core: nfp: Implement amiibo encryption
german77
parent
4ffbbc5348
commit
848f69eb19
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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-3.0-or-later
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// SPDX-FileCopyrightText: Copyright 2017 socram8888/amiitool
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// SPDX-License-Identifier: MIT
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#include <array>
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#include <mbedtls/aes.h>
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#include <mbedtls/hmac_drbg.h>
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#include "common/fs/file.h"
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#include "common/fs/path_util.h"
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#include "common/logging/log.h"
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#include "core/hle/service/mii/mii_manager.h"
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#include "core/hle/service/nfp/amiibo_crypto.h"
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namespace Service::NFP::AmiiboCrypto {
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Service::Mii::MiiInfo AmiiboRegisterInfoToMii(const AmiiboRegisterInfo& mii_info) {
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Service::Mii::MiiManager manager;
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auto mii = manager.BuildDefault(0);
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// TODO: We are ignoring a bunch of data from the amiibo mii
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mii.gender = static_cast<u8>(mii_info.mii_information.gender);
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mii.favorite_color = static_cast<u8>(mii_info.mii_information.favorite_color);
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memcpy(mii.name.data(), mii_info.mii_name.data(), 10);
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mii.height = mii_info.height;
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mii.build = mii_info.build;
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mii.faceline_type = mii_info.appearance_bits1.face_shape;
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mii.faceline_color = mii_info.appearance_bits1.skin_color;
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mii.faceline_wrinkle = mii_info.appearance_bits2.wrinkles;
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mii.faceline_make = mii_info.appearance_bits2.makeup;
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mii.hair_type = mii_info.hair_style;
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mii.hair_color = mii_info.appearance_bits3.hair_color;
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mii.hair_flip = mii_info.appearance_bits3.flip_hair;
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mii.eye_type = static_cast<u8>(mii_info.appearance_bits4.eye_type);
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mii.eye_color = static_cast<u8>(mii_info.appearance_bits4.eye_color);
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mii.eye_scale = static_cast<u8>(mii_info.appearance_bits4.eye_scale);
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mii.eye_aspect = static_cast<u8>(mii_info.appearance_bits4.eye_vertical_stretch);
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mii.eye_rotate = static_cast<u8>(mii_info.appearance_bits4.eye_rotation);
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mii.eye_x = static_cast<u8>(mii_info.appearance_bits4.eye_spacing);
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mii.eye_y = static_cast<u8>(mii_info.appearance_bits4.eye_y_position);
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mii.eyebrow_type = static_cast<u8>(mii_info.appearance_bits5.eyebrow_style);
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mii.eyebrow_color = static_cast<u8>(mii_info.appearance_bits5.eyebrow_color);
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mii.eyebrow_scale = static_cast<u8>(mii_info.appearance_bits5.eyebrow_scale);
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mii.eyebrow_aspect = static_cast<u8>(mii_info.appearance_bits5.eyebrow_yscale);
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mii.eyebrow_rotate = static_cast<u8>(mii_info.appearance_bits5.eyebrow_rotation);
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mii.eyebrow_x = static_cast<u8>(mii_info.appearance_bits5.eyebrow_spacing);
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mii.eyebrow_y = static_cast<u8>(mii_info.appearance_bits5.eyebrow_y_position);
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mii.nose_type = static_cast<u8>(mii_info.appearance_bits6.nose_type);
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mii.nose_scale = static_cast<u8>(mii_info.appearance_bits6.nose_scale);
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mii.nose_y = static_cast<u8>(mii_info.appearance_bits6.nose_y_position);
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mii.mouth_type = static_cast<u8>(mii_info.appearance_bits7.mouth_type);
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mii.mouth_color = static_cast<u8>(mii_info.appearance_bits7.mouth_color);
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mii.mouth_scale = static_cast<u8>(mii_info.appearance_bits7.mouth_scale);
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mii.mouth_aspect = static_cast<u8>(mii_info.appearance_bits7.mouth_horizontal_stretch);
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mii.mouth_y = static_cast<u8>(mii_info.appearance_bits8.mouth_y_position);
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mii.mustache_type = static_cast<u8>(mii_info.appearance_bits8.mustache_type);
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mii.mustache_scale = static_cast<u8>(mii_info.appearance_bits9.mustache_scale);
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mii.mustache_y = static_cast<u8>(mii_info.appearance_bits9.mustache_y_position);
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mii.beard_type = static_cast<u8>(mii_info.appearance_bits9.bear_type);
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mii.beard_color = static_cast<u8>(mii_info.appearance_bits9.facial_hair_color);
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mii.glasses_type = static_cast<u8>(mii_info.appearance_bits10.glasses_type);
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mii.glasses_color = static_cast<u8>(mii_info.appearance_bits10.glasses_color);
