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citra/src/core/file_sys/ncch_container.cpp

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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cinttypes>
#include <cstring>
#include <memory>
#include <cryptopp/aes.h>
#include <cryptopp/modes.h>
#include <cryptopp/sha.h>
#include "common/common_types.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/file_sys/ncch_container.h"
#include "core/file_sys/seed_db.h"
#include "core/hw/aes/key.h"
#include "core/loader/loader.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// FileSys namespace
namespace FileSys {
static const int kMaxSections = 8; ///< Maximum number of sections (files) in an ExeFs
static const int kBlockSize = 0x200; ///< Size of ExeFS blocks (in bytes)
/**
* Attempts to patch a buffer using an IPS
* @param ips Vector of the patches to apply
* @param buffer Vector to patch data into
*/
static void ApplyIPS(std::vector<u8>& ips, std::vector<u8>& buffer) {
u32 cursor = 5;
u32 patch_length = ips.size() - 3;
std::string ips_header(ips.begin(), ips.begin() + 5);
if (ips_header != "PATCH") {
LOG_INFO(Service_FS, "Attempted to load invalid IPS");
return;
}
while (cursor < patch_length) {
std::string eof_check(ips.begin() + cursor, ips.begin() + cursor + 3);
if (eof_check == "EOF")
return;
u32 offset = ips[cursor] << 16 | ips[cursor + 1] << 8 | ips[cursor + 2];
std::size_t length = ips[cursor + 3] << 8 | ips[cursor + 4];
// check for an rle record
if (length == 0) {
length = ips[cursor + 5] << 8 | ips[cursor + 6];
if (buffer.size() < offset + length)
return;
for (u32 i = 0; i < length; ++i)
buffer[offset + i] = ips[cursor + 7];
cursor += 8;
continue;
}
if (buffer.size() < offset + length)
return;
std::memcpy(&buffer[offset], &ips[cursor + 5], length);
cursor += length + 5;
}
}
/**
* Get the decompressed size of an LZSS compressed ExeFS file
* @param buffer Buffer of compressed file
* @param size Size of compressed buffer
* @return Size of decompressed buffer
*/
static u32 LZSS_GetDecompressedSize(const u8* buffer, u32 size) {
u32 offset_size;
std::memcpy(&offset_size, buffer + size - sizeof(u32), sizeof(u32));
return offset_size + size;
}
/**
* Decompress ExeFS file (compressed with LZSS)
* @param compressed Compressed buffer
* @param compressed_size Size of compressed buffer
* @param decompressed Decompressed buffer
* @param decompressed_size Size of decompressed buffer
* @return True on success, otherwise false
*/
static bool LZSS_Decompress(const u8* compressed, u32 compressed_size, u8* decompressed,
u32 decompressed_size) {
const u8* footer = compressed + compressed_size - 8;
u32 buffer_top_and_bottom;
std::memcpy(&buffer_top_and_bottom, footer, sizeof(u32));
u32 out = decompressed_size;
u32 index = compressed_size - ((buffer_top_and_bottom >> 24) & 0xFF);
u32 stop_index = compressed_size - (buffer_top_and_bottom & 0xFFFFFF);
memset(decompressed, 0, decompressed_size);
memcpy(decompressed, compressed, compressed_size);
while (index > stop_index) {
u8 control = compressed[--index];
for (unsigned i = 0; i < 8; i++) {
if (index <= stop_index)
break;
if (index <= 0)
break;
if (out <= 0)
break;
if (control & 0x80) {
// Check if compression is out of bounds
if (index < 2)
return false;
index -= 2;
