file_sys: Add RegisteredCache
Manages NAND NCA get and install.
This commit is contained in:
Zach Hilman
parent
9aab787122
commit
a91983b11c
435
src/core/file_sys/registered_cache.cpp
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435
src/core/file_sys/registered_cache.cpp
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@ -0,0 +1,435 @@
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// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <regex>
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#include <mbedtls/sha256.h>
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#include "common/assert.h"
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#include "common/hex_util.h"
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#include "common/logging/log.h"
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#include "core/crypto/encryption_layer.h"
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#include "core/file_sys/card_image.h"
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#include "core/file_sys/nca_metadata.h"
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#include "core/file_sys/registered_cache.h"
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#include "core/file_sys/vfs_concat.h"
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namespace FileSys {
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std::string RegisteredCacheEntry::DebugInfo() const {
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return fmt::format("title_id={:016X}, content_type={:02X}", title_id, static_cast<u8>(type));
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}
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bool operator<(const RegisteredCacheEntry& lhs, const RegisteredCacheEntry& rhs) {
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return (lhs.title_id < rhs.title_id) || (lhs.title_id == rhs.title_id && lhs.type < rhs.type);
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}
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static bool FollowsTwoDigitDirFormat(std::string_view name) {
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const static std::regex two_digit_regex(
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"000000[0123456789abcdefABCDEF][0123456789abcdefABCDEF]");
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return std::regex_match(name.begin(), name.end(), two_digit_regex);
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}
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static bool FollowsNcaIdFormat(std::string_view name) {
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const static std::regex nca_id_regex("[0123456789abcdefABCDEF]+.nca");
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return name.size() == 36 && std::regex_match(name.begin(), name.end(), nca_id_regex);
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}
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static std::string GetRelativePathFromNcaID(const std::array<u8, 16>& nca_id, bool second_hex_upper,
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bool within_two_digit) {
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if (!within_two_digit)
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return fmt::format("/{}.nca", HexArrayToString(nca_id, second_hex_upper));
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Core::Crypto::SHA256Hash hash{};
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mbedtls_sha256(nca_id.data(), nca_id.size(), hash.data(), 0);
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return fmt::format("/000000{:02X}/{}.nca", hash[0], HexArrayToString(nca_id, second_hex_upper));
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}
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static std::string GetCNMTName(TitleType type, u64 title_id) {
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constexpr std::array<const char*, 9> TITLE_TYPE_NAMES{
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"SystemProgram",
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"SystemData",
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"SystemUpdate",
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"BootImagePackage",
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"BootImagePackageSafe",
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"Application",
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"Patch",
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"AddOnContent",
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"" ///< Currently unknown 'DeltaTitle'
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};
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size_t index = static_cast<size_t>(type);
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if (index >= 0x80)
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index -= 0x80;
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return fmt::format("{}_{:016x}.cnmt", TITLE_TYPE_NAMES[index], title_id);
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}
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static ContentRecordType GetCRTypeFromNCAType(NCAContentType type) {
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switch (type) {
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case NCAContentType::Program:
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// TODO(DarkLordZach): Differentiate between Program and Patch
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return ContentRecordType::Program;
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case NCAContentType::Meta:
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return ContentRecordType::Meta;
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case NCAContentType::Control:
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return ContentRecordType::Control;
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case NCAContentType::Data:
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return ContentRecordType::Data;
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case NCAContentType::Manual:
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// TODO(DarkLordZach): Peek at NCA contents to differentiate Manual and Legal.
