2 * Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010 Free Software
5 * Author: Simon Josefsson
7 * This file is part of GnuTLS.
9 * GnuTLS is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
14 * GnuTLS is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with GnuTLS; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
24 /* Parts copied from GnuTLS example programs. */
33 #include <sys/types.h>
35 #include <sys/socket.h>
37 #include <netinet/in.h>
38 #include <arpa/inet.h>
41 #include <gnutls/gnutls.h>
47 static void wrap_db_init (void);
48 static void wrap_db_deinit (void);
49 static int wrap_db_store (void *dbf, gnutls_datum_t key, gnutls_datum_t data);
50 static gnutls_datum_t wrap_db_fetch (void *dbf, gnutls_datum_t key);
51 static int wrap_db_delete (void *dbf, gnutls_datum_t key);
53 #define TLS_SESSION_CACHE 50
59 int enable_session_ticket_server;
60 int enable_session_ticket_client;
66 struct params_res resume_tests[] = {
67 {"try to resume from db", 50, 0, 0, 1},
68 #ifdef ENABLE_SESSION_TICKET
69 {"try to resume from session ticket", 0, 1, 1, 1},
70 {"try to resume from session ticket (server only)", 0, 1, 0, 0},
71 {"try to resume from session ticket (client only)", 0, 0, 1, 0},
76 /* A very basic TLS client, with anonymous authentication.
80 #define MSG "Hello TLS"
83 tls_log_func (int level, const char *str)
85 fprintf (stderr, "%s |<%d>| %s", child ? "server" : "client", level, str);
89 client (struct params_res *params)
92 gnutls_session_t session;
93 char buffer[MAX_BUF + 1];
94 gnutls_anon_client_credentials_t anoncred;
95 /* Need to enable anonymous KX specifically. */
97 /* variables used in session resuming
100 gnutls_datum_t session_data;
104 gnutls_global_set_log_function (tls_log_func);
105 gnutls_global_set_log_level (2);
107 gnutls_global_init ();
109 gnutls_anon_allocate_client_credentials (&anoncred);
111 for (t = 0; t < 2; t++)
112 { /* connect 2 times to the server */
113 /* connect to the peer
117 /* Initialize TLS session
119 gnutls_init (&session, GNUTLS_CLIENT);
121 /* Use default priorities */
122 gnutls_priority_set_direct (session, "NONE:+VERS-TLS-ALL:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH", NULL);
124 /* put the anonymous credentials to the current session
126 gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
128 #ifdef ENABLE_SESSION_TICKET
129 if (params->enable_session_ticket_client)
130 gnutls_session_ticket_enable_client (session);
135 /* if this is not the first time we connect */
136 gnutls_session_set_data (session, session_data.data,
138 gnutls_free (session_data.data);
141 gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
143 /* Perform the TLS handshake
145 ret = gnutls_handshake (session);
149 fail ("client: Handshake failed\n");
156 success ("client: Handshake was completed\n");
160 { /* the first time we connect */
161 /* get the session data size */
162 ret = gnutls_session_get_data2 (session, &session_data);
164 fail ("Getting resume data failed\n");
167 { /* the second time we connect */
169 /* check if we actually resumed the previous session */
170 if (gnutls_session_is_resumed (session) != 0)
172 if (params->expect_resume)
175 success ("- Previous session was resumed\n");
178 fail ("- Previous session was resumed\n");
182 if (params->expect_resume)
183 fail ("*** Previous session was NOT resumed\n");
188 ("*** Previous session was NOT resumed (expected)\n");
193 gnutls_record_send (session, MSG, strlen (MSG));
195 ret = gnutls_record_recv (session, buffer, MAX_BUF);
199 success ("client: Peer has closed the TLS connection\n");
204 fail ("client: Error: %s\n", gnutls_strerror (ret));
210 printf ("- Received %d bytes: ", ret);
211 for (ii = 0; ii < ret; ii++)
213 fputc (buffer[ii], stdout);
215 fputs ("\n", stdout);
218 gnutls_bye (session, GNUTLS_SHUT_RDWR);
223 gnutls_deinit (session);
227 gnutls_anon_free_client_credentials (anoncred);
230 /* This is a sample TLS 1.0 echo server, for anonymous authentication only.
