From 84209949c46887bb553cef76fb200c5752d14cca Mon Sep 17 00:00:00 2001
From: inoguchi <inoguchi@openbsd.org>
Date: Thu, 20 Jan 2022 11:08:12 +0000
Subject: [PATCH] Fix check for BN_mod_inverse_ct return value

ok jsing@ millert@ tb@
---
 lib/libcrypto/rsa/rsa_chk.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/libcrypto/rsa/rsa_chk.c b/lib/libcrypto/rsa/rsa_chk.c
index 807eae084eb..ac9dbf7a227 100644
--- a/lib/libcrypto/rsa/rsa_chk.c
+++ b/lib/libcrypto/rsa/rsa_chk.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_chk.c,v 1.15 2022/01/10 00:03:02 tb Exp $ */
+/* $OpenBSD: rsa_chk.c,v 1.16 2022/01/20 11:08:12 inoguchi Exp $ */
 /* ====================================================================
  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
  *
@@ -199,7 +199,7 @@ RSA_check_key(const RSA *key)
 		}
 
 		/* iqmp = q^-1 mod p? */
-		if (!BN_mod_inverse_ct(i, key->q, key->p, ctx)) {
+		if (BN_mod_inverse_ct(i, key->q, key->p, ctx) == NULL) {
 			ret = -1;
 			goto err;
 		}
-- 
2.20.1