1 /*
2 * Copyright 1995-2024 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 "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 "internal/cryptlib.h"
25 #include "internal/refcount.h"
26 #include "internal/ktls.h"
27
ssl_undefined_function_1(SSL * ssl,SSL3_RECORD * r,size_t s,int t,SSL_MAC_BUF * mac,size_t macsize)28 static int ssl_undefined_function_1(SSL *ssl, SSL3_RECORD *r, size_t s, int t,
29 SSL_MAC_BUF *mac, size_t macsize)
30 {
31 return ssl_undefined_function(ssl);
32 }
33
ssl_undefined_function_2(SSL * ssl,SSL3_RECORD * r,unsigned char * s,int t)34 static int ssl_undefined_function_2(SSL *ssl, SSL3_RECORD *r, unsigned char *s,
35 int t)
36 {
37 return ssl_undefined_function(ssl);
38 }
39
ssl_undefined_function_3(SSL * ssl,unsigned char * r,unsigned char * s,size_t t,size_t * u)40 static int ssl_undefined_function_3(SSL *ssl, unsigned char *r,
41 unsigned char *s, size_t t, size_t *u)
42 {
43 return ssl_undefined_function(ssl);
44 }
45
ssl_undefined_function_4(SSL * ssl,int r)46 static int ssl_undefined_function_4(SSL *ssl, int r)
47 {
48 return ssl_undefined_function(ssl);
49 }
50
ssl_undefined_function_5(SSL * ssl,const char * r,size_t s,unsigned char * t)51 static size_t ssl_undefined_function_5(SSL *ssl, const char *r, size_t s,
52 unsigned char *t)
53 {
54 return ssl_undefined_function(ssl);
55 }
56
ssl_undefined_function_6(int r)57 static int ssl_undefined_function_6(int r)
58 {
59 return ssl_undefined_function(NULL);
60 }
61
ssl_undefined_function_7(SSL * ssl,unsigned char * r,size_t s,const char * t,size_t u,const unsigned char * v,size_t w,int x)62 static int ssl_undefined_function_7(SSL *ssl, unsigned char *r, size_t s,
63 const char *t, size_t u,
64 const unsigned char *v, size_t w, int x)
65 {
66 return ssl_undefined_function(ssl);
67 }
68
69 SSL3_ENC_METHOD ssl3_undef_enc_method = {
70 ssl_undefined_function_1,
71 ssl_undefined_function_2,
72 ssl_undefined_function,
73 ssl_undefined_function_3,
74 ssl_undefined_function_4,
75 ssl_undefined_function_5,
76 NULL, /* client_finished_label */
77 0, /* client_finished_label_len */
78 NULL, /* server_finished_label */
79 0, /* server_finished_label_len */
80 ssl_undefined_function_6,
81 ssl_undefined_function_7,
82 };
83
84 struct ssl_async_args {
85 SSL *s;
86 void *buf;
87 size_t num;
88 enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
89 union {
90 int (*func_read) (SSL *, void *, size_t, size_t *);
91 int (*func_write) (SSL *, const void *, size_t, size_t *);
92 int (*func_other) (SSL *);
93 } f;
94 };
95
96 static const struct {
97 uint8_t mtype;
98 uint8_t ord;
99 int nid;
100 } dane_mds[] = {
101 {
102 DANETLS_MATCHING_FULL, 0, NID_undef
103 },
104 {
105 DANETLS_MATCHING_2256, 1, NID_sha256
106 },
107 {
108 DANETLS_MATCHING_2512, 2, NID_sha512
109 },
110 };
111
dane_ctx_enable(struct dane_ctx_st * dctx)112 static int dane_ctx_enable(struct dane_ctx_st *dctx)
113 {
114 const EVP_MD **mdevp;
115 uint8_t *mdord;
116 uint8_t mdmax = DANETLS_MATCHING_LAST;
117 int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */
118 size_t i;
119
120 if (dctx->mdevp != NULL)
121 return 1;
122
123 mdevp = OPENSSL_zalloc(n * sizeof(*mdevp));
124 mdord = OPENSSL_zalloc(n * sizeof(*mdord));
125
126 if (mdord == NULL || mdevp == NULL) {
127 OPENSSL_free(mdord);
128 OPENSSL_free(mdevp);
129 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
130 return 0;
131 }
132
133 /* Install default entries */
134 for (i = 0; i < OSSL_NELEM(dane_mds); ++i) {
135 const EVP_MD *md;
136
137 if (dane_mds[i].nid == NID_undef ||
138 (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL)
139 continue;
140 mdevp[dane_mds[i].mtype] = md;
141 mdord[dane_mds[i].mtype] = dane_mds[i].ord;
142 }
143
144 dctx->mdevp = mdevp;
145 dctx->mdord = mdord;
146 dctx->mdmax = mdmax;
147
148 return 1;
149 }
150
dane_ctx_final(struct dane_ctx_st * dctx)151 static void dane_ctx_final(struct dane_ctx_st *dctx)
152 {
153 OPENSSL_free(dctx->mdevp);
154 dctx->mdevp = NULL;
155
156 OPENSSL_free(dctx->mdord);
157 dctx->mdord = NULL;
158 dctx->mdmax = 0;
159 }
160
tlsa_free(danetls_record * t)161 static void tlsa_free(danetls_record *t)
162 {
163 if (t == NULL)
164 return;
165 OPENSSL_free(t->data);
166 EVP_PKEY_free(t->spki);
167 OPENSSL_free(t);
168 }
169
dane_final(SSL_DANE * dane)170 static void dane_final(SSL_DANE *dane)
171 {
172 sk_danetls_record_pop_free(dane->trecs, tlsa_free);
173 dane->trecs = NULL;
174
175 sk_X509_pop_free(dane->certs, X509_free);
176 dane->certs = NULL;
177
178 X509_free(dane->mcert);
179 dane->mcert = NULL;
180 dane->mtlsa = NULL;
181 dane->mdpth = -1;
182 dane->pdpth = -1;
183 }
184
185 /*
186 * dane_copy - Copy dane configuration, sans verification state.
187 */
ssl_dane_dup(SSL * to,SSL * from)188 static int ssl_dane_dup(SSL *to, SSL *from)
189 {
190 int num;
191 int i;
192
193 if (!DANETLS_ENABLED(&from->dane))
194 return 1;
195
196 num = sk_danetls_record_num(from->dane.trecs);
197 dane_final(&to->dane);
198 to->dane.flags = from->dane.flags;
199 to->dane.dctx = &to->ctx->dane;
200 to->dane.trecs = sk_danetls_record_new_reserve(NULL, num);
201
202 if (to->dane.trecs == NULL) {
203 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
204 return 0;
205 }
206
207 for (i = 0; i < num; ++i) {
208 danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
209
210 if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype,
211 t->data, t->dlen) <= 0)
212 return 0;
213 }
214 return 1;
215 }
216
dane_mtype_set(struct dane_ctx_st * dctx,const EVP_MD * md,uint8_t mtype,uint8_t ord)217 static int dane_mtype_set(struct dane_ctx_st *dctx,
218 const EVP_MD *md, uint8_t mtype, uint8_t ord)
219 {
220 int i;
221
222 if (mtype == DANETLS_MATCHING_FULL && md != NULL) {
223 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL);
224 return 0;
225 }
226
227 if (mtype > dctx->mdmax) {
228 const EVP_MD **mdevp;
229 uint8_t *mdord;
230 int n = ((int)mtype) + 1;
231
232 mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp));
233 if (mdevp == NULL) {
234 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
235 return -1;
236 }
237 dctx->mdevp = mdevp;
238
239 mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
240 if (mdord == NULL) {
241 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
242 return -1;
243 }
244 dctx->mdord = mdord;
245
246 /* Zero-fill any gaps */
247 for (i = dctx->mdmax + 1; i < mtype; ++i) {
248 mdevp[i] = NULL;
249 mdord[i] = 0;
250 }
251
252 dctx->mdmax = mtype;
253 }
254
255 dctx->mdevp[mtype] = md;
256 /* Coerce ordinal of disabled matching types to 0 */
257 dctx->mdord[mtype] = (md == NULL) ? 0 : ord;
258
259 return 1;
260 }
261
tlsa_md_get(SSL_DANE * dane,uint8_t mtype)262 static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype)
263 {
264 if (mtype > dane->dctx->mdmax)
265 return NULL;
266 return dane->dctx->mdevp[mtype];
267 }
268
dane_tlsa_add(SSL_DANE * dane,uint8_t usage,uint8_t selector,uint8_t mtype,const unsigned char * data,size_t dlen)269 static int dane_tlsa_add(SSL_DANE *dane,
270 uint8_t usage,
271 uint8_t selector,
272 uint8_t mtype, const unsigned char *data, size_t dlen)
273 {
274 danetls_record *t;
275 const EVP_MD *md = NULL;
276 int ilen = (int)dlen;
277 int i;
278 int num;
279
280 if (dane->trecs == NULL) {
281 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_NOT_ENABLED);
282 return -1;
283 }
284
285 if (ilen < 0 || dlen != (size_t)ilen) {
286 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
287 return 0;
288 }
289
290 if (usage > DANETLS_USAGE_LAST) {
291 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
292 return 0;
293 }
294
295 if (selector > DANETLS_SELECTOR_LAST) {
296 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_SELECTOR);
297 return 0;
298 }
299
300 if (mtype != DANETLS_MATCHING_FULL) {
301 md = tlsa_md_get(dane, mtype);
302 if (md == NULL) {
303 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
304 return 0;
305 }
306 }
307
308 if (md != NULL && dlen != (size_t)EVP_MD_get_size(md)) {
309 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
310 return 0;
311 }
312 if (!data) {
313 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_NULL_DATA);
314 return 0;
315 }
316
317 if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) {
318 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
319 return -1;
320 }
321
322 t->usage = usage;
323 t->selector = selector;
324 t->mtype = mtype;
325 t->data = OPENSSL_malloc(dlen);
326 if (t->data == NULL) {
327 tlsa_free(t);
328 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
329 return -1;
330 }
331 memcpy(t->data, data, dlen);
332 t->dlen = dlen;
333
334 /* Validate and cache full certificate or public key */
335 if (mtype == DANETLS_MATCHING_FULL) {
336 const unsigned char *p = data;
337 X509 *cert = NULL;
338 EVP_PKEY *pkey = NULL;
339
340 switch (selector) {
341 case DANETLS_SELECTOR_CERT:
342 if (!d2i_X509(&cert, &p, ilen) || p < data ||
343 dlen != (size_t)(p - data)) {
344 X509_free(cert);
345 tlsa_free(t);
346 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
347 return 0;
348 }
349 if (X509_get0_pubkey(cert) == NULL) {
350 X509_free(cert);
351 tlsa_free(t);
352 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
353 return 0;
354 }
355
356 if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) {
357 /*
358 * The Full(0) certificate decodes to a seemingly valid X.509
359 * object with a plausible key, so the TLSA record is well
360 * formed. However, we don't actually need the certifiate for
361 * usages PKIX-EE(1) or DANE-EE(3), because at least the EE
362 * certificate is always presented by the peer. We discard the
363 * certificate, and just use the TLSA data as an opaque blob
364 * for matching the raw presented DER octets.
