From d4469c24ec4c363413b7be90dea29b83d635de41 Mon Sep 17 00:00:00 2001
From: NIIBE Yutaka <gniibe@fsij.org>
Date: Fri, 21 Oct 2016 15:30:07 +0900
Subject: [PATCH] fix NIST P-256 / secp256k1 key generation.

---
 ChangeLog | 4 ++++
 src/ecc.c | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 94c8eab..74e9e29 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2016-10-21  Niibe Yutaka  <gniibe@fsij.org>
+
+	* src/ecc.c (check_secret): Fix condition.
+
 2016-10-15  NIIBE Yutaka  <gniibe@fsij.org>
 
 	* VERSION: 1.2.2.
diff --git a/src/ecc.c b/src/ecc.c
index f32b819..2d637e9 100644
--- a/src/ecc.c
+++ b/src/ecc.c
@@ -384,7 +384,7 @@ FUNC(check_secret) (const bn256 *d0, bn256 *d1)
 {
   ac Q0[1], Q1[1];
 
-  if (bn256_is_zero (d0) || bn256_sub (d1, N, d0) <= 0)
+  if (bn256_is_zero (d0) || bn256_sub (d1, N, d0) != 0)
     /* == 0 or >= N, it's not valid.  */
     return 0;