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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/extensions/manifest.h"
#include "base/basictypes.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/string_split.h"
#include "base/values.h"
#include "chrome/common/extensions/extension_constants.h"
#include "chrome/common/extensions/extension_error_utils.h"
namespace errors = extension_manifest_errors;
namespace keys = extension_manifest_keys;
namespace extensions {
namespace {
typedef std::map<std::string, int> RestrictionMap;
struct Restrictions {
Restrictions() {
// Base keys that all manifests can specify.
map[keys::kName] = Manifest::kTypeAll;
map[keys::kVersion] = Manifest::kTypeAll;
map[keys::kManifestVersion] = Manifest::kTypeAll;
map[keys::kDescription] = Manifest::kTypeAll;
map[keys::kIcons] = Manifest::kTypeAll;
map[keys::kCurrentLocale] = Manifest::kTypeAll;
map[keys::kDefaultLocale] = Manifest::kTypeAll;
map[keys::kSignature] = Manifest::kTypeAll;
map[keys::kUpdateURL] = Manifest::kTypeAll;
map[keys::kPublicKey] = Manifest::kTypeAll;
// Type specific.
map[keys::kApp] = Manifest::kTypeHostedApp | Manifest::kTypePackagedApp |
Manifest::kTypePlatformApp;
map[keys::kTheme] = Manifest::kTypeTheme;
// keys::kPlatformApp holds a boolean, so all types can define it.
map[keys::kPlatformApp] = Manifest::kTypeAll;
// Extensions only.
map[keys::kBrowserAction] = Manifest::kTypeExtension;
map[keys::kPageAction] = Manifest::kTypeExtension;
map[keys::kPageActions] = Manifest::kTypeExtension;
map[keys::kChromeURLOverrides] = Manifest::kTypeExtension;
// Everything except themes.
int all_but_themes = Manifest::kTypeAll - Manifest::kTypeTheme;
map[keys::kPermissions] = all_but_themes;
map[keys::kOptionalPermissions] = all_but_themes;
map[keys::kOptionsPage] = all_but_themes;
map[keys::kBackground] = all_but_themes;
map[keys::kOfflineEnabled] = all_but_themes;
map[keys::kMinimumChromeVersion] = all_but_themes;
map[keys::kRequirements] = all_but_themes;
map[keys::kConvertedFromUserScript] = all_but_themes;
map[keys::kNaClModules] = all_but_themes;
map[keys::kPlugins] = all_but_themes;
// Extensions and packaged apps.
int ext_and_packaged =
Manifest::kTypeExtension | Manifest::kTypePackagedApp;
map[keys::kContentScripts] = ext_and_packaged;
map[keys::kOmnibox] = ext_and_packaged;
map[keys::kDevToolsPage] = ext_and_packaged;
map[keys::kSidebar] = ext_and_packaged;
map[keys::kHomepageURL] = ext_and_packaged;
// Extensions, packaged apps and platform apps.
int local_apps_and_ext = ext_and_packaged | Manifest::kTypePlatformApp;
map[keys::kContentSecurityPolicy] = local_apps_and_ext;
map[keys::kFileBrowserHandlers] = local_apps_and_ext;
map[keys::kIncognito] = local_apps_and_ext;
map[keys::kInputComponents] = local_apps_and_ext;
map[keys::kTtsEngine] = local_apps_and_ext;
map[keys::kIntents] = local_apps_and_ext;
}
// Returns true if the |key| is recognized.
bool IsKnownKey(const std::string& key) const {
RestrictionMap::const_iterator i = map.find(key);
return i != map.end();
}
// Returns true if the given |key| can be specified by the manifest |type|.
bool CanAccessKey(const std::string& key, Manifest::Type type) const {
RestrictionMap::const_iterator i = map.find(key);
return (i != map.end() && (type & i->second) != 0);
}
RestrictionMap map;
};
base::LazyInstance<Restrictions> g_restrictions;
} // namespace
// static
std::set<std::string> Manifest::GetAllKnownKeys() {
std::set<std::string> keys;
const RestrictionMap& map = g_restrictions.Get().map;
for (RestrictionMap::const_iterator i = map.begin(); i != map.end(); i++)
keys.insert(i->first);
return keys;
}
Manifest::Manifest(DictionaryValue* value) : value_(value) {}
Manifest::~Manifest() {}
bool Manifest::ValidateManifest(std::string* error) const {
Restrictions restrictions = g_restrictions.Get();
Type type = GetType();
for (DictionaryValue::key_iterator key = value_->begin_keys();
key != value_->end_keys(); ++key) {
// When validating the extension manifests, we ignore keys that are not
// recognized for forward compatibility.
if (!restrictions.IsKnownKey(*key)) {
// TODO(aa): Consider having an error here in the case of strict error
// checking to let developers know when they screw up.
continue;
}
if (!restrictions.CanAccessKey(*key, type)) {
*error = ExtensionErrorUtils::FormatErrorMessage(
errors::kFeatureNotAllowed, *key);
return false;
}
}
return true;
}
bool Manifest::HasKey(const std::string& key) const {
Restrictions restrictions = g_restrictions.Get();
return restrictions.CanAccessKey(key, GetType()) && value_->HasKey(key);
}
bool Manifest::Get(
const std::string& path, Value** out_value) const {
return CanAccessPath(path) && value_->Get(path, out_value);
}
bool Manifest::GetBoolean(
const std::string& path, bool* out_value) const {
return CanAccessPath(path) && value_->GetBoolean(path, out_value);
}
bool Manifest::GetInteger(
const std::string& path, int* out_value) const {
return CanAccessPath(path) && value_->GetInteger(path, out_value);
}
bool Manifest::GetString(
const std::string& path, std::string* out_value) const {
return CanAccessPath(path) && value_->GetString(path, out_value);
}
bool Manifest::GetString(
const std::string& path, string16* out_value) const {
return CanAccessPath(path) && value_->GetString(path, out_value);
}
bool Manifest::GetDictionary(
const std::string& path, DictionaryValue** out_value) const {
return CanAccessPath(path) && value_->GetDictionary(path, out_value);
}
bool Manifest::GetList(
const std::string& path, ListValue** out_value) const {
return CanAccessPath(path) && value_->GetList(path, out_value);
}
Manifest* Manifest::DeepCopy() const {
return new Manifest(value_->DeepCopy());
}
bool Manifest::Equals(const Manifest* other) const {
return other && value_->Equals(other->value());
}
Manifest::Type Manifest::GetType() const {
if (value_->HasKey(keys::kTheme))
return kTypeTheme;
bool is_platform_app = false;
if (value_->GetBoolean(keys::kPlatformApp, &is_platform_app) &&
is_platform_app)
return kTypePlatformApp;
if (value_->HasKey(keys::kApp)) {
if (value_->Get(keys::kWebURLs, NULL) ||
value_->Get(keys::kLaunchWebURL, NULL))
return kTypeHostedApp;
else
return kTypePackagedApp;
} else {
return kTypeExtension;
}
}
bool Manifest::IsTheme() const {
return GetType() == kTypeTheme;
}
bool Manifest::IsPlatformApp() const {
return GetType() == kTypePlatformApp;
}
bool Manifest::IsPackagedApp() const {
return GetType() == kTypePackagedApp;
}
bool Manifest::IsHostedApp() const {
return GetType() == kTypeHostedApp;
}
bool Manifest::CanAccessPath(const std::string& path) const {
std::vector<std::string> components;
base::SplitString(path, '.', &components);
Restrictions restrictions = g_restrictions.Get();
return restrictions.CanAccessKey(components[0], GetType());
}
} // namespace extensions
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