From db0d148ca19b035f5869dd061b612dfd3b2c5ade Mon Sep 17 00:00:00 2001
From: Sam Hadow <sam.hadow@proton.me>
Date: Tue, 28 Apr 2026 14:00:07 +0200
Subject: [PATCH] cargo clippy

---
 src/main.rs        |  2 ++
 src/tea1_attack.rs | 16 ++++++++++------
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 4ed5558..ba50641 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+#![allow(dead_code)]
+
 mod lfsr;
 mod period;
 mod tea1;
diff --git a/src/tea1_attack.rs b/src/tea1_attack.rs
index f70f902..5836346 100644
--- a/src/tea1_attack.rs
+++ b/src/tea1_attack.rs
@@ -17,8 +17,8 @@ const fn precompute_deriv_lut(lut: &[u16; 8]) -> [u8; 65536] {
             if (lut[i] & (1u16 << dist)) != 0 {
                 out |= 1u8 << i;
             }
-            st0 = (st0 >> 1) | (st0 << 7);
-            st1 = (st1 >> 1) | (st1 << 7);
+            st0 = st0.rotate_right(1);
+            st1 = st1.rotate_right(1);
             i += 1;
         }
         table[wst] = out;
@@ -40,8 +40,12 @@ const fn precompute_reorder_lut() -> [u8; 256] {
     table
 }
 
-const DERIV_A_LUT: [u8; 65536] = precompute_deriv_lut(&TEA1_LUT_A);
-const DERIV_B_LUT: [u8; 65536] = precompute_deriv_lut(&TEA1_LUT_B);
+#[allow(long_running_const_eval)]
+static DERIV_A_LUT: [u8; 65536] = precompute_deriv_lut(&TEA1_LUT_A);
+
+#[allow(long_running_const_eval)]
+static DERIV_B_LUT: [u8; 65536] = precompute_deriv_lut(&TEA1_LUT_B);
+
 const REORDER_LUT: [u8; 256]   = precompute_reorder_lut();
 
 // 5 bytes: 54 + 19*4 = 149 rounds max
@@ -50,10 +54,10 @@ const MAX_ROUNDS: usize = 149;
 #[inline(always)]
 fn precompute_sbox_seq(mut key_reg: u32, n_rounds: usize) -> [u8; MAX_ROUNDS] {
     let mut seq = [0u8; MAX_ROUNDS];
-    for i in 0..n_rounds {
+    for slot in seq.iter_mut().take(n_rounds) {
         let idx = (((key_reg >> 24) ^ key_reg) & 0xFF) as usize;
         let so  = TEA1_SBOX[idx];
-        seq[i]  = so;
+        *slot   = so;
         key_reg = (key_reg << 8) | (so as u32);
     }
     seq