summaryrefslogtreecommitdiff
path: root/src/lib/libssl/d1_lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/lib/libssl/d1_lib.c')
-rw-r--r--src/lib/libssl/d1_lib.c468
1 files changed, 0 insertions, 468 deletions
diff --git a/src/lib/libssl/d1_lib.c b/src/lib/libssl/d1_lib.c
deleted file mode 100644
index 9d9a90d76a..0000000000
--- a/src/lib/libssl/d1_lib.c
+++ /dev/null
@@ -1,468 +0,0 @@
1/* $OpenBSD: d1_lib.c,v 1.27 2015/02/09 10:53:28 jsing Exp $ */
2/*
3 * DTLS implementation written by Nagendra Modadugu
4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.
5 */
6/* ====================================================================
7 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * openssl-core@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60#include <sys/types.h>
61#include <sys/socket.h>
62
63#include <netinet/in.h>
64
65#include <stdio.h>
66
67#include <openssl/objects.h>
68
69#include "pqueue.h"
70#include "ssl_locl.h"
71
72int dtls1_listen(SSL *s, struct sockaddr *client);
73
74SSL3_ENC_METHOD DTLSv1_enc_data = {
75 .enc = dtls1_enc,
76 .mac = tls1_mac,
77 .setup_key_block = tls1_setup_key_block,
78 .generate_master_secret = tls1_generate_master_secret,
79 .change_cipher_state = tls1_change_cipher_state,
80 .final_finish_mac = tls1_final_finish_mac,
81 .finish_mac_length = TLS1_FINISH_MAC_LENGTH,
82 .cert_verify_mac = tls1_cert_verify_mac,
83 .client_finished_label = TLS_MD_CLIENT_FINISH_CONST,
84 .client_finished_label_len = TLS_MD_CLIENT_FINISH_CONST_SIZE,
85 .server_finished_label = TLS_MD_SERVER_FINISH_CONST,
86 .server_finished_label_len = TLS_MD_SERVER_FINISH_CONST_SIZE,
87 .alert_value = tls1_alert_code,
88 .export_keying_material = tls1_export_keying_material,
89 .enc_flags = SSL_ENC_FLAG_DTLS|SSL_ENC_FLAG_EXPLICIT_IV,
90};
91
92long
93dtls1_default_timeout(void)
94{
95 /* 2 hours, the 24 hours mentioned in the DTLSv1 spec
96 * is way too long for http, the cache would over fill */
97 return (60*60*2);
98}
99
100int
101dtls1_new(SSL *s)
102{
103 DTLS1_STATE *d1;
104
105 if (!ssl3_new(s))
106 return (0);
107 if ((d1 = calloc(1, sizeof *d1)) == NULL) {
108 ssl3_free(s);
109 return (0);
110 }
111
112 /* d1->handshake_epoch=0; */
113
114 d1->unprocessed_rcds.q = pqueue_new();
115 d1->processed_rcds.q = pqueue_new();
116 d1->buffered_messages = pqueue_new();
117 d1->sent_messages = pqueue_new();
118 d1->buffered_app_data.q = pqueue_new();
119
120 if (s->server) {
121 d1->cookie_len = sizeof(s->d1->cookie);
122 }
123
124 if (!d1->unprocessed_rcds.q || !d1->processed_rcds.q ||
125 !d1->buffered_messages || !d1->sent_messages ||
126 !d1->buffered_app_data.q) {
127 if (d1->unprocessed_rcds.q)
128 pqueue_free(d1->unprocessed_rcds.q);
129 if (d1->processed_rcds.q)
130 pqueue_free(d1->processed_rcds.q);
131 if (d1->buffered_messages)
132 pqueue_free(d1->buffered_messages);
133 if (d1->sent_messages)
134 pqueue_free(d1->sent_messages);
135 if (d1->buffered_app_data.q)
136 pqueue_free(d1->buffered_app_data.q);
137 free(d1);
138 ssl3_free(s);
139 return (0);
140 }
141
142 s->d1 = d1;
143 s->method->ssl_clear(s);
144 return (1);
145}
146
147static void
148dtls1_clear_queues(SSL *s)
149{
150 pitem *item = NULL;
151 hm_fragment *frag = NULL;
152 DTLS1_RECORD_DATA *rdata;
153
154 while ((item = pqueue_pop(s->d1->unprocessed_rcds.q)) != NULL) {
155 rdata = (DTLS1_RECORD_DATA *) item->data;
156 free(rdata->rbuf.buf);
157 free(item->data);
158 pitem_free(item);
159 }
160
161 while ((item = pqueue_pop(s->d1->processed_rcds.q)) != NULL) {
162 rdata = (DTLS1_RECORD_DATA *) item->data;
163 free(rdata->rbuf.buf);
164 free(item->data);
165 pitem_free(item);
166 }
167
168 while ((item = pqueue_pop(s->d1->buffered_messages)) != NULL) {
169 frag = (hm_fragment *)item->data;
170 free(frag->fragment);
171 free(frag);
172 pitem_free(item);
173 }
174
175 while ((item = pqueue_pop(s->d1->sent_messages)) != NULL) {
176 frag = (hm_fragment *)item->data;
177 free(frag->fragment);
178 free(frag);
179 pitem_free(item);
180 }
181
182 while ((item = pqueue_pop(s->d1->buffered_app_data.q)) != NULL) {
183 rdata = (DTLS1_RECORD_DATA *) item->data;
184 free(rdata->rbuf.buf);
185 free(item->data);
186 pitem_free(item);
187 }
188}
189
