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Diffstat (limited to 'src/lib/libssl/tls13_handshake.c')
-rw-r--r--src/lib/libssl/tls13_handshake.c697
1 files changed, 0 insertions, 697 deletions
diff --git a/src/lib/libssl/tls13_handshake.c b/src/lib/libssl/tls13_handshake.c
deleted file mode 100644
index 310a2116b8..0000000000
--- a/src/lib/libssl/tls13_handshake.c
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@@ -1,697 +0,0 @@
1/* $OpenBSD: tls13_handshake.c,v 1.69 2021/07/01 17:53:39 jsing Exp $ */
2/*
3 * Copyright (c) 2018-2021 Theo Buehler <tb@openbsd.org>
4 * Copyright (c) 2019 Joel Sing <jsing@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <stddef.h>
20
21#include "ssl_locl.h"
22#include "tls13_handshake.h"
23#include "tls13_internal.h"
24
25/* Based on RFC 8446 and inspired by s2n's TLS 1.2 state machine. */
26
27struct tls13_handshake_action {
28 uint8_t handshake_type;
29 uint8_t sender;
30 uint8_t handshake_complete;
31 uint8_t send_preserve_transcript_hash;
32 uint8_t recv_preserve_transcript_hash;
33
34 int (*send)(struct tls13_ctx *ctx, CBB *cbb);
35 int (*sent)(struct tls13_ctx *ctx);
36 int (*recv)(struct tls13_ctx *ctx, CBS *cbs);
37};
38
39static enum tls13_message_type
40 tls13_handshake_active_state(struct tls13_ctx *ctx);
41
42static const struct tls13_handshake_action *
43 tls13_handshake_active_action(struct tls13_ctx *ctx);
44static int tls13_handshake_advance_state_machine(struct tls13_ctx *ctx);
45
46static int tls13_handshake_send_action(struct tls13_ctx *ctx,
47 const struct tls13_handshake_action *action);
48static int tls13_handshake_recv_action(struct tls13_ctx *ctx,
49 const struct tls13_handshake_action *action);
50
51static int tls13_handshake_set_legacy_state(struct tls13_ctx *ctx);
52static int tls13_handshake_legacy_info_callback(struct tls13_ctx *ctx);
53
54static const struct tls13_handshake_action state_machine[] = {
55 [CLIENT_HELLO] = {
56 .handshake_type = TLS13_MT_CLIENT_HELLO,
57 .sender = TLS13_HS_CLIENT,
58 .send = tls13_client_hello_send,
59 .sent = tls13_client_hello_sent,
60 .recv = tls13_client_hello_recv,
61 },
62 [CLIENT_HELLO_RETRY] = {
63 .handshake_type = TLS13_MT_CLIENT_HELLO,
64 .sender = TLS13_HS_CLIENT,
65 .send = tls13_client_hello_retry_send,
66 .recv = tls13_client_hello_retry_recv,
67 },
68 [CLIENT_END_OF_EARLY_DATA] = {
69 .handshake_type = TLS13_MT_END_OF_EARLY_DATA,
70 .sender = TLS13_HS_CLIENT,
71 .send = tls13_client_end_of_early_data_send,
72 .recv = tls13_client_end_of_early_data_recv,
73 },
74 [CLIENT_CERTIFICATE] = {
