diff options
Diffstat (limited to '')
| -rw-r--r-- | tests/dtls1-2-mtu-check.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/tests/dtls1-2-mtu-check.c b/tests/dtls1-2-mtu-check.c new file mode 100644 index 0000000..f27929b --- /dev/null +++ b/tests/dtls1-2-mtu-check.c @@ -0,0 +1,242 @@ +/* + * 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:+3DES-CBC:+ECDHE-RSA:+DHE-RSA:+RSA:+ECDHE-ECDSA:+SHA256:+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 = gnutls_malloc(dmtu+1); + assert(msg); + memset(msg, 1, dmtu+1); + 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_free(msg); + } + + gnutls_dtls_set_data_mtu(client, link_mtu); + dmtu = gnutls_dtls_get_data_mtu(client); + if (dmtu != link_mtu) { + if (gnutls_mac_get(client) == GNUTLS_MAC_AEAD) + fail("%s: got MTU (%d) which does not match expected (%d)\n", name, dmtu, link_mtu); + else if (dmtu < link_mtu) + fail("%s: got MTU (%d) smaller than expected (%d)\n", name, dmtu, link_mtu); + } + + gnutls_dtls_set_mtu(client, link_mtu); + dmtu = gnutls_dtls_get_mtu(client); + if (dmtu != link_mtu) { + fail("%s: got MTU (%d) which does not match expected (%d)\n", name, dmtu, link_mtu); + } + + 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-SHA1 - mtu:1518", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1518, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1519", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1519, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1520", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1520, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1521", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1521, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1522", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1522, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1523", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1523, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1524", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1524, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1525", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1525, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1526", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1526, 1467); + dtls_mtu_try("DTLS 1.2 with AES-128-CBC-HMAC-SHA1 - mtu:1536", "NORMAL:%NO_ETM:-VERS-ALL:+VERS-DTLS1.2:-CIPHER-ALL:+AES-128-CBC:-MAC-ALL:+SHA1", 1536, 1483); + + 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); + if (!gnutls_fips140_mode_enabled()) + 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); + if (!gnutls_fips140_mode_enabled()) + 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); + if (!gnutls_fips140_mode_enabled()) + 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(); +} |