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-rw-r--r--src/lib/libssl/ssl_pkt.c1324
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diff --git a/src/lib/libssl/ssl_pkt.c b/src/lib/libssl/ssl_pkt.c
deleted file mode 100644
index 728ac141e5..0000000000
--- a/src/lib/libssl/ssl_pkt.c
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@@ -1,1324 +0,0 @@
1/* $OpenBSD: ssl_pkt.c,v 1.65 2022/11/26 16:08:56 tb Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58/* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111
112#include <errno.h>
113#include <limits.h>
114#include <stdio.h>
115
116#include <openssl/buffer.h>
117#include <openssl/evp.h>
118
119#include "bytestring.h"
120#include "dtls_local.h"
121#include "ssl_local.h"
122#include "tls_content.h"
123
124static int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
125 unsigned int len);
126static int ssl3_get_record(SSL *s);
127
128/*
129 * Force a WANT_READ return for certain error conditions where
130 * we don't want to spin internally.
131 */
132void
133ssl_force_want_read(SSL *s)
134{
135 BIO *bio;
136
137 bio = SSL_get_rbio(s);
138 BIO_clear_retry_flags(bio);
139 BIO_set_retry_read(bio);
140
141 s->rwstate = SSL_READING;
142}
143
144/*
145 * If extend == 0, obtain new n-byte packet; if extend == 1, increase
146 * packet by another n bytes.
147 * The packet will be in the sub-array of s->s3->rbuf.buf specified
148 * by s->packet and s->packet_length.
149 * (If s->read_ahead is set, 'max' bytes may be stored in rbuf
150 * [plus s->packet_length bytes if extend == 1].)
151 */
152static int
153ssl3_read_n(SSL *s, int n, int max, int extend)
154{
155 SSL3_BUFFER_INTERNAL *rb = &(s->s3->rbuf);
156 int i, len, left;
157 size_t align;
158 unsigned char *pkt;
159
160 if (n <= 0)
161 return n;
162
163 if (rb->buf == NULL) {
164 if (!ssl3_setup_read_buffer(s))
165 return -1;
166 }
167 if (rb->buf == NULL)
168 return -1;
169
170 left = rb->left;
171 align = (size_t)rb->buf + SSL3_RT_HEADER_LENGTH;
172 align = (-align) & (SSL3_ALIGN_PAYLOAD - 1);
173
174 if (!extend) {
175 /* start with empty packet ... */
176 if (left == 0)
177 rb->offset = align;
178 else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH) {
179 /* check if next packet length is large
180 * enough to justify payload alignment... */
181 pkt = rb->buf + rb->offset;
182 if (pkt[0] == SSL3_RT_APPLICATION_DATA &&
183 (pkt[3]<<8|pkt[4]) >= 128) {
184 /* Note that even if packet is corrupted
185 * and its length field is insane, we can
186 * only be led to wrong decision about
187 * whether memmove will occur or not.
188 * Header values has no effect on memmove
189 * arguments and therefore no buffer
190 * overrun can be triggered. */
191 memmove(rb->buf + align, pkt, left);
192 rb->offset = align;
193 }
194 }
195 s->packet = rb->buf + rb->offset;
196 s->packet_length = 0;
197 /* ... now we can act as if 'extend' was set */
198 }
199
200 /* For DTLS/UDP reads should not span multiple packets
201 * because the read operation returns the whole packet
202 * at once (as long as it fits into the buffer). */
203 if (SSL_is_dtls(s)) {
204 if (left > 0 && n > left)
205 n = left;
206 }
207
208 /* if there is enough in the buffer from a previous read, take some */
209 if (left >= n) {
210 s->packet_length += n;
211 rb->left = left - n;
212 rb->offset += n;
213 return (n);
214 }
215
216 /* else we need to read more data */
217
218 len = s->packet_length;
219 pkt = rb->buf + align;
220 /* Move any available bytes to front of buffer:
221 * 'len' bytes already pointed to by 'packet',
222 * 'left' extra ones at the end */
223 if (s->packet != pkt) {
224 /* len > 0 */
225 memmove(pkt, s->packet, len + left);
226 s->packet = pkt;
227 rb->offset = len + align;
228 }
229
230 if (n > (int)(rb->len - rb->offset)) {
231 /* does not happen */
232 SSLerror(s, ERR_R_INTERNAL_ERROR);
233 return -1;
234 }
235
236 if (s->read_ahead || SSL_is_dtls(s)) {
237 if (max < n)
238 max = n;
239 if (max > (int)(rb->len - rb->offset))
240 max = rb->len - rb->offset;
241 } else {
242 /* ignore max parameter */
243 max = n;
244 }
245
246 while (left < n) {
247 /* Now we have len+left bytes at the front of s->s3->rbuf.buf
248 * and need to read in more until we have len+n (up to
249 * len+max if possible) */
250
251 errno = 0;
252 if (s->rbio != NULL) {
253 s->rwstate = SSL_READING;
254 i = BIO_read(s->rbio, pkt + len + left, max - left);
255 } else {
256 SSLerror(s, SSL_R_READ_BIO_NOT_SET);
257 i = -1;
258 }
259
260 if (i <= 0) {
261 rb->left = left;
262 if (s->mode & SSL_MODE_RELEASE_BUFFERS &&
263 !SSL_is_dtls(s)) {
264 if (len + left == 0)
265 ssl3_release_read_buffer(s);
266 }
267 return (i);
268 }
269 left += i;
270
271 /*
272 * reads should *never* span multiple packets for DTLS because
273 * the underlying transport protocol is message oriented as
274 * opposed to byte oriented as in the TLS case.
