extensions/common/extension.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 "extensions/common/extension.h"
   6
   7 #include "base/base64.h"
   8 #include "base/basictypes.h"
   9 #include "base/command_line.h"
  10 #include "base/files/file_path.h"
  11 #include "base/i18n/rtl.h"
  12 #include "base/logging.h"
  13 #include "base/memory/singleton.h"
  14 #include "base/stl_util.h"
  15 #include "base/strings/string16.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/strings/string_piece.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/values.h"
  22 #include "base/version.h"
  23 #include "content/public/common/url_constants.h"
  24 #include "extensions/common/constants.h"
  25 #include "extensions/common/error_utils.h"
  26 #include "extensions/common/id_util.h"
  27 #include "extensions/common/manifest.h"
  28 #include "extensions/common/manifest_constants.h"
  29 #include "extensions/common/manifest_handler.h"
  30 #include "extensions/common/permissions/api_permission_set.h"
  31 #include "extensions/common/permissions/permission_set.h"
  32 #include "extensions/common/permissions/permissions_data.h"
  33 #include "extensions/common/permissions/permissions_info.h"
  34 #include "extensions/common/switches.h"
  35 #include "extensions/common/url_pattern_set.h"
  36 #include "grit/chromium_strings.h"
  37 #include "net/base/filename_util.h"
  38 #include "url/url_util.h"
  39
  40 #if defined(OS_WIN)
  41 #include "grit/generated_resources.h"
  42 #endif
  43
  44 namespace extensions {
  45
  46 namespace keys = manifest_keys;
  47 namespace values = manifest_values;
  48 namespace errors = manifest_errors;
  49
  50 namespace {
  51
  52 const int kModernManifestVersion = 2;
  53 const int kPEMOutputColumns = 64;
  54
  55 // KEY MARKERS
  56 const char kKeyBeginHeaderMarker[] = "-----BEGIN";
  57 const char kKeyBeginFooterMarker[] = "-----END";
  58 const char kKeyInfoEndMarker[] = "KEY-----";
  59 const char kPublic[] = "PUBLIC";
  60 const char kPrivate[] = "PRIVATE";
  61
  62 bool ContainsReservedCharacters(const base::FilePath& path) {
  63   // We should disallow backslash '\\' as file path separator even on Windows,
  64   // because the backslash is not regarded as file path separator on Linux/Mac.
  65   // Extensions are cross-platform.
  66   // Since FilePath uses backslash '\\' as file path separator on Windows, so we
  67   // need to check manually.
  68   if (path.value().find('\\') != path.value().npos)
  69     return true;
  70   return !net::IsSafePortableRelativePath(path);
  71 }
  72
  73 }  // namespace
  74
  75 const char Extension::kMimeType[] = "application/x-chrome-extension";
  76
  77 const int Extension::kValidWebExtentSchemes =
  78     URLPattern::SCHEME_HTTP | URLPattern::SCHEME_HTTPS;
  79
  80 const int Extension::kValidHostPermissionSchemes = URLPattern::SCHEME_CHROMEUI |
  81                                                    URLPattern::SCHEME_HTTP |
  82                                                    URLPattern::SCHEME_HTTPS |
  83                                                    URLPattern::SCHEME_FILE |
  84                                                    URLPattern::SCHEME_FTP;
  85
  86 //
  87 // Extension
  88 //
  89
  90 // static
  91 scoped_refptr<Extension> Extension::Create(const base::FilePath& path,
  92                                            Manifest::Location location,
  93                                            const base::DictionaryValue& value,
  94                                            int flags,
  95                                            std::string* utf8_error) {
  96   return Extension::Create(path,
  97                            location,
  98                            value,
  99                            flags,
 100                            std::string(),  // ID is ignored if empty.
 101                            utf8_error);
 102 }
 103
 104 // TODO(sungguk): Continue removing std::string errors and replacing
 105 // with base::string16. See http://crbug.com/71980.
