// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <cstddef>
#include <cstring>
#include "common/hex_util.h"
#include "common/logging/log.h"
#include "core/file_sys/content_archive.h"
#include "core/file_sys/control_metadata.h"
#include "core/file_sys/ips_layer.h"
#include "core/file_sys/patch_manager.h"
#include "core/file_sys/registered_cache.h"
#include "core/file_sys/romfs.h"
#include "core/file_sys/vfs_layered.h"
#include "core/file_sys/vfs_vector.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/loader/loader.h"
namespace FileSys {
constexpr u64 SINGLE_BYTE_MODULUS = 0x100;
constexpr u64 DLC_BASE_TITLE_ID_MASK = 0xFFFFFFFFFFFFE000;
struct NSOBuildHeader {
u32_le magic;
INSERT_PADDING_BYTES(0x3C);
std::array<u8, 0x20> build_id;
INSERT_PADDING_BYTES(0xA0);
};
static_assert(sizeof(NSOBuildHeader) == 0x100, "NSOBuildHeader has incorrect size.");
std::string FormatTitleVersion(u32 version, TitleVersionFormat format) {
std::array<u8, sizeof(u32)> bytes{};
bytes[0] = version % SINGLE_BYTE_MODULUS;
for (std::size_t i = 1; i < bytes.size(); ++i) {
version /= SINGLE_BYTE_MODULUS;
bytes[i] = version % SINGLE_BYTE_MODULUS;
}
if (format == TitleVersionFormat::FourElements)
return fmt::format("v{}.{}.{}.{}", bytes[3], bytes[2], bytes[1], bytes[0]);
return fmt::format("v{}.{}.{}", bytes[3], bytes[2], bytes[1]);
}
PatchManager::PatchManager(u64 title_id) : title_id(title_id) {}
PatchManager::~PatchManager() = default;
VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
LOG_INFO(Loader, "Patching ExeFS for title_id={:016X}", title_id);
if (exefs == nullptr)
return exefs;
const auto installed = Service::FileSystem::GetUnionContents();
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
const auto update = installed->GetEntry(update_tid, ContentRecordType::Program);
if (update != nullptr && update->GetExeFS() != nullptr &&
update->GetStatus() == Loader::ResultStatus::ErrorMissingBKTRBaseRomFS) {
LOG_INFO(Loader, " ExeFS: Update ({}) applied successfully",
FormatTitleVersion(installed->GetEntryVersion(update_tid).get_value_or(0)));
exefs = update->GetExeFS();
}
return exefs;
}
static std::vector<VirtualFile> CollectPatches(const std::vector<VirtualDir>& patch_dirs,
const std::string& build_id) {
std::vector<VirtualFile> out;
out.reserve(patch_dirs.size());
for (const auto& subdir : patch_dirs) {
auto exefs_dir = subdir->GetSubdirectory("exefs");
if (exefs_dir != nullptr) {
for (const auto& file : exefs_dir->GetFiles()) {
if (file->GetExtension() == "ips") {
auto name = file->GetName();
const auto p1 = name.substr(0, name.find('.'));
const auto this_build_id = p1.substr(0, p1.find_last_not_of('0') + 1);
if (build_id == this_build_id)
out.push_back(file);
} else if (file->GetExtension() == "pchtxt") {
IPSwitchCompiler compiler{file};
if (!compiler.IsValid())
continue;
auto this_build_id = Common::HexArrayToString(compiler.GetBuildID());
this_build_id =
this_build_id.substr(0, this_build_id.find_last_not_of('0') + 1);
if (build_id == this_build_id)
out.push_back(file);
}
}
}
}
return out;
}
std::vector<u8> PatchManager::PatchNSO(const std::vector<u8>& nso) const {
if (nso.size() < 0x100)
return nso;
NSOBuildHeader header;
std::memcpy(&header, nso.data(), sizeof(NSOBuildHeader));
if (header.magic != Common::MakeMagic('N', 'S', 'O', '0'))
return nso;
const auto build_id_raw = Common::HexArrayToString(header.build_id);
const auto build_id = build_id_raw.substr(0, build_id_raw.find_last_not_of('0') + 1);
LOG_INFO(Loader, "Patching NSO for build_id={}", build_id);
const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
const auto patches = CollectPatches(patch_dirs, build_id);
auto out = nso;
for (const auto& patch_file : patches) {
if (patch_file->GetExtension() == "ips") {
LOG_INFO(Loader, " - Applying IPS patch from mod \"{}\"",
