2 * Copyright (C) 2004-2012 Free Software Foundation, Inc.
4 * Author: Simon Josefsson
6 * This file is part of GnuTLS.
8 * GnuTLS is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * GnuTLS is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with GnuTLS; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
23 /* Parts copied from GnuTLS example programs. */
32 #include <sys/types.h>
33 #include <sys/socket.h>
36 #include <netinet/in.h>
37 #include <arpa/inet.h>
40 #include <gnutls/gnutls.h>
46 static void wrap_db_init (void);
47 static void wrap_db_deinit (void);
48 static int wrap_db_store (void *dbf, gnutls_datum_t key, gnutls_datum_t data);
49 static gnutls_datum_t wrap_db_fetch (void *dbf, gnutls_datum_t key);
50 static int wrap_db_delete (void *dbf, gnutls_datum_t key);
52 #define TLS_SESSION_CACHE 50
58 int enable_session_ticket_server;
59 int enable_session_ticket_client;
65 struct params_res resume_tests[] = {
66 {"try to resume from db", 50, 0, 0, 1},
67 {"try to resume from session ticket", 0, 1, 1, 1},
68 {"try to resume from session ticket (server only)", 0, 1, 0, 0},
69 {"try to resume from session ticket (client only)", 0, 0, 1, 0},
73 /* A very basic TLS client, with anonymous authentication.
76 #define MAX_BUF 5*1024
77 #define MSG "Hello TLS"
80 tls_log_func (int level, const char *str)
82 fprintf (stderr, "%s |<%d>| %s", child ? "server" : "client", level, str);
86 client (struct params_res *params)
89 gnutls_session_t session;
90 char buffer[MAX_BUF + 1];
91 gnutls_anon_client_credentials_t anoncred;
92 /* Need to enable anonymous KX specifically. */
94 /* variables used in session resuming
97 gnutls_datum_t session_data;
101 gnutls_global_set_log_function (tls_log_func);
102 gnutls_global_set_log_level (2);
104 gnutls_global_init ();
106 gnutls_anon_allocate_client_credentials (&anoncred);
108 for (t = 0; t < 2; t++)
109 { /* connect 2 times to the server */
110 /* connect to the peer
114 /* Initialize TLS session
116 gnutls_init (&session, GNUTLS_CLIENT);
118 /* Use default priorities */
119 gnutls_priority_set_direct (session, "NONE:+VERS-TLS-ALL:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH", NULL);
121 /* put the anonymous credentials to the current session
123 gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
125 if (params->enable_session_ticket_client)
126 gnutls_session_ticket_enable_client (session);
130 /* if this is not the first time we connect */
131 gnutls_session_set_data (session, session_data.data,
133 gnutls_free (session_data.data);
136 gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
138 /* Perform the TLS handshake
140 ret = gnutls_handshake (session);
144 fail ("client: Handshake failed\n");
151 success ("client: Handshake was completed\n");
155 { /* the first time we connect */
156 /* get the session data size */
157 ret = gnutls_session_get_data2 (session, &session_data);
159 fail ("Getting resume data failed\n");
162 { /* the second time we connect */
164 /* check if we actually resumed the previous session */
165 if (gnutls_session_is_resumed (session) != 0)
167 if (params->expect_resume)
170 success ("- Previous session was resumed\n");
173 fail ("- Previous session was resumed\n");
177 if (params->expect_resume)
179 fail ("*** Previous session was NOT resumed\n");
185 ("*** Previous session was NOT resumed (expected)\n");
190 gnutls_record_send (session, MSG, strlen (MSG));
192 ret = gnutls_record_recv (session, buffer, MAX_BUF);
196 success ("client: Peer has closed the TLS connection\n");
201 fail ("client: Error: %s\n", gnutls_strerror (ret));
207 printf ("- Received %d bytes: ", ret);
208 for (ii = 0; ii < ret; ii++)
210 fputc (buffer[ii], stdout);
212 fputs ("\n", stdout);
215 gnutls_bye (session, GNUTLS_SHUT_RDWR);
220 gnutls_deinit (session);
224 gnutls_anon_free_client_credentials (anoncred);
227 /* This is a sample TLS 1.0 echo server, for anonymous authentication only.
