From 7e2755166a9c0f704e2e81aff45d91881b9ef921 Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Sun, 26 Apr 2020 20:00:49 +0200
Subject: [PATCH] Add a scalarmult test to show that the high bit is ignored

---
 test/default/scalarmult.c   | 6 ++++++
 test/default/scalarmult.exp | 1 +
 2 files changed, 7 insertions(+)

diff --git a/test/default/scalarmult.c b/test/default/scalarmult.c
index 0e055380..b410fcd1 100644
--- a/test/default/scalarmult.c
+++ b/test/default/scalarmult.c
@@ -52,6 +52,12 @@ main(void)
     sodium_bin2hex(hex, sizeof hex, k, crypto_scalarmult_BYTES);
     printf("%s\n", hex);
 
+    alicepk[31] ^= 0x80;
+    ret = crypto_scalarmult(k, bobsk, alicepk);
+    assert(ret == 0);
+    sodium_bin2hex(hex, sizeof hex, k, crypto_scalarmult_BYTES);
+    printf("%s\n", hex);
+
     ret = crypto_scalarmult(k, bobsk, small_order_p);
     assert(ret == -1);
 
diff --git a/test/default/scalarmult.exp b/test/default/scalarmult.exp
index 1a38d891..df1d2736 100644
--- a/test/default/scalarmult.exp
+++ b/test/default/scalarmult.exp
@@ -2,3 +2,4 @@
 de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f
 4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742
 4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742
+4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742