6 files changed, 2693 insertions, 0 deletions

diff --git a/src/core/hle/service/nfc/common/amiibo_crypto.cpp b/src/core/hle/service/nfc/common/amiibo_crypto.cpp
new file mode 100644
index 000000000..f3901ee8d
--- /dev/null
+++ b/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
diff --git a/src/core/hle/service/nfc/common/amiibo_crypto.h b/src/core/hle/service/nfc/common/amiibo_crypto.h
new file mode 100644
index 000000000..bf3044ed9
--- /dev/null
+++ b/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
diff --git a/src/core/hle/service/nfc/common/device.cpp b/src/core/hle/service/nfc/common/device.cpp
new file mode 100644
index 000000000..e5de65ce0
--- /dev/null
+++ b/src/core/hle/service/nfc/common/device.cpp
@@ -0,0 +1,1249 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4701) // Potentially uninitialized local variable 'result' used
+#endif
+
+#include <boost/crc.hpp>
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+#include "common/input.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "common/tiny_mt.h"
+#include "core/core.h"
+#include "core/hid/emulated_controller.h"
+#include "core/hid/hid_core.h"
+#include "core/hid/hid_types.h"
+#include "core/hle/kernel/k_event.h"
+#include "core/hle/service/ipc_helpers.h"
+#include "core/hle/service/mii/mii_manager.h"
+#include "core/hle/service/mii/types.h"
+#include "core/hle/service/nfc/common/amiibo_crypto.h"
+#include "core/hle/service/nfc/common/device.h"
+#include "core/hle/service/nfc/mifare_result.h"
+#include "core/hle/service/nfc/nfc_result.h"
+#include "core/hle/service/time/time_manager.h"
+#include "core/hle/service/time/time_zone_content_manager.h"
+#include "core/hle/service/time/time_zone_types.h"
+
+namespace Service::NFC {
+NfcDevice::NfcDevice(Core::HID::NpadIdType npad_id_, Core::System& system_,
+                     KernelHelpers::ServiceContext& service_context_,
+                     Kernel::KEvent* availability_change_event_)
+    : npad_id{npad_id_}, system{system_}, service_context{service_context_},
+      availability_change_event{availability_change_event_} {
+    activate_event = service_context.CreateEvent("NFC:ActivateEvent");
+    deactivate_event = service_context.CreateEvent("NFC:DeactivateEvent");
+    npad_device = system.HIDCore().GetEmulatedController(npad_id);
+
+    Core::HID::ControllerUpdateCallback engine_callback{
+        .on_change = [this](Core::HID::ControllerTriggerType type) { NpadUpdate(type); },
+        .is_npad_service = false,
+    };
+    is_controller_set = true;
+    callback_key = npad_device->SetCallback(engine_callback);
+
+    auto& standard_steady_clock{system.GetTimeManager().GetStandardSteadyClockCore()};
+    current_posix_time = standard_steady_clock.GetCurrentTimePoint(system).time_point;
+}
+
+NfcDevice::~NfcDevice() {
+    service_context.CloseEvent(activate_event);
+    service_context.CloseEvent(deactivate_event);
+    if (!is_controller_set) {
+        return;
+    }
+    npad_device->DeleteCallback(callback_key);
+    is_controller_set = false;
+};
+
+void NfcDevice::NpadUpdate(Core::HID::ControllerTriggerType type) {
+    if (!is_initalized) {
+        return;
+    }
+
+    if (type == Core::HID::ControllerTriggerType::Connected) {
+        Initialize();
+        availability_change_event->Signal();
+        return;
+    }
+
+    if (type == Core::HID::ControllerTriggerType::Disconnected) {
+        device_state = DeviceState::Unavailable;
+        availability_change_event->Signal();
+        return;
+    }
+
+    if (type != Core::HID::ControllerTriggerType::Nfc) {
+        return;
+    }
+
+    if (!npad_device->IsConnected()) {
+        return;
+    }
+
+    const auto nfc_status = npad_device->GetNfc();
+    switch (nfc_status.state) {
+    case Common::Input::NfcState::NewAmiibo:
+        LoadNfcTag(nfc_status.data);
+        break;
+    case Common::Input::NfcState::AmiiboRemoved:
+        if (device_state == DeviceState::Initialized || device_state == DeviceState::TagRemoved) {
+            break;
+        }
+        if (device_state != DeviceState::SearchingForTag) {
+            CloseNfcTag();
+        }
+        break;
+    default:
+        break;
+    }
+}
+
+bool NfcDevice::LoadNfcTag(std::span<const u8> data) {
