1 /*
2 * Copyright (C) 2004-2012 Free Software Foundation, Inc.
3 * Copyright (C) 2013 Adam Sampson <ats@offog.org>
4 * Copyright (C) 2013-2017 Nikos Mavrogiannopoulos
5 *
6 * Author: Nikos Mavrogiannopoulos
7 *
8 * This file is part of GnuTLS.
9 *
10 * GnuTLS is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * GnuTLS is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with GnuTLS; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
23 */
24
25 /* Tests the RSA-PSK ciphersuites under TLS1.2 */
26
27 #ifdef HAVE_CONFIG_H
28 #include <config.h>
29 #endif
30
31 #include <stdio.h>
32 #include <stdlib.h>
33
34 #if defined(_WIN32)
35
36 /* socketpair isn't supported on Win32. */
main(int argc,char ** argv)37 int main(int argc, char **argv)
38 {
39 exit(77);
40 }
41
42 #else
43
44 #include <string.h>
45 #include <sys/types.h>
46 #include <sys/socket.h>
47 #include <sys/wait.h>
48 #include <unistd.h>
49 #include <assert.h>
50 #include <gnutls/gnutls.h>
51 #include "cert-common.h"
52 #include "utils.h"
53
54 /* A very basic TLS client, with PSK authentication.
55 */
56
57 const char *side = "";
58
tls_log_func(int level,const char * str)59 static void tls_log_func(int level, const char *str)
60 {
61 fprintf(stderr, "%s|<%d>| %s", side, level, str);
62 }
63
64 #define MAX_BUF 1024
65 #define MSG "Hello TLS"
66
client(int sd)67 static void client(int sd)
68 {
69 int ret, ii;
70 gnutls_session_t session;
71 gnutls_certificate_credentials_t clientx509cred;
72 char buffer[MAX_BUF + 1];
73 gnutls_psk_client_credentials_t pskcred;
74 /* Need to enable anonymous KX specifically. */
75 const gnutls_datum_t key = { (void *) "DEADBEEF", 8 };
76
77 global_init();
78 gnutls_global_set_log_function(tls_log_func);
79 if (debug)
80 gnutls_global_set_log_level(4711);
81
82 side = "client";
83
84 gnutls_certificate_allocate_credentials(&clientx509cred);
85
86 gnutls_psk_allocate_client_credentials(&pskcred);
87 gnutls_psk_set_client_credentials(pskcred, "test", &key,
88 GNUTLS_PSK_KEY_HEX);
89
90 /* Initialize TLS session
91 */
92 gnutls_init(&session, GNUTLS_CLIENT);
93
94 /* Use default priorities */
95 gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+RSA-PSK",
96 NULL);
97
98 /* put the anonymous credentials to the current session
99 */
100 gnutls_credentials_set(session, GNUTLS_CRD_PSK, pskcred);
101 gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
102 clientx509cred);
103
104 gnutls_handshake_set_timeout(session, 20 * 1000);
105 gnutls_transport_set_int(session, sd);
106
107 /* Perform the TLS handshake
108 */
109 ret = gnutls_handshake(session);
110
111 if (ret < 0) {
112 fail("client: Handshake failed\n");
113 gnutls_perror(ret);
114 goto end;
115 } else {
116 if (debug)
117 success("client: Handshake was completed\n");
118 }
119
120 gnutls_record_send(session, MSG, strlen(MSG));
121
122 ret = gnutls_record_recv(session, buffer, MAX_BUF);
123 if (ret == 0) {
124 if (debug)
125 success
126 ("client: Peer has closed the TLS connection\n");
127 goto end;
128 } else if (ret < 0) {
129 fail("client: Error: %s\n", gnutls_strerror(ret));
130 goto end;
131 }
132
133 if (debug) {
134 printf("- Received %d bytes: ", ret);
135 for (ii = 0; ii < ret; ii++) {
136 fputc(buffer[ii], stdout);
137 }
138 fputs("\n", stdout);
139 }
140
141 gnutls_bye(session, GNUTLS_SHUT_RDWR);
142
143 end:
144
145 close(sd);
146
147 gnutls_deinit(session);
148
149 gnutls_psk_free_client_credentials(pskcred);
150 gnutls_certificate_free_credentials(clientx509cred);
151
152 gnutls_global_deinit();
153 }
154
155 /* This is a sample TLS 1.0 echo server, for PSK authentication.
