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source: vbox/trunk/src/libs/openssl-1.1.1l/ssl/ssl_lib.c@ 95000

Last change on this file since 95000 was 91772, checked in by vboxsync, 3 years ago

openssl-1.1.1l: Applied and adjusted our OpenSSL changes to 1.1.1l. bugref:10126
File size: 157.9 KB
Line 
1/*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 * Copyright 2005 Nokia. All rights reserved.
5 *
6 * Licensed under the OpenSSL license (the "License"). You may not use
7 * this file except in compliance with the License. You can obtain a copy
8 * in the file LICENSE in the source distribution or at
9 * https://www.openssl.org/source/license.html
10 */
11
12#include <stdio.h>
13#include "ssl_local.h"
14#include <openssl/objects.h>
15#include <openssl/x509v3.h>
16#include <openssl/rand.h>
17#include <openssl/rand_drbg.h>
18#include <openssl/ocsp.h>
19#include <openssl/dh.h>
20#include <openssl/engine.h>
21#include <openssl/async.h>
22#include <openssl/ct.h>
23#include "internal/cryptlib.h"
24#include "internal/refcount.h"
25
26const char SSL_version_str[] = OPENSSL_VERSION_TEXT;
27
28static int ssl_undefined_function_1(SSL *ssl, SSL3_RECORD *r, size_t s, int t)
29{
30 (void)r;
31 (void)s;
32 (void)t;
33 return ssl_undefined_function(ssl);
34}
35
36static int ssl_undefined_function_2(SSL *ssl, SSL3_RECORD *r, unsigned char *s,
37 int t)
38{
39 (void)r;
40 (void)s;
41 (void)t;
42 return ssl_undefined_function(ssl);
43}
44
45static int ssl_undefined_function_3(SSL *ssl, unsigned char *r,
46 unsigned char *s, size_t t, size_t *u)
47{
48 (void)r;
49 (void)s;
50 (void)t;
51 (void)u;
52 return ssl_undefined_function(ssl);
53}
54
55static int ssl_undefined_function_4(SSL *ssl, int r)
56{
57 (void)r;
58 return ssl_undefined_function(ssl);
59}
60
61static size_t ssl_undefined_function_5(SSL *ssl, const char *r, size_t s,
62 unsigned char *t)
63{
64 (void)r;
65 (void)s;
66 (void)t;
67 return ssl_undefined_function(ssl);
68}
69
70static int ssl_undefined_function_6(int r)
71{
72 (void)r;
73 return ssl_undefined_function(NULL);
74}
75
76static int ssl_undefined_function_7(SSL *ssl, unsigned char *r, size_t s,
77 const char *t, size_t u,
78 const unsigned char *v, size_t w, int x)
79{
80 (void)r;
81 (void)s;
82 (void)t;
83 (void)u;
84 (void)v;
85 (void)w;
86 (void)x;
87 return ssl_undefined_function(ssl);
88}
89
90SSL3_ENC_METHOD ssl3_undef_enc_method = {
91 ssl_undefined_function_1,
92 ssl_undefined_function_2,
93 ssl_undefined_function,
94 ssl_undefined_function_3,
95 ssl_undefined_function_4,
96 ssl_undefined_function_5,
97 NULL, /* client_finished_label */
98 0, /* client_finished_label_len */
99 NULL, /* server_finished_label */
100 0, /* server_finished_label_len */
101 ssl_undefined_function_6,
102 ssl_undefined_function_7,
103};
104
105struct ssl_async_args {
106 SSL *s;
107 void *buf;
108 size_t num;
109 enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
110 union {
111 int (*func_read) (SSL *, void *, size_t, size_t *);
112 int (*func_write) (SSL *, const void *, size_t, size_t *);
113 int (*func_other) (SSL *);
114 } f;
115};
116
117static const struct {
118 uint8_t mtype;
119 uint8_t ord;
120 int nid;
121} dane_mds[] = {
122 {
123 DANETLS_MATCHING_FULL, 0, NID_undef
124 },
125 {
126 DANETLS_MATCHING_2256, 1, NID_sha256
127 },
128 {
129 DANETLS_MATCHING_2512, 2, NID_sha512
130 },
131};
132
133static int dane_ctx_enable(struct dane_ctx_st *dctx)
134{
135 const EVP_MD **mdevp;
136 uint8_t *mdord;
137 uint8_t mdmax = DANETLS_MATCHING_LAST;
138 int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */
139 size_t i;
140
141 if (dctx->mdevp != NULL)
142 return 1;
143
144 mdevp = OPENSSL_zalloc(n * sizeof(*mdevp));
145 mdord = OPENSSL_zalloc(n * sizeof(*mdord));
146
147 if (mdord == NULL || mdevp == NULL) {
148 OPENSSL_free(mdord);
149 OPENSSL_free(mdevp);
150 SSLerr(SSL_F_DANE_CTX_ENABLE, ERR_R_MALLOC_FAILURE);
151 return 0;
152 }
153
154 /* Install default entries */
155 for (i = 0; i < OSSL_NELEM(dane_mds); ++i) {
156 const EVP_MD *md;
157
158 if (dane_mds[i].nid == NID_undef ||
159 (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL)
160 continue;
161 mdevp[dane_mds[i].mtype] = md;
162 mdord[dane_mds[i].mtype] = dane_mds[i].ord;
163 }
164
165 dctx->mdevp = mdevp;
166 dctx->mdord = mdord;
167 dctx->mdmax = mdmax;
168
169 return 1;
170}
171
172static void dane_ctx_final(struct dane_ctx_st *dctx)
173{
174 OPENSSL_free(dctx->mdevp);
175 dctx->mdevp = NULL;
176
177 OPENSSL_free(dctx->mdord);
178 dctx->mdord = NULL;
179 dctx->mdmax = 0;
180}
181
182static void tlsa_free(danetls_record *t)
183{
184 if (t == NULL)
185 return;
186 OPENSSL_free(t->data);
187 EVP_PKEY_free(t->spki);
188 OPENSSL_free(t);
189}
190
191static void dane_final(SSL_DANE *dane)
192{
193 sk_danetls_record_pop_free(dane->trecs, tlsa_free);
194 dane->trecs = NULL;
195
196 sk_X509_pop_free(dane->certs, X509_free);
197 dane->certs = NULL;
198
199 X509_free(dane->mcert);
200 dane->mcert = NULL;
201 dane->mtlsa = NULL;
202 dane->mdpth = -1;
203 dane->pdpth = -1;
204}
205
206/*
207 * dane_copy - Copy dane configuration, sans verification state.
208 */
209static int ssl_dane_dup(SSL *to, SSL *from)
210{
211 int num;
212 int i;
213
214 if (!DANETLS_ENABLED(&from->dane))
215 return 1;
216
217 num = sk_danetls_record_num(from->dane.trecs);
218 dane_final(&to->dane);
219 to->dane.flags = from->dane.flags;
220 to->dane.dctx = &to->ctx->dane;
221 to->dane.trecs = sk_danetls_record_new_reserve(NULL, num);
222
223 if (to->dane.trecs == NULL) {
224 SSLerr(SSL_F_SSL_DANE_DUP, ERR_R_MALLOC_FAILURE);
225 return 0;
226 }
227
228 for (i = 0; i < num; ++i) {
229 danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
230
231 if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype,
232 t->data, t->dlen) <= 0)
233 return 0;
234 }
235 return 1;
236}
237
238static int dane_mtype_set(struct dane_ctx_st *dctx,
239 const EVP_MD *md, uint8_t mtype, uint8_t ord)
240{
241 int i;
242
243 if (mtype == DANETLS_MATCHING_FULL && md != NULL) {
244 SSLerr(SSL_F_DANE_MTYPE_SET, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL);
245 return 0;
246 }
247
248 if (mtype > dctx->mdmax) {
249 const EVP_MD **mdevp;
250 uint8_t *mdord;
251 int n = ((int)mtype) + 1;
252
253 mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp));
254 if (mdevp == NULL) {
255 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
256 return -1;
257 }
258 dctx->mdevp = mdevp;
259
260 mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
261 if (mdord == NULL) {
262 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
263 return -1;
264 }
265 dctx->mdord = mdord;
266
267 /* Zero-fill any gaps */
268 for (i = dctx->mdmax + 1; i < mtype; ++i) {
269 mdevp[i] = NULL;
270 mdord[i] = 0;
271 }
272
273 dctx->mdmax = mtype;
274 }
275
276 dctx->mdevp[mtype] = md;
277 /* Coerce ordinal of disabled matching types to 0 */
278 dctx->mdord[mtype] = (md == NULL) ? 0 : ord;
279
280 return 1;
281}
282
283static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype)
284{
285 if (mtype > dane->dctx->mdmax)
286 return NULL;
287 return dane->dctx->mdevp[mtype];
288}
289
290static int dane_tlsa_add(SSL_DANE *dane,
291 uint8_t usage,
292 uint8_t selector,
293 uint8_t mtype, unsigned const char *data, size_t dlen)
294{
295 danetls_record *t;
296 const EVP_MD *md = NULL;
297 int ilen = (int)dlen;
298 int i;
299 int num;
300
301 if (dane->trecs == NULL) {
302 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_NOT_ENABLED);
303 return -1;
304 }
305
306 if (ilen < 0 || dlen != (size_t)ilen) {
307 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
308 return 0;
309 }
310
311 if (usage > DANETLS_USAGE_LAST) {
312 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
313 return 0;
314 }
315
316 if (selector > DANETLS_SELECTOR_LAST) {
317 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_SELECTOR);
318 return 0;
319 }
320
321 if (mtype != DANETLS_MATCHING_FULL) {
322 md = tlsa_md_get(dane, mtype);
323 if (md == NULL) {
324 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
325 return 0;
326 }
327 }
328
329 if (md != NULL && dlen != (size_t)EVP_MD_size(md)) {
330 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
331 return 0;
332 }
333 if (!data) {
334 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_NULL_DATA);
335 return 0;
336 }
337
338 if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) {
339 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
340 return -1;
341 }
342
343 t->usage = usage;
344 t->selector = selector;
345 t->mtype = mtype;
346 t->data = OPENSSL_malloc(dlen);
347 if (t->data == NULL) {
348 tlsa_free(t);
349 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
350 return -1;
351 }
352 memcpy(t->data, data, dlen);
353 t->dlen = dlen;
354
355 /* Validate and cache full certificate or public key */
356 if (mtype == DANETLS_MATCHING_FULL) {
357 const unsigned char *p = data;
358 X509 *cert = NULL;
359 EVP_PKEY *pkey = NULL;
360
361 switch (selector) {
362 case DANETLS_SELECTOR_CERT:
363 if (!d2i_X509(&cert, &p, ilen) || p < data ||
364 dlen != (size_t)(p - data)) {
365 tlsa_free(t);
366 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
367 return 0;
368 }
369 if (X509_get0_pubkey(cert) == NULL) {
370 tlsa_free(t);
371 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
372 return 0;
373 }
374
375 if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) {
376 X509_free(cert);
377 break;
378 }
379
380 /*
381 * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA
382 * records that contain full certificates of trust-anchors that are
383 * not present in the wire chain. For usage PKIX-TA(0), we augment
384 * the chain with untrusted Full(0) certificates from DNS, in case
385 * they are missing from the chain.
386 */
387 if ((dane->certs == NULL &&
388 (dane->certs = sk_X509_new_null()) == NULL) ||
389 !sk_X509_push(dane->certs, cert)) {
390 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
391 X509_free(cert);
392 tlsa_free(t);
393 return -1;
394 }
395 break;
396
397 case DANETLS_SELECTOR_SPKI:
398 if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
399 dlen != (size_t)(p - data)) {
400 tlsa_free(t);
401 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
402 return 0;
403 }
404
405 /*
406 * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA
407 * records that contain full bare keys of trust-anchors that are
408 * not present in the wire chain.
409 */
410 if (usage == DANETLS_USAGE_DANE_TA)
411 t->spki = pkey;
412 else
413 EVP_PKEY_free(pkey);
414 break;
415 }
416 }
417
418 /*-
419 * Find the right insertion point for the new record.
420 *
421 * See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that
422 * they can be processed first, as they require no chain building, and no
423 * expiration or hostname checks. Because DANE-EE(3) is numerically
424 * largest, this is accomplished via descending sort by "usage".
425 *
426 * We also sort in descending order by matching ordinal to simplify
427 * the implementation of digest agility in the verification code.
428 *
429 * The choice of order for the selector is not significant, so we
430 * use the same descending order for consistency.
431 */
432 num = sk_danetls_record_num(dane->trecs);
433 for (i = 0; i < num; ++i) {
434 danetls_record *rec = sk_danetls_record_value(dane->trecs, i);
435
436 if (rec->usage > usage)
437 continue;
438 if (rec->usage < usage)
439 break;
440 if (rec->selector > selector)
441 continue;
442 if (rec->selector < selector)
443 break;
444 if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype])
445 continue;
446 break;
447 }
448
449 if (!sk_danetls_record_insert(dane->trecs, t, i)) {
450 tlsa_free(t);
451 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
452 return -1;
453 }
454 dane->umask |= DANETLS_USAGE_BIT(usage);
455
456 return 1;
457}
458
459/*
460 * Return 0 if there is only one version configured and it was disabled
461 * at configure time. Return 1 otherwise.
462 */
463static int ssl_check_allowed_versions(int min_version, int max_version)
464{
465 int minisdtls = 0, maxisdtls = 0;
466
467 /* Figure out if we're doing DTLS versions or TLS versions */
468 if (min_version == DTLS1_BAD_VER
469 || min_version >> 8 == DTLS1_VERSION_MAJOR)
470 minisdtls = 1;
471 if (max_version == DTLS1_BAD_VER
472 || max_version >> 8 == DTLS1_VERSION_MAJOR)
473 maxisdtls = 1;
474 /* A wildcard version of 0 could be DTLS or TLS. */
475 if ((minisdtls && !maxisdtls && max_version != 0)
476 || (maxisdtls && !minisdtls && min_version != 0)) {
477 /* Mixing DTLS and TLS versions will lead to sadness; deny it. */
478 return 0;
479 }
480
481 if (minisdtls || maxisdtls) {
482 /* Do DTLS version checks. */
483 if (min_version == 0)
484 /* Ignore DTLS1_BAD_VER */
485 min_version = DTLS1_VERSION;
486 if (max_version == 0)
487 max_version = DTLS1_2_VERSION;
488#ifdef OPENSSL_NO_DTLS1_2
489 if (max_version == DTLS1_2_VERSION)
490 max_version = DTLS1_VERSION;
491#endif
492#ifdef OPENSSL_NO_DTLS1
493 if (min_version == DTLS1_VERSION)
494 min_version = DTLS1_2_VERSION;
495#endif
496 /* Done massaging versions; do the check. */
497 if (0
498#ifdef OPENSSL_NO_DTLS1
499 || (DTLS_VERSION_GE(min_version, DTLS1_VERSION)
500 && DTLS_VERSION_GE(DTLS1_VERSION, max_version))
501#endif
502#ifdef OPENSSL_NO_DTLS1_2
503 || (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION)
504 && DTLS_VERSION_GE(DTLS1_2_VERSION, max_version))
505#endif
506 )
507 return 0;
508 } else {
509 /* Regular TLS version checks. */
510 if (min_version == 0)
511 min_version = SSL3_VERSION;
512 if (max_version == 0)
513 max_version = TLS1_3_VERSION;
514#ifdef OPENSSL_NO_TLS1_3
515 if (max_version == TLS1_3_VERSION)
516 max_version = TLS1_2_VERSION;
517#endif
518#ifdef OPENSSL_NO_TLS1_2
519 if (max_version == TLS1_2_VERSION)
520 max_version = TLS1_1_VERSION;
521#endif
522#ifdef OPENSSL_NO_TLS1_1
523 if (max_version == TLS1_1_VERSION)
524 max_version = TLS1_VERSION;
525#endif
526#ifdef OPENSSL_NO_TLS1
527 if (max_version == TLS1_VERSION)
528 max_version = SSL3_VERSION;
529#endif
530#ifdef OPENSSL_NO_SSL3
531 if (min_version == SSL3_VERSION)
532 min_version = TLS1_VERSION;
533#endif
534#ifdef OPENSSL_NO_TLS1
535 if (min_version == TLS1_VERSION)
536 min_version = TLS1_1_VERSION;
537#endif
538#ifdef OPENSSL_NO_TLS1_1
539 if (min_version == TLS1_1_VERSION)
540 min_version = TLS1_2_VERSION;
541#endif
542#ifdef OPENSSL_NO_TLS1_2
543 if (min_version == TLS1_2_VERSION)
544 min_version = TLS1_3_VERSION;
545#endif
546 /* Done massaging versions; do the check. */
547 if (0
548#ifdef OPENSSL_NO_SSL3
549 || (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version)
550#endif
551#ifdef OPENSSL_NO_TLS1
552 || (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version)
553#endif
554#ifdef OPENSSL_NO_TLS1_1
555 || (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version)
556#endif
557#ifdef OPENSSL_NO_TLS1_2
558 || (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version)
559#endif
560#ifdef OPENSSL_NO_TLS1_3
561 || (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version)
562#endif
563 )
564 return 0;
565 }
566 return 1;
567}
568
569static void clear_ciphers(SSL *s)
570{
571 /* clear the current cipher */
572 ssl_clear_cipher_ctx(s);
573 ssl_clear_hash_ctx(&s->read_hash);
574 ssl_clear_hash_ctx(&s->write_hash);
575}
576
577int SSL_clear(SSL *s)
578{
579 if (s->method == NULL) {
580 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED);
581 return 0;
582 }
583
584 if (ssl_clear_bad_session(s)) {
585 SSL_SESSION_free(s->session);
586 s->session = NULL;
587 }
588 SSL_SESSION_free(s->psksession);
589 s->psksession = NULL;
590 OPENSSL_free(s->psksession_id);
591 s->psksession_id = NULL;
592 s->psksession_id_len = 0;
593 s->hello_retry_request = 0;
594 s->sent_tickets = 0;
595
596 s->error = 0;
597 s->hit = 0;
598 s->shutdown = 0;
599
600 if (s->renegotiate) {
601 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
602 return 0;
603 }
604
605 ossl_statem_clear(s);
606
607 s->version = s->method->version;
608 s->client_version = s->version;
609 s->rwstate = SSL_NOTHING;
610
611 BUF_MEM_free(s->init_buf);
612 s->init_buf = NULL;
613 clear_ciphers(s);
614 s->first_packet = 0;
615
616 s->key_update = SSL_KEY_UPDATE_NONE;
617
618 EVP_MD_CTX_free(s->pha_dgst);
619 s->pha_dgst = NULL;
620
621 /* Reset DANE verification result state */
622 s->dane.mdpth = -1;
623 s->dane.pdpth = -1;
624 X509_free(s->dane.mcert);
625 s->dane.mcert = NULL;
626 s->dane.mtlsa = NULL;
627
628 /* Clear the verification result peername */
629 X509_VERIFY_PARAM_move_peername(s->param, NULL);
630
631 /* Clear any shared connection state */
632 OPENSSL_free(s->shared_sigalgs);
633 s->shared_sigalgs = NULL;
634 s->shared_sigalgslen = 0;
635
636 /*
637 * Check to see if we were changed into a different method, if so, revert
638 * back.
