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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/file_sys/fssystem/fs_i_storage.h"
#include "core/file_sys/fssystem/fs_types.h"
namespace FileSys {
class IntegrityVerificationStorage : public IReadOnlyStorage {
YUZU_NON_COPYABLE(IntegrityVerificationStorage);
YUZU_NON_MOVEABLE(IntegrityVerificationStorage);
public:
static constexpr s64 HashSize = 256 / 8;
struct BlockHash {
u8 hash[HashSize];
};
static_assert(std::is_trivial_v<BlockHash>);
private:
VirtualFile m_hash_storage;
VirtualFile m_data_storage;
s64 m_verification_block_size;
s64 m_verification_block_order;
s64 m_upper_layer_verification_block_size;
s64 m_upper_layer_verification_block_order;
bool m_is_real_data;
public:
IntegrityVerificationStorage()
: m_verification_block_size(0), m_verification_block_order(0),
m_upper_layer_verification_block_size(0), m_upper_layer_verification_block_order(0) {}
virtual ~IntegrityVerificationStorage() override {
this->Finalize();
}
void Initialize(VirtualFile hs, VirtualFile ds, s64 verif_block_size,
s64 upper_layer_verif_block_size, bool is_real_data);
void Finalize();
virtual size_t Read(u8* buffer, size_t size, size_t offset) const override;
virtual size_t GetSize() const override;
s64 GetBlockSize() const {
return m_verification_block_size;
}
private:
static void SetValidationBit(BlockHash* hash) {
ASSERT(hash != nullptr);
hash->hash[HashSize - 1] |= 0x80;
}
static bool IsValidationBit(const BlockHash* hash) {
ASSERT(hash != nullptr);
return (hash->hash[HashSize - 1] & 0x80) != 0;
}
};
} // namespace FileSys
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