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Diffstat (limited to 'src/core/hle/service/nfp/amiibo_crypto.cpp')
-rw-r--r--src/core/hle/service/nfp/amiibo_crypto.cpp77
1 files changed, 41 insertions, 36 deletions
diff --git a/src/core/hle/service/nfp/amiibo_crypto.cpp b/src/core/hle/service/nfp/amiibo_crypto.cpp
index 31dd3a307..ce0bc3f75 100644
--- a/src/core/hle/service/nfp/amiibo_crypto.cpp
+++ b/src/core/hle/service/nfp/amiibo_crypto.cpp
@@ -20,13 +20,14 @@ bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
const auto& amiibo_data = ntag_file.user_memory;
LOG_DEBUG(Service_NFP, "uuid_lock=0x{0:x}", ntag_file.static_lock);
LOG_DEBUG(Service_NFP, "compability_container=0x{0:x}", ntag_file.compability_container);
- LOG_INFO(Service_NFP, "write_count={}", amiibo_data.write_counter);
-
- LOG_INFO(Service_NFP, "character_id=0x{0:x}", amiibo_data.model_info.character_id);
- LOG_INFO(Service_NFP, "character_variant={}", amiibo_data.model_info.character_variant);
- LOG_INFO(Service_NFP, "amiibo_type={}", amiibo_data.model_info.amiibo_type);
- LOG_INFO(Service_NFP, "model_number=0x{0:x}", amiibo_data.model_info.model_number);
- LOG_INFO(Service_NFP, "series={}", amiibo_data.model_info.series);
+ LOG_DEBUG(Service_NFP, "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, "fixed_value=0x{0:x}", amiibo_data.model_info.constant_value);
LOG_DEBUG(Service_NFP, "tag_dynamic_lock=0x{0:x}", ntag_file.dynamic_lock);
@@ -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;
}
@@ -56,8 +58,9 @@ bool IsAmiiboValid(const EncryptedNTAG215File& ntag_file) {
if (amiibo_data.model_info.constant_value != 0x02) {
return false;
}
- // dynamic_lock value apparently is not constant
- // ntag_file.dynamic_lock == 0x0F0001
+ if ((ntag_file.dynamic_lock & 0xFFFFFF) != 0x0F0001U) {
+ return false;
+ }
if (ntag_file.CFG0 != 0x04000000U) {
return false;
}
@@ -70,7 +73,8 @@ 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;
@@ -82,10 +86,10 @@ NTAG215File NfcDataToEncodedData(const EncryptedNTAG215File& nfc_data) {
encoded_data.applicaton_write_counter = nfc_data.user_memory.applicaton_write_counter;
encoded_data.application_area_id = nfc_data.user_memory.application_area_id;
encoded_data.unknown = nfc_data.user_memory.unknown;
- encoded_data.hash = nfc_data.user_memory.hash;
+ encoded_data.unknown2 = nfc_data.user_memory.unknown2;
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 +103,9 @@ 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;
@@ -112,7 +117,7 @@ EncryptedNTAG215File EncodedDataToNfcData(const NTAG215File& encoded_data) {
nfc_data.user_memory.applicaton_write_counter = encoded_data.applicaton_write_counter;
nfc_data.user_memory.application_area_id = encoded_data.application_area_id;
nfc_data.user_memory.unknown = encoded_data.unknown;
- nfc_data.user_memory.hash = encoded_data.hash;
+ nfc_data.user_memory.unknown2 = encoded_data.unknown2;
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;
@@ -127,10 +132,10 @@ 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 +143,13 @@ 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 +168,10 @@ 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]));
@@ -177,7 +182,6 @@ std::vector<u8> GenerateInternalKey(const InternalKey& key, const HashSeed& seed
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;
@@ -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));
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 07:38:57 +0200