365 *
366 * DO NOT FREE `t` here, it will be added to the TLSA record
367 * list below!
368 */
369 X509_free(cert);
370 break;
371 }
372
373 /*
374 * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA
375 * records that contain full certificates of trust-anchors that are
376 * not present in the wire chain. For usage PKIX-TA(0), we augment
377 * the chain with untrusted Full(0) certificates from DNS, in case
378 * they are missing from the chain.
379 */
380 if ((dane->certs == NULL &&
381 (dane->certs = sk_X509_new_null()) == NULL) ||
382 !sk_X509_push(dane->certs, cert)) {
383 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
384 X509_free(cert);
385 tlsa_free(t);
386 return -1;
387 }
388 break;
389
390 case DANETLS_SELECTOR_SPKI:
391 if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
392 dlen != (size_t)(p - data)) {
393 EVP_PKEY_free(pkey);
394 tlsa_free(t);
395 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
396 return 0;
397 }
398
399 /*
400 * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA
401 * records that contain full bare keys of trust-anchors that are
402 * not present in the wire chain.
403 */
404 if (usage == DANETLS_USAGE_DANE_TA)
405 t->spki = pkey;
406 else
407 EVP_PKEY_free(pkey);
408 break;
409 }
410 }
411
412 /*-
413 * Find the right insertion point for the new record.
414 *
415 * See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that
416 * they can be processed first, as they require no chain building, and no
417 * expiration or hostname checks. Because DANE-EE(3) is numerically
418 * largest, this is accomplished via descending sort by "usage".
419 *
420 * We also sort in descending order by matching ordinal to simplify
421 * the implementation of digest agility in the verification code.
422 *
423 * The choice of order for the selector is not significant, so we
424 * use the same descending order for consistency.
425 */
426 num = sk_danetls_record_num(dane->trecs);
427 for (i = 0; i < num; ++i) {
428 danetls_record *rec = sk_danetls_record_value(dane->trecs, i);
429
430 if (rec->usage > usage)
431 continue;
432 if (rec->usage < usage)
433 break;
434 if (rec->selector > selector)
435 continue;
436 if (rec->selector < selector)
437 break;
438 if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype])
439 continue;
440 break;
441 }
442
443 if (!sk_danetls_record_insert(dane->trecs, t, i)) {
444 tlsa_free(t);
445 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
446 return -1;
447 }
448 dane->umask |= DANETLS_USAGE_BIT(usage);
449
450 return 1;
451 }
452
453 /*
454 * Return 0 if there is only one version configured and it was disabled
455 * at configure time. Return 1 otherwise.
456 */
ssl_check_allowed_versions(int min_version,int max_version)457 static int ssl_check_allowed_versions(int min_version, int max_version)
458 {
459 int minisdtls = 0, maxisdtls = 0;
460
461 /* Figure out if we're doing DTLS versions or TLS versions */
462 if (min_version == DTLS1_BAD_VER
463 || min_version >> 8 == DTLS1_VERSION_MAJOR)
464 minisdtls = 1;
465 if (max_version == DTLS1_BAD_VER
466 || max_version >> 8 == DTLS1_VERSION_MAJOR)
467 maxisdtls = 1;
468 /* A wildcard version of 0 could be DTLS or TLS. */
469 if ((minisdtls && !maxisdtls && max_version != 0)
470 || (maxisdtls && !minisdtls && min_version != 0)) {
471 /* Mixing DTLS and TLS versions will lead to sadness; deny it. */
472 return 0;
473 }
474
475 if (minisdtls || maxisdtls) {
476 /* Do DTLS version checks. */
477 if (min_version == 0)
478 /* Ignore DTLS1_BAD_VER */
479 min_version = DTLS1_VERSION;
480 if (max_version == 0)
481 max_version = DTLS1_2_VERSION;
482 #ifdef OPENSSL_NO_DTLS1_2
483 if (max_version == DTLS1_2_VERSION)
484 max_version = DTLS1_VERSION;
485 #endif
486 #ifdef OPENSSL_NO_DTLS1
487 if (min_version == DTLS1_VERSION)
488 min_version = DTLS1_2_VERSION;
489 #endif
490 /* Done massaging versions; do the check. */
491 if (0
492 #ifdef OPENSSL_NO_DTLS1
493 || (DTLS_VERSION_GE(min_version, DTLS1_VERSION)
494 && DTLS_VERSION_GE(DTLS1_VERSION, max_version))
495 #endif
496 #ifdef OPENSSL_NO_DTLS1_2
497 || (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION)
498 && DTLS_VERSION_GE(DTLS1_2_VERSION, max_version))
499 #endif
500 )
501 return 0;
502 } else {
503 /* Regular TLS version checks. */
504 if (min_version == 0)
505 min_version = SSL3_VERSION;
506 if (max_version == 0)
507 max_version = TLS1_3_VERSION;
508 #ifdef OPENSSL_NO_TLS1_3
509 if (max_version == TLS1_3_VERSION)
510 max_version = TLS1_2_VERSION;
511 #endif
512 #ifdef OPENSSL_NO_TLS1_2
513 if (max_version == TLS1_2_VERSION)
514 max_version = TLS1_1_VERSION;
515 #endif
516 #ifdef OPENSSL_NO_TLS1_1
517 if (max_version == TLS1_1_VERSION)
518 max_version = TLS1_VERSION;
519 #endif
520 #ifdef OPENSSL_NO_TLS1
521 if (max_version == TLS1_VERSION)
522 max_version = SSL3_VERSION;
523 #endif
524 #ifdef OPENSSL_NO_SSL3
525 if (min_version == SSL3_VERSION)
526 min_version = TLS1_VERSION;
527 #endif
528 #ifdef OPENSSL_NO_TLS1
529 if (min_version == TLS1_VERSION)
530 min_version = TLS1_1_VERSION;
531 #endif
532 #ifdef OPENSSL_NO_TLS1_1
533 if (min_version == TLS1_1_VERSION)
534 min_version = TLS1_2_VERSION;
535 #endif
536 #ifdef OPENSSL_NO_TLS1_2
537 if (min_version == TLS1_2_VERSION)
538 min_version = TLS1_3_VERSION;
539 #endif
540 /* Done massaging versions; do the check. */
541 if (0
542 #ifdef OPENSSL_NO_SSL3
543 || (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version)
544 #endif
545 #ifdef OPENSSL_NO_TLS1
546 || (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version)
547 #endif
548 #ifdef OPENSSL_NO_TLS1_1
549 || (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version)
550 #endif
551 #ifdef OPENSSL_NO_TLS1_2
552 || (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version)
553 #endif
554 #ifdef OPENSSL_NO_TLS1_3
555 || (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version)
556 #endif
557 )
558 return 0;
559 }
560 return 1;
561 }
562
563 #if defined(__TANDEM) && defined(OPENSSL_VPROC)
564 /*
565 * Define a VPROC function for HP NonStop build ssl library.
566 * This is used by platform version identification tools.
567 * Do not inline this procedure or make it static.
568 */
569 # define OPENSSL_VPROC_STRING_(x) x##_SSL
570 # define OPENSSL_VPROC_STRING(x) OPENSSL_VPROC_STRING_(x)
571 # define OPENSSL_VPROC_FUNC OPENSSL_VPROC_STRING(OPENSSL_VPROC)
OPENSSL_VPROC_FUNC(void)572 void OPENSSL_VPROC_FUNC(void) {}
573 #endif
574
575
clear_ciphers(SSL * s)576 static void clear_ciphers(SSL *s)
577 {
578 /* clear the current cipher */
579 ssl_clear_cipher_ctx(s);
580 ssl_clear_hash_ctx(&s->read_hash);
581 ssl_clear_hash_ctx(&s->write_hash);
582 }
583
SSL_clear(SSL * s)584 int SSL_clear(SSL *s)
585 {
586 if (s->method == NULL) {
587 ERR_raise(ERR_LIB_SSL, SSL_R_NO_METHOD_SPECIFIED);
588 return 0;
589 }
590
591 if (ssl_clear_bad_session(s)) {
592 SSL_SESSION_free(s->session);
593 s->session = NULL;
594 }
595 SSL_SESSION_free(s->psksession);
596 s->psksession = NULL;
597 OPENSSL_free(s->psksession_id);
598 s->psksession_id = NULL;
599 s->psksession_id_len = 0;
600 s->hello_retry_request = SSL_HRR_NONE;
601 s->sent_tickets = 0;
602
603 s->error = 0;
604 s->hit = 0;
605 s->shutdown = 0;
606
607 if (s->renegotiate) {
608 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
609 return 0;
610 }
611
612 ossl_statem_clear(s);
613
614 s->version = s->method->version;
615 s->client_version = s->version;
616 s->rwstate = SSL_NOTHING;
617
618 BUF_MEM_free(s->init_buf);
619 s->init_buf = NULL;
620 clear_ciphers(s);
621 s->first_packet = 0;
622
623 s->key_update = SSL_KEY_UPDATE_NONE;
624
625 EVP_MD_CTX_free(s->pha_dgst);
626 s->pha_dgst = NULL;
627
628 /* Reset DANE verification result state */
629 s->dane.mdpth = -1;
630 s->dane.pdpth = -1;
631 X509_free(s->dane.mcert);
632 s->dane.mcert = NULL;
633 s->dane.mtlsa = NULL;
634
635 /* Clear the verification result peername */
636 X509_VERIFY_PARAM_move_peername(s->param, NULL);
637
638 /* Clear any shared connection state */
639 OPENSSL_free(s->shared_sigalgs);
640 s->shared_sigalgs = NULL;
641 s->shared_sigalgslen = 0;
642
643 /*
644 * Check to see if we were changed into a different method, if so, revert
645 * back.