 106 scoped_refptr<Extension> Extension::Create(const base::FilePath& path,
 107                                            Manifest::Location location,
 108                                            const base::DictionaryValue& value,
 109                                            int flags,
 110                                            const std::string& explicit_id,
 111                                            std::string* utf8_error) {
 112   DCHECK(utf8_error);
 113   base::string16 error;
 114   scoped_ptr<extensions::Manifest> manifest(
 115       new extensions::Manifest(
 116           location, scoped_ptr<base::DictionaryValue>(value.DeepCopy())));
 117
 118   if (!InitExtensionID(manifest.get(), path, explicit_id, flags, &error)) {
 119     *utf8_error = base::UTF16ToUTF8(error);
 120     return NULL;
 121   }
 122
 123   std::vector<InstallWarning> install_warnings;
 124   if (!manifest->ValidateManifest(utf8_error, &install_warnings)) {
 125     return NULL;
 126   }
 127
 128   scoped_refptr<Extension> extension = new Extension(path, manifest.Pass());
 129   extension->install_warnings_.swap(install_warnings);
 130
 131   if (!extension->InitFromValue(flags, &error)) {
 132     *utf8_error = base::UTF16ToUTF8(error);
 133     return NULL;
 134   }
 135
 136   return extension;
 137 }
 138
 139 // static
 140 bool Extension::IdIsValid(const std::string& id) {
 141   // Verify that the id is legal.
 142   if (id.size() != (id_util::kIdSize * 2))
 143     return false;
 144
 145   // We only support lowercase IDs, because IDs can be used as URL components
 146   // (where GURL will lowercase it).
 147   std::string temp = StringToLowerASCII(id);
 148   for (size_t i = 0; i < temp.size(); i++)
 149     if (temp[i] < 'a' || temp[i] > 'p')
 150       return false;
 151
 152   return true;
 153 }
 154
 155 Manifest::Type Extension::GetType() const {
 156   return converted_from_user_script() ?
 157       Manifest::TYPE_USER_SCRIPT : manifest_->type();
 158 }
 159
 160 // static
 161 GURL Extension::GetResourceURL(const GURL& extension_url,
 162                                const std::string& relative_path) {
 163   DCHECK(extension_url.SchemeIs(extensions::kExtensionScheme));
 164   DCHECK_EQ("/", extension_url.path());
 165
 166   std::string path = relative_path;
 167
 168   // If the relative path starts with "/", it is "absolute" relative to the
 169   // extension base directory, but extension_url is already specified to refer
 170   // to that base directory, so strip the leading "/" if present.
 171   if (relative_path.size() > 0 && relative_path[0] == '/')
 172     path = relative_path.substr(1);
 173
 174   GURL ret_val = GURL(extension_url.spec() + path);
 175   DCHECK(StartsWithASCII(ret_val.spec(), extension_url.spec(), false));
 176
 177   return ret_val;
 178 }
 179
 180 bool Extension::ResourceMatches(const URLPatternSet& pattern_set,
 181                                 const std::string& resource) const {
 182   return pattern_set.MatchesURL(extension_url_.Resolve(resource));
 183 }
 184
 185 ExtensionResource Extension::GetResource(
 186     const std::string& relative_path) const {
 187   std::string new_path = relative_path;
 188   // We have some legacy data where resources have leading slashes.
 189   // See: http://crbug.com/121164
 190   if (!new_path.empty() && new_path.at(0) == '/')
 191     new_path.erase(0, 1);
 192   base::FilePath relative_file_path = base::FilePath::FromUTF8Unsafe(new_path);
 193   if (ContainsReservedCharacters(relative_file_path))
 194     return ExtensionResource();
 195   ExtensionResource r(id(), path(), relative_file_path);
 196   if ((creation_flags() & Extension::FOLLOW_SYMLINKS_ANYWHERE)) {
 197     r.set_follow_symlinks_anywhere();
 198   }
 199   return r;
 200 }
 201
 202 ExtensionResource Extension::GetResource(
 203     const base::FilePath& relative_file_path) const {
 204   if (ContainsReservedCharacters(relative_file_path))
 205     return ExtensionResource();
 206   ExtensionResource r(id(), path(), relative_file_path);
 207   if ((creation_flags() & Extension::FOLLOW_SYMLINKS_ANYWHERE)) {
 208     r.set_follow_symlinks_anywhere();
 209   }
 210   return r;
 211 }
 212
 213 // TODO(rafaelw): Move ParsePEMKeyBytes, ProducePEM & FormatPEMForOutput to a
 214 // util class in base:
 215 // http://code.google.com/p/chromium/issues/detail?id=13572
 216 // static
