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core: nfp: Implement amiibo encryption

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This commit is contained in:
german77 2022-02-13 11:54:39 -06:00
parent 4ffbbc5348
commit 848f69eb19
7 changed files with 1235 additions and 284 deletions
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3
src/core/CMakeLists.txt
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@ -525,6 +525,9 @@ add_library(core STATIC
hle/service/ncm/ncm.h
hle/service/nfc/nfc.cpp
hle/service/nfc/nfc.h
hle/service/nfp/amiibo_crypto.cpp
hle/service/nfp/amiibo_crypto.h
hle/service/nfp/amiibo_types.h
hle/service/nfp/nfp.cpp
hle/service/nfp/nfp.h
hle/service/nfp/nfp_user.cpp

455
src/core/hle/service/nfp/amiibo_crypto.cpp Normal file
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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2017 socram8888/amiitool
// SPDX-License-Identifier: MIT
#include <array>
#include <mbedtls/aes.h>
#include <mbedtls/hmac_drbg.h>
#include "common/fs/file.h"
#include "common/fs/path_util.h"
#include "common/logging/log.h"
#include "core/hle/service/mii/mii_manager.h"
#include "core/hle/service/nfp/amiibo_crypto.h"
namespace Service::NFP::AmiiboCrypto {
Service::Mii::MiiInfo AmiiboRegisterInfoToMii(const AmiiboRegisterInfo& mii_info) {
Service::Mii::MiiManager manager;
auto mii = manager.BuildDefault(0);
// TODO: We are ignoring a bunch of data from the amiibo mii
mii.gender = static_cast<u8>(mii_info.mii_information.gender);
mii.favorite_color = static_cast<u8>(mii_info.mii_information.favorite_color);
memcpy(mii.name.data(), mii_info.mii_name.data(), 10);
mii.height = mii_info.height;
mii.build = mii_info.build;
mii.faceline_type = mii_info.appearance_bits1.face_shape;
mii.faceline_color = mii_info.appearance_bits1.skin_color;
mii.faceline_wrinkle = mii_info.appearance_bits2.wrinkles;
mii.faceline_make = mii_info.appearance_bits2.makeup;
mii.hair_type = mii_info.hair_style;
mii.hair_color = mii_info.appearance_bits3.hair_color;
mii.hair_flip = mii_info.appearance_bits3.flip_hair;
mii.eye_type = static_cast<u8>(mii_info.appearance_bits4.eye_type);
mii.eye_color = static_cast<u8>(mii_info.appearance_bits4.eye_color);
mii.eye_scale = static_cast<u8>(mii_info.appearance_bits4.eye_scale);
mii.eye_aspect = static_cast<u8>(mii_info.appearance_bits4.eye_vertical_stretch);
mii.eye_rotate = static_cast<u8>(mii_info.appearance_bits4.eye_rotation);
mii.eye_x = static_cast<u8>(mii_info.appearance_bits4.eye_spacing);
mii.eye_y = static_cast<u8>(mii_info.appearance_bits4.eye_y_position);
mii.eyebrow_type = static_cast<u8>(mii_info.appearance_bits5.eyebrow_style);
mii.eyebrow_color = static_cast<u8>(mii_info.appearance_bits5.eyebrow_color);
mii.eyebrow_scale = static_cast<u8>(mii_info.appearance_bits5.eyebrow_scale);
mii.eyebrow_aspect = static_cast<u8>(mii_info.appearance_bits5.eyebrow_yscale);
mii.eyebrow_rotate = static_cast<u8>(mii_info.appearance_bits5.eyebrow_rotation);
mii.eyebrow_x = static_cast<u8>(mii_info.appearance_bits5.eyebrow_spacing);
mii.eyebrow_y = static_cast<u8>(mii_info.appearance_bits5.eyebrow_y_position);
mii.nose_type = static_cast<u8>(mii_info.appearance_bits6.nose_type);
mii.nose_scale = static_cast<u8>(mii_info.appearance_bits6.nose_scale);
mii.nose_y = static_cast<u8>(mii_info.appearance_bits6.nose_y_position);
mii.mouth_type = static_cast<u8>(mii_info.appearance_bits7.mouth_type);
mii.mouth_color = static_cast<u8>(mii_info.appearance_bits7.mouth_color);
mii.mouth_scale = static_cast<u8>(mii_info.appearance_bits7.mouth_scale);
mii.mouth_aspect = static_cast<u8>(mii_info.appearance_bits7.mouth_horizontal_stretch);
mii.mouth_y = static_cast<u8>(mii_info.appearance_bits8.mouth_y_position);
mii.mustache_type = static_cast<u8>(mii_info.appearance_bits8.mustache_type);
mii.mustache_scale = static_cast<u8>(mii_info.appearance_bits9.mustache_scale);
mii.mustache_y = static_cast<u8>(mii_info.appearance_bits9.mustache_y_position);
mii.beard_type = static_cast<u8>(mii_info.appearance_bits9.bear_type);
mii.beard_color = static_cast<u8>(mii_info.appearance_bits9.facial_hair_color);
mii.glasses_type = static_cast<u8>(mii_info.appearance_bits10.glasses_type);
mii.glasses_color = static_cast<u8>(mii_info.appearance_bits10.glasses_color);
mii.glasses_scale = static_cast<u8>(mii_info.appearance_bits10.glasses_scale);
mii.glasses_y = static_cast<u8>(mii_info.appearance_bits10.glasses_y_position);
mii.mole_type = static_cast<u8>(mii_info.appearance_bits11.mole_enabled);
mii.mole_scale = static_cast<u8>(mii_info.appearance_bits11.mole_scale);
mii.mole_x = static_cast<u8>(mii_info.appearance_bits11.mole_x_position);
mii.mole_y = static_cast<u8>(mii_info.appearance_bits11.mole_y_position);
// TODO: Validate mii data
return mii;
}
bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
const auto& amiibo_data = ntag_file.user_memory;
LOG_DEBUG(Service_NFP, "uuid_lock=0x{0:x}", ntag_file.static_lock);
LOG_DEBUG(Service_NFP, "compability_container=0x{0:x}", ntag_file.compability_container);
LOG_INFO(Service_NFP, "write_count={}", amiibo_data.write_counter);