233 #define SA struct sockaddr
235 #define PORT 5556 /* listen to 5556 port */
238 /* These are global */
239 gnutls_anon_server_credentials_t anoncred;
240 gnutls_datum_t session_ticket_key = { NULL, 0 };
242 static gnutls_session_t
243 initialize_tls_session (struct params_res *params)
245 gnutls_session_t session;
247 gnutls_init (&session, GNUTLS_SERVER);
249 /* avoid calling all the priority functions, since the defaults
252 gnutls_priority_set_direct (session, "NONE:+VERS-TLS-ALL:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-DH", NULL);
254 gnutls_credentials_set (session, GNUTLS_CRD_ANON, anoncred);
256 gnutls_dh_set_prime_bits (session, DH_BITS);
258 if (params->enable_db)
260 gnutls_db_set_retrieve_function (session, wrap_db_fetch);
261 gnutls_db_set_remove_function (session, wrap_db_delete);
262 gnutls_db_set_store_function (session, wrap_db_store);
263 gnutls_db_set_ptr (session, NULL);
265 #ifdef ENABLE_SESSION_TICKET
266 if (params->enable_session_ticket_server)
267 gnutls_session_ticket_enable_server (session, &session_ticket_key);
273 static gnutls_dh_params_t dh_params;
276 generate_dh_params (void)
278 const gnutls_datum_t p3 = { (char *) pkcs3, strlen (pkcs3) };
279 /* Generate Diffie-Hellman parameters - for use with DHE
280 * kx algorithms. These should be discarded and regenerated
281 * once a day, once a week or once a month. Depending on the
282 * security requirements.
284 gnutls_dh_params_init (&dh_params);
285 return gnutls_dh_params_import_pkcs3 (dh_params, &p3, GNUTLS_X509_FMT_PEM);
288 int err, listen_sd, i;
290 struct sockaddr_in sa_serv;
291 struct sockaddr_in sa_cli;
294 gnutls_session_t session;
295 char buffer[MAX_BUF + 1];
303 listen_sd = socket (AF_INET, SOCK_STREAM, 0);
307 fail ("server: socket failed\n");
311 memset (&sa_serv, '\0', sizeof (sa_serv));
312 sa_serv.sin_family = AF_INET;
313 sa_serv.sin_addr.s_addr = INADDR_ANY;
314 sa_serv.sin_port = htons (PORT); /* Server Port number */
316 setsockopt (listen_sd, SOL_SOCKET, SO_REUSEADDR, (void *) &optval,
319 err = bind (listen_sd, (SA *) & sa_serv, sizeof (sa_serv));
323 fail ("server: bind failed\n");
327 err = listen (listen_sd, 1024);
331 fail ("server: listen failed\n");
336 success ("server: ready. Listening to port '%d'.\n", PORT);
343 success ("global stop\n");
345 gnutls_anon_free_server_credentials (anoncred);
347 gnutls_dh_params_deinit (dh_params);
349 gnutls_global_deinit ();
351 shutdown (listen_sd, SHUT_RDWR);
355 server (struct params_res *params)
359 /* this must be called once in the program, it is mostly for the server.
363 gnutls_global_set_log_function (tls_log_func);
364 gnutls_global_set_log_level (2);
367 gnutls_global_init ();
368 gnutls_anon_allocate_server_credentials (&anoncred);
371 success ("Launched, generating DH parameters...\n");
373 generate_dh_params ();
375 gnutls_anon_set_server_dh_params (anoncred, dh_params);
377 if (params->enable_db)
381 #ifdef ENABLE_SESSION_TICKET
382 if (params->enable_session_ticket_server)
383 gnutls_session_ticket_key_generate (&session_ticket_key);
386 for (t = 0; t < 2; t++)
388 client_len = sizeof (sa_cli);
390 session = initialize_tls_session (params);
392 sd = accept (listen_sd, (SA *) & sa_cli, &client_len);
395 success ("server: connection from %s, port %d\n",
396 inet_ntop (AF_INET, &sa_cli.sin_addr, topbuf,
397 sizeof (topbuf)), ntohs (sa_cli.sin_port));
399 gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
400 ret = gnutls_handshake (session);
404 gnutls_deinit (session);
405 fail ("server: Handshake has failed (%s)\n\n",
406 gnutls_strerror (ret));
410 success ("server: Handshake was completed\n");
412 /* see the Getting peer's information example */
413 /* print_info(session); */
418 memset (buffer, 0, MAX_BUF + 1);
419 ret = gnutls_record_recv (session, buffer, MAX_BUF);
424 success ("server: Peer has closed the GnuTLS connection\n");
429 fail ("server: Received corrupted data(%d). Closing...\n", ret);
434 /* echo data back to the client
436 gnutls_record_send (session, buffer, strlen (buffer));
439 /* do not wait for the peer to close the connection.
