nfp: Multiple fixes against HW

9 files changed, 163 insertions, 62 deletions

diff --git a/src/core/hle/service/mii/mii_manager.cpp b/src/core/hle/service/mii/mii_manager.cpp
index 3e92152ec..4bc8703e1 100644
--- a/src/core/hle/service/mii/mii_manager.cpp
+++ b/src/core/hle/service/mii/mii_manager.cpp
@@ -431,8 +431,7 @@ CharInfo MiiManager::ConvertV3ToCharInfo(const Ver3StoreData& mii_v3) const {
     Service::Mii::MiiManager manager;
     auto mii = manager.BuildDefault(0);
 
-    // Check if mii data exist
-    if (mii_v3.version == 0) {
+    if (!ValidateV3Info(mii_v3)) {
         return mii;
     }
 
@@ -576,6 +575,71 @@ Ver3StoreData MiiManager::ConvertCharInfoToV3(const CharInfo& mii) const {
     return mii_v3;
 }
 
+bool MiiManager::ValidateV3Info(const Ver3StoreData& mii_v3) const {
+    bool is_valid = mii_v3.version == 0 || mii_v3.version == 3;
+
+    is_valid = is_valid && (mii_v3.mii_name[0] != 0);
+
+    is_valid = is_valid && (mii_v3.mii_information.birth_month < 13);
+    is_valid = is_valid && (mii_v3.mii_information.birth_day < 32);
+    is_valid = is_valid && (mii_v3.mii_information.favorite_color < 12);
+    is_valid = is_valid && (mii_v3.height < 128);
+    is_valid = is_valid && (mii_v3.build < 128);
+
+    is_valid = is_valid && (mii_v3.appearance_bits1.face_shape < 12);
+    is_valid = is_valid && (mii_v3.appearance_bits1.skin_color < 7);
+    is_valid = is_valid && (mii_v3.appearance_bits2.wrinkles < 12);
+    is_valid = is_valid && (mii_v3.appearance_bits2.makeup < 12);
+
+    is_valid = is_valid && (mii_v3.hair_style < 132);
+    is_valid = is_valid && (mii_v3.appearance_bits3.hair_color < 8);
+
+    is_valid = is_valid && (mii_v3.appearance_bits4.eye_type < 60);
+    is_valid = is_valid && (mii_v3.appearance_bits4.eye_color < 6);
+    is_valid = is_valid && (mii_v3.appearance_bits4.eye_scale < 8);
+    is_valid = is_valid && (mii_v3.appearance_bits4.eye_vertical_stretch < 7);
+    is_valid = is_valid && (mii_v3.appearance_bits4.eye_rotation < 8);
+    is_valid = is_valid && (mii_v3.appearance_bits4.eye_spacing < 13);
+    is_valid = is_valid && (mii_v3.appearance_bits4.eye_y_position < 19);
+
+    is_valid = is_valid && (mii_v3.appearance_bits5.eyebrow_style < 25);
+    is_valid = is_valid && (mii_v3.appearance_bits5.eyebrow_color < 8);
+    is_valid = is_valid && (mii_v3.appearance_bits5.eyebrow_scale < 9);
+    is_valid = is_valid && (mii_v3.appearance_bits5.eyebrow_yscale < 7);
+    is_valid = is_valid && (mii_v3.appearance_bits5.eyebrow_rotation < 12);
+    is_valid = is_valid && (mii_v3.appearance_bits5.eyebrow_spacing < 12);
+    is_valid = is_valid && (mii_v3.appearance_bits5.eyebrow_y_position < 19);
+
+    is_valid = is_valid && (mii_v3.appearance_bits6.nose_type < 18);
+    is_valid = is_valid && (mii_v3.appearance_bits6.nose_scale < 9);
+    is_valid = is_valid && (mii_v3.appearance_bits6.nose_y_position < 19);
+
+    is_valid = is_valid && (mii_v3.appearance_bits7.mouth_type < 36);
+    is_valid = is_valid && (mii_v3.appearance_bits7.mouth_color < 5);
+    is_valid = is_valid && (mii_v3.appearance_bits7.mouth_scale < 9);
+    is_valid = is_valid && (mii_v3.appearance_bits7.mouth_horizontal_stretch < 7);
+    is_valid = is_valid && (mii_v3.appearance_bits8.mouth_y_position < 19);
+
+    is_valid = is_valid && (mii_v3.appearance_bits8.mustache_type < 6);
+    is_valid = is_valid && (mii_v3.appearance_bits9.mustache_scale < 7);
+    is_valid = is_valid && (mii_v3.appearance_bits9.mustache_y_position < 17);
+
+    is_valid = is_valid && (mii_v3.appearance_bits9.bear_type < 6);
+    is_valid = is_valid && (mii_v3.appearance_bits9.facial_hair_color < 8);
+
+    is_valid = is_valid && (mii_v3.appearance_bits10.glasses_type < 9);
+    is_valid = is_valid && (mii_v3.appearance_bits10.glasses_color < 6);
+    is_valid = is_valid && (mii_v3.appearance_bits10.glasses_scale < 8);
+    is_valid = is_valid && (mii_v3.appearance_bits10.glasses_y_position < 21);
+
+    is_valid = is_valid && (mii_v3.appearance_bits11.mole_enabled < 2);
+    is_valid = is_valid && (mii_v3.appearance_bits11.mole_scale < 9);
+    is_valid = is_valid && (mii_v3.appearance_bits11.mole_x_position < 17);
+    is_valid = is_valid && (mii_v3.appearance_bits11.mole_y_position < 31);
+
+    return is_valid;
+}
+
 ResultVal<std::vector<MiiInfoElement>> MiiManager::GetDefault(SourceFlag source_flag) {
     std::vector<MiiInfoElement> result;
 
