feat: optimize

src/util.rs

@@ -19,6 +19,12 @@ impl Drop for SecVec {
     }
 }
 
+impl AsRef<[u8]> for SecVec {
+    fn as_ref(&self) -> &[u8] {
+        &self.0
+    }
+}
+
 pub fn read_pin(pin: &Option<String>) -> String {
     match pin {
         Some(pin) => pin.to_string(),