275 */
276 if (SSL_is_dtls(s)) {
277 if (n > left)
278 n = left; /* makes the while condition false */
279 }
280 }
281
282 /* done reading, now the book-keeping */
283 rb->offset += n;
284 rb->left = left - n;
285 s->packet_length += n;
286 s->rwstate = SSL_NOTHING;
287
288 return (n);
289}
290
291int
292ssl3_packet_read(SSL *s, int plen)
293{
294 int n;
295
296 n = ssl3_read_n(s, plen, s->s3->rbuf.len, 0);
297 if (n <= 0)
298 return n;
299 if (s->packet_length < plen)
300 return s->packet_length;
301
302 return plen;
303}
304
305int
306ssl3_packet_extend(SSL *s, int plen)
307{
308 int rlen, n;
309
310 if (s->packet_length >= plen)
311 return plen;
312 rlen = plen - s->packet_length;
313
314 n = ssl3_read_n(s, rlen, rlen, 1);
315 if (n <= 0)
316 return n;
317 if (s->packet_length < plen)
318 return s->packet_length;
319
320 return plen;
321}
322
323/* Call this to get a new input record.
324 * It will return <= 0 if more data is needed, normally due to an error
325 * or non-blocking IO.
326 * When it finishes, one packet has been decoded and can be found in
327 * ssl->s3->rrec.type - is the type of record
328 * ssl->s3->rrec.data, - data
329 * ssl->s3->rrec.length, - number of bytes
330 */
331/* used only by ssl3_read_bytes */
332static int
333ssl3_get_record(SSL *s)
334{
335 SSL3_BUFFER_INTERNAL *rb = &(s->s3->rbuf);
336 SSL3_RECORD_INTERNAL *rr = &(s->s3->rrec);
337 uint8_t alert_desc;
338 int al, n;
339 int ret = -1;
340
341 again:
342 /* check if we have the header */
343 if ((s->rstate != SSL_ST_READ_BODY) ||
344 (s->packet_length < SSL3_RT_HEADER_LENGTH)) {
345 CBS header;
346 uint16_t len, ssl_version;
347 uint8_t type;
348
349 n = ssl3_packet_read(s, SSL3_RT_HEADER_LENGTH);
350 if (n <= 0)
351 return (n);
352
353 s->mac_packet = 1;
354 s->rstate = SSL_ST_READ_BODY;
355
356 if (s->server && s->first_packet) {
357 if ((ret = ssl_server_legacy_first_packet(s)) != 1)
358 return (ret);
359 ret = -1;
360 }
361
362 CBS_init(&header, s->packet, SSL3_RT_HEADER_LENGTH);
363
364 /* Pull apart the header into the SSL3_RECORD_INTERNAL */
365 if (!CBS_get_u8(&header, &type) ||
366 !CBS_get_u16(&header, &ssl_version) ||
367 !CBS_get_u16(&header, &len)) {
368 SSLerror(s, SSL_R_BAD_PACKET_LENGTH);
369 goto err;
370 }
371
372 rr->type = type;
373 rr->length = len;
374
375 /* Lets check version */
376 if (!s->first_packet && ssl_version != s->version) {
377 if ((s->version & 0xFF00) == (ssl_version & 0xFF00) &&
378 !tls12_record_layer_write_protected(s->rl)) {
379 /* Send back error using their minor version number :-) */
380 s->version = ssl_version;
381 }
382 SSLerror(s, SSL_R_WRONG_VERSION_NUMBER);
383 al = SSL_AD_PROTOCOL_VERSION;
384 goto fatal_err;
385 }
386
387 if ((ssl_version >> 8) != SSL3_VERSION_MAJOR) {
388 SSLerror(s, SSL_R_WRONG_VERSION_NUMBER);
389 goto err;
390 }
391
392 if (rr->length > rb->len - SSL3_RT_HEADER_LENGTH) {
393 al = SSL_AD_RECORD_OVERFLOW;
394 SSLerror(s, SSL_R_PACKET_LENGTH_TOO_LONG);
395 goto fatal_err;
396 }
397 }
398
399 n = ssl3_packet_extend(s, SSL3_RT_HEADER_LENGTH + rr->length);
400 if (n <= 0)
401 return (n);
402 if (n != SSL3_RT_HEADER_LENGTH + rr->length)
403 return (n);
404
405 s->rstate = SSL_ST_READ_HEADER; /* set state for later operations */
406
407 /*
408 * A full record has now been read from the wire, which now needs
409 * to be processed.
410 */
411 tls12_record_layer_set_version(s->rl, s->version);
412
413 if (!tls12_record_layer_open_record(s->rl, s->packet, s->packet_length,
414 s->s3->rcontent)) {
415 tls12_record_layer_alert(s->rl, &alert_desc);
416
417 if (alert_desc == 0)
418 goto err;
419
420 if (alert_desc == SSL_AD_RECORD_OVERFLOW)
421 SSLerror(s, SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
422 else if (alert_desc == SSL_AD_BAD_RECORD_MAC)
423 SSLerror(s, SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
424
425 al = alert_desc;
426 goto fatal_err;
427 }
428
429 /* we have pulled in a full packet so zero things */
430 s->packet_length = 0;
431
432 if (tls_content_remaining(s->s3->rcontent) == 0) {
433 /*
434 * Zero-length fragments are only permitted for application
435 * data, as per RFC 5246 section 6.2.1.
