1 /*
2 * Copyright 1995-2022 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 Apache License 2.0 (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 "internal/e_os.h"
15 #include <openssl/objects.h>
16 #include <openssl/x509v3.h>
17 #include <openssl/rand.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 <openssl/trace.h>
24 #include <openssl/core_names.h>
25 #include "internal/cryptlib.h"
26 #include "internal/refcount.h"
27 #include "internal/ktls.h"
28
ssl_undefined_function_1(SSL_CONNECTION * sc,SSL3_RECORD * r,size_t s,int t,SSL_MAC_BUF * mac,size_t macsize)29 static int ssl_undefined_function_1(SSL_CONNECTION *sc, SSL3_RECORD *r, size_t s,
30 int t, SSL_MAC_BUF *mac, size_t macsize)
31 {
32 return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
33 }
34
ssl_undefined_function_2(SSL_CONNECTION * sc,SSL3_RECORD * r,unsigned char * s,int t)35 static int ssl_undefined_function_2(SSL_CONNECTION *sc, SSL3_RECORD *r,
36 unsigned char *s, int t)
37 {
38 return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
39 }
40
ssl_undefined_function_3(SSL_CONNECTION * sc,unsigned char * r,unsigned char * s,size_t t,size_t * u)41 static int ssl_undefined_function_3(SSL_CONNECTION *sc, unsigned char *r,
42 unsigned char *s, size_t t, size_t *u)
43 {
44 return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
45 }
46
ssl_undefined_function_4(SSL_CONNECTION * sc,int r)47 static int ssl_undefined_function_4(SSL_CONNECTION *sc, int r)
48 {
49 return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
50 }
51
ssl_undefined_function_5(SSL_CONNECTION * sc,const char * r,size_t s,unsigned char * t)52 static size_t ssl_undefined_function_5(SSL_CONNECTION *sc, const char *r,
53 size_t s, unsigned char *t)
54 {
55 return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
56 }
57
ssl_undefined_function_6(int r)58 static int ssl_undefined_function_6(int r)
59 {
60 return ssl_undefined_function(NULL);
61 }
62
ssl_undefined_function_7(SSL_CONNECTION * sc,unsigned char * r,size_t s,const char * t,size_t u,const unsigned char * v,size_t w,int x)63 static int ssl_undefined_function_7(SSL_CONNECTION *sc, unsigned char *r,
64 size_t s, const char *t, size_t u,
65 const unsigned char *v, size_t w, int x)
66 {
67 return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
68 }
69
ssl_undefined_function_8(SSL_CONNECTION * sc)70 static int ssl_undefined_function_8(SSL_CONNECTION *sc)
71 {
72 return ssl_undefined_function(SSL_CONNECTION_GET_SSL(sc));
73 }
74
75 SSL3_ENC_METHOD ssl3_undef_enc_method = {
76 ssl_undefined_function_1,
77 ssl_undefined_function_2,
78 ssl_undefined_function_8,
79 ssl_undefined_function_3,
80 ssl_undefined_function_4,
81 ssl_undefined_function_5,
82 NULL, /* client_finished_label */
83 0, /* client_finished_label_len */
84 NULL, /* server_finished_label */
85 0, /* server_finished_label_len */
86 ssl_undefined_function_6,
87 ssl_undefined_function_7,
88 };
89
90 struct ssl_async_args {
91 SSL *s;
92 void *buf;
93 size_t num;
94 enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
95 union {
96 int (*func_read) (SSL *, void *, size_t, size_t *);
97 int (*func_write) (SSL *, const void *, size_t, size_t *);
98 int (*func_other) (SSL *);
99 } f;
100 };
101
102 static const struct {
103 uint8_t mtype;
104 uint8_t ord;
105 int nid;
106 } dane_mds[] = {
107 {
108 DANETLS_MATCHING_FULL, 0, NID_undef
109 },
110 {
111 DANETLS_MATCHING_2256, 1, NID_sha256
112 },
113 {
114 DANETLS_MATCHING_2512, 2, NID_sha512
115 },
116 };
117
dane_ctx_enable(struct dane_ctx_st * dctx)118 static int dane_ctx_enable(struct dane_ctx_st *dctx)
119 {
120 const EVP_MD **mdevp;
121 uint8_t *mdord;
122 uint8_t mdmax = DANETLS_MATCHING_LAST;
123 int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */
124 size_t i;
125
126 if (dctx->mdevp != NULL)
127 return 1;
128
129 mdevp = OPENSSL_zalloc(n * sizeof(*mdevp));
130 mdord = OPENSSL_zalloc(n * sizeof(*mdord));
131
132 if (mdord == NULL || mdevp == NULL) {
133 OPENSSL_free(mdord);
134 OPENSSL_free(mdevp);
135 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
136 return 0;
137 }
138
139 /* Install default entries */
140 for (i = 0; i < OSSL_NELEM(dane_mds); ++i) {
141 const EVP_MD *md;
142
143 if (dane_mds[i].nid == NID_undef ||
144 (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL)
145 continue;
146 mdevp[dane_mds[i].mtype] = md;
147 mdord[dane_mds[i].mtype] = dane_mds[i].ord;
148 }
149
150 dctx->mdevp = mdevp;
151 dctx->mdord = mdord;
152 dctx->mdmax = mdmax;
153
154 return 1;
155 }
156
dane_ctx_final(struct dane_ctx_st * dctx)157 static void dane_ctx_final(struct dane_ctx_st *dctx)
158 {
159 OPENSSL_free(dctx->mdevp);
160 dctx->mdevp = NULL;
161
162 OPENSSL_free(dctx->mdord);
163 dctx->mdord = NULL;
164 dctx->mdmax = 0;
165 }
166
tlsa_free(danetls_record * t)167 static void tlsa_free(danetls_record *t)
168 {
169 if (t == NULL)
170 return;
171 OPENSSL_free(t->data);
172 EVP_PKEY_free(t->spki);
173 OPENSSL_free(t);
174 }
175
dane_final(SSL_DANE * dane)176 static void dane_final(SSL_DANE *dane)
177 {
178 sk_danetls_record_pop_free(dane->trecs, tlsa_free);
179 dane->trecs = NULL;
180
181 OSSL_STACK_OF_X509_free(dane->certs);
182 dane->certs = NULL;
183
184 X509_free(dane->mcert);
185 dane->mcert = NULL;
186 dane->mtlsa = NULL;
187 dane->mdpth = -1;
188 dane->pdpth = -1;
189 }
190
191 /*
192 * dane_copy - Copy dane configuration, sans verification state.
193 */
ssl_dane_dup(SSL_CONNECTION * to,SSL_CONNECTION * from)194 static int ssl_dane_dup(SSL_CONNECTION *to, SSL_CONNECTION *from)
195 {
196 int num;
197 int i;
198
199 if (!DANETLS_ENABLED(&from->dane))
200 return 1;
201
202 num = sk_danetls_record_num(from->dane.trecs);
203 dane_final(&to->dane);
204 to->dane.flags = from->dane.flags;
205 to->dane.dctx = &SSL_CONNECTION_GET_CTX(to)->dane;
206 to->dane.trecs = sk_danetls_record_new_reserve(NULL, num);
207
208 if (to->dane.trecs == NULL) {
209 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
210 return 0;
211 }
212
213 for (i = 0; i < num; ++i) {
214 danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
215
216 if (SSL_dane_tlsa_add(SSL_CONNECTION_GET_SSL(to), t->usage,
217 t->selector, t->mtype, t->data, t->dlen) <= 0)
218 return 0;
219 }
220 return 1;
221 }
222
dane_mtype_set(struct dane_ctx_st * dctx,const EVP_MD * md,uint8_t mtype,uint8_t ord)223 static int dane_mtype_set(struct dane_ctx_st *dctx,
224 const EVP_MD *md, uint8_t mtype, uint8_t ord)
225 {
226 int i;
227
228 if (mtype == DANETLS_MATCHING_FULL && md != NULL) {
229 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL);
230 return 0;
231 }
232
233 if (mtype > dctx->mdmax) {
234 const EVP_MD **mdevp;
235 uint8_t *mdord;
236 int n = ((int)mtype) + 1;
237
238 mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp));
239 if (mdevp == NULL) {
240 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
241 return -1;
242 }
243 dctx->mdevp = mdevp;
244
245 mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
246 if (mdord == NULL) {
247 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
248 return -1;
249 }
250 dctx->mdord = mdord;
251
252 /* Zero-fill any gaps */
253 for (i = dctx->mdmax + 1; i < mtype; ++i) {
254 mdevp[i] = NULL;
255 mdord[i] = 0;
256 }
257
258 dctx->mdmax = mtype;
259 }
260
261 dctx->mdevp[mtype] = md;
262 /* Coerce ordinal of disabled matching types to 0 */
263 dctx->mdord[mtype] = (md == NULL) ? 0 : ord;
264
265 return 1;
266 }
267
tlsa_md_get(SSL_DANE * dane,uint8_t mtype)268 static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype)
269 {
270 if (mtype > dane->dctx->mdmax)
271 return NULL;
272 return dane->dctx->mdevp[mtype];
273 }
274
dane_tlsa_add(SSL_DANE * dane,uint8_t usage,uint8_t selector,uint8_t mtype,const unsigned char * data,size_t dlen)275 static int dane_tlsa_add(SSL_DANE *dane,
276 uint8_t usage,
277 uint8_t selector,
278 uint8_t mtype, const unsigned char *data, size_t dlen)
279 {
280 danetls_record *t;
281 const EVP_MD *md = NULL;
282 int ilen = (int)dlen;
283 int i;
284 int num;
285
286 if (dane->trecs == NULL) {
287 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_NOT_ENABLED);
288 return -1;
289 }
290
291 if (ilen < 0 || dlen != (size_t)ilen) {
292 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
293 return 0;
294 }
295
296 if (usage > DANETLS_USAGE_LAST) {
297 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
298 return 0;
299 }
300
301 if (selector > DANETLS_SELECTOR_LAST) {
302 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_SELECTOR);
303 return 0;
304 }
305
306 if (mtype != DANETLS_MATCHING_FULL) {
307 md = tlsa_md_get(dane, mtype);
308 if (md == NULL) {
309 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
310 return 0;
311 }
312 }
313
314 if (md != NULL && dlen != (size_t)EVP_MD_get_size(md)) {
315 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
316 return 0;
317 }
318 if (!data) {
319 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_NULL_DATA);
320 return 0;
321 }
322
323 if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) {
324 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
325 return -1;
326 }
327
328 t->usage = usage;
329 t->selector = selector;
330 t->mtype = mtype;
331 t->data = OPENSSL_malloc(dlen);
332 if (t->data == NULL) {
333 tlsa_free(t);
334 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
335 return -1;
336 }
337 memcpy(t->data, data, dlen);
338 t->dlen = dlen;
339
340 /* Validate and cache full certificate or public key */
341 if (mtype == DANETLS_MATCHING_FULL) {
342 const unsigned char *p = data;
343 X509 *cert = NULL;
344 EVP_PKEY *pkey = NULL;
345
346 switch (selector) {
347 case DANETLS_SELECTOR_CERT:
348 if (!d2i_X509(&cert, &p, ilen) || p < data ||
349 dlen != (size_t)(p - data)) {
350 tlsa_free(t);
351 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
352 return 0;
353 }
354 if (X509_get0_pubkey(cert) == NULL) {
355 tlsa_free(t);
356 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
357 return 0;
358 }
359
360 if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) {
361 X509_free(cert);
362 break;
363 }
364
365 /*
366 * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA
367 * records that contain full certificates of trust-anchors that are
368 * not present in the wire chain. For usage PKIX-TA(0), we augment
369 * the chain with untrusted Full(0) certificates from DNS, in case
370 * they are missing from the chain.
371 */
372 if ((dane->certs == NULL &&
373 (dane->certs = sk_X509_new_null()) == NULL) ||
374 !sk_X509_push(dane->certs, cert)) {
375 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
376 X509_free(cert);
377 tlsa_free(t);
378 return -1;
379 }
380 break;
381
382 case DANETLS_SELECTOR_SPKI:
383 if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
384 dlen != (size_t)(p - data)) {
385 tlsa_free(t);
386 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
387 return 0;
388 }
389
390 /*
391 * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA
392 * records that contain full bare keys of trust-anchors that are
393 * not present in the wire chain.
394 */
395 if (usage == DANETLS_USAGE_DANE_TA)
396 t->spki = pkey;
397 else
398 EVP_PKEY_free(pkey);
399 break;
400 }
401 }
402
403 /*-
404 * Find the right insertion point for the new record.
405 *
406 * See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that
407 * they can be processed first, as they require no chain building, and no
408 * expiration or hostname checks. Because DANE-EE(3) is numerically
409 * largest, this is accomplished via descending sort by "usage".
410 *
411 * We also sort in descending order by matching ordinal to simplify
412 * the implementation of digest agility in the verification code.
413 *
414 * The choice of order for the selector is not significant, so we
415 * use the same descending order for consistency.
416 */
417 num = sk_danetls_record_num(dane->trecs);
418 for (i = 0; i < num; ++i) {
419 danetls_record *rec = sk_danetls_record_value(dane->trecs, i);
420
421 if (rec->usage > usage)
422 continue;
423 if (rec->usage < usage)
424 break;
425 if (rec->selector > selector)
426 continue;
427 if (rec->selector < selector)
428 break;
429 if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype])
430 continue;
431 break;
432 }
433
434 if (!sk_danetls_record_insert(dane->trecs, t, i)) {
435 tlsa_free(t);
436 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
437 return -1;
438 }
439 dane->umask |= DANETLS_USAGE_BIT(usage);
440
441 return 1;
442 }
443
444 /*
445 * Return 0 if there is only one version configured and it was disabled
446 * at configure time. Return 1 otherwise.
447 */
ssl_check_allowed_versions(int min_version,int max_version)448 static int ssl_check_allowed_versions(int min_version, int max_version)
449 {
450 int minisdtls = 0, maxisdtls = 0;
451
452 /* Figure out if we're doing DTLS versions or TLS versions */
453 if (min_version == DTLS1_BAD_VER
454 || min_version >> 8 == DTLS1_VERSION_MAJOR)
455 minisdtls = 1;
456 if (max_version == DTLS1_BAD_VER
457 || max_version >> 8 == DTLS1_VERSION_MAJOR)
458 maxisdtls = 1;
459 /* A wildcard version of 0 could be DTLS or TLS. */
460 if ((minisdtls && !maxisdtls && max_version != 0)
461 || (maxisdtls && !minisdtls && min_version != 0)) {
462 /* Mixing DTLS and TLS versions will lead to sadness; deny it. */
463 return 0;
464 }
465
466 if (minisdtls || maxisdtls) {
467 /* Do DTLS version checks. */
468 if (min_version == 0)
469 /* Ignore DTLS1_BAD_VER */
470 min_version = DTLS1_VERSION;
471 if (max_version == 0)
472 max_version = DTLS1_2_VERSION;
473 #ifdef OPENSSL_NO_DTLS1_2
474 if (max_version == DTLS1_2_VERSION)
475 max_version = DTLS1_VERSION;
476 #endif
477 #ifdef OPENSSL_NO_DTLS1
478 if (min_version == DTLS1_VERSION)
479 min_version = DTLS1_2_VERSION;
480 #endif
481 /* Done massaging versions; do the check. */
482 if (0
483 #ifdef OPENSSL_NO_DTLS1
484 || (DTLS_VERSION_GE(min_version, DTLS1_VERSION)
485 && DTLS_VERSION_GE(DTLS1_VERSION, max_version))
486 #endif
487 #ifdef OPENSSL_NO_DTLS1_2
488 || (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION)
489 && DTLS_VERSION_GE(DTLS1_2_VERSION, max_version))
490 #endif
491 )
492 return 0;
493 } else {
494 /* Regular TLS version checks. */
495 if (min_version == 0)
496 min_version = SSL3_VERSION;
497 if (max_version == 0)
498 max_version = TLS1_3_VERSION;
499 #ifdef OPENSSL_NO_TLS1_3
500 if (max_version == TLS1_3_VERSION)
501 max_version = TLS1_2_VERSION;
502 #endif
503 #ifdef OPENSSL_NO_TLS1_2
504 if (max_version == TLS1_2_VERSION)
505 max_version = TLS1_1_VERSION;
506 #endif
507 #ifdef OPENSSL_NO_TLS1_1
508 if (max_version == TLS1_1_VERSION)
509 max_version = TLS1_VERSION;
510 #endif
511 #ifdef OPENSSL_NO_TLS1
512 if (max_version == TLS1_VERSION)
513 max_version = SSL3_VERSION;
514 #endif
515 #ifdef OPENSSL_NO_SSL3
516 if (min_version == SSL3_VERSION)
517 min_version = TLS1_VERSION;
518 #endif
519 #ifdef OPENSSL_NO_TLS1
520 if (min_version == TLS1_VERSION)
521 min_version = TLS1_1_VERSION;
522 #endif
523 #ifdef OPENSSL_NO_TLS1_1
524 if (min_version == TLS1_1_VERSION)
525 min_version = TLS1_2_VERSION;
526 #endif
527 #ifdef OPENSSL_NO_TLS1_2
528 if (min_version == TLS1_2_VERSION)
529 min_version = TLS1_3_VERSION;
530 #endif
531 /* Done massaging versions; do the check. */
532 if (0
533 #ifdef OPENSSL_NO_SSL3
534 || (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version)
535 #endif
536 #ifdef OPENSSL_NO_TLS1
537 || (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version)
538 #endif
539 #ifdef OPENSSL_NO_TLS1_1
540 || (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version)
541 #endif
542 #ifdef OPENSSL_NO_TLS1_2
543 || (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version)
544 #endif
545 #ifdef OPENSSL_NO_TLS1_3
546 || (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version)
547 #endif
548 )
549 return 0;
550 }
551 return 1;
552 }
553
554 #if defined(__TANDEM) && defined(OPENSSL_VPROC)
555 /*
556 * Define a VPROC function for HP NonStop build ssl library.
557 * This is used by platform version identification tools.
558 * Do not inline this procedure or make it static.
559 */
560 # define OPENSSL_VPROC_STRING_(x) x##_SSL
561 # define OPENSSL_VPROC_STRING(x) OPENSSL_VPROC_STRING_(x)
562 # define OPENSSL_VPROC_FUNC OPENSSL_VPROC_STRING(OPENSSL_VPROC)
OPENSSL_VPROC_FUNC(void)563 void OPENSSL_VPROC_FUNC(void) {}
564 #endif
565
566
clear_ciphers(SSL_CONNECTION * s)567 static void clear_ciphers(SSL_CONNECTION *s)
568 {
569 /* clear the current cipher */
570 ssl_clear_cipher_ctx(s);
571 ssl_clear_hash_ctx(&s->read_hash);
572 ssl_clear_hash_ctx(&s->write_hash);
573 }
574
SSL_clear(SSL * s)575 int SSL_clear(SSL *s)
576 {
577 if (s->method == NULL) {
578 ERR_raise(ERR_LIB_SSL, SSL_R_NO_METHOD_SPECIFIED);
579 return 0;
580 }
581
582 return s->method->ssl_reset(s);
583 }
584
ossl_ssl_connection_reset(SSL * s)585 int ossl_ssl_connection_reset(SSL *s)
586 {
587 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
588
589 if (sc == NULL)
590 return 0;
591
592 if (ssl_clear_bad_session(sc)) {
593 SSL_SESSION_free(sc->session);
594 sc->session = NULL;
595 }
596 SSL_SESSION_free(sc->psksession);
597 sc->psksession = NULL;
598 OPENSSL_free(sc->psksession_id);
599 sc->psksession_id = NULL;
600 sc->psksession_id_len = 0;
601 sc->hello_retry_request = 0;
602 sc->sent_tickets = 0;
603
604 sc->error = 0;
605 sc->hit = 0;
606 sc->shutdown = 0;
607
608 if (sc->renegotiate) {
609 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
610 return 0;
611 }
612
613 ossl_statem_clear(sc);
614
615 /* TODO(QUIC): Version handling not yet clear */
616 sc->version = s->method->version;
617 sc->client_version = sc->version;
618 sc->rwstate = SSL_NOTHING;
619
620 BUF_MEM_free(sc->init_buf);
621 sc->init_buf = NULL;
622 clear_ciphers(sc);
623 sc->first_packet = 0;
624
625 sc->key_update = SSL_KEY_UPDATE_NONE;
626
627 EVP_MD_CTX_free(sc->pha_dgst);
628 sc->pha_dgst = NULL;
629
630 /* Reset DANE verification result state */
631 sc->dane.mdpth = -1;
632 sc->dane.pdpth = -1;
633 X509_free(sc->dane.mcert);
634 sc->dane.mcert = NULL;
635 sc->dane.mtlsa = NULL;
636
637 /* Clear the verification result peername */
638 X509_VERIFY_PARAM_move_peername(sc->param, NULL);
639
640 /* Clear any shared connection state */
641 OPENSSL_free(sc->shared_sigalgs);
642 sc->shared_sigalgs = NULL;
643 sc->shared_sigalgslen = 0;
644
645 /*
646 * Check to see if we were changed into a different method, if so, revert
647 * back.
648 */
649 if (s->method != SSL_CONNECTION_GET_CTX(sc)->method) {
650 s->method->ssl_deinit(s);
651 s->method = SSL_CONNECTION_GET_CTX(sc)->method;
652 if (!s->method->ssl_init(s))
653 return 0;
654 } else {
655 if (!s->method->ssl_clear(s))
656 return 0;
657 }
658
659 RECORD_LAYER_clear(&sc->rlayer);
660 BIO_free(sc->rlayer.rrlnext);
661 sc->rlayer.rrlnext = NULL;
662
663 if (!ssl_set_new_record_layer(sc,
664 SSL_CONNECTION_IS_DTLS(sc) ? DTLS_ANY_VERSION : TLS_ANY_VERSION,
665 OSSL_RECORD_DIRECTION_READ,
666 OSSL_RECORD_PROTECTION_LEVEL_NONE,
667 NULL, 0, NULL, 0, NULL, 0, NULL, 0,
668 NID_undef, NULL, NULL)) {
669 /* SSLfatal already called */
670 return 0;
671 }
672
673 return 1;
674 }
675
676 #ifndef OPENSSL_NO_DEPRECATED_3_0
677 /** Used to change an SSL_CTXs default SSL method type */
SSL_CTX_set_ssl_version(SSL_CTX * ctx,const SSL_METHOD * meth)678 int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
679 {
680 STACK_OF(SSL_CIPHER) *sk;
681
682 ctx->method = meth;
683
684 if (!SSL_CTX_set_ciphersuites(ctx, OSSL_default_ciphersuites())) {
685 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
686 return 0;
687 }
688 sk = ssl_create_cipher_list(ctx,
689 ctx->tls13_ciphersuites,
690 &(ctx->cipher_list),
691 &(ctx->cipher_list_by_id),
692 OSSL_default_cipher_list(), ctx->cert);
693 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
694 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
695 return 0;
696 }
697 return 1;
698 }
699 #endif
700
SSL_new(SSL_CTX * ctx)701 SSL *SSL_new(SSL_CTX *ctx)
702 {
703 if (ctx == NULL) {
704 ERR_raise(ERR_LIB_SSL, SSL_R_NULL_SSL_CTX);
705 return NULL;
706 }
707 if (ctx->method == NULL) {
708 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
709 return NULL;
710 }
711 return ctx->method->ssl_new(ctx);
712 }
713
ossl_ssl_init(SSL * ssl,SSL_CTX * ctx,int type)714 int ossl_ssl_init(SSL *ssl, SSL_CTX *ctx, int type)
715 {
716 ssl->type = type;
717
718 ssl->references = 1;
719 ssl->lock = CRYPTO_THREAD_lock_new();
720 if (ssl->lock == NULL)
721 return 0;
722
723 SSL_CTX_up_ref(ctx);
724 ssl->ctx = ctx;
725
726 ssl->method = ctx->method;
727
728 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, ssl, &ssl->ex_data))
729 return 0;
730
731 return 1;
732 }
733
ossl_ssl_connection_new(SSL_CTX * ctx)734 SSL *ossl_ssl_connection_new(SSL_CTX *ctx)
735 {
736 SSL_CONNECTION *s;
737 SSL *ssl;
738
739 s = OPENSSL_zalloc(sizeof(*s));
740 if (s == NULL)
741 return NULL;
742
743 ssl = &s->ssl;
744 if (!ossl_ssl_init(ssl, ctx, SSL_TYPE_SSL_CONNECTION)) {
745 OPENSSL_free(s);
746 s = NULL;
747 goto err;
748 }
749
750 #ifndef OPENSSL_NO_QUIC
751 /* set the parent (user visible) ssl to self */
752 s->user_ssl = ssl;
753 #endif
754
755 RECORD_LAYER_init(&s->rlayer, s);
756
757 s->options = ctx->options;
758 s->dane.flags = ctx->dane.flags;
759 s->min_proto_version = ctx->min_proto_version;
760 s->max_proto_version = ctx->max_proto_version;
761 s->mode = ctx->mode;
762 s->max_cert_list = ctx->max_cert_list;
763 s->max_early_data = ctx->max_early_data;
764 s->recv_max_early_data = ctx->recv_max_early_data;
765 s->num_tickets = ctx->num_tickets;
766 s->pha_enabled = ctx->pha_enabled;
767
768 /* Shallow copy of the ciphersuites stack */
769 s->tls13_ciphersuites = sk_SSL_CIPHER_dup(ctx->tls13_ciphersuites);
770 if (s->tls13_ciphersuites == NULL)
771 goto err;
772
773 /*
774 * Earlier library versions used to copy the pointer to the CERT, not
775 * its contents; only when setting new parameters for the per-SSL
776 * copy, ssl_cert_new would be called (and the direct reference to
777 * the per-SSL_CTX settings would be lost, but those still were
778 * indirectly accessed for various purposes, and for that reason they
779 * used to be known as s->ctx->default_cert). Now we don't look at the
780 * SSL_CTX's CERT after having duplicated it once.
781 */
782 s->cert = ssl_cert_dup(ctx->cert);
783 if (s->cert == NULL)
784 goto err;
785
786 RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
787 s->msg_callback = ctx->msg_callback;
788 s->msg_callback_arg = ctx->msg_callback_arg;
789 s->verify_mode = ctx->verify_mode;
790 s->not_resumable_session_cb = ctx->not_resumable_session_cb;
791 s->record_padding_cb = ctx->record_padding_cb;
792 s->record_padding_arg = ctx->record_padding_arg;
793 s->block_padding = ctx->block_padding;
794 s->sid_ctx_length = ctx->sid_ctx_length;
795 if (!ossl_assert(s->sid_ctx_length <= sizeof(s->sid_ctx)))
796 goto err;
797 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
798 s->verify_callback = ctx->default_verify_callback;
799 s->generate_session_id = ctx->generate_session_id;
800
801 s->param = X509_VERIFY_PARAM_new();
802 if (s->param == NULL)
803 goto err;
804 X509_VERIFY_PARAM_inherit(s->param, ctx->param);
805 s->quiet_shutdown = ctx->quiet_shutdown;
806
807 s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode;
808 s->max_send_fragment = ctx->max_send_fragment;
809 s->split_send_fragment = ctx->split_send_fragment;
810 s->max_pipelines = ctx->max_pipelines;
811 s->rlayer.default_read_buf_len = ctx->default_read_buf_len;
812
813 s->ext.debug_cb = 0;
814 s->ext.debug_arg = NULL;
815 s->ext.ticket_expected = 0;
816 s->ext.status_type = ctx->ext.status_type;
817 s->ext.status_expected = 0;
818 s->ext.ocsp.ids = NULL;
819 s->ext.ocsp.exts = NULL;
820 s->ext.ocsp.resp = NULL;
821 s->ext.ocsp.resp_len = 0;
822 SSL_CTX_up_ref(ctx);
823 s->session_ctx = ctx;
824 if (ctx->ext.ecpointformats) {
825 s->ext.ecpointformats =
826 OPENSSL_memdup(ctx->ext.ecpointformats,
827 ctx->ext.ecpointformats_len);
828 if (!s->ext.ecpointformats) {
829 s->ext.ecpointformats_len = 0;
830 goto err;
831 }
832 s->ext.ecpointformats_len =
833 ctx->ext.ecpointformats_len;
834 }
835 if (ctx->ext.supportedgroups) {
836 s->ext.supportedgroups =
837 OPENSSL_memdup(ctx->ext.supportedgroups,
838 ctx->ext.supportedgroups_len
839 * sizeof(*ctx->ext.supportedgroups));
840 if (!s->ext.supportedgroups) {
841 s->ext.supportedgroups_len = 0;
842 goto err;
843 }
844 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
845 }
846
847 #ifndef OPENSSL_NO_NEXTPROTONEG
848 s->ext.npn = NULL;
849 #endif
850
851 if (ctx->ext.alpn != NULL) {
852 s->ext.alpn = OPENSSL_malloc(ctx->ext.alpn_len);
853 if (s->ext.alpn == NULL) {
854 s->ext.alpn_len = 0;
855 goto err;
856 }
857 memcpy(s->ext.alpn, ctx->ext.alpn, ctx->ext.alpn_len);
858 s->ext.alpn_len = ctx->ext.alpn_len;
859 }
860
861 s->verified_chain = NULL;
862 s->verify_result = X509_V_OK;
863
864 s->default_passwd_callback = ctx->default_passwd_callback;
865 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
866
867 s->key_update = SSL_KEY_UPDATE_NONE;
868
869 s->allow_early_data_cb = ctx->allow_early_data_cb;
870 s->allow_early_data_cb_data = ctx->allow_early_data_cb_data;
871
872 if (!ssl->method->ssl_init(ssl))
873 goto err;
874
875 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
876
877 if (!SSL_clear(ssl))
878 goto err;
879
880 #ifndef OPENSSL_NO_PSK
881 s->psk_client_callback = ctx->psk_client_callback;
882 s->psk_server_callback = ctx->psk_server_callback;
883 #endif
884 s->psk_find_session_cb = ctx->psk_find_session_cb;
885 s->psk_use_session_cb = ctx->psk_use_session_cb;
886
887 s->async_cb = ctx->async_cb;
888 s->async_cb_arg = ctx->async_cb_arg;
889
890 s->job = NULL;
891
892 #ifndef OPENSSL_NO_CT
893 if (!SSL_set_ct_validation_callback(ssl, ctx->ct_validation_callback,
894 ctx->ct_validation_callback_arg))
895 goto err;
896 #endif
897
898 return ssl;
899 err:
900 SSL_free(ssl);
901 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
902 return NULL;
903 }
904
SSL_is_dtls(const SSL * s)905 int SSL_is_dtls(const SSL *s)
906 {
907 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
908
909 if (sc == NULL)
910 return 0;
911
912 return SSL_CONNECTION_IS_DTLS(sc) ? 1 : 0;
913 }
914
SSL_up_ref(SSL * s)915 int SSL_up_ref(SSL *s)
916 {
917 int i;
918
919 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
920 return 0;
921
922 REF_PRINT_COUNT("SSL", s);
923 REF_ASSERT_ISNT(i < 2);
924 return ((i > 1) ? 1 : 0);
925 }
926
SSL_CTX_set_session_id_context(SSL_CTX * ctx,const unsigned char * sid_ctx,unsigned int sid_ctx_len)927 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
928 unsigned int sid_ctx_len)
929 {
930 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
931 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
932 return 0;
933 }
934 ctx->sid_ctx_length = sid_ctx_len;
935 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
936
937 return 1;
938 }
939
SSL_set_session_id_context(SSL * ssl,const unsigned char * sid_ctx,unsigned int sid_ctx_len)940 int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
941 unsigned int sid_ctx_len)
942 {
943 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
944
945 if (sc == NULL)
946 return 0;
947
948 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
949 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
950 return 0;
951 }
952 sc->sid_ctx_length = sid_ctx_len;
953 memcpy(sc->sid_ctx, sid_ctx, sid_ctx_len);
954
955 return 1;
956 }
957
SSL_CTX_set_generate_session_id(SSL_CTX * ctx,GEN_SESSION_CB cb)958 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
959 {
960 if (!CRYPTO_THREAD_write_lock(ctx->lock))
961 return 0;
962 ctx->generate_session_id = cb;
963 CRYPTO_THREAD_unlock(ctx->lock);
964 return 1;
965 }
966
SSL_set_generate_session_id(SSL * ssl,GEN_SESSION_CB cb)967 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
968 {
969 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
970
971 if (sc == NULL || !CRYPTO_THREAD_write_lock(ssl->lock))
972 return 0;
973 sc->generate_session_id = cb;
974 CRYPTO_THREAD_unlock(ssl->lock);
975 return 1;
976 }
977
SSL_has_matching_session_id(const SSL * ssl,const unsigned char * id,unsigned int id_len)978 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
979 unsigned int id_len)
980 {
981 /*
982 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
983 * we can "construct" a session to give us the desired check - i.e. to
984 * find if there's a session in the hash table that would conflict with
985 * any new session built out of this id/id_len and the ssl_version in use
986 * by this SSL.
