1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
56 */
57/* ====================================================================
58 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
59 *
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
62 * are met:
63 *
64 * 1. Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
66 *
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
76 *
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
81 *
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
85 *
86 * 6. Redistributions of any form whatsoever must retain the following
87 * acknowledgment:
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
90 *
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
104 *
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com). */
108/* ====================================================================
109 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
110 * ECC cipher suite support in OpenSSL originally developed by
111 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */
112
113#include <openssl/ssl.h>
114
115#include <assert.h>
116
117#include <utility>
118
119#include <openssl/rand.h>
120
121#include "../crypto/internal.h"
122#include "internal.h"
123
124
125BSSL_NAMESPACE_BEGIN
126
127SSL_HANDSHAKE::SSL_HANDSHAKE(SSL *ssl_arg)
128 : ssl(ssl_arg),
129 scts_requested(false),
130 needs_psk_binder(false),
131 received_hello_retry_request(false),
132 sent_hello_retry_request(false),
133 handshake_finalized(false),
134 accept_psk_mode(false),
135 cert_request(false),
136 certificate_status_expected(false),
137 ocsp_stapling_requested(false),
138 delegated_credential_requested(false),
139 should_ack_sni(false),
140 in_false_start(false),
141 in_early_data(false),
142 early_data_offered(false),
143 can_early_read(false),
144 can_early_write(false),
145 next_proto_neg_seen(false),
146 ticket_expected(false),
147 extended_master_secret(false),
148 pending_private_key_op(false),
149 grease_seeded(false),
150 handback(false),
151 cert_compression_negotiated(false),
152 apply_jdk11_workaround(false) {
153 assert(ssl);
154}
155
156SSL_HANDSHAKE::~SSL_HANDSHAKE() {
157 ssl->ctx->x509_method->hs_flush_cached_ca_names(this);
158}
159
160UniquePtr<SSL_HANDSHAKE> ssl_handshake_new(SSL *ssl) {
161 UniquePtr<SSL_HANDSHAKE> hs = MakeUnique<SSL_HANDSHAKE>(ssl);
162 if (!hs || !hs->transcript.Init()) {
163 return nullptr;
164 }
165 hs->config = ssl->config.get();
166 if (!hs->config) {
167 assert(hs->config);
168 return nullptr;
169 }
170 return hs;
171}
172
173bool ssl_check_message_type(SSL *ssl, const SSLMessage &msg, int type) {
174 if (msg.type != type) {
175 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE);
176 OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_MESSAGE);
177 ERR_add_error_dataf("got type %d, wanted type %d", msg.type, type);
178 return false;
179 }
180
181 return true;
182}
183
184bool ssl_add_message_cbb(SSL *ssl, CBB *cbb) {
185 Array<uint8_t> msg;
186 if (!ssl->method->finish_message(ssl, cbb, &msg) ||
187 !ssl->method->add_message(ssl, std::move(msg))) {
188 return false;
189 }
190
191 return true;
192}
193
194size_t ssl_max_handshake_message_len(const SSL *ssl) {
195 // kMaxMessageLen is the default maximum message size for handshakes which do
196 // not accept peer certificate chains.
197 static const size_t kMaxMessageLen = 16384;
198
199 if (SSL_in_init(ssl)) {
200 SSL_CONFIG *config = ssl->config.get(); // SSL_in_init() implies not NULL.
201 if ((!ssl->server || (config->verify_mode & SSL_VERIFY_PEER)) &&
202 kMaxMessageLen < ssl->max_cert_list) {
203 return ssl->max_cert_list;
204 }
205 return kMaxMessageLen;
206 }
207
208 if (ssl_protocol_version(ssl) < TLS1_3_VERSION) {
209 // In TLS 1.2 and below, the largest acceptable post-handshake message is
210 // a HelloRequest.
211 return 0;
212 }
213
214 if (ssl->server) {
215 // The largest acceptable post-handshake message for a server is a
216 // KeyUpdate. We will never initiate post-handshake auth.
217 return 1;
218 }
219
220 // Clients must accept NewSessionTicket, so allow the default size.
221 return kMaxMessageLen;
222}
223
224bool ssl_hash_message(SSL_HANDSHAKE *hs, const SSLMessage &msg) {
225 // V2ClientHello messages are pre-hashed.
226 if (msg.is_v2_hello) {
227 return true;
228 }
229
230 return hs->transcript.Update(msg.raw);
231}
232
233int ssl_parse_extensions(const CBS *cbs, uint8_t *out_alert,
234 const SSL_EXTENSION_TYPE *ext_types,
235 size_t num_ext_types, int ignore_unknown) {
236 // Reset everything.