u32 segment_offset = compressed[index] | (compressed[index + 1] << 8);
u32 segment_size = ((segment_offset >> 12) & 15) + 3;
segment_offset &= 0x0FFF;
segment_offset += 2;
// Check if compression is out of bounds
if (out < segment_size)
return false;
for (unsigned j = 0; j < segment_size; j++) {
// Check if compression is out of bounds
if (out + segment_offset >= decompressed_size)
return false;
u8 data = decompressed[out + segment_offset];
decompressed[--out] = data;
}
} else {
// Check if compression is out of bounds
if (out < 1)
return false;
decompressed[--out] = compressed[--index];
}
control <<= 1;
}
}
return true;
}
NCCHContainer::NCCHContainer(const std::string& filepath, u32 ncch_offset)
: ncch_offset(ncch_offset), filepath(filepath) {
file = FileUtil::IOFile(filepath, "rb");
}
Loader::ResultStatus NCCHContainer::OpenFile(const std::string& filepath, u32 ncch_offset) {
this->filepath = filepath;
this->ncch_offset = ncch_offset;
file = FileUtil::IOFile(filepath, "rb");
if (!file.IsOpen()) {
LOG_WARNING(Service_FS, "Failed to open {}", filepath);
return Loader::ResultStatus::Error;
}
LOG_DEBUG(Service_FS, "Opened {}", filepath);
return Loader::ResultStatus::Success;
}
Loader::ResultStatus NCCHContainer::Load() {
LOG_INFO(Service_FS, "Loading NCCH from file {}", filepath);
if (is_loaded)
return Loader::ResultStatus::Success;
if (file.IsOpen()) {
// Reset read pointer in case this file has been read before.
file.Seek(ncch_offset, SEEK_SET);
if (file.ReadBytes(&ncch_header, sizeof(NCCH_Header)) != sizeof(NCCH_Header))
return Loader::ResultStatus::Error;
// Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)...
if (Loader::MakeMagic('N', 'C', 'S', 'D') == ncch_header.magic) {
LOG_DEBUG(Service_FS, "Only loading the first (bootable) NCCH within the NCSD file!");
ncch_offset += 0x4000;
file.Seek(ncch_offset, SEEK_SET);
file.ReadBytes(&ncch_header, sizeof(NCCH_Header));
}
// Verify we are loading the correct file type...
if (Loader::MakeMagic('N', 'C', 'C', 'H') != ncch_header.magic)
return Loader::ResultStatus::ErrorInvalidFormat;
has_header = true;
bool failed_to_decrypt = false;
if (!ncch_header.no_crypto) {
is_encrypted = true;
// Find primary and secondary keys
if (ncch_header.fixed_key) {
LOG_DEBUG(Service_FS, "Fixed-key crypto");
primary_key.fill(0);
secondary_key.fill(0);
} else {
using namespace HW::AES;
InitKeys();
std::array<u8, 16> key_y_primary, key_y_secondary;
std::copy(ncch_header.signature, ncch_header.signature + key_y_primary.size(),
key_y_primary.begin());
if (!ncch_header.seed_crypto) {
key_y_secondary = key_y_primary;
} else {
auto opt{FileSys::GetSeed(ncch_header.program_id)};
if (!opt.has_value()) {
LOG_ERROR(Service_FS, "Seed for program {:016X} not found",
ncch_header.program_id);
failed_to_decrypt = true;
} else {
auto seed{*opt};
std::array<u8, 32> input;
std::memcpy(input.data(), key_y_primary.data(), key_y_primary.size());
std::memcpy(input.data() + key_y_primary.size(), seed.data(), seed.size());
CryptoPP::SHA256 sha;
std::array<u8, CryptoPP::SHA256::DIGESTSIZE> hash;
sha.CalculateDigest(hash.data(), input.data(), input.size());
std::memcpy(key_y_secondary.data(), hash.data(), key_y_secondary.size());
}
}
SetKeyY(KeySlotID::NCCHSecure1, key_y_primary);
if (!IsNormalKeyAvailable(KeySlotID::NCCHSecure1)) {
