service: nfc: Merge device interfaces and create the device manager

src/core/hle/service/nfc/common/amiibo_crypto.cpp

@@ -0,0 +1,405 @@
+// 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/fs.h"
+#include "common/fs/path_util.h"
+#include "common/logging/log.h"
+#include "core/hle/service/nfc/common/amiibo_crypto.h"
+
+namespace Service::NFP::AmiiboCrypto {
+
+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_DEBUG(Service_NFP, "write_count={}", static_cast<u16>(amiibo_data.write_counter));
+
+    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}",
+              static_cast<u16>(amiibo_data.model_info.model_number));
+    LOG_DEBUG(Service_NFP, "series={}", amiibo_data.model_info.series);
+    LOG_DEBUG(Service_NFP, "tag_type=0x{0:x}", amiibo_data.model_info.tag_type);
+
+    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.uid[0] ^ ntag_file.uuid.uid[1] ^ ntag_file.uuid.uid[2]) !=
+        ntag_file.uuid.uid[3]) {
+        return false;
+    }
+    if ((ntag_file.uuid.uid[4] ^ ntag_file.uuid.uid[5] ^ ntag_file.uuid.uid[6] ^
+         ntag_file.uuid.nintendo_id) != ntag_file.uuid.lock_bytes[0]) {
+        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.tag_type != NFC::PackedTagType::Type2) {
+        return false;
+    }
+    if ((ntag_file.dynamic_lock & 0xFFFFFF) != 0x0F0001U) {
+        return false;
+    }
+    if (ntag_file.CFG0 != 0x04000000U) {
+        return false;
+    }
+    if (ntag_file.CFG1 != 0x5F) {
+        return false;
+    }
+    return true;
+}
+
+bool IsAmiiboValid(const NTAG215File& ntag_file) {
+    return IsAmiiboValid(EncodedDataToNfcData(ntag_file));
+}
+
+NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data) {
+    NTAG215File encoded_data{};
+
+    encoded_data.uid = nfc_data.uuid.uid;
+    encoded_data.nintendo_id = nfc_data.uuid.nintendo_id;
+    encoded_data.static_lock = nfc_data.static_lock;
+    encoded_data.compability_container = nfc_data.compability_container;
+    encoded_data.hmac_data = nfc_data.user_memory.hmac_data;
+    encoded_data.constant_value = nfc_data.user_memory.constant_value;
+    encoded_data.write_counter = nfc_data.user_memory.write_counter;
+    encoded_data.amiibo_version = nfc_data.user_memory.amiibo_version;
+    encoded_data.settings = nfc_data.user_memory.settings;
+    encoded_data.owner_mii = nfc_data.user_memory.owner_mii;
+    encoded_data.application_id = nfc_data.user_memory.application_id;
+    encoded_data.application_write_counter = nfc_data.user_memory.application_write_counter;
+    encoded_data.application_area_id = nfc_data.user_memory.application_area_id;
+    encoded_data.application_id_byte = nfc_data.user_memory.application_id_byte;
+    encoded_data.unknown = nfc_data.user_memory.unknown;
+    encoded_data.mii_extension = nfc_data.user_memory.mii_extension;
+    encoded_data.unknown2 = nfc_data.user_memory.unknown2;
+    encoded_data.register_info_crc = nfc_data.user_memory.register_info_crc;
+    encoded_data.application_area = nfc_data.user_memory.application_area;
+    encoded_data.hmac_tag = nfc_data.user_memory.hmac_tag;
+    encoded_data.lock_bytes = nfc_data.uuid.lock_bytes;
+    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{};
+
+    nfc_data.uuid.uid = encoded_data.uid;
+    nfc_data.uuid.nintendo_id = encoded_data.nintendo_id;
+    nfc_data.uuid.lock_bytes = encoded_data.lock_bytes;
+    nfc_data.static_lock = encoded_data.static_lock;
+    nfc_data.compability_container = encoded_data.compability_container;
+    nfc_data.user_memory.hmac_data = encoded_data.hmac_data;
+    nfc_data.user_memory.constant_value = encoded_data.constant_value;
+    nfc_data.user_memory.write_counter = encoded_data.write_counter;
+    nfc_data.user_memory.amiibo_version = encoded_data.amiibo_version;
+    nfc_data.user_memory.settings = encoded_data.settings;
+    nfc_data.user_memory.owner_mii = encoded_data.owner_mii;
+    nfc_data.user_memory.application_id = encoded_data.application_id;
+    nfc_data.user_memory.application_write_counter = encoded_data.application_write_counter;
+    nfc_data.user_memory.application_area_id = encoded_data.application_area_id;
+    nfc_data.user_memory.application_id_byte = encoded_data.application_id_byte;
+    nfc_data.user_memory.unknown = encoded_data.unknown;
+    nfc_data.user_memory.mii_extension = encoded_data.mii_extension;
+    nfc_data.user_memory.unknown2 = encoded_data.unknown2;
+    nfc_data.user_memory.register_info_crc = encoded_data.register_info_crc;
+    nfc_data.user_memory.application_area = encoded_data.application_area;
+    nfc_data.user_memory.hmac_tag = encoded_data.hmac_tag;
+    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) {
