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// Copyright 2009 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "DiscIO/Volume.h"
#include <cstring>
#include <functional>
#include <map>
#include <memory>
#include <optional>
#include <ranges>
#include <span>
#include <string>
#include <type_traits>
#include <utility>
#include <vector>
#include "Common/CommonTypes.h"
#include "Common/Crypto/SHA1.h"
#include "Common/StringUtil.h"
#include "Core/Config/MainSettings.h"
#include "Core/IOS/ES/Formats.h"
#include "DiscIO/Blob.h"
#include "DiscIO/CachedBlob.h"
#include "DiscIO/DiscUtils.h"
#include "DiscIO/Enums.h"
#include "DiscIO/VolumeDisc.h"
#include "DiscIO/VolumeGC.h"
#include "DiscIO/VolumeWad.h"
#include "DiscIO/VolumeWii.h"
namespace DiscIO
{
const IOS::ES::TicketReader Volume::INVALID_TICKET{};
const IOS::ES::TMDReader Volume::INVALID_TMD{};
const std::vector<u8> Volume::INVALID_CERT_CHAIN{};
std::string Volume::DecodeString(std::span<const char> data) const
{
// strnlen to trim null bytes
std::string string(data.data(), strnlen(data.data(), data.size()));
return GetRegion() == Region::NTSC_J ? SHIFTJISToUTF8(string) : CP1252ToUTF8(string);
}
std::string Volume::FilterGameID(std::span<const char> data)
{
std::string string(data.data(), data.size());
// We don't want game IDs to contain characters that are unprintable or might cause path
// traversal. Game IDs normally only contain ASCII uppercase letters and numbers,
// but GNHE5d contains a lowercase letter, so let's allow all ASCII letters and numbers.
std::ranges::replace_if(string, std::not_fn(Common::IsAlnum), '-');
return string;
}
template <typename T>
static void AddToSyncHash(Common::SHA1::Context* context, const T& data)
{
static_assert(std::is_trivially_copyable_v<T>);
context->Update(reinterpret_cast<const u8*>(&data), sizeof(data));
}
void Volume::ReadAndAddToSyncHash(Common::SHA1::Context* context, u64 offset, u64 length,
const Partition& partition) const
{
std::vector<u8> buffer(length);
if (Read(offset, length, buffer.data(), partition))
context->Update(buffer);
}
void Volume::AddTMDToSyncHash(Common::SHA1::Context* context, const Partition& partition) const
{
// We want to hash some important parts of the TMD, but nothing that changes when fakesigning.
// (Fakesigned WADs are very popular, and we don't want people with properly signed WADs to
// unnecessarily be at a disadvantage due to most netplay partners having fakesigned WADs.)
const IOS::ES::TMDReader& tmd = GetTMD(partition);
if (!tmd.IsValid())
return;
AddToSyncHash(context, tmd.GetIOSId());
AddToSyncHash(context, tmd.GetTitleId());
AddToSyncHash(context, tmd.GetTitleFlags());
AddToSyncHash(context, tmd.GetGroupId());
AddToSyncHash(context, tmd.GetRegion());
AddToSyncHash(context, tmd.GetTitleVersion());
AddToSyncHash(context, tmd.GetBootIndex());
for (const IOS::ES::Content& content : tmd.GetContents())
AddToSyncHash(context, content);
}
std::map<Language, std::string> Volume::ReadWiiNames(const std::vector<char16_t>& data)
{
std::map<Language, std::string> names;
for (size_t i = 0; i < NUMBER_OF_LANGUAGES; ++i)
{
const size_t name_start = NAME_CHARS_LENGTH * i;
if (name_start + NAME_CHARS_LENGTH <= data.size())
{
const std::string name = UTF16BEToUTF8(data.data() + name_start, NAME_CHARS_LENGTH);
if (!name.empty())
names[static_cast<Language>(i)] = name;
}
}
return names;
}
template <typename T = std::identity>
static std::unique_ptr<VolumeDisc> TryCreateDisc(std::unique_ptr<BlobReader>& reader,
const T& reader_adapter_factory = {})
{
if (!reader)
return nullptr;
// `reader_adapter_factory` is used *after* successful magic word read.
// This prevents `CachedBlobReader` from showing warnings when failing to scrub a .dol file.
if (reader->ReadSwapped<u32>(0x18) == WII_DISC_MAGIC)
return std::make_unique<VolumeWii>(reader_adapter_factory(std::move(reader)));
if (reader->ReadSwapped<u32>(0x1C) == GAMECUBE_DISC_MAGIC)
return std::make_unique<VolumeGC>(reader_adapter_factory(std::move(reader)));
// No known magic words found
return nullptr;
}
std::unique_ptr<VolumeDisc> CreateDisc(std::unique_ptr<BlobReader> reader)
{
return TryCreateDisc(reader);
}
std::unique_ptr<VolumeDisc> CreateDisc(const std::string& path)
{
return CreateDisc(CreateBlobReader(path));
}
std::unique_ptr<VolumeDisc> CreateDiscForCore(const std::string& path)
{
auto reader = CreateBlobReader(path);
if (Config::Get(Config::MAIN_LOAD_GAME_INTO_MEMORY))
return TryCreateDisc(reader, CreateScrubbingCachedBlobReader);
return TryCreateDisc(reader);
}
static std::unique_ptr<VolumeWAD> TryCreateWAD(std::unique_ptr<BlobReader>& reader)
{
if (!reader)
return nullptr;
// Check for WAD
// 0x206962 for boot2 wads
const std::optional<u32> wad_magic = reader->ReadSwapped<u32>(0x02);
if (wad_magic == u32(0x00204973) || wad_magic == u32(0x00206962))
return std::make_unique<VolumeWAD>(std::move(reader));
// No known magic words found
return nullptr;
}
std::unique_ptr<VolumeWAD> CreateWAD(std::unique_ptr<BlobReader> reader)
{
return TryCreateWAD(reader);
}
std::unique_ptr<VolumeWAD> CreateWAD(const std::string& path)
{
return CreateWAD(CreateBlobReader(path));
}
std::unique_ptr<Volume> CreateVolume(std::unique_ptr<BlobReader> reader)
{
std::unique_ptr<VolumeDisc> disc = TryCreateDisc(reader);
if (disc)
return disc;
std::unique_ptr<VolumeWAD> wad = TryCreateWAD(reader);
if (wad)
return wad;
return nullptr;
}
std::unique_ptr<Volume> CreateVolume(const std::string& path)
{
return CreateVolume(CreateBlobReader(path));
}
} // namespace DiscIO
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