fix: sign nsis plugin DLLs

Author: thewh1teagle

.changes/nsis-sign-plugins.md

@@ -0,0 +1,5 @@
+---
+'tauri-bundler': 'patch:enhance'
+---
+
+Sign nsis plugin files when bundling

crates/tauri-bundler/src/bundle/windows/nsis/mod.rs

@@ -51,6 +51,16 @@ const NSIS_REQUIRED_FILES: &[&str] = &[
   "Include/nsDialogs.nsh",
   "Include/WinMessages.nsh",
 ];
+#[cfg(target_os = "windows")]
+const NSIS_PLUGIN_FILES: &[&str] = &[
+  "NSISdl.dll",
+  "StartMenu.dll",
+  "System.dll",
+  "nsDialogs.dll",
+  "nsis_tauri_utils.dll",
+];
+#[cfg(not(target_os = "windows"))]
+const NSIS_PLUGIN_FILES: &[&str] = &[];
 #[cfg(not(target_os = "windows"))]
 const NSIS_REQUIRED_FILES: &[&str] = &["Plugins/x86-unicode/nsis_tauri_utils.dll"];
 
@@ -517,6 +527,14 @@ fn build_nsis_app_installer(
   ));
   fs::create_dir_all(nsis_installer_path.parent().unwrap())?;
 
+  if settings.can_sign() {
+    log::info!("Signing NSIS plugins");
+    for dll in NSIS_PLUGIN_FILES {
+      let path = _nsis_toolset_path.join("Plugins/x86-unicode").join(dll);
+      try_sign(&path, settings)?;
+    }
+  }
+
   log::info!(action = "Running"; "makensis.exe to produce {}", display_path(&nsis_installer_path));
 
   #[cfg(target_os = "windows")]