987 */
988 SSL_SESSION r, *p;
989 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(ssl);
990
991 if (sc == NULL || id_len > sizeof(r.session_id))
992 return 0;
993
994 r.ssl_version = sc->version;
995 r.session_id_length = id_len;
996 memcpy(r.session_id, id, id_len);
997
998 if (!CRYPTO_THREAD_read_lock(sc->session_ctx->lock))
999 return 0;
1000 p = lh_SSL_SESSION_retrieve(sc->session_ctx->sessions, &r);
1001 CRYPTO_THREAD_unlock(sc->session_ctx->lock);
1002 return (p != NULL);
1003 }
1004
SSL_CTX_set_purpose(SSL_CTX * s,int purpose)1005 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
1006 {
1007 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
1008 }
1009
SSL_set_purpose(SSL * s,int purpose)1010 int SSL_set_purpose(SSL *s, int purpose)
1011 {
1012 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1013
1014 if (sc == NULL)
1015 return 0;
1016
1017 return X509_VERIFY_PARAM_set_purpose(sc->param, purpose);
1018 }
1019
SSL_CTX_set_trust(SSL_CTX * s,int trust)1020 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
1021 {
1022 return X509_VERIFY_PARAM_set_trust(s->param, trust);
1023 }
1024
SSL_set_trust(SSL * s,int trust)1025 int SSL_set_trust(SSL *s, int trust)
1026 {
1027 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1028
1029 if (sc == NULL)
1030 return 0;
1031
1032 return X509_VERIFY_PARAM_set_trust(sc->param, trust);
1033 }
1034
SSL_set1_host(SSL * s,const char * hostname)1035 int SSL_set1_host(SSL *s, const char *hostname)
1036 {
1037 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1038
1039 if (sc == NULL)
1040 return 0;
1041
1042 /* If a hostname is provided and parses as an IP address,
1043 * treat it as such. */
1044 if (hostname != NULL
1045 && X509_VERIFY_PARAM_set1_ip_asc(sc->param, hostname) == 1)
1046 return 1;
1047
1048 return X509_VERIFY_PARAM_set1_host(sc->param, hostname, 0);
1049 }
1050
SSL_add1_host(SSL * s,const char * hostname)1051 int SSL_add1_host(SSL *s, const char *hostname)
1052 {
1053 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1054
1055 if (sc == NULL)
1056 return 0;
1057
1058 /* If a hostname is provided and parses as an IP address,
1059 * treat it as such. */
1060 if (hostname)
1061 {
1062 ASN1_OCTET_STRING *ip;
1063 char *old_ip;
1064
1065 ip = a2i_IPADDRESS(hostname);
1066 if (ip) {
1067 /* We didn't want it; only to check if it *is* an IP address */
1068 ASN1_OCTET_STRING_free(ip);
1069
1070 old_ip = X509_VERIFY_PARAM_get1_ip_asc(sc->param);
1071 if (old_ip)
1072 {
1073 OPENSSL_free(old_ip);
1074 /* There can be only one IP address */
1075 return 0;
1076 }
1077
1078 return X509_VERIFY_PARAM_set1_ip_asc(sc->param, hostname);
1079 }
1080 }
1081
1082 return X509_VERIFY_PARAM_add1_host(sc->param, hostname, 0);
1083 }
1084
SSL_set_hostflags(SSL * s,unsigned int flags)1085 void SSL_set_hostflags(SSL *s, unsigned int flags)
1086 {
1087 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1088
1089 if (sc == NULL)
1090 return;
1091
1092 X509_VERIFY_PARAM_set_hostflags(sc->param, flags);
1093 }
1094
SSL_get0_peername(SSL * s)1095 const char *SSL_get0_peername(SSL *s)
1096 {
1097 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1098
1099 if (sc == NULL)
1100 return NULL;
1101
1102 return X509_VERIFY_PARAM_get0_peername(sc->param);
1103 }
1104
SSL_CTX_dane_enable(SSL_CTX * ctx)1105 int SSL_CTX_dane_enable(SSL_CTX *ctx)
1106 {
1107 return dane_ctx_enable(&ctx->dane);
1108 }
1109
SSL_CTX_dane_set_flags(SSL_CTX * ctx,unsigned long flags)1110 unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
1111 {
1112 unsigned long orig = ctx->dane.flags;
1113
1114 ctx->dane.flags |= flags;
1115 return orig;
1116 }
1117
SSL_CTX_dane_clear_flags(SSL_CTX * ctx,unsigned long flags)1118 unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
1119 {
1120 unsigned long orig = ctx->dane.flags;
1121
1122 ctx->dane.flags &= ~flags;
1123 return orig;
1124 }
1125
SSL_dane_enable(SSL * s,const char * basedomain)1126 int SSL_dane_enable(SSL *s, const char *basedomain)
1127 {
1128 SSL_DANE *dane;
1129 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1130
1131 if (sc == NULL)
1132 return 0;
1133
1134 dane = &sc->dane;
1135 if (s->ctx->dane.mdmax == 0) {
1136 ERR_raise(ERR_LIB_SSL, SSL_R_CONTEXT_NOT_DANE_ENABLED);
1137 return 0;
1138 }
1139 if (dane->trecs != NULL) {
1140 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_ALREADY_ENABLED);
1141 return 0;
1142 }
1143
1144 /*
1145 * Default SNI name. This rejects empty names, while set1_host below
1146 * accepts them and disables host name checks. To avoid side-effects with
1147 * invalid input, set the SNI name first.
1148 */
1149 if (sc->ext.hostname == NULL) {
1150 if (!SSL_set_tlsext_host_name(s, basedomain)) {
1151 ERR_raise(ERR_LIB_SSL, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1152 return -1;
1153 }
1154 }
1155
1156 /* Primary RFC6125 reference identifier */
1157 if (!X509_VERIFY_PARAM_set1_host(sc->param, basedomain, 0)) {
1158 ERR_raise(ERR_LIB_SSL, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1159 return -1;
1160 }
1161
1162 dane->mdpth = -1;
1163 dane->pdpth = -1;
1164 dane->dctx = &s->ctx->dane;
1165 dane->trecs = sk_danetls_record_new_null();
1166
1167 if (dane->trecs == NULL) {
1168 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1169 return -1;
1170 }
1171 return 1;
1172 }
1173
SSL_dane_set_flags(SSL * ssl,unsigned long flags)1174 unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
1175 {
1176 unsigned long orig;
1177 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
1178
1179 if (sc == NULL)
1180 return 0;
1181
1182 orig = sc->dane.flags;
1183
1184 sc->dane.flags |= flags;
1185 return orig;
1186 }
1187
SSL_dane_clear_flags(SSL * ssl,unsigned long flags)1188 unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
1189 {
1190 unsigned long orig;
1191 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
1192
1193 if (sc == NULL)
1194 return 0;
1195
1196 orig = sc->dane.flags;
1197
1198 sc->dane.flags &= ~flags;
1199 return orig;
1200 }
1201
SSL_get0_dane_authority(SSL * s,X509 ** mcert,EVP_PKEY ** mspki)1202 int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
1203 {
1204 SSL_DANE *dane;
1205 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1206
1207 if (sc == NULL)
1208 return -1;
1209
1210 dane = &sc->dane;
1211
1212 if (!DANETLS_ENABLED(dane) || sc->verify_result != X509_V_OK)
1213 return -1;
1214 if (dane->mtlsa) {
1215 if (mcert)
1216 *mcert = dane->mcert;
1217 if (mspki)
1218 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
1219 }
1220 return dane->mdpth;
1221 }
1222
SSL_get0_dane_tlsa(SSL * s,uint8_t * usage,uint8_t * selector,uint8_t * mtype,const unsigned char ** data,size_t * dlen)1223 int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
1224 uint8_t *mtype, const unsigned char **data, size_t *dlen)
1225 {
1226 SSL_DANE *dane;
1227 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1228
1229 if (sc == NULL)
1230 return -1;
1231
1232 dane = &sc->dane;
1233
1234 if (!DANETLS_ENABLED(dane) || sc->verify_result != X509_V_OK)
1235 return -1;
1236 if (dane->mtlsa) {
1237 if (usage)
1238 *usage = dane->mtlsa->usage;
1239 if (selector)
1240 *selector = dane->mtlsa->selector;
1241 if (mtype)
1242 *mtype = dane->mtlsa->mtype;
1243 if (data)
1244 *data = dane->mtlsa->data;
1245 if (dlen)
1246 *dlen = dane->mtlsa->dlen;
1247 }
1248 return dane->mdpth;
1249 }
1250
SSL_get0_dane(SSL * s)1251 SSL_DANE *SSL_get0_dane(SSL *s)
1252 {
1253 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1254
1255 if (sc == NULL)
1256 return NULL;
1257
1258 return &sc->dane;
1259 }
1260
SSL_dane_tlsa_add(SSL * s,uint8_t usage,uint8_t selector,uint8_t mtype,const unsigned char * data,size_t dlen)1261 int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
1262 uint8_t mtype, const unsigned char *data, size_t dlen)
1263 {
1264 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1265
1266 if (sc == NULL)
1267 return 0;
1268
1269 return dane_tlsa_add(&sc->dane, usage, selector, mtype, data, dlen);
1270 }
1271
SSL_CTX_dane_mtype_set(SSL_CTX * ctx,const EVP_MD * md,uint8_t mtype,uint8_t ord)1272 int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
1273 uint8_t ord)
1274 {
1275 return dane_mtype_set(&ctx->dane, md, mtype, ord);
1276 }
1277
SSL_CTX_set1_param(SSL_CTX * ctx,X509_VERIFY_PARAM * vpm)1278 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
1279 {
1280 return X509_VERIFY_PARAM_set1(ctx->param, vpm);
1281 }
1282
SSL_set1_param(SSL * ssl,X509_VERIFY_PARAM * vpm)1283 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
1284 {
1285 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
1286
1287 if (sc == NULL)
1288 return 0;
1289
1290 return X509_VERIFY_PARAM_set1(sc->param, vpm);
1291 }
1292
SSL_CTX_get0_param(SSL_CTX * ctx)1293 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
1294 {
1295 return ctx->param;
1296 }
1297
SSL_get0_param(SSL * ssl)1298 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
1299 {
1300 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
1301
1302 if (sc == NULL)
1303 return NULL;
1304
1305 return sc->param;
1306 }
1307
SSL_certs_clear(SSL * s)1308 void SSL_certs_clear(SSL *s)
1309 {
1310 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1311
1312 if (sc == NULL)
1313 return;
1314
1315 ssl_cert_clear_certs(sc->cert);
1316 }
1317
SSL_free(SSL * s)1318 void SSL_free(SSL *s)
1319 {
1320 int i;
1321
1322 if (s == NULL)
1323 return;
1324 CRYPTO_DOWN_REF(&s->references, &i, s->lock);
1325 REF_PRINT_COUNT("SSL", s);
1326 if (i > 0)
1327 return;
1328 REF_ASSERT_ISNT(i < 0);
1329
1330 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
1331
1332 if (s->method != NULL)
1333 s->method->ssl_free(s);
1334
1335 SSL_CTX_free(s->ctx);
1336 CRYPTO_THREAD_lock_free(s->lock);
1337
1338 OPENSSL_free(s);
1339 }
1340
ossl_ssl_connection_free(SSL * ssl)1341 void ossl_ssl_connection_free(SSL *ssl)
1342 {
1343 SSL_CONNECTION *s;
1344
1345 s = SSL_CONNECTION_FROM_SSL_ONLY(ssl);
1346 if (s == NULL)
1347 return;
1348
1349 X509_VERIFY_PARAM_free(s->param);
1350 dane_final(&s->dane);
1351
1352 RECORD_LAYER_clear(&s->rlayer);
1353
1354 /* Ignore return value */
1355 ssl_free_wbio_buffer(s);
1356
1357 BIO_free_all(s->wbio);
1358 s->wbio = NULL;
1359 BIO_free_all(s->rbio);
1360 s->rbio = NULL;
1361
1362 BUF_MEM_free(s->init_buf);
1363
1364 /* add extra stuff */
1365 sk_SSL_CIPHER_free(s->cipher_list);
1366 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1367 sk_SSL_CIPHER_free(s->tls13_ciphersuites);
1368 sk_SSL_CIPHER_free(s->peer_ciphers);
1369
1370 /* Make the next call work :-) */
1371 if (s->session != NULL) {
1372 ssl_clear_bad_session(s);
1373 SSL_SESSION_free(s->session);
1374 }
1375 SSL_SESSION_free(s->psksession);
1376 OPENSSL_free(s->psksession_id);
1377
1378 clear_ciphers(s);
1379
1380 ssl_cert_free(s->cert);
1381 OPENSSL_free(s->shared_sigalgs);
1382 /* Free up if allocated */
1383
1384 OPENSSL_free(s->ext.hostname);
1385 SSL_CTX_free(s->session_ctx);
1386 OPENSSL_free(s->ext.ecpointformats);
1387 OPENSSL_free(s->ext.peer_ecpointformats);
1388 OPENSSL_free(s->ext.supportedgroups);
1389 OPENSSL_free(s->ext.peer_supportedgroups);
1390 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
1391 #ifndef OPENSSL_NO_OCSP
1392 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
1393 #endif
1394 #ifndef OPENSSL_NO_CT
1395 SCT_LIST_free(s->scts);
1396 OPENSSL_free(s->ext.scts);
1397 #endif
1398 OPENSSL_free(s->ext.ocsp.resp);
1399 OPENSSL_free(s->ext.alpn);
1400 OPENSSL_free(s->ext.tls13_cookie);
1401 if (s->clienthello != NULL)
1402 OPENSSL_free(s->clienthello->pre_proc_exts);
1403 OPENSSL_free(s->clienthello);
1404 OPENSSL_free(s->pha_context);
1405 EVP_MD_CTX_free(s->pha_dgst);
1406
1407 sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free);
1408 sk_X509_NAME_pop_free(s->client_ca_names, X509_NAME_free);
1409
1410 OSSL_STACK_OF_X509_free(s->verified_chain);
1411
1412 if (ssl->method != NULL)
1413 ssl->method->ssl_deinit(ssl);
1414
1415 ASYNC_WAIT_CTX_free(s->waitctx);
1416
1417 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1418 OPENSSL_free(s->ext.npn);
1419 #endif
1420
1421 #ifndef OPENSSL_NO_SRTP
1422 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
1423 #endif
1424 }
1425
SSL_set0_rbio(SSL * s,BIO * rbio)1426 void SSL_set0_rbio(SSL *s, BIO *rbio)
1427 {
1428 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1429
1430 if (sc == NULL)
1431 return;
1432
1433 BIO_free_all(sc->rbio);
1434 sc->rbio = rbio;
1435 sc->rlayer.rrlmethod->set1_bio(sc->rlayer.rrl, sc->rbio);
1436 }
1437
SSL_set0_wbio(SSL * s,BIO * wbio)1438 void SSL_set0_wbio(SSL *s, BIO *wbio)
1439 {
1440 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1441
1442 if (sc == NULL)
1443 return;
1444
1445 /*
1446 * If the output buffering BIO is still in place, remove it
1447 */
1448 if (sc->bbio != NULL)
1449 sc->wbio = BIO_pop(sc->wbio);
1450
1451 BIO_free_all(sc->wbio);
1452 sc->wbio = wbio;
1453
1454 /* Re-attach |bbio| to the new |wbio|. */
1455 if (sc->bbio != NULL)
1456 sc->wbio = BIO_push(sc->bbio, sc->wbio);
1457 }
1458
SSL_set_bio(SSL * s,BIO * rbio,BIO * wbio)1459 void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
1460 {
1461 /*
1462 * For historical reasons, this function has many different cases in
1463 * ownership handling.
1464 */
1465
1466 /* If nothing has changed, do nothing */
1467 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
1468 return;
1469
1470 /*
1471 * If the two arguments are equal then one fewer reference is granted by the
1472 * caller than we want to take
1473 */
1474 if (rbio != NULL && rbio == wbio)
1475 BIO_up_ref(rbio);
1476
1477 /*
1478 * If only the wbio is changed only adopt one reference.
1479 */
1480 if (rbio == SSL_get_rbio(s)) {
1481 SSL_set0_wbio(s, wbio);
1482 return;
1483 }
1484 /*
1485 * There is an asymmetry here for historical reasons. If only the rbio is
1486 * changed AND the rbio and wbio were originally different, then we only
1487 * adopt one reference.
1488 */
1489 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
1490 SSL_set0_rbio(s, rbio);
1491 return;
1492 }
1493
1494 /* Otherwise, adopt both references. */
1495 SSL_set0_rbio(s, rbio);
1496 SSL_set0_wbio(s, wbio);
1497 }
1498
SSL_get_rbio(const SSL * s)1499 BIO *SSL_get_rbio(const SSL *s)
1500 {
1501 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1502
1503 if (sc == NULL)
1504 return NULL;
1505
1506 return sc->rbio;
1507 }
1508
SSL_get_wbio(const SSL * s)1509 BIO *SSL_get_wbio(const SSL *s)
1510 {
1511 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1512
1513 if (sc == NULL)
1514 return NULL;
1515
1516 if (sc->bbio != NULL) {
1517 /*
1518 * If |bbio| is active, the true caller-configured BIO is its
1519 * |next_bio|.
1520 */
1521 return BIO_next(sc->bbio);
1522 }
1523 return sc->wbio;
1524 }
1525
SSL_get_fd(const SSL * s)1526 int SSL_get_fd(const SSL *s)
1527 {
1528 return SSL_get_rfd(s);
1529 }
1530
SSL_get_rfd(const SSL * s)1531 int SSL_get_rfd(const SSL *s)
1532 {
1533 int ret = -1;
1534 BIO *b, *r;
1535
1536 b = SSL_get_rbio(s);
1537 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1538 if (r != NULL)
1539 BIO_get_fd(r, &ret);
1540 return ret;
1541 }
1542
SSL_get_wfd(const SSL * s)1543 int SSL_get_wfd(const SSL *s)
1544 {
1545 int ret = -1;
1546 BIO *b, *r;
1547
1548 b = SSL_get_wbio(s);
1549 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1550 if (r != NULL)
1551 BIO_get_fd(r, &ret);
1552 return ret;
1553 }
1554
1555 #ifndef OPENSSL_NO_SOCK
SSL_set_fd(SSL * s,int fd)1556 int SSL_set_fd(SSL *s, int fd)
1557 {
1558 int ret = 0;
1559 BIO *bio = NULL;
1560
1561 bio = BIO_new(BIO_s_socket());
1562
1563 if (bio == NULL) {
1564 ERR_raise(ERR_LIB_SSL, ERR_R_BUF_LIB);
1565 goto err;
1566 }
1567 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1568 SSL_set_bio(s, bio, bio);
1569 #ifndef OPENSSL_NO_KTLS
1570 /*
1571 * The new socket is created successfully regardless of ktls_enable.
1572 * ktls_enable doesn't change any functionality of the socket, except
1573 * changing the setsockopt to enable the processing of ktls_start.
1574 * Thus, it is not a problem to call it for non-TLS sockets.
1575 */
1576 ktls_enable(fd);
1577 #endif /* OPENSSL_NO_KTLS */
1578 ret = 1;
1579 err:
1580 return ret;
1581 }
1582
SSL_set_wfd(SSL * s,int fd)1583 int SSL_set_wfd(SSL *s, int fd)
1584 {
1585 BIO *rbio = SSL_get_rbio(s);
1586
1587 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
1588 || (int)BIO_get_fd(rbio, NULL) != fd) {
1589 BIO *bio = BIO_new(BIO_s_socket());
1590
1591 if (bio == NULL) {
1592 ERR_raise(ERR_LIB_SSL, ERR_R_BUF_LIB);
1593 return 0;
1594 }
1595 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1596 SSL_set0_wbio(s, bio);
1597 #ifndef OPENSSL_NO_KTLS
1598 /*
1599 * The new socket is created successfully regardless of ktls_enable.
1600 * ktls_enable doesn't change any functionality of the socket, except
1601 * changing the setsockopt to enable the processing of ktls_start.
1602 * Thus, it is not a problem to call it for non-TLS sockets.
1603 */
1604 ktls_enable(fd);
1605 #endif /* OPENSSL_NO_KTLS */
1606 } else {
1607 BIO_up_ref(rbio);
1608 SSL_set0_wbio(s, rbio);
1609 }
1610 return 1;
1611 }
1612
SSL_set_rfd(SSL * s,int fd)1613 int SSL_set_rfd(SSL *s, int fd)
1614 {
1615 BIO *wbio = SSL_get_wbio(s);
1616
1617 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
1618 || ((int)BIO_get_fd(wbio, NULL) != fd)) {
1619 BIO *bio = BIO_new(BIO_s_socket());
1620
1621 if (bio == NULL) {
1622 ERR_raise(ERR_LIB_SSL, ERR_R_BUF_LIB);
1623 return 0;
1624 }
1625 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1626 SSL_set0_rbio(s, bio);
1627 } else {
1628 BIO_up_ref(wbio);
1629 SSL_set0_rbio(s, wbio);
1630 }
1631
1632 return 1;
1633 }
1634 #endif
1635
1636 /* return length of latest Finished message we sent, copy to 'buf' */
SSL_get_finished(const SSL * s,void * buf,size_t count)1637 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
1638 {
1639 size_t ret = 0;
1640 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1641
1642 if (sc == NULL)
1643 return 0;
1644
1645 ret = sc->s3.tmp.finish_md_len;
1646 if (count > ret)
1647 count = ret;
1648 memcpy(buf, sc->s3.tmp.finish_md, count);
1649 return ret;
1650 }
1651
1652 /* return length of latest Finished message we expected, copy to 'buf' */
SSL_get_peer_finished(const SSL * s,void * buf,size_t count)1653 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
1654 {
1655 size_t ret = 0;
1656 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1657
1658 if (sc == NULL)
1659 return 0;
1660
1661 ret = sc->s3.tmp.peer_finish_md_len;
1662 if (count > ret)
1663 count = ret;
1664 memcpy(buf, sc->s3.tmp.peer_finish_md, count);
1665 return ret;
1666 }
1667
SSL_get_verify_mode(const SSL * s)1668 int SSL_get_verify_mode(const SSL *s)
1669 {
1670 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1671
1672 if (sc == NULL)
1673 return 0;
1674
1675 return sc->verify_mode;
1676 }
1677
SSL_get_verify_depth(const SSL * s)1678 int SSL_get_verify_depth(const SSL *s)
1679 {
1680 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1681
1682 if (sc == NULL)
1683 return 0;
1684
1685 return X509_VERIFY_PARAM_get_depth(sc->param);
1686 }
1687
SSL_get_verify_callback(const SSL * s)1688 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
1689 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1690
1691 if (sc == NULL)
1692 return NULL;
1693
1694 return sc->verify_callback;
1695 }
1696
SSL_CTX_get_verify_mode(const SSL_CTX * ctx)1697 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
1698 {
1699 return ctx->verify_mode;
1700 }
1701
SSL_CTX_get_verify_depth(const SSL_CTX * ctx)1702 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
1703 {
1704 return X509_VERIFY_PARAM_get_depth(ctx->param);
1705 }
1706
SSL_CTX_get_verify_callback(const SSL_CTX * ctx)1707 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
1708 return ctx->default_verify_callback;
1709 }
1710
SSL_set_verify(SSL * s,int mode,int (* callback)(int ok,X509_STORE_CTX * ctx))1711 void SSL_set_verify(SSL *s, int mode,
1712 int (*callback) (int ok, X509_STORE_CTX *ctx))
1713 {
1714 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1715
1716 if (sc == NULL)
1717 return;
1718
1719 sc->verify_mode = mode;
1720 if (callback != NULL)
1721 sc->verify_callback = callback;
1722 }
1723
SSL_set_verify_depth(SSL * s,int depth)1724 void SSL_set_verify_depth(SSL *s, int depth)
1725 {
1726 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1727
1728 if (sc == NULL)
1729 return;
1730
1731 X509_VERIFY_PARAM_set_depth(sc->param, depth);
1732 }
1733
SSL_set_read_ahead(SSL * s,int yes)1734 void SSL_set_read_ahead(SSL *s, int yes)
1735 {
1736 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1737 OSSL_PARAM options[2], *opts = options;
1738
1739 if (sc == NULL)
1740 return;
1741
1742 RECORD_LAYER_set_read_ahead(&sc->rlayer, yes);
1743
1744 *opts++ = OSSL_PARAM_construct_int(OSSL_LIBSSL_RECORD_LAYER_PARAM_READ_AHEAD,
1745 &sc->rlayer.read_ahead);
1746 *opts = OSSL_PARAM_construct_end();
1747
1748 /* Ignore return value */
1749 sc->rlayer.rrlmethod->set_options(sc->rlayer.rrl, options);
1750 }
1751
SSL_get_read_ahead(const SSL * s)1752 int SSL_get_read_ahead(const SSL *s)
1753 {
1754 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1755
1756 if (sc == NULL)
1757 return 0;
1758
1759 return RECORD_LAYER_get_read_ahead(&sc->rlayer);
1760 }
1761
SSL_pending(const SSL * s)1762 int SSL_pending(const SSL *s)
1763 {
1764 size_t pending = s->method->ssl_pending(s);
1765
1766 /*
1767 * SSL_pending cannot work properly if read-ahead is enabled
1768 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
1769 * impossible to fix since SSL_pending cannot report errors that may be
1770 * observed while scanning the new data. (Note that SSL_pending() is
1771 * often used as a boolean value, so we'd better not return -1.)
1772 *
1773 * SSL_pending also cannot work properly if the value >INT_MAX. In that case
1774 * we just return INT_MAX.
1775 */
1776 return pending < INT_MAX ? (int)pending : INT_MAX;
1777 }
1778
SSL_has_pending(const SSL * s)1779 int SSL_has_pending(const SSL *s)
1780 {
1781 /*
1782 * Similar to SSL_pending() but returns a 1 to indicate that we have
1783 * processed or unprocessed data available or 0 otherwise (as opposed to the
1784 * number of bytes available). Unlike SSL_pending() this will take into
1785 * account read_ahead data. A 1 return simply indicates that we have data.