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mii.glasses_scale = static_cast<u8>(mii_info.appearance_bits10.glasses_scale);
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mii.glasses_y = static_cast<u8>(mii_info.appearance_bits10.glasses_y_position);
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mii.mole_type = static_cast<u8>(mii_info.appearance_bits11.mole_enabled);
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mii.mole_scale = static_cast<u8>(mii_info.appearance_bits11.mole_scale);
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mii.mole_x = static_cast<u8>(mii_info.appearance_bits11.mole_x_position);
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mii.mole_y = static_cast<u8>(mii_info.appearance_bits11.mole_y_position);
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// TODO: Validate mii data
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return mii;
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}
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bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
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const auto& amiibo_data = ntag_file.user_memory;
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LOG_DEBUG(Service_NFP, "uuid_lock=0x{0:x}", ntag_file.static_lock);
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LOG_DEBUG(Service_NFP, "compability_container=0x{0:x}", ntag_file.compability_container);
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LOG_INFO(Service_NFP, "write_count={}", amiibo_data.write_counter);
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LOG_INFO(Service_NFP, "character_id=0x{0:x}", amiibo_data.model_info.character_id);
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LOG_INFO(Service_NFP, "character_variant={}", amiibo_data.model_info.character_variant);
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LOG_INFO(Service_NFP, "amiibo_type={}", amiibo_data.model_info.amiibo_type);
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LOG_INFO(Service_NFP, "model_number=0x{0:x}", amiibo_data.model_info.model_number);
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LOG_INFO(Service_NFP, "series={}", amiibo_data.model_info.series);
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LOG_DEBUG(Service_NFP, "fixed_value=0x{0:x}", amiibo_data.model_info.constant_value);
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LOG_DEBUG(Service_NFP, "tag_dynamic_lock=0x{0:x}", ntag_file.dynamic_lock);
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LOG_DEBUG(Service_NFP, "tag_CFG0=0x{0:x}", ntag_file.CFG0);
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LOG_DEBUG(Service_NFP, "tag_CFG1=0x{0:x}", ntag_file.CFG1);
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// Validate UUID
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constexpr u8 CT = 0x88; // As defined in `ISO / IEC 14443 - 3`
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if ((CT ^ ntag_file.uuid[0] ^ ntag_file.uuid[1] ^ ntag_file.uuid[2]) != ntag_file.uuid[3]) {
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return false;
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}
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if ((ntag_file.uuid[4] ^ ntag_file.uuid[5] ^ ntag_file.uuid[6] ^ ntag_file.uuid[7]) !=
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ntag_file.uuid[8]) {
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return false;
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}
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// Check against all know constants on an amiibo binary
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if (ntag_file.static_lock != 0xE00F) {
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return false;
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}
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if (ntag_file.compability_container != 0xEEFF10F1U) {
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return false;
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}
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if (amiibo_data.constant_value != 0xA5) {
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return false;
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}
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if (amiibo_data.model_info.constant_value != 0x02) {
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return false;
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}
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if ((ntag_file.dynamic_lock & 0xFFFFFF) != 0x0F0001) {
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return false;
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}
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if (ntag_file.CFG0 != 0x04000000U) {
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return false;
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}
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if (ntag_file.CFG1 != 0x5F) {
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return false;
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}
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return true;
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}
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NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data) {
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NTAG215File encoded_data{};
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memcpy(encoded_data.uuid2.data(), nfc_data.uuid.data() + 0x8, 2);
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encoded_data.static_lock = nfc_data.static_lock;
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encoded_data.compability_container = nfc_data.compability_container;
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encoded_data.unfixed_hash = nfc_data.user_memory.unfixed_hash;
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encoded_data.constant_value = nfc_data.user_memory.constant_value;
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encoded_data.write_counter = nfc_data.user_memory.write_counter;
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encoded_data.settings = nfc_data.user_memory.settings;
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encoded_data.owner_mii = nfc_data.user_memory.owner_mii;
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encoded_data.title_id = nfc_data.user_memory.title_id;
