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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/browser/ash/guest_os/guest_id.h"
#include <algorithm>
#include <memory>
#include <string_view>
#include <vector>
#include "base/containers/contains.h"
#include "base/logging.h"
#include "base/no_destructor.h"
#include "base/strings/string_split.h"
#include "base/strings/stringprintf.h"
#include "chrome/browser/ash/guest_os/guest_os_pref_names.h"
#include "chrome/browser/ash/guest_os/public/types.h"
#include "chrome/browser/profiles/profile.h"
#include "chromeos/ash/components/dbus/vm_applications/apps.pb.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
namespace guest_os {
namespace {
static const base::NoDestructor<std::vector<std::string>> kPropertiesAllowList{{
prefs::kContainerCreateOptions,
prefs::kContainerOsVersionKey,
prefs::kContainerOsPrettyNameKey,
prefs::kContainerColorKey,
prefs::kTerminalSupportedKey,
prefs::kTerminalLabel,
prefs::kTerminalPolicyDisabled,
prefs::kContainerSharedVmDevicesKey,
prefs::kBruschettaConfigId,
}};
} // namespace
GuestId::GuestId(VmType vm_type,
std::string vm_name,
std::string container_name) noexcept
: vm_type(vm_type),
vm_name(std::move(vm_name)),
container_name(std::move(container_name)) {}
GuestId::GuestId(std::string vm_name, std::string container_name) noexcept
: vm_type(VmType::UNKNOWN),
vm_name(std::move(vm_name)),
container_name(std::move(container_name)) {}
GuestId::GuestId(const base::Value& value) noexcept {
const base::Value::Dict* dict = value.GetIfDict();
vm_type = VmTypeFromPref(value);
const std::string* vm = nullptr;
const std::string* container = nullptr;
if (dict != nullptr) {
vm = dict->FindString(prefs::kVmNameKey);
container = dict->FindString(prefs::kContainerNameKey);
}
vm_name = vm ? *vm : "";
container_name = container ? *container : "";
}
base::flat_map<std::string, std::string> GuestId::ToMap() const {
base::flat_map<std::string, std::string> extras;
extras[prefs::kVmNameKey] = vm_name;
extras[prefs::kContainerNameKey] = container_name;
return extras;
}
base::Value::Dict GuestId::ToDictValue() const {
base::Value::Dict dict;
dict.Set(prefs::kVmTypeKey, static_cast<int>(vm_type));
dict.Set(prefs::kVmNameKey, vm_name);
dict.Set(prefs::kContainerNameKey, container_name);
return dict;
}
bool operator<(const GuestId& lhs, const GuestId& rhs) noexcept {
int result = lhs.vm_name.compare(rhs.vm_name);
if (result != 0) {
return result < 0;
}
return lhs.container_name < rhs.container_name;
}
bool operator==(const GuestId& lhs, const GuestId& rhs) noexcept {
return lhs.vm_name == rhs.vm_name && lhs.container_name == rhs.container_name;
}
std::ostream& operator<<(std::ostream& ostream, const GuestId& container_id) {
return ostream << "(type:" << container_id.vm_type << ":"
<< vm_tools::apps::VmType_Name(container_id.vm_type)
<< " vm:\"" << container_id.vm_name << "\" container:\""
<< container_id.container_name << "\")";
}
std::string GuestId::Serialize() const {
return base::StringPrintf("%s:%s:%s", VmType_Name(this->vm_type),
this->vm_name, this->container_name);
}
std::optional<GuestId> Deserialize(std::string_view guest_id_string) {
std::vector<std::string> string_tokens = base::SplitString(
guest_id_string, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (string_tokens.size() != 3) {
return {};
}
// vm_type and vm_name should be present, but container name may be empty for
// containerless guests.
