// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <array>
#include "common/input.h"
#include "common/logging/log.h"
#include "common/string_util.h"
#include "common/tiny_mt.h"
#include "core/core.h"
#include "core/hid/emulated_controller.h"
#include "core/hid/hid_core.h"
#include "core/hid/hid_types.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/k_event.h"
#include "core/hle/service/mii/mii_manager.h"
#include "core/hle/service/mii/types.h"
#include "core/hle/service/nfp/amiibo_crypto.h"
#include "core/hle/service/nfp/nfp_device.h"
#include "core/hle/service/nfp/nfp_result.h"
#include "core/hle/service/nfp/nfp_user.h"
#include "core/hle/service/time/time_manager.h"
#include "core/hle/service/time/time_zone_content_manager.h"
#include "core/hle/service/time/time_zone_types.h"
namespace Service::NFP {
NfpDevice::NfpDevice(Core::HID::NpadIdType npad_id_, Core::System& system_,
KernelHelpers::ServiceContext& service_context_,
Kernel::KEvent* availability_change_event_)
: npad_id{npad_id_}, system{system_}, service_context{service_context_},
availability_change_event{availability_change_event_} {
activate_event = service_context.CreateEvent("IUser:NFPActivateEvent");
deactivate_event = service_context.CreateEvent("IUser:NFPDeactivateEvent");
npad_device = system.HIDCore().GetEmulatedController(npad_id);
Core::HID::ControllerUpdateCallback engine_callback{
.on_change = [this](Core::HID::ControllerTriggerType type) { NpadUpdate(type); },
.is_npad_service = false,
};
is_controller_set = true;
callback_key = npad_device->SetCallback(engine_callback);
auto& standard_steady_clock{system.GetTimeManager().GetStandardSteadyClockCore()};
current_posix_time = standard_steady_clock.GetCurrentTimePoint(system).time_point;
}
NfpDevice::~NfpDevice() {
activate_event->Close();
deactivate_event->Close();
if (!is_controller_set) {
return;
}
npad_device->DeleteCallback(callback_key);
is_controller_set = false;
};
void NfpDevice::NpadUpdate(Core::HID::ControllerTriggerType type) {
if (type == Core::HID::ControllerTriggerType::Connected ||
type == Core::HID::ControllerTriggerType::Disconnected) {
availability_change_event->Signal();
return;
}
if (type != Core::HID::ControllerTriggerType::Nfc) {
return;
}
if (!npad_device->IsConnected()) {
return;
}
const auto nfc_status = npad_device->GetNfc();
switch (nfc_status.state) {
case Common::Input::NfcState::NewAmiibo:
LoadAmiibo(nfc_status.data);
break;
case Common::Input::NfcState::AmiiboRemoved:
if (device_state == DeviceState::Initialized || device_state == DeviceState::TagRemoved) {
break;
}
if (device_state != DeviceState::SearchingForTag) {
CloseAmiibo();
}
break;
default:
break;
}
}
bool NfpDevice::LoadAmiibo(std::span<const u8> data) {
if (device_state != DeviceState::SearchingForTag) {
LOG_ERROR(Service_NFP, "Game is not looking for amiibos, current state {}", device_state);
return false;
}
if (data.size() != sizeof(EncryptedNTAG215File)) {
LOG_ERROR(Service_NFP, "Not an amiibo, size={}", data.size());
return false;
}
// TODO: Filter by allowed_protocols here
memcpy(&encrypted_tag_data, data.data(), sizeof(EncryptedNTAG215File));
device_state = DeviceState::TagFound;
deactivate_event->GetReadableEvent().Clear();
activate_event->Signal();
return true;
}
void NfpDevice::CloseAmiibo() {
LOG_INFO(Service_NFP, "Remove amiibo");
if (device_state == DeviceState::TagMounted) {
Unmount();
}
device_state = DeviceState::TagRemoved;
encrypted_tag_data = {};
tag_data = {};
activate_event->GetReadableEvent().Clear();
deactivate_event->Signal();
}
Kernel::KReadableEvent& NfpDevice::GetActivateEvent() const {
return activate_event->GetReadableEvent();
}
Kernel::KReadableEvent& NfpDevice::GetDeactivateEvent() const {
return deactivate_event->GetReadableEvent();
}
void NfpDevice::Initialize() {
device_state = npad_device->HasNfc() ? DeviceState::Initialized : DeviceState::Unavailable;
encrypted_tag_data = {};
tag_data = {};
}
void NfpDevice::Finalize() {
if (device_state == DeviceState::TagMounted) {
Unmount();
}