237 for (size_t i = 0; i < num_ext_types; i++) {
238 *ext_types[i].out_present = 0;
239 CBS_init(ext_types[i].out_data, NULL, 0);
240 }
241
242 CBS copy = *cbs;
243 while (CBS_len(&copy) != 0) {
244 uint16_t type;
245 CBS data;
246 if (!CBS_get_u16(&copy, &type) ||
247 !CBS_get_u16_length_prefixed(&copy, &data)) {
248 OPENSSL_PUT_ERROR(SSL, SSL_R_PARSE_TLSEXT);
249 *out_alert = SSL_AD_DECODE_ERROR;
250 return 0;
251 }
252
253 const SSL_EXTENSION_TYPE *ext_type = NULL;
254 for (size_t i = 0; i < num_ext_types; i++) {
255 if (type == ext_types[i].type) {
256 ext_type = &ext_types[i];
257 break;
258 }
259 }
260
261 if (ext_type == NULL) {
262 if (ignore_unknown) {
263 continue;
264 }
265 OPENSSL_PUT_ERROR(SSL, SSL_R_UNEXPECTED_EXTENSION);
266 *out_alert = SSL_AD_UNSUPPORTED_EXTENSION;
267 return 0;
268 }
269
270 // Duplicate ext_types are forbidden.
271 if (*ext_type->out_present) {
272 OPENSSL_PUT_ERROR(SSL, SSL_R_DUPLICATE_EXTENSION);
273 *out_alert = SSL_AD_ILLEGAL_PARAMETER;
274 return 0;
275 }
276
277 *ext_type->out_present = 1;
278 *ext_type->out_data = data;
279 }
280
281 return 1;
282}
283
284enum ssl_verify_result_t ssl_verify_peer_cert(SSL_HANDSHAKE *hs) {
285 SSL *const ssl = hs->ssl;
286 const SSL_SESSION *prev_session = ssl->s3->established_session.get();
287 if (prev_session != NULL) {
288 // If renegotiating, the server must not change the server certificate. See
289 // https://mitls.org/pages/attacks/3SHAKE. We never resume on renegotiation,
290 // so this check is sufficient to ensure the reported peer certificate never
291 // changes on renegotiation.
292 assert(!ssl->server);
293 if (sk_CRYPTO_BUFFER_num(prev_session->certs.get()) !=
294 sk_CRYPTO_BUFFER_num(hs->new_session->certs.get())) {
295 OPENSSL_PUT_ERROR(SSL, SSL_R_SERVER_CERT_CHANGED);
296 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
297 return ssl_verify_invalid;
298 }
299
300 for (size_t i = 0; i < sk_CRYPTO_BUFFER_num(hs->new_session->certs.get());
301 i++) {
302 const CRYPTO_BUFFER *old_cert =
303 sk_CRYPTO_BUFFER_value(prev_session->certs.get(), i);
304 const CRYPTO_BUFFER *new_cert =
305 sk_CRYPTO_BUFFER_value(hs->new_session->certs.get(), i);
306 if (CRYPTO_BUFFER_len(old_cert) != CRYPTO_BUFFER_len(new_cert) ||
307 OPENSSL_memcmp(CRYPTO_BUFFER_data(old_cert),
308 CRYPTO_BUFFER_data(new_cert),
309 CRYPTO_BUFFER_len(old_cert)) != 0) {
310 OPENSSL_PUT_ERROR(SSL, SSL_R_SERVER_CERT_CHANGED);
311 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER);
312 return ssl_verify_invalid;
313 }
314 }
315
316 // The certificate is identical, so we may skip re-verifying the
317 // certificate. Since we only authenticated the previous one, copy other
318 // authentication from the established session and ignore what was newly
319 // received.
320 hs->new_session->ocsp_response = UpRef(prev_session->ocsp_response);
321 hs->new_session->signed_cert_timestamp_list =
322 UpRef(prev_session->signed_cert_timestamp_list);
323 hs->new_session->verify_result = prev_session->verify_result;
324 return ssl_verify_ok;
325 }
326
327 uint8_t alert = SSL_AD_CERTIFICATE_UNKNOWN;
328 enum ssl_verify_result_t ret;
329 if (hs->config->custom_verify_callback != nullptr) {
330 ret = hs->config->custom_verify_callback(ssl, &alert);
331 switch (ret) {
332 case ssl_verify_ok:
333 hs->new_session->verify_result = X509_V_OK;
334 break;
335 case ssl_verify_invalid:
336 // If |SSL_VERIFY_NONE|, the error is non-fatal, but we keep the result.
