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1 | /* | |
2 | * Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include <stdio.h> | |
11 | #include <errno.h> | |
12 | #include "../ssl_local.h" | |
13 | #include <openssl/evp.h> | |
14 | #include <openssl/buffer.h> | |
15 | #include "record_local.h" | |
16 | #include "internal/packet.h" | |
17 | #include "internal/cryptlib.h" | |
18 | ||
19 | int DTLS_RECORD_LAYER_new(RECORD_LAYER *rl) | |
20 | { | |
21 | DTLS_RECORD_LAYER *d; | |
22 | ||
23 | if ((d = OPENSSL_malloc(sizeof(*d))) == NULL) { | |
24 | SSLerr(SSL_F_DTLS_RECORD_LAYER_NEW, ERR_R_MALLOC_FAILURE); | |
25 | return 0; | |
26 | } | |
27 | ||
28 | rl->d = d; | |
29 | ||
30 | d->unprocessed_rcds.q = pqueue_new(); | |
31 | d->processed_rcds.q = pqueue_new(); | |
32 | d->buffered_app_data.q = pqueue_new(); | |
33 | ||
34 | if (d->unprocessed_rcds.q == NULL || d->processed_rcds.q == NULL | |
35 | || d->buffered_app_data.q == NULL) { | |
36 | pqueue_free(d->unprocessed_rcds.q); | |
37 | pqueue_free(d->processed_rcds.q); | |
38 | pqueue_free(d->buffered_app_data.q); | |
39 | OPENSSL_free(d); | |
40 | rl->d = NULL; | |
41 | return 0; | |
42 | } | |
43 | ||
44 | return 1; | |
45 | } | |
46 | ||
47 | void DTLS_RECORD_LAYER_free(RECORD_LAYER *rl) | |
48 | { | |
49 | DTLS_RECORD_LAYER_clear(rl); | |
50 | pqueue_free(rl->d->unprocessed_rcds.q); | |
51 | pqueue_free(rl->d->processed_rcds.q); | |
52 | pqueue_free(rl->d->buffered_app_data.q); | |
53 | OPENSSL_free(rl->d); | |
54 | rl->d = NULL; | |
55 | } | |
56 | ||
57 | void DTLS_RECORD_LAYER_clear(RECORD_LAYER *rl) | |
58 | { | |
59 | DTLS_RECORD_LAYER *d; | |
60 | pitem *item = NULL; | |
61 | DTLS1_RECORD_DATA *rdata; | |
62 | pqueue *unprocessed_rcds; | |
63 | pqueue *processed_rcds; | |
64 | pqueue *buffered_app_data; | |
65 | ||
66 | d = rl->d; | |
67 | ||
68 | while ((item = pqueue_pop(d->unprocessed_rcds.q)) != NULL) { | |
69 | rdata = (DTLS1_RECORD_DATA *)item->data; | |
70 | OPENSSL_free(rdata->rbuf.buf); | |
71 | OPENSSL_free(item->data); | |
72 | pitem_free(item); | |
73 | } | |
74 | ||
75 | while ((item = pqueue_pop(d->processed_rcds.q)) != NULL) { | |
76 | rdata = (DTLS1_RECORD_DATA *)item->data; | |
77 | OPENSSL_free(rdata->rbuf.buf); | |
78 | OPENSSL_free(item->data); | |
79 | pitem_free(item); | |
80 | } | |
81 | ||
82 | while ((item = pqueue_pop(d->buffered_app_data.q)) != NULL) { | |
83 | rdata = (DTLS1_RECORD_DATA *)item->data; | |
84 | OPENSSL_free(rdata->rbuf.buf); | |
85 | OPENSSL_free(item->data); | |
86 | pitem_free(item); | |
87 | } | |
88 | ||
89 | unprocessed_rcds = d->unprocessed_rcds.q; | |
90 | processed_rcds = d->processed_rcds.q; | |
91 | buffered_app_data = d->buffered_app_data.q; | |
92 | memset(d, 0, sizeof(*d)); | |
93 | d->unprocessed_rcds.q = unprocessed_rcds; | |
94 | d->processed_rcds.q = processed_rcds; | |
95 | d->buffered_app_data.q = buffered_app_data; | |
96 | } | |
97 | ||
98 | void DTLS_RECORD_LAYER_set_saved_w_epoch(RECORD_LAYER *rl, unsigned short e) | |
99 | { | |
100 | if (e == rl->d->w_epoch - 1) { | |
101 | memcpy(rl->d->curr_write_sequence, | |
102 | rl->write_sequence, sizeof(rl->write_sequence)); | |
103 | memcpy(rl->write_sequence, | |
104 | rl->d->last_write_sequence, sizeof(rl->write_sequence)); | |
105 | } else if (e == rl->d->w_epoch + 1) { | |
106 | memcpy(rl->d->last_write_sequence, | |
107 | rl->write_sequence, sizeof(unsigned char[8])); | |
108 | memcpy(rl->write_sequence, | |
109 | rl->d->curr_write_sequence, sizeof(rl->write_sequence)); | |
110 | } | |
111 | rl->d->w_epoch = e; | |
112 | } | |
113 | ||
114 | void DTLS_RECORD_LAYER_set_write_sequence(RECORD_LAYER *rl, unsigned char *seq) | |
115 | { | |
116 | memcpy(rl->write_sequence, seq, SEQ_NUM_SIZE); | |
117 | } | |
118 | ||
119 | /* copy buffered record into SSL structure */ | |
120 | static int dtls1_copy_record(SSL *s, pitem *item) | |
121 | { | |
122 | DTLS1_RECORD_DATA *rdata; | |
123 | ||
124 | rdata = (DTLS1_RECORD_DATA *)item->data; | |
125 | ||
126 | SSL3_BUFFER_release(&s->rlayer.rbuf); | |
127 | ||
128 | s->rlayer.packet = rdata->packet; | |
129 | s->rlayer.packet_length = rdata->packet_length; | |
130 | memcpy(&s->rlayer.rbuf, &(rdata->rbuf), sizeof(SSL3_BUFFER)); | |
131 | memcpy(&s->rlayer.rrec, &(rdata->rrec), sizeof(SSL3_RECORD)); | |
132 | ||
133 | /* Set proper sequence number for mac calculation */ | |
134 | memcpy(&(s->rlayer.read_sequence[2]), &(rdata->packet[5]), 6); | |
135 | ||
136 | return 1; | |
137 | } | |
138 | ||
139 | int dtls1_buffer_record(SSL *s, record_pqueue *queue, unsigned char *priority) | |
140 | { | |
141 | DTLS1_RECORD_DATA *rdata; | |
142 | pitem *item; | |
143 | ||
