Loader/NCCH: Add support for loading application updates (#2927)
* loader/ncch: split NCCH parsing into its own file * loader/ncch: add support for loading update NCCHs from the SD card * loader/ncch: fix formatting * file_sys/ncch_container: Return a value for OpenFile * loader/ncch: cleanup, always instantiate overlay_ncch to base_ncch * file_sys/ncch_container: better encryption checks, allow non-app NCCHs to load properly and for the existence of NCCH structures to be checked * file_sys/ncch_container: pass filepath as a const reference
This commit is contained in:
Max Thomas
B3n30
parent
d673d508dd
commit
c91ccbd0ba
8 changed files with 670 additions and 439 deletions
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@ -102,8 +102,7 @@ public:
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switch (static_cast<SelfNCCHFilePathType>(file_path.type)) {
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case SelfNCCHFilePathType::UpdateRomFS:
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LOG_WARNING(Service_FS, "(STUBBED) open update RomFS");
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return OpenRomFS();
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return OpenUpdateRomFS();
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case SelfNCCHFilePathType::RomFS:
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return OpenRomFS();
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@ -179,6 +178,17 @@ private:
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}
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}
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ResultVal<std::unique_ptr<FileBackend>> OpenUpdateRomFS() const {
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if (ncch_data.update_romfs_file) {
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return MakeResult<std::unique_ptr<FileBackend>>(std::make_unique<IVFCFile>(
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ncch_data.update_romfs_file, ncch_data.update_romfs_offset,
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ncch_data.update_romfs_size));
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} else {
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LOG_INFO(Service_FS, "Unable to read update RomFS");
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return ERROR_ROMFS_NOT_FOUND;
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}
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}
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ResultVal<std::unique_ptr<FileBackend>> OpenExeFS(const std::string& filename) const {
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if (filename == "icon") {
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if (ncch_data.icon) {
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@ -218,11 +228,19 @@ private:
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};
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ArchiveFactory_SelfNCCH::ArchiveFactory_SelfNCCH(Loader::AppLoader& app_loader) {
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std::shared_ptr<FileUtil::IOFile> romfs_file_;
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std::shared_ptr<FileUtil::IOFile> romfs_file;
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if (Loader::ResultStatus::Success ==
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app_loader.ReadRomFS(romfs_file_, ncch_data.romfs_offset, ncch_data.romfs_size)) {
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app_loader.ReadRomFS(romfs_file, ncch_data.romfs_offset, ncch_data.romfs_size)) {
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ncch_data.romfs_file = std::move(romfs_file_);
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ncch_data.romfs_file = std::move(romfs_file);
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}
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std::shared_ptr<FileUtil::IOFile> update_romfs_file;
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if (Loader::ResultStatus::Success ==
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app_loader.ReadUpdateRomFS(update_romfs_file, ncch_data.update_romfs_offset,
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ncch_data.update_romfs_size)) {
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ncch_data.update_romfs_file = std::move(update_romfs_file);
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}
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std::vector<u8> buffer;
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@ -24,6 +24,10 @@ struct NCCHData {
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std::shared_ptr<FileUtil::IOFile> romfs_file;
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u64 romfs_offset = 0;
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u64 romfs_size = 0;
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std::shared_ptr<FileUtil::IOFile> update_romfs_file;
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u64 update_romfs_offset = 0;
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u64 update_romfs_size = 0;
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};
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/// File system interface to the SelfNCCH archive
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316
src/core/file_sys/ncch_container.cpp
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316
src/core/file_sys/ncch_container.cpp
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@ -0,0 +1,316 @@
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// Copyright 2017 Citra Emulator Project
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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 <cinttypes>
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#include <cstring>
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#include <memory>
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "core/core.h"
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#include "core/file_sys/ncch_container.h"
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#include "core/loader/loader.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// FileSys namespace
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namespace FileSys {
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static const int kMaxSections = 8; ///< Maximum number of sections (files) in an ExeFs
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static const int kBlockSize = 0x200; ///< Size of ExeFS blocks (in bytes)
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/**
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* Get the decompressed size of an LZSS compressed ExeFS file
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* @param buffer Buffer of compressed file
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* @param size Size of compressed buffer
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* @return Size of decompressed buffer
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*/
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static u32 LZSS_GetDecompressedSize(const u8* buffer, u32 size) {
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u32 offset_size = *(u32*)(buffer + size - 4);
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return offset_size + size;