639 */
640 if (s->method != s->ctx->method) {
641 s->method->ssl_free(s);
642 s->method = s->ctx->method;
643 if (!s->method->ssl_new(s))
644 return 0;
645 } else {
646 if (!s->method->ssl_clear(s))
647 return 0;
648 }
649
650 RECORD_LAYER_clear(&s->rlayer);
651
652 return 1;
653}
654
655/** Used to change an SSL_CTXs default SSL method type */
656int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
657{
658 STACK_OF(SSL_CIPHER) *sk;
659
660 ctx->method = meth;
661
662 if (!SSL_CTX_set_ciphersuites(ctx, TLS_DEFAULT_CIPHERSUITES)) {
663 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
664 return 0;
665 }
666 sk = ssl_create_cipher_list(ctx->method,
667 ctx->tls13_ciphersuites,
668 &(ctx->cipher_list),
669 &(ctx->cipher_list_by_id),
670 SSL_DEFAULT_CIPHER_LIST, ctx->cert);
671 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
672 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
673 return 0;
674 }
675 return 1;
676}
677
678SSL *SSL_new(SSL_CTX *ctx)
679{
680 SSL *s;
681
682 if (ctx == NULL) {
683 SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX);
684 return NULL;
685 }
686 if (ctx->method == NULL) {
687 SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
688 return NULL;
689 }
690
691 s = OPENSSL_zalloc(sizeof(*s));
692 if (s == NULL)
693 goto err;
694
695 s->references = 1;
696 s->lock = CRYPTO_THREAD_lock_new();
697 if (s->lock == NULL) {
698 OPENSSL_free(s);
699 s = NULL;
700 goto err;
701 }
702
703 RECORD_LAYER_init(&s->rlayer, s);
704
705 s->options = ctx->options;
706 s->dane.flags = ctx->dane.flags;
707 s->min_proto_version = ctx->min_proto_version;
708 s->max_proto_version = ctx->max_proto_version;
709 s->mode = ctx->mode;
710 s->max_cert_list = ctx->max_cert_list;
711 s->max_early_data = ctx->max_early_data;
712 s->recv_max_early_data = ctx->recv_max_early_data;
713 s->num_tickets = ctx->num_tickets;
714 s->pha_enabled = ctx->pha_enabled;
715
716 /* Shallow copy of the ciphersuites stack */
717 s->tls13_ciphersuites = sk_SSL_CIPHER_dup(ctx->tls13_ciphersuites);
718 if (s->tls13_ciphersuites == NULL)
719 goto err;
720
721 /*
722 * Earlier library versions used to copy the pointer to the CERT, not
723 * its contents; only when setting new parameters for the per-SSL
724 * copy, ssl_cert_new would be called (and the direct reference to
725 * the per-SSL_CTX settings would be lost, but those still were
726 * indirectly accessed for various purposes, and for that reason they
727 * used to be known as s->ctx->default_cert). Now we don't look at the
728 * SSL_CTX's CERT after having duplicated it once.
729 */
730 s->cert = ssl_cert_dup(ctx->cert);
731 if (s->cert == NULL)
732 goto err;
733
734 RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
735 s->msg_callback = ctx->msg_callback;
736 s->msg_callback_arg = ctx->msg_callback_arg;
737 s->verify_mode = ctx->verify_mode;
738 s->not_resumable_session_cb = ctx->not_resumable_session_cb;
739 s->record_padding_cb = ctx->record_padding_cb;
740 s->record_padding_arg = ctx->record_padding_arg;
741 s->block_padding = ctx->block_padding;
742 s->sid_ctx_length = ctx->sid_ctx_length;
743 if (!ossl_assert(s->sid_ctx_length <= sizeof(s->sid_ctx)))
744 goto err;
745 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
746 s->verify_callback = ctx->default_verify_callback;
747 s->generate_session_id = ctx->generate_session_id;
748
749 s->param = X509_VERIFY_PARAM_new();
750 if (s->param == NULL)
751 goto err;
752 X509_VERIFY_PARAM_inherit(s->param, ctx->param);
753 s->quiet_shutdown = ctx->quiet_shutdown;
754
755 s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode;
756 s->max_send_fragment = ctx->max_send_fragment;
757 s->split_send_fragment = ctx->split_send_fragment;
758 s->max_pipelines = ctx->max_pipelines;
759 if (s->max_pipelines > 1)
760 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
761 if (ctx->default_read_buf_len > 0)
762 SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len);
763
764 SSL_CTX_up_ref(ctx);
765 s->ctx = ctx;
766 s->ext.debug_cb = 0;
767 s->ext.debug_arg = NULL;
768 s->ext.ticket_expected = 0;
769 s->ext.status_type = ctx->ext.status_type;
770 s->ext.status_expected = 0;
771 s->ext.ocsp.ids = NULL;
772 s->ext.ocsp.exts = NULL;
773 s->ext.ocsp.resp = NULL;
774 s->ext.ocsp.resp_len = 0;
775 SSL_CTX_up_ref(ctx);
776 s->session_ctx = ctx;
777#ifndef OPENSSL_NO_EC
778 if (ctx->ext.ecpointformats) {
779 s->ext.ecpointformats =
780 OPENSSL_memdup(ctx->ext.ecpointformats,
781 ctx->ext.ecpointformats_len);
782 if (!s->ext.ecpointformats) {
783 s->ext.ecpointformats_len = 0;
784 goto err;
785 }
786 s->ext.ecpointformats_len =
787 ctx->ext.ecpointformats_len;
788 }
789 if (ctx->ext.supportedgroups) {
790 s->ext.supportedgroups =
791 OPENSSL_memdup(ctx->ext.supportedgroups,
792 ctx->ext.supportedgroups_len
793 * sizeof(*ctx->ext.supportedgroups));
794 if (!s->ext.supportedgroups) {
795 s->ext.supportedgroups_len = 0;
796 goto err;
797 }
798 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
799 }
800#endif
801#ifndef OPENSSL_NO_NEXTPROTONEG
802 s->ext.npn = NULL;
803#endif
804
805 if (s->ctx->ext.alpn) {
806 s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
807 if (s->ext.alpn == NULL) {
808 s->ext.alpn_len = 0;
809 goto err;
810 }
811 memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
812 s->ext.alpn_len = s->ctx->ext.alpn_len;
813 }
814
815 s->verified_chain = NULL;
816 s->verify_result = X509_V_OK;
817
818 s->default_passwd_callback = ctx->default_passwd_callback;
819 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
820
821 s->method = ctx->method;
822
823 s->key_update = SSL_KEY_UPDATE_NONE;
824
825 s->allow_early_data_cb = ctx->allow_early_data_cb;
826 s->allow_early_data_cb_data = ctx->allow_early_data_cb_data;
827
828 if (!s->method->ssl_new(s))
829 goto err;
830
831 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
832
833 if (!SSL_clear(s))
834 goto err;
835
836 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
837 goto err;
838
839#ifndef OPENSSL_NO_PSK
840 s->psk_client_callback = ctx->psk_client_callback;
841 s->psk_server_callback = ctx->psk_server_callback;
842#endif
843 s->psk_find_session_cb = ctx->psk_find_session_cb;
844 s->psk_use_session_cb = ctx->psk_use_session_cb;
845
846 s->job = NULL;
847
848#ifndef OPENSSL_NO_CT
849 if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
850 ctx->ct_validation_callback_arg))
851 goto err;
852#endif
853
854 return s;
855 err:
856 SSL_free(s);
857 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
858 return NULL;
859}
860
861int SSL_is_dtls(const SSL *s)
862{
863 return SSL_IS_DTLS(s) ? 1 : 0;
864}
865
866int SSL_up_ref(SSL *s)
867{
868 int i;
869
870 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
871 return 0;
872
873 REF_PRINT_COUNT("SSL", s);
874 REF_ASSERT_ISNT(i < 2);
875 return ((i > 1) ? 1 : 0);
876}
877
878int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
879 unsigned int sid_ctx_len)
880{
881 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
882 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
883 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
884 return 0;
885 }
886 ctx->sid_ctx_length = sid_ctx_len;
887 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
888
889 return 1;
890}
891
892int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
893 unsigned int sid_ctx_len)
894{
895 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
896 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
897 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
898 return 0;
899 }
900 ssl->sid_ctx_length = sid_ctx_len;
901 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
902
903 return 1;
904}
905
906int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
907{
908 CRYPTO_THREAD_write_lock(ctx->lock);
909 ctx->generate_session_id = cb;
910 CRYPTO_THREAD_unlock(ctx->lock);
911 return 1;
912}
913
914int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
915{
916 CRYPTO_THREAD_write_lock(ssl->lock);
917 ssl->generate_session_id = cb;
918 CRYPTO_THREAD_unlock(ssl->lock);
919 return 1;
920}
921
922int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
923 unsigned int id_len)
924{
925 /*
926 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
927 * we can "construct" a session to give us the desired check - i.e. to
928 * find if there's a session in the hash table that would conflict with
929 * any new session built out of this id/id_len and the ssl_version in use
930 * by this SSL.
931 */
932 SSL_SESSION r, *p;
933
934 if (id_len > sizeof(r.session_id))
935 return 0;
936
937 r.ssl_version = ssl->version;
938 r.session_id_length = id_len;
939 memcpy(r.session_id, id, id_len);
940
941 CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
942 p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
943 CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
944 return (p != NULL);
945}
946
947int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
948{
949 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
950}
951
952int SSL_set_purpose(SSL *s, int purpose)
953{
954 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
955}
956
957int SSL_CTX_set_trust(SSL_CTX *s, int trust)
958{
959 return X509_VERIFY_PARAM_set_trust(s->param, trust);
960}
961
962int SSL_set_trust(SSL *s, int trust)
963{
964 return X509_VERIFY_PARAM_set_trust(s->param, trust);
965}
966
967int SSL_set1_host(SSL *s, const char *hostname)
968{
969 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
970}
971
972int SSL_add1_host(SSL *s, const char *hostname)
973{
974 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
975}
976
977void SSL_set_hostflags(SSL *s, unsigned int flags)
978{
979 X509_VERIFY_PARAM_set_hostflags(s->param, flags);
980}
981
982const char *SSL_get0_peername(SSL *s)
983{
984 return X509_VERIFY_PARAM_get0_peername(s->param);
985}
986
987int SSL_CTX_dane_enable(SSL_CTX *ctx)
988{
989 return dane_ctx_enable(&ctx->dane);
990}
991
992unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
993{
994 unsigned long orig = ctx->dane.flags;
995
996 ctx->dane.flags |= flags;
997 return orig;
998}
999
1000unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
1001{
1002 unsigned long orig = ctx->dane.flags;
1003
1004 ctx->dane.flags &= ~flags;
1005 return orig;
1006}
1007
1008int SSL_dane_enable(SSL *s, const char *basedomain)
1009{
1010 SSL_DANE *dane = &s->dane;
1011
1012 if (s->ctx->dane.mdmax == 0) {
1013 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED);
1014 return 0;
1015 }
1016 if (dane->trecs != NULL) {
1017 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED);
1018 return 0;
1019 }
1020
1021 /*
1022 * Default SNI name. This rejects empty names, while set1_host below
1023 * accepts them and disables host name checks. To avoid side-effects with
1024 * invalid input, set the SNI name first.
1025 */
1026 if (s->ext.hostname == NULL) {
1027 if (!SSL_set_tlsext_host_name(s, basedomain)) {
1028 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1029 return -1;
1030 }
1031 }
1032
1033 /* Primary RFC6125 reference identifier */
1034 if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
1035 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1036 return -1;
1037 }
1038
1039 dane->mdpth = -1;
1040 dane->pdpth = -1;
1041 dane->dctx = &s->ctx->dane;
1042 dane->trecs = sk_danetls_record_new_null();
1043
1044 if (dane->trecs == NULL) {
1045 SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE);
1046 return -1;
1047 }
1048 return 1;
1049}
1050
1051unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
1052{
1053 unsigned long orig = ssl->dane.flags;
1054
1055 ssl->dane.flags |= flags;
1056 return orig;
1057}
1058
1059unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
1060{
1061 unsigned long orig = ssl->dane.flags;
1062
1063 ssl->dane.flags &= ~flags;
1064 return orig;
1065}
1066
1067int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
1068{
1069 SSL_DANE *dane = &s->dane;
1070
1071 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1072 return -1;
1073 if (dane->mtlsa) {
1074 if (mcert)
1075 *mcert = dane->mcert;
1076 if (mspki)
1077 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
1078 }
1079 return dane->mdpth;
1080}
1081
1082int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
1083 uint8_t *mtype, unsigned const char **data, size_t *dlen)
1084{
1085 SSL_DANE *dane = &s->dane;
1086
1087 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1088 return -1;
1089 if (dane->mtlsa) {
1090 if (usage)
1091 *usage = dane->mtlsa->usage;
1092 if (selector)
1093 *selector = dane->mtlsa->selector;
1094 if (mtype)
1095 *mtype = dane->mtlsa->mtype;
1096 if (data)
1097 *data = dane->mtlsa->data;
1098 if (dlen)
1099 *dlen = dane->mtlsa->dlen;
1100 }
1101 return dane->mdpth;
1102}
1103
1104SSL_DANE *SSL_get0_dane(SSL *s)
1105{
1106 return &s->dane;
1107}
1108
1109int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
1110 uint8_t mtype, unsigned const char *data, size_t dlen)
1111{
1112 return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen);
1113}
1114
1115int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
1116 uint8_t ord)
1117{
1118 return dane_mtype_set(&ctx->dane, md, mtype, ord);
1119}
1120
1121int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
1122{
1123 return X509_VERIFY_PARAM_set1(ctx->param, vpm);
1124}
1125
1126int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
1127{
1128 return X509_VERIFY_PARAM_set1(ssl->param, vpm);
1129}
1130
1131X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
1132{
1133 return ctx->param;
1134}
1135
1136X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
1137{
1138 return ssl->param;
1139}
1140
1141void SSL_certs_clear(SSL *s)
1142{
1143 ssl_cert_clear_certs(s->cert);
1144}
1145
1146void SSL_free(SSL *s)
1147{
1148 int i;
1149
1150 if (s == NULL)
1151 return;
1152 CRYPTO_DOWN_REF(&s->references, &i, s->lock);
1153 REF_PRINT_COUNT("SSL", s);
1154 if (i > 0)
1155 return;
1156 REF_ASSERT_ISNT(i < 0);
1157
1158 X509_VERIFY_PARAM_free(s->param);
1159 dane_final(&s->dane);
1160 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
1161
1162 /* Ignore return value */
1163 ssl_free_wbio_buffer(s);
1164
1165 BIO_free_all(s->wbio);
1166 BIO_free_all(s->rbio);
1167
1168 BUF_MEM_free(s->init_buf);
1169
1170 /* add extra stuff */
1171 sk_SSL_CIPHER_free(s->cipher_list);
1172 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1173 sk_SSL_CIPHER_free(s->tls13_ciphersuites);
1174 sk_SSL_CIPHER_free(s->peer_ciphers);
1175
1176 /* Make the next call work :-) */
1177 if (s->session != NULL) {
1178 ssl_clear_bad_session(s);
1179 SSL_SESSION_free(s->session);
1180 }
1181 SSL_SESSION_free(s->psksession);
1182 OPENSSL_free(s->psksession_id);
1183
1184 clear_ciphers(s);
1185
1186 ssl_cert_free(s->cert);
1187 OPENSSL_free(s->shared_sigalgs);
1188 /* Free up if allocated */
1189
1190 OPENSSL_free(s->ext.hostname);
1191 SSL_CTX_free(s->session_ctx);
1192#ifndef OPENSSL_NO_EC
1193 OPENSSL_free(s->ext.ecpointformats);
1194 OPENSSL_free(s->ext.peer_ecpointformats);
1195 OPENSSL_free(s->ext.supportedgroups);
1196 OPENSSL_free(s->ext.peer_supportedgroups);
1197#endif /* OPENSSL_NO_EC */
1198 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
1199#ifndef OPENSSL_NO_OCSP
1200 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
1201#endif
1202#ifndef OPENSSL_NO_CT
1203 SCT_LIST_free(s->scts);
1204 OPENSSL_free(s->ext.scts);
1205#endif
1206 OPENSSL_free(s->ext.ocsp.resp);
1207 OPENSSL_free(s->ext.alpn);
1208 OPENSSL_free(s->ext.tls13_cookie);
1209 if (s->clienthello != NULL)
1210 OPENSSL_free(s->clienthello->pre_proc_exts);
1211 OPENSSL_free(s->clienthello);
1212 OPENSSL_free(s->pha_context);
1213 EVP_MD_CTX_free(s->pha_dgst);
1214
1215 sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free);
1216 sk_X509_NAME_pop_free(s->client_ca_names, X509_NAME_free);
1217
1218 sk_X509_pop_free(s->verified_chain, X509_free);
1219
1220 if (s->method != NULL)
1221 s->method->ssl_free(s);
1222
1223 RECORD_LAYER_release(&s->rlayer);
1224
1225 SSL_CTX_free(s->ctx);
1226
1227 ASYNC_WAIT_CTX_free(s->waitctx);
1228
1229#if !defined(OPENSSL_NO_NEXTPROTONEG)
1230 OPENSSL_free(s->ext.npn);
1231#endif
1232
1233#ifndef OPENSSL_NO_SRTP
1234 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
1235#endif
1236
1237 CRYPTO_THREAD_lock_free(s->lock);
1238
1239 OPENSSL_free(s);
1240}
1241
1242void SSL_set0_rbio(SSL *s, BIO *rbio)
1243{
1244 BIO_free_all(s->rbio);
1245 s->rbio = rbio;
1246}
1247
1248void SSL_set0_wbio(SSL *s, BIO *wbio)
1249{
1250 /*
1251 * If the output buffering BIO is still in place, remove it
1252 */
1253 if (s->bbio != NULL)
1254 s->wbio = BIO_pop(s->wbio);
1255
1256 BIO_free_all(s->wbio);
1257 s->wbio = wbio;
1258
1259 /* Re-attach |bbio| to the new |wbio|. */
1260 if (s->bbio != NULL)
1261 s->wbio = BIO_push(s->bbio, s->wbio);
1262}
1263
1264void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
1265{
1266 /*
1267 * For historical reasons, this function has many different cases in
1268 * ownership handling.
1269 */
1270
1271 /* If nothing has changed, do nothing */
1272 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
1273 return;
1274
1275 /*
1276 * If the two arguments are equal then one fewer reference is granted by the
1277 * caller than we want to take
1278 */
1279 if (rbio != NULL && rbio == wbio)
1280 BIO_up_ref(rbio);
1281
1282 /*
1283 * If only the wbio is changed only adopt one reference.
1284 */
1285 if (rbio == SSL_get_rbio(s)) {
1286 SSL_set0_wbio(s, wbio);
1287 return;
1288 }
1289 /*
1290 * There is an asymmetry here for historical reasons. If only the rbio is
1291 * changed AND the rbio and wbio were originally different, then we only
1292 * adopt one reference.
1293 */
1294 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
1295 SSL_set0_rbio(s, rbio);
1296 return;
1297 }
1298
1299 /* Otherwise, adopt both references. */
1300 SSL_set0_rbio(s, rbio);
1301 SSL_set0_wbio(s, wbio);
1302}
1303
1304BIO *SSL_get_rbio(const SSL *s)
1305{
1306 return s->rbio;
1307}
1308
1309BIO *SSL_get_wbio(const SSL *s)
1310{
1311 if (s->bbio != NULL) {
1312 /*
1313 * If |bbio| is active, the true caller-configured BIO is its
1314 * |next_bio|.
