Merge pull request #1361 from lioncash/nax

xts_archive/nax: Minor interface changes

src/core/file_sys/xts_archive.cpp

@@ -30,9 +30,6 @@ static bool CalculateHMAC256(Destination* out, const SourceKey* key, std::size_t
     mbedtls_md_context_t context;
     mbedtls_md_init(&context);
 
-    const auto key_f = reinterpret_cast<const u8*>(key);
-    const std::vector<u8> key_v(key_f, key_f + key_length);
-
     if (mbedtls_md_setup(&context, mbedtls_md_info_from_type(MBEDTLS_MD_SHA256), 1) ||
         mbedtls_md_hmac_starts(&context, reinterpret_cast<const u8*>(key), key_length) ||
         mbedtls_md_hmac_update(&context, reinterpret_cast<const u8*>(data), data_length) ||
@@ -45,7 +42,7 @@ static bool CalculateHMAC256(Destination* out, const SourceKey* key, std::size_t
     return true;
 }
 
-NAX::NAX(VirtualFile file_) : file(std::move(file_)), header(std::make_unique<NAXHeader>()) {
+NAX::NAX(VirtualFile file_) : header(std::make_unique<NAXHeader>()), file(std::move(file_)) {
     std::string path = FileUtil::SanitizePath(file->GetFullPath());
     static const std::regex nax_path_regex("/registered/(000000[0-9A-F]{2})/([0-9A-F]{32})\\.nca",
                                            std::regex_constants::ECMAScript |
@@ -65,7 +62,7 @@ NAX::NAX(VirtualFile file_) : file(std::move(file_)), header(std::make_unique<NA
 }
 
 NAX::NAX(VirtualFile file_, std::array<u8, 0x10> nca_id)
-    : file(std::move(file_)), header(std::make_unique<NAXHeader>()) {
+    : header(std::make_unique<NAXHeader>()), file(std::move(file_)) {
     Core::Crypto::SHA256Hash hash{};
     mbedtls_sha256(nca_id.data(), nca_id.size(), hash.data(), 0);
     status = Parse(fmt::format("/registered/000000{:02X}/{}.nca", hash[0],
@@ -138,9 +135,9 @@ VirtualFile NAX::GetDecrypted() const {
     return dec_file;
 }
 
-std::shared_ptr<NCA> NAX::AsNCA() const {
+std::unique_ptr<NCA> NAX::AsNCA() const {
     if (type == NAXContentType::NCA)
-        return std::make_shared<NCA>(GetDecrypted());
+        return std::make_unique<NCA>(GetDecrypted());
     return nullptr;
 }
 

src/core/file_sys/xts_archive.h

@@ -38,7 +38,7 @@ public:
 
     VirtualFile GetDecrypted() const;
 
-    std::shared_ptr<NCA> AsNCA() const;
+    std::unique_ptr<NCA> AsNCA() const;
 
     NAXContentType GetContentType() const;
 
@@ -60,7 +60,7 @@ private:
 
     VirtualFile file;
     Loader::ResultStatus status;
-    NAXContentType type;
+    NAXContentType type{};
 
     VirtualFile dec_file;
 

src/core/loader/nax.cpp

@@ -11,6 +11,20 @@
 #include "core/loader/nca.h"
 
 namespace Loader {
+namespace {
+FileType IdentifyTypeImpl(const FileSys::NAX& nax) {
+    if (nax.GetStatus() != ResultStatus::Success) {
+        return FileType::Error;
+    }
+
+    const auto nca = nax.AsNCA();
+    if (nca == nullptr || nca->GetStatus() != ResultStatus::Success) {
+        return FileType::Error;
+    }
+
+    return FileType::NAX;
+}
+} // Anonymous namespace
 
 AppLoader_NAX::AppLoader_NAX(FileSys::VirtualFile file)
     : AppLoader(file), nax(std::make_unique<FileSys::NAX>(file)),
@@ -19,14 +33,12 @@ AppLoader_NAX::AppLoader_NAX(FileSys::VirtualFile file)
 AppLoader_NAX::~AppLoader_NAX() = default;
 
 FileType AppLoader_NAX::IdentifyType(const FileSys::VirtualFile& file) {
-    FileSys::NAX nax(file);
-
-    if (nax.GetStatus() == ResultStatus::Success && nax.AsNCA() != nullptr &&
-        nax.AsNCA()->GetStatus() == ResultStatus::Success) {
-        return FileType::NAX;
-    }
+    const FileSys::NAX nax(file);
+    return IdentifyTypeImpl(nax);
+}
 
-    return FileType::Error;
+FileType AppLoader_NAX::GetFileType() {
+    return IdentifyTypeImpl(*nax);
 }
 
 ResultStatus AppLoader_NAX::Load(Kernel::SharedPtr<Kernel::Process>& process) {

src/core/loader/nax.h

@@ -31,9 +31,7 @@ public:
      */
     static FileType IdentifyType(const FileSys::VirtualFile& file);
 
-    FileType GetFileType() override {
-        return IdentifyType(file);
-    }
+    FileType GetFileType() override;
 
     ResultStatus Load(Kernel::SharedPtr<Kernel::Process>& process) override;