tests: added check for MTU calculation on DTLS 1.2

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 03c51be541ef1a10a7934800d2348ffc97a16d8f..50eaf1bee1fbceb17bdaa3ebd2fd0651ceb77cfc 100644 (file)
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -117,7 +117,7 @@ ctests = mini-record-2 simple gc set_pkcs12_cred certder certuniqueid       \
         multi-alerts naked-alerts pkcs7-cat-parse set_known_dh_params_x509 \
         set_known_dh_params_anon set_known_dh_params_psk session-tickets-ok \
         session-tickets-missing set_x509_key_file_legacy status-request-ext \
-        rng-no-onload
+        rng-no-onload dtls1-2-mtu-check
 
 if HAVE_SECCOMP_TESTS
 ctests += dtls-with-seccomp tls-with-seccomp dtls-client-with-seccomp tls-client-with-seccomp

diff --git a/tests/dtls1-2-mtu-check.c b/tests/dtls1-2-mtu-check.c
new file mode 100644 (file)
index 0000000..b2bb739
--- /dev/null
+++ b/tests/dtls1-2-mtu-check.c
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2016 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
+
+/* This program tests the MTU calculation in various cipher/mac algorithm combinations
+ * in gnutls */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/dtls.h>
+#include "eagain-common.h"
+#include "cert-common.h"
+#include "utils.h"
+#include <assert.h>
+
+#define myfail(fmt, ...) \
+       fail("%s: "fmt, name, ##__VA_ARGS__)
+
+static void tls_log_func(int level, const char *str)
+{
+       fprintf(stderr, "|<%d>| %s", level, str);
+}
+
+static void dtls_mtu_try(const char *name, const char *client_prio,
+               unsigned link_mtu, unsigned tunnel_mtu)
+{
+       int ret;
+       /* Server stuff. */
+       gnutls_certificate_credentials_t serverx509cred;
+       gnutls_session_t server;
+       int sret = GNUTLS_E_AGAIN;
+       /* Client stuff. */
+       gnutls_certificate_credentials_t clientx509cred;
+       gnutls_session_t client;
+       int cret = GNUTLS_E_AGAIN;
+       unsigned dmtu;
+       unsigned i;
+
+       /* General init. */
+       gnutls_global_set_log_function(tls_log_func);
+       if (debug)
+               gnutls_global_set_log_level(6);
+
+       reset_buffers();
+       /* Init server */
+       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(&server, GNUTLS_SERVER|GNUTLS_DATAGRAM|GNUTLS_NONBLOCK) >= 0);
+       gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE,
+                               serverx509cred);
+
+       assert(gnutls_priority_set_direct(server,
+                                  "NORMAL:+ANON-ECDH:+ANON-DH:+ECDHE-RSA:+DHE-RSA:+RSA:+ECDHE-ECDSA:+CURVE-X25519",
+                                  NULL) >= 0);
+       gnutls_transport_set_push_function(server, server_push);
+       gnutls_transport_set_pull_function(server, server_pull);
+       gnutls_transport_set_pull_timeout_function(server, server_pull_timeout_func);
+       gnutls_transport_set_ptr(server, server);
+
+       /* Init client */
+
+       ret = gnutls_init(&client, GNUTLS_CLIENT|GNUTLS_DATAGRAM|GNUTLS_NONBLOCK);
+       if (ret < 0)
+               exit(1);
+
+       assert(gnutls_certificate_allocate_credentials(&clientx509cred) >= 0);
+       assert(gnutls_certificate_set_x509_trust_mem(clientx509cred, &ca_cert, GNUTLS_X509_FMT_PEM)>=0);
+
+       assert(gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,
+                               clientx509cred) >= 0);
+
+       gnutls_transport_set_push_function(client, client_push);
+       gnutls_transport_set_pull_function(client, client_pull);
+       gnutls_transport_set_pull_timeout_function(client, client_pull_timeout_func);
+       
+       gnutls_transport_set_ptr(client, client);
+
+       ret = gnutls_priority_set_direct(client, client_prio, NULL);
+       if (ret < 0) {
+               fail("%s: error in priority setting\n", name);
+               exit(1);
+       }
+       success("negotiating %s\n", name);
+       HANDSHAKE_DTLS(client, server);
+
+       gnutls_dtls_set_mtu(client, link_mtu);
+       dmtu = gnutls_dtls_get_data_mtu(client);
+       if (dmtu != tunnel_mtu) {
+               fail("%s: Calculated MTU (%d) does not match expected (%d)\n", name, dmtu, tunnel_mtu);
+       }
+
+       {
+               char msg[dmtu+1];
+               memset(msg, 1, sizeof(msg));
+               ret = gnutls_record_send(client, msg, dmtu+1);
+               if (ret != (int)GNUTLS_E_LARGE_PACKET) {
+                       myfail("could send larger packet than MTU (%d), ret: %d\n", dmtu, ret);
+               }
+
+               ret = gnutls_record_send(client, msg, dmtu);
+               if (ret != (int)dmtu) {
+                       myfail("could not send %d bytes (sent %d)\n", dmtu, ret);
+               }
+
+               memset(msg, 2, dmtu);
+               ret = gnutls_record_recv(server, msg, dmtu);
+               if (ret != (int)dmtu) {
+                       myfail("could not receive %d bytes (received %d)\n", dmtu, ret);
+               }
+
+               for (i=0;i<dmtu;i++)
+                       assert(msg[i]==1);
+       }
+
+       gnutls_bye(client, GNUTLS_SHUT_RDWR);
+       gnutls_bye(server, GNUTLS_SHUT_RDWR);
+
+       gnutls_deinit(client);
+       gnutls_deinit(server);
+
+       gnutls_certificate_free_credentials(serverx509cred);
+       gnutls_certificate_free_credentials(clientx509cred);
+}
+
+
+void doit(void)
+{