144 | /* Limit the size of the queue to prevent DOS attacks */ | |
145 | if (pqueue_size(queue->q) >= 100) | |
146 | return 0; | |
147 | ||
148 | rdata = OPENSSL_malloc(sizeof(*rdata)); | |
149 | item = pitem_new(priority, rdata); | |
150 | if (rdata == NULL || item == NULL) { | |
151 | OPENSSL_free(rdata); | |
152 | pitem_free(item); | |
153 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_BUFFER_RECORD, | |
154 | ERR_R_INTERNAL_ERROR); | |
155 | return -1; | |
156 | } | |
157 | ||
158 | rdata->packet = s->rlayer.packet; | |
159 | rdata->packet_length = s->rlayer.packet_length; | |
160 | memcpy(&(rdata->rbuf), &s->rlayer.rbuf, sizeof(SSL3_BUFFER)); | |
161 | memcpy(&(rdata->rrec), &s->rlayer.rrec, sizeof(SSL3_RECORD)); | |
162 | ||
163 | item->data = rdata; | |
164 | ||
165 | #ifndef OPENSSL_NO_SCTP | |
166 | /* Store bio_dgram_sctp_rcvinfo struct */ | |
167 | if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && | |
168 | (SSL_get_state(s) == TLS_ST_SR_FINISHED | |
169 | || SSL_get_state(s) == TLS_ST_CR_FINISHED)) { | |
170 | BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_GET_RCVINFO, | |
171 | sizeof(rdata->recordinfo), &rdata->recordinfo); | |
172 | } | |
173 | #endif | |
174 | ||
175 | s->rlayer.packet = NULL; | |
176 | s->rlayer.packet_length = 0; | |
177 | memset(&s->rlayer.rbuf, 0, sizeof(s->rlayer.rbuf)); | |
178 | memset(&s->rlayer.rrec, 0, sizeof(s->rlayer.rrec)); | |
179 | ||
180 | if (!ssl3_setup_buffers(s)) { | |
181 | /* SSLfatal() already called */ | |
182 | OPENSSL_free(rdata->rbuf.buf); | |
183 | OPENSSL_free(rdata); | |
184 | pitem_free(item); | |
185 | return -1; | |
186 | } | |
187 | ||
188 | if (pqueue_insert(queue->q, item) == NULL) { | |
189 | /* Must be a duplicate so ignore it */ | |
190 | OPENSSL_free(rdata->rbuf.buf); | |
191 | OPENSSL_free(rdata); | |
192 | pitem_free(item); | |
193 | } | |
194 | ||
195 | return 1; | |
196 | } | |
197 | ||
198 | int dtls1_retrieve_buffered_record(SSL *s, record_pqueue *queue) | |
199 | { | |
200 | pitem *item; | |
201 | ||
202 | item = pqueue_pop(queue->q); | |
203 | if (item) { | |
204 | dtls1_copy_record(s, item); | |
205 | ||
206 | OPENSSL_free(item->data); | |
207 | pitem_free(item); | |
208 | ||
209 | return 1; | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | /* | |
216 | * retrieve a buffered record that belongs to the new epoch, i.e., not | |
217 | * processed yet | |
218 | */ | |
219 | #define dtls1_get_unprocessed_record(s) \ | |
220 | dtls1_retrieve_buffered_record((s), \ | |
221 | &((s)->rlayer.d->unprocessed_rcds)) | |
222 | ||
223 | int dtls1_process_buffered_records(SSL *s) | |
224 | { | |
225 | pitem *item; | |
226 | SSL3_BUFFER *rb; | |
227 | SSL3_RECORD *rr; | |
228 | DTLS1_BITMAP *bitmap; | |
229 | unsigned int is_next_epoch; | |
230 | int replayok = 1; | |
231 | ||
232 | item = pqueue_peek(s->rlayer.d->unprocessed_rcds.q); | |
233 | if (item) { | |
234 | /* Check if epoch is current. */ | |
235 | if (s->rlayer.d->unprocessed_rcds.epoch != s->rlayer.d->r_epoch) | |
236 | return 1; /* Nothing to do. */ | |
237 | ||
238 | rr = RECORD_LAYER_get_rrec(&s->rlayer); | |
239 | ||
240 | rb = RECORD_LAYER_get_rbuf(&s->rlayer); | |
241 | ||
242 | if (SSL3_BUFFER_get_left(rb) > 0) { | |
243 | /* | |
244 | * We've still got data from the current packet to read. There could | |
245 | * be a record from the new epoch in it - so don't overwrite it | |
246 | * with the unprocessed records yet (we'll do it when we've | |
247 | * finished reading the current packet). | |
248 | */ | |
249 | return 1; | |
250 | } | |
251 | ||
252 | /* Process all the records. */ | |
253 | while (pqueue_peek(s->rlayer.d->unprocessed_rcds.q)) { | |
254 | dtls1_get_unprocessed_record(s); | |
255 | bitmap = dtls1_get_bitmap(s, rr, &is_next_epoch); | |
256 | if (bitmap == NULL) { | |
257 | /* | |
258 | * Should not happen. This will only ever be NULL when the | |
259 | * current record is from a different epoch. But that cannot | |
260 | * be the case because we already checked the epoch above | |
261 | */ | |
262 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
263 | SSL_F_DTLS1_PROCESS_BUFFERED_RECORDS, | |
264 | ERR_R_INTERNAL_ERROR); | |
265 | return 0; | |
266 | } | |
267 | #ifndef OPENSSL_NO_SCTP | |
268 | /* Only do replay check if no SCTP bio */ | |
269 | if (!BIO_dgram_is_sctp(SSL_get_rbio(s))) | |
270 | #endif | |
271 | { | |
272 | /* | |
273 | * Check whether this is a repeat, or aged record. We did this | |
274 | * check once already when we first received the record - but | |
275 | * we might have updated the window since then due to | |
276 | * records we subsequently processed. | |
277 | */ | |
