feat: update normalize_nonce

src/lib.rs

@@ -137,6 +137,11 @@ impl Aes128GcmStreamEncryptor {
 
     fn normalize_nonce(&mut self, nonce_bytes: &[u8]) -> (u128, u128) {
         let ghash_key = self.ghash_key();
+        normalize_nonce(ghash_key, nonce_bytes)
+    }
+}
+
+fn normalize_nonce(ghash_key: u128, nonce_bytes: &[u8]) -> (u128, u128) {
     let nonce = u8to128(nonce_bytes);
     let normalized_nonce = match nonce_bytes.len() == 12 {
         true => {
@@ -152,10 +157,8 @@ impl Aes128GcmStreamEncryptor {
         }
     };
     (ghash_key, normalized_nonce)
-    }
 }
 
-
 // R = 11100001 || 0(120)
 const R: u128 = 0b11100001 << 120;