LOG_INFO(Service_NFP, "character_id=0x{0:x}", amiibo_data.model_info.character_id);
LOG_INFO(Service_NFP, "character_variant={}", amiibo_data.model_info.character_variant);
LOG_INFO(Service_NFP, "amiibo_type={}", amiibo_data.model_info.amiibo_type);
LOG_INFO(Service_NFP, "model_number=0x{0:x}", amiibo_data.model_info.model_number);
LOG_INFO(Service_NFP, "series={}", amiibo_data.model_info.series);
LOG_DEBUG(Service_NFP, "fixed_value=0x{0:x}", amiibo_data.model_info.constant_value);
LOG_DEBUG(Service_NFP, "tag_dynamic_lock=0x{0:x}", ntag_file.dynamic_lock);
LOG_DEBUG(Service_NFP, "tag_CFG0=0x{0:x}", ntag_file.CFG0);
LOG_DEBUG(Service_NFP, "tag_CFG1=0x{0:x}", ntag_file.CFG1);
// Validate UUID
constexpr u8 CT = 0x88; // As defined in `ISO / IEC 14443 - 3`
if ((CT ^ ntag_file.uuid[0] ^ ntag_file.uuid[1] ^ ntag_file.uuid[2]) != ntag_file.uuid[3]) {
return false;
}
if ((ntag_file.uuid[4] ^ ntag_file.uuid[5] ^ ntag_file.uuid[6] ^ ntag_file.uuid[7]) !=
ntag_file.uuid[8]) {
return false;
}
// Check against all know constants on an amiibo binary
if (ntag_file.static_lock != 0xE00F) {
return false;
}
if (ntag_file.compability_container != 0xEEFF10F1U) {
return false;
}
if (amiibo_data.constant_value != 0xA5) {
return false;
}
if (amiibo_data.model_info.constant_value != 0x02) {
return false;
}
if ((ntag_file.dynamic_lock & 0xFFFFFF) != 0x0F0001) {
return false;
}
if (ntag_file.CFG0 != 0x04000000U) {
return false;
}
if (ntag_file.CFG1 != 0x5F) {
return false;
}
return true;
}
NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data) {
NTAG215File encoded_data{};
memcpy(encoded_data.uuid2.data(), nfc_data.uuid.data() + 0x8, 2);
encoded_data.static_lock = nfc_data.static_lock;
encoded_data.compability_container = nfc_data.compability_container;
encoded_data.unfixed_hash = nfc_data.user_memory.unfixed_hash;
encoded_data.constant_value = nfc_data.user_memory.constant_value;
encoded_data.write_counter = nfc_data.user_memory.write_counter;
encoded_data.settings = nfc_data.user_memory.settings;
encoded_data.owner_mii = nfc_data.user_memory.owner_mii;
encoded_data.title_id = nfc_data.user_memory.title_id;
encoded_data.applicaton_write_counter = nfc_data.user_memory.applicaton_write_counter;
encoded_data.application_area_id = nfc_data.user_memory.application_area_id;
encoded_data.unknown = nfc_data.user_memory.unknown;
encoded_data.hash = nfc_data.user_memory.hash;
encoded_data.application_area = nfc_data.user_memory.application_area;
encoded_data.locked_hash = nfc_data.user_memory.locked_hash;
memcpy(encoded_data.uuid.data(), nfc_data.uuid.data(), 8);
encoded_data.model_info = nfc_data.user_memory.model_info;
encoded_data.keygen_salt = nfc_data.user_memory.keygen_salt;
encoded_data.dynamic_lock = nfc_data.dynamic_lock;
encoded_data.CFG0 = nfc_data.CFG0;
encoded_data.CFG1 = nfc_data.CFG1;
encoded_data.password = nfc_data.password;
return encoded_data;
}
EncryptedNTAG215File EncodedDataToNfcData(const NTAG215File& encoded_data) {
EncryptedNTAG215File nfc_data{};
memcpy(nfc_data.uuid.data() + 0x8, encoded_data.uuid2.data(), 2);
memcpy(nfc_data.uuid.data(), encoded_data.uuid.data(), 8);
nfc_data.static_lock = encoded_data.static_lock;
nfc_data.compability_container = encoded_data.compability_container;
nfc_data.user_memory.unfixed_hash = encoded_data.unfixed_hash;
nfc_data.user_memory.constant_value = encoded_data.constant_value;
nfc_data.user_memory.write_counter = encoded_data.write_counter;
nfc_data.user_memory.settings = encoded_data.settings;
nfc_data.user_memory.owner_mii = encoded_data.owner_mii;
nfc_data.user_memory.title_id = encoded_data.title_id;
nfc_data.user_memory.applicaton_write_counter = encoded_data.applicaton_write_counter;
nfc_data.user_memory.application_area_id = encoded_data.application_area_id;
nfc_data.user_memory.unknown = encoded_data.unknown;
nfc_data.user_memory.hash = encoded_data.hash;
nfc_data.user_memory.application_area = encoded_data.application_area;
nfc_data.user_memory.locked_hash = encoded_data.locked_hash;
nfc_data.user_memory.model_info = encoded_data.model_info;
nfc_data.user_memory.keygen_salt = encoded_data.keygen_salt;
nfc_data.dynamic_lock = encoded_data.dynamic_lock;
nfc_data.CFG0 = encoded_data.CFG0;
nfc_data.CFG1 = encoded_data.CFG1;
nfc_data.password = encoded_data.password;
return nfc_data;
}
u32 GetTagPassword(const TagUuid& uuid) {
// Verifiy that the generated password is correct
u32 password = 0xAA ^ (uuid[1] ^ uuid[3]);
password &= (0x55 ^ (uuid[2] ^ uuid[4])) << 8;
password &= (0xAA ^ (uuid[3] ^ uuid[5])) << 16;
password &= (0x55 ^ (uuid[4] ^ uuid[6])) << 24;
return password;
}
HashSeed GetSeed(const NTAG215File& data) {
HashSeed seed{
.data =
{
.magic = data.write_counter,
.padding = {},
.uuid1 = {},
.uuid2 = {},
.keygen_salt = data.keygen_salt,
},
};
// Copy the first 8 bytes of uuid
memcpy(seed.data.uuid1.data(), data.uuid.data(), sizeof(seed.data.uuid1));
memcpy(seed.data.uuid2.data(), data.uuid.data(), sizeof(seed.data.uuid2));
return seed;
}
void PreGenerateKey(const InternalKey& key, const HashSeed& seed, u8* output,
std::size_t& outputLen) {
