mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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330 lines
11 KiB
C++
330 lines
11 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <vapours.hpp>
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#include <stratosphere/fssystem/fssystem_i_hash_256_generator.hpp>
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namespace ams::fssystem {
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/* ACCURATE_TO_VERSION: 14.3.0.0 */
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struct Hash {
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static constexpr size_t Size = IHash256Generator::HashSize;
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u8 value[Size];
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};
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static_assert(sizeof(Hash) == Hash::Size);
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static_assert(util::is_pod<Hash>::value);
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using NcaDigest = Hash;
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struct NcaHeader {
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enum class ContentType : u8 {
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Program = 0,
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Meta = 1,
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Control = 2,
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Manual = 3,
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Data = 4,
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PublicData = 5,
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Start = Program,
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End = PublicData,
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};
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enum class DistributionType : u8 {
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Download = 0,
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GameCard = 1,
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Start = Download,
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End = GameCard,
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};
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enum class EncryptionType : u8 {
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Auto = 0,
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None = 1,
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};
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enum DecryptionKey {
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DecryptionKey_AesXts = 0,
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DecryptionKey_AesXts1 = DecryptionKey_AesXts,
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DecryptionKey_AesXts2 = 1,
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DecryptionKey_AesCtr = 2,
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DecryptionKey_AesCtrEx = 3,
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DecryptionKey_AesCtrHw = 4,
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DecryptionKey_Count,
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};
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struct FsInfo {
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u32 start_sector;
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u32 end_sector;
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u32 hash_sectors;
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u32 reserved;
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};
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static_assert(sizeof(FsInfo) == 0x10);
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static_assert(util::is_pod<FsInfo>::value);
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static constexpr u32 Magic0 = util::FourCC<'N','C','A','0'>::Code;
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static constexpr u32 Magic1 = util::FourCC<'N','C','A','1'>::Code;
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static constexpr u32 Magic2 = util::FourCC<'N','C','A','2'>::Code;
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static constexpr u32 Magic3 = util::FourCC<'N','C','A','3'>::Code;
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static constexpr u32 Magic = Magic3;
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static constexpr size_t Size = 1_KB;
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static constexpr s32 FsCountMax = 4;
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static constexpr size_t HeaderSignCount = 2;
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static constexpr size_t HeaderSignSize = 0x100;
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static constexpr size_t EncryptedKeyAreaSize = 0x100;
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static constexpr size_t SectorSize = 0x200;
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static constexpr size_t SectorShift = 9;
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static constexpr size_t RightsIdSize = 0x10;
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static constexpr size_t XtsBlockSize = 0x200;
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static constexpr size_t CtrBlockSize = 0x10;
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static_assert(SectorSize == (1 << SectorShift));
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/* Data members. */
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u8 header_sign_1[HeaderSignSize];
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u8 header_sign_2[HeaderSignSize];
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u32 magic;
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DistributionType distribution_type;
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ContentType content_type;
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u8 key_generation;
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u8 key_index;
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u64 content_size;
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u64 program_id;
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u32 content_index;
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u32 sdk_addon_version;
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u8 key_generation_2;
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u8 header1_signature_key_generation;
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u8 reserved_222[2];
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u32 reserved_224[3];
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u8 rights_id[RightsIdSize];
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FsInfo fs_info[FsCountMax];
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Hash fs_header_hash[FsCountMax];
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u8 encrypted_key_area[EncryptedKeyAreaSize];
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static constexpr u64 SectorToByte(u32 sector) {
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return static_cast<u64>(sector) << SectorShift;
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}
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static constexpr u32 ByteToSector(u64 byte) {
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return static_cast<u32>(byte >> SectorShift);
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}
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u8 GetProperKeyGeneration() const;
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};
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static_assert(sizeof(NcaHeader) == NcaHeader::Size);
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static_assert(util::is_pod<NcaHeader>::value);
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struct NcaBucketInfo {
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static constexpr size_t HeaderSize = 0x10;
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fs::Int64 offset;
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fs::Int64 size;
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u8 header[HeaderSize];
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};
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static_assert(util::is_pod<NcaBucketInfo>::value);
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struct NcaPatchInfo {
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static constexpr size_t Size = 0x40;
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static constexpr size_t Offset = 0x100;
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fs::Int64 indirect_offset;
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fs::Int64 indirect_size;
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u8 indirect_header[NcaBucketInfo::HeaderSize];
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fs::Int64 aes_ctr_ex_offset;
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fs::Int64 aes_ctr_ex_size;
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u8 aes_ctr_ex_header[NcaBucketInfo::HeaderSize];
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bool HasIndirectTable() const;
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bool HasAesCtrExTable() const;
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};
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static_assert(util::is_pod<NcaPatchInfo>::value);
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union NcaAesCtrUpperIv {
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u64 value;
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struct {
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u32 generation;
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u32 secure_value;
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} part;
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};
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static_assert(util::is_pod<NcaAesCtrUpperIv>::value);
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struct NcaSparseInfo {
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NcaBucketInfo bucket;
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fs::Int64 physical_offset;
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u16 generation;
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u8 reserved[6];
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s64 GetPhysicalSize() const {
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return this->bucket.offset + this->bucket.size;
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}
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u32 GetGeneration() const {
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return static_cast<u32>(this->generation) << 16;
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}
