Fix check for BN_mod_inverse_ct return value

ok jsing@ millert@ tb@

1 files changed, 3 insertions, 3 deletions

diff --git a/src/lib/libcrypto/rsa/rsa_gen.c b/src/lib/libcrypto/rsa/rsa_gen.c
index 3a0d8837b4..5f062a7a24 100644
--- a/src/lib/libcrypto/rsa/rsa_gen.c
+++ b/src/lib/libcrypto/rsa/rsa_gen.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_gen.c,v 1.24 2022/01/07 09:55:32 tb Exp $ */
+/* $OpenBSD: rsa_gen.c,v 1.25 2022/01/20 11:11:17 inoguchi Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -198,7 +198,7 @@ rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb)
         BN_init(&pr0);
         BN_with_flags(&pr0, r0, BN_FLG_CONSTTIME);
 
-        if (!BN_mod_inverse_ct(rsa->d, rsa->e, &pr0, ctx)) /* d */
+        if (BN_mod_inverse_ct(rsa->d, rsa->e, &pr0, ctx) == NULL) /* d */
                 goto err;
 
         /* set up d for correct BN_FLG_CONSTTIME flag */
@@ -216,7 +216,7 @@ rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value, BN_GENCB *cb)
         /* calculate inverse of q mod p */
         BN_init(&p);
         BN_with_flags(&p, rsa->p, BN_FLG_CONSTTIME);
-        if (!BN_mod_inverse_ct(rsa->iqmp, rsa->q, &p, ctx))
+        if (BN_mod_inverse_ct(rsa->iqmp, rsa->q, &p, ctx) == NULL)
                 goto err;
 
         ok = 1;