337 if (hs->config->verify_mode == SSL_VERIFY_NONE) {
338 ERR_clear_error();
339 ret = ssl_verify_ok;
340 }
341 hs->new_session->verify_result = X509_V_ERR_APPLICATION_VERIFICATION;
342 break;
343 case ssl_verify_retry:
344 break;
345 }
346 } else {
347 ret = ssl->ctx->x509_method->session_verify_cert_chain(
348 hs->new_session.get(), hs, &alert)
349 ? ssl_verify_ok
350 : ssl_verify_invalid;
351 }
352
353 if (ret == ssl_verify_invalid) {
354 OPENSSL_PUT_ERROR(SSL, SSL_R_CERTIFICATE_VERIFY_FAILED);
355 ssl_send_alert(ssl, SSL3_AL_FATAL, alert);
356 }
357
358 // Emulate OpenSSL's client OCSP callback. OpenSSL verifies certificates
359 // before it receives the OCSP, so it needs a second callback for OCSP.
360 if (ret == ssl_verify_ok && !ssl->server &&
361 hs->config->ocsp_stapling_enabled &&
362 ssl->ctx->legacy_ocsp_callback != nullptr) {
363 int cb_ret =
364 ssl->ctx->legacy_ocsp_callback(ssl, ssl->ctx->legacy_ocsp_callback_arg);
365 if (cb_ret <= 0) {
366 OPENSSL_PUT_ERROR(SSL, SSL_R_OCSP_CB_ERROR);
367 ssl_send_alert(ssl, SSL3_AL_FATAL,
368 cb_ret == 0 ? SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE
369 : SSL_AD_INTERNAL_ERROR);
370 ret = ssl_verify_invalid;
371 }
372 }
373
374 return ret;
375}
376
377// Verifies a stored certificate when resuming a session. A few things are
378// different from verify_peer_cert:
379// 1. We can't be renegotiating if we're resuming a session.
380// 2. The session is immutable, so we don't support verify_mode ==
381// SSL_VERIFY_NONE
382// 3. We don't call the OCSP callback.
383// 4. We only support custom verify callbacks.
384enum ssl_verify_result_t ssl_reverify_peer_cert(SSL_HANDSHAKE *hs) {
385 SSL *const ssl = hs->ssl;
386 assert(ssl->s3->established_session == nullptr);
387 assert(hs->config->verify_mode != SSL_VERIFY_NONE);
388
389 uint8_t alert = SSL_AD_CERTIFICATE_UNKNOWN;
390 enum ssl_verify_result_t ret = ssl_verify_invalid;
391 if (hs->config->custom_verify_callback != nullptr) {
392 ret = hs->config->custom_verify_callback(ssl, &alert);
393 }
394
395 if (ret == ssl_verify_invalid) {
396 OPENSSL_PUT_ERROR(SSL, SSL_R_CERTIFICATE_VERIFY_FAILED);
397 ssl_send_alert(ssl, SSL3_AL_FATAL, alert);
398 }
399
400 return ret;
401}
402
403uint16_t ssl_get_grease_value(SSL_HANDSHAKE *hs,
404 enum ssl_grease_index_t index) {
405 // Draw entropy for all GREASE values at once. This avoids calling
406 // |RAND_bytes| repeatedly and makes the values consistent within a
407 // connection. The latter is so the second ClientHello matches after
408 // HelloRetryRequest and so supported_groups and key_shares are consistent.
409 if (!hs->grease_seeded) {
410 RAND_bytes(hs->grease_seed, sizeof(hs->grease_seed));
411 hs->grease_seeded = true;
412 }
413
414 // This generates a random value of the form 0xωaωa, for all 0 ≤ ω < 16.
415 uint16_t ret = hs->grease_seed[index];
416 ret = (ret & 0xf0) | 0x0a;
417 ret |= ret << 8;
418 return ret;
419}
420
421enum ssl_hs_wait_t ssl_get_finished(SSL_HANDSHAKE *hs) {
422 SSL *const ssl = hs->ssl;
423 SSLMessage msg;
424 if (!ssl->method->get_message(ssl, &msg)) {
425 return ssl_hs_read_message;
426 }
427
428 if (!ssl_check_message_type(ssl, msg, SSL3_MT_FINISHED)) {
429 return ssl_hs_error;
430 }
431
432 // Snapshot the finished hash before incorporating the new message.
