]>
Commit | Line | Data |
---|---|---|
0f113f3e | 1 | /* |
6ec5fce2 | 2 | * Copyright 2005-2018 The OpenSSL Project Authors. All Rights Reserved. |
0f113f3e | 3 | * |
2c18d164 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
846e33c7 RS |
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 | |
36d16f8e BL |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
11 | #include <errno.h> | |
706457b7 | 12 | #include "../ssl_local.h" |
36d16f8e BL |
13 | #include <openssl/evp.h> |
14 | #include <openssl/buffer.h> | |
706457b7 | 15 | #include "record_local.h" |
0d345f0e | 16 | #include "internal/packet.h" |
67dc995e | 17 | #include "internal/cryptlib.h" |
40f37188 MC |
18 | |
19 | int DTLS_RECORD_LAYER_new(RECORD_LAYER *rl) | |
20 | { | |
21 | DTLS_RECORD_LAYER *d; | |
0485d540 | 22 | |
fe1128dc RS |
23 | if ((d = OPENSSL_malloc(sizeof(*d))) == NULL) { |
24 | SSLerr(SSL_F_DTLS_RECORD_LAYER_NEW, ERR_R_MALLOC_FAILURE); | |
26a7d938 | 25 | return 0; |
fe1128dc | 26 | } |
40f37188 MC |
27 | |
28 | rl->d = d; | |
5fb6f80c | 29 | |
cb2ce7ab MC |
30 | d->unprocessed_rcds.q = pqueue_new(); |
31 | d->processed_rcds.q = pqueue_new(); | |
24a1e2f2 | 32 | d->buffered_app_data.q = pqueue_new(); |
cb2ce7ab | 33 | |
a71edf3b MC |
34 | if (d->unprocessed_rcds.q == NULL || d->processed_rcds.q == NULL |
35 | || d->buffered_app_data.q == NULL) { | |
25aaa98a RS |
36 | pqueue_free(d->unprocessed_rcds.q); |
37 | pqueue_free(d->processed_rcds.q); | |
38 | pqueue_free(d->buffered_app_data.q); | |
cb2ce7ab MC |
39 | OPENSSL_free(d); |
40 | rl->d = NULL; | |
26a7d938 | 41 | return 0; |
cb2ce7ab | 42 | } |
40f37188 MC |
43 | |
44 | return 1; | |
45 | } | |
46 | ||
47 | void DTLS_RECORD_LAYER_free(RECORD_LAYER *rl) | |
48 | { | |
cb2ce7ab MC |
49 | DTLS_RECORD_LAYER_clear(rl); |
50 | pqueue_free(rl->d->unprocessed_rcds.q); | |
51 | pqueue_free(rl->d->processed_rcds.q); | |
24a1e2f2 | 52 | pqueue_free(rl->d->buffered_app_data.q); |
40f37188 MC |
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; | |
cb2ce7ab MC |
60 | pitem *item = NULL; |
61 | DTLS1_RECORD_DATA *rdata; | |
cf2cede4 RS |
62 | pqueue *unprocessed_rcds; |
63 | pqueue *processed_rcds; | |
64 | pqueue *buffered_app_data; | |
cb2ce7ab | 65 | |
40f37188 | 66 | d = rl->d; |
0485d540 | 67 | |
cb2ce7ab MC |
68 | while ((item = pqueue_pop(d->unprocessed_rcds.q)) != NULL) { |
69 | rdata = (DTLS1_RECORD_DATA *)item->data; | |
b548a1f1 | 70 | OPENSSL_free(rdata->rbuf.buf); |
cb2ce7ab MC |
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; | |
b548a1f1 | 77 | OPENSSL_free(rdata->rbuf.buf); |
cb2ce7ab MC |
78 | OPENSSL_free(item->data); |
79 | pitem_free(item); | |
80 | } | |
81 | ||
24a1e2f2 MC |
82 | while ((item = pqueue_pop(d->buffered_app_data.q)) != NULL) { |
83 | rdata = (DTLS1_RECORD_DATA *)item->data; | |
b548a1f1 | 84 | OPENSSL_free(rdata->rbuf.buf); |
24a1e2f2 MC |
85 | OPENSSL_free(item->data); |
86 | pitem_free(item); | |
87 | } | |
88 | ||
cb2ce7ab MC |
89 | unprocessed_rcds = d->unprocessed_rcds.q; |
90 | processed_rcds = d->processed_rcds.q; | |
24a1e2f2 | 91 | buffered_app_data = d->buffered_app_data.q; |
b4faea50 | 92 | memset(d, 0, sizeof(*d)); |
cb2ce7ab MC |
93 | d->unprocessed_rcds.q = unprocessed_rcds; |
94 | d->processed_rcds.q = processed_rcds; | |
24a1e2f2 | 95 | d->buffered_app_data.q = buffered_app_data; |
40f37188 MC |
96 | } |
97 | ||
3bb8f87d MC |
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, | |
a230b26e | 102 | rl->write_sequence, sizeof(rl->write_sequence)); |
3bb8f87d | 103 | memcpy(rl->write_sequence, |
a230b26e | 104 | rl->d->last_write_sequence, sizeof(rl->write_sequence)); |
3bb8f87d MC |
105 | } else if (e == rl->d->w_epoch + 1) { |
106 | memcpy(rl->d->last_write_sequence, | |
a230b26e | 107 | rl->write_sequence, sizeof(unsigned char[8])); |
3bb8f87d | 108 | memcpy(rl->write_sequence, |
a230b26e | 109 | rl->d->curr_write_sequence, sizeof(rl->write_sequence)); |
3bb8f87d MC |
110 | } |
111 | rl->d->w_epoch = e; | |
112 | } | |
113 | ||
e3d0dae7 MC |
