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65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <optional>
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#include "core/file_sys/fssystem/fs_i_storage.h"
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#include "core/file_sys/fssystem/fs_types.h"
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namespace FileSys {
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class IntegrityVerificationStorage : public IReadOnlyStorage {
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YUZU_NON_COPYABLE(IntegrityVerificationStorage);
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YUZU_NON_MOVEABLE(IntegrityVerificationStorage);
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public:
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static constexpr s64 HashSize = 256 / 8;
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struct BlockHash {
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std::array<u8, HashSize> hash;
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};
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static_assert(std::is_trivial_v<BlockHash>);
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public:
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IntegrityVerificationStorage()
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: m_verification_block_size(0), m_verification_block_order(0),
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m_upper_layer_verification_block_size(0), m_upper_layer_verification_block_order(0) {}
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virtual ~IntegrityVerificationStorage() override {
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this->Finalize();
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}
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void Initialize(VirtualFile hs, VirtualFile ds, s64 verif_block_size,
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s64 upper_layer_verif_block_size, bool is_real_data);
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void Finalize();
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virtual size_t Read(u8* buffer, size_t size, size_t offset) const override;
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virtual size_t GetSize() const override;
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s64 GetBlockSize() const {
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return m_verification_block_size;
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}
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private:
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static void SetValidationBit(BlockHash* hash) {
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ASSERT(hash != nullptr);
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hash->hash[HashSize - 1] |= 0x80;
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}
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static bool IsValidationBit(const BlockHash* hash) {
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ASSERT(hash != nullptr);
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return (hash->hash[HashSize - 1] & 0x80) != 0;
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}
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private:
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VirtualFile m_hash_storage;
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VirtualFile m_data_storage;
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s64 m_verification_block_size;
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s64 m_verification_block_order;
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s64 m_upper_layer_verification_block_size;
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s64 m_upper_layer_verification_block_order;
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bool m_is_real_data;
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};
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} // namespace FileSys
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