if (device_state == DeviceState::SearchingForTag || device_state == DeviceState::TagRemoved) {
StopDetection();
}
device_state = DeviceState::Unavailable;
}
Result NfpDevice::StartDetection(TagProtocol allowed_protocol) {
if (device_state != DeviceState::Initialized && device_state != DeviceState::TagRemoved) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return WrongDeviceState;
}
if (npad_device->SetPollingMode(Core::HID::EmulatedDeviceIndex::RightIndex,
Common::Input::PollingMode::NFC) !=
Common::Input::DriverResult::Success) {
LOG_ERROR(Service_NFP, "Nfc not supported");
return NfcDisabled;
}
device_state = DeviceState::SearchingForTag;
allowed_protocols = allowed_protocol;
return ResultSuccess;
}
Result NfpDevice::StopDetection() {
npad_device->SetPollingMode(Core::HID::EmulatedDeviceIndex::RightIndex,
Common::Input::PollingMode::Active);
if (device_state == DeviceState::Initialized) {
return ResultSuccess;
}
if (device_state == DeviceState::TagFound || device_state == DeviceState::TagMounted) {
CloseAmiibo();
return ResultSuccess;
}
if (device_state == DeviceState::SearchingForTag || device_state == DeviceState::TagRemoved) {
device_state = DeviceState::Initialized;
return ResultSuccess;
}
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return WrongDeviceState;
}
Result NfpDevice::Flush() {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
auto& settings = tag_data.settings;
const auto& current_date = GetAmiiboDate(current_posix_time);
if (settings.write_date.raw_date != current_date.raw_date) {
settings.write_date = current_date;
settings.crc_counter++;
// TODO: Find how to calculate the crc check
// settings.crc = CalculateCRC(settings);
}
tag_data.write_counter++;
if (!AmiiboCrypto::EncodeAmiibo(tag_data, encrypted_tag_data)) {
LOG_ERROR(Service_NFP, "Failed to encode data");
return WriteAmiiboFailed;
}
std::vector<u8> data(sizeof(encrypted_tag_data));
memcpy(data.data(), &encrypted_tag_data, sizeof(encrypted_tag_data));
if (!npad_device->WriteNfc(data)) {
LOG_ERROR(Service_NFP, "Error writing to file");
return WriteAmiiboFailed;
}
is_data_moddified = false;
return ResultSuccess;
}
Result NfpDevice::Mount(MountTarget mount_target_) {
if (device_state != DeviceState::TagFound) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return WrongDeviceState;
}
if (!AmiiboCrypto::IsAmiiboValid(encrypted_tag_data)) {
LOG_ERROR(Service_NFP, "Not an amiibo");
return NotAnAmiibo;
}
// Mark amiibos as read only when keys are missing
if (!AmiiboCrypto::IsKeyAvailable()) {
LOG_ERROR(Service_NFP, "No keys detected");
device_state = DeviceState::TagMounted;
mount_target = MountTarget::Rom;
return ResultSuccess;
}
if (!AmiiboCrypto::DecodeAmiibo(encrypted_tag_data, tag_data)) {
LOG_ERROR(Service_NFP, "Can't decode amiibo {}", device_state);
return CorruptedData;
}
device_state = DeviceState::TagMounted;
mount_target = mount_target_;
return ResultSuccess;
}
Result NfpDevice::Unmount() {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
// Save data before unloading the amiibo
if (is_data_moddified) {
Flush();
}
device_state = DeviceState::TagFound;
mount_target = MountTarget::None;
is_app_area_open = false;
return ResultSuccess;
}
Result NfpDevice::GetTagInfo(TagInfo& tag_info) const {
if (device_state != DeviceState::TagFound && device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
tag_info = {
.uuid = encrypted_tag_data.uuid.uid,
.uuid_length = static_cast<u8>(encrypted_tag_data.uuid.uid.size()),
.protocol = TagProtocol::TypeA,
.tag_type = TagType::Type2,
};
return ResultSuccess;
}
Result NfpDevice::GetCommonInfo(CommonInfo& common_info) const {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
const auto& settings = tag_data.settings;
// TODO: Validate this data
common_info = {
.last_write_date = settings.write_date.GetWriteDate(),
.write_counter = tag_data.write_counter,
.version = 0,
.application_area_size = sizeof(ApplicationArea),
};
return ResultSuccess;
}
Result NfpDevice::GetModelInfo(ModelInfo& model_info) const {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