436 */
437 if (rr->type != SSL3_RT_APPLICATION_DATA) {
438 SSLerror(s, SSL_R_BAD_LENGTH);
439 al = SSL_AD_UNEXPECTED_MESSAGE;
440 goto fatal_err;
441 }
442
443 tls_content_clear(s->s3->rcontent);
444
445 /*
446 * CBC countermeasures for known IV weaknesses can legitimately
447 * insert a single empty record, so we allow ourselves to read
448 * once past a single empty record without forcing want_read.
449 */
450 if (s->empty_record_count++ > SSL_MAX_EMPTY_RECORDS) {
451 SSLerror(s, SSL_R_PEER_BEHAVING_BADLY);
452 return -1;
453 }
454 if (s->empty_record_count > 1) {
455 ssl_force_want_read(s);
456 return -1;
457 }
458 goto again;
459 }
460
461 s->empty_record_count = 0;
462
463 return (1);
464
465 fatal_err:
466 ssl3_send_alert(s, SSL3_AL_FATAL, al);
467 err:
468 return (ret);
469}
470
471/* Call this to write data in records of type 'type'
472 * It will return <= 0 if not all data has been sent or non-blocking IO.
473 */
474int
475ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
476{
477 const unsigned char *buf = buf_;
478 unsigned int tot, n, nw;
479 int i;
480
481 if (len < 0) {
482 SSLerror(s, ERR_R_INTERNAL_ERROR);
483 return -1;
484 }
485
486 s->rwstate = SSL_NOTHING;
487 tot = s->s3->wnum;
488 s->s3->wnum = 0;
489
490 if (SSL_in_init(s) && !s->in_handshake) {
491 i = s->handshake_func(s);
492 if (i < 0)
493 return (i);
494 if (i == 0) {
495 SSLerror(s, SSL_R_SSL_HANDSHAKE_FAILURE);
496 return -1;
497 }
498 }
499
500 if (len < tot)
501 len = tot;
502 n = (len - tot);
503 for (;;) {
504 if (n > s->max_send_fragment)
505 nw = s->max_send_fragment;
506 else
507 nw = n;
508
509 i = do_ssl3_write(s, type, &(buf[tot]), nw);
510 if (i <= 0) {
511 s->s3->wnum = tot;
512 return i;
513 }
514
515 if ((i == (int)n) || (type == SSL3_RT_APPLICATION_DATA &&
516 (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) {
517 /*
518 * Next chunk of data should get another prepended
519 * empty fragment in ciphersuites with known-IV
520 * weakness.
521 */
522 s->s3->empty_fragment_done = 0;
523
524 return tot + i;
525 }
526
527 n -= i;
528 tot += i;
529 }
530}
531
532static int
533do_ssl3_write(SSL *s, int type, const unsigned char *buf, unsigned int len)
534{
535 SSL3_BUFFER_INTERNAL *wb = &(s->s3->wbuf);
536 SSL_SESSION *sess = s->session;
537 int need_empty_fragment = 0;
538 size_t align, out_len;
539 uint16_t version;
540 CBB cbb;
541 int ret;
542
543 memset(&cbb, 0, sizeof(cbb));
544
545 if (wb->buf == NULL)
546 if (!ssl3_setup_write_buffer(s))
547 return -1;
548
549 /*
550 * First check if there is a SSL3_BUFFER_INTERNAL still being written
551 * out. This will happen with non blocking IO.
552 */
553 if (wb->left != 0)
554 return (ssl3_write_pending(s, type, buf, len));
555
556 /* If we have an alert to send, let's send it. */
557 if (s->s3->alert_dispatch) {
558 if ((ret = ssl3_dispatch_alert(s)) <= 0)
559 return (ret);
560 /* If it went, fall through and send more stuff. */
561
562 /* We may have released our buffer, if so get it again. */
563 if (wb->buf == NULL)
564 if (!ssl3_setup_write_buffer(s))
565 return -1;
566 }
567
568 if (len == 0)
569 return 0;
570
571 /*
572 * Some servers hang if initial client hello is larger than 256
573 * bytes and record version number > TLS 1.0.
574 */
575 version = s->version;
576 if (s->s3->hs.state == SSL3_ST_CW_CLNT_HELLO_B &&
577 !s->renegotiate &&
578 s->s3->hs.our_max_tls_version > TLS1_VERSION)
579 version = TLS1_VERSION;
580
581 /*
582 * Countermeasure against known-IV weakness in CBC ciphersuites
583 * (see http://www.openssl.org/~bodo/tls-cbc.txt). Note that this
584 * is unnecessary for AEAD.
585 */
586 if (sess != NULL && tls12_record_layer_write_protected(s->rl)) {
587 if (s->s3->need_empty_fragments &&
588 !s->s3->empty_fragment_done &&
589 type == SSL3_RT_APPLICATION_DATA)
590 need_empty_fragment = 1;
591 }
592
593 /*
594 * An extra fragment would be a couple of cipher blocks, which would
595 * be a multiple of SSL3_ALIGN_PAYLOAD, so if we want to align the real
596 * payload, then we can just simply pretend we have two headers.
