// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include "core/file_sys/fssystem/fssystem_compression_common.h"
#include "core/file_sys/fssystem/fssystem_nca_header.h"
#include "core/file_sys/vfs/vfs.h"
namespace FileSys {
class CompressedStorage;
class AesCtrCounterExtendedStorage;
class IndirectStorage;
class SparseStorage;
struct NcaCryptoConfiguration;
using KeyGenerationFunction = void (*)(void* dst_key, size_t dst_key_size, const void* src_key,
size_t src_key_size, s32 key_type);
using VerifySign1Function = bool (*)(const void* sig, size_t sig_size, const void* data,
size_t data_size, u8 generation);
struct NcaCryptoConfiguration {
static constexpr size_t Rsa2048KeyModulusSize = 2048 / 8;
static constexpr size_t Rsa2048KeyPublicExponentSize = 3;
static constexpr size_t Rsa2048KeyPrivateExponentSize = Rsa2048KeyModulusSize;
static constexpr size_t Aes128KeySize = 128 / 8;
static constexpr size_t Header1SignatureKeyGenerationMax = 1;
static constexpr s32 KeyAreaEncryptionKeyIndexCount = 3;
static constexpr s32 HeaderEncryptionKeyCount = 2;
static constexpr u8 KeyAreaEncryptionKeyIndexZeroKey = 0xFF;
static constexpr size_t KeyGenerationMax = 32;
std::array<const u8*, Header1SignatureKeyGenerationMax + 1> header_1_sign_key_moduli;
std::array<u8, Rsa2048KeyPublicExponentSize> header_1_sign_key_public_exponent;
std::array<std::array<u8, Aes128KeySize>, KeyAreaEncryptionKeyIndexCount>
key_area_encryption_key_source;
std::array<u8, Aes128KeySize> header_encryption_key_source;
std::array<std::array<u8, Aes128KeySize>, HeaderEncryptionKeyCount>
header_encrypted_encryption_keys;
KeyGenerationFunction generate_key;
VerifySign1Function verify_sign1;
bool is_plaintext_header_available;
bool is_available_sw_key;
};
static_assert(std::is_trivial_v<NcaCryptoConfiguration>);
struct NcaCompressionConfiguration {
GetDecompressorFunction get_decompressor;
};
static_assert(std::is_trivial_v<NcaCompressionConfiguration>);
constexpr inline s32 KeyAreaEncryptionKeyCount =
NcaCryptoConfiguration::KeyAreaEncryptionKeyIndexCount *
NcaCryptoConfiguration::KeyGenerationMax;
enum class KeyType : s32 {
ZeroKey = -2,
InvalidKey = -1,
NcaHeaderKey1 = KeyAreaEncryptionKeyCount + 0,
NcaHeaderKey2 = KeyAreaEncryptionKeyCount + 1,
NcaExternalKey = KeyAreaEncryptionKeyCount + 2,
SaveDataDeviceUniqueMac = KeyAreaEncryptionKeyCount + 3,
SaveDataSeedUniqueMac = KeyAreaEncryptionKeyCount + 4,
SaveDataTransferMac = KeyAreaEncryptionKeyCount + 5,
};
constexpr inline bool IsInvalidKeyTypeValue(s32 key_type) {
return key_type < 0;
}
constexpr inline s32 GetKeyTypeValue(u8 key_index, u8 key_generation) {
if (key_index == NcaCryptoConfiguration::KeyAreaEncryptionKeyIndexZeroKey) {
return static_cast<s32>(KeyType::ZeroKey);
}
if (key_index >= NcaCryptoConfiguration::KeyAreaEncryptionKeyIndexCount) {
return static_cast<s32>(KeyType::InvalidKey);
}
return NcaCryptoConfiguration::KeyAreaEncryptionKeyIndexCount * key_generation + key_index;
}
class NcaReader {
YUZU_NON_COPYABLE(NcaReader);
YUZU_NON_MOVEABLE(NcaReader);
public:
NcaReader();
~NcaReader();
Result Initialize(VirtualFile base_storage, const NcaCryptoConfiguration& crypto_cfg,
const NcaCompressionConfiguration& compression_cfg);
VirtualFile GetSharedBodyStorage();
