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// 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
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