597 */
598 align = (size_t)wb->buf + SSL3_RT_HEADER_LENGTH;
599 if (need_empty_fragment)
600 align += SSL3_RT_HEADER_LENGTH;
601 align = (-align) & (SSL3_ALIGN_PAYLOAD - 1);
602 wb->offset = align;
603
604 if (!CBB_init_fixed(&cbb, wb->buf + align, wb->len - align))
605 goto err;
606
607 tls12_record_layer_set_version(s->rl, version);
608
609 if (need_empty_fragment) {
610 if (!tls12_record_layer_seal_record(s->rl, type,
611 buf, 0, &cbb))
612 goto err;
613 s->s3->empty_fragment_done = 1;
614 }
615
616 if (!tls12_record_layer_seal_record(s->rl, type, buf, len, &cbb))
617 goto err;
618
619 if (!CBB_finish(&cbb, NULL, &out_len))
620 goto err;
621
622 wb->left = out_len;
623
624 /*
625 * Memorize arguments so that ssl3_write_pending can detect
626 * bad write retries later.
627 */
628 s->s3->wpend_tot = len;
629 s->s3->wpend_buf = buf;
630 s->s3->wpend_type = type;
631 s->s3->wpend_ret = len;
632
633 /* We now just need to write the buffer. */
634 return ssl3_write_pending(s, type, buf, len);
635
636 err:
637 CBB_cleanup(&cbb);
638
639 return -1;
640}
641
642/* if s->s3->wbuf.left != 0, we need to call this */
643int
644ssl3_write_pending(SSL *s, int type, const unsigned char *buf, unsigned int len)
645{
646 int i;
647 SSL3_BUFFER_INTERNAL *wb = &(s->s3->wbuf);
648
649 /* XXXX */
650 if ((s->s3->wpend_tot > (int)len) || ((s->s3->wpend_buf != buf) &&
651 !(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)) ||
652 (s->s3->wpend_type != type)) {
653 SSLerror(s, SSL_R_BAD_WRITE_RETRY);
654 return (-1);
655 }
656
657 for (;;) {
658 errno = 0;
659 if (s->wbio != NULL) {
660 s->rwstate = SSL_WRITING;
661 i = BIO_write(s->wbio, (char *)&(wb->buf[wb->offset]),
662 (unsigned int)wb->left);
663 } else {
664 SSLerror(s, SSL_R_BIO_NOT_SET);
665 i = -1;
666 }
667 if (i == wb->left) {
668 wb->left = 0;
669 wb->offset += i;
670 if (s->mode & SSL_MODE_RELEASE_BUFFERS &&
671 !SSL_is_dtls(s))
672 ssl3_release_write_buffer(s);
673 s->rwstate = SSL_NOTHING;
674 return (s->s3->wpend_ret);
675 } else if (i <= 0) {
676 /*
677 * For DTLS, just drop it. That's kind of the
678 * whole point in using a datagram service.
679 */
680 if (SSL_is_dtls(s))
681 wb->left = 0;
682 return (i);
683 }
684 wb->offset += i;
685 wb->left -= i;
686 }
687}
688
689static ssize_t
690ssl3_read_cb(void *buf, size_t n, void *cb_arg)
691{
692 SSL *s = cb_arg;
693
694 return tls_content_read(s->s3->rcontent, buf, n);
695}
696
697#define SSL3_ALERT_LENGTH 2
698
699int
700ssl3_read_alert(SSL *s)
701{
702 uint8_t alert_level, alert_descr;
703 ssize_t ret;
704 CBS cbs;
705
706 /*
707 * TLSv1.2 permits an alert to be fragmented across multiple records or
708 * for multiple alerts to be be coalesced into a single alert record.
709 * In the case of DTLS, there is no way to reassemble an alert
710 * fragmented across multiple records, hence a full alert must be
711 * available in the record.
712 */
713 if (s->s3->alert_fragment == NULL) {
714 if ((s->s3->alert_fragment = tls_buffer_new(0)) == NULL)
715 return -1;
716 tls_buffer_set_capacity_limit(s->s3->alert_fragment,
717 SSL3_ALERT_LENGTH);
718 }
719 ret = tls_buffer_extend(s->s3->alert_fragment, SSL3_ALERT_LENGTH,
720 ssl3_read_cb, s);
721 if (ret <= 0 && ret != TLS_IO_WANT_POLLIN)
722 return -1;
723 if (ret != SSL3_ALERT_LENGTH) {
724 if (SSL_is_dtls(s)) {
725 SSLerror(s, SSL_R_BAD_LENGTH);
726 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
727 return -1;
728 }
729 return 1;
730 }
731
732 if (!tls_buffer_data(s->s3->alert_fragment, &cbs))
733 return -1;
734
735 ssl_msg_callback_cbs(s, 0, SSL3_RT_ALERT, &cbs);
736
737 if (!CBS_get_u8(&cbs, &alert_level))
738 return -1;
739 if (!CBS_get_u8(&cbs, &alert_descr))
740 return -1;
741
742 tls_buffer_free(s->s3->alert_fragment);
743 s->s3->alert_fragment = NULL;
744
745 ssl_info_callback(s, SSL_CB_READ_ALERT,
746 (alert_level << 8) | alert_descr);
747
748 if (alert_level == SSL3_AL_WARNING) {
749 s->s3->warn_alert = alert_descr;
750 if (alert_descr == SSL_AD_CLOSE_NOTIFY) {
751 s->shutdown |= SSL_RECEIVED_SHUTDOWN;
752 return 0;
753 }
754 /* We requested renegotiation and the peer rejected it. */
755 if (alert_descr == SSL_AD_NO_RENEGOTIATION) {
756 SSLerror(s, SSL_R_NO_RENEGOTIATION);
757 ssl3_send_alert(s, SSL3_AL_FATAL,
758 SSL_AD_HANDSHAKE_FAILURE);
759 return -1;
760 }
761 } else if (alert_level == SSL3_AL_FATAL) {
762 s->rwstate = SSL_NOTHING;
763 s->s3->fatal_alert = alert_descr;
764 SSLerror(s, SSL_AD_REASON_OFFSET + alert_descr);
765 ERR_asprintf_error_data("SSL alert number %d", alert_descr);
766 s->shutdown |= SSL_RECEIVED_SHUTDOWN;
767 SSL_CTX_remove_session(s->ctx, s->session);
768 return 0;
769 } else {
770 SSLerror(s, SSL_R_UNKNOWN_ALERT_TYPE);
771 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
772 return -1;
773 }
774
775 return 1;
776}
777
778int
779ssl3_read_change_cipher_spec(SSL *s)
780{
781 const uint8_t ccs[1] = { SSL3_MT_CCS };
782
783 /*
784 * 'Change Cipher Spec' is just a single byte, so we know exactly what
785 * the record payload has to look like.
