From ae4a4236ccbf1f9c01fac6d3c2d744eb1c38c051 Mon Sep 17 00:00:00 2001
From: JacobBarthelmeh <jacob@wolfssl.com>
Date: Thu, 8 May 2025 13:42:02 -0600
Subject: [PATCH] fix for index value with curve25519

---
 wolfcrypt/src/curve25519.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/wolfcrypt/src/curve25519.c b/wolfcrypt/src/curve25519.c
index f1fd4e239..789db3fa2 100644
--- a/wolfcrypt/src/curve25519.c
+++ b/wolfcrypt/src/curve25519.c
@@ -194,11 +194,11 @@ static int curve25519_smul_blind(byte* rp, const byte* n, const byte* p,
         if (ret < 0) {
             return ret;
         }
-        for (i = CURVE25519_KEYSIZE; i > 0; i--) {
+        for (i = CURVE25519_KEYSIZE - 1; i >= 0; i--) {
             if (rz[i] != 0xff)
                 break;
         }
-        if ((i != 0) || (rz[0] <= 0xec)) {
+        if ((i >= 0) || (rz[0] <= 0xec)) {
             break;
         }
     }