diff --git a/src/core/hle/service/mii/mii_manager.h b/src/core/hle/service/mii/mii_manager.h
index b68fdd54c..83ad3d343 100644
--- a/src/core/hle/service/mii/mii_manager.h
+++ b/src/core/hle/service/mii/mii_manager.h
@@ -24,6 +24,7 @@ public:
     CharInfo BuildDefault(std::size_t index);
     CharInfo ConvertV3ToCharInfo(const Ver3StoreData& mii_v3) const;
     Ver3StoreData ConvertCharInfoToV3(const CharInfo& mii) const;
+    bool ValidateV3Info(const Ver3StoreData& mii_v3) const;
     ResultVal<std::vector<MiiInfoElement>> GetDefault(SourceFlag source_flag);
     Result GetIndex(const CharInfo& info, u32& index);
 
diff --git a/src/core/hle/service/nfc/nfc.cpp b/src/core/hle/service/nfc/nfc.cpp
index 13a843a28..046c5f18f 100644
--- a/src/core/hle/service/nfc/nfc.cpp
+++ b/src/core/hle/service/nfc/nfc.cpp
@@ -106,10 +106,10 @@ public:
             {1, &IUser::FinalizeOld, "FinalizeOld"},
             {2, &IUser::GetStateOld, "GetStateOld"},
             {3, &IUser::IsNfcEnabledOld, "IsNfcEnabledOld"},
-            {400, nullptr, "Initialize"},
-            {401, nullptr, "Finalize"},
-            {402, nullptr, "GetState"},
-            {403, nullptr, "IsNfcEnabled"},
+            {400, &IUser::InitializeOld, "Initialize"},
+            {401, &IUser::FinalizeOld, "Finalize"},
+            {402, &IUser::GetStateOld, "GetState"},
+            {403, &IUser::IsNfcEnabledOld, "IsNfcEnabled"},
             {404, nullptr, "ListDevices"},
             {405, nullptr, "GetDeviceState"},
             {406, nullptr, "GetNpadId"},
diff --git a/src/core/hle/service/nfp/amiibo_crypto.cpp b/src/core/hle/service/nfp/amiibo_crypto.cpp
index c87da5ae4..9e06970a4 100644
--- a/src/core/hle/service/nfp/amiibo_crypto.cpp
+++ b/src/core/hle/service/nfp/amiibo_crypto.cpp
@@ -25,7 +25,8 @@ bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
     LOG_DEBUG(Service_NFP, "character_id=0x{0:x}", amiibo_data.model_info.character_id);
     LOG_DEBUG(Service_NFP, "character_variant={}", amiibo_data.model_info.character_variant);
     LOG_DEBUG(Service_NFP, "amiibo_type={}", amiibo_data.model_info.amiibo_type);
-    LOG_DEBUG(Service_NFP, "model_number=0x{0:x}", amiibo_data.model_info.model_number);
+    LOG_DEBUG(Service_NFP, "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, "fixed_value=0x{0:x}", amiibo_data.model_info.constant_value);
 
