1 files changed, 343 insertions, 0 deletions
diff --git a/tests/mini-dtls-srtp.c b/tests/mini-dtls-srtp.c
new file mode 100644
index 0000000..1d40d73
--- /dev/null
+++ b/tests/mini-dtls-srtp.c
@@ -0,0 +1,343 @@
+/*
+ * Copyright (C) 2012 Free Software Foundation, 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 General Public License
+ * along with GnuTLS; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if defined(_WIN32) || !defined(ENABLE_DTLS_SRTP)
+
+int main(int argc, char **argv)
+{
+	exit(77);
+}
+
+#else
+
+#include <string.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 <signal.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/dtls.h>
+
+#include "utils.h"
+
+static void terminate(void);
+
+/* This program tests the rehandshake in DTLS
+ */
+
+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);
+}
+
+/* These are global */
+static pid_t child;
+
+#define MAX_KEY_MATERIAL 64*4
+/* A very basic DTLS client, with anonymous authentication, that negotiates SRTP
+ */
+
+static void client(int fd, int profile)
+{
+	gnutls_session_t session;
+	int ret;
+	gnutls_anon_client_credentials_t anoncred;
+	uint8_t km[MAX_KEY_MATERIAL];
+	char buf[2 * MAX_KEY_MATERIAL];
+	gnutls_datum_t cli_key, cli_salt, server_key, server_salt;
+	/* Need to enable anonymous KX specifically. */
+
+	global_init();
+
+	if (debug) {
+		gnutls_global_set_log_function(client_log_func);
+		gnutls_global_set_log_level(4711);
+	}
+
+	gnutls_anon_allocate_client_credentials(&anoncred);
+
+	/* Initialize TLS session
+	 */
+	gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_DATAGRAM);
+	gnutls_heartbeat_enable(session, GNUTLS_HB_PEER_ALLOWED_TO_SEND);
+	gnutls_dtls_set_mtu(session, 1500);
+
+	/* Use default priorities */
+	gnutls_priority_set_direct(session,
+				   "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
+				   NULL);
+	if (profile)
+		ret =
+		    gnutls_srtp_set_profile_direct(session,
+						   "SRTP_AES128_CM_HMAC_SHA1_80",
+						   NULL);
+	else
+		ret =
+		    gnutls_srtp_set_profile_direct(session,
+						   "SRTP_NULL_HMAC_SHA1_80",
+						   NULL);
+	if (ret < 0) {
+		gnutls_perror(ret);
+		exit(1);
+	}
+
+
+	/* put the anonymous credentials to the current session
+	 */
+	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+
+	gnutls_transport_set_int(session, fd);
+
+	/* Perform the TLS handshake
+	 */
+	do {
+		ret = gnutls_handshake(session);
+	}
+	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+	if (ret < 0) {
+		fail("client: Handshake failed\n");
+		gnutls_perror(ret);
+		exit(1);
+	} else {
+		if (debug)
+			success("client: Handshake was completed\n");
+	}
+
+	if (debug)
+		success("client: DTLS version is: %s\n",
+			gnutls_protocol_get_name
+			(gnutls_protocol_get_version(session)));
+
+	ret =
+	    gnutls_srtp_get_keys(session, km, sizeof(km), &cli_key,
+				 &cli_salt, &server_key, &server_salt);
+	if (ret < 0) {
+		gnutls_perror(ret);
+		exit(1);
+	}
+
+	if (debug) {
+		size_t size = sizeof(buf);
+		gnutls_hex_encode(&cli_key, buf, &size);
+		success("Client key: %s\n", buf);
+
+		size = sizeof(buf);
+		gnutls_hex_encode(&cli_salt, buf, &size);
+		success("Client salt: %s\n", buf);
+
+		size = sizeof(buf);
+		gnutls_hex_encode(&server_key, buf, &size);
+		success("Server key: %s\n", buf);
+
+		size = sizeof(buf);
+		gnutls_hex_encode(&server_salt, buf, &size);
+		success("Server salt: %s\n", buf);
+	}
+
+
+	gnutls_bye(session, GNUTLS_SHUT_WR);
+
+	close(fd);
+
+	gnutls_deinit(session);
+
+	gnutls_anon_free_client_credentials(anoncred);
+
+	gnutls_global_deinit();
+}
+
+static void terminate(void)
+{
+	int status;
+	assert(child);
+	kill(child, SIGTERM);
+	wait(&status);
+	exit(1);
+}
+
+static void server(int fd, int profile)
+{
+	int ret;
+	gnutls_session_t session;
+	gnutls_anon_server_credentials_t anoncred;
+	uint8_t km[MAX_KEY_MATERIAL];
+	char buf[2 * MAX_KEY_MATERIAL];
+	gnutls_datum_t cli_key, cli_salt, server_key, server_salt;
+
+	/* this must be called once in the program
+	 */
+	global_init();
+
+	if (debug) {
+		gnutls_global_set_log_function(server_log_func);
+		gnutls_global_set_log_level(4711);
+	}
+
+	gnutls_anon_allocate_server_credentials(&anoncred);
+
+	gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM);
+	gnutls_heartbeat_enable(session, GNUTLS_HB_PEER_ALLOWED_TO_SEND);
+	gnutls_dtls_set_mtu(session, 1500);
+
+	/* avoid calling all the priority functions, since the defaults
+	 * are adequate.