1315 */
1316 return BIO_next(s->bbio);
1317 }
1318 return s->wbio;
1319}
1320
1321int SSL_get_fd(const SSL *s)
1322{
1323 return SSL_get_rfd(s);
1324}
1325
1326int SSL_get_rfd(const SSL *s)
1327{
1328 int ret = -1;
1329 BIO *b, *r;
1330
1331 b = SSL_get_rbio(s);
1332 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1333 if (r != NULL)
1334 BIO_get_fd(r, &ret);
1335 return ret;
1336}
1337
1338int SSL_get_wfd(const SSL *s)
1339{
1340 int ret = -1;
1341 BIO *b, *r;
1342
1343 b = SSL_get_wbio(s);
1344 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1345 if (r != NULL)
1346 BIO_get_fd(r, &ret);
1347 return ret;
1348}
1349
1350#ifndef OPENSSL_NO_SOCK
1351int SSL_set_fd(SSL *s, int fd)
1352{
1353 int ret = 0;
1354 BIO *bio = NULL;
1355
1356 bio = BIO_new(BIO_s_socket());
1357
1358 if (bio == NULL) {
1359 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
1360 goto err;
1361 }
1362 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1363 SSL_set_bio(s, bio, bio);
1364 ret = 1;
1365 err:
1366 return ret;
1367}
1368
1369int SSL_set_wfd(SSL *s, int fd)
1370{
1371 BIO *rbio = SSL_get_rbio(s);
1372
1373 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
1374 || (int)BIO_get_fd(rbio, NULL) != fd) {
1375 BIO *bio = BIO_new(BIO_s_socket());
1376
1377 if (bio == NULL) {
1378 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB);
1379 return 0;
1380 }
1381 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1382 SSL_set0_wbio(s, bio);
1383 } else {
1384 BIO_up_ref(rbio);
1385 SSL_set0_wbio(s, rbio);
1386 }
1387 return 1;
1388}
1389
1390int SSL_set_rfd(SSL *s, int fd)
1391{
1392 BIO *wbio = SSL_get_wbio(s);
1393
1394 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
1395 || ((int)BIO_get_fd(wbio, NULL) != fd)) {
1396 BIO *bio = BIO_new(BIO_s_socket());
1397
1398 if (bio == NULL) {
1399 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB);
1400 return 0;
1401 }
1402 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1403 SSL_set0_rbio(s, bio);
1404 } else {
1405 BIO_up_ref(wbio);
1406 SSL_set0_rbio(s, wbio);
1407 }
1408
1409 return 1;
1410}
1411#endif
1412
1413/* return length of latest Finished message we sent, copy to 'buf' */
1414size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
1415{
1416 size_t ret = 0;
1417
1418 if (s->s3 != NULL) {
1419 ret = s->s3->tmp.finish_md_len;
1420 if (count > ret)
1421 count = ret;
1422 memcpy(buf, s->s3->tmp.finish_md, count);
1423 }
1424 return ret;
1425}
1426
1427/* return length of latest Finished message we expected, copy to 'buf' */
1428size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
1429{
1430 size_t ret = 0;
1431
1432 if (s->s3 != NULL) {
1433 ret = s->s3->tmp.peer_finish_md_len;
1434 if (count > ret)
1435 count = ret;
1436 memcpy(buf, s->s3->tmp.peer_finish_md, count);
1437 }
1438 return ret;
1439}
1440
1441int SSL_get_verify_mode(const SSL *s)
1442{
1443 return s->verify_mode;
1444}
1445
1446int SSL_get_verify_depth(const SSL *s)
1447{
1448 return X509_VERIFY_PARAM_get_depth(s->param);
1449}
1450
1451int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
1452 return s->verify_callback;
1453}
1454
1455int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
1456{
1457 return ctx->verify_mode;
1458}
1459
1460int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
1461{
1462 return X509_VERIFY_PARAM_get_depth(ctx->param);
1463}
1464
1465int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
1466 return ctx->default_verify_callback;
1467}
1468
1469void SSL_set_verify(SSL *s, int mode,
1470 int (*callback) (int ok, X509_STORE_CTX *ctx))
1471{
1472 s->verify_mode = mode;
1473 if (callback != NULL)
1474 s->verify_callback = callback;
1475}
1476
1477void SSL_set_verify_depth(SSL *s, int depth)
1478{
1479 X509_VERIFY_PARAM_set_depth(s->param, depth);
1480}
1481
1482void SSL_set_read_ahead(SSL *s, int yes)
1483{
1484 RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
1485}
1486
1487int SSL_get_read_ahead(const SSL *s)
1488{
1489 return RECORD_LAYER_get_read_ahead(&s->rlayer);
1490}
1491
1492int SSL_pending(const SSL *s)
1493{
1494 size_t pending = s->method->ssl_pending(s);
1495
1496 /*
1497 * SSL_pending cannot work properly if read-ahead is enabled
1498 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
1499 * impossible to fix since SSL_pending cannot report errors that may be
1500 * observed while scanning the new data. (Note that SSL_pending() is
1501 * often used as a boolean value, so we'd better not return -1.)
1502 *
1503 * SSL_pending also cannot work properly if the value >INT_MAX. In that case
1504 * we just return INT_MAX.
1505 */
1506 return pending < INT_MAX ? (int)pending : INT_MAX;
1507}
1508
1509int SSL_has_pending(const SSL *s)
1510{
1511 /*
1512 * Similar to SSL_pending() but returns a 1 to indicate that we have
1513 * unprocessed data available or 0 otherwise (as opposed to the number of
1514 * bytes available). Unlike SSL_pending() this will take into account
1515 * read_ahead data. A 1 return simply indicates that we have unprocessed
1516 * data. That data may not result in any application data, or we may fail
1517 * to parse the records for some reason.
1518 */
1519 if (RECORD_LAYER_processed_read_pending(&s->rlayer))
1520 return 1;
1521
1522 return RECORD_LAYER_read_pending(&s->rlayer);
1523}
1524
1525X509 *SSL_get_peer_certificate(const SSL *s)
1526{
1527 X509 *r;
1528
1529 if ((s == NULL) || (s->session == NULL))
1530 r = NULL;
1531 else
1532 r = s->session->peer;
1533
1534 if (r == NULL)
1535 return r;
1536
1537 X509_up_ref(r);
1538
1539 return r;
1540}
1541
1542STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
1543{
1544 STACK_OF(X509) *r;
1545
1546 if ((s == NULL) || (s->session == NULL))
1547 r = NULL;
1548 else
1549 r = s->session->peer_chain;
1550
1551 /*
1552 * If we are a client, cert_chain includes the peer's own certificate; if
1553 * we are a server, it does not.
1554 */
1555
1556 return r;
1557}
1558
1559/*
1560 * Now in theory, since the calling process own 't' it should be safe to
1561 * modify. We need to be able to read f without being hassled
1562 */
1563int SSL_copy_session_id(SSL *t, const SSL *f)
1564{
1565 int i;
1566 /* Do we need to to SSL locking? */
1567 if (!SSL_set_session(t, SSL_get_session(f))) {
1568 return 0;
1569 }
1570
1571 /*
1572 * what if we are setup for one protocol version but want to talk another
1573 */
1574 if (t->method != f->method) {
1575 t->method->ssl_free(t);
1576 t->method = f->method;
1577 if (t->method->ssl_new(t) == 0)
1578 return 0;
1579 }
1580
1581 CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock);
1582 ssl_cert_free(t->cert);
1583 t->cert = f->cert;
1584 if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
1585 return 0;
1586 }
1587
1588 return 1;
1589}
1590
1591/* Fix this so it checks all the valid key/cert options */
1592int SSL_CTX_check_private_key(const SSL_CTX *ctx)
1593{
1594 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
1595 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1596 return 0;
1597 }
1598 if (ctx->cert->key->privatekey == NULL) {
1599 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1600 return 0;
1601 }
1602 return X509_check_private_key
1603 (ctx->cert->key->x509, ctx->cert->key->privatekey);
1604}
1605
1606/* Fix this function so that it takes an optional type parameter */
1607int SSL_check_private_key(const SSL *ssl)
1608{
1609 if (ssl == NULL) {
1610 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
1611 return 0;
1612 }
1613 if (ssl->cert->key->x509 == NULL) {
1614 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1615 return 0;
1616 }
1617 if (ssl->cert->key->privatekey == NULL) {
1618 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1619 return 0;
1620 }
1621 return X509_check_private_key(ssl->cert->key->x509,
1622 ssl->cert->key->privatekey);
1623}
1624
1625int SSL_waiting_for_async(SSL *s)
1626{
1627 if (s->job)
1628 return 1;
1629
1630 return 0;
1631}
1632
1633int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
1634{
1635 ASYNC_WAIT_CTX *ctx = s->waitctx;
1636
1637 if (ctx == NULL)
1638 return 0;
1639 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
1640}
1641
1642int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
1643 OSSL_ASYNC_FD *delfd, size_t *numdelfds)
1644{
1645 ASYNC_WAIT_CTX *ctx = s->waitctx;
1646
1647 if (ctx == NULL)
1648 return 0;
1649 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
1650 numdelfds);
1651}
1652
1653int SSL_accept(SSL *s)
1654{
1655 if (s->handshake_func == NULL) {
1656 /* Not properly initialized yet */
1657 SSL_set_accept_state(s);
1658 }
1659
1660 return SSL_do_handshake(s);
1661}
1662
1663int SSL_connect(SSL *s)
1664{
1665 if (s->handshake_func == NULL) {
1666 /* Not properly initialized yet */
1667 SSL_set_connect_state(s);
1668 }
1669
1670 return SSL_do_handshake(s);
1671}
1672
1673long SSL_get_default_timeout(const SSL *s)
1674{
1675 return s->method->get_timeout();
1676}
1677
1678static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
1679 int (*func) (void *))
1680{
1681 int ret;
1682 if (s->waitctx == NULL) {
1683 s->waitctx = ASYNC_WAIT_CTX_new();
1684 if (s->waitctx == NULL)
1685 return -1;
1686 }
1687 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args,
1688 sizeof(struct ssl_async_args))) {
1689 case ASYNC_ERR:
1690 s->rwstate = SSL_NOTHING;
1691 SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC);
1692 return -1;
1693 case ASYNC_PAUSE:
1694 s->rwstate = SSL_ASYNC_PAUSED;
1695 return -1;
1696 case ASYNC_NO_JOBS:
1697 s->rwstate = SSL_ASYNC_NO_JOBS;
1698 return -1;
1699 case ASYNC_FINISH:
1700 s->job = NULL;
1701 return ret;
1702 default:
1703 s->rwstate = SSL_NOTHING;
1704 SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR);
1705 /* Shouldn't happen */
1706 return -1;
1707 }
1708}
1709
1710static int ssl_io_intern(void *vargs)
1711{
1712 struct ssl_async_args *args;
1713 SSL *s;
1714 void *buf;
1715 size_t num;
1716
1717 args = (struct ssl_async_args *)vargs;
1718 s = args->s;
1719 buf = args->buf;
1720 num = args->num;
1721 switch (args->type) {
1722 case READFUNC:
1723 return args->f.func_read(s, buf, num, &s->asyncrw);
1724 case WRITEFUNC:
1725 return args->f.func_write(s, buf, num, &s->asyncrw);
1726 case OTHERFUNC:
1727 return args->f.func_other(s);
1728 }
1729 return -1;
1730}
1731
1732int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1733{
1734 if (s->handshake_func == NULL) {
1735 SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED);
1736 return -1;
1737 }
1738
1739 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1740 s->rwstate = SSL_NOTHING;
1741 return 0;
1742 }
1743
1744 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1745 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
1746 SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1747 return 0;
1748 }
1749 /*
1750 * If we are a client and haven't received the ServerHello etc then we
1751 * better do that
1752 */
1753 ossl_statem_check_finish_init(s, 0);
1754
1755 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1756 struct ssl_async_args args;
1757 int ret;
1758
1759 args.s = s;
1760 args.buf = buf;
1761 args.num = num;
1762 args.type = READFUNC;
1763 args.f.func_read = s->method->ssl_read;
1764
1765 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1766 *readbytes = s->asyncrw;
1767 return ret;
1768 } else {
1769 return s->method->ssl_read(s, buf, num, readbytes);
1770 }
1771}
1772
1773int SSL_read(SSL *s, void *buf, int num)
1774{
1775 int ret;
1776 size_t readbytes;
1777
1778 if (num < 0) {
1779 SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH);
1780 return -1;
1781 }
1782
1783 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
1784
1785 /*
1786 * The cast is safe here because ret should be <= INT_MAX because num is
1787 * <= INT_MAX
1788 */
1789 if (ret > 0)
1790 ret = (int)readbytes;
1791
1792 return ret;
1793}
1794
1795int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1796{
1797 int ret = ssl_read_internal(s, buf, num, readbytes);
1798
1799 if (ret < 0)
1800 ret = 0;
1801 return ret;
1802}
1803
1804int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
1805{
1806 int ret;
1807
1808 if (!s->server) {
1809 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1810 return SSL_READ_EARLY_DATA_ERROR;
1811 }
1812
1813 switch (s->early_data_state) {
1814 case SSL_EARLY_DATA_NONE:
1815 if (!SSL_in_before(s)) {
1816 SSLerr(SSL_F_SSL_READ_EARLY_DATA,
1817 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1818 return SSL_READ_EARLY_DATA_ERROR;
1819 }
1820 /* fall through */
1821
1822 case SSL_EARLY_DATA_ACCEPT_RETRY:
1823 s->early_data_state = SSL_EARLY_DATA_ACCEPTING;
1824 ret = SSL_accept(s);
1825 if (ret <= 0) {
1826 /* NBIO or error */
1827 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
1828 return SSL_READ_EARLY_DATA_ERROR;
1829 }
1830 /* fall through */
1831
1832 case SSL_EARLY_DATA_READ_RETRY:
1833 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
1834 s->early_data_state = SSL_EARLY_DATA_READING;
1835 ret = SSL_read_ex(s, buf, num, readbytes);
1836 /*
1837 * State machine will update early_data_state to
1838 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData
1839 * message
1840 */
1841 if (ret > 0 || (ret <= 0 && s->early_data_state
1842 != SSL_EARLY_DATA_FINISHED_READING)) {
1843 s->early_data_state = SSL_EARLY_DATA_READ_RETRY;
1844 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
1845 : SSL_READ_EARLY_DATA_ERROR;
1846 }
1847 } else {
1848 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
1849 }
1850 *readbytes = 0;
1851 return SSL_READ_EARLY_DATA_FINISH;
1852
1853 default:
1854 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1855 return SSL_READ_EARLY_DATA_ERROR;
1856 }
1857}
1858
1859int SSL_get_early_data_status(const SSL *s)
1860{
1861 return s->ext.early_data;
1862}
1863
1864static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1865{
1866 if (s->handshake_func == NULL) {
1867 SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED);
1868 return -1;
1869 }
1870
1871 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1872 return 0;
1873 }
1874 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1875 struct ssl_async_args args;
1876 int ret;
1877
1878 args.s = s;
1879 args.buf = buf;
1880 args.num = num;
1881 args.type = READFUNC;
1882 args.f.func_read = s->method->ssl_peek;
1883
1884 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1885 *readbytes = s->asyncrw;
1886 return ret;
1887 } else {
1888 return s->method->ssl_peek(s, buf, num, readbytes);
1889 }
1890}
1891
1892int SSL_peek(SSL *s, void *buf, int num)
1893{
1894 int ret;
1895 size_t readbytes;
1896
1897 if (num < 0) {
1898 SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH);
1899 return -1;
1900 }
1901
1902 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
1903
1904 /*
1905 * The cast is safe here because ret should be <= INT_MAX because num is
1906 * <= INT_MAX
1907 */
1908 if (ret > 0)
1909 ret = (int)readbytes;
1910
1911 return ret;
1912}
1913
1914
1915int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1916{
1917 int ret = ssl_peek_internal(s, buf, num, readbytes);
1918
1919 if (ret < 0)
1920 ret = 0;
1921 return ret;
1922}
1923
1924int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
1925{
1926 if (s->handshake_func == NULL) {
1927 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED);
1928 return -1;
1929 }
1930
1931 if (s->shutdown & SSL_SENT_SHUTDOWN) {
1932 s->rwstate = SSL_NOTHING;
1933 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN);
1934 return -1;
1935 }
1936
1937 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1938 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY
1939 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
1940 SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1941 return 0;
1942 }
1943 /* If we are a client and haven't sent the Finished we better do that */
1944 ossl_statem_check_finish_init(s, 1);
1945
1946 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1947 int ret;
1948 struct ssl_async_args args;
1949
1950 args.s = s;
1951 args.buf = (void *)buf;
1952 args.num = num;
1953 args.type = WRITEFUNC;
1954 args.f.func_write = s->method->ssl_write;
1955
1956 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1957 *written = s->asyncrw;
1958 return ret;
1959 } else {
1960 return s->method->ssl_write(s, buf, num, written);
1961 }
1962}
1963
1964int SSL_write(SSL *s, const void *buf, int num)
1965{
1966 int ret;
1967 size_t written;
1968
1969 if (num < 0) {
1970 SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH);
1971 return -1;
1972 }
1973
1974 ret = ssl_write_internal(s, buf, (size_t)num, &written);
1975
1976 /*
1977 * The cast is safe here because ret should be <= INT_MAX because num is
1978 * <= INT_MAX
1979 */
1980 if (ret > 0)
1981 ret = (int)written;
1982
1983 return ret;
1984}
1985
1986int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
1987{
1988 int ret = ssl_write_internal(s, buf, num, written);
1989
1990 if (ret < 0)
1991 ret = 0;
1992 return ret;
1993}
1994
1995int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
1996{
1997 int ret, early_data_state;
1998 size_t writtmp;
1999 uint32_t partialwrite;
2000
2001 switch (s->early_data_state) {
2002 case SSL_EARLY_DATA_NONE:
2003 if (s->server
2004 || !SSL_in_before(s)
2005 || ((s->session == NULL || s->session->ext.max_early_data == 0)
2006 && (s->psk_use_session_cb == NULL))) {
2007 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA,
2008 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2009 return 0;
2010 }
2011 /* fall through */
2012
2013 case SSL_EARLY_DATA_CONNECT_RETRY:
2014 s->early_data_state = SSL_EARLY_DATA_CONNECTING;
2015 ret = SSL_connect(s);
2016 if (ret <= 0) {
2017 /* NBIO or error */
2018 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
2019 return 0;
2020 }
2021 /* fall through */
2022
2023 case SSL_EARLY_DATA_WRITE_RETRY:
2024 s->early_data_state = SSL_EARLY_DATA_WRITING;
2025 /*
2026 * We disable partial write for early data because we don't keep track
2027 * of how many bytes we've written between the SSL_write_ex() call and
2028 * the flush if the flush needs to be retried)
2029 */
2030 partialwrite = s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE;
2031 s->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE;
2032 ret = SSL_write_ex(s, buf, num, &writtmp);
2033 s->mode |= partialwrite;
2034 if (!ret) {
2035 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2036 return ret;
2037 }
2038 s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH;
2039 /* fall through */
2040
2041 case SSL_EARLY_DATA_WRITE_FLUSH:
2042 /* The buffering BIO is still in place so we need to flush it */
2043 if (statem_flush(s) != 1)
2044 return 0;
2045 *written = num;
2046 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2047 return 1;
2048
2049 case SSL_EARLY_DATA_FINISHED_READING:
2050 case SSL_EARLY_DATA_READ_RETRY:
2051 early_data_state = s->early_data_state;
2052 /* We are a server writing to an unauthenticated client */
2053 s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING;
2054 ret = SSL_write_ex(s, buf, num, written);
2055 /* The buffering BIO is still in place */
2056 if (ret)
2057 (void)BIO_flush(s->wbio);
2058 s->early_data_state = early_data_state;
2059 return ret;
2060
2061 default:
2062 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2063 return 0;
2064 }
2065}
2066
2067int SSL_shutdown(SSL *s)
2068{
2069 /*
2070 * Note that this function behaves differently from what one might
2071 * expect. Return values are 0 for no success (yet), 1 for success; but
2072 * calling it once is usually not enough, even if blocking I/O is used
2073 * (see ssl3_shutdown).
2074 */
2075
2076 if (s->handshake_func == NULL) {
2077 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
2078 return -1;
2079 }
2080
2081 if (!SSL_in_init(s)) {
2082 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2083 struct ssl_async_args args;
2084
2085 args.s = s;
2086 args.type = OTHERFUNC;
2087 args.f.func_other = s->method->ssl_shutdown;
2088
2089 return ssl_start_async_job(s, &args, ssl_io_intern);
2090 } else {
2091 return s->method->ssl_shutdown(s);
2092 }
2093 } else {
2094 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT);
2095 return -1;
2096 }
2097}
2098
2099int SSL_key_update(SSL *s, int updatetype)
2100{
2101 /*
2102 * TODO(TLS1.3): How will applications know whether TLSv1.3 has been
2103 * negotiated, and that it is appropriate to call SSL_key_update() instead
2104 * of SSL_renegotiate().