+    // Verify that the generated password is correct
+    u32 password = 0xAA ^ (uuid.uid[1] ^ uuid.uid[3]);
+    password &= (0x55 ^ (uuid.uid[2] ^ uuid.uid[4])) << 8;
+    password &= (0xAA ^ (uuid.uid[3] ^ uuid.uid[5])) << 16;
+    password &= (0x55 ^ (uuid.uid[4] ^ uuid.uid[6])) << 24;
+    return password;
+}
+
+HashSeed GetSeed(const NTAG215File& data) {
+    HashSeed seed{
+        .magic = data.write_counter,
+        .padding = {},
+        .uid_1 = data.uid,
+        .nintendo_id_1 = data.nintendo_id,
+        .uid_2 = data.uid,
+        .nintendo_id_2 = data.nintendo_id,
+        .keygen_salt = data.keygen_salt,
+    };
+
+    return seed;
+}
+
+std::vector<u8> GenerateInternalKey(const InternalKey& key, const HashSeed& seed) {
+    const std::size_t seedPart1Len = sizeof(key.magic_bytes) - key.magic_length;
+    const std::size_t string_size = key.type_string.size();
+    std::vector<u8> output(string_size + seedPart1Len);
+
+    // Copy whole type string
+    memccpy(output.data(), key.type_string.data(), '\0', string_size);
+
+    // Append (16 - magic_length) from the input seed
+    memcpy(output.data() + string_size, &seed, seedPart1Len);
+
+    // Append all bytes from magicBytes
+    output.insert(output.end(), key.magic_bytes.begin(),
+                  key.magic_bytes.begin() + key.magic_length);
+
+    output.insert(output.end(), seed.uid_1.begin(), seed.uid_1.end());
+    output.emplace_back(seed.nintendo_id_1);
+    output.insert(output.end(), seed.uid_2.begin(), seed.uid_2.end());
+    output.emplace_back(seed.nintendo_id_2);
+
+    for (std::size_t i = 0; i < sizeof(seed.keygen_salt); i++) {
+        output.emplace_back(static_cast<u8>(seed.keygen_salt[i] ^ key.xor_pad[i]));
+    }
+
+    return output;
+}
+
+void CryptoInit(CryptoCtx& ctx, mbedtls_md_context_t& hmac_ctx, const HmacKey& hmac_key,
+                const std::vector<u8>& seed) {
+    // Initialize context
+    ctx.used = false;
+    ctx.counter = 0;
+    ctx.buffer_size = sizeof(ctx.counter) + seed.size();
+    memcpy(ctx.buffer.data() + sizeof(u16), seed.data(), 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) {
+    const auto seed = GetSeed(data);
+
+    // Generate internal seed
+    const std::vector<u8> internal_key = GenerateInternalKey(key, seed);
+
+    // Initialize context
+    CryptoCtx ctx{};
+    mbedtls_md_context_t hmac_ctx;
+    CryptoInit(ctx, hmac_ctx, key.hmac_key, internal_key);
+
+    // 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, sizeof(keys.aes_iv)> nonce_counter{};
+    std::array<u8, sizeof(keys.aes_iv)> stream_block{};
+
+    const auto aes_key_size = static_cast<u32>(keys.aes_key.size() * 8);
+    mbedtls_aes_setkey_enc(&aes, keys.aes_key.data(), aes_key_size);
+    memcpy(nonce_counter.data(), keys.aes_iv.data(), sizeof(keys.aes_iv));
+
+    constexpr std::size_t encrypted_data_size = HMAC_TAG_START - SETTINGS_START;
+    mbedtls_aes_crypt_ctr(&aes, encrypted_data_size, &nc_off, nonce_counter.data(),
+                          stream_block.data(),
+                          reinterpret_cast<const unsigned char*>(&in_data.settings),
+                          reinterpret_cast<unsigned char*>(&out_data.settings));
+
+    // Copy the rest of the data directly
+    out_data.uid = in_data.uid;
+    out_data.nintendo_id = in_data.nintendo_id;
+    out_data.lock_bytes = in_data.lock_bytes;
+    out_data.static_lock = in_data.static_lock;
+    out_data.compability_container = in_data.compability_container;
+
+    out_data.constant_value = in_data.constant_value;
+    out_data.write_counter = in_data.write_counter;
+
+    out_data.model_info = in_data.model_info;
+    out_data.keygen_salt = in_data.keygen_salt;
+    out_data.dynamic_lock = in_data.dynamic_lock;
+    out_data.CFG0 = in_data.CFG0;
+    out_data.CFG1 = in_data.CFG1;
+    out_data.password = in_data.password;
+}
+
+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(Service_NFP, "Failed to open key file");
+        return false;
+    }
+
+    if (keys_file.Read(unfixed_info) != 1) {
+        LOG_ERROR(Service_NFP, "Failed to read unfixed_info");
+        return false;
+    }
+    if (keys_file.Read(locked_secret) != 1) {
+        LOG_ERROR(Service_NFP, "Failed to read locked-secret");
+        return false;
+    }
+
+    return true;
+}
+
+bool IsKeyAvailable() {
+    const auto yuzu_keys_dir = Common::FS::GetYuzuPath(Common::FS::YuzuPath::KeysDir);
+    return Common::FS::Exists(yuzu_keys_dir / "key_retail.bin");
+}
+
+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);
+
+    // Regenerate tag HMAC. Note: order matters, data HMAC depends on tag HMAC!
