yuzu/src/core/file_sys/content_archive.h
Zach Hilman 4f18c17df7 content_archive: Add update title detection
This is needed because the title IDs of update NCAs will not use the update title ID. The only sure way to tell is to look for a partition with BKTR crypto.
2018-08-23 18:53:13 -04:00

126 lines
3.4 KiB
C++

// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <memory>
#include <string>
#include <vector>
#include <boost/optional.hpp>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/swap.h"
#include "control_metadata.h"
#include "core/crypto/key_manager.h"
#include "core/file_sys/partition_filesystem.h"
#include "core/loader/loader.h"
namespace FileSys {
union NCASectionHeader;
enum class NCAContentType : u8 {
Program = 0,
Meta = 1,
Control = 2,
Manual = 3,
Data = 4,
Data_Unknown5 = 5, ///< Seems to be used on some system archives
};
enum class NCASectionCryptoType : u8 {
NONE = 1,
XTS = 2,
CTR = 3,
BKTR = 4,
};
struct NCASectionTableEntry {
u32_le media_offset;
u32_le media_end_offset;
INSERT_PADDING_BYTES(0x8);
};
static_assert(sizeof(NCASectionTableEntry) == 0x10, "NCASectionTableEntry has incorrect size.");
struct NCAHeader {
std::array<u8, 0x100> rsa_signature_1;
std::array<u8, 0x100> rsa_signature_2;
u32_le magic;
u8 is_system;
NCAContentType content_type;
u8 crypto_type;
u8 key_index;
u64_le size;
u64_le title_id;
INSERT_PADDING_BYTES(0x4);
u32_le sdk_version;
u8 crypto_type_2;
INSERT_PADDING_BYTES(15);
std::array<u8, 0x10> rights_id;
std::array<NCASectionTableEntry, 0x4> section_tables;
std::array<std::array<u8, 0x20>, 0x4> hash_tables;
std::array<u8, 0x40> key_area;
INSERT_PADDING_BYTES(0xC0);
};
static_assert(sizeof(NCAHeader) == 0x400, "NCAHeader has incorrect size.");
inline bool IsDirectoryExeFS(const std::shared_ptr<VfsDirectory>& pfs) {
// According to switchbrew, an exefs must only contain these two files:
return pfs->GetFile("main") != nullptr && pfs->GetFile("main.npdm") != nullptr;
}
bool IsValidNCA(const NCAHeader& header);
// An implementation of VfsDirectory that represents a Nintendo Content Archive (NCA) conatiner.
// After construction, use GetStatus to determine if the file is valid and ready to be used.
class NCA : public ReadOnlyVfsDirectory {
public:
explicit NCA(VirtualFile file);
Loader::ResultStatus GetStatus() const;
std::vector<std::shared_ptr<VfsFile>> GetFiles() const override;
std::vector<std::shared_ptr<VfsDirectory>> GetSubdirectories() const override;
std::string GetName() const override;
std::shared_ptr<VfsDirectory> GetParentDirectory() const override;
NCAContentType GetType() const;
u64 GetTitleId() const;
VirtualFile GetRomFS() const;
VirtualDir GetExeFS() const;
VirtualFile GetBaseFile() const;
bool IsUpdate() const;
protected:
bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;
private:
u8 GetCryptoRevision() const;
boost::optional<Core::Crypto::Key128> GetKeyAreaKey(NCASectionCryptoType type) const;
boost::optional<Core::Crypto::Key128> GetTitlekey();
VirtualFile Decrypt(NCASectionHeader header, VirtualFile in, u64 starting_offset);
std::vector<VirtualDir> dirs;
std::vector<VirtualFile> files;
VirtualFile romfs = nullptr;
VirtualDir exefs = nullptr;
VirtualFile file;
NCAHeader header{};
bool has_rights_id{};
bool is_update{};
Loader::ResultStatus status{};
bool encrypted;
Core::Crypto::KeyManager keys;
};
} // namespace FileSys