433 uint8_t finished[EVP_MAX_MD_SIZE];
434 size_t finished_len;
435 if (!hs->transcript.GetFinishedMAC(finished, &finished_len,
436 SSL_get_session(ssl), !ssl->server) ||
437 !ssl_hash_message(hs, msg)) {
438 return ssl_hs_error;
439 }
440
441 int finished_ok = CBS_mem_equal(&msg.body, finished, finished_len);
442#if defined(BORINGSSL_UNSAFE_FUZZER_MODE)
443 finished_ok = 1;
444#endif
445 if (!finished_ok) {
446 ssl_send_alert(ssl, SSL3_AL_FATAL, SSL_AD_DECRYPT_ERROR);
447 OPENSSL_PUT_ERROR(SSL, SSL_R_DIGEST_CHECK_FAILED);
448 return ssl_hs_error;
449 }
450
451 // Copy the Finished so we can use it for renegotiation checks.
452 if (finished_len > sizeof(ssl->s3->previous_client_finished) ||
453 finished_len > sizeof(ssl->s3->previous_server_finished)) {
454 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
455 return ssl_hs_error;
456 }
457
458 if (ssl->server) {
459 OPENSSL_memcpy(ssl->s3->previous_client_finished, finished, finished_len);
460 ssl->s3->previous_client_finished_len = finished_len;
461 } else {
462 OPENSSL_memcpy(ssl->s3->previous_server_finished, finished, finished_len);
463 ssl->s3->previous_server_finished_len = finished_len;
464 }
465
466 ssl->method->next_message(ssl);
467 return ssl_hs_ok;
468}
469
470bool ssl_send_finished(SSL_HANDSHAKE *hs) {
471 SSL *const ssl = hs->ssl;
472 const SSL_SESSION *session = SSL_get_session(ssl);
473
474 uint8_t finished[EVP_MAX_MD_SIZE];
475 size_t finished_len;
476 if (!hs->transcript.GetFinishedMAC(finished, &finished_len, session,
477 ssl->server)) {
478 return 0;
479 }
480
481 // Log the master secret, if logging is enabled.
482 if (!ssl_log_secret(ssl, "CLIENT_RANDOM", session->master_key,
483 session->master_key_length)) {
484 return 0;
485 }
486
487 // Copy the Finished so we can use it for renegotiation checks.
488 if (finished_len > sizeof(ssl->s3->previous_client_finished) ||
489 finished_len > sizeof(ssl->s3->previous_server_finished)) {
490 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
491 return 0;
492 }
493
494 if (ssl->server) {
495 OPENSSL_memcpy(ssl->s3->previous_server_finished, finished, finished_len);
496 ssl->s3->previous_server_finished_len = finished_len;
497 } else {
498 OPENSSL_memcpy(ssl->s3->previous_client_finished, finished, finished_len);
499 ssl->s3->previous_client_finished_len = finished_len;
500 }
501
502 ScopedCBB cbb;
503 CBB body;
504 if (!ssl->method->init_message(ssl, cbb.get(), &body, SSL3_MT_FINISHED) ||
505 !CBB_add_bytes(&body, finished, finished_len) ||
506 !ssl_add_message_cbb(ssl, cbb.get())) {
507 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
508 return 0;
509 }
510
511 return 1;
512}
513
514bool ssl_output_cert_chain(SSL_HANDSHAKE *hs) {
515 ScopedCBB cbb;
516 CBB body;
517 if (!hs->ssl->method->init_message(hs->ssl, cbb.get(), &body,
518 SSL3_MT_CERTIFICATE) ||
519 !ssl_add_cert_chain(hs, &body) ||
520 !ssl_add_message_cbb(hs->ssl, cbb.get())) {
521 OPENSSL_PUT_ERROR(SSL, ERR_R_INTERNAL_ERROR);
522 return false;
523 }
524
525 return true;
526}
527
528int ssl_run_handshake(SSL_HANDSHAKE *hs, bool *out_early_return) {
529 SSL *const ssl = hs->ssl;
530 for (;;) {
531 // Resolve the operation the handshake was waiting on.
532 switch (hs->wait) {
533 case ssl_hs_error:
534 ERR_restore_state(hs->error.get());
535 return -1;
536
537 case ssl_hs_flush: {
538 int ret = ssl->method->flush_flight(ssl);
539 if (ret <= 0) {
540 return ret;
541 }
542 break;
543 }
544
545 case ssl_hs_read_server_hello:
546 case ssl_hs_read_message:
547 case ssl_hs_read_change_cipher_spec: {
548 if (ssl->quic_method) {
549 hs->wait = ssl_hs_ok;
550 // The change cipher spec is omitted in QUIC.