if (string_tokens[0].empty() || string_tokens[1].empty()) {
return {};
}
VmType vm_type;
if (!VmType_Parse(string_tokens[0], &vm_type)) {
return {};
}
return GuestId(vm_type, string_tokens[1], string_tokens[2]);
}
bool MatchContainerDict(const base::Value& dict, const GuestId& container_id) {
const std::string* vm_name = dict.GetDict().FindString(prefs::kVmNameKey);
const std::string* container_name =
dict.GetDict().FindString(prefs::kContainerNameKey);
return (vm_name && *vm_name == container_id.vm_name) &&
(container_name && *container_name == container_id.container_name);
}
std::vector<GuestId> GetContainers(Profile* profile, VmType vm_type) {
std::vector<GuestId> result;
const base::Value::List& container_list =
profile->GetPrefs()->GetList(prefs::kGuestOsContainers);
for (const auto& container : container_list) {
guest_os::GuestId id(container);
if (id.vm_type == vm_type) {
result.push_back(std::move(id));
}
}
return result;
}
void AddContainerToPrefs(Profile* profile,
const GuestId& container_id,
base::Value::Dict properties) {
ScopedListPrefUpdate updater(profile->GetPrefs(), prefs::kGuestOsContainers);
if (std::ranges::any_of(*updater, [&container_id](const auto& dict) {
return MatchContainerDict(dict, container_id);
})) {
return;
}
base::Value::Dict new_container = container_id.ToDictValue();
for (auto [key, value] : properties) {
if (base::Contains(*kPropertiesAllowList, key)) {
new_container.Set(key, std::move(value));
}
}
updater->Append(std::move(new_container));
}
void RemoveContainerFromPrefs(Profile* profile, const GuestId& container_id) {
auto* pref_service = profile->GetPrefs();
ScopedListPrefUpdate updater(pref_service, prefs::kGuestOsContainers);
base::Value::List& update_list = updater.Get();
auto it = std::ranges::find_if(update_list, [&](const auto& dict) {
return MatchContainerDict(dict, container_id);
});
if (it != update_list.end()) {
update_list.erase(it);
}
}
void RemoveVmFromPrefs(Profile* profile, VmType vm_type) {
auto* pref_service = profile->GetPrefs();
ScopedListPrefUpdate updater(pref_service, prefs::kGuestOsContainers);
base::Value::List& update_list = updater.Get();
auto it = std::ranges::find(update_list, vm_type, &VmTypeFromPref);
if (it != update_list.end()) {
update_list.erase(it);
}
}
const base::Value* GetContainerPrefValue(Profile* profile,
const GuestId& container_id,
const std::string& key) {
const base::Value::List& containers =
profile->GetPrefs()->GetList(prefs::kGuestOsContainers);
for (const auto& dict : containers) {
if (MatchContainerDict(dict, container_id)) {
return dict.GetDict().Find(key);
}
}
return nullptr;
}
void UpdateContainerPref(Profile* profile,
const GuestId& container_id,
const std::string& key,
base::Value value) {
ScopedListPrefUpdate updater(profile->GetPrefs(), prefs::kGuestOsContainers);
auto it = std::ranges::find_if(*updater, [&](const auto& dict) {
return MatchContainerDict(dict, container_id);
});
if (it != updater->end()) {
if (base::Contains(*kPropertiesAllowList, key)) {
it->GetDict().Set(key, std::move(value));
} else {
LOG(ERROR) << "Ignoring disallowed property: " << key;
}
}
}
void MergeContainerPref(Profile* profile,
const GuestId& container_id,
const std::string& key,
base::Value::Dict dict) {
ScopedListPrefUpdate updater(profile->GetPrefs(), prefs::kGuestOsContainers);
auto it = std::ranges::find_if(*updater, [&](const auto& dict) {
return MatchContainerDict(dict, container_id);
});
if (it != updater->end()) {
if (base::Contains(*kPropertiesAllowList, key)) {
base::Value::Dict* old_container_dict = it->GetIfDict();
if (old_container_dict) {
base::Value::Dict wrapped;
wrapped.Set(key, std::move(dict));
old_container_dict->Merge(std::move(wrapped));
} else {
LOG(ERROR) << "Expected a dict for " << container_id;
}
} else {
LOG(ERROR) << "Ignoring disallowed property: " << key;
}
}
}
VmType VmTypeFromPref(const base::Value& pref) {
if (!pref.is_dict()) {
return VmType::UNKNOWN;
}
// Default is TERMINA(0) if field not present since this field was introduced
// when only TERMINA was using prefs..
auto type = pref.GetDict().FindInt(guest_os::prefs::kVmTypeKey);
if (!type.has_value()) {
LOG(WARNING) << "No VM type in pref, defaulting to termina";
return VmType::TERMINA;
}
if (*type < vm_tools::apps::VmType_MIN ||
*type > vm_tools::apps::VmType_MAX) {
return VmType::UNKNOWN;
}
return static_cast<guest_os::VmType>(*type);
}
} // namespace guest_os
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