           base::Bind(&StartPepperFlashUpdateRegistration, cus));
 320 #endif
 321 }
 322
 323 }  // namespace component_updater