75 .handshake_type = TLS13_MT_CERTIFICATE,
76 .sender = TLS13_HS_CLIENT,
77 .send_preserve_transcript_hash = 1,
78 .send = tls13_client_certificate_send,
79 .recv = tls13_client_certificate_recv,
80 },
81 [CLIENT_CERTIFICATE_VERIFY] = {
82 .handshake_type = TLS13_MT_CERTIFICATE_VERIFY,
83 .sender = TLS13_HS_CLIENT,
84 .recv_preserve_transcript_hash = 1,
85 .send = tls13_client_certificate_verify_send,
86 .recv = tls13_client_certificate_verify_recv,
87 },
88 [CLIENT_FINISHED] = {
89 .handshake_type = TLS13_MT_FINISHED,
90 .sender = TLS13_HS_CLIENT,
91 .recv_preserve_transcript_hash = 1,
92 .send = tls13_client_finished_send,
93 .sent = tls13_client_finished_sent,
94 .recv = tls13_client_finished_recv,
95 },
96 [SERVER_HELLO] = {
97 .handshake_type = TLS13_MT_SERVER_HELLO,
98 .sender = TLS13_HS_SERVER,
99 .send = tls13_server_hello_send,
100 .sent = tls13_server_hello_sent,
101 .recv = tls13_server_hello_recv,
102 },
103 [SERVER_HELLO_RETRY_REQUEST] = {
104 .handshake_type = TLS13_MT_SERVER_HELLO,
105 .sender = TLS13_HS_SERVER,
106 .send = tls13_server_hello_retry_request_send,
107 .recv = tls13_server_hello_retry_request_recv,
108 .sent = tls13_server_hello_retry_request_sent,
109 },
110 [SERVER_ENCRYPTED_EXTENSIONS] = {
111 .handshake_type = TLS13_MT_ENCRYPTED_EXTENSIONS,
112 .sender = TLS13_HS_SERVER,
113 .send = tls13_server_encrypted_extensions_send,
114 .recv = tls13_server_encrypted_extensions_recv,
115 },
116 [SERVER_CERTIFICATE] = {
117 .handshake_type = TLS13_MT_CERTIFICATE,
118 .sender = TLS13_HS_SERVER,
119 .send_preserve_transcript_hash = 1,
120 .send = tls13_server_certificate_send,
121 .recv = tls13_server_certificate_recv,
122 },
123 [SERVER_CERTIFICATE_REQUEST] = {
124 .handshake_type = TLS13_MT_CERTIFICATE_REQUEST,
125 .sender = TLS13_HS_SERVER,
126 .send = tls13_server_certificate_request_send,
127 .recv = tls13_server_certificate_request_recv,
128 },
129 [SERVER_CERTIFICATE_VERIFY] = {
130 .handshake_type = TLS13_MT_CERTIFICATE_VERIFY,
131 .sender = TLS13_HS_SERVER,
132 .recv_preserve_transcript_hash = 1,
133 .send = tls13_server_certificate_verify_send,
134 .recv = tls13_server_certificate_verify_recv,
135 },
136 [SERVER_FINISHED] = {
137 .handshake_type = TLS13_MT_FINISHED,
138 .sender = TLS13_HS_SERVER,
139 .recv_preserve_transcript_hash = 1,
140 .send_preserve_transcript_hash = 1,
141 .send = tls13_server_finished_send,
142 .sent = tls13_server_finished_sent,
143 .recv = tls13_server_finished_recv,
144 },
145 [APPLICATION_DATA] = {
146 .handshake_complete = 1,
147 },
148};
149
