Add a simple test to ensure that pmeth->cleanup() can cope with NULL

pkey_ctx->data.

src/regress/lib/libcrypto/evp/Makefile

@@ -1,18 +1,23 @@
-#	$OpenBSD: Makefile,v 1.6 2022/01/14 09:38:50 tb Exp $
+#	$OpenBSD: Makefile,v 1.7 2022/03/30 08:57:26 tb Exp $
 
-PROGS=	evptest evp_pkey_check
+PROGS=	evptest evp_pkey_check evp_pkey_cleanup
 LDADD=	-lcrypto
 DPADD=	${LIBCRYPTO}
 WARNINGS=	Yes
 CFLAGS+=	-DLIBRESSL_INTERNAL -DLIBRESSL_CRYPTO_INTERNAL -Werror
+CFLAGS+=	-I${.CURDIR}/../../../../lib/libcrypto/evp
 
 REGRESS_TARGETS+=	regress-evptest
 REGRESS_TARGETS+=	regress-evp_pkey_check
+REGRESS_TARGETS+=	regress-evp_pkey_cleanup
 
 regress-evptest:	evptest
 	./evptest ${.CURDIR}/evptests.txt
 
 regress-evp_pkey_check: evp_pkey_check
 	./evp_pkey_check
 
+regress-evp_pkey_cleanup: evp_pkey_cleanup
+	./evp_pkey_cleanup
+
 .include <bsd.regress.mk>

src/regress/lib/libcrypto/evp/evp_pkey_cleanup.c

@@ -0,0 +1,86 @@
+/*	$OpenBSD: evp_pkey_cleanup.c,v 1.1 2022/03/30 08:57:26 tb Exp $ */
+
+/*
+ * Copyright (c) 2022 Theo Buehler <[email protected]>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <stdio.h>
+
+#include <openssl/evp.h>
+
+#include "evp_locl.h"
+
+struct pkey_cleanup_test {
+	const char *name;
+	int nid;
+	void (*free)(void);
+};
+
+int pkey_ids[] = {
+	EVP_PKEY_CMAC,
+	EVP_PKEY_DH,
+	EVP_PKEY_DSA,
+	EVP_PKEY_EC,
+	EVP_PKEY_GOSTIMIT,
+	EVP_PKEY_GOSTR01,
+	EVP_PKEY_HMAC,
+	EVP_PKEY_RSA,
+	EVP_PKEY_RSA_PSS,
+};
+
+static const size_t N_PKEY_IDS = sizeof(pkey_ids) / sizeof(pkey_ids[0]);
+
+static int
+test_evp_pkey_ctx_cleanup(int nid)
+{
+	EVP_PKEY_CTX *pkey_ctx = NULL;
+	void *data;
+	int failed = 1;
+
+	if ((pkey_ctx = EVP_PKEY_CTX_new_id(nid, NULL)) == NULL) {
+		fprintf(stderr, "EVP_PKEY_CTX_new_id(%d, NULL) failed\n", nid);
+		goto err;
+	}
+
+	data = EVP_PKEY_CTX_get_data(pkey_ctx);
+
+	EVP_PKEY_CTX_set_data(pkey_ctx, NULL);
+	if (pkey_ctx->pmeth->cleanup != NULL)
+		pkey_ctx->pmeth->cleanup(pkey_ctx);
+
+	EVP_PKEY_CTX_set_data(pkey_ctx, data);
+
+	failed = 0;
+
+ err:
+	EVP_PKEY_CTX_free(pkey_ctx);
+
+	return failed;
+}
+
+int
+main(void)
+{
+	size_t i;
+	int failed = 0;
+
+	for (i = 0; i < N_PKEY_IDS; i++)
+		failed |= test_evp_pkey_ctx_cleanup(pkey_ids[i]);
+
+	if (!failed)
+		printf("SUCCESS\n");
+
+	return failed;
+}