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 | ||
36d16f8e | 119 | /* copy buffered record into SSL structure */ |
0f113f3e MC |
120 | static int dtls1_copy_record(SSL *s, pitem *item) |
121 | { | |
36d16f8e BL |
122 | DTLS1_RECORD_DATA *rdata; |
123 | ||
124 | rdata = (DTLS1_RECORD_DATA *)item->data; | |
0f113f3e | 125 | |
88c23039 | 126 | SSL3_BUFFER_release(&s->rlayer.rbuf); |
0f113f3e | 127 | |
7a7048af MC |
128 | s->rlayer.packet = rdata->packet; |
129 | s->rlayer.packet_length = rdata->packet_length; | |
88c23039 MC |
130 | memcpy(&s->rlayer.rbuf, &(rdata->rbuf), sizeof(SSL3_BUFFER)); |
131 | memcpy(&s->rlayer.rrec, &(rdata->rrec), sizeof(SSL3_RECORD)); | |
36d16f8e | 132 | |
0f113f3e | 133 | /* Set proper sequence number for mac calculation */ |
de07f311 | 134 | memcpy(&(s->rlayer.read_sequence[2]), &(rdata->packet[5]), 6); |
0f113f3e | 135 | |
208fb891 | 136 | return 1; |
0f113f3e | 137 | } |
36d16f8e | 138 | |
6f7ae319 | 139 | int dtls1_buffer_record(SSL *s, record_pqueue *queue, unsigned char *priority) |
0f113f3e MC |
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 | ||
b4faea50 | 148 | rdata = OPENSSL_malloc(sizeof(*rdata)); |
0f113f3e MC |
149 | item = pitem_new(priority, rdata); |
150 | if (rdata == NULL || item == NULL) { | |
b548a1f1 | 151 | OPENSSL_free(rdata); |
25aaa98a | 152 | pitem_free(item); |
c2853382 MC |
153 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_BUFFER_RECORD, |
154 | ERR_R_INTERNAL_ERROR); | |
06c6a2b4 | 155 | return -1; |
0f113f3e MC |
156 | } |
157 | ||
7a7048af MC |
158 | rdata->packet = s->rlayer.packet; |
159 | rdata->packet_length = s->rlayer.packet_length; | |
88c23039 MC |
160 | memcpy(&(rdata->rbuf), &s->rlayer.rbuf, sizeof(SSL3_BUFFER)); |
161 | memcpy(&(rdata->rrec), &s->rlayer.rrec, sizeof(SSL3_RECORD)); | |
0f113f3e MC |
162 | |
163 | item->data = rdata; | |
36d16f8e | 164 | |
7e159e01 | 165 | #ifndef OPENSSL_NO_SCTP |
0f113f3e MC |
166 | /* Store bio_dgram_sctp_rcvinfo struct */ |
167 | if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && | |
5998e290 MC |
168 | (SSL_get_state(s) == TLS_ST_SR_FINISHED |
169 | || SSL_get_state(s) == TLS_ST_CR_FINISHED)) { | |
0f113f3e MC |
170 | BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_GET_RCVINFO, |
171 | sizeof(rdata->recordinfo), &rdata->recordinfo); | |
172 | } | |
7e159e01 DSH |
173 | #endif |
174 | ||
7a7048af MC |
175 | s->rlayer.packet = NULL; |
176 | s->rlayer.packet_length = 0; | |
16f8d4eb RS |
177 | memset(&s->rlayer.rbuf, 0, sizeof(s->rlayer.rbuf)); |
178 | memset(&s->rlayer.rrec, 0, sizeof(s->rlayer.rrec)); | |
0f113f3e MC |
179 | |
180 | if (!ssl3_setup_buffers(s)) { | |
c2853382 | 181 | /* SSLfatal() already called */ |
b548a1f1 | 182 | OPENSSL_free(rdata->rbuf.buf); |
0f113f3e MC |
183 | OPENSSL_free(rdata); |
184 | pitem_free(item); | |
26a7d938 | 185 | return -1; |
0f113f3e | 186 | } |
36d16f8e | 187 | |
0f113f3e | 188 | if (pqueue_insert(queue->q, item) == NULL) { |
840facc3 | 189 | /* Must be a duplicate so ignore it */ |
b548a1f1 | 190 | OPENSSL_free(rdata->rbuf.buf); |
0f113f3e MC |
191 | OPENSSL_free(rdata); |
192 | pitem_free(item); | |
0f113f3e | 193 | } |
36d16f8e | 194 | |
208fb891 | 195 | return 1; |
0f113f3e MC |
196 | } |
197 | ||
fe589e61 | 198 | int dtls1_retrieve_buffered_record(SSL *s, record_pqueue *queue) |
0f113f3e | 199 | { |
36d16f8e BL |
200 | pitem *item; |
201 | ||
202 | item = pqueue_pop(queue->q); | |
0f113f3e | 203 | if (item) { |
36d16f8e BL |
204 | dtls1_copy_record(s, item); |
205 | ||
206 | OPENSSL_free(item->data); | |
0f113f3e | 207 | pitem_free(item); |
36d16f8e | 208 | |
208fb891 | 209 | return 1; |
36d16f8e BL |
210 | } |
211 | ||
26a7d938 | 212 | return 0; |
0f113f3e | 213 | } |
36d16f8e | 214 | |
0f113f3e MC |
215 | /* |
216 | * retrieve a buffered record that belongs to the new epoch, i.e., not | |
217 | * processed yet | |
218 | */ | |
36d16f8e BL |
219 | #define dtls1_get_unprocessed_record(s) \ |
220 | dtls1_retrieve_buffered_record((s), \ | |