646 */
647 if (s->method != s->ctx->method) {
648 s->method->ssl_free(s);
649 s->method = s->ctx->method;
650 if (!s->method->ssl_new(s))
651 return 0;
652 } else {
653 if (!s->method->ssl_clear(s))
654 return 0;
655 }
656
657 RECORD_LAYER_clear(&s->rlayer);
658
659 return 1;
660 }
661
662 #ifndef OPENSSL_NO_DEPRECATED_3_0
663 /** Used to change an SSL_CTXs default SSL method type */
SSL_CTX_set_ssl_version(SSL_CTX * ctx,const SSL_METHOD * meth)664 int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
665 {
666 STACK_OF(SSL_CIPHER) *sk;
667
668 ctx->method = meth;
669
670 if (!SSL_CTX_set_ciphersuites(ctx, OSSL_default_ciphersuites())) {
671 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
672 return 0;
673 }
674 sk = ssl_create_cipher_list(ctx,
675 ctx->tls13_ciphersuites,
676 &(ctx->cipher_list),
677 &(ctx->cipher_list_by_id),
678 OSSL_default_cipher_list(), ctx->cert);
679 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
680 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
681 return 0;
682 }
683 return 1;
684 }
685 #endif
686
SSL_new(SSL_CTX * ctx)687 SSL *SSL_new(SSL_CTX *ctx)
688 {
689 SSL *s;
690
691 if (ctx == NULL) {
692 ERR_raise(ERR_LIB_SSL, SSL_R_NULL_SSL_CTX);
693 return NULL;
694 }
695 if (ctx->method == NULL) {
696 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
697 return NULL;
698 }
699
700 s = OPENSSL_zalloc(sizeof(*s));
701 if (s == NULL)
702 goto err;
703
704 s->references = 1;
705 s->lock = CRYPTO_THREAD_lock_new();
706 if (s->lock == NULL) {
707 OPENSSL_free(s);
708 s = NULL;
709 goto err;
710 }
711
712 RECORD_LAYER_init(&s->rlayer, s);
713
714 s->options = ctx->options;
715 s->dane.flags = ctx->dane.flags;
716 s->min_proto_version = ctx->min_proto_version;
717 s->max_proto_version = ctx->max_proto_version;
718 s->mode = ctx->mode;
719 s->max_cert_list = ctx->max_cert_list;
720 s->max_early_data = ctx->max_early_data;
721 s->recv_max_early_data = ctx->recv_max_early_data;
722 s->num_tickets = ctx->num_tickets;
723 s->pha_enabled = ctx->pha_enabled;
724
725 /* Shallow copy of the ciphersuites stack */
726 s->tls13_ciphersuites = sk_SSL_CIPHER_dup(ctx->tls13_ciphersuites);
727 if (s->tls13_ciphersuites == NULL)
728 goto err;
729
730 /*
731 * Earlier library versions used to copy the pointer to the CERT, not
732 * its contents; only when setting new parameters for the per-SSL
733 * copy, ssl_cert_new would be called (and the direct reference to
734 * the per-SSL_CTX settings would be lost, but those still were
735 * indirectly accessed for various purposes, and for that reason they
736 * used to be known as s->ctx->default_cert). Now we don't look at the
737 * SSL_CTX's CERT after having duplicated it once.
738 */
739 s->cert = ssl_cert_dup(ctx->cert);
740 if (s->cert == NULL)
741 goto err;
742
743 RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
744 s->msg_callback = ctx->msg_callback;
745 s->msg_callback_arg = ctx->msg_callback_arg;
746 s->verify_mode = ctx->verify_mode;
747 s->not_resumable_session_cb = ctx->not_resumable_session_cb;
748 s->record_padding_cb = ctx->record_padding_cb;
749 s->record_padding_arg = ctx->record_padding_arg;
750 s->block_padding = ctx->block_padding;
751 s->sid_ctx_length = ctx->sid_ctx_length;
752 if (!ossl_assert(s->sid_ctx_length <= sizeof(s->sid_ctx)))
753 goto err;
754 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
755 s->verify_callback = ctx->default_verify_callback;
756 s->generate_session_id = ctx->generate_session_id;
757
758 s->param = X509_VERIFY_PARAM_new();
759 if (s->param == NULL)
760 goto err;
761 X509_VERIFY_PARAM_inherit(s->param, ctx->param);
762 s->quiet_shutdown = ctx->quiet_shutdown;
763
764 s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode;
765 s->max_send_fragment = ctx->max_send_fragment;
766 s->split_send_fragment = ctx->split_send_fragment;
767 s->max_pipelines = ctx->max_pipelines;
768 if (s->max_pipelines > 1)
769 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
770 if (ctx->default_read_buf_len > 0)
771 SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len);
772
773 SSL_CTX_up_ref(ctx);
774 s->ctx = ctx;
775 s->ext.debug_cb = 0;
776 s->ext.debug_arg = NULL;
777 s->ext.ticket_expected = 0;
778 s->ext.status_type = ctx->ext.status_type;
779 s->ext.status_expected = 0;
780 s->ext.ocsp.ids = NULL;
781 s->ext.ocsp.exts = NULL;
782 s->ext.ocsp.resp = NULL;
783 s->ext.ocsp.resp_len = 0;
784 SSL_CTX_up_ref(ctx);
785 s->session_ctx = ctx;
786 if (ctx->ext.ecpointformats) {
787 s->ext.ecpointformats =
788 OPENSSL_memdup(ctx->ext.ecpointformats,
789 ctx->ext.ecpointformats_len);
790 if (!s->ext.ecpointformats) {
791 s->ext.ecpointformats_len = 0;
792 goto err;
793 }
794 s->ext.ecpointformats_len =
795 ctx->ext.ecpointformats_len;
796 }
797 if (ctx->ext.supportedgroups) {
798 s->ext.supportedgroups =
799 OPENSSL_memdup(ctx->ext.supportedgroups,
800 ctx->ext.supportedgroups_len
801 * sizeof(*ctx->ext.supportedgroups));
802 if (!s->ext.supportedgroups) {
803 s->ext.supportedgroups_len = 0;
804 goto err;
805 }
806 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
807 }
808
809 #ifndef OPENSSL_NO_NEXTPROTONEG
810 s->ext.npn = NULL;
811 #endif
812
813 if (s->ctx->ext.alpn) {
814 s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
815 if (s->ext.alpn == NULL) {
816 s->ext.alpn_len = 0;
817 goto err;
818 }
819 memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
820 s->ext.alpn_len = s->ctx->ext.alpn_len;
821 }
822
823 s->verified_chain = NULL;
824 s->verify_result = X509_V_OK;
825
826 s->default_passwd_callback = ctx->default_passwd_callback;
827 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
828
829 s->method = ctx->method;
830
831 s->key_update = SSL_KEY_UPDATE_NONE;
832
833 s->allow_early_data_cb = ctx->allow_early_data_cb;
834 s->allow_early_data_cb_data = ctx->allow_early_data_cb_data;
835
836 if (!s->method->ssl_new(s))
837 goto err;
838
839 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
840
841 if (!SSL_clear(s))
842 goto err;
843
844 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
845 goto err;
846
847 #ifndef OPENSSL_NO_PSK
848 s->psk_client_callback = ctx->psk_client_callback;
849 s->psk_server_callback = ctx->psk_server_callback;
850 #endif
851 s->psk_find_session_cb = ctx->psk_find_session_cb;
852 s->psk_use_session_cb = ctx->psk_use_session_cb;
853
854 s->async_cb = ctx->async_cb;
855 s->async_cb_arg = ctx->async_cb_arg;
856
857 s->job = NULL;
858
859 #ifndef OPENSSL_NO_CT
860 if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
861 ctx->ct_validation_callback_arg))
862 goto err;
863 #endif
864
865 return s;
866 err:
867 SSL_free(s);
868 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
869 return NULL;
870 }
871
SSL_is_dtls(const SSL * s)872 int SSL_is_dtls(const SSL *s)
873 {
874 return SSL_IS_DTLS(s) ? 1 : 0;
875 }
876
SSL_up_ref(SSL * s)877 int SSL_up_ref(SSL *s)
878 {
879 int i;
880
881 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
882 return 0;
883
884 REF_PRINT_COUNT("SSL", s);
885 REF_ASSERT_ISNT(i < 2);
886 return ((i > 1) ? 1 : 0);
887 }
888
SSL_CTX_set_session_id_context(SSL_CTX * ctx,const unsigned char * sid_ctx,unsigned int sid_ctx_len)889 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
890 unsigned int sid_ctx_len)
891 {
892 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
893 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
894 return 0;
895 }
896 ctx->sid_ctx_length = sid_ctx_len;
897 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
898
899 return 1;
900 }
901
SSL_set_session_id_context(SSL * ssl,const unsigned char * sid_ctx,unsigned int sid_ctx_len)902 int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
903 unsigned int sid_ctx_len)
904 {
905 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
906 ERR_raise(ERR_LIB_SSL, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
907 return 0;
908 }
909 ssl->sid_ctx_length = sid_ctx_len;
910 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
911
912 return 1;
913 }
914
SSL_CTX_set_generate_session_id(SSL_CTX * ctx,GEN_SESSION_CB cb)915 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
916 {
917 if (!CRYPTO_THREAD_write_lock(ctx->lock))
918 return 0;
919 ctx->generate_session_id = cb;
920 CRYPTO_THREAD_unlock(ctx->lock);
921 return 1;
922 }
923
SSL_set_generate_session_id(SSL * ssl,GEN_SESSION_CB cb)924 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
925 {
926 if (!CRYPTO_THREAD_write_lock(ssl->lock))
927 return 0;
928 ssl->generate_session_id = cb;
929 CRYPTO_THREAD_unlock(ssl->lock);
930 return 1;
931 }
932
SSL_has_matching_session_id(const SSL * ssl,const unsigned char * id,unsigned int id_len)933 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
934 unsigned int id_len)
935 {
936 /*
937 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
938 * we can "construct" a session to give us the desired check - i.e. to
939 * find if there's a session in the hash table that would conflict with
940 * any new session built out of this id/id_len and the ssl_version in use
941 * by this SSL.
