--- /dev/null
+/*
+ * Copyright (C) 2013-2015 Nikos Mavrogiannopoulos
+ * Copyright (C) 2015 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 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>
+
+/* This checks the proper behavior of the client when
+ * invalid data are sent by the server in the hello verify
+ * request.
+ */
+
+#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 <sys/select.h>
+#include <errno.h>
+#include <signal.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/dtls.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;
+ 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, 20 * 1000);
+
+ /* 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) {
+ success("client: Handshake failed\n");
+ gnutls_perror(ret);
+ goto exit;
+ } else {
+ fail("client: Handshake completed?\n");
+ pause();
+ }
+
+ exit:
+ gnutls_deinit(session);
+
+ gnutls_anon_free_client_credentials(anoncred);
+
+ gnutls_global_deinit();
+}
+
+
+/* These are global */
+pid_t child;
+
+static void terminate(void)
+{
+ int status;
+
+ kill(child, SIGTERM);
+ wait(&status);
+ exit(1);
+}
+
+#define CLI_ADDR (void*)"test"
+#define CLI_ADDR_LEN 4
+
+static
+ssize_t recv_timeout(int sockfd, void *buf, size_t len, unsigned flags, unsigned sec)
+{
+int ret;
+struct timeval tv;
+fd_set set;
+
+ tv.tv_sec = sec;
+ tv.tv_usec = 0;
+
+ FD_ZERO(&set);
+ FD_SET(sockfd, &set);
+
+ do {
+ ret = select(sockfd + 1, &set, NULL, NULL, &tv);
+ } while (ret == -1 && errno == EINTR);
+
+ if (ret == -1 || ret == 0) {
+ errno = ETIMEDOUT;
+ return -1;
+ }
+
+ return recv(sockfd, buf, len, flags);
+}
+
+#define SERV_TIMEOUT 30
+
+static void server(int fd)
+{
+ int ret, csend = 0, status;
+ 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;
+ unsigned try = 0;
+
+ /* 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, SERV_TIMEOUT * 1000);
+ 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_timeout(fd, buffer, sizeof(buffer), MSG_PEEK, SERV_TIMEOUT);
+ if (ret < 0) {
+ if (try != 0) {
+ unsigned counter = 0;
+ do {
+ sleep(1);
+ counter++;
+ if (counter >= 15) {
+ fail("Child was blocked indefinitely!\n");
+ exit(1);
+ }
+ } while(waitpid(child, &status, WNOHANG) == 0);
+ success("Child was terminated as expected!\n");
+ goto exit;
+ } else {
+ fail("Error receiving first message\n");
+ exit(1);
+ }
+ }
+ try++;
+
+ memset(&prestate, 0, sizeof(prestate));
+ prestate.record_seq = 105791312;
+ prestate.hsk_write_seq = 67166359;
+ 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_timeout(fd, buffer, sizeof(buffer), 0, SERV_TIMEOUT);
+ csend++;
+
+ if (csend > 2) {
+ fail("too many cookies sent\n");
+ terminate();
+ }
+
+ continue;
+ }
+
+ /* success */
+ break;
+ }
+
+ fail("Shouldn't have reached here\n");
+ exit:
+ gnutls_deinit(session);
+
+ gnutls_anon_free_server_credentials(anoncred);
+
+ gnutls_global_deinit();
+}
+
+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);
+ if (WEXITSTATUS(status) != 0)
+ fail("Child died with status %d\n",
+ WEXITSTATUS(status));
+ } else {
+ close(fd[0]);
+ client(fd[1]);
+ exit(0);
+ }
+}
+
+#endif /* _WIN32 */
projects / thirdparty / gnutls.git / commitdiff