150const enum tls13_message_type handshakes[][TLS13_NUM_MESSAGE_TYPES] = {
151 [INITIAL] = {
152 CLIENT_HELLO,
153 SERVER_HELLO_RETRY_REQUEST,
154 CLIENT_HELLO_RETRY,
155 SERVER_HELLO,
156 },
157 [NEGOTIATED] = {
158 CLIENT_HELLO,
159 SERVER_HELLO_RETRY_REQUEST,
160 CLIENT_HELLO_RETRY,
161 SERVER_HELLO,
162 SERVER_ENCRYPTED_EXTENSIONS,
163 SERVER_CERTIFICATE_REQUEST,
164 SERVER_CERTIFICATE,
165 SERVER_CERTIFICATE_VERIFY,
166 SERVER_FINISHED,
167 CLIENT_CERTIFICATE,
168 CLIENT_FINISHED,
169 APPLICATION_DATA,
170 },
171 [NEGOTIATED | WITHOUT_HRR] = {
172 CLIENT_HELLO,
173 SERVER_HELLO,
174 SERVER_ENCRYPTED_EXTENSIONS,
175 SERVER_CERTIFICATE_REQUEST,
176 SERVER_CERTIFICATE,
177 SERVER_CERTIFICATE_VERIFY,
178 SERVER_FINISHED,
179 CLIENT_CERTIFICATE,
180 CLIENT_FINISHED,
181 APPLICATION_DATA,
182 },
183 [NEGOTIATED | WITHOUT_CR] = {
184 CLIENT_HELLO,
185 SERVER_HELLO_RETRY_REQUEST,
186 CLIENT_HELLO_RETRY,
187 SERVER_HELLO,
188 SERVER_ENCRYPTED_EXTENSIONS,
189 SERVER_CERTIFICATE,
190 SERVER_CERTIFICATE_VERIFY,
191 SERVER_FINISHED,
192 CLIENT_FINISHED,
193 APPLICATION_DATA,
194 },
195 [NEGOTIATED | WITHOUT_HRR | WITHOUT_CR] = {
196 CLIENT_HELLO,
197 SERVER_HELLO,
198 SERVER_ENCRYPTED_EXTENSIONS,
199 SERVER_CERTIFICATE,
200 SERVER_CERTIFICATE_VERIFY,
201 SERVER_FINISHED,
202 CLIENT_FINISHED,
203 APPLICATION_DATA,
204 },
205 [NEGOTIATED | WITH_PSK] = {
206 CLIENT_HELLO,
207 SERVER_HELLO_RETRY_REQUEST,
208 CLIENT_HELLO_RETRY,
209 SERVER_HELLO,
210 SERVER_ENCRYPTED_EXTENSIONS,
211 SERVER_FINISHED,
212 CLIENT_FINISHED,
213 APPLICATION_DATA,
214 },
215 [NEGOTIATED | WITHOUT_HRR | WITH_PSK] = {
216 CLIENT_HELLO,
217 SERVER_HELLO,
218 SERVER_ENCRYPTED_EXTENSIONS,
219 SERVER_FINISHED,
220 CLIENT_FINISHED,
221 APPLICATION_DATA,
222 },
223 [NEGOTIATED | WITH_CCV] = {
224 CLIENT_HELLO,
225 SERVER_HELLO_RETRY_REQUEST,
226 CLIENT_HELLO_RETRY,
227 SERVER_HELLO,
228 SERVER_ENCRYPTED_EXTENSIONS,
229 SERVER_CERTIFICATE_REQUEST,
230 SERVER_CERTIFICATE,
231 SERVER_CERTIFICATE_VERIFY,
232 SERVER_FINISHED,
233 CLIENT_CERTIFICATE,
234 CLIENT_CERTIFICATE_VERIFY,
235 CLIENT_FINISHED,
236 APPLICATION_DATA,
237 },
238 [NEGOTIATED | WITHOUT_HRR | WITH_CCV] = {
239 CLIENT_HELLO,
240 SERVER_HELLO,
241 SERVER_ENCRYPTED_EXTENSIONS,
242 SERVER_CERTIFICATE_REQUEST,
243 SERVER_CERTIFICATE,
244 SERVER_CERTIFICATE_VERIFY,
245 SERVER_FINISHED,
246 CLIENT_CERTIFICATE,
247 CLIENT_CERTIFICATE_VERIFY,
248 CLIENT_FINISHED,
249 APPLICATION_DATA,
250 },
251};
252
253const size_t handshake_count = sizeof(handshakes) / sizeof(handshakes[0]);
254
255#ifndef TLS13_DEBUG
256#define DEBUGF(...)
