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key_manager: Add accessors/helpers for ticket management
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@ -135,6 +135,28 @@ void KeyManager::DeriveGeneralPurposeKeys(std::size_t crypto_revision) {
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}
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}
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RSAKeyPair<2048> KeyManager::GetETicketRSAKey() {
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if (eticket_extended_kek == std::array<u8, 576>{} || !HasKey(S128KeyType::ETicketRSAKek))
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return {};
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const auto eticket_final = GetKey(S128KeyType::ETicketRSAKek);
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std::vector<u8> extended_iv(0x10);
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std::memcpy(extended_iv.data(), eticket_extended_kek.data(), extended_iv.size());
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std::array<u8, 0x230> extended_dec{};
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AESCipher<Key128> rsa_1(eticket_final, Mode::CTR);
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rsa_1.SetIV(extended_iv);
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rsa_1.Transcode(eticket_extended_kek.data() + 0x10, eticket_extended_kek.size() - 0x10,
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extended_dec.data(), Op::Decrypt);
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RSAKeyPair<2048> rsa_key{};
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std::memcpy(rsa_key.decryption_key.data(), extended_dec.data(), rsa_key.decryption_key.size());
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std::memcpy(rsa_key.modulus.data(), extended_dec.data() + 0x100, rsa_key.modulus.size());
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std::memcpy(rsa_key.exponent.data(), extended_dec.data() + 0x200, rsa_key.exponent.size());
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return rsa_key;
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}
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Key128 DeriveKeyblobMACKey(const Key128& keyblob_key, const Key128& mac_source) {
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AESCipher<Key128> mac_cipher(keyblob_key, Mode::ECB);
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Key128 mac_key{};
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@ -450,6 +472,8 @@ void KeyManager::LoadFromFile(const std::string& filename, bool is_title_keys) {
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const auto index = std::stoul(out[0].substr(18, 2), nullptr, 16);
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encrypted_keyblobs[index] = Common::HexStringToArray<0xB0>(out[1]);
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} else if (out[0].compare(0, 20, "eticket_extended_kek") == 0) {
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eticket_extended_kek = Common::HexStringToArray<576>(out[1]);
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} else {
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for (const auto& kv : KEYS_VARIABLE_LENGTH) {
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if (!ValidCryptoRevisionString(out[0], kv.second.size(), 2))
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@ -862,20 +886,19 @@ void KeyManager::DeriveETicket(PartitionDataManager& data) {
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// Titlekeys
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data.DecryptProdInfo(GetBISKey(0));
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const auto eticket_extended_kek = data.GetETicketExtendedKek();
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eticket_extended_kek = data.GetETicketExtendedKek();
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WriteKeyToFile(KeyCategory::Console, "eticket_extended_kek", eticket_extended_kek);
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PopulateTickets();
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}
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std::vector<u8> extended_iv(0x10);
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std::memcpy(extended_iv.data(), eticket_extended_kek.data(), extended_iv.size());
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std::array<u8, 0x230> extended_dec{};
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AESCipher<Key128> rsa_1(eticket_final, Mode::CTR);
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rsa_1.SetIV(extended_iv);
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rsa_1.Transcode(eticket_extended_kek.data() + 0x10, eticket_extended_kek.size() - 0x10,
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extended_dec.data(), Op::Decrypt);
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void KeyManager::PopulateTickets() {
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const auto rsa_key = GetETicketRSAKey();
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RSAKeyPair<2048> rsa_key{};
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std::memcpy(rsa_key.decryption_key.data(), extended_dec.data(), rsa_key.decryption_key.size());
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std::memcpy(rsa_key.modulus.data(), extended_dec.data() + 0x100, rsa_key.modulus.size());
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std::memcpy(rsa_key.exponent.data(), extended_dec.data() + 0x200, rsa_key.exponent.size());
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if (rsa_key == RSAKeyPair<2048>{})
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return;
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if (!common_tickets.empty() && !personal_tickets.empty())
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return;
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const FileUtil::IOFile save1(FileUtil::GetUserPath(FileUtil::UserPath::NANDDir) +
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"/system/save/80000000000000e1",
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@ -886,15 +909,24 @@ void KeyManager::DeriveETicket(PartitionDataManager& data) {
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const auto blob2 = GetTicketblob(save2);
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auto res = GetTicketblob(save1);
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const auto idx = res.size();
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res.insert(res.end(), blob2.begin(), blob2.end());
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for (const auto& raw : res) {
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const auto pair = ParseTicket(raw, rsa_key);
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for (std::size_t i = 0; i < res.size(); ++i) {
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const auto common = i < idx;
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const auto pair = ParseTicket(res[i], rsa_key);