std::size_t index = 0;
// Copy whole type string
memccpy(output + index, key.type_string.data(), '\0', key.type_string.size());
index += key.type_string.size();
// Append (16 - magic_length) from the input seed
std::size_t seedPart1Len = 16 - key.magic_length;
memcpy(output + index, &seed, seedPart1Len);
index += seedPart1Len;
// Append all bytes from magicBytes
memcpy(output + index, &key.magic_bytes, key.magic_length);
index += key.magic_length;
// Seed 16 bytes at +0x10
memcpy(output + index, &seed.raw[0x10], 16);
index += 16;
// 32 bytes at +0x20 from input seed xored with xor pad
for (std::size_t i = 0; i < 32; i++)
output[index + i] = seed.raw[i + 32] ^ key.xor_pad[i];
index += 32;
outputLen = index;
}
void CryptoInit(CryptoCtx& ctx, mbedtls_md_context_t& hmac_ctx, const HmacKey& hmac_key,
const u8* seed, std::size_t seed_size) {
// Initialize context
ctx.used = false;
ctx.counter = 0;
ctx.buffer_size = sizeof(ctx.counter) + seed_size;
memcpy(ctx.buffer.data() + sizeof(u16), seed, seed_size);
// Initialize HMAC context
mbedtls_md_init(&hmac_ctx);
mbedtls_md_setup(&hmac_ctx, mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), 1);
mbedtls_md_hmac_starts(&hmac_ctx, hmac_key.data(), hmac_key.size());
}
void CryptoStep(CryptoCtx& ctx, mbedtls_md_context_t& hmac_ctx, DrgbOutput& output) {
// If used at least once, reinitialize the HMAC
if (ctx.used) {
mbedtls_md_hmac_reset(&hmac_ctx);
}
ctx.used = true;
// Store counter in big endian, and increment it
ctx.buffer[0] = static_cast<u8>(ctx.counter >> 8);
ctx.buffer[1] = static_cast<u8>(ctx.counter >> 0);
ctx.counter++;
// Do HMAC magic
mbedtls_md_hmac_update(&hmac_ctx, reinterpret_cast<const unsigned char*>(ctx.buffer.data()),
ctx.buffer_size);
mbedtls_md_hmac_finish(&hmac_ctx, output.data());
}
DerivedKeys GenerateKey(const InternalKey& key, const NTAG215File& data) {
constexpr std::size_t OUTPUT_SIZE = 512;
const auto seed = GetSeed(data);
// Generate internal seed
u8 internal_key[OUTPUT_SIZE];
std::size_t internal_key_lenght = 0;
PreGenerateKey(key, seed, internal_key, internal_key_lenght);
// Initialize context
CryptoCtx ctx{};
mbedtls_md_context_t hmac_ctx;
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

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src/core/hle/service/nfp/amiibo_crypto.h Normal file
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// 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

304
src/core/hle/service/nfp/amiibo_types.h Normal file
View file

@ -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

489
src/core/hle/service/nfp/nfp.cpp
View file

@ -4,6 +4,8 @@
#include <array>
#include <atomic>
#include "common/fs/file.h"
#include "common/fs/path_util.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/hid/emulated_controller.h"
@ -12,6 +14,7 @@
#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/nfp/amiibo_crypto.h"
#include "core/hle/service/nfp/nfp.h"
#include "core/hle/service/nfp/nfp_user.h"
@ -19,12 +22,13 @@ namespace Service::NFP {
namespace ErrCodes {
constexpr Result DeviceNotFound(ErrorModule::NFP, 64);
constexpr Result WrongDeviceState(ErrorModule::NFP, 73);
constexpr Result NfcDisabled(ErrorModule::NFP, 80);
constexpr Result WriteAmiiboFailed(ErrorModule::NFP, 88);
constexpr Result ApplicationAreaIsNotInitialized(ErrorModule::NFP, 128);
constexpr Result WrongApplicationAreaId(ErrorModule::NFP, 152);
constexpr Result ApplicationAreaExist(ErrorModule::NFP, 168);
} // namespace ErrCodes
constexpr u32 ApplicationAreaSize = 0xD8;
IUser::IUser(Module::Interface& nfp_interface_, Core::System& system_)
: ServiceFramework{system_, "NFP::IUser"}, service_context{system_, service_name},
nfp_interface{nfp_interface_} {
@ -39,7 +43,7 @@ IUser::IUser(Module::Interface& nfp_interface_, Core::System& system_)
{7, &IUser::OpenApplicationArea, "OpenApplicationArea"},
{8, &IUser::GetApplicationArea, "GetApplicationArea"},
{9, &IUser::SetApplicationArea, "SetApplicationArea"},
{10, nullptr, "Flush"},
{10, &IUser::Flush, "Flush"},
{11, nullptr, "Restore"},
{12, &IUser::CreateApplicationArea, "CreateApplicationArea"},
{13, &IUser::GetTagInfo, "GetTagInfo"},
@ -87,11 +91,23 @@ void IUser::Finalize(Kernel::HLERequestContext& ctx) {
void IUser::ListDevices(Kernel::HLERequestContext& ctx) {
LOG_INFO(Service_NFP, "called");
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
std::vector<u64> devices;
// TODO(german77): Loop through all interfaces
devices.push_back(nfp_interface.GetHandle());
if (devices.size() == 0) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::DeviceNotFound);
return;
}
ctx.WriteBuffer(devices);
IPC::ResponseBuilder rb{ctx, 3};
@ -105,6 +121,12 @@ void IUser::StartDetection(Kernel::HLERequestContext& ctx) {
const auto nfp_protocol{rp.Pop<s32>()};
LOG_INFO(Service_NFP, "called, device_handle={}, nfp_protocol={}", device_handle, nfp_protocol);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
const auto result = nfp_interface.StartDetection(nfp_protocol);
@ -124,6 +146,12 @@ void IUser::StopDetection(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