278 | replayok = dtls1_record_replay_check(s, bitmap); | |
279 | } | |
280 | ||
281 | if (!replayok || !dtls1_process_record(s, bitmap)) { | |
282 | if (ossl_statem_in_error(s)) { | |
283 | /* dtls1_process_record called SSLfatal() */ | |
284 | return -1; | |
285 | } | |
286 | /* dump this record */ | |
287 | rr->length = 0; | |
288 | RECORD_LAYER_reset_packet_length(&s->rlayer); | |
289 | continue; | |
290 | } | |
291 | ||
292 | if (dtls1_buffer_record(s, &(s->rlayer.d->processed_rcds), | |
293 | SSL3_RECORD_get_seq_num(s->rlayer.rrec)) < 0) { | |
294 | /* SSLfatal() already called */ | |
295 | return 0; | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | /* | |
301 | * sync epoch numbers once all the unprocessed records have been | |
302 | * processed | |
303 | */ | |
304 | s->rlayer.d->processed_rcds.epoch = s->rlayer.d->r_epoch; | |
305 | s->rlayer.d->unprocessed_rcds.epoch = s->rlayer.d->r_epoch + 1; | |
306 | ||
307 | return 1; | |
308 | } | |
309 | ||
310 | /*- | |
311 | * Return up to 'len' payload bytes received in 'type' records. | |
312 | * 'type' is one of the following: | |
313 | * | |
314 | * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us) | |
315 | * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us) | |
316 | * - 0 (during a shutdown, no data has to be returned) | |
317 | * | |
318 | * If we don't have stored data to work from, read a SSL/TLS record first | |
319 | * (possibly multiple records if we still don't have anything to return). | |
320 | * | |
321 | * This function must handle any surprises the peer may have for us, such as | |
322 | * Alert records (e.g. close_notify) or renegotiation requests. ChangeCipherSpec | |
323 | * messages are treated as if they were handshake messages *if* the |recd_type| | |
324 | * argument is non NULL. | |
325 | * Also if record payloads contain fragments too small to process, we store | |
326 | * them until there is enough for the respective protocol (the record protocol | |
327 | * may use arbitrary fragmentation and even interleaving): | |
328 | * Change cipher spec protocol | |
329 | * just 1 byte needed, no need for keeping anything stored | |
330 | * Alert protocol | |
331 | * 2 bytes needed (AlertLevel, AlertDescription) | |
332 | * Handshake protocol | |
333 | * 4 bytes needed (HandshakeType, uint24 length) -- we just have | |
334 | * to detect unexpected Client Hello and Hello Request messages | |
335 | * here, anything else is handled by higher layers | |
336 | * Application data protocol | |
337 | * none of our business | |
338 | */ | |
339 | int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, | |
340 | size_t len, int peek, size_t *readbytes) | |
341 | { | |
342 | int i, j, iret; | |
343 | size_t n; | |
344 | SSL3_RECORD *rr; | |
345 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; | |
346 | ||
347 | if (!SSL3_BUFFER_is_initialised(&s->rlayer.rbuf)) { | |
348 | /* Not initialized yet */ | |
349 | if (!ssl3_setup_buffers(s)) { | |
350 | /* SSLfatal() already called */ | |
351 | return -1; | |
352 | } | |
353 | } | |
354 | ||
355 | if ((type && (type != SSL3_RT_APPLICATION_DATA) && | |
356 | (type != SSL3_RT_HANDSHAKE)) || | |
357 | (peek && (type != SSL3_RT_APPLICATION_DATA))) { | |
358 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_READ_BYTES, | |
359 | ERR_R_INTERNAL_ERROR); | |
360 | return -1; | |
361 | } | |
362 | ||
363 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { | |
364 | /* type == SSL3_RT_APPLICATION_DATA */ | |
365 | i = s->handshake_func(s); | |
366 | /* SSLfatal() already called if appropriate */ | |
367 | if (i < 0) | |
368 | return i; | |
369 | if (i == 0) | |
370 | return -1; | |
371 | } | |
372 | ||
373 | start: | |
374 | s->rwstate = SSL_NOTHING; | |
375 | ||
376 | /*- | |
377 | * s->s3.rrec.type - is the type of record | |
378 | * s->s3.rrec.data, - data | |
379 | * s->s3.rrec.off, - offset into 'data' for next read | |
380 | * s->s3.rrec.length, - number of bytes. | |
381 | */ | |
382 | rr = s->rlayer.rrec; | |
383 | ||
384 | /* | |
385 | * We are not handshaking and have no data yet, so process data buffered | |
386 | * during the last handshake in advance, if any. | |
387 | */ | |
388 | if (SSL_is_init_finished(s) && SSL3_RECORD_get_length(rr) == 0) { | |
389 | pitem *item; | |
390 | item = pqueue_pop(s->rlayer.d->buffered_app_data.q); | |
391 | if (item) { | |
392 | #ifndef OPENSSL_NO_SCTP | |
393 | /* Restore bio_dgram_sctp_rcvinfo struct */ | |
394 | if (BIO_dgram_is_sctp(SSL_get_rbio(s))) { | |
395 | DTLS1_RECORD_DATA *rdata = (DTLS1_RECORD_DATA *)item->data; | |
396 | BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_SET_RCVINFO, | |