LOG_ERROR(Service_FS, "Secure1 KeyX missing");
failed_to_decrypt = true;
}
primary_key = GetNormalKey(KeySlotID::NCCHSecure1);
switch (ncch_header.secondary_key_slot) {
case 0:
LOG_DEBUG(Service_FS, "Secure1 crypto");
secondary_key = primary_key;
break;
case 1:
LOG_DEBUG(Service_FS, "Secure2 crypto");
SetKeyY(KeySlotID::NCCHSecure2, key_y_secondary);
if (!IsNormalKeyAvailable(KeySlotID::NCCHSecure2)) {
LOG_ERROR(Service_FS, "Secure2 KeyX missing");
failed_to_decrypt = true;
}
secondary_key = GetNormalKey(KeySlotID::NCCHSecure2);
break;
case 10:
LOG_DEBUG(Service_FS, "Secure3 crypto");
SetKeyY(KeySlotID::NCCHSecure3, key_y_secondary);
if (!IsNormalKeyAvailable(KeySlotID::NCCHSecure3)) {
LOG_ERROR(Service_FS, "Secure3 KeyX missing");
failed_to_decrypt = true;
}
secondary_key = GetNormalKey(KeySlotID::NCCHSecure3);
break;
case 11:
LOG_DEBUG(Service_FS, "Secure4 crypto");
SetKeyY(KeySlotID::NCCHSecure4, key_y_secondary);
if (!IsNormalKeyAvailable(KeySlotID::NCCHSecure4)) {
LOG_ERROR(Service_FS, "Secure4 KeyX missing");
failed_to_decrypt = true;
}
secondary_key = GetNormalKey(KeySlotID::NCCHSecure4);
break;
}
}
// Find CTR for each section
// Written with reference to
// https://github.com/d0k3/GodMode9/blob/99af6a73be48fa7872649aaa7456136da0df7938/arm9/source/game/ncch.c#L34-L52
if (ncch_header.version == 0 || ncch_header.version == 2) {
LOG_DEBUG(Loader, "NCCH version 0/2");
// In this version, CTR for each section is a magic number prefixed by partition ID
// (reverse order)
std::reverse_copy(ncch_header.partition_id, ncch_header.partition_id + 8,
exheader_ctr.begin());
exefs_ctr = romfs_ctr = exheader_ctr;
exheader_ctr[8] = 1;
exefs_ctr[8] = 2;
romfs_ctr[8] = 3;
} else if (ncch_header.version == 1) {
LOG_DEBUG(Loader, "NCCH version 1");
// In this version, CTR for each section is the section offset prefixed by partition
// ID, as if the entire NCCH image is encrypted using a single CTR stream.
std::copy(ncch_header.partition_id, ncch_header.partition_id + 8,
exheader_ctr.begin());
exefs_ctr = romfs_ctr = exheader_ctr;
auto u32ToBEArray = [](u32 value) -> std::array<u8, 4> {
return std::array<u8, 4>{
static_cast<u8>(value >> 24),
static_cast<u8>((value >> 16) & 0xFF),
static_cast<u8>((value >> 8) & 0xFF),
static_cast<u8>(value & 0xFF),
};
};
auto offset_exheader = u32ToBEArray(0x200); // exheader offset
auto offset_exefs = u32ToBEArray(ncch_header.exefs_offset * kBlockSize);
auto offset_romfs = u32ToBEArray(ncch_header.romfs_offset * kBlockSize);
std::copy(offset_exheader.begin(), offset_exheader.end(),
exheader_ctr.begin() + 12);
std::copy(offset_exefs.begin(), offset_exefs.end(), exefs_ctr.begin() + 12);
std::copy(offset_romfs.begin(), offset_romfs.end(), romfs_ctr.begin() + 12);
} else {
LOG_ERROR(Service_FS, "Unknown NCCH version {}", ncch_header.version);
failed_to_decrypt = true;
}
} else {
LOG_DEBUG(Service_FS, "No crypto");
is_encrypted = false;
}
// System archives and DLC don't have an extended header but have RomFS
if (ncch_header.extended_header_size) {
if (file.ReadBytes(&exheader_header, sizeof(ExHeader_Header)) !=
sizeof(ExHeader_Header))
return Loader::ResultStatus::Error;
if (is_encrypted) {
// This ID check is masked to low 32-bit as a toleration to ill-formed ROM created
// by merging games and its updates.