1786 * That data may not result in any application data, or we may fail to parse
1787 * the records for some reason.
1788 */
1789 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1790
1791 /* Check buffered app data if any first */
1792 if (SSL_CONNECTION_IS_DTLS(sc)) {
1793 TLS_RECORD *rdata;
1794 pitem *item, *iter;
1795
1796 iter = pqueue_iterator(sc->rlayer.d->buffered_app_data.q);
1797 while ((item = pqueue_next(&iter)) != NULL) {
1798 rdata = item->data;
1799 if (rdata->length > 0)
1800 return 1;
1801 }
1802 }
1803
1804 if (RECORD_LAYER_processed_read_pending(&sc->rlayer))
1805 return 1;
1806
1807 return RECORD_LAYER_read_pending(&sc->rlayer);
1808 }
1809
SSL_get1_peer_certificate(const SSL * s)1810 X509 *SSL_get1_peer_certificate(const SSL *s)
1811 {
1812 X509 *r = SSL_get0_peer_certificate(s);
1813
1814 if (r != NULL)
1815 X509_up_ref(r);
1816
1817 return r;
1818 }
1819
SSL_get0_peer_certificate(const SSL * s)1820 X509 *SSL_get0_peer_certificate(const SSL *s)
1821 {
1822 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1823
1824 if (sc == NULL)
1825 return NULL;
1826
1827 if (sc->session == NULL)
1828 return NULL;
1829 else
1830 return sc->session->peer;
1831 }
1832
STACK_OF(X509)1833 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
1834 {
1835 STACK_OF(X509) *r;
1836 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
1837
1838 if (sc == NULL)
1839 return NULL;
1840
1841 if (sc->session == NULL)
1842 r = NULL;
1843 else
1844 r = sc->session->peer_chain;
1845
1846 /*
1847 * If we are a client, cert_chain includes the peer's own certificate; if
1848 * we are a server, it does not.
1849 */
1850
1851 return r;
1852 }
1853
1854 /*
1855 * Now in theory, since the calling process own 't' it should be safe to
1856 * modify. We need to be able to read f without being hassled
1857 */
SSL_copy_session_id(SSL * t,const SSL * f)1858 int SSL_copy_session_id(SSL *t, const SSL *f)
1859 {
1860 int i;
1861 /* TODO(QUIC): Do we want to support this for QUIC connections? */
1862 SSL_CONNECTION *tsc = SSL_CONNECTION_FROM_SSL_ONLY(t);
1863 const SSL_CONNECTION *fsc = SSL_CONNECTION_FROM_CONST_SSL_ONLY(f);
1864
1865 if (tsc == NULL || fsc == NULL)
1866 return 0;
1867
1868 /* Do we need to do SSL locking? */
1869 if (!SSL_set_session(t, SSL_get_session(f))) {
1870 return 0;
1871 }
1872
1873 /*
1874 * what if we are setup for one protocol version but want to talk another
1875 */
1876 if (t->method != f->method) {
1877 t->method->ssl_deinit(t);
1878 t->method = f->method;
1879 if (t->method->ssl_init(t) == 0)
1880 return 0;
1881 }
1882
1883 CRYPTO_UP_REF(&fsc->cert->references, &i, fsc->cert->lock);
1884 ssl_cert_free(tsc->cert);
1885 tsc->cert = fsc->cert;
1886 if (!SSL_set_session_id_context(t, fsc->sid_ctx, (int)fsc->sid_ctx_length)) {
1887 return 0;
1888 }
1889
1890 return 1;
1891 }
1892
1893 /* Fix this so it checks all the valid key/cert options */
SSL_CTX_check_private_key(const SSL_CTX * ctx)1894 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
1895 {
1896 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
1897 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_ASSIGNED);
1898 return 0;
1899 }
1900 if (ctx->cert->key->privatekey == NULL) {
1901 ERR_raise(ERR_LIB_SSL, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1902 return 0;
1903 }
1904 return X509_check_private_key
1905 (ctx->cert->key->x509, ctx->cert->key->privatekey);
1906 }
1907
1908 /* Fix this function so that it takes an optional type parameter */
SSL_check_private_key(const SSL * ssl)1909 int SSL_check_private_key(const SSL *ssl)
1910 {
1911 const SSL_CONNECTION *sc;
1912
1913 if ((sc = SSL_CONNECTION_FROM_CONST_SSL(ssl)) == NULL) {
1914 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_NULL_PARAMETER);
1915 return 0;
1916 }
1917 if (sc->cert->key->x509 == NULL) {
1918 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_ASSIGNED);
1919 return 0;
1920 }
1921 if (sc->cert->key->privatekey == NULL) {
1922 ERR_raise(ERR_LIB_SSL, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1923 return 0;
1924 }
1925 return X509_check_private_key(sc->cert->key->x509,
1926 sc->cert->key->privatekey);
1927 }
1928
SSL_waiting_for_async(SSL * s)1929 int SSL_waiting_for_async(SSL *s)
1930 {
1931 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1932
1933 if (sc == NULL)
1934 return 0;
1935
1936 if (sc->job)
1937 return 1;
1938
1939 return 0;
1940 }
1941
SSL_get_all_async_fds(SSL * s,OSSL_ASYNC_FD * fds,size_t * numfds)1942 int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
1943 {
1944 ASYNC_WAIT_CTX *ctx;
1945 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1946
1947 if (sc == NULL)
1948 return 0;
1949
1950 if ((ctx = sc->waitctx) == NULL)
1951 return 0;
1952 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
1953 }
1954
SSL_get_changed_async_fds(SSL * s,OSSL_ASYNC_FD * addfd,size_t * numaddfds,OSSL_ASYNC_FD * delfd,size_t * numdelfds)1955 int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
1956 OSSL_ASYNC_FD *delfd, size_t *numdelfds)
1957 {
1958 ASYNC_WAIT_CTX *ctx;
1959 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1960
1961 if (sc == NULL)
1962 return 0;
1963
1964 if ((ctx = sc->waitctx) == NULL)
1965 return 0;
1966 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
1967 numdelfds);
1968 }
1969
SSL_CTX_set_async_callback(SSL_CTX * ctx,SSL_async_callback_fn callback)1970 int SSL_CTX_set_async_callback(SSL_CTX *ctx, SSL_async_callback_fn callback)
1971 {
1972 ctx->async_cb = callback;
1973 return 1;
1974 }
1975
SSL_CTX_set_async_callback_arg(SSL_CTX * ctx,void * arg)1976 int SSL_CTX_set_async_callback_arg(SSL_CTX *ctx, void *arg)
1977 {
1978 ctx->async_cb_arg = arg;
1979 return 1;
1980 }
1981
SSL_set_async_callback(SSL * s,SSL_async_callback_fn callback)1982 int SSL_set_async_callback(SSL *s, SSL_async_callback_fn callback)
1983 {
1984 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1985
1986 if (sc == NULL)
1987 return 0;
1988
1989 sc->async_cb = callback;
1990 return 1;
1991 }
1992
SSL_set_async_callback_arg(SSL * s,void * arg)1993 int SSL_set_async_callback_arg(SSL *s, void *arg)
1994 {
1995 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1996
1997 if (sc == NULL)
1998 return 0;
1999
2000 sc->async_cb_arg = arg;
2001 return 1;
2002 }
2003
SSL_get_async_status(SSL * s,int * status)2004 int SSL_get_async_status(SSL *s, int *status)
2005 {
2006 ASYNC_WAIT_CTX *ctx;
2007 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2008
2009 if (sc == NULL)
2010 return 0;
2011
2012 if ((ctx = sc->waitctx) == NULL)
2013 return 0;
2014 *status = ASYNC_WAIT_CTX_get_status(ctx);
2015 return 1;
2016 }
2017
SSL_accept(SSL * s)2018 int SSL_accept(SSL *s)
2019 {
2020 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2021
2022 if (sc == NULL)
2023 return 0;
2024
2025 if (sc->handshake_func == NULL) {
2026 /* Not properly initialized yet */
2027 SSL_set_accept_state(s);
2028 }
2029
2030 return SSL_do_handshake(s);
2031 }
2032
SSL_connect(SSL * s)2033 int SSL_connect(SSL *s)
2034 {
2035 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2036
2037 if (sc == NULL)
2038 return 0;
2039
2040 if (sc->handshake_func == NULL) {
2041 /* Not properly initialized yet */
2042 SSL_set_connect_state(s);
2043 }
2044
2045 return SSL_do_handshake(s);
2046 }
2047
SSL_get_default_timeout(const SSL * s)2048 long SSL_get_default_timeout(const SSL *s)
2049 {
2050 return s->method->get_timeout();
2051 }
2052
ssl_async_wait_ctx_cb(void * arg)2053 static int ssl_async_wait_ctx_cb(void *arg)
2054 {
2055 SSL *s = (SSL *)arg;
2056 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2057
2058 if (sc == NULL)
2059 return 0;
2060
2061 return sc->async_cb(s, sc->async_cb_arg);
2062 }
2063
ssl_start_async_job(SSL * s,struct ssl_async_args * args,int (* func)(void *))2064 static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
2065 int (*func) (void *))
2066 {
2067 int ret;
2068 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2069
2070 if (sc == NULL)
2071 return 0;
2072
2073 if (sc->waitctx == NULL) {
2074 sc->waitctx = ASYNC_WAIT_CTX_new();
2075 if (sc->waitctx == NULL)
2076 return -1;
2077 if (sc->async_cb != NULL
2078 && !ASYNC_WAIT_CTX_set_callback
2079 (sc->waitctx, ssl_async_wait_ctx_cb, s))
2080 return -1;
2081 }
2082
2083 sc->rwstate = SSL_NOTHING;
2084 switch (ASYNC_start_job(&sc->job, sc->waitctx, &ret, func, args,
2085 sizeof(struct ssl_async_args))) {
2086 case ASYNC_ERR:
2087 sc->rwstate = SSL_NOTHING;
2088 ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_INIT_ASYNC);
2089 return -1;
2090 case ASYNC_PAUSE:
2091 sc->rwstate = SSL_ASYNC_PAUSED;
2092 return -1;
2093 case ASYNC_NO_JOBS:
2094 sc->rwstate = SSL_ASYNC_NO_JOBS;
2095 return -1;
2096 case ASYNC_FINISH:
2097 sc->job = NULL;
2098 return ret;
2099 default:
2100 sc->rwstate = SSL_NOTHING;
2101 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
2102 /* Shouldn't happen */
2103 return -1;
2104 }
2105 }
2106
ssl_io_intern(void * vargs)2107 static int ssl_io_intern(void *vargs)
2108 {
2109 struct ssl_async_args *args;
2110 SSL *s;
2111 void *buf;
2112 size_t num;
2113 SSL_CONNECTION *sc;
2114
2115 args = (struct ssl_async_args *)vargs;
2116 s = args->s;
2117 buf = args->buf;
2118 num = args->num;
2119 if ((sc = SSL_CONNECTION_FROM_SSL(s)) == NULL)
2120 return -1;
2121
2122 switch (args->type) {
2123 case READFUNC:
2124 return args->f.func_read(s, buf, num, &sc->asyncrw);
2125 case WRITEFUNC:
2126 return args->f.func_write(s, buf, num, &sc->asyncrw);
2127 case OTHERFUNC:
2128 return args->f.func_other(s);
2129 }
2130 return -1;
2131 }
2132
ssl_read_internal(SSL * s,void * buf,size_t num,size_t * readbytes)2133 int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
2134 {
2135 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2136
2137 if (sc == NULL)
2138 return -1;
2139
2140 if (sc->handshake_func == NULL) {
2141 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2142 return -1;
2143 }
2144
2145 if (sc->shutdown & SSL_RECEIVED_SHUTDOWN) {
2146 sc->rwstate = SSL_NOTHING;
2147 return 0;
2148 }
2149
2150 if (sc->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
2151 || sc->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
2152 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2153 return 0;
2154 }
2155 /*
2156 * If we are a client and haven't received the ServerHello etc then we
2157 * better do that
2158 */
2159 ossl_statem_check_finish_init(sc, 0);
2160
2161 if ((sc->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2162 struct ssl_async_args args;
2163 int ret;
2164
2165 args.s = s;
2166 args.buf = buf;
2167 args.num = num;
2168 args.type = READFUNC;
2169 args.f.func_read = s->method->ssl_read;
2170
2171 ret = ssl_start_async_job(s, &args, ssl_io_intern);
2172 *readbytes = sc->asyncrw;
2173 return ret;
2174 } else {
2175 return s->method->ssl_read(s, buf, num, readbytes);
2176 }
2177 }
2178
SSL_read(SSL * s,void * buf,int num)2179 int SSL_read(SSL *s, void *buf, int num)
2180 {
2181 int ret;
2182 size_t readbytes;
2183
2184 if (num < 0) {
2185 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
2186 return -1;
2187 }
2188
2189 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
2190
2191 /*
2192 * The cast is safe here because ret should be <= INT_MAX because num is
2193 * <= INT_MAX
2194 */
2195 if (ret > 0)
2196 ret = (int)readbytes;
2197
2198 return ret;
2199 }
2200
SSL_read_ex(SSL * s,void * buf,size_t num,size_t * readbytes)2201 int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
2202 {
2203 int ret = ssl_read_internal(s, buf, num, readbytes);
2204
2205 if (ret < 0)
2206 ret = 0;
2207 return ret;
2208 }
2209
SSL_read_early_data(SSL * s,void * buf,size_t num,size_t * readbytes)2210 int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
2211 {
2212 int ret;
2213 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
2214
2215 /* TODO(QUIC): This will need special handling for QUIC */
2216 if (sc == NULL)
2217 return 0;
2218
2219 if (!sc->server) {
2220 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2221 return SSL_READ_EARLY_DATA_ERROR;
2222 }
2223
2224 switch (sc->early_data_state) {
2225 case SSL_EARLY_DATA_NONE:
2226 if (!SSL_in_before(s)) {
2227 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2228 return SSL_READ_EARLY_DATA_ERROR;
2229 }
2230 /* fall through */
2231
2232 case SSL_EARLY_DATA_ACCEPT_RETRY:
2233 sc->early_data_state = SSL_EARLY_DATA_ACCEPTING;
2234 ret = SSL_accept(s);
2235 if (ret <= 0) {
2236 /* NBIO or error */
2237 sc->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
2238 return SSL_READ_EARLY_DATA_ERROR;
2239 }
2240 /* fall through */
2241
2242 case SSL_EARLY_DATA_READ_RETRY:
2243 if (sc->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
2244 sc->early_data_state = SSL_EARLY_DATA_READING;
2245 ret = SSL_read_ex(s, buf, num, readbytes);
2246 /*
2247 * State machine will update early_data_state to
2248 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData
2249 * message
2250 */
2251 if (ret > 0 || (ret <= 0 && sc->early_data_state
2252 != SSL_EARLY_DATA_FINISHED_READING)) {
2253 sc->early_data_state = SSL_EARLY_DATA_READ_RETRY;
2254 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
2255 : SSL_READ_EARLY_DATA_ERROR;
2256 }
2257 } else {
2258 sc->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
2259 }
2260 *readbytes = 0;
2261 return SSL_READ_EARLY_DATA_FINISH;
2262
2263 default:
2264 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2265 return SSL_READ_EARLY_DATA_ERROR;
2266 }
2267 }
2268
SSL_get_early_data_status(const SSL * s)2269 int SSL_get_early_data_status(const SSL *s)
2270 {
2271 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL_ONLY(s);
2272
2273 /* TODO(QUIC): This will need special handling for QUIC */
2274 if (sc == NULL)
2275 return 0;
2276
2277 return sc->ext.early_data;
2278 }
2279
ssl_peek_internal(SSL * s,void * buf,size_t num,size_t * readbytes)2280 static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
2281 {
2282 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2283
2284 if (sc == NULL)
2285 return 0;
2286
2287 if (sc->handshake_func == NULL) {
2288 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2289 return -1;
2290 }
2291
2292 if (sc->shutdown & SSL_RECEIVED_SHUTDOWN) {
2293 return 0;
2294 }
2295 if ((sc->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2296 struct ssl_async_args args;
2297 int ret;
2298
2299 args.s = s;
2300 args.buf = buf;
2301 args.num = num;
2302 args.type = READFUNC;
2303 args.f.func_read = s->method->ssl_peek;
2304
2305 ret = ssl_start_async_job(s, &args, ssl_io_intern);
2306 *readbytes = sc->asyncrw;
2307 return ret;
2308 } else {
2309 return s->method->ssl_peek(s, buf, num, readbytes);
2310 }
2311 }
2312
SSL_peek(SSL * s,void * buf,int num)2313 int SSL_peek(SSL *s, void *buf, int num)
2314 {
2315 int ret;
2316 size_t readbytes;
2317
2318 if (num < 0) {
2319 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
2320 return -1;
2321 }
2322
2323 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
2324
2325 /*
2326 * The cast is safe here because ret should be <= INT_MAX because num is
2327 * <= INT_MAX
2328 */
2329 if (ret > 0)
2330 ret = (int)readbytes;
2331
2332 return ret;
2333 }
2334
2335
SSL_peek_ex(SSL * s,void * buf,size_t num,size_t * readbytes)2336 int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
2337 {
2338 int ret = ssl_peek_internal(s, buf, num, readbytes);
2339
2340 if (ret < 0)
2341 ret = 0;
2342 return ret;
2343 }
2344
ssl_write_internal(SSL * s,const void * buf,size_t num,size_t * written)2345 int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
2346 {
2347 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2348
2349 if (sc == NULL)
2350 return 0;
2351
2352 if (sc->handshake_func == NULL) {
2353 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2354 return -1;
2355 }
2356
2357 if (sc->shutdown & SSL_SENT_SHUTDOWN) {
2358 sc->rwstate = SSL_NOTHING;
2359 ERR_raise(ERR_LIB_SSL, SSL_R_PROTOCOL_IS_SHUTDOWN);
2360 return -1;
2361 }
2362
2363 if (sc->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
2364 || sc->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY
2365 || sc->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
2366 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2367 return 0;
2368 }
2369 /* If we are a client and haven't sent the Finished we better do that */
2370 ossl_statem_check_finish_init(sc, 1);
2371
2372 if ((sc->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2373 int ret;
2374 struct ssl_async_args args;
2375
2376 args.s = s;
2377 args.buf = (void *)buf;
2378 args.num = num;
2379 args.type = WRITEFUNC;
2380 args.f.func_write = s->method->ssl_write;
2381
2382 ret = ssl_start_async_job(s, &args, ssl_io_intern);
2383 *written = sc->asyncrw;
2384 return ret;
2385 } else {
2386 return s->method->ssl_write(s, buf, num, written);
2387 }
2388 }
2389
SSL_sendfile(SSL * s,int fd,off_t offset,size_t size,int flags)2390 ossl_ssize_t SSL_sendfile(SSL *s, int fd, off_t offset, size_t size, int flags)
2391 {
2392 ossl_ssize_t ret;
2393 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
2394
2395 if (sc == NULL)
2396 return 0;
2397
2398 if (sc->handshake_func == NULL) {
2399 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2400 return -1;
2401 }
2402
2403 if (sc->shutdown & SSL_SENT_SHUTDOWN) {
2404 sc->rwstate = SSL_NOTHING;
2405 ERR_raise(ERR_LIB_SSL, SSL_R_PROTOCOL_IS_SHUTDOWN);
2406 return -1;
2407 }
2408
2409 if (!BIO_get_ktls_send(sc->wbio)) {
2410 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2411 return -1;
2412 }
2413
2414 /* If we have an alert to send, lets send it */
2415 if (sc->s3.alert_dispatch) {
2416 ret = (ossl_ssize_t)s->method->ssl_dispatch_alert(s);
2417 if (ret <= 0) {
2418 /* SSLfatal() already called if appropriate */
2419 return ret;
2420 }
2421 /* if it went, fall through and send more stuff */
2422 }
2423
2424 sc->rwstate = SSL_WRITING;
2425 if (BIO_flush(sc->wbio) <= 0) {
2426 if (!BIO_should_retry(sc->wbio)) {
2427 sc->rwstate = SSL_NOTHING;
2428 } else {
2429 #ifdef EAGAIN
2430 set_sys_error(EAGAIN);
2431 #endif
2432 }
2433 return -1;
2434 }
2435
2436 #ifdef OPENSSL_NO_KTLS
2437 ERR_raise_data(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR,
2438 "can't call ktls_sendfile(), ktls disabled");
2439 return -1;
2440 #else
2441 ret = ktls_sendfile(SSL_get_wfd(s), fd, offset, size, flags);
2442 if (ret < 0) {
2443 #if defined(EAGAIN) && defined(EINTR) && defined(EBUSY)
2444 if ((get_last_sys_error() == EAGAIN) ||
2445 (get_last_sys_error() == EINTR) ||
2446 (get_last_sys_error() == EBUSY))
2447 BIO_set_retry_write(sc->wbio);
2448 else
2449 #endif
2450 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2451 return ret;
2452 }
2453 sc->rwstate = SSL_NOTHING;
2454 return ret;
2455 #endif
2456 }
2457
SSL_write(SSL * s,const void * buf,int num)2458 int SSL_write(SSL *s, const void *buf, int num)
2459 {
2460 int ret;
2461 size_t written;
2462
2463 if (num < 0) {
2464 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
2465 return -1;
2466 }
2467
2468 ret = ssl_write_internal(s, buf, (size_t)num, &written);
2469
2470 /*
2471 * The cast is safe here because ret should be <= INT_MAX because num is
2472 * <= INT_MAX
2473 */
2474 if (ret > 0)
2475 ret = (int)written;
2476
2477 return ret;
2478 }
2479
SSL_write_ex(SSL * s,const void * buf,size_t num,size_t * written)2480 int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
2481 {
2482 int ret = ssl_write_internal(s, buf, num, written);
2483
2484 if (ret < 0)
2485 ret = 0;
2486 return ret;
2487 }
2488
SSL_write_early_data(SSL * s,const void * buf,size_t num,size_t * written)2489 int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
2490 {
2491 int ret, early_data_state;
2492 size_t writtmp;
2493 uint32_t partialwrite;
2494 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
2495
2496 /* TODO(QUIC): This will need special handling for QUIC */
2497 if (sc == NULL)
2498 return 0;
2499
2500 switch (sc->early_data_state) {
2501 case SSL_EARLY_DATA_NONE:
2502 if (sc->server
2503 || !SSL_in_before(s)
2504 || ((sc->session == NULL || sc->session->ext.max_early_data == 0)
2505 && (sc->psk_use_session_cb == NULL))) {
2506 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2507 return 0;
2508 }
2509 /* fall through */
2510
2511 case SSL_EARLY_DATA_CONNECT_RETRY:
2512 sc->early_data_state = SSL_EARLY_DATA_CONNECTING;
2513 ret = SSL_connect(s);
2514 if (ret <= 0) {
2515 /* NBIO or error */
2516 sc->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
2517 return 0;
2518 }
2519 /* fall through */
2520
2521 case SSL_EARLY_DATA_WRITE_RETRY:
2522 sc->early_data_state = SSL_EARLY_DATA_WRITING;
2523 /*
2524 * We disable partial write for early data because we don't keep track
2525 * of how many bytes we've written between the SSL_write_ex() call and
2526 * the flush if the flush needs to be retried)
2527 */
2528 partialwrite = sc->mode & SSL_MODE_ENABLE_PARTIAL_WRITE;
2529 sc->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE;
2530 ret = SSL_write_ex(s, buf, num, &writtmp);
2531 sc->mode |= partialwrite;
2532 if (!ret) {
2533 sc->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2534 return ret;
2535 }
2536 sc->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH;
2537 /* fall through */
2538
2539 case SSL_EARLY_DATA_WRITE_FLUSH:
2540 /* The buffering BIO is still in place so we need to flush it */
2541 if (statem_flush(sc) != 1)
2542 return 0;
2543 *written = num;
2544 sc->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2545 return 1;
2546
2547 case SSL_EARLY_DATA_FINISHED_READING:
2548 case SSL_EARLY_DATA_READ_RETRY:
2549 early_data_state = sc->early_data_state;
2550 /* We are a server writing to an unauthenticated client */
2551 sc->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING;
2552 ret = SSL_write_ex(s, buf, num, written);
2553 /* The buffering BIO is still in place */
2554 if (ret)
2555 (void)BIO_flush(sc->wbio);
2556 sc->early_data_state = early_data_state;
2557 return ret;
2558
2559 default:
2560 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2561 return 0;
2562 }
2563 }
2564
SSL_shutdown(SSL * s)2565 int SSL_shutdown(SSL *s)
2566 {
2567 /*
2568 * Note that this function behaves differently from what one might
2569 * expect. Return values are 0 for no success (yet), 1 for success; but
2570 * calling it once is usually not enough, even if blocking I/O is used
2571 * (see ssl3_shutdown).
2572 */
2573 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2574
2575 if (sc == NULL)
2576 return -1;
2577
2578 if (sc->handshake_func == NULL) {
2579 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2580 return -1;
2581 }
2582
2583 if (!SSL_in_init(s)) {
2584 if ((sc->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2585 struct ssl_async_args args;
2586
2587 memset(&args, 0, sizeof(args));
2588 args.s = s;
2589 args.type = OTHERFUNC;
2590 args.f.func_other = s->method->ssl_shutdown;
2591
2592 return ssl_start_async_job(s, &args, ssl_io_intern);
2593 } else {
2594 return s->method->ssl_shutdown(s);
2595 }
2596 } else {
2597 ERR_raise(ERR_LIB_SSL, SSL_R_SHUTDOWN_WHILE_IN_INIT);
2598 return -1;
2599 }
2600 }
2601
SSL_key_update(SSL * s,int updatetype)2602 int SSL_key_update(SSL *s, int updatetype)
2603 {
2604 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2605
2606 if (sc == NULL)
2607 return 0;
2608
2609 if (!SSL_CONNECTION_IS_TLS13(sc)) {
2610 ERR_raise(ERR_LIB_SSL, SSL_R_WRONG_SSL_VERSION);
2611 return 0;
2612 }
2613
2614 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
2615 && updatetype != SSL_KEY_UPDATE_REQUESTED) {
2616 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_KEY_UPDATE_TYPE);
2617 return 0;
2618 }
2619
2620 if (!SSL_is_init_finished(s)) {
2621 ERR_raise(ERR_LIB_SSL, SSL_R_STILL_IN_INIT);
2622 return 0;
2623 }
2624
2625 if (RECORD_LAYER_write_pending(&sc->rlayer)) {
2626 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_WRITE_RETRY);
2627 return 0;
2628 }
2629
2630 ossl_statem_set_in_init(sc, 1);
2631 sc->key_update = updatetype;
2632 return 1;
2633 }
2634
SSL_get_key_update_type(const SSL * s)2635 int SSL_get_key_update_type(const SSL *s)
2636 {
2637 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
2638
2639 if (sc == NULL)
2640 return 0;
2641
2642 return sc->key_update;
2643 }
2644
2645 /*
2646 * Can we accept a renegotiation request? If yes, set the flag and
2647 * return 1 if yes. If not, raise error and return 0.