+    if (device_state != DeviceState::SearchingForTag) {
+        LOG_ERROR(Service_NFC, "Game is not looking for nfc tag, current state {}", device_state);
+        return false;
+    }
+
+    if (data.size() < sizeof(NFP::EncryptedNTAG215File)) {
+        LOG_ERROR(Service_NFC, "Not an amiibo, size={}", data.size());
+        return false;
+    }
+
+    mifare_data.resize(data.size());
+    memcpy(mifare_data.data(), data.data(), data.size());
+
+    memcpy(&tag_data, data.data(), sizeof(NFP::EncryptedNTAG215File));
+    is_plain_amiibo = NFP::AmiiboCrypto::IsAmiiboValid(tag_data);
+
+    if (is_plain_amiibo) {
+        encrypted_tag_data = NFP::AmiiboCrypto::EncodedDataToNfcData(tag_data);
+        LOG_INFO(Service_NFP, "Using plain amiibo");
+    } else {
+        tag_data = {};
+        memcpy(&encrypted_tag_data, data.data(), sizeof(NFP::EncryptedNTAG215File));
+    }
+
+    device_state = DeviceState::TagFound;
+    deactivate_event->GetReadableEvent().Clear();
+    activate_event->Signal();
+    return true;
+}
+
+void NfcDevice::CloseNfcTag() {
+    LOG_INFO(Service_NFC, "Remove nfc tag");
+
+    if (device_state == DeviceState::TagMounted) {
+        Unmount();
+    }
+
+    device_state = DeviceState::TagRemoved;
+    encrypted_tag_data = {};
+    tag_data = {};
+    mifare_data = {};
+    activate_event->GetReadableEvent().Clear();
+    deactivate_event->Signal();
+}
+
+Kernel::KReadableEvent& NfcDevice::GetActivateEvent() const {
+    return activate_event->GetReadableEvent();
+}
+
+Kernel::KReadableEvent& NfcDevice::GetDeactivateEvent() const {
+    return deactivate_event->GetReadableEvent();
+}
+
+void NfcDevice::Initialize() {
+    device_state = npad_device->HasNfc() ? DeviceState::Initialized : DeviceState::Unavailable;
+    encrypted_tag_data = {};
+    tag_data = {};
+    mifare_data = {};
+    is_initalized = true;
+}
+
+void NfcDevice::Finalize() {
+    if (device_state == DeviceState::TagMounted) {
+        Unmount();
+    }
+    if (device_state == DeviceState::SearchingForTag || device_state == DeviceState::TagRemoved) {
+        StopDetection();
+    }
+    device_state = DeviceState::Unavailable;
+    is_initalized = false;
+}
+
+Result NfcDevice::StartDetection(NfcProtocol allowed_protocol) {
+    if (device_state != DeviceState::Initialized && device_state != DeviceState::TagRemoved) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (npad_device->SetPollingMode(Core::HID::EmulatedDeviceIndex::RightIndex,
+                                    Common::Input::PollingMode::NFC) !=
+        Common::Input::DriverResult::Success) {
+        LOG_ERROR(Service_NFC, "Nfc not supported");
+        return ResultNfcDisabled;
+    }
+
+    device_state = DeviceState::SearchingForTag;
+    allowed_protocols = allowed_protocol;
+    return ResultSuccess;
+}
+
+Result NfcDevice::StopDetection() {
+    npad_device->SetPollingMode(Core::HID::EmulatedDeviceIndex::RightIndex,
+                                Common::Input::PollingMode::Active);
+
+    if (device_state == DeviceState::Initialized) {
+        return ResultSuccess;
+    }
+
+    if (device_state == DeviceState::TagFound || device_state == DeviceState::TagMounted) {
+        CloseNfcTag();
+    }
+
+    if (device_state == DeviceState::SearchingForTag || device_state == DeviceState::TagRemoved) {
+        device_state = DeviceState::Initialized;
+        return ResultSuccess;
+    }
+
+    LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+    return ResultWrongDeviceState;
+}
+
+Result NfcDevice::GetTagInfo(NFP::TagInfo& tag_info, bool is_mifare) const {
+    if (device_state != DeviceState::TagFound && device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (is_mifare) {
+        tag_info = {
+            .uuid = encrypted_tag_data.uuid.uid,
+            .uuid_extension = {},
+            .uuid_length = static_cast<u8>(encrypted_tag_data.uuid.uid.size()),
+            .protocol = NfcProtocol::TypeA,
+            .tag_type = TagType::Type4,
+        };
+        return ResultSuccess;
+    }
+
+    // Protocol and tag type may change here
+    tag_info = {
+        .uuid = encrypted_tag_data.uuid.uid,
+        .uuid_extension = {},
+        .uuid_length = static_cast<u8>(encrypted_tag_data.uuid.uid.size()),
