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vfs: expand support for NCA reading

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This commit is contained in:
Liam 2023-08-10 21:34:43 -04:00
parent ec3d07e683
commit 5e3139e7c6
75 changed files with 8055 additions and 1043 deletions
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66
src/core/file_sys/content_archive.h
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@ -21,7 +21,7 @@ enum class ResultStatus : u16;
namespace FileSys {
union NCASectionHeader;
class NcaReader;
/// Describes the type of content within an NCA archive.
enum class NCAContentType : u8 {
@ -45,41 +45,7 @@ enum class NCAContentType : u8 {
PublicData = 5,
};
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.");
using RightsId = std::array<u8, 0x10>;
inline bool IsDirectoryExeFS(const VirtualDir& pfs) {
// According to switchbrew, an exefs must only contain these two files:
@ -97,8 +63,7 @@ inline bool IsDirectoryLogoPartition(const VirtualDir& pfs) {
// 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, VirtualFile bktr_base_romfs = nullptr,
u64 bktr_base_ivfc_offset = 0);
explicit NCA(VirtualFile file, const NCA* base_nca = nullptr);
~NCA() override;
Loader::ResultStatus GetStatus() const;
@ -110,7 +75,7 @@ public:
NCAContentType GetType() const;
u64 GetTitleId() const;
std::array<u8, 0x10> GetRightsId() const;
RightsId GetRightsId() const;
u32 GetSDKVersion() const;
bool IsUpdate() const;
@ -119,26 +84,9 @@ public:
VirtualFile GetBaseFile() const;
// Returns the base ivfc offset used in BKTR patching.
u64 GetBaseIVFCOffset() const;
VirtualDir GetLogoPartition() const;
private:
bool CheckSupportedNCA(const NCAHeader& header);
bool HandlePotentialHeaderDecryption();
std::vector<NCASectionHeader> ReadSectionHeaders() const;
bool ReadSections(const std::vector<NCASectionHeader>& sections, u64 bktr_base_ivfc_offset);
bool ReadRomFSSection(const NCASectionHeader& section, const NCASectionTableEntry& entry,
u64 bktr_base_ivfc_offset);
bool ReadPFS0Section(const NCASectionHeader& section, const NCASectionTableEntry& entry);
u8 GetCryptoRevision() const;
std::optional<Core::Crypto::Key128> GetKeyAreaKey(NCASectionCryptoType type) const;
std::optional<Core::Crypto::Key128> GetTitlekey();
VirtualFile Decrypt(const NCASectionHeader& header, VirtualFile in, u64 starting_offset);
std::vector<VirtualDir> dirs;
std::vector<VirtualFile> files;
@ -146,11 +94,6 @@ private:
VirtualDir exefs = nullptr;
VirtualDir logo = nullptr;
VirtualFile file;
VirtualFile bktr_base_romfs;
u64 ivfc_offset = 0;
NCAHeader header{};
bool has_rights_id{};
Loader::ResultStatus status{};
@ -158,6 +101,7 @@ private:
bool is_update = false;
Core::Crypto::KeyManager& keys;
std::shared_ptr<NcaReader> reader;
};
} // namespace FileSys