if ((exheader_header.system_info.jump_id & 0xFFFFFFFF) ==
(ncch_header.program_id & 0xFFFFFFFF)) {
LOG_WARNING(Service_FS, "NCCH is marked as encrypted but with decrypted "
"exheader. Force no crypto scheme.");
is_encrypted = false;
} else {
if (failed_to_decrypt) {
LOG_ERROR(Service_FS, "Failed to decrypt");
return Loader::ResultStatus::ErrorEncrypted;
}
CryptoPP::byte* data = reinterpret_cast<CryptoPP::byte*>(&exheader_header);
CryptoPP::CTR_Mode<CryptoPP::AES>::Decryption(
primary_key.data(), primary_key.size(), exheader_ctr.data())
.ProcessData(data, data, sizeof(exheader_header));
}
}
is_compressed = (exheader_header.codeset_info.flags.flag & 1) == 1;
u32 entry_point = exheader_header.codeset_info.text.address;
u32 code_size = exheader_header.codeset_info.text.code_size;
u32 stack_size = exheader_header.codeset_info.stack_size;
u32 bss_size = exheader_header.codeset_info.bss_size;
u32 core_version = exheader_header.arm11_system_local_caps.core_version;
u8 priority = exheader_header.arm11_system_local_caps.priority;
u8 resource_limit_category =
exheader_header.arm11_system_local_caps.resource_limit_category;
LOG_DEBUG(Service_FS, "Name: {}",
exheader_header.codeset_info.name);
LOG_DEBUG(Service_FS, "Program ID: {:016X}", ncch_header.program_id);
LOG_DEBUG(Service_FS, "Code compressed: {}", is_compressed ? "yes" : "no");
LOG_DEBUG(Service_FS, "Entry point: 0x{:08X}", entry_point);
LOG_DEBUG(Service_FS, "Code size: 0x{:08X}", code_size);
LOG_DEBUG(Service_FS, "Stack size: 0x{:08X}", stack_size);
LOG_DEBUG(Service_FS, "Bss size: 0x{:08X}", bss_size);
LOG_DEBUG(Service_FS, "Core version: {}", core_version);
LOG_DEBUG(Service_FS, "Thread priority: 0x{:X}", priority);
LOG_DEBUG(Service_FS, "Resource limit category: {}", resource_limit_category);
LOG_DEBUG(Service_FS, "System Mode: {}",
static_cast<int>(exheader_header.arm11_system_local_caps.system_mode));
has_exheader = true;
}
// DLC can have an ExeFS and a RomFS but no extended header
if (ncch_header.exefs_size) {
exefs_offset = ncch_header.exefs_offset * kBlockSize;
u32 exefs_size = ncch_header.exefs_size * kBlockSize;
LOG_DEBUG(Service_FS, "ExeFS offset: 0x{:08X}", exefs_offset);
LOG_DEBUG(Service_FS, "ExeFS size: 0x{:08X}", exefs_size);
file.Seek(exefs_offset + ncch_offset, SEEK_SET);
if (file.ReadBytes(&exefs_header, sizeof(ExeFs_Header)) != sizeof(ExeFs_Header))
return Loader::ResultStatus::Error;
if (is_encrypted) {
CryptoPP::byte* data = reinterpret_cast<CryptoPP::byte*>(&exefs_header);
CryptoPP::CTR_Mode<CryptoPP::AES>::Decryption(primary_key.data(),
primary_key.size(), exefs_ctr.data())
.ProcessData(data, data, sizeof(exefs_header));
}
exefs_file = FileUtil::IOFile(filepath, "rb");
has_exefs = true;
}
if (ncch_header.romfs_offset != 0 && ncch_header.romfs_size != 0)
has_romfs = true;
}
LoadOverrides();
// We need at least one of these or overrides, practically
if (!(has_exefs || has_romfs || is_tainted))
return Loader::ResultStatus::Error;
is_loaded = true;
return Loader::ResultStatus::Success;
}
Loader::ResultStatus NCCHContainer::LoadOverrides() {
// Check for split-off files, mark the archive as tainted if we will use them
