diff options
Diffstat (limited to 'src/core/file_sys')
| -rw-r--r-- | src/core/file_sys/archive_selfncch.cpp | 28 | ||||
| -rw-r--r-- | src/core/file_sys/archive_selfncch.h | 4 | ||||
| -rw-r--r-- | src/core/file_sys/ncch_container.cpp | 316 | ||||
| -rw-r--r-- | src/core/file_sys/ncch_container.h | 244 |
4 files changed, 587 insertions, 5 deletions
diff --git a/src/core/file_sys/archive_selfncch.cpp b/src/core/file_sys/archive_selfncch.cpp index 298a37a44..7dc91a405 100644 --- a/src/core/file_sys/archive_selfncch.cpp +++ b/src/core/file_sys/archive_selfncch.cpp @@ -102,8 +102,7 @@ public: switch (static_cast<SelfNCCHFilePathType>(file_path.type)) { case SelfNCCHFilePathType::UpdateRomFS: - LOG_WARNING(Service_FS, "(STUBBED) open update RomFS"); - return OpenRomFS(); + return OpenUpdateRomFS(); case SelfNCCHFilePathType::RomFS: return OpenRomFS(); @@ -179,6 +178,17 @@ private: } } + ResultVal<std::unique_ptr<FileBackend>> OpenUpdateRomFS() const { + if (ncch_data.update_romfs_file) { + return MakeResult<std::unique_ptr<FileBackend>>(std::make_unique<IVFCFile>( + ncch_data.update_romfs_file, ncch_data.update_romfs_offset, + ncch_data.update_romfs_size)); + } else { + LOG_INFO(Service_FS, "Unable to read update RomFS"); + return ERROR_ROMFS_NOT_FOUND; + } + } + ResultVal<std::unique_ptr<FileBackend>> OpenExeFS(const std::string& filename) const { if (filename == "icon") { if (ncch_data.icon) { @@ -218,11 +228,19 @@ private: }; ArchiveFactory_SelfNCCH::ArchiveFactory_SelfNCCH(Loader::AppLoader& app_loader) { - std::shared_ptr<FileUtil::IOFile> romfs_file_; + std::shared_ptr<FileUtil::IOFile> romfs_file; + if (Loader::ResultStatus::Success == + app_loader.ReadRomFS(romfs_file, ncch_data.romfs_offset, ncch_data.romfs_size)) { + + ncch_data.romfs_file = std::move(romfs_file); + } + + std::shared_ptr<FileUtil::IOFile> update_romfs_file; if (Loader::ResultStatus::Success == - app_loader.ReadRomFS(romfs_file_, ncch_data.romfs_offset, ncch_data.romfs_size)) { + app_loader.ReadUpdateRomFS(update_romfs_file, ncch_data.update_romfs_offset, + ncch_data.update_romfs_size)) { - ncch_data.romfs_file = std::move(romfs_file_); + ncch_data.update_romfs_file = std::move(update_romfs_file); } std::vector<u8> buffer; diff --git a/src/core/file_sys/archive_selfncch.h b/src/core/file_sys/archive_selfncch.h index f1b971296..f1c659948 100644 --- a/src/core/file_sys/archive_selfncch.h +++ b/src/core/file_sys/archive_selfncch.h @@ -24,6 +24,10 @@ struct NCCHData { std::shared_ptr<FileUtil::IOFile> romfs_file; u64 romfs_offset = 0; u64 romfs_size = 0; + + std::shared_ptr<FileUtil::IOFile> update_romfs_file; + u64 update_romfs_offset = 0; + u64 update_romfs_size = 0; }; /// File system interface to the SelfNCCH archive diff --git a/src/core/file_sys/ncch_container.cpp b/src/core/file_sys/ncch_container.cpp new file mode 100644 index 000000000..59c72f3e9 --- /dev/null +++ b/src/core/file_sys/ncch_container.cpp @@ -0,0 +1,316 @@ +// 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 "common/common_types.h" +#include "common/logging/log.h" +#include "core/core.h" +#include "core/file_sys/ncch_container.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) + +/** + * 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 = *(u32*)(buffer + size - 4); + 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 = *reinterpret_cast<const u32*>(footer); + 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) : filepath(filepath) { + file = FileUtil::IOFile(filepath, "rb"); +} + +Loader::ResultStatus NCCHContainer::OpenFile(const std::string& filepath) { + this->filepath = filepath; + file = FileUtil::IOFile(filepath, "rb"); + + if (!file.IsOpen()) { + LOG_WARNING(Service_FS, "Failed to open %s", filepath.c_str()); + return Loader::ResultStatus::Error; + } + + LOG_DEBUG(Service_FS, "Opened %s", filepath.c_str()); + return Loader::ResultStatus::Success; +} + +Loader::ResultStatus NCCHContainer::Load() { + if (is_loaded) + return Loader::ResultStatus::Success; + + // Reset read pointer in case this file has been read before. + file.Seek(0, 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; + + // 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; + + 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: %s", exheader_header.codeset_info.name); + LOG_DEBUG(Service_FS, "Program