dolphin/Source/Core/DiscIO/WiiEncryptionCache.h

48 lines
1.6 KiB
C++

// Copyright 2020 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <limits>
#include <memory>
#include "Common/CommonTypes.h"
#include "DiscIO/VolumeWii.h"
namespace DiscIO
{
class BlobReader;
class WiiEncryptionCache
{
public:
using Key = std::array<u8, VolumeWii::AES_KEY_SIZE>;
// The blob pointer is kept around for the lifetime of this object.
explicit WiiEncryptionCache(BlobReader* blob);
~WiiEncryptionCache();
// Encrypts exactly one group.
// If the returned pointer is nullptr, reading from the blob failed.
// If the returned pointer is not nullptr, it is guaranteed to be valid until
// the next call of this function or the destruction of this object.
const std::array<u8, VolumeWii::GROUP_TOTAL_SIZE>* EncryptGroup(u64 offset,
u64 partition_data_offset,
u64 partition_data_decrypted_size,
const Key& key);
// Encrypts a variable number of groups, as determined by the offset and size parameters.
// Supports reading groups partially.
bool EncryptGroups(u64 offset, u64 size, u8* out_ptr, u64 partition_data_offset,
u64 partition_data_decrypted_size, const Key& key);
private:
BlobReader* m_blob;
std::unique_ptr<std::array<u8, VolumeWii::GROUP_TOTAL_SIZE>> m_cache;
u64 m_cached_offset = std::numeric_limits<u64>::max();
};
} // namespace DiscIO