2105 */
2106 if (!SSL_IS_TLS13(s)) {
2107 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION);
2108 return 0;
2109 }
2110
2111 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
2112 && updatetype != SSL_KEY_UPDATE_REQUESTED) {
2113 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE);
2114 return 0;
2115 }
2116
2117 if (!SSL_is_init_finished(s)) {
2118 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT);
2119 return 0;
2120 }
2121
2122 if (RECORD_LAYER_write_pending(&s->rlayer)) {
2123 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_BAD_WRITE_RETRY);
2124 return 0;
2125 }
2126
2127 ossl_statem_set_in_init(s, 1);
2128 s->key_update = updatetype;
2129 return 1;
2130}
2131
2132int SSL_get_key_update_type(const SSL *s)
2133{
2134 return s->key_update;
2135}
2136
2137int SSL_renegotiate(SSL *s)
2138{
2139 if (SSL_IS_TLS13(s)) {
2140 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION);
2141 return 0;
2142 }
2143
2144 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2145 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION);
2146 return 0;
2147 }
2148
2149 s->renegotiate = 1;
2150 s->new_session = 1;
2151
2152 return s->method->ssl_renegotiate(s);
2153}
2154
2155int SSL_renegotiate_abbreviated(SSL *s)
2156{
2157 if (SSL_IS_TLS13(s)) {
2158 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION);
2159 return 0;
2160 }
2161
2162 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2163 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION);
2164 return 0;
2165 }
2166
2167 s->renegotiate = 1;
2168 s->new_session = 0;
2169
2170 return s->method->ssl_renegotiate(s);
2171}
2172
2173int SSL_renegotiate_pending(const SSL *s)
2174{
2175 /*
2176 * becomes true when negotiation is requested; false again once a
2177 * handshake has finished
2178 */
2179 return (s->renegotiate != 0);
2180}
2181
2182long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
2183{
2184 long l;
2185
2186 switch (cmd) {
2187 case SSL_CTRL_GET_READ_AHEAD:
2188 return RECORD_LAYER_get_read_ahead(&s->rlayer);
2189 case SSL_CTRL_SET_READ_AHEAD:
2190 l = RECORD_LAYER_get_read_ahead(&s->rlayer);
2191 RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
2192 return l;
2193
2194 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2195 s->msg_callback_arg = parg;
2196 return 1;
2197
2198 case SSL_CTRL_MODE:
2199 return (s->mode |= larg);
2200 case SSL_CTRL_CLEAR_MODE:
2201 return (s->mode &= ~larg);
2202 case SSL_CTRL_GET_MAX_CERT_LIST:
2203 return (long)s->max_cert_list;
2204 case SSL_CTRL_SET_MAX_CERT_LIST:
2205 if (larg < 0)
2206 return 0;
2207 l = (long)s->max_cert_list;
2208 s->max_cert_list = (size_t)larg;
2209 return l;
2210 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2211 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2212 return 0;
2213 s->max_send_fragment = larg;
2214 if (s->max_send_fragment < s->split_send_fragment)
2215 s->split_send_fragment = s->max_send_fragment;
2216 return 1;
2217 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2218 if ((size_t)larg > s->max_send_fragment || larg == 0)
2219 return 0;
2220 s->split_send_fragment = larg;
2221 return 1;
2222 case SSL_CTRL_SET_MAX_PIPELINES:
2223 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2224 return 0;
2225 s->max_pipelines = larg;
2226 if (larg > 1)
2227 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
2228 return 1;
2229 case SSL_CTRL_GET_RI_SUPPORT:
2230 if (s->s3)
2231 return s->s3->send_connection_binding;
2232 else
2233 return 0;
2234 case SSL_CTRL_CERT_FLAGS:
2235 return (s->cert->cert_flags |= larg);
2236 case SSL_CTRL_CLEAR_CERT_FLAGS:
2237 return (s->cert->cert_flags &= ~larg);
2238
2239 case SSL_CTRL_GET_RAW_CIPHERLIST:
2240 if (parg) {
2241 if (s->s3->tmp.ciphers_raw == NULL)
2242 return 0;
2243 *(unsigned char **)parg = s->s3->tmp.ciphers_raw;
2244 return (int)s->s3->tmp.ciphers_rawlen;
2245 } else {
2246 return TLS_CIPHER_LEN;
2247 }
2248 case SSL_CTRL_GET_EXTMS_SUPPORT:
2249 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
2250 return -1;
2251 if (s->session->flags & SSL_SESS_FLAG_EXTMS)
2252 return 1;
2253 else
2254 return 0;
2255 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2256 return ssl_check_allowed_versions(larg, s->max_proto_version)
2257 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2258 &s->min_proto_version);
2259 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2260 return s->min_proto_version;
2261 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2262 return ssl_check_allowed_versions(s->min_proto_version, larg)
2263 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2264 &s->max_proto_version);
2265 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2266 return s->max_proto_version;
2267 default:
2268 return s->method->ssl_ctrl(s, cmd, larg, parg);
2269 }
2270}
2271
2272long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
2273{
2274 switch (cmd) {
2275 case SSL_CTRL_SET_MSG_CALLBACK:
2276 s->msg_callback = (void (*)
2277 (int write_p, int version, int content_type,
2278 const void *buf, size_t len, SSL *ssl,
2279 void *arg))(fp);
2280 return 1;
2281
2282 default:
2283 return s->method->ssl_callback_ctrl(s, cmd, fp);
2284 }
2285}
2286
2287LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
2288{
2289 return ctx->sessions;
2290}
2291
2292long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
2293{
2294 long l;
2295 /* For some cases with ctx == NULL perform syntax checks */
2296 if (ctx == NULL) {
2297 switch (cmd) {
2298#ifndef OPENSSL_NO_EC
2299 case SSL_CTRL_SET_GROUPS_LIST:
2300 return tls1_set_groups_list(NULL, NULL, parg);
2301#endif
2302 case SSL_CTRL_SET_SIGALGS_LIST:
2303 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
2304 return tls1_set_sigalgs_list(NULL, parg, 0);
2305 default:
2306 return 0;
2307 }
2308 }
2309
2310 switch (cmd) {
2311 case SSL_CTRL_GET_READ_AHEAD:
2312 return ctx->read_ahead;
2313 case SSL_CTRL_SET_READ_AHEAD:
2314 l = ctx->read_ahead;
2315 ctx->read_ahead = larg;
2316 return l;
2317
2318 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2319 ctx->msg_callback_arg = parg;
2320 return 1;
2321
2322 case SSL_CTRL_GET_MAX_CERT_LIST:
2323 return (long)ctx->max_cert_list;
2324 case SSL_CTRL_SET_MAX_CERT_LIST:
2325 if (larg < 0)
2326 return 0;
2327 l = (long)ctx->max_cert_list;
2328 ctx->max_cert_list = (size_t)larg;
2329 return l;
2330
2331 case SSL_CTRL_SET_SESS_CACHE_SIZE:
2332 if (larg < 0)
2333 return 0;
2334 l = (long)ctx->session_cache_size;
2335 ctx->session_cache_size = (size_t)larg;
2336 return l;
2337 case SSL_CTRL_GET_SESS_CACHE_SIZE:
2338 return (long)ctx->session_cache_size;
2339 case SSL_CTRL_SET_SESS_CACHE_MODE:
2340 l = ctx->session_cache_mode;
2341 ctx->session_cache_mode = larg;
2342 return l;
2343 case SSL_CTRL_GET_SESS_CACHE_MODE:
2344 return ctx->session_cache_mode;
2345
2346 case SSL_CTRL_SESS_NUMBER:
2347 return lh_SSL_SESSION_num_items(ctx->sessions);
2348 case SSL_CTRL_SESS_CONNECT:
2349 return tsan_load(&ctx->stats.sess_connect);
2350 case SSL_CTRL_SESS_CONNECT_GOOD:
2351 return tsan_load(&ctx->stats.sess_connect_good);
2352 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
2353 return tsan_load(&ctx->stats.sess_connect_renegotiate);
2354 case SSL_CTRL_SESS_ACCEPT:
2355 return tsan_load(&ctx->stats.sess_accept);
2356 case SSL_CTRL_SESS_ACCEPT_GOOD:
2357 return tsan_load(&ctx->stats.sess_accept_good);
2358 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
2359 return tsan_load(&ctx->stats.sess_accept_renegotiate);
2360 case SSL_CTRL_SESS_HIT:
2361 return tsan_load(&ctx->stats.sess_hit);
2362 case SSL_CTRL_SESS_CB_HIT:
2363 return tsan_load(&ctx->stats.sess_cb_hit);
2364 case SSL_CTRL_SESS_MISSES:
2365 return tsan_load(&ctx->stats.sess_miss);
2366 case SSL_CTRL_SESS_TIMEOUTS:
2367 return tsan_load(&ctx->stats.sess_timeout);
2368 case SSL_CTRL_SESS_CACHE_FULL:
2369 return tsan_load(&ctx->stats.sess_cache_full);
2370 case SSL_CTRL_MODE:
2371 return (ctx->mode |= larg);
2372 case SSL_CTRL_CLEAR_MODE:
2373 return (ctx->mode &= ~larg);
2374 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2375 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2376 return 0;
2377 ctx->max_send_fragment = larg;
2378 if (ctx->max_send_fragment < ctx->split_send_fragment)
2379 ctx->split_send_fragment = ctx->max_send_fragment;
2380 return 1;
2381 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2382 if ((size_t)larg > ctx->max_send_fragment || larg == 0)
2383 return 0;
2384 ctx->split_send_fragment = larg;
2385 return 1;
2386 case SSL_CTRL_SET_MAX_PIPELINES:
2387 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2388 return 0;
2389 ctx->max_pipelines = larg;
2390 return 1;
2391 case SSL_CTRL_CERT_FLAGS:
2392 return (ctx->cert->cert_flags |= larg);
2393 case SSL_CTRL_CLEAR_CERT_FLAGS:
2394 return (ctx->cert->cert_flags &= ~larg);
2395 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2396 return ssl_check_allowed_versions(larg, ctx->max_proto_version)
2397 && ssl_set_version_bound(ctx->method->version, (int)larg,
2398 &ctx->min_proto_version);
2399 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2400 return ctx->min_proto_version;
2401 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2402 return ssl_check_allowed_versions(ctx->min_proto_version, larg)
2403 && ssl_set_version_bound(ctx->method->version, (int)larg,
2404 &ctx->max_proto_version);
2405 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2406 return ctx->max_proto_version;
2407 default:
2408 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg);
2409 }
2410}
2411
2412long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
2413{
2414 switch (cmd) {
2415 case SSL_CTRL_SET_MSG_CALLBACK:
2416 ctx->msg_callback = (void (*)
2417 (int write_p, int version, int content_type,
2418 const void *buf, size_t len, SSL *ssl,
2419 void *arg))(fp);
2420 return 1;
2421
2422 default:
2423 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp);
2424 }
2425}
2426
2427int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
2428{
2429 if (a->id > b->id)
2430 return 1;
2431 if (a->id < b->id)
2432 return -1;
2433 return 0;
2434}
2435
2436int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
2437 const SSL_CIPHER *const *bp)
2438{
2439 if ((*ap)->id > (*bp)->id)
2440 return 1;
2441 if ((*ap)->id < (*bp)->id)
2442 return -1;
2443 return 0;
2444}
2445
2446/** return a STACK of the ciphers available for the SSL and in order of
2447 * preference */
2448STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
2449{
2450 if (s != NULL) {
2451 if (s->cipher_list != NULL) {
2452 return s->cipher_list;
2453 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
2454 return s->ctx->cipher_list;
2455 }
2456 }
2457 return NULL;
2458}
2459
2460STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
2461{
2462 if ((s == NULL) || !s->server)
2463 return NULL;
2464 return s->peer_ciphers;
2465}
2466
2467STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
2468{
2469 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
2470 int i;
2471
2472 ciphers = SSL_get_ciphers(s);
2473 if (!ciphers)
2474 return NULL;
2475 if (!ssl_set_client_disabled(s))
2476 return NULL;
2477 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
2478 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
2479 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) {
2480 if (!sk)
2481 sk = sk_SSL_CIPHER_new_null();
2482 if (!sk)
2483 return NULL;
2484 if (!sk_SSL_CIPHER_push(sk, c)) {
2485 sk_SSL_CIPHER_free(sk);
2486 return NULL;
2487 }
2488 }
2489 }
2490 return sk;
2491}
2492
2493/** return a STACK of the ciphers available for the SSL and in order of
2494 * algorithm id */
2495STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
2496{
2497 if (s != NULL) {
2498 if (s->cipher_list_by_id != NULL) {
2499 return s->cipher_list_by_id;
2500 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
2501 return s->ctx->cipher_list_by_id;
2502 }
2503 }
2504 return NULL;
2505}
2506
2507/** The old interface to get the same thing as SSL_get_ciphers() */
2508const char *SSL_get_cipher_list(const SSL *s, int n)
2509{
2510 const SSL_CIPHER *c;
2511 STACK_OF(SSL_CIPHER) *sk;
2512
2513 if (s == NULL)
2514 return NULL;
2515 sk = SSL_get_ciphers(s);
2516 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
2517 return NULL;
2518 c = sk_SSL_CIPHER_value(sk, n);
2519 if (c == NULL)
2520 return NULL;
2521 return c->name;
2522}
2523
2524/** return a STACK of the ciphers available for the SSL_CTX and in order of
2525 * preference */
2526STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
2527{
2528 if (ctx != NULL)
2529 return ctx->cipher_list;
2530 return NULL;
2531}
2532
2533/*
2534 * Distinguish between ciphers controlled by set_ciphersuite() and
2535 * set_cipher_list() when counting.
2536 */
2537static int cipher_list_tls12_num(STACK_OF(SSL_CIPHER) *sk)
2538{
2539 int i, num = 0;
2540 const SSL_CIPHER *c;
2541
2542 if (sk == NULL)
2543 return 0;
2544 for (i = 0; i < sk_SSL_CIPHER_num(sk); ++i) {
2545 c = sk_SSL_CIPHER_value(sk, i);
2546 if (c->min_tls >= TLS1_3_VERSION)
2547 continue;
2548 num++;
2549 }
2550 return num;
2551}
2552
2553/** specify the ciphers to be used by default by the SSL_CTX */
2554int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
2555{
2556 STACK_OF(SSL_CIPHER) *sk;
2557
2558 sk = ssl_create_cipher_list(ctx->method, ctx->tls13_ciphersuites,
2559 &ctx->cipher_list, &ctx->cipher_list_by_id, str,
2560 ctx->cert);
2561 /*
2562 * ssl_create_cipher_list may return an empty stack if it was unable to
2563 * find a cipher matching the given rule string (for example if the rule
2564 * string specifies a cipher which has been disabled). This is not an
2565 * error as far as ssl_create_cipher_list is concerned, and hence
2566 * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
2567 */
2568 if (sk == NULL)
2569 return 0;
2570 else if (cipher_list_tls12_num(sk) == 0) {
2571 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2572 return 0;
2573 }
2574 return 1;
2575}
2576
2577/** specify the ciphers to be used by the SSL */
2578int SSL_set_cipher_list(SSL *s, const char *str)
2579{
2580 STACK_OF(SSL_CIPHER) *sk;
2581
2582 sk = ssl_create_cipher_list(s->ctx->method, s->tls13_ciphersuites,
2583 &s->cipher_list, &s->cipher_list_by_id, str,
2584 s->cert);
2585 /* see comment in SSL_CTX_set_cipher_list */
2586 if (sk == NULL)
2587 return 0;
2588 else if (cipher_list_tls12_num(sk) == 0) {
2589 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2590 return 0;
2591 }
2592 return 1;
2593}
2594
2595char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size)
2596{
2597 char *p;
2598 STACK_OF(SSL_CIPHER) *clntsk, *srvrsk;
2599 const SSL_CIPHER *c;
2600 int i;
2601
2602 if (!s->server
2603 || s->peer_ciphers == NULL
2604 || size < 2)
2605 return NULL;
2606
2607 p = buf;
2608 clntsk = s->peer_ciphers;
2609 srvrsk = SSL_get_ciphers(s);
2610 if (clntsk == NULL || srvrsk == NULL)
2611 return NULL;
2612
2613 if (sk_SSL_CIPHER_num(clntsk) == 0 || sk_SSL_CIPHER_num(srvrsk) == 0)
2614 return NULL;
2615
2616 for (i = 0; i < sk_SSL_CIPHER_num(clntsk); i++) {
2617 int n;
2618
2619 c = sk_SSL_CIPHER_value(clntsk, i);
2620 if (sk_SSL_CIPHER_find(srvrsk, c) < 0)
2621 continue;
2622
2623 n = strlen(c->name);
2624 if (n + 1 > size) {
2625 if (p != buf)
2626 --p;
2627 *p = '\0';
2628 return buf;
2629 }
2630 strcpy(p, c->name);
2631 p += n;
2632 *(p++) = ':';
2633 size -= n + 1;
2634 }
2635 p[-1] = '\0';
2636 return buf;
2637}
2638
2639/**
2640 * Return the requested servername (SNI) value. Note that the behaviour varies
2641 * depending on:
2642 * - whether this is called by the client or the server,
2643 * - if we are before or during/after the handshake,
2644 * - if a resumption or normal handshake is being attempted/has occurred
2645 * - whether we have negotiated TLSv1.2 (or below) or TLSv1.3
2646 *
2647 * Note that only the host_name type is defined (RFC 3546).
2648 */
2649const char *SSL_get_servername(const SSL *s, const int type)
2650{
2651 /*
2652 * If we don't know if we are the client or the server yet then we assume
2653 * client.
2654 */
2655 int server = s->handshake_func == NULL ? 0 : s->server;
2656 if (type != TLSEXT_NAMETYPE_host_name)
2657 return NULL;
2658
2659 if (server) {
2660 /**
2661 * Server side
2662 * In TLSv1.3 on the server SNI is not associated with the session
2663 * but in TLSv1.2 or below it is.
2664 *
2665 * Before the handshake:
2666 * - return NULL
2667 *
2668 * During/after the handshake (TLSv1.2 or below resumption occurred):
2669 * - If a servername was accepted by the server in the original
2670 * handshake then it will return that servername, or NULL otherwise.
2671 *
2672 * During/after the handshake (TLSv1.2 or below resumption did not occur):
2673 * - The function will return the servername requested by the client in
2674 * this handshake or NULL if none was requested.
2675 */
2676 if (s->hit && !SSL_IS_TLS13(s))
2677 return s->session->ext.hostname;
2678 } else {
2679 /**
2680 * Client side
2681 *
2682 * Before the handshake:
2683 * - If a servername has been set via a call to
2684 * SSL_set_tlsext_host_name() then it will return that servername
2685 * - If one has not been set, but a TLSv1.2 resumption is being
2686 * attempted and the session from the original handshake had a
2687 * servername accepted by the server then it will return that
2688 * servername
2689 * - Otherwise it returns NULL
2690 *
2691 * During/after the handshake (TLSv1.2 or below resumption occurred):
2692 * - If the session from the original handshake had a servername accepted
2693 * by the server then it will return that servername.
2694 * - Otherwise it returns the servername set via
2695 * SSL_set_tlsext_host_name() (or NULL if it was not called).
2696 *
2697 * During/after the handshake (TLSv1.2 or below resumption did not occur):
2698 * - It will return the servername set via SSL_set_tlsext_host_name()
2699 * (or NULL if it was not called).
2700 */
2701 if (SSL_in_before(s)) {
2702 if (s->ext.hostname == NULL
2703 && s->session != NULL
2704 && s->session->ssl_version != TLS1_3_VERSION)
2705 return s->session->ext.hostname;
2706 } else {
2707 if (!SSL_IS_TLS13(s) && s->hit && s->session->ext.hostname != NULL)
2708 return s->session->ext.hostname;
2709 }
2710 }
2711
2712 return s->ext.hostname;
2713}
2714
2715int SSL_get_servername_type(const SSL *s)
2716{
2717 if (SSL_get_servername(s, TLSEXT_NAMETYPE_host_name) != NULL)
2718 return TLSEXT_NAMETYPE_host_name;
2719 return -1;
2720}
2721
2722/*
2723 * SSL_select_next_proto implements the standard protocol selection. It is
2724 * expected that this function is called from the callback set by
2725 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
2726 * vector of 8-bit, length prefixed byte strings. The length byte itself is
2727 * not included in the length. A byte string of length 0 is invalid. No byte
2728 * string may be truncated. The current, but experimental algorithm for
2729 * selecting the protocol is: 1) If the server doesn't support NPN then this
2730 * is indicated to the callback. In this case, the client application has to
2731 * abort the connection or have a default application level protocol. 2) If
2732 * the server supports NPN, but advertises an empty list then the client
2733 * selects the first protocol in its list, but indicates via the API that this
2734 * fallback case was enacted. 3) Otherwise, the client finds the first
2735 * protocol in the server's list that it supports and selects this protocol.
2736 * This is because it's assumed that the server has better information about
2737 * which protocol a client should use. 4) If the client doesn't support any
2738 * of the server's advertised protocols, then this is treated the same as
2739 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
2740 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
2741 */
2742int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
2743 const unsigned char *server,
2744 unsigned int server_len,
2745 const unsigned char *client, unsigned int client_len)
2746{
2747 unsigned int i, j;
2748 const unsigned char *result;
2749 int status = OPENSSL_NPN_UNSUPPORTED;
2750
2751 /*
2752 * For each protocol in server preference order, see if we support it.
2753 */
2754 for (i = 0; i < server_len;) {
2755 for (j = 0; j < client_len;) {
2756 if (server[i] == client[j] &&
2757 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
2758 /* We found a match */
2759 result = &server[i];
2760 status = OPENSSL_NPN_NEGOTIATED;
2761 goto found;
2762 }
2763 j += client[j];
2764 j++;
2765 }
2766 i += server[i];
2767 i++;
2768 }
2769
2770 /* There's no overlap between our protocols and the server's list. */
2771 result = client;
2772 status = OPENSSL_NPN_NO_OVERLAP;
2773
2774 found:
2775 *out = (unsigned char *)result + 1;
2776 *outlen = result[0];
2777 return status;
2778}
2779
2780#ifndef OPENSSL_NO_NEXTPROTONEG
2781/*
2782 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
2783 * client's requested protocol for this connection and returns 0. If the
2784 * client didn't request any protocol, then *data is set to NULL. Note that
2785 * the client can request any protocol it chooses. The value returned from
2786 * this function need not be a member of the list of supported protocols
2787 * provided by the callback.
