From 347f3b343ad2e57cfeb77195b304d2ac6fe0abd6 Mon Sep 17 00:00:00 2001
From: tb <>
Date: Wed, 11 Oct 2023 13:00:16 +0000
Subject: Add preallocation dance for X509_ALGOR_set_md() as documented

---
 src/regress/lib/libcrypto/asn1/x509_algor.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src')

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) {
-- 
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