From 3d7e6563d134ba44280f79d65ce7832fa39ef123 Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Fri, 2 Jan 2026 12:00:59 +0100
Subject: [PATCH] Remove unnecessary multiplication
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To make the check projective‑invariant.
---
 src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c b/src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c
index 55369757..2f62a8a5 100644
--- a/src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c
+++ b/src/libsodium/crypto_core/ed25519/ref10/ed25519_ref10.c
@@ -1180,8 +1180,7 @@ ge25519_has_small_order(const ge25519_p3 *p)
     fe25519_mul(y_sqrtm1, p->Y, fe25519_sqrtm1);
     fe25519_sub(c, y_sqrtm1, p->X);
     ret |= fe25519_iszero(c);
-    fe25519_mul(c, p->X, p->Z);
-    fe25519_add(c, y_sqrtm1, c);
+    fe25519_add(c, y_sqrtm1, p->X);
     ret |= fe25519_iszero(c);
 
     return ret;