@@ -35,11 +36,12 @@ bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
 
     // Validate UUID
     constexpr u8 CT = 0x88; // As defined in `ISO / IEC 14443 - 3`
-    if ((CT ^ ntag_file.uuid[0] ^ ntag_file.uuid[1] ^ ntag_file.uuid[2]) != ntag_file.uuid[3]) {
+    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[4] ^ ntag_file.uuid[5] ^ ntag_file.uuid[6] ^ ntag_file.uuid[7]) !=
-        ntag_file.uuid[8]) {
+    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;
     }
 
@@ -70,7 +72,8 @@ bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
 NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data) {
     NTAG215File encoded_data{};
 
-    memcpy(encoded_data.uuid2.data(), nfc_data.uuid.data() + 0x8, sizeof(encoded_data.uuid2));
+    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;
@@ -85,7 +88,7 @@ NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data) {
     encoded_data.hash = nfc_data.user_memory.hash;
     encoded_data.application_area = nfc_data.user_memory.application_area;
     encoded_data.hmac_tag = nfc_data.user_memory.hmac_tag;
-    memcpy(encoded_data.uuid.data(), nfc_data.uuid.data(), sizeof(encoded_data.uuid));
+    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;
@@ -99,8 +102,9 @@ NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data) {
 EncryptedNTAG215File EncodedDataToNfcData(const NTAG215File& encoded_data) {
     EncryptedNTAG215File nfc_data{};
 
-    memcpy(nfc_data.uuid.data() + 0x8, encoded_data.uuid2.data(), sizeof(encoded_data.uuid2));
-    memcpy(nfc_data.uuid.data(), encoded_data.uuid.data(), sizeof(encoded_data.uuid));
+    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;
@@ -127,10 +131,10 @@ EncryptedNTAG215File EncodedDataToNfcData(const NTAG215File& encoded_data) {
 
 u32 GetTagPassword(const TagUuid& uuid) {
     // Verifiy that the generated password is correct
-    u32 password = 0xAA ^ (uuid[1] ^ uuid[3]);
-    password &= (0x55 ^ (uuid[2] ^ uuid[4])) << 8;
-    password &= (0xAA ^ (uuid[3] ^ uuid[5])) << 16;
-    password &= (0x55 ^ (uuid[4] ^ uuid[6])) << 24;
+    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;
 }
 
@@ -138,15 +142,13 @@ HashSeed GetSeed(const NTAG215File& data) {
     HashSeed seed{
         .magic = data.write_counter,
         .padding = {},
-        .uuid1 = {},
-        .uuid2 = {},
+        .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,
     };
 
-    // Copy the first 8 bytes of uuid
-    memcpy(seed.uuid1.data(), data.uuid.data(), sizeof(seed.uuid1));
-    memcpy(seed.uuid2.data(), data.uuid.data(), sizeof(seed.uuid2));
-
     return seed;
 }
 
@@ -165,8 +167,10 @@ std::vector<u8> GenerateInternalKey(const InternalKey& key, const HashSeed& seed
     output.insert(output.end(), key.magic_bytes.begin(),
                   key.magic_bytes.begin() + key.magic_length);
 
-    output.insert(output.end(), seed.uuid1.begin(), seed.uuid1.end());
-    output.insert(output.end(), seed.uuid2.begin(), seed.uuid2.end());
+    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]));
@@ -250,14 +254,15 @@ void Cipher(const DerivedKeys& keys, const NTAG215File& in_data, NTAG215File& ou
                           reinterpret_cast<unsigned char*>(&out_data.settings));
 
     // Copy the rest of the data directly
-    out_data.uuid2 = in_data.uuid2;
+    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.uuid = in_data.uuid;
     out_data.model_info = in_data.model_info;
     out_data.keygen_salt = in_data.keygen_salt;
     out_data.dynamic_lock = in_data.dynamic_lock;
@@ -309,7 +314,7 @@ bool DecodeAmiibo(const EncryptedNTAG215File& encrypted_tag_data, NTAG215File& t
     // 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.uuid),
+                    sizeof(HmacKey), reinterpret_cast<const unsigned char*>(&tag_data.uid),
                     input_length, reinterpret_cast<unsigned char*>(&tag_data.hmac_tag));
 