397 | sizeof(rdata->recordinfo), &rdata->recordinfo); | |
398 | } | |
399 | #endif | |
400 | ||
401 | dtls1_copy_record(s, item); | |
402 | ||
403 | OPENSSL_free(item->data); | |
404 | pitem_free(item); | |
405 | } | |
406 | } | |
407 | ||
408 | /* Check for timeout */ | |
409 | if (dtls1_handle_timeout(s) > 0) { | |
410 | goto start; | |
411 | } else if (ossl_statem_in_error(s)) { | |
412 | /* dtls1_handle_timeout() has failed with a fatal error */ | |
413 | return -1; | |
414 | } | |
415 | ||
416 | /* get new packet if necessary */ | |
417 | if ((SSL3_RECORD_get_length(rr) == 0) | |
418 | || (s->rlayer.rstate == SSL_ST_READ_BODY)) { | |
419 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); | |
420 | iret = dtls1_get_record(s); | |
421 | if (iret <= 0) { | |
422 | iret = dtls1_read_failed(s, iret); | |
423 | /* | |
424 | * Anything other than a timeout is an error. SSLfatal() already | |
425 | * called if appropriate. | |
426 | */ | |
427 | if (iret <= 0) | |
428 | return iret; | |
429 | else | |
430 | goto start; | |
431 | } | |
432 | RECORD_LAYER_set_numrpipes(&s->rlayer, 1); | |
433 | } | |
434 | ||
435 | /* | |
436 | * Reset the count of consecutive warning alerts if we've got a non-empty | |
437 | * record that isn't an alert. | |
438 | */ | |
439 | if (SSL3_RECORD_get_type(rr) != SSL3_RT_ALERT | |
440 | && SSL3_RECORD_get_length(rr) != 0) | |
441 | s->rlayer.alert_count = 0; | |
442 | ||
443 | /* we now have a packet which can be read and processed */ | |
444 | ||
445 | if (s->s3.change_cipher_spec /* set when we receive ChangeCipherSpec, | |
446 | * reset by ssl3_get_finished */ | |
447 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { | |
448 | /* | |
449 | * We now have application data between CCS and Finished. Most likely | |
450 | * the packets were reordered on their way, so buffer the application | |
451 | * data for later processing rather than dropping the connection. | |
452 | */ | |
453 | if (dtls1_buffer_record(s, &(s->rlayer.d->buffered_app_data), | |
454 | SSL3_RECORD_get_seq_num(rr)) < 0) { | |
455 | /* SSLfatal() already called */ | |
456 | return -1; | |
457 | } | |
458 | SSL3_RECORD_set_length(rr, 0); | |
459 | SSL3_RECORD_set_read(rr); | |
460 | goto start; | |
461 | } | |
462 | ||
463 | /* | |
464 | * If the other end has shut down, throw anything we read away (even in | |
465 | * 'peek' mode) | |
466 | */ | |
467 | if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { | |
468 | SSL3_RECORD_set_length(rr, 0); | |
469 | SSL3_RECORD_set_read(rr); | |
470 | s->rwstate = SSL_NOTHING; | |
471 | return 0; | |
472 | } | |
473 | ||
474 | if (type == SSL3_RECORD_get_type(rr) | |
475 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC | |
476 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) { | |
477 | /* | |
478 | * SSL3_RT_APPLICATION_DATA or | |
479 | * SSL3_RT_HANDSHAKE or | |
480 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
481 | */ | |
482 | /* | |
483 | * make sure that we are not getting application data when we are | |
484 | * doing a handshake for the first time | |
485 | */ | |
486 | if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) && | |
487 | (s->enc_read_ctx == NULL)) { | |
488 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, | |
489 | SSL_R_APP_DATA_IN_HANDSHAKE); | |
490 | return -1; | |
491 | } | |
492 | ||
493 | if (recvd_type != NULL) | |
494 | *recvd_type = SSL3_RECORD_get_type(rr); | |
495 | ||
496 | if (len == 0) { | |
497 | /* | |
498 | * Mark a zero length record as read. This ensures multiple calls to | |
499 | * SSL_read() with a zero length buffer will eventually cause | |
500 | * SSL_pending() to report data as being available. | |
501 | */ | |
502 | if (SSL3_RECORD_get_length(rr) == 0) | |
503 | SSL3_RECORD_set_read(rr); | |
504 | return 0; | |
505 | } | |
506 | ||
507 | if (len > SSL3_RECORD_get_length(rr)) | |
508 | n = SSL3_RECORD_get_length(rr); | |
509 | else | |
510 | n = len; | |
511 | ||
512 | memcpy(buf, &(SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]), n); | |
513 | if (peek) { | |
514 | if (SSL3_RECORD_get_length(rr) == 0) | |
515 | SSL3_RECORD_set_read(rr); | |
516 | } else { | |
517 | SSL3_RECORD_sub_length(rr, n); | |
518 | SSL3_RECORD_add_off(rr, n); | |
519 | if (SSL3_RECORD_get_length(rr) == 0) { | |
520 | s->rlayer.rstate = SSL_ST_READ_HEADER; | |
521 | SSL3_RECORD_set_off(rr, 0); | |
522 | SSL3_RECORD_set_read(rr); | |
523 | } | |
524 | } | |
525 | #ifndef OPENSSL_NO_SCTP | |
526 | /* | |
527 | * We might had to delay a close_notify alert because of reordered | |
528 | * app data. If there was an alert and there is no message to read | |
