1 files changed, 288 insertions, 0 deletions
diff --git a/tests/tls-ext-not-in-dtls.c b/tests/tls-ext-not-in-dtls.c
new file mode 100644
index 0000000000..1bbf2e2887
--- /dev/null
+++ b/tests/tls-ext-not-in-dtls.c
@@ -0,0 +1,288 @@
+/*
+ * Copyright (C) 2017-2018 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>
+
+#if defined(_WIN32)
+
+int main()
+{
+	exit(77);
+}
+
+#else
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/dtls.h>
+#include <signal.h>
+#include <string.h>
+#include <assert.h>
+
+#include "utils.h"
+#include "cert-common.h"
+
+enum {
+TEST_DEF_HANDHAKE,
+TEST_CUSTOM_EXT
+};
+
+/* This program tests whether the Post Handshake Auth extension is
+ * present in the client hello, and whether it is missing from server
+ * hello. In addition it contains basic functionality test for
+ * post handshake authentication.
+ */
+
+static void server_log_func(int level, const char *str)
+{
+	fprintf(stderr, "server|<%d>| %s", level, str);
+}
+
+static void client_log_func(int level, const char *str)
+{
+	fprintf(stderr, "client|<%d>| %s", level, str);
+}
+
+static int ext_send(gnutls_session_t session, gnutls_buffer_t extdata)
+{
+	gnutls_buffer_append_data(extdata, "\xff", 1);
+	return 0;
+}
+
+static int ext_recv(gnutls_session_t session, const unsigned char *buf, size_t buflen)
+{
+	return 0;
+}
+
+#define TLS_EXT_IMPL_DTLS 0xfeee
+#define TLS_EXT_EXPL_TLS 0xfeea
+
+static void client(int fd, int type)
+{
+	int ret;
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_session_t session;
+
+	assert(gnutls_global_init() >= 0);
+
+	gnutls_global_set_log_function(client_log_func);
+
+	assert(gnutls_certificate_allocate_credentials(&x509_cred) >= 0);
+
+	assert(gnutls_init(&session, GNUTLS_CLIENT|GNUTLS_DATAGRAM) >= 0);
+
+	if (type == TEST_CUSTOM_EXT) {
+		assert(gnutls_session_ext_register(session, "implicit-dtls", TLS_EXT_IMPL_DTLS, GNUTLS_EXT_TLS, ext_recv, ext_send, NULL, NULL, NULL, GNUTLS_EXT_FLAG_CLIENT_HELLO|GNUTLS_EXT_FLAG_TLS12_SERVER_HELLO|GNUTLS_EXT_FLAG_TLS13_SERVER_HELLO)>=0);
+		assert(gnutls_session_ext_register(session, "explicit-tls", TLS_EXT_EXPL_TLS, GNUTLS_EXT_TLS, ext_recv, ext_send, NULL, NULL, NULL, GNUTLS_EXT_FLAG_CLIENT_HELLO|GNUTLS_EXT_FLAG_TLS12_SERVER_HELLO|GNUTLS_EXT_FLAG_TLS13_SERVER_HELLO|GNUTLS_EXT_FLAG_TLS)>=0);
+	}
+
+	gnutls_handshake_set_timeout(session, 20 * 1000);
+
+	assert(gnutls_priority_set_direct(session, "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3:+VERS-TLS1.2:+VERS-TLS1.0", NULL) >= 0);
+
+	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+	gnutls_transport_set_int(session, fd);
+
+	do {
+		ret = gnutls_handshake(session);
+	}
+	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+	if (ret < 0)
+		fail("handshake: %s\n", gnutls_strerror(ret));
+
+	close(fd);
+
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+}
+
+#define TLS_EXT_KEY_SHARE 51
+#define TLS_EXT_POST_HANDSHAKE 49
+
+struct ext_ctx_st {
+	int extno;
+	int found;
+};
+
+static int parse_ext(void *ctx, unsigned tls_id, const unsigned char *data, unsigned data_size)
+{
+	struct ext_ctx_st *s = ctx;
+
+	if (s->extno == (int)tls_id)
+		s->found = 1;
+