ID: %016" PRIX64, ncch_header.program_id); + LOG_DEBUG(Service_FS, "Code compressed: %s", 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: %d", core_version); + LOG_DEBUG(Service_FS, "Thread priority: 0x%X", priority); + LOG_DEBUG(Service_FS, "Resource limit category: %d", resource_limit_category); + LOG_DEBUG(Service_FS, "System Mode: %d", + static_cast<int>(exheader_header.arm11_system_local_caps.system_mode)); + + if (exheader_header.system_info.jump_id != ncch_header.program_id) { + LOG_ERROR(Service_FS, "ExHeader Program ID mismatch: the ROM is probably encrypted."); + return Loader::ResultStatus::ErrorEncrypted; + } + + 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; + + has_exefs = true; + } + + if (ncch_header.romfs_offset != 0 && ncch_header.romfs_size != 0) + has_romfs = true; + + is_loaded = true; + return Loader::ResultStatus::Success; +} + +Loader::ResultStatus NCCHContainer::LoadSectionExeFS(const char* name, std::vector<u8>& buffer) { + if (!file.IsOpen()) + return Loader::ResultStatus::Error; + + Loader::ResultStatus result = Load(); + if (result != Loader::ResultStatus::Success) + return result; + + if (!has_exefs) + return Loader::ResultStatus::ErrorNotUsed; + + LOG_DEBUG(Service_FS, "%d 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, "%d - offset: 0x%08X, size: 0x%08X, name: %s", section_number, + section.offset, section.size, section.name); + + s64 section_offset = + (section.offset + exefs_offset + sizeof(ExeFs_Header) + ncch_offset); + file.Seek(section_offset, SEEK_SET); + + 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 (file.ReadBytes(&temp_buffer[0], section.size) != section.size) + return Loader::ResultStatus::Error; + + // 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 (file.ReadBytes(&buffer[0], section.size) != section.size) + return Loader::ResultStatus::Error; + } + return Loader::ResultStatus::Success; + } + } + return Loader::ResultStatus::ErrorNotUsed; +} + +Loader::ResultStatus NCCHContainer::ReadRomFS(std::shared_ptr<FileUtil::IOFile>& romfs_file, + u64& offset, u64& size) { + if (!file.IsOpen()) + return Loader::ResultStatus::Error; + + Loader::ResultStatus result = Load(); + if (result != Loader::ResultStatus::Success) + return result; + + if (!has_romfs) { + LOG_DEBUG(Service_FS, "RomFS requested from NCCH which has no RomFS"); + return Loader::ResultStatus::ErrorNotUsed; + } + + 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 + romfs_file = std::make_shared<FileUtil::IOFile>(filepath, "rb"); + if (!romfs_file->IsOpen()) + return Loader::ResultStatus::Error; + + offset = romfs_offset; + size = romfs_size; + + return Loader::ResultStatus::Success; +} + +Loader::ResultStatus NCCHContainer::ReadProgramId(u64_le& program_id) { + Loader::ResultStatus result = Load(); + if (result != Loader::ResultStatus::Success) + return result; + + program_id = ncch_header.program_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 diff --git a/src/core/file_sys/ncch_container.h b/src/core/file_sys/ncch_container.h new file mode 100644 index 000000000..8af9032b4 --- /dev/null +++ b/src/core/file_sys/ncch_container.h @@ -0,0 +1,244 @@ +// Copyright 2017 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <cstddef> +#include <memory> +#include <string> +#include <vector> +#include "common/bit_field.h" +#include "common/common_types.h" +#include "common/file_util.h" +#include "common/swap.h" +#include "core/core.h" + +//////////////////////////////////////////////////////////////////////////////////////////////////// +/// NCCH header (Note: "NCCH" appears to be a publicly unknown acronym) + +struct NCCH_Header { + u8 signature[0x100]; + u32_le magic; + u32_le content_size; + u8 partition_id[8]; + u16_le maker_code; + u16_le version; + u8 reserved_0[4]; + u64_le program_id; + u8 reserved_1[0x10]; + u8 logo_region_hash[0x20]; + u8 product_code[0x10]; + u8 extended_header_hash[0x20]; + u32_le extended_header_size; + u8 reserved_2[4]; + u8 flags[8]; + u32_le plain_region_offset; + u32_le plain_region_size; + u32_le logo_region_offset; + u32_le logo_region_size; + u32_le exefs_offset; + u32_le exefs_size; + u32_le exefs_hash_region_size; + u8 reserved_3[4]; + u32_le romfs_offset; + u32_le romfs_size; + u32_le romfs_hash_region_size; + 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 |