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}
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/**
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* Decompress ExeFS file (compressed with LZSS)
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* @param compressed Compressed buffer
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* @param compressed_size Size of compressed buffer
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* @param decompressed Decompressed buffer
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* @param decompressed_size Size of decompressed buffer
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* @return True on success, otherwise false
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*/
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static bool LZSS_Decompress(const u8* compressed, u32 compressed_size, u8* decompressed,
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u32 decompressed_size) {
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const u8* footer = compressed + compressed_size - 8;
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u32 buffer_top_and_bottom = *reinterpret_cast<const u32*>(footer);
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u32 out = decompressed_size;
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u32 index = compressed_size - ((buffer_top_and_bottom >> 24) & 0xFF);
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u32 stop_index = compressed_size - (buffer_top_and_bottom & 0xFFFFFF);
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memset(decompressed, 0, decompressed_size);
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memcpy(decompressed, compressed, compressed_size);
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while (index > stop_index) {
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u8 control = compressed[--index];
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for (unsigned i = 0; i < 8; i++) {
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if (index <= stop_index)
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break;
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if (index <= 0)
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break;
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if (out <= 0)
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break;
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if (control & 0x80) {
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// Check if compression is out of bounds
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if (index < 2)
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return false;
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index -= 2;
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u32 segment_offset = compressed[index] | (compressed[index + 1] << 8);
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u32 segment_size = ((segment_offset >> 12) & 15) + 3;
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segment_offset &= 0x0FFF;
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segment_offset += 2;
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// Check if compression is out of bounds
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if (out < segment_size)
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return false;
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for (unsigned j = 0; j < segment_size; j++) {
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// Check if compression is out of bounds
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if (out + segment_offset >= decompressed_size)
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return false;
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u8 data = decompressed[out + segment_offset];
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decompressed[--out] = data;
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}
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} else {
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// Check if compression is out of bounds
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if (out < 1)
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return false;
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decompressed[--out] = compressed[--index];
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}
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control <<= 1;
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}
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}
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return true;
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}
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NCCHContainer::NCCHContainer(const std::string& filepath) : filepath(filepath) {
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file = FileUtil::IOFile(filepath, "rb");
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}
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Loader::ResultStatus NCCHContainer::OpenFile(const std::string& filepath) {
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this->filepath = filepath;
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file = FileUtil::IOFile(filepath, "rb");
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if (!file.IsOpen()) {
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LOG_WARNING(Service_FS, "Failed to open %s", filepath.c_str());
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return Loader::ResultStatus::Error;
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}
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LOG_DEBUG(Service_FS, "Opened %s", filepath.c_str());
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return Loader::ResultStatus::Success;
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}
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Loader::ResultStatus NCCHContainer::Load() {
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if (is_loaded)
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return Loader::ResultStatus::Success;
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// Reset read pointer in case this file has been read before.
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file.Seek(0, SEEK_SET);
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if (file.ReadBytes(&ncch_header, sizeof(NCCH_Header)) != sizeof(NCCH_Header))
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return Loader::ResultStatus::Error;
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// Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)...
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if (Loader::MakeMagic('N', 'C', 'S', 'D') == ncch_header.magic) {
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LOG_DEBUG(Service_FS, "Only loading the first (bootable) NCCH within the NCSD file!");
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ncch_offset = 0x4000;
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file.Seek(ncch_offset, SEEK_SET);
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file.ReadBytes(&ncch_header, sizeof(NCCH_Header));
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}
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// Verify we are loading the correct file type...