+        .protocol = NfcProtocol::TypeA,
+        .tag_type = TagType::Type2,
+    };
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::ReadMifare(std::span<const MifareReadBlockParameter> parameters,
+                             std::span<MifareReadBlockData> read_block_data) const {
+    Result result = ResultSuccess;
+
+    for (std::size_t i = 0; i < parameters.size(); i++) {
+        result = ReadMifare(parameters[i], read_block_data[i]);
+        if (result.IsError()) {
+            break;
+        }
+    }
+
+    return result;
+}
+
+Result NfcDevice::ReadMifare(const MifareReadBlockParameter& parameter,
+                             MifareReadBlockData& read_block_data) const {
+    const std::size_t sector_index = parameter.sector_number * sizeof(DataBlock);
+    read_block_data.sector_number = parameter.sector_number;
+
+    if (device_state != DeviceState::TagFound && device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mifare_data.size() < sector_index + sizeof(DataBlock)) {
+        return Mifare::ResultReadError;
+    }
+
+    // TODO: Use parameter.sector_key to read encrypted data
+    memcpy(read_block_data.data.data(), mifare_data.data() + sector_index, sizeof(DataBlock));
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::WriteMifare(std::span<const MifareWriteBlockParameter> parameters) {
+    Result result = ResultSuccess;
+
+    for (std::size_t i = 0; i < parameters.size(); i++) {
+        result = WriteMifare(parameters[i]);
+        if (result.IsError()) {
+            break;
+        }
+    }
+
+    if (!npad_device->WriteNfc(mifare_data)) {
+        LOG_ERROR(Service_NFP, "Error writing to file");
+        return Mifare::ResultReadError;
+    }
+
+    return result;
+}
+
+Result NfcDevice::WriteMifare(const MifareWriteBlockParameter& parameter) {
+    const std::size_t sector_index = parameter.sector_number * sizeof(DataBlock);
+
+    if (device_state != DeviceState::TagFound && device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mifare_data.size() < sector_index + sizeof(DataBlock)) {
+        return Mifare::ResultReadError;
+    }
+
+    // TODO: Use parameter.sector_key to encrypt the data
+    memcpy(mifare_data.data() + sector_index, parameter.data.data(), sizeof(DataBlock));
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::SendCommandByPassThrough(const Time::Clock::TimeSpanType& timeout,
+                                           std::span<const u8> command_data,
+                                           std::span<u8> out_data) {
+    // Not implemented
+    return ResultSuccess;
+}
+
+Result NfcDevice::Mount(NFP::ModelType model_type, NFP::MountTarget mount_target_) {
+    if (device_state != DeviceState::TagFound) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    // The loaded amiibo is not encrypted
+    if (is_plain_amiibo) {
+        device_state = DeviceState::TagMounted;
+        mount_target = mount_target_;
+        return ResultSuccess;
+    }
+
+    if (!NFP::AmiiboCrypto::IsAmiiboValid(encrypted_tag_data)) {
+        LOG_ERROR(Service_NFP, "Not an amiibo");
+        return ResultNotAnAmiibo;
+    }
+
+    // Mark amiibos as read only when keys are missing
+    if (!NFP::AmiiboCrypto::IsKeyAvailable()) {
+        LOG_ERROR(Service_NFP, "No keys detected");
+        device_state = DeviceState::TagMounted;
+        mount_target = NFP::MountTarget::Rom;
+        return ResultSuccess;
+    }
+
+    if (!NFP::AmiiboCrypto::DecodeAmiibo(encrypted_tag_data, tag_data)) {
+        LOG_ERROR(Service_NFP, "Can't decode amiibo {}", device_state);
+        return ResultCorruptedData;
+    }
+
+    device_state = DeviceState::TagMounted;
+    mount_target = mount_target_;
+    return ResultSuccess;
+}
+
+Result NfcDevice::Unmount() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    // Save data before unloading the amiibo
+    if (is_data_moddified) {
+        Flush();
+    }
+
+    device_state = DeviceState::TagFound;
+    mount_target = NFP::MountTarget::None;
+    is_app_area_open = false;
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::Flush() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    auto& settings = tag_data.settings;
+
+    const auto& current_date = GetAmiiboDate(current_posix_time);
