From 219509d7d9874e0d25c65c7c1e620bcb19adf898 Mon Sep 17 00:00:00 2001
From: Sean Parkinson <sean@wolfssl.com>
Date: Thu, 19 Jun 2025 09:56:28 +1000
Subject: [PATCH] SP int: modular exponentiation constant time

Using a 1-bit window size for small exponentsisn't useful.
---
 wolfcrypt/src/sp_int.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/wolfcrypt/src/sp_int.c b/wolfcrypt/src/sp_int.c
index b5c832d3e..cd1db57eb 100644
--- a/wolfcrypt/src/sp_int.c
+++ b/wolfcrypt/src/sp_int.c
@@ -14207,9 +14207,6 @@ static int _sp_exptmod_nct(const sp_int* b, const sp_int* e, const sp_int* m,
     if (bits > 450) {
         winBits = 6;
     }
-    else if (bits <= 21) {
-        winBits = 1;
-    }
     else if (bits <= 36) {
         winBits = 3;
     }