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4b73d18eaa
The old implementation of this was not able to distinguish between a title that had the common key index set to 1 because it actually was Korean and a title that had the common key index set to 1 due to fakesigning. This new implementation solves the problem by decrypting a content with each possible common key and checking which result matches the provided SHA-1 hash. The problem that the old implementation causes has only been reported to affect a certain pirated WAD of Chronos Twins DX (WC6EUP), but it's possible that the problem would start affecting more WADs if we add support for the vWii common key (which uses index 2). Adding support for the vWii common key would also prevent us from using the simpler solution of always forcing the index to 0 if the title is not Korean.
131 lines
3 KiB
C++
131 lines
3 KiB
C++
// Copyright 2019 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <map>
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#include <optional>
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#include <string>
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#include <vector>
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#include <mbedtls/md5.h>
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#include <mbedtls/sha1.h>
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#include "Common/CommonTypes.h"
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#include "Core/IOS/ES/Formats.h"
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#include "DiscIO/DiscScrubber.h"
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#include "DiscIO/Volume.h"
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// To be used as follows:
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//
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// VolumeVerifier verifier(volume);
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// verifier.Start();
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// while (verifier.GetBytesProcessed() != verifier.GetTotalBytes())
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// verifier.Process();
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// verifier.Finish();
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// auto result = verifier.GetResult();
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//
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// Start, Process and Finish may take some time to run.
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//
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// GetResult() can be called before the processing is finished, but the result will be incomplete.
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namespace DiscIO
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{
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class FileInfo;
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class VolumeVerifier final
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{
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public:
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enum class Severity
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{
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None, // Only used internally
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Low,
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Medium,
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High,
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};
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struct Problem
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{
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Severity severity;
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std::string text;
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};
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template <typename T>
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struct Hashes
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{
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T crc32;
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T md5;
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T sha1;
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};
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struct Result
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{
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Hashes<std::vector<u8>> hashes;
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std::string summary_text;
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std::vector<Problem> problems;
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};
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VolumeVerifier(const Volume& volume, Hashes<bool> hashes_to_calculate);
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~VolumeVerifier();
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void Start();
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void Process();
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u64 GetBytesProcessed() const;
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u64 GetTotalBytes() const;
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void Finish();
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const Result& GetResult() const;
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private:
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struct BlockToVerify
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{
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Partition partition;
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u64 offset;
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u64 block_index;
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};
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void CheckPartitions();
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bool CheckPartition(const Partition& partition); // Returns false if partition should be ignored
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std::string GetPartitionName(std::optional<u32> type) const;
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void CheckCorrectlySigned(const Partition& partition, std::string error_text);
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bool IsDebugSigned() const;
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bool ShouldHaveChannelPartition() const;
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bool ShouldHaveInstallPartition() const;
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bool ShouldHaveMasterpiecePartitions() const;
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bool ShouldBeDualLayer() const;
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void CheckDiscSize();
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u64 GetBiggestUsedOffset() const;
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u64 GetBiggestUsedOffset(const FileInfo& file_info) const;
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void CheckMisc();
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void SetUpHashing();
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void AddProblem(Severity severity, std::string text);
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const Volume& m_volume;
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Result m_result;
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bool m_is_tgc = false;
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bool m_is_datel = false;
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bool m_is_not_retail = false;
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Hashes<bool> m_hashes_to_calculate{};
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bool m_calculating_any_hash = false;
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unsigned long m_crc32_context = 0;
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mbedtls_md5_context m_md5_context;
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mbedtls_sha1_context m_sha1_context;
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DiscScrubber m_scrubber;
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IOS::ES::TicketReader m_ticket;
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std::vector<u64> m_content_offsets;
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u16 m_content_index = 0;
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std::vector<BlockToVerify> m_blocks;
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size_t m_block_index = 0; // Index in m_blocks, not index in a specific partition
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std::map<Partition, size_t> m_block_errors;
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std::map<Partition, size_t> m_unused_block_errors;
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bool m_started = false;
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bool m_done = false;
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u64 m_progress = 0;
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u64 m_max_progress = 0;
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};
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} // namespace DiscIO
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