2788 */
2789void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
2790 unsigned *len)
2791{
2792 *data = s->ext.npn;
2793 if (!*data) {
2794 *len = 0;
2795 } else {
2796 *len = (unsigned int)s->ext.npn_len;
2797 }
2798}
2799
2800/*
2801 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
2802 * a TLS server needs a list of supported protocols for Next Protocol
2803 * Negotiation. The returned list must be in wire format. The list is
2804 * returned by setting |out| to point to it and |outlen| to its length. This
2805 * memory will not be modified, but one should assume that the SSL* keeps a
2806 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
2807 * wishes to advertise. Otherwise, no such extension will be included in the
2808 * ServerHello.
2809 */
2810void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
2811 SSL_CTX_npn_advertised_cb_func cb,
2812 void *arg)
2813{
2814 ctx->ext.npn_advertised_cb = cb;
2815 ctx->ext.npn_advertised_cb_arg = arg;
2816}
2817
2818/*
2819 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
2820 * client needs to select a protocol from the server's provided list. |out|
2821 * must be set to point to the selected protocol (which may be within |in|).
2822 * The length of the protocol name must be written into |outlen|. The
2823 * server's advertised protocols are provided in |in| and |inlen|. The
2824 * callback can assume that |in| is syntactically valid. The client must
2825 * select a protocol. It is fatal to the connection if this callback returns
2826 * a value other than SSL_TLSEXT_ERR_OK.
2827 */
2828void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
2829 SSL_CTX_npn_select_cb_func cb,
2830 void *arg)
2831{
2832 ctx->ext.npn_select_cb = cb;
2833 ctx->ext.npn_select_cb_arg = arg;
2834}
2835#endif
2836
2837static int alpn_value_ok(const unsigned char *protos, unsigned int protos_len)
2838{
2839 unsigned int idx;
2840
2841 if (protos_len < 2 || protos == NULL)
2842 return 0;
2843
2844 for (idx = 0; idx < protos_len; idx += protos[idx] + 1) {
2845 if (protos[idx] == 0)
2846 return 0;
2847 }
2848 return idx == protos_len;
2849}
2850/*
2851 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
2852 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2853 * length-prefixed strings). Returns 0 on success.
2854 */
2855int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
2856 unsigned int protos_len)
2857{
2858 unsigned char *alpn;
2859
2860 if (protos_len == 0 || protos == NULL) {
2861 OPENSSL_free(ctx->ext.alpn);
2862 ctx->ext.alpn = NULL;
2863 ctx->ext.alpn_len = 0;
2864 return 0;
2865 }
2866 /* Not valid per RFC */
2867 if (!alpn_value_ok(protos, protos_len))
2868 return 1;
2869
2870 alpn = OPENSSL_memdup(protos, protos_len);
2871 if (alpn == NULL) {
2872 SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2873 return 1;
2874 }
2875 OPENSSL_free(ctx->ext.alpn);
2876 ctx->ext.alpn = alpn;
2877 ctx->ext.alpn_len = protos_len;
2878
2879 return 0;
2880}
2881
2882/*
2883 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
2884 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2885 * length-prefixed strings). Returns 0 on success.
2886 */
2887int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
2888 unsigned int protos_len)
2889{
2890 unsigned char *alpn;
2891
2892 if (protos_len == 0 || protos == NULL) {
2893 OPENSSL_free(ssl->ext.alpn);
2894 ssl->ext.alpn = NULL;
2895 ssl->ext.alpn_len = 0;
2896 return 0;
2897 }
2898 /* Not valid per RFC */
2899 if (!alpn_value_ok(protos, protos_len))
2900 return 1;
2901
2902 alpn = OPENSSL_memdup(protos, protos_len);
2903 if (alpn == NULL) {
2904 SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2905 return 1;
2906 }
2907 OPENSSL_free(ssl->ext.alpn);
2908 ssl->ext.alpn = alpn;
2909 ssl->ext.alpn_len = protos_len;
2910
2911 return 0;
2912}
2913
2914/*
2915 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
2916 * called during ClientHello processing in order to select an ALPN protocol
2917 * from the client's list of offered protocols.
2918 */
2919void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
2920 SSL_CTX_alpn_select_cb_func cb,
2921 void *arg)
2922{
2923 ctx->ext.alpn_select_cb = cb;
2924 ctx->ext.alpn_select_cb_arg = arg;
2925}
2926
2927/*
2928 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
2929 * On return it sets |*data| to point to |*len| bytes of protocol name
2930 * (not including the leading length-prefix byte). If the server didn't
2931 * respond with a negotiated protocol then |*len| will be zero.
2932 */
2933void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
2934 unsigned int *len)
2935{
2936 *data = NULL;
2937 if (ssl->s3)
2938 *data = ssl->s3->alpn_selected;
2939 if (*data == NULL)
2940 *len = 0;
2941 else
2942 *len = (unsigned int)ssl->s3->alpn_selected_len;
2943}
2944
2945int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
2946 const char *label, size_t llen,
2947 const unsigned char *context, size_t contextlen,
2948 int use_context)
2949{
2950 if (s->session == NULL
2951 || (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER))
2952 return -1;
2953
2954 return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
2955 llen, context,
2956 contextlen, use_context);
2957}
2958
2959int SSL_export_keying_material_early(SSL *s, unsigned char *out, size_t olen,
2960 const char *label, size_t llen,
2961 const unsigned char *context,
2962 size_t contextlen)
2963{
2964 if (s->version != TLS1_3_VERSION)
2965 return 0;
2966
2967 return tls13_export_keying_material_early(s, out, olen, label, llen,
2968 context, contextlen);
2969}
2970
2971static unsigned long ssl_session_hash(const SSL_SESSION *a)
2972{
2973 const unsigned char *session_id = a->session_id;
2974 unsigned long l;
2975 unsigned char tmp_storage[4];
2976
2977 if (a->session_id_length < sizeof(tmp_storage)) {
2978 memset(tmp_storage, 0, sizeof(tmp_storage));
2979 memcpy(tmp_storage, a->session_id, a->session_id_length);
2980 session_id = tmp_storage;
2981 }
2982
2983 l = (unsigned long)
2984 ((unsigned long)session_id[0]) |
2985 ((unsigned long)session_id[1] << 8L) |
2986 ((unsigned long)session_id[2] << 16L) |
2987 ((unsigned long)session_id[3] << 24L);
2988 return l;
2989}
2990
2991/*
2992 * NB: If this function (or indeed the hash function which uses a sort of
2993 * coarser function than this one) is changed, ensure
2994 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
2995 * being able to construct an SSL_SESSION that will collide with any existing
2996 * session with a matching session ID.
2997 */
2998static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
2999{
3000 if (a->ssl_version != b->ssl_version)
3001 return 1;
3002 if (a->session_id_length != b->session_id_length)
3003 return 1;
3004 return memcmp(a->session_id, b->session_id, a->session_id_length);
3005}
3006
3007/*
3008 * These wrapper functions should remain rather than redeclaring
3009 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
3010 * variable. The reason is that the functions aren't static, they're exposed
3011 * via ssl.h.
3012 */
3013
3014SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
3015{
3016 SSL_CTX *ret = NULL;
3017
3018 if (meth == NULL) {
3019 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED);
3020 return NULL;
3021 }
3022
3023 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
3024 return NULL;
3025
3026 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
3027 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
3028 goto err;
3029 }
3030 ret = OPENSSL_zalloc(sizeof(*ret));
3031 if (ret == NULL)
3032 goto err;
3033
3034 ret->method = meth;
3035 ret->min_proto_version = 0;
3036 ret->max_proto_version = 0;
3037 ret->mode = SSL_MODE_AUTO_RETRY;
3038 ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
3039 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
3040 /* We take the system default. */
3041 ret->session_timeout = meth->get_timeout();
3042 ret->references = 1;
3043 ret->lock = CRYPTO_THREAD_lock_new();
3044 if (ret->lock == NULL) {
3045 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
3046 OPENSSL_free(ret);
3047 return NULL;
3048 }
3049 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
3050 ret->verify_mode = SSL_VERIFY_NONE;
3051 if ((ret->cert = ssl_cert_new()) == NULL)
3052 goto err;
3053
3054 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
3055 if (ret->sessions == NULL)
3056 goto err;
3057 ret->cert_store = X509_STORE_new();
3058 if (ret->cert_store == NULL)
3059 goto err;
3060#ifndef OPENSSL_NO_CT
3061 ret->ctlog_store = CTLOG_STORE_new();
3062 if (ret->ctlog_store == NULL)
3063 goto err;
3064#endif
3065
3066 if (!SSL_CTX_set_ciphersuites(ret, TLS_DEFAULT_CIPHERSUITES))
3067 goto err;
3068
3069 if (!ssl_create_cipher_list(ret->method,
3070 ret->tls13_ciphersuites,
3071 &ret->cipher_list, &ret->cipher_list_by_id,
3072 SSL_DEFAULT_CIPHER_LIST, ret->cert)
3073 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
3074 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS);
3075 goto err2;
3076 }
3077
3078 ret->param = X509_VERIFY_PARAM_new();
3079 if (ret->param == NULL)
3080 goto err;
3081
3082 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
3083 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
3084 goto err2;
3085 }
3086 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) {
3087 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
3088 goto err2;
3089 }
3090
3091 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL)
3092 goto err;
3093
3094 if ((ret->client_ca_names = sk_X509_NAME_new_null()) == NULL)
3095 goto err;
3096
3097 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
3098 goto err;
3099
3100 if ((ret->ext.secure = OPENSSL_secure_zalloc(sizeof(*ret->ext.secure))) == NULL)
3101 goto err;
3102
3103 /* No compression for DTLS */
3104 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
3105 ret->comp_methods = SSL_COMP_get_compression_methods();
3106
3107 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3108 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3109
3110 /* Setup RFC5077 ticket keys */
3111 if ((RAND_bytes(ret->ext.tick_key_name,
3112 sizeof(ret->ext.tick_key_name)) <= 0)
3113 || (RAND_priv_bytes(ret->ext.secure->tick_hmac_key,
3114 sizeof(ret->ext.secure->tick_hmac_key)) <= 0)
3115 || (RAND_priv_bytes(ret->ext.secure->tick_aes_key,
3116 sizeof(ret->ext.secure->tick_aes_key)) <= 0))
3117 ret->options |= SSL_OP_NO_TICKET;
3118
3119 if (RAND_priv_bytes(ret->ext.cookie_hmac_key,
3120 sizeof(ret->ext.cookie_hmac_key)) <= 0)
3121 goto err;
3122
3123#ifndef OPENSSL_NO_SRP
3124 if (!SSL_CTX_SRP_CTX_init(ret))
3125 goto err;
3126#endif
3127#ifndef OPENSSL_NO_ENGINE
3128# ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
3129# define eng_strx(x) #x
3130# define eng_str(x) eng_strx(x)
3131 /* Use specific client engine automatically... ignore errors */
3132 {
3133 ENGINE *eng;
3134 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3135 if (!eng) {
3136 ERR_clear_error();
3137 ENGINE_load_builtin_engines();
3138 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3139 }
3140 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
3141 ERR_clear_error();
3142 }
3143# endif
3144#endif
3145 /*
3146 * Default is to connect to non-RI servers. When RI is more widely
3147 * deployed might change this.
3148 */
3149 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
3150 /*
3151 * Disable compression by default to prevent CRIME. Applications can
3152 * re-enable compression by configuring
3153 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
3154 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3
3155 * middlebox compatibility by default. This may be disabled by default in
3156 * a later OpenSSL version.
3157 */
3158 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT;
3159
3160 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
3161
3162 /*
3163 * We cannot usefully set a default max_early_data here (which gets
3164 * propagated in SSL_new(), for the following reason: setting the
3165 * SSL field causes tls_construct_stoc_early_data() to tell the
3166 * client that early data will be accepted when constructing a TLS 1.3
3167 * session ticket, and the client will accordingly send us early data
3168 * when using that ticket (if the client has early data to send).
3169 * However, in order for the early data to actually be consumed by
3170 * the application, the application must also have calls to
3171 * SSL_read_early_data(); otherwise we'll just skip past the early data
3172 * and ignore it. So, since the application must add calls to
3173 * SSL_read_early_data(), we also require them to add
3174 * calls to SSL_CTX_set_max_early_data() in order to use early data,
3175 * eliminating the bandwidth-wasting early data in the case described
3176 * above.
3177 */
3178 ret->max_early_data = 0;
3179
3180 /*
3181 * Default recv_max_early_data is a fully loaded single record. Could be
3182 * split across multiple records in practice. We set this differently to
3183 * max_early_data so that, in the default case, we do not advertise any
3184 * support for early_data, but if a client were to send us some (e.g.
3185 * because of an old, stale ticket) then we will tolerate it and skip over
3186 * it.
3187 */
3188 ret->recv_max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
3189
3190 /* By default we send two session tickets automatically in TLSv1.3 */
3191 ret->num_tickets = 2;
3192
3193 ssl_ctx_system_config(ret);
3194
3195 return ret;
3196 err:
3197 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
3198 err2:
3199 SSL_CTX_free(ret);
3200 return NULL;
3201}
3202
3203int SSL_CTX_up_ref(SSL_CTX *ctx)
3204{
3205 int i;
3206
3207 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
3208 return 0;
3209
3210 REF_PRINT_COUNT("SSL_CTX", ctx);
3211 REF_ASSERT_ISNT(i < 2);
3212 return ((i > 1) ? 1 : 0);
3213}
3214
3215void SSL_CTX_free(SSL_CTX *a)
3216{
3217 int i;
3218
3219 if (a == NULL)
3220 return;
3221
3222 CRYPTO_DOWN_REF(&a->references, &i, a->lock);
3223 REF_PRINT_COUNT("SSL_CTX", a);
3224 if (i > 0)
3225 return;
3226 REF_ASSERT_ISNT(i < 0);
3227
3228 X509_VERIFY_PARAM_free(a->param);
3229 dane_ctx_final(&a->dane);
3230
3231 /*
3232 * Free internal session cache. However: the remove_cb() may reference
3233 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
3234 * after the sessions were flushed.
3235 * As the ex_data handling routines might also touch the session cache,
3236 * the most secure solution seems to be: empty (flush) the cache, then
3237 * free ex_data, then finally free the cache.
3238 * (See ticket [openssl.org #212].)
3239 */
3240 if (a->sessions != NULL)
3241 SSL_CTX_flush_sessions(a, 0);
3242
3243 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
3244 lh_SSL_SESSION_free(a->sessions);
3245 X509_STORE_free(a->cert_store);
3246#ifndef OPENSSL_NO_CT
3247 CTLOG_STORE_free(a->ctlog_store);
3248#endif
3249 sk_SSL_CIPHER_free(a->cipher_list);
3250 sk_SSL_CIPHER_free(a->cipher_list_by_id);
3251 sk_SSL_CIPHER_free(a->tls13_ciphersuites);
3252 ssl_cert_free(a->cert);
3253 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free);
3254 sk_X509_NAME_pop_free(a->client_ca_names, X509_NAME_free);
3255 sk_X509_pop_free(a->extra_certs, X509_free);
3256 a->comp_methods = NULL;
3257#ifndef OPENSSL_NO_SRTP
3258 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
3259#endif
3260#ifndef OPENSSL_NO_SRP
3261 SSL_CTX_SRP_CTX_free(a);
3262#endif
3263#ifndef OPENSSL_NO_ENGINE
3264 ENGINE_finish(a->client_cert_engine);
3265#endif
3266
3267#ifndef OPENSSL_NO_EC
3268 OPENSSL_free(a->ext.ecpointformats);
3269 OPENSSL_free(a->ext.supportedgroups);
3270#endif
3271 OPENSSL_free(a->ext.alpn);
3272 OPENSSL_secure_free(a->ext.secure);
3273
3274 CRYPTO_THREAD_lock_free(a->lock);
3275
3276 OPENSSL_free(a);
3277}
3278
3279void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
3280{
3281 ctx->default_passwd_callback = cb;
3282}
3283
3284void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
3285{
3286 ctx->default_passwd_callback_userdata = u;
3287}
3288
3289pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
3290{
3291 return ctx->default_passwd_callback;
3292}
3293
3294void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
3295{
3296 return ctx->default_passwd_callback_userdata;
3297}
3298
3299void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
3300{
3301 s->default_passwd_callback = cb;
3302}
3303
3304void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
3305{
3306 s->default_passwd_callback_userdata = u;
3307}
3308
3309pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
3310{
3311 return s->default_passwd_callback;
3312}
3313
3314void *SSL_get_default_passwd_cb_userdata(SSL *s)
3315{
3316 return s->default_passwd_callback_userdata;
3317}
3318
3319void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
3320 int (*cb) (X509_STORE_CTX *, void *),
3321 void *arg)
3322{
3323 ctx->app_verify_callback = cb;
3324 ctx->app_verify_arg = arg;
3325}
3326
3327void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
3328 int (*cb) (int, X509_STORE_CTX *))
3329{
3330 ctx->verify_mode = mode;
3331 ctx->default_verify_callback = cb;
3332}
3333
3334void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
3335{
3336 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
3337}
3338
3339void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
3340{
3341 ssl_cert_set_cert_cb(c->cert, cb, arg);
3342}
3343
3344void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
3345{
3346 ssl_cert_set_cert_cb(s->cert, cb, arg);
3347}
3348
3349void ssl_set_masks(SSL *s)
3350{
3351 CERT *c = s->cert;
3352 uint32_t *pvalid = s->s3->tmp.valid_flags;
3353 int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
3354 unsigned long mask_k, mask_a;
3355#ifndef OPENSSL_NO_EC
3356 int have_ecc_cert, ecdsa_ok;
3357#endif
3358 if (c == NULL)
3359 return;
3360
3361#ifndef OPENSSL_NO_DH
3362 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
3363#else
3364 dh_tmp = 0;
3365#endif
3366
3367 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3368 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3369 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
3370#ifndef OPENSSL_NO_EC
3371 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
3372#endif
3373 mask_k = 0;
3374 mask_a = 0;
3375
3376#ifdef CIPHER_DEBUG
3377 fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n",
3378 dh_tmp, rsa_enc, rsa_sign, dsa_sign);
3379#endif
3380
3381#ifndef OPENSSL_NO_GOST
3382 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
3383 mask_k |= SSL_kGOST;
3384 mask_a |= SSL_aGOST12;
3385 }
3386 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
3387 mask_k |= SSL_kGOST;
3388 mask_a |= SSL_aGOST12;
3389 }
3390 if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
3391 mask_k |= SSL_kGOST;
3392 mask_a |= SSL_aGOST01;
3393 }
3394#endif
3395
3396 if (rsa_enc)
3397 mask_k |= SSL_kRSA;
3398
3399 if (dh_tmp)
3400 mask_k |= SSL_kDHE;
3401
3402 /*
3403 * If we only have an RSA-PSS certificate allow RSA authentication
3404 * if TLS 1.2 and peer supports it.
3405 */
3406
3407 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN)
3408 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN
3409 && TLS1_get_version(s) == TLS1_2_VERSION))
3410 mask_a |= SSL_aRSA;
3411
3412 if (dsa_sign) {
3413 mask_a |= SSL_aDSS;
3414 }
3415
3416 mask_a |= SSL_aNULL;
3417
3418 /*
3419 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
3420 * depending on the key usage extension.
3421 */
3422#ifndef OPENSSL_NO_EC
3423 if (have_ecc_cert) {
3424 uint32_t ex_kusage;
3425 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
3426 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
3427 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
3428 ecdsa_ok = 0;
3429 if (ecdsa_ok)
3430 mask_a |= SSL_aECDSA;
3431 }
3432 /* Allow Ed25519 for TLS 1.2 if peer supports it */
3433 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519)
3434 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
3435 && TLS1_get_version(s) == TLS1_2_VERSION)
3436 mask_a |= SSL_aECDSA;
3437
3438 /* Allow Ed448 for TLS 1.2 if peer supports it */
3439 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448)
3440 && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN
3441 && TLS1_get_version(s) == TLS1_2_VERSION)
3442 mask_a |= SSL_aECDSA;
3443#endif
3444
3445#ifndef OPENSSL_NO_EC
3446 mask_k |= SSL_kECDHE;
3447#endif
3448
3449#ifndef OPENSSL_NO_PSK
3450 mask_k |= SSL_kPSK;
3451 mask_a |= SSL_aPSK;
3452 if (mask_k & SSL_kRSA)
3453 mask_k |= SSL_kRSAPSK;
3454 if (mask_k & SSL_kDHE)
3455 mask_k |= SSL_kDHEPSK;
3456 if (mask_k & SSL_kECDHE)
3457 mask_k |= SSL_kECDHEPSK;
3458#endif
3459
3460 s->s3->tmp.mask_k = mask_k;
3461 s->s3->tmp.mask_a = mask_a;
3462}
3463
3464#ifndef OPENSSL_NO_EC
3465
3466int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
3467{
3468 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
3469 /* key usage, if present, must allow signing */
3470 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
3471 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
3472 SSL_R_ECC_CERT_NOT_FOR_SIGNING);
3473 return 0;
3474 }
3475 }
3476 return 1; /* all checks are ok */
3477}
3478
3479#endif
3480
3481int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
3482 size_t *serverinfo_length)
3483{
3484 CERT_PKEY *cpk = s->s3->tmp.cert;
3485 *serverinfo_length = 0;
3486
3487 if (cpk == NULL || cpk->serverinfo == NULL)
3488 return 0;
3489
3490 *serverinfo = cpk->serverinfo;
3491 *serverinfo_length = cpk->serverinfo_length;
3492 return 1;
3493}
3494
3495void ssl_update_cache(SSL *s, int mode)
3496{
3497 int i;
3498
3499 /*
3500 * If the session_id_length is 0, we are not supposed to cache it, and it
3501 * would be rather hard to do anyway :-)
3502 */
3503 if (s->session->session_id_length == 0)
3504 return;
3505
3506 /*
3507 * If sid_ctx_length is 0 there is no specific application context
3508 * associated with this session, so when we try to resume it and
3509 * SSL_VERIFY_PEER is requested to verify the client identity, we have no
3510 * indication that this is actually a session for the proper application
3511 * context, and the *handshake* will fail, not just the resumption attempt.
