boxdd: Add insecure mode

experimental/boxdd/insecure_mode.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"path/filepath"
+
+	"github.com/sagernet/sing/common/json"
+	"github.com/sagernet/tailscale/atomicfile"
+)
+
+const securitySettingsFileName = "security.json"
+
+type securitySettings struct {
+	InsecureModeEnabled bool `json:"insecure_mode_enabled"`
+}
+
+func saveSecuritySettings(directory string, settings securitySettings) error {
+	content, err := json.Marshal(settings)
+	if err != nil {
+		return err
+	}
+	return atomicfile.WriteFile(filepath.Join(directory, securitySettingsFileName), content, 0o600)
+}