786 */
787 if (tls_content_remaining(s->s3->rcontent) != sizeof(ccs)) {
788 SSLerror(s, SSL_R_BAD_CHANGE_CIPHER_SPEC);
789 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
790 return -1;
791 }
792 if (!tls_content_equal(s->s3->rcontent, ccs, sizeof(ccs))) {
793 SSLerror(s, SSL_R_BAD_CHANGE_CIPHER_SPEC);
794 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
795 return -1;
796 }
797
798 /* XDTLS: check that epoch is consistent */
799
800 ssl_msg_callback_cbs(s, 0, SSL3_RT_CHANGE_CIPHER_SPEC,
801 tls_content_cbs(s->s3->rcontent));
802
803 /* Check that we have a cipher to change to. */
804 if (s->s3->hs.cipher == NULL) {
805 SSLerror(s, SSL_R_CCS_RECEIVED_EARLY);
806 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
807 return -1;
808 }
809
810 /* Check that we should be receiving a Change Cipher Spec. */
811 if (SSL_is_dtls(s)) {
812 if (!s->d1->change_cipher_spec_ok) {
813 /*
814 * We can't process a CCS now, because previous
815 * handshake messages are still missing, so just
816 * drop it.
817 */
818 tls_content_clear(s->s3->rcontent);
819 return 1;
820 }
821 s->d1->change_cipher_spec_ok = 0;
822 } else {
823 if ((s->s3->flags & SSL3_FLAGS_CCS_OK) == 0) {
824 SSLerror(s, SSL_R_CCS_RECEIVED_EARLY);
825 ssl3_send_alert(s, SSL3_AL_FATAL,
826 SSL_AD_UNEXPECTED_MESSAGE);
827 return -1;
828 }
829 s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
830 }
831
832 tls_content_clear(s->s3->rcontent);
833
834 s->s3->change_cipher_spec = 1;
835 if (!ssl3_do_change_cipher_spec(s))
836 return -1;
837
838 return 1;
839}
840
841static int
842ssl3_read_handshake_unexpected(SSL *s)
843{
844 uint32_t hs_msg_length;
845 uint8_t hs_msg_type;
846 ssize_t ssret;
847 CBS cbs;
848 int ret;
849
850 /*
851 * We need four bytes of handshake data so we have a handshake message
852 * header - this may be in the same record or fragmented across multiple
853 * records.
854 */
855 if (s->s3->handshake_fragment == NULL) {
856 if ((s->s3->handshake_fragment = tls_buffer_new(0)) == NULL)
857 return -1;
858 tls_buffer_set_capacity_limit(s->s3->handshake_fragment,
859 SSL3_HM_HEADER_LENGTH);
860 }
861 ssret = tls_buffer_extend(s->s3->handshake_fragment, SSL3_HM_HEADER_LENGTH,
862 ssl3_read_cb, s);
863 if (ssret <= 0 && ssret != TLS_IO_WANT_POLLIN)
864 return -1;
865 if (ssret != SSL3_HM_HEADER_LENGTH)
866 return 1;
867
868 if (s->in_handshake) {
869 SSLerror(s, ERR_R_INTERNAL_ERROR);
870 return -1;
871 }
872
873 /*
874 * This code currently deals with HelloRequest and ClientHello messages -
875 * anything else is pushed to the handshake_func. Almost all of this
876 * belongs in the client/server handshake code.
877 */
878
879 /* Parse handshake message header. */
880 if (!tls_buffer_data(s->s3->handshake_fragment, &cbs))
881 return -1;
882 if (!CBS_get_u8(&cbs, &hs_msg_type))
883 return -1;
884 if (!CBS_get_u24(&cbs, &hs_msg_length))
885 return -1;
886
887 if (hs_msg_type == SSL3_MT_HELLO_REQUEST) {
888 /*
889 * Incoming HelloRequest messages should only be received by a
890 * client. A server may send these at any time - a client should
891 * ignore the message if received in the middle of a handshake.