529 | * anymore, finally set shutdown. | |
530 | */ | |
531 | if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && | |
532 | s->d1->shutdown_received | |
533 | && !BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
534 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
535 | return 0; | |
536 | } | |
537 | #endif | |
538 | *readbytes = n; | |
539 | return 1; | |
540 | } | |
541 | ||
542 | /* | |
543 | * If we get here, then type != rr->type; if we have a handshake message, | |
544 | * then it was unexpected (Hello Request or Client Hello). | |
545 | */ | |
546 | ||
547 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) { | |
548 | unsigned int alert_level, alert_descr; | |
549 | unsigned char *alert_bytes = SSL3_RECORD_get_data(rr) | |
550 | + SSL3_RECORD_get_off(rr); | |
551 | PACKET alert; | |
552 | ||
553 | if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr)) | |
554 | || !PACKET_get_1(&alert, &alert_level) | |
555 | || !PACKET_get_1(&alert, &alert_descr) | |
556 | || PACKET_remaining(&alert) != 0) { | |
557 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, | |
558 | SSL_R_INVALID_ALERT); | |
559 | return -1; | |
560 | } | |
561 | ||
562 | if (s->msg_callback) | |
563 | s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s, | |
564 | s->msg_callback_arg); | |
565 | ||
566 | if (s->info_callback != NULL) | |
567 | cb = s->info_callback; | |
568 | else if (s->ctx->info_callback != NULL) | |
569 | cb = s->ctx->info_callback; | |
570 | ||
571 | if (cb != NULL) { | |
572 | j = (alert_level << 8) | alert_descr; | |
573 | cb(s, SSL_CB_READ_ALERT, j); | |
574 | } | |
575 | ||
576 | if (alert_level == SSL3_AL_WARNING) { | |
577 | s->s3.warn_alert = alert_descr; | |
578 | SSL3_RECORD_set_read(rr); | |
579 | ||
580 | s->rlayer.alert_count++; | |
581 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
582 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, | |
583 | SSL_R_TOO_MANY_WARN_ALERTS); | |
584 | return -1; | |
585 | } | |
586 | ||
587 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { | |
588 | #ifndef OPENSSL_NO_SCTP | |
589 | /* | |
590 | * With SCTP and streams the socket may deliver app data | |
591 | * after a close_notify alert. We have to check this first so | |
592 | * that nothing gets discarded. | |
593 | */ | |
594 | if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && | |
595 | BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
596 | s->d1->shutdown_received = 1; | |
597 | s->rwstate = SSL_READING; | |
598 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
599 | BIO_set_retry_read(SSL_get_rbio(s)); | |
600 | return -1; | |
601 | } | |
602 | #endif | |
603 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
604 | return 0; | |
605 | } | |
606 | } else if (alert_level == SSL3_AL_FATAL) { | |
607 | char tmp[16]; | |
608 | ||
609 | s->rwstate = SSL_NOTHING; | |
610 | s->s3.fatal_alert = alert_descr; | |
611 | SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_DTLS1_READ_BYTES, | |
612 | SSL_AD_REASON_OFFSET + alert_descr); | |
613 | BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr); | |
614 | ERR_add_error_data(2, "SSL alert number ", tmp); | |
615 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
616 | SSL3_RECORD_set_read(rr); | |
617 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
618 | return 0; | |
619 | } else { | |
620 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS1_READ_BYTES, | |
621 | SSL_R_UNKNOWN_ALERT_TYPE); | |
622 | return -1; | |
623 | } | |
624 | ||
625 | goto start; | |
626 | } | |
627 | ||
628 | if (s->shutdown & SSL_SENT_SHUTDOWN) { /* but we have not received a | |
629 | * shutdown */ | |
630 | s->rwstate = SSL_NOTHING; | |
631 | SSL3_RECORD_set_length(rr, 0); | |
632 | SSL3_RECORD_set_read(rr); | |
633 | return 0; | |
634 | } | |
635 | ||
636 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { | |
637 | /* | |
638 | * We can't process a CCS now, because previous handshake messages | |
639 | * are still missing, so just drop it. | |
640 | */ | |
641 | SSL3_RECORD_set_length(rr, 0); | |
642 | SSL3_RECORD_set_read(rr); | |
643 | goto start; | |
644 | } | |
645 | ||
646 | /* | |
647 | * Unexpected handshake message (Client Hello, or protocol violation) | |
648 | */ | |
649 | if ((SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) && | |
650 | !ossl_statem_get_in_handshake(s)) { | |
651 | struct hm_header_st msg_hdr; | |
652 | ||
653 | /* | |
654 | * This may just be a stale retransmit. Also sanity check that we have | |
655 | * at least enough record bytes for a message header | |
656 | */ | |
657 | if (SSL3_RECORD_get_epoch(rr) != s->rlayer.d->r_epoch | |