+    constexpr std::size_t input_length = DYNAMIC_LOCK_START - UUID_START;
+    mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), tag_keys.hmac_key.data(),
+                    sizeof(HmacKey), reinterpret_cast<const unsigned char*>(&tag_data.uid),
+                    input_length, reinterpret_cast<unsigned char*>(&tag_data.hmac_tag));
+
+    // Regenerate data HMAC
+    constexpr std::size_t input_length2 = DYNAMIC_LOCK_START - WRITE_COUNTER_START;
+    mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), data_keys.hmac_key.data(),
+                    sizeof(HmacKey),
+                    reinterpret_cast<const unsigned char*>(&tag_data.write_counter), input_length2,
+                    reinterpret_cast<unsigned char*>(&tag_data.hmac_data));
+
+    if (tag_data.hmac_data != encrypted_tag_data.user_memory.hmac_data) {
+        LOG_ERROR(Service_NFP, "hmac_data doesn't match");
+        return false;
+    }
+
+    if (tag_data.hmac_tag != encrypted_tag_data.user_memory.hmac_tag) {
+        LOG_ERROR(Service_NFP, "hmac_tag doesn't match");
+        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);
+
+    NTAG215File encoded_tag_data{};
+
+    // Generate tag HMAC
+    constexpr std::size_t input_length = DYNAMIC_LOCK_START - UUID_START;
+    constexpr std::size_t input_length2 = HMAC_TAG_START - WRITE_COUNTER_START;
+    mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), tag_keys.hmac_key.data(),
+                    sizeof(HmacKey), reinterpret_cast<const unsigned char*>(&tag_data.uid),
+                    input_length, reinterpret_cast<unsigned char*>(&encoded_tag_data.hmac_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, reinterpret_cast<const unsigned char*>(&tag_data.write_counter),
+                           input_length2); // Data
+    mbedtls_md_hmac_update(&ctx, reinterpret_cast<unsigned char*>(&encoded_tag_data.hmac_tag),
+                           sizeof(HashData)); // Tag HMAC
+    mbedtls_md_hmac_update(&ctx, reinterpret_cast<const unsigned char*>(&tag_data.uid),
+                           input_length);
+    mbedtls_md_hmac_finish(&ctx, reinterpret_cast<unsigned char*>(&encoded_tag_data.hmac_data));
+
+    // HMAC cleanup
+    mbedtls_md_free(&ctx);
+
+    // Encrypt
+    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

src/core/hle/service/nfc/common/amiibo_crypto.h

@@ -0,0 +1,106 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "core/hle/service/nfp/nfp_types.h"
+
+struct mbedtls_md_context_t;
+
+namespace Service::NFP::AmiiboCrypto {
+// Byte locations in Service::NFP::NTAG215File
+constexpr std::size_t HMAC_DATA_START = 0x8;
+constexpr std::size_t SETTINGS_START = 0x2c;
+constexpr std::size_t WRITE_COUNTER_START = 0x29;
+constexpr std::size_t HMAC_TAG_START = 0x1B4;
+constexpr std::size_t UUID_START = 0x1D4;
+constexpr std::size_t DYNAMIC_LOCK_START = 0x208;
+
+using HmacKey = std::array<u8, 0x10>;
+using DrgbOutput = std::array<u8, 0x20>;
+
+struct HashSeed {
+    u16_be magic;
+    std::array<u8, 0xE> padding;
+    NFC::UniqueSerialNumber uid_1;
+    u8 nintendo_id_1;
+    NFC::UniqueSerialNumber uid_2;
+    u8 nintendo_id_2;
+    std::array<u8, 0x20> keygen_salt;
+};
+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");
+
+/// Validates that the amiibo file is not corrupted
+bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file);
+
+/// Validates that the amiibo file is not corrupted
+bool IsAmiiboValid(const NTAG215File& 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
+std::vector<u8> GenerateInternalKey(const InternalKey& key, const HashSeed& seed);
+
+// Initializes mbedtls context
+void CryptoInit(CryptoCtx& ctx, mbedtls_md_context_t& hmac_ctx, const HmacKey& hmac_key,
+                const std::vector<u8>& seed);
+
+// 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);
+
+/// Returns true if key_retail.bin exist
+bool IsKeyAvailable();
+
+/// Decodes encrypted 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

src/core/hle/service/nfc/common/device.h

@@ -0,0 +1,138 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <span>
+
+#include "common/common_types.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/nfc/mifare_types.h"
+#include "core/hle/service/nfc/nfc_types.h"
+#include "core/hle/service/nfp/nfp_types.h"
+#include "core/hle/service/service.h"
+#include "core/hle/service/time/clock_types.h"
+
+namespace Kernel {
+class KEvent;
+class KReadableEvent;
+} // namespace Kernel
+
+namespace Core {
+class System;
+} // namespace Core
+
+namespace Core::HID {
+class EmulatedController;