3512 * Do not cache (on the server) these sessions that are not resumable
3513 * (clients can set SSL_VERIFY_PEER without needing a sid_ctx set).
3514 */
3515 if (s->server && s->session->sid_ctx_length == 0
3516 && (s->verify_mode & SSL_VERIFY_PEER) != 0)
3517 return;
3518
3519 i = s->session_ctx->session_cache_mode;
3520 if ((i & mode) != 0
3521 && (!s->hit || SSL_IS_TLS13(s))) {
3522 /*
3523 * Add the session to the internal cache. In server side TLSv1.3 we
3524 * normally don't do this because by default it's a full stateless ticket
3525 * with only a dummy session id so there is no reason to cache it,
3526 * unless:
3527 * - we are doing early_data, in which case we cache so that we can
3528 * detect replays
3529 * - the application has set a remove_session_cb so needs to know about
3530 * session timeout events
3531 * - SSL_OP_NO_TICKET is set in which case it is a stateful ticket
3532 */
3533 if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0
3534 && (!SSL_IS_TLS13(s)
3535 || !s->server
3536 || (s->max_early_data > 0
3537 && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)
3538 || s->session_ctx->remove_session_cb != NULL
3539 || (s->options & SSL_OP_NO_TICKET) != 0))
3540 SSL_CTX_add_session(s->session_ctx, s->session);
3541
3542 /*
3543 * Add the session to the external cache. We do this even in server side
3544 * TLSv1.3 without early data because some applications just want to
3545 * know about the creation of a session and aren't doing a full cache.
3546 */
3547 if (s->session_ctx->new_session_cb != NULL) {
3548 SSL_SESSION_up_ref(s->session);
3549 if (!s->session_ctx->new_session_cb(s, s->session))
3550 SSL_SESSION_free(s->session);
3551 }
3552 }
3553
3554 /* auto flush every 255 connections */
3555 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
3556 TSAN_QUALIFIER int *stat;
3557 if (mode & SSL_SESS_CACHE_CLIENT)
3558 stat = &s->session_ctx->stats.sess_connect_good;
3559 else
3560 stat = &s->session_ctx->stats.sess_accept_good;
3561 if ((tsan_load(stat) & 0xff) == 0xff)
3562 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
3563 }
3564}
3565
3566const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx)
3567{
3568 return ctx->method;
3569}
3570
3571const SSL_METHOD *SSL_get_ssl_method(const SSL *s)
3572{
3573 return s->method;
3574}
3575
3576int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
3577{
3578 int ret = 1;
3579
3580 if (s->method != meth) {
3581 const SSL_METHOD *sm = s->method;
3582 int (*hf) (SSL *) = s->handshake_func;
3583
3584 if (sm->version == meth->version)
3585 s->method = meth;
3586 else {
3587 sm->ssl_free(s);
3588 s->method = meth;
3589 ret = s->method->ssl_new(s);
3590 }
3591
3592 if (hf == sm->ssl_connect)
3593 s->handshake_func = meth->ssl_connect;
3594 else if (hf == sm->ssl_accept)
3595 s->handshake_func = meth->ssl_accept;
3596 }
3597 return ret;
3598}
3599
3600int SSL_get_error(const SSL *s, int i)
3601{
3602 int reason;
3603 unsigned long l;
3604 BIO *bio;
3605
3606 if (i > 0)
3607 return SSL_ERROR_NONE;
3608
3609 /*
3610 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
3611 * where we do encode the error
3612 */
3613 if ((l = ERR_peek_error()) != 0) {
3614 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
3615 return SSL_ERROR_SYSCALL;
3616 else
3617 return SSL_ERROR_SSL;
3618 }
3619
3620 if (SSL_want_read(s)) {
3621 bio = SSL_get_rbio(s);
3622 if (BIO_should_read(bio))
3623 return SSL_ERROR_WANT_READ;
3624 else if (BIO_should_write(bio))
3625 /*
3626 * This one doesn't make too much sense ... We never try to write
3627 * to the rbio, and an application program where rbio and wbio
3628 * are separate couldn't even know what it should wait for.
3629 * However if we ever set s->rwstate incorrectly (so that we have
3630 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
3631 * wbio *are* the same, this test works around that bug; so it
3632 * might be safer to keep it.
3633 */
3634 return SSL_ERROR_WANT_WRITE;
3635 else if (BIO_should_io_special(bio)) {
3636 reason = BIO_get_retry_reason(bio);
3637 if (reason == BIO_RR_CONNECT)
3638 return SSL_ERROR_WANT_CONNECT;
3639 else if (reason == BIO_RR_ACCEPT)
3640 return SSL_ERROR_WANT_ACCEPT;
3641 else
3642 return SSL_ERROR_SYSCALL; /* unknown */
3643 }
3644 }
3645
3646 if (SSL_want_write(s)) {
3647 /* Access wbio directly - in order to use the buffered bio if present */
3648 bio = s->wbio;
3649 if (BIO_should_write(bio))
3650 return SSL_ERROR_WANT_WRITE;
3651 else if (BIO_should_read(bio))
3652 /*
3653 * See above (SSL_want_read(s) with BIO_should_write(bio))
3654 */
3655 return SSL_ERROR_WANT_READ;
3656 else if (BIO_should_io_special(bio)) {
3657 reason = BIO_get_retry_reason(bio);
3658 if (reason == BIO_RR_CONNECT)
3659 return SSL_ERROR_WANT_CONNECT;
3660 else if (reason == BIO_RR_ACCEPT)
3661 return SSL_ERROR_WANT_ACCEPT;
3662 else
3663 return SSL_ERROR_SYSCALL;
3664 }
3665 }
3666 if (SSL_want_x509_lookup(s))
3667 return SSL_ERROR_WANT_X509_LOOKUP;
3668 if (SSL_want_async(s))
3669 return SSL_ERROR_WANT_ASYNC;
3670 if (SSL_want_async_job(s))
3671 return SSL_ERROR_WANT_ASYNC_JOB;
3672 if (SSL_want_client_hello_cb(s))
3673 return SSL_ERROR_WANT_CLIENT_HELLO_CB;
3674
3675 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
3676 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
3677 return SSL_ERROR_ZERO_RETURN;
3678
3679 return SSL_ERROR_SYSCALL;
3680}
3681
3682static int ssl_do_handshake_intern(void *vargs)
3683{
3684 struct ssl_async_args *args;
3685 SSL *s;
3686
3687 args = (struct ssl_async_args *)vargs;
3688 s = args->s;
3689
3690 return s->handshake_func(s);
3691}
3692
3693int SSL_do_handshake(SSL *s)
3694{
3695 int ret = 1;
3696
3697 if (s->handshake_func == NULL) {
3698 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET);
3699 return -1;
3700 }
3701
3702 ossl_statem_check_finish_init(s, -1);
3703
3704 s->method->ssl_renegotiate_check(s, 0);
3705
3706 if (SSL_in_init(s) || SSL_in_before(s)) {
3707 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
3708 struct ssl_async_args args;
3709
3710 args.s = s;
3711
3712 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
3713 } else {
3714 ret = s->handshake_func(s);
3715 }
3716 }
3717 return ret;
3718}
3719
3720void SSL_set_accept_state(SSL *s)
3721{
3722 s->server = 1;
3723 s->shutdown = 0;
3724 ossl_statem_clear(s);
3725 s->handshake_func = s->method->ssl_accept;
3726 clear_ciphers(s);
3727}
3728
3729void SSL_set_connect_state(SSL *s)
3730{
3731 s->server = 0;
3732 s->shutdown = 0;
3733 ossl_statem_clear(s);
3734 s->handshake_func = s->method->ssl_connect;
3735 clear_ciphers(s);
3736}
3737
3738int ssl_undefined_function(SSL *s)
3739{
3740 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3741 return 0;
3742}
3743
3744int ssl_undefined_void_function(void)
3745{
3746 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
3747 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3748 return 0;
3749}
3750
3751int ssl_undefined_const_function(const SSL *s)
3752{
3753 return 0;
3754}
3755
3756const SSL_METHOD *ssl_bad_method(int ver)
3757{
3758 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3759 return NULL;
3760}
3761
3762const char *ssl_protocol_to_string(int version)
3763{
3764 switch(version)
3765 {
3766 case TLS1_3_VERSION:
3767 return "TLSv1.3";
3768
3769 case TLS1_2_VERSION:
3770 return "TLSv1.2";
3771
3772 case TLS1_1_VERSION:
3773 return "TLSv1.1";
3774
3775 case TLS1_VERSION:
3776 return "TLSv1";
3777
3778 case SSL3_VERSION:
3779 return "SSLv3";
3780
3781 case DTLS1_BAD_VER:
3782 return "DTLSv0.9";
3783
3784 case DTLS1_VERSION:
3785 return "DTLSv1";
3786
3787 case DTLS1_2_VERSION:
3788 return "DTLSv1.2";
3789
3790 default:
3791 return "unknown";
3792 }
3793}
3794
3795const char *SSL_get_version(const SSL *s)
3796{
3797 return ssl_protocol_to_string(s->version);
3798}
3799
3800static int dup_ca_names(STACK_OF(X509_NAME) **dst, STACK_OF(X509_NAME) *src)
3801{
3802 STACK_OF(X509_NAME) *sk;
3803 X509_NAME *xn;
3804 int i;
3805
3806 if (src == NULL) {
3807 *dst = NULL;
3808 return 1;
3809 }
3810
3811 if ((sk = sk_X509_NAME_new_null()) == NULL)
3812 return 0;
3813 for (i = 0; i < sk_X509_NAME_num(src); i++) {
3814 xn = X509_NAME_dup(sk_X509_NAME_value(src, i));
3815 if (xn == NULL) {
3816 sk_X509_NAME_pop_free(sk, X509_NAME_free);
3817 return 0;
3818 }
3819 if (sk_X509_NAME_insert(sk, xn, i) == 0) {
3820 X509_NAME_free(xn);
3821 sk_X509_NAME_pop_free(sk, X509_NAME_free);
3822 return 0;
3823 }
3824 }
3825 *dst = sk;
3826
3827 return 1;
3828}
3829
3830SSL *SSL_dup(SSL *s)
3831{
3832 SSL *ret;
3833 int i;
3834
3835 /* If we're not quiescent, just up_ref! */
3836 if (!SSL_in_init(s) || !SSL_in_before(s)) {
3837 CRYPTO_UP_REF(&s->references, &i, s->lock);
3838 return s;
3839 }
3840
3841 /*
3842 * Otherwise, copy configuration state, and session if set.
3843 */
3844 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
3845 return NULL;
3846
3847 if (s->session != NULL) {
3848 /*
3849 * Arranges to share the same session via up_ref. This "copies"
3850 * session-id, SSL_METHOD, sid_ctx, and 'cert'
3851 */
3852 if (!SSL_copy_session_id(ret, s))
3853 goto err;
3854 } else {
3855 /*
3856 * No session has been established yet, so we have to expect that
3857 * s->cert or ret->cert will be changed later -- they should not both
3858 * point to the same object, and thus we can't use
3859 * SSL_copy_session_id.
3860 */
3861 if (!SSL_set_ssl_method(ret, s->method))
3862 goto err;
3863
3864 if (s->cert != NULL) {
3865 ssl_cert_free(ret->cert);
3866 ret->cert = ssl_cert_dup(s->cert);
3867 if (ret->cert == NULL)
3868 goto err;
3869 }
3870
3871 if (!SSL_set_session_id_context(ret, s->sid_ctx,
3872 (int)s->sid_ctx_length))
3873 goto err;
3874 }
3875
3876 if (!ssl_dane_dup(ret, s))
3877 goto err;
3878 ret->version = s->version;
3879 ret->options = s->options;
3880 ret->min_proto_version = s->min_proto_version;
3881 ret->max_proto_version = s->max_proto_version;
3882 ret->mode = s->mode;
3883 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
3884 SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
3885 ret->msg_callback = s->msg_callback;
3886 ret->msg_callback_arg = s->msg_callback_arg;
3887 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
3888 SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
3889 ret->generate_session_id = s->generate_session_id;
3890
3891 SSL_set_info_callback(ret, SSL_get_info_callback(s));
3892
3893 /* copy app data, a little dangerous perhaps */
3894 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
3895 goto err;
3896
3897 ret->server = s->server;
3898 if (s->handshake_func) {
3899 if (s->server)
3900 SSL_set_accept_state(ret);
3901 else
3902 SSL_set_connect_state(ret);
3903 }
3904 ret->shutdown = s->shutdown;
3905 ret->hit = s->hit;
3906
3907 ret->default_passwd_callback = s->default_passwd_callback;
3908 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;
3909
3910 X509_VERIFY_PARAM_inherit(ret->param, s->param);
3911
3912 /* dup the cipher_list and cipher_list_by_id stacks */
3913 if (s->cipher_list != NULL) {
3914 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
3915 goto err;
3916 }
3917 if (s->cipher_list_by_id != NULL)
3918 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id))
3919 == NULL)
3920 goto err;
3921
3922 /* Dup the client_CA list */
3923 if (!dup_ca_names(&ret->ca_names, s->ca_names)
3924 || !dup_ca_names(&ret->client_ca_names, s->client_ca_names))
3925 goto err;
3926
3927 return ret;
3928
3929 err:
3930 SSL_free(ret);
3931 return NULL;
3932}
3933
3934void ssl_clear_cipher_ctx(SSL *s)
3935{
3936 if (s->enc_read_ctx != NULL) {
3937 EVP_CIPHER_CTX_free(s->enc_read_ctx);
3938 s->enc_read_ctx = NULL;
3939 }
3940 if (s->enc_write_ctx != NULL) {
3941 EVP_CIPHER_CTX_free(s->enc_write_ctx);
3942 s->enc_write_ctx = NULL;
3943 }
3944#ifndef OPENSSL_NO_COMP
3945 COMP_CTX_free(s->expand);
3946 s->expand = NULL;
3947 COMP_CTX_free(s->compress);
3948 s->compress = NULL;
3949#endif
3950}
3951
3952X509 *SSL_get_certificate(const SSL *s)
3953{
3954 if (s->cert != NULL)
3955 return s->cert->key->x509;
3956 else
3957 return NULL;
3958}
3959
3960EVP_PKEY *SSL_get_privatekey(const SSL *s)
3961{
3962 if (s->cert != NULL)
3963 return s->cert->key->privatekey;
3964 else
3965 return NULL;
3966}
3967
3968X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3969{
3970 if (ctx->cert != NULL)
3971 return ctx->cert->key->x509;
3972 else
3973 return NULL;
3974}
3975
3976EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3977{
3978 if (ctx->cert != NULL)
3979 return ctx->cert->key->privatekey;
3980 else
3981 return NULL;
3982}
3983
3984const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3985{
3986 if ((s->session != NULL) && (s->session->cipher != NULL))
3987 return s->session->cipher;
3988 return NULL;
3989}
3990
3991const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s)
3992{
3993 return s->s3->tmp.new_cipher;
3994}
3995
3996const COMP_METHOD *SSL_get_current_compression(const SSL *s)
3997{
3998#ifndef OPENSSL_NO_COMP
3999 return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
4000#else
4001 return NULL;
4002#endif
4003}
4004
4005const COMP_METHOD *SSL_get_current_expansion(const SSL *s)
4006{
4007#ifndef OPENSSL_NO_COMP
4008 return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
4009#else
4010 return NULL;
4011#endif
4012}
4013
4014int ssl_init_wbio_buffer(SSL *s)
4015{
4016 BIO *bbio;
4017
4018 if (s->bbio != NULL) {
4019 /* Already buffered. */
4020 return 1;
4021 }
4022
4023 bbio = BIO_new(BIO_f_buffer());
4024 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) {
4025 BIO_free(bbio);
4026 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB);
4027 return 0;
4028 }
4029 s->bbio = bbio;
4030 s->wbio = BIO_push(bbio, s->wbio);
4031
4032 return 1;
4033}
4034
4035int ssl_free_wbio_buffer(SSL *s)
4036{
4037 /* callers ensure s is never null */
4038 if (s->bbio == NULL)
4039 return 1;
4040
4041 s->wbio = BIO_pop(s->wbio);
4042 BIO_free(s->bbio);
4043 s->bbio = NULL;
4044
4045 return 1;
4046}
4047
4048void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
4049{
4050 ctx->quiet_shutdown = mode;
4051}
4052
4053int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
4054{
4055 return ctx->quiet_shutdown;
4056}
4057
4058void SSL_set_quiet_shutdown(SSL *s, int mode)
4059{
4060 s->quiet_shutdown = mode;
4061}
4062
4063int SSL_get_quiet_shutdown(const SSL *s)
4064{
4065 return s->quiet_shutdown;
4066}
4067
4068void SSL_set_shutdown(SSL *s, int mode)
4069{
4070 s->shutdown = mode;
4071}
4072
4073int SSL_get_shutdown(const SSL *s)
4074{
4075 return s->shutdown;
4076}
4077
4078int SSL_version(const SSL *s)
4079{
4080 return s->version;
4081}
4082
4083int SSL_client_version(const SSL *s)
4084{
4085 return s->client_version;
4086}
4087
4088SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
4089{
4090 return ssl->ctx;
4091}
4092
4093SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
4094{
4095 CERT *new_cert;
4096 if (ssl->ctx == ctx)
4097 return ssl->ctx;
4098 if (ctx == NULL)
4099 ctx = ssl->session_ctx;
4100 new_cert = ssl_cert_dup(ctx->cert);
4101 if (new_cert == NULL) {
4102 return NULL;
4103 }
4104
4105 if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) {
4106 ssl_cert_free(new_cert);
4107 return NULL;
4108 }
4109
4110 ssl_cert_free(ssl->cert);
4111 ssl->cert = new_cert;
4112
4113 /*
4114 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
4115 * so setter APIs must prevent invalid lengths from entering the system.
4116 */
4117 if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)))
4118 return NULL;
4119
4120 /*
4121 * If the session ID context matches that of the parent SSL_CTX,
4122 * inherit it from the new SSL_CTX as well. If however the context does
4123 * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
4124 * leave it unchanged.
4125 */
4126 if ((ssl->ctx != NULL) &&
4127 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
4128 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) {
4129 ssl->sid_ctx_length = ctx->sid_ctx_length;
4130 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
4131 }
4132
4133 SSL_CTX_up_ref(ctx);
4134 SSL_CTX_free(ssl->ctx); /* decrement reference count */
4135 ssl->ctx = ctx;
4136
4137 return ssl->ctx;
4138}
4139
4140int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
4141{
4142 return X509_STORE_set_default_paths(ctx->cert_store);
4143}
4144
4145int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
4146{
4147 X509_LOOKUP *lookup;
4148
4149 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
4150 if (lookup == NULL)
4151 return 0;
4152 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
4153
4154 /* Clear any errors if the default directory does not exist */
4155 ERR_clear_error();
4156
4157 return 1;
4158}
4159
4160int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
4161{
4162 X509_LOOKUP *lookup;
4163
4164 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
4165 if (lookup == NULL)
4166 return 0;
4167
4168 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
4169
4170 /* Clear any errors if the default file does not exist */
4171 ERR_clear_error();
4172
4173 return 1;
4174}
4175
4176int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
4177 const char *CApath)
4178{
4179 return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath);
4180}
4181
4182void SSL_set_info_callback(SSL *ssl,
4183 void (*cb) (const SSL *ssl, int type, int val))
4184{
4185 ssl->info_callback = cb;
4186}
4187
4188/*
4189 * One compiler (Diab DCC) doesn't like argument names in returned function
4190 * pointer.