658 | || SSL3_RECORD_get_length(rr) < DTLS1_HM_HEADER_LENGTH) { | |
659 | SSL3_RECORD_set_length(rr, 0); | |
660 | SSL3_RECORD_set_read(rr); | |
661 | goto start; | |
662 | } | |
663 | ||
664 | dtls1_get_message_header(rr->data, &msg_hdr); | |
665 | ||
666 | /* | |
667 | * If we are server, we may have a repeated FINISHED of the client | |
668 | * here, then retransmit our CCS and FINISHED. | |
669 | */ | |
670 | if (msg_hdr.type == SSL3_MT_FINISHED) { | |
671 | if (dtls1_check_timeout_num(s) < 0) { | |
672 | /* SSLfatal) already called */ | |
673 | return -1; | |
674 | } | |
675 | ||
676 | if (dtls1_retransmit_buffered_messages(s) <= 0) { | |
677 | /* Fail if we encountered a fatal error */ | |
678 | if (ossl_statem_in_error(s)) | |
679 | return -1; | |
680 | } | |
681 | SSL3_RECORD_set_length(rr, 0); | |
682 | SSL3_RECORD_set_read(rr); | |
683 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
684 | if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) { | |
685 | /* no read-ahead left? */ | |
686 | BIO *bio; | |
687 | ||
688 | s->rwstate = SSL_READING; | |
689 | bio = SSL_get_rbio(s); | |
690 | BIO_clear_retry_flags(bio); | |
691 | BIO_set_retry_read(bio); | |
692 | return -1; | |
693 | } | |
694 | } | |
695 | goto start; | |
696 | } | |
697 | ||
698 | /* | |
699 | * To get here we must be trying to read app data but found handshake | |
700 | * data. But if we're trying to read app data, and we're not in init | |
701 | * (which is tested for at the top of this function) then init must be | |
702 | * finished | |
703 | */ | |
704 | if (!ossl_assert(SSL_is_init_finished(s))) { | |
705 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_READ_BYTES, | |
706 | ERR_R_INTERNAL_ERROR); | |
707 | return -1; | |
708 | } | |
709 | ||
710 | /* We found handshake data, so we're going back into init */ | |
711 | ossl_statem_set_in_init(s, 1); | |
712 | ||
713 | i = s->handshake_func(s); | |
714 | /* SSLfatal() called if appropriate */ | |
715 | if (i < 0) | |
716 | return i; | |
717 | if (i == 0) | |
718 | return -1; | |
719 | ||
720 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
721 | if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) { | |
722 | /* no read-ahead left? */ | |
723 | BIO *bio; | |
724 | /* | |
725 | * In the case where we try to read application data, but we | |
726 | * trigger an SSL handshake, we return -1 with the retry | |
727 | * option set. Otherwise renegotiation may cause nasty | |
728 | * problems in the blocking world | |
729 | */ | |
730 | s->rwstate = SSL_READING; | |
731 | bio = SSL_get_rbio(s); | |
732 | BIO_clear_retry_flags(bio); | |
733 | BIO_set_retry_read(bio); | |
734 | return -1; | |
735 | } | |
736 | } | |
737 | goto start; | |
738 | } | |
739 | ||
740 | switch (SSL3_RECORD_get_type(rr)) { | |
741 | default: | |
742 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, | |
743 | SSL_R_UNEXPECTED_RECORD); | |
744 | return -1; | |
745 | case SSL3_RT_CHANGE_CIPHER_SPEC: | |
746 | case SSL3_RT_ALERT: | |
747 | case SSL3_RT_HANDSHAKE: | |
748 | /* | |
749 | * we already handled all of these, with the possible exception of | |
750 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but | |
751 | * that should not happen when type != rr->type | |
752 | */ | |
753 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, | |
754 | ERR_R_INTERNAL_ERROR); | |
755 | return -1; | |
756 | case SSL3_RT_APPLICATION_DATA: | |
757 | /* | |
758 | * At this point, we were expecting handshake data, but have | |
759 | * application data. If the library was running inside ssl3_read() | |
760 | * (i.e. in_read_app_data is set) and it makes sense to read | |
761 | * application data at this point (session renegotiation not yet | |
762 | * started), we will indulge it. | |
763 | */ | |
764 | if (s->s3.in_read_app_data && | |
765 | (s->s3.total_renegotiations != 0) && | |
766 | ossl_statem_app_data_allowed(s)) { | |
767 | s->s3.in_read_app_data = 2; | |
768 | return -1; | |
769 | } else { | |
770 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, | |
771 | SSL_R_UNEXPECTED_RECORD); | |
772 | return -1; | |
773 | } | |
774 | } | |
775 | /* not reached */ | |
776 | } | |
777 | ||
778 | /* | |
779 | * Call this to write data in records of type 'type' It will return <= 0 if | |
780 | * not all data has been sent or non-blocking IO. | |
781 | */ | |
782 | int dtls1_write_bytes(SSL *s, int type, const void *buf, size_t len, | |
783 | size_t *written) | |
784 | { | |
785 | int i; | |
786 | ||
787 | if (!ossl_assert(len <= SSL3_RT_MAX_PLAIN_LENGTH)) { | |
788 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_WRITE_BYTES, | |
789 | ERR_R_INTERNAL_ERROR); | |
790 | return -1; | |