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return ContentRecordType::Manual;
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default:
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UNREACHABLE();
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}
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}
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VirtualFile RegisteredCache::OpenFileOrDirectoryConcat(const VirtualDir& dir,
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std::string_view path) const {
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if (dir->GetFileRelative(path) != nullptr)
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return dir->GetFileRelative(path);
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if (dir->GetDirectoryRelative(path) != nullptr) {
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const auto nca_dir = dir->GetDirectoryRelative(path);
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VirtualFile file = nullptr;
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const auto files = nca_dir->GetFiles();
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if (files.size() == 1 && files[0]->GetName() == "00")
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file = files[0];
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else {
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std::vector<VirtualFile> concat;
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for (u8 i = 0; i < 0x10; ++i) {
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auto next = nca_dir->GetFile(fmt::format("{:02X}", i));
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if (next != nullptr)
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concat.push_back(std::move(next));
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else {
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next = nca_dir->GetFile(fmt::format("{:02x}", i));
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if (next != nullptr)
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concat.push_back(std::move(next));
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else
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break;
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}
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}
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if (concat.empty())
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return nullptr;
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file = FileSys::ConcatenateFiles(concat);
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}
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return file;
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}
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return nullptr;
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}
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VirtualFile RegisteredCache::GetFileAtID(NcaID id) const {
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VirtualFile file;
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for (u8 i = 0; i < 4; ++i) {
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file = OpenFileOrDirectoryConcat(
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dir, GetRelativePathFromNcaID(id, (i & 0b10) == 0, (i & 0b01) == 0));
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if (file != nullptr)
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return file;
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}
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return file;
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}
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boost::optional<NcaID> RegisteredCache::GetNcaIDFromMetadata(u64 title_id,
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ContentRecordType type) const {
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if (type == ContentRecordType::Meta && meta_id.find(title_id) != meta_id.end())
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return meta_id.at(title_id);
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if (meta.find(title_id) == meta.end())
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return boost::none;
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const auto& cnmt = meta.at(title_id);
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const auto iter = std::find_if(cnmt.GetContentRecords().begin(), cnmt.GetContentRecords().end(),
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[type](const ContentRecord& rec) { return rec.type == type; });
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if (iter == cnmt.GetContentRecords().end())
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return boost::none;
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return boost::make_optional(iter->nca_id);
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}
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void RegisteredCache::AccumulateFiles(std::vector<NcaID>& ids) const {
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for (const auto& d2_dir : dir->GetSubdirectories()) {
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if (FollowsNcaIdFormat(d2_dir->GetName())) {
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ids.push_back(HexStringToArray<0x10, true>(d2_dir->GetName().substr(0, 0x20)));
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continue;
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}
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if (!FollowsTwoDigitDirFormat(d2_dir->GetName()))
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continue;
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for (const auto& nca_dir : d2_dir->GetSubdirectories()) {
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if (!FollowsNcaIdFormat(nca_dir->GetName()))
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continue;
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ids.push_back(HexStringToArray<0x10, true>(nca_dir->GetName().substr(0, 0x20)));
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}
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for (const auto& nca_file : d2_dir->GetFiles()) {
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if (!FollowsNcaIdFormat(nca_file->GetName()))
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continue;
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ids.push_back(HexStringToArray<0x10, true>(nca_file->GetName().substr(0, 0x20)));
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}
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}
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for (const auto& d2_file : dir->GetFiles()) {
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if (FollowsNcaIdFormat(d2_file->GetName()))
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ids.push_back(HexStringToArray<0x10, true>(d2_file->GetName().substr(0, 0x20)));
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}
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}
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void RegisteredCache::ProcessFiles(const std::vector<NcaID>& ids) {
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for (const auto& id : ids) {
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const auto file = GetFileAtID(id);
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if (file == nullptr)
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continue;
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const auto nca = std::make_shared<NCA>(parser(file, id));
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if (nca->GetStatus() != Loader::ResultStatus::Success ||
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nca->GetType() != NCAContentType::Meta)
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continue;
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const auto section0 = nca->GetSubdirectories()[0];
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for (const auto& file : section0->GetFiles()) {
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if (file->GetExtension() != "cnmt")
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continue;
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meta.insert_or_assign(nca->GetTitleId(), CNMT(file));
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meta_id.insert_or_assign(nca->GetTitleId(), id);
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break;
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}
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}
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}
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void RegisteredCache::AccumulateYuzuMeta() {
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const auto dir = this->dir->GetSubdirectory("yuzu_meta");
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if (dir == nullptr)
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return;
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for (const auto& file : dir->GetFiles()) {
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if (file->GetExtension() != "cnmt")
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continue;
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CNMT cnmt(file);
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yuzu_meta.insert_or_assign(cnmt.GetTitleID(), std::move(cnmt));
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}