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encoded_data.applicaton_write_counter = nfc_data.user_memory.applicaton_write_counter;
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encoded_data.application_area_id = nfc_data.user_memory.application_area_id;
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encoded_data.unknown = nfc_data.user_memory.unknown;
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encoded_data.hash = nfc_data.user_memory.hash;
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encoded_data.application_area = nfc_data.user_memory.application_area;
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encoded_data.locked_hash = nfc_data.user_memory.locked_hash;
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memcpy(encoded_data.uuid.data(), nfc_data.uuid.data(), 8);
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encoded_data.model_info = nfc_data.user_memory.model_info;
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encoded_data.keygen_salt = nfc_data.user_memory.keygen_salt;
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encoded_data.dynamic_lock = nfc_data.dynamic_lock;
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encoded_data.CFG0 = nfc_data.CFG0;
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encoded_data.CFG1 = nfc_data.CFG1;
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encoded_data.password = nfc_data.password;
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return encoded_data;
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}
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EncryptedNTAG215File EncodedDataToNfcData(const NTAG215File& encoded_data) {
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EncryptedNTAG215File nfc_data{};
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memcpy(nfc_data.uuid.data() + 0x8, encoded_data.uuid2.data(), 2);
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memcpy(nfc_data.uuid.data(), encoded_data.uuid.data(), 8);
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nfc_data.static_lock = encoded_data.static_lock;
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nfc_data.compability_container = encoded_data.compability_container;
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nfc_data.user_memory.unfixed_hash = encoded_data.unfixed_hash;
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nfc_data.user_memory.constant_value = encoded_data.constant_value;
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nfc_data.user_memory.write_counter = encoded_data.write_counter;
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nfc_data.user_memory.settings = encoded_data.settings;
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nfc_data.user_memory.owner_mii = encoded_data.owner_mii;
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nfc_data.user_memory.title_id = encoded_data.title_id;
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nfc_data.user_memory.applicaton_write_counter = encoded_data.applicaton_write_counter;
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nfc_data.user_memory.application_area_id = encoded_data.application_area_id;
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nfc_data.user_memory.unknown = encoded_data.unknown;
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nfc_data.user_memory.hash = encoded_data.hash;
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nfc_data.user_memory.application_area = encoded_data.application_area;
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nfc_data.user_memory.locked_hash = encoded_data.locked_hash;
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nfc_data.user_memory.model_info = encoded_data.model_info;
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nfc_data.user_memory.keygen_salt = encoded_data.keygen_salt;
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nfc_data.dynamic_lock = encoded_data.dynamic_lock;
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nfc_data.CFG0 = encoded_data.CFG0;
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nfc_data.CFG1 = encoded_data.CFG1;
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nfc_data.password = encoded_data.password;
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return nfc_data;
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}
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u32 GetTagPassword(const TagUuid& uuid) {
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// Verifiy that the generated password is correct
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u32 password = 0xAA ^ (uuid[1] ^ uuid[3]);
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password &= (0x55 ^ (uuid[2] ^ uuid[4])) << 8;
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password &= (0xAA ^ (uuid[3] ^ uuid[5])) << 16;
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password &= (0x55 ^ (uuid[4] ^ uuid[6])) << 24;
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return password;
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}
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HashSeed GetSeed(const NTAG215File& data) {
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HashSeed seed{
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.data =
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{
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.magic = data.write_counter,
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.padding = {},
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.uuid1 = {},
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.uuid2 = {},
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.keygen_salt = data.keygen_salt,
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},
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};
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// Copy the first 8 bytes of uuid
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memcpy(seed.data.uuid1.data(), data.uuid.data(), sizeof(seed.data.uuid1));
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memcpy(seed.data.uuid2.data(), data.uuid.data(), sizeof(seed.data.uuid2));
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return seed;
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}
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void PreGenerateKey(const InternalKey& key, const HashSeed& seed, u8* output,
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std::size_t& outputLen) {
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std::size_t index = 0;