patch_file->GetContainingDirectory()->GetParentDirectory()->GetName());
const auto patched = PatchIPS(std::make_shared<VectorVfsFile>(out), patch_file);
if (patched != nullptr)
out = patched->ReadAllBytes();
} else if (patch_file->GetExtension() == "pchtxt") {
LOG_INFO(Loader, " - Applying IPSwitch patch from mod \"{}\"",
patch_file->GetContainingDirectory()->GetParentDirectory()->GetName());
const IPSwitchCompiler compiler{patch_file};
const auto patched = compiler.Apply(std::make_shared<VectorVfsFile>(out));
if (patched != nullptr)
out = patched->ReadAllBytes();
}
}
if (out.size() < 0x100)
return nso;
std::memcpy(out.data(), &header, sizeof(NSOBuildHeader));
return out;
}
bool PatchManager::HasNSOPatch(const std::array<u8, 32>& build_id_) const {
const auto build_id_raw = Common::HexArrayToString(build_id_);
const auto build_id = build_id_raw.substr(0, build_id_raw.find_last_not_of('0') + 1);
LOG_INFO(Loader, "Querying NSO patch existence for build_id={}", build_id);
const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
return !CollectPatches(patch_dirs, build_id).empty();
}
static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType type) {
const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
if ((type != ContentRecordType::Program && type != ContentRecordType::Data) ||
load_dir == nullptr || load_dir->GetSize() <= 0) {
return;
}
auto extracted = ExtractRomFS(romfs);
if (extracted == nullptr) {
return;
}
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
std::vector<VirtualDir> layers;
std::vector<VirtualDir> layers_ext;
layers.reserve(patch_dirs.size() + 1);
layers_ext.reserve(patch_dirs.size() + 1);
for (const auto& subdir : patch_dirs) {
auto romfs_dir = subdir->GetSubdirectory("romfs");
if (romfs_dir != nullptr)
layers.push_back(std::move(romfs_dir));
auto ext_dir = subdir->GetSubdirectory("romfs_ext");
if (ext_dir != nullptr)
layers_ext.push_back(std::move(ext_dir));
}
layers.push_back(std::move(extracted));
auto layered = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers));
if (layered == nullptr) {
return;
}
auto layered_ext = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers_ext));
auto packed = CreateRomFS(std::move(layered), std::move(layered_ext));
if (packed == nullptr) {
return;
}
LOG_INFO(Loader, " RomFS: LayeredFS patches applied successfully");
romfs = std::move(packed);
}
VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset, ContentRecordType type,
VirtualFile update_raw) const {
const auto log_string = fmt::format("Patching RomFS for title_id={:016X}, type={:02X}",
title_id, static_cast<u8>(type))
.c_str();
if (type == ContentRecordType::Program || type == ContentRecordType::Data)
LOG_INFO(Loader, log_string);
else
LOG_DEBUG(Loader, log_string);
if (romfs == nullptr)
return romfs;
const auto installed = Service::FileSystem::GetUnionContents();
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
const auto update = installed->GetEntryRaw(update_tid, type);
if (update != nullptr) {
const auto new_nca = std::make_shared<NCA>(update, romfs, ivfc_offset);
if (new_nca->GetStatus() == Loader::ResultStatus::Success &&
new_nca->GetRomFS() != nullptr) {
LOG_INFO(Loader, " RomFS: Update ({}) applied successfully",
FormatTitleVersion(installed->GetEntryVersion(update_tid).get_value_or(0)));
romfs = new_nca->GetRomFS();
}
} else if (update_raw != nullptr) {
const auto new_nca = std::make_shared<NCA>(update_raw, romfs, ivfc_offset);
if (new_nca->GetStatus() == Loader::ResultStatus::Success &&
new_nca->GetRomFS() != nullptr) {
LOG_INFO(Loader, " RomFS: Update (PACKED) applied successfully");
romfs = new_nca->GetRomFS();
}
}
// LayeredFS
ApplyLayeredFS(romfs, title_id, type);
return romfs;
}
static void AppendCommaIfNotEmpty(std::string& to, const std::string& with) {
if (to.empty())
to += with;
else
to += ", " + with;
}