2648 */
can_renegotiate(const SSL_CONNECTION * sc)2649 static int can_renegotiate(const SSL_CONNECTION *sc)
2650 {
2651 if (SSL_CONNECTION_IS_TLS13(sc)) {
2652 ERR_raise(ERR_LIB_SSL, SSL_R_WRONG_SSL_VERSION);
2653 return 0;
2654 }
2655
2656 if ((sc->options & SSL_OP_NO_RENEGOTIATION) != 0) {
2657 ERR_raise(ERR_LIB_SSL, SSL_R_NO_RENEGOTIATION);
2658 return 0;
2659 }
2660
2661 return 1;
2662 }
2663
SSL_renegotiate(SSL * s)2664 int SSL_renegotiate(SSL *s)
2665 {
2666 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
2667
2668 if (sc == NULL)
2669 return 0;
2670
2671 if (!can_renegotiate(sc))
2672 return 0;
2673
2674 sc->renegotiate = 1;
2675 sc->new_session = 1;
2676 return s->method->ssl_renegotiate(s);
2677 }
2678
SSL_renegotiate_abbreviated(SSL * s)2679 int SSL_renegotiate_abbreviated(SSL *s)
2680 {
2681 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
2682
2683 if (sc == NULL)
2684 return 0;
2685
2686 if (!can_renegotiate(sc))
2687 return 0;
2688
2689 sc->renegotiate = 1;
2690 sc->new_session = 0;
2691 return s->method->ssl_renegotiate(s);
2692 }
2693
SSL_renegotiate_pending(const SSL * s)2694 int SSL_renegotiate_pending(const SSL *s)
2695 {
2696 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
2697
2698 if (sc == NULL)
2699 return 0;
2700
2701 /*
2702 * becomes true when negotiation is requested; false again once a
2703 * handshake has finished
2704 */
2705 return (sc->renegotiate != 0);
2706 }
2707
SSL_new_session_ticket(SSL * s)2708 int SSL_new_session_ticket(SSL *s)
2709 {
2710 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2711
2712 if (sc == NULL)
2713 return 0;
2714
2715 /* If we are in init because we're sending tickets, okay to send more. */
2716 if ((SSL_in_init(s) && sc->ext.extra_tickets_expected == 0)
2717 || SSL_IS_FIRST_HANDSHAKE(sc) || !sc->server
2718 || !SSL_CONNECTION_IS_TLS13(sc))
2719 return 0;
2720 sc->ext.extra_tickets_expected++;
2721 if (!RECORD_LAYER_write_pending(&sc->rlayer) && !SSL_in_init(s))
2722 ossl_statem_set_in_init(sc, 1);
2723 return 1;
2724 }
2725
SSL_ctrl(SSL * s,int cmd,long larg,void * parg)2726 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
2727 {
2728 long l;
2729 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2730
2731 /* TODO(QUIC): Special handling for some ctrls will be needed */
2732 if (sc == NULL)
2733 return 0;
2734
2735 switch (cmd) {
2736 case SSL_CTRL_GET_READ_AHEAD:
2737 return RECORD_LAYER_get_read_ahead(&sc->rlayer);
2738 case SSL_CTRL_SET_READ_AHEAD:
2739 l = RECORD_LAYER_get_read_ahead(&sc->rlayer);
2740 RECORD_LAYER_set_read_ahead(&sc->rlayer, larg);
2741 return l;
2742
2743 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2744 sc->msg_callback_arg = parg;
2745 return 1;
2746
2747 case SSL_CTRL_MODE:
2748 {
2749 OSSL_PARAM options[2], *opts = options;
2750
2751 sc->mode |= larg;
2752
2753 *opts++ = OSSL_PARAM_construct_uint32(OSSL_LIBSSL_RECORD_LAYER_PARAM_MODE,
2754 &sc->mode);
2755 *opts = OSSL_PARAM_construct_end();
2756
2757 /* Ignore return value */
2758 sc->rlayer.rrlmethod->set_options(sc->rlayer.rrl, options);
2759
2760 return sc->mode;
2761 }
2762 case SSL_CTRL_CLEAR_MODE:
2763 return (sc->mode &= ~larg);
2764 case SSL_CTRL_GET_MAX_CERT_LIST:
2765 return (long)sc->max_cert_list;
2766 case SSL_CTRL_SET_MAX_CERT_LIST:
2767 if (larg < 0)
2768 return 0;
2769 l = (long)sc->max_cert_list;
2770 sc->max_cert_list = (size_t)larg;
2771 return l;
2772 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2773 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2774 return 0;
2775 #ifndef OPENSSL_NO_KTLS
2776 if (sc->wbio != NULL && BIO_get_ktls_send(sc->wbio))
2777 return 0;
2778 #endif /* OPENSSL_NO_KTLS */
2779 sc->max_send_fragment = larg;
2780 if (sc->max_send_fragment < sc->split_send_fragment)
2781 sc->split_send_fragment = sc->max_send_fragment;
2782 return 1;
2783 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2784 if ((size_t)larg > sc->max_send_fragment || larg == 0)
2785 return 0;
2786 sc->split_send_fragment = larg;
2787 return 1;
2788 case SSL_CTRL_SET_MAX_PIPELINES:
2789 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2790 return 0;
2791 sc->max_pipelines = larg;
2792 if (sc->rlayer.rrlmethod->set_max_pipelines != NULL)
2793 sc->rlayer.rrlmethod->set_max_pipelines(sc->rlayer.rrl, (size_t)larg);
2794 return 1;
2795 case SSL_CTRL_GET_RI_SUPPORT:
2796 return sc->s3.send_connection_binding;
2797 case SSL_CTRL_SET_RETRY_VERIFY:
2798 sc->rwstate = SSL_RETRY_VERIFY;
2799 return 1;
2800 case SSL_CTRL_CERT_FLAGS:
2801 return (sc->cert->cert_flags |= larg);
2802 case SSL_CTRL_CLEAR_CERT_FLAGS:
2803 return (sc->cert->cert_flags &= ~larg);
2804
2805 case SSL_CTRL_GET_RAW_CIPHERLIST:
2806 if (parg) {
2807 if (sc->s3.tmp.ciphers_raw == NULL)
2808 return 0;
2809 *(unsigned char **)parg = sc->s3.tmp.ciphers_raw;
2810 return (int)sc->s3.tmp.ciphers_rawlen;
2811 } else {
2812 return TLS_CIPHER_LEN;
2813 }
2814 case SSL_CTRL_GET_EXTMS_SUPPORT:
2815 if (!sc->session || SSL_in_init(s) || ossl_statem_get_in_handshake(sc))
2816 return -1;
2817 if (sc->session->flags & SSL_SESS_FLAG_EXTMS)
2818 return 1;
2819 else
2820 return 0;
2821 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2822 return ssl_check_allowed_versions(larg, sc->max_proto_version)
2823 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2824 &sc->min_proto_version);
2825 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2826 return sc->min_proto_version;
2827 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2828 return ssl_check_allowed_versions(sc->min_proto_version, larg)
2829 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2830 &sc->max_proto_version);
2831 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2832 return sc->max_proto_version;
2833 default:
2834 return s->method->ssl_ctrl(s, cmd, larg, parg);
2835 }
2836 }
2837
SSL_callback_ctrl(SSL * s,int cmd,void (* fp)(void))2838 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
2839 {
2840 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
2841
2842 if (sc == NULL)
2843 return 0;
2844
2845 switch (cmd) {
2846 case SSL_CTRL_SET_MSG_CALLBACK:
2847 sc->msg_callback = (void (*)
2848 (int write_p, int version, int content_type,
2849 const void *buf, size_t len, SSL *ssl,
2850 void *arg))(fp);
2851 return 1;
2852
2853 default:
2854 return s->method->ssl_callback_ctrl(s, cmd, fp);
2855 }
2856 }
2857
LHASH_OF(SSL_SESSION)2858 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
2859 {
2860 return ctx->sessions;
2861 }
2862
ssl_tsan_load(SSL_CTX * ctx,TSAN_QUALIFIER int * stat)2863 static int ssl_tsan_load(SSL_CTX *ctx, TSAN_QUALIFIER int *stat)
2864 {
2865 int res = 0;
2866
2867 if (ssl_tsan_lock(ctx)) {
2868 res = tsan_load(stat);
2869 ssl_tsan_unlock(ctx);
2870 }
2871 return res;
2872 }
2873
SSL_CTX_ctrl(SSL_CTX * ctx,int cmd,long larg,void * parg)2874 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
2875 {
2876 long l;
2877 /* For some cases with ctx == NULL perform syntax checks */
2878 if (ctx == NULL) {
2879 switch (cmd) {
2880 case SSL_CTRL_SET_GROUPS_LIST:
2881 return tls1_set_groups_list(ctx, NULL, NULL, parg);
2882 case SSL_CTRL_SET_SIGALGS_LIST:
2883 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
2884 return tls1_set_sigalgs_list(NULL, parg, 0);
2885 default:
2886 return 0;
2887 }
2888 }
2889
2890 switch (cmd) {
2891 case SSL_CTRL_GET_READ_AHEAD:
2892 return ctx->read_ahead;
2893 case SSL_CTRL_SET_READ_AHEAD:
2894 l = ctx->read_ahead;
2895 ctx->read_ahead = larg;
2896 return l;
2897
2898 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2899 ctx->msg_callback_arg = parg;
2900 return 1;
2901
2902 case SSL_CTRL_GET_MAX_CERT_LIST:
2903 return (long)ctx->max_cert_list;
2904 case SSL_CTRL_SET_MAX_CERT_LIST:
2905 if (larg < 0)
2906 return 0;
2907 l = (long)ctx->max_cert_list;
2908 ctx->max_cert_list = (size_t)larg;
2909 return l;
2910
2911 case SSL_CTRL_SET_SESS_CACHE_SIZE:
2912 if (larg < 0)
2913 return 0;
2914 l = (long)ctx->session_cache_size;
2915 ctx->session_cache_size = (size_t)larg;
2916 return l;
2917 case SSL_CTRL_GET_SESS_CACHE_SIZE:
2918 return (long)ctx->session_cache_size;
2919 case SSL_CTRL_SET_SESS_CACHE_MODE:
2920 l = ctx->session_cache_mode;
2921 ctx->session_cache_mode = larg;
2922 return l;
2923 case SSL_CTRL_GET_SESS_CACHE_MODE:
2924 return ctx->session_cache_mode;
2925
2926 case SSL_CTRL_SESS_NUMBER:
2927 return lh_SSL_SESSION_num_items(ctx->sessions);
2928 case SSL_CTRL_SESS_CONNECT:
2929 return ssl_tsan_load(ctx, &ctx->stats.sess_connect);
2930 case SSL_CTRL_SESS_CONNECT_GOOD:
2931 return ssl_tsan_load(ctx, &ctx->stats.sess_connect_good);
2932 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
2933 return ssl_tsan_load(ctx, &ctx->stats.sess_connect_renegotiate);
2934 case SSL_CTRL_SESS_ACCEPT:
2935 return ssl_tsan_load(ctx, &ctx->stats.sess_accept);
2936 case SSL_CTRL_SESS_ACCEPT_GOOD:
2937 return ssl_tsan_load(ctx, &ctx->stats.sess_accept_good);
2938 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
2939 return ssl_tsan_load(ctx, &ctx->stats.sess_accept_renegotiate);
2940 case SSL_CTRL_SESS_HIT:
2941 return ssl_tsan_load(ctx, &ctx->stats.sess_hit);
2942 case SSL_CTRL_SESS_CB_HIT:
2943 return ssl_tsan_load(ctx, &ctx->stats.sess_cb_hit);
2944 case SSL_CTRL_SESS_MISSES:
2945 return ssl_tsan_load(ctx, &ctx->stats.sess_miss);
2946 case SSL_CTRL_SESS_TIMEOUTS:
2947 return ssl_tsan_load(ctx, &ctx->stats.sess_timeout);
2948 case SSL_CTRL_SESS_CACHE_FULL:
2949 return ssl_tsan_load(ctx, &ctx->stats.sess_cache_full);
2950 case SSL_CTRL_MODE:
2951 return (ctx->mode |= larg);
2952 case SSL_CTRL_CLEAR_MODE:
2953 return (ctx->mode &= ~larg);
2954 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2955 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2956 return 0;
2957 ctx->max_send_fragment = larg;
2958 if (ctx->max_send_fragment < ctx->split_send_fragment)
2959 ctx->split_send_fragment = ctx->max_send_fragment;
2960 return 1;
2961 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2962 if ((size_t)larg > ctx->max_send_fragment || larg == 0)
2963 return 0;
2964 ctx->split_send_fragment = larg;
2965 return 1;
2966 case SSL_CTRL_SET_MAX_PIPELINES:
2967 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2968 return 0;
2969 ctx->max_pipelines = larg;
2970 return 1;
2971 case SSL_CTRL_CERT_FLAGS:
2972 return (ctx->cert->cert_flags |= larg);
2973 case SSL_CTRL_CLEAR_CERT_FLAGS:
2974 return (ctx->cert->cert_flags &= ~larg);
2975 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2976 return ssl_check_allowed_versions(larg, ctx->max_proto_version)
2977 && ssl_set_version_bound(ctx->method->version, (int)larg,
2978 &ctx->min_proto_version);
2979 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2980 return ctx->min_proto_version;
2981 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2982 return ssl_check_allowed_versions(ctx->min_proto_version, larg)
2983 && ssl_set_version_bound(ctx->method->version, (int)larg,
2984 &ctx->max_proto_version);
2985 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2986 return ctx->max_proto_version;
2987 default:
2988 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg);
2989 }
2990 }
2991
SSL_CTX_callback_ctrl(SSL_CTX * ctx,int cmd,void (* fp)(void))2992 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
2993 {
2994 switch (cmd) {
2995 case SSL_CTRL_SET_MSG_CALLBACK:
2996 ctx->msg_callback = (void (*)
2997 (int write_p, int version, int content_type,
2998 const void *buf, size_t len, SSL *ssl,
2999 void *arg))(fp);
3000 return 1;
3001
3002 default:
3003 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp);
3004 }
3005 }
3006
ssl_cipher_id_cmp(const SSL_CIPHER * a,const SSL_CIPHER * b)3007 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
3008 {
3009 if (a->id > b->id)
3010 return 1;
3011 if (a->id < b->id)
3012 return -1;
3013 return 0;
3014 }
3015
ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const * ap,const SSL_CIPHER * const * bp)3016 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
3017 const SSL_CIPHER *const *bp)
3018 {
3019 if ((*ap)->id > (*bp)->id)
3020 return 1;
3021 if ((*ap)->id < (*bp)->id)
3022 return -1;
3023 return 0;
3024 }
3025
3026 /*
3027 * return a STACK of the ciphers available for the SSL and in order of
3028 * preference
3029 */
STACK_OF(SSL_CIPHER)3030 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
3031 {
3032 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
3033
3034 if (sc != NULL) {
3035 if (sc->cipher_list != NULL) {
3036 return sc->cipher_list;
3037 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
3038 return s->ctx->cipher_list;
3039 }
3040 }
3041 return NULL;
3042 }
3043
STACK_OF(SSL_CIPHER)3044 STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
3045 {
3046 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
3047
3048 if (sc == NULL || !sc->server)
3049 return NULL;
3050 return sc->peer_ciphers;
3051 }
3052
STACK_OF(SSL_CIPHER)3053 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
3054 {
3055 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
3056 int i;
3057 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
3058
3059 if (sc == NULL)
3060 return NULL;
3061
3062 ciphers = SSL_get_ciphers(s);
3063 if (!ciphers)
3064 return NULL;
3065 if (!ssl_set_client_disabled(sc))
3066 return NULL;
3067 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
3068 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
3069 if (!ssl_cipher_disabled(sc, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) {
3070 if (!sk)
3071 sk = sk_SSL_CIPHER_new_null();
3072 if (!sk)
3073 return NULL;
3074 if (!sk_SSL_CIPHER_push(sk, c)) {
3075 sk_SSL_CIPHER_free(sk);
3076 return NULL;
3077 }
3078 }
3079 }
3080 return sk;
3081 }
3082
3083 /** return a STACK of the ciphers available for the SSL and in order of
3084 * algorithm id */
STACK_OF(SSL_CIPHER)3085 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL_CONNECTION *s)
3086 {
3087 if (s != NULL) {
3088 if (s->cipher_list_by_id != NULL)
3089 return s->cipher_list_by_id;
3090 else if (s->ssl.ctx != NULL
3091 && s->ssl.ctx->cipher_list_by_id != NULL)
3092 return s->ssl.ctx->cipher_list_by_id;
3093 }
3094 return NULL;
3095 }
3096
3097 /** The old interface to get the same thing as SSL_get_ciphers() */
SSL_get_cipher_list(const SSL * s,int n)3098 const char *SSL_get_cipher_list(const SSL *s, int n)
3099 {
3100 const SSL_CIPHER *c;
3101 STACK_OF(SSL_CIPHER) *sk;
3102
3103 if (s == NULL)
3104 return NULL;
3105 sk = SSL_get_ciphers(s);
3106 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
3107 return NULL;
3108 c = sk_SSL_CIPHER_value(sk, n);
3109 if (c == NULL)
3110 return NULL;
3111 return c->name;
3112 }
3113
3114 /** return a STACK of the ciphers available for the SSL_CTX and in order of
3115 * preference */
STACK_OF(SSL_CIPHER)3116 STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
3117 {
3118 if (ctx != NULL)
3119 return ctx->cipher_list;
3120 return NULL;
3121 }
3122
3123 /*
3124 * Distinguish between ciphers controlled by set_ciphersuite() and
3125 * set_cipher_list() when counting.
3126 */
cipher_list_tls12_num(STACK_OF (SSL_CIPHER)* sk)3127 static int cipher_list_tls12_num(STACK_OF(SSL_CIPHER) *sk)
3128 {
3129 int i, num = 0;
3130 const SSL_CIPHER *c;
3131
3132 if (sk == NULL)
3133 return 0;
3134 for (i = 0; i < sk_SSL_CIPHER_num(sk); ++i) {
3135 c = sk_SSL_CIPHER_value(sk, i);
3136 if (c->min_tls >= TLS1_3_VERSION)
3137 continue;
3138 num++;
3139 }
3140 return num;
3141 }
3142
3143 /** specify the ciphers to be used by default by the SSL_CTX */
SSL_CTX_set_cipher_list(SSL_CTX * ctx,const char * str)3144 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
3145 {
3146 STACK_OF(SSL_CIPHER) *sk;
3147
3148 sk = ssl_create_cipher_list(ctx, ctx->tls13_ciphersuites,
3149 &ctx->cipher_list, &ctx->cipher_list_by_id, str,
3150 ctx->cert);
3151 /*
3152 * ssl_create_cipher_list may return an empty stack if it was unable to
3153 * find a cipher matching the given rule string (for example if the rule
3154 * string specifies a cipher which has been disabled). This is not an
3155 * error as far as ssl_create_cipher_list is concerned, and hence
3156 * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
3157 */
3158 if (sk == NULL)
3159 return 0;
3160 else if (cipher_list_tls12_num(sk) == 0) {
3161 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH);
3162 return 0;
3163 }
3164 return 1;
3165 }
3166
3167 /** specify the ciphers to be used by the SSL */
SSL_set_cipher_list(SSL * s,const char * str)3168 int SSL_set_cipher_list(SSL *s, const char *str)
3169 {
3170 STACK_OF(SSL_CIPHER) *sk;
3171 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
3172
3173 if (sc == NULL)
3174 return 0;
3175
3176 sk = ssl_create_cipher_list(s->ctx, sc->tls13_ciphersuites,
3177 &sc->cipher_list, &sc->cipher_list_by_id, str,
3178 sc->cert);
3179 /* see comment in SSL_CTX_set_cipher_list */
3180 if (sk == NULL)
3181 return 0;
3182 else if (cipher_list_tls12_num(sk) == 0) {
3183 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH);
3184 return 0;
3185 }
3186 return 1;
3187 }
3188
SSL_get_shared_ciphers(const SSL * s,char * buf,int size)3189 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size)
3190 {
3191 char *p;
3192 STACK_OF(SSL_CIPHER) *clntsk, *srvrsk;
3193 const SSL_CIPHER *c;
3194 int i;
3195 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
3196
3197 if (sc == NULL)
3198 return NULL;
3199
3200 if (!sc->server
3201 || sc->peer_ciphers == NULL
3202 || size < 2)
3203 return NULL;
3204
3205 p = buf;
3206 clntsk = sc->peer_ciphers;
3207 srvrsk = SSL_get_ciphers(s);
3208 if (clntsk == NULL || srvrsk == NULL)
3209 return NULL;
3210
3211 if (sk_SSL_CIPHER_num(clntsk) == 0 || sk_SSL_CIPHER_num(srvrsk) == 0)
3212 return NULL;
3213
3214 for (i = 0; i < sk_SSL_CIPHER_num(clntsk); i++) {
3215 int n;
3216
3217 c = sk_SSL_CIPHER_value(clntsk, i);
3218 if (sk_SSL_CIPHER_find(srvrsk, c) < 0)
3219 continue;
3220
3221 n = strlen(c->name);
3222 if (n + 1 > size) {
3223 if (p != buf)
3224 --p;
3225 *p = '\0';
3226 return buf;
3227 }
3228 strcpy(p, c->name);
3229 p += n;
3230 *(p++) = ':';
3231 size -= n + 1;
3232 }
3233 p[-1] = '\0';
3234 return buf;
3235 }
3236
3237 /**
3238 * Return the requested servername (SNI) value. Note that the behaviour varies
3239 * depending on:
3240 * - whether this is called by the client or the server,
3241 * - if we are before or during/after the handshake,
3242 * - if a resumption or normal handshake is being attempted/has occurred
3243 * - whether we have negotiated TLSv1.2 (or below) or TLSv1.3
3244 *
3245 * Note that only the host_name type is defined (RFC 3546).
3246 */
SSL_get_servername(const SSL * s,const int type)3247 const char *SSL_get_servername(const SSL *s, const int type)
3248 {
3249 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
3250 int server;
3251
3252 if (sc == NULL)
3253 return NULL;
3254
3255 /*
3256 * If we don't know if we are the client or the server yet then we assume
3257 * client.
3258 */
3259 server = sc->handshake_func == NULL ? 0 : sc->server;
3260
3261 if (type != TLSEXT_NAMETYPE_host_name)
3262 return NULL;
3263
3264 if (server) {
3265 /**
3266 * Server side
3267 * In TLSv1.3 on the server SNI is not associated with the session
3268 * but in TLSv1.2 or below it is.
3269 *
3270 * Before the handshake:
3271 * - return NULL
3272 *
3273 * During/after the handshake (TLSv1.2 or below resumption occurred):
3274 * - If a servername was accepted by the server in the original
3275 * handshake then it will return that servername, or NULL otherwise.
3276 *
3277 * During/after the handshake (TLSv1.2 or below resumption did not occur):
3278 * - The function will return the servername requested by the client in
3279 * this handshake or NULL if none was requested.
3280 */
3281 if (sc->hit && !SSL_CONNECTION_IS_TLS13(sc))
3282 return sc->session->ext.hostname;
3283 } else {
3284 /**
3285 * Client side
3286 *
3287 * Before the handshake:
3288 * - If a servername has been set via a call to
3289 * SSL_set_tlsext_host_name() then it will return that servername
3290 * - If one has not been set, but a TLSv1.2 resumption is being
3291 * attempted and the session from the original handshake had a
3292 * servername accepted by the server then it will return that
3293 * servername
3294 * - Otherwise it returns NULL
3295 *
3296 * During/after the handshake (TLSv1.2 or below resumption occurred):
3297 * - If the session from the original handshake had a servername accepted
3298 * by the server then it will return that servername.
3299 * - Otherwise it returns the servername set via
3300 * SSL_set_tlsext_host_name() (or NULL if it was not called).
3301 *
3302 * During/after the handshake (TLSv1.2 or below resumption did not occur):
3303 * - It will return the servername set via SSL_set_tlsext_host_name()
3304 * (or NULL if it was not called).
3305 */
3306 if (SSL_in_before(s)) {
3307 if (sc->ext.hostname == NULL
3308 && sc->session != NULL
3309 && sc->session->ssl_version != TLS1_3_VERSION)
3310 return sc->session->ext.hostname;
3311 } else {
3312 if (!SSL_CONNECTION_IS_TLS13(sc) && sc->hit
3313 && sc->session->ext.hostname != NULL)
3314 return sc->session->ext.hostname;
3315 }
3316 }
3317
3318 return sc->ext.hostname;
3319 }
3320
SSL_get_servername_type(const SSL * s)3321 int SSL_get_servername_type(const SSL *s)
3322 {
3323 if (SSL_get_servername(s, TLSEXT_NAMETYPE_host_name) != NULL)
3324 return TLSEXT_NAMETYPE_host_name;
3325 return -1;
3326 }
3327
3328 /*
3329 * SSL_select_next_proto implements the standard protocol selection. It is
3330 * expected that this function is called from the callback set by
3331 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
3332 * vector of 8-bit, length prefixed byte strings. The length byte itself is
3333 * not included in the length. A byte string of length 0 is invalid. No byte
3334 * string may be truncated. The current, but experimental algorithm for
3335 * selecting the protocol is: 1) If the server doesn't support NPN then this
3336 * is indicated to the callback. In this case, the client application has to
3337 * abort the connection or have a default application level protocol. 2) If
3338 * the server supports NPN, but advertises an empty list then the client
3339 * selects the first protocol in its list, but indicates via the API that this
3340 * fallback case was enacted. 3) Otherwise, the client finds the first
3341 * protocol in the server's list that it supports and selects this protocol.
3342 * This is because it's assumed that the server has better information about
3343 * which protocol a client should use. 4) If the client doesn't support any
3344 * of the server's advertised protocols, then this is treated the same as
3345 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
3346 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
3347 */
SSL_select_next_proto(unsigned char ** out,unsigned char * outlen,const unsigned char * server,unsigned int server_len,const unsigned char * client,unsigned int client_len)3348 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
3349 const unsigned char *server,
3350 unsigned int server_len,
3351 const unsigned char *client, unsigned int client_len)
3352 {
3353 unsigned int i, j;
3354 const unsigned char *result;
3355 int status = OPENSSL_NPN_UNSUPPORTED;
3356
3357 /*
3358 * For each protocol in server preference order, see if we support it.
3359 */
3360 for (i = 0; i < server_len;) {
3361 for (j = 0; j < client_len;) {
3362 if (server[i] == client[j] &&
3363 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
3364 /* We found a match */
3365 result = &server[i];
3366 status = OPENSSL_NPN_NEGOTIATED;
3367 goto found;
3368 }
3369 j += client[j];
3370 j++;
3371 }
3372 i += server[i];
3373 i++;
3374 }
3375
3376 /* There's no overlap between our protocols and the server's list. */
3377 result = client;
3378 status = OPENSSL_NPN_NO_OVERLAP;
3379
3380 found:
3381 *out = (unsigned char *)result + 1;
3382 *outlen = result[0];
3383 return status;
3384 }
3385
3386 #ifndef OPENSSL_NO_NEXTPROTONEG
3387 /*
3388 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
3389 * client's requested protocol for this connection and returns 0. If the
3390 * client didn't request any protocol, then *data is set to NULL. Note that
3391 * the client can request any protocol it chooses. The value returned from
3392 * this function need not be a member of the list of supported protocols
3393 * provided by the callback.
3394 */
SSL_get0_next_proto_negotiated(const SSL * s,const unsigned char ** data,unsigned * len)3395 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
3396 unsigned *len)
3397 {
3398 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
3399
3400 if (sc == NULL) {
3401 /* We have no other way to indicate error */
3402 *data = NULL;
3403 *len = 0;
3404 return;
3405 }
3406
3407 *data = sc->ext.npn;
3408 if (*data == NULL) {
3409 *len = 0;
3410 } else {
3411 *len = (unsigned int)sc->ext.npn_len;
3412 }
3413 }
3414
3415 /*
3416 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
3417 * a TLS server needs a list of supported protocols for Next Protocol
3418 * Negotiation. The returned list must be in wire format. The list is
3419 * returned by setting |out| to point to it and |outlen| to its length. This
3420 * memory will not be modified, but one should assume that the SSL* keeps a
3421 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
3422 * wishes to advertise. Otherwise, no such extension will be included in the
3423 * ServerHello.
3424 */
SSL_CTX_set_npn_advertised_cb(SSL_CTX * ctx,SSL_CTX_npn_advertised_cb_func cb,void * arg)3425 void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
3426 SSL_CTX_npn_advertised_cb_func cb,
3427 void *arg)
3428 {
3429 ctx->ext.npn_advertised_cb = cb;
3430 ctx->ext.npn_advertised_cb_arg = arg;
3431 }
3432
3433 /*
3434 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
3435 * client needs to select a protocol from the server's provided list. |out|
3436 * must be set to point to the selected protocol (which may be within |in|).
3437 * The length of the protocol name must be written into |outlen|. The
3438 * server's advertised protocols are provided in |in| and |inlen|. The
3439 * callback can assume that |in| is syntactically valid. The client must
3440 * select a protocol. It is fatal to the connection if this callback returns
3441 * a value other than SSL_TLSEXT_ERR_OK.
3442 */
SSL_CTX_set_npn_select_cb(SSL_CTX * ctx,SSL_CTX_npn_select_cb_func cb,void * arg)3443 void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
3444 SSL_CTX_npn_select_cb_func cb,
3445 void *arg)
3446 {
3447 ctx->ext.npn_select_cb = cb;
3448 ctx->ext.npn_select_cb_arg = arg;
3449 }
3450 #endif
3451
alpn_value_ok(const unsigned char * protos,unsigned int protos_len)3452 static int alpn_value_ok(const unsigned char *protos, unsigned int protos_len)
3453 {
3454 unsigned int idx;
3455
3456 if (protos_len < 2 || protos == NULL)
3457 return 0;
3458
3459 for (idx = 0; idx < protos_len; idx += protos[idx] + 1) {
3460 if (protos[idx] == 0)
3461 return 0;
3462 }
3463 return idx == protos_len;
3464 }
3465 /*
3466 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
3467 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
3468 * length-prefixed strings). Returns 0 on success.
3469 */
SSL_CTX_set_alpn_protos(SSL_CTX * ctx,const unsigned char * protos,unsigned int protos_len)3470 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
3471 unsigned int protos_len)
3472 {
3473 unsigned char *alpn;
3474
3475 if (protos_len == 0 || protos == NULL) {
3476 OPENSSL_free(ctx->ext.alpn);
3477 ctx->ext.alpn = NULL;
3478 ctx->ext.alpn_len = 0;
3479 return 0;
3480 }
3481 /* Not valid per RFC */
3482 if (!alpn_value_ok(protos, protos_len))
3483 return 1;
3484
3485 alpn = OPENSSL_memdup(protos, protos_len);
3486 if (alpn == NULL) {
3487 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3488 return 1;
3489 }
3490 OPENSSL_free(ctx->ext.alpn);
3491 ctx->ext.alpn = alpn;
3492 ctx->ext.alpn_len = protos_len;
3493
3494 return 0;
3495 }
3496
3497 /*
3498 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
3499 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
3500 * length-prefixed strings). Returns 0 on success.
3501 */
SSL_set_alpn_protos(SSL * ssl,const unsigned char * protos,unsigned int protos_len)3502 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
3503 unsigned int protos_len)
3504 {
3505 unsigned char *alpn;
3506 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
3507
3508 if (sc == NULL)
3509 return 1;
3510
3511 if (protos_len == 0 || protos == NULL) {
3512 OPENSSL_free(sc->ext.alpn);
3513 sc->ext.alpn = NULL;
3514 sc->ext.alpn_len = 0;
3515 return 0;
3516 }
3517 /* Not valid per RFC */
3518 if (!alpn_value_ok(protos, protos_len))
3519 return 1;
3520
3521 alpn = OPENSSL_memdup(protos, protos_len);
3522 if (alpn == NULL) {
3523 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3524 return 1;
3525 }
3526 OPENSSL_free(sc->ext.alpn);
3527 sc->ext.alpn = alpn;
3528 sc->ext.alpn_len = protos_len;
3529
3530 return 0;
3531 }
3532
3533 /*
3534 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
3535 * called during ClientHello processing in order to select an ALPN protocol
3536 * from the client's list of offered protocols.