const auto& model_info_data = encrypted_tag_data.user_memory.model_info;
model_info = {
.character_id = model_info_data.character_id,
.character_variant = model_info_data.character_variant,
.amiibo_type = model_info_data.amiibo_type,
.model_number = model_info_data.model_number,
.series = model_info_data.series,
};
return ResultSuccess;
}
Result NfpDevice::GetRegisterInfo(RegisterInfo& register_info) const {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
if (tag_data.settings.settings.amiibo_initialized == 0) {
return RegistrationIsNotInitialized;
}
Service::Mii::MiiManager manager;
const auto& settings = tag_data.settings;
// TODO: Validate this data
register_info = {
.mii_char_info = manager.ConvertV3ToCharInfo(tag_data.owner_mii),
.creation_date = settings.init_date.GetWriteDate(),
.amiibo_name = GetAmiiboName(settings),
.font_region = {},
};
return ResultSuccess;
}
Result NfpDevice::SetNicknameAndOwner(const AmiiboName& amiibo_name) {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
Service::Mii::MiiManager manager;
auto& settings = tag_data.settings;
settings.init_date = GetAmiiboDate(current_posix_time);
settings.write_date = GetAmiiboDate(current_posix_time);
settings.crc_counter++;
// TODO: Find how to calculate the crc check
// settings.crc = CalculateCRC(settings);
SetAmiiboName(settings, amiibo_name);
tag_data.owner_mii = manager.ConvertCharInfoToV3(manager.BuildDefault(0));
settings.settings.amiibo_initialized.Assign(1);
return Flush();
}
Result NfpDevice::RestoreAmiibo() {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
// TODO: Load amiibo from backup on system
LOG_ERROR(Service_NFP, "Not Implemented");
return ResultSuccess;
}
Result NfpDevice::DeleteAllData() {
const auto result = DeleteApplicationArea();
if (result.IsError()) {
return result;
}
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
Common::TinyMT rng{};
rng.GenerateRandomBytes(&tag_data.owner_mii, sizeof(tag_data.owner_mii));
tag_data.settings.settings.amiibo_initialized.Assign(0);
return Flush();
}
Result NfpDevice::OpenApplicationArea(u32 access_id) {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
LOG_WARNING(Service_NFP, "Application area is not initialized");
return ApplicationAreaIsNotInitialized;
}
if (tag_data.application_area_id != access_id) {
LOG_WARNING(Service_NFP, "Wrong application area id");
return WrongApplicationAreaId;
}
is_app_area_open = true;
return ResultSuccess;
}
Result NfpDevice::GetApplicationAreaId(u32& application_area_id) const {
application_area_id = {};
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
LOG_WARNING(Service_NFP, "Application area is not initialized");
return ApplicationAreaIsNotInitialized;
}
application_area_id = tag_data.application_area_id;
return ResultSuccess;
}
Result NfpDevice::GetApplicationArea(std::vector<u8>& data) const {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
if (!is_app_area_open) {
LOG_ERROR(Service_NFP, "Application area is not open");
return WrongDeviceState;
}
if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
LOG_ERROR(Service_NFP, "Application area is not initialized");
return ApplicationAreaIsNotInitialized;
}
if (data.size() > sizeof(ApplicationArea)) {
data.resize(sizeof(ApplicationArea));
}
memcpy(data.data(), tag_data.application_area.data(), data.size());
return ResultSuccess;
}
Result NfpDevice::SetApplicationArea(std::span<const u8> data) {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
if (!is_app_area_open) {
LOG_ERROR(Service_NFP, "Application area is not open");
return WrongDeviceState;
}
if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
LOG_ERROR(Service_NFP, "Application area is not initialized");
return ApplicationAreaIsNotInitialized;
}
if (data.size() > sizeof(ApplicationArea)) {
LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
return ResultUnknown;
}
Common::TinyMT rng{};
std::memcpy(tag_data.application_area.data(), data.data(), data.size());
// Fill remaining data with random numbers
rng.GenerateRandomBytes(tag_data.application_area.data() + data.size(),
sizeof(ApplicationArea) - data.size());