std::string romfs_override = filepath + ".romfs";
if (FileUtil::Exists(romfs_override)) {
is_tainted = true;
}
// If we have a split-off exefs file/folder, it takes priority
std::string exefs_override = filepath + ".exefs";
std::string exefsdir_override = filepath + ".exefsdir/";
if (FileUtil::Exists(exefs_override)) {
exefs_file = FileUtil::IOFile(exefs_override, "rb");
if (exefs_file.ReadBytes(&exefs_header, sizeof(ExeFs_Header)) == sizeof(ExeFs_Header)) {
LOG_DEBUG(Service_FS, "Loading ExeFS section from {}", exefs_override);
exefs_offset = 0;
is_tainted = true;
has_exefs = true;
} else {
exefs_file = FileUtil::IOFile(filepath, "rb");
}
} else if (FileUtil::Exists(exefsdir_override) && FileUtil::IsDirectory(exefsdir_override)) {
is_tainted = true;
}
if (is_tainted)
LOG_WARNING(Service_FS,
"Loaded NCCH {} is tainted, application behavior may not be as expected!",
filepath);
return Loader::ResultStatus::Success;
}
Loader::ResultStatus NCCHContainer::LoadSectionExeFS(const char* name, std::vector<u8>& buffer) {
Loader::ResultStatus result = Load();
if (result != Loader::ResultStatus::Success)
return result;
// Check if we have files that can drop-in and replace
result = LoadOverrideExeFSSection(name, buffer);
if (result == Loader::ResultStatus::Success || !has_exefs)
return result;
// As of firmware 5.0.0-11 the logo is stored between the access descriptor and the plain region
// instead of the ExeFS.
if (std::strcmp(name, "logo") == 0) {
if (ncch_header.logo_region_offset && ncch_header.logo_region_size) {
std::size_t logo_offset = ncch_header.logo_region_offset * kBlockSize;
std::size_t logo_size = ncch_header.logo_region_size * kBlockSize;
buffer.resize(logo_size);
file.Seek(ncch_offset + logo_offset, SEEK_SET);
if (file.ReadBytes(buffer.data(), logo_size) != logo_size) {
LOG_ERROR(Service_FS, "Could not read NCCH logo");
return Loader::ResultStatus::Error;
}
return Loader::ResultStatus::Success;
} else {
LOG_INFO(Service_FS, "Attempting to load logo from the ExeFS");
}
}
// If we don't have any separate files, we'll need a full ExeFS
if (!exefs_file.IsOpen())
return Loader::ResultStatus::Error;
LOG_DEBUG(Service_FS, "{} sections:", kMaxSections);
// Iterate through the ExeFs archive until we find a section with the specified name...
for (unsigned section_number = 0; section_number < kMaxSections; section_number++) {
const auto& section = exefs_header.section[section_number];
// Load the specified section...
if (strcmp(section.name, name) == 0) {
LOG_DEBUG(Service_FS, "{} - offset: 0x{:08X}, size: 0x{:08X}, name: {}", section_number,
section.offset, section.size, section.name);
s64 section_offset =
(section.offset + exefs_offset + sizeof(ExeFs_Header) + ncch_offset);
exefs_file.Seek(section_offset, SEEK_SET);
std::array<u8, 16> key;
if (strcmp(section.name, "icon") == 0 || strcmp(section.name, "banner") == 0) {
key = primary_key;
} else {
key = secondary_key;
}
CryptoPP::CTR_Mode<CryptoPP::AES>::Decryption dec(key.data(), key.size(),
exefs_ctr.data());
dec.Seek(section.offset + sizeof(ExeFs_Header));
if (strcmp(section.name, ".code") == 0 && is_compressed) {
// Section is compressed, read compressed .code section...