257#else
258#define DEBUGF(...) fprintf(stderr, __VA_ARGS__)
259
260static const char *
261tls13_handshake_mode_name(uint8_t mode)
262{
263 switch (mode) {
264 case TLS13_HS_CLIENT:
265 return "Client";
266 case TLS13_HS_SERVER:
267 return "Server";
268 }
269 return "Unknown";
270}
271
272static const char *
273tls13_handshake_message_name(uint8_t msg_type)
274{
275 switch (msg_type) {
276 case TLS13_MT_CLIENT_HELLO:
277 return "ClientHello";
278 case TLS13_MT_SERVER_HELLO:
279 return "ServerHello";
280 case TLS13_MT_NEW_SESSION_TICKET:
281 return "NewSessionTicket";
282 case TLS13_MT_END_OF_EARLY_DATA:
283 return "EndOfEarlyData";
284 case TLS13_MT_ENCRYPTED_EXTENSIONS:
285 return "EncryptedExtensions";
286 case TLS13_MT_CERTIFICATE:
287 return "Certificate";
288 case TLS13_MT_CERTIFICATE_REQUEST:
289 return "CertificateRequest";
290 case TLS13_MT_CERTIFICATE_VERIFY:
291 return "CertificateVerify";
292 case TLS13_MT_FINISHED:
293 return "Finished";
294 case TLS13_MT_KEY_UPDATE:
295 return "KeyUpdate";
296 }
297 return "Unknown";
298}
299#endif
300
301static enum tls13_message_type
302tls13_handshake_active_state(struct tls13_ctx *ctx)
303{
304 struct tls13_handshake_stage hs = ctx->handshake_stage;
305
306 if (hs.hs_type >= handshake_count)
307 return INVALID;
308 if (hs.message_number >= TLS13_NUM_MESSAGE_TYPES)
309 return INVALID;
310
311 return handshakes[hs.hs_type][hs.message_number];
312}
313
314static const struct tls13_handshake_action *
315tls13_handshake_active_action(struct tls13_ctx *ctx)
316{
317 enum tls13_message_type mt = tls13_handshake_active_state(ctx);
318
319 if (mt == INVALID)
320 return NULL;
321
322 return &state_machine[mt];
323}
324
325static int
326tls13_handshake_advance_state_machine(struct tls13_ctx *ctx)
327{
328 if (++ctx->handshake_stage.message_number >= TLS13_NUM_MESSAGE_TYPES)
329 return 0;
330
331 return 1;
332}
333
334int
335tls13_handshake_msg_record(struct tls13_ctx *ctx)
336{
337 CBS cbs;
338
339 tls13_handshake_msg_data(ctx->hs_msg, &cbs);
340 return tls1_transcript_record(ctx->ssl, CBS_data(&cbs), CBS_len(&cbs));
341}
342
343int
344tls13_handshake_perform(struct tls13_ctx *ctx)
345{
346 const struct tls13_handshake_action *action;
347 int ret;
348
349 if (!ctx->handshake_started) {
350 /*
351 * Set legacy state to connect/accept and call info callback
352 * to signal that the handshake started.