942 */
943 SSL_SESSION r, *p;
944
945 if (id_len > sizeof(r.session_id))
946 return 0;
947
948 r.ssl_version = ssl->version;
949 r.session_id_length = id_len;
950 memcpy(r.session_id, id, id_len);
951
952 if (!CRYPTO_THREAD_read_lock(ssl->session_ctx->lock))
953 return 0;
954 p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
955 CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
956 return (p != NULL);
957 }
958
SSL_CTX_set_purpose(SSL_CTX * s,int purpose)959 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
960 {
961 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
962 }
963
SSL_set_purpose(SSL * s,int purpose)964 int SSL_set_purpose(SSL *s, int purpose)
965 {
966 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
967 }
968
SSL_CTX_set_trust(SSL_CTX * s,int trust)969 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
970 {
971 return X509_VERIFY_PARAM_set_trust(s->param, trust);
972 }
973
SSL_set_trust(SSL * s,int trust)974 int SSL_set_trust(SSL *s, int trust)
975 {
976 return X509_VERIFY_PARAM_set_trust(s->param, trust);
977 }
978
SSL_set1_host(SSL * s,const char * hostname)979 int SSL_set1_host(SSL *s, const char *hostname)
980 {
981 /* If a hostname is provided and parses as an IP address,
982 * treat it as such. */
983 if (hostname && X509_VERIFY_PARAM_set1_ip_asc(s->param, hostname) == 1)
984 return 1;
985
986 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
987 }
988
SSL_add1_host(SSL * s,const char * hostname)989 int SSL_add1_host(SSL *s, const char *hostname)
990 {
991 /* If a hostname is provided and parses as an IP address,
992 * treat it as such. */
993 if (hostname)
994 {
995 ASN1_OCTET_STRING *ip;
996 char *old_ip;
997
998 ip = a2i_IPADDRESS(hostname);
999 if (ip) {
1000 /* We didn't want it; only to check if it *is* an IP address */
1001 ASN1_OCTET_STRING_free(ip);
1002
1003 old_ip = X509_VERIFY_PARAM_get1_ip_asc(s->param);
1004 if (old_ip)
1005 {
1006 OPENSSL_free(old_ip);
1007 /* There can be only one IP address */
1008 return 0;
1009 }
1010
1011 return X509_VERIFY_PARAM_set1_ip_asc(s->param, hostname);
1012 }
1013 }
1014
1015 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
1016 }
1017
SSL_set_hostflags(SSL * s,unsigned int flags)1018 void SSL_set_hostflags(SSL *s, unsigned int flags)
1019 {
1020 X509_VERIFY_PARAM_set_hostflags(s->param, flags);
1021 }
1022
SSL_get0_peername(SSL * s)1023 const char *SSL_get0_peername(SSL *s)
1024 {
1025 return X509_VERIFY_PARAM_get0_peername(s->param);
1026 }
1027
SSL_CTX_dane_enable(SSL_CTX * ctx)1028 int SSL_CTX_dane_enable(SSL_CTX *ctx)
1029 {
1030 return dane_ctx_enable(&ctx->dane);
1031 }
1032
SSL_CTX_dane_set_flags(SSL_CTX * ctx,unsigned long flags)1033 unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
1034 {
1035 unsigned long orig = ctx->dane.flags;
1036
1037 ctx->dane.flags |= flags;
1038 return orig;
1039 }
1040
SSL_CTX_dane_clear_flags(SSL_CTX * ctx,unsigned long flags)1041 unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
1042 {
1043 unsigned long orig = ctx->dane.flags;
1044
1045 ctx->dane.flags &= ~flags;
1046 return orig;
1047 }
1048
SSL_dane_enable(SSL * s,const char * basedomain)1049 int SSL_dane_enable(SSL *s, const char *basedomain)
1050 {
1051 SSL_DANE *dane = &s->dane;
1052
1053 if (s->ctx->dane.mdmax == 0) {
1054 ERR_raise(ERR_LIB_SSL, SSL_R_CONTEXT_NOT_DANE_ENABLED);
1055 return 0;
1056 }
1057 if (dane->trecs != NULL) {
1058 ERR_raise(ERR_LIB_SSL, SSL_R_DANE_ALREADY_ENABLED);
1059 return 0;
1060 }
1061
1062 /*
1063 * Default SNI name. This rejects empty names, while set1_host below
1064 * accepts them and disables host name checks. To avoid side-effects with
1065 * invalid input, set the SNI name first.
1066 */
1067 if (s->ext.hostname == NULL) {
1068 if (!SSL_set_tlsext_host_name(s, basedomain)) {
1069 ERR_raise(ERR_LIB_SSL, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1070 return -1;
1071 }
1072 }
1073
1074 /* Primary RFC6125 reference identifier */
1075 if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
1076 ERR_raise(ERR_LIB_SSL, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1077 return -1;
1078 }
1079
1080 dane->mdpth = -1;
1081 dane->pdpth = -1;
1082 dane->dctx = &s->ctx->dane;
1083 dane->trecs = sk_danetls_record_new_null();
1084
1085 if (dane->trecs == NULL) {
1086 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1087 return -1;
1088 }
1089 return 1;
1090 }
1091
SSL_dane_set_flags(SSL * ssl,unsigned long flags)1092 unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
1093 {
1094 unsigned long orig = ssl->dane.flags;
1095
1096 ssl->dane.flags |= flags;
1097 return orig;
1098 }
1099
SSL_dane_clear_flags(SSL * ssl,unsigned long flags)1100 unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
1101 {
1102 unsigned long orig = ssl->dane.flags;
1103
1104 ssl->dane.flags &= ~flags;
1105 return orig;
1106 }
1107
SSL_get0_dane_authority(SSL * s,X509 ** mcert,EVP_PKEY ** mspki)1108 int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
1109 {
1110 SSL_DANE *dane = &s->dane;
1111
1112 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1113 return -1;
1114 if (dane->mtlsa) {
1115 if (mcert)
1116 *mcert = dane->mcert;
1117 if (mspki)
1118 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
1119 }
1120 return dane->mdpth;
1121 }
1122
SSL_get0_dane_tlsa(SSL * s,uint8_t * usage,uint8_t * selector,uint8_t * mtype,const unsigned char ** data,size_t * dlen)1123 int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
1124 uint8_t *mtype, const unsigned char **data, size_t *dlen)
1125 {
1126 SSL_DANE *dane = &s->dane;
1127
1128 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1129 return -1;
1130 if (dane->mtlsa) {
1131 if (usage)
1132 *usage = dane->mtlsa->usage;
1133 if (selector)
1134 *selector = dane->mtlsa->selector;
1135 if (mtype)
1136 *mtype = dane->mtlsa->mtype;
1137 if (data)
1138 *data = dane->mtlsa->data;
1139 if (dlen)
1140 *dlen = dane->mtlsa->dlen;
1141 }
1142 return dane->mdpth;
1143 }
1144
SSL_get0_dane(SSL * s)1145 SSL_DANE *SSL_get0_dane(SSL *s)
1146 {
1147 return &s->dane;
1148 }
1149
SSL_dane_tlsa_add(SSL * s,uint8_t usage,uint8_t selector,uint8_t mtype,const unsigned char * data,size_t dlen)1150 int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
1151 uint8_t mtype, const unsigned char *data, size_t dlen)
1152 {
1153 return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen);
1154 }
1155
SSL_CTX_dane_mtype_set(SSL_CTX * ctx,const EVP_MD * md,uint8_t mtype,uint8_t ord)1156 int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
1157 uint8_t ord)
1158 {
1159 return dane_mtype_set(&ctx->dane, md, mtype, ord);
1160 }
1161
SSL_CTX_set1_param(SSL_CTX * ctx,X509_VERIFY_PARAM * vpm)1162 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
1163 {
1164 return X509_VERIFY_PARAM_set1(ctx->param, vpm);
1165 }
1166
SSL_set1_param(SSL * ssl,X509_VERIFY_PARAM * vpm)1167 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
1168 {
1169 return X509_VERIFY_PARAM_set1(ssl->param, vpm);
1170 }
1171
SSL_CTX_get0_param(SSL_CTX * ctx)1172 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
1173 {
1174 return ctx->param;
1175 }
1176
SSL_get0_param(SSL * ssl)1177 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
1178 {
1179 return ssl->param;
1180 }
1181
SSL_certs_clear(SSL * s)1182 void SSL_certs_clear(SSL *s)
1183 {
1184 ssl_cert_clear_certs(s->cert);
1185 }
1186
SSL_free(SSL * s)1187 void SSL_free(SSL *s)
1188 {
1189 int i;
1190
1191 if (s == NULL)
1192 return;
1193 CRYPTO_DOWN_REF(&s->references, &i, s->lock);
1194 REF_PRINT_COUNT("SSL", s);
1195 if (i > 0)
1196 return;
1197 REF_ASSERT_ISNT(i < 0);
1198
1199 X509_VERIFY_PARAM_free(s->param);
1200 dane_final(&s->dane);
1201 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
1202
1203 RECORD_LAYER_release(&s->rlayer);
1204
1205 /* Ignore return value */
1206 ssl_free_wbio_buffer(s);
1207
1208 BIO_free_all(s->wbio);
1209 s->wbio = NULL;
1210 BIO_free_all(s->rbio);
1211 s->rbio = NULL;
1212
1213 BUF_MEM_free(s->init_buf);
1214
1215 /* add extra stuff */
1216 sk_SSL_CIPHER_free(s->cipher_list);
1217 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1218 sk_SSL_CIPHER_free(s->tls13_ciphersuites);
1219 sk_SSL_CIPHER_free(s->peer_ciphers);
1220
1221 /* Make the next call work :-) */
1222 if (s->session != NULL) {
1223 ssl_clear_bad_session(s);
1224 SSL_SESSION_free(s->session);
1225 }
1226 SSL_SESSION_free(s->psksession);
1227 OPENSSL_free(s->psksession_id);
1228
1229 ssl_cert_free(s->cert);
1230 OPENSSL_free(s->shared_sigalgs);
1231 /* Free up if allocated */
1232
1233 OPENSSL_free(s->ext.hostname);
1234 SSL_CTX_free(s->session_ctx);
1235 OPENSSL_free(s->ext.ecpointformats);
1236 OPENSSL_free(s->ext.peer_ecpointformats);
1237 OPENSSL_free(s->ext.supportedgroups);
1238 OPENSSL_free(s->ext.peer_supportedgroups);
1239 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
1240 #ifndef OPENSSL_NO_OCSP
1241 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
1242 #endif
1243 #ifndef OPENSSL_NO_CT
1244 SCT_LIST_free(s->scts);
1245 OPENSSL_free(s->ext.scts);
1246 #endif
1247 OPENSSL_free(s->ext.ocsp.resp);
1248 OPENSSL_free(s->ext.alpn);
1249 OPENSSL_free(s->ext.tls13_cookie);
1250 if (s->clienthello != NULL)
1251 OPENSSL_free(s->clienthello->pre_proc_exts);
1252 OPENSSL_free(s->clienthello);
1253 OPENSSL_free(s->pha_context);
1254 EVP_MD_CTX_free(s->pha_dgst);
1255
1256 sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free);
1257 sk_X509_NAME_pop_free(s->client_ca_names, X509_NAME_free);
1258
1259 sk_X509_pop_free(s->verified_chain, X509_free);
1260
1261 if (s->method != NULL)
1262 s->method->ssl_free(s);
1263
1264 /*
1265 * Must occur after s->method->ssl_free(). The DTLS sent_messages queue
1266 * may reference the EVP_CIPHER_CTX/EVP_MD_CTX that are freed here.
