submission_package: Move ticket key setting to its own function

This behavior is entirely independent of the surrounding code, so it can
be put in its own function to keep the behavior separate.

src/core/file_sys/submission_package.cpp

@@ -18,6 +18,33 @@
 #include "core/loader/loader.h"
 
 namespace FileSys {
+namespace {
+void SetTicketKeys(const std::vector<VirtualFile>& files) {
+    Core::Crypto::KeyManager keys;
+
+    for (const auto& ticket_file : files) {
+        if (ticket_file->GetExtension() != "tik") {
+            continue;
+        }
+
+        if (ticket_file == nullptr ||
+            ticket_file->GetSize() <
+                Core::Crypto::TICKET_FILE_TITLEKEY_OFFSET + sizeof(Core::Crypto::Key128)) {
+            continue;
+        }
+
+        Core::Crypto::Key128 key{};
+        ticket_file->Read(key.data(), key.size(), Core::Crypto::TICKET_FILE_TITLEKEY_OFFSET);
+        std::string_view name_only(ticket_file->GetName());
+        name_only.remove_suffix(4);
+        const auto rights_id_raw = Common::HexStringToArray<16>(name_only);
+        u128 rights_id;
+        std::memcpy(rights_id.data(), rights_id_raw.data(), sizeof(u128));
+        keys.SetKey(Core::Crypto::S128KeyType::Titlekey, key, rights_id[1], rights_id[0]);
+    }
+}
+} // Anonymous namespace
+
 NSP::NSP(VirtualFile file_)
     : file(std::move(file_)), status{Loader::ResultStatus::Success},
       pfs(std::make_shared<PartitionFilesystem>(file)) {
@@ -43,27 +70,7 @@ NSP::NSP(VirtualFile file_)
     extracted = false;
     const auto files = pfs->GetFiles();
 
-    Core::Crypto::KeyManager keys;
-    for (const auto& ticket_file : files) {
-        if (ticket_file->GetExtension() != "tik") {
-            continue;
-        }
-
-        if (ticket_file == nullptr ||
-            ticket_file->GetSize() <
-            Core::Crypto::TICKET_FILE_TITLEKEY_OFFSET + sizeof(Core::Crypto::Key128)) {
-            continue;
-        }
-
-        Core::Crypto::Key128 key{};
-        ticket_file->Read(key.data(), key.size(), Core::Crypto::TICKET_FILE_TITLEKEY_OFFSET);
-        std::string_view name_only(ticket_file->GetName());
-        name_only.remove_suffix(4);
-        const auto rights_id_raw = Common::HexStringToArray<16>(name_only);
-        u128 rights_id;
-        std::memcpy(rights_id.data(), rights_id_raw.data(), sizeof(u128));
-        keys.SetKey(Core::Crypto::S128KeyType::Titlekey, key, rights_id[1], rights_id[0]);
-    }
+    SetTicketKeys(files);
 
     for (const auto& outer_file : files) {
         if (outer_file->GetName().substr(outer_file->GetName().size() - 9) != ".cnmt.nca") {