 217 bool Extension::ParsePEMKeyBytes(const std::string& input,
 218                                  std::string* output) {
 219   DCHECK(output);
 220   if (!output)
 221     return false;
 222   if (input.length() == 0)
 223     return false;
 224
 225   std::string working = input;
 226   if (StartsWithASCII(working, kKeyBeginHeaderMarker, true)) {
 227     working = base::CollapseWhitespaceASCII(working, true);
 228     size_t header_pos = working.find(kKeyInfoEndMarker,
 229       sizeof(kKeyBeginHeaderMarker) - 1);
 230     if (header_pos == std::string::npos)
 231       return false;
 232     size_t start_pos = header_pos + sizeof(kKeyInfoEndMarker) - 1;
 233     size_t end_pos = working.rfind(kKeyBeginFooterMarker);
 234     if (end_pos == std::string::npos)
 235       return false;
 236     if (start_pos >= end_pos)
 237       return false;
 238
 239     working = working.substr(start_pos, end_pos - start_pos);
 240     if (working.length() == 0)
 241       return false;
 242   }
 243
 244   return base::Base64Decode(working, output);
 245 }
 246
 247 // static
 248 bool Extension::ProducePEM(const std::string& input, std::string* output) {
 249   DCHECK(output);
 250   if (input.empty())
 251     return false;
 252   base::Base64Encode(input, output);
 253   return true;
 254 }
 255
 256 // static
 257 bool Extension::FormatPEMForFileOutput(const std::string& input,
 258                                        std::string* output,
 259                                        bool is_public) {
 260   DCHECK(output);
 261   if (input.length() == 0)
 262     return false;
 263   *output = "";
 264   output->append(kKeyBeginHeaderMarker);
 265   output->append(" ");
 266   output->append(is_public ? kPublic : kPrivate);
 267   output->append(" ");
 268   output->append(kKeyInfoEndMarker);
 269   output->append("\n");
 270   for (size_t i = 0; i < input.length(); ) {
 271     int slice = std::min<int>(input.length() - i, kPEMOutputColumns);
 272     output->append(input.substr(i, slice));
 273     output->append("\n");
 274     i += slice;
 275   }
 276   output->append(kKeyBeginFooterMarker);
 277   output->append(" ");
 278   output->append(is_public ? kPublic : kPrivate);
 279   output->append(" ");
 280   output->append(kKeyInfoEndMarker);
 281   output->append("\n");
 282
 283   return true;
 284 }
 285
 286 // static
 287 GURL Extension::GetBaseURLFromExtensionId(const std::string& extension_id) {
 288   return GURL(std::string(extensions::kExtensionScheme) +
 289               content::kStandardSchemeSeparator + extension_id + "/");
 290 }
 291
 292 bool Extension::HasAPIPermission(APIPermission::ID permission) const {
 293   return PermissionsData::HasAPIPermission(this, permission);
 294 }
 295
 296 bool Extension::HasAPIPermission(const std::string& permission_name) const {
 297   return PermissionsData::HasAPIPermission(this, permission_name);
 298 }
 299
 300 scoped_refptr<const PermissionSet> Extension::GetActivePermissions() const {
 301   return PermissionsData::GetActivePermissions(this);
 302 }
 303
 304 bool Extension::ShowConfigureContextMenus() const {
 305   // Don't show context menu for component extensions. We might want to show
 306   // options for component extension button but now there is no component
 307   // extension with options. All other menu items like uninstall have
 308   // no sense for component extensions.
 309   return location() != Manifest::COMPONENT &&
 310          location() != Manifest::EXTERNAL_COMPONENT;
 311 }
 312
 313 bool Extension::OverlapsWithOrigin(const GURL& origin) const {
 314   if (url() == origin)
 315     return true;
 316
 317   if (web_extent().is_empty())
 318     return false;
 319
 320   // Note: patterns and extents ignore port numbers.
 321   URLPattern origin_only_pattern(kValidWebExtentSchemes);
 322   if (!origin_only_pattern.SetScheme(origin.scheme()))
 323     return false;
 324   origin_only_pattern.SetHost(origin.host());
 325   origin_only_pattern.SetPath("/*");
 326
 327   URLPatternSet origin_only_pattern_list;
 328   origin_only_pattern_list.AddPattern(origin_only_pattern);
 329
 330   return web_extent().OverlapsWith(origin_only_pattern_list);
 331 }
 332
 333 bool Extension::RequiresSortOrdinal() const {
 334   return is_app() && (display_in_launcher_ || display_in_new_tab_page_);
 335 }
 336
 337 bool Extension::ShouldDisplayInAppLauncher() const {
 338   // Only apps should be displayed in the launcher.