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if (Loader::MakeMagic('N', 'C', 'C', 'H') != ncch_header.magic)
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return Loader::ResultStatus::ErrorInvalidFormat;
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// System archives and DLC don't have an extended header but have RomFS
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if (ncch_header.extended_header_size) {
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if (file.ReadBytes(&exheader_header, sizeof(ExHeader_Header)) != sizeof(ExHeader_Header))
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return Loader::ResultStatus::Error;
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is_compressed = (exheader_header.codeset_info.flags.flag & 1) == 1;
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u32 entry_point = exheader_header.codeset_info.text.address;
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u32 code_size = exheader_header.codeset_info.text.code_size;
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u32 stack_size = exheader_header.codeset_info.stack_size;
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u32 bss_size = exheader_header.codeset_info.bss_size;
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u32 core_version = exheader_header.arm11_system_local_caps.core_version;
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u8 priority = exheader_header.arm11_system_local_caps.priority;
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u8 resource_limit_category =
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exheader_header.arm11_system_local_caps.resource_limit_category;
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LOG_DEBUG(Service_FS, "Name: %s", exheader_header.codeset_info.name);
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LOG_DEBUG(Service_FS, "Program ID: %016" PRIX64, ncch_header.program_id);
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LOG_DEBUG(Service_FS, "Code compressed: %s", is_compressed ? "yes" : "no");
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LOG_DEBUG(Service_FS, "Entry point: 0x%08X", entry_point);
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LOG_DEBUG(Service_FS, "Code size: 0x%08X", code_size);
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LOG_DEBUG(Service_FS, "Stack size: 0x%08X", stack_size);
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LOG_DEBUG(Service_FS, "Bss size: 0x%08X", bss_size);
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LOG_DEBUG(Service_FS, "Core version: %d", core_version);
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LOG_DEBUG(Service_FS, "Thread priority: 0x%X", priority);
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LOG_DEBUG(Service_FS, "Resource limit category: %d", resource_limit_category);
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LOG_DEBUG(Service_FS, "System Mode: %d",
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static_cast<int>(exheader_header.arm11_system_local_caps.system_mode));
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if (exheader_header.system_info.jump_id != ncch_header.program_id) {
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LOG_ERROR(Service_FS, "ExHeader Program ID mismatch: the ROM is probably encrypted.");
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return Loader::ResultStatus::ErrorEncrypted;
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}
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has_exheader = true;
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}
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// DLC can have an ExeFS and a RomFS but no extended header
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if (ncch_header.exefs_size) {
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exefs_offset = ncch_header.exefs_offset * kBlockSize;
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u32 exefs_size = ncch_header.exefs_size * kBlockSize;
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LOG_DEBUG(Service_FS, "ExeFS offset: 0x%08X", exefs_offset);
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LOG_DEBUG(Service_FS, "ExeFS size: 0x%08X", exefs_size);
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file.Seek(exefs_offset + ncch_offset, SEEK_SET);
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if (file.ReadBytes(&exefs_header, sizeof(ExeFs_Header)) != sizeof(ExeFs_Header))
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return Loader::ResultStatus::Error;
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has_exefs = true;
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}
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if (ncch_header.romfs_offset != 0 && ncch_header.romfs_size != 0)
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has_romfs = true;
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is_loaded = true;
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return Loader::ResultStatus::Success;
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}
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Loader::ResultStatus NCCHContainer::LoadSectionExeFS(const char* name, std::vector<u8>& buffer) {
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if (!file.IsOpen())
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return Loader::ResultStatus::Error;
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Loader::ResultStatus result = Load();
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if (result != Loader::ResultStatus::Success)
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return result;
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if (!has_exefs)
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return Loader::ResultStatus::ErrorNotUsed;
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LOG_DEBUG(Service_FS, "%d sections:", kMaxSections);
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// Iterate through the ExeFs archive until we find a section with the specified name...
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for (unsigned section_number = 0; section_number < kMaxSections; section_number++) {
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const auto& section = exefs_header.section[section_number];
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// Load the specified section...
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if (strcmp(section.name, name) == 0) {
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LOG_DEBUG(Service_FS, "%d - offset: 0x%08X, size: 0x%08X, name: %s", section_number,
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section.offset, section.size, section.name);
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s64 section_offset =
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(section.offset + exefs_offset + sizeof(ExeFs_Header) + ncch_offset);
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file.Seek(section_offset, SEEK_SET);
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if (strcmp(section.name, ".code") == 0 && is_compressed) {
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// Section is compressed, read compressed .code section...