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const NcaAesCtrUpperIv MakeAesCtrUpperIv(NcaAesCtrUpperIv upper_iv) const {
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NcaAesCtrUpperIv sparse_upper_iv = upper_iv;
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sparse_upper_iv.part.generation = this->GetGeneration();
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return sparse_upper_iv;
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}
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};
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static_assert(util::is_pod<NcaSparseInfo>::value);
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struct NcaCompressionInfo {
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NcaBucketInfo bucket;
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u8 reserved[8];
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};
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static_assert(util::is_pod<NcaCompressionInfo>::value);
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struct NcaMetaDataHashDataInfo {
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fs::Int64 offset;
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fs::Int64 size;
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Hash hash;
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};
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static_assert(util::is_pod<NcaMetaDataHashDataInfo>::value);
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struct NcaFsHeader {
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static constexpr size_t Size = 0x200;
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static constexpr size_t HashDataOffset = 0x8;
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struct Region {
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fs::Int64 offset;
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fs::Int64 size;
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};
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static_assert(util::is_pod<Region>::value);
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enum class FsType : u8 {
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RomFs = 0,
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PartitionFs = 1,
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};
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enum class EncryptionType : u8 {
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Auto = 0,
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None = 1,
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AesXts = 2,
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AesCtr = 3,
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AesCtrEx = 4,
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AesCtrSkipLayerHash = 5,
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AesCtrExSkipLayerHash = 6,
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};
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enum class HashType : u8 {
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Auto = 0,
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None = 1,
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HierarchicalSha256Hash = 2,
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HierarchicalIntegrityHash = 3,
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AutoSha3 = 4,
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HierarchicalSha3256Hash = 5,
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HierarchicalIntegritySha3Hash = 6,
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};
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enum class MetaDataHashType : u8 {
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None = 0,
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HierarchicalIntegrity = 1,
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};
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union HashData {
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struct HierarchicalSha256Data {
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static constexpr size_t HashLayerCountMax = 5;
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static const size_t MasterHashOffset;
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Hash fs_data_master_hash;
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s32 hash_block_size;
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s32 hash_layer_count;
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Region hash_layer_region[HashLayerCountMax];
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} hierarchical_sha256_data;
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static_assert(util::is_pod<HierarchicalSha256Data>::value);
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struct IntegrityMetaInfo {
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static const size_t MasterHashOffset;
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u32 magic;
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u32 version;
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u32 master_hash_size;
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struct LevelHashInfo {
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u32 max_layers;
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struct HierarchicalIntegrityVerificationLevelInformation {
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static constexpr size_t IntegrityMaxLayerCount = 7;
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fs::Int64 offset;
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fs::Int64 size;
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s32 block_order;
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u8 reserved[4];
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} info[HierarchicalIntegrityVerificationLevelInformation::IntegrityMaxLayerCount - 1];
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struct SignatureSalt {
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static constexpr size_t Size = 0x20;
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u8 value[Size];
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} seed;
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} level_hash_info;
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Hash master_hash;
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} integrity_meta_info;
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static_assert(util::is_pod<IntegrityMetaInfo>::value);
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u8 padding[NcaPatchInfo::Offset - HashDataOffset];
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};
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u16 version;
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FsType fs_type;
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HashType hash_type;
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EncryptionType encryption_type;
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MetaDataHashType meta_data_hash_type;
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u8 reserved[2];
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HashData hash_data;
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NcaPatchInfo patch_info;
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NcaAesCtrUpperIv aes_ctr_upper_iv;
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NcaSparseInfo sparse_info;
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NcaCompressionInfo compression_info;
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NcaMetaDataHashDataInfo meta_data_hash_data_info;
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u8 pad[0x30];
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bool IsSkipLayerHashEncryption() const {
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return this->encryption_type == EncryptionType::AesCtrSkipLayerHash || this->encryption_type == EncryptionType::AesCtrExSkipLayerHash;
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}
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Result GetHashTargetOffset(s64 *out) const {
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switch (this->hash_type) {
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case HashType::HierarchicalIntegrityHash:
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case HashType::HierarchicalIntegritySha3Hash:
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*out = this->hash_data.integrity_meta_info.level_hash_info.info[this->hash_data.integrity_meta_info.level_hash_info.max_layers - 2].offset;
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R_SUCCEED();
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case HashType::HierarchicalSha256Hash:
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case HashType::HierarchicalSha3256Hash:
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*out = this->hash_data.hierarchical_sha256_data.hash_layer_region[this->hash_data.hierarchical_sha256_data.hash_layer_count - 1].offset;
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R_SUCCEED();
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default:
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R_THROW(fs::ResultInvalidNcaFsHeader());
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}
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}
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};
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static_assert(sizeof(NcaFsHeader) == NcaFsHeader::Size);
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static_assert(util::is_pod<NcaFsHeader>::value);
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static_assert(AMS_OFFSETOF(NcaFsHeader, patch_info) == NcaPatchInfo::Offset);
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inline constexpr const size_t NcaFsHeader::HashData::HierarchicalSha256Data::MasterHashOffset = AMS_OFFSETOF(NcaFsHeader, hash_data.hierarchical_sha256_data.fs_data_master_hash);
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inline constexpr const size_t NcaFsHeader::HashData::IntegrityMetaInfo::MasterHashOffset = AMS_OFFSETOF(NcaFsHeader, hash_data.integrity_meta_info.master_hash);
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struct NcaMetaDataHashData {
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s64 layer_info_offset;
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NcaFsHeader::HashData::IntegrityMetaInfo integrity_meta_info;
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};
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static_assert(sizeof(NcaMetaDataHashData) == sizeof(NcaFsHeader::HashData::IntegrityMetaInfo) + sizeof(s64));
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static_assert(util::is_pod<NcaMetaDataHashData>::value);
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}
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