Improve BN_bn2bin() error check for readability

diff --git a/lib/libcrypto/ecdsa/ecdsa.c b/lib/libcrypto/ecdsa/ecdsa.c
index 20d605c..d0cc846 100644 (file)
--- a/lib/libcrypto/ecdsa/ecdsa.c
+++ b/lib/libcrypto/ecdsa/ecdsa.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ecdsa.c,v 1.2 2023/07/05 12:27:36 tb Exp $ */
+/* $OpenBSD: ecdsa.c,v 1.3 2023/07/05 12:49:42 tb Exp $ */
 /* ====================================================================
  * Copyright (c) 2000-2002 The OpenSSL Project.  All rights reserved.
  *
@@ -196,7 +196,7 @@ ecdsa_prepare_digest(const unsigned char *digest, int digest_len,
        const EC_GROUP *group;
        int digest_bits, order_bits;
 
-       if (!BN_bin2bn(digest, digest_len, e)) {
+       if (BN_bin2bn(digest, digest_len, e) == NULL) {
                ECDSAerror(ERR_R_BN_LIB);
                return 0;
        }