230 #define SA struct sockaddr
231 #define PORT 5556 /* listen to 5556 port */
234 /* These are global */
235 gnutls_anon_server_credentials_t anoncred;
236 static gnutls_datum_t session_ticket_key = { NULL, 0 };
238 static gnutls_session_t
239 initialize_tls_session (struct params_res *params)
241 gnutls_session_t session;
243 gnutls_init (&session, GNUTLS_SERVER);
245 /* avoid calling all the priority functions, since the defaults
248 gnutls_priority_set_direct (session, "NONE:+VERS-TLS-ALL:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH", NULL);
250 gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
252 gnutls_dh_set_prime_bits (session, DH_BITS);
254 if (params->enable_db)
256 gnutls_db_set_retrieve_function (session, wrap_db_fetch);
257 gnutls_db_set_remove_function (session, wrap_db_delete);
258 gnutls_db_set_store_function (session, wrap_db_store);
259 gnutls_db_set_ptr (session, NULL);
262 if (params->enable_session_ticket_server)
263 gnutls_session_ticket_enable_server (session, &session_ticket_key);
268 static gnutls_dh_params_t dh_params;
271 generate_dh_params (void)
273 const gnutls_datum_t p3 = { (void *) pkcs3, strlen (pkcs3) };
274 /* Generate Diffie-Hellman parameters - for use with DHE
275 * kx algorithms. These should be discarded and regenerated
276 * once a day, once a week or once a month. Depending on the
277 * security requirements.
279 gnutls_dh_params_init (&dh_params);
280 return gnutls_dh_params_import_pkcs3 (dh_params, &p3, GNUTLS_X509_FMT_PEM);
283 int err, listen_sd, i;
285 struct sockaddr_in sa_serv;
286 struct sockaddr_in sa_cli;
287 socklen_t client_len;
289 gnutls_session_t session;
290 char buffer[MAX_BUF + 1];
298 listen_sd = socket (AF_INET, SOCK_STREAM, 0);
302 fail ("server: socket failed\n");
306 memset (&sa_serv, '\0', sizeof (sa_serv));
307 sa_serv.sin_family = AF_INET;
308 sa_serv.sin_addr.s_addr = INADDR_ANY;
309 sa_serv.sin_port = htons (PORT); /* Server Port number */
311 setsockopt (listen_sd, SOL_SOCKET, SO_REUSEADDR, (void *) &optval,
314 err = bind (listen_sd, (SA *) & sa_serv, sizeof (sa_serv));
318 fail ("server: bind failed\n");
322 err = listen (listen_sd, 1024);
326 fail ("server: listen failed\n");
331 success ("server: ready. Listening to port '%d'.\n", PORT);
338 success ("global stop\n");
340 gnutls_anon_free_server_credentials (anoncred);
342 gnutls_dh_params_deinit (dh_params);
344 gnutls_global_deinit ();
346 shutdown (listen_sd, SHUT_RDWR);
350 server (struct params_res *params)
354 /* this must be called once in the program, it is mostly for the server.
358 gnutls_global_set_log_function (tls_log_func);
359 gnutls_global_set_log_level (2);
362 gnutls_global_init ();
363 gnutls_anon_allocate_server_credentials (&anoncred);
366 success ("Launched, generating DH parameters...\n");
368 generate_dh_params ();
370 gnutls_anon_set_server_dh_params (anoncred, dh_params);
372 if (params->enable_db)
377 if (params->enable_session_ticket_server)
378 gnutls_session_ticket_key_generate (&session_ticket_key);
380 for (t = 0; t < 2; t++)
382 client_len = sizeof (sa_cli);
384 session = initialize_tls_session (params);
386 sd = accept (listen_sd, (SA *) & sa_cli, &client_len);
389 success ("server: connection from %s, port %d\n",
390 inet_ntop (AF_INET, &sa_cli.sin_addr, topbuf,
391 sizeof (topbuf)), ntohs (sa_cli.sin_port));
393 gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
394 ret = gnutls_handshake (session);
398 gnutls_deinit (session);
399 fail ("server: Handshake has failed (%s)\n\n",
400 gnutls_strerror (ret));
404 success ("server: Handshake was completed\n");
406 /* see the Getting peer's information example */
407 /* print_info(session); */
412 memset (buffer, 0, MAX_BUF + 1);
413 ret = gnutls_record_recv (session, buffer, MAX_BUF);
418 success ("server: Peer has closed the GnuTLS connection\n");
423 fail ("server: Received corrupted data(%d). Closing...\n", ret);
428 /* echo data back to the client
430 gnutls_record_send (session, buffer, strlen (buffer));
433 /* do not wait for the peer to close the connection.