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// Copy whole type string
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memccpy(output + index, key.type_string.data(), '\0', key.type_string.size());
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index += key.type_string.size();
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// Append (16 - magic_length) from the input seed
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std::size_t seedPart1Len = 16 - key.magic_length;
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memcpy(output + index, &seed, seedPart1Len);
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index += seedPart1Len;
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// Append all bytes from magicBytes
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memcpy(output + index, &key.magic_bytes, key.magic_length);
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index += key.magic_length;
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// Seed 16 bytes at +0x10
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memcpy(output + index, &seed.raw[0x10], 16);
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index += 16;
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// 32 bytes at +0x20 from input seed xored with xor pad
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for (std::size_t i = 0; i < 32; i++)
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output[index + i] = seed.raw[i + 32] ^ key.xor_pad[i];
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index += 32;
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outputLen = index;
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}
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void CryptoInit(CryptoCtx& ctx, mbedtls_md_context_t& hmac_ctx, const HmacKey& hmac_key,
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const u8* seed, std::size_t seed_size) {
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// Initialize context
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ctx.used = false;
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ctx.counter = 0;
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ctx.buffer_size = sizeof(ctx.counter) + seed_size;
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memcpy(ctx.buffer.data() + sizeof(u16), seed, seed_size);
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// Initialize HMAC context
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mbedtls_md_init(&hmac_ctx);
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mbedtls_md_setup(&hmac_ctx, mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), 1);
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mbedtls_md_hmac_starts(&hmac_ctx, hmac_key.data(), hmac_key.size());
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}
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void CryptoStep(CryptoCtx& ctx, mbedtls_md_context_t& hmac_ctx, DrgbOutput& output) {
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// If used at least once, reinitialize the HMAC
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if (ctx.used) {
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mbedtls_md_hmac_reset(&hmac_ctx);
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}
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ctx.used = true;
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// Store counter in big endian, and increment it
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ctx.buffer[0] = static_cast<u8>(ctx.counter >> 8);
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ctx.buffer[1] = static_cast<u8>(ctx.counter >> 0);
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ctx.counter++;
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// Do HMAC magic
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mbedtls_md_hmac_update(&hmac_ctx, reinterpret_cast<const unsigned char*>(ctx.buffer.data()),
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ctx.buffer_size);
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mbedtls_md_hmac_finish(&hmac_ctx, output.data());
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}
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DerivedKeys GenerateKey(const InternalKey& key, const NTAG215File& data) {
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constexpr std::size_t OUTPUT_SIZE = 512;
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const auto seed = GetSeed(data);
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// Generate internal seed
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u8 internal_key[OUTPUT_SIZE];
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std::size_t internal_key_lenght = 0;
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PreGenerateKey(key, seed, internal_key, internal_key_lenght);
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// Initialize context
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CryptoCtx ctx{};
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mbedtls_md_context_t hmac_ctx;
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||||||
|
CryptoInit(ctx, hmac_ctx, key.hmac_key, internal_key, internal_key_lenght);
|
||||||
|
|
||||||
|
// Generate derived keys
|
||||||
|
DerivedKeys derived_keys{};
|
||||||
|
std::array<DrgbOutput, 2> temp{};
|
||||||
|
CryptoStep(ctx, hmac_ctx, temp[0]);
|
||||||
|
CryptoStep(ctx, hmac_ctx, temp[1]);
|
||||||
|
memcpy(&derived_keys, temp.data(), sizeof(DerivedKeys));
|
||||||
|
|
||||||
|
// Cleanup context
|
||||||
|
mbedtls_md_free(&hmac_ctx);
|
||||||
|
|
||||||
|
return derived_keys;
|
||||||
|
}
|
||||||
|
|
||||||
|
void Cipher(const DerivedKeys& keys, const NTAG215File& in_data, NTAG215File& out_data) {
|
||||||
|
mbedtls_aes_context aes;
|
||||||
|
std::size_t nc_off = 0;
|
||||||
|
std::array<u8, 0x10> nonce_counter{};
|
||||||
|
std::array<u8, 0x10> stream_block{};
|
||||||
|
|
||||||
|
mbedtls_aes_setkey_enc(&aes, keys.aes_key.data(), 128);
|
||||||
|
memcpy(nonce_counter.data(), keys.aes_iv.data(), sizeof(nonce_counter));
|
||||||
|
|
||||||
|
std::array<u8, sizeof(NTAG215File)> in_data_byes{};
|
||||||
|
std::array<u8, sizeof(NTAG215File)> out_data_bytes{};
|
||||||
|
memcpy(in_data_byes.data(), &in_data, sizeof(NTAG215File));
|
||||||
|
memcpy(out_data_bytes.data(), &out_data, sizeof(NTAG215File));
|
||||||
|
|
||||||
|
mbedtls_aes_crypt_ctr(&aes, 0x188, &nc_off, nonce_counter.data(), stream_block.data(),
|
||||||
|
