extensions/common/manifest_handlers/shared_module_info.cc

   1 // Copyright 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/manifest_handlers/shared_module_info.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/strings/string_number_conversions.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/version.h"
  13 #include "extensions/common/constants.h"
  14 #include "extensions/common/error_utils.h"
  15 #include "extensions/common/manifest_constants.h"
  16 #include "extensions/common/permissions/permission_set.h"
  17
  18 namespace extensions {
  19
  20 namespace keys = manifest_keys;
  21 namespace values = manifest_values;
  22 namespace errors = manifest_errors;
  23
  24 namespace {
  25
  26 const char kSharedModule[] = "shared_module";
  27
  28 static base::LazyInstance<SharedModuleInfo> g_empty_shared_module_info =
  29     LAZY_INSTANCE_INITIALIZER;
  30
  31 const SharedModuleInfo& GetSharedModuleInfo(const Extension* extension) {
  32   SharedModuleInfo* info = static_cast<SharedModuleInfo*>(
  33       extension->GetManifestData(kSharedModule));
  34   if (!info)
  35     return g_empty_shared_module_info.Get();
  36   return *info;
  37 }
  38
  39 }  // namespace
  40
  41 SharedModuleInfo::SharedModuleInfo() {
  42 }
  43
  44 SharedModuleInfo::~SharedModuleInfo() {
  45 }
  46
  47 // static
  48 void SharedModuleInfo::ParseImportedPath(const std::string& path,
  49                                          std::string* import_id,
  50                                          std::string* import_relative_path) {
  51   std::vector<std::string> tokens;
  52   Tokenize(path, std::string("/"), &tokens);
  53   if (tokens.size() > 2 && tokens[0] == kModulesDir &&
  54       Extension::IdIsValid(tokens[1])) {
  55     *import_id = tokens[1];
  56     *import_relative_path = tokens[2];
  57     for (size_t i = 3; i < tokens.size(); ++i)
  58       *import_relative_path += "/" + tokens[i];
  59   }
  60 }
  61
  62 // static
  63 bool SharedModuleInfo::IsImportedPath(const std::string& path) {
  64   std::vector<std::string> tokens;
  65   Tokenize(path, std::string("/"), &tokens);
  66   if (tokens.size() > 2 && tokens[0] == kModulesDir &&
  67       Extension::IdIsValid(tokens[1])) {
  68     return true;
  69   }
  70   return false;
  71 }
  72
  73 // static
  74 bool SharedModuleInfo::IsSharedModule(const Extension* extension) {
  75   CHECK(extension);
  76   return extension->manifest()->is_shared_module();
  77 }
  78
  79 // static
  80 bool SharedModuleInfo::IsExportAllowed(const Extension* extension,
  81                                        const std::string& relative_path) {
  82   return GetSharedModuleInfo(extension).
  83       exported_set_.MatchesURL(extension->url().Resolve(relative_path));
  84 }
  85
  86 // static
  87 bool SharedModuleInfo::ImportsExtensionById(const Extension* extension,
  88                                             const std::string& other_id) {
  89   const SharedModuleInfo& info = GetSharedModuleInfo(extension);
  90   for (size_t i = 0; i < info.imports_.size(); i++) {
  91     if (info.imports_[i].extension_id == other_id)
  92       return true;
  93   }
  94   return false;
  95 }
  96
  97 // static
  98 bool SharedModuleInfo::ImportsModules(const Extension* extension) {
  99   return GetSharedModuleInfo(extension).imports_.size() > 0;
 100 }
 101
 102 // static
 103 const std::vector<SharedModuleInfo::ImportInfo>& SharedModuleInfo::GetImports(
 104     const Extension* extension) {
 105   return GetSharedModuleInfo(extension).imports_;
 106 }
 107
 108 bool SharedModuleInfo::Parse(const Extension* extension,
 109                              base::string16* error) {
 110   bool has_import = extension->manifest()->HasKey(keys::kImport);
 111   bool has_export = extension->manifest()->HasKey(keys::kExport);
 112   if (!has_import && !has_export)
 113     return true;
 114
 115   if (has_import && has_export) {
 116     *error = base::ASCIIToUTF16(errors::kInvalidImportAndExport);
 117     return false;
 118   }
 119
 120   if (has_export) {
 121     const base::DictionaryValue* export_value = NULL;