cb2ce7ab | 221 | &((s)->rlayer.d->unprocessed_rcds)) |
36d16f8e | 222 | |
fe589e61 | 223 | int dtls1_process_buffered_records(SSL *s) |
0f113f3e | 224 | { |
36d16f8e | 225 | pitem *item; |
738ad946 | 226 | SSL3_BUFFER *rb; |
1fb9fdc3 MC |
227 | SSL3_RECORD *rr; |
228 | DTLS1_BITMAP *bitmap; | |
229 | unsigned int is_next_epoch; | |
230 | int replayok = 1; | |
0f113f3e | 231 | |
cb2ce7ab | 232 | item = pqueue_peek(s->rlayer.d->unprocessed_rcds.q); |
0f113f3e | 233 | if (item) { |
36d16f8e | 234 | /* Check if epoch is current. */ |
cb2ce7ab | 235 | if (s->rlayer.d->unprocessed_rcds.epoch != s->rlayer.d->r_epoch) |
1fb9fdc3 MC |
236 | return 1; /* Nothing to do. */ |
237 | ||
238 | rr = RECORD_LAYER_get_rrec(&s->rlayer); | |
0f113f3e | 239 | |
738ad946 MC |
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 | ||
36d16f8e | 252 | /* Process all the records. */ |
cb2ce7ab | 253 | while (pqueue_peek(s->rlayer.d->unprocessed_rcds.q)) { |
36d16f8e | 254 | dtls1_get_unprocessed_record(s); |
1fb9fdc3 MC |
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 | */ | |
c2853382 MC |
262 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
263 | SSL_F_DTLS1_PROCESS_BUFFERED_RECORDS, | |
264 | ERR_R_INTERNAL_ERROR); | |
1fb9fdc3 MC |
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)) { | |
c2853382 MC |
282 | if (ossl_statem_in_error(s)) { |
283 | /* dtls1_process_record called SSLfatal() */ | |
284 | return -1; | |
285 | } | |
1fb9fdc3 MC |
286 | /* dump this record */ |
287 | rr->length = 0; | |
288 | RECORD_LAYER_reset_packet_length(&s->rlayer); | |
289 | continue; | |
290 | } | |
291 | ||
cb2ce7ab | 292 | if (dtls1_buffer_record(s, &(s->rlayer.d->processed_rcds), |
c2853382 MC |
293 | SSL3_RECORD_get_seq_num(s->rlayer.rrec)) < 0) { |
294 | /* SSLfatal() already called */ | |
1fb9fdc3 | 295 | return 0; |
c2853382 | 296 | } |
36d16f8e | 297 | } |
0f113f3e | 298 | } |
36d16f8e | 299 | |
0f113f3e MC |
300 | /* |
301 | * sync epoch numbers once all the unprocessed records have been | |
302 | * processed | |
303 | */ | |
cb2ce7ab MC |
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; | |
36d16f8e | 306 | |
1fb9fdc3 | 307 | return 1; |
0f113f3e | 308 | } |
36d16f8e | 309 | |
1d97c843 TH |
310 | /*- |
311 | * Return up to 'len' payload bytes received in 'type' records. | |
36d16f8e BL |
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 | |
c69f2adf MC |
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. | |
36d16f8e BL |
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 | */ | |
657da85e | 339 | int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf, |
02ba18a6 | 340 | size_t len, int peek, size_t *readbytes) |
0f113f3e | 341 | { |
c2853382 | 342 | int i, j, iret; |
bd990e25 | 343 | size_t n; |
0f113f3e MC |
344 | SSL3_RECORD *rr; |
345 | void (*cb) (const SSL *ssl, int type2, int val) = NULL; | |
346 | ||
88c23039 | 347 | if (!SSL3_BUFFER_is_initialised(&s->rlayer.rbuf)) { |
28d59af8 | 348 | /* Not initialized yet */ |
c2853382 MC |
349 | if (!ssl3_setup_buffers(s)) { |
350 | /* SSLfatal() already called */ | |
26a7d938 | 351 | return -1; |
c2853382 | 352 | } |
28d59af8 | 353 | } |
0f113f3e MC |
354 | |
355 | if ((type && (type != SSL3_RT_APPLICATION_DATA) && | |
356 | (type != SSL3_RT_HANDSHAKE)) || | |
357 | (peek && (type != SSL3_RT_APPLICATION_DATA))) { | |
921d84a0 MC |
358 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_READ_BYTES, |
359 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
360 | return -1; |
361 | } | |
362 | ||
66fab923 | 363 | if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) { |
0f113f3e MC |
364 | /* type == SSL3_RT_APPLICATION_DATA */ |
365 | i = s->handshake_func(s); | |
c2853382 | 366 | /* SSLfatal() already called if appropriate */ |
0f113f3e | 367 | if (i < 0) |
eda75751 | 368 | return i; |
c2853382 | 369 | if (i == 0) |
eda75751 | 370 | return -1; |
0f113f3e MC |
371 | } |
372 | ||
373 | start: | |
374 | s->rwstate = SSL_NOTHING; | |
375 | ||
50e735f9 | 376 | /*- |
555cbb32 TS |