 339   return is_app() && display_in_launcher_ && !is_ephemeral();
 340 }
 341
 342 bool Extension::ShouldDisplayInNewTabPage() const {
 343   // Only apps should be displayed on the NTP.
 344   return is_app() && display_in_new_tab_page_ && !is_ephemeral();
 345 }
 346
 347 bool Extension::ShouldDisplayInExtensionSettings() const {
 348   // Don't show for themes since the settings UI isn't really useful for them.
 349   if (is_theme())
 350     return false;
 351
 352   // Don't show component extensions and invisible apps.
 353   if (ShouldNotBeVisible())
 354     return false;
 355
 356   // Always show unpacked extensions and apps.
 357   if (Manifest::IsUnpackedLocation(location()))
 358     return true;
 359
 360   // Unless they are unpacked, never show hosted apps. Note: We intentionally
 361   // show packaged apps and platform apps because there are some pieces of
 362   // functionality that are only available in chrome://extensions/ but which
 363   // are needed for packaged and platform apps. For example, inspecting
 364   // background pages. See http://crbug.com/116134.
 365   if (is_hosted_app())
 366     return false;
 367
 368   return true;
 369 }
 370
 371 bool Extension::ShouldNotBeVisible() const {
 372   // Don't show component extensions because they are only extensions as an
 373   // implementation detail of Chrome.
 374   if (extensions::Manifest::IsComponentLocation(location()) &&
 375       !CommandLine::ForCurrentProcess()->HasSwitch(
 376           switches::kShowComponentExtensionOptions)) {
 377     return true;
 378   }
 379
 380   // Always show unpacked extensions and apps.
 381   if (Manifest::IsUnpackedLocation(location()))
 382     return false;
 383
 384   // Don't show apps that aren't visible in either launcher or ntp.
 385   if (is_app() && !ShouldDisplayInAppLauncher() && !ShouldDisplayInNewTabPage())
 386     return true;
 387
 388   return false;
 389 }
 390
 391 Extension::ManifestData* Extension::GetManifestData(const std::string& key)
 392     const {
 393   DCHECK(finished_parsing_manifest_ || thread_checker_.CalledOnValidThread());
 394   ManifestDataMap::const_iterator iter = manifest_data_.find(key);
 395   if (iter != manifest_data_.end())
 396     return iter->second.get();
 397   return NULL;
 398 }
 399
 400 void Extension::SetManifestData(const std::string& key,
 401                                 Extension::ManifestData* data) {
 402   DCHECK(!finished_parsing_manifest_ && thread_checker_.CalledOnValidThread());
 403   manifest_data_[key] = linked_ptr<ManifestData>(data);
 404 }
 405
 406 Manifest::Location Extension::location() const {
 407   return manifest_->location();
 408 }
 409
 410 const std::string& Extension::id() const {
 411   return manifest_->extension_id();
 412 }
 413
 414 const std::string Extension::VersionString() const {
 415   return version()->GetString();
 416 }
 417
 418 void Extension::AddInstallWarning(const InstallWarning& new_warning) {
 419   install_warnings_.push_back(new_warning);
 420 }
 421
 422 void Extension::AddInstallWarnings(
 423     const std::vector<InstallWarning>& new_warnings) {
 424   install_warnings_.insert(install_warnings_.end(),
 425                            new_warnings.begin(), new_warnings.end());
 426 }
 427
 428 bool Extension::is_app() const {
 429   return manifest_->is_app();
 430 }
 431
 432 bool Extension::is_platform_app() const {
 433   return manifest_->is_platform_app();
 434 }
 435
 436 bool Extension::is_hosted_app() const {
 437   return manifest()->is_hosted_app();
 438 }
 439
 440 bool Extension::is_legacy_packaged_app() const {
 441   return manifest()->is_legacy_packaged_app();
 442 }
 443
 444 bool Extension::is_extension() const {
 445   return manifest()->is_extension();
 446 }
 447
 448 bool Extension::can_be_incognito_enabled() const {
 449   // Only component platform apps are supported in incognito.
 450   return !is_platform_app() || location() == Manifest::COMPONENT;
 451 }
 452
 453 void Extension::AddWebExtentPattern(const URLPattern& pattern) {
 454   // Bookmark apps are permissionless.