+enum class ControllerTriggerType;
+enum class NpadIdType : u32;
+} // namespace Core::HID
+
+namespace Service::NFC {
+class NfcDevice {
+public:
+    NfcDevice(Core::HID::NpadIdType npad_id_, Core::System& system_,
+              KernelHelpers::ServiceContext& service_context_,
+              Kernel::KEvent* availability_change_event_);
+    ~NfcDevice();
+
+    void Initialize();
+    void Finalize();
+
+    Result StartDetection(NfcProtocol allowed_protocol);
+    Result StopDetection();
+
+    Result GetTagInfo(TagInfo& tag_info, bool is_mifare) const;
+
+    Result ReadMifare(std::span<const MifareReadBlockParameter> parameters,
+                      std::span<MifareReadBlockData> read_block_data) const;
+    Result ReadMifare(const MifareReadBlockParameter& parameter,
+                      MifareReadBlockData& read_block_data) const;
+
+    Result WriteMifare(std::span<const MifareWriteBlockParameter> parameters);
+    Result WriteMifare(const MifareWriteBlockParameter& parameter);
+
+    Result SendCommandByPassThrough(const Time::Clock::TimeSpanType& timeout,
+                                    std::span<const u8> command_data, std::span<u8> out_data);
+
+    Result Mount(NFP::ModelType model_type, NFP::MountTarget mount_target);
+    Result Unmount();
+
+    Result Flush();
+    Result FlushDebug();
+    Result FlushWithBreak(NFP::BreakType break_type);
+    Result Restore();
+
+    Result GetCommonInfo(NFP::CommonInfo& common_info) const;
+    Result GetModelInfo(NFP::ModelInfo& model_info) const;
+    Result GetRegisterInfo(NFP::RegisterInfo& register_info) const;
+    Result GetRegisterInfoPrivate(NFP::RegisterInfoPrivate& register_info) const;
+    Result GetAdminInfo(NFP::AdminInfo& admin_info) const;
+
+    Result DeleteRegisterInfo();
+    Result SetRegisterInfoPrivate(const NFP::RegisterInfoPrivate& register_info);
+    Result RestoreAmiibo();
+    Result Format();
+
+    Result OpenApplicationArea(u32 access_id);
+    Result GetApplicationAreaId(u32& application_area_id) const;
+    Result GetApplicationArea(std::span<u8> data) const;
+    Result SetApplicationArea(std::span<const u8> data);
+    Result CreateApplicationArea(u32 access_id, std::span<const u8> data);
+    Result RecreateApplicationArea(u32 access_id, std::span<const u8> data);
+    Result DeleteApplicationArea();
+    Result ExistsApplicationArea(bool& has_application_area) const;
+
+    Result GetAll(NFP::NfpData& data) const;
+    Result SetAll(const NFP::NfpData& data);
+    Result BreakTag(NFP::BreakType break_type);
+    Result ReadBackupData(std::span<u8> data) const;
+    Result WriteBackupData(std::span<const u8> data);
+    Result WriteNtf(std::span<const u8> data);
+
+    u64 GetHandle() const;
+    DeviceState GetCurrentState() const;
+    Result GetNpadId(Core::HID::NpadIdType& out_npad_id) const;
+
+    Kernel::KReadableEvent& GetActivateEvent() const;
+    Kernel::KReadableEvent& GetDeactivateEvent() const;
+
+private:
+    void NpadUpdate(Core::HID::ControllerTriggerType type);
+    bool LoadNfcTag(std::span<const u8> data);
+    void CloseNfcTag();
+
+    NFP::AmiiboName GetAmiiboName(const NFP::AmiiboSettings& settings) const;
+    void SetAmiiboName(NFP::AmiiboSettings& settings, const NFP::AmiiboName& amiibo_name);
+    NFP::AmiiboDate GetAmiiboDate(s64 posix_time) const;
+    u64 RemoveVersionByte(u64 application_id) const;
+    void UpdateSettingsCrc();
+    void UpdateRegisterInfoCrc();
+
+    bool is_controller_set{};
+    int callback_key;
+    const Core::HID::NpadIdType npad_id;
+    Core::System& system;
+    Core::HID::EmulatedController* npad_device = nullptr;
+    KernelHelpers::ServiceContext& service_context;
+    Kernel::KEvent* activate_event = nullptr;
+    Kernel::KEvent* deactivate_event = nullptr;
+    Kernel::KEvent* availability_change_event = nullptr;
+
+    bool is_initalized{};
+    NfcProtocol allowed_protocols{};
+    DeviceState device_state{DeviceState::Unavailable};
+
+    // NFP data
+    bool is_data_moddified{};
+    bool is_app_area_open{};
+    bool is_plain_amiibo{};
+    s64 current_posix_time{};
+    NFP::MountTarget mount_target{NFP::MountTarget::None};
+
+    NFP::NTAG215File tag_data{};
+    std::vector<u8> mifare_data{};
+    NFP::EncryptedNTAG215File encrypted_tag_data{};
+};
+
+} // namespace Service::NFC

src/core/hle/service/nfc/common/device_manager.cpp

@@ -0,0 +1,695 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "common/logging/log.h"
+#include "core/core.h"
+#include "core/hid/hid_types.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/service/ipc_helpers.h"