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. | |
50e735f9 | 381 | */ |
94777c9c | 382 | rr = s->rlayer.rrec; |
0f113f3e MC |
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 | */ | |
49ae7423 | 388 | if (SSL_is_init_finished(s) && SSL3_RECORD_get_length(rr) == 0) { |
0f113f3e | 389 | pitem *item; |
24a1e2f2 | 390 | item = pqueue_pop(s->rlayer.d->buffered_app_data.q); |
0f113f3e | 391 | if (item) { |
7e159e01 | 392 | #ifndef OPENSSL_NO_SCTP |
0f113f3e MC |
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 | } | |
7e159e01 DSH |
399 | #endif |
400 | ||
0f113f3e MC |
401 | dtls1_copy_record(s, item); |
402 | ||
403 | OPENSSL_free(item->data); | |
404 | pitem_free(item); | |
405 | } | |
406 | } | |
407 | ||
408 | /* Check for timeout */ | |
d273b60b | 409 | if (dtls1_handle_timeout(s) > 0) { |
0f113f3e | 410 | goto start; |
d273b60b MC |
411 | } else if (ossl_statem_in_error(s)) { |
412 | /* dtls1_handle_timeout() has failed with a fatal error */ | |
413 | return -1; | |
414 | } | |
0f113f3e MC |
415 | |
416 | /* get new packet if necessary */ | |
747e1639 | 417 | if ((SSL3_RECORD_get_length(rr) == 0) |
a230b26e | 418 | || (s->rlayer.rstate == SSL_ST_READ_BODY)) { |
5b79813b | 419 | RECORD_LAYER_set_numrpipes(&s->rlayer, 0); |
eda75751 MC |
420 | iret = dtls1_get_record(s); |
421 | if (iret <= 0) { | |
422 | iret = dtls1_read_failed(s, iret); | |
c2853382 MC |
423 | /* |
424 | * Anything other than a timeout is an error. SSLfatal() already | |
425 | * called if appropriate. | |
426 | */ | |
eda75751 MC |
427 | if (iret <= 0) |
428 | return iret; | |
0f113f3e MC |
429 | else |
430 | goto start; | |
431 | } | |
5b79813b | 432 | RECORD_LAYER_set_numrpipes(&s->rlayer, 1); |
0f113f3e MC |
433 | } |
434 | ||
af58be76 MC |
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 | ||
0f113f3e MC |
443 | /* we now have a packet which can be read and processed */ |
444 | ||
555cbb32 TS |
445 | if (s->s3.change_cipher_spec /* set when we receive ChangeCipherSpec, |
446 | * reset by ssl3_get_finished */ | |
747e1639 | 447 | && (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) { |
0f113f3e MC |
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 | */ | |
24a1e2f2 | 453 | if (dtls1_buffer_record(s, &(s->rlayer.d->buffered_app_data), |
a230b26e | 454 | SSL3_RECORD_get_seq_num(rr)) < 0) { |
c2853382 | 455 | /* SSLfatal() already called */ |
0f113f3e MC |
456 | return -1; |
457 | } | |
747e1639 | 458 | SSL3_RECORD_set_length(rr, 0); |
66fab923 | 459 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
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) { | |
747e1639 | 468 | SSL3_RECORD_set_length(rr, 0); |
66fab923 | 469 | SSL3_RECORD_set_read(rr); |
0f113f3e | 470 | s->rwstate = SSL_NOTHING; |
eda75751 | 471 | return 0; |
0f113f3e MC |
472 | } |
473 | ||
c69f2adf | 474 | if (type == SSL3_RECORD_get_type(rr) |
a230b26e EK |
475 | || (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC |
476 | && type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) { | |
c69f2adf MC |
477 | /* |
478 | * SSL3_RT_APPLICATION_DATA or | |
479 | * SSL3_RT_HANDSHAKE or | |
480 | * SSL3_RT_CHANGE_CIPHER_SPEC | |
481 | */ | |
0f113f3e MC |
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)) { | |
c2853382 MC |
488 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, |
489 | SSL_R_APP_DATA_IN_HANDSHAKE); | |
490 | return -1; | |
0f113f3e | 491 | } |
7e159e01 | 492 | |
c69f2adf MC |
493 | if (recvd_type != NULL) |
494 | *recvd_type = SSL3_RECORD_get_type(rr); | |
495 | ||
66fab923 MC |
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); | |
eda75751 | 504 | return 0; |
66fab923 | 505 | } |
0f113f3e | 506 | |
eda75751 | 507 | if (len > SSL3_RECORD_get_length(rr)) |
747e1639 | 508 | n = SSL3_RECORD_get_length(rr); |
0f113f3e | 509 | else |
eda75751 | 510 | n = len; |
0f113f3e | 511 | |
747e1639 | 512 | memcpy(buf, &(SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]), n); |
66fab923 MC |
513 | if (peek) { |
514 | if (SSL3_RECORD_get_length(rr) == 0) | |