3537 */
SSL_CTX_set_alpn_select_cb(SSL_CTX * ctx,SSL_CTX_alpn_select_cb_func cb,void * arg)3538 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
3539 SSL_CTX_alpn_select_cb_func cb,
3540 void *arg)
3541 {
3542 ctx->ext.alpn_select_cb = cb;
3543 ctx->ext.alpn_select_cb_arg = arg;
3544 }
3545
3546 /*
3547 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
3548 * On return it sets |*data| to point to |*len| bytes of protocol name
3549 * (not including the leading length-prefix byte). If the server didn't
3550 * respond with a negotiated protocol then |*len| will be zero.
3551 */
SSL_get0_alpn_selected(const SSL * ssl,const unsigned char ** data,unsigned int * len)3552 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
3553 unsigned int *len)
3554 {
3555 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(ssl);
3556
3557 if (sc == NULL) {
3558 /* We have no other way to indicate error */
3559 *data = NULL;
3560 *len = 0;
3561 return;
3562 }
3563
3564 *data = sc->s3.alpn_selected;
3565 if (*data == NULL)
3566 *len = 0;
3567 else
3568 *len = (unsigned int)sc->s3.alpn_selected_len;
3569 }
3570
SSL_export_keying_material(SSL * s,unsigned char * out,size_t olen,const char * label,size_t llen,const unsigned char * context,size_t contextlen,int use_context)3571 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
3572 const char *label, size_t llen,
3573 const unsigned char *context, size_t contextlen,
3574 int use_context)
3575 {
3576 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
3577
3578 if (sc == NULL)
3579 return -1;
3580
3581 if (sc->session == NULL
3582 || (sc->version < TLS1_VERSION && sc->version != DTLS1_BAD_VER))
3583 return -1;
3584
3585 return s->method->ssl3_enc->export_keying_material(sc, out, olen, label,
3586 llen, context,
3587 contextlen, use_context);
3588 }
3589
SSL_export_keying_material_early(SSL * s,unsigned char * out,size_t olen,const char * label,size_t llen,const unsigned char * context,size_t contextlen)3590 int SSL_export_keying_material_early(SSL *s, unsigned char *out, size_t olen,
3591 const char *label, size_t llen,
3592 const unsigned char *context,
3593 size_t contextlen)
3594 {
3595 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
3596
3597 if (sc == NULL)
3598 return -1;
3599
3600 if (sc->version != TLS1_3_VERSION)
3601 return 0;
3602
3603 return tls13_export_keying_material_early(sc, out, olen, label, llen,
3604 context, contextlen);
3605 }
3606
ssl_session_hash(const SSL_SESSION * a)3607 static unsigned long ssl_session_hash(const SSL_SESSION *a)
3608 {
3609 const unsigned char *session_id = a->session_id;
3610 unsigned long l;
3611 unsigned char tmp_storage[4];
3612
3613 if (a->session_id_length < sizeof(tmp_storage)) {
3614 memset(tmp_storage, 0, sizeof(tmp_storage));
3615 memcpy(tmp_storage, a->session_id, a->session_id_length);
3616 session_id = tmp_storage;
3617 }
3618
3619 l = (unsigned long)
3620 ((unsigned long)session_id[0]) |
3621 ((unsigned long)session_id[1] << 8L) |
3622 ((unsigned long)session_id[2] << 16L) |
3623 ((unsigned long)session_id[3] << 24L);
3624 return l;
3625 }
3626
3627 /*
3628 * NB: If this function (or indeed the hash function which uses a sort of
3629 * coarser function than this one) is changed, ensure
3630 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
3631 * being able to construct an SSL_SESSION that will collide with any existing
3632 * session with a matching session ID.
3633 */
ssl_session_cmp(const SSL_SESSION * a,const SSL_SESSION * b)3634 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
3635 {
3636 if (a->ssl_version != b->ssl_version)
3637 return 1;
3638 if (a->session_id_length != b->session_id_length)
3639 return 1;
3640 return memcmp(a->session_id, b->session_id, a->session_id_length);
3641 }
3642
3643 /*
3644 * These wrapper functions should remain rather than redeclaring
3645 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
3646 * variable. The reason is that the functions aren't static, they're exposed
3647 * via ssl.h.
3648 */
3649
SSL_CTX_new_ex(OSSL_LIB_CTX * libctx,const char * propq,const SSL_METHOD * meth)3650 SSL_CTX *SSL_CTX_new_ex(OSSL_LIB_CTX *libctx, const char *propq,
3651 const SSL_METHOD *meth)
3652 {
3653 SSL_CTX *ret = NULL;
3654
3655 if (meth == NULL) {
3656 ERR_raise(ERR_LIB_SSL, SSL_R_NULL_SSL_METHOD_PASSED);
3657 return NULL;
3658 }
3659
3660 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
3661 return NULL;
3662
3663 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
3664 ERR_raise(ERR_LIB_SSL, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
3665 goto err;
3666 }
3667 ret = OPENSSL_zalloc(sizeof(*ret));
3668 if (ret == NULL)
3669 goto err;
3670
3671 /* Init the reference counting before any call to SSL_CTX_free */
3672 ret->references = 1;
3673 ret->lock = CRYPTO_THREAD_lock_new();
3674 if (ret->lock == NULL) {
3675 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3676 OPENSSL_free(ret);
3677 return NULL;
3678 }
3679
3680 #ifdef TSAN_REQUIRES_LOCKING
3681 ret->tsan_lock = CRYPTO_THREAD_lock_new();
3682 if (ret->tsan_lock == NULL) {
3683 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3684 goto err;
3685 }
3686 #endif
3687
3688 ret->libctx = libctx;
3689 if (propq != NULL) {
3690 ret->propq = OPENSSL_strdup(propq);
3691 if (ret->propq == NULL)
3692 goto err;
3693 }
3694
3695 ret->method = meth;
3696 ret->min_proto_version = 0;
3697 ret->max_proto_version = 0;
3698 ret->mode = SSL_MODE_AUTO_RETRY;
3699 ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
3700 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
3701 /* We take the system default. */
3702 ret->session_timeout = meth->get_timeout();
3703 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
3704 ret->verify_mode = SSL_VERIFY_NONE;
3705 if ((ret->cert = ssl_cert_new()) == NULL)
3706 goto err;
3707
3708 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
3709 if (ret->sessions == NULL)
3710 goto err;
3711 ret->cert_store = X509_STORE_new();
3712 if (ret->cert_store == NULL)
3713 goto err;
3714 #ifndef OPENSSL_NO_CT
3715 ret->ctlog_store = CTLOG_STORE_new_ex(libctx, propq);
3716 if (ret->ctlog_store == NULL)
3717 goto err;
3718 #endif
3719
3720 /* initialize cipher/digest methods table */
3721 if (!ssl_load_ciphers(ret))
3722 goto err2;
3723 /* initialise sig algs */
3724 if (!ssl_setup_sig_algs(ret))
3725 goto err2;
3726
3727
3728 if (!ssl_load_groups(ret))
3729 goto err2;
3730
3731 if (!SSL_CTX_set_ciphersuites(ret, OSSL_default_ciphersuites()))
3732 goto err;
3733
3734 if (!ssl_create_cipher_list(ret,
3735 ret->tls13_ciphersuites,
3736 &ret->cipher_list, &ret->cipher_list_by_id,
3737 OSSL_default_cipher_list(), ret->cert)
3738 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
3739 ERR_raise(ERR_LIB_SSL, SSL_R_LIBRARY_HAS_NO_CIPHERS);
3740 goto err2;
3741 }
3742
3743 ret->param = X509_VERIFY_PARAM_new();
3744 if (ret->param == NULL)
3745 goto err;
3746
3747 /*
3748 * If these aren't available from the provider we'll get NULL returns.
3749 * That's fine but will cause errors later if SSLv3 is negotiated
3750 */
3751 ret->md5 = ssl_evp_md_fetch(libctx, NID_md5, propq);
3752 ret->sha1 = ssl_evp_md_fetch(libctx, NID_sha1, propq);
3753
3754 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL)
3755 goto err;
3756
3757 if ((ret->client_ca_names = sk_X509_NAME_new_null()) == NULL)
3758 goto err;
3759
3760 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
3761 goto err;
3762
3763 if ((ret->ext.secure = OPENSSL_secure_zalloc(sizeof(*ret->ext.secure))) == NULL)
3764 goto err;
3765
3766 /* No compression for DTLS */
3767 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
3768 ret->comp_methods = SSL_COMP_get_compression_methods();
3769
3770 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3771 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3772
3773 /* Setup RFC5077 ticket keys */
3774 if ((RAND_bytes_ex(libctx, ret->ext.tick_key_name,
3775 sizeof(ret->ext.tick_key_name), 0) <= 0)
3776 || (RAND_priv_bytes_ex(libctx, ret->ext.secure->tick_hmac_key,
3777 sizeof(ret->ext.secure->tick_hmac_key), 0) <= 0)
3778 || (RAND_priv_bytes_ex(libctx, ret->ext.secure->tick_aes_key,
3779 sizeof(ret->ext.secure->tick_aes_key), 0) <= 0))
3780 ret->options |= SSL_OP_NO_TICKET;
3781
3782 if (RAND_priv_bytes_ex(libctx, ret->ext.cookie_hmac_key,
3783 sizeof(ret->ext.cookie_hmac_key), 0) <= 0)
3784 goto err;
3785
3786 #ifndef OPENSSL_NO_SRP
3787 if (!ssl_ctx_srp_ctx_init_intern(ret))
3788 goto err;
3789 #endif
3790 #ifndef OPENSSL_NO_ENGINE
3791 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
3792 # define eng_strx(x) #x
3793 # define eng_str(x) eng_strx(x)
3794 /* Use specific client engine automatically... ignore errors */
3795 {
3796 ENGINE *eng;
3797 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3798 if (!eng) {
3799 ERR_clear_error();
3800 ENGINE_load_builtin_engines();
3801 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3802 }
3803 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
3804 ERR_clear_error();
3805 }
3806 # endif
3807 #endif
3808 /*
3809 * Disable compression by default to prevent CRIME. Applications can
3810 * re-enable compression by configuring
3811 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
3812 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3
3813 * middlebox compatibility by default. This may be disabled by default in
3814 * a later OpenSSL version.
3815 */
3816 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT;
3817
3818 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
3819
3820 /*
3821 * We cannot usefully set a default max_early_data here (which gets
3822 * propagated in SSL_new(), for the following reason: setting the
3823 * SSL field causes tls_construct_stoc_early_data() to tell the
3824 * client that early data will be accepted when constructing a TLS 1.3
3825 * session ticket, and the client will accordingly send us early data
3826 * when using that ticket (if the client has early data to send).
3827 * However, in order for the early data to actually be consumed by
3828 * the application, the application must also have calls to
3829 * SSL_read_early_data(); otherwise we'll just skip past the early data
3830 * and ignore it. So, since the application must add calls to
3831 * SSL_read_early_data(), we also require them to add
3832 * calls to SSL_CTX_set_max_early_data() in order to use early data,
3833 * eliminating the bandwidth-wasting early data in the case described
3834 * above.
3835 */
3836 ret->max_early_data = 0;
3837
3838 /*
3839 * Default recv_max_early_data is a fully loaded single record. Could be
3840 * split across multiple records in practice. We set this differently to
3841 * max_early_data so that, in the default case, we do not advertise any
3842 * support for early_data, but if a client were to send us some (e.g.
3843 * because of an old, stale ticket) then we will tolerate it and skip over
3844 * it.
3845 */
3846 ret->recv_max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
3847
3848 /* By default we send two session tickets automatically in TLSv1.3 */
3849 ret->num_tickets = 2;
3850
3851 ssl_ctx_system_config(ret);
3852
3853 return ret;
3854 err:
3855 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3856 err2:
3857 SSL_CTX_free(ret);
3858 return NULL;
3859 }
3860
SSL_CTX_new(const SSL_METHOD * meth)3861 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
3862 {
3863 return SSL_CTX_new_ex(NULL, NULL, meth);
3864 }
3865
SSL_CTX_up_ref(SSL_CTX * ctx)3866 int SSL_CTX_up_ref(SSL_CTX *ctx)
3867 {
3868 int i;
3869
3870 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
3871 return 0;
3872
3873 REF_PRINT_COUNT("SSL_CTX", ctx);
3874 REF_ASSERT_ISNT(i < 2);
3875 return ((i > 1) ? 1 : 0);
3876 }
3877
SSL_CTX_free(SSL_CTX * a)3878 void SSL_CTX_free(SSL_CTX *a)
3879 {
3880 int i;
3881 size_t j;
3882
3883 if (a == NULL)
3884 return;
3885
3886 CRYPTO_DOWN_REF(&a->references, &i, a->lock);
3887 REF_PRINT_COUNT("SSL_CTX", a);
3888 if (i > 0)
3889 return;
3890 REF_ASSERT_ISNT(i < 0);
3891
3892 X509_VERIFY_PARAM_free(a->param);
3893 dane_ctx_final(&a->dane);
3894
3895 /*
3896 * Free internal session cache. However: the remove_cb() may reference
3897 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
3898 * after the sessions were flushed.
3899 * As the ex_data handling routines might also touch the session cache,
3900 * the most secure solution seems to be: empty (flush) the cache, then
3901 * free ex_data, then finally free the cache.
3902 * (See ticket [openssl.org #212].)
3903 */
3904 if (a->sessions != NULL)
3905 SSL_CTX_flush_sessions(a, 0);
3906
3907 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
3908 lh_SSL_SESSION_free(a->sessions);
3909 X509_STORE_free(a->cert_store);
3910 #ifndef OPENSSL_NO_CT
3911 CTLOG_STORE_free(a->ctlog_store);
3912 #endif
3913 sk_SSL_CIPHER_free(a->cipher_list);
3914 sk_SSL_CIPHER_free(a->cipher_list_by_id);
3915 sk_SSL_CIPHER_free(a->tls13_ciphersuites);
3916 ssl_cert_free(a->cert);
3917 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free);
3918 sk_X509_NAME_pop_free(a->client_ca_names, X509_NAME_free);
3919 OSSL_STACK_OF_X509_free(a->extra_certs);
3920 a->comp_methods = NULL;
3921 #ifndef OPENSSL_NO_SRTP
3922 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
3923 #endif
3924 #ifndef OPENSSL_NO_SRP
3925 ssl_ctx_srp_ctx_free_intern(a);
3926 #endif
3927 #ifndef OPENSSL_NO_ENGINE
3928 tls_engine_finish(a->client_cert_engine);
3929 #endif
3930
3931 OPENSSL_free(a->ext.ecpointformats);
3932 OPENSSL_free(a->ext.supportedgroups);
3933 OPENSSL_free(a->ext.supported_groups_default);
3934 OPENSSL_free(a->ext.alpn);
3935 OPENSSL_secure_free(a->ext.secure);
3936
3937 ssl_evp_md_free(a->md5);
3938 ssl_evp_md_free(a->sha1);
3939
3940 for (j = 0; j < SSL_ENC_NUM_IDX; j++)
3941 ssl_evp_cipher_free(a->ssl_cipher_methods[j]);
3942 for (j = 0; j < SSL_MD_NUM_IDX; j++)
3943 ssl_evp_md_free(a->ssl_digest_methods[j]);
3944 for (j = 0; j < a->group_list_len; j++) {
3945 OPENSSL_free(a->group_list[j].tlsname);
3946 OPENSSL_free(a->group_list[j].realname);
3947 OPENSSL_free(a->group_list[j].algorithm);
3948 }
3949 OPENSSL_free(a->group_list);
3950
3951 OPENSSL_free(a->sigalg_lookup_cache);
3952
3953 CRYPTO_THREAD_lock_free(a->lock);
3954 #ifdef TSAN_REQUIRES_LOCKING
3955 CRYPTO_THREAD_lock_free(a->tsan_lock);
3956 #endif
3957
3958 OPENSSL_free(a->propq);
3959
3960 OPENSSL_free(a);
3961 }
3962
SSL_CTX_set_default_passwd_cb(SSL_CTX * ctx,pem_password_cb * cb)3963 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
3964 {
3965 ctx->default_passwd_callback = cb;
3966 }
3967
SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX * ctx,void * u)3968 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
3969 {
3970 ctx->default_passwd_callback_userdata = u;
3971 }
3972
SSL_CTX_get_default_passwd_cb(SSL_CTX * ctx)3973 pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
3974 {
3975 return ctx->default_passwd_callback;
3976 }
3977
SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX * ctx)3978 void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
3979 {
3980 return ctx->default_passwd_callback_userdata;
3981 }
3982
SSL_set_default_passwd_cb(SSL * s,pem_password_cb * cb)3983 void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
3984 {
3985 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
3986
3987 if (sc == NULL)
3988 return;
3989
3990 sc->default_passwd_callback = cb;
3991 }
3992
SSL_set_default_passwd_cb_userdata(SSL * s,void * u)3993 void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
3994 {
3995 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
3996
3997 if (sc == NULL)
3998 return;
3999
4000 sc->default_passwd_callback_userdata = u;
4001 }
4002
SSL_get_default_passwd_cb(SSL * s)4003 pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
4004 {
4005 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4006
4007 if (sc == NULL)
4008 return NULL;
4009
4010 return sc->default_passwd_callback;
4011 }
4012
SSL_get_default_passwd_cb_userdata(SSL * s)4013 void *SSL_get_default_passwd_cb_userdata(SSL *s)
4014 {
4015 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4016
4017 if (sc == NULL)
4018 return NULL;
4019
4020 return sc->default_passwd_callback_userdata;
4021 }
4022
SSL_CTX_set_cert_verify_callback(SSL_CTX * ctx,int (* cb)(X509_STORE_CTX *,void *),void * arg)4023 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
4024 int (*cb) (X509_STORE_CTX *, void *),
4025 void *arg)
4026 {
4027 ctx->app_verify_callback = cb;
4028 ctx->app_verify_arg = arg;
4029 }
4030
SSL_CTX_set_verify(SSL_CTX * ctx,int mode,int (* cb)(int,X509_STORE_CTX *))4031 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
4032 int (*cb) (int, X509_STORE_CTX *))
4033 {
4034 ctx->verify_mode = mode;
4035 ctx->default_verify_callback = cb;
4036 }
4037
SSL_CTX_set_verify_depth(SSL_CTX * ctx,int depth)4038 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
4039 {
4040 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
4041 }
4042
SSL_CTX_set_cert_cb(SSL_CTX * c,int (* cb)(SSL * ssl,void * arg),void * arg)4043 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
4044 {
4045 ssl_cert_set_cert_cb(c->cert, cb, arg);
4046 }
4047
SSL_set_cert_cb(SSL * s,int (* cb)(SSL * ssl,void * arg),void * arg)4048 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
4049 {
4050 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4051
4052 if (sc == NULL)
4053 return;
4054
4055 ssl_cert_set_cert_cb(sc->cert, cb, arg);
4056 }
4057
ssl_set_masks(SSL_CONNECTION * s)4058 void ssl_set_masks(SSL_CONNECTION *s)
4059 {
4060 CERT *c = s->cert;
4061 uint32_t *pvalid = s->s3.tmp.valid_flags;
4062 int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
4063 unsigned long mask_k, mask_a;
4064 int have_ecc_cert, ecdsa_ok;
4065
4066 if (c == NULL)
4067 return;
4068
4069 dh_tmp = (c->dh_tmp != NULL
4070 || c->dh_tmp_cb != NULL
4071 || c->dh_tmp_auto);
4072
4073 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
4074 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
4075 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
4076 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
4077 mask_k = 0;
4078 mask_a = 0;
4079
4080 OSSL_TRACE4(TLS_CIPHER, "dh_tmp=%d rsa_enc=%d rsa_sign=%d dsa_sign=%d\n",
4081 dh_tmp, rsa_enc, rsa_sign, dsa_sign);
4082
4083 #ifndef OPENSSL_NO_GOST
4084 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
4085 mask_k |= SSL_kGOST | SSL_kGOST18;
4086 mask_a |= SSL_aGOST12;
4087 }
4088 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
4089 mask_k |= SSL_kGOST | SSL_kGOST18;
4090 mask_a |= SSL_aGOST12;
4091 }
4092 if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
4093 mask_k |= SSL_kGOST;
4094 mask_a |= SSL_aGOST01;
4095 }
4096 #endif
4097
4098 if (rsa_enc)
4099 mask_k |= SSL_kRSA;
4100
4101 if (dh_tmp)
4102 mask_k |= SSL_kDHE;
4103
4104 /*
4105 * If we only have an RSA-PSS certificate allow RSA authentication
4106 * if TLS 1.2 and peer supports it.
4107 */
4108
4109 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN)
4110 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN
4111 && TLS1_get_version(&s->ssl) == TLS1_2_VERSION))
4112 mask_a |= SSL_aRSA;
4113
4114 if (dsa_sign) {
4115 mask_a |= SSL_aDSS;
4116 }
4117
4118 mask_a |= SSL_aNULL;
4119
4120 /*
4121 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
4122 * depending on the key usage extension.
4123 */
4124 if (have_ecc_cert) {
4125 uint32_t ex_kusage;
4126 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
4127 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
4128 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
4129 ecdsa_ok = 0;
4130 if (ecdsa_ok)
4131 mask_a |= SSL_aECDSA;
4132 }
4133 /* Allow Ed25519 for TLS 1.2 if peer supports it */
4134 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519)
4135 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
4136 && TLS1_get_version(&s->ssl) == TLS1_2_VERSION)
4137 mask_a |= SSL_aECDSA;
4138
4139 /* Allow Ed448 for TLS 1.2 if peer supports it */
4140 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448)
4141 && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN
4142 && TLS1_get_version(&s->ssl) == TLS1_2_VERSION)
4143 mask_a |= SSL_aECDSA;
4144
4145 mask_k |= SSL_kECDHE;
4146
4147 #ifndef OPENSSL_NO_PSK
4148 mask_k |= SSL_kPSK;
4149 mask_a |= SSL_aPSK;
4150 if (mask_k & SSL_kRSA)
4151 mask_k |= SSL_kRSAPSK;
4152 if (mask_k & SSL_kDHE)
4153 mask_k |= SSL_kDHEPSK;
4154 if (mask_k & SSL_kECDHE)
4155 mask_k |= SSL_kECDHEPSK;
4156 #endif
4157
4158 s->s3.tmp.mask_k = mask_k;
4159 s->s3.tmp.mask_a = mask_a;
4160 }
4161
ssl_check_srvr_ecc_cert_and_alg(X509 * x,SSL_CONNECTION * s)4162 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL_CONNECTION *s)
4163 {
4164 if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
4165 /* key usage, if present, must allow signing */
4166 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
4167 ERR_raise(ERR_LIB_SSL, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
4168 return 0;
4169 }
4170 }
4171 return 1; /* all checks are ok */
4172 }
4173
ssl_get_server_cert_serverinfo(SSL_CONNECTION * s,const unsigned char ** serverinfo,size_t * serverinfo_length)4174 int ssl_get_server_cert_serverinfo(SSL_CONNECTION *s,
4175 const unsigned char **serverinfo,
4176 size_t *serverinfo_length)
4177 {
4178 CERT_PKEY *cpk = s->s3.tmp.cert;
4179 *serverinfo_length = 0;
4180
4181 if (cpk == NULL || cpk->serverinfo == NULL)
4182 return 0;
4183
4184 *serverinfo = cpk->serverinfo;
4185 *serverinfo_length = cpk->serverinfo_length;
4186 return 1;
4187 }
4188
ssl_update_cache(SSL_CONNECTION * s,int mode)4189 void ssl_update_cache(SSL_CONNECTION *s, int mode)
4190 {
4191 int i;
4192
4193 /*
4194 * If the session_id_length is 0, we are not supposed to cache it, and it
4195 * would be rather hard to do anyway :-)
4196 */
4197 if (s->session->session_id_length == 0)
4198 return;
4199
4200 /*
4201 * If sid_ctx_length is 0 there is no specific application context
4202 * associated with this session, so when we try to resume it and
4203 * SSL_VERIFY_PEER is requested to verify the client identity, we have no
4204 * indication that this is actually a session for the proper application
4205 * context, and the *handshake* will fail, not just the resumption attempt.
4206 * Do not cache (on the server) these sessions that are not resumable
4207 * (clients can set SSL_VERIFY_PEER without needing a sid_ctx set).
4208 */
4209 if (s->server && s->session->sid_ctx_length == 0
4210 && (s->verify_mode & SSL_VERIFY_PEER) != 0)
4211 return;
4212
4213 i = s->session_ctx->session_cache_mode;
4214 if ((i & mode) != 0
4215 && (!s->hit || SSL_CONNECTION_IS_TLS13(s))) {
4216 /*
4217 * Add the session to the internal cache. In server side TLSv1.3 we
4218 * normally don't do this because by default it's a full stateless ticket
4219 * with only a dummy session id so there is no reason to cache it,
4220 * unless:
4221 * - we are doing early_data, in which case we cache so that we can
4222 * detect replays
4223 * - the application has set a remove_session_cb so needs to know about
4224 * session timeout events
4225 * - SSL_OP_NO_TICKET is set in which case it is a stateful ticket
4226 */
4227 if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0
4228 && (!SSL_CONNECTION_IS_TLS13(s)
4229 || !s->server
4230 || (s->max_early_data > 0
4231 && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)
4232 || s->session_ctx->remove_session_cb != NULL
4233 || (s->options & SSL_OP_NO_TICKET) != 0))
4234 SSL_CTX_add_session(s->session_ctx, s->session);
4235
4236 /*
4237 * Add the session to the external cache. We do this even in server side
4238 * TLSv1.3 without early data because some applications just want to
4239 * know about the creation of a session and aren't doing a full cache.
4240 */
4241 if (s->session_ctx->new_session_cb != NULL) {
4242 SSL_SESSION_up_ref(s->session);
4243 if (!s->session_ctx->new_session_cb(SSL_CONNECTION_GET_SSL(s),
4244 s->session))
4245 SSL_SESSION_free(s->session);
4246 }
4247 }
4248
4249 /* auto flush every 255 connections */
4250 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
4251 TSAN_QUALIFIER int *stat;
4252
4253 if (mode & SSL_SESS_CACHE_CLIENT)
4254 stat = &s->session_ctx->stats.sess_connect_good;
4255 else
4256 stat = &s->session_ctx->stats.sess_accept_good;
4257 if ((ssl_tsan_load(s->session_ctx, stat) & 0xff) == 0xff)
4258 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
4259 }
4260 }
4261
SSL_CTX_get_ssl_method(const SSL_CTX * ctx)4262 const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx)
4263 {
4264 return ctx->method;
4265 }
4266
SSL_get_ssl_method(const SSL * s)4267 const SSL_METHOD *SSL_get_ssl_method(const SSL *s)
4268 {
4269 return s->method;
4270 }
4271
SSL_set_ssl_method(SSL * s,const SSL_METHOD * meth)4272 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
4273 {
4274 int ret = 1;
4275 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4276
4277 /* TODO(QUIC): Do we want this for QUIC? */
4278 if (sc == NULL
4279 || (s->type != SSL_TYPE_SSL_CONNECTION && s->method != meth))
4280 return 0;
4281
4282 if (s->method != meth) {
4283 const SSL_METHOD *sm = s->method;
4284 int (*hf) (SSL *) = sc->handshake_func;
4285
4286 if (sm->version == meth->version)
4287 s->method = meth;
4288 else {
4289 sm->ssl_deinit(s);
4290 s->method = meth;
4291 ret = s->method->ssl_init(s);
4292 }
4293
4294 if (hf == sm->ssl_connect)
4295 sc->handshake_func = meth->ssl_connect;
4296 else if (hf == sm->ssl_accept)
4297 sc->handshake_func = meth->ssl_accept;
4298 }
4299 return ret;
4300 }
4301
SSL_get_error(const SSL * s,int i)4302 int SSL_get_error(const SSL *s, int i)
4303 {
4304 int reason;
4305 unsigned long l;
4306 BIO *bio;
4307 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
4308
4309 if (i > 0)
4310 return SSL_ERROR_NONE;
4311
4312 /* TODO(QUIC): This will need more handling for QUIC_CONNECTIONs */
4313 if (sc == NULL)
4314 return SSL_ERROR_SSL;
4315
4316 /*
4317 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
4318 * where we do encode the error
4319 */
4320 if ((l = ERR_peek_error()) != 0) {
4321 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
4322 return SSL_ERROR_SYSCALL;
4323 else
4324 return SSL_ERROR_SSL;
4325 }
4326
4327 if (SSL_want_read(s)) {
4328 bio = SSL_get_rbio(s);
4329 if (BIO_should_read(bio))
4330 return SSL_ERROR_WANT_READ;
4331 else if (BIO_should_write(bio))
4332 /*
4333 * This one doesn't make too much sense ... We never try to write
4334 * to the rbio, and an application program where rbio and wbio
4335 * are separate couldn't even know what it should wait for.
4336 * However if we ever set s->rwstate incorrectly (so that we have
4337 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
4338 * wbio *are* the same, this test works around that bug; so it
4339 * might be safer to keep it.