+       global_init();
+
+       /* check padding in CBC */
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1500, 1435);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1501", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1501, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1502", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1502, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1503", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1503, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1504", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1504, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1505", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1505, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1506", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1506, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1507", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1507, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1508", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1508, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1509", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1509, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1510", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1510, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1511", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1511, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1512", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1512, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1513", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1513, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1514", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1514, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1515", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1515, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1516", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1516, 1451);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1517", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1517, 1467);
+
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA256", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA256", 1500, 1423);
+       dtls_mtu_try("DTLS 1.2 with 3DES-CBC-HMAC-SHA1", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+3DES-CBC:-MAC-ALL:+SHA1", 1500, 1451);
+
+       /* check non-CBC ciphers */
+       dtls_mtu_try("DTLS 1.2 with AES-128-GCM", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-GCM", 1500, 1463);
+       dtls_mtu_try("DTLS 1.2 with CHACHA20-POLY1305", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+CHACHA20-POLY1305", 1500, 1471);
+
+       /* check EtM CBC */
+       dtls_mtu_try("DTLS 1.2/EtM with AES-128-CBC-HMAC-SHA1", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1500, 1439);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1501", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1501, 1439);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1502", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1502, 1439);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1503", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1503, 1439);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1504", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1504, 1439);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1505", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1505, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1506", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1506, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1507", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1507, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1508", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1508, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1509", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1509, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1510", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1510, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1511", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1511, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1512", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1512, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1513", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1513, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1514", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1514, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1515", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1515, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1516", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1516, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1517", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1517, 1455);
+       dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1518", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1518, 1455);
+
+       dtls_mtu_try("DTLS 1.2/EtM with AES-128-CBC-HMAC-SHA256", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA256", 1500, 1423);
+       dtls_mtu_try("DTLS 1.2/EtM with 3DES-CBC-HMAC-SHA1", "NORMAL:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+3DES-CBC:-MAC-ALL:+SHA1", 1500, 1455);
+
+       gnutls_global_deinit();
+}