const auto result = nfp_interface.StopDetection();
@ -146,6 +174,12 @@ void IUser::Mount(Kernel::HLERequestContext& ctx) {
LOG_INFO(Service_NFP, "called, device_handle={}, model_type={}, mount_target={}", device_handle,
model_type, mount_target);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
const auto result = nfp_interface.Mount();
@ -165,6 +199,12 @@ void IUser::Unmount(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
const auto result = nfp_interface.Unmount();
@ -186,6 +226,12 @@ void IUser::OpenApplicationArea(Kernel::HLERequestContext& ctx) {
LOG_WARNING(Service_NFP, "(STUBBED) called, device_handle={}, access_id={}", device_handle,
access_id);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
const auto result = nfp_interface.OpenApplicationArea(access_id);
@ -205,9 +251,15 @@ void IUser::GetApplicationArea(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
std::vector<u8> data{};
ApplicationArea data{};
const auto result = nfp_interface.GetApplicationArea(data);
ctx.WriteBuffer(data);
IPC::ResponseBuilder rb{ctx, 3};
@ -229,6 +281,12 @@ void IUser::SetApplicationArea(Kernel::HLERequestContext& ctx) {
LOG_WARNING(Service_NFP, "(STUBBED) called, device_handle={}, data_size={}", device_handle,
data.size());
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
const auto result = nfp_interface.SetApplicationArea(data);
@ -243,6 +301,31 @@ void IUser::SetApplicationArea(Kernel::HLERequestContext& ctx) {
rb.Push(ErrCodes::DeviceNotFound);
}
void IUser::Flush(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const auto device_handle{rp.Pop<u64>()};
LOG_WARNING(Service_NFP, "(STUBBED) called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
const auto result = nfp_interface.Flush();
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(result);
return;
}
LOG_ERROR(Service_NFP, "Handle not found, device_handle={}", device_handle);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::DeviceNotFound);
}
void IUser::CreateApplicationArea(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const auto device_handle{rp.Pop<u64>()};
@ -251,6 +334,12 @@ void IUser::CreateApplicationArea(Kernel::HLERequestContext& ctx) {
LOG_WARNING(Service_NFP, "(STUBBED) called, device_handle={}, data_size={}, access_id={}",
device_handle, access_id, data.size());
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
const auto result = nfp_interface.CreateApplicationArea(access_id, data);
@ -270,6 +359,12 @@ void IUser::GetTagInfo(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
TagInfo tag_info{};
@ -291,6 +386,12 @@ void IUser::GetRegisterInfo(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
RegisterInfo register_info{};
@ -312,6 +413,12 @@ void IUser::GetCommonInfo(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
CommonInfo common_info{};
@ -333,6 +440,12 @@ void IUser::GetModelInfo(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_INFO(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
ModelInfo model_info{};
@ -354,6 +467,12 @@ void IUser::AttachActivateEvent(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_DEBUG(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
IPC::ResponseBuilder rb{ctx, 2, 1};
@ -373,6 +492,12 @@ void IUser::AttachDeactivateEvent(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_DEBUG(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
IPC::ResponseBuilder rb{ctx, 2, 1};
@ -419,6 +544,12 @@ void IUser::GetNpadId(Kernel::HLERequestContext& ctx) {
const auto device_handle{rp.Pop<u64>()};
LOG_DEBUG(Service_NFP, "called, device_handle={}", device_handle);
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
// TODO(german77): Loop through all interfaces
if (device_handle == nfp_interface.GetHandle()) {
IPC::ResponseBuilder rb{ctx, 3};
@ -442,7 +573,7 @@ void IUser::GetApplicationAreaSize(Kernel::HLERequestContext& ctx) {
if (device_handle == nfp_interface.GetHandle()) {
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(ResultSuccess);
rb.Push(ApplicationAreaSize);
rb.Push(sizeof(ApplicationArea));
return;
}
@ -455,6 +586,12 @@ void IUser::GetApplicationAreaSize(Kernel::HLERequestContext& ctx) {
void IUser::AttachAvailabilityChangeEvent(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_NFP, "(STUBBED) called");
if (state == State::NonInitialized) {
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ErrCodes::NfcDisabled);
return;
}
IPC::ResponseBuilder rb{ctx, 2, 1};
rb.Push(ResultSuccess);
rb.PushCopyObjects(availability_change_event->GetReadableEvent());
@ -478,37 +615,43 @@ void Module::Interface::CreateUserInterface(Kernel::HLERequestContext& ctx) {
rb.PushIpcInterface<IUser>(*this, system);
}
bool Module::Interface::LoadAmiibo(const std::vector<u8>& buffer) {
bool Module::Interface::LoadAmiiboFile(const std::string& filename) {
constexpr auto tag_size_without_password = sizeof(NTAG215File) - sizeof(NTAG215Password);
const Common::FS::IOFile amiibo_file{filename, Common::FS::FileAccessMode::Read,
Common::FS::FileType::BinaryFile};
if (!amiibo_file.IsOpen()) {
LOG_ERROR(Core, "Amiibo is already on use");
return false;
}
// Workaround for files with missing password data