+#include "core/hle/service/nfc/common/device.h"
+#include "core/hle/service/nfc/common/device_manager.h"
+#include "core/hle/service/nfc/nfc_result.h"
+#include "core/hle/service/time/clock_types.h"
+
+namespace Service::NFC {
+
+DeviceManager::DeviceManager(Core::System& system_, KernelHelpers::ServiceContext& service_context_)
+    : system{system_}, service_context{service_context_} {
+
+    availability_change_event =
+        service_context.CreateEvent("Nfc:DeviceManager:AvailabilityChangeEvent");
+
+    for (u32 device_index = 0; device_index < devices.size(); device_index++) {
+        devices[device_index] =
+            std::make_shared<NfcDevice>(Core::HID::IndexToNpadIdType(device_index), system,
+                                        service_context, availability_change_event);
+    }
+
+    is_initialized = false;
+}
+
+DeviceManager ::~DeviceManager() {
+    service_context.CloseEvent(availability_change_event);
+}
+
+Result DeviceManager::Initialize() {
+    for (auto& device : devices) {
+        device->Initialize();
+    }
+    is_initialized = true;
+    return ResultSuccess;
+}
+
+Result DeviceManager::Finalize() {
+    for (auto& device : devices) {
+        device->Finalize();
+    }
+    is_initialized = false;
+    return ResultSuccess;
+}
+
+Result DeviceManager::ListDevices(std::vector<u64>& nfp_devices,
+                                  std::size_t max_allowed_devices) const {
+    for (auto& device : devices) {
+        if (nfp_devices.size() >= max_allowed_devices) {
+            continue;
+        }
+        if (device->GetCurrentState() != DeviceState::Unavailable) {
+            nfp_devices.push_back(device->GetHandle());
+        }
+    }
+
+    if (nfp_devices.empty()) {
+        return ResultDeviceNotFound;
+    }
+
+    return ResultSuccess;
+}
+
+DeviceState DeviceManager::GetDeviceState(u64 device_handle) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    const auto result = GetDeviceFromHandle(device_handle, device, false);
+
+    if (result.IsSuccess()) {
+        return device->GetCurrentState();
+    }
+
+    return DeviceState::Unavailable;
+}
+
+Result DeviceManager::GetNpadId(u64 device_handle, Core::HID::NpadIdType& npad_id) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetNpadId(npad_id);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Kernel::KReadableEvent& DeviceManager::AttachAvailabilityChangeEvent() const {
+    return availability_change_event->GetReadableEvent();
+}
+
+Result DeviceManager::StartDetection(u64 device_handle, NfcProtocol tag_protocol) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->StartDetection(tag_protocol);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::StopDetection(u64 device_handle) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->StopDetection();
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetTagInfo(u64 device_handle, TagInfo& tag_info, bool is_mifare) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetTagInfo(tag_info, is_mifare);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Kernel::KReadableEvent& DeviceManager::AttachActivateEvent(u64 device_handle) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    GetDeviceFromHandle(device_handle, device, false);
+
+    // TODO: Return proper error code on failure
+    return device->GetActivateEvent();
+}
+
+Kernel::KReadableEvent& DeviceManager::AttachDeactivateEvent(u64 device_handle) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    GetDeviceFromHandle(device_handle, device, false);
+
+    // TODO: Return proper error code on failure
+    return device->GetDeactivateEvent();
+}
+
+Result DeviceManager::ReadMifare(u64 device_handle,
+                                 std::span<const MifareReadBlockParameter> read_parameters,
+                                 std::span<MifareReadBlockData> read_data) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->ReadMifare(read_parameters, read_data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::WriteMifare(u64 device_handle,
+                                  std::span<const MifareWriteBlockParameter> write_parameters) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->WriteMifare(write_parameters);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::SendCommandByPassThrough(u64 device_handle,
+                                               const Time::Clock::TimeSpanType& timeout,
+                                               std::span<const u8> command_data,