156 */
157
158 #define MAX_BUF 1024
159
160 static int
psk_server_func(gnutls_session_t session,const char * username,gnutls_datum_t * key)161 psk_server_func(gnutls_session_t session, const char *username,
162 gnutls_datum_t * key)
163 {
164 if (debug)
165 printf("psk: username %s\n", username);
166
167 if (strcmp(username, "test") != 0) {
168 fail("error in received username: '%s'\n", username);
169 }
170
171 key->data = gnutls_malloc(4);
172 assert(key->data != NULL);
173 key->data[0] = 0xDE;
174 key->data[1] = 0xAD;
175 key->data[2] = 0xBE;
176 key->data[3] = 0xEF;
177 key->size = 4;
178 return 0;
179 }
180
181 int err, ret;
182 char topbuf[512];
183 gnutls_session_t session;
184 char buffer[MAX_BUF + 1];
185 int optval = 1;
186
server(int sd)187 static void server(int sd)
188 {
189 gnutls_certificate_credentials_t serverx509cred;
190 gnutls_psk_server_credentials_t server_pskcred;
191
192 /* this must be called once in the program
193 */
194 global_init();
195 gnutls_global_set_log_function(tls_log_func);
196 if (debug)
197 gnutls_global_set_log_level(4711);
198
199 side = "server";
200
201 gnutls_psk_allocate_server_credentials(&server_pskcred);
202 gnutls_psk_set_server_credentials_function(server_pskcred,
203 psk_server_func);
204 gnutls_psk_set_server_credentials_hint(server_pskcred, "hint");
205 gnutls_certificate_allocate_credentials(&serverx509cred);
206 gnutls_certificate_set_x509_key_mem(serverx509cred,
207 &server_cert, &server_key,
208 GNUTLS_X509_FMT_PEM);
209
210 gnutls_init(&session, GNUTLS_SERVER);
211
212 /* avoid calling all the priority functions, since the defaults
213 * are adequate.
214 */
215 gnutls_priority_set_direct(session, "NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+RSA-PSK",
216 NULL);
217
218
219 gnutls_credentials_set(session, GNUTLS_CRD_PSK, server_pskcred);
220 gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
221 serverx509cred);
222
223 gnutls_handshake_set_timeout(session, 20 * 1000);
224 gnutls_transport_set_int(session, sd);
225 ret = gnutls_handshake(session);
226 if (ret < 0) {
227 close(sd);
228 gnutls_deinit(session);
229 fail("server: Handshake has failed (%s)\n\n",
230 gnutls_strerror(ret));
231 return;
232 }
233 if (debug)
234 success("server: Handshake was completed\n");
235
236 /* see the Getting peer's information example */
237 /* print_info(session); */
238
239 for (;;) {
240 memset(buffer, 0, MAX_BUF + 1);
241 ret = gnutls_record_recv(session, buffer, MAX_BUF);
242
243 if (ret == 0) {
244 if (debug)
245 success
246 ("server: Peer has closed the GnuTLS connection\n");
247 break;
248 } else if (ret < 0) {
249 fail("server: Received corrupted data(%d). Closing...\n", ret);
250 break;
251 } else if (ret > 0) {
252 /* echo data back to the client
253 */
254 gnutls_record_send(session, buffer,
255 strlen(buffer));
256 }
257 }
258 /* do not wait for the peer to close the connection.
259 */
260 gnutls_bye(session, GNUTLS_SHUT_WR);
261
262 close(sd);
263 gnutls_deinit(session);
264
265 gnutls_psk_free_server_credentials(server_pskcred);
266 gnutls_certificate_free_credentials(serverx509cred);
267
268 gnutls_global_deinit();
269
270 if (debug)
271 success("server: finished\n");
272 }
273
doit(void)274 void doit(void)
275 {
276 pid_t child;
277 int sockets[2];
278
279 err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
280 if (err == -1) {
281 perror("socketpair");
282 fail("socketpair failed\n");
283 return;
284 }
285
286 child = fork();
287 if (child < 0) {
288 perror("fork");
289 fail("fork");
290 return;
291 }
292
293 if (child) {
294 int status;
295 /* parent */
296 close(sockets[1]);
297 server(sockets[0]);
298 wait(&status);
299 check_wait_status(status);
300 } else {
301 close(sockets[0]);
302 client(sockets[1]);
303 exit(0);
304 }
305 }
306
307 #endif /* _WIN32 */
308