1267 */
1268 clear_ciphers(s);
1269
1270 SSL_CTX_free(s->ctx);
1271
1272 ASYNC_WAIT_CTX_free(s->waitctx);
1273
1274 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1275 OPENSSL_free(s->ext.npn);
1276 #endif
1277
1278 #ifndef OPENSSL_NO_SRTP
1279 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
1280 #endif
1281
1282 CRYPTO_THREAD_lock_free(s->lock);
1283
1284 OPENSSL_free(s);
1285 }
1286
SSL_set0_rbio(SSL * s,BIO * rbio)1287 void SSL_set0_rbio(SSL *s, BIO *rbio)
1288 {
1289 BIO_free_all(s->rbio);
1290 s->rbio = rbio;
1291 }
1292
SSL_set0_wbio(SSL * s,BIO * wbio)1293 void SSL_set0_wbio(SSL *s, BIO *wbio)
1294 {
1295 /*
1296 * If the output buffering BIO is still in place, remove it
1297 */
1298 if (s->bbio != NULL)
1299 s->wbio = BIO_pop(s->wbio);
1300
1301 BIO_free_all(s->wbio);
1302 s->wbio = wbio;
1303
1304 /* Re-attach |bbio| to the new |wbio|. */
1305 if (s->bbio != NULL)
1306 s->wbio = BIO_push(s->bbio, s->wbio);
1307 }
1308
SSL_set_bio(SSL * s,BIO * rbio,BIO * wbio)1309 void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
1310 {
1311 /*
1312 * For historical reasons, this function has many different cases in
1313 * ownership handling.
1314 */
1315
1316 /* If nothing has changed, do nothing */
1317 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
1318 return;
1319
1320 /*
1321 * If the two arguments are equal then one fewer reference is granted by the
1322 * caller than we want to take
1323 */
1324 if (rbio != NULL && rbio == wbio)
1325 BIO_up_ref(rbio);
1326
1327 /*
1328 * If only the wbio is changed only adopt one reference.
1329 */
1330 if (rbio == SSL_get_rbio(s)) {
1331 SSL_set0_wbio(s, wbio);
1332 return;
1333 }
1334 /*
1335 * There is an asymmetry here for historical reasons. If only the rbio is
1336 * changed AND the rbio and wbio were originally different, then we only
1337 * adopt one reference.
1338 */
1339 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
1340 SSL_set0_rbio(s, rbio);
1341 return;
1342 }
1343
1344 /* Otherwise, adopt both references. */
1345 SSL_set0_rbio(s, rbio);
1346 SSL_set0_wbio(s, wbio);
1347 }
1348
SSL_get_rbio(const SSL * s)1349 BIO *SSL_get_rbio(const SSL *s)
1350 {
1351 return s->rbio;
1352 }
1353
SSL_get_wbio(const SSL * s)1354 BIO *SSL_get_wbio(const SSL *s)
1355 {
1356 if (s->bbio != NULL) {
1357 /*
1358 * If |bbio| is active, the true caller-configured BIO is its
1359 * |next_bio|.
1360 */
1361 return BIO_next(s->bbio);
1362 }
1363 return s->wbio;
1364 }
1365
SSL_get_fd(const SSL * s)1366 int SSL_get_fd(const SSL *s)
1367 {
1368 return SSL_get_rfd(s);
1369 }
1370
SSL_get_rfd(const SSL * s)1371 int SSL_get_rfd(const SSL *s)
1372 {
1373 int ret = -1;
1374 BIO *b, *r;
1375
1376 b = SSL_get_rbio(s);
1377 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1378 if (r != NULL)
1379 BIO_get_fd(r, &ret);
1380 return ret;
1381 }
1382
SSL_get_wfd(const SSL * s)1383 int SSL_get_wfd(const SSL *s)
1384 {
1385 int ret = -1;
1386 BIO *b, *r;
1387
1388 b = SSL_get_wbio(s);
1389 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1390 if (r != NULL)
1391 BIO_get_fd(r, &ret);
1392 return ret;
1393 }
1394
1395 #ifndef OPENSSL_NO_SOCK
SSL_set_fd(SSL * s,int fd)1396 int SSL_set_fd(SSL *s, int fd)
1397 {
1398 int ret = 0;
1399 BIO *bio = NULL;
1400
1401 bio = BIO_new(BIO_s_socket());
1402
1403 if (bio == NULL) {
1404 ERR_raise(ERR_LIB_SSL, ERR_R_BUF_LIB);
1405 goto err;
1406 }
1407 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1408 SSL_set_bio(s, bio, bio);
1409 #ifndef OPENSSL_NO_KTLS
1410 /*
1411 * The new socket is created successfully regardless of ktls_enable.
1412 * ktls_enable doesn't change any functionality of the socket, except
1413 * changing the setsockopt to enable the processing of ktls_start.
1414 * Thus, it is not a problem to call it for non-TLS sockets.
1415 */
1416 ktls_enable(fd);
1417 #endif /* OPENSSL_NO_KTLS */
1418 ret = 1;
1419 err:
1420 return ret;
1421 }
1422
SSL_set_wfd(SSL * s,int fd)1423 int SSL_set_wfd(SSL *s, int fd)
1424 {
1425 BIO *rbio = SSL_get_rbio(s);
1426
1427 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
1428 || (int)BIO_get_fd(rbio, NULL) != fd) {
1429 BIO *bio = BIO_new(BIO_s_socket());
1430
1431 if (bio == NULL) {
1432 ERR_raise(ERR_LIB_SSL, ERR_R_BUF_LIB);
1433 return 0;
1434 }
1435 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1436 SSL_set0_wbio(s, bio);
1437 #ifndef OPENSSL_NO_KTLS
1438 /*
1439 * The new socket is created successfully regardless of ktls_enable.
1440 * ktls_enable doesn't change any functionality of the socket, except
1441 * changing the setsockopt to enable the processing of ktls_start.
1442 * Thus, it is not a problem to call it for non-TLS sockets.
1443 */
1444 ktls_enable(fd);
1445 #endif /* OPENSSL_NO_KTLS */
1446 } else {
1447 BIO_up_ref(rbio);
1448 SSL_set0_wbio(s, rbio);
1449 }
1450 return 1;
1451 }
1452
SSL_set_rfd(SSL * s,int fd)1453 int SSL_set_rfd(SSL *s, int fd)
1454 {
1455 BIO *wbio = SSL_get_wbio(s);
1456
1457 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
1458 || ((int)BIO_get_fd(wbio, NULL) != fd)) {
1459 BIO *bio = BIO_new(BIO_s_socket());
1460
1461 if (bio == NULL) {
1462 ERR_raise(ERR_LIB_SSL, ERR_R_BUF_LIB);
1463 return 0;
1464 }
1465 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1466 SSL_set0_rbio(s, bio);
1467 } else {
1468 BIO_up_ref(wbio);
1469 SSL_set0_rbio(s, wbio);
1470 }
1471
1472 return 1;
1473 }
1474 #endif
1475
1476 /* return length of latest Finished message we sent, copy to 'buf' */
SSL_get_finished(const SSL * s,void * buf,size_t count)1477 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
1478 {
1479 size_t ret = 0;
1480
1481 ret = s->s3.tmp.finish_md_len;
1482 if (count > ret)
1483 count = ret;
1484 memcpy(buf, s->s3.tmp.finish_md, count);
1485 return ret;
1486 }
1487
1488 /* return length of latest Finished message we expected, copy to 'buf' */
SSL_get_peer_finished(const SSL * s,void * buf,size_t count)1489 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
1490 {
1491 size_t ret = 0;
1492
1493 ret = s->s3.tmp.peer_finish_md_len;
1494 if (count > ret)
1495 count = ret;
1496 memcpy(buf, s->s3.tmp.peer_finish_md, count);
1497 return ret;
1498 }
1499
SSL_get_verify_mode(const SSL * s)1500 int SSL_get_verify_mode(const SSL *s)
1501 {
1502 return s->verify_mode;
1503 }
1504
SSL_get_verify_depth(const SSL * s)1505 int SSL_get_verify_depth(const SSL *s)
1506 {
1507 return X509_VERIFY_PARAM_get_depth(s->param);
1508 }
1509
SSL_get_verify_callback(const SSL * s)1510 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
1511 return s->verify_callback;
1512 }
1513
SSL_CTX_get_verify_mode(const SSL_CTX * ctx)1514 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
1515 {
1516 return ctx->verify_mode;
1517 }
1518
SSL_CTX_get_verify_depth(const SSL_CTX * ctx)1519 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
1520 {
1521 return X509_VERIFY_PARAM_get_depth(ctx->param);
1522 }
1523
SSL_CTX_get_verify_callback(const SSL_CTX * ctx)1524 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
1525 return ctx->default_verify_callback;
1526 }
1527
SSL_set_verify(SSL * s,int mode,int (* callback)(int ok,X509_STORE_CTX * ctx))1528 void SSL_set_verify(SSL *s, int mode,
1529 int (*callback) (int ok, X509_STORE_CTX *ctx))
1530 {
1531 s->verify_mode = mode;
1532 if (callback != NULL)
1533 s->verify_callback = callback;
1534 }
1535
SSL_set_verify_depth(SSL * s,int depth)1536 void SSL_set_verify_depth(SSL *s, int depth)
1537 {
1538 X509_VERIFY_PARAM_set_depth(s->param, depth);
1539 }
1540
SSL_set_read_ahead(SSL * s,int yes)1541 void SSL_set_read_ahead(SSL *s, int yes)
1542 {
1543 RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
1544 }
1545
SSL_get_read_ahead(const SSL * s)1546 int SSL_get_read_ahead(const SSL *s)
1547 {
1548 return RECORD_LAYER_get_read_ahead(&s->rlayer);
1549 }
1550
SSL_pending(const SSL * s)1551 int SSL_pending(const SSL *s)
1552 {
1553 size_t pending = s->method->ssl_pending(s);
1554
1555 /*
1556 * SSL_pending cannot work properly if read-ahead is enabled
1557 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
1558 * impossible to fix since SSL_pending cannot report errors that may be
1559 * observed while scanning the new data. (Note that SSL_pending() is
1560 * often used as a boolean value, so we'd better not return -1.)
