// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/literals.h"
#include "core/file_sys/errors.h"
#include "core/file_sys/fssystem/fs_types.h"
namespace FileSys {
using namespace Common::Literals;
struct Hash {
static constexpr std::size_t Size = 256 / 8;
std::array<u8, Size> value;
};
static_assert(sizeof(Hash) == Hash::Size);
static_assert(std::is_trivial_v<Hash>);
using NcaDigest = Hash;
struct NcaHeader {
enum class ContentType : u8 {
Program = 0,
Meta = 1,
Control = 2,
Manual = 3,
Data = 4,
PublicData = 5,
Start = Program,
End = PublicData,
};
enum class DistributionType : u8 {
Download = 0,
GameCard = 1,
Start = Download,
End = GameCard,
};
enum class EncryptionType : u8 {
Auto = 0,
None = 1,
};
enum DecryptionKey {
DecryptionKey_AesXts = 0,
DecryptionKey_AesXts1 = DecryptionKey_AesXts,
DecryptionKey_AesXts2 = 1,
DecryptionKey_AesCtr = 2,
DecryptionKey_AesCtrEx = 3,
DecryptionKey_AesCtrHw = 4,
DecryptionKey_Count,
};
struct FsInfo {
u32 start_sector;
u32 end_sector;
u32 hash_sectors;
u32 reserved;
};
static_assert(sizeof(FsInfo) == 0x10);
static_assert(std::is_trivial_v<FsInfo>);
static constexpr u32 Magic0 = Common::MakeMagic('N', 'C', 'A', '0');
static constexpr u32 Magic1 = Common::MakeMagic('N', 'C', 'A', '1');
static constexpr u32 Magic2 = Common::MakeMagic('N', 'C', 'A', '2');
static constexpr u32 Magic3 = Common::MakeMagic('N', 'C', 'A', '3');
static constexpr u32 Magic = Magic3;
static constexpr std::size_t Size = 1_KiB;
static constexpr s32 FsCountMax = 4;
static constexpr std::size_t HeaderSignCount = 2;
static constexpr std::size_t HeaderSignSize = 0x100;
static constexpr std::size_t EncryptedKeyAreaSize = 0x100;
static constexpr std::size_t SectorSize = 0x200;
static constexpr std::size_t SectorShift = 9;
static constexpr std::size_t RightsIdSize = 0x10;
static constexpr std::size_t XtsBlockSize = 0x200;
static constexpr std::size_t CtrBlockSize = 0x10;
static_assert(SectorSize == (1 << SectorShift));
// Data members.
std::array<u8, HeaderSignSize> header_sign_1;
std::array<u8, HeaderSignSize> header_sign_2;
u32 magic;
DistributionType distribution_type;
ContentType content_type;
u8 key_generation;
u8 key_index;
u64 content_size;
u64 program_id;
u32 content_index;
u32 sdk_addon_version;
u8 key_generation_2;
u8 header1_signature_key_generation;
std::array<u8, 2> reserved_222;
std::array<u32, 3> reserved_224;
std::array<u8, RightsIdSize> rights_id;
std::array<FsInfo, FsCountMax> fs_info;
std::array<Hash, FsCountMax> fs_header_hash;
std::array<u8, EncryptedKeyAreaSize> encrypted_key_area;
static constexpr u64 SectorToByte(u32 sector) {
return static_cast<u64>(sector) << SectorShift;
}
static constexpr u32 ByteToSector(u64 byte) {
return static_cast<u32>(byte >> SectorShift);
}
u8 GetProperKeyGeneration() const;
};
static_assert(sizeof(NcaHeader) == NcaHeader::Size);
static_assert(std::is_trivial_v<NcaHeader>);
struct NcaBucketInfo {
static constexpr size_t HeaderSize = 0x10;
Int64 offset;
Int64 size;
std::array<u8, HeaderSize> header;
};
static_assert(std::is_trivial_v<NcaBucketInfo>);
struct NcaPatchInfo {
static constexpr size_t Size = 0x40;
static constexpr size_t Offset = 0x100;
Int64 indirect_offset;
Int64 indirect_size;
std::array<u8, NcaBucketInfo::HeaderSize> indirect_header;
Int64 aes_ctr_ex_offset;
Int64 aes_ctr_ex_size;
std::array<u8, NcaBucketInfo::HeaderSize> aes_ctr_ex_header;
bool HasIndirectTable() const;
bool HasAesCtrExTable() const;
};
static_assert(std::is_trivial_v<NcaPatchInfo>);
union NcaAesCtrUpperIv {
u64 value;
struct {
u32 generation;
u32 secure_value;
} part;
};
static_assert(std::is_trivial_v<NcaAesCtrUpperIv>);
struct NcaSparseInfo {
NcaBucketInfo bucket;
Int64 physical_offset;
u16 generation;
std::array<u8, 6> reserved;
s64 GetPhysicalSize() const {
return this->bucket.offset + this->bucket.size;
}
u32 GetGeneration() const {
return static_cast<u32>(this->generation) << 16;
}
const NcaAesCtrUpperIv MakeAesCtrUpperIv(NcaAesCtrUpperIv upper_iv) const {
NcaAesCtrUpperIv sparse_upper_iv = upper_iv;
sparse_upper_iv.part.generation = this->GetGeneration();