551 if (hs->wait != ssl_hs_read_change_cipher_spec) {
552 ssl->s3->rwstate = SSL_READING;
553 return -1;
554 }
555 break;
556 }
557
558 uint8_t alert = SSL_AD_DECODE_ERROR;
559 size_t consumed = 0;
560 ssl_open_record_t ret;
561 if (hs->wait == ssl_hs_read_change_cipher_spec) {
562 ret = ssl_open_change_cipher_spec(ssl, &consumed, &alert,
563 ssl->s3->read_buffer.span());
564 } else {
565 ret = ssl_open_handshake(ssl, &consumed, &alert,
566 ssl->s3->read_buffer.span());
567 }
568 if (ret == ssl_open_record_error &&
569 hs->wait == ssl_hs_read_server_hello) {
570 uint32_t err = ERR_peek_error();
571 if (ERR_GET_LIB(err) == ERR_LIB_SSL &&
572 ERR_GET_REASON(err) == SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE) {
573 // Add a dedicated error code to the queue for a handshake_failure
574 // alert in response to ClientHello. This matches NSS's client
575 // behavior and gives a better error on a (probable) failure to
576 // negotiate initial parameters. Note: this error code comes after
577 // the original one.
578 //
579 // See https://crbug.com/446505.
580 OPENSSL_PUT_ERROR(SSL, SSL_R_HANDSHAKE_FAILURE_ON_CLIENT_HELLO);
581 }
582 }
583 bool retry;
584 int bio_ret = ssl_handle_open_record(ssl, &retry, ret, consumed, alert);
585 if (bio_ret <= 0) {
586 return bio_ret;
587 }
588 if (retry) {
589 continue;
590 }
591 ssl->s3->read_buffer.DiscardConsumed();
592 break;
593 }
594
595 case ssl_hs_read_end_of_early_data: {
596 if (ssl->s3->hs->can_early_read) {
597 // While we are processing early data, the handshake returns early.
598 *out_early_return = true;
599 return 1;
600 }
601 hs->wait = ssl_hs_ok;
602 break;
603 }
604
605 case ssl_hs_certificate_selection_pending:
606 ssl->s3->rwstate = SSL_CERTIFICATE_SELECTION_PENDING;
607 hs->wait = ssl_hs_ok;
608 return -1;
609
610 case ssl_hs_handoff:
611 ssl->s3->rwstate = SSL_HANDOFF;
612 hs->wait = ssl_hs_ok;
613 return -1;
614
615 case ssl_hs_handback:
616 ssl->s3->rwstate = SSL_HANDBACK;
617 hs->wait = ssl_hs_handback;
618 return -1;
619
620 case ssl_hs_x509_lookup:
621 ssl->s3->rwstate = SSL_X509_LOOKUP;
622 hs->wait = ssl_hs_ok;
623 return -1;
624
625 case ssl_hs_channel_id_lookup:
626 ssl->s3->rwstate = SSL_CHANNEL_ID_LOOKUP;
627 hs->wait = ssl_hs_ok;
628 return -1;
629
630 case ssl_hs_private_key_operation:
631 ssl->s3->rwstate = SSL_PRIVATE_KEY_OPERATION;
632 hs->wait = ssl_hs_ok;
633 return -1;
634
635 case ssl_hs_pending_session:
636 ssl->s3->rwstate = SSL_PENDING_SESSION;
637 hs->wait = ssl_hs_ok;
638 return -1;
639
640 case ssl_hs_pending_ticket:
641 ssl->s3->rwstate = SSL_PENDING_TICKET;
642 hs->wait = ssl_hs_ok;
643 return -1;
644
645 case ssl_hs_certificate_verify:
646 ssl->s3->rwstate = SSL_CERTIFICATE_VERIFY;
647 hs->wait = ssl_hs_ok;
648 return -1;
649
650 case ssl_hs_early_data_rejected:
651 assert(ssl->s3->early_data_reason != ssl_early_data_unknown);
652 ssl->s3->rwstate = SSL_EARLY_DATA_REJECTED;
653 // Cause |SSL_write| to start failing immediately.
654 hs->can_early_write = false;
655 return -1;
656
657 case ssl_hs_early_return:
658 *out_early_return = true;
659 hs->wait = ssl_hs_ok;
660 return 1;
661
662 case ssl_hs_ok:
663 break;
664 }
665
666 // Run the state machine again.
667 hs->wait = ssl->do_handshake(hs);
668 if (hs->wait == ssl_hs_error) {
669 hs->error.reset(ERR_save_state());
670 return -1;
671 }
672 if (hs->wait == ssl_hs_ok) {
673 // The handshake has completed.
674 *out_early_return = false;
675 return 1;
676 }
677
678 // Otherwise, loop to the beginning and resolve what was blocking the
679 // handshake.
680 }
681}
682
683BSSL_NAMESPACE_END
684