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if (!pair)
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continue;
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const auto& [rid, key] = *pair;
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u128 rights_id;
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std::memcpy(rights_id.data(), rid.data(), rid.size());
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if (common) {
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common_tickets[rights_id] = res[i];
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} else {
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personal_tickets[rights_id] = res[i];
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}
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SetKey(S128KeyType::Titlekey, key, rights_id[1], rights_id[0]);
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}
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}
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@ -997,6 +1029,46 @@ void KeyManager::PopulateFromPartitionData(PartitionDataManager& data) {
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DeriveBase();
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}
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const std::map<u128, TicketRaw>& KeyManager::GetCommonTickets() const {
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return common_tickets;
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}
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const std::map<u128, TicketRaw>& KeyManager::GetPersonalizedTickets() const {
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return personal_tickets;
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}
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bool KeyManager::AddTicketCommon(TicketRaw raw) {
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const auto rsa_key = GetETicketRSAKey();
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if (rsa_key == RSAKeyPair<2048>{})
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return false;
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const auto pair = ParseTicket(raw, rsa_key);
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if (!pair)
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return false;
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const auto& [rid, key] = *pair;
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u128 rights_id;
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std::memcpy(rights_id.data(), rid.data(), rid.size());
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common_tickets[rights_id] = raw;
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SetKey(S128KeyType::Titlekey, key, rights_id[1], rights_id[0]);
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return true;
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}
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bool KeyManager::AddTicketPersonalized(TicketRaw raw) {
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const auto rsa_key = GetETicketRSAKey();
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if (rsa_key == RSAKeyPair<2048>{})
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return false;
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const auto pair = ParseTicket(raw, rsa_key);
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if (!pair)
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return false;
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const auto& [rid, key] = *pair;
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u128 rights_id;
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std::memcpy(rights_id.data(), rid.data(), rid.size());
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common_tickets[rights_id] = raw;
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SetKey(S128KeyType::Titlekey, key, rights_id[1], rights_id[0]);
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return true;
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}
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const boost::container::flat_map<std::string, KeyIndex<S128KeyType>> KeyManager::s128_file_id = {
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{"eticket_rsa_kek", {S128KeyType::ETicketRSAKek, 0, 0}},
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{"eticket_rsa_kek_source",
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@ -165,15 +165,27 @@ public:
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bool BaseDeriveNecessary() const;
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void DeriveBase();
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void DeriveETicket(PartitionDataManager& data);
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void PopulateTickets();
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void PopulateFromPartitionData(PartitionDataManager& data);
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const std::map<u128, TicketRaw>& GetCommonTickets() const;
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const std::map<u128, TicketRaw>& GetPersonalizedTickets() const;
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bool AddTicketCommon(TicketRaw raw);
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bool AddTicketPersonalized(TicketRaw raw);
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private:
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std::map<KeyIndex<S128KeyType>, Key128> s128_keys;
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std::map<KeyIndex<S256KeyType>, Key256> s256_keys;
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// Map from rights ID to ticket
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std::map<u128, TicketRaw> common_tickets;
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std::map<u128, TicketRaw> personal_tickets;
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std::array<std::array<u8, 0xB0>, 0x20> encrypted_keyblobs{};
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std::array<std::array<u8, 0x90>, 0x20> keyblobs{};
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std::array<u8, 576> eticket_extended_kek{};
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bool dev_mode;
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void LoadFromFile(const std::string& filename, bool is_title_keys);
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@ -185,6 +197,8 @@ private:
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void DeriveGeneralPurposeKeys(std::size_t crypto_revision);
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RSAKeyPair<2048> GetETicketRSAKey();
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void SetKeyWrapped(S128KeyType id, Key128 key, u64 field1 = 0, u64 field2 = 0);
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void SetKeyWrapped(S256KeyType id, Key256 key, u64 field1 = 0, u64 field2 = 0);
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