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std::unique_ptr<u8[]> temp_buffer;
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try {
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temp_buffer.reset(new u8[section.size]);
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} catch (std::bad_alloc&) {
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return Loader::ResultStatus::ErrorMemoryAllocationFailed;
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}
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if (file.ReadBytes(&temp_buffer[0], section.size) != section.size)
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return Loader::ResultStatus::Error;
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// Decompress .code section...
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u32 decompressed_size = LZSS_GetDecompressedSize(&temp_buffer[0], section.size);
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buffer.resize(decompressed_size);
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if (!LZSS_Decompress(&temp_buffer[0], section.size, &buffer[0], decompressed_size))
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return Loader::ResultStatus::ErrorInvalidFormat;
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} else {
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// Section is uncompressed...
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buffer.resize(section.size);
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if (file.ReadBytes(&buffer[0], section.size) != section.size)
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return Loader::ResultStatus::Error;
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}
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return Loader::ResultStatus::Success;
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}
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}
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return Loader::ResultStatus::ErrorNotUsed;
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}
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Loader::ResultStatus NCCHContainer::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file,
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u64& offset, u64& size) {
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if (!file.IsOpen())
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return Loader::ResultStatus::Error;
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Loader::ResultStatus result = Load();
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if (result != Loader::ResultStatus::Success)
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return result;
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if (!has_romfs) {
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LOG_DEBUG(Service_FS, "RomFS requested from NCCH which has no RomFS");
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return Loader::ResultStatus::ErrorNotUsed;
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}
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u32 romfs_offset = ncch_offset + (ncch_header.romfs_offset * kBlockSize) + 0x1000;
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u32 romfs_size = (ncch_header.romfs_size * kBlockSize) - 0x1000;
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LOG_DEBUG(Service_FS, "RomFS offset: 0x%08X", romfs_offset);
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LOG_DEBUG(Service_FS, "RomFS size: 0x%08X", romfs_size);
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if (file.GetSize() < romfs_offset + romfs_size)
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return Loader::ResultStatus::Error;
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// We reopen the file, to allow its position to be independent from file's
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romfs_file = std::make_shared<FileUtil::IOFile>(filepath, "rb");
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if (!romfs_file->IsOpen())
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return Loader::ResultStatus::Error;
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offset = romfs_offset;
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size = romfs_size;
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return Loader::ResultStatus::Success;
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}
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Loader::ResultStatus NCCHContainer::ReadProgramId(u64_le& program_id) {
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Loader::ResultStatus result = Load();
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if (result != Loader::ResultStatus::Success)
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return result;
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program_id = ncch_header.program_id;
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return Loader::ResultStatus::Success;
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}
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bool NCCHContainer::HasExeFS() {
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Loader::ResultStatus result = Load();
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if (result != Loader::ResultStatus::Success)
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return false;
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return has_exefs;
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}
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bool NCCHContainer::HasRomFS() {
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Loader::ResultStatus result = Load();
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if (result != Loader::ResultStatus::Success)
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return false;
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return has_romfs;
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}
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bool NCCHContainer::HasExHeader() {
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Loader::ResultStatus result = Load();
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if (result != Loader::ResultStatus::Success)
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return false;
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return has_exheader;
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}
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} // namespace FileSys
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244
src/core/file_sys/ncch_container.h
Normal file