+	 */
+	gnutls_priority_set_direct(session,
+				   "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
+				   NULL);
+
+	if (profile)
+		ret =
+		    gnutls_srtp_set_profile_direct(session,
+						   "SRTP_AES128_CM_HMAC_SHA1_80",
+						   NULL);
+	else
+		ret =
+		    gnutls_srtp_set_profile_direct(session,
+						   "SRTP_NULL_HMAC_SHA1_80",
+						   NULL);
+	if (ret < 0) {
+		gnutls_perror(ret);
+		exit(1);
+	}
+
+	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+
+	gnutls_transport_set_int(session, fd);
+
+	do {
+		ret = gnutls_handshake(session);
+	}
+	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+	if (ret < 0) {
+		close(fd);
+		gnutls_deinit(session);
+		fail("server: Handshake has failed (%s)\n\n",
+		     gnutls_strerror(ret));
+		terminate();
+	}
+	if (debug)
+		success("server: Handshake was completed\n");
+
+	if (debug)
+		success("server: TLS version is: %s\n",
+			gnutls_protocol_get_name
+			(gnutls_protocol_get_version(session)));
+
+	ret =
+	    gnutls_srtp_get_keys(session, km, sizeof(km), &cli_key,
+				 &cli_salt, &server_key, &server_salt);
+	if (ret < 0) {
+		gnutls_perror(ret);
+		exit(1);
+	}
+
+	if (debug) {
+		size_t size = sizeof(buf);
+		gnutls_hex_encode(&cli_key, buf, &size);
+		success("Client key: %s\n", buf);
+
+		size = sizeof(buf);
+		gnutls_hex_encode(&cli_salt, buf, &size);
+		success("Client salt: %s\n", buf);
+
+		size = sizeof(buf);
+		gnutls_hex_encode(&server_key, buf, &size);
+		success("Server key: %s\n", buf);
+
+		size = sizeof(buf);
+		gnutls_hex_encode(&server_salt, buf, &size);
+		success("Server salt: %s\n", buf);
+	}
+
+	/* do not wait for the peer to close the connection.
+	 */
+	gnutls_bye(session, GNUTLS_SHUT_WR);
+
+	close(fd);
+	gnutls_deinit(session);
+
+	gnutls_anon_free_server_credentials(anoncred);
+
+	gnutls_global_deinit();
+
+	if (debug)
+		success("server: finished\n");
+}
+
+static void start(int profile)
+{
+	int fd[2];
+	int ret;
+
+	signal(SIGPIPE, SIG_IGN);
+
+	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) {
+		int status;
+		/* parent */
+
+		server(fd[0], profile);
+		wait(&status);
+		check_wait_status(status);
+	} else {
+		close(fd[0]);
+		client(fd[1], profile);
+		exit(0);
+	}
+}
+
+void doit(void)
+{
+	start(0);
+	start(1);
+}
+
+#endif				/* _WIN32 */