4340 */
4341 return SSL_ERROR_WANT_WRITE;
4342 else if (BIO_should_io_special(bio)) {
4343 reason = BIO_get_retry_reason(bio);
4344 if (reason == BIO_RR_CONNECT)
4345 return SSL_ERROR_WANT_CONNECT;
4346 else if (reason == BIO_RR_ACCEPT)
4347 return SSL_ERROR_WANT_ACCEPT;
4348 else
4349 return SSL_ERROR_SYSCALL; /* unknown */
4350 }
4351 }
4352
4353 if (SSL_want_write(s)) {
4354 /* Access wbio directly - in order to use the buffered bio if present */
4355 bio = sc->wbio;
4356 if (BIO_should_write(bio))
4357 return SSL_ERROR_WANT_WRITE;
4358 else if (BIO_should_read(bio))
4359 /*
4360 * See above (SSL_want_read(s) with BIO_should_write(bio))
4361 */
4362 return SSL_ERROR_WANT_READ;
4363 else if (BIO_should_io_special(bio)) {
4364 reason = BIO_get_retry_reason(bio);
4365 if (reason == BIO_RR_CONNECT)
4366 return SSL_ERROR_WANT_CONNECT;
4367 else if (reason == BIO_RR_ACCEPT)
4368 return SSL_ERROR_WANT_ACCEPT;
4369 else
4370 return SSL_ERROR_SYSCALL;
4371 }
4372 }
4373 if (SSL_want_x509_lookup(s))
4374 return SSL_ERROR_WANT_X509_LOOKUP;
4375 if (SSL_want_retry_verify(s))
4376 return SSL_ERROR_WANT_RETRY_VERIFY;
4377 if (SSL_want_async(s))
4378 return SSL_ERROR_WANT_ASYNC;
4379 if (SSL_want_async_job(s))
4380 return SSL_ERROR_WANT_ASYNC_JOB;
4381 if (SSL_want_client_hello_cb(s))
4382 return SSL_ERROR_WANT_CLIENT_HELLO_CB;
4383
4384 if ((sc->shutdown & SSL_RECEIVED_SHUTDOWN) &&
4385 (sc->s3.warn_alert == SSL_AD_CLOSE_NOTIFY))
4386 return SSL_ERROR_ZERO_RETURN;
4387
4388 return SSL_ERROR_SYSCALL;
4389 }
4390
ssl_do_handshake_intern(void * vargs)4391 static int ssl_do_handshake_intern(void *vargs)
4392 {
4393 struct ssl_async_args *args = (struct ssl_async_args *)vargs;
4394 SSL *s = args->s;
4395 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4396
4397 if (sc == NULL)
4398 return -1;
4399
4400 return sc->handshake_func(s);
4401 }
4402
SSL_do_handshake(SSL * s)4403 int SSL_do_handshake(SSL *s)
4404 {
4405 int ret = 1;
4406 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4407
4408 /* TODO(QUIC): Special handling for QUIC will be needed */
4409 if (sc == NULL)
4410 return -1;
4411
4412 if (sc->handshake_func == NULL) {
4413 ERR_raise(ERR_LIB_SSL, SSL_R_CONNECTION_TYPE_NOT_SET);
4414 return -1;
4415 }
4416
4417 ossl_statem_check_finish_init(sc, -1);
4418
4419 s->method->ssl_renegotiate_check(s, 0);
4420
4421 if (SSL_in_init(s) || SSL_in_before(s)) {
4422 if ((sc->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
4423 struct ssl_async_args args;
4424
4425 memset(&args, 0, sizeof(args));
4426 args.s = s;
4427
4428 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
4429 } else {
4430 ret = sc->handshake_func(s);
4431 }
4432 }
4433 return ret;
4434 }
4435
SSL_set_accept_state(SSL * s)4436 void SSL_set_accept_state(SSL *s)
4437 {
4438 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4439
4440 /* TODO(QUIC): Special handling for QUIC will be needed */
4441 if (sc == NULL)
4442 return;
4443
4444 sc->server = 1;
4445 sc->shutdown = 0;
4446 ossl_statem_clear(sc);
4447 sc->handshake_func = s->method->ssl_accept;
4448 clear_ciphers(sc);
4449 }
4450
SSL_set_connect_state(SSL * s)4451 void SSL_set_connect_state(SSL *s)
4452 {
4453 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4454
4455 /* TODO(QUIC): Special handling for QUIC will be needed */
4456 if (sc == NULL)
4457 return;
4458
4459 sc->server = 0;
4460 sc->shutdown = 0;
4461 ossl_statem_clear(sc);
4462 sc->handshake_func = s->method->ssl_connect;
4463 clear_ciphers(sc);
4464 }
4465
ssl_undefined_function(SSL * s)4466 int ssl_undefined_function(SSL *s)
4467 {
4468 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
4469 return 0;
4470 }
4471
ssl_undefined_void_function(void)4472 int ssl_undefined_void_function(void)
4473 {
4474 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
4475 return 0;
4476 }
4477
ssl_undefined_const_function(const SSL * s)4478 int ssl_undefined_const_function(const SSL *s)
4479 {
4480 return 0;
4481 }
4482
ssl_bad_method(int ver)4483 const SSL_METHOD *ssl_bad_method(int ver)
4484 {
4485 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
4486 return NULL;
4487 }
4488
ssl_protocol_to_string(int version)4489 const char *ssl_protocol_to_string(int version)
4490 {
4491 switch (version)
4492 {
4493 case TLS1_3_VERSION:
4494 return "TLSv1.3";
4495
4496 case TLS1_2_VERSION:
4497 return "TLSv1.2";
4498
4499 case TLS1_1_VERSION:
4500 return "TLSv1.1";
4501
4502 case TLS1_VERSION:
4503 return "TLSv1";
4504
4505 case SSL3_VERSION:
4506 return "SSLv3";
4507
4508 case DTLS1_BAD_VER:
4509 return "DTLSv0.9";
4510
4511 case DTLS1_VERSION:
4512 return "DTLSv1";
4513
4514 case DTLS1_2_VERSION:
4515 return "DTLSv1.2";
4516
4517 default:
4518 return "unknown";
4519 }
4520 }
4521
SSL_get_version(const SSL * s)4522 const char *SSL_get_version(const SSL *s)
4523 {
4524 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
4525
4526 /* TODO(QUIC): Should QUIC return QUIC or TLSv1.3? */
4527 if (sc == NULL)
4528 return NULL;
4529
4530 return ssl_protocol_to_string(sc->version);
4531 }
4532
dup_ca_names(STACK_OF (X509_NAME)** dst,STACK_OF (X509_NAME)* src)4533 static int dup_ca_names(STACK_OF(X509_NAME) **dst, STACK_OF(X509_NAME) *src)
4534 {
4535 STACK_OF(X509_NAME) *sk;
4536 X509_NAME *xn;
4537 int i;
4538
4539 if (src == NULL) {
4540 *dst = NULL;
4541 return 1;
4542 }
4543
4544 if ((sk = sk_X509_NAME_new_null()) == NULL)
4545 return 0;
4546 for (i = 0; i < sk_X509_NAME_num(src); i++) {
4547 xn = X509_NAME_dup(sk_X509_NAME_value(src, i));
4548 if (xn == NULL) {
4549 sk_X509_NAME_pop_free(sk, X509_NAME_free);
4550 return 0;
4551 }
4552 if (sk_X509_NAME_insert(sk, xn, i) == 0) {
4553 X509_NAME_free(xn);
4554 sk_X509_NAME_pop_free(sk, X509_NAME_free);
4555 return 0;
4556 }
4557 }
4558 *dst = sk;
4559
4560 return 1;
4561 }
4562
SSL_dup(SSL * s)4563 SSL *SSL_dup(SSL *s)
4564 {
4565 SSL *ret;
4566 int i;
4567 /* TODO(QUIC): Add a SSL_METHOD function for duplication */
4568 SSL_CONNECTION *retsc;
4569 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
4570
4571 if (sc == NULL)
4572 return NULL;
4573
4574 /* If we're not quiescent, just up_ref! */
4575 if (!SSL_in_init(s) || !SSL_in_before(s)) {
4576 CRYPTO_UP_REF(&s->references, &i, s->lock);
4577 return s;
4578 }
4579
4580 /*
4581 * Otherwise, copy configuration state, and session if set.
4582 */
4583 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
4584 return NULL;
4585 if ((retsc = SSL_CONNECTION_FROM_SSL_ONLY(ret)) == NULL)
4586 goto err;
4587
4588 if (sc->session != NULL) {
4589 /*
4590 * Arranges to share the same session via up_ref. This "copies"
4591 * session-id, SSL_METHOD, sid_ctx, and 'cert'
4592 */
4593 if (!SSL_copy_session_id(ret, s))
4594 goto err;
4595 } else {
4596 /*
4597 * No session has been established yet, so we have to expect that
4598 * s->cert or ret->cert will be changed later -- they should not both
4599 * point to the same object, and thus we can't use
4600 * SSL_copy_session_id.
4601 */
4602 if (!SSL_set_ssl_method(ret, s->method))
4603 goto err;
4604
4605 if (sc->cert != NULL) {
4606 ssl_cert_free(retsc->cert);
4607 retsc->cert = ssl_cert_dup(sc->cert);
4608 if (retsc->cert == NULL)
4609 goto err;
4610 }
4611
4612 if (!SSL_set_session_id_context(ret, sc->sid_ctx,
4613 (int)sc->sid_ctx_length))
4614 goto err;
4615 }
4616
4617 if (!ssl_dane_dup(retsc, sc))
4618 goto err;
4619 retsc->version = sc->version;
4620 retsc->options = sc->options;
4621 retsc->min_proto_version = sc->min_proto_version;
4622 retsc->max_proto_version = sc->max_proto_version;
4623 retsc->mode = sc->mode;
4624 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
4625 SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
4626 retsc->msg_callback = sc->msg_callback;
4627 retsc->msg_callback_arg = sc->msg_callback_arg;
4628 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
4629 SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
4630 retsc->generate_session_id = sc->generate_session_id;
4631
4632 SSL_set_info_callback(ret, SSL_get_info_callback(s));
4633
4634 /* copy app data, a little dangerous perhaps */
4635 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
4636 goto err;
4637
4638 retsc->server = sc->server;
4639 if (sc->handshake_func) {
4640 if (sc->server)
4641 SSL_set_accept_state(ret);
4642 else
4643 SSL_set_connect_state(ret);
4644 }
4645 retsc->shutdown = sc->shutdown;
4646 retsc->hit = sc->hit;
4647
4648 retsc->default_passwd_callback = sc->default_passwd_callback;
4649 retsc->default_passwd_callback_userdata = sc->default_passwd_callback_userdata;
4650
4651 X509_VERIFY_PARAM_inherit(retsc->param, sc->param);
4652
4653 /* dup the cipher_list and cipher_list_by_id stacks */
4654 if (sc->cipher_list != NULL) {
4655 if ((retsc->cipher_list = sk_SSL_CIPHER_dup(sc->cipher_list)) == NULL)
4656 goto err;
4657 }
4658 if (sc->cipher_list_by_id != NULL)
4659 if ((retsc->cipher_list_by_id = sk_SSL_CIPHER_dup(sc->cipher_list_by_id))
4660 == NULL)
4661 goto err;
4662
4663 /* Dup the client_CA list */
4664 if (!dup_ca_names(&retsc->ca_names, sc->ca_names)
4665 || !dup_ca_names(&retsc->client_ca_names, sc->client_ca_names))
4666 goto err;
4667
4668 return ret;
4669
4670 err:
4671 SSL_free(ret);
4672 return NULL;
4673 }
4674
ssl_clear_cipher_ctx(SSL_CONNECTION * s)4675 void ssl_clear_cipher_ctx(SSL_CONNECTION *s)
4676 {
4677 if (s->enc_read_ctx != NULL) {
4678 EVP_CIPHER_CTX_free(s->enc_read_ctx);
4679 s->enc_read_ctx = NULL;
4680 }
4681 if (s->enc_write_ctx != NULL) {
4682 EVP_CIPHER_CTX_free(s->enc_write_ctx);
4683 s->enc_write_ctx = NULL;
4684 }
4685 #ifndef OPENSSL_NO_COMP
4686 COMP_CTX_free(s->expand);
4687 s->expand = NULL;
4688 COMP_CTX_free(s->compress);
4689 s->compress = NULL;
4690 #endif
4691 }
4692
SSL_get_certificate(const SSL * s)4693 X509 *SSL_get_certificate(const SSL *s)
4694 {
4695 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
4696
4697 if (sc == NULL)
4698 return NULL;
4699
4700 if (sc->cert != NULL)
4701 return sc->cert->key->x509;
4702 else
4703 return NULL;
4704 }
4705
SSL_get_privatekey(const SSL * s)4706 EVP_PKEY *SSL_get_privatekey(const SSL *s)
4707 {
4708 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
4709
4710 if (sc == NULL)
4711 return NULL;
4712
4713 if (sc->cert != NULL)
4714 return sc->cert->key->privatekey;
4715 else
4716 return NULL;
4717 }
4718
SSL_CTX_get0_certificate(const SSL_CTX * ctx)4719 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
4720 {
4721 if (ctx->cert != NULL)
4722 return ctx->cert->key->x509;
4723 else
4724 return NULL;
4725 }
4726
SSL_CTX_get0_privatekey(const SSL_CTX * ctx)4727 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
4728 {
4729 if (ctx->cert != NULL)
4730 return ctx->cert->key->privatekey;
4731 else
4732 return NULL;
4733 }
4734
SSL_get_current_cipher(const SSL * s)4735 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
4736 {
4737 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
4738
4739 if (sc == NULL)
4740 return NULL;
4741
4742 if ((sc->session != NULL) && (sc->session->cipher != NULL))
4743 return sc->session->cipher;
4744 return NULL;
4745 }
4746
SSL_get_pending_cipher(const SSL * s)4747 const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s)
4748 {
4749 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
4750
4751 if (sc == NULL)
4752 return NULL;
4753
4754 return sc->s3.tmp.new_cipher;
4755 }
4756
SSL_get_current_compression(const SSL * s)4757 const COMP_METHOD *SSL_get_current_compression(const SSL *s)
4758 {
4759 #ifndef OPENSSL_NO_COMP
4760 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL_ONLY(s);
4761
4762 if (sc == NULL)
4763 return NULL;
4764
4765 return sc->compress ? COMP_CTX_get_method(sc->compress) : NULL;
4766 #else
4767 return NULL;
4768 #endif
4769 }
4770
SSL_get_current_expansion(const SSL * s)4771 const COMP_METHOD *SSL_get_current_expansion(const SSL *s)
4772 {
4773 #ifndef OPENSSL_NO_COMP
4774 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL_ONLY(s);
4775
4776 if (sc == NULL)
4777 return NULL;
4778
4779 return sc->expand ? COMP_CTX_get_method(sc->expand) : NULL;
4780 #else
4781 return NULL;
4782 #endif
4783 }
4784
ssl_init_wbio_buffer(SSL_CONNECTION * s)4785 int ssl_init_wbio_buffer(SSL_CONNECTION *s)
4786 {
4787 BIO *bbio;
4788
4789 if (s->bbio != NULL) {
4790 /* Already buffered. */
4791 return 1;
4792 }
4793
4794 bbio = BIO_new(BIO_f_buffer());
4795 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) {
4796 BIO_free(bbio);
4797 ERR_raise(ERR_LIB_SSL, ERR_R_BUF_LIB);
4798 return 0;
4799 }
4800 s->bbio = bbio;
4801 s->wbio = BIO_push(bbio, s->wbio);
4802
4803 return 1;
4804 }
4805
ssl_free_wbio_buffer(SSL_CONNECTION * s)4806 int ssl_free_wbio_buffer(SSL_CONNECTION *s)
4807 {
4808 /* callers ensure s is never null */
4809 if (s->bbio == NULL)
4810 return 1;
4811
4812 s->wbio = BIO_pop(s->wbio);
4813 BIO_free(s->bbio);
4814 s->bbio = NULL;
4815
4816 return 1;
4817 }
4818
SSL_CTX_set_quiet_shutdown(SSL_CTX * ctx,int mode)4819 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
4820 {
4821 ctx->quiet_shutdown = mode;
4822 }
4823
SSL_CTX_get_quiet_shutdown(const SSL_CTX * ctx)4824 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
4825 {
4826 return ctx->quiet_shutdown;
4827 }
4828
SSL_set_quiet_shutdown(SSL * s,int mode)4829 void SSL_set_quiet_shutdown(SSL *s, int mode)
4830 {
4831 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
4832
4833 /* TODO(QUIC): Do we want this for QUIC? */
4834 if (sc == NULL)
4835 return;
4836
4837 sc->quiet_shutdown = mode;
4838 }
4839
SSL_get_quiet_shutdown(const SSL * s)4840 int SSL_get_quiet_shutdown(const SSL *s)
4841 {
4842 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL_ONLY(s);
4843
4844 /* TODO(QUIC): Do we want this for QUIC? */
4845 if (sc == NULL)
4846 return 0;
4847
4848 return sc->quiet_shutdown;
4849 }
4850
SSL_set_shutdown(SSL * s,int mode)4851 void SSL_set_shutdown(SSL *s, int mode)
4852 {
4853 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
4854
4855 /* TODO(QUIC): Do we want this for QUIC? */
4856 if (sc == NULL)
4857 return;
4858
4859 sc->shutdown = mode;
4860 }
4861
SSL_get_shutdown(const SSL * s)4862 int SSL_get_shutdown(const SSL *s)
4863 {
4864 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL_ONLY(s);
4865
4866 /* TODO(QUIC): Do we want this for QUIC? */
4867 if (sc == NULL)
4868 return 0;
4869
4870 return sc->shutdown;
4871 }
4872
SSL_version(const SSL * s)4873 int SSL_version(const SSL *s)
4874 {
4875 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
4876
4877 /* TODO(QUIC): Do we want to report QUIC version this way instead? */
4878 if (sc == NULL)
4879 return 0;
4880
4881 return sc->version;
4882 }
4883
SSL_client_version(const SSL * s)4884 int SSL_client_version(const SSL *s)
4885 {
4886 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
4887
4888 /* TODO(QUIC): Do we want to report QUIC version this way instead? */
4889 if (sc == NULL)
4890 return 0;
4891
4892 return sc->client_version;
4893 }
4894
SSL_get_SSL_CTX(const SSL * ssl)4895 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
4896 {
4897 return ssl->ctx;
4898 }
4899
SSL_set_SSL_CTX(SSL * ssl,SSL_CTX * ctx)4900 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
4901 {
4902 CERT *new_cert;
4903 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(ssl);
4904
4905 /* TODO(QUIC): Do we need this for QUIC support? */
4906 if (sc == NULL)
4907 return NULL;
4908
4909 if (ssl->ctx == ctx)
4910 return ssl->ctx;
4911 if (ctx == NULL)
4912 ctx = sc->session_ctx;
4913 new_cert = ssl_cert_dup(ctx->cert);
4914 if (new_cert == NULL) {
4915 return NULL;
4916 }
4917
4918 if (!custom_exts_copy_flags(&new_cert->custext, &sc->cert->custext)) {
4919 ssl_cert_free(new_cert);
4920 return NULL;
4921 }
4922
4923 ssl_cert_free(sc->cert);
4924 sc->cert = new_cert;
4925
4926 /*
4927 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
4928 * so setter APIs must prevent invalid lengths from entering the system.
4929 */
4930 if (!ossl_assert(sc->sid_ctx_length <= sizeof(sc->sid_ctx)))
4931 return NULL;
4932
4933 /*
4934 * If the session ID context matches that of the parent SSL_CTX,
4935 * inherit it from the new SSL_CTX as well. If however the context does
4936 * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
4937 * leave it unchanged.
4938 */
4939 if ((ssl->ctx != NULL) &&
4940 (sc->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
4941 (memcmp(sc->sid_ctx, ssl->ctx->sid_ctx, sc->sid_ctx_length) == 0)) {
4942 sc->sid_ctx_length = ctx->sid_ctx_length;
4943 memcpy(&sc->sid_ctx, &ctx->sid_ctx, sizeof(sc->sid_ctx));
4944 }
4945
4946 SSL_CTX_up_ref(ctx);
4947 SSL_CTX_free(ssl->ctx); /* decrement reference count */
4948 ssl->ctx = ctx;
4949
4950 return ssl->ctx;
4951 }
4952
SSL_CTX_set_default_verify_paths(SSL_CTX * ctx)4953 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
4954 {
4955 return X509_STORE_set_default_paths_ex(ctx->cert_store, ctx->libctx,
4956 ctx->propq);
4957 }
4958
SSL_CTX_set_default_verify_dir(SSL_CTX * ctx)4959 int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
4960 {
4961 X509_LOOKUP *lookup;
4962
4963 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
4964 if (lookup == NULL)
4965 return 0;
4966
4967 /* We ignore errors, in case the directory doesn't exist */
4968 ERR_set_mark();
4969
4970 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
4971
4972 ERR_pop_to_mark();
4973
4974 return 1;
4975 }
4976
SSL_CTX_set_default_verify_file(SSL_CTX * ctx)4977 int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
4978 {
4979 X509_LOOKUP *lookup;
4980
4981 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
4982 if (lookup == NULL)
4983 return 0;
4984
4985 /* We ignore errors, in case the file doesn't exist */
4986 ERR_set_mark();
4987
4988 X509_LOOKUP_load_file_ex(lookup, NULL, X509_FILETYPE_DEFAULT, ctx->libctx,
4989 ctx->propq);
4990
4991 ERR_pop_to_mark();
4992
4993 return 1;
4994 }
4995
SSL_CTX_set_default_verify_store(SSL_CTX * ctx)4996 int SSL_CTX_set_default_verify_store(SSL_CTX *ctx)
4997 {
4998 X509_LOOKUP *lookup;
4999
5000 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_store());
5001 if (lookup == NULL)
5002 return 0;
5003
5004 /* We ignore errors, in case the directory doesn't exist */
5005 ERR_set_mark();
5006
5007 X509_LOOKUP_add_store_ex(lookup, NULL, ctx->libctx, ctx->propq);
5008
5009 ERR_pop_to_mark();
5010
5011 return 1;
5012 }
5013
SSL_CTX_load_verify_file(SSL_CTX * ctx,const char * CAfile)5014 int SSL_CTX_load_verify_file(SSL_CTX *ctx, const char *CAfile)
5015 {
5016 return X509_STORE_load_file_ex(ctx->cert_store, CAfile, ctx->libctx,
5017 ctx->propq);
5018 }
5019
SSL_CTX_load_verify_dir(SSL_CTX * ctx,const char * CApath)5020 int SSL_CTX_load_verify_dir(SSL_CTX *ctx, const char *CApath)
5021 {
5022 return X509_STORE_load_path(ctx->cert_store, CApath);
5023 }
5024
SSL_CTX_load_verify_store(SSL_CTX * ctx,const char * CAstore)5025 int SSL_CTX_load_verify_store(SSL_CTX *ctx, const char *CAstore)
5026 {
5027 return X509_STORE_load_store_ex(ctx->cert_store, CAstore, ctx->libctx,
5028 ctx->propq);
5029 }
5030
SSL_CTX_load_verify_locations(SSL_CTX * ctx,const char * CAfile,const char * CApath)5031 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
5032 const char *CApath)
5033 {
5034 if (CAfile == NULL && CApath == NULL)
5035 return 0;
5036 if (CAfile != NULL && !SSL_CTX_load_verify_file(ctx, CAfile))
5037 return 0;
5038 if (CApath != NULL && !SSL_CTX_load_verify_dir(ctx, CApath))
5039 return 0;
5040 return 1;
5041 }
5042
SSL_set_info_callback(SSL * ssl,void (* cb)(const SSL * ssl,int type,int val))5043 void SSL_set_info_callback(SSL *ssl,
5044 void (*cb) (const SSL *ssl, int type, int val))
5045 {
5046 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
5047
5048 if (sc == NULL)
5049 return;
5050
5051 sc->info_callback = cb;
5052 }
5053
5054 /*
5055 * One compiler (Diab DCC) doesn't like argument names in returned function
5056 * pointer.