     // Regenerate data HMAC
@@ -350,7 +355,7 @@ bool EncodeAmiibo(const NTAG215File& tag_data, EncryptedNTAG215File& encrypted_t
     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.uuid),
+                    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
@@ -364,7 +369,7 @@ bool EncodeAmiibo(const NTAG215File& tag_data, EncryptedNTAG215File& encrypted_t
                            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.uuid),
+    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));
 
diff --git a/src/core/hle/service/nfp/amiibo_crypto.h b/src/core/hle/service/nfp/amiibo_crypto.h
index e3fa3d07e..0175ced91 100644
--- a/src/core/hle/service/nfp/amiibo_crypto.h
+++ b/src/core/hle/service/nfp/amiibo_crypto.h
@@ -24,8 +24,10 @@ using DrgbOutput = std::array<u8, 0x20>;
 struct HashSeed {
     u16_be magic;
     std::array<u8, 0xE> padding;
-    std::array<u8, 0x8> uuid1;
-    std::array<u8, 0x8> uuid2;
+    UniqueSerialNumber uid_1;
+    u8 nintendo_id_1;
+    UniqueSerialNumber uid_2;
+    u8 nintendo_id_2;
     std::array<u8, 0x20> keygen_salt;
 };
 static_assert(sizeof(HashSeed) == 0x40, "HashSeed is an invalid size");
diff --git a/src/core/hle/service/nfp/nfp_device.cpp b/src/core/hle/service/nfp/nfp_device.cpp
index ce3bcccf4..f0eaa7df2 100644
--- a/src/core/hle/service/nfp/nfp_device.cpp
+++ b/src/core/hle/service/nfp/nfp_device.cpp
@@ -22,6 +22,9 @@
 #include "core/hle/service/nfp/nfp_device.h"
 #include "core/hle/service/nfp/nfp_result.h"
 #include "core/hle/service/nfp/nfp_user.h"
+#include "core/hle/service/time/time_manager.h"
+#include "core/hle/service/time/time_zone_content_manager.h"
+#include "core/hle/service/time/time_zone_types.h"
 
 namespace Service::NFP {
 NfpDevice::NfpDevice(Core::HID::NpadIdType npad_id_, Core::System& system_,
@@ -39,6 +42,9 @@ NfpDevice::NfpDevice(Core::HID::NpadIdType npad_id_, Core::System& system_,
     };
     is_controller_set = true;
     callback_key = npad_device->SetCallback(engine_callback);
+
+    auto& standard_steady_clock{system.GetTimeManager().GetStandardSteadyClockCore()};
+    current_posix_time = standard_steady_clock.GetCurrentTimePoint(system).time_point;
 }
 
 NfpDevice::~NfpDevice() {
@@ -98,6 +104,7 @@ bool NfpDevice::LoadAmiibo(const std::vector<u8>& data) {
     }
 
     device_state = DeviceState::TagFound;
+    deactivate_event->GetReadableEvent().Clear();
     activate_event->GetWritableEvent().Signal();
     return true;
 }
@@ -112,6 +119,7 @@ void NfpDevice::CloseAmiibo() {
     device_state = DeviceState::TagRemoved;
     encrypted_tag_data = {};
     tag_data = {};
+    activate_event->GetReadableEvent().Clear();
     deactivate_event->GetWritableEvent().Signal();
 }
 
@@ -140,8 +148,6 @@ void NfpDevice::Finalize() {
 }
 
 Result NfpDevice::StartDetection(s32 protocol_) {
-    // TODO(german77): Add callback for when nfc data is available
-
     if (device_state == DeviceState::Initialized || device_state == DeviceState::TagRemoved) {
         npad_device->SetPollingMode(Common::Input::PollingMode::NFC);
         device_state = DeviceState::SearchingForTag;
@@ -172,11 +178,9 @@ Result NfpDevice::StopDetection() {
 Result NfpDevice::Flush() {
     auto& settings = tag_data.settings;
 