+    if (settings.write_date.raw_date != current_date.raw_date) {
+        settings.write_date = current_date;
+        UpdateSettingsCrc();
+    }
+
+    tag_data.write_counter++;
+
+    FlushWithBreak(NFP::BreakType::Normal);
+
+    is_data_moddified = false;
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::FlushDebug() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    tag_data.write_counter++;
+
+    FlushWithBreak(NFP::BreakType::Normal);
+
+    is_data_moddified = false;
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::FlushWithBreak(NFP::BreakType break_type) {
+    if (break_type != NFP::BreakType::Normal) {
+        LOG_ERROR(Service_NFC, "Break type not implemented {}", break_type);
+        return ResultWrongDeviceState;
+    }
+
+    std::vector<u8> data(sizeof(NFP::EncryptedNTAG215File));
+    if (is_plain_amiibo) {
+        memcpy(data.data(), &tag_data, sizeof(tag_data));
+    } else {
+        if (!NFP::AmiiboCrypto::EncodeAmiibo(tag_data, encrypted_tag_data)) {
+            LOG_ERROR(Service_NFP, "Failed to encode data");
+            return ResultWriteAmiiboFailed;
+        }
+
+        memcpy(data.data(), &encrypted_tag_data, sizeof(encrypted_tag_data));
+    }
+
+    if (!npad_device->WriteNfc(data)) {
+        LOG_ERROR(Service_NFP, "Error writing to file");
+        return ResultWriteAmiiboFailed;
+    }
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::Restore() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    // TODO: Load amiibo from backup on system
+    LOG_ERROR(Service_NFP, "Not Implemented");
+    return ResultSuccess;
+}
+
+Result NfcDevice::GetCommonInfo(NFP::CommonInfo& common_info) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    const auto& settings = tag_data.settings;
+
+    // TODO: Validate this data
+    common_info = {
+        .last_write_date = settings.write_date.GetWriteDate(),
+        .write_counter = tag_data.write_counter,
+        .version = tag_data.amiibo_version,
+        .application_area_size = sizeof(NFP::ApplicationArea),
+    };
+    return ResultSuccess;
+}
+
+Result NfcDevice::GetModelInfo(NFP::ModelInfo& model_info) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    const auto& model_info_data = encrypted_tag_data.user_memory.model_info;
+    model_info = {
+        .character_id = model_info_data.character_id,
+        .character_variant = model_info_data.character_variant,
+        .amiibo_type = model_info_data.amiibo_type,
+        .model_number = model_info_data.model_number,
+        .series = model_info_data.series,
+    };
+    return ResultSuccess;
+}
+
+Result NfcDevice::GetRegisterInfo(NFP::RegisterInfo& register_info) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.amiibo_initialized == 0) {
+        return ResultRegistrationIsNotInitialized;
+    }
+
+    Service::Mii::MiiManager manager;
+    const auto& settings = tag_data.settings;
+
+    // TODO: Validate this data
+    register_info = {
+        .mii_char_info = manager.ConvertV3ToCharInfo(tag_data.owner_mii),
+        .creation_date = settings.init_date.GetWriteDate(),
+        .amiibo_name = GetAmiiboName(settings),
+        .font_region = settings.settings.font_region,
+    };
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::GetRegisterInfoPrivate(NFP::RegisterInfoPrivate& register_info) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.amiibo_initialized == 0) {
+        return ResultRegistrationIsNotInitialized;
+    }
+
+    Service::Mii::MiiManager manager;
+    const auto& settings = tag_data.settings;
+
+    // TODO: Validate and complete this data
+    register_info = {
+        .mii_store_data = {},
+        .creation_date = settings.init_date.GetWriteDate(),
+        .amiibo_name = GetAmiiboName(settings),
+        .font_region = settings.settings.font_region,
+    };
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::GetAdminInfo(NFP::AdminInfo& admin_info) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    u8 flags = static_cast<u8>(tag_data.settings.settings.raw >> 0x4);
+    if (tag_data.settings.settings.amiibo_initialized == 0) {
+        flags = flags & 0xfe;
+    }
+
+    u64 application_id = 0;
+    u32 application_area_id = 0;
