summaryrefslogtreecommitdiff
path: root/tests/psk-file.c
blob: 2512086e0fd9daad6d82d818963b801055c7c5fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
/*
 * Copyright (C) 2004-2012 Free Software Foundation, Inc.
 * Copyright (C) 2013 Adam Sampson <ats@offog.org>
 *
 * Author: Simon Josefsson
 *
 * 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
 */

/* Parts copied from GnuTLS example programs. */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>

#if defined(_WIN32)

/* socketpair isn't supported on Win32. */
int main(int argc, char **argv)
{
	exit(77);
}

#else

#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#if !defined(_WIN32)
#include <sys/wait.h>
#endif
#include <unistd.h>
#include <assert.h>
#include <gnutls/gnutls.h>

#include "utils.h"

/* A very basic TLS client, with PSK authentication.
 */

const char *side = "";

static void tls_log_func(int level, const char *str)
{
	fprintf(stderr, "%s|<%d>| %s", side, level, str);
}

#define MAX_BUF 1024
#define MSG "Hello TLS"

static void client(int sd, const char *prio, const char *user, const gnutls_datum_t *key,
		   unsigned expect_hint, int expect_fail, int exp_kx)
{
	int ret, ii, kx;
	gnutls_session_t session;
	char buffer[MAX_BUF + 1];
	gnutls_psk_client_credentials_t pskcred;
	const char *hint;

	global_init();
	gnutls_global_set_log_function(tls_log_func);
	if (debug)
		gnutls_global_set_log_level(4711);

	side = "client";

	gnutls_psk_allocate_client_credentials(&pskcred);
	gnutls_psk_set_client_credentials(pskcred, user, key,
					  GNUTLS_PSK_KEY_HEX);

	assert(gnutls_init(&session, GNUTLS_CLIENT|GNUTLS_KEY_SHARE_TOP)>=0);

	assert(gnutls_priority_set_direct(session, prio, NULL)>=0);

	/* put the anonymous credentials to the current session
	 */
	gnutls_credentials_set(session, GNUTLS_CRD_PSK, pskcred);

	gnutls_transport_set_int(session, sd);

	/* Perform the TLS handshake
	 */
	ret = gnutls_handshake(session);

	if (ret < 0) {
		if (!expect_fail)
			fail("client: Handshake failed\n");
		if (ret != expect_fail) {
			fail("expected cli error %d (%s), got %d (%s)\n", expect_fail, gnutls_strerror(expect_fail),
								      ret, gnutls_strerror(ret));
		}
		goto end;
	} else {
		if (debug)
			success("client: Handshake was completed\n");
	}

	/* check the hint */
	if (expect_hint) {
		hint = gnutls_psk_client_get_hint(session);
		if (hint == NULL || strcmp(hint, "hint") != 0) {
			fail("client: hint is not the expected: %s\n", gnutls_psk_client_get_hint(session));
			goto end;
		}
	}

	gnutls_record_send(session, MSG, strlen(MSG));

	ret = gnutls_record_recv(session, buffer, MAX_BUF);
	if (ret == 0) {
		if (debug)
			success
			    ("client: Peer has closed the TLS connection\n");
		goto end;
	} else if (ret < 0) {
		fail("client: Error: %s\n", gnutls_strerror(ret));
		goto end;
	}

	kx = gnutls_kx_get(session);

	if (debug) {
		printf("- Received %d bytes: ", ret);
		for (ii = 0; ii < ret; ii++) {
			fputc(buffer[ii], stdout);
		}
		fputs("\n", stdout);
	}

	gnutls_bye(session, GNUTLS_SHUT_RDWR);

	if (expect_fail)
		fail("client: expected failure but connection succeeded!\n");

	if (exp_kx && kx != exp_kx) {
		fail("client: expected key exchange %s, but got %s\n",
		     gnutls_kx_get_name(exp_kx),
		     gnutls_kx_get_name(kx));
	}

      end:

	close(sd);

	gnutls_deinit(session);

	gnutls_psk_free_client_credentials(pskcred);

	gnutls_global_deinit();
}

/* This is a sample TLS 1.0 echo server, for PSK authentication.
 */

#define MAX_BUF 1024

static void server(int sd, const char *prio, const char *user, bool no_cred,
		   int expect_fail, int exp_kx)
{
	gnutls_psk_server_credentials_t server_pskcred;
	int ret, kx;
	gnutls_session_t session;
	const char *pskid;
	char buffer[MAX_BUF + 1];
	char *psk_file = getenv("PSK_FILE");
	char *desc;

