Fix file permissions on windows (#1758)

* [service] Set file permissions on windows

* [service] Fix minor windows permission bugs

* [service] Fix permission bugs

* [service] Fix windows non admin user start

base/database/storage/fstree/fstree.go

@@ -15,6 +15,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/hectane/go-acl"
 	"github.com/safing/portmaster/base/database/iterator"
 	"github.com/safing/portmaster/base/database/query"
 	"github.com/safing/portmaster/base/database/record"
@@ -288,10 +289,13 @@ func writeFile(filename string, data []byte, perm os.FileMode) error {
 	defer t.Cleanup() //nolint:errcheck
 
 	// Set permissions before writing data, in case the data is sensitive.
-	if !onWindows {
-		if err := t.Chmod(perm); err != nil {
-			return err
-		}
+	if onWindows {
+		err = acl.Chmod(filename, perm)
+	} else {
+		err = t.Chmod(perm)
+	}
+	if err != nil {
+		return err
 	}
 
 	if _, err := t.Write(data); err != nil {