Add preallocation dance for X509_ALGOR_set_md() as documented

1 files changed, 5 insertions, 1 deletions

diff --git a/src/regress/lib/libcrypto/asn1/x509_algor.c b/src/regress/lib/libcrypto/asn1/x509_algor.c
index 6e0e651221..6f53c3d034 100644
--- a/src/regress/lib/libcrypto/asn1/x509_algor.c
+++ b/src/regress/lib/libcrypto/asn1/x509_algor.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: x509_algor.c,v 1.1 2023/10/11 12:49:00 tb Exp $ */
+/*      $OpenBSD: x509_algor.c,v 1.2 2023/10/11 13:00:16 tb Exp $ */
 /*
  * Copyright (c) 2023 Theo Buehler <tb@openbsd.org>
  *
@@ -339,6 +339,10 @@ x509_algor_set_md_test(void)
                 goto failure;
         }
 
+        /* Preallocate as recommended in the manual. */
+        if (!X509_ALGOR_set0(alg, NULL, 0, NULL))
+                errx(1, "%s: X509_ALGOR_set0", __func__);
+
         X509_ALGOR_set_md(alg, EVP_md5());
         X509_ALGOR_get0(&aobj, &ptype, NULL, alg);
         if ((nid = OBJ_obj2nid(aobj)) != NID_md5) {