mirror of
https://github.com/yuzu-emu/yuzu.git
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226 lines
7 KiB
C++
226 lines
7 KiB
C++
// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <map>
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#include <optional>
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#include <string>
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#include <boost/container/flat_map.hpp>
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#include <fmt/format.h>
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#include "common/common_types.h"
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#include "core/crypto/partition_data_manager.h"
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#include "core/file_sys/vfs_types.h"
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namespace FileUtil {
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class IOFile;
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}
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namespace Loader {
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enum class ResultStatus : u16;
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}
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namespace Core::Crypto {
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constexpr u64 TICKET_FILE_TITLEKEY_OFFSET = 0x180;
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using Key128 = std::array<u8, 0x10>;
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using Key256 = std::array<u8, 0x20>;
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using SHA256Hash = std::array<u8, 0x20>;
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using TicketRaw = std::array<u8, 0x400>;
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static_assert(sizeof(Key128) == 16, "Key128 must be 128 bytes big.");
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static_assert(sizeof(Key256) == 32, "Key256 must be 256 bytes big.");
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template <size_t bit_size, size_t byte_size = (bit_size >> 3)>
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struct RSAKeyPair {
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std::array<u8, byte_size> encryption_key;
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std::array<u8, byte_size> decryption_key;
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std::array<u8, byte_size> modulus;
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std::array<u8, 4> exponent;
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};
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template <size_t bit_size, size_t byte_size>
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bool operator==(const RSAKeyPair<bit_size, byte_size>& lhs,
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const RSAKeyPair<bit_size, byte_size>& rhs) {
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return std::tie(lhs.encryption_key, lhs.decryption_key, lhs.modulus, lhs.exponent) ==
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std::tie(rhs.encryption_key, rhs.decryption_key, rhs.modulus, rhs.exponent);
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}
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enum class KeyCategory : u8 {
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Standard,
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Title,
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Console,
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};
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enum class S256KeyType : u64 {
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SDKey, // f1=SDKeyType
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Header, //
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SDKeySource, // f1=SDKeyType
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HeaderSource, //
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};
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enum class S128KeyType : u64 {
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Master, // f1=crypto revision
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Package1, // f1=crypto revision
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Package2, // f1=crypto revision
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Titlekek, // f1=crypto revision
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ETicketRSAKek, //
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KeyArea, // f1=crypto revision f2=type {app, ocean, system}
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SDSeed, //
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Titlekey, // f1=rights id LSB f2=rights id MSB
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Source, // f1=source type, f2= sub id
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Keyblob, // f1=crypto revision
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KeyblobMAC, // f1=crypto revision
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TSEC, //
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SecureBoot, //
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BIS, // f1=partition (0-3), f2=type {crypt, tweak}
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HeaderKek, //
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SDKek, //
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RSAKek, //
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};
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enum class KeyAreaKeyType : u8 {
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Application,
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Ocean,
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System,
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};
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enum class SourceKeyType : u8 {
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SDKek, //
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AESKekGeneration, //
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AESKeyGeneration, //
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RSAOaepKekGeneration, //
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Master, //
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Keyblob, // f2=crypto revision
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KeyAreaKey, // f2=KeyAreaKeyType
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Titlekek, //
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Package2, //
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HeaderKek, //
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KeyblobMAC, //
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ETicketKek, //
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ETicketKekek, //
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};
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enum class SDKeyType : u8 {
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Save,
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NCA,
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};
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enum class BISKeyType : u8 {
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Crypto,
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Tweak,
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};
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enum class RSAKekType : u8 {
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Mask0,
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Seed3,
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};
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template <typename KeyType>
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struct KeyIndex {
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KeyType type;
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u64 field1;
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u64 field2;
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std::string DebugInfo() const {
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u8 key_size = 16;
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if constexpr (std::is_same_v<KeyType, S256KeyType>)
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key_size = 32;
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return fmt::format("key_size={:02X}, key={:02X}, field1={:016X}, field2={:016X}", key_size,
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static_cast<u8>(type), field1, field2);
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}
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};
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// boost flat_map requires operator< for O(log(n)) lookups.
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template <typename KeyType>
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bool operator<(const KeyIndex<KeyType>& lhs, const KeyIndex<KeyType>& rhs) {
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return std::tie(lhs.type, lhs.field1, lhs.field2) < std::tie(rhs.type, rhs.field1, rhs.field2);
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}
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class KeyManager {
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public:
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KeyManager();
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bool HasKey(S128KeyType id, u64 field1 = 0, u64 field2 = 0) const;
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bool HasKey(S256KeyType id, u64 field1 = 0, u64 field2 = 0) const;
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Key128 GetKey(S128KeyType id, u64 field1 = 0, u64 field2 = 0) const;
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Key256 GetKey(S256KeyType id, u64 field1 = 0, u64 field2 = 0) const;
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Key256 GetBISKey(u8 partition_id) const;
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void SetKey(S128KeyType id, Key128 key, u64 field1 = 0, u64 field2 = 0);
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void SetKey(S256KeyType id, Key256 key, u64 field1 = 0, u64 field2 = 0);
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static bool KeyFileExists(bool title);
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// Call before using the sd seed to attempt to derive it if it dosen't exist. Needs system save
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// 8*43 and the private file to exist.
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void DeriveSDSeedLazy();
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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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void AttemptLoadKeyFile(const std::string& dir1, const std::string& dir2,
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const std::string& filename, bool title);
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template <size_t Size>
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void WriteKeyToFile(KeyCategory category, std::string_view keyname,
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const std::array<u8, Size>& key);
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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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static const boost::container::flat_map<std::string, KeyIndex<S128KeyType>> s128_file_id;
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static const boost::container::flat_map<std::string, KeyIndex<S256KeyType>> s256_file_id;
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};
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Key128 GenerateKeyEncryptionKey(Key128 source, Key128 master, Key128 kek_seed, Key128 key_seed);
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Key128 DeriveKeyblobKey(const Key128& sbk, const Key128& tsec, Key128 source);
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Key128 DeriveKeyblobMACKey(const Key128& keyblob_key, const Key128& mac_source);
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Key128 DeriveMasterKey(const std::array<u8, 0x90>& keyblob, const Key128& master_source);
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std::array<u8, 0x90> DecryptKeyblob(const std::array<u8, 0xB0>& encrypted_keyblob,
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const Key128& key);
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std::optional<Key128> DeriveSDSeed();
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Loader::ResultStatus DeriveSDKeys(std::array<Key256, 2>& sd_keys, KeyManager& keys);
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std::vector<TicketRaw> GetTicketblob(const FileUtil::IOFile& ticket_save);
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// Returns a pair of {rights_id, titlekey}. Fails if the ticket has no certificate authority (offset
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// 0x140-0x144 is zero)
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std::optional<std::pair<Key128, Key128>> ParseTicket(const TicketRaw& ticket,
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const RSAKeyPair<2048>& eticket_extended_key);
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} // namespace Core::Crypto
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