in_data_byes.data() + 0x2c, out_data_bytes.data() + 0x2c);
|
||||||
|
|
||||||
|
memcpy(out_data_bytes.data(), in_data_byes.data(), 0x008);
|
||||||
|
// Data signature NOT copied
|
||||||
|
memcpy(out_data_bytes.data() + 0x028, in_data_byes.data() + 0x028, 0x004);
|
||||||
|
// Tag signature NOT copied
|
||||||
|
memcpy(out_data_bytes.data() + 0x1D4, in_data_byes.data() + 0x1D4, 0x048);
|
||||||
|
|
||||||
|
memcpy(&out_data, out_data_bytes.data(), sizeof(NTAG215File));
|
||||||
|
}
|
||||||
|
|
||||||
|
bool LoadKeys(InternalKey& locked_secret, InternalKey& unfixed_info) {
|
||||||
|
const auto yuzu_keys_dir = Common::FS::GetYuzuPath(Common::FS::YuzuPath::KeysDir);
|
||||||
|
|
||||||
|
const Common::FS::IOFile keys_file{yuzu_keys_dir / "key_retail.bin",
|
||||||
|
Common::FS::FileAccessMode::Read,
|
||||||
|
Common::FS::FileType::BinaryFile};
|
||||||
|
|
||||||
|
if (!keys_file.IsOpen()) {
|
||||||
|
LOG_ERROR(Core, "No keys detected");
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (keys_file.Read(unfixed_info) != 1) {
|
||||||
|
LOG_ERROR(Core, "Failed to read unfixed_info");
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
if (keys_file.Read(locked_secret) != 1) {
|
||||||
|
LOG_ERROR(Core, "Failed to read locked-secret");
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool DecodeAmiibo(const EncryptedNTAG215File& encrypted_tag_data, NTAG215File& tag_data) {
|
||||||
|
InternalKey locked_secret{};
|
||||||
|
InternalKey unfixed_info{};
|
||||||
|
|
||||||
|
if (!LoadKeys(locked_secret, unfixed_info)) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Generate keys
|
||||||
|
NTAG215File encoded_data = NfcDataToEncodedData(encrypted_tag_data);
|
||||||
|
const auto data_keys = GenerateKey(unfixed_info, encoded_data);
|
||||||
|
const auto tag_keys = GenerateKey(locked_secret, encoded_data);
|
||||||
|
|
||||||
|
// Decrypt
|
||||||
|
Cipher(data_keys, encoded_data, tag_data);
|
||||||
|
|
||||||
|
std::array<u8, sizeof(NTAG215File)> out{};
|
||||||
|
memcpy(out.data(), &tag_data, sizeof(NTAG215File));
|
||||||
|
|
||||||
|
// Regenerate tag HMAC. Note: order matters, data HMAC depends on tag HMAC!
|
||||||
|
mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), tag_keys.hmac_key.data(),
|
||||||
|
sizeof(HmacKey), out.data() + 0x1D4, 0x34, out.data() + HMAC_POS_TAG);
|
||||||
|
|
||||||
|
// Regenerate data HMAC
|
||||||
|
mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), data_keys.hmac_key.data(),
|
||||||
|
sizeof(HmacKey), out.data() + 0x29, 0x1DF, out.data() + HMAC_POS_DATA);
|
||||||
|
|
||||||
|
memcpy(&tag_data, out.data(), sizeof(NTAG215File));
|
||||||
|
|
||||||
|
if (memcmp(tag_data.unfixed_hash.data(), encrypted_tag_data.user_memory.unfixed_hash.data(),
|
||||||
|
32) != 0) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (memcmp(tag_data.locked_hash.data(), encrypted_tag_data.user_memory.locked_hash.data(),
|
||||||
|
32) != 0) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
bool EncodeAmiibo(const NTAG215File& tag_data, EncryptedNTAG215File& encrypted_tag_data) {
|
||||||
|
InternalKey locked_secret{};
|
||||||
|
InternalKey unfixed_info{};
|
||||||
|
|
||||||
|
if (!LoadKeys(locked_secret, unfixed_info)) {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Generate keys
|
||||||
|
const auto data_keys = GenerateKey(unfixed_info, tag_data);
|
||||||
|
const auto tag_keys = GenerateKey(locked_secret, tag_data);
|
||||||
|
|
||||||
|
std::array<u8, sizeof(NTAG215File)> plain{};
|
||||||
|
std::array<u8, sizeof(NTAG215File)> cipher{};
|
||||||
|
memcpy(plain.data(), &tag_data, sizeof(NTAG215File));
|
||||||
|
|
||||||
|
// Generate tag HMAC
|
||||||
|
mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), tag_keys.hmac_key.data(),
|
||||||
|
sizeof(HmacKey), plain.data() + 0x1D4, 0x34, cipher.data() + HMAC_POS_TAG);
|
||||||
|
|
||||||
|
// Init mbedtls HMAC context
|
||||||
|
mbedtls_md_context_t ctx;
|
||||||
|
mbedtls_md_init(&ctx);
|
||||||
|
mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), 1);
|
||||||
|
|
||||||
|
// Generate data HMAC
|
||||||
|
mbedtls_md_hmac_starts(&ctx, data_keys.hmac_key.data(), sizeof(HmacKey));
|
||||||
|
mbedtls_md_hmac_update(&ctx, plain.data() + 0x029, 0x18B); // Data
|
||||||
|
mbedtls_md_hmac_update(&ctx, cipher.data() + HMAC_POS_TAG, 0x20); // Tag HMAC
|
||||||
|
mbedtls_md_hmac_update(&ctx, plain.data() + 0x1D4, 0x34);
|
||||||
|
mbedtls_md_hmac_finish(&ctx, cipher.data() + HMAC_POS_DATA);
|
||||||
|
|
||||||
|
// HMAC cleanup
|
||||||
|
mbedtls_md_free(&ctx);
|
||||||
|
|
||||||
|
// Encrypt
|
||||||
|
NTAG215File encoded_tag_data{};
|
||||||
|
memcpy(&encoded_tag_data, cipher.data(), sizeof(NTAG215File));
|
||||||
|
Cipher(data_keys, tag_data, encoded_tag_data);
|
||||||
|
|
||||||
|
// Convert back to hardware
|
||||||
|
encrypted_tag_data = EncodedDataToNfcData(encoded_tag_data);
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
} // namespace Service::NFP::AmiiboCrypto
|
||||||
@ -0,0 +1,102 @@
|
|||||||
|
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
|
||||||
|
// SPDX-License-Identifier: GPL-3.0-or-later
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <array>
|
||||||
|
|
||||||
|
#include "core/hle/service/nfp/amiibo_types.h"
|
||||||
|
|
||||||
|
struct mbedtls_md_context_t;
|
||||||
|
|
||||||
|
namespace Service::NFP::AmiiboCrypto {
|
||||||
|
constexpr std::size_t HMAC_POS_DATA = 0x8;
|
||||||
|
constexpr std::size_t HMAC_POS_TAG = 0x1B4;
|
||||||
|
|
||||||
|
using HmacKey = std::array<u8, 0x10>;
|
||||||
|
using DrgbOutput = std::array<u8, 0x20>;
|
||||||
|
|
||||||
|
struct HashSeed {
|
||||||
|
union {
|
||||||
|
std::array<u8, 0x40> raw;
|
||||||
|
struct {
|
||||||
|
u16 magic;
|
||||||
|
std::array<u8, 0xE> padding;
|
||||||
|
std::array<u8, 0x8> uuid1;
|
||||||
|
std::array<u8, 0x8> uuid2;
|
||||||
|
std::array<u8, 0x20> keygen_salt;
|
||||||
|
} data;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
static_assert(sizeof(HashSeed) == 0x40, "HashSeed is an invalid size");
|
||||||
|
|
||||||
|
struct InternalKey {
|
||||||
|
HmacKey hmac_key;
|
||||||
|
std::array<char, 0xE> type_string;
|
||||||
|
u8 reserved;
|
||||||
|
u8 magic_length;
|
||||||
|
std::array<u8, 0x10> magic_bytes;
|
||||||
|
std::array<u8, 0x20> xor_pad;
|
||||||
|
};
|
||||||
|
static_assert(sizeof(InternalKey) == 0x50, "InternalKey is an invalid size");
|
||||||
|
static_assert(std::is_trivially_copyable_v<InternalKey>, "InternalKey must be trivially copyable.");
|
||||||
|
|
||||||
|
struct CryptoCtx {
|
||||||
|
std::array<char, 480> buffer;