5057 */
SSL_get_info_callback(const SSL * ssl)5058 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
5059 int /* type */ ,
5060 int /* val */ ) {
5061 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(ssl);
5062
5063 if (sc == NULL)
5064 return NULL;
5065
5066 return sc->info_callback;
5067 }
5068
SSL_set_verify_result(SSL * ssl,long arg)5069 void SSL_set_verify_result(SSL *ssl, long arg)
5070 {
5071 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
5072
5073 if (sc == NULL)
5074 return;
5075
5076 sc->verify_result = arg;
5077 }
5078
SSL_get_verify_result(const SSL * ssl)5079 long SSL_get_verify_result(const SSL *ssl)
5080 {
5081 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(ssl);
5082
5083 if (sc == NULL)
5084 return 0;
5085
5086 return sc->verify_result;
5087 }
5088
SSL_get_client_random(const SSL * ssl,unsigned char * out,size_t outlen)5089 size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
5090 {
5091 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(ssl);
5092
5093 if (sc == NULL)
5094 return 0;
5095
5096 if (outlen == 0)
5097 return sizeof(sc->s3.client_random);
5098 if (outlen > sizeof(sc->s3.client_random))
5099 outlen = sizeof(sc->s3.client_random);
5100 memcpy(out, sc->s3.client_random, outlen);
5101 return outlen;
5102 }
5103
SSL_get_server_random(const SSL * ssl,unsigned char * out,size_t outlen)5104 size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
5105 {
5106 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(ssl);
5107
5108 if (sc == NULL)
5109 return 0;
5110
5111 if (outlen == 0)
5112 return sizeof(sc->s3.server_random);
5113 if (outlen > sizeof(sc->s3.server_random))
5114 outlen = sizeof(sc->s3.server_random);
5115 memcpy(out, sc->s3.server_random, outlen);
5116 return outlen;
5117 }
5118
SSL_SESSION_get_master_key(const SSL_SESSION * session,unsigned char * out,size_t outlen)5119 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
5120 unsigned char *out, size_t outlen)
5121 {
5122 if (outlen == 0)
5123 return session->master_key_length;
5124 if (outlen > session->master_key_length)
5125 outlen = session->master_key_length;
5126 memcpy(out, session->master_key, outlen);
5127 return outlen;
5128 }
5129
SSL_SESSION_set1_master_key(SSL_SESSION * sess,const unsigned char * in,size_t len)5130 int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in,
5131 size_t len)
5132 {
5133 if (len > sizeof(sess->master_key))
5134 return 0;
5135
5136 memcpy(sess->master_key, in, len);
5137 sess->master_key_length = len;
5138 return 1;
5139 }
5140
5141
SSL_set_ex_data(SSL * s,int idx,void * arg)5142 int SSL_set_ex_data(SSL *s, int idx, void *arg)
5143 {
5144 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
5145 }
5146
SSL_get_ex_data(const SSL * s,int idx)5147 void *SSL_get_ex_data(const SSL *s, int idx)
5148 {
5149 return CRYPTO_get_ex_data(&s->ex_data, idx);
5150 }
5151
SSL_CTX_set_ex_data(SSL_CTX * s,int idx,void * arg)5152 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
5153 {
5154 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
5155 }
5156
SSL_CTX_get_ex_data(const SSL_CTX * s,int idx)5157 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
5158 {
5159 return CRYPTO_get_ex_data(&s->ex_data, idx);
5160 }
5161
SSL_CTX_get_cert_store(const SSL_CTX * ctx)5162 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
5163 {
5164 return ctx->cert_store;
5165 }
5166
SSL_CTX_set_cert_store(SSL_CTX * ctx,X509_STORE * store)5167 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
5168 {
5169 X509_STORE_free(ctx->cert_store);
5170 ctx->cert_store = store;
5171 }
5172
SSL_CTX_set1_cert_store(SSL_CTX * ctx,X509_STORE * store)5173 void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
5174 {
5175 if (store != NULL)
5176 X509_STORE_up_ref(store);
5177 SSL_CTX_set_cert_store(ctx, store);
5178 }
5179
SSL_want(const SSL * s)5180 int SSL_want(const SSL *s)
5181 {
5182 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5183
5184 if (sc == NULL)
5185 return SSL_NOTHING;
5186
5187 return sc->rwstate;
5188 }
5189
5190 #ifndef OPENSSL_NO_PSK
SSL_CTX_use_psk_identity_hint(SSL_CTX * ctx,const char * identity_hint)5191 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
5192 {
5193 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
5194 ERR_raise(ERR_LIB_SSL, SSL_R_DATA_LENGTH_TOO_LONG);
5195 return 0;
5196 }
5197 OPENSSL_free(ctx->cert->psk_identity_hint);
5198 if (identity_hint != NULL) {
5199 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
5200 if (ctx->cert->psk_identity_hint == NULL)
5201 return 0;
5202 } else
5203 ctx->cert->psk_identity_hint = NULL;
5204 return 1;
5205 }
5206
SSL_use_psk_identity_hint(SSL * s,const char * identity_hint)5207 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
5208 {
5209 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5210
5211 if (sc == NULL)
5212 return 0;
5213
5214 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
5215 ERR_raise(ERR_LIB_SSL, SSL_R_DATA_LENGTH_TOO_LONG);
5216 return 0;
5217 }
5218 OPENSSL_free(sc->cert->psk_identity_hint);
5219 if (identity_hint != NULL) {
5220 sc->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
5221 if (sc->cert->psk_identity_hint == NULL)
5222 return 0;
5223 } else
5224 sc->cert->psk_identity_hint = NULL;
5225 return 1;
5226 }
5227
SSL_get_psk_identity_hint(const SSL * s)5228 const char *SSL_get_psk_identity_hint(const SSL *s)
5229 {
5230 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5231
5232 if (sc == NULL || sc->session == NULL)
5233 return NULL;
5234
5235 return sc->session->psk_identity_hint;
5236 }
5237
SSL_get_psk_identity(const SSL * s)5238 const char *SSL_get_psk_identity(const SSL *s)
5239 {
5240 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5241
5242 if (sc == NULL || sc->session == NULL)
5243 return NULL;
5244
5245 return sc->session->psk_identity;
5246 }
5247
SSL_set_psk_client_callback(SSL * s,SSL_psk_client_cb_func cb)5248 void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
5249 {
5250 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5251
5252 if (sc == NULL)
5253 return;
5254
5255 sc->psk_client_callback = cb;
5256 }
5257
SSL_CTX_set_psk_client_callback(SSL_CTX * ctx,SSL_psk_client_cb_func cb)5258 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
5259 {
5260 ctx->psk_client_callback = cb;
5261 }
5262
SSL_set_psk_server_callback(SSL * s,SSL_psk_server_cb_func cb)5263 void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
5264 {
5265 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5266
5267 if (sc == NULL)
5268 return;
5269
5270 sc->psk_server_callback = cb;
5271 }
5272
SSL_CTX_set_psk_server_callback(SSL_CTX * ctx,SSL_psk_server_cb_func cb)5273 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
5274 {
5275 ctx->psk_server_callback = cb;
5276 }
5277 #endif
5278
SSL_set_psk_find_session_callback(SSL * s,SSL_psk_find_session_cb_func cb)5279 void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb)
5280 {
5281 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5282
5283 if (sc == NULL)
5284 return;
5285
5286 sc->psk_find_session_cb = cb;
5287 }
5288
SSL_CTX_set_psk_find_session_callback(SSL_CTX * ctx,SSL_psk_find_session_cb_func cb)5289 void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
5290 SSL_psk_find_session_cb_func cb)
5291 {
5292 ctx->psk_find_session_cb = cb;
5293 }
5294
SSL_set_psk_use_session_callback(SSL * s,SSL_psk_use_session_cb_func cb)5295 void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
5296 {
5297 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5298
5299 if (sc == NULL)
5300 return;
5301
5302 sc->psk_use_session_cb = cb;
5303 }
5304
SSL_CTX_set_psk_use_session_callback(SSL_CTX * ctx,SSL_psk_use_session_cb_func cb)5305 void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx,
5306 SSL_psk_use_session_cb_func cb)
5307 {
5308 ctx->psk_use_session_cb = cb;
5309 }
5310
SSL_CTX_set_msg_callback(SSL_CTX * ctx,void (* cb)(int write_p,int version,int content_type,const void * buf,size_t len,SSL * ssl,void * arg))5311 void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
5312 void (*cb) (int write_p, int version,
5313 int content_type, const void *buf,
5314 size_t len, SSL *ssl, void *arg))
5315 {
5316 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
5317 }
5318
SSL_set_msg_callback(SSL * ssl,void (* cb)(int write_p,int version,int content_type,const void * buf,size_t len,SSL * ssl,void * arg))5319 void SSL_set_msg_callback(SSL *ssl,
5320 void (*cb) (int write_p, int version,
5321 int content_type, const void *buf,
5322 size_t len, SSL *ssl, void *arg))
5323 {
5324 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
5325 }
5326
SSL_CTX_set_not_resumable_session_callback(SSL_CTX * ctx,int (* cb)(SSL * ssl,int is_forward_secure))5327 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
5328 int (*cb) (SSL *ssl,
5329 int
5330 is_forward_secure))
5331 {
5332 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
5333 (void (*)(void))cb);
5334 }
5335
SSL_set_not_resumable_session_callback(SSL * ssl,int (* cb)(SSL * ssl,int is_forward_secure))5336 void SSL_set_not_resumable_session_callback(SSL *ssl,
5337 int (*cb) (SSL *ssl,
5338 int is_forward_secure))
5339 {
5340 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
5341 (void (*)(void))cb);
5342 }
5343
SSL_CTX_set_record_padding_callback(SSL_CTX * ctx,size_t (* cb)(SSL * ssl,int type,size_t len,void * arg))5344 void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx,
5345 size_t (*cb) (SSL *ssl, int type,
5346 size_t len, void *arg))
5347 {
5348 ctx->record_padding_cb = cb;
5349 }
5350
SSL_CTX_set_record_padding_callback_arg(SSL_CTX * ctx,void * arg)5351 void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg)
5352 {
5353 ctx->record_padding_arg = arg;
5354 }
5355
SSL_CTX_get_record_padding_callback_arg(const SSL_CTX * ctx)5356 void *SSL_CTX_get_record_padding_callback_arg(const SSL_CTX *ctx)
5357 {
5358 return ctx->record_padding_arg;
5359 }
5360
SSL_CTX_set_block_padding(SSL_CTX * ctx,size_t block_size)5361 int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size)
5362 {
5363 /* block size of 0 or 1 is basically no padding */
5364 if (block_size == 1)
5365 ctx->block_padding = 0;
5366 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
5367 ctx->block_padding = block_size;
5368 else
5369 return 0;
5370 return 1;
5371 }
5372
SSL_set_record_padding_callback(SSL * ssl,size_t (* cb)(SSL * ssl,int type,size_t len,void * arg))5373 int SSL_set_record_padding_callback(SSL *ssl,
5374 size_t (*cb) (SSL *ssl, int type,
5375 size_t len, void *arg))
5376 {
5377 BIO *b;
5378 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
5379
5380 if (sc == NULL)
5381 return 0;
5382
5383 b = SSL_get_wbio(ssl);
5384 if (b == NULL || !BIO_get_ktls_send(b)) {
5385 sc->record_padding_cb = cb;
5386 return 1;
5387 }
5388 return 0;
5389 }
5390
SSL_set_record_padding_callback_arg(SSL * ssl,void * arg)5391 void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg)
5392 {
5393 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
5394
5395 if (sc == NULL)
5396 return;
5397
5398 sc->record_padding_arg = arg;
5399 }
5400
SSL_get_record_padding_callback_arg(const SSL * ssl)5401 void *SSL_get_record_padding_callback_arg(const SSL *ssl)
5402 {
5403 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(ssl);
5404
5405 if (sc == NULL)
5406 return NULL;
5407
5408 return sc->record_padding_arg;
5409 }
5410
SSL_set_block_padding(SSL * ssl,size_t block_size)5411 int SSL_set_block_padding(SSL *ssl, size_t block_size)
5412 {
5413 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
5414
5415 if (sc == NULL)
5416 return 0;
5417
5418 /* block size of 0 or 1 is basically no padding */
5419 if (block_size == 1)
5420 sc->block_padding = 0;
5421 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
5422 sc->block_padding = block_size;
5423 else
5424 return 0;
5425 return 1;
5426 }
5427
SSL_set_num_tickets(SSL * s,size_t num_tickets)5428 int SSL_set_num_tickets(SSL *s, size_t num_tickets)
5429 {
5430 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5431
5432 if (sc == NULL)
5433 return 0;
5434
5435 sc->num_tickets = num_tickets;
5436
5437 return 1;
5438 }
5439
SSL_get_num_tickets(const SSL * s)5440 size_t SSL_get_num_tickets(const SSL *s)
5441 {
5442 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5443
5444 if (sc == NULL)
5445 return 0;
5446
5447 return sc->num_tickets;
5448 }
5449
SSL_CTX_set_num_tickets(SSL_CTX * ctx,size_t num_tickets)5450 int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets)
5451 {
5452 ctx->num_tickets = num_tickets;
5453
5454 return 1;
5455 }
5456
SSL_CTX_get_num_tickets(const SSL_CTX * ctx)5457 size_t SSL_CTX_get_num_tickets(const SSL_CTX *ctx)
5458 {
5459 return ctx->num_tickets;
5460 }
5461
5462 /*
5463 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
5464 * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
5465 * If EVP_MD pointer is passed, initializes ctx with this |md|.
5466 * Returns the newly allocated ctx;
5467 */
5468
ssl_replace_hash(EVP_MD_CTX ** hash,const EVP_MD * md)5469 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
5470 {
5471 ssl_clear_hash_ctx(hash);
5472 *hash = EVP_MD_CTX_new();
5473 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
5474 EVP_MD_CTX_free(*hash);
5475 *hash = NULL;
5476 return NULL;
5477 }
5478 return *hash;
5479 }
5480
ssl_clear_hash_ctx(EVP_MD_CTX ** hash)5481 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
5482 {
5483
5484 EVP_MD_CTX_free(*hash);
5485 *hash = NULL;
5486 }
5487
5488 /* Retrieve handshake hashes */
ssl_handshake_hash(SSL_CONNECTION * s,unsigned char * out,size_t outlen,size_t * hashlen)5489 int ssl_handshake_hash(SSL_CONNECTION *s,
5490 unsigned char *out, size_t outlen,
5491 size_t *hashlen)
5492 {
5493 EVP_MD_CTX *ctx = NULL;
5494 EVP_MD_CTX *hdgst = s->s3.handshake_dgst;
5495 int hashleni = EVP_MD_CTX_get_size(hdgst);
5496 int ret = 0;
5497
5498 if (hashleni < 0 || (size_t)hashleni > outlen) {
5499 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
5500 goto err;
5501 }
5502
5503 ctx = EVP_MD_CTX_new();
5504 if (ctx == NULL) {
5505 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
5506 goto err;
5507 }
5508
5509 if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
5510 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) {
5511 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
5512 goto err;
5513 }
5514
5515 *hashlen = hashleni;
5516
5517 ret = 1;
5518 err:
5519 EVP_MD_CTX_free(ctx);
5520 return ret;
5521 }
5522
SSL_session_reused(const SSL * s)5523 int SSL_session_reused(const SSL *s)
5524 {
5525 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5526
5527 if (sc == NULL)
5528 return 0;
5529
5530 return sc->hit;
5531 }
5532
SSL_is_server(const SSL * s)5533 int SSL_is_server(const SSL *s)
5534 {
5535 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5536
5537 if (sc == NULL)
5538 return 0;
5539
5540 return sc->server;
5541 }
5542
5543 #ifndef OPENSSL_NO_DEPRECATED_1_1_0
SSL_set_debug(SSL * s,int debug)5544 void SSL_set_debug(SSL *s, int debug)
5545 {
5546 /* Old function was do-nothing anyway... */
5547 (void)s;
5548 (void)debug;
5549 }
5550 #endif
5551
SSL_set_security_level(SSL * s,int level)5552 void SSL_set_security_level(SSL *s, int level)
5553 {
5554 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5555
5556 if (sc == NULL)
5557 return;
5558
5559 sc->cert->sec_level = level;
5560 }
5561
SSL_get_security_level(const SSL * s)5562 int SSL_get_security_level(const SSL *s)
5563 {
5564 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5565
5566 if (sc == NULL)
5567 return 0;
5568
5569 return sc->cert->sec_level;
5570 }
5571
SSL_set_security_callback(SSL * s,int (* cb)(const SSL * s,const SSL_CTX * ctx,int op,int bits,int nid,void * other,void * ex))5572 void SSL_set_security_callback(SSL *s,
5573 int (*cb) (const SSL *s, const SSL_CTX *ctx,
5574 int op, int bits, int nid,
5575 void *other, void *ex))
5576 {
5577 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5578
5579 if (sc == NULL)
5580 return;
5581
5582 sc->cert->sec_cb = cb;
5583 }
5584
SSL_get_security_callback(const SSL * s)5585 int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
5586 const SSL_CTX *ctx, int op,
5587 int bits, int nid, void *other,
5588 void *ex) {
5589 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5590
5591 if (sc == NULL)
5592 return NULL;
5593
5594 return sc->cert->sec_cb;
5595 }
5596
SSL_set0_security_ex_data(SSL * s,void * ex)5597 void SSL_set0_security_ex_data(SSL *s, void *ex)
5598 {
5599 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5600
5601 if (sc == NULL)
5602 return;
5603
5604 sc->cert->sec_ex = ex;
5605 }
5606
SSL_get0_security_ex_data(const SSL * s)5607 void *SSL_get0_security_ex_data(const SSL *s)
5608 {
5609 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5610
5611 if (sc == NULL)
5612 return NULL;
5613
5614 return sc->cert->sec_ex;
5615 }
5616
SSL_CTX_set_security_level(SSL_CTX * ctx,int level)5617 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
5618 {
5619 ctx->cert->sec_level = level;
5620 }
5621
SSL_CTX_get_security_level(const SSL_CTX * ctx)5622 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
5623 {
5624 return ctx->cert->sec_level;
5625 }
5626
SSL_CTX_set_security_callback(SSL_CTX * ctx,int (* cb)(const SSL * s,const SSL_CTX * ctx,int op,int bits,int nid,void * other,void * ex))5627 void SSL_CTX_set_security_callback(SSL_CTX *ctx,
5628 int (*cb) (const SSL *s, const SSL_CTX *ctx,
5629 int op, int bits, int nid,
5630 void *other, void *ex))
5631 {
5632 ctx->cert->sec_cb = cb;
5633 }
5634
SSL_CTX_get_security_callback(const SSL_CTX * ctx)5635 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
5636 const SSL_CTX *ctx,
5637 int op, int bits,
5638 int nid,
5639 void *other,
5640 void *ex) {
5641 return ctx->cert->sec_cb;
5642 }
5643
SSL_CTX_set0_security_ex_data(SSL_CTX * ctx,void * ex)5644 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
5645 {
5646 ctx->cert->sec_ex = ex;
5647 }
5648
SSL_CTX_get0_security_ex_data(const SSL_CTX * ctx)5649 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
5650 {
5651 return ctx->cert->sec_ex;
5652 }
5653
SSL_CTX_get_options(const SSL_CTX * ctx)5654 uint64_t SSL_CTX_get_options(const SSL_CTX *ctx)
5655 {
5656 return ctx->options;
5657 }
5658
SSL_get_options(const SSL * s)5659 uint64_t SSL_get_options(const SSL *s)
5660 {
5661 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5662
5663 if (sc == NULL)
5664 return 0;
5665
5666 return sc->options;
5667 }
5668
SSL_CTX_set_options(SSL_CTX * ctx,uint64_t op)5669 uint64_t SSL_CTX_set_options(SSL_CTX *ctx, uint64_t op)
5670 {
5671 return ctx->options |= op;
5672 }
5673
SSL_set_options(SSL * s,uint64_t op)5674 uint64_t SSL_set_options(SSL *s, uint64_t op)
5675 {
5676 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5677 OSSL_PARAM options[2], *opts = options;
5678
5679 if (sc == NULL)
5680 return 0;
5681
5682 sc->options |= op;
5683
5684 *opts++ = OSSL_PARAM_construct_uint64(OSSL_LIBSSL_RECORD_LAYER_PARAM_OPTIONS,
5685 &sc->options);
5686 *opts = OSSL_PARAM_construct_end();
5687
5688 /* Ignore return value */
5689 sc->rlayer.rrlmethod->set_options(sc->rlayer.rrl, options);
5690
5691 return sc->options;
5692 }
5693
SSL_CTX_clear_options(SSL_CTX * ctx,uint64_t op)5694 uint64_t SSL_CTX_clear_options(SSL_CTX *ctx, uint64_t op)
5695 {
5696 return ctx->options &= ~op;
5697 }
5698
SSL_clear_options(SSL * s,uint64_t op)5699 uint64_t SSL_clear_options(SSL *s, uint64_t op)
5700 {
5701 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5702
5703 if (sc == NULL)
5704 return 0;
5705
5706 return sc->options &= ~op;
5707 }
5708
STACK_OF(X509)5709 STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
5710 {
5711 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5712
5713 if (sc == NULL)
5714 return NULL;
5715
5716 return sc->verified_chain;
5717 }
5718
5719 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
5720
5721 #ifndef OPENSSL_NO_CT
5722
5723 /*
5724 * Moves SCTs from the |src| stack to the |dst| stack.
5725 * The source of each SCT will be set to |origin|.
5726 * If |dst| points to a NULL pointer, a new stack will be created and owned by
5727 * the caller.
5728 * Returns the number of SCTs moved, or a negative integer if an error occurs.
5729 */
ct_move_scts(STACK_OF (SCT)** dst,STACK_OF (SCT)* src,sct_source_t origin)5730 static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
5731 sct_source_t origin)
5732 {
5733 int scts_moved = 0;
5734 SCT *sct = NULL;
5735
5736 if (*dst == NULL) {
5737 *dst = sk_SCT_new_null();
5738 if (*dst == NULL) {
5739 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
5740 goto err;
5741 }
5742 }
5743
5744 while ((sct = sk_SCT_pop(src)) != NULL) {
5745 if (SCT_set_source(sct, origin) != 1)
5746 goto err;
5747
5748 if (sk_SCT_push(*dst, sct) <= 0)
5749 goto err;
5750 scts_moved += 1;
5751 }
5752
5753 return scts_moved;
5754 err:
5755 if (sct != NULL)
5756 sk_SCT_push(src, sct); /* Put the SCT back */
5757 return -1;
5758 }
5759
5760 /*
5761 * Look for data collected during ServerHello and parse if found.
5762 * Returns the number of SCTs extracted.
5763 */
ct_extract_tls_extension_scts(SSL_CONNECTION * s)5764 static int ct_extract_tls_extension_scts(SSL_CONNECTION *s)
5765 {
5766 int scts_extracted = 0;
5767
5768 if (s->ext.scts != NULL) {
5769 const unsigned char *p = s->ext.scts;
5770 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
5771
5772 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
5773
5774 SCT_LIST_free(scts);
5775 }
5776
5777 return scts_extracted;
5778 }
5779
5780 /*
5781 * Checks for an OCSP response and then attempts to extract any SCTs found if it
5782 * contains an SCT X509 extension. They will be stored in |s->scts|.
5783 * Returns:
5784 * - The number of SCTs extracted, assuming an OCSP response exists.
5785 * - 0 if no OCSP response exists or it contains no SCTs.
5786 * - A negative integer if an error occurs.
5787 */
ct_extract_ocsp_response_scts(SSL_CONNECTION * s)5788 static int ct_extract_ocsp_response_scts(SSL_CONNECTION *s)
5789 {
5790 # ifndef OPENSSL_NO_OCSP
5791 int scts_extracted = 0;
5792 const unsigned char *p;
5793 OCSP_BASICRESP *br = NULL;
5794 OCSP_RESPONSE *rsp = NULL;
5795 STACK_OF(SCT) *scts = NULL;
5796 int i;
5797
5798 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
5799 goto err;
5800
5801 p = s->ext.ocsp.resp;
5802 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
5803 if (rsp == NULL)
5804 goto err;
5805
5806 br = OCSP_response_get1_basic(rsp);
5807 if (br == NULL)
5808 goto err;
5809
5810 for (i = 0; i < OCSP_resp_count(br); ++i) {
5811 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
5812
5813 if (single == NULL)
5814 continue;
5815
5816 scts =
5817 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
5818 scts_extracted =
5819 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
5820 if (scts_extracted < 0)
5821 goto err;
5822 }
5823 err:
5824 SCT_LIST_free(scts);
5825 OCSP_BASICRESP_free(br);
5826 OCSP_RESPONSE_free(rsp);
5827 return scts_extracted;
5828 # else
5829 /* Behave as if no OCSP response exists */
5830 return 0;
5831 # endif
5832 }
5833
5834 /*
5835 * Attempts to extract SCTs from the peer certificate.
5836 * Return the number of SCTs extracted, or a negative integer if an error
5837 * occurs.
5838 */
ct_extract_x509v3_extension_scts(SSL_CONNECTION * s)5839 static int ct_extract_x509v3_extension_scts(SSL_CONNECTION *s)
5840 {
5841 int scts_extracted = 0;
5842 X509 *cert = s->session != NULL ? s->session->peer : NULL;
5843
5844 if (cert != NULL) {
5845 STACK_OF(SCT) *scts =
5846 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
5847
5848 scts_extracted =
5849 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
5850
5851 SCT_LIST_free(scts);
5852 }
5853
5854 return scts_extracted;
5855 }
5856
5857 /*
5858 * Attempts to find all received SCTs by checking TLS extensions, the OCSP
5859 * response (if it exists) and X509v3 extensions in the certificate.
5860 * Returns NULL if an error occurs.
5861 */
STACK_OF(SCT)5862 const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
5863 {
5864 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5865
5866 if (sc == NULL)
5867 return NULL;
5868
5869 if (!sc->scts_parsed) {
5870 if (ct_extract_tls_extension_scts(sc) < 0 ||
5871 ct_extract_ocsp_response_scts(sc) < 0 ||
5872 ct_extract_x509v3_extension_scts(sc) < 0)
5873 goto err;
5874
5875 sc->scts_parsed = 1;
5876 }
5877 return sc->scts;
5878 err:
5879 return NULL;
5880 }
5881
ct_permissive(const CT_POLICY_EVAL_CTX * ctx,const STACK_OF (SCT)* scts,void * unused_arg)5882 static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
5883 const STACK_OF(SCT) *scts, void *unused_arg)
5884 {
5885 return 1;
5886 }
5887
ct_strict(const CT_POLICY_EVAL_CTX * ctx,const STACK_OF (SCT)* scts,void * unused_arg)5888 static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
5889 const STACK_OF(SCT) *scts, void *unused_arg)
5890 {
5891 int count = scts != NULL ? sk_SCT_num(scts) : 0;
5892 int i;
5893
5894 for (i = 0; i < count; ++i) {
5895 SCT *sct = sk_SCT_value(scts, i);
5896 int status = SCT_get_validation_status(sct);
5897
5898 if (status == SCT_VALIDATION_STATUS_VALID)
5899 return 1;
5900 }
5901 ERR_raise(ERR_LIB_SSL, SSL_R_NO_VALID_SCTS);
5902 return 0;
5903 }
5904
SSL_set_ct_validation_callback(SSL * s,ssl_ct_validation_cb callback,void * arg)5905 int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
5906 void *arg)
5907 {
5908 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
5909
5910 if (sc == NULL)
5911 return 0;
5912
5913 /*
5914 * Since code exists that uses the custom extension handler for CT, look
5915 * for this and throw an error if they have already registered to use CT.
5916 */
5917 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
5918 TLSEXT_TYPE_signed_certificate_timestamp))
5919 {
5920 ERR_raise(ERR_LIB_SSL, SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
5921 return 0;
5922 }
5923
5924 if (callback != NULL) {
5925 /*
5926 * If we are validating CT, then we MUST accept SCTs served via OCSP
5927 */
5928 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
5929 return 0;
5930 }
5931
5932 sc->ct_validation_callback = callback;
5933 sc->ct_validation_callback_arg = arg;
5934
5935 return 1;
5936 }
5937
SSL_CTX_set_ct_validation_callback(SSL_CTX * ctx,ssl_ct_validation_cb callback,void * arg)5938 int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
5939 ssl_ct_validation_cb callback, void *arg)
5940 {
5941 /*
5942 * Since code exists that uses the custom extension handler for CT, look for
5943 * this and throw an error if they have already registered to use CT.
5944 */
5945 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
5946 TLSEXT_TYPE_signed_certificate_timestamp))
5947 {
5948 ERR_raise(ERR_LIB_SSL, SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
5949 return 0;
5950 }
5951
5952 ctx->ct_validation_callback = callback;
5953 ctx->ct_validation_callback_arg = arg;
5954 return 1;
5955 }
5956
SSL_ct_is_enabled(const SSL * s)5957 int SSL_ct_is_enabled(const SSL *s)
5958 {
5959 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
5960
5961 if (sc == NULL)
5962 return 0;
5963
5964 return sc->ct_validation_callback != NULL;
5965 }
5966
SSL_CTX_ct_is_enabled(const SSL_CTX * ctx)5967 int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
5968 {
5969 return ctx->ct_validation_callback != NULL;
5970 }
5971
ssl_validate_ct(SSL_CONNECTION * s)5972 int ssl_validate_ct(SSL_CONNECTION *s)
5973 {
5974 int ret = 0;
5975 X509 *cert = s->session != NULL ? s->session->peer : NULL;
5976 X509 *issuer;
5977 SSL_DANE *dane = &s->dane;
5978 CT_POLICY_EVAL_CTX *ctx = NULL;
5979 const STACK_OF(SCT) *scts;
5980
5981 /*
5982 * If no callback is set, the peer is anonymous, or its chain is invalid,
5983 * skip SCT validation - just return success. Applications that continue
5984 * handshakes without certificates, with unverified chains, or pinned leaf
5985 * certificates are outside the scope of the WebPKI and CT.
5986 *
5987 * The above exclusions notwithstanding the vast majority of peers will
5988 * have rather ordinary certificate chains validated by typical
5989 * applications that perform certificate verification and therefore will
5990 * process SCTs when enabled.
5991 */
5992 if (s->ct_validation_callback == NULL || cert == NULL ||
5993 s->verify_result != X509_V_OK ||
5994 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
5995 return 1;
5996
5997 /*
5998 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
5999 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2
6000 */
6001 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
6002 switch (dane->mtlsa->usage) {
6003 case DANETLS_USAGE_DANE_TA:
6004 case DANETLS_USAGE_DANE_EE:
6005 return 1;
6006 }
6007 }
6008
6009 ctx = CT_POLICY_EVAL_CTX_new_ex(SSL_CONNECTION_GET_CTX(s)->libctx,
6010 SSL_CONNECTION_GET_CTX(s)->propq);
6011 if (ctx == NULL) {
6012 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
6013 goto end;
6014 }
6015
6016 issuer = sk_X509_value(s->verified_chain, 1);
6017 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
6018 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
6019 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx,
6020 SSL_CONNECTION_GET_CTX(s)->ctlog_store);
6021 CT_POLICY_EVAL_CTX_set_time(
6022 ctx, (uint64_t)SSL_SESSION_get_time(s->session) * 1000);
6023
6024 scts = SSL_get0_peer_scts(SSL_CONNECTION_GET_SSL(s));
6025
6026 /*
6027 * This function returns success (> 0) only when all the SCTs are valid, 0
6028 * when some are invalid, and < 0 on various internal errors (out of
6029 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient
6030 * reason to abort the handshake, that decision is up to the callback.
6031 * Therefore, we error out only in the unexpected case that the return
6032 * value is negative.
6033 *
6034 * XXX: One might well argue that the return value of this function is an
6035 * unfortunate design choice. Its job is only to determine the validation
6036 * status of each of the provided SCTs. So long as it correctly separates
6037 * the wheat from the chaff it should return success. Failure in this case
6038 * ought to correspond to an inability to carry out its duties.
6039 */
6040 if (SCT_LIST_validate(scts, ctx) < 0) {
6041 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_SCT_VERIFICATION_FAILED);
6042 goto end;
6043 }
6044
6045 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
6046 if (ret < 0)
6047 ret = 0; /* This function returns 0 on failure */
6048 if (!ret)
6049 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_CALLBACK_FAILED);
6050
6051 end:
6052 CT_POLICY_EVAL_CTX_free(ctx);
6053 /*
6054 * With SSL_VERIFY_NONE the session may be cached and re-used despite a
6055 * failure return code here. Also the application may wish the complete
6056 * the handshake, and then disconnect cleanly at a higher layer, after
6057 * checking the verification status of the completed connection.
6058 *
6059 * We therefore force a certificate verification failure which will be
6060 * visible via SSL_get_verify_result() and cached as part of any resumed
6061 * session.
6062 *
6063 * Note: the permissive callback is for information gathering only, always
6064 * returns success, and does not affect verification status. Only the
6065 * strict callback or a custom application-specified callback can trigger
6066 * connection failure or record a verification error.