std::array<u8, sizeof(EncryptedNTAG215File)> buffer{};
if (amiibo_file.Read(buffer) < tag_size_without_password) {
LOG_ERROR(Core, "Failed to read amiibo file");
return false;
}
memcpy(&encrypted_tag_data, buffer.data(), sizeof(EncryptedNTAG215File));
if (!AmiiboCrypto::IsAmiiboValid(encrypted_tag_data)) {
LOG_INFO(Service_NFP, "Invalid amiibo");
return false;
}
file_path = filename;
return true;
}
bool Module::Interface::LoadAmiibo(const std::string& filename) {
if (device_state != DeviceState::SearchingForTag) {
LOG_ERROR(Service_NFP, "Game is not looking for amiibos, current state {}", device_state);
return false;
}
constexpr auto tag_size = sizeof(NTAG215File);
constexpr auto tag_size_without_password = sizeof(NTAG215File) - sizeof(NTAG215Password);
std::vector<u8> amiibo_buffer = buffer;
if (amiibo_buffer.size() < tag_size_without_password) {
LOG_ERROR(Service_NFP, "Wrong file size {}", buffer.size());
if (!LoadAmiiboFile(filename)) {
return false;
}
// Ensure it has the correct size
if (amiibo_buffer.size() != tag_size) {
amiibo_buffer.resize(tag_size, 0);
}
LOG_INFO(Service_NFP, "Amiibo detected");
std::memcpy(&tag_data, buffer.data(), tag_size);
if (!IsAmiiboValid()) {
return false;
}
// This value can't be dumped from a tag. Generate it
tag_data.password.PWD = GetTagPassword(tag_data.uuid);
device_state = DeviceState::TagFound;
activate_event->GetWritableEvent().Signal();
return true;
@ -517,55 +660,13 @@ bool Module::Interface::LoadAmiibo(const std::vector<u8>& buffer) {
void Module::Interface::CloseAmiibo() {
LOG_INFO(Service_NFP, "Remove amiibo");
device_state = DeviceState::TagRemoved;
is_data_decoded = false;
is_application_area_initialized = false;
application_area_id = 0;
application_area_data.clear();
encrypted_tag_data = {};
tag_data = {};
deactivate_event->GetWritableEvent().Signal();
}
bool Module::Interface::IsAmiiboValid() const {
const auto& amiibo_data = tag_data.user_memory;
LOG_DEBUG(Service_NFP, "uuid_lock=0x{0:x}", tag_data.lock_bytes);
LOG_DEBUG(Service_NFP, "compability_container=0x{0:x}", tag_data.compability_container);
LOG_DEBUG(Service_NFP, "crypto_init=0x{0:x}", amiibo_data.crypto_init);
LOG_DEBUG(Service_NFP, "write_count={}", amiibo_data.write_count);
LOG_DEBUG(Service_NFP, "character_id=0x{0:x}", amiibo_data.model_info.character_id);
LOG_DEBUG(Service_NFP, "character_variant={}", amiibo_data.model_info.character_variant);
LOG_DEBUG(Service_NFP, "amiibo_type={}", amiibo_data.model_info.amiibo_type);
LOG_DEBUG(Service_NFP, "model_number=0x{0:x}", amiibo_data.model_info.model_number);
LOG_DEBUG(Service_NFP, "series={}", amiibo_data.model_info.series);
LOG_DEBUG(Service_NFP, "fixed_value=0x{0:x}", amiibo_data.model_info.fixed);
LOG_DEBUG(Service_NFP, "tag_dynamic_lock=0x{0:x}", tag_data.dynamic_lock);
LOG_DEBUG(Service_NFP, "tag_CFG0=0x{0:x}", tag_data.CFG0);
LOG_DEBUG(Service_NFP, "tag_CFG1=0x{0:x}", tag_data.CFG1);
// Check against all know constants on an amiibo binary
if (tag_data.lock_bytes != 0xE00F) {
return false;
}
if (tag_data.compability_container != 0xEEFF10F1U) {
return false;
}
if ((amiibo_data.crypto_init & 0xFF) != 0xA5) {
return false;
}
if (amiibo_data.model_info.fixed != 0x02) {
return false;
}
if ((tag_data.dynamic_lock & 0xFFFFFF) != 0x0F0001) {
return false;
}
if (tag_data.CFG0 != 0x04000000U) {
return false;
}
if (tag_data.CFG1 != 0x5F) {
return false;
}
return true;
}
Kernel::KReadableEvent& Module::Interface::GetActivateEvent() const {
return activate_event->GetReadableEvent();
}
@ -576,13 +677,20 @@ Kernel::KReadableEvent& Module::Interface::GetDeactivateEvent() const {
void Module::Interface::Initialize() {
device_state = DeviceState::Initialized;
is_data_decoded = false;
is_application_area_initialized = false;
encrypted_tag_data = {};
tag_data = {};
}
void Module::Interface::Finalize() {
if (device_state == DeviceState::TagMounted) {
Unmount();
}
if (device_state == DeviceState::SearchingForTag || device_state == DeviceState::TagRemoved) {
StopDetection();
}
device_state = DeviceState::Unaviable;
is_application_area_initialized = false;
application_area_id = 0;
application_area_data.clear();
}
Result Module::Interface::StartDetection(s32 protocol_) {
@ -618,58 +726,132 @@ Result Module::Interface::StopDetection() {
return ErrCodes::WrongDeviceState;
}
Result Module::Interface::Flush() {
// Ignore write command if we can't encrypt the data
if (!is_data_decoded) {
return ResultSuccess;
}
constexpr auto tag_size_without_password = sizeof(NTAG215File) - sizeof(NTAG215Password);
EncryptedNTAG215File tmp_encrypted_tag_data{};
const Common::FS::IOFile amiibo_file{file_path, Common::FS::FileAccessMode::ReadWrite,
Common::FS::FileType::BinaryFile};
if (!amiibo_file.IsOpen()) {
LOG_ERROR(Core, "Amiibo is already on use");
return ErrCodes::WriteAmiiboFailed;
}
// Workaround for files with missing password data
std::array<u8, sizeof(EncryptedNTAG215File)> buffer{};
if (amiibo_file.Read(buffer) < tag_size_without_password) {
LOG_ERROR(Core, "Failed to read amiibo file");
return ErrCodes::WriteAmiiboFailed;
}