892 * See RFC 5246 sections 7.4 and 7.4.1.1.
893 */
894 if (s->server) {
895 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
896 ssl3_send_alert(s, SSL3_AL_FATAL,
897 SSL_AD_UNEXPECTED_MESSAGE);
898 return -1;
899 }
900
901 if (hs_msg_length != 0) {
902 SSLerror(s, SSL_R_BAD_HELLO_REQUEST);
903 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
904 return -1;
905 }
906
907 if (!tls_buffer_data(s->s3->handshake_fragment, &cbs))
908 return -1;
909 ssl_msg_callback_cbs(s, 0, SSL3_RT_HANDSHAKE, &cbs);
910
911 tls_buffer_free(s->s3->handshake_fragment);
912 s->s3->handshake_fragment = NULL;
913
914 /*
915 * It should be impossible to hit this, but keep the safety
916 * harness for now...
917 */
918 if (s->session == NULL || s->session->cipher == NULL)
919 return 1;
920
921 /*
922 * Ignore this message if we're currently handshaking,
923 * renegotiation is already pending or renegotiation is disabled
924 * via flags.
925 */
926 if (!SSL_is_init_finished(s) || s->s3->renegotiate ||
927 (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) != 0)
928 return 1;
929
930 if (!ssl3_renegotiate(s))
931 return 1;
932 if (!ssl3_renegotiate_check(s))
933 return 1;
934
935 } else if (hs_msg_type == SSL3_MT_CLIENT_HELLO) {
936 /*
937 * Incoming ClientHello messages should only be received by a
938 * server. A client may send these in response to server
939 * initiated renegotiation (HelloRequest) or in order to
940 * initiate renegotiation by the client. See RFC 5246 section
941 * 7.4.1.2.
942 */
943 if (!s->server) {
944 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
945 ssl3_send_alert(s, SSL3_AL_FATAL,
946 SSL_AD_UNEXPECTED_MESSAGE);
947 return -1;
948 }
949
950 /*
951 * A client should not be sending a ClientHello unless we're not
952 * currently handshaking.
953 */
954 if (!SSL_is_init_finished(s)) {
955 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
956 ssl3_send_alert(s, SSL3_AL_FATAL,
957 SSL_AD_UNEXPECTED_MESSAGE);
958 return -1;
959 }
960
961 if ((s->options & SSL_OP_NO_CLIENT_RENEGOTIATION) != 0) {
962 ssl3_send_alert(s, SSL3_AL_FATAL,
963 SSL_AD_NO_RENEGOTIATION);
964 return -1;
965 }
966
967 if (s->session == NULL || s->session->cipher == NULL) {
968 SSLerror(s, ERR_R_INTERNAL_ERROR);
969 return -1;
970 }
971
972 /* Client requested renegotiation but it is not permitted. */
973 if (!s->s3->send_connection_binding ||
974 (s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) != 0) {
975 ssl3_send_alert(s, SSL3_AL_WARNING,
976 SSL_AD_NO_RENEGOTIATION);
977 return 1;
978 }
979
980 s->s3->hs.state = SSL_ST_ACCEPT;
981 s->renegotiate = 1;
982 s->new_session = 1;
983
984 } else {
985 SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
986 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
987 return -1;
988 }
989
990 if ((ret = s->handshake_func(s)) < 0)
991 return ret;
992 if (ret == 0) {
993 SSLerror(s, SSL_R_SSL_HANDSHAKE_FAILURE);
994 return -1;
995 }
996
997 if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
998 if (s->s3->rbuf.left == 0) {
999 ssl_force_want_read(s);
1000 return -1;
1001 }
1002 }
1003
1004 /*
1005 * We either finished a handshake or ignored the request, now try again
1006 * to obtain the (application) data we were asked for.
1007 */
1008 return 1;
1009}
1010
1011/* Return up to 'len' payload bytes received in 'type' records.
1012 * 'type' is one of the following:
1013 *
1014 * - SSL3_RT_HANDSHAKE (when ssl3_get_message calls us)
1015 * - SSL3_RT_APPLICATION_DATA (when ssl3_read calls us)
1016 * - 0 (during a shutdown, no data has to be returned)
1017 *
1018 * If we don't have stored data to work from, read a SSL/TLS record first
1019 * (possibly multiple records if we still don't have anything to return).
1020 *
1021 * This function must handle any surprises the peer may have for us, such as
1022 * Alert records (e.g. close_notify), ChangeCipherSpec records (not really
1023 * a surprise, but handled as if it were), or renegotiation requests.