u32 GetMagic() const;
NcaHeader::DistributionType GetDistributionType() const;
NcaHeader::ContentType GetContentType() const;
u8 GetHeaderSign1KeyGeneration() const;
u8 GetKeyGeneration() const;
u8 GetKeyIndex() const;
u64 GetContentSize() const;
u64 GetProgramId() const;
u32 GetContentIndex() const;
u32 GetSdkAddonVersion() const;
void GetRightsId(u8* dst, size_t dst_size) const;
bool HasFsInfo(s32 index) const;
s32 GetFsCount() const;
const Hash& GetFsHeaderHash(s32 index) const;
void GetFsHeaderHash(Hash* dst, s32 index) const;
void GetFsInfo(NcaHeader::FsInfo* dst, s32 index) const;
u64 GetFsOffset(s32 index) const;
u64 GetFsEndOffset(s32 index) const;
u64 GetFsSize(s32 index) const;
void GetEncryptedKey(void* dst, size_t size) const;
const void* GetDecryptionKey(s32 index) const;
bool HasValidInternalKey() const;
bool HasInternalDecryptionKeyForAesHw() const;
bool IsSoftwareAesPrioritized() const;
void PrioritizeSoftwareAes();
bool IsAvailableSwKey() const;
bool HasExternalDecryptionKey() const;
const void* GetExternalDecryptionKey() const;
void SetExternalDecryptionKey(const void* src, size_t size);
void GetRawData(void* dst, size_t dst_size) const;
NcaHeader::EncryptionType GetEncryptionType() const;
Result ReadHeader(NcaFsHeader* dst, s32 index) const;
GetDecompressorFunction GetDecompressor() const;
bool GetHeaderSign1Valid() const;
void GetHeaderSign2(void* dst, size_t size) const;
private:
NcaHeader m_header;
std::array<std::array<u8, NcaCryptoConfiguration::Aes128KeySize>,
NcaHeader::DecryptionKey_Count>
m_decryption_keys;
VirtualFile m_body_storage;
VirtualFile m_header_storage;
std::array<u8, NcaCryptoConfiguration::Aes128KeySize> m_external_decryption_key;
bool m_is_software_aes_prioritized;
bool m_is_available_sw_key;
NcaHeader::EncryptionType m_header_encryption_type;
bool m_is_header_sign1_signature_valid;
GetDecompressorFunction m_get_decompressor;
};
class NcaFsHeaderReader {
YUZU_NON_COPYABLE(NcaFsHeaderReader);
YUZU_NON_MOVEABLE(NcaFsHeaderReader);
public:
NcaFsHeaderReader() : m_fs_index(-1) {
std::memset(std::addressof(m_data), 0, sizeof(m_data));
}
Result Initialize(const NcaReader& reader, s32 index);
bool IsInitialized() const {
return m_fs_index >= 0;
}
void GetRawData(void* dst, size_t dst_size) const;
NcaFsHeader::HashData& GetHashData();
const NcaFsHeader::HashData& GetHashData() const;
u16 GetVersion() const;
s32 GetFsIndex() const;
NcaFsHeader::FsType GetFsType() const;
NcaFsHeader::HashType GetHashType() const;
NcaFsHeader::EncryptionType GetEncryptionType() const;
NcaPatchInfo& GetPatchInfo();
const NcaPatchInfo& GetPatchInfo() const;
const NcaAesCtrUpperIv GetAesCtrUpperIv() const;
bool IsSkipLayerHashEncryption() const;
Result GetHashTargetOffset(s64* out) const;
bool ExistsSparseLayer() const;
NcaSparseInfo& GetSparseInfo();
const NcaSparseInfo& GetSparseInfo() const;
bool ExistsCompressionLayer() const;
NcaCompressionInfo& GetCompressionInfo();
const NcaCompressionInfo& GetCompressionInfo() const;
bool ExistsPatchMetaHashLayer() const;
NcaMetaDataHashDataInfo& GetPatchMetaDataHashDataInfo();
const NcaMetaDataHashDataInfo& GetPatchMetaDataHashDataInfo() const;
NcaFsHeader::MetaDataHashType GetPatchMetaHashType() const;
bool ExistsSparseMetaHashLayer() const;