 122     if (!extension->manifest()->GetDictionary(keys::kExport, &export_value)) {
 123       *error = base::ASCIIToUTF16(errors::kInvalidExport);
 124       return false;
 125     }
 126     const base::ListValue* resources_list = NULL;
 127     if (!export_value->GetList(keys::kResources, &resources_list)) {
 128       *error = base::ASCIIToUTF16(errors::kInvalidExportResources);
 129       return false;
 130     }
 131     for (size_t i = 0; i < resources_list->GetSize(); ++i) {
 132       std::string resource_path;
 133       if (!resources_list->GetString(i, &resource_path)) {
 134         *error = ErrorUtils::FormatErrorMessageUTF16(
 135             errors::kInvalidExportResourcesString, base::IntToString(i));
 136         return false;
 137       }
 138       const GURL& resolved_path = extension->url().Resolve(resource_path);
 139       if (!resolved_path.is_valid()) {
 140         *error = ErrorUtils::FormatErrorMessageUTF16(
 141             errors::kInvalidExportResourcesString, base::IntToString(i));
 142         return false;
 143       }
 144       exported_set_.AddPattern(
 145           URLPattern(URLPattern::SCHEME_EXTENSION, resolved_path.spec()));
 146     }
 147   }
 148
 149   if (has_import) {
 150     const base::ListValue* import_list = NULL;
 151     if (!extension->manifest()->GetList(keys::kImport, &import_list)) {
 152       *error = base::ASCIIToUTF16(errors::kInvalidImport);
 153       return false;
 154     }
 155     for (size_t i = 0; i < import_list->GetSize(); ++i) {
 156       const base::DictionaryValue* import_entry = NULL;
 157       if (!import_list->GetDictionary(i, &import_entry)) {
 158         *error = base::ASCIIToUTF16(errors::kInvalidImport);
 159         return false;
 160       }
 161       std::string extension_id;
 162       imports_.push_back(ImportInfo());
 163       if (!import_entry->GetString(keys::kId, &extension_id) ||
 164           !Extension::IdIsValid(extension_id)) {
 165         *error = ErrorUtils::FormatErrorMessageUTF16(
 166             errors::kInvalidImportId, base::IntToString(i));
 167         return false;
 168       }
 169       imports_.back().extension_id = extension_id;
 170       if (import_entry->HasKey(keys::kMinimumVersion)) {
 171         std::string min_version;
 172         if (!import_entry->GetString(keys::kMinimumVersion, &min_version)) {
 173           *error = ErrorUtils::FormatErrorMessageUTF16(
 174               errors::kInvalidImportVersion, base::IntToString(i));
 175           return false;
 176         }
 177         imports_.back().minimum_version = min_version;
 178         Version v(min_version);
 179         if (!v.IsValid()) {
 180           *error = ErrorUtils::FormatErrorMessageUTF16(
 181               errors::kInvalidImportVersion, base::IntToString(i));
 182           return false;
 183         }
 184       }
 185     }
 186   }
 187   return true;
 188 }
 189
 190
 191 SharedModuleHandler::SharedModuleHandler() {
 192 }
 193
 194 SharedModuleHandler::~SharedModuleHandler() {
 195 }
 196
 197 bool SharedModuleHandler::Parse(Extension* extension, base::string16* error) {
 198   scoped_ptr<SharedModuleInfo> info(new SharedModuleInfo);
 199   if (!info->Parse(extension, error))
 200     return false;
 201   extension->SetManifestData(kSharedModule, info.release());
 202   return true;
 203 }
 204
 205 bool SharedModuleHandler::Validate(
 206     const Extension* extension,
 207     std::string* error,
 208     std::vector<InstallWarning>* warnings) const {
 209   // Extensions that export resources should not have any permissions of their
 210   // own, instead they rely on the permissions of the extensions which import
 211   // them.
 212   if (SharedModuleInfo::IsSharedModule(extension) &&
 213       !extension->GetActivePermissions()->IsEmpty()) {
 214     *error = errors::kInvalidExportPermissions;
 215     return false;
 216   }
 217   return true;
 218 }
 219
 220 const std::vector<std::string> SharedModuleHandler::Keys() const {
 221   static const char* keys[] = {
 222     keys::kExport,
 223     keys::kImport
 224   };
 225   return std::vector<std::string>(keys, keys + arraysize(keys));
 226 }
 227
 228 }  // namespace extensions