sign_sig: test on assignment

diff --git a/lib/libcrypto/ecdsa/ecs_ossl.c b/lib/libcrypto/ecdsa/ecs_ossl.c
index 73aed6e..1dce05c 100644 (file)
--- a/lib/libcrypto/ecdsa/ecs_ossl.c
+++ b/lib/libcrypto/ecdsa/ecs_ossl.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ecs_ossl.c,v 1.58 2023/07/03 11:06:28 tb Exp $ */
+/* $OpenBSD: ecs_ossl.c,v 1.59 2023/07/03 11:10:28 tb Exp $ */
 /*
  * Written by Nils Larsch for the OpenSSL project
  */
@@ -278,10 +278,11 @@ ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len,
        int attempts = 0;
        ECDSA_SIG *sig = NULL;
 
-       group = EC_KEY_get0_group(eckey);
-       priv_key = EC_KEY_get0_private_key(eckey);
-
-       if (group == NULL || priv_key == NULL) {
+       if ((group = EC_KEY_get0_group(eckey)) == NULL) {
+               ECDSAerror(ERR_R_PASSED_NULL_PARAMETER);
+               goto err;
+       }
+       if ((priv_key = EC_KEY_get0_private_key(eckey)) == NULL) {
                ECDSAerror(ERR_R_PASSED_NULL_PARAMETER);
                goto err;
        }