From f0041cd7613a4f9700631dfe05e1b05627371fa8 Mon Sep 17 00:00:00 2001
From: Sean Parkinson <sean@wolfssl.com>
Date: Mon, 7 Jul 2025 18:43:29 +1000
Subject: [PATCH] SP int: fix 8 bit words and sp_clamp_ct

Need to cast to sp_size_t as it may be bigger than the word type
sp_int_digit.
---
 wolfcrypt/src/sp_int.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/wolfcrypt/src/sp_int.c b/wolfcrypt/src/sp_int.c
index e03d2ea39..1203a0683 100644
--- a/wolfcrypt/src/sp_int.c
+++ b/wolfcrypt/src/sp_int.c
@@ -8025,8 +8025,8 @@ static void sp_clamp_ct(sp_int* a)
             (sp_int_digit)((sp_int_sdigit)(negVal & minusOne) >>
                            (SP_WORD_SIZE - 1));
 #else
-        sp_int_digit zeroMask =
-            (sp_int_digit)((((sp_int_sword)a->dp[i]) - 1) >> SP_WORD_SIZE);
+        sp_size_t zeroMask =
+            (sp_size_t)((((sp_int_sword)a->dp[i]) - 1) >> SP_WORD_SIZE);
 #endif
         mask &= (sp_size_t)zeroMask;
         used = (sp_size_t)(used + mask);