 455   if (from_bookmark())
 456     return;
 457
 458   extent_.AddPattern(pattern);
 459 }
 460
 461 bool Extension::is_theme() const {
 462   return manifest()->is_theme();
 463 }
 464
 465 // static
 466 bool Extension::InitExtensionID(extensions::Manifest* manifest,
 467                                 const base::FilePath& path,
 468                                 const std::string& explicit_id,
 469                                 int creation_flags,
 470                                 base::string16* error) {
 471   if (!explicit_id.empty()) {
 472     manifest->set_extension_id(explicit_id);
 473     return true;
 474   }
 475
 476   if (manifest->HasKey(keys::kPublicKey)) {
 477     std::string public_key;
 478     std::string public_key_bytes;
 479     if (!manifest->GetString(keys::kPublicKey, &public_key) ||
 480         !ParsePEMKeyBytes(public_key, &public_key_bytes)) {
 481       *error = base::ASCIIToUTF16(errors::kInvalidKey);
 482       return false;
 483     }
 484     std::string extension_id = id_util::GenerateId(public_key_bytes);
 485     manifest->set_extension_id(extension_id);
 486     return true;
 487   }
 488
 489   if (creation_flags & REQUIRE_KEY) {
 490     *error = base::ASCIIToUTF16(errors::kInvalidKey);
 491     return false;
 492   } else {
 493     // If there is a path, we generate the ID from it. This is useful for
 494     // development mode, because it keeps the ID stable across restarts and
 495     // reloading the extension.
 496     std::string extension_id = id_util::GenerateIdForPath(path);
 497     if (extension_id.empty()) {
 498       NOTREACHED() << "Could not create ID from path.";
 499       return false;
 500     }
 501     manifest->set_extension_id(extension_id);
 502     return true;
 503   }
 504 }
 505
 506 Extension::Extension(const base::FilePath& path,
 507                      scoped_ptr<extensions::Manifest> manifest)
 508     : manifest_version_(0),
 509       converted_from_user_script_(false),
 510       manifest_(manifest.release()),
 511       finished_parsing_manifest_(false),
 512       display_in_launcher_(true),
 513       display_in_new_tab_page_(true),
 514       wants_file_access_(false),
 515       creation_flags_(0) {
 516   DCHECK(path.empty() || path.IsAbsolute());
 517   path_ = id_util::MaybeNormalizePath(path);
 518 }
 519
 520 Extension::~Extension() {
 521 }
 522
 523 bool Extension::InitFromValue(int flags, base::string16* error) {
 524   DCHECK(error);
 525
 526   creation_flags_ = flags;
 527
 528   // Important to load manifest version first because many other features
 529   // depend on its value.
 530   if (!LoadManifestVersion(error))
 531     return false;
 532
 533   if (!LoadRequiredFeatures(error))
 534     return false;
 535
 536   // We don't need to validate because InitExtensionID already did that.
 537   manifest_->GetString(keys::kPublicKey, &public_key_);
 538
 539   extension_url_ = Extension::GetBaseURLFromExtensionId(id());
 540
 541   // Load App settings. LoadExtent at least has to be done before
 542   // ParsePermissions(), because the valid permissions depend on what type of
 543   // package this is.