190void
191dtls1_free(SSL *s)
192{
193 ssl3_free(s);
194
195 dtls1_clear_queues(s);
196
197 pqueue_free(s->d1->unprocessed_rcds.q);
198 pqueue_free(s->d1->processed_rcds.q);
199 pqueue_free(s->d1->buffered_messages);
200 pqueue_free(s->d1->sent_messages);
201 pqueue_free(s->d1->buffered_app_data.q);
202
203 OPENSSL_cleanse(s->d1, sizeof *s->d1);
204 free(s->d1);
205 s->d1 = NULL;
206}
207
208void
209dtls1_clear(SSL *s)
210{
211 pqueue unprocessed_rcds;
212 pqueue processed_rcds;
213 pqueue buffered_messages;
214 pqueue sent_messages;
215 pqueue buffered_app_data;
216 unsigned int mtu;
217
218 if (s->d1) {
219 unprocessed_rcds = s->d1->unprocessed_rcds.q;
220 processed_rcds = s->d1->processed_rcds.q;
221 buffered_messages = s->d1->buffered_messages;
222 sent_messages = s->d1->sent_messages;
223 buffered_app_data = s->d1->buffered_app_data.q;
224 mtu = s->d1->mtu;
225
226 dtls1_clear_queues(s);
227
228 memset(s->d1, 0, sizeof(*(s->d1)));
229
230 if (s->server) {
231 s->d1->cookie_len = sizeof(s->d1->cookie);
232 }
233
234 if (SSL_get_options(s) & SSL_OP_NO_QUERY_MTU) {
235 s->d1->mtu = mtu;
236 }
237
238 s->d1->unprocessed_rcds.q = unprocessed_rcds;
239 s->d1->processed_rcds.q = processed_rcds;
240 s->d1->buffered_messages = buffered_messages;
241 s->d1->sent_messages = sent_messages;
242 s->d1->buffered_app_data.q = buffered_app_data;
243 }
244
245 ssl3_clear(s);
246 if (s->options & SSL_OP_CISCO_ANYCONNECT)
247 s->version = DTLS1_BAD_VER;
248 else
249 s->version = DTLS1_VERSION;
250}
251
252long
253dtls1_ctrl(SSL *s, int cmd, long larg, void *parg)
254{
255 int ret = 0;
256
257 switch (cmd) {
258 case DTLS_CTRL_GET_TIMEOUT:
259 if (dtls1_get_timeout(s, (struct timeval*) parg) != NULL) {
260 ret = 1;
261 }
262 break;
263 case DTLS_CTRL_HANDLE_TIMEOUT:
264 ret = dtls1_handle_timeout(s);
265 break;
266 case DTLS_CTRL_LISTEN:
267 ret = dtls1_listen(s, parg);
268 break;
269
270 default:
271 ret = ssl3_ctrl(s, cmd, larg, parg);
272 break;
273 }
274 return (ret);
275}
276
277/*
278 * As it's impossible to use stream ciphers in "datagram" mode, this
279 * simple filter is designed to disengage them in DTLS. Unfortunately
280 * there is no universal way to identify stream SSL_CIPHER, so we have
281 * to explicitly list their SSL_* codes. Currently RC4 is the only one
282 * available, but if new ones emerge, they will have to be added...
283 */
284const SSL_CIPHER *
285dtls1_get_cipher(unsigned int u)
286{
287 const SSL_CIPHER *ciph = ssl3_get_cipher(u);
288
289 if (ciph != NULL) {
290 if (ciph->algorithm_enc == SSL_RC4)
291 return NULL;
292 }
293
294 return ciph;
295}
296
297void
298dtls1_start_timer(SSL *s)
299{
300
301 /* If timer is not set, initialize duration with 1 second */
302 if (s->d1->next_timeout.tv_sec == 0 && s->d1->next_timeout.tv_usec == 0) {
303 s->d1->timeout_duration = 1;
304 }
305
306 /* Set timeout to current time */
307 gettimeofday(&(s->d1->next_timeout), NULL);
308
309 /* Add duration to current time */
310 s->d1->next_timeout.tv_sec += s->d1->timeout_duration;
311 BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT, 0,
312 &(s->d1->next_timeout));
313}
314
315struct timeval*
316dtls1_get_timeout(SSL *s, struct timeval* timeleft)
317{
318 struct timeval timenow;
319
320 /* If no timeout is set, just return NULL */
321 if (s->d1->next_timeout.tv_sec == 0 && s->d1->next_timeout.tv_usec == 0) {
322 return NULL;
323 }
324
325 /* Get current time */
326 gettimeofday(&timenow, NULL);
327
328 /* If timer already expired, set remaining time to 0 */
329 if (s->d1->next_timeout.tv_sec < timenow.tv_sec ||
330 (s->d1->next_timeout.tv_sec == timenow.tv_sec &&
331 s->d1->next_timeout.tv_usec <= timenow.tv_usec)) {
332 memset(timeleft, 0, sizeof(struct timeval));
333 return timeleft;
334 }
335
336 /* Calculate time left until timer expires */
337 memcpy(timeleft, &(s->d1->next_timeout), sizeof(struct timeval));
338 timeleft->tv_sec -= timenow.tv_sec;
339 timeleft->tv_usec -= timenow.tv_usec;
340 if (timeleft->tv_usec < 0) {
341 timeleft->tv_sec--;
342 timeleft->tv_usec += 1000000;
343 }
344
345 /* If remaining time is less than 15 ms, set it to 0
346 * to prevent issues because of small devergences with
347 * socket timeouts.