NcaMetaDataHashDataInfo& GetSparseMetaDataHashDataInfo();
const NcaMetaDataHashDataInfo& GetSparseMetaDataHashDataInfo() const;
NcaFsHeader::MetaDataHashType GetSparseMetaHashType() const;
private:
NcaFsHeader m_data;
s32 m_fs_index;
};
class NcaFileSystemDriver {
YUZU_NON_COPYABLE(NcaFileSystemDriver);
YUZU_NON_MOVEABLE(NcaFileSystemDriver);
public:
struct StorageContext {
bool open_raw_storage;
VirtualFile body_substorage;
std::shared_ptr<SparseStorage> current_sparse_storage;
VirtualFile sparse_storage_meta_storage;
std::shared_ptr<SparseStorage> original_sparse_storage;
void* external_current_sparse_storage;
void* external_original_sparse_storage;
VirtualFile aes_ctr_ex_storage_meta_storage;
VirtualFile aes_ctr_ex_storage_data_storage;
std::shared_ptr<AesCtrCounterExtendedStorage> aes_ctr_ex_storage;
VirtualFile indirect_storage_meta_storage;
std::shared_ptr<IndirectStorage> indirect_storage;
VirtualFile fs_data_storage;
VirtualFile compressed_storage_meta_storage;
std::shared_ptr<CompressedStorage> compressed_storage;
VirtualFile patch_layer_info_storage;
VirtualFile sparse_layer_info_storage;
VirtualFile external_original_storage;
};
private:
enum class AlignmentStorageRequirement {
CacheBlockSize = 0,
None = 1,
};
public:
static Result SetupFsHeaderReader(NcaFsHeaderReader* out, const NcaReader& reader,
s32 fs_index);
public:
NcaFileSystemDriver(std::shared_ptr<NcaReader> reader) : m_original_reader(), m_reader(reader) {
ASSERT(m_reader != nullptr);
}
NcaFileSystemDriver(std::shared_ptr<NcaReader> original_reader,
std::shared_ptr<NcaReader> reader)
: m_original_reader(original_reader), m_reader(reader) {
ASSERT(m_reader != nullptr);
}
Result OpenStorageWithContext(VirtualFile* out, NcaFsHeaderReader* out_header_reader,
s32 fs_index, StorageContext* ctx);
Result OpenStorage(VirtualFile* out, NcaFsHeaderReader* out_header_reader, s32 fs_index) {
// Create a storage context.
StorageContext ctx{};
// Open the storage.
R_RETURN(OpenStorageWithContext(out, out_header_reader, fs_index, std::addressof(ctx)));
}
public:
Result CreateStorageByRawStorage(VirtualFile* out, const NcaFsHeaderReader* header_reader,
VirtualFile raw_storage, StorageContext* ctx);
private:
Result OpenStorageImpl(VirtualFile* out, NcaFsHeaderReader* out_header_reader, s32 fs_index,
StorageContext* ctx);
Result OpenIndirectableStorageAsOriginal(VirtualFile* out,
const NcaFsHeaderReader* header_reader,
StorageContext* ctx);
Result CreateBodySubStorage(VirtualFile* out, s64 offset, s64 size);
Result CreateAesCtrStorage(VirtualFile* out, VirtualFile base_storage, s64 offset,
const NcaAesCtrUpperIv& upper_iv,
AlignmentStorageRequirement alignment_storage_requirement);
Result CreateAesXtsStorage(VirtualFile* out, VirtualFile base_storage, s64 offset);
Result CreateSparseStorageMetaStorage(VirtualFile* out, VirtualFile base_storage, s64 offset,
const NcaAesCtrUpperIv& upper_iv,
const NcaSparseInfo& sparse_info);
Result CreateSparseStorageCore(std::shared_ptr<SparseStorage>* out, VirtualFile base_storage,
s64 base_size, VirtualFile meta_storage,
const NcaSparseInfo& sparse_info, bool external_info);
Result CreateSparseStorage(VirtualFile* out, s64* out_fs_data_offset,
std::shared_ptr<SparseStorage>* out_sparse_storage,