 544   if (is_app() && !LoadAppFeatures(error))
 545     return false;
 546
 547   permissions_data_.reset(new PermissionsData);
 548   if (!permissions_data_->ParsePermissions(this, error))
 549     return false;
 550
 551   if (manifest_->HasKey(keys::kConvertedFromUserScript)) {
 552     manifest_->GetBoolean(keys::kConvertedFromUserScript,
 553                           &converted_from_user_script_);
 554   }
 555
 556   if (!LoadSharedFeatures(error))
 557     return false;
 558
 559   finished_parsing_manifest_ = true;
 560
 561   permissions_data_->InitializeManifestPermissions(this);
 562   permissions_data_->FinalizePermissions(this);
 563
 564   return true;
 565 }
 566
 567 bool Extension::LoadRequiredFeatures(base::string16* error) {
 568   if (!LoadName(error) ||
 569       !LoadVersion(error))
 570     return false;
 571   return true;
 572 }
 573
 574 bool Extension::LoadName(base::string16* error) {
 575   base::string16 localized_name;
 576   if (!manifest_->GetString(keys::kName, &localized_name)) {
 577     *error = base::ASCIIToUTF16(errors::kInvalidName);
 578     return false;
 579   }
 580   non_localized_name_ = base::UTF16ToUTF8(localized_name);
 581   base::i18n::AdjustStringForLocaleDirection(&localized_name);
 582   name_ = base::UTF16ToUTF8(localized_name);
 583   return true;
 584 }
 585
 586 bool Extension::LoadVersion(base::string16* error) {
 587   std::string version_str;
 588   if (!manifest_->GetString(keys::kVersion, &version_str)) {
 589     *error = base::ASCIIToUTF16(errors::kInvalidVersion);
 590     return false;
 591   }
 592   version_.reset(new Version(version_str));
 593   if (!version_->IsValid() || version_->components().size() > 4) {
 594     *error = base::ASCIIToUTF16(errors::kInvalidVersion);
 595     return false;
 596   }
 597   return true;
 598 }
 599
 600 bool Extension::LoadAppFeatures(base::string16* error) {
 601   if (!LoadExtent(keys::kWebURLs, &extent_,
 602                   errors::kInvalidWebURLs, errors::kInvalidWebURL, error)) {
 603     return false;
 604   }
 605   if (manifest_->HasKey(keys::kDisplayInLauncher) &&
 606       !manifest_->GetBoolean(keys::kDisplayInLauncher, &display_in_launcher_)) {
 607     *error = base::ASCIIToUTF16(errors::kInvalidDisplayInLauncher);
 608     return false;
 609   }
 610   if (manifest_->HasKey(keys::kDisplayInNewTabPage)) {
 611     if (!manifest_->GetBoolean(keys::kDisplayInNewTabPage,
 612                                &display_in_new_tab_page_)) {
 613       *error = base::ASCIIToUTF16(errors::kInvalidDisplayInNewTabPage);
 614       return false;
 615     }
 616   } else {
 617     // Inherit default from display_in_launcher property.
 618     display_in_new_tab_page_ = display_in_launcher_;
 619   }
 620   return true;
 621 }
 622
 623 bool Extension::LoadExtent(const char* key,
 624                            URLPatternSet* extent,
 625                            const char* list_error,
 626                            const char* value_error,
 627                            base::string16* error) {
 628   const base::Value* temp_pattern_value = NULL;
 629   if (!manifest_->Get(key, &temp_pattern_value))
 630     return true;
 631
 632   const base::ListValue* pattern_list = NULL;
 633   if (!temp_pattern_value->GetAsList(&pattern_list)) {
 634     *error = base::ASCIIToUTF16(list_error);
 635     return false;
 636   }
 637
 638   for (size_t i = 0; i < pattern_list->GetSize(); ++i) {
 639     std::string pattern_string;
 640     if (!pattern_list->GetString(i, &pattern_string)) {
 641       *error = ErrorUtils::FormatErrorMessageUTF16(value_error,
 642                                                    base::UintToString(i),
 643                                                    errors::kExpectString);
 644       return false;
 645     }
 646
 647     URLPattern pattern(kValidWebExtentSchemes);
 648     URLPattern::ParseResult parse_result = pattern.Parse(pattern_string);
 649     if (parse_result == URLPattern::PARSE_ERROR_EMPTY_PATH) {
 650       pattern_string += "/";
 651       parse_result = pattern.Parse(pattern_string);
 652     }
 653
 654     if (parse_result != URLPattern::PARSE_SUCCESS) {
 655       *error = ErrorUtils::FormatErrorMessageUTF16(
 656           value_error,
 657           base::UintToString(i),
 658           URLPattern::GetParseResultString(parse_result));
 659       return false;
 660     }
 661
 662     // Do not allow authors to claim "<all_urls>".
 663     if (pattern.match_all_urls()) {
 664       *error = ErrorUtils::FormatErrorMessageUTF16(
 665           value_error,
 666           base::UintToString(i),
 667           errors::kCannotClaimAllURLsInExtent);
 668       return false;
 669     }
 670
 671     // Do not allow authors to claim "*" for host.
 672     if (pattern.host().empty()) {
 673       *error = ErrorUtils::FormatErrorMessageUTF16(
 674           value_error,
 675           base::UintToString(i),
 676           errors::kCannotClaimAllHostsInExtent);
 677       return false;
 678     }
 679
 680     // We do not allow authors to put wildcards in their paths. Instead, we
 681     // imply one at the end.