-    if (settings.write_date.raw_date != settings.write_date.raw_date) {
-        // TODO: Read current system date
-        settings.write_date.SetYear(2022);
-        settings.write_date.SetMonth(9);
-        settings.write_date.SetDay(9);
+    const auto& current_date = GetAmiiboDate(current_posix_time);
+    if (settings.write_date.raw_date != current_date.raw_date) {
+        settings.write_date = current_date;
         settings.crc_counter++;
         // TODO: Find how to calculate the crc check
         // settings.crc = CalculateCRC(settings);
@@ -239,10 +243,10 @@ Result NfpDevice::GetTagInfo(TagInfo& tag_info) const {
     }
 
     tag_info = {
-        .uuid = encrypted_tag_data.uuid,
-        .uuid_length = static_cast<u8>(encrypted_tag_data.uuid.size()),
-        .protocol = protocol,
-        .tag_type = static_cast<u32>(encrypted_tag_data.user_memory.model_info.amiibo_type),
+        .uuid = encrypted_tag_data.uuid.uid,
+        .uuid_length = static_cast<u8>(encrypted_tag_data.uuid.uid.size()),
+        .protocol = 1,
+        .tag_type = 2,
     };
 
     return ResultSuccess;
@@ -255,8 +259,6 @@ Result NfpDevice::GetCommonInfo(CommonInfo& common_info) const {
     }
 
     const auto& settings = tag_data.settings;
-    const u32 application_area_size =
-        tag_data.settings.settings.appdata_initialized == 0 ? 0 : sizeof(ApplicationArea);
 
     // TODO: Validate this data
     common_info = {
@@ -267,8 +269,8 @@ Result NfpDevice::GetCommonInfo(CommonInfo& common_info) const {
                 settings.write_date.GetDay(),
             },
         .write_counter = tag_data.write_counter,
-        .version = 1,
-        .application_area_size = application_area_size,
+        .version = 0,
+        .application_area_size = sizeof(ApplicationArea),
     };
     return ResultSuccess;
 }
@@ -334,13 +336,8 @@ Result NfpDevice::SetNicknameAndOwner(const AmiiboName& amiibo_name) {
     Service::Mii::MiiManager manager;
     auto& settings = tag_data.settings;
 
-    // TODO: Read current system date
-    settings.init_date.SetYear(2022);
-    settings.init_date.SetMonth(9);
-    settings.init_date.SetDay(9);
-    settings.write_date.SetYear(2022);
-    settings.write_date.SetMonth(9);
-    settings.write_date.SetDay(9);
+    settings.init_date = GetAmiiboDate(current_posix_time);
+    settings.write_date = GetAmiiboDate(current_posix_time);
     settings.crc_counter++;
     // TODO: Find how to calculate the crc check
     // settings.crc = CalculateCRC(settings);
@@ -570,4 +567,23 @@ void NfpDevice::SetAmiiboName(AmiiboSettings& settings, const AmiiboName& amiibo
     }
 }
 
+AmiiboDate NfpDevice::GetAmiiboDate(s64 posix_time) const {
+    const auto& time_zone_manager =
+        system.GetTimeManager().GetTimeZoneContentManager().GetTimeZoneManager();
+    Time::TimeZone::CalendarInfo calendar_info{};
+    AmiiboDate amiibo_date{};
+
+    amiibo_date.SetYear(2000);
+    amiibo_date.SetMonth(1);
+    amiibo_date.SetDay(1);
+
+    if (time_zone_manager.ToCalendarTime({}, posix_time, calendar_info) == ResultSuccess) {
+        amiibo_date.SetYear(calendar_info.time.year);
+        amiibo_date.SetMonth(calendar_info.time.month);
+        amiibo_date.SetDay(calendar_info.time.day);
+    }
+
+    return amiibo_date;
+}
+
 } // namespace Service::NFP
diff --git a/src/core/hle/service/nfp/nfp_device.h b/src/core/hle/service/nfp/nfp_device.h
index 9ceb7b8fd..c020506a6 100644
--- a/src/core/hle/service/nfp/nfp_device.h
+++ b/src/core/hle/service/nfp/nfp_device.h
@@ -75,6 +75,7 @@ private:
 
     AmiiboName GetAmiiboName(const AmiiboSettings& settings) const;
     void SetAmiiboName(AmiiboSettings& settings, const AmiiboName& amiibo_name);
+    AmiiboDate GetAmiiboDate(s64 posix_time) const;
 
     bool is_controller_set{};
     int callback_key;
@@ -88,6 +89,7 @@ private:
 
     bool is_data_moddified{};
     s32 protocol{};
+    s64 current_posix_time{};
     DeviceState device_state{DeviceState::Unavailable};
 