return sparse_upper_iv;
}
};
static_assert(std::is_trivial_v<NcaSparseInfo>);
struct NcaCompressionInfo {
NcaBucketInfo bucket;
std::array<u8, 8> resreved;
};
static_assert(std::is_trivial_v<NcaCompressionInfo>);
struct NcaMetaDataHashDataInfo {
Int64 offset;
Int64 size;
Hash hash;
};
static_assert(std::is_trivial_v<NcaMetaDataHashDataInfo>);
struct NcaFsHeader {
static constexpr size_t Size = 0x200;
static constexpr size_t HashDataOffset = 0x8;
struct Region {
Int64 offset;
Int64 size;
};
static_assert(std::is_trivial_v<Region>);
enum class FsType : u8 {
RomFs = 0,
PartitionFs = 1,
};
enum class EncryptionType : u8 {
Auto = 0,
None = 1,
AesXts = 2,
AesCtr = 3,
AesCtrEx = 4,
AesCtrSkipLayerHash = 5,
AesCtrExSkipLayerHash = 6,
};
enum class HashType : u8 {
Auto = 0,
None = 1,
HierarchicalSha256Hash = 2,
HierarchicalIntegrityHash = 3,
AutoSha3 = 4,
HierarchicalSha3256Hash = 5,
HierarchicalIntegritySha3Hash = 6,
};
enum class MetaDataHashType : u8 {
None = 0,
HierarchicalIntegrity = 1,
};
union HashData {
struct HierarchicalSha256Data {
static constexpr size_t HashLayerCountMax = 5;
static const size_t MasterHashOffset;
Hash fs_data_master_hash;
s32 hash_block_size;
s32 hash_layer_count;
std::array<Region, HashLayerCountMax> hash_layer_region;
} hierarchical_sha256_data;
static_assert(std::is_trivial_v<HierarchicalSha256Data>);
struct IntegrityMetaInfo {
static const size_t MasterHashOffset;
u32 magic;
u32 version;
u32 master_hash_size;
struct LevelHashInfo {
u32 max_layers;
struct HierarchicalIntegrityVerificationLevelInformation {
static constexpr size_t IntegrityMaxLayerCount = 7;
Int64 offset;
Int64 size;
s32 block_order;
std::array<u8, 4> reserved;
};
std::array<
HierarchicalIntegrityVerificationLevelInformation,
HierarchicalIntegrityVerificationLevelInformation::IntegrityMaxLayerCount - 1>
info;
struct SignatureSalt {
static constexpr size_t Size = 0x20;
std::array<u8, Size> value;
};
SignatureSalt seed;
} level_hash_info;
Hash master_hash;
} integrity_meta_info;
static_assert(std::is_trivial_v<IntegrityMetaInfo>);
std::array<u8, NcaPatchInfo::Offset - HashDataOffset> padding;
};
u16 version;
FsType fs_type;
HashType hash_type;
EncryptionType encryption_type;
MetaDataHashType meta_data_hash_type;
std::array<u8, 2> reserved;
HashData hash_data;
NcaPatchInfo patch_info;
NcaAesCtrUpperIv aes_ctr_upper_iv;
NcaSparseInfo sparse_info;
NcaCompressionInfo compression_info;
NcaMetaDataHashDataInfo meta_data_hash_data_info;
std::array<u8, 0x30> pad;
bool IsSkipLayerHashEncryption() const {
return this->encryption_type == EncryptionType::AesCtrSkipLayerHash ||
this->encryption_type == EncryptionType::AesCtrExSkipLayerHash;
}
Result GetHashTargetOffset(s64* out) const {
switch (this->hash_type) {
case HashType::HierarchicalIntegrityHash:
case HashType::HierarchicalIntegritySha3Hash:
*out = this->hash_data.integrity_meta_info.level_hash_info
.info[this->hash_data.integrity_meta_info.level_hash_info.max_layers - 2]
.offset;
R_SUCCEED();
case HashType::HierarchicalSha256Hash:
case HashType::HierarchicalSha3256Hash:
*out =
this->hash_data.hierarchical_sha256_data
.hash_layer_region[this->hash_data.hierarchical_sha256_data.hash_layer_count -
1]
.offset;
R_SUCCEED();
default:
R_THROW(ResultInvalidNcaFsHeader);
}
}
};
static_assert(sizeof(NcaFsHeader) == NcaFsHeader::Size);
static_assert(std::is_trivial_v<NcaFsHeader>);
static_assert(offsetof(NcaFsHeader, patch_info) == NcaPatchInfo::Offset);
inline constexpr const size_t NcaFsHeader::HashData::HierarchicalSha256Data::MasterHashOffset =
offsetof(NcaFsHeader, hash_data.hierarchical_sha256_data.fs_data_master_hash);
inline constexpr const size_t NcaFsHeader::HashData::IntegrityMetaInfo::MasterHashOffset =
offsetof(NcaFsHeader, hash_data.integrity_meta_info.master_hash);
struct NcaMetaDataHashData {
s64 layer_info_offset;
NcaFsHeader::HashData::IntegrityMetaInfo integrity_meta_info;
};
static_assert(sizeof(NcaMetaDataHashData) ==
sizeof(NcaFsHeader::HashData::IntegrityMetaInfo) + sizeof(s64));
static_assert(std::is_trivial_v<NcaMetaDataHashData>);
} // namespace FileSys
