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// Copyright 2013 The Chromium Authors
// 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_handlers/settings_overrides_handler.h"
#include <memory>
#include <utility>
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "components/url_formatter/url_formatter.h"
#include "extensions/common/error_utils.h"
#include "extensions/common/extension_set.h"
#include "extensions/common/feature_switch.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/manifest_handlers/permissions_parser.h"
#include "extensions/common/permissions/api_permission_set.h"
#include "extensions/common/permissions/manifest_permission.h"
#include "extensions/common/permissions/permissions_info.h"
#include "extensions/common/permissions/settings_override_permission.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_message_utils.h"
#include "url/gurl.h"
using extensions::api::manifest_types::ChromeSettingsOverrides;
using extensions::mojom::APIPermissionID;
namespace extensions {
namespace {
std::optional<GURL> CreateManifestURL(const std::string& url) {
std::optional<GURL> manifest_url(std::in_place, url);
if (!manifest_url->is_valid() || !manifest_url->SchemeIsHTTPOrHTTPS())
return std::nullopt;
return manifest_url;
}
std::optional<GURL> ParseHomepage(const ChromeSettingsOverrides& overrides,
std::u16string* error) {
if (!overrides.homepage)
return std::nullopt;
std::optional<GURL> manifest_url = CreateManifestURL(*overrides.homepage);
if (!manifest_url) {
*error = extensions::ErrorUtils::FormatErrorMessageUTF16(
manifest_errors::kInvalidHomepageOverrideURL, *overrides.homepage);
}
return manifest_url;
}
std::vector<GURL> ParseStartupPage(const ChromeSettingsOverrides& overrides,
std::u16string* error) {
std::vector<GURL> urls;
if (!overrides.startup_pages)
return urls;
for (std::vector<std::string>::const_iterator i =
overrides.startup_pages->begin(); i != overrides.startup_pages->end();
++i) {
std::optional<GURL> manifest_url = CreateManifestURL(*i);
if (!manifest_url) {
*error = extensions::ErrorUtils::FormatErrorMessageUTF16(
manifest_errors::kInvalidStartupOverrideURL, *i);
} else {
urls.push_back(std::move(*manifest_url));
}
}
return urls;
}
std::optional<ChromeSettingsOverrides::SearchProvider> ParseSearchEngine(
ChromeSettingsOverrides* overrides,
std::u16string* error) {
if (!overrides->search_provider)
return std::nullopt;
if (!CreateManifestURL(overrides->search_provider->search_url)) {
*error = extensions::ErrorUtils::FormatErrorMessageUTF16(
manifest_errors::kInvalidSearchEngineURL,
overrides->search_provider->search_url);
return std::nullopt;
}
if (overrides->search_provider->prepopulated_id)
return std::move(*overrides->search_provider);
auto get_missing_key_error = [](const char* missing_key) {
return extensions::ErrorUtils::FormatErrorMessageUTF16(
manifest_errors::kInvalidSearchEngineMissingKeys, missing_key);
};
if (!overrides->search_provider->name) {
*error = get_missing_key_error("name");
return std::nullopt;
}
if (!overrides->search_provider->keyword) {
*error = get_missing_key_error("keyword");
return std::nullopt;
}
if (!overrides->search_provider->encoding) {
*error = get_missing_key_error("encoding");
return std::nullopt;
}
if (!overrides->search_provider->favicon_url) {
*error = get_missing_key_error("favicon_url");
return std::nullopt;
}
if (!CreateManifestURL(*overrides->search_provider->favicon_url)) {
*error = extensions::ErrorUtils::FormatErrorMessageUTF16(
manifest_errors::kInvalidSearchEngineURL,
*overrides->search_provider->favicon_url);
return std::nullopt;
}
return std::move(*overrides->search_provider);
}
std::string FormatUrlForDisplay(const GURL& url) {
// A www. prefix is not informative and thus not worth the limited real estate
// in the permissions UI.
return url_formatter::StripWWW(url.host());
}
} // namespace
SettingsOverrides::SettingsOverrides() = default;
SettingsOverrides::~SettingsOverrides() = default;
// static
const SettingsOverrides* SettingsOverrides::Get(
const Extension* extension) {
return static_cast<SettingsOverrides*>(
extension->GetManifestData(manifest_keys::kSettingsOverride));
}
SettingsOverridesHandler::SettingsOverridesHandler() = default;
SettingsOverridesHandler::~SettingsOverridesHandler() = default;
bool SettingsOverridesHandler::Parse(Extension* extension,
std::u16string* error) {
const base::Value::Dict* dict =
extension->manifest()->FindDictPath(manifest_keys::kSettingsOverride);
CHECK(dict != nullptr);
auto settings = ChromeSettingsOverrides::FromValue(*dict);
if (!settings.has_value()) {
*error = settings.error();
return false;
}
// TODO(crbug.com/40703390): Any of {homepage, search_engine, startup_pages}'s
// parse failure should result in hard error. Currently, Parse fails only when
// all of these fail to parse.
auto info = std::make_unique<SettingsOverrides>();
std::u16string homepage_error;
info->homepage = ParseHomepage(*settings, &homepage_error);
std::u16string search_engine_error;
info->search_engine =
ParseSearchEngine(&settings.value(), &search_engine_error);
std::u16string startup_pages_error;
info->startup_pages = ParseStartupPage(*settings, &startup_pages_error);
if (!info->homepage && !info->search_engine && info->startup_pages.empty()) {
if (!homepage_error.empty()) {
*error = homepage_error;
} else if (!search_engine_error.empty()) {
*error = search_engine_error;
} else if (!startup_pages_error.empty()) {
*error = startup_pages_error;
} else {
*error = ErrorUtils::FormatErrorMessageUTF16(
manifest_errors::kInvalidEmptyDictionary,
manifest_keys::kSettingsOverride);
}
return false;
}
if (info->search_engine) {
PermissionsParser::AddAPIPermission(
extension, new SettingsOverrideAPIPermission(
PermissionsInfo::GetInstance()->GetByID(
APIPermissionID::kSearchProvider),
FormatUrlForDisplay(*CreateManifestURL(
info->search_engine->search_url))));
}
if (!info->startup_pages.empty()) {
PermissionsParser::AddAPIPermission(
extension,
new SettingsOverrideAPIPermission(
PermissionsInfo::GetInstance()->GetByID(
APIPermissionID::kStartupPages),
// We only support one startup page even though the type of the
// manifest property is a list, only the first one is used.
FormatUrlForDisplay(info->startup_pages[0])));
}
if (info->homepage) {
PermissionsParser::AddAPIPermission(
extension,
new SettingsOverrideAPIPermission(
PermissionsInfo::GetInstance()->GetByID(APIPermissionID::kHomepage),
FormatUrlForDisplay(*(info->homepage))));
}
extension->SetManifestData(manifest_keys::kSettingsOverride, std::move(info));
return true;
}
base::span<const char* const> SettingsOverridesHandler::Keys() const {
static constexpr const char* kKeys[] = {manifest_keys::kSettingsOverride};
return kKeys;
}
} // namespace extensions
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