From 06e58295d6a8d6afe7686f3aab1bc07f74e2b68a Mon Sep 17 00:00:00 2001
From: Loup Vaillant <loup@loup-vaillant.fr>
Date: Sun, 5 Jul 2020 11:46:13 +0200
Subject: [PATCH] Better test for crypto_x25519_inverse()

---
 tests/test.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tests/test.c b/tests/test.c
index 271fd97..a6cb629 100644
--- a/tests/test.c
+++ b/tests/test.c
@@ -1009,13 +1009,15 @@ static int p_elligator_key_pair_overlap()
 static int p_x25519_inverse()
 {
     int status = 0;
-    const u8 base [32] = {9};
+    RANDOM_INPUT(b, 32);
+    u8 base[32];  // random point (cofactor is cleared).
+    crypto_x25519_public_key(base, b);
     // check round trip
     FOR (i, 0, 50) {
         RANDOM_INPUT(sk, 32);
         u8 pk   [32];
         u8 blind[32];
-        crypto_x25519_public_key(pk, sk);
+        crypto_x25519(pk, sk, base);
         crypto_x25519_inverse(blind, sk, pk);
         status |= memcmp(blind, base, 32);
     }
-- 
2.47.3