1024 * Also if record payloads contain fragments too small to process, we store
1025 * them until there is enough for the respective protocol (the record protocol
1026 * may use arbitrary fragmentation and even interleaving):
1027 * Change cipher spec protocol
1028 * just 1 byte needed, no need for keeping anything stored
1029 * Alert protocol
1030 * 2 bytes needed (AlertLevel, AlertDescription)
1031 * Handshake protocol
1032 * 4 bytes needed (HandshakeType, uint24 length) -- we just have
1033 * to detect unexpected Client Hello and Hello Request messages
1034 * here, anything else is handled by higher layers
1035 * Application data protocol
1036 * none of our business
1037 */
1038int
1039ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
1040{
1041 int rrcount = 0;
1042 ssize_t ssret;
1043 int ret;
1044
1045 if (s->s3->rbuf.buf == NULL) {
1046 if (!ssl3_setup_read_buffer(s))
1047 return -1;
1048 }
1049
1050 if (s->s3->rcontent == NULL) {
1051 if ((s->s3->rcontent = tls_content_new()) == NULL)
1052 return -1;
1053 }
1054
1055 if (len < 0) {
1056 SSLerror(s, ERR_R_INTERNAL_ERROR);
1057 return -1;
1058 }
1059
1060 if (type != 0 && type != SSL3_RT_APPLICATION_DATA &&
1061 type != SSL3_RT_HANDSHAKE) {
1062 SSLerror(s, ERR_R_INTERNAL_ERROR);
1063 return -1;
1064 }
1065 if (peek && type != SSL3_RT_APPLICATION_DATA) {
1066 SSLerror(s, ERR_R_INTERNAL_ERROR);
1067 return -1;
1068 }
1069
1070 if (type == SSL3_RT_HANDSHAKE &&
1071 s->s3->handshake_fragment != NULL &&
1072 tls_buffer_remaining(s->s3->handshake_fragment) > 0) {
1073 ssize_t ssn;
1074
1075 if ((ssn = tls_buffer_read(s->s3->handshake_fragment, buf,
1076 len)) <= 0)
1077 return -1;
1078
1079 if (tls_buffer_remaining(s->s3->handshake_fragment) == 0) {
1080 tls_buffer_free(s->s3->handshake_fragment);
1081 s->s3->handshake_fragment = NULL;
1082 }
1083
1084 return (int)ssn;
1085 }
1086
1087 if (SSL_in_init(s) && !s->in_handshake) {
1088 if ((ret = s->handshake_func(s)) < 0)
1089 return ret;
1090 if (ret == 0) {
1091 SSLerror(s, SSL_R_SSL_HANDSHAKE_FAILURE);
1092 return -1;
1093 }
1094 }
1095
1096 start:
1097 /*
1098 * Do not process more than three consecutive records, otherwise the
1099 * peer can cause us to loop indefinitely. Instead, return with an
1100 * SSL_ERROR_WANT_READ so the caller can choose when to handle further
1101 * processing. In the future, the total number of non-handshake and
1102 * non-application data records per connection should probably also be
1103 * limited...
1104 */
1105 if (rrcount++ >= 3) {
1106 ssl_force_want_read(s);
1107 return -1;
1108 }
1109
1110 s->rwstate = SSL_NOTHING;
1111
1112 if (tls_content_remaining(s->s3->rcontent) == 0) {
1113 if ((ret = ssl3_get_record(s)) <= 0)
1114 return ret;
1115 }
1116
1117 /* We now have a packet which can be read and processed. */
1118
1119 if (s->s3->change_cipher_spec &&
1120 tls_content_type(s->s3->rcontent) != SSL3_RT_HANDSHAKE) {
1121 SSLerror(s, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
1122 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1123 return -1;
1124 }
1125
1126 /*
1127 * If the other end has shut down, throw anything we read away (even in
1128 * 'peek' mode).
1129 */
1130 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1131 s->rwstate = SSL_NOTHING;
1132 tls_content_clear(s->s3->rcontent);
1133 s->s3->rrec.length = 0;
1134 return 0;
1135 }
1136
1137 /* SSL3_RT_APPLICATION_DATA or SSL3_RT_HANDSHAKE */
1138 if (tls_content_type(s->s3->rcontent) == type) {
1139 /*
1140 * Make sure that we are not getting application data when we
1141 * are doing a handshake for the first time.
1142 */
1143 if (SSL_in_init(s) && type == SSL3_RT_APPLICATION_DATA &&
1144 !tls12_record_layer_read_protected(s->rl)) {
1145 SSLerror(s, SSL_R_APP_DATA_IN_HANDSHAKE);
1146 ssl3_send_alert(s, SSL3_AL_FATAL,
1147 SSL_AD_UNEXPECTED_MESSAGE);
1148 return -1;
1149 }
1150
1151 if (len <= 0)
1152 return len;
1153
1154 if (peek) {
1155 ssret = tls_content_peek(s->s3->rcontent, buf, len);
1156 } else {
1157 ssret = tls_content_read(s->s3->rcontent, buf, len);
1158 }
1159 if (ssret < INT_MIN || ssret > INT_MAX)
1160 return -1;
1161 if (ssret < 0)
1162 return (int)ssret;
1163
1164 if (tls_content_remaining(s->s3->rcontent) == 0) {
1165 s->rstate = SSL_ST_READ_HEADER;
1166
1167 if (s->mode & SSL_MODE_RELEASE_BUFFERS &&
1168 s->s3->rbuf.left == 0)
1169 ssl3_release_read_buffer(s);
1170 }
1171
1172 return ssret;
1173 }
1174
1175 if (tls_content_type(s->s3->rcontent) == SSL3_RT_ALERT) {
1176 if ((ret = ssl3_read_alert(s)) <= 0)
1177 return ret;
1178 goto start;
1179 }
1180
1181 if (s->shutdown & SSL_SENT_SHUTDOWN) {
1182 s->rwstate = SSL_NOTHING;
1183 tls_content_clear(s->s3->rcontent);
1184 s->s3->rrec.length = 0;
1185 return 0;
1186 }
1187
1188 if (tls_content_type(s->s3->rcontent) == SSL3_RT_APPLICATION_DATA) {
1189 /*
1190 * At this point, we were expecting handshake data, but have
1191 * application data. If the library was running inside
1192 * ssl3_read() (i.e. in_read_app_data is set) and it makes
1193 * sense to read application data at this point (session
1194 * renegotiation not yet started), we will indulge it.