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}
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void RegisteredCache::Refresh() {
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if (dir == nullptr)
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return;
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std::vector<NcaID> ids;
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AccumulateFiles(ids);
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ProcessFiles(ids);
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AccumulateYuzuMeta();
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}
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RegisteredCache::RegisteredCache(VirtualDir dir_, RegisteredCacheParsingFunction parsing_function)
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: dir(std::move(dir_)), parser(std::move(parsing_function)) {
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Refresh();
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}
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bool RegisteredCache::HasEntry(u64 title_id, ContentRecordType type) const {
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return GetEntryRaw(title_id, type) != nullptr;
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}
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bool RegisteredCache::HasEntry(RegisteredCacheEntry entry) const {
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return GetEntryRaw(entry) != nullptr;
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}
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VirtualFile RegisteredCache::GetEntryRaw(u64 title_id, ContentRecordType type) const {
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const auto id = GetNcaIDFromMetadata(title_id, type);
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if (id == boost::none)
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return nullptr;
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return parser(GetFileAtID(id.get()), id.get());
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}
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VirtualFile RegisteredCache::GetEntryRaw(RegisteredCacheEntry entry) const {
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return GetEntryRaw(entry.title_id, entry.type);
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}
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std::shared_ptr<NCA> RegisteredCache::GetEntry(u64 title_id, ContentRecordType type) const {
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const auto raw = GetEntryRaw(title_id, type);
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if (raw == nullptr)
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return nullptr;
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return std::make_shared<NCA>(raw);
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}
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std::shared_ptr<NCA> RegisteredCache::GetEntry(RegisteredCacheEntry entry) const {
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return GetEntry(entry.title_id, entry.type);
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}
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template <typename T>
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void RegisteredCache::IterateAllMetadata(
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std::vector<T>& out, std::function<T(const CNMT&, const ContentRecord&)> proc,
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std::function<bool(const CNMT&, const ContentRecord&)> filter) const {
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for (const auto& kv : meta) {
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const auto& cnmt = kv.second;
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if (filter(cnmt, EMPTY_META_CONTENT_RECORD))
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out.push_back(proc(cnmt, EMPTY_META_CONTENT_RECORD));
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for (const auto& rec : cnmt.GetContentRecords()) {
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if (GetFileAtID(rec.nca_id) != nullptr && filter(cnmt, rec)) {
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out.push_back(proc(cnmt, rec));
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}
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}
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}
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for (const auto& kv : yuzu_meta) {
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const auto& cnmt = kv.second;
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for (const auto& rec : cnmt.GetContentRecords()) {
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if (GetFileAtID(rec.nca_id) != nullptr && filter(cnmt, rec)) {
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out.push_back(proc(cnmt, rec));
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}
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}
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}
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}
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std::vector<RegisteredCacheEntry> RegisteredCache::ListEntries() const {
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std::vector<RegisteredCacheEntry> out;
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IterateAllMetadata<RegisteredCacheEntry>(
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out,
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[](const CNMT& c, const ContentRecord& r) {
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return RegisteredCacheEntry{c.GetTitleID(), r.type};
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},
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[](const CNMT& c, const ContentRecord& r) { return true; });
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return out;
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}
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std::vector<RegisteredCacheEntry> RegisteredCache::ListEntriesFilter(
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boost::optional<TitleType> title_type, boost::optional<ContentRecordType> record_type,
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boost::optional<u64> title_id) const {
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std::vector<RegisteredCacheEntry> out;
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IterateAllMetadata<RegisteredCacheEntry>(
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out,
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[](const CNMT& c, const ContentRecord& r) {
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return RegisteredCacheEntry{c.GetTitleID(), r.type};
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},
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[&title_type, &record_type, &title_id](const CNMT& c, const ContentRecord& r) {
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if (title_type != boost::none && title_type.get() != c.GetType())
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return false;
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if (record_type != boost::none && record_type.get() != r.type)
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return false;
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if (title_id != boost::none && title_id.get() != c.GetTitleID())
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return false;
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return true;
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});
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return out;
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}
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static std::shared_ptr<NCA> GetNCAFromXCIForID(std::shared_ptr<XCI> xci, const NcaID& id) {
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const auto filename = fmt::format("{}.nca", HexArrayToString(id, false));
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const auto iter =
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std::find_if(xci->GetNCAs().begin(), xci->GetNCAs().end(),
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[&filename](std::shared_ptr<NCA> nca) { return nca->GetName() == filename; });
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return iter == xci->GetNCAs().end() ? nullptr : *iter;
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}
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bool RegisteredCache::InstallEntry(std::shared_ptr<XCI> xci) {
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const auto& ncas = xci->GetNCAs();
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const auto& meta_iter = std::find_if(ncas.begin(), ncas.end(), [](std::shared_ptr<NCA> nca) {
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return nca->GetType() == NCAContentType::Meta;
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});
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if (meta_iter == ncas.end()) {
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LOG_ERROR(Loader, "The XCI you are attempting to install does not have a metadata NCA and "
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"is therefore malformed. Double check your encryption keys.");
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return false;