+                                               std::span<u8> out_data) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->SendCommandByPassThrough(timeout, command_data, out_data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::Mount(u64 device_handle, NFP::ModelType model_type,
+                            NFP::MountTarget mount_target) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->Mount(model_type, mount_target);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::Unmount(u64 device_handle) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->Unmount();
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::OpenApplicationArea(u64 device_handle, u32 access_id) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->OpenApplicationArea(access_id);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetApplicationArea(u64 device_handle, std::span<u8> data) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetApplicationArea(data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::SetApplicationArea(u64 device_handle, std::span<const u8> data) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->SetApplicationArea(data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::Flush(u64 device_handle) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->Flush();
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::Restore(u64 device_handle) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->Restore();
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::CreateApplicationArea(u64 device_handle, u32 access_id,
+                                            std::span<const u8> data) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->CreateApplicationArea(access_id, data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetRegisterInfo(u64 device_handle, NFP::RegisterInfo& register_info) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetRegisterInfo(register_info);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetCommonInfo(u64 device_handle, NFP::CommonInfo& common_info) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetCommonInfo(common_info);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetModelInfo(u64 device_handle, NFP::ModelInfo& model_info) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetModelInfo(model_info);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+u32 DeviceManager::GetApplicationAreaSize() const {
+    return sizeof(NFP::ApplicationArea);
+}
+
+Result DeviceManager::RecreateApplicationArea(u64 device_handle, u32 access_id,
+                                              std::span<const u8> data) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->RecreateApplicationArea(access_id, data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::Format(u64 device_handle) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->Format();
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetAdminInfo(u64 device_handle, NFP::AdminInfo& admin_info) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetAdminInfo(admin_info);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetRegisterInfoPrivate(u64 device_handle,
+                                             NFP::RegisterInfoPrivate& register_info) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetRegisterInfoPrivate(register_info);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::SetRegisterInfoPrivate(u64 device_handle,
+                                             const NFP::RegisterInfoPrivate& register_info) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->SetRegisterInfoPrivate(register_info);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::DeleteRegisterInfo(u64 device_handle) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->DeleteRegisterInfo();
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::DeleteApplicationArea(u64 device_handle) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->DeleteApplicationArea();
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::ExistsApplicationArea(u64 device_handle, bool& has_application_area) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->ExistsApplicationArea(has_application_area);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetAll(u64 device_handle, NFP::NfpData& nfp_data) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->GetAll(nfp_data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::SetAll(u64 device_handle, const NFP::NfpData& nfp_data) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->SetAll(nfp_data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::FlushDebug(u64 device_handle) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->FlushDebug();
