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suyu/src/core/crypto/ctr_encryption_layer.h

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2018-07-28 05:55:23 +02:00
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "aes_util.h"
#include "encryption_layer.h"
#include "key_manager.h"
namespace Crypto {
// Sits on top of a VirtualFile and provides CTR-mode AES decription.
struct CTREncryptionLayer : public EncryptionLayer {
CTREncryptionLayer(FileSys::VirtualFile base, Key128 key, size_t base_offset);
size_t Read(u8* data, size_t length, size_t offset) const override;
void SetIV(std::vector<u8> iv);
private:
size_t base_offset;
// Must be mutable as operations modify cipher contexts.
mutable AESCipher<Key128> cipher;
mutable std::vector<u8> iv;
void UpdateIV(size_t offset) const;
};
} // namespace Crypto