	/* this must be called once in the program
	 */
	global_init();
	gnutls_global_set_log_function(tls_log_func);
	if (debug)
		gnutls_global_set_log_level(4711);

	side = "server";

	if (psk_file == NULL)
		psk_file = (char*)"psk.passwd";

	gnutls_psk_allocate_server_credentials(&server_pskcred);
	gnutls_psk_set_server_credentials_hint(server_pskcred, "hint");
	ret = gnutls_psk_set_server_credentials_file(server_pskcred, psk_file);
	if (ret < 0) {
		fail("server: gnutls_psk_set_server_credentials_file failed (%s)\n\n",
		     gnutls_strerror(ret));
		return;
	}

	gnutls_init(&session, GNUTLS_SERVER);

	assert(gnutls_priority_set_direct(session, prio, NULL)>=0);

	if (!no_cred)
		gnutls_credentials_set(session, GNUTLS_CRD_PSK, server_pskcred);

	gnutls_transport_set_int(session, sd);
	ret = gnutls_handshake(session);
	if (ret < 0) {
		gnutls_alert_send_appropriate(session, ret);
		if (expect_fail) {
			if (ret != expect_fail) {
				fail("expected error %d (%s), got %d (%s)\n", expect_fail,
									      gnutls_strerror(expect_fail),
									      ret, gnutls_strerror(ret));
			}

			if (debug)
				success("server: Handshake has failed - expected (%s)\n\n",
				     gnutls_strerror(ret));
		} else {
			fail("server: Handshake has failed (%s)\n\n",
			     gnutls_strerror(ret));
		}
		goto end;
	}
	if (debug)
		success("server: Handshake was completed\n");

	/* see the Getting peer's information example */
	/* print_info(session); */

	for (;;) {
		memset(buffer, 0, MAX_BUF + 1);
		gnutls_record_set_timeout(session, 10000);
		ret = gnutls_record_recv(session, buffer, MAX_BUF);

		if (ret == 0) {
			if (debug)
				success
				    ("server: Peer has closed the GnuTLS connection\n");
			break;
		} else if (ret < 0) {
			fail("server: Received corrupted data(%d). Closing...\n", ret);
			break;
		} else if (ret > 0) {
			/* echo data back to the client
			 */
			gnutls_record_send(session, buffer,
					   strlen(buffer));
		}
	}

	kx = gnutls_kx_get(session);

	desc = gnutls_session_get_desc(session);
	success("  - connected with: %s\n", desc);
	gnutls_free(desc);
	/* do not wait for the peer to close the connection.
	 */
	gnutls_bye(session, GNUTLS_SHUT_WR);

	if (expect_fail)
		fail("server: expected failure but connection succeeded!\n");

	if (!no_cred) {
		pskid = gnutls_psk_server_get_username(session);
		if (pskid == NULL || strcmp(pskid, user) != 0) {
			fail("server: username (%s), does not match expected (%s)\n",
			     pskid, user);
		}
	}

	if (exp_kx && kx != exp_kx) {
		fail("server: expected key exchange %s, but got %s\n",
		     gnutls_kx_get_name(exp_kx),
		     gnutls_kx_get_name(kx));
	}

 end:
	close(sd);
	gnutls_deinit(session);

	gnutls_psk_free_server_credentials(server_pskcred);

	gnutls_global_deinit();

	if (debug)
		success("server: finished\n");
}

static
void run_test3(const char *prio, const char *sprio, const char *user, const gnutls_datum_t *key, bool no_cred,
	      unsigned expect_hint, int exp_kx, int expect_fail_cli, int expect_fail_serv)
{
	pid_t child;
	int err;
	int sockets[2];

	if (expect_fail_serv || expect_fail_cli) {
		success("ntest %s (user:%s)\n", prio, user);
	} else {
		success("test %s (user:%s)\n", prio, user);
	}

	err = socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
	if (err == -1) {
		perror("socketpair");
		fail("socketpair failed\n");
		return;
	}

	child = fork();
	if (child < 0) {
		perror("fork");
		fail("fork");
		return;
	}

	if (child) {
		close(sockets[1]);
		int status;
		/* parent */
		server(sockets[0], sprio?sprio:prio, user, no_cred, expect_fail_serv, exp_kx);
		wait(&status);
		check_wait_status(status);
	} else {
		close(sockets[0]);
		client(sockets[1], prio, user, key, expect_hint, expect_fail_cli, exp_kx);
		exit(0);
	}
}

static
void run_test2(const char *prio, const char *sprio, const char *user, const gnutls_datum_t *key,
	      unsigned expect_hint, int exp_kx, int expect_fail_cli, int expect_fail_serv)
{
	run_test3(prio, sprio, user, key, 0, expect_hint, exp_kx, expect_fail_cli, expect_fail_serv);
}

static
void run_test_ok(const char *prio, const char *user, const gnutls_datum_t *key, unsigned expect_hint, int expect_fail)
{
	run_test2(prio, NULL, user, key, expect_hint, GNUTLS_KX_PSK, expect_fail, expect_fail);
}

static
void run_ectest_ok(const char *prio, const char *user, const gnutls_datum_t *key, unsigned expect_hint, int expect_fail)
{
	run_test2(prio, NULL, user, key, expect_hint, GNUTLS_KX_ECDHE_PSK, expect_fail, expect_fail);
}

