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