1 files changed, 351 insertions, 0 deletions
diff --git a/tests/mini-dtls-hello-verify.c b/tests/mini-dtls-hello-verify.c
new file mode 100644
index 0000000..8019313
--- /dev/null
+++ b/tests/mini-dtls-hello-verify.c
@@ -0,0 +1,351 @@
+/*
+ * Copyright (C) 2013 Nikos Mavrogiannopoulos
+ *
+ * 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)
+
+int main()
+{
+	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 <gnutls/gnutls.h>
+#include <gnutls/dtls.h>
+#include <signal.h>
+
+#include "utils.h"
+
+static void terminate(void);
+
+/* This program tests the client hello verify 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);
+}
+
+/* A very basic TLS client, with anonymous authentication.
+ */
+
+#define MAX_BUF 1024
+
+static ssize_t
+push(gnutls_transport_ptr_t tr, const void *data, size_t len)
+{
+	int fd = (long int) tr;
+
+	return send(fd, data, len, 0);
+}
+
+static void client(int fd)
+{
+	int ret;
+	char buffer[MAX_BUF + 1];
+	gnutls_anon_client_credentials_t anoncred;
+	gnutls_session_t session;
+	/* 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_dtls_set_mtu(session, 1500);
+	gnutls_handshake_set_timeout(session, get_timeout());
+
+	/* Use default priorities */
+	gnutls_priority_set_direct(session,
+				   "NONE:+VERS-DTLS-ALL:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
+				   NULL);
+
+	/* put the anonymous credentials to the current session
+	 */
+	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+
+	gnutls_transport_set_int(session, fd);
+	gnutls_transport_set_push_function(session, push);
+
+	/* 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: TLS version is: %s\n",
+			gnutls_protocol_get_name
+			(gnutls_protocol_get_version(session)));
+
+	do {
+		ret = gnutls_record_recv(session, buffer, MAX_BUF);
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	if (ret == 0) {
+		if (debug)
+			success
+			    ("client: Peer has closed the TLS connection\n");
+		goto end;
+	} else if (ret < 0) {
+		fail("client: Error: %s\n", gnutls_strerror(ret));
+		exit(1);
+	}
+
+	gnutls_bye(session, GNUTLS_SHUT_WR);
+
+      end:
+
+	close(fd);
+
+	gnutls_deinit(session);
+
+	gnutls_anon_free_client_credentials(anoncred);
+
+	gnutls_global_deinit();
+}
+
+
+/* These are global */
+pid_t child;
+
+static void terminate(void)
+{
+	int status;
+	assert(child);
+	kill(child, SIGTERM);
+	wait(&status);
+	exit(1);
+}
+
+#define CLI_ADDR (void*)"test"
+#define CLI_ADDR_LEN 4
+
+static void server(int fd)
+{
+	int ret, csend = 0;
+	gnutls_anon_server_credentials_t anoncred;
+	char buffer[MAX_BUF + 1];
+	gnutls_datum_t cookie_key;
+	gnutls_dtls_prestate_st prestate;
+	gnutls_session_t session;
+
+	/* 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);
+	}
+
+	ret = gnutls_key_generate(&cookie_key, GNUTLS_COOKIE_KEY_SIZE);
+	if (ret < 0) {
+		fail("Cannot generate key: %s\n", gnutls_strerror(ret));
+		terminate();
+	}
+
+	gnutls_anon_allocate_server_credentials(&anoncred);
+
+	gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM);
+	gnutls_handshake_set_timeout(session, get_timeout());
+	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);
+
+	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+
+	gnutls_transport_set_int(session, fd);
+	gnutls_transport_set_push_function(session, push);
+
+	for (;;) {
+		ret = recv(fd, buffer, sizeof(buffer), MSG_PEEK);
+		if (ret < 0) {
+			fail("Cannot receive data\n");
+			terminate();
+		}
+
+		memset(&prestate, 0, sizeof(prestate));
+		ret =
+		    gnutls_dtls_cookie_verify(&cookie_key, CLI_ADDR,
+					      CLI_ADDR_LEN, buffer, ret,
+					      &prestate);
+		if (ret < 0) {	/* cookie not valid */
+			if (debug)
+				success("Sending hello verify request\n");
+
+			ret =
+			    gnutls_dtls_cookie_send(&cookie_key, CLI_ADDR,
+						    CLI_ADDR_LEN,
+						    &prestate,
+						    (gnutls_transport_ptr_t)
+						    (long) fd, push);
+			if (ret < 0) {
+				fail("Cannot send data\n");
+				terminate();
+			}
+
+			/* discard peeked data */
+			recv(fd, buffer, sizeof(buffer), 0);
+			csend++;
+
+			if (csend > 2) {
+				fail("too many cookies sent\n");
+				terminate();
+			}
+
+			continue;
+		}
+
+		/* success */
+		break;
+	}
+
+	gnutls_dtls_prestate_set(session, &prestate);
+
+	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)));
+
+	/* see the Getting peer's information example */
+	/* print_info(session); */
+
+	do {
+		ret = gnutls_record_send(session, buffer, sizeof(buffer));
+	} while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
+
+	if (ret < 0) {
+		close(fd);
+		gnutls_deinit(session);
+		fail("server: data sending has failed (%s)\n\n",
+		     gnutls_strerror(ret));
+		terminate();
+	}
+
+
+	/* 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_free(cookie_key.data);
+
+	gnutls_global_deinit();
+
+	if (debug)
+		success("server: finished\n");
+}
+
+void doit(void)
+{
+	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]);
+		wait(&status);
+		check_wait_status(status);
+	} else {
+		close(fd[0]);
+		client(fd[1]);
+		exit(0);
+	}
+}
+
+#endif				/* _WIN32 */