memcpy(&tmp_encrypted_tag_data, buffer.data(), sizeof(EncryptedNTAG215File));
if (!AmiiboCrypto::IsAmiiboValid(tmp_encrypted_tag_data)) {
LOG_INFO(Service_NFP, "Invalid amiibo");
return ErrCodes::WriteAmiiboFailed;
}
bool is_uuid_equal = memcmp(tmp_encrypted_tag_data.uuid.data(), tag_data.uuid.data(), 8) == 0;
bool is_character_equal = tmp_encrypted_tag_data.user_memory.model_info.character_id ==
tag_data.model_info.character_id;
if (!is_uuid_equal || !is_character_equal) {
LOG_ERROR(Core, "Not the same amiibo");
return ErrCodes::WriteAmiiboFailed;
}
if (!AmiiboCrypto::EncodeAmiibo(tag_data, encrypted_tag_data)) {
LOG_ERROR(Core, "Failed to encode data");
return ErrCodes::WriteAmiiboFailed;
}
// Return to the start of the file
if (!amiibo_file.Seek(0)) {
LOG_ERROR(Service_NFP, "Error writting to file");
return ErrCodes::WriteAmiiboFailed;
}
if (!amiibo_file.Write(encrypted_tag_data)) {
LOG_ERROR(Service_NFP, "Error writting to file");
return ErrCodes::WriteAmiiboFailed;
}
return ResultSuccess;
}
Result Module::Interface::Mount() {
if (device_state == DeviceState::TagFound) {
if (device_state != DeviceState::TagFound) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
is_data_decoded = AmiiboCrypto::DecodeAmiibo(encrypted_tag_data, tag_data);
LOG_INFO(Service_NFP, "Is amiibo decoded {}", is_data_decoded);
is_application_area_initialized = false;
device_state = DeviceState::TagMounted;
return ResultSuccess;
}
Result Module::Interface::Unmount() {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
Result Module::Interface::Unmount() {
if (device_state == DeviceState::TagMounted) {
is_data_decoded = false;
is_application_area_initialized = false;
application_area_id = 0;
application_area_data.clear();
device_state = DeviceState::TagFound;
return ResultSuccess;
}
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
Result Module::Interface::GetTagInfo(TagInfo& tag_info) const {
if (device_state == DeviceState::TagFound || device_state == DeviceState::TagMounted) {
tag_info = {
.uuid = tag_data.uuid,
.uuid_length = static_cast<u8>(tag_data.uuid.size()),
.protocol = protocol,
.tag_type = static_cast<u32>(tag_data.user_memory.model_info.amiibo_type),
};
return ResultSuccess;
}
if (device_state != DeviceState::TagFound && device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
tag_info = {
.uuid = encrypted_tag_data.uuid,
.uuid_length = static_cast<u8>(encrypted_tag_data.uuid.size()),
.protocol = protocol,
.tag_type = static_cast<u32>(encrypted_tag_data.user_memory.model_info.amiibo_type),
};
return ResultSuccess;
}
Result Module::Interface::GetCommonInfo(CommonInfo& common_info) const {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
// Read this data from the amiibo save file
if (is_data_decoded) {
const auto& settings = tag_data.settings;
// TODO: Validate this data
common_info = {
.last_write_year = static_cast<u16>(settings.write_date.year.Value()),
.last_write_month = static_cast<u8>(settings.write_date.month.Value()),
.last_write_day = static_cast<u8>(settings.write_date.day.Value()),
.write_counter = settings.crc_counter,
.version = 1,
.application_area_size = sizeof(ApplicationArea),
};
return ResultSuccess;
}
// Generate a generic answer
common_info = {
.last_write_year = 2022,
.last_write_month = 2,
.last_write_day = 7,
.write_counter = tag_data.user_memory.write_count,
.write_counter = 0,
.version = 1,
.application_area_size = ApplicationAreaSize,
.application_area_size = sizeof(ApplicationArea),
};
return ResultSuccess;
}
@ -680,7 +862,15 @@ Result Module::Interface::GetModelInfo(ModelInfo& model_info) const {
return ErrCodes::WrongDeviceState;
}
model_info = tag_data.user_memory.model_info;
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,
.constant_value = model_info_data.constant_value,
};
return ResultSuccess;
}
@ -690,9 +880,30 @@ Result Module::Interface::GetRegisterInfo(RegisterInfo& register_info) const {
return ErrCodes::WrongDeviceState;
}
Service::Mii::MiiManager manager;
if (is_data_decoded) {
const auto& settings = tag_data.settings;
// Read this data from the amiibo save file
// Amiibo name is u16 while the register info is u8. Figure out how to handle this properly
std::array<u8, 11> amiibo_name{};
for (std::size_t i = 0; i < sizeof(amiibo_name) - 1; ++i) {
amiibo_name[i] = static_cast<u8>(settings.amiibo_name[i]);
}
// TODO: Validate this data
register_info = {
.mii_char_info = AmiiboCrypto::AmiiboRegisterInfoToMii(tag_data.owner_mii),
.first_write_year = static_cast<u16>(settings.init_date.year.Value()),
.first_write_month = static_cast<u8>(settings.init_date.month.Value()),
.first_write_day = static_cast<u8>(settings.init_date.day.Value()),
.amiibo_name = amiibo_name,
.unknown = {},
};
return ResultSuccess;
}
// Generate a generic answer
Service::Mii::MiiManager manager;
register_info = {
.mii_char_info = manager.BuildDefault(0),
.first_write_year = 2022,
@ -709,29 +920,39 @@ Result Module::Interface::OpenApplicationArea(u32 access_id) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
if (AmiiboApplicationDataExist(access_id)) {
application_area_data = LoadAmiiboApplicationData(access_id);