+	return 0;
+}
+
+static unsigned find_client_extension(const gnutls_datum_t *msg, int extno)
+{
+	int ret;
+	struct ext_ctx_st s;
+
+	memset(&s, 0, sizeof(s));
+	s.extno = extno;
+
+	ret = gnutls_ext_raw_parse(&s, parse_ext, msg, GNUTLS_EXT_RAW_FLAG_DTLS_CLIENT_HELLO);
+	assert(ret>=0);
+
+	if (s.found)
+		return 1;
+
+	return 0;
+}
+
+static int hellos_callback(gnutls_session_t session, unsigned int htype,
+	unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
+{
+	int *type;
+
+	if (htype != GNUTLS_HANDSHAKE_CLIENT_HELLO || post != GNUTLS_HOOK_PRE)
+		return 0;
+
+	type = gnutls_session_get_ptr(session);
+
+	if (find_client_extension(msg, TLS_EXT_KEY_SHARE))
+		fail("Key share extension seen in client hello!\n");
+
+	if (find_client_extension(msg, TLS_EXT_POST_HANDSHAKE))
+		fail("Key share extension seen in client hello!\n");
+
+	if (*type == TEST_CUSTOM_EXT) {
+		if (!find_client_extension(msg, TLS_EXT_IMPL_DTLS))
+			fail("Implicit DTLS extension not seen in client hello!\n");
+
+		if (find_client_extension(msg, TLS_EXT_EXPL_TLS))
+			fail("Explicit TLS extension seen in client hello!\n");
+	}
+
+	return 0;
+}
+
+static void server(int fd, int type)
+{
+	int ret;
+	gnutls_session_t session;
+	gnutls_certificate_credentials_t x509_cred;
+
+	assert(gnutls_global_init() >= 0);
+
+	gnutls_global_set_log_function(server_log_func);
+
+	assert(gnutls_certificate_allocate_credentials(&x509_cred) >= 0);
+	assert(gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,
+					    &server_key,
+					    GNUTLS_X509_FMT_PEM) >= 0);
+
+	assert(gnutls_init(&session, GNUTLS_SERVER|GNUTLS_POST_HANDSHAKE_AUTH|GNUTLS_DATAGRAM) >= 0);
+
+	gnutls_handshake_set_timeout(session, 20 * 1000);
+	gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_ANY,
+					   GNUTLS_HOOK_BOTH,
+					   hellos_callback);
+
+	gnutls_session_set_ptr(session, &type);
+	assert(gnutls_priority_set_direct(session, "NORMAL:-VERS-TLS-ALL:+VERS-TLS1.3:+VERS-TLS1.2", NULL) >= 0);
+
+	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+	gnutls_transport_set_int(session, fd);
+
+	do {
+		ret = gnutls_handshake(session);
+	} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+	if (ret != 0)
+		fail("handshake failed: %s\n", gnutls_strerror(ret));
+
+	close(fd);
+	gnutls_deinit(session);
+
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+}
+
+static void ch_handler(int sig)
+{
+	int status;
+	wait(&status);
+	check_wait_status(status);
+	return;
+}
+
+static
+void start(const char *name, int type)
+{
+	int fd[2];
+	int ret;
+	pid_t child;
+
+	signal(SIGCHLD, ch_handler);
+	success("%s\n", name);
+
+	ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
+	if (ret < 0) {
+		perror("socketpair");
+		exit(1);
+	}
+
+	child = fork();
+	if (child < 0) {
+		perror("fork");
+		fail("fork");
+		exit(1);
+	}
+
+	if (child) {
+		/* parent */
+		close(fd[1]);
+		server(fd[0], type);
+		kill(child, SIGTERM);
+	} else {
+		close(fd[0]);
+		client(fd[1], type);
+		exit(0);
+	}
+
+}
+
+void doit(void) {
+	start("check default extensions", TEST_DEF_HANDHAKE);
+	start("check registered extensions", TEST_CUSTOM_EXT);
+}
+
+#endif				/* _WIN32 */