static
void run_dhtest_ok(const char *prio, const char *user, const gnutls_datum_t *key, unsigned expect_hint, int expect_fail)
{
	run_test2(prio, NULL, user, key, expect_hint, GNUTLS_KX_DHE_PSK, expect_fail, expect_fail);
}

void doit(void)
{
	const gnutls_datum_t key = { (void *) "9e32cf7786321a828ef7668f09fb35db", 32 };
	const gnutls_datum_t wrong_key = { (void *) "9e31cf7786321a828ef7668f09fb35db", 32 };

	run_test_ok("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", "jas", &key, 1, 0);
	run_dhtest_ok("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+DHE-PSK", "jas", &key, 1, 0);
	run_ectest_ok("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+ECDHE-PSK", "jas", &key, 1, 0);
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", NULL, "unknown", &key, 1, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_DECRYPTION_FAILED);
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", NULL, "jas", &wrong_key, 1, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_DECRYPTION_FAILED);
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", NULL, "non-hex", &key, 1, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_KEYFILE_ERROR);

	run_test_ok("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+PSK", "jas", &key, 1, 0);
	run_test_ok("NORMAL:-KX-ALL:+PSK", "jas", &key, 0, 0);
	run_test2("NORMAL:+PSK", NULL, "unknown", &key, 1, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER);
	run_test2("NORMAL:+PSK", NULL, "jas", &wrong_key, 1, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER);
	run_test2("NORMAL:-KX-ALL:+PSK", NULL, "non-hex", &key, 1, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_KEYFILE_ERROR);

	run_dhtest_ok("NORMAL:-VERS-ALL:+VERS-TLS1.3:+DHE-PSK:-GROUP-EC-ALL", "jas", &key, 0, 0);
	run_test_ok("NORMAL:-VERS-ALL:+VERS-TLS1.3:+PSK", "jas", &key, 0, 0);

	/* test priorities of DHE-PSK and PSK */
	run_ectest_ok("NORMAL:-VERS-ALL:+VERS-TLS1.3:-CIPHER-ALL:+AES-128-GCM:+DHE-PSK:+PSK:-GROUP-DH-ALL", "jas", &key, 0, 0);
	run_test_ok("NORMAL:-VERS-ALL:+VERS-TLS1.3:-CIPHER-ALL:+AES-128-GCM:+PSK:+DHE-PSK:-GROUP-DH-ALL", "jas", &key, 0, 0);
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.3:-CIPHER-ALL:+AES-128-GCM:+DHE-PSK:+PSK:-GROUP-DH-ALL", 
		  "NORMAL:-VERS-ALL:+VERS-TLS1.3:-CIPHER-ALL:+AES-128-GCM:+PSK:+DHE-PSK:%SERVER_PRECEDENCE:-GROUP-DH-ALL",
		  "jas", &key, 0, GNUTLS_KX_PSK, 0, 0);
	/* try with PRF that doesn't match binder (SHA256) */
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.3:-CIPHER-ALL:+AES-256-GCM:+PSK:+DHE-PSK", NULL, "jas", &key, 0, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_NO_CIPHER_SUITES);
	/* try with no groups and PSK */
	run_test_ok("NORMAL:-VERS-ALL:+VERS-TLS1.3:+PSK:-GROUP-ALL", "jas", &key, 0, 0);
	/* try without any groups but DHE-PSK */
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.3:+DHE-PSK:-GROUP-ALL", "NORMAL:-VERS-ALL:+VERS-TLS1.3:+DHE-PSK:+PSK", "jas", &key, 0, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_NO_COMMON_KEY_SHARE);
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.3:+DHE-PSK:-GROUP-ALL", "NORMAL:-VERS-ALL:+VERS-TLS1.3:+DHE-PSK:+PSK:-GROUP-ALL", "jas", &key, 0, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_NO_COMMON_KEY_SHARE);

	/* if user invalid we continue without PSK */
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.3:+PSK:+DHE-PSK", NULL, "non-hex", &key, 0, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_KEYFILE_ERROR);
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.3:+PSK:+DHE-PSK", NULL, "unknown", &key, 0, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER);
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.3:+PSK:+DHE-PSK", NULL, "jas", &wrong_key, 0, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_RECEIVED_ILLEGAL_PARAMETER);

	/* try with HelloRetryRequest and PSK */
	run_test2("NORMAL:-VERS-ALL:+VERS-TLS1.3:+DHE-PSK:-GROUP-ALL:+GROUP-FFDHE2048:+GROUP-FFDHE4096", "NORMAL:-VERS-ALL:+VERS-TLS1.3:+DHE-PSK:-GROUP-ALL:+GROUP-FFDHE4096", "jas", &key, 0, GNUTLS_KX_DHE_PSK, 0, 0);

	/* try without server credentials */
	run_test3("NORMAL:-VERS-ALL:+VERS-TLS1.3:+PSK:+DHE-PSK", NULL, "jas", &key, 1, 0, 0, GNUTLS_E_FATAL_ALERT_RECEIVED, GNUTLS_E_INSUFFICIENT_CREDENTIALS);
}

#endif				/* _WIN32 */