     NTAG215File tag_data{};
diff --git a/src/core/hle/service/nfp/nfp_result.h b/src/core/hle/service/nfp/nfp_result.h
index 15bc02b15..ac259e2ff 100644
--- a/src/core/hle/service/nfp/nfp_result.h
+++ b/src/core/hle/service/nfp/nfp_result.h
@@ -17,5 +17,6 @@ constexpr Result ApplicationAreaIsNotInitialized(ErrorModule::NFP, 128);
 constexpr Result CorruptedData(ErrorModule::NFP, 144);
 constexpr Result WrongApplicationAreaId(ErrorModule::NFP, 152);
 constexpr Result ApplicationAreaExist(ErrorModule::NFP, 168);
+constexpr Result NotAnAmiibo(ErrorModule::NFP, 178);
 
 } // namespace Service::NFP
diff --git a/src/core/hle/service/nfp/nfp_types.h b/src/core/hle/service/nfp/nfp_types.h
index 2685ae8fe..448791846 100644
--- a/src/core/hle/service/nfp/nfp_types.h
+++ b/src/core/hle/service/nfp/nfp_types.h
@@ -75,11 +75,19 @@ enum class AmiiboSeries : u8 {
     Diablo,
 };
 
-using TagUuid = std::array<u8, 10>;
+using UniqueSerialNumber = std::array<u8, 7>;
+using LockBytes = std::array<u8, 2>;
 using HashData = std::array<u8, 0x20>;
 using ApplicationArea = std::array<u8, 0xD8>;
 using AmiiboName = std::array<char, (amiibo_name_length * 4) + 1>;
 
+struct TagUuid {
+    UniqueSerialNumber uid;
+    u8 nintendo_id;
+    LockBytes lock_bytes;
+};
+static_assert(sizeof(TagUuid) == 10, "TagUuid is an invalid size");
+
 struct AmiiboDate {
     u16 raw_date{};
 
@@ -91,7 +99,7 @@ struct AmiiboDate {
         return static_cast<u16>(((GetValue() & 0xFE00) >> 9) + 2000);
     }
     u8 GetMonth() const {
-        return static_cast<u8>(((GetValue() & 0x01E0) >> 5) - 1);
+        return static_cast<u8>((GetValue() & 0x01E0) >> 5);
     }
     u8 GetDay() const {
         return static_cast<u8>(GetValue() & 0x001F);
@@ -102,7 +110,7 @@ struct AmiiboDate {
         raw_date = Common::swap16((GetValue() & ~0xFE00) | year_converted);
     }
     void SetMonth(u8 month) {
-        const u16 month_converted = static_cast<u16>((month + 1) << 5);
+        const u16 month_converted = static_cast<u16>(month << 5);
         raw_date = Common::swap16((GetValue() & ~0x01E0) | month_converted);
     }
     void SetDay(u8 day) {
@@ -137,7 +145,7 @@ struct AmiiboModelInfo {
     u16 character_id;
     u8 character_variant;
     AmiiboType amiibo_type;
-    u16 model_number;
+    u16_be model_number;
     AmiiboSeries series;
     u8 constant_value;         // Must be 02
     INSERT_PADDING_BYTES(0x4); // Unknown
@@ -172,7 +180,7 @@ struct EncryptedAmiiboFile {
 static_assert(sizeof(EncryptedAmiiboFile) == 0x1F8, "AmiiboFile is an invalid size");
 
 struct NTAG215File {
-    std::array<u8, 0x2> uuid2;
+    LockBytes lock_bytes;      // Tag UUID
     u16 static_lock;           // Set defined pages as read only
     u32 compability_container; // Defines available memory
     HashData hmac_data;        // Hash
@@ -188,7 +196,8 @@ struct NTAG215File {
     HashData hash;                    // Probably a SHA256-HMAC hash?
     ApplicationArea application_area; // Encrypted Game data
     HashData hmac_tag;                // Hash
-    std::array<u8, 0x8> uuid;
+    UniqueSerialNumber uid;           // Unique serial number
+    u8 nintendo_id;                   // Tag UUID
     AmiiboModelInfo model_info;
     HashData keygen_salt;     // Salt
     u32 dynamic_lock;         // Dynamic lock
@@ -215,7 +224,8 @@ static_assert(std::is_trivially_copyable_v<EncryptedNTAG215File>,
               "EncryptedNTAG215File must be trivially copyable.");
 
 struct TagInfo {
-    TagUuid uuid;
+    UniqueSerialNumber uuid;
+    INSERT_PADDING_BYTES(0x3);
     u8 uuid_length;
     INSERT_PADDING_BYTES(0x15);
     s32 protocol;