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}
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// Install Metadata File
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const auto meta_id_raw = (*meta_iter)->GetName().substr(0, 32);
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const auto meta_id = HexStringToArray<16>(meta_id_raw);
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if (!RawInstallNCA(*meta_iter, meta_id))
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return false;
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// Install all the other NCAs
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const auto section0 = (*meta_iter)->GetSubdirectories()[0];
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const auto cnmt_file = section0->GetFiles()[0];
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const CNMT cnmt(cnmt_file);
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for (const auto& record : cnmt.GetContentRecords()) {
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const auto nca = GetNCAFromXCIForID(xci, record.nca_id);
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if (nca == nullptr || !RawInstallNCA(nca, record.nca_id))
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return false;
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}
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Refresh();
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return true;
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}
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bool RegisteredCache::InstallEntry(std::shared_ptr<NCA> nca, TitleType type) {
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CNMTHeader header{
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nca->GetTitleId(), ///< Title ID
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0, ///< Ignore/Default title version
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type, ///< Type
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{}, ///< Padding
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0x10, ///< Default table offset
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1, ///< 1 Content Entry
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0, ///< No Meta Entries
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{}, ///< Padding
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};
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OptionalHeader opt_header{0, 0};
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ContentRecord c_rec{{}, {}, {}, GetCRTypeFromNCAType(nca->GetType()), {}};
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const auto& data = nca->GetBaseFile()->ReadBytes(0x100000);
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mbedtls_sha256(data.data(), data.size(), c_rec.hash.data(), 0);
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memcpy(&c_rec.nca_id, &c_rec.hash, 16);
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const CNMT new_cnmt(header, opt_header, {c_rec}, {});
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return RawInstallYuzuMeta(new_cnmt) && RawInstallNCA(nca, c_rec.nca_id);
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}
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bool RegisteredCache::RawInstallNCA(std::shared_ptr<NCA> nca, boost::optional<NcaID> override_id) {
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const auto in = nca->GetBaseFile();
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Core::Crypto::SHA256Hash hash{};
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// Calculate NcaID
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// NOTE: Because computing the SHA256 of an entire NCA is quite expensive (especially if the
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// game is massive), we're going to cheat and only hash the first MB of the NCA.
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// Also, for XCIs the NcaID matters, so if the override id isn't none, use that.
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NcaID id{};
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if (override_id == boost::none) {
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const auto& data = in->ReadBytes(0x100000);
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mbedtls_sha256(data.data(), data.size(), hash.data(), 0);
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memcpy(id.data(), hash.data(), 16);
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} else {
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id = override_id.get();
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}
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std::string path = GetRelativePathFromNcaID(id, false, true);
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if (GetFileAtID(id) != nullptr) {
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LOG_WARNING(Loader, "OW Attempt");
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return false;
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}
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auto out = dir->CreateFileRelative(path);
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if (out == nullptr)
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return false;
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return VfsRawCopy(in, out);
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}
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bool RegisteredCache::RawInstallYuzuMeta(const CNMT& cnmt) {
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const auto dir = this->dir->CreateDirectoryRelative("yuzu_meta");
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const auto filename = GetCNMTName(cnmt.GetType(), cnmt.GetTitleID());
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if (dir->GetFile(filename) == nullptr) {
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auto out = dir->CreateFile(filename);
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const auto buffer = cnmt.Serialize();
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out->Resize(buffer.size());
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out->WriteBytes(buffer);
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} else {
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auto out = dir->GetFile(filename);
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CNMT old_cnmt(out);
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// Returns true on change
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if (old_cnmt.UnionRecords(cnmt)) {
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out->Resize(0);
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const auto buffer = old_cnmt.Serialize();
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out->Resize(buffer.size());
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out->WriteBytes(buffer);
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}
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}
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Refresh();
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return std::find_if(yuzu_meta.begin(), yuzu_meta.end(),
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[&cnmt](const std::pair<const u64, CNMT>& kv) {
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return kv.second.GetType() == cnmt.GetType() &&
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kv.second.GetTitleID() == cnmt.GetTitleID();
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}) != yuzu_meta.end();
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}
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} // namespace FileSys
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108
src/core/file_sys/registered_cache.h
Normal file
108
src/core/file_sys/registered_cache.h
Normal file
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// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <map>
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#include <memory>
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#include <string>
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#include <boost/container/flat_map.hpp>
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#include "common/common_funcs.h"
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#include "content_archive.h"
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#include "core/file_sys/vfs.h"
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#include "nca_metadata.h"
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namespace FileSys {
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class XCI;
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class CNMT;
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using NcaID = std::array<u8, 0x10>;
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using RegisteredCacheParsingFunction = std::function<VirtualFile(const VirtualFile&, const NcaID&)>;
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struct RegisteredCacheEntry {
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u64 title_id;
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ContentRecordType type;
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std::string DebugInfo() const;
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};
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// boost flat_map requires operator< for O(log(n)) lookups.