515 | SSL3_RECORD_set_read(rr); | |
516 | } else { | |
753be41d | 517 | SSL3_RECORD_sub_length(rr, n); |
747e1639 MC |
518 | SSL3_RECORD_add_off(rr, n); |
519 | if (SSL3_RECORD_get_length(rr) == 0) { | |
295c3f41 | 520 | s->rlayer.rstate = SSL_ST_READ_HEADER; |
747e1639 | 521 | SSL3_RECORD_set_off(rr, 0); |
66fab923 | 522 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
523 | } |
524 | } | |
7e159e01 | 525 | #ifndef OPENSSL_NO_SCTP |
0f113f3e MC |
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; | |
eda75751 | 535 | return 0; |
0f113f3e MC |
536 | } |
537 | #endif | |
02ba18a6 | 538 | *readbytes = n; |
eda75751 | 539 | return 1; |
0f113f3e MC |
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 | ||
bd990e25 MC |
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; | |
0f113f3e | 552 | |
bd990e25 MC |
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) { | |
c2853382 MC |
557 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, |
558 | SSL_R_INVALID_ALERT); | |
559 | return -1; | |
0f113f3e MC |
560 | } |
561 | ||
0f113f3e | 562 | if (s->msg_callback) |
bd990e25 | 563 | s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s, |
c661ac16 | 564 | s->msg_callback_arg); |
0f113f3e MC |
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 | ||
fd865cad | 576 | if (alert_level == SSL3_AL_WARNING) { |
555cbb32 | 577 | s->s3.warn_alert = alert_descr; |
66fab923 | 578 | SSL3_RECORD_set_read(rr); |
af58be76 MC |
579 | |
580 | s->rlayer.alert_count++; | |
581 | if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) { | |
c2853382 MC |
582 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, |
583 | SSL_R_TOO_MANY_WARN_ALERTS); | |
584 | return -1; | |
af58be76 MC |
585 | } |
586 | ||
0f113f3e | 587 | if (alert_descr == SSL_AD_CLOSE_NOTIFY) { |
7e159e01 | 588 | #ifndef OPENSSL_NO_SCTP |
0f113f3e MC |
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 | } | |
7e159e01 | 602 | #endif |
0f113f3e | 603 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; |
eda75751 | 604 | return 0; |
0f113f3e | 605 | } |
fd865cad | 606 | } else if (alert_level == SSL3_AL_FATAL) { |
0f113f3e MC |
607 | char tmp[16]; |
608 | ||
609 | s->rwstate = SSL_NOTHING; | |
555cbb32 | 610 | s->s3.fatal_alert = alert_descr; |
c2853382 MC |
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); | |
0f113f3e MC |
614 | ERR_add_error_data(2, "SSL alert number ", tmp); |
615 | s->shutdown |= SSL_RECEIVED_SHUTDOWN; | |
66fab923 | 616 | SSL3_RECORD_set_read(rr); |
e2bb9b9b | 617 | SSL_CTX_remove_session(s->session_ctx, s->session); |
eda75751 | 618 | return 0; |
0f113f3e | 619 | } else { |
c2853382 MC |
620 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_DTLS1_READ_BYTES, |
621 | SSL_R_UNKNOWN_ALERT_TYPE); | |
622 | return -1; | |
0f113f3e MC |
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; | |
747e1639 | 631 | SSL3_RECORD_set_length(rr, 0); |
66fab923 | 632 | SSL3_RECORD_set_read(rr); |
eda75751 | 633 | return 0; |
0f113f3e MC |
634 | } |
635 | ||
747e1639 | 636 | if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) { |
0f113f3e MC |
637 | /* |
638 | * We can't process a CCS now, because previous handshake messages | |
639 | * are still missing, so just drop it. | |
640 | */ | |
c69f2adf | 641 | SSL3_RECORD_set_length(rr, 0); |
66fab923 | 642 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
643 | goto start; |
644 | } | |
645 | ||
646 | /* | |
647 | * Unexpected handshake message (Client Hello, or protocol violation) | |
648 | */ | |
bd990e25 MC |
649 | if ((SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) && |
650 | !ossl_statem_get_in_handshake(s)) { | |
0f113f3e MC |
651 | struct hm_header_st msg_hdr; |
652 | ||
bd990e25 MC |
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) { | |
747e1639 | 659 | SSL3_RECORD_set_length(rr, 0); |
66fab923 | 660 | SSL3_RECORD_set_read(rr); |
0f113f3e MC |
661 | goto start; |
662 | } | |
663 | ||
bd990e25 MC |
664 | dtls1_get_message_header(rr->data, &msg_hdr); |
665 | ||
0f113f3e MC |