791 | } | |
792 | s->rwstate = SSL_NOTHING; | |
793 | i = do_dtls1_write(s, type, buf, len, 0, written); | |
794 | return i; | |
795 | } | |
796 | ||
797 | int do_dtls1_write(SSL *s, int type, const unsigned char *buf, | |
798 | size_t len, int create_empty_fragment, size_t *written) | |
799 | { | |
800 | unsigned char *p, *pseq; | |
801 | int i, mac_size, clear = 0; | |
802 | size_t prefix_len = 0; | |
803 | int eivlen; | |
804 | SSL3_RECORD wr; | |
805 | SSL3_BUFFER *wb; | |
806 | SSL_SESSION *sess; | |
807 | ||
808 | wb = &s->rlayer.wbuf[0]; | |
809 | ||
810 | /* | |
811 | * first check if there is a SSL3_BUFFER still being written out. This | |
812 | * will happen with non blocking IO | |
813 | */ | |
814 | if (!ossl_assert(SSL3_BUFFER_get_left(wb) == 0)) { | |
815 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, | |
816 | ERR_R_INTERNAL_ERROR); | |
817 | return 0; | |
818 | } | |
819 | ||
820 | /* If we have an alert to send, lets send it */ | |
821 | if (s->s3.alert_dispatch) { | |
822 | i = s->method->ssl_dispatch_alert(s); | |
823 | if (i <= 0) | |
824 | return i; | |
825 | /* if it went, fall through and send more stuff */ | |
826 | } | |
827 | ||
828 | if (len == 0 && !create_empty_fragment) | |
829 | return 0; | |
830 | ||
831 | if (len > ssl_get_max_send_fragment(s)) { | |
832 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, | |
833 | SSL_R_EXCEEDS_MAX_FRAGMENT_SIZE); | |
834 | return 0; | |
835 | } | |
836 | ||
837 | sess = s->session; | |
838 | ||
839 | if ((sess == NULL) || | |
840 | (s->enc_write_ctx == NULL) || (EVP_MD_CTX_md(s->write_hash) == NULL)) | |
841 | clear = 1; | |
842 | ||
843 | if (clear) | |
844 | mac_size = 0; | |
845 | else { | |
846 | mac_size = EVP_MD_CTX_size(s->write_hash); | |
847 | if (mac_size < 0) { | |
848 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, | |
849 | SSL_R_EXCEEDS_MAX_FRAGMENT_SIZE); | |
850 | return -1; | |
851 | } | |
852 | } | |
853 | ||
854 | p = SSL3_BUFFER_get_buf(wb) + prefix_len; | |
855 | ||
856 | /* write the header */ | |
857 | ||
858 | *(p++) = type & 0xff; | |
859 | SSL3_RECORD_set_type(&wr, type); | |
860 | /* | |
861 | * Special case: for hello verify request, client version 1.0 and we | |
862 | * haven't decided which version to use yet send back using version 1.0 | |
863 | * header: otherwise some clients will ignore it. | |
864 | */ | |
865 | if (s->method->version == DTLS_ANY_VERSION && | |
866 | s->max_proto_version != DTLS1_BAD_VER) { | |
867 | *(p++) = DTLS1_VERSION >> 8; | |
868 | *(p++) = DTLS1_VERSION & 0xff; | |
869 | } else { | |
870 | *(p++) = s->version >> 8; | |
871 | *(p++) = s->version & 0xff; | |
872 | } | |
873 | ||
874 | /* field where we are to write out packet epoch, seq num and len */ | |
875 | pseq = p; | |
876 | p += 10; | |
877 | ||
878 | /* Explicit IV length, block ciphers appropriate version flag */ | |
879 | if (s->enc_write_ctx) { | |
880 | int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); | |
881 | if (mode == EVP_CIPH_CBC_MODE) { | |
882 | eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); | |
883 | if (eivlen <= 1) | |
884 | eivlen = 0; | |
885 | } | |
886 | /* Need explicit part of IV for GCM mode */ | |
887 | else if (mode == EVP_CIPH_GCM_MODE) | |
888 | eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; | |
889 | else if (mode == EVP_CIPH_CCM_MODE) | |
890 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
891 | else | |
892 | eivlen = 0; | |
893 | } else | |
894 | eivlen = 0; | |
895 | ||
896 | /* lets setup the record stuff. */ | |
897 | SSL3_RECORD_set_data(&wr, p + eivlen); /* make room for IV in case of CBC */ | |
898 | SSL3_RECORD_set_length(&wr, len); | |
899 | SSL3_RECORD_set_input(&wr, (unsigned char *)buf); | |
900 | ||
901 | /* | |
902 | * we now 'read' from wr.input, wr.length bytes into wr.data | |
903 | */ | |
904 | ||
905 | /* first we compress */ | |
906 | if (s->compress != NULL) { | |
907 | if (!ssl3_do_compress(s, &wr)) { | |
908 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, | |
909 | SSL_R_COMPRESSION_FAILURE); | |
910 | return -1; | |
911 | } | |
912 | } else { | |
913 | memcpy(SSL3_RECORD_get_data(&wr), SSL3_RECORD_get_input(&wr), | |
914 | SSL3_RECORD_get_length(&wr)); | |
915 | SSL3_RECORD_reset_input(&wr); | |
916 | } | |
917 | ||
918 | /* | |
919 | * we should still have the output to wr.data and the input from | |
920 | * wr.input. Length should be wr.length. wr.data still points in the | |
921 | * wb->buf | |
922 | */ | |
923 | ||
924 | if (!SSL_WRITE_ETM(s) && mac_size != 0) { | |
925 | if (!s->method->ssl3_enc->mac(s, &wr, | |
926 | &(p[SSL3_RECORD_get_length(&wr) + eivlen]), | |