1561 *
1562 * SSL_pending also cannot work properly if the value >INT_MAX. In that case
1563 * we just return INT_MAX.
1564 */
1565 return pending < INT_MAX ? (int)pending : INT_MAX;
1566 }
1567
SSL_has_pending(const SSL * s)1568 int SSL_has_pending(const SSL *s)
1569 {
1570 /*
1571 * Similar to SSL_pending() but returns a 1 to indicate that we have
1572 * processed or unprocessed data available or 0 otherwise (as opposed to the
1573 * number of bytes available). Unlike SSL_pending() this will take into
1574 * account read_ahead data. A 1 return simply indicates that we have data.
1575 * That data may not result in any application data, or we may fail to parse
1576 * the records for some reason.
1577 */
1578
1579 /* Check buffered app data if any first */
1580 if (SSL_IS_DTLS(s)) {
1581 DTLS1_RECORD_DATA *rdata;
1582 pitem *item, *iter;
1583
1584 iter = pqueue_iterator(s->rlayer.d->buffered_app_data.q);
1585 while ((item = pqueue_next(&iter)) != NULL) {
1586 rdata = item->data;
1587 if (rdata->rrec.length > 0)
1588 return 1;
1589 }
1590 }
1591
1592 if (RECORD_LAYER_processed_read_pending(&s->rlayer))
1593 return 1;
1594
1595 return RECORD_LAYER_read_pending(&s->rlayer);
1596 }
1597
SSL_get1_peer_certificate(const SSL * s)1598 X509 *SSL_get1_peer_certificate(const SSL *s)
1599 {
1600 X509 *r = SSL_get0_peer_certificate(s);
1601
1602 if (r != NULL)
1603 X509_up_ref(r);
1604
1605 return r;
1606 }
1607
SSL_get0_peer_certificate(const SSL * s)1608 X509 *SSL_get0_peer_certificate(const SSL *s)
1609 {
1610 if ((s == NULL) || (s->session == NULL))
1611 return NULL;
1612 else
1613 return s->session->peer;
1614 }
1615
STACK_OF(X509)1616 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
1617 {
1618 STACK_OF(X509) *r;
1619
1620 if ((s == NULL) || (s->session == NULL))
1621 r = NULL;
1622 else
1623 r = s->session->peer_chain;
1624
1625 /*
1626 * If we are a client, cert_chain includes the peer's own certificate; if
1627 * we are a server, it does not.
1628 */
1629
1630 return r;
1631 }
1632
1633 /*
1634 * Now in theory, since the calling process own 't' it should be safe to
1635 * modify. We need to be able to read f without being hassled
1636 */
SSL_copy_session_id(SSL * t,const SSL * f)1637 int SSL_copy_session_id(SSL *t, const SSL *f)
1638 {
1639 int i;
1640 /* Do we need to do SSL locking? */
1641 if (!SSL_set_session(t, SSL_get_session(f))) {
1642 return 0;
1643 }
1644
1645 /*
1646 * what if we are setup for one protocol version but want to talk another
1647 */
1648 if (t->method != f->method) {
1649 t->method->ssl_free(t);
1650 t->method = f->method;
1651 if (t->method->ssl_new(t) == 0)
1652 return 0;
1653 }
1654
1655 CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock);
1656 ssl_cert_free(t->cert);
1657 t->cert = f->cert;
1658 if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
1659 return 0;
1660 }
1661
1662 return 1;
1663 }
1664
1665 /* Fix this so it checks all the valid key/cert options */
SSL_CTX_check_private_key(const SSL_CTX * ctx)1666 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
1667 {
1668 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
1669 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_ASSIGNED);
1670 return 0;
1671 }
1672 if (ctx->cert->key->privatekey == NULL) {
1673 ERR_raise(ERR_LIB_SSL, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1674 return 0;
1675 }
1676 return X509_check_private_key
1677 (ctx->cert->key->x509, ctx->cert->key->privatekey);
1678 }
1679
1680 /* Fix this function so that it takes an optional type parameter */
SSL_check_private_key(const SSL * ssl)1681 int SSL_check_private_key(const SSL *ssl)
1682 {
1683 if (ssl == NULL) {
1684 ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_NULL_PARAMETER);
1685 return 0;
1686 }
1687 if (ssl->cert->key->x509 == NULL) {
1688 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_ASSIGNED);
1689 return 0;
1690 }
1691 if (ssl->cert->key->privatekey == NULL) {
1692 ERR_raise(ERR_LIB_SSL, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1693 return 0;
1694 }
1695 return X509_check_private_key(ssl->cert->key->x509,
1696 ssl->cert->key->privatekey);
1697 }
1698
SSL_waiting_for_async(SSL * s)1699 int SSL_waiting_for_async(SSL *s)
1700 {
1701 if (s->job)
1702 return 1;
1703
1704 return 0;
1705 }
1706
SSL_get_all_async_fds(SSL * s,OSSL_ASYNC_FD * fds,size_t * numfds)1707 int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
1708 {
1709 ASYNC_WAIT_CTX *ctx = s->waitctx;
1710
1711 if (ctx == NULL)
1712 return 0;
1713 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
1714 }
1715
SSL_get_changed_async_fds(SSL * s,OSSL_ASYNC_FD * addfd,size_t * numaddfds,OSSL_ASYNC_FD * delfd,size_t * numdelfds)1716 int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
1717 OSSL_ASYNC_FD *delfd, size_t *numdelfds)
1718 {
1719 ASYNC_WAIT_CTX *ctx = s->waitctx;
1720
1721 if (ctx == NULL)
1722 return 0;
1723 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
1724 numdelfds);
1725 }
1726
SSL_CTX_set_async_callback(SSL_CTX * ctx,SSL_async_callback_fn callback)1727 int SSL_CTX_set_async_callback(SSL_CTX *ctx, SSL_async_callback_fn callback)
1728 {
1729 ctx->async_cb = callback;
1730 return 1;
1731 }
1732
SSL_CTX_set_async_callback_arg(SSL_CTX * ctx,void * arg)1733 int SSL_CTX_set_async_callback_arg(SSL_CTX *ctx, void *arg)
1734 {
1735 ctx->async_cb_arg = arg;
1736 return 1;
1737 }
1738
SSL_set_async_callback(SSL * s,SSL_async_callback_fn callback)1739 int SSL_set_async_callback(SSL *s, SSL_async_callback_fn callback)
1740 {
1741 s->async_cb = callback;
1742 return 1;
1743 }
1744
SSL_set_async_callback_arg(SSL * s,void * arg)1745 int SSL_set_async_callback_arg(SSL *s, void *arg)
1746 {
1747 s->async_cb_arg = arg;
1748 return 1;
1749 }
1750
SSL_get_async_status(SSL * s,int * status)1751 int SSL_get_async_status(SSL *s, int *status)
1752 {
1753 ASYNC_WAIT_CTX *ctx = s->waitctx;
1754
1755 if (ctx == NULL)
1756 return 0;
1757 *status = ASYNC_WAIT_CTX_get_status(ctx);
1758 return 1;
1759 }
1760
SSL_accept(SSL * s)1761 int SSL_accept(SSL *s)
1762 {
1763 if (s->handshake_func == NULL) {
1764 /* Not properly initialized yet */
1765 SSL_set_accept_state(s);
1766 }
1767
1768 return SSL_do_handshake(s);
1769 }
1770
SSL_connect(SSL * s)1771 int SSL_connect(SSL *s)
1772 {
1773 if (s->handshake_func == NULL) {
1774 /* Not properly initialized yet */
1775 SSL_set_connect_state(s);
1776 }
1777
1778 return SSL_do_handshake(s);
1779 }
1780
SSL_get_default_timeout(const SSL * s)1781 long SSL_get_default_timeout(const SSL *s)
1782 {
1783 return s->method->get_timeout();
1784 }
1785
ssl_async_wait_ctx_cb(void * arg)1786 static int ssl_async_wait_ctx_cb(void *arg)
1787 {
1788 SSL *s = (SSL *)arg;
1789
1790 return s->async_cb(s, s->async_cb_arg);
1791 }
1792
ssl_start_async_job(SSL * s,struct ssl_async_args * args,int (* func)(void *))1793 static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
1794 int (*func) (void *))
1795 {
1796 int ret;
1797 if (s->waitctx == NULL) {
1798 s->waitctx = ASYNC_WAIT_CTX_new();
1799 if (s->waitctx == NULL)
1800 return -1;
1801 if (s->async_cb != NULL
1802 && !ASYNC_WAIT_CTX_set_callback
1803 (s->waitctx, ssl_async_wait_ctx_cb, s))
1804 return -1;
1805 }
1806
1807 s->rwstate = SSL_NOTHING;
1808 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args,
1809 sizeof(struct ssl_async_args))) {
1810 case ASYNC_ERR:
1811 s->rwstate = SSL_NOTHING;
1812 ERR_raise(ERR_LIB_SSL, SSL_R_FAILED_TO_INIT_ASYNC);
1813 return -1;
1814 case ASYNC_PAUSE:
1815 s->rwstate = SSL_ASYNC_PAUSED;
1816 return -1;
1817 case ASYNC_NO_JOBS:
1818 s->rwstate = SSL_ASYNC_NO_JOBS;
1819 return -1;
1820 case ASYNC_FINISH:
1821 s->job = NULL;
1822 return ret;
1823 default:
1824 s->rwstate = SSL_NOTHING;
1825 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
1826 /* Shouldn't happen */
1827 return -1;
1828 }
1829 }
1830
ssl_io_intern(void * vargs)1831 static int ssl_io_intern(void *vargs)
1832 {
1833 struct ssl_async_args *args;
1834 SSL *s;
1835 void *buf;
1836 size_t num;
1837
1838 args = (struct ssl_async_args *)vargs;
1839 s = args->s;
1840 buf = args->buf;
1841 num = args->num;
1842 switch (args->type) {
1843 case READFUNC:
1844 return args->f.func_read(s, buf, num, &s->asyncrw);
1845 case WRITEFUNC:
1846 return args->f.func_write(s, buf, num, &s->asyncrw);
1847 case OTHERFUNC:
1848 return args->f.func_other(s);
1849 }
1850 return -1;
1851 }
1852
ssl_read_internal(SSL * s,void * buf,size_t num,size_t * readbytes)1853 int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1854 {
1855 if (s->handshake_func == NULL) {
1856 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
1857 return -1;
1858 }
1859
1860 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1861 s->rwstate = SSL_NOTHING;
1862 return 0;
1863 }
1864
1865 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1866 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
1867 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1868 return 0;
1869 }
1870 /*
1871 * If we are a client and haven't received the ServerHello etc then we
1872 * better do that
1873 */
1874 ossl_statem_check_finish_init(s, 0);
1875
1876 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1877 struct ssl_async_args args;
1878 int ret;
1879
1880 args.s = s;
1881 args.buf = buf;
1882 args.num = num;
1883 args.type = READFUNC;
1884 args.f.func_read = s->method->ssl_read;
1885
1886 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1887 *readbytes = s->asyncrw;
1888 return ret;
1889 } else {
1890 return s->method->ssl_read(s, buf, num, readbytes);
1891 }
1892 }
1893
SSL_read(SSL * s,void * buf,int num)1894 int SSL_read(SSL *s, void *buf, int num)
1895 {
1896 int ret;
1897 size_t readbytes;
1898
1899 if (num < 0) {
1900 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
1901 return -1;
1902 }
1903
1904 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
1905
1906 /*
1907 * The cast is safe here because ret should be <= INT_MAX because num is
1908 * <= INT_MAX
1909 */
1910 if (ret > 0)
1911 ret = (int)readbytes;
1912
1913 return ret;
1914 }
1915