std::unique_ptr<u8[]> temp_buffer;
try {
temp_buffer.reset(new u8[section.size]);
} catch (std::bad_alloc&) {
return Loader::ResultStatus::ErrorMemoryAllocationFailed;
}
if (exefs_file.ReadBytes(&temp_buffer[0], section.size) != section.size)
return Loader::ResultStatus::Error;
if (is_encrypted) {
dec.ProcessData(&temp_buffer[0], &temp_buffer[0], section.size);
}
// Decompress .code section...
u32 decompressed_size = LZSS_GetDecompressedSize(&temp_buffer[0], section.size);
buffer.resize(decompressed_size);
if (!LZSS_Decompress(&temp_buffer[0], section.size, &buffer[0], decompressed_size))
return Loader::ResultStatus::ErrorInvalidFormat;
} else {
// Section is uncompressed...
buffer.resize(section.size);
if (exefs_file.ReadBytes(&buffer[0], section.size) != section.size)
return Loader::ResultStatus::Error;
if (is_encrypted) {
dec.ProcessData(&buffer[0], &buffer[0], section.size);
}
}
std::string override_ips = filepath + ".exefsdir/code.ips";
if (FileUtil::Exists(override_ips) && strcmp(name, ".code") == 0) {
FileUtil::IOFile ips_file(override_ips, "rb");
std::size_t ips_file_size = ips_file.GetSize();
std::vector<u8> ips(ips_file_size);
if (ips_file.IsOpen() &&
ips_file.ReadBytes(&ips[0], ips_file_size) == ips_file_size) {
LOG_INFO(Service_FS, "File {} patching code.bin", override_ips);
ApplyIPS(ips, buffer);
}
}
return Loader::ResultStatus::Success;
}
}
return Loader::ResultStatus::ErrorNotUsed;
}
Loader::ResultStatus NCCHContainer::LoadOverrideExeFSSection(const char* name,
std::vector<u8>& buffer) {
std::string override_name;
// Map our section name to the extracted equivalent
if (!strcmp(name, ".code"))
override_name = "code.bin";
else if (!strcmp(name, "icon"))
override_name = "code.bin";
else if (!strcmp(name, "banner"))
override_name = "banner.bnr";
else if (!strcmp(name, "logo"))
override_name = "logo.bcma.lz";
else
return Loader::ResultStatus::Error;
std::string section_override = filepath + ".exefsdir/" + override_name;
FileUtil::IOFile section_file(section_override, "rb");
if (section_file.IsOpen()) {
auto section_size = section_file.GetSize();
buffer.resize(section_size);
section_file.Seek(0, SEEK_SET);
if (section_file.ReadBytes(&buffer[0], section_size) == section_size) {
LOG_WARNING(Service_FS, "File {} overriding built-in ExeFS file", section_override);
return Loader::ResultStatus::Success;
}
}
return Loader::ResultStatus::ErrorNotUsed;
}
Loader::ResultStatus NCCHContainer::ReadRomFS(std::shared_ptr<RomFSReader>& romfs_file) {
Loader::ResultStatus result = Load();
if (result != Loader::ResultStatus::Success)
return result;
if (ReadOverrideRomFS(romfs_file) == Loader::ResultStatus::Success)
return Loader::ResultStatus::Success;
if (!has_romfs) {
LOG_DEBUG(Service_FS, "RomFS requested from NCCH which has no RomFS");
return Loader::ResultStatus::ErrorNotUsed;
}
if (!file.IsOpen())
return Loader::ResultStatus::Error;
u32 romfs_offset = ncch_offset + (ncch_header.romfs_offset * kBlockSize) + 0x1000;
u32 romfs_size = (ncch_header.romfs_size * kBlockSize) - 0x1000;
LOG_DEBUG(Service_FS, "RomFS offset: 0x{:08X}", romfs_offset);
LOG_DEBUG(Service_FS, "RomFS size: 0x{:08X}", romfs_size);
if (file.GetSize() < romfs_offset + romfs_size)