244
src/core/file_sys/ncch_container.h
Normal file
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@ -0,0 +1,244 @@
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// Copyright 2017 Citra Emulator Project
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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 <cstddef>
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#include <memory>
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#include <string>
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#include <vector>
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#include "common/bit_field.h"
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#include "common/common_types.h"
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#include "common/file_util.h"
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#include "common/swap.h"
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#include "core/core.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// NCCH header (Note: "NCCH" appears to be a publicly unknown acronym)
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struct NCCH_Header {
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u8 signature[0x100];
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u32_le magic;
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u32_le content_size;
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u8 partition_id[8];
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u16_le maker_code;
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u16_le version;
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u8 reserved_0[4];
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u64_le program_id;
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u8 reserved_1[0x10];
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u8 logo_region_hash[0x20];
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u8 product_code[0x10];
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u8 extended_header_hash[0x20];
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u32_le extended_header_size;
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u8 reserved_2[4];
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u8 flags[8];
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u32_le plain_region_offset;
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u32_le plain_region_size;
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u32_le logo_region_offset;
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u32_le logo_region_size;
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u32_le exefs_offset;
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u32_le exefs_size;
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u32_le exefs_hash_region_size;
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u8 reserved_3[4];
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u32_le romfs_offset;
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u32_le romfs_size;
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u32_le romfs_hash_region_size;
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u8 reserved_4[4];
|
||||
u8 exefs_super_block_hash[0x20];
|
||||
u8 romfs_super_block_hash[0x20];
|
||||
};
|
||||
|
||||
static_assert(sizeof(NCCH_Header) == 0x200, "NCCH header structure size is wrong");
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////////////////
|
||||
// ExeFS (executable file system) headers
|
||||
|
||||
struct ExeFs_SectionHeader {
|
||||
char name[8];
|
||||
u32 offset;
|
||||
u32 size;
|
||||
};
|
||||
|
||||
struct ExeFs_Header {
|
||||
ExeFs_SectionHeader section[8];
|
||||
u8 reserved[0x80];
|
||||
u8 hashes[8][0x20];
|
||||
};
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////////////////
|
||||
// ExHeader (executable file system header) headers
|
||||
|
||||
struct ExHeader_SystemInfoFlags {
|
||||
u8 reserved[5];
|
||||
u8 flag;
|
||||
u8 remaster_version[2];
|
||||
};
|
||||
|
||||
struct ExHeader_CodeSegmentInfo {
|
||||
u32 address;
|
||||
u32 num_max_pages;
|
||||
u32 code_size;
|
||||
};
|
||||
|
||||
struct ExHeader_CodeSetInfo {
|
||||
u8 name[8];
|
||||
ExHeader_SystemInfoFlags flags;
|
||||
ExHeader_CodeSegmentInfo text;
|
||||
u32 stack_size;
|
||||
ExHeader_CodeSegmentInfo ro;
|
||||
u8 reserved[4];
|
||||
ExHeader_CodeSegmentInfo data;
|
||||
u32 bss_size;
|
||||
};
|
||||
|
||||
struct ExHeader_DependencyList {
|
||||
u8 program_id[0x30][8];
|
||||
};
|
||||
|
||||
struct ExHeader_SystemInfo {
|
||||
u64 save_data_size;
|
||||
u64_le jump_id;
|
||||
u8 reserved_2[0x30];
|
||||
};
|
||||
|
||||
struct ExHeader_StorageInfo {
|
||||
u8 ext_save_data_id[8];
|
||||
u8 system_save_data_id[8];
|
||||
u8 reserved[8];
|
||||
u8 access_info[7];
|
||||
u8 other_attributes;
|
||||
};
|
||||
|
||||
struct ExHeader_ARM11_SystemLocalCaps {
|
||||
u64_le program_id;
|
||||
u32_le core_version;
|
||||
u8 reserved_flags[2];
|
||||
union {
|
||||
u8 flags0;
|
||||
BitField<0, 2, u8> ideal_processor;
|
||||
BitField<2, 2, u8> affinity_mask;
|
||||
BitField<4, 4, u8> system_mode;
|
||||
};
|
||||
u8 priority;
|
||||
u8 resource_limit_descriptor[0x10][2];
|
||||
ExHeader_StorageInfo storage_info;
|
||||
u8 service_access_control[0x20][8];
|
||||
u8 ex_service_access_control[0x2][8];
|
||||
u8 reserved[0xf];
|
||||
u8 resource_limit_category;
|
||||
};
|
||||
|
||||
struct ExHeader_ARM11_KernelCaps {
|
||||
u32_le descriptors[28];
|
||||
u8 reserved[0x10];
|
||||
};
|
||||
|
||||
struct ExHeader_ARM9_AccessControl {
|
||||
u8 descriptors[15];
|
||||
u8 descversion;
|
||||
};
|
||||
|
||||
struct ExHeader_Header {
|
||||
ExHeader_CodeSetInfo codeset_info;
|
||||
ExHeader_DependencyList dependency_list;
|
||||
ExHeader_SystemInfo system_info;
|
||||
ExHeader_ARM11_SystemLocalCaps arm11_system_local_caps;
|
||||
ExHeader_ARM11_KernelCaps arm11_kernel_caps;
|
||||
ExHeader_ARM9_AccessControl arm9_access_control;
|
||||
struct {
|
||||
u8 signature[0x100];
|
||||
u8 ncch_public_key_modulus[0x100];
|
||||
ExHeader_ARM11_SystemLocalCaps arm11_system_local_caps;
|
||||
ExHeader_ARM11_KernelCaps arm11_kernel_caps;
|
||||
ExHeader_ARM9_AccessControl arm9_access_control;
|
||||
} access_desc;
|
||||
};
|
||||
|
||||
static_assert(sizeof(ExHeader_Header) == 0x800, "ExHeader structure size is wrong");
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////////////////
|
||||
// FileSys namespace
|
||||
|
||||
namespace FileSys {
|
||||
|
||||
/**
|
||||
* Helper which implements an interface to deal with NCCH containers which can
|
||||
* contain ExeFS archives or RomFS archives for games or other applications.