4191 */
4192void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
4193 int /* type */ ,
4194 int /* val */ ) {
4195 return ssl->info_callback;
4196}
4197
4198void SSL_set_verify_result(SSL *ssl, long arg)
4199{
4200 ssl->verify_result = arg;
4201}
4202
4203long SSL_get_verify_result(const SSL *ssl)
4204{
4205 return ssl->verify_result;
4206}
4207
4208size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
4209{
4210 if (outlen == 0)
4211 return sizeof(ssl->s3->client_random);
4212 if (outlen > sizeof(ssl->s3->client_random))
4213 outlen = sizeof(ssl->s3->client_random);
4214 memcpy(out, ssl->s3->client_random, outlen);
4215 return outlen;
4216}
4217
4218size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
4219{
4220 if (outlen == 0)
4221 return sizeof(ssl->s3->server_random);
4222 if (outlen > sizeof(ssl->s3->server_random))
4223 outlen = sizeof(ssl->s3->server_random);
4224 memcpy(out, ssl->s3->server_random, outlen);
4225 return outlen;
4226}
4227
4228size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
4229 unsigned char *out, size_t outlen)
4230{
4231 if (outlen == 0)
4232 return session->master_key_length;
4233 if (outlen > session->master_key_length)
4234 outlen = session->master_key_length;
4235 memcpy(out, session->master_key, outlen);
4236 return outlen;
4237}
4238
4239int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in,
4240 size_t len)
4241{
4242 if (len > sizeof(sess->master_key))
4243 return 0;
4244
4245 memcpy(sess->master_key, in, len);
4246 sess->master_key_length = len;
4247 return 1;
4248}
4249
4250
4251int SSL_set_ex_data(SSL *s, int idx, void *arg)
4252{
4253 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4254}
4255
4256void *SSL_get_ex_data(const SSL *s, int idx)
4257{
4258 return CRYPTO_get_ex_data(&s->ex_data, idx);
4259}
4260
4261int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
4262{
4263 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4264}
4265
4266void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
4267{
4268 return CRYPTO_get_ex_data(&s->ex_data, idx);
4269}
4270
4271X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
4272{
4273 return ctx->cert_store;
4274}
4275
4276void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
4277{
4278 X509_STORE_free(ctx->cert_store);
4279 ctx->cert_store = store;
4280}
4281
4282void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
4283{
4284 if (store != NULL)
4285 X509_STORE_up_ref(store);
4286 SSL_CTX_set_cert_store(ctx, store);
4287}
4288
4289int SSL_want(const SSL *s)
4290{
4291 return s->rwstate;
4292}
4293
4294/**
4295 * \brief Set the callback for generating temporary DH keys.
4296 * \param ctx the SSL context.
4297 * \param dh the callback
4298 */
4299
4300#ifndef OPENSSL_NO_DH
4301void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
4302 DH *(*dh) (SSL *ssl, int is_export,
4303 int keylength))
4304{
4305 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4306}
4307
4308void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export,
4309 int keylength))
4310{
4311 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4312}
4313#endif
4314
4315#ifndef OPENSSL_NO_PSK
4316int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
4317{
4318 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4319 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4320 return 0;
4321 }
4322 OPENSSL_free(ctx->cert->psk_identity_hint);
4323 if (identity_hint != NULL) {
4324 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4325 if (ctx->cert->psk_identity_hint == NULL)
4326 return 0;
4327 } else
4328 ctx->cert->psk_identity_hint = NULL;
4329 return 1;
4330}
4331
4332int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
4333{
4334 if (s == NULL)
4335 return 0;
4336
4337 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4338 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4339 return 0;
4340 }
4341 OPENSSL_free(s->cert->psk_identity_hint);
4342 if (identity_hint != NULL) {
4343 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4344 if (s->cert->psk_identity_hint == NULL)
4345 return 0;
4346 } else
4347 s->cert->psk_identity_hint = NULL;
4348 return 1;
4349}
4350
4351const char *SSL_get_psk_identity_hint(const SSL *s)
4352{
4353 if (s == NULL || s->session == NULL)
4354 return NULL;
4355 return s->session->psk_identity_hint;
4356}
4357
4358const char *SSL_get_psk_identity(const SSL *s)
4359{
4360 if (s == NULL || s->session == NULL)
4361 return NULL;
4362 return s->session->psk_identity;
4363}
4364
4365void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
4366{
4367 s->psk_client_callback = cb;
4368}
4369
4370void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
4371{
4372 ctx->psk_client_callback = cb;
4373}
4374
4375void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
4376{
4377 s->psk_server_callback = cb;
4378}
4379
4380void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
4381{
4382 ctx->psk_server_callback = cb;
4383}
4384#endif
4385
4386void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb)
4387{
4388 s->psk_find_session_cb = cb;
4389}
4390
4391void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
4392 SSL_psk_find_session_cb_func cb)
4393{
4394 ctx->psk_find_session_cb = cb;
4395}
4396
4397void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
4398{
4399 s->psk_use_session_cb = cb;
4400}
4401
4402void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx,
4403 SSL_psk_use_session_cb_func cb)
4404{
4405 ctx->psk_use_session_cb = cb;
4406}
4407
4408void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
4409 void (*cb) (int write_p, int version,
4410 int content_type, const void *buf,
4411 size_t len, SSL *ssl, void *arg))
4412{
4413 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4414}
4415
4416void SSL_set_msg_callback(SSL *ssl,
4417 void (*cb) (int write_p, int version,
4418 int content_type, const void *buf,
4419 size_t len, SSL *ssl, void *arg))
4420{
4421 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4422}
4423
4424void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
4425 int (*cb) (SSL *ssl,
4426 int
4427 is_forward_secure))
4428{
4429 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4430 (void (*)(void))cb);
4431}
4432
4433void SSL_set_not_resumable_session_callback(SSL *ssl,
4434 int (*cb) (SSL *ssl,
4435 int is_forward_secure))
4436{
4437 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4438 (void (*)(void))cb);
4439}
4440
4441void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx,
4442 size_t (*cb) (SSL *ssl, int type,
4443 size_t len, void *arg))
4444{
4445 ctx->record_padding_cb = cb;
4446}
4447
4448void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg)
4449{
4450 ctx->record_padding_arg = arg;
4451}
4452
4453void *SSL_CTX_get_record_padding_callback_arg(const SSL_CTX *ctx)
4454{
4455 return ctx->record_padding_arg;
4456}
4457
4458int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size)
4459{
4460 /* block size of 0 or 1 is basically no padding */
4461 if (block_size == 1)
4462 ctx->block_padding = 0;
4463 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4464 ctx->block_padding = block_size;
4465 else
4466 return 0;
4467 return 1;
4468}
4469
4470void SSL_set_record_padding_callback(SSL *ssl,
4471 size_t (*cb) (SSL *ssl, int type,
4472 size_t len, void *arg))
4473{
4474 ssl->record_padding_cb = cb;
4475}
4476
4477void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg)
4478{
4479 ssl->record_padding_arg = arg;
4480}
4481
4482void *SSL_get_record_padding_callback_arg(const SSL *ssl)
4483{
4484 return ssl->record_padding_arg;
4485}
4486
4487int SSL_set_block_padding(SSL *ssl, size_t block_size)
4488{
4489 /* block size of 0 or 1 is basically no padding */
4490 if (block_size == 1)
4491 ssl->block_padding = 0;
4492 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4493 ssl->block_padding = block_size;
4494 else
4495 return 0;
4496 return 1;
4497}
4498
4499int SSL_set_num_tickets(SSL *s, size_t num_tickets)
4500{
4501 s->num_tickets = num_tickets;
4502
4503 return 1;
4504}
4505
4506size_t SSL_get_num_tickets(const SSL *s)
4507{
4508 return s->num_tickets;
4509}
4510
4511int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets)
4512{
4513 ctx->num_tickets = num_tickets;
4514
4515 return 1;
4516}
4517
4518size_t SSL_CTX_get_num_tickets(const SSL_CTX *ctx)
4519{
4520 return ctx->num_tickets;
4521}
4522
4523/*
4524 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
4525 * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
4526 * If EVP_MD pointer is passed, initializes ctx with this |md|.
4527 * Returns the newly allocated ctx;
4528 */
4529
4530EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
4531{
4532 ssl_clear_hash_ctx(hash);
4533 *hash = EVP_MD_CTX_new();
4534 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
4535 EVP_MD_CTX_free(*hash);
4536 *hash = NULL;
4537 return NULL;
4538 }
4539 return *hash;
4540}
4541
4542void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
4543{
4544
4545 EVP_MD_CTX_free(*hash);
4546 *hash = NULL;
4547}
4548
4549/* Retrieve handshake hashes */
4550int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
4551 size_t *hashlen)
4552{
4553 EVP_MD_CTX *ctx = NULL;
4554 EVP_MD_CTX *hdgst = s->s3->handshake_dgst;
4555 int hashleni = EVP_MD_CTX_size(hdgst);
4556 int ret = 0;
4557
4558 if (hashleni < 0 || (size_t)hashleni > outlen) {
4559 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4560 ERR_R_INTERNAL_ERROR);
4561 goto err;
4562 }
4563
4564 ctx = EVP_MD_CTX_new();
4565 if (ctx == NULL) {
4566 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4567 ERR_R_INTERNAL_ERROR);
4568 goto err;
4569 }
4570
4571 if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
4572 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) {
4573 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4574 ERR_R_INTERNAL_ERROR);
4575 goto err;
4576 }
4577
4578 *hashlen = hashleni;
4579
4580 ret = 1;
4581 err:
4582 EVP_MD_CTX_free(ctx);
4583 return ret;
4584}
4585
4586int SSL_session_reused(const SSL *s)
4587{
4588 return s->hit;
4589}
4590
4591int SSL_is_server(const SSL *s)
4592{
4593 return s->server;
4594}
4595
4596#if OPENSSL_API_COMPAT < 0x10100000L
4597void SSL_set_debug(SSL *s, int debug)
4598{
4599 /* Old function was do-nothing anyway... */
4600 (void)s;
4601 (void)debug;
4602}
4603#endif
4604
4605void SSL_set_security_level(SSL *s, int level)
4606{
4607 s->cert->sec_level = level;
4608}
4609
4610int SSL_get_security_level(const SSL *s)
4611{
4612 return s->cert->sec_level;
4613}
4614
4615void SSL_set_security_callback(SSL *s,
4616 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4617 int op, int bits, int nid,
4618 void *other, void *ex))
4619{
4620 s->cert->sec_cb = cb;
4621}
4622
4623int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
4624 const SSL_CTX *ctx, int op,
4625 int bits, int nid, void *other,
4626 void *ex) {
4627 return s->cert->sec_cb;
4628}
4629
4630void SSL_set0_security_ex_data(SSL *s, void *ex)
4631{
4632 s->cert->sec_ex = ex;
4633}
4634
4635void *SSL_get0_security_ex_data(const SSL *s)
4636{
4637 return s->cert->sec_ex;
4638}
4639
4640void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
4641{
4642 ctx->cert->sec_level = level;
4643}
4644
4645int SSL_CTX_get_security_level(const SSL_CTX *ctx)
4646{
4647 return ctx->cert->sec_level;
4648}
4649
4650void SSL_CTX_set_security_callback(SSL_CTX *ctx,
4651 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4652 int op, int bits, int nid,
4653 void *other, void *ex))
4654{
4655 ctx->cert->sec_cb = cb;
4656}
4657
4658int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
4659 const SSL_CTX *ctx,
4660 int op, int bits,
4661 int nid,
4662 void *other,
4663 void *ex) {
4664 return ctx->cert->sec_cb;
4665}
4666
4667void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
4668{
4669 ctx->cert->sec_ex = ex;
4670}
4671
4672void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
4673{
4674 return ctx->cert->sec_ex;
4675}
4676
4677/*
4678 * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that
4679 * can return unsigned long, instead of the generic long return value from the
4680 * control interface.
4681 */
4682unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
4683{
4684 return ctx->options;
4685}
4686
4687unsigned long SSL_get_options(const SSL *s)
4688{
4689 return s->options;
4690}
4691
4692unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op)
4693{
4694 return ctx->options |= op;
4695}
4696
4697unsigned long SSL_set_options(SSL *s, unsigned long op)
4698{
4699 return s->options |= op;
4700}
4701
4702unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op)
4703{
4704 return ctx->options &= ~op;
4705}
4706
4707unsigned long SSL_clear_options(SSL *s, unsigned long op)
4708{
4709 return s->options &= ~op;
4710}
4711
4712STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
4713{
4714 return s->verified_chain;
4715}
4716
4717IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
4718
4719#ifndef OPENSSL_NO_CT
4720
4721/*
4722 * Moves SCTs from the |src| stack to the |dst| stack.
4723 * The source of each SCT will be set to |origin|.
4724 * If |dst| points to a NULL pointer, a new stack will be created and owned by
4725 * the caller.
4726 * Returns the number of SCTs moved, or a negative integer if an error occurs.
4727 */
4728static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
4729 sct_source_t origin)
4730{
4731 int scts_moved = 0;
4732 SCT *sct = NULL;
4733
4734 if (*dst == NULL) {
4735 *dst = sk_SCT_new_null();
4736 if (*dst == NULL) {
4737 SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE);
4738 goto err;
4739 }
4740 }
4741
4742 while ((sct = sk_SCT_pop(src)) != NULL) {
4743 if (SCT_set_source(sct, origin) != 1)
4744 goto err;
4745
4746 if (sk_SCT_push(*dst, sct) <= 0)
4747 goto err;
4748 scts_moved += 1;
4749 }
4750
4751 return scts_moved;
4752 err:
4753 if (sct != NULL)
4754 sk_SCT_push(src, sct); /* Put the SCT back */
4755 return -1;
4756}
4757
4758/*
4759 * Look for data collected during ServerHello and parse if found.
4760 * Returns the number of SCTs extracted.
4761 */
4762static int ct_extract_tls_extension_scts(SSL *s)
4763{
4764 int scts_extracted = 0;
4765
4766 if (s->ext.scts != NULL) {
4767 const unsigned char *p = s->ext.scts;
4768 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
4769
4770 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
4771
4772 SCT_LIST_free(scts);
4773 }
4774
4775 return scts_extracted;
4776}
4777
4778/*
4779 * Checks for an OCSP response and then attempts to extract any SCTs found if it
4780 * contains an SCT X509 extension. They will be stored in |s->scts|.
4781 * Returns:
4782 * - The number of SCTs extracted, assuming an OCSP response exists.
4783 * - 0 if no OCSP response exists or it contains no SCTs.
4784 * - A negative integer if an error occurs.
4785 */
4786static int ct_extract_ocsp_response_scts(SSL *s)
4787{
4788# ifndef OPENSSL_NO_OCSP
4789 int scts_extracted = 0;
4790 const unsigned char *p;
4791 OCSP_BASICRESP *br = NULL;
4792 OCSP_RESPONSE *rsp = NULL;
4793 STACK_OF(SCT) *scts = NULL;
4794 int i;
4795
4796 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
4797 goto err;
4798
4799 p = s->ext.ocsp.resp;
4800 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
4801 if (rsp == NULL)
4802 goto err;
4803
4804 br = OCSP_response_get1_basic(rsp);
4805 if (br == NULL)
4806 goto err;
4807
4808 for (i = 0; i < OCSP_resp_count(br); ++i) {
4809 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
4810
4811 if (single == NULL)
4812 continue;
4813
4814 scts =
4815 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
4816 scts_extracted =
4817 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
4818 if (scts_extracted < 0)
4819 goto err;
4820 }
4821 err:
4822 SCT_LIST_free(scts);
4823 OCSP_BASICRESP_free(br);
4824 OCSP_RESPONSE_free(rsp);
4825 return scts_extracted;
4826# else
4827 /* Behave as if no OCSP response exists */
4828 return 0;
4829# endif
4830}
4831
4832/*
4833 * Attempts to extract SCTs from the peer certificate.
4834 * Return the number of SCTs extracted, or a negative integer if an error
4835 * occurs.
4836 */
4837static int ct_extract_x509v3_extension_scts(SSL *s)
4838{
4839 int scts_extracted = 0;
4840 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4841
4842 if (cert != NULL) {
4843 STACK_OF(SCT) *scts =
4844 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
4845
4846 scts_extracted =
4847 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
4848
4849 SCT_LIST_free(scts);
4850 }
4851
4852 return scts_extracted;
4853}
4854
4855/*
4856 * Attempts to find all received SCTs by checking TLS extensions, the OCSP
4857 * response (if it exists) and X509v3 extensions in the certificate.
4858 * Returns NULL if an error occurs.
4859 */
4860const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
4861{
4862 if (!s->scts_parsed) {
4863 if (ct_extract_tls_extension_scts(s) < 0 ||
4864 ct_extract_ocsp_response_scts(s) < 0 ||
4865 ct_extract_x509v3_extension_scts(s) < 0)
4866 goto err;
4867
4868 s->scts_parsed = 1;
4869 }
4870 return s->scts;
4871 err:
4872 return NULL;
4873}
4874
4875static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
4876 const STACK_OF(SCT) *scts, void *unused_arg)
4877{
4878 return 1;
4879}
4880
4881static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
4882 const STACK_OF(SCT) *scts, void *unused_arg)
4883{
4884 int count = scts != NULL ? sk_SCT_num(scts) : 0;
4885 int i;
4886
4887 for (i = 0; i < count; ++i) {
4888 SCT *sct = sk_SCT_value(scts, i);
4889 int status = SCT_get_validation_status(sct);
4890
4891 if (status == SCT_VALIDATION_STATUS_VALID)
4892 return 1;
4893 }
4894 SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS);
4895 return 0;
4896}
4897
4898int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
4899 void *arg)
4900{
4901 /*
4902 * Since code exists that uses the custom extension handler for CT, look
4903 * for this and throw an error if they have already registered to use CT.
4904 */
4905 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
4906 TLSEXT_TYPE_signed_certificate_timestamp))
4907 {
4908 SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK,
4909 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4910 return 0;
4911 }
4912
4913 if (callback != NULL) {
4914 /*
4915 * If we are validating CT, then we MUST accept SCTs served via OCSP
4916 */
4917 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
4918 return 0;
4919 }
4920
4921 s->ct_validation_callback = callback;
4922 s->ct_validation_callback_arg = arg;
4923
4924 return 1;
4925}
4926
4927int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
4928 ssl_ct_validation_cb callback, void *arg)
4929{
4930 /*
4931 * Since code exists that uses the custom extension handler for CT, look for
4932 * this and throw an error if they have already registered to use CT.
4933 */
4934 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
4935 TLSEXT_TYPE_signed_certificate_timestamp))
4936 {
4937 SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK,
4938 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4939 return 0;
4940 }
4941
4942 ctx->ct_validation_callback = callback;
4943 ctx->ct_validation_callback_arg = arg;
4944 return 1;
4945}
4946
4947int SSL_ct_is_enabled(const SSL *s)
4948{
4949 return s->ct_validation_callback != NULL;
4950}
4951
4952int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
4953{
4954 return ctx->ct_validation_callback != NULL;
4955}
4956
4957int ssl_validate_ct(SSL *s)
4958{
4959 int ret = 0;
4960 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4961 X509 *issuer;
4962 SSL_DANE *dane = &s->dane;
4963 CT_POLICY_EVAL_CTX *ctx = NULL;
4964 const STACK_OF(SCT) *scts;
4965
4966 /*
4967 * If no callback is set, the peer is anonymous, or its chain is invalid,
4968 * skip SCT validation - just return success. Applications that continue
4969 * handshakes without certificates, with unverified chains, or pinned leaf
4970 * certificates are outside the scope of the WebPKI and CT.
4971 *
4972 * The above exclusions notwithstanding the vast majority of peers will
4973 * have rather ordinary certificate chains validated by typical
4974 * applications that perform certificate verification and therefore will
4975 * process SCTs when enabled.