+    NFP::AppAreaVersion app_area_version = NFP::AppAreaVersion::NotSet;
+    if (tag_data.settings.settings.appdata_initialized != 0) {
+        application_id = tag_data.application_id;
+        app_area_version = static_cast<NFP::AppAreaVersion>(
+            application_id >> NFP::application_id_version_offset & 0xf);
+
+        // Restore application id to original value
+        if (application_id >> 0x38 != 0) {
+            const u8 application_byte = tag_data.application_id_byte & 0xf;
+            application_id =
+                RemoveVersionByte(application_id) |
+                (static_cast<u64>(application_byte) << NFP::application_id_version_offset);
+        }
+
+        application_area_id = tag_data.application_area_id;
+    }
+
+    // TODO: Validate this data
+    admin_info = {
+        .application_id = application_id,
+        .application_area_id = application_area_id,
+        .crc_change_counter = tag_data.settings.crc_counter,
+        .flags = flags,
+        .tag_type = PackedTagType::Type2,
+        .app_area_version = app_area_version,
+    };
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::DeleteRegisterInfo() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.amiibo_initialized == 0) {
+        return ResultRegistrationIsNotInitialized;
+    }
+
+    Common::TinyMT rng{};
+    rng.GenerateRandomBytes(&tag_data.owner_mii, sizeof(tag_data.owner_mii));
+    rng.GenerateRandomBytes(&tag_data.settings.amiibo_name, sizeof(tag_data.settings.amiibo_name));
+    rng.GenerateRandomBytes(&tag_data.unknown, sizeof(u8));
+    rng.GenerateRandomBytes(&tag_data.unknown2[0], sizeof(u32));
+    rng.GenerateRandomBytes(&tag_data.unknown2[1], sizeof(u32));
+    rng.GenerateRandomBytes(&tag_data.register_info_crc, sizeof(u32));
+    rng.GenerateRandomBytes(&tag_data.settings.init_date, sizeof(u32));
+    tag_data.settings.settings.font_region.Assign(0);
+    tag_data.settings.settings.amiibo_initialized.Assign(0);
+
+    return Flush();
+}
+
+Result NfcDevice::SetRegisterInfoPrivate(const NFP::RegisterInfoPrivate& register_info) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    Service::Mii::MiiManager manager;
+    const auto mii = manager.BuildDefault(0);
+    auto& settings = tag_data.settings;
+
+    if (tag_data.settings.settings.amiibo_initialized == 0) {
+        settings.init_date = GetAmiiboDate(current_posix_time);
+        settings.write_date.raw_date = 0;
+    }
+
+    SetAmiiboName(settings, register_info.amiibo_name);
+    tag_data.owner_mii = manager.BuildFromStoreData(mii);
+    tag_data.mii_extension = manager.SetFromStoreData(mii);
+    tag_data.unknown = 0;
+    tag_data.unknown2 = {};
+    settings.country_code_id = 0;
+    settings.settings.font_region.Assign(0);
+    settings.settings.amiibo_initialized.Assign(1);
+
+    UpdateRegisterInfoCrc();
+
+    return Flush();
+}
+
+Result NfcDevice::RestoreAmiibo() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    // TODO: Load amiibo from backup on system
+    LOG_ERROR(Service_NFP, "Not Implemented");
+    return ResultSuccess;
+}
+
+Result NfcDevice::Format() {
+    auto result1 = DeleteApplicationArea();
+    auto result2 = DeleteRegisterInfo();
+
+    if (result1.IsError()) {
+        return result1;
+    }
+
+    if (result2.IsError()) {
+        return result2;
+    }
+
+    return Flush();
+}
+
+Result NfcDevice::OpenApplicationArea(u32 access_id) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
+        LOG_WARNING(Service_NFP, "Application area is not initialized");
+        return ResultApplicationAreaIsNotInitialized;
+    }
+
+    if (tag_data.application_area_id != access_id) {
+        LOG_WARNING(Service_NFP, "Wrong application area id");
+        return ResultWrongApplicationAreaId;
+    }
+
+    is_app_area_open = true;
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::GetApplicationAreaId(u32& application_area_id) const {
+    application_area_id = {};
+
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
+        LOG_WARNING(Service_NFP, "Application area is not initialized");
+        return ResultApplicationAreaIsNotInitialized;
+    }
+
+    application_area_id = tag_data.application_area_id;