435 gnutls_bye (session, GNUTLS_SHUT_WR);
439 gnutls_deinit (session);
444 if (params->enable_db)
449 gnutls_free (session_ticket_key.data);
450 session_ticket_key.data = NULL;
453 success ("server: finished\n");
461 for (i = 0; resume_tests[i].desc; i++)
463 printf ("%s\n", resume_tests[i].desc);
481 server (&resume_tests[i]);
483 if (WEXITSTATUS(status) > 0)
489 client (&resume_tests[i]);
490 gnutls_global_deinit ();
498 /* Functions and other stuff needed for session resuming.
499 * This is done using a very simple list which holds session ids
503 #define MAX_SESSION_ID_SIZE 32
504 #define MAX_SESSION_DATA_SIZE 1024
508 unsigned char session_id[MAX_SESSION_ID_SIZE];
509 unsigned int session_id_size;
511 char session_data[MAX_SESSION_DATA_SIZE];
512 int session_data_size;
515 static CACHE *cache_db;
516 static int cache_db_ptr = 0;
522 /* allocate cache_db */
523 cache_db = calloc (1, TLS_SESSION_CACHE * sizeof (CACHE));
527 wrap_db_deinit (void)
535 wrap_db_store (void *dbf, gnutls_datum_t key, gnutls_datum_t data)
538 success ("resume db storing... (%d-%d)\n", key.size, data.size);
544 for (i = 0; i < key.size; i++)
546 printf ("%02x ", key.data[i] & 0xFF);
547 if ((i + 1) % 16 == 0)
552 for (i = 0; i < data.size; i++)
554 printf ("%02x ", data.data[i] & 0xFF);
555 if ((i + 1) % 16 == 0)
561 if (cache_db == NULL)
564 if (key.size > MAX_SESSION_ID_SIZE)
567 if (data.size > MAX_SESSION_DATA_SIZE)
570 memcpy (cache_db[cache_db_ptr].session_id, key.data, key.size);
571 cache_db[cache_db_ptr].session_id_size = key.size;
573 memcpy (cache_db[cache_db_ptr].session_data, data.data, data.size);
574 cache_db[cache_db_ptr].session_data_size = data.size;
577 cache_db_ptr %= TLS_SESSION_CACHE;
582 static gnutls_datum_t
583 wrap_db_fetch (void *dbf, gnutls_datum_t key)
585 gnutls_datum_t res = { NULL, 0 };
589 success ("resume db fetch... (%d)\n", key.size);
594 for (i = 0; i < key.size; i++)
596 printf ("%02x ", key.data[i] & 0xFF);
597 if ((i + 1) % 16 == 0)
603 if (cache_db == NULL)
606 for (i = 0; i < TLS_SESSION_CACHE; i++)
608 if (key.size == cache_db[i].session_id_size &&
609 memcmp (key.data, cache_db[i].session_id, key.size) == 0)
612 success ("resume db fetch... return info\n");
614 res.size = cache_db[i].session_data_size;
616 res.data = gnutls_malloc (res.size);
617 if (res.data == NULL)
620 memcpy (res.data, cache_db[i].session_data, res.size);
626 for (i = 0; i < res.size; i++)
628 printf ("%02x ", res.data[i] & 0xFF);
629 if ((i + 1) % 16 == 0)
640 success ("resume db fetch... NOT FOUND\n");
645 wrap_db_delete (void *dbf, gnutls_datum_t key)
649 if (cache_db == NULL)
652 for (i = 0; i < TLS_SESSION_CACHE; i++)
654 if (key.size == cache_db[i].session_id_size &&
655 memcmp (key.data, cache_db[i].session_id, key.size) == 0)
658 cache_db[i].session_id_size = 0;
659 cache_db[i].session_data_size = 0;