441 gnutls_bye (session, GNUTLS_SHUT_WR);
445 gnutls_deinit (session);
450 if (params->enable_db)
455 gnutls_free (session_ticket_key.data);
456 session_ticket_key.data = NULL;
459 success ("server: finished\n");
467 for (i = 0; resume_tests[i].desc; i++)
470 printf ("%s\n", resume_tests[i].desc);
488 server (&resume_tests[i]);
494 client (&resume_tests[i]);
495 gnutls_global_deinit ();
501 /* Functions and other stuff needed for session resuming.
502 * This is done using a very simple list which holds session ids
506 #define MAX_SESSION_ID_SIZE 32
507 #define MAX_SESSION_DATA_SIZE 512
511 unsigned char session_id[MAX_SESSION_ID_SIZE];
512 unsigned int session_id_size;
514 char session_data[MAX_SESSION_DATA_SIZE];
515 int session_data_size;
518 static CACHE *cache_db;
519 static int cache_db_ptr = 0;
525 /* allocate cache_db */
526 cache_db = calloc (1, TLS_SESSION_CACHE * sizeof (CACHE));
530 wrap_db_deinit (void)
538 wrap_db_store (void *dbf, gnutls_datum_t key, gnutls_datum_t data)
541 success ("resume db storing... (%d-%d)\n", key.size, data.size);
547 for (i = 0; i < key.size; i++)
549 printf ("%02x ", key.data[i] & 0xFF);
550 if ((i + 1) % 16 == 0)
555 for (i = 0; i < data.size; i++)
557 printf ("%02x ", data.data[i] & 0xFF);
558 if ((i + 1) % 16 == 0)
564 if (cache_db == NULL)
567 if (key.size > MAX_SESSION_ID_SIZE)
569 if (data.size > MAX_SESSION_DATA_SIZE)
572 memcpy (cache_db[cache_db_ptr].session_id, key.data, key.size);
573 cache_db[cache_db_ptr].session_id_size = key.size;
575 memcpy (cache_db[cache_db_ptr].session_data, data.data, data.size);
576 cache_db[cache_db_ptr].session_data_size = data.size;
579 cache_db_ptr %= TLS_SESSION_CACHE;
584 static gnutls_datum_t
585 wrap_db_fetch (void *dbf, gnutls_datum_t key)
587 gnutls_datum_t res = { NULL, 0 };
591 success ("resume db fetch... (%d)\n", key.size);
596 for (i = 0; i < key.size; i++)
598 printf ("%02x ", key.data[i] & 0xFF);
599 if ((i + 1) % 16 == 0)
605 if (cache_db == NULL)
608 for (i = 0; i < TLS_SESSION_CACHE; i++)
610 if (key.size == cache_db[i].session_id_size &&
611 memcmp (key.data, cache_db[i].session_id, key.size) == 0)
614 success ("resume db fetch... return info\n");
616 res.size = cache_db[i].session_data_size;
618 res.data = gnutls_malloc (res.size);
619 if (res.data == NULL)
622 memcpy (res.data, cache_db[i].session_data, res.size);
628 for (i = 0; i < res.size; i++)
630 printf ("%02x ", res.data[i] & 0xFF);
631 if ((i + 1) % 16 == 0)
644 wrap_db_delete (void *dbf, gnutls_datum_t key)
648 if (cache_db == NULL)
651 for (i = 0; i < TLS_SESSION_CACHE; i++)
653 if (key.size == cache_db[i].session_id_size &&
654 memcmp (key.data, cache_db[i].session_id, key.size) == 0)
657 cache_db[i].session_id_size = 0;
658 cache_db[i].session_data_size = 0;