353 */
354 if (!tls13_handshake_set_legacy_state(ctx))
355 return TLS13_IO_FAILURE;
356 if (!tls13_handshake_legacy_info_callback(ctx))
357 return TLS13_IO_FAILURE;
358
359 ctx->handshake_started = 1;
360
361 /* Set legacy state for initial ClientHello read or write. */
362 if (!tls13_handshake_set_legacy_state(ctx))
363 return TLS13_IO_FAILURE;
364 }
365
366 for (;;) {
367 if ((action = tls13_handshake_active_action(ctx)) == NULL)
368 return TLS13_IO_FAILURE;
369
370 if (action->handshake_complete) {
371 ctx->handshake_completed = 1;
372 tls13_record_layer_handshake_completed(ctx->rl);
373
374 if (!tls13_handshake_set_legacy_state(ctx))
375 return TLS13_IO_FAILURE;
376 if (!tls13_handshake_legacy_info_callback(ctx))
377 return TLS13_IO_FAILURE;
378
379 return TLS13_IO_SUCCESS;
380 }
381
382 DEBUGF("%s %s %s\n", tls13_handshake_mode_name(ctx->mode),
383 (action->sender == ctx->mode) ? "sending" : "receiving",
384 tls13_handshake_message_name(action->handshake_type));
385
386 if (ctx->alert != 0)
387 return tls13_send_alert(ctx->rl, ctx->alert);
388
389 if (action->sender == ctx->mode)
390 ret = tls13_handshake_send_action(ctx, action);
391 else
392 ret = tls13_handshake_recv_action(ctx, action);
393
394 if (ctx->alert != 0)
395 return tls13_send_alert(ctx->rl, ctx->alert);
396
397 if (ret <= 0) {
398 DEBUGF("%s %s returned %d\n",
399 tls13_handshake_mode_name(ctx->mode),
400 (action->sender == ctx->mode) ? "send" : "recv",
401 ret);
402 return ret;
403 }
404
405 if (!tls13_handshake_legacy_info_callback(ctx))
406 return TLS13_IO_FAILURE;
407
408 if (!tls13_handshake_advance_state_machine(ctx))
409 return TLS13_IO_FAILURE;
410
411 if (!tls13_handshake_set_legacy_state(ctx))
412 return TLS13_IO_FAILURE;
413 }
414}
415
416static int
417tls13_handshake_send_action(struct tls13_ctx *ctx,
418 const struct tls13_handshake_action *action)
419{
420 ssize_t ret;
421 CBB cbb;
422
423 if (ctx->send_dummy_ccs) {
424 if ((ret = tls13_send_dummy_ccs(ctx->rl)) != TLS13_IO_SUCCESS)
425 return ret;
426 ctx->send_dummy_ccs = 0;
427 if (ctx->send_dummy_ccs_after) {
428 ctx->send_dummy_ccs_after = 0;
429 return TLS13_IO_SUCCESS;
430 }
431 }
432
433 /* If we have no handshake message, we need to build one. */
434 if (ctx->hs_msg == NULL) {
435 if ((ctx->hs_msg = tls13_handshake_msg_new()) == NULL)
436 return TLS13_IO_FAILURE;
437 if (!tls13_handshake_msg_start(ctx->hs_msg, &cbb,
438 action->handshake_type))
439 return TLS13_IO_FAILURE;
440 if (!action->send(ctx, &cbb))
441 return TLS13_IO_FAILURE;
442 if (!tls13_handshake_msg_finish(ctx->hs_msg))
443 return TLS13_IO_FAILURE;
444 }
445
446 if ((ret = tls13_handshake_msg_send(ctx->hs_msg, ctx->rl)) <= 0)
447 return ret;
448
449 if (!tls13_handshake_msg_record(ctx))
450 return TLS13_IO_FAILURE;
451
452 if (action->send_preserve_transcript_hash) {
453 if (!tls1_transcript_hash_value(ctx->ssl,
454 ctx->hs->tls13.transcript_hash,
455 sizeof(ctx->hs->tls13.transcript_hash),
456 &ctx->hs->tls13.transcript_hash_len))