application_area_id = access_id;
is_application_area_initialized = true;
}
if (!is_application_area_initialized) {
// Fallback for lack of amiibo keys
if (!is_data_decoded) {
LOG_WARNING(Service_NFP, "Application area is not initialized");
return ErrCodes::ApplicationAreaIsNotInitialized;
}
if (tag_data.settings.settings.appdata_initialized == 0) {
LOG_WARNING(Service_NFP, "Application area is not initialized");
return ErrCodes::ApplicationAreaIsNotInitialized;
}
if (tag_data.application_area_id != access_id) {
LOG_WARNING(Service_NFP, "Wrong application area id");
return ErrCodes::WrongApplicationAreaId;
}
is_application_area_initialized = true;
return ResultSuccess;
}
Result Module::Interface::GetApplicationArea(std::vector<u8>& data) const {
Result Module::Interface::GetApplicationArea(ApplicationArea& data) const {
if (device_state != DeviceState::TagMounted) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
if (!is_application_area_initialized) {
LOG_ERROR(Service_NFP, "Application area is not initialized");
return ErrCodes::ApplicationAreaIsNotInitialized;
}
data = application_area_data;
data = tag_data.application_area;
return ResultSuccess;
}
@ -741,12 +962,18 @@ Result Module::Interface::SetApplicationArea(const std::vector<u8>& data) {
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
if (!is_application_area_initialized) {
LOG_ERROR(Service_NFP, "Application area is not initialized");
return ErrCodes::ApplicationAreaIsNotInitialized;
}
application_area_data = data;
SaveAmiiboApplicationData(application_area_id, application_area_data);
if (data.size() != sizeof(ApplicationArea)) {
LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
return ResultUnknown;
}
std::memcpy(&tag_data.application_area, data.data(), sizeof(ApplicationArea));
return ResultSuccess;
}
@ -755,32 +982,23 @@ Result Module::Interface::CreateApplicationArea(u32 access_id, const std::vector
LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
return ErrCodes::WrongDeviceState;
}
if (AmiiboApplicationDataExist(access_id)) {
if (tag_data.settings.settings.appdata_initialized != 0) {
LOG_ERROR(Service_NFP, "Application area already exist");
return ErrCodes::ApplicationAreaExist;
}
application_area_data = data;
application_area_id = access_id;
SaveAmiiboApplicationData(application_area_id, application_area_data);
if (data.size() != sizeof(ApplicationArea)) {
LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
return ResultUnknown;
}
std::memcpy(&tag_data.application_area, data.data(), sizeof(ApplicationArea));
tag_data.application_area_id = access_id;
return ResultSuccess;
}
bool Module::Interface::AmiiboApplicationDataExist(u32 access_id) const {
// TODO(german77): Check if file exist
return false;
}
std::vector<u8> Module::Interface::LoadAmiiboApplicationData(u32 access_id) const {
// TODO(german77): Read file
std::vector<u8> data(ApplicationAreaSize);
return data;
}
void Module::Interface::SaveAmiiboApplicationData(u32 access_id,
const std::vector<u8>& data) const {
// TODO(german77): Save file
}
u64 Module::Interface::GetHandle() const {
// Generate a handle based of the npad id
return static_cast<u64>(npad_id);
@ -794,15 +1012,6 @@ Core::HID::NpadIdType Module::Interface::GetNpadId() const {
return npad_id;
}
u32 Module::Interface::GetTagPassword(const TagUuid& uuid) const {
// Verifiy that the generated password is correct
u32 password = 0xAA ^ (uuid[1] ^ uuid[3]);
password &= (0x55 ^ (uuid[2] ^ uuid[4])) << 8;
password &= (0xAA ^ (uuid[3] ^ uuid[5])) << 16;
password &= (0x55 ^ (uuid[4] ^ uuid[6])) << 24;
return password;
}
void InstallInterfaces(SM::ServiceManager& service_manager, Core::System& system) {
auto module = std::make_shared<Module>();
std::make_shared<NFP_User>(module, system)->InstallAsService(service_manager);

137
src/core/hle/service/nfp/nfp.h
View file

@ -9,6 +9,7 @@
#include "common/common_funcs.h"
#include "core/hle/service/kernel_helpers.h"
#include "core/hle/service/mii/types.h"
#include "core/hle/service/nfp/amiibo_types.h"
#include "core/hle/service/service.h"
namespace Kernel {
@ -21,72 +22,6 @@ enum class NpadIdType : u32;
} // namespace Core::HID
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>;
struct TagInfo {
TagUuid uuid;
u8 uuid_length;
@ -114,10 +49,8 @@ struct ModelInfo {
AmiiboType amiibo_type;
u16 model_number;
AmiiboSeries series;
u8 fixed; // Must be 02
INSERT_PADDING_BYTES(0x4); // Unknown
INSERT_PADDING_BYTES(0x20); // Probably a SHA256-(HMAC?) hash
INSERT_PADDING_BYTES(0x14); // SHA256-HMAC
u8 constant_value; // Must be 02
INSERT_PADDING_BYTES(0x38); // Unknown
};
static_assert(sizeof(ModelInfo) == 0x40, "ModelInfo is an invalid size");
@ -126,7 +59,7 @@ struct RegisterInfo {
u16 first_write_year;
u8 first_write_month;
u8 first_write_day;
std::array<u8, 11> amiibo_name;
std::array<u8, 0xA + 1> amiibo_name;
u8 unknown;
INSERT_PADDING_BYTES(0x98);
};
@ -140,39 +73,9 @@ public:
const char* name);
~Interface() override;
struct EncryptedAmiiboFile {
u16 crypto_init; // Must be A5 XX
u16 write_count; // Number of times the amiibo has been written?
