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.

2 files changed, 11 insertions, 0 deletions

diff --git a/src/core/file_sys/content_archive.cpp b/src/core/file_sys/content_archive.cpp
index 008e11d8c..e8b5d6ece 100644
--- a/src/core/file_sys/content_archive.cpp
+++ b/src/core/file_sys/content_archive.cpp
@@ -258,6 +258,10 @@ NCA::NCA(VirtualFile file_) : file(std::move(file_)) {
         file->ReadBytes(sections.data(), length_sections, SECTION_HEADER_OFFSET);
     }
 
+    is_update = std::find_if(sections.begin(), sections.end(), [](const NCASectionHeader& header) {
+                    return header.raw.header.crypto_type == NCASectionCryptoType::BKTR;
+                }) != sections.end();
+
     for (std::ptrdiff_t i = 0; i < number_sections; ++i) {
         auto section = sections[i];
 
@@ -358,6 +362,10 @@ VirtualFile NCA::GetBaseFile() const {
     return file;
 }
 
+bool NCA::IsUpdate() const {
+    return is_update;
+}
+
 bool NCA::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
     return false;
 }
diff --git a/src/core/file_sys/content_archive.h b/src/core/file_sys/content_archive.h
index 4b74c54ec..b961cfde7 100644
--- a/src/core/file_sys/content_archive.h
+++ b/src/core/file_sys/content_archive.h
@@ -93,6 +93,8 @@ public:
 
     VirtualFile GetBaseFile() const;
 
+    bool IsUpdate() const;
+
 protected:
     bool ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) override;
 
@@ -111,6 +113,7 @@ private:
 
     NCAHeader header{};
     bool has_rights_id{};
+    bool is_update{};
 
     Loader::ResultStatus status{};