 682     if (pattern.path().find('*') != std::string::npos) {
 683       *error = ErrorUtils::FormatErrorMessageUTF16(
 684           value_error,
 685           base::UintToString(i),
 686           errors::kNoWildCardsInPaths);
 687       return false;
 688     }
 689     pattern.SetPath(pattern.path() + '*');
 690
 691     extent->AddPattern(pattern);
 692   }
 693
 694   return true;
 695 }
 696
 697 bool Extension::LoadSharedFeatures(base::string16* error) {
 698   if (!LoadDescription(error) ||
 699       !ManifestHandler::ParseExtension(this, error) ||
 700       !LoadShortName(error))
 701     return false;
 702
 703   return true;
 704 }
 705
 706 bool Extension::LoadDescription(base::string16* error) {
 707   if (manifest_->HasKey(keys::kDescription) &&
 708       !manifest_->GetString(keys::kDescription, &description_)) {
 709     *error = base::ASCIIToUTF16(errors::kInvalidDescription);
 710     return false;
 711   }
 712   return true;
 713 }
 714
 715 bool Extension::LoadManifestVersion(base::string16* error) {
 716   // Get the original value out of the dictionary so that we can validate it
 717   // more strictly.
 718   if (manifest_->value()->HasKey(keys::kManifestVersion)) {
 719     int manifest_version = 1;
 720     if (!manifest_->GetInteger(keys::kManifestVersion, &manifest_version) ||
 721         manifest_version < 1) {
 722       *error = base::ASCIIToUTF16(errors::kInvalidManifestVersion);
 723       return false;
 724     }
 725   }
 726
 727   manifest_version_ = manifest_->GetManifestVersion();
 728   if (manifest_version_ < kModernManifestVersion &&
 729       ((creation_flags_ & REQUIRE_MODERN_MANIFEST_VERSION &&
 730         !CommandLine::ForCurrentProcess()->HasSwitch(
 731             switches::kAllowLegacyExtensionManifests)) ||
 732        GetType() == Manifest::TYPE_PLATFORM_APP)) {
 733     *error = ErrorUtils::FormatErrorMessageUTF16(
 734         errors::kInvalidManifestVersionOld,
 735         base::IntToString(kModernManifestVersion),
 736         is_platform_app() ? "apps" : "extensions");
 737     return false;
 738   }
 739
 740   return true;
 741 }
 742
 743 bool Extension::LoadShortName(base::string16* error) {
 744   if (manifest_->HasKey(keys::kShortName)) {
 745     base::string16 localized_short_name;
 746     if (!manifest_->GetString(keys::kShortName, &localized_short_name) ||
 747         localized_short_name.empty()) {
 748       *error = base::ASCIIToUTF16(errors::kInvalidShortName);
 749       return false;
 750     }
 751
 752     base::i18n::AdjustStringForLocaleDirection(&localized_short_name);
 753     short_name_ = base::UTF16ToUTF8(localized_short_name);
 754   } else {
 755     short_name_ = name_;
 756   }
 757   return true;
 758 }
 759
 760 ExtensionInfo::ExtensionInfo(const base::DictionaryValue* manifest,
 761                              const std::string& id,
 762                              const base::FilePath& path,
 763                              Manifest::Location location)
 764     : extension_id(id),
 765       extension_path(path),
 766       extension_location(location) {
 767   if (manifest)
 768     extension_manifest.reset(manifest->DeepCopy());
 769 }
 770
 771 ExtensionInfo::~ExtensionInfo() {}
 772
 773 InstalledExtensionInfo::InstalledExtensionInfo(
 774     const Extension* extension,
 775     bool is_update,
 776     const std::string& old_name)
 777     : extension(extension),
 778       is_update(is_update),
 779       old_name(old_name) {}
 780
 781 UnloadedExtensionInfo::UnloadedExtensionInfo(
 782     const Extension* extension,
 783     UnloadedExtensionInfo::Reason reason)
 784     : reason(reason),
 785       extension(extension) {}
 786
 787 UpdatedExtensionPermissionsInfo::UpdatedExtensionPermissionsInfo(
 788     const Extension* extension,
 789     const PermissionSet* permissions,
 790     Reason reason)
 791     : reason(reason),
 792       extension(extension),
 793       permissions(permissions) {}
 794
 795 }   // namespace extensions