SSL_read_ex(SSL * s,void * buf,size_t num,size_t * readbytes)1916 int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1917 {
1918 int ret = ssl_read_internal(s, buf, num, readbytes);
1919
1920 if (ret < 0)
1921 ret = 0;
1922 return ret;
1923 }
1924
SSL_read_early_data(SSL * s,void * buf,size_t num,size_t * readbytes)1925 int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
1926 {
1927 int ret;
1928
1929 if (!s->server) {
1930 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1931 return SSL_READ_EARLY_DATA_ERROR;
1932 }
1933
1934 switch (s->early_data_state) {
1935 case SSL_EARLY_DATA_NONE:
1936 if (!SSL_in_before(s)) {
1937 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1938 return SSL_READ_EARLY_DATA_ERROR;
1939 }
1940 /* fall through */
1941
1942 case SSL_EARLY_DATA_ACCEPT_RETRY:
1943 s->early_data_state = SSL_EARLY_DATA_ACCEPTING;
1944 ret = SSL_accept(s);
1945 if (ret <= 0) {
1946 /* NBIO or error */
1947 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
1948 return SSL_READ_EARLY_DATA_ERROR;
1949 }
1950 /* fall through */
1951
1952 case SSL_EARLY_DATA_READ_RETRY:
1953 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
1954 s->early_data_state = SSL_EARLY_DATA_READING;
1955 ret = SSL_read_ex(s, buf, num, readbytes);
1956 /*
1957 * State machine will update early_data_state to
1958 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData
1959 * message
1960 */
1961 if (ret > 0 || (ret <= 0 && s->early_data_state
1962 != SSL_EARLY_DATA_FINISHED_READING)) {
1963 s->early_data_state = SSL_EARLY_DATA_READ_RETRY;
1964 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
1965 : SSL_READ_EARLY_DATA_ERROR;
1966 }
1967 } else {
1968 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
1969 }
1970 *readbytes = 0;
1971 return SSL_READ_EARLY_DATA_FINISH;
1972
1973 default:
1974 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1975 return SSL_READ_EARLY_DATA_ERROR;
1976 }
1977 }
1978
SSL_get_early_data_status(const SSL * s)1979 int SSL_get_early_data_status(const SSL *s)
1980 {
1981 return s->ext.early_data;
1982 }
1983
ssl_peek_internal(SSL * s,void * buf,size_t num,size_t * readbytes)1984 static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1985 {
1986 if (s->handshake_func == NULL) {
1987 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
1988 return -1;
1989 }
1990
1991 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1992 return 0;
1993 }
1994 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1995 struct ssl_async_args args;
1996 int ret;
1997
1998 args.s = s;
1999 args.buf = buf;
2000 args.num = num;
2001 args.type = READFUNC;
2002 args.f.func_read = s->method->ssl_peek;
2003
2004 ret = ssl_start_async_job(s, &args, ssl_io_intern);
2005 *readbytes = s->asyncrw;
2006 return ret;
2007 } else {
2008 return s->method->ssl_peek(s, buf, num, readbytes);
2009 }
2010 }
2011
SSL_peek(SSL * s,void * buf,int num)2012 int SSL_peek(SSL *s, void *buf, int num)
2013 {
2014 int ret;
2015 size_t readbytes;
2016
2017 if (num < 0) {
2018 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
2019 return -1;
2020 }
2021
2022 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
2023
2024 /*
2025 * The cast is safe here because ret should be <= INT_MAX because num is
2026 * <= INT_MAX
2027 */
2028 if (ret > 0)
2029 ret = (int)readbytes;
2030
2031 return ret;
2032 }
2033
2034
SSL_peek_ex(SSL * s,void * buf,size_t num,size_t * readbytes)2035 int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
2036 {
2037 int ret = ssl_peek_internal(s, buf, num, readbytes);
2038
2039 if (ret < 0)
2040 ret = 0;
2041 return ret;
2042 }
2043
ssl_write_internal(SSL * s,const void * buf,size_t num,size_t * written)2044 int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
2045 {
2046 if (s->handshake_func == NULL) {
2047 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2048 return -1;
2049 }
2050
2051 if (s->shutdown & SSL_SENT_SHUTDOWN) {
2052 s->rwstate = SSL_NOTHING;
2053 ERR_raise(ERR_LIB_SSL, SSL_R_PROTOCOL_IS_SHUTDOWN);
2054 return -1;
2055 }
2056
2057 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
2058 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY
2059 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
2060 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2061 return 0;
2062 }
2063 /* If we are a client and haven't sent the Finished we better do that */
2064 ossl_statem_check_finish_init(s, 1);
2065
2066 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2067 int ret;
2068 struct ssl_async_args args;
2069
2070 args.s = s;
2071 args.buf = (void *)buf;
2072 args.num = num;
2073 args.type = WRITEFUNC;
2074 args.f.func_write = s->method->ssl_write;
2075
2076 ret = ssl_start_async_job(s, &args, ssl_io_intern);
2077 *written = s->asyncrw;
2078 return ret;
2079 } else {
2080 return s->method->ssl_write(s, buf, num, written);
2081 }
2082 }
2083
SSL_sendfile(SSL * s,int fd,off_t offset,size_t size,int flags)2084 ossl_ssize_t SSL_sendfile(SSL *s, int fd, off_t offset, size_t size, int flags)
2085 {
2086 ossl_ssize_t ret;
2087
2088 if (s->handshake_func == NULL) {
2089 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2090 return -1;
2091 }
2092
2093 if (s->shutdown & SSL_SENT_SHUTDOWN) {
2094 s->rwstate = SSL_NOTHING;
2095 ERR_raise(ERR_LIB_SSL, SSL_R_PROTOCOL_IS_SHUTDOWN);
2096 return -1;
2097 }
2098
2099 if (!BIO_get_ktls_send(s->wbio)) {
2100 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2101 return -1;
2102 }
2103
2104 /* If we have an alert to send, lets send it */
2105 if (s->s3.alert_dispatch) {
2106 ret = (ossl_ssize_t)s->method->ssl_dispatch_alert(s);
2107 if (ret <= 0) {
2108 /* SSLfatal() already called if appropriate */
2109 return ret;
2110 }
2111 /* if it went, fall through and send more stuff */
2112 }
2113
2114 s->rwstate = SSL_WRITING;
2115 if (BIO_flush(s->wbio) <= 0) {
2116 if (!BIO_should_retry(s->wbio)) {
2117 s->rwstate = SSL_NOTHING;
2118 } else {
2119 #ifdef EAGAIN
2120 set_sys_error(EAGAIN);
2121 #endif
2122 }
2123 return -1;
2124 }
2125
2126 #ifdef OPENSSL_NO_KTLS
2127 ERR_raise_data(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR,
2128 "can't call ktls_sendfile(), ktls disabled");
2129 return -1;
2130 #else
2131 ret = ktls_sendfile(SSL_get_wfd(s), fd, offset, size, flags);
2132 if (ret < 0) {
2133 #if defined(EAGAIN) && defined(EINTR) && defined(EBUSY)
2134 if ((get_last_sys_error() == EAGAIN) ||
2135 (get_last_sys_error() == EINTR) ||
2136 (get_last_sys_error() == EBUSY))
2137 BIO_set_retry_write(s->wbio);
2138 else
2139 #endif
2140 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2141 return ret;
2142 }
2143 s->rwstate = SSL_NOTHING;
2144 return ret;
2145 #endif
2146 }
2147
SSL_write(SSL * s,const void * buf,int num)2148 int SSL_write(SSL *s, const void *buf, int num)
2149 {
2150 int ret;
2151 size_t written;
2152
2153 if (num < 0) {
2154 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
2155 return -1;
2156 }
2157
2158 ret = ssl_write_internal(s, buf, (size_t)num, &written);
2159
2160 /*
2161 * The cast is safe here because ret should be <= INT_MAX because num is
2162 * <= INT_MAX
2163 */
2164 if (ret > 0)
2165 ret = (int)written;
2166
2167 return ret;
2168 }
2169
SSL_write_ex(SSL * s,const void * buf,size_t num,size_t * written)2170 int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
2171 {
2172 int ret = ssl_write_internal(s, buf, num, written);
2173
2174 if (ret < 0)
2175 ret = 0;
2176 return ret;
2177 }
2178
SSL_write_early_data(SSL * s,const void * buf,size_t num,size_t * written)2179 int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
2180 {
2181 int ret, early_data_state;
2182 size_t writtmp;
2183 uint32_t partialwrite;
2184
2185 switch (s->early_data_state) {
2186 case SSL_EARLY_DATA_NONE:
2187 if (s->server
2188 || !SSL_in_before(s)
2189 || ((s->session == NULL || s->session->ext.max_early_data == 0)
2190 && (s->psk_use_session_cb == NULL))) {
2191 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2192 return 0;
2193 }
2194 /* fall through */
2195
2196 case SSL_EARLY_DATA_CONNECT_RETRY:
2197 s->early_data_state = SSL_EARLY_DATA_CONNECTING;
2198 ret = SSL_connect(s);
2199 if (ret <= 0) {
2200 /* NBIO or error */
2201 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
2202 return 0;
2203 }
2204 /* fall through */
2205
2206 case SSL_EARLY_DATA_WRITE_RETRY:
2207 s->early_data_state = SSL_EARLY_DATA_WRITING;
2208 /*
2209 * We disable partial write for early data because we don't keep track
2210 * of how many bytes we've written between the SSL_write_ex() call and
2211 * the flush if the flush needs to be retried)
2212 */
2213 partialwrite = s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE;
2214 s->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE;
2215 ret = SSL_write_ex(s, buf, num, &writtmp);
2216 s->mode |= partialwrite;
2217 if (!ret) {
2218 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2219 return ret;
2220 }
2221 s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH;
2222 /* fall through */
2223
2224 case SSL_EARLY_DATA_WRITE_FLUSH:
2225 /* The buffering BIO is still in place so we need to flush it */
2226 if (statem_flush(s) != 1)
2227 return 0;
2228 *written = num;
2229 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2230 return 1;
2231
2232 case SSL_EARLY_DATA_FINISHED_READING:
2233 case SSL_EARLY_DATA_READ_RETRY:
2234 early_data_state = s->early_data_state;
2235 /* We are a server writing to an unauthenticated client */
2236 s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING;
2237 ret = SSL_write_ex(s, buf, num, written);
2238 /* The buffering BIO is still in place */
2239 if (ret)
2240 (void)BIO_flush(s->wbio);
2241 s->early_data_state = early_data_state;
2242 return ret;
2243
2244 default:
2245 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2246 return 0;
2247 }
2248 }
2249
SSL_shutdown(SSL * s)2250 int SSL_shutdown(SSL *s)
2251 {
2252 /*
2253 * Note that this function behaves differently from what one might
2254 * expect. Return values are 0 for no success (yet), 1 for success; but
2255 * calling it once is usually not enough, even if blocking I/O is used
2256 * (see ssl3_shutdown).