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::BreakTag(u64 device_handle, NFP::BreakType break_type) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->BreakTag(break_type);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::ReadBackupData(u64 device_handle, std::span<u8> data) const {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->ReadBackupData(data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::WriteBackupData(u64 device_handle, std::span<const u8> data) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->WriteBackupData(data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::WriteNtf(u64 device_handle, NFP::WriteType, std::span<const u8> data) {
+    std::scoped_lock lock{mutex};
+
+    std::shared_ptr<NfcDevice> device = nullptr;
+    auto result = GetDeviceHandle(device_handle, device);
+
+    if (result.IsSuccess()) {
+        result = device->WriteNtf(data);
+        result = VerifyDeviceResult(device, result);
+    }
+
+    return result;
+}
+
+Result DeviceManager::GetDeviceFromHandle(u64 handle, std::shared_ptr<NfcDevice>& nfc_device,
+                                          bool check_state) const {
+    if (check_state) {
+        const Result is_parameter_set = IsNfcParameterSet();
+        if (is_parameter_set.IsError()) {
+            return is_parameter_set;
+        }
+        const Result is_enabled = IsNfcEnabled();
+        if (is_enabled.IsError()) {
+            return is_enabled;
+        }
+        const Result is_nfc_initialized = IsNfcInitialized();
+        if (is_nfc_initialized.IsError()) {
+            return is_nfc_initialized;
+        }
+    }
+
+    for (auto& device : devices) {
+        if (device->GetHandle() == handle) {
+            nfc_device = device;
+            return ResultSuccess;
+        }
+    }
+
+    return ResultDeviceNotFound;
+}
+
+std::optional<std::shared_ptr<NfcDevice>> DeviceManager::GetNfcDevice(u64 handle) {
+    for (auto& device : devices) {
+        if (device->GetHandle() == handle) {
+            return device;
+        }
+    }
+    return std::nullopt;
+}
+
+const std::optional<std::shared_ptr<NfcDevice>> DeviceManager::GetNfcDevice(u64 handle) const {
+    for (auto& device : devices) {
+        if (device->GetHandle() == handle) {
+            return device;
+        }
+    }
+    return std::nullopt;
+}
+
+Result DeviceManager::GetDeviceHandle(u64 handle, std::shared_ptr<NfcDevice>& device) const {
+    const auto result = GetDeviceFromHandle(handle, device, true);
+    if (result.IsError()) {
+        return result;
+    }
+    return CheckDeviceState(device);
+}
+
+Result DeviceManager::VerifyDeviceResult(std::shared_ptr<NfcDevice> device,
+                                         Result operation_result) const {
+    if (operation_result.IsSuccess()) {
+        return operation_result;
+    }
+
+    const Result is_parameter_set = IsNfcParameterSet();
+    if (is_parameter_set.IsError()) {
+        return is_parameter_set;
+    }
+    const Result is_enabled = IsNfcEnabled();
+    if (is_enabled.IsError()) {
+        return is_enabled;
+    }
+    const Result is_nfc_initialized = IsNfcInitialized();
+    if (is_nfc_initialized.IsError()) {
+        return is_nfc_initialized;
+    }
+    const Result device_state = CheckDeviceState(device);
+    if (device_state.IsError()) {
+        return device_state;
+    }
+
+    return operation_result;
+}
+
+Result DeviceManager::CheckDeviceState(std::shared_ptr<NfcDevice> device) const {
+    if (device == nullptr) {
+        return ResultInvalidArgument;
+    }
+
+    return ResultSuccess;
+}
+
+Result DeviceManager::IsNfcEnabled() const {
+    // TODO: This calls nn::settings::detail::GetNfcEnableFlag
+    const bool is_enabled = true;
+    if (!is_enabled) {
+        return ResultNfcDisabled;
+    }
+    return ResultSuccess;
+}
+
+Result DeviceManager::IsNfcParameterSet() const {
+    // TODO: This calls checks against a bool on offset 0x450
+    const bool is_set = true;
+    if (!is_set) {
+        return ResultUnknown76;
+    }
+    return ResultSuccess;
+}
+
+Result DeviceManager::IsNfcInitialized() const {
+    if (!is_initialized) {
+        return ResultNfcNotInitialized;
+    }
+    return ResultSuccess;
+}
+
+} // namespace Service::NFC

src/core/hle/service/nfc/common/device_manager.h

@@ -0,0 +1,100 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <array>
+#include <memory>
+#include <optional>
+#include <span>
+
+#include "core/hid/hid_types.h"
+#include "core/hle/service/kernel_helpers.h"
