--- /dev/null
+/*
+ * Copyright (C) 2017-2020 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 <https://www.gnu.org/licenses/>
+ */
+
+/* This program tests whether the second DTLS client hello contains the same
+ * random value, and whether it is initialized.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if defined(_WIN32)
+
+/* socketpair isn't supported on Win32. */
+int main(int argc, char **argv)
+{
+ exit(77);
+}
+
+#else
+
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#if !defined(_WIN32)
+#include <sys/wait.h>
+#include <signal.h>
+#endif
+#include <unistd.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/dtls.h>
+#include <assert.h>
+
+#include "utils.h"
+#include "cert-common.h"
+
+const char *side = "";
+
+static void tls_log_func(int level, const char *str)
+{
+ fprintf(stderr, "%s|<%d>| %s", side, level, str);
+}
+
+unsigned char crandom[32];
+static unsigned cb_called = 0;
+
+static int hello_callback(gnutls_session_t session, unsigned int htype,
+ unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
+{
+ unsigned non_zero = 0, i;
+
+ if (htype == GNUTLS_HANDSHAKE_CLIENT_HELLO && post == GNUTLS_HOOK_POST) {
+ if (cb_called == 0) {
+ /* save first value */
+ gnutls_datum_t tmp;
+ gnutls_session_get_random(session, &tmp, NULL);
+ assert(tmp.size == 32);
+
+ memcpy(crandom, tmp.data, tmp.size);
+ cb_called++;
+
+ /* check if uninitialized */
+ for (i=0;i<32;i++) {
+ if (crandom[i] != 0) {
+ non_zero++;
+ }
+ }
+
+ if (non_zero <= 8) {
+ fail("the client random value seems uninitialized\n");
+ }
+ } else { /* verify it is the same */
+ gnutls_datum_t tmp;
+ gnutls_session_get_random(session, &tmp, NULL);
+
+ assert(tmp.size == 32);
+ if (memcmp(tmp.data, crandom, tmp.size) != 0) {
+ fail("the random values differ!\n");
+ }
+ cb_called++;
+ }
+ } if (htype == GNUTLS_HANDSHAKE_SERVER_HELLO && post == GNUTLS_HOOK_POST) {
+ gnutls_datum_t tmp;
+ gnutls_session_get_random(session, NULL, &tmp);
+ assert(tmp.size == 32);
+
+ for (i=0;i<32;i++) {
+ if (tmp.data[i] != 0) {
+ non_zero++;
+ }
+ }
+ if (non_zero <= 8) {
+ fail("the server random value seems uninitialized\n");
+ }
+ }
+
+ return 0;
+}
+
+static void client(int sd, const char *priority)
+{
+ int ret;
+ gnutls_session_t session;
+ gnutls_certificate_credentials_t clientx509cred;
+
+ gnutls_global_set_log_function(tls_log_func);
+ if (debug)
+ gnutls_global_set_log_level(4711);
+
+ side = "client";
+
+ gnutls_certificate_allocate_credentials(&clientx509cred);
+
+ assert(gnutls_init(&session, GNUTLS_CLIENT|GNUTLS_DATAGRAM)>=0);
+
+ if (!priority) {
+ assert(gnutls_set_default_priority(session) >= 0);
+ } else {
+ assert(gnutls_priority_set_direct(session, priority, NULL) >= 0);
+ }
+
+ gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
+ clientx509cred);
+
+ gnutls_transport_set_int(session, sd);
+ gnutls_dtls_set_mtu(session, 1500);
+ gnutls_handshake_set_timeout(session, 20 * 1000);
+
+ gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_ANY,
+ GNUTLS_HOOK_BOTH, hello_callback);
+
+ ret = gnutls_handshake(session);
+
+ if (ret < 0) {
+ fail("client: Handshake failed: %s\n", gnutls_strerror(ret));
+ } else {
+ if (debug)
+ success("client: Handshake was completed\n");
+ }
+
+ if (cb_called != 2) {
+ fail("client: the callback was not seen twice!\n");