1195 */
1196 if (s->s3->in_read_app_data != 0 &&
1197 s->s3->total_renegotiations != 0 &&
1198 (((s->s3->hs.state & SSL_ST_CONNECT) &&
1199 (s->s3->hs.state >= SSL3_ST_CW_CLNT_HELLO_A) &&
1200 (s->s3->hs.state <= SSL3_ST_CR_SRVR_HELLO_A)) || (
1201 (s->s3->hs.state & SSL_ST_ACCEPT) &&
1202 (s->s3->hs.state <= SSL3_ST_SW_HELLO_REQ_A) &&
1203 (s->s3->hs.state >= SSL3_ST_SR_CLNT_HELLO_A)))) {
1204 s->s3->in_read_app_data = 2;
1205 return -1;
1206 } else {
1207 SSLerror(s, SSL_R_UNEXPECTED_RECORD);
1208 ssl3_send_alert(s, SSL3_AL_FATAL,
1209 SSL_AD_UNEXPECTED_MESSAGE);
1210 return -1;
1211 }
1212 }
1213
1214 if (tls_content_type(s->s3->rcontent) == SSL3_RT_CHANGE_CIPHER_SPEC) {
1215 if ((ret = ssl3_read_change_cipher_spec(s)) <= 0)
1216 return ret;
1217 goto start;
1218 }
1219
1220 if (tls_content_type(s->s3->rcontent) == SSL3_RT_HANDSHAKE) {
1221 if ((ret = ssl3_read_handshake_unexpected(s)) <= 0)
1222 return ret;
1223 goto start;
1224 }
1225
1226 /*
1227 * Unknown record type - TLSv1.2 sends an unexpected message alert while
1228 * earlier versions silently ignore the record.
1229 */
1230 if (ssl_effective_tls_version(s) <= TLS1_1_VERSION) {
1231 tls_content_clear(s->s3->rcontent);
1232 goto start;
1233 }
1234 SSLerror(s, SSL_R_UNEXPECTED_RECORD);
1235 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
1236 return -1;
1237}
1238
1239int
1240ssl3_do_change_cipher_spec(SSL *s)
1241{
1242 if (s->s3->hs.tls12.key_block == NULL) {
1243 if (s->session == NULL || s->session->master_key_length == 0) {
1244 /* might happen if dtls1_read_bytes() calls this */
1245 SSLerror(s, SSL_R_CCS_RECEIVED_EARLY);
1246 return (0);
1247 }
1248
1249 s->session->cipher = s->s3->hs.cipher;
1250 if (!tls1_setup_key_block(s))
1251 return (0);
1252 }
1253
1254 if (!tls1_change_read_cipher_state(s))
1255 return (0);
1256
1257 /*
1258 * We have to record the message digest at this point so we can get it
1259 * before we read the finished message.
1260 */
1261 if (!tls12_derive_peer_finished(s))
1262 return (0);
1263
1264 return (1);
1265}
1266
1267static int
1268ssl3_write_alert(SSL *s)
1269{
1270 if (SSL_is_dtls(s))
1271 return do_dtls1_write(s, SSL3_RT_ALERT, s->s3->send_alert,
1272 sizeof(s->s3->send_alert));
1273
1274 return do_ssl3_write(s, SSL3_RT_ALERT, s->s3->send_alert,
1275 sizeof(s->s3->send_alert));
1276}
1277
1278int
1279ssl3_send_alert(SSL *s, int level, int desc)
1280{
1281 /* If alert is fatal, remove session from cache. */
1282 if (level == SSL3_AL_FATAL)
1283 SSL_CTX_remove_session(s->ctx, s->session);
1284
1285 s->s3->alert_dispatch = 1;
1286 s->s3->send_alert[0] = level;
1287 s->s3->send_alert[1] = desc;
1288
1289 /*
1290 * If data is still being written out, the alert will be dispatched at
1291 * some point in the future.
1292 */
1293 if (s->s3->wbuf.left != 0)
1294 return -1;
1295
1296 return ssl3_dispatch_alert(s);
1297}
1298
1299int
1300ssl3_dispatch_alert(SSL *s)
1301{
1302 int ret;
1303
1304 s->s3->alert_dispatch = 0;
1305 if ((ret = ssl3_write_alert(s)) <= 0) {
1306 s->s3->alert_dispatch = 1;
1307 return ret;
1308 }
1309
1310 /*
1311 * Alert sent to BIO. If it is important, flush it now.
1312 * If the message does not get sent due to non-blocking IO,
1313 * we will not worry too much.
1314 */
1315 if (s->s3->send_alert[0] == SSL3_AL_FATAL)
1316 (void)BIO_flush(s->wbio);
1317
1318 ssl_msg_callback(s, 1, SSL3_RT_ALERT, s->s3->send_alert, 2);
1319
1320 ssl_info_callback(s, SSL_CB_WRITE_ALERT,
1321 (s->s3->send_alert[0] << 8) | s->s3->send_alert[1]);
1322
1323 return ret;
1324}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-11 20:18:36 +0000