|
||||||
|
bool used;
|
||||||
|
std::size_t buffer_size;
|
||||||
|
s16 counter;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct DerivedKeys {
|
||||||
|
std::array<u8, 0x10> aes_key;
|
||||||
|
std::array<u8, 0x10> aes_iv;
|
||||||
|
std::array<u8, 0x10> hmac_key;
|
||||||
|
};
|
||||||
|
static_assert(sizeof(DerivedKeys) == 0x30, "DerivedKeys is an invalid size");
|
||||||
|
|
||||||
|
/// Converts mii data from nintendo 3ds format to nintendo switch format
|
||||||
|
Service::Mii::MiiInfo AmiiboRegisterInfoToMii(const AmiiboRegisterInfo& register_info);
|
||||||
|
|
||||||
|
/// Validates that the amiibo file is not corrupted
|
||||||
|
bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file);
|
||||||
|
|
||||||
|
/// Converts from encrypted file format to encoded file format
|
||||||
|
NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data);
|
||||||
|
|
||||||
|
/// Converts from encoded file format to encrypted file format
|
||||||
|
EncryptedNTAG215File EncodedDataToNfcData(const NTAG215File& encoded_data);
|
||||||
|
|
||||||
|
/// Returns password needed to allow write access to protected memory
|
||||||
|
u32 GetTagPassword(const TagUuid& uuid);
|
||||||
|
|
||||||
|
// Generates Seed needed for key derivation
|
||||||
|
HashSeed GetSeed(const NTAG215File& data);
|
||||||
|
|
||||||
|
// Middle step on the generation of derived keys
|
||||||
|
void PreGenerateKey(const InternalKey& key, const HashSeed& seed, u8* output,
|
||||||
|
std::size_t& outputLen);
|
||||||
|
|
||||||
|
// Initializes mbedtls context
|
||||||
|
void CryptoInit(CryptoCtx& ctx, mbedtls_md_context_t& hmac_ctx, const HmacKey& hmac_key,
|
||||||
|
const u8* seed, std::size_t seed_size);
|
||||||
|
|
||||||
|
// Feeds data to mbedtls context to generate the derived key
|
||||||
|
void CryptoStep(CryptoCtx& ctx, mbedtls_md_context_t& hmac_ctx, DrgbOutput& output);
|
||||||
|
|
||||||
|
// Generates the derived key from amiibo data
|
||||||
|
DerivedKeys GenerateKey(const InternalKey& key, const NTAG215File& data);
|
||||||
|
|
||||||
|
// Encodes or decodes amiibo data
|
||||||
|
void Cipher(const DerivedKeys& keys, const NTAG215File& in_data, NTAG215File& out_data);
|
||||||
|
|
||||||
|
/// Loads both amiibo keys from key_retail.bin
|
||||||
|
bool LoadKeys(InternalKey& locked_secret, InternalKey& unfixed_info);
|
||||||
|
|
||||||
|
/// Decodes encripted amiibo data returns true if output is valid
|
||||||
|
bool DecodeAmiibo(const EncryptedNTAG215File& encrypted_tag_data, NTAG215File& tag_data);
|
||||||
|
|
||||||
|
/// Encodes plain amiibo data returns true if output is valid
|
||||||
|
bool EncodeAmiibo(const NTAG215File& tag_data, EncryptedNTAG215File& encrypted_tag_data);
|
||||||
|
|
||||||
|
} // namespace Service::NFP::AmiiboCrypto
|
||||||
@ -0,0 +1,304 @@
|
|||||||
|
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
|
||||||
|
// SPDX-License-Identifier: GPL-3.0-or-later
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <array>
|
||||||
|
|
||||||
|
namespace Service::NFP {
|
||||||
|
enum class ServiceType : u32 {
|
||||||
|
User,
|
||||||
|
Debug,
|
||||||
|
System,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum class State : u32 {
|
||||||
|
NonInitialized,
|
||||||
|
Initialized,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum class DeviceState : u32 {
|
||||||
|
Initialized,
|
||||||
|
SearchingForTag,
|
||||||
|
TagFound,
|
||||||
|
TagRemoved,
|
||||||
|
TagMounted,
|
||||||
|
Unaviable,
|
||||||
|
Finalized,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum class ModelType : u32 {
|
||||||
|
Amiibo,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum class MountTarget : u32 {
|
||||||
|
Rom,
|
||||||
|
Ram,
|
||||||
|
All,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum class AmiiboType : u8 {
|
||||||
|
Figure,
|
||||||
|
Card,
|
||||||
|
Yarn,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum class AmiiboSeries : u8 {
|
||||||
|
SuperSmashBros,
|
||||||
|
SuperMario,
|
||||||
|
ChibiRobo,
|
||||||
|
YoshiWoollyWorld,
|
||||||
|
Splatoon,
|
||||||
|
AnimalCrossing,
|
||||||
|
EightBitMario,
|
||||||
|
Skylanders,
|
||||||
|
Unknown8,
|
||||||
|
TheLegendOfZelda,
|
||||||
|
ShovelKnight,
|
||||||
|
Unknown11,
|
||||||
|
Kiby,
|
||||||
|
Pokemon,
|
||||||
|
MarioSportsSuperstars,
|
||||||
|
MonsterHunter,
|
||||||
|
BoxBoy,
|
||||||
|
Pikmin,
|
||||||
|
FireEmblem,
|
||||||
|
Metroid,
|
||||||
|
Others,
|
||||||
|
MegaMan,
|
||||||
|
Diablo,
|
||||||
|
};
|
||||||
|
|
||||||
|
using TagUuid = std::array<u8, 10>;
|
||||||
|
using HashData = std::array<u8, 0x20>;
|
||||||
|
using ApplicationArea = std::array<u8, 0xD8>;
|
||||||
|
|
||||||
|
struct AmiiboDate {
|
||||||
|
union {
|
||||||
|
u16_be raw{};
|
||||||
|
|
||||||
|
BitField<0, 5, u16> day;
|
||||||
|
BitField<5, 4, u16> month;
|
||||||
|
BitField<9, 7, u16> year;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
static_assert(sizeof(AmiiboDate) == 2, "AmiiboDate is an invalid size");
|
||||||
|
|
||||||
|
struct Settings {
|
||||||
|
union {
|
||||||
|
u8 raw{};
|
||||||
|
|
||||||
|
BitField<4, 1, u8> amiibo_initialized;
|
||||||
|
BitField<5, 1, u8> appdata_initialized;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
static_assert(sizeof(Settings) == 1, "AmiiboDate is an invalid size");
|
||||||
|
|
||||||
|
struct AmiiboSettings {
|
||||||
|
Settings settings;
|
||||||
|
u8 country_code_id;
|
||||||
|
u16_be crc_counter; // Incremented each time crc is changed
|
||||||
|
AmiiboDate init_date;
|
||||||
|
AmiiboDate write_date;
|
||||||
|
u32_be crc;
|
||||||
|
std::array<u16_be, 0xA> amiibo_name; // UTF-16 text
|
||||||
|
};
|
||||||
|
static_assert(sizeof(AmiiboSettings) == 0x20, "AmiiboSettings is an invalid size");
|
||||||
|
|
||||||
|
struct AmiiboModelInfo {
|
||||||
|
u16 character_id;
|
||||||
|
u8 character_variant;
|
||||||
|
AmiiboType amiibo_type;
|
||||||
|
u16 model_number;
|
||||||
|
AmiiboSeries series;
|
||||||
|
u8 constant_value; // Must be 02
|
||||||
|
INSERT_PADDING_BYTES(0x4); // Unknown
|
||||||
|
};
|
||||||
|
static_assert(sizeof(AmiiboModelInfo) == 0xC, "AmiiboModelInfo is an invalid size");
|
||||||
|
|
||||||
|
struct NTAG215Password {
|
||||||
|
u32 PWD; // Password to allow write access
|
||||||
|
u16 PACK; // Password acknowledge reply
|
||||||
|
u16 RFUI; // Reserved for future use
|
||||||
|
};
|
||||||
|
static_assert(sizeof(NTAG215Password) == 0x8, "NTAG215Password is an invalid size");
|
||||||
|
|
||||||
|
// Based on citra HLE::Applets::MiiData and PretendoNetwork.
