tests: added unit test for RDNs in cert callbacktmp-draft-ietf-tls-tls13-21-nmav-backports2

This verifies whether the RDNs received at the callbacks under
TLS1.2 and TLS1.3 have the expected values (corresponding to the
certificates used).

Resolves #297

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

2 files changed, 196 insertions, 1 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index b9d3ba5e50..e7c5a12340 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -125,7 +125,7 @@ ctests += mini-record-2 simple gc set_pkcs12_cred cert certuniqueid tls-neg-ext-
 	 mini-dtls-fork mini-dtls-pthread mini-key-material x509cert-invalid \
 	 tls-ext-register tls-supplemental mini-dtls0-9 duplicate-extensions \
 	 mini-record-retvals mini-server-name tls-etm x509-cert-callback \
-	 client-sign-md5-rep tls12-invalid-key-exchanges \
+	 client-sign-md5-rep tls12-invalid-key-exchanges session-rdn-read \
 	 tls13-cert-key-exchange \
 	 server-sign-md5-rep privkey-keygen mini-tls-nonblock no-signal pkcs7-gen dtls-etm \
 	 x509sign-verify-rsa x509sign-verify-ecdsa mini-alignment oids atfork prf psk-file \
diff --git a/tests/session-rdn-read.c b/tests/session-rdn-read.c
new file mode 100644
index 0000000000..c308508596
--- /dev/null
+++ b/tests/session-rdn-read.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GnuTLS.
+ *
+ * GnuTLS is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuTLS is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/abstract.h>
+#include <gnutls/x509.h>
+#include "utils.h"
+#include "eagain-common.h"
+#include "cert-common.h"
+
+/* This tests whether the certificate callback receives the
+ * corresponding to server certificates relative distinguished names.
+ */
+
+const char *side;
+
+#define TOTAL_CAS 2
+
+#define CA1_PTR &ca3_cert
+#define CA2_PTR &ca_cert
+gnutls_datum_t ca_dn[TOTAL_CAS];
+
+static void tls_log_func(int level, const char *str)
+{
+	fprintf(stderr, "%s|<%d>| %s", side, level, str);
+}
+
+static int
+cert_callback(gnutls_session_t session,
+	      const gnutls_datum_t * req_ca_rdn, int nreqs,
+	      const gnutls_pk_algorithm_t * pk_algos,
+	      int pk_algos_length, gnutls_pcert_st ** pcert,
+	      unsigned int *pcert_length, gnutls_privkey_t * pkey)
+{
+	unsigned i;
+
+	if (nreqs != TOTAL_CAS) {
+		fail("cert_callback: found only %d RDNs\n", nreqs);
+	}
+
+	for (i = 0;i < TOTAL_CAS;i++) {
+		if (req_ca_rdn[i].size != ca_dn[i].size) {
+			fail("CA[%d] size mismatch\n", i);
+		}
+
+		if (memcmp(req_ca_rdn[i].data, ca_dn[i].data, ca_dn[i].size) != 0) {
+			fail("CA[%d] data mismatch\n", i);
+		}
+	}
+
+	success(" - Both (%d) CAs match\n\n", TOTAL_CAS);
+
+	*pcert_length = 0;
+	*pkey = NULL;
+	*pcert = NULL;
+
+	return 0;
+}
+
+static void start(const char *prio)
+{
+	int exit_code = EXIT_SUCCESS;
+	int ret;
+	/* Server stuff. */
+	gnutls_certificate_credentials_t serverx509cred;
+	gnutls_session_t server;
+	int sret = GNUTLS_E_AGAIN;
+	/* Client stuff. */
+	gnutls_certificate_credentials_t clientx509cred;
+	gnutls_session_t client;
+	int cret = GNUTLS_E_AGAIN;
+
+	success("testing %s\n", prio);
+
+	/* General init. */
+	global_init();
+	gnutls_global_set_log_function(tls_log_func);
+	if (debug)
+		gnutls_global_set_log_level(2);
+
+	/* Init server */
+	gnutls_certificate_allocate_credentials(&serverx509cred);
+
+	assert(gnutls_certificate_set_x509_key_mem(serverx509cred, &server_cert, &server_key, GNUTLS_X509_FMT_PEM) >= 0);
+
+	assert(gnutls_certificate_set_x509_trust_mem(serverx509cred, CA1_PTR, GNUTLS_X509_FMT_PEM) >= 0);
+	assert(gnutls_certificate_set_x509_trust_mem(serverx509cred, CA2_PTR, GNUTLS_X509_FMT_PEM) >= 0);
+
+	gnutls_init(&server, GNUTLS_SERVER);
+	gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE, serverx509cred);
+	assert(gnutls_priority_set_direct(server,
+				   prio, NULL) >= 0);
+	gnutls_transport_set_push_function(server, server_push);
+	gnutls_transport_set_pull_function(server, server_pull);
+	gnutls_transport_set_ptr(server, server);
+	gnutls_certificate_server_set_request(server, GNUTLS_CERT_REQUEST);
+
+	/* Init client */
+	/* Init client */
+	ret = gnutls_certificate_allocate_credentials(&clientx509cred);
+	if (ret < 0)
+		exit(1);
+
+	ret =
+	    gnutls_certificate_set_x509_trust_mem(clientx509cred, &ca3_cert,
+						  GNUTLS_X509_FMT_PEM);
+	if (ret < 0)
+		exit(1);
+
+	gnutls_certificate_set_retrieve_function2(clientx509cred,
+						  cert_callback);
+
+	ret = gnutls_init(&client, GNUTLS_CLIENT);
+	if (ret < 0)
+		exit(1);
+
+	ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,
+				     clientx509cred);
+	if (ret < 0)
+		exit(1);
+
+	assert(gnutls_priority_set_direct(client, prio, NULL)>=0);
+	gnutls_transport_set_push_function(client, client_push);
+	gnutls_transport_set_pull_function(client, client_pull);
+	gnutls_transport_set_ptr(client, client);
+
+	HANDSHAKE(client, server);
+
+	gnutls_bye(client, GNUTLS_SHUT_RDWR);
+	gnutls_bye(server, GNUTLS_SHUT_RDWR);
+
+	gnutls_deinit(client);
+	gnutls_deinit(server);
+
+	gnutls_certificate_free_credentials(serverx509cred);
+	gnutls_certificate_free_credentials(clientx509cred);
+
+	gnutls_global_deinit();
+
+	if (debug > 0) {
+		if (exit_code == 0)
+			puts("Self-test successful");
+		else
+			puts("Self-test failed");
+	}
+
+	reset_buffers();
+}
+
+static void find_dn(const gnutls_datum_t *cert, gnutls_datum_t *dn)
+{
+	gnutls_x509_crt_t crt;
+
+	assert(gnutls_x509_crt_init(&crt)>=0);
+	assert(gnutls_x509_crt_import(crt, cert, GNUTLS_X509_FMT_PEM) >= 0);
+	assert(gnutls_x509_crt_get_raw_dn(crt, dn) >= 0);
+	gnutls_x509_crt_deinit(crt);
+}
+
+void doit(void)
+{
+	find_dn(CA1_PTR, &ca_dn[0]);
+	find_dn(CA2_PTR, &ca_dn[1]);
+	start("NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3");
+	start("NORMAL:-VERS-TLS-ALL:+VERS-TLS1.2");
+	gnutls_free(ca_dn[0].data);
+	gnutls_free(ca_dn[1].data);
+}