dolphin/Source/Core/DiscIO/NANDContentLoader.cpp

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// Copyright 2009 Dolphin Emulator Project
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// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "DiscIO/NANDContentLoader.h"
#include <algorithm>
#include <array>
#include <cinttypes>
#include <cstddef>
#include <cstdio>
#include <cstring>
#include <functional>
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "Common/Align.h"
#include "Common/CommonTypes.h"
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#include "Common/Crypto/AES.h"
#include "Common/File.h"
#include "Common/FileUtil.h"
#include "Common/Logging/Log.h"
#include "Common/MsgHandler.h"
#include "Common/NandPaths.h"
#include "Common/StringUtil.h"
#include "Common/Swap.h"
// TODO: kill this dependency.
#include "Core/IOS/ES/Formats.h"
#include "DiscIO/WiiWad.h"
namespace DiscIO
{
NANDContentData::~NANDContentData() = default;
NANDContentDataFile::NANDContentDataFile(const std::string& filename) : m_filename{filename}
{
}
NANDContentDataFile::~NANDContentDataFile() = default;
void NANDContentDataFile::EnsureOpen()
{
if (!m_file)
m_file = std::make_unique<File::IOFile>(m_filename, "rb");
else if (!m_file->IsOpen())
m_file->Open(m_filename, "rb");
}
void NANDContentDataFile::Open()
{
EnsureOpen();
}
std::vector<u8> NANDContentDataFile::Get()
{
EnsureOpen();
if (!m_file->IsGood())
return {};
u64 size = m_file->GetSize();
if (size == 0)
return {};
std::vector<u8> result(size);
m_file->ReadBytes(result.data(), result.size());
return result;
}
bool NANDContentDataFile::GetRange(u32 start, u32 size, u8* buffer)
{
EnsureOpen();
if (!m_file->IsGood())
return false;
if (!m_file->Seek(start, SEEK_SET))
return false;
return m_file->ReadBytes(buffer, static_cast<size_t>(size));
}
void NANDContentDataFile::Close()
{
if (m_file && m_file->IsOpen())
m_file->Close();
}
bool NANDContentDataBuffer::GetRange(u32 start, u32 size, u8* buffer)
{
if (start + size > m_buffer.size())
return false;
std::copy_n(&m_buffer[start], size, buffer);
return true;
}
NANDContentLoader::NANDContentLoader(const std::string& content_name, Common::FromWhichRoot from)
: m_root(from)
{
m_Valid = Initialize(content_name);
}
NANDContentLoader::~NANDContentLoader()
{
}
bool NANDContentLoader::IsValid() const
{
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return m_Valid;
}
const NANDContent* NANDContentLoader::GetContentByID(u32 id) const
{
const auto iterator = std::find_if(m_Content.begin(), m_Content.end(), [id](const auto& content) {
return content.m_metadata.id == id;
});
return iterator != m_Content.end() ? &*iterator : nullptr;
}
const NANDContent* NANDContentLoader::GetContentByIndex(int index) const
{
for (auto& Content : m_Content)
{
if (Content.m_metadata.index == index)
{
return &Content;
}
}
return nullptr;
}
bool NANDContentLoader::Initialize(const std::string& name)
{
if (name.empty())
return false;
m_Path = name;
WiiWAD wad(name);
std::vector<u8> data_app;
if (wad.IsValid())
{
m_IsWAD = true;
m_ticket = wad.GetTicket();
m_tmd = wad.GetTMD();
data_app = wad.GetDataApp();
}
else
{
std::string tmd_filename(m_Path);
if (tmd_filename.back() == '/')
tmd_filename += "title.tmd";
else
m_Path = tmd_filename.substr(0, tmd_filename.find("title.tmd"));
File::IOFile tmd_file(tmd_filename, "rb");
if (!tmd_file)
{
WARN_LOG(DISCIO, "CreateFromDirectory: error opening %s", tmd_filename.c_str());
return false;
}
std::vector<u8> bytes(File::GetSize(tmd_filename));
tmd_file.ReadBytes(bytes.data(), bytes.size());
m_tmd.SetBytes(std::move(bytes));
m_ticket = FindSignedTicket(m_tmd.GetTitleId());
}
InitializeContentEntries(data_app);
return true;
}
void NANDContentLoader::InitializeContentEntries(const std::vector<u8>& data_app)
{
if (!m_ticket.IsValid())
{
ERROR_LOG(IOS_ES, "No valid ticket for title %016" PRIx64, m_tmd.GetTitleId());
return;
}
const std::vector<IOS::ES::Content> contents = m_tmd.GetContents();
m_Content.resize(contents.size());
u32 data_app_offset = 0;
const std::vector<u8> title_key = m_ticket.GetTitleKey();
IOS::ES::SharedContentMap shared_content{m_root};
for (size_t i = 0; i < contents.size(); ++i)
{
const auto& content = contents.at(i);
if (m_IsWAD)
{
// The content index is used as IV (2 bytes); the remaining 14 bytes are zeroes.
std::array<u8, 16> iv{};
iv[0] = static_cast<u8>(content.index >> 8) & 0xFF;
iv[1] = static_cast<u8>(content.index) & 0xFF;
u32 rounded_size = Common::AlignUp(static_cast<u32>(content.size), 0x40);
m_Content[i].m_Data = std::make_unique<NANDContentDataBuffer>(Common::AES::Decrypt(
title_key.data(), iv.data(), &data_app[data_app_offset], rounded_size));
data_app_offset += rounded_size;
}
else
{
std::string filename;
if (content.IsShared())
filename = *shared_content.GetFilenameFromSHA1(content.sha1);
else
filename = StringFromFormat("%s/%08x.app", m_Path.c_str(), content.id);
m_Content[i].m_Data = std::make_unique<NANDContentDataFile>(filename);
}
m_Content[i].m_metadata = std::move(content);
}
}
NANDContentManager::~NANDContentManager()
{
}
const NANDContentLoader& NANDContentManager::GetNANDLoader(const std::string& content_path,
Common::FromWhichRoot from)
{
auto it = m_map.find(content_path);
if (it != m_map.end())
return *it->second;
return *m_map
.emplace_hint(it, std::make_pair(content_path, std::make_unique<NANDContentLoader>(
content_path, from)))
->second;
}
const NANDContentLoader& NANDContentManager::GetNANDLoader(u64 title_id, Common::FromWhichRoot from)
{
std::string path = Common::GetTitleContentPath(title_id, from);
return GetNANDLoader(path, from);
}
void NANDContentManager::ClearCache()
{
m_map.clear();
}
IOS::ES::TicketReader FindSignedTicket(u64 title_id)
{
std::string ticket_filename = Common::GetTicketFileName(title_id, Common::FROM_CONFIGURED_ROOT);
File::IOFile ticket_file(ticket_filename, "rb");
if (!ticket_file)
{
return IOS::ES::TicketReader{};
}
std::vector<u8> signed_ticket(ticket_file.GetSize());
if (!ticket_file.ReadBytes(signed_ticket.data(), signed_ticket.size()))
{
return IOS::ES::TicketReader{};
}
return IOS::ES::TicketReader{std::move(signed_ticket)};
}
} // namespace end