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::GetApplicationArea(std::span<u8> data) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (!is_app_area_open) {
+        LOG_ERROR(Service_NFP, "Application area is not open");
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
+        LOG_ERROR(Service_NFP, "Application area is not initialized");
+        return ResultApplicationAreaIsNotInitialized;
+    }
+
+    memcpy(data.data(), tag_data.application_area.data(),
+           std::min(data.size(), sizeof(NFP::ApplicationArea)));
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::SetApplicationArea(std::span<const u8> data) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (!is_app_area_open) {
+        LOG_ERROR(Service_NFP, "Application area is not open");
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() == 0) {
+        LOG_ERROR(Service_NFP, "Application area is not initialized");
+        return ResultApplicationAreaIsNotInitialized;
+    }
+
+    if (data.size() > sizeof(NFP::ApplicationArea)) {
+        LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
+        return ResultUnknown;
+    }
+
+    Common::TinyMT rng{};
+    std::memcpy(tag_data.application_area.data(), data.data(), data.size());
+    // Fill remaining data with random numbers
+    rng.GenerateRandomBytes(tag_data.application_area.data() + data.size(),
+                            sizeof(NFP::ApplicationArea) - data.size());
+
+    if (tag_data.application_write_counter != NFP::counter_limit) {
+        tag_data.application_write_counter++;
+    }
+
+    is_data_moddified = true;
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::CreateApplicationArea(u32 access_id, std::span<const u8> data) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized.Value() != 0) {
+        LOG_ERROR(Service_NFP, "Application area already exist");
+        return ResultApplicationAreaExist;
+    }
+
+    return RecreateApplicationArea(access_id, data);
+}
+
+Result NfcDevice::RecreateApplicationArea(u32 access_id, std::span<const u8> data) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (is_app_area_open) {
+        LOG_ERROR(Service_NFP, "Application area is open");
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (data.size() > sizeof(NFP::ApplicationArea)) {
+        LOG_ERROR(Service_NFP, "Wrong data size {}", data.size());
+        return ResultWrongApplicationAreaSize;
+    }
+
+    Common::TinyMT rng{};
+    std::memcpy(tag_data.application_area.data(), data.data(), data.size());
+    // Fill remaining data with random numbers
+    rng.GenerateRandomBytes(tag_data.application_area.data() + data.size(),
+                            sizeof(NFP::ApplicationArea) - data.size());
+
+    if (tag_data.application_write_counter != NFP::counter_limit) {
+        tag_data.application_write_counter++;
+    }
+
+    const u64 application_id = system.GetApplicationProcessProgramID();
+
+    tag_data.application_id_byte =
+        static_cast<u8>(application_id >> NFP::application_id_version_offset & 0xf);
+    tag_data.application_id =
+        RemoveVersionByte(application_id) | (static_cast<u64>(NFP::AppAreaVersion::NintendoSwitch)
+                                             << NFP::application_id_version_offset);
+    tag_data.settings.settings.appdata_initialized.Assign(1);
+    tag_data.application_area_id = access_id;
+    tag_data.unknown = {};
+    tag_data.unknown2 = {};
+
+    UpdateRegisterInfoCrc();
+
+    return Flush();
+}
+
+Result NfcDevice::DeleteApplicationArea() {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFP, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFP, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    if (tag_data.settings.settings.appdata_initialized == 0) {
+        return ResultApplicationAreaIsNotInitialized;
+    }
+
+    if (tag_data.application_write_counter != NFP::counter_limit) {
+        tag_data.application_write_counter++;
+    }
+
+    Common::TinyMT rng{};
+    rng.GenerateRandomBytes(tag_data.application_area.data(), sizeof(NFP::ApplicationArea));
+    rng.GenerateRandomBytes(&tag_data.application_id, sizeof(u64));
+    rng.GenerateRandomBytes(&tag_data.application_area_id, sizeof(u32));
+    rng.GenerateRandomBytes(&tag_data.application_id_byte, sizeof(u8));
+    tag_data.settings.settings.appdata_initialized.Assign(0);