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bool operator<(const RegisteredCacheEntry& lhs, const RegisteredCacheEntry& rhs);
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/*
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* A class that catalogues NCAs in the registered directory structure.
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* Nintendo's registered format follows this structure:
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*
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* Root
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* | 000000XX <- XX is the ____ two digits of the NcaID
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* | <hash>.nca <- hash is the NcaID (first half of SHA256 over entire file) (folder)
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* | 00
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* | 01 <- Actual content split along 4GB boundaries. (optional)
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*
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* (This impl also supports substituting the nca dir for an nca file, as that's more convenient when
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* 4GB splitting can be ignored.)
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*/
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class RegisteredCache {
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public:
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// Parsing function defines the conversion from raw file to NCA. If there are other steps
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// besides creating the NCA from the file (e.g. NAX0 on SD Card), that should go in a custom
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// parsing function.
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RegisteredCache(VirtualDir dir,
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RegisteredCacheParsingFunction parsing_function =
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[](const VirtualFile& file, const NcaID& id) { return file; });
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void Refresh();
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bool HasEntry(u64 title_id, ContentRecordType type) const;
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bool HasEntry(RegisteredCacheEntry entry) const;
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VirtualFile GetEntryRaw(u64 title_id, ContentRecordType type) const;
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VirtualFile GetEntryRaw(RegisteredCacheEntry entry) const;
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std::shared_ptr<NCA> GetEntry(u64 title_id, ContentRecordType type) const;
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std::shared_ptr<NCA> GetEntry(RegisteredCacheEntry entry) const;
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std::vector<RegisteredCacheEntry> ListEntries() const;
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// If a parameter is not boost::none, it will be filtered for from all entries.
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std::vector<RegisteredCacheEntry> ListEntriesFilter(
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boost::optional<TitleType> title_type = boost::none,
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boost::optional<ContentRecordType> record_type = boost::none,
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boost::optional<u64> title_id = boost::none) const;
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// Raw copies all the ncas from the xci to the csache. Does some quick checks to make sure there
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// is a meta NCA and all of them are accessible.
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bool InstallEntry(std::shared_ptr<XCI> xci);
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// Due to the fact that we must use Meta-type NCAs to determine the existance of files, this
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// poses quite a challenge. Instead of creating a new meta NCA for this file, yuzu will create a
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// dir inside the NAND called 'yuzu_meta' and store the raw CNMT there.
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// TODO(DarkLordZach): Author real meta-type NCAs and install those.
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bool InstallEntry(std::shared_ptr<NCA> nca, TitleType type);
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private:
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template <typename T>
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void IterateAllMetadata(std::vector<T>& out,
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std::function<T(const CNMT&, const ContentRecord&)> proc,
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std::function<bool(const CNMT&, const ContentRecord&)> filter) const;
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void AccumulateFiles(std::vector<NcaID>& ids) const;
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void ProcessFiles(const std::vector<NcaID>& ids);
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void AccumulateYuzuMeta();
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boost::optional<NcaID> GetNcaIDFromMetadata(u64 title_id, ContentRecordType type) const;
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VirtualFile GetFileAtID(NcaID id) const;
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VirtualFile OpenFileOrDirectoryConcat(const VirtualDir& dir, std::string_view path) const;
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bool RawInstallNCA(std::shared_ptr<NCA> nca, boost::optional<NcaID> override_id = boost::none);
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bool RawInstallYuzuMeta(const CNMT& cnmt);
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VirtualDir dir;
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RegisteredCacheParsingFunction parser;
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// maps tid -> NcaID of meta
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boost::container::flat_map<u64, NcaID> meta_id;
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// maps tid -> meta
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boost::container::flat_map<u64, CNMT> meta;
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// maps tid -> meta for CNMT in yuzu_meta
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boost::container::flat_map<u64, CNMT> yuzu_meta;
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};
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} // namespace FileSys
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