VirtualFile* out_meta_storage, s32 index,
const NcaAesCtrUpperIv& upper_iv, const NcaSparseInfo& sparse_info);
Result CreateSparseStorageMetaStorageWithVerification(
VirtualFile* out, VirtualFile* out_verification, VirtualFile base_storage, s64 offset,
const NcaAesCtrUpperIv& upper_iv, const NcaSparseInfo& sparse_info,
const NcaMetaDataHashDataInfo& meta_data_hash_data_info);
Result CreateSparseStorageWithVerification(
VirtualFile* out, s64* out_fs_data_offset,
std::shared_ptr<SparseStorage>* out_sparse_storage, VirtualFile* out_meta_storage,
VirtualFile* out_verification, s32 index, const NcaAesCtrUpperIv& upper_iv,
const NcaSparseInfo& sparse_info, const NcaMetaDataHashDataInfo& meta_data_hash_data_info,
NcaFsHeader::MetaDataHashType meta_data_hash_type);
Result CreateAesCtrExStorageMetaStorage(VirtualFile* out, VirtualFile base_storage, s64 offset,
NcaFsHeader::EncryptionType encryption_type,
const NcaAesCtrUpperIv& upper_iv,
const NcaPatchInfo& patch_info);
Result CreateAesCtrExStorage(VirtualFile* out,
std::shared_ptr<AesCtrCounterExtendedStorage>* out_ext,
VirtualFile base_storage, VirtualFile meta_storage,
s64 counter_offset, const NcaAesCtrUpperIv& upper_iv,
const NcaPatchInfo& patch_info);
Result CreateIndirectStorageMetaStorage(VirtualFile* out, VirtualFile base_storage,
const NcaPatchInfo& patch_info);
Result CreateIndirectStorage(VirtualFile* out, std::shared_ptr<IndirectStorage>* out_ind,
VirtualFile base_storage, VirtualFile original_data_storage,
VirtualFile meta_storage, const NcaPatchInfo& patch_info);
Result CreatePatchMetaStorage(VirtualFile* out_aes_ctr_ex_meta, VirtualFile* out_indirect_meta,
VirtualFile* out_verification, VirtualFile base_storage,
s64 offset, const NcaAesCtrUpperIv& upper_iv,
const NcaPatchInfo& patch_info,
const NcaMetaDataHashDataInfo& meta_data_hash_data_info);
Result CreateSha256Storage(VirtualFile* out, VirtualFile base_storage,
const NcaFsHeader::HashData::HierarchicalSha256Data& sha256_data);
Result CreateIntegrityVerificationStorage(
VirtualFile* out, VirtualFile base_storage,
const NcaFsHeader::HashData::IntegrityMetaInfo& meta_info);
Result CreateIntegrityVerificationStorageForMeta(
VirtualFile* out, VirtualFile* out_verification, VirtualFile base_storage, s64 offset,
const NcaMetaDataHashDataInfo& meta_data_hash_data_info);
Result CreateIntegrityVerificationStorageImpl(
VirtualFile* out, VirtualFile base_storage,
const NcaFsHeader::HashData::IntegrityMetaInfo& meta_info, s64 layer_info_offset,
int max_data_cache_entries, int max_hash_cache_entries, s8 buffer_level);
Result CreateRegionSwitchStorage(VirtualFile* out, const NcaFsHeaderReader* header_reader,
VirtualFile inside_storage, VirtualFile outside_storage);
Result CreateCompressedStorage(VirtualFile* out, std::shared_ptr<CompressedStorage>* out_cmp,
VirtualFile* out_meta, VirtualFile base_storage,
const NcaCompressionInfo& compression_info);
public:
Result CreateCompressedStorage(VirtualFile* out, std::shared_ptr<CompressedStorage>* out_cmp,
VirtualFile* out_meta, VirtualFile base_storage,
const NcaCompressionInfo& compression_info,
GetDecompressorFunction get_decompressor);
private:
std::shared_ptr<NcaReader> m_original_reader;
std::shared_ptr<NcaReader> m_reader;
};
} // namespace FileSys