+    tag_data.unknown = {};
+    tag_data.unknown2 = {};
+    is_app_area_open = false;
+
+    UpdateRegisterInfoCrc();
+
+    return Flush();
+}
+
+Result NfcDevice::ExistsApplicationArea(bool& has_application_area) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    has_application_area = tag_data.settings.settings.appdata_initialized.Value() != 0;
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::GetAll(NFP::NfpData& data) const {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    NFP::CommonInfo common_info{};
+    Service::Mii::MiiManager manager;
+    const u64 application_id = tag_data.application_id;
+
+    GetCommonInfo(common_info);
+
+    data = {
+        .magic = tag_data.constant_value,
+        .write_counter = tag_data.write_counter,
+        .settings_crc = tag_data.settings.crc,
+        .common_info = common_info,
+        .mii_char_info = tag_data.owner_mii,
+        .mii_store_data_extension = tag_data.mii_extension,
+        .creation_date = tag_data.settings.init_date.GetWriteDate(),
+        .amiibo_name = tag_data.settings.amiibo_name,
+        .amiibo_name_null_terminated = 0,
+        .settings = tag_data.settings.settings,
+        .unknown1 = tag_data.unknown,
+        .register_info_crc = tag_data.register_info_crc,
+        .unknown2 = tag_data.unknown2,
+        .application_id = application_id,
+        .access_id = tag_data.application_area_id,
+        .settings_crc_counter = tag_data.settings.crc_counter,
+        .font_region = tag_data.settings.settings.font_region,
+        .tag_type = PackedTagType::Type2,
+        .console_type = static_cast<NFP::AppAreaVersion>(
+            application_id >> NFP::application_id_version_offset & 0xf),
+        .application_id_byte = tag_data.application_id_byte,
+        .application_area = tag_data.application_area,
+    };
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::SetAll(const NFP::NfpData& data) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    tag_data.constant_value = data.magic;
+    tag_data.write_counter = data.write_counter;
+    tag_data.settings.crc = data.settings_crc;
+    tag_data.settings.write_date.SetWriteDate(data.common_info.last_write_date);
+    tag_data.write_counter = data.common_info.write_counter;
+    tag_data.amiibo_version = data.common_info.version;
+    tag_data.owner_mii = data.mii_char_info;
+    tag_data.mii_extension = data.mii_store_data_extension;
+    tag_data.settings.init_date.SetWriteDate(data.creation_date);
+    tag_data.settings.amiibo_name = data.amiibo_name;
+    tag_data.settings.settings = data.settings;
+    tag_data.unknown = data.unknown1;
+    tag_data.register_info_crc = data.register_info_crc;
+    tag_data.unknown2 = data.unknown2;
+    tag_data.application_id = data.application_id;
+    tag_data.application_area_id = data.access_id;
+    tag_data.settings.crc_counter = data.settings_crc_counter;
+    tag_data.settings.settings.font_region.Assign(data.font_region);
+    tag_data.application_id_byte = data.application_id_byte;
+    tag_data.application_area = data.application_area;
+
+    return ResultSuccess;
+}
+
+Result NfcDevice::BreakTag(NFP::BreakType break_type) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    // TODO: Complete this implementation
+
+    return FlushWithBreak(break_type);
+}
+
+Result NfcDevice::ReadBackupData(std::span<u8> data) const {
+    // Not implemented
+    return ResultSuccess;
+}
+
+Result NfcDevice::WriteBackupData(std::span<const u8> data) {
+    // Not implemented
+    return ResultSuccess;
+}
+
+Result NfcDevice::WriteNtf(std::span<const u8> data) {
+    if (device_state != DeviceState::TagMounted) {
+        LOG_ERROR(Service_NFC, "Wrong device state {}", device_state);
+        if (device_state == DeviceState::TagRemoved) {
+            return ResultTagRemoved;
+        }
+        return ResultWrongDeviceState;
+    }
+
+    if (mount_target == NFP::MountTarget::None || mount_target == NFP::MountTarget::Rom) {
+        LOG_ERROR(Service_NFC, "Amiibo is read only", device_state);
+        return ResultWrongDeviceState;
+    }
+
+    // Not implemented
+
+    return ResultSuccess;
+}
+
+NFP::AmiiboName NfcDevice::GetAmiiboName(const NFP::AmiiboSettings& settings) const {
