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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <memory>
#include <span>
#include <type_traits>
#include "common/common_types.h"
#include "core/file_sys/vfs.h"
namespace Core::Crypto {
struct CipherContext;
enum class Mode {
CTR = 11,
ECB = 2,
XTS = 70,
};
enum class Op {
Encrypt,
Decrypt,
};
template <typename Key, std::size_t KeySize = sizeof(Key)>
class AESCipher {
static_assert(std::is_same_v<Key, std::array<u8, KeySize>>, "Key must be std::array of u8.");
static_assert(KeySize == 0x10 || KeySize == 0x20, "KeySize must be 128 or 256.");
public:
AESCipher(Key key, Mode mode);
~AESCipher();
void SetIV(std::span<const u8> data);
template <typename Source, typename Dest>
void Transcode(const Source* src, std::size_t size, Dest* dest, Op op) const {
static_assert(std::is_trivially_copyable_v<Source> && std::is_trivially_copyable_v<Dest>,
"Transcode source and destination types must be trivially copyable.");
Transcode(reinterpret_cast<const u8*>(src), size, reinterpret_cast<u8*>(dest), op);
}
void Transcode(const u8* src, std::size_t size, u8* dest, Op op) const;
template <typename Source, typename Dest>
void XTSTranscode(const Source* src, std::size_t size, Dest* dest, std::size_t sector_id,
std::size_t sector_size, Op op) {
static_assert(std::is_trivially_copyable_v<Source> && std::is_trivially_copyable_v<Dest>,
"XTSTranscode source and destination types must be trivially copyable.");
XTSTranscode(reinterpret_cast<const u8*>(src), size, reinterpret_cast<u8*>(dest), sector_id,
sector_size, op);
}
void XTSTranscode(const u8* src, std::size_t size, u8* dest, std::size_t sector_id,
std::size_t sector_size, Op op);
private:
std::unique_ptr<CipherContext> ctx;
};
} // namespace Core::Crypto
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