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) { | |
c2853382 MC |
671 | if (dtls1_check_timeout_num(s) < 0) { |
672 | /* SSLfatal) already called */ | |
0f113f3e | 673 | return -1; |
c2853382 | 674 | } |
0f113f3e | 675 | |
d273b60b MC |
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; | |
d273b60b | 680 | } |
747e1639 | 681 | SSL3_RECORD_set_length(rr, 0); |
66fab923 | 682 | SSL3_RECORD_set_read(rr); |
ad962252 MC |
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 | } | |
0f113f3e MC |
695 | goto start; |
696 | } | |
697 | ||
c7f47786 MC |
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 | */ | |
b77f3ed1 | 704 | if (!ossl_assert(SSL_is_init_finished(s))) { |
c2853382 MC |
705 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_READ_BYTES, |
706 | ERR_R_INTERNAL_ERROR); | |
707 | return -1; | |
0f113f3e | 708 | } |
c7f47786 MC |
709 | |
710 | /* We found handshake data, so we're going back into init */ | |
711 | ossl_statem_set_in_init(s, 1); | |
712 | ||
0f113f3e | 713 | i = s->handshake_func(s); |
c2853382 | 714 | /* SSLfatal() called if appropriate */ |
0f113f3e | 715 | if (i < 0) |
eda75751 | 716 | return i; |
c2853382 | 717 | if (i == 0) |
eda75751 | 718 | return -1; |
0f113f3e MC |
719 | |
720 | if (!(s->mode & SSL_MODE_AUTO_RETRY)) { | |
88c23039 | 721 | if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) { |
28d59af8 | 722 | /* no read-ahead left? */ |
0f113f3e MC |
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); | |
eda75751 | 734 | return -1; |
0f113f3e MC |
735 | } |
736 | } | |
737 | goto start; | |
738 | } | |
739 | ||
747e1639 | 740 | switch (SSL3_RECORD_get_type(rr)) { |
0f113f3e | 741 | default: |
c2853382 MC |
742 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, |
743 | SSL_R_UNEXPECTED_RECORD); | |
744 | return -1; | |
0f113f3e MC |
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 | |
024f543c MC |
750 | * SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but |
751 | * that should not happen when type != rr->type | |
0f113f3e | 752 | */ |
c2853382 MC |
753 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, |
754 | ERR_R_INTERNAL_ERROR); | |
755 | return -1; | |
0f113f3e MC |
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 | */ | |
555cbb32 TS |
764 | if (s->s3.in_read_app_data && |
765 | (s->s3.total_renegotiations != 0) && | |
fe3a3291 | 766 | ossl_statem_app_data_allowed(s)) { |
555cbb32 | 767 | s->s3.in_read_app_data = 2; |
eda75751 | 768 | return -1; |
0f113f3e | 769 | } else { |
c2853382 MC |
770 | SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_DTLS1_READ_BYTES, |
771 | SSL_R_UNEXPECTED_RECORD); | |
772 | return -1; | |
0f113f3e MC |
773 | } |
774 | } | |
775 | /* not reached */ | |
0f113f3e MC |
776 | } |
777 | ||
0f113f3e MC |
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. | |
36d16f8e | 781 | */ |
7ee8627f MC |
782 | int dtls1_write_bytes(SSL *s, int type, const void *buf, size_t len, |
783 | size_t *written) | |
0f113f3e MC |
784 | { |
785 | int i; | |
786 | ||
42bd7a16 | 787 | if (!ossl_assert(len <= SSL3_RT_MAX_PLAIN_LENGTH)) { |
5591a613 MC |
788 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DTLS1_WRITE_BYTES, |
789 | ERR_R_INTERNAL_ERROR); | |
380a522f | 790 | return -1; |
42bd7a16 | 791 | } |
0f113f3e | 792 | s->rwstate = SSL_NOTHING; |
7ee8627f | 793 | i = do_dtls1_write(s, type, buf, len, 0, written); |
0f113f3e MC |
794 | return i; |
795 | } | |
796 | ||
797 | int do_dtls1_write(SSL *s, int type, const unsigned char *buf, | |
7ee8627f | 798 | size_t len, int create_empty_fragment, size_t *written) |
0f113f3e MC |
799 | { |
800 | unsigned char *p, *pseq; | |
801 | int i, mac_size, clear = 0; | |
7ee8627f | 802 | size_t prefix_len = 0; |
0f113f3e | 803 | int eivlen; |
f482740f | 804 | SSL3_RECORD wr; |
0f113f3e MC |
805 | SSL3_BUFFER *wb; |
806 | SSL_SESSION *sess; | |
807 | ||
d102d9df | 808 | wb = &s->rlayer.wbuf[0]; |
db9a32e7 | 809 | |
0f113f3e MC |
810 | /* |
811 | * first check if there is a SSL3_BUFFER still being written out. This | |