457 return TLS13_IO_FAILURE;
458 }
459
460 if (ctx->handshake_message_sent_cb != NULL)
461 ctx->handshake_message_sent_cb(ctx);
462
463 tls13_handshake_msg_free(ctx->hs_msg);
464 ctx->hs_msg = NULL;
465
466 if (action->sent != NULL && !action->sent(ctx))
467 return TLS13_IO_FAILURE;
468
469 if (ctx->send_dummy_ccs_after) {
470 ctx->send_dummy_ccs = 1;
471 if ((ret = tls13_send_dummy_ccs(ctx->rl)) != TLS13_IO_SUCCESS)
472 return ret;
473 ctx->send_dummy_ccs = 0;
474 ctx->send_dummy_ccs_after = 0;
475 }
476
477 return TLS13_IO_SUCCESS;
478}
479
480static int
481tls13_handshake_recv_action(struct tls13_ctx *ctx,
482 const struct tls13_handshake_action *action)
483{
484 uint8_t msg_type;
485 ssize_t ret;
486 CBS cbs;
487
488 if (ctx->hs_msg == NULL) {
489 if ((ctx->hs_msg = tls13_handshake_msg_new()) == NULL)
490 return TLS13_IO_FAILURE;
491 }
492
493 if ((ret = tls13_handshake_msg_recv(ctx->hs_msg, ctx->rl)) <= 0)
494 return ret;
495
496 if (action->recv_preserve_transcript_hash) {
497 if (!tls1_transcript_hash_value(ctx->ssl,
498 ctx->hs->tls13.transcript_hash,
499 sizeof(ctx->hs->tls13.transcript_hash),
500 &ctx->hs->tls13.transcript_hash_len))
501 return TLS13_IO_FAILURE;
502 }
503
504 if (!tls13_handshake_msg_record(ctx))
505 return TLS13_IO_FAILURE;
506
507 if (ctx->handshake_message_recv_cb != NULL)
508 ctx->handshake_message_recv_cb(ctx);
509
510 /*
511 * In TLSv1.3 there is no way to know if you're going to receive a
512 * certificate request message or not, hence we have to special case it
513 * here. The receive handler also knows how to deal with this situation.
514 */
515 msg_type = tls13_handshake_msg_type(ctx->hs_msg);
516 if (msg_type != action->handshake_type &&
517 (msg_type != TLS13_MT_CERTIFICATE ||
518 action->handshake_type != TLS13_MT_CERTIFICATE_REQUEST))
519 return tls13_send_alert(ctx->rl, TLS13_ALERT_UNEXPECTED_MESSAGE);
520
521 if (!tls13_handshake_msg_content(ctx->hs_msg, &cbs))
522 return TLS13_IO_FAILURE;
523
524 ret = TLS13_IO_FAILURE;
525 if (action->recv(ctx, &cbs)) {
526 if (CBS_len(&cbs) != 0) {
527 tls13_set_errorx(ctx, TLS13_ERR_TRAILING_DATA, 0,
528 "trailing data in handshake message", NULL);
529 ctx->alert = TLS13_ALERT_DECODE_ERROR;
530 } else {
531 ret = TLS13_IO_SUCCESS;
532 }
533 }
534
535 tls13_handshake_msg_free(ctx->hs_msg);
536 ctx->hs_msg = NULL;
537
538 if (ctx->ssl->method->version < TLS1_3_VERSION)
539 return TLS13_IO_USE_LEGACY;
540
541 return ret;
542}
543
544struct tls13_handshake_legacy_state {
545 int recv;
546 int send;
547};
548
549static const struct tls13_handshake_legacy_state legacy_states[] = {
550 [CLIENT_HELLO] = {
551 .recv = SSL3_ST_SR_CLNT_HELLO_A,
552 .send = SSL3_ST_CW_CLNT_HELLO_A,
553 },
554 [SERVER_HELLO_RETRY_REQUEST] = {
555 .recv = SSL3_ST_CR_SRVR_HELLO_A,
556 .send = SSL3_ST_SW_SRVR_HELLO_A,
557 },
558 [CLIENT_HELLO_RETRY] = {
559 .recv = SSL3_ST_SR_CLNT_HELLO_A,
560 .send = SSL3_ST_CW_CLNT_HELLO_A,
561 },
562 [SERVER_HELLO] = {
563 .recv = SSL3_ST_CR_SRVR_HELLO_A,