+ }
+
+ gnutls_bye(session, GNUTLS_SHUT_WR);
+ close(sd);
+
+ gnutls_deinit(session);
+
+ gnutls_certificate_free_credentials(clientx509cred);
+}
+
+#define MAX_BUF 1024
+#define CLI_ADDR (void*)"test"
+#define CLI_ADDR_LEN 4
+
+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 server(int sd, const char *priority)
+{
+ int ret, csend = 0;
+ char buffer[MAX_BUF + 1];
+ gnutls_certificate_credentials_t serverx509cred;
+ gnutls_dtls_prestate_st prestate;
+ gnutls_session_t session;
+ gnutls_datum_t cookie_key;
+
+ gnutls_global_set_log_function(tls_log_func);
+ if (debug)
+ gnutls_global_set_log_level(4711);
+
+ side = "server";
+
+ ret = gnutls_key_generate(&cookie_key, GNUTLS_COOKIE_KEY_SIZE);
+ if (ret < 0) {
+ fail("Cannot generate key: %s\n", gnutls_strerror(ret));
+ }
+
+ for (;;) {
+ ret = recv(sd, buffer, sizeof(buffer), MSG_PEEK);
+ if (ret < 0) {
+ fail("Cannot receive data\n");
+ }
+
+ 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) sd, push);
+ if (ret < 0) {
+ fail("Cannot send data\n");
+ }
+
+ /* discard peeked data */
+ recv(sd, buffer, sizeof(buffer), 0);
+ csend++;
+
+ if (csend > 2) {
+ fail("too many cookies sent\n");
+ }
+
+ continue;
+ }
+
+ /* success */
+ break;
+ }
+
+ assert(gnutls_certificate_allocate_credentials(&serverx509cred)>=0);
+ assert(gnutls_certificate_set_x509_key_mem(serverx509cred,
+ &server_cert, &server_key,
+ GNUTLS_X509_FMT_PEM)>=0);
+
+ assert(gnutls_init(&session, GNUTLS_SERVER|GNUTLS_DATAGRAM)>=0);
+ assert(session != NULL);
+
+ if (!priority) {
+ assert(gnutls_set_default_priority(session) >= 0);
+ } else {
+ assert(gnutls_priority_set_direct(session, priority, NULL) >= 0);
+ }
+
+ gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
+ serverx509cred);
+
+ gnutls_transport_set_int(session, sd);
+ gnutls_handshake_set_timeout(session, 20 * 1000);
+ gnutls_dtls_set_mtu(session, 1500);
+
+ gnutls_dtls_prestate_set(session, &prestate);
+
+ ret = gnutls_handshake(session);
+ if (ret < 0) {
+ fail("server: Handshake has failed: %s\n\n",
+ gnutls_strerror(ret));
+ }
+ if (debug)
+ success("server: Handshake was completed\n");
+
+ /* do not wait for the peer to close the connection.
+ */
+ gnutls_bye(session, GNUTLS_SHUT_WR);
+ close(sd);
+ gnutls_deinit(session);
+
+ gnutls_certificate_free_credentials(serverx509cred);
+ gnutls_free(cookie_key.data);
+
+ if (debug)
+ success("server: finished\n");
+}
+
+static void start(const char *name, const char *priority)
+{
+ pid_t child;
+ int sockets[2];
+ int err;
+
+ success("testing: %s\n", name);
+ cb_called = 0;
+
+ err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
+ if (err == -1) {
+ perror("socketpair");
+ fail("socketpair failed\n");
+ return;
+ }
+
+ child = fork();
+ if (child < 0) {
+ perror("fork");
+ fail("fork");
+ return;
+ }
+
+ if (child) {
+ int status = 0;
+ /* parent */
+ close(sockets[1]);
+ client(sockets[0], priority);
+ wait(&status);
+ check_wait_status(status);
+ } else {
+ close(sockets[0]);
+ server(sockets[1], priority);
+ exit(0);
+ }
+}
+
+void doit(void)
+{
+ signal(SIGPIPE, SIG_IGN);
+
+ start("default", NULL);
+ start("dtls1.2", "NORMAL:-VERS-ALL:+VERS-DTLS1.2");
+ start("dtls1.0", "NORMAL:-VERS-ALL:+VERS-DTLS1.0");
+}
+
+#endif /* _WIN32 */
projects / thirdparty / gnutls.git / commitdiff