+    std::array<char16_t, NFP::amiibo_name_length> settings_amiibo_name{};
+    NFP::AmiiboName amiibo_name{};
+
+    // Convert from big endian to little endian
+    for (std::size_t i = 0; i < NFP::amiibo_name_length; i++) {
+        settings_amiibo_name[i] = static_cast<u16>(settings.amiibo_name[i]);
+    }
+
+    // Convert from utf16 to utf8
+    const auto amiibo_name_utf8 = Common::UTF16ToUTF8(settings_amiibo_name.data());
+    memcpy(amiibo_name.data(), amiibo_name_utf8.data(), amiibo_name_utf8.size());
+
+    return amiibo_name;
+}
+
+void NfcDevice::SetAmiiboName(NFP::AmiiboSettings& settings, const NFP::AmiiboName& amiibo_name) {
+    std::array<char16_t, NFP::amiibo_name_length> settings_amiibo_name{};
+
+    // Convert from utf8 to utf16
+    const auto amiibo_name_utf16 = Common::UTF8ToUTF16(amiibo_name.data());
+    memcpy(settings_amiibo_name.data(), amiibo_name_utf16.data(),
+           amiibo_name_utf16.size() * sizeof(char16_t));
+
+    // Convert from little endian to big endian
+    for (std::size_t i = 0; i < NFP::amiibo_name_length; i++) {
+        settings.amiibo_name[i] = static_cast<u16_be>(settings_amiibo_name[i]);
+    }
+}
+
+NFP::AmiiboDate NfcDevice::GetAmiiboDate(s64 posix_time) const {
+    const auto& time_zone_manager =
+        system.GetTimeManager().GetTimeZoneContentManager().GetTimeZoneManager();
+    Time::TimeZone::CalendarInfo calendar_info{};
+    NFP::AmiiboDate amiibo_date{};
+
+    amiibo_date.SetYear(2000);
+    amiibo_date.SetMonth(1);
+    amiibo_date.SetDay(1);
+
+    if (time_zone_manager.ToCalendarTime({}, posix_time, calendar_info) == ResultSuccess) {
+        amiibo_date.SetYear(calendar_info.time.year);
+        amiibo_date.SetMonth(calendar_info.time.month);
+        amiibo_date.SetDay(calendar_info.time.day);
+    }
+
+    return amiibo_date;
+}
+
+u64 NfcDevice::RemoveVersionByte(u64 application_id) const {
+    return application_id & ~(0xfULL << NFP::application_id_version_offset);
+}
+
+void NfcDevice::UpdateSettingsCrc() {
+    auto& settings = tag_data.settings;
+
+    if (settings.crc_counter != NFP::counter_limit) {
+        settings.crc_counter++;
+    }
+
+    // TODO: this reads data from a global, find what it is
+    std::array<u8, 8> unknown_input{};
+    boost::crc_32_type crc;
+    crc.process_bytes(&unknown_input, sizeof(unknown_input));
+    settings.crc = crc.checksum();
+}
+
+void NfcDevice::UpdateRegisterInfoCrc() {
+#pragma pack(push, 1)
+    struct CrcData {
+        Mii::Ver3StoreData mii;
+        u8 application_id_byte;
+        u8 unknown;
+        Mii::NfpStoreDataExtension mii_extension;
+        std::array<u32, 0x5> unknown2;
+    };
+    static_assert(sizeof(CrcData) == 0x7e, "CrcData is an invalid size");
+#pragma pack(pop)
+
+    const CrcData crc_data{
+        .mii = tag_data.owner_mii,
+        .application_id_byte = tag_data.application_id_byte,
+        .unknown = tag_data.unknown,
+        .mii_extension = tag_data.mii_extension,
+        .unknown2 = tag_data.unknown2,
+    };
+
+    boost::crc_32_type crc;
+    crc.process_bytes(&crc_data, sizeof(CrcData));
+    tag_data.register_info_crc = crc.checksum();
+}
+
+u64 NfcDevice::GetHandle() const {
+    // Generate a handle based of the npad id
+    return static_cast<u64>(npad_id);
+}
+
+DeviceState NfcDevice::GetCurrentState() const {
+    return device_state;
+}
+
+Result NfcDevice::GetNpadId(Core::HID::NpadIdType& out_npad_id) const {
+    out_npad_id = npad_id;
+    return ResultSuccess;
+}
+
+} // namespace Service::NFC
diff --git a/src/core/hle/service/nfc/common/device.h b/src/core/hle/service/nfc/common/device.h
new file mode 100644
index 000000000..654eda98e
--- /dev/null
+++ b/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
diff --git a/src/core/hle/service/nfc/common/device_manager.cpp b/src/core/hle/service/nfc/common/device_manager.cpp
new file mode 100644
index 000000000..d5deaaf27
--- /dev/null
+++ b/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
diff --git a/src/core/hle/service/nfc/common/device_manager.h b/src/core/hle/service/nfc/common/device_manager.h
new file mode 100644
index 000000000..2971e280f
--- /dev/null
+++ b/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