INSERT_PADDING_BYTES(0x20); // System crypts
INSERT_PADDING_BYTES(0x20); // SHA256-(HMAC?) hash
ModelInfo model_info; // This struct is bigger than documentation
INSERT_PADDING_BYTES(0xC); // SHA256-HMAC
INSERT_PADDING_BYTES(0x114); // section 1 encrypted buffer
INSERT_PADDING_BYTES(0x54); // section 2 encrypted buffer
};
static_assert(sizeof(EncryptedAmiiboFile) == 0x1F8, "AmiiboFile 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");
struct NTAG215File {
TagUuid uuid; // Unique serial number
u16 lock_bytes; // 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(NTAG215File) == 0x21C, "NTAG215File is an invalid size");
void CreateUserInterface(Kernel::HLERequestContext& ctx);
bool LoadAmiibo(const std::vector<u8>& buffer);
bool LoadAmiibo(const std::string& filename);
bool LoadAmiiboFile(const std::string& filename);
void CloseAmiibo();
void Initialize();
@ -182,6 +85,7 @@ public:
Result StopDetection();
Result Mount();
Result Unmount();
Result Flush();
Result GetTagInfo(TagInfo& tag_info) const;
Result GetCommonInfo(CommonInfo& common_info) const;
@ -189,7 +93,7 @@ public:
Result GetRegisterInfo(RegisterInfo& register_info) const;
Result OpenApplicationArea(u32 access_id);
Result GetApplicationArea(std::vector<u8>& data) const;
Result GetApplicationArea(ApplicationArea& data) const;
Result SetApplicationArea(const std::vector<u8>& data);
Result CreateApplicationArea(u32 access_id, const std::vector<u8>& data);
@ -204,27 +108,19 @@ public:
std::shared_ptr<Module> module;
private:
/// Validates that the amiibo file is not corrupted
bool IsAmiiboValid() const;
bool AmiiboApplicationDataExist(u32 access_id) const;
std::vector<u8> LoadAmiiboApplicationData(u32 access_id) const;
void SaveAmiiboApplicationData(u32 access_id, const std::vector<u8>& data) const;
/// return password needed to allow write access to protected memory
u32 GetTagPassword(const TagUuid& uuid) const;
const Core::HID::NpadIdType npad_id;
DeviceState device_state{DeviceState::Unaviable};
KernelHelpers::ServiceContext service_context;
bool is_data_decoded{};
bool is_application_area_initialized{};
s32 protocol;
std::string file_path{};
Kernel::KEvent* activate_event;
Kernel::KEvent* deactivate_event;
DeviceState device_state{DeviceState::Unaviable};
KernelHelpers::ServiceContext service_context;
NTAG215File tag_data{};
s32 protocol;
bool is_application_area_initialized{};
u32 application_area_id;
std::vector<u8> application_area_data;
EncryptedNTAG215File encrypted_tag_data{};
};
};
@ -243,6 +139,7 @@ private:
void OpenApplicationArea(Kernel::HLERequestContext& ctx);
void GetApplicationArea(Kernel::HLERequestContext& ctx);
void SetApplicationArea(Kernel::HLERequestContext& ctx);
void Flush(Kernel::HLERequestContext& ctx);
void CreateApplicationArea(Kernel::HLERequestContext& ctx);
void GetTagInfo(Kernel::HLERequestContext& ctx);
void GetRegisterInfo(Kernel::HLERequestContext& ctx);

21
src/yuzu/main.cpp
View file

@ -3254,26 +3254,7 @@ void GMainWindow::LoadAmiibo(const QString& filename) {
return;
}
QFile nfc_file{filename};
if (!nfc_file.open(QIODevice::ReadOnly)) {
QMessageBox::warning(this, tr("Error opening Amiibo data file"),
tr("Unable to open Amiibo file \"%1\" for reading.").arg(filename));
return;
}
const u64 nfc_file_size = nfc_file.size();
std::vector<u8> buffer(nfc_file_size);
const u64 read_size = nfc_file.read(reinterpret_cast<char*>(buffer.data()), nfc_file_size);
if (nfc_file_size != read_size) {
QMessageBox::warning(this, tr("Error reading Amiibo data file"),
tr("Unable to fully read Amiibo data. Expected to read %1 bytes, but "
"was only able to read %2 bytes.")
.arg(nfc_file_size)
.arg(read_size));
return;
}
if (!nfc->LoadAmiibo(buffer)) {
if (!nfc->LoadAmiibo(filename.toStdString())) {
QMessageBox::warning(this, tr("Error loading Amiibo data"),
tr("Unable to load Amiibo data."));
}