348 */
349 if (timeleft->tv_sec == 0 && timeleft->tv_usec < 15000) {
350 memset(timeleft, 0, sizeof(struct timeval));
351 }
352
353
354 return timeleft;
355}
356
357int
358dtls1_is_timer_expired(SSL *s)
359{
360 struct timeval timeleft;
361
362 /* Get time left until timeout, return false if no timer running */
363 if (dtls1_get_timeout(s, &timeleft) == NULL) {
364 return 0;
365 }
366
367 /* Return false if timer is not expired yet */
368 if (timeleft.tv_sec > 0 || timeleft.tv_usec > 0) {
369 return 0;
370 }
371
372 /* Timer expired, so return true */
373 return 1;
374}
375
376void
377dtls1_double_timeout(SSL *s)
378{
379 s->d1->timeout_duration *= 2;
380 if (s->d1->timeout_duration > 60)
381 s->d1->timeout_duration = 60;
382 dtls1_start_timer(s);
383}
384
385void
386dtls1_stop_timer(SSL *s)
387{
388 /* Reset everything */
389 memset(&(s->d1->timeout), 0, sizeof(struct dtls1_timeout_st));
390 memset(&(s->d1->next_timeout), 0, sizeof(struct timeval));
391 s->d1->timeout_duration = 1;
392 BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT, 0,
393 &(s->d1->next_timeout));
394 /* Clear retransmission buffer */
395 dtls1_clear_record_buffer(s);
396}
397
398int
399dtls1_check_timeout_num(SSL *s)
400{
401 s->d1->timeout.num_alerts++;
402
403 /* Reduce MTU after 2 unsuccessful retransmissions */
404 if (s->d1->timeout.num_alerts > 2) {
405 s->d1->mtu = BIO_ctrl(SSL_get_wbio(s),
406 BIO_CTRL_DGRAM_GET_FALLBACK_MTU, 0, NULL);
407
408 }
409
410 if (s->d1->timeout.num_alerts > DTLS1_TMO_ALERT_COUNT) {
411 /* fail the connection, enough alerts have been sent */
412 SSLerr(SSL_F_DTLS1_CHECK_TIMEOUT_NUM, SSL_R_READ_TIMEOUT_EXPIRED);
413 return -1;
414 }
415
416 return 0;
417}
418
419int
420dtls1_handle_timeout(SSL *s)
421{
422 /* if no timer is expired, don't do anything */
423 if (!dtls1_is_timer_expired(s)) {
424 return 0;
425 }
426
427 dtls1_double_timeout(s);
428
429 if (dtls1_check_timeout_num(s) < 0)
430 return -1;
431
432 s->d1->timeout.read_timeouts++;
433 if (s->d1->timeout.read_timeouts > DTLS1_TMO_READ_COUNT) {
434 s->d1->timeout.read_timeouts = 1;
435 }
436
437 dtls1_start_timer(s);
438 return dtls1_retransmit_buffered_messages(s);
439}
440
441int
442dtls1_listen(SSL *s, struct sockaddr *client)
443{
444 int ret;
445
446 SSL_set_options(s, SSL_OP_COOKIE_EXCHANGE);
447 s->d1->listen = 1;
448
449 ret = SSL_accept(s);
450 if (ret <= 0)
451 return ret;
452
453 (void)BIO_dgram_get_peer(SSL_get_rbio(s), client);
454 return 1;
455}
456
457void
458dtls1_build_sequence_number(unsigned char *dst, unsigned char *seq,
459 unsigned short epoch)
460{
461 unsigned char dtlsseq[SSL3_SEQUENCE_SIZE];
462 unsigned char *p;
463
464 p = dtlsseq;
465 s2n(epoch, p);
466 memcpy(p, &seq[2], SSL3_SEQUENCE_SIZE - 2);
467 memcpy(dst, dtlsseq, SSL3_SEQUENCE_SIZE);
468}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 03:05:41 +0000