927 | 1)) { | |
928 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, | |
929 | ERR_R_INTERNAL_ERROR); | |
930 | return -1; | |
931 | } | |
932 | SSL3_RECORD_add_length(&wr, mac_size); | |
933 | } | |
934 | ||
935 | /* this is true regardless of mac size */ | |
936 | SSL3_RECORD_set_data(&wr, p); | |
937 | SSL3_RECORD_reset_input(&wr); | |
938 | ||
939 | if (eivlen) | |
940 | SSL3_RECORD_add_length(&wr, eivlen); | |
941 | ||
942 | if (s->method->ssl3_enc->enc(s, &wr, 1, 1, NULL, mac_size) < 1) { | |
943 | if (!ossl_statem_in_error(s)) { | |
944 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, | |
945 | ERR_R_INTERNAL_ERROR); | |
946 | } | |
947 | return -1; | |
948 | } | |
949 | ||
950 | if (SSL_WRITE_ETM(s) && mac_size != 0) { | |
951 | if (!s->method->ssl3_enc->mac(s, &wr, | |
952 | &(p[SSL3_RECORD_get_length(&wr)]), 1)) { | |
953 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, | |
954 | ERR_R_INTERNAL_ERROR); | |
955 | return -1; | |
956 | } | |
957 | SSL3_RECORD_add_length(&wr, mac_size); | |
958 | } | |
959 | ||
960 | /* record length after mac and block padding */ | |
961 | ||
962 | /* there's only one epoch between handshake and app data */ | |
963 | ||
964 | s2n(s->rlayer.d->w_epoch, pseq); | |
965 | ||
966 | memcpy(pseq, &(s->rlayer.write_sequence[2]), 6); | |
967 | pseq += 6; | |
968 | s2n(SSL3_RECORD_get_length(&wr), pseq); | |
969 | ||
970 | if (s->msg_callback) | |
971 | s->msg_callback(1, 0, SSL3_RT_HEADER, pseq - DTLS1_RT_HEADER_LENGTH, | |
972 | DTLS1_RT_HEADER_LENGTH, s, s->msg_callback_arg); | |
973 | ||
974 | /* | |
975 | * we should now have wr.data pointing to the encrypted data, which is | |
976 | * wr->length long | |
977 | */ | |
978 | SSL3_RECORD_set_type(&wr, type); /* not needed but helps for debugging */ | |
979 | SSL3_RECORD_add_length(&wr, DTLS1_RT_HEADER_LENGTH); | |
980 | ||
981 | ssl3_record_sequence_update(&(s->rlayer.write_sequence[0])); | |
982 | ||
983 | if (create_empty_fragment) { | |
984 | /* | |
985 | * we are in a recursive call; just return the length, don't write | |
986 | * out anything here | |
987 | */ | |
988 | *written = wr.length; | |
989 | return 1; | |
990 | } | |
991 | ||
992 | /* now let's set up wb */ | |
993 | SSL3_BUFFER_set_left(wb, prefix_len + SSL3_RECORD_get_length(&wr)); | |
994 | SSL3_BUFFER_set_offset(wb, 0); | |
995 | ||
996 | /* | |
997 | * memorize arguments so that ssl3_write_pending can detect bad write | |
998 | * retries later | |
999 | */ | |
1000 | s->rlayer.wpend_tot = len; | |
1001 | s->rlayer.wpend_buf = buf; | |
1002 | s->rlayer.wpend_type = type; | |
1003 | s->rlayer.wpend_ret = len; | |
1004 | ||
1005 | /* we now just need to write the buffer. Calls SSLfatal() as required. */ | |
1006 | return ssl3_write_pending(s, type, buf, len, written); | |
1007 | } | |
1008 | ||
1009 | DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, | |
1010 | unsigned int *is_next_epoch) | |
1011 | { | |
1012 | ||
1013 | *is_next_epoch = 0; | |
1014 | ||
1015 | /* In current epoch, accept HM, CCS, DATA, & ALERT */ | |
1016 | if (rr->epoch == s->rlayer.d->r_epoch) | |
1017 | return &s->rlayer.d->bitmap; | |
1018 | ||
1019 | /* | |
1020 | * Only HM and ALERT messages can be from the next epoch and only if we | |
1021 | * have already processed all of the unprocessed records from the last | |
1022 | * epoch | |
1023 | */ | |
1024 | else if (rr->epoch == (unsigned long)(s->rlayer.d->r_epoch + 1) && | |
1025 | s->rlayer.d->unprocessed_rcds.epoch != s->rlayer.d->r_epoch && | |
1026 | (rr->type == SSL3_RT_HANDSHAKE || rr->type == SSL3_RT_ALERT)) { | |
1027 | *is_next_epoch = 1; | |
1028 | return &s->rlayer.d->next_bitmap; | |
1029 | } | |
1030 | ||
1031 | return NULL; | |
1032 | } | |
1033 | ||
1034 | void dtls1_reset_seq_numbers(SSL *s, int rw) | |
1035 | { | |
1036 | unsigned char *seq; | |
1037 | unsigned int seq_bytes = sizeof(s->rlayer.read_sequence); | |
1038 | ||
1039 | if (rw & SSL3_CC_READ) { | |
1040 | seq = s->rlayer.read_sequence; | |
1041 | s->rlayer.d->r_epoch++; | |
1042 | memcpy(&s->rlayer.d->bitmap, &s->rlayer.d->next_bitmap, | |
1043 | sizeof(s->rlayer.d->bitmap)); | |
1044 | memset(&s->rlayer.d->next_bitmap, 0, sizeof(s->rlayer.d->next_bitmap)); | |
1045 | ||
1046 | /* | |
1047 | * We must not use any buffered messages received from the previous | |
1048 | * epoch | |
1049 | */ | |
1050 | dtls1_clear_received_buffer(s); | |
1051 | } else { | |
1052 | seq = s->rlayer.write_sequence; | |
1053 | memcpy(s->rlayer.d->last_write_sequence, seq, | |
1054 | sizeof(s->rlayer.write_sequence)); | |
1055 | s->rlayer.d->w_epoch++; | |
1056 | } | |
1057 | ||
1058 | memset(seq, 0, seq_bytes); | |
1059 | } |