+#include "core/hle/service/nfc/mifare_types.h"
+#include "core/hle/service/nfc/nfc_types.h"
+#include "core/hle/service/nfp/nfp_types.h"
+#include "core/hle/service/service.h"
+#include "core/hle/service/time/clock_types.h"
+
+namespace Service::NFC {
+class NfcDevice;
+
+class DeviceManager {
+public:
+    explicit DeviceManager(Core::System& system_, KernelHelpers::ServiceContext& service_context_);
+    ~DeviceManager();
+
+    // Nfc device manager
+    Result Initialize();
+    Result Finalize();
+    Result ListDevices(std::vector<u64>& nfp_devices, std::size_t max_allowed_devices) const;
+    DeviceState GetDeviceState(u64 device_handle) const;
+    Result GetNpadId(u64 device_handle, Core::HID::NpadIdType& npad_id) const;
+    Kernel::KReadableEvent& AttachAvailabilityChangeEvent() const;
+    Result StartDetection(u64 device_handle, NfcProtocol tag_protocol);
+    Result StopDetection(u64 device_handle);
+    Result GetTagInfo(u64 device_handle, NFP::TagInfo& tag_info, bool is_mifare) const;
+    Kernel::KReadableEvent& AttachActivateEvent(u64 device_handle) const;
+    Kernel::KReadableEvent& AttachDeactivateEvent(u64 device_handle) const;
+    Result ReadMifare(u64 device_handle,
+                      const std::span<const MifareReadBlockParameter> read_parameters,
+                      std::span<MifareReadBlockData> read_data);
+    Result WriteMifare(u64 device_handle,
+                       std::span<const MifareWriteBlockParameter> write_parameters);
+    Result SendCommandByPassThrough(u64 device_handle, const Time::Clock::TimeSpanType& timeout,
+                                    std::span<const u8> command_data, std::span<u8> out_data);
+
+    // Nfp device manager
+    Result Mount(u64 device_handle, NFP::ModelType model_type, NFP::MountTarget mount_target);
+    Result Unmount(u64 device_handle);
+    Result OpenApplicationArea(u64 device_handle, u32 access_id);
+    Result GetApplicationArea(u64 device_handle, std::span<u8> data) const;
+    Result SetApplicationArea(u64 device_handle, std::span<const u8> data);
+    Result Flush(u64 device_handle);
+    Result Restore(u64 device_handle);
+    Result CreateApplicationArea(u64 device_handle, u32 access_id, std::span<const u8> data);
+    Result GetRegisterInfo(u64 device_handle, NFP::RegisterInfo& register_info) const;
+    Result GetCommonInfo(u64 device_handle, NFP::CommonInfo& common_info) const;
+    Result GetModelInfo(u64 device_handle, NFP::ModelInfo& model_info) const;
+    u32 GetApplicationAreaSize() const;
+    Result RecreateApplicationArea(u64 device_handle, u32 access_id, std::span<const u8> data);
+    Result Format(u64 device_handle);
+    Result GetAdminInfo(u64 device_handle, NFP::AdminInfo& admin_info) const;
+    Result GetRegisterInfoPrivate(u64 device_handle, NFP::RegisterInfoPrivate& register_info) const;
+    Result SetRegisterInfoPrivate(u64 device_handle, const NFP::RegisterInfoPrivate& register_info);
+    Result DeleteRegisterInfo(u64 device_handle);
+    Result DeleteApplicationArea(u64 device_handle);
+    Result ExistsApplicationArea(u64 device_handle, bool& has_application_area) const;
+    Result GetAll(u64 device_handle, NFP::NfpData& nfp_data) const;
+    Result SetAll(u64 device_handle, const NFP::NfpData& nfp_data);
+    Result FlushDebug(u64 device_handle);
+    Result BreakTag(u64 device_handle, NFP::BreakType break_type);
+    Result ReadBackupData(u64 device_handle, std::span<u8> data) const;
+    Result WriteBackupData(u64 device_handle, std::span<const u8> data);
+    Result WriteNtf(u64 device_handle, NFP::WriteType, std::span<const u8> data);
+
+private:
+    Result IsNfcEnabled() const;
+    Result IsNfcParameterSet() const;
+    Result IsNfcInitialized() const;
+
+    Result GetDeviceFromHandle(u64 handle, std::shared_ptr<NfcDevice>& device,
+                               bool check_state) const;
+
+    Result GetDeviceHandle(u64 handle, std::shared_ptr<NfcDevice>& device) const;
+    Result VerifyDeviceResult(std::shared_ptr<NfcDevice> device, Result operation_result) const;
+    Result CheckDeviceState(std::shared_ptr<NfcDevice> device) const;
+
+    std::optional<std::shared_ptr<NfcDevice>> GetNfcDevice(u64 handle);
+    const std::optional<std::shared_ptr<NfcDevice>> GetNfcDevice(u64 handle) const;
+
+    bool is_initialized = false;
+    mutable std::mutex mutex;
+    std::array<std::shared_ptr<NfcDevice>, 10> devices{};
+
+    Core::System& system;
+    KernelHelpers::ServiceContext service_context;
+    Kernel::KEvent* availability_change_event;
+};
+
+} // namespace Service::NFC