812 | * will happen with non blocking IO | |
813 | */ | |
380a522f | 814 | if (!ossl_assert(SSL3_BUFFER_get_left(wb) == 0)) { |
5591a613 MC |
815 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, |
816 | ERR_R_INTERNAL_ERROR); | |
380a522f | 817 | return 0; |
0f113f3e MC |
818 | } |
819 | ||
820 | /* If we have an alert to send, lets send it */ | |
555cbb32 | 821 | if (s->s3.alert_dispatch) { |
0f113f3e MC |
822 | i = s->method->ssl_dispatch_alert(s); |
823 | if (i <= 0) | |
7ee8627f | 824 | return i; |
0f113f3e MC |
825 | /* if it went, fall through and send more stuff */ |
826 | } | |
827 | ||
828 | if (len == 0 && !create_empty_fragment) | |
829 | return 0; | |
830 | ||
cf72c757 | 831 | if (len > ssl_get_max_send_fragment(s)) { |
5591a613 MC |
832 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, |
833 | SSL_R_EXCEEDS_MAX_FRAGMENT_SIZE); | |
aefb9256 MC |
834 | return 0; |
835 | } | |
836 | ||
0f113f3e MC |
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); | |
5591a613 MC |
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 | } | |
0f113f3e MC |
852 | } |
853 | ||
747e1639 | 854 | p = SSL3_BUFFER_get_buf(wb) + prefix_len; |
0f113f3e MC |
855 | |
856 | /* write the header */ | |
857 | ||
858 | *(p++) = type & 0xff; | |
f482740f | 859 | SSL3_RECORD_set_type(&wr, type); |
0f113f3e MC |
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 | */ | |
032924c4 | 865 | if (s->method->version == DTLS_ANY_VERSION && |
a230b26e | 866 | s->max_proto_version != DTLS1_BAD_VER) { |
0f113f3e MC |
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; | |
e75c5a79 DSH |
889 | else if (mode == EVP_CIPH_CCM_MODE) |
890 | eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN; | |
0f113f3e MC |
891 | else |
892 | eivlen = 0; | |
893 | } else | |
894 | eivlen = 0; | |
895 | ||
896 | /* lets setup the record stuff. */ | |
f482740f | 897 | SSL3_RECORD_set_data(&wr, p + eivlen); /* make room for IV in case of CBC */ |
7ee8627f | 898 | SSL3_RECORD_set_length(&wr, len); |
f482740f | 899 | SSL3_RECORD_set_input(&wr, (unsigned char *)buf); |
0f113f3e MC |
900 | |
901 | /* | |
f482740f | 902 | * we now 'read' from wr.input, wr.length bytes into wr.data |
0f113f3e MC |
903 | */ |
904 | ||
905 | /* first we compress */ | |
906 | if (s->compress != NULL) { | |
f482740f | 907 | if (!ssl3_do_compress(s, &wr)) { |
5591a613 MC |
908 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, |
909 | SSL_R_COMPRESSION_FAILURE); | |
910 | return -1; | |
0f113f3e MC |
911 | } |
912 | } else { | |
f482740f MC |
913 | memcpy(SSL3_RECORD_get_data(&wr), SSL3_RECORD_get_input(&wr), |
914 | SSL3_RECORD_get_length(&wr)); | |
915 | SSL3_RECORD_reset_input(&wr); | |
0f113f3e | 916 | } |
36d16f8e | 917 | |
0f113f3e | 918 | /* |
f482740f MC |
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 | |
0f113f3e MC |
921 | * wb->buf |
922 | */ | |
36d16f8e | 923 | |
28a31a0a | 924 | if (!SSL_WRITE_ETM(s) && mac_size != 0) { |
a14aa99b MC |
925 | if (!s->method->ssl3_enc->mac(s, &wr, |
926 | &(p[SSL3_RECORD_get_length(&wr) + eivlen]), | |
5591a613 MC |
927 | 1)) { |
928 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_DTLS1_WRITE, | |
929 | ERR_R_INTERNAL_ERROR); | |
930 | return -1; | |
931 | } | |
f482740f | 932 | SSL3_RECORD_add_length(&wr, mac_size); |
0f113f3e | 933 | } |
36d16f8e | 934 | |
0f113f3e | 935 | /* this is true regardless of mac size */ |
f482740f MC |
936 | SSL3_RECORD_set_data(&wr, p); |
937 | SSL3_RECORD_reset_input(&wr); | |
36d16f8e | 938 | |
0f113f3e | 939 | if (eivlen) |
f482740f | 940 | SSL3_RECORD_add_length(&wr, eivlen); |
36d16f8e | 941 | |
5591a613 | 942 | if (s->method->ssl3_enc->enc(s, &wr, 1, 1) < 1) { |
921d84a0 MC |
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 | } | |
5591a613 MC |
947 | return -1; |
948 | } | |
36d16f8e | 949 | |
28a31a0a | 950 | if (SSL_WRITE_ETM(s) && mac_size != 0) { |
a14aa99b | 951 | if (!s->method->ssl3_enc->mac(s, &wr, |
5591a613 MC |
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 | } | |
