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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <optional>
#include "core/crypto/aes_util.h"
#include "core/crypto/key_manager.h"
#include "core/file_sys/errors.h"
#include "core/file_sys/fssystem/fs_i_storage.h"
#include "core/file_sys/vfs.h"
namespace FileSys {
class AesCtrStorage : public IStorage {
YUZU_NON_COPYABLE(AesCtrStorage);
YUZU_NON_MOVEABLE(AesCtrStorage);
public:
static constexpr size_t BlockSize = 0x10;
static constexpr size_t KeySize = 0x10;
static constexpr size_t IvSize = 0x10;
public:
static void MakeIv(void* dst, size_t dst_size, u64 upper, s64 offset);
public:
AesCtrStorage(VirtualFile base, const void* key, size_t key_size, const void* iv,
size_t iv_size);
virtual size_t Read(u8* buffer, size_t size, size_t offset) const override;
virtual size_t Write(const u8* buffer, size_t size, size_t offset) override;
virtual size_t GetSize() const override;
private:
VirtualFile m_base_storage;
std::array<u8, KeySize> m_key;
std::array<u8, IvSize> m_iv;
mutable std::optional<Core::Crypto::AESCipher<Core::Crypto::Key128>> m_cipher;
};
} // namespace FileSys
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