return Loader::ResultStatus::Error;
// We reopen the file, to allow its position to be independent from file's
FileUtil::IOFile romfs_file_inner(filepath, "rb");
if (!romfs_file_inner.IsOpen())
return Loader::ResultStatus::Error;
if (is_encrypted) {
romfs_file = std::make_shared<RomFSReader>(std::move(romfs_file_inner), romfs_offset,
romfs_size, secondary_key, romfs_ctr, 0x1000);
} else {
romfs_file =
std::make_shared<RomFSReader>(std::move(romfs_file_inner), romfs_offset, romfs_size);
}
return Loader::ResultStatus::Success;
}
Loader::ResultStatus NCCHContainer::ReadOverrideRomFS(std::shared_ptr<RomFSReader>& romfs_file) {
// Check for RomFS overrides
std::string split_filepath = filepath + ".romfs";
if (FileUtil::Exists(split_filepath)) {
FileUtil::IOFile romfs_file_inner(split_filepath, "rb");
if (romfs_file_inner.IsOpen()) {
LOG_WARNING(Service_FS, "File {} overriding built-in RomFS", split_filepath);
romfs_file = std::make_shared<RomFSReader>(std::move(romfs_file_inner), 0,
romfs_file_inner.GetSize());
return Loader::ResultStatus::Success;
}
}
return Loader::ResultStatus::ErrorNotUsed;
}
Loader::ResultStatus NCCHContainer::ReadProgramId(u64_le& program_id) {
Loader::ResultStatus result = Load();
if (result != Loader::ResultStatus::Success)
return result;
if (!has_header)
return Loader::ResultStatus::ErrorNotUsed;
program_id = ncch_header.program_id;
return Loader::ResultStatus::Success;
}
Loader::ResultStatus NCCHContainer::ReadExtdataId(u64& extdata_id) {
Loader::ResultStatus result = Load();
if (result != Loader::ResultStatus::Success)
return result;
if (!has_exheader)
return Loader::ResultStatus::ErrorNotUsed;
if (exheader_header.arm11_system_local_caps.storage_info.other_attributes >> 1) {
// Using extended save data access
// There would be multiple possible extdata IDs in this case. The best we can do for now is
// guessing that the first one would be the main save.
const std::array<u64, 6> extdata_ids{{
exheader_header.arm11_system_local_caps.storage_info.extdata_id0.Value(),
exheader_header.arm11_system_local_caps.storage_info.extdata_id1.Value(),
exheader_header.arm11_system_local_caps.storage_info.extdata_id2.Value(),
exheader_header.arm11_system_local_caps.storage_info.extdata_id3.Value(),
exheader_header.arm11_system_local_caps.storage_info.extdata_id4.Value(),
exheader_header.arm11_system_local_caps.storage_info.extdata_id5.Value(),
}};
for (u64 id : extdata_ids) {
if (id) {
// Found a non-zero ID, use it
extdata_id = id;
return Loader::ResultStatus::Success;
}
}
return Loader::ResultStatus::ErrorNotUsed;
}
extdata_id = exheader_header.arm11_system_local_caps.storage_info.ext_save_data_id;
return Loader::ResultStatus::Success;
}
bool NCCHContainer::HasExeFS() {
Loader::ResultStatus result = Load();
if (result != Loader::ResultStatus::Success)
return false;
return has_exefs;
}
bool NCCHContainer::HasRomFS() {
Loader::ResultStatus result = Load();
if (result != Loader::ResultStatus::Success)
return false;
return has_romfs;
}
bool NCCHContainer::HasExHeader() {
Loader::ResultStatus result = Load();
if (result != Loader::ResultStatus::Success)
return false;
return has_exheader;
}
} // namespace FileSys
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