mirror of
https://gitlab.com/suyu-emu/suyu.git
synced 2024-03-15 23:15:44 +00:00
34 lines
897 B
C++
34 lines
897 B
C++
// Copyright 2018 yuzu emulator team
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <vector>
|
|
#include "core/crypto/aes_util.h"
|
|
#include "core/crypto/encryption_layer.h"
|
|
#include "core/crypto/key_manager.h"
|
|
|
|
namespace Core::Crypto {
|
|
|
|
// Sits on top of a VirtualFile and provides CTR-mode AES decription.
|
|
class CTREncryptionLayer : public EncryptionLayer {
|
|
public:
|
|
CTREncryptionLayer(FileSys::VirtualFile base, Key128 key, std::size_t base_offset);
|
|
|
|
std::size_t Read(u8* data, std::size_t length, std::size_t offset) const override;
|
|
|
|
void SetIV(const std::vector<u8>& iv);
|
|
|
|
private:
|
|
std::size_t base_offset;
|
|
|
|
// Must be mutable as operations modify cipher contexts.
|
|
mutable AESCipher<Key128> cipher;
|
|
mutable std::vector<u8> iv;
|
|
|
|
void UpdateIV(std::size_t offset) const;
|
|
};
|
|
|
|
} // namespace Core::Crypto
|