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