|
||||||
|
// https://github.com/citra-emu/citra/blob/master/src/core/hle/applets/mii_selector.h#L48
|
||||||
|
// https://github.com/PretendoNetwork/mii-js/blob/master/mii.js#L299
|
||||||
|
#pragma pack(1)
|
||||||
|
struct AmiiboRegisterInfo {
|
||||||
|
u32_be mii_id;
|
||||||
|
u64_be system_id;
|
||||||
|
u32_be specialness_and_creation_date;
|
||||||
|
std::array<u8, 0x6> creator_mac;
|
||||||
|
u16_be padding;
|
||||||
|
union {
|
||||||
|
u16 raw;
|
||||||
|
|
||||||
|
BitField<0, 1, u16> gender;
|
||||||
|
BitField<1, 4, u16> birth_month;
|
||||||
|
BitField<5, 5, u16> birth_day;
|
||||||
|
BitField<10, 4, u16> favorite_color;
|
||||||
|
BitField<14, 1, u16> favorite;
|
||||||
|
} mii_information;
|
||||||
|
std::array<char16_t, 0xA> mii_name;
|
||||||
|
u8 height;
|
||||||
|
u8 build;
|
||||||
|
union {
|
||||||
|
u8 raw;
|
||||||
|
|
||||||
|
BitField<0, 1, u8> disable_sharing;
|
||||||
|
BitField<1, 4, u8> face_shape;
|
||||||
|
BitField<5, 3, u8> skin_color;
|
||||||
|
} appearance_bits1;
|
||||||
|
union {
|
||||||
|
u8 raw;
|
||||||
|
|
||||||
|
BitField<0, 4, u8> wrinkles;
|
||||||
|
BitField<4, 4, u8> makeup;
|
||||||
|
} appearance_bits2;
|
||||||
|
u8 hair_style;
|
||||||
|
union {
|
||||||
|
u8 raw;
|
||||||
|
|
||||||
|
BitField<0, 3, u8> hair_color;
|
||||||
|
BitField<3, 1, u8> flip_hair;
|
||||||
|
} appearance_bits3;
|
||||||
|
union {
|
||||||
|
u32 raw;
|
||||||
|
|
||||||
|
BitField<0, 6, u32> eye_type;
|
||||||
|
BitField<6, 3, u32> eye_color;
|
||||||
|
BitField<9, 4, u32> eye_scale;
|
||||||
|
BitField<13, 3, u32> eye_vertical_stretch;
|
||||||
|
BitField<16, 5, u32> eye_rotation;
|
||||||
|
BitField<21, 4, u32> eye_spacing;
|
||||||
|
BitField<25, 5, u32> eye_y_position;
|
||||||
|
} appearance_bits4;
|
||||||
|
union {
|
||||||
|
u32 raw;
|
||||||
|
|
||||||
|
BitField<0, 5, u32> eyebrow_style;
|
||||||
|
BitField<5, 3, u32> eyebrow_color;
|
||||||
|
BitField<8, 4, u32> eyebrow_scale;
|
||||||
|
BitField<12, 3, u32> eyebrow_yscale;
|
||||||
|
BitField<16, 4, u32> eyebrow_rotation;
|
||||||
|
BitField<21, 4, u32> eyebrow_spacing;
|
||||||
|
BitField<25, 5, u32> eyebrow_y_position;
|
||||||
|
} appearance_bits5;
|
||||||
|
union {
|
||||||
|
u16 raw;
|
||||||
|
|
||||||
|
BitField<0, 5, u16> nose_type;
|
||||||
|
BitField<5, 4, u16> nose_scale;
|
||||||
|
BitField<9, 5, u16> nose_y_position;
|
||||||
|
} appearance_bits6;
|
||||||
|
union {
|
||||||
|
u16 raw;
|
||||||
|
|
||||||
|
BitField<0, 6, u16> mouth_type;
|
||||||
|
BitField<6, 3, u16> mouth_color;
|
||||||
|
BitField<9, 4, u16> mouth_scale;
|
||||||
|
BitField<13, 3, u16> mouth_horizontal_stretch;
|
||||||
|
} appearance_bits7;
|
||||||
|
union {
|
||||||
|
u8 raw;
|
||||||
|
|
||||||
|
BitField<0, 5, u8> mouth_y_position;
|
||||||
|
BitField<5, 3, u8> mustache_type;
|
||||||
|
} appearance_bits8;
|
||||||
|
u8 allow_copying;
|
||||||
|
union {
|
||||||
|
u16 raw;
|
||||||
|
|
||||||
|
BitField<0, 3, u16> bear_type;
|
||||||
|
BitField<3, 3, u16> facial_hair_color;
|
||||||
|
BitField<6, 4, u16> mustache_scale;
|
||||||
|
BitField<10, 5, u16> mustache_y_position;
|
||||||
|
} appearance_bits9;
|
||||||
|
union {
|
||||||
|
u16 raw;
|
||||||
|
|
||||||
|
BitField<0, 4, u16> glasses_type;
|
||||||
|
BitField<4, 3, u16> glasses_color;
|
||||||
|
BitField<7, 4, u16> glasses_scale;
|
||||||
|
BitField<11, 5, u16> glasses_y_position;
|
||||||
|
} appearance_bits10;
|
||||||
|
union {
|
||||||
|
u16 raw;
|
||||||
|
|
||||||
|
BitField<0, 1, u16> mole_enabled;
|
||||||
|
BitField<1, 4, u16> mole_scale;
|
||||||
|
BitField<5, 5, u16> mole_x_position;
|
||||||
|
BitField<10, 5, u16> mole_y_position;
|
||||||
|
} appearance_bits11;
|
||||||
|
|
||||||
|
std::array<u16_le, 0xA> author_name;
|
||||||
|
INSERT_PADDING_BYTES(0x4);
|
||||||
|
};
|
||||||
|
static_assert(sizeof(AmiiboRegisterInfo) == 0x60, "AmiiboRegisterInfo is an invalid size");
|
||||||
|
|
||||||
|
struct EncryptedAmiiboFile {
|
||||||
|
u8 constant_value; // Must be A5
|
||||||
|
u16 write_counter; // Number of times the amiibo has been written?