static bool IsDirValidAndNonEmpty(const VirtualDir& dir) {
return dir != nullptr && (!dir->GetFiles().empty() || !dir->GetSubdirectories().empty());
}
std::map<std::string, std::string, std::less<>> PatchManager::GetPatchVersionNames(
VirtualFile update_raw) const {
std::map<std::string, std::string, std::less<>> out;
const auto installed = Service::FileSystem::GetUnionContents();
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
PatchManager update{update_tid};
auto [nacp, discard_icon_file] = update.GetControlMetadata();
if (nacp != nullptr) {
out.insert_or_assign("Update", nacp->GetVersionString());
} else {
if (installed->HasEntry(update_tid, ContentRecordType::Program)) {
const auto meta_ver = installed->GetEntryVersion(update_tid);
if (meta_ver == boost::none || meta_ver.get() == 0) {
out.insert_or_assign("Update", "");
} else {
out.insert_or_assign(
"Update",
FormatTitleVersion(meta_ver.get(), TitleVersionFormat::ThreeElements));
}
} else if (update_raw != nullptr) {
out.insert_or_assign("Update", "PACKED");
}
}
// General Mods (LayeredFS and IPS)
const auto mod_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
if (mod_dir != nullptr && mod_dir->GetSize() > 0) {
for (const auto& mod : mod_dir->GetSubdirectories()) {
std::string types;
const auto exefs_dir = mod->GetSubdirectory("exefs");
if (IsDirValidAndNonEmpty(exefs_dir)) {
bool ips = false;
bool ipswitch = false;
for (const auto& file : exefs_dir->GetFiles()) {
if (file->GetExtension() == "ips")
ips = true;
else if (file->GetExtension() == "pchtxt")
ipswitch = true;
}
if (ips)
AppendCommaIfNotEmpty(types, "IPS");
if (ipswitch)
AppendCommaIfNotEmpty(types, "IPSwitch");
}
if (IsDirValidAndNonEmpty(mod->GetSubdirectory("romfs")))
AppendCommaIfNotEmpty(types, "LayeredFS");
if (types.empty())
continue;
out.insert_or_assign(mod->GetName(), types);
}
}
// DLC
const auto dlc_entries = installed->ListEntriesFilter(TitleType::AOC, ContentRecordType::Data);
std::vector<RegisteredCacheEntry> dlc_match;
dlc_match.reserve(dlc_entries.size());
std::copy_if(dlc_entries.begin(), dlc_entries.end(), std::back_inserter(dlc_match),
[this, &installed](const RegisteredCacheEntry& entry) {
return (entry.title_id & DLC_BASE_TITLE_ID_MASK) == title_id &&
installed->GetEntry(entry)->GetStatus() ==
Loader::ResultStatus::Success;
});
if (!dlc_match.empty()) {
// Ensure sorted so DLC IDs show in order.
std::sort(dlc_match.begin(), dlc_match.end());
std::string list;
for (size_t i = 0; i < dlc_match.size() - 1; ++i)
list += fmt::format("{}, ", dlc_match[i].title_id & 0x7FF);
list += fmt::format("{}", dlc_match.back().title_id & 0x7FF);
out.insert_or_assign("DLC", std::move(list));
}
return out;
}
std::pair<std::unique_ptr<NACP>, VirtualFile> PatchManager::GetControlMetadata() const {
const auto installed{Service::FileSystem::GetUnionContents()};
const auto base_control_nca = installed->GetEntry(title_id, ContentRecordType::Control);
if (base_control_nca == nullptr)
return {};
return ParseControlNCA(*base_control_nca);
}
std::pair<std::unique_ptr<NACP>, VirtualFile> PatchManager::ParseControlNCA(const NCA& nca) const {
const auto base_romfs = nca.GetRomFS();
if (base_romfs == nullptr)
return {};
const auto romfs = PatchRomFS(base_romfs, nca.GetBaseIVFCOffset(), ContentRecordType::Control);
if (romfs == nullptr)
return {};
const auto extracted = ExtractRomFS(romfs);
if (extracted == nullptr)
return {};
auto nacp_file = extracted->GetFile("control.nacp");
if (nacp_file == nullptr)
nacp_file = extracted->GetFile("Control.nacp");
auto nacp = nacp_file == nullptr ? nullptr : std::make_unique<NACP>(nacp_file);
VirtualFile icon_file;
for (const auto& language : FileSys::LANGUAGE_NAMES) {
icon_file = extracted->GetFile("icon_" + std::string(language) + ".dat");
if (icon_file != nullptr)
break;
}
return {std::move(nacp), icon_file};
}
} // namespace FileSys