6067 */
6068 if (ret <= 0)
6069 s->verify_result = X509_V_ERR_NO_VALID_SCTS;
6070 return ret;
6071 }
6072
SSL_CTX_enable_ct(SSL_CTX * ctx,int validation_mode)6073 int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
6074 {
6075 switch (validation_mode) {
6076 default:
6077 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_CT_VALIDATION_TYPE);
6078 return 0;
6079 case SSL_CT_VALIDATION_PERMISSIVE:
6080 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
6081 case SSL_CT_VALIDATION_STRICT:
6082 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
6083 }
6084 }
6085
SSL_enable_ct(SSL * s,int validation_mode)6086 int SSL_enable_ct(SSL *s, int validation_mode)
6087 {
6088 switch (validation_mode) {
6089 default:
6090 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_CT_VALIDATION_TYPE);
6091 return 0;
6092 case SSL_CT_VALIDATION_PERMISSIVE:
6093 return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
6094 case SSL_CT_VALIDATION_STRICT:
6095 return SSL_set_ct_validation_callback(s, ct_strict, NULL);
6096 }
6097 }
6098
SSL_CTX_set_default_ctlog_list_file(SSL_CTX * ctx)6099 int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
6100 {
6101 return CTLOG_STORE_load_default_file(ctx->ctlog_store);
6102 }
6103
SSL_CTX_set_ctlog_list_file(SSL_CTX * ctx,const char * path)6104 int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
6105 {
6106 return CTLOG_STORE_load_file(ctx->ctlog_store, path);
6107 }
6108
SSL_CTX_set0_ctlog_store(SSL_CTX * ctx,CTLOG_STORE * logs)6109 void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
6110 {
6111 CTLOG_STORE_free(ctx->ctlog_store);
6112 ctx->ctlog_store = logs;
6113 }
6114
SSL_CTX_get0_ctlog_store(const SSL_CTX * ctx)6115 const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
6116 {
6117 return ctx->ctlog_store;
6118 }
6119
6120 #endif /* OPENSSL_NO_CT */
6121
SSL_CTX_set_client_hello_cb(SSL_CTX * c,SSL_client_hello_cb_fn cb,void * arg)6122 void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb,
6123 void *arg)
6124 {
6125 c->client_hello_cb = cb;
6126 c->client_hello_cb_arg = arg;
6127 }
6128
SSL_client_hello_isv2(SSL * s)6129 int SSL_client_hello_isv2(SSL *s)
6130 {
6131 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6132
6133 if (sc == NULL)
6134 return 0;
6135
6136 if (sc->clienthello == NULL)
6137 return 0;
6138 return sc->clienthello->isv2;
6139 }
6140
SSL_client_hello_get0_legacy_version(SSL * s)6141 unsigned int SSL_client_hello_get0_legacy_version(SSL *s)
6142 {
6143 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6144
6145 if (sc == NULL)
6146 return 0;
6147
6148 if (sc->clienthello == NULL)
6149 return 0;
6150 return sc->clienthello->legacy_version;
6151 }
6152
SSL_client_hello_get0_random(SSL * s,const unsigned char ** out)6153 size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out)
6154 {
6155 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6156
6157 if (sc == NULL)
6158 return 0;
6159
6160 if (sc->clienthello == NULL)
6161 return 0;
6162 if (out != NULL)
6163 *out = sc->clienthello->random;
6164 return SSL3_RANDOM_SIZE;
6165 }
6166
SSL_client_hello_get0_session_id(SSL * s,const unsigned char ** out)6167 size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out)
6168 {
6169 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6170
6171 if (sc == NULL)
6172 return 0;
6173
6174 if (sc->clienthello == NULL)
6175 return 0;
6176 if (out != NULL)
6177 *out = sc->clienthello->session_id;
6178 return sc->clienthello->session_id_len;
6179 }
6180
SSL_client_hello_get0_ciphers(SSL * s,const unsigned char ** out)6181 size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out)
6182 {
6183 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6184
6185 if (sc == NULL)
6186 return 0;
6187
6188 if (sc->clienthello == NULL)
6189 return 0;
6190 if (out != NULL)
6191 *out = PACKET_data(&sc->clienthello->ciphersuites);
6192 return PACKET_remaining(&sc->clienthello->ciphersuites);
6193 }
6194
SSL_client_hello_get0_compression_methods(SSL * s,const unsigned char ** out)6195 size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out)
6196 {
6197 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6198
6199 if (sc == NULL)
6200 return 0;
6201
6202 if (sc->clienthello == NULL)
6203 return 0;
6204 if (out != NULL)
6205 *out = sc->clienthello->compressions;
6206 return sc->clienthello->compressions_len;
6207 }
6208
SSL_client_hello_get1_extensions_present(SSL * s,int ** out,size_t * outlen)6209 int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen)
6210 {
6211 RAW_EXTENSION *ext;
6212 int *present;
6213 size_t num = 0, i;
6214 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6215
6216 if (sc == NULL)
6217 return 0;
6218
6219 if (sc->clienthello == NULL || out == NULL || outlen == NULL)
6220 return 0;
6221 for (i = 0; i < sc->clienthello->pre_proc_exts_len; i++) {
6222 ext = sc->clienthello->pre_proc_exts + i;
6223 if (ext->present)
6224 num++;
6225 }
6226 if (num == 0) {
6227 *out = NULL;
6228 *outlen = 0;
6229 return 1;
6230 }
6231 if ((present = OPENSSL_malloc(sizeof(*present) * num)) == NULL) {
6232 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
6233 return 0;
6234 }
6235 for (i = 0; i < sc->clienthello->pre_proc_exts_len; i++) {
6236 ext = sc->clienthello->pre_proc_exts + i;
6237 if (ext->present) {
6238 if (ext->received_order >= num)
6239 goto err;
6240 present[ext->received_order] = ext->type;
6241 }
6242 }
6243 *out = present;
6244 *outlen = num;
6245 return 1;
6246 err:
6247 OPENSSL_free(present);
6248 return 0;
6249 }
6250
SSL_client_hello_get_extension_order(SSL * s,uint16_t * exts,size_t * num_exts)6251 int SSL_client_hello_get_extension_order(SSL *s, uint16_t *exts, size_t *num_exts)
6252 {
6253 RAW_EXTENSION *ext;
6254 size_t num = 0, i;
6255 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6256
6257 if (sc == NULL)
6258 return 0;
6259
6260 if (sc->clienthello == NULL || num_exts == NULL)
6261 return 0;
6262 for (i = 0; i < sc->clienthello->pre_proc_exts_len; i++) {
6263 ext = sc->clienthello->pre_proc_exts + i;
6264 if (ext->present)
6265 num++;
6266 }
6267 if (num == 0) {
6268 *num_exts = 0;
6269 return 1;
6270 }
6271 if (exts == NULL) {
6272 *num_exts = num;
6273 return 1;
6274 }
6275 if (*num_exts < num)
6276 return 0;
6277 for (i = 0; i < sc->clienthello->pre_proc_exts_len; i++) {
6278 ext = sc->clienthello->pre_proc_exts + i;
6279 if (ext->present) {
6280 if (ext->received_order >= num)
6281 return 0;
6282 exts[ext->received_order] = ext->type;
6283 }
6284 }
6285 *num_exts = num;
6286 return 1;
6287 }
6288
SSL_client_hello_get0_ext(SSL * s,unsigned int type,const unsigned char ** out,size_t * outlen)6289 int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
6290 size_t *outlen)
6291 {
6292 size_t i;
6293 RAW_EXTENSION *r;
6294 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6295
6296 if (sc == NULL)
6297 return 0;
6298
6299 if (sc->clienthello == NULL)
6300 return 0;
6301 for (i = 0; i < sc->clienthello->pre_proc_exts_len; ++i) {
6302 r = sc->clienthello->pre_proc_exts + i;
6303 if (r->present && r->type == type) {
6304 if (out != NULL)
6305 *out = PACKET_data(&r->data);
6306 if (outlen != NULL)
6307 *outlen = PACKET_remaining(&r->data);
6308 return 1;
6309 }
6310 }
6311 return 0;
6312 }
6313
SSL_free_buffers(SSL * ssl)6314 int SSL_free_buffers(SSL *ssl)
6315 {
6316 RECORD_LAYER *rl;
6317 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
6318
6319 if (sc == NULL)
6320 return 0;
6321
6322 rl = &sc->rlayer;
6323
6324 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl))
6325 return 0;
6326
6327 RECORD_LAYER_release(rl);
6328 return 1;
6329 }
6330
SSL_alloc_buffers(SSL * ssl)6331 int SSL_alloc_buffers(SSL *ssl)
6332 {
6333 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
6334
6335 if (sc == NULL)
6336 return 0;
6337
6338 return ssl3_setup_buffers(sc);
6339 }
6340
SSL_CTX_set_keylog_callback(SSL_CTX * ctx,SSL_CTX_keylog_cb_func cb)6341 void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
6342 {
6343 ctx->keylog_callback = cb;
6344 }
6345
SSL_CTX_get_keylog_callback(const SSL_CTX * ctx)6346 SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
6347 {
6348 return ctx->keylog_callback;
6349 }
6350
nss_keylog_int(const char * prefix,SSL_CONNECTION * sc,const uint8_t * parameter_1,size_t parameter_1_len,const uint8_t * parameter_2,size_t parameter_2_len)6351 static int nss_keylog_int(const char *prefix,
6352 SSL_CONNECTION *sc,
6353 const uint8_t *parameter_1,
6354 size_t parameter_1_len,
6355 const uint8_t *parameter_2,
6356 size_t parameter_2_len)
6357 {
6358 char *out = NULL;
6359 char *cursor = NULL;
6360 size_t out_len = 0;
6361 size_t i;
6362 size_t prefix_len;
6363 SSL_CTX *sctx = SSL_CONNECTION_GET_CTX(sc);
6364
6365 if (sctx->keylog_callback == NULL)
6366 return 1;
6367
6368 /*
6369 * Our output buffer will contain the following strings, rendered with
6370 * space characters in between, terminated by a NULL character: first the
6371 * prefix, then the first parameter, then the second parameter. The
6372 * meaning of each parameter depends on the specific key material being
6373 * logged. Note that the first and second parameters are encoded in
6374 * hexadecimal, so we need a buffer that is twice their lengths.
6375 */
6376 prefix_len = strlen(prefix);
6377 out_len = prefix_len + (2 * parameter_1_len) + (2 * parameter_2_len) + 3;
6378 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
6379 SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
6380 return 0;
6381 }
6382
6383 strcpy(cursor, prefix);
6384 cursor += prefix_len;
6385 *cursor++ = ' ';
6386
6387 for (i = 0; i < parameter_1_len; i++) {
6388 sprintf(cursor, "%02x", parameter_1[i]);
6389 cursor += 2;
6390 }
6391 *cursor++ = ' ';
6392
6393 for (i = 0; i < parameter_2_len; i++) {
6394 sprintf(cursor, "%02x", parameter_2[i]);
6395 cursor += 2;
6396 }
6397 *cursor = '\0';
6398
6399 sctx->keylog_callback(SSL_CONNECTION_GET_SSL(sc), (const char *)out);
6400 OPENSSL_clear_free(out, out_len);
6401 return 1;
6402
6403 }
6404
ssl_log_rsa_client_key_exchange(SSL_CONNECTION * sc,const uint8_t * encrypted_premaster,size_t encrypted_premaster_len,const uint8_t * premaster,size_t premaster_len)6405 int ssl_log_rsa_client_key_exchange(SSL_CONNECTION *sc,
6406 const uint8_t *encrypted_premaster,
6407 size_t encrypted_premaster_len,
6408 const uint8_t *premaster,
6409 size_t premaster_len)
6410 {
6411 if (encrypted_premaster_len < 8) {
6412 SSLfatal(sc, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
6413 return 0;
6414 }
6415
6416 /* We only want the first 8 bytes of the encrypted premaster as a tag. */
6417 return nss_keylog_int("RSA",
6418 sc,
6419 encrypted_premaster,
6420 8,
6421 premaster,
6422 premaster_len);
6423 }
6424
ssl_log_secret(SSL_CONNECTION * sc,const char * label,const uint8_t * secret,size_t secret_len)6425 int ssl_log_secret(SSL_CONNECTION *sc,
6426 const char *label,
6427 const uint8_t *secret,
6428 size_t secret_len)
6429 {
6430 return nss_keylog_int(label,
6431 sc,
6432 sc->s3.client_random,
6433 SSL3_RANDOM_SIZE,
6434 secret,
6435 secret_len);
6436 }
6437
6438 #define SSLV2_CIPHER_LEN 3
6439
ssl_cache_cipherlist(SSL_CONNECTION * s,PACKET * cipher_suites,int sslv2format)6440 int ssl_cache_cipherlist(SSL_CONNECTION *s, PACKET *cipher_suites, int sslv2format)
6441 {
6442 int n;
6443
6444 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
6445
6446 if (PACKET_remaining(cipher_suites) == 0) {
6447 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CIPHERS_SPECIFIED);
6448 return 0;
6449 }
6450
6451 if (PACKET_remaining(cipher_suites) % n != 0) {
6452 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
6453 return 0;
6454 }
6455
6456 OPENSSL_free(s->s3.tmp.ciphers_raw);
6457 s->s3.tmp.ciphers_raw = NULL;
6458 s->s3.tmp.ciphers_rawlen = 0;
6459
6460 if (sslv2format) {
6461 size_t numciphers = PACKET_remaining(cipher_suites) / n;
6462 PACKET sslv2ciphers = *cipher_suites;
6463 unsigned int leadbyte;
6464 unsigned char *raw;
6465
6466 /*
6467 * We store the raw ciphers list in SSLv3+ format so we need to do some
6468 * preprocessing to convert the list first. If there are any SSLv2 only
6469 * ciphersuites with a non-zero leading byte then we are going to
6470 * slightly over allocate because we won't store those. But that isn't a
6471 * problem.
6472 */
6473 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
6474 s->s3.tmp.ciphers_raw = raw;
6475 if (raw == NULL) {
6476 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
6477 return 0;
6478 }
6479 for (s->s3.tmp.ciphers_rawlen = 0;
6480 PACKET_remaining(&sslv2ciphers) > 0;
6481 raw += TLS_CIPHER_LEN) {
6482 if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
6483 || (leadbyte == 0
6484 && !PACKET_copy_bytes(&sslv2ciphers, raw,
6485 TLS_CIPHER_LEN))
6486 || (leadbyte != 0
6487 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
6488 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_PACKET);
6489 OPENSSL_free(s->s3.tmp.ciphers_raw);
6490 s->s3.tmp.ciphers_raw = NULL;
6491 s->s3.tmp.ciphers_rawlen = 0;
6492 return 0;
6493 }
6494 if (leadbyte == 0)
6495 s->s3.tmp.ciphers_rawlen += TLS_CIPHER_LEN;
6496 }
6497 } else if (!PACKET_memdup(cipher_suites, &s->s3.tmp.ciphers_raw,
6498 &s->s3.tmp.ciphers_rawlen)) {
6499 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
6500 return 0;
6501 }
6502 return 1;
6503 }
6504
SSL_bytes_to_cipher_list(SSL * s,const unsigned char * bytes,size_t len,int isv2format,STACK_OF (SSL_CIPHER)** sk,STACK_OF (SSL_CIPHER)** scsvs)6505 int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
6506 int isv2format, STACK_OF(SSL_CIPHER) **sk,
6507 STACK_OF(SSL_CIPHER) **scsvs)
6508 {
6509 PACKET pkt;
6510 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6511
6512 if (sc == NULL)
6513 return 0;
6514
6515 if (!PACKET_buf_init(&pkt, bytes, len))
6516 return 0;
6517 return ossl_bytes_to_cipher_list(sc, &pkt, sk, scsvs, isv2format, 0);
6518 }
6519
ossl_bytes_to_cipher_list(SSL_CONNECTION * s,PACKET * cipher_suites,STACK_OF (SSL_CIPHER)** skp,STACK_OF (SSL_CIPHER)** scsvs_out,int sslv2format,int fatal)6520 int ossl_bytes_to_cipher_list(SSL_CONNECTION *s, PACKET *cipher_suites,
6521 STACK_OF(SSL_CIPHER) **skp,
6522 STACK_OF(SSL_CIPHER) **scsvs_out,
6523 int sslv2format, int fatal)
6524 {
6525 const SSL_CIPHER *c;
6526 STACK_OF(SSL_CIPHER) *sk = NULL;
6527 STACK_OF(SSL_CIPHER) *scsvs = NULL;
6528 int n;
6529 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
6530 unsigned char cipher[SSLV2_CIPHER_LEN];
6531
6532 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
6533
6534 if (PACKET_remaining(cipher_suites) == 0) {
6535 if (fatal)
6536 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CIPHERS_SPECIFIED);
6537 else
6538 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHERS_SPECIFIED);
6539 return 0;
6540 }
6541
6542 if (PACKET_remaining(cipher_suites) % n != 0) {
6543 if (fatal)
6544 SSLfatal(s, SSL_AD_DECODE_ERROR,
6545 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
6546 else
6547 ERR_raise(ERR_LIB_SSL, SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
6548 return 0;
6549 }
6550
6551 sk = sk_SSL_CIPHER_new_null();
6552 scsvs = sk_SSL_CIPHER_new_null();
6553 if (sk == NULL || scsvs == NULL) {
6554 if (fatal)
6555 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
6556 else
6557 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
6558 goto err;
6559 }
6560
6561 while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
6562 /*
6563 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
6564 * first byte set to zero, while true SSLv2 ciphers have a non-zero
6565 * first byte. We don't support any true SSLv2 ciphers, so skip them.
6566 */
6567 if (sslv2format && cipher[0] != '\0')
6568 continue;
6569
6570 /* For SSLv2-compat, ignore leading 0-byte. */
6571 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
6572 if (c != NULL) {
6573 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
6574 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
6575 if (fatal)
6576 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
6577 else
6578 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
6579 goto err;
6580 }
6581 }
6582 }
6583 if (PACKET_remaining(cipher_suites) > 0) {
6584 if (fatal)
6585 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH);
6586 else
6587 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
6588 goto err;
6589 }
6590
6591 if (skp != NULL)
6592 *skp = sk;
6593 else
6594 sk_SSL_CIPHER_free(sk);
6595 if (scsvs_out != NULL)
6596 *scsvs_out = scsvs;
6597 else
6598 sk_SSL_CIPHER_free(scsvs);
6599 return 1;
6600 err:
6601 sk_SSL_CIPHER_free(sk);
6602 sk_SSL_CIPHER_free(scsvs);
6603 return 0;
6604 }
6605
SSL_CTX_set_max_early_data(SSL_CTX * ctx,uint32_t max_early_data)6606 int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
6607 {
6608 ctx->max_early_data = max_early_data;
6609
6610 return 1;
6611 }
6612
SSL_CTX_get_max_early_data(const SSL_CTX * ctx)6613 uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
6614 {
6615 return ctx->max_early_data;
6616 }
6617
SSL_set_max_early_data(SSL * s,uint32_t max_early_data)6618 int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
6619 {
6620 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6621
6622 if (sc == NULL)
6623 return 0;
6624
6625 sc->max_early_data = max_early_data;
6626
6627 return 1;
6628 }
6629
SSL_get_max_early_data(const SSL * s)6630 uint32_t SSL_get_max_early_data(const SSL *s)
6631 {
6632 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
6633
6634 if (sc == NULL)
6635 return 0;
6636
6637 return sc->max_early_data;
6638 }
6639
SSL_CTX_set_recv_max_early_data(SSL_CTX * ctx,uint32_t recv_max_early_data)6640 int SSL_CTX_set_recv_max_early_data(SSL_CTX *ctx, uint32_t recv_max_early_data)
6641 {
6642 ctx->recv_max_early_data = recv_max_early_data;
6643
6644 return 1;
6645 }
6646
SSL_CTX_get_recv_max_early_data(const SSL_CTX * ctx)6647 uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX *ctx)
6648 {
6649 return ctx->recv_max_early_data;
6650 }
6651
SSL_set_recv_max_early_data(SSL * s,uint32_t recv_max_early_data)6652 int SSL_set_recv_max_early_data(SSL *s, uint32_t recv_max_early_data)
6653 {
6654 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6655
6656 if (sc == NULL)
6657 return 0;
6658
6659 sc->recv_max_early_data = recv_max_early_data;
6660
6661 return 1;
6662 }
6663
SSL_get_recv_max_early_data(const SSL * s)6664 uint32_t SSL_get_recv_max_early_data(const SSL *s)
6665 {
6666 const SSL_CONNECTION *sc = SSL_CONNECTION_FROM_CONST_SSL(s);
6667
6668 if (sc == NULL)
6669 return 0;
6670
6671 return sc->recv_max_early_data;
6672 }
6673
ssl_get_max_send_fragment(const SSL_CONNECTION * sc)6674 __owur unsigned int ssl_get_max_send_fragment(const SSL_CONNECTION *sc)
6675 {
6676 /* Return any active Max Fragment Len extension */
6677 if (sc->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(sc->session))
6678 return GET_MAX_FRAGMENT_LENGTH(sc->session);
6679
6680 /* return current SSL connection setting */
6681 return sc->max_send_fragment;
6682 }
6683
ssl_get_split_send_fragment(const SSL_CONNECTION * sc)6684 __owur unsigned int ssl_get_split_send_fragment(const SSL_CONNECTION *sc)
6685 {
6686 /* Return a value regarding an active Max Fragment Len extension */
6687 if (sc->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(sc->session)
6688 && sc->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(sc->session))
6689 return GET_MAX_FRAGMENT_LENGTH(sc->session);
6690
6691 /* else limit |split_send_fragment| to current |max_send_fragment| */
6692 if (sc->split_send_fragment > sc->max_send_fragment)
6693 return sc->max_send_fragment;
6694
6695 /* return current SSL connection setting */
6696 return sc->split_send_fragment;
6697 }
6698
SSL_stateless(SSL * s)6699 int SSL_stateless(SSL *s)
6700 {
6701 int ret;
6702 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6703
6704 /* TODO(QUIC): This will need further work. */
6705 if (sc == NULL)
6706 return 0;
6707
6708 /* Ensure there is no state left over from a previous invocation */
6709 if (!SSL_clear(s))
6710 return 0;
6711
6712 ERR_clear_error();
6713
6714 sc->s3.flags |= TLS1_FLAGS_STATELESS;
6715 ret = SSL_accept(s);
6716 sc->s3.flags &= ~TLS1_FLAGS_STATELESS;
6717
6718 if (ret > 0 && sc->ext.cookieok)
6719 return 1;
6720
6721 if (sc->hello_retry_request == SSL_HRR_PENDING && !ossl_statem_in_error(sc))
6722 return 0;
6723
6724 return -1;
6725 }
6726
SSL_CTX_set_post_handshake_auth(SSL_CTX * ctx,int val)6727 void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val)
6728 {
6729 ctx->pha_enabled = val;
6730 }
6731
SSL_set_post_handshake_auth(SSL * ssl,int val)6732 void SSL_set_post_handshake_auth(SSL *ssl, int val)
6733 {
6734 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
6735
6736 if (sc == NULL)
6737 return;
6738
6739 sc->pha_enabled = val;
6740 }
6741
SSL_verify_client_post_handshake(SSL * ssl)6742 int SSL_verify_client_post_handshake(SSL *ssl)
6743 {
6744 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
6745
6746 if (sc == NULL)
6747 return 0;
6748
6749 if (!SSL_CONNECTION_IS_TLS13(sc)) {
6750 ERR_raise(ERR_LIB_SSL, SSL_R_WRONG_SSL_VERSION);
6751 return 0;
6752 }
6753 if (!sc->server) {
6754 ERR_raise(ERR_LIB_SSL, SSL_R_NOT_SERVER);
6755 return 0;
6756 }
6757
6758 if (!SSL_is_init_finished(ssl)) {
6759 ERR_raise(ERR_LIB_SSL, SSL_R_STILL_IN_INIT);
6760 return 0;
6761 }
6762
6763 switch (sc->post_handshake_auth) {
6764 case SSL_PHA_NONE:
6765 ERR_raise(ERR_LIB_SSL, SSL_R_EXTENSION_NOT_RECEIVED);
6766 return 0;
6767 default:
6768 case SSL_PHA_EXT_SENT:
6769 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
6770 return 0;
6771 case SSL_PHA_EXT_RECEIVED:
6772 break;
6773 case SSL_PHA_REQUEST_PENDING:
6774 ERR_raise(ERR_LIB_SSL, SSL_R_REQUEST_PENDING);
6775 return 0;
6776 case SSL_PHA_REQUESTED:
6777 ERR_raise(ERR_LIB_SSL, SSL_R_REQUEST_SENT);
6778 return 0;
6779 }
6780
6781 sc->post_handshake_auth = SSL_PHA_REQUEST_PENDING;
6782
6783 /* checks verify_mode and algorithm_auth */
6784 if (!send_certificate_request(sc)) {
6785 sc->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */
6786 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_CONFIG);
6787 return 0;
6788 }
6789
6790 ossl_statem_set_in_init(sc, 1);
6791 return 1;
6792 }
6793
SSL_CTX_set_session_ticket_cb(SSL_CTX * ctx,SSL_CTX_generate_session_ticket_fn gen_cb,SSL_CTX_decrypt_session_ticket_fn dec_cb,void * arg)6794 int SSL_CTX_set_session_ticket_cb(SSL_CTX *ctx,
6795 SSL_CTX_generate_session_ticket_fn gen_cb,
6796 SSL_CTX_decrypt_session_ticket_fn dec_cb,
6797 void *arg)
6798 {
6799 ctx->generate_ticket_cb = gen_cb;
6800 ctx->decrypt_ticket_cb = dec_cb;
6801 ctx->ticket_cb_data = arg;
6802 return 1;
6803 }
6804
SSL_CTX_set_allow_early_data_cb(SSL_CTX * ctx,SSL_allow_early_data_cb_fn cb,void * arg)6805 void SSL_CTX_set_allow_early_data_cb(SSL_CTX *ctx,
6806 SSL_allow_early_data_cb_fn cb,
6807 void *arg)
6808 {
6809 ctx->allow_early_data_cb = cb;
6810 ctx->allow_early_data_cb_data = arg;
6811 }
6812
SSL_set_allow_early_data_cb(SSL * s,SSL_allow_early_data_cb_fn cb,void * arg)6813 void SSL_set_allow_early_data_cb(SSL *s,
6814 SSL_allow_early_data_cb_fn cb,
6815 void *arg)
6816 {
6817 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6818
6819 if (sc == NULL)
6820 return;
6821
6822 sc->allow_early_data_cb = cb;
6823 sc->allow_early_data_cb_data = arg;
6824 }
6825
ssl_evp_cipher_fetch(OSSL_LIB_CTX * libctx,int nid,const char * properties)6826 const EVP_CIPHER *ssl_evp_cipher_fetch(OSSL_LIB_CTX *libctx,
6827 int nid,
6828 const char *properties)
6829 {
6830 const EVP_CIPHER *ciph;
6831
6832 ciph = tls_get_cipher_from_engine(nid);
6833 if (ciph != NULL)
6834 return ciph;
6835
6836 /*
6837 * If there is no engine cipher then we do an explicit fetch. This may fail
6838 * and that could be ok
6839 */
6840 ERR_set_mark();
6841 ciph = EVP_CIPHER_fetch(libctx, OBJ_nid2sn(nid), properties);
6842 ERR_pop_to_mark();
6843 return ciph;
6844 }
6845
6846
ssl_evp_cipher_up_ref(const EVP_CIPHER * cipher)6847 int ssl_evp_cipher_up_ref(const EVP_CIPHER *cipher)
6848 {
6849 /* Don't up-ref an implicit EVP_CIPHER */
6850 if (EVP_CIPHER_get0_provider(cipher) == NULL)
6851 return 1;
6852
6853 /*
6854 * The cipher was explicitly fetched and therefore it is safe to cast
6855 * away the const
6856 */
6857 return EVP_CIPHER_up_ref((EVP_CIPHER *)cipher);
6858 }
6859
ssl_evp_cipher_free(const EVP_CIPHER * cipher)6860 void ssl_evp_cipher_free(const EVP_CIPHER *cipher)
6861 {
6862 if (cipher == NULL)
6863 return;
6864
6865 if (EVP_CIPHER_get0_provider(cipher) != NULL) {
6866 /*
6867 * The cipher was explicitly fetched and therefore it is safe to cast
6868 * away the const
6869 */
6870 EVP_CIPHER_free((EVP_CIPHER *)cipher);
6871 }
6872 }
6873
ssl_evp_md_fetch(OSSL_LIB_CTX * libctx,int nid,const char * properties)6874 const EVP_MD *ssl_evp_md_fetch(OSSL_LIB_CTX *libctx,
6875 int nid,
6876 const char *properties)
6877 {
6878 const EVP_MD *md;
6879
6880 md = tls_get_digest_from_engine(nid);
6881 if (md != NULL)
6882 return md;
6883
6884 /* Otherwise we do an explicit fetch */
6885 ERR_set_mark();
6886 md = EVP_MD_fetch(libctx, OBJ_nid2sn(nid), properties);
6887 ERR_pop_to_mark();
6888 return md;
6889 }
6890
ssl_evp_md_up_ref(const EVP_MD * md)6891 int ssl_evp_md_up_ref(const EVP_MD *md)
6892 {
6893 /* Don't up-ref an implicit EVP_MD */
6894 if (EVP_MD_get0_provider(md) == NULL)
6895 return 1;
6896
6897 /*
6898 * The digest was explicitly fetched and therefore it is safe to cast
6899 * away the const
6900 */
6901 return EVP_MD_up_ref((EVP_MD *)md);
6902 }
6903
ssl_evp_md_free(const EVP_MD * md)6904 void ssl_evp_md_free(const EVP_MD *md)
6905 {
6906 if (md == NULL)
6907 return;
6908
6909 if (EVP_MD_get0_provider(md) != NULL) {
6910 /*
6911 * The digest was explicitly fetched and therefore it is safe to cast
6912 * away the const
6913 */
6914 EVP_MD_free((EVP_MD *)md);
6915 }
6916 }
6917
SSL_set0_tmp_dh_pkey(SSL * s,EVP_PKEY * dhpkey)6918 int SSL_set0_tmp_dh_pkey(SSL *s, EVP_PKEY *dhpkey)
6919 {
6920 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
6921
6922 if (sc == NULL)
6923 return 0;
6924
6925 if (!ssl_security(sc, SSL_SECOP_TMP_DH,
6926 EVP_PKEY_get_security_bits(dhpkey), 0, dhpkey)) {
6927 ERR_raise(ERR_LIB_SSL, SSL_R_DH_KEY_TOO_SMALL);
6928 return 0;
6929 }
6930 EVP_PKEY_free(sc->cert->dh_tmp);
6931 sc->cert->dh_tmp = dhpkey;
6932 return 1;
6933 }
6934
SSL_CTX_set0_tmp_dh_pkey(SSL_CTX * ctx,EVP_PKEY * dhpkey)6935 int SSL_CTX_set0_tmp_dh_pkey(SSL_CTX *ctx, EVP_PKEY *dhpkey)
6936 {
6937 if (!ssl_ctx_security(ctx, SSL_SECOP_TMP_DH,
6938 EVP_PKEY_get_security_bits(dhpkey), 0, dhpkey)) {
6939 ERR_raise(ERR_LIB_SSL, SSL_R_DH_KEY_TOO_SMALL);
6940 return 0;
6941 }
6942 EVP_PKEY_free(ctx->cert->dh_tmp);
6943 ctx->cert->dh_tmp = dhpkey;
6944 return 1;
6945 }
6946