|
||||||
|
INSERT_PADDING_BYTES(0x1); // Unknown 1
|
||||||
|
AmiiboSettings settings; // Encrypted amiibo settings
|
||||||
|
HashData locked_hash; // Hash
|
||||||
|
AmiiboModelInfo model_info; // Encrypted amiibo model info
|
||||||
|
HashData keygen_salt; // Salt
|
||||||
|
HashData unfixed_hash; // Hash
|
||||||
|
AmiiboRegisterInfo owner_mii; // Encrypted Mii data
|
||||||
|
u64_be title_id; // Encrypted Game id
|
||||||
|
u16_be applicaton_write_counter; // Encrypted Counter
|
||||||
|
u32_be application_area_id; // Encrypted Game id
|
||||||
|
std::array<u8, 0x2> unknown;
|
||||||
|
HashData hash; // Probably a SHA256-HMAC hash?
|
||||||
|
ApplicationArea application_area; // Encrypted Game data
|
||||||
|
};
|
||||||
|
static_assert(sizeof(EncryptedAmiiboFile) == 0x1F8, "AmiiboFile is an invalid size");
|
||||||
|
|
||||||
|
struct NTAG215File {
|
||||||
|
std::array<u8, 0x2> uuid2;
|
||||||
|
u16 static_lock; // Set defined pages as read only
|
||||||
|
u32 compability_container; // Defines available memory
|
||||||
|
HashData unfixed_hash; // Hash
|
||||||
|
u8 constant_value; // Must be A5
|
||||||
|
u16 write_counter; // Number of times the amiibo has been written?
|
||||||
|
INSERT_PADDING_BYTES(0x1); // Unknown 1
|
||||||
|
AmiiboSettings settings;
|
||||||
|
AmiiboRegisterInfo owner_mii; // Encrypted Mii data
|
||||||
|
u64_be title_id;
|
||||||
|
u16_be applicaton_write_counter; // Encrypted Counter
|
||||||
|
u32_be application_area_id;
|
||||||
|
std::array<u8, 0x2> unknown;
|
||||||
|
HashData hash; // Probably a SHA256-HMAC hash?
|
||||||
|
ApplicationArea application_area; // Encrypted Game data
|
||||||
|
HashData locked_hash; // Hash
|
||||||
|
std::array<u8, 0x8> uuid;
|
||||||
|
AmiiboModelInfo model_info;
|
||||||
|
HashData keygen_salt; // Salt
|
||||||
|
u32 dynamic_lock; // Dynamic lock
|
||||||
|
u32 CFG0; // Defines memory protected by password
|
||||||
|
u32 CFG1; // Defines number of verification attempts
|
||||||
|
NTAG215Password password; // Password data
|
||||||
|
};
|
||||||
|
static_assert(sizeof(NTAG215File) == 0x21C, "NTAG215File is an invalid size");
|
||||||
|
static_assert(std::is_trivially_copyable_v<NTAG215File>, "NTAG215File must be trivially copyable.");
|
||||||
|
#pragma pack()
|
||||||
|
|
||||||
|
struct EncryptedNTAG215File {
|
||||||
|
TagUuid uuid; // Unique serial number
|
||||||
|
u16 static_lock; // Set defined pages as read only
|
||||||
|
u32 compability_container; // Defines available memory
|
||||||
|
EncryptedAmiiboFile user_memory; // Writable data
|
||||||
|
u32 dynamic_lock; // Dynamic lock
|
||||||
|
u32 CFG0; // Defines memory protected by password
|
||||||
|
u32 CFG1; // Defines number of verification attempts
|
||||||
|
NTAG215Password password; // Password data
|
||||||
|
};
|
||||||
|
static_assert(sizeof(EncryptedNTAG215File) == 0x21C, "EncryptedNTAG215File is an invalid size");
|
||||||
|
static_assert(std::is_trivially_copyable_v<EncryptedNTAG215File>,
|
||||||
|
"EncryptedNTAG215File must be trivially copyable.");
|
||||||
|
|
||||||
|
} // namespace Service::NFP
|
||||||
Loading…
Reference in New Issue