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key_manager: Add support for KEK and SD seed derivation

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This commit is contained in:
Zach Hilman 2018-08-16 17:12:05 -04:00
parent cde665c565
commit f26fc64cb4
2 changed files with 135 additions and 5 deletions
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26
src/core/crypto/key_manager.h
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@ -23,9 +23,8 @@ static_assert(sizeof(Key128) == 16, "Key128 must be 128 bytes big.");
static_assert(sizeof(Key256) == 32, "Key128 must be 128 bytes big.");
enum class S256KeyType : u64 {
Header, //
SDSave, //
SDNCA, //
Header, //
SDKeySource, // f1=SDKeyType
};
enum class S128KeyType : u64 {
@ -37,6 +36,7 @@ enum class S128KeyType : u64 {
KeyArea, // f1=crypto revision f2=type {app, ocean, system}
SDSeed, //
Titlekey, // f1=rights id LSB f2=rights id MSB
Source, // f1=source type, f2= sub id
};
enum class KeyAreaKeyType : u8 {
@ -45,6 +45,17 @@ enum class KeyAreaKeyType : u8 {
System,
};
enum class SourceKeyType : u8 {
SDKEK,
AESKEKGeneration,
AESKeyGeneration,
};
enum class SDKeyType : u8 {
Save,
NCA,
};
template <typename KeyType>
struct KeyIndex {
KeyType type;
@ -83,6 +94,10 @@ public:
static bool KeyFileExists(bool title);
// Call before using the sd seed to attempt to derive it if it dosen't exist. Needs system save
// 8*43 and the private file to exist.
void DeriveSDSeedLazy();
private:
boost::container::flat_map<KeyIndex<S128KeyType>, Key128> s128_keys;
boost::container::flat_map<KeyIndex<S256KeyType>, Key256> s256_keys;
@ -95,4 +110,9 @@ private:
static const boost::container::flat_map<std::string, KeyIndex<S128KeyType>> s128_file_id;
static const boost::container::flat_map<std::string, KeyIndex<S256KeyType>> s256_file_id;
};
Key128 GenerateKeyEncryptionKey(Key128 source, Key128 master, Key128 kek_seed, Key128 key_seed);
boost::optional<Key128> DeriveSDSeed();
Loader::ResultStatus DeriveSDKeys(std::array<Key256, 2>& sd_keys, const KeyManager& keys);
} // namespace Core::Crypto