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// Copyright 2022 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/updater/usage_stats_permissions.h"
#include <algorithm>
#include <cwchar>
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "base/logging.h"
#include "base/strings/strcat.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/registry.h"
#include "base/win/windows_types.h"
#include "chrome/updater/app/app_utils.h"
#include "chrome/updater/external_constants.h"
#include "chrome/updater/persisted_data.h"
#include "chrome/updater/updater_scope.h"
#include "chrome/updater/util/win_util.h"
#include "chrome/updater/win/win_constants.h"
namespace updater {
namespace {
std::vector<std::wstring> GetClientStatePathsForScope(UpdaterScope scope) {
std::vector<std::wstring> paths = {CLIENT_STATE_KEY};
if (IsSystemInstall(scope)) {
paths.push_back(CLIENT_STATE_MEDIUM_KEY);
}
return paths;
}
std::vector<std::string> GetInstalledAppIds(
HKEY hive,
const std::vector<std::wstring>& key_paths) {
std::vector<std::string> app_ids;
for (const std::wstring& path : key_paths) {
for (base::win::RegistryKeyIterator it(hive, path.c_str(), KEY_WOW64_32KEY);
it.Valid(); ++it) {
std::string app_id;
if (!base::WideToUTF8(it.Name(), wcslen(it.Name()), &app_id)) {
VLOG(1) << "AppId " << it.Name() << " from registry is not UTF-8";
continue;
}
app_ids.push_back(app_id);
}
}
return app_ids;
}
bool AppAllowsUsageStats(HKEY hive,
const std::vector<std::wstring>& key_paths,
const std::string& app_id) {
return std::ranges::any_of(key_paths, [&](std::wstring key_path) {
DWORD usagestats = 0;
base::win::RegKey key;
return key.Open(hive,
base::StrCat({key_path, base::UTF8ToWide(app_id)}).c_str(),
Wow6432(KEY_READ)) == ERROR_SUCCESS &&
key.ReadValueDW(L"usagestats", &usagestats) == ERROR_SUCCESS &&
usagestats == 1;
});
}
} // namespace
bool AnyAppEnablesUsageStats(HKEY hive,
const std::vector<std::wstring>& key_paths) {
bool allowed = std::ranges::any_of(
GetInstalledAppIds(hive, key_paths), [&](const std::string& app_id) {
if (!IsUpdaterOrCompanionApp(app_id) &&
AppAllowsUsageStats(hive, key_paths, app_id)) {
VLOG(2) << "usage stats enabled by app " << app_id;
return true;
}
return false;
});
if (!allowed) {
VLOG(2) << "no app enables usage stats";
}
return allowed;
}
bool RemoteEventLoggingAllowed(
HKEY hive,
const std::vector<std::wstring>& key_paths,
const std::vector<std::string>& installed_app_ids,
std::optional<EventLoggingPermissionProvider>
event_logging_permission_provider) {
if (!event_logging_permission_provider) {
VLOG(2) << "Event logging disabled by absence of permission provider";
return false;
}
bool manages_additional_apps =
std::ranges::any_of(installed_app_ids, [&](const std::string& app_id) {
return !IsUpdaterOrCompanionApp(app_id) &&
!base::EqualsCaseInsensitiveASCII(
app_id, event_logging_permission_provider->app_id);
});
if (manages_additional_apps) {
VLOG(2) << "Event logging disabled by presence of other apps";
return false;
}
bool allowed = AppAllowsUsageStats(hive, key_paths,
event_logging_permission_provider->app_id);
VLOG_IF(2, !allowed) << "Event logging disabled; app "
<< event_logging_permission_provider->app_id
<< " does not enable usage stats";
return allowed;
}
bool AnyAppEnablesUsageStats(UpdaterScope scope) {
return AnyAppEnablesUsageStats(UpdaterScopeToHKeyRoot(scope),
GetClientStatePathsForScope(scope));
}
bool RemoteEventLoggingAllowed(
UpdaterScope scope,
const std::vector<std::string>& installed_app_ids,
std::optional<EventLoggingPermissionProvider>
event_logging_permission_provider) {
return RemoteEventLoggingAllowed(
UpdaterScopeToHKeyRoot(scope), GetClientStatePathsForScope(scope),
installed_app_ids, std::move(event_logging_permission_provider));
}
} // namespace updater
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