e23d5071 DW |
957 | SSL3_RECORD_add_length(&wr, mac_size); |
958 | } | |
959 | ||
0f113f3e | 960 | /* record length after mac and block padding */ |
36d16f8e | 961 | |
0f113f3e | 962 | /* there's only one epoch between handshake and app data */ |
36d16f8e | 963 | |
78a39fe7 | 964 | s2n(s->rlayer.d->w_epoch, pseq); |
36d16f8e | 965 | |
de07f311 | 966 | memcpy(pseq, &(s->rlayer.write_sequence[2]), 6); |
0f113f3e | 967 | pseq += 6; |
f482740f | 968 | s2n(SSL3_RECORD_get_length(&wr), pseq); |
36d16f8e | 969 | |
0f113f3e MC |
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); | |
36d16f8e | 973 | |
0f113f3e | 974 | /* |
f482740f | 975 | * we should now have wr.data pointing to the encrypted data, which is |
0f113f3e MC |
976 | * wr->length long |
977 | */ | |
f482740f MC |
978 | SSL3_RECORD_set_type(&wr, type); /* not needed but helps for debugging */ |
979 | SSL3_RECORD_add_length(&wr, DTLS1_RT_HEADER_LENGTH); | |
36d16f8e | 980 | |
de07f311 | 981 | ssl3_record_sequence_update(&(s->rlayer.write_sequence[0])); |
36d16f8e | 982 | |
0f113f3e MC |
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 | */ | |
7ee8627f MC |
988 | *written = wr.length; |
989 | return 1; | |
0f113f3e | 990 | } |
36d16f8e | 991 | |
0f113f3e | 992 | /* now let's set up wb */ |
f482740f | 993 | SSL3_BUFFER_set_left(wb, prefix_len + SSL3_RECORD_get_length(&wr)); |
747e1639 | 994 | SSL3_BUFFER_set_offset(wb, 0); |
0f113f3e MC |
995 | |
996 | /* | |
997 | * memorize arguments so that ssl3_write_pending can detect bad write | |
998 | * retries later | |
999 | */ | |
f8caa3c8 MC |
1000 | s->rlayer.wpend_tot = len; |
1001 | s->rlayer.wpend_buf = buf; | |
1002 | s->rlayer.wpend_type = type; | |
1003 | s->rlayer.wpend_ret = len; | |
0f113f3e | 1004 | |
c2853382 | 1005 | /* we now just need to write the buffer. Calls SSLfatal() as required. */ |
7ee8627f | 1006 | return ssl3_write_pending(s, type, buf, len, written); |
0f113f3e | 1007 | } |
36d16f8e | 1008 | |
fe589e61 | 1009 | DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, |
a230b26e | 1010 | unsigned int *is_next_epoch) |
0f113f3e MC |
1011 | { |
1012 | ||
36d16f8e BL |
1013 | *is_next_epoch = 0; |
1014 | ||
1015 | /* In current epoch, accept HM, CCS, DATA, & ALERT */ | |
78a39fe7 | 1016 | if (rr->epoch == s->rlayer.d->r_epoch) |
91f93f69 | 1017 | return &s->rlayer.d->bitmap; |
36d16f8e | 1018 | |
738ad946 MC |
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 | */ | |
78a39fe7 | 1024 | else if (rr->epoch == (unsigned long)(s->rlayer.d->r_epoch + 1) && |
738ad946 | 1025 | s->rlayer.d->unprocessed_rcds.epoch != s->rlayer.d->r_epoch && |
a230b26e | 1026 | (rr->type == SSL3_RT_HANDSHAKE || rr->type == SSL3_RT_ALERT)) { |
36d16f8e | 1027 | *is_next_epoch = 1; |
91f93f69 | 1028 | return &s->rlayer.d->next_bitmap; |
0f113f3e | 1029 | } |
36d16f8e BL |
1030 | |
1031 | return NULL; | |
0f113f3e | 1032 | } |
36d16f8e | 1033 | |
0f113f3e MC |
1034 | void dtls1_reset_seq_numbers(SSL *s, int rw) |
1035 | { | |
1036 | unsigned char *seq; | |
de07f311 | 1037 | unsigned int seq_bytes = sizeof(s->rlayer.read_sequence); |
0f113f3e MC |
1038 | |
1039 | if (rw & SSL3_CC_READ) { | |
de07f311 | 1040 | seq = s->rlayer.read_sequence; |
78a39fe7 | 1041 | s->rlayer.d->r_epoch++; |
16f8d4eb RS |
1042 | memcpy(&s->rlayer.d->bitmap, &s->rlayer.d->next_bitmap, |
1043 | sizeof(s->rlayer.d->bitmap)); | |
a230b26e | 1044 | memset(&s->rlayer.d->next_bitmap, 0, sizeof(s->rlayer.d->next_bitmap)); |
5cb4d646 MC |
1045 | |
1046 | /* | |
1047 | * We must not use any buffered messages received from the previous | |
1048 | * epoch | |
1049 | */ | |
1050 | dtls1_clear_received_buffer(s); | |
0f113f3e | 1051 | } else { |
de07f311 | 1052 | seq = s->rlayer.write_sequence; |
3bb8f87d | 1053 | memcpy(s->rlayer.d->last_write_sequence, seq, |
de07f311 | 1054 | sizeof(s->rlayer.write_sequence)); |
78a39fe7 | 1055 | s->rlayer.d->w_epoch++; |
0f113f3e MC |
1056 | } |
1057 | ||
16f8d4eb | 1058 | memset(seq, 0, seq_bytes); |
0f113f3e | 1059 | } |