|
||||
*/
|
||||
class NCCHContainer {
|
||||
public:
|
||||
NCCHContainer(const std::string& filepath);
|
||||
NCCHContainer() {}
|
||||
|
||||
Loader::ResultStatus OpenFile(const std::string& filepath);
|
||||
|
||||
/**
|
||||
* Ensure ExeFS and exheader is loaded and ready for reading sections
|
||||
* @return ResultStatus result of function
|
||||
*/
|
||||
Loader::ResultStatus Load();
|
||||
|
||||
/**
|
||||
* Reads an application ExeFS section of an NCCH file (e.g. .code, .logo, etc.)
|
||||
* @param name Name of section to read out of NCCH file
|
||||
* @param buffer Vector to read data into
|
||||
* @return ResultStatus result of function
|
||||
*/
|
||||
Loader::ResultStatus LoadSectionExeFS(const char* name, std::vector<u8>& buffer);
|
||||
|
||||
/**
|
||||
* Get the RomFS of the NCCH container
|
||||
* Since the RomFS can be huge, we return a file reference instead of copying to a buffer
|
||||
* @param romfs_file The file containing the RomFS
|
||||
* @param offset The offset the romfs begins on
|
||||
* @param size The size of the romfs
|
||||
* @return ResultStatus result of function
|
||||
*/
|
||||
Loader::ResultStatus ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, u64& offset,
|
||||
u64& size);
|
||||
|
||||
/**
|
||||
* Get the Program ID of the NCCH container
|
||||
* @return ResultStatus result of function
|
||||
*/
|
||||
Loader::ResultStatus ReadProgramId(u64_le& program_id);
|
||||
|
||||
/**
|
||||
* Checks whether the NCCH container contains an ExeFS
|
||||
* @return bool check result
|
||||
*/
|
||||
bool HasExeFS();
|
||||
|
||||
/**
|
||||
* Checks whether the NCCH container contains a RomFS
|
||||
* @return bool check result
|
||||
*/
|
||||
bool HasRomFS();
|
||||
|
||||
/**
|
||||
* Checks whether the NCCH container contains an ExHeader
|
||||
* @return bool check result
|
||||
*/
|
||||
bool HasExHeader();
|
||||
|
||||
NCCH_Header ncch_header;
|
||||
ExeFs_Header exefs_header;
|
||||
ExHeader_Header exheader_header;
|
||||
|
||||
private:
|
||||
bool has_exheader = false;
|
||||
bool has_exefs = false;
|
||||
bool has_romfs = false;
|
||||
|
||||
bool is_loaded = false;
|
||||
bool is_compressed = false;
|
||||
|
||||
u32 ncch_offset = 0; // Offset to NCCH header, can be 0 or after NCSD header
|
||||
u32 exefs_offset = 0;
|
||||
|
||||
std::string filepath;
|
||||
FileUtil::IOFile file;
|
||||
};
|
||||
|
||||
} // namespace FileSys
|
||||
Loading…
Add table
Add a link
Reference in a new issue