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Merge pull request #9995 from german77/plain

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service: nfp: Add plain amiibo support
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liamwhite 2023-03-27 12:16:24 -04:00 committed by GitHub
commit 3b30f5d823
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5 changed files with 37 additions and 8 deletions
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4
src/core/hle/service/nfp/amiibo_crypto.cpp
View file

@ -70,6 +70,10 @@ bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
return true;
}
bool IsAmiiboValid(const NTAG215File& ntag_file) {
return IsAmiiboValid(EncodedDataToNfcData(ntag_file));
}
NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data) {
NTAG215File encoded_data{};

3
src/core/hle/service/nfp/amiibo_crypto.h
View file

@ -60,6 +60,9 @@ 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);

34
src/core/hle/service/nfp/nfp_device.cpp
View file

@ -121,7 +121,16 @@ bool NfpDevice::LoadAmiibo(std::span<const u8> data) {
// TODO: Filter by allowed_protocols here
memcpy(&encrypted_tag_data, data.data(), sizeof(EncryptedNTAG215File));
memcpy(&tag_data, data.data(), sizeof(EncryptedNTAG215File));
is_plain_amiibo = AmiiboCrypto::IsAmiiboValid(tag_data);
if (is_plain_amiibo) {
encrypted_tag_data = AmiiboCrypto::EncodedDataToNfcData(tag_data);
LOG_INFO(Service_NFP, "Using plain amiibo");
} else {
tag_data = {};
memcpy(&encrypted_tag_data, data.data(), sizeof(EncryptedNTAG215File));
}
device_state = DeviceState::TagFound;
deactivate_event->GetReadableEvent().Clear();
@ -232,13 +241,17 @@ Result NfpDevice::Flush() {
tag_data.write_counter++;
if (!AmiiboCrypto::EncodeAmiibo(tag_data, encrypted_tag_data)) {
LOG_ERROR(Service_NFP, "Failed to encode data");
return WriteAmiiboFailed;
}
std::vector<u8> data(sizeof(EncryptedNTAG215File));
if (is_plain_amiibo) {
memcpy(data.data(), &tag_data, sizeof(tag_data));
} else {
if (!AmiiboCrypto::EncodeAmiibo(tag_data, encrypted_tag_data)) {
LOG_ERROR(Service_NFP, "Failed to encode data");
return WriteAmiiboFailed;
}
std::vector<u8> data(sizeof(encrypted_tag_data));
memcpy(data.data(), &encrypted_tag_data, sizeof(encrypted_tag_data));
memcpy(data.data(), &encrypted_tag_data, sizeof(encrypted_tag_data));
}
if (!npad_device->WriteNfc(data)) {
LOG_ERROR(Service_NFP, "Error writing to file");
@ -256,6 +269,13 @@ Result NfpDevice::Mount(MountTarget mount_target_) {
return WrongDeviceState;
}
// The loaded amiibo is not encrypted
if (is_plain_amiibo) {
device_state = DeviceState::TagMounted;
mount_target = mount_target_;
return ResultSuccess;
}
if (!AmiiboCrypto::IsAmiiboValid(encrypted_tag_data)) {
LOG_ERROR(Service_NFP, "Not an amiibo");
return NotAnAmiibo;

1
src/core/hle/service/nfp/nfp_device.h
View file

@ -95,6 +95,7 @@ private:
bool is_initalized{};
bool is_data_moddified{};
bool is_app_area_open{};
bool is_plain_amiibo{};
TagProtocol allowed_protocols{};
s64 current_posix_time{};
MountTarget mount_target{MountTarget::None};

3
src/core/hle/service/nfp/nfp_types.h
View file

@ -309,7 +309,8 @@ struct EncryptedNTAG215File {
u32 CFG1; // Defines number of verification attempts
NTAG215Password password; // Password data
};
static_assert(sizeof(EncryptedNTAG215File) == 0x21C, "EncryptedNTAG215File is an invalid size");
static_assert(sizeof(EncryptedNTAG215File) == sizeof(NTAG215File),
"EncryptedNTAG215File is an invalid size");
static_assert(std::is_trivially_copyable_v<EncryptedNTAG215File>,
"EncryptedNTAG215File must be trivially copyable.");