tag_data.applicaton_write_counter++;
is_data_moddified = true;
return ResultSuccess;
}
Result NfpDevice::CreateApplicationArea(u32 access_id, std::span<const u8> data) {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (tag_data.settings.settings.appdata_initialized.Value() != 0) {
LOG_ERROR(Service_NFP, "Application area already exist");
return ApplicationAreaExist;
}
return RecreateApplicationArea(access_id, data);
}
Result NfpDevice::RecreateApplicationArea(u32 access_id, std::span<const u8> data) {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
if (data.size() > sizeof(ApplicationArea)) {
LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
return WrongApplicationAreaSize;
}
Common::TinyMT rng{};
std::memcpy(tag_data.application_area.data(), data.data(), data.size());
// Fill remaining data with random numbers
rng.GenerateRandomBytes(tag_data.application_area.data() + data.size(),
sizeof(ApplicationArea) - data.size());
// TODO: Investigate why the title id needs to be moddified
tag_data.title_id = system.GetCurrentProcessProgramID();
tag_data.title_id = tag_data.title_id | 0x30000000ULL;
tag_data.settings.settings.appdata_initialized.Assign(1);
tag_data.application_area_id = access_id;
tag_data.applicaton_write_counter++;
tag_data.unknown = {};
return Flush();
}
Result NfpDevice::DeleteApplicationArea() {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
if (device_state == DeviceState::TagRemoved) {
return TagRemoved;
}
return WrongDeviceState;
}
if (mount_target == MountTarget::None || mount_target == MountTarget::Rom) {
LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
return WrongDeviceState;
}
Common::TinyMT rng{};
rng.GenerateRandomBytes(tag_data.application_area.data(), sizeof(ApplicationArea));
rng.GenerateRandomBytes(&tag_data.title_id, sizeof(u64));
rng.GenerateRandomBytes(&tag_data.application_area_id, sizeof(u32));
tag_data.settings.settings.appdata_initialized.Assign(0);
tag_data.applicaton_write_counter++;
tag_data.unknown = {};
return Flush();
}
u64 NfpDevice::GetHandle() const {
// Generate a handle based of the npad id
return static_cast<u64>(npad_id);
}
u32 NfpDevice::GetApplicationAreaSize() const {
return sizeof(ApplicationArea);
}
DeviceState NfpDevice::GetCurrentState() const {
return device_state;
}
Core::HID::NpadIdType NfpDevice::GetNpadId() const {
return npad_id;
}
AmiiboName NfpDevice::GetAmiiboName(const AmiiboSettings& settings) const {
std::array<char16_t, amiibo_name_length> settings_amiibo_name{};
AmiiboName amiibo_name{};
// Convert from big endian to little endian
for (std::size_t i = 0; i < amiibo_name_length; i++) {
settings_amiibo_name[i] = static_cast<u16>(settings.amiibo_name[i]);
}
// Convert from utf16 to utf8
const auto amiibo_name_utf8 = Common::UTF16ToUTF8(settings_amiibo_name.data());
memcpy(amiibo_name.data(), amiibo_name_utf8.data(), amiibo_name_utf8.size());
return amiibo_name;
}
void NfpDevice::SetAmiiboName(AmiiboSettings& settings, const AmiiboName& amiibo_name) {
std::array<char16_t, amiibo_name_length> settings_amiibo_name{};
// Convert from utf8 to utf16
const auto amiibo_name_utf16 = Common::UTF8ToUTF16(amiibo_name.data());
memcpy(settings_amiibo_name.data(), amiibo_name_utf16.data(),
amiibo_name_utf16.size() * sizeof(char16_t));
// Convert from little endian to big endian
for (std::size_t i = 0; i < amiibo_name_length; i++) {
settings.amiibo_name[i] = static_cast<u16_be>(settings_amiibo_name[i]);
}
}
AmiiboDate NfpDevice::GetAmiiboDate(s64 posix_time) const {
const auto& time_zone_manager =
system.GetTimeManager().GetTimeZoneContentManager().GetTimeZoneManager();
Time::TimeZone::CalendarInfo calendar_info{};
AmiiboDate amiibo_date{};
amiibo_date.SetYear(2000);
amiibo_date.SetMonth(1);
amiibo_date.SetDay(1);
if (time_zone_manager.ToCalendarTime({}, posix_time, calendar_info) == ResultSuccess) {
amiibo_date.SetYear(calendar_info.time.year);
amiibo_date.SetMonth(calendar_info.time.month);
amiibo_date.SetDay(calendar_info.time.day);
}
return amiibo_date;
}
} // namespace Service::NFP