Atmosphere/libraries/libstratosphere/include/stratosphere/fssystem/fssystem_nca_header.hpp
2020-05-14 02:22:24 -07:00

276 lines
8.9 KiB
C++

/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <vapours.hpp>
namespace ams::fssystem {
struct Hash {
static constexpr size_t Size = crypto::Sha256Generator::HashSize;
u8 value[Size];
};
static_assert(sizeof(Hash) == Hash::Size);
static_assert(util::is_pod<Hash>::value);
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(util::is_pod<FsInfo>::value);
static constexpr u32 Magic0 = util::FourCC<'N','C','A','0'>::Code;
static constexpr u32 Magic1 = util::FourCC<'N','C','A','1'>::Code;
static constexpr u32 Magic2 = util::FourCC<'N','C','A','2'>::Code;
static constexpr u32 Magic3 = util::FourCC<'N','C','A','3'>::Code;
static constexpr u32 Magic = Magic3;
static constexpr size_t Size = 1_KB;
static constexpr s32 FsCountMax = 4;
static constexpr size_t HeaderSignCount = 2;
static constexpr size_t HeaderSignSize = 0x100;
static constexpr size_t EncryptedKeyAreaSize = 0x100;
static constexpr size_t SectorSize = 0x200;
static constexpr size_t SectorShift = 9;
static constexpr size_t RightsIdSize = 0x10;
static constexpr size_t XtsBlockSize = 0x200;
static constexpr size_t CtrBlockSize = 0x10;
static_assert(SectorSize == (1 << SectorShift));
/* Data members. */
u8 header_sign_1[HeaderSignSize];
u8 header_sign_2[HeaderSignSize];
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;
u8 reserved_222[2];
u32 reserved_224[3];
u8 rights_id[RightsIdSize];
FsInfo fs_info[FsCountMax];
Hash fs_header_hash[FsCountMax];
u8 encrypted_key_area[EncryptedKeyAreaSize];
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(util::is_pod<NcaHeader>::value);
struct NcaBucketInfo {
static constexpr size_t HeaderSize = 0x10;
s64 offset;
s64 size;
u8 header[HeaderSize];
};
static_assert(util::is_pod<NcaBucketInfo>::value);
struct NcaPatchInfo {
static constexpr size_t Size = 0x40;
static constexpr size_t Offset = 0x100;
s64 indirect_offset;
s64 indirect_size;
u8 indirect_header[NcaBucketInfo::HeaderSize];
s64 aes_ctr_ex_offset;
s64 aes_ctr_ex_size;
u8 aes_ctr_ex_header[NcaBucketInfo::HeaderSize];
bool HasIndirectTable() const;
bool HasAesCtrExTable() const;
};
static_assert(util::is_pod<NcaPatchInfo>::value);
union NcaAesCtrUpperIv {
u64 value;
struct {
u32 generation;
u32 secure_value;
} part;
};
static_assert(util::is_pod<NcaAesCtrUpperIv>::value);
struct NcaSparseInfo {
NcaBucketInfo bucket;
s64 physical_offset;
u16 generation;
u8 reserved[6];
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(util::is_pod<NcaSparseInfo>::value);
struct NcaFsHeader {
static constexpr size_t Size = 0x200;
static constexpr size_t HashDataOffset = 0x8;
struct Region {
s64 offset;
s64 size;
};
static_assert(util::is_pod<Region>::value);
enum class FsType : u8 {
RomFs = 0,
PartitionFs = 1,
};
enum class EncryptionType : u8 {
Auto = 0,
None = 1,
AesXts = 2,
AesCtr = 3,
AesCtrEx = 4,
};
enum class HashType : u8 {
Auto = 0,
None = 1,
HierarchicalSha256Hash = 2,
HierarchicalIntegrityHash = 3,
};
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;
Region hash_layer_region[HashLayerCountMax];
} hierarchical_sha256_data;
static_assert(util::is_pod<HierarchicalSha256Data>::value);
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;
s64 offset;
s64 size;
s32 block_order;
u8 reserved[4];
} info[HierarchicalIntegrityVerificationLevelInformation::IntegrityMaxLayerCount - 1];
struct SignatureSalt {
static constexpr size_t Size = 0x20;
u8 value[Size];
} seed;
} level_hash_info;
Hash master_hash;
} integrity_meta_info;
static_assert(util::is_pod<IntegrityMetaInfo>::value);
u8 padding[NcaPatchInfo::Offset - HashDataOffset];
};
u16 version;
FsType fs_type;
HashType hash_type;
EncryptionType encryption_type;
u8 reserved[3];
HashData hash_data;
NcaPatchInfo patch_info;
NcaAesCtrUpperIv aes_ctr_upper_iv;
NcaSparseInfo sparse_info;
u8 pad[0x88];
};
static_assert(sizeof(NcaFsHeader) == NcaFsHeader::Size);
static_assert(util::is_pod<NcaFsHeader>::value);
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);
}