tests: added checks for special signature algorithms

This tests the behavior when signature algorithms only available
under TLS1.3 are present in a TLS 1.2 session.

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

2 files changed, 181 insertions, 1 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index ab8d75f2e0..65b7ab38ed 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -119,7 +119,7 @@ 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 \
+	 client-sign-md5-rep tls12-invalid-key-exchanges \
 	 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 \
 	 status-request status-request-ok status-request-missing sign-verify-ext \
diff --git a/tests/tls12-invalid-key-exchanges.c b/tests/tls12-invalid-key-exchanges.c
new file mode 100644
index 0000000000..d724bc136c
--- /dev/null
+++ b/tests/tls12-invalid-key-exchanges.c
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2015-2017 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
+
+/* This program tests the various certificate key exchange methods supported
+ * in gnutls */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <gnutls/gnutls.h>
+#include "utils.h"
+#include "eagain-common.h"
+#include "cert-common.h"
+
+#define USE_CERT 1
+#define ASK_CERT 2
+
+static void tls_log_func(int level, const char *str)
+{
+	fprintf(stderr, "%s|<%d>| %s", side, level, str);
+}
+
+static
+void try_with_key(const char *name,
+		const char *server_prio,
+		const char *client_prio,
+		const gnutls_datum_t *serv_cert,
+		const gnutls_datum_t *serv_key,
+		const gnutls_datum_t *client_cert,
+		const gnutls_datum_t *client_key,
+		unsigned cert_flags,
+		int exp_error_server,
+		int exp_error_client)
+{
+	int ret;
+	/* Server stuff. */
+	gnutls_certificate_credentials_t serverx509cred;
+	gnutls_anon_server_credentials_t s_anoncred;
+	gnutls_dh_params_t dh_params;
+	const gnutls_datum_t p3 =
+	    { (unsigned char *) pkcs3, strlen(pkcs3) };
+	gnutls_session_t server;
+	int sret = GNUTLS_E_AGAIN;
+	/* Client stuff. */
+	gnutls_certificate_credentials_t clientx509cred;
+	gnutls_anon_client_credentials_t c_anoncred;
+	gnutls_session_t client;
+	int cret = GNUTLS_E_AGAIN;
+	const char *err;
+
+	reset_buffers();
+	/* Init server */
+	gnutls_anon_allocate_server_credentials(&s_anoncred);
+	gnutls_certificate_allocate_credentials(&serverx509cred);
+
+	ret = gnutls_certificate_set_x509_key_mem(serverx509cred,
+					    serv_cert, serv_key,
+					    GNUTLS_X509_FMT_PEM);
+	if (ret < 0) {
+		fail("Could not set key/cert: %s\n", gnutls_strerror(ret));
+	}
+
+	gnutls_dh_params_init(&dh_params);
+	gnutls_dh_params_import_pkcs3(dh_params, &p3, GNUTLS_X509_FMT_PEM);
+	gnutls_certificate_set_dh_params(serverx509cred, dh_params);
+	gnutls_anon_set_server_dh_params(s_anoncred, dh_params);
+
+	gnutls_init(&server, GNUTLS_SERVER);
+	gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE,
+				serverx509cred);
+	gnutls_credentials_set(server, GNUTLS_CRD_ANON, s_anoncred);
+
+	ret = gnutls_priority_set_direct(server, server_prio, &err);
+	if (ret < 0) {
+		if (ret == GNUTLS_E_INVALID_REQUEST)
+			fprintf(stderr, "Error in server: %s\n", err);
+		exit(1);
+	}
+
+	gnutls_transport_set_push_function(server, server_push);
+	gnutls_transport_set_pull_function(server, server_pull);
+	gnutls_transport_set_ptr(server, server);
+
+	/* Init client */
+
+	ret = gnutls_certificate_allocate_credentials(&clientx509cred);
+	if (ret < 0)
+		exit(1);
+
+	if (cert_flags == USE_CERT) {
+		gnutls_certificate_set_x509_key_mem(clientx509cred,
+						    client_cert, client_key,
+						    GNUTLS_X509_FMT_PEM);
+		gnutls_certificate_server_set_request(server, GNUTLS_CERT_REQUIRE);
+	} else if (cert_flags == ASK_CERT) {
+		gnutls_certificate_server_set_request(server, GNUTLS_CERT_REQUEST);
+	}
+
+#if 0
+	ret = gnutls_certificate_set_x509_trust_mem(clientx509cred, &ca_cert, GNUTLS_X509_FMT_PEM);
+	if (ret < 0)
+		exit(1);
+#endif
+	ret = gnutls_init(&client, GNUTLS_CLIENT);
+	if (ret < 0)
+		exit(1);
+
+	gnutls_anon_allocate_client_credentials(&c_anoncred);
+	gnutls_credentials_set(client, GNUTLS_CRD_ANON, c_anoncred);
+	ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,
+				clientx509cred);
+	if (ret < 0)
+		exit(1);
+
+	gnutls_transport_set_push_function(client, client_push);
+	gnutls_transport_set_pull_function(client, client_pull);
+	gnutls_transport_set_ptr(client, client);
+
+	ret = gnutls_priority_set_direct(client, client_prio, &err);
+	if (ret < 0) {
+		if (ret == GNUTLS_E_INVALID_REQUEST)
+			fprintf(stderr, "Error in %s\n", err);
+		exit(1);
+	}
+	success("negotiating %s\n", name);
+	HANDSHAKE_EXPECT(client, server, exp_error_client, exp_error_server);
+
+	gnutls_deinit(client);
+	gnutls_deinit(server);
+
+	gnutls_certificate_free_credentials(serverx509cred);
+	gnutls_certificate_free_credentials(clientx509cred);
+	gnutls_anon_free_server_credentials(s_anoncred);
+	gnutls_anon_free_client_credentials(c_anoncred);
+	gnutls_dh_params_deinit(dh_params);
+}
+
+void doit(void)
+{
+	global_init();
+
+	gnutls_global_set_log_function(tls_log_func);
+	if (debug)
+		gnutls_global_set_log_level(6);
+
+	/* check compatibility and handling of SIGN-ECDSA-SECP256R1-SHA256 which
+	 * is available under TLS1.3 but not TLS1.2 */
+	try_with_key("TLS 1.2 with ecdhe ecdsa with ECDSA-SECP256R1-SHA256",
+		NULL, "NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+ECDHE-ECDSA:-SIGN-ALL:+SIGN-ECDSA-SECP256R1-SHA256:+SIGN-ECDSA-SECP384R1-SHA384:+SIGN-ECDSA-SECP521R1-SHA512:+SIGN-RSA-SHA256",
+		&server_ca3_localhost_ecc_cert, &server_ca3_ecc_key, NULL, NULL, 0, GNUTLS_E_NO_CIPHER_SUITES, GNUTLS_E_AGAIN);
+
+	try_with_key("TLS 1.2 with ecdhe ecdsa with ECDSA-SHA256",
+		NULL, "NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+ECDHE-ECDSA:-SIGN-ALL:+SIGN-ECDSA-SHA256:+SIGN-RSA-SHA256",
+		&server_ca3_localhost_ecc_cert, &server_ca3_ecc_key, NULL, NULL, 0, 0, 0);
+
+	gnutls_global_deinit();
+}