564 .send = SSL3_ST_SW_SRVR_HELLO_A,
565 },
566 [SERVER_ENCRYPTED_EXTENSIONS] = {
567 .send = 0,
568 .recv = 0,
569 },
570 [SERVER_CERTIFICATE_REQUEST] = {
571 .recv = SSL3_ST_CR_CERT_REQ_A,
572 .send = SSL3_ST_SW_CERT_REQ_A,
573 },
574 [SERVER_CERTIFICATE] = {
575 .recv = SSL3_ST_CR_CERT_A,
576 .send = SSL3_ST_SW_CERT_A,
577 },
578 [SERVER_CERTIFICATE_VERIFY] = {
579 .send = 0,
580 .recv = 0,
581 },
582 [SERVER_FINISHED] = {
583 .recv = SSL3_ST_CR_FINISHED_A,
584 .send = SSL3_ST_SW_FINISHED_A,
585 },
586 [CLIENT_END_OF_EARLY_DATA] = {
587 .send = 0,
588 .recv = 0,
589 },
590 [CLIENT_CERTIFICATE] = {
591 .recv = SSL3_ST_SR_CERT_VRFY_A,
592 .send = SSL3_ST_CW_CERT_VRFY_B,
593 },
594 [CLIENT_CERTIFICATE_VERIFY] = {
595 .send = 0,
596 .recv = 0,
597 },
598 [CLIENT_FINISHED] = {
599 .recv = SSL3_ST_SR_FINISHED_A,
600 .send = SSL3_ST_CW_FINISHED_A,
601 },
602 [APPLICATION_DATA] = {
603 .recv = 0,
604 .send = 0,
605 },
606};
607
608CTASSERT(sizeof(state_machine) / sizeof(state_machine[0]) ==
609 sizeof(legacy_states) / sizeof(legacy_states[0]));
610
611static int
612tls13_handshake_legacy_state(struct tls13_ctx *ctx, int *out_state)
613{
614 const struct tls13_handshake_action *action;
615 enum tls13_message_type mt;
616
617 *out_state = 0;
618
619 if (!ctx->handshake_started) {
620 if (ctx->mode == TLS13_HS_CLIENT)
621 *out_state = SSL_ST_CONNECT;
622 else
623 *out_state = SSL_ST_ACCEPT;
624
625 return 1;
626 }
627
628 if (ctx->handshake_completed) {
629 *out_state = SSL_ST_OK;
630 return 1;
631 }
632
633 if ((mt = tls13_handshake_active_state(ctx)) == INVALID)
634 return 0;
635
636 if ((action = tls13_handshake_active_action(ctx)) == NULL)
637 return 0;
638
639 if (action->sender == ctx->mode)
640 *out_state = legacy_states[mt].send;
641 else
642 *out_state = legacy_states[mt].recv;
643
644 return 1;
645}
646
647static int
648tls13_handshake_info_position(struct tls13_ctx *ctx)
649{
650 if (!ctx->handshake_started)
651 return TLS13_INFO_HANDSHAKE_STARTED;
652
653 if (ctx->handshake_completed)
654 return TLS13_INFO_HANDSHAKE_COMPLETED;
655
656 if (ctx->mode == TLS13_HS_CLIENT)
657 return TLS13_INFO_CONNECT_LOOP;
658 else
659 return TLS13_INFO_ACCEPT_LOOP;
660}
661
662static int
663tls13_handshake_legacy_info_callback(struct tls13_ctx *ctx)
664{
665 int state, where;
666
667 if (!tls13_handshake_legacy_state(ctx, &state))
668 return 0;
669
670 /* Do nothing if there's no corresponding legacy state. */
671 if (state == 0)
672 return 1;
673
674 if (ctx->info_cb != NULL) {
675 where = tls13_handshake_info_position(ctx);
676 ctx->info_cb(ctx, where, 1);
677 }
678
679 return 1;
680}
681
682static int
683tls13_handshake_set_legacy_state(struct tls13_ctx *ctx)
684{
685 int state;
686
687 if (!tls13_handshake_legacy_state(ctx, &state))
688 return 0;
689
690 /* Do nothing if there's no corresponding legacy state. */
691 if (state == 0)
692 return 1;
693
694 ctx->hs->state = state;
695
696 return 1;
697}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-12 15:43:52 +0000