mirror of
https://github.com/yuzu-emu/yuzu.git
synced 2024-09-22 23:14:57 +00:00
15660bd857
In a few places, the data to be set as the IV is already within an array. We shouldn't require this data to be heap-allocated if it doesn't need to be. This allows certain callers to reduce heap churn.
36 lines
921 B
C++
36 lines
921 B
C++
// Copyright 2018 yuzu emulator team
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <array>
|
|
|
|
#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:
|
|
using IVData = std::array<u8, 16>;
|
|
|
|
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 IVData& iv);
|
|
|
|
private:
|
|
std::size_t base_offset;
|
|
|
|
// Must be mutable as operations modify cipher contexts.
|
|
mutable AESCipher<Key128> cipher;
|
|
mutable IVData iv{};
|
|
|
|
void UpdateIV(std::size_t offset) const;
|
|
};
|
|
|
|
} // namespace Core::Crypto
|