4976 */
4977 if (s->ct_validation_callback == NULL || cert == NULL ||
4978 s->verify_result != X509_V_OK ||
4979 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
4980 return 1;
4981
4982 /*
4983 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
4984 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2
4985 */
4986 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
4987 switch (dane->mtlsa->usage) {
4988 case DANETLS_USAGE_DANE_TA:
4989 case DANETLS_USAGE_DANE_EE:
4990 return 1;
4991 }
4992 }
4993
4994 ctx = CT_POLICY_EVAL_CTX_new();
4995 if (ctx == NULL) {
4996 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_VALIDATE_CT,
4997 ERR_R_MALLOC_FAILURE);
4998 goto end;
4999 }
5000
5001 issuer = sk_X509_value(s->verified_chain, 1);
5002 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
5003 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
5004 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store);
5005 CT_POLICY_EVAL_CTX_set_time(
5006 ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000);
5007
5008 scts = SSL_get0_peer_scts(s);
5009
5010 /*
5011 * This function returns success (> 0) only when all the SCTs are valid, 0
5012 * when some are invalid, and < 0 on various internal errors (out of
5013 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient
5014 * reason to abort the handshake, that decision is up to the callback.
5015 * Therefore, we error out only in the unexpected case that the return
5016 * value is negative.
5017 *
5018 * XXX: One might well argue that the return value of this function is an
5019 * unfortunate design choice. Its job is only to determine the validation
5020 * status of each of the provided SCTs. So long as it correctly separates
5021 * the wheat from the chaff it should return success. Failure in this case
5022 * ought to correspond to an inability to carry out its duties.
5023 */
5024 if (SCT_LIST_validate(scts, ctx) < 0) {
5025 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
5026 SSL_R_SCT_VERIFICATION_FAILED);
5027 goto end;
5028 }
5029
5030 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
5031 if (ret < 0)
5032 ret = 0; /* This function returns 0 on failure */
5033 if (!ret)
5034 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
5035 SSL_R_CALLBACK_FAILED);
5036
5037 end:
5038 CT_POLICY_EVAL_CTX_free(ctx);
5039 /*
5040 * With SSL_VERIFY_NONE the session may be cached and re-used despite a
5041 * failure return code here. Also the application may wish the complete
5042 * the handshake, and then disconnect cleanly at a higher layer, after
5043 * checking the verification status of the completed connection.
5044 *
5045 * We therefore force a certificate verification failure which will be
5046 * visible via SSL_get_verify_result() and cached as part of any resumed
5047 * session.
5048 *
5049 * Note: the permissive callback is for information gathering only, always
5050 * returns success, and does not affect verification status. Only the
5051 * strict callback or a custom application-specified callback can trigger
5052 * connection failure or record a verification error.
5053 */
5054 if (ret <= 0)
5055 s->verify_result = X509_V_ERR_NO_VALID_SCTS;
5056 return ret;
5057}
5058
5059int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
5060{
5061 switch (validation_mode) {
5062 default:
5063 SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
5064 return 0;
5065 case SSL_CT_VALIDATION_PERMISSIVE:
5066 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
5067 case SSL_CT_VALIDATION_STRICT:
5068 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
5069 }
5070}
5071
5072int SSL_enable_ct(SSL *s, int validation_mode)
5073{
5074 switch (validation_mode) {
5075 default:
5076 SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
5077 return 0;
5078 case SSL_CT_VALIDATION_PERMISSIVE:
5079 return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
5080 case SSL_CT_VALIDATION_STRICT:
5081 return SSL_set_ct_validation_callback(s, ct_strict, NULL);
5082 }
5083}
5084
5085int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
5086{
5087 return CTLOG_STORE_load_default_file(ctx->ctlog_store);
5088}
5089
5090int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
5091{
5092 return CTLOG_STORE_load_file(ctx->ctlog_store, path);
5093}
5094
5095void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
5096{
5097 CTLOG_STORE_free(ctx->ctlog_store);
5098 ctx->ctlog_store = logs;
5099}
5100
5101const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
5102{
5103 return ctx->ctlog_store;
5104}
5105
5106#endif /* OPENSSL_NO_CT */
5107
5108void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb,
5109 void *arg)
5110{
5111 c->client_hello_cb = cb;
5112 c->client_hello_cb_arg = arg;
5113}
5114
5115int SSL_client_hello_isv2(SSL *s)
5116{
5117 if (s->clienthello == NULL)
5118 return 0;
5119 return s->clienthello->isv2;
5120}
5121
5122unsigned int SSL_client_hello_get0_legacy_version(SSL *s)
5123{
5124 if (s->clienthello == NULL)
5125 return 0;
5126 return s->clienthello->legacy_version;
5127}
5128
5129size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out)
5130{
5131 if (s->clienthello == NULL)
5132 return 0;
5133 if (out != NULL)
5134 *out = s->clienthello->random;
5135 return SSL3_RANDOM_SIZE;
5136}
5137
5138size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out)
5139{
5140 if (s->clienthello == NULL)
5141 return 0;
5142 if (out != NULL)
5143 *out = s->clienthello->session_id;
5144 return s->clienthello->session_id_len;
5145}
5146
5147size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out)
5148{
5149 if (s->clienthello == NULL)
5150 return 0;
5151 if (out != NULL)
5152 *out = PACKET_data(&s->clienthello->ciphersuites);
5153 return PACKET_remaining(&s->clienthello->ciphersuites);
5154}
5155
5156size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out)
5157{
5158 if (s->clienthello == NULL)
5159 return 0;
5160 if (out != NULL)
5161 *out = s->clienthello->compressions;
5162 return s->clienthello->compressions_len;
5163}
5164
5165int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen)
5166{
5167 RAW_EXTENSION *ext;
5168 int *present;
5169 size_t num = 0, i;
5170
5171 if (s->clienthello == NULL || out == NULL || outlen == NULL)
5172 return 0;
5173 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
5174 ext = s->clienthello->pre_proc_exts + i;
5175 if (ext->present)
5176 num++;
5177 }
5178 if (num == 0) {
5179 *out = NULL;
5180 *outlen = 0;
5181 return 1;
5182 }
5183 if ((present = OPENSSL_malloc(sizeof(*present) * num)) == NULL) {
5184 SSLerr(SSL_F_SSL_CLIENT_HELLO_GET1_EXTENSIONS_PRESENT,
5185 ERR_R_MALLOC_FAILURE);
5186 return 0;
5187 }
5188 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
5189 ext = s->clienthello->pre_proc_exts + i;
5190 if (ext->present) {
5191 if (ext->received_order >= num)
5192 goto err;
5193 present[ext->received_order] = ext->type;
5194 }
5195 }
5196 *out = present;
5197 *outlen = num;
5198 return 1;
5199 err:
5200 OPENSSL_free(present);
5201 return 0;
5202}
5203
5204int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
5205 size_t *outlen)
5206{
5207 size_t i;
5208 RAW_EXTENSION *r;
5209
5210 if (s->clienthello == NULL)
5211 return 0;
5212 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) {
5213 r = s->clienthello->pre_proc_exts + i;
5214 if (r->present && r->type == type) {
5215 if (out != NULL)
5216 *out = PACKET_data(&r->data);
5217 if (outlen != NULL)
5218 *outlen = PACKET_remaining(&r->data);
5219 return 1;
5220 }
5221 }
5222 return 0;
5223}
5224
5225int SSL_free_buffers(SSL *ssl)
5226{
5227 RECORD_LAYER *rl = &ssl->rlayer;
5228
5229 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl))
5230 return 0;
5231
5232 RECORD_LAYER_release(rl);
5233 return 1;
5234}
5235
5236int SSL_alloc_buffers(SSL *ssl)
5237{
5238 return ssl3_setup_buffers(ssl);
5239}
5240
5241void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
5242{
5243 ctx->keylog_callback = cb;
5244}
5245
5246SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
5247{
5248 return ctx->keylog_callback;
5249}
5250
5251static int nss_keylog_int(const char *prefix,
5252 SSL *ssl,
5253 const uint8_t *parameter_1,
5254 size_t parameter_1_len,
5255 const uint8_t *parameter_2,
5256 size_t parameter_2_len)
5257{
5258 char *out = NULL;
5259 char *cursor = NULL;
5260 size_t out_len = 0;
5261 size_t i;
5262 size_t prefix_len;
5263
5264 if (ssl->ctx->keylog_callback == NULL)
5265 return 1;
5266
5267 /*
5268 * Our output buffer will contain the following strings, rendered with
5269 * space characters in between, terminated by a NULL character: first the
5270 * prefix, then the first parameter, then the second parameter. The
5271 * meaning of each parameter depends on the specific key material being
5272 * logged. Note that the first and second parameters are encoded in
5273 * hexadecimal, so we need a buffer that is twice their lengths.
5274 */
5275 prefix_len = strlen(prefix);
5276 out_len = prefix_len + (2 * parameter_1_len) + (2 * parameter_2_len) + 3;
5277 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
5278 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, SSL_F_NSS_KEYLOG_INT,
5279 ERR_R_MALLOC_FAILURE);
5280 return 0;
5281 }
5282
5283 strcpy(cursor, prefix);
5284 cursor += prefix_len;
5285 *cursor++ = ' ';
5286
5287 for (i = 0; i < parameter_1_len; i++) {
5288 sprintf(cursor, "%02x", parameter_1[i]);
5289 cursor += 2;
5290 }
5291 *cursor++ = ' ';
5292
5293 for (i = 0; i < parameter_2_len; i++) {
5294 sprintf(cursor, "%02x", parameter_2[i]);
5295 cursor += 2;
5296 }
5297 *cursor = '\0';
5298
5299 ssl->ctx->keylog_callback(ssl, (const char *)out);
5300 OPENSSL_clear_free(out, out_len);
5301 return 1;
5302
5303}
5304
5305int ssl_log_rsa_client_key_exchange(SSL *ssl,
5306 const uint8_t *encrypted_premaster,
5307 size_t encrypted_premaster_len,
5308 const uint8_t *premaster,
5309 size_t premaster_len)
5310{
5311 if (encrypted_premaster_len < 8) {
5312 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR,
5313 SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
5314 return 0;
5315 }
5316
5317 /* We only want the first 8 bytes of the encrypted premaster as a tag. */
5318 return nss_keylog_int("RSA",
5319 ssl,
5320 encrypted_premaster,
5321 8,
5322 premaster,
5323 premaster_len);
5324}
5325
5326int ssl_log_secret(SSL *ssl,
5327 const char *label,
5328 const uint8_t *secret,
5329 size_t secret_len)
5330{
5331 return nss_keylog_int(label,
5332 ssl,
5333 ssl->s3->client_random,
5334 SSL3_RANDOM_SIZE,
5335 secret,
5336 secret_len);
5337}
5338
5339#define SSLV2_CIPHER_LEN 3
5340
5341int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format)
5342{
5343 int n;
5344
5345 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5346
5347 if (PACKET_remaining(cipher_suites) == 0) {
5348 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_CACHE_CIPHERLIST,
5349 SSL_R_NO_CIPHERS_SPECIFIED);
5350 return 0;
5351 }
5352
5353 if (PACKET_remaining(cipher_suites) % n != 0) {
5354 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5355 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5356 return 0;
5357 }
5358
5359 OPENSSL_free(s->s3->tmp.ciphers_raw);
5360 s->s3->tmp.ciphers_raw = NULL;
5361 s->s3->tmp.ciphers_rawlen = 0;
5362
5363 if (sslv2format) {
5364 size_t numciphers = PACKET_remaining(cipher_suites) / n;
5365 PACKET sslv2ciphers = *cipher_suites;
5366 unsigned int leadbyte;
5367 unsigned char *raw;
5368
5369 /*
5370 * We store the raw ciphers list in SSLv3+ format so we need to do some
5371 * preprocessing to convert the list first. If there are any SSLv2 only
5372 * ciphersuites with a non-zero leading byte then we are going to
5373 * slightly over allocate because we won't store those. But that isn't a
5374 * problem.
5375 */
5376 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
5377 s->s3->tmp.ciphers_raw = raw;
5378 if (raw == NULL) {
5379 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5380 ERR_R_MALLOC_FAILURE);
5381 return 0;
5382 }
5383 for (s->s3->tmp.ciphers_rawlen = 0;
5384 PACKET_remaining(&sslv2ciphers) > 0;
5385 raw += TLS_CIPHER_LEN) {
5386 if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
5387 || (leadbyte == 0
5388 && !PACKET_copy_bytes(&sslv2ciphers, raw,
5389 TLS_CIPHER_LEN))
5390 || (leadbyte != 0
5391 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
5392 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5393 SSL_R_BAD_PACKET);
5394 OPENSSL_free(s->s3->tmp.ciphers_raw);
5395 s->s3->tmp.ciphers_raw = NULL;
5396 s->s3->tmp.ciphers_rawlen = 0;
5397 return 0;
5398 }
5399 if (leadbyte == 0)
5400 s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN;
5401 }
5402 } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
5403 &s->s3->tmp.ciphers_rawlen)) {
5404 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5405 ERR_R_INTERNAL_ERROR);
5406 return 0;
5407 }
5408 return 1;
5409}
5410
5411int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
5412 int isv2format, STACK_OF(SSL_CIPHER) **sk,
5413 STACK_OF(SSL_CIPHER) **scsvs)
5414{
5415 PACKET pkt;
5416
5417 if (!PACKET_buf_init(&pkt, bytes, len))
5418 return 0;
5419 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0);
5420}
5421
5422int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
5423 STACK_OF(SSL_CIPHER) **skp,
5424 STACK_OF(SSL_CIPHER) **scsvs_out,
5425 int sslv2format, int fatal)
5426{
5427 const SSL_CIPHER *c;
5428 STACK_OF(SSL_CIPHER) *sk = NULL;
5429 STACK_OF(SSL_CIPHER) *scsvs = NULL;
5430 int n;
5431 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
5432 unsigned char cipher[SSLV2_CIPHER_LEN];
5433
5434 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5435
5436 if (PACKET_remaining(cipher_suites) == 0) {
5437 if (fatal)
5438 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_BYTES_TO_CIPHER_LIST,
5439 SSL_R_NO_CIPHERS_SPECIFIED);
5440 else
5441 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
5442 return 0;
5443 }
5444
5445 if (PACKET_remaining(cipher_suites) % n != 0) {
5446 if (fatal)
5447 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5448 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5449 else
5450 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST,
5451 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5452 return 0;
5453 }
5454
5455 sk = sk_SSL_CIPHER_new_null();
5456 scsvs = sk_SSL_CIPHER_new_null();
5457 if (sk == NULL || scsvs == NULL) {
5458 if (fatal)
5459 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5460 ERR_R_MALLOC_FAILURE);
5461 else
5462 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5463 goto err;
5464 }
5465
5466 while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
5467 /*
5468 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
5469 * first byte set to zero, while true SSLv2 ciphers have a non-zero
5470 * first byte. We don't support any true SSLv2 ciphers, so skip them.
5471 */
5472 if (sslv2format && cipher[0] != '\0')
5473 continue;
5474
5475 /* For SSLv2-compat, ignore leading 0-byte. */
5476 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
5477 if (c != NULL) {
5478 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
5479 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
5480 if (fatal)
5481 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
5482 SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5483 else
5484 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5485 goto err;
5486 }
5487 }
5488 }
5489 if (PACKET_remaining(cipher_suites) > 0) {
5490 if (fatal)
5491 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5492 SSL_R_BAD_LENGTH);
5493 else
5494 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH);
5495 goto err;
5496 }
5497
5498 if (skp != NULL)
5499 *skp = sk;
5500 else
5501 sk_SSL_CIPHER_free(sk);
5502 if (scsvs_out != NULL)
5503 *scsvs_out = scsvs;
5504 else
5505 sk_SSL_CIPHER_free(scsvs);
5506 return 1;
5507 err:
5508 sk_SSL_CIPHER_free(sk);
5509 sk_SSL_CIPHER_free(scsvs);
5510 return 0;
5511}
5512
5513int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
5514{
5515 ctx->max_early_data = max_early_data;
5516
5517 return 1;
5518}
5519
5520uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
5521{
5522 return ctx->max_early_data;
5523}
5524
5525int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
5526{
5527 s->max_early_data = max_early_data;
5528
5529 return 1;
5530}
5531
5532uint32_t SSL_get_max_early_data(const SSL *s)
5533{
5534 return s->max_early_data;
5535}
5536
5537int SSL_CTX_set_recv_max_early_data(SSL_CTX *ctx, uint32_t recv_max_early_data)
5538{
5539 ctx->recv_max_early_data = recv_max_early_data;
5540
5541 return 1;
5542}
5543
5544uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX *ctx)
5545{
5546 return ctx->recv_max_early_data;
5547}
5548
5549int SSL_set_recv_max_early_data(SSL *s, uint32_t recv_max_early_data)
5550{
5551 s->recv_max_early_data = recv_max_early_data;
5552
5553 return 1;
5554}
5555
5556uint32_t SSL_get_recv_max_early_data(const SSL *s)
5557{
5558 return s->recv_max_early_data;
5559}
5560
5561__owur unsigned int ssl_get_max_send_fragment(const SSL *ssl)
5562{
5563 /* Return any active Max Fragment Len extension */
5564 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session))
5565 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5566
5567 /* return current SSL connection setting */
5568 return ssl->max_send_fragment;
5569}
5570
5571__owur unsigned int ssl_get_split_send_fragment(const SSL *ssl)
5572{
5573 /* Return a value regarding an active Max Fragment Len extension */
5574 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)
5575 && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session))
5576 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5577
5578 /* else limit |split_send_fragment| to current |max_send_fragment| */
5579 if (ssl->split_send_fragment > ssl->max_send_fragment)
5580 return ssl->max_send_fragment;
5581
5582 /* return current SSL connection setting */
5583 return ssl->split_send_fragment;
5584}
5585
5586int SSL_stateless(SSL *s)
5587{
5588 int ret;
5589
5590 /* Ensure there is no state left over from a previous invocation */
5591 if (!SSL_clear(s))
5592 return 0;
5593
5594 ERR_clear_error();
5595
5596 s->s3->flags |= TLS1_FLAGS_STATELESS;
5597 ret = SSL_accept(s);
5598 s->s3->flags &= ~TLS1_FLAGS_STATELESS;
5599
5600 if (ret > 0 && s->ext.cookieok)
5601 return 1;
5602
5603 if (s->hello_retry_request == SSL_HRR_PENDING && !ossl_statem_in_error(s))
5604 return 0;
5605
5606 return -1;
5607}
5608
5609void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val)
5610{
5611 ctx->pha_enabled = val;
5612}
5613
5614void SSL_set_post_handshake_auth(SSL *ssl, int val)
5615{
5616 ssl->pha_enabled = val;
5617}
5618
5619int SSL_verify_client_post_handshake(SSL *ssl)
5620{
5621 if (!SSL_IS_TLS13(ssl)) {
5622 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_WRONG_SSL_VERSION);
5623 return 0;
5624 }
5625 if (!ssl->server) {
5626 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_NOT_SERVER);
5627 return 0;
5628 }
5629
5630 if (!SSL_is_init_finished(ssl)) {
5631 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_STILL_IN_INIT);
5632 return 0;
5633 }
5634
5635 switch (ssl->post_handshake_auth) {
5636 case SSL_PHA_NONE:
5637 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_EXTENSION_NOT_RECEIVED);
5638 return 0;
5639 default:
5640 case SSL_PHA_EXT_SENT:
5641 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, ERR_R_INTERNAL_ERROR);
5642 return 0;
5643 case SSL_PHA_EXT_RECEIVED:
5644 break;
5645 case SSL_PHA_REQUEST_PENDING:
5646 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_PENDING);
5647 return 0;
5648 case SSL_PHA_REQUESTED:
5649 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_SENT);
5650 return 0;
5651 }
5652
5653 ssl->post_handshake_auth = SSL_PHA_REQUEST_PENDING;
5654
5655 /* checks verify_mode and algorithm_auth */
5656 if (!send_certificate_request(ssl)) {
5657 ssl->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */
5658 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_INVALID_CONFIG);
5659 return 0;
5660 }
5661
5662 ossl_statem_set_in_init(ssl, 1);
5663 return 1;
5664}
5665
5666int SSL_CTX_set_session_ticket_cb(SSL_CTX *ctx,
5667 SSL_CTX_generate_session_ticket_fn gen_cb,
5668 SSL_CTX_decrypt_session_ticket_fn dec_cb,
5669 void *arg)
5670{
5671 ctx->generate_ticket_cb = gen_cb;
5672 ctx->decrypt_ticket_cb = dec_cb;
5673 ctx->ticket_cb_data = arg;
5674 return 1;
5675}
5676
5677void SSL_CTX_set_allow_early_data_cb(SSL_CTX *ctx,
5678 SSL_allow_early_data_cb_fn cb,
5679 void *arg)
5680{
5681 ctx->allow_early_data_cb = cb;
5682 ctx->allow_early_data_cb_data = arg;
5683}
5684
5685void SSL_set_allow_early_data_cb(SSL *s,
5686 SSL_allow_early_data_cb_fn cb,
5687 void *arg)
5688{
5689 s->allow_early_data_cb = cb;
5690 s->allow_early_data_cb_data = arg;
5691}
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