2257 */
2258
2259 if (s->handshake_func == NULL) {
2260 ERR_raise(ERR_LIB_SSL, SSL_R_UNINITIALIZED);
2261 return -1;
2262 }
2263
2264 if (!SSL_in_init(s)) {
2265 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2266 struct ssl_async_args args;
2267
2268 memset(&args, 0, sizeof(args));
2269 args.s = s;
2270 args.type = OTHERFUNC;
2271 args.f.func_other = s->method->ssl_shutdown;
2272
2273 return ssl_start_async_job(s, &args, ssl_io_intern);
2274 } else {
2275 return s->method->ssl_shutdown(s);
2276 }
2277 } else {
2278 ERR_raise(ERR_LIB_SSL, SSL_R_SHUTDOWN_WHILE_IN_INIT);
2279 return -1;
2280 }
2281 }
2282
SSL_key_update(SSL * s,int updatetype)2283 int SSL_key_update(SSL *s, int updatetype)
2284 {
2285 if (!SSL_IS_TLS13(s)) {
2286 ERR_raise(ERR_LIB_SSL, SSL_R_WRONG_SSL_VERSION);
2287 return 0;
2288 }
2289
2290 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
2291 && updatetype != SSL_KEY_UPDATE_REQUESTED) {
2292 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_KEY_UPDATE_TYPE);
2293 return 0;
2294 }
2295
2296 if (!SSL_is_init_finished(s)) {
2297 ERR_raise(ERR_LIB_SSL, SSL_R_STILL_IN_INIT);
2298 return 0;
2299 }
2300
2301 if (RECORD_LAYER_write_pending(&s->rlayer)) {
2302 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_WRITE_RETRY);
2303 return 0;
2304 }
2305
2306 ossl_statem_set_in_init(s, 1);
2307 s->key_update = updatetype;
2308 return 1;
2309 }
2310
SSL_get_key_update_type(const SSL * s)2311 int SSL_get_key_update_type(const SSL *s)
2312 {
2313 return s->key_update;
2314 }
2315
2316 /*
2317 * Can we accept a renegotiation request? If yes, set the flag and
2318 * return 1 if yes. If not, raise error and return 0.
2319 */
can_renegotiate(const SSL * s)2320 static int can_renegotiate(const SSL *s)
2321 {
2322 if (SSL_IS_TLS13(s)) {
2323 ERR_raise(ERR_LIB_SSL, SSL_R_WRONG_SSL_VERSION);
2324 return 0;
2325 }
2326
2327 if ((s->options & SSL_OP_NO_RENEGOTIATION) != 0) {
2328 ERR_raise(ERR_LIB_SSL, SSL_R_NO_RENEGOTIATION);
2329 return 0;
2330 }
2331
2332 return 1;
2333 }
2334
SSL_renegotiate(SSL * s)2335 int SSL_renegotiate(SSL *s)
2336 {
2337 if (!can_renegotiate(s))
2338 return 0;
2339
2340 s->renegotiate = 1;
2341 s->new_session = 1;
2342 return s->method->ssl_renegotiate(s);
2343 }
2344
SSL_renegotiate_abbreviated(SSL * s)2345 int SSL_renegotiate_abbreviated(SSL *s)
2346 {
2347 if (!can_renegotiate(s))
2348 return 0;
2349
2350 s->renegotiate = 1;
2351 s->new_session = 0;
2352 return s->method->ssl_renegotiate(s);
2353 }
2354
SSL_renegotiate_pending(const SSL * s)2355 int SSL_renegotiate_pending(const SSL *s)
2356 {
2357 /*
2358 * becomes true when negotiation is requested; false again once a
2359 * handshake has finished
2360 */
2361 return (s->renegotiate != 0);
2362 }
2363
SSL_new_session_ticket(SSL * s)2364 int SSL_new_session_ticket(SSL *s)
2365 {
2366 /* If we are in init because we're sending tickets, okay to send more. */
2367 if ((SSL_in_init(s) && s->ext.extra_tickets_expected == 0)
2368 || SSL_IS_FIRST_HANDSHAKE(s) || !s->server
2369 || !SSL_IS_TLS13(s))
2370 return 0;
2371 s->ext.extra_tickets_expected++;
2372 if (!RECORD_LAYER_write_pending(&s->rlayer) && !SSL_in_init(s))
2373 ossl_statem_set_in_init(s, 1);
2374 return 1;
2375 }
2376
SSL_ctrl(SSL * s,int cmd,long larg,void * parg)2377 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
2378 {
2379 long l;
2380
2381 switch (cmd) {
2382 case SSL_CTRL_GET_READ_AHEAD:
2383 return RECORD_LAYER_get_read_ahead(&s->rlayer);
2384 case SSL_CTRL_SET_READ_AHEAD:
2385 l = RECORD_LAYER_get_read_ahead(&s->rlayer);
2386 RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
2387 return l;
2388
2389 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2390 s->msg_callback_arg = parg;
2391 return 1;
2392
2393 case SSL_CTRL_MODE:
2394 return (s->mode |= larg);
2395 case SSL_CTRL_CLEAR_MODE:
2396 return (s->mode &= ~larg);
2397 case SSL_CTRL_GET_MAX_CERT_LIST:
2398 return (long)s->max_cert_list;
2399 case SSL_CTRL_SET_MAX_CERT_LIST:
2400 if (larg < 0)
2401 return 0;
2402 l = (long)s->max_cert_list;
2403 s->max_cert_list = (size_t)larg;
2404 return l;
2405 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2406 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2407 return 0;
2408 #ifndef OPENSSL_NO_KTLS
2409 if (s->wbio != NULL && BIO_get_ktls_send(s->wbio))
2410 return 0;
2411 #endif /* OPENSSL_NO_KTLS */
2412 s->max_send_fragment = larg;
2413 if (s->max_send_fragment < s->split_send_fragment)
2414 s->split_send_fragment = s->max_send_fragment;
2415 return 1;
2416 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2417 if ((size_t)larg > s->max_send_fragment || larg == 0)
2418 return 0;
2419 s->split_send_fragment = larg;
2420 return 1;
2421 case SSL_CTRL_SET_MAX_PIPELINES:
2422 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2423 return 0;
2424 s->max_pipelines = larg;
2425 if (larg > 1)
2426 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
2427 return 1;
2428 case SSL_CTRL_GET_RI_SUPPORT:
2429 return s->s3.send_connection_binding;
2430 case SSL_CTRL_SET_RETRY_VERIFY:
2431 s->rwstate = SSL_RETRY_VERIFY;
2432 return 1;
2433 case SSL_CTRL_CERT_FLAGS:
2434 return (s->cert->cert_flags |= larg);
2435 case SSL_CTRL_CLEAR_CERT_FLAGS:
2436 return (s->cert->cert_flags &= ~larg);
2437
2438 case SSL_CTRL_GET_RAW_CIPHERLIST:
2439 if (parg) {
2440 if (s->s3.tmp.ciphers_raw == NULL)
2441 return 0;
2442 *(unsigned char **)parg = s->s3.tmp.ciphers_raw;
2443 return (int)s->s3.tmp.ciphers_rawlen;
2444 } else {
2445 return TLS_CIPHER_LEN;
2446 }
2447 case SSL_CTRL_GET_EXTMS_SUPPORT:
2448 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
2449 return -1;
2450 if (s->session->flags & SSL_SESS_FLAG_EXTMS)
2451 return 1;
2452 else
2453 return 0;
2454 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2455 return ssl_check_allowed_versions(larg, s->max_proto_version)
2456 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2457 &s->min_proto_version);
2458 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2459 return s->min_proto_version;
2460 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2461 return ssl_check_allowed_versions(s->min_proto_version, larg)
2462 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2463 &s->max_proto_version);
2464 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2465 return s->max_proto_version;
2466 default:
2467 return s->method->ssl_ctrl(s, cmd, larg, parg);
2468 }
2469 }
2470
SSL_callback_ctrl(SSL * s,int cmd,void (* fp)(void))2471 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
2472 {
2473 switch (cmd) {
2474 case SSL_CTRL_SET_MSG_CALLBACK:
2475 s->msg_callback = (void (*)
2476 (int write_p, int version, int content_type,
2477 const void *buf, size_t len, SSL *ssl,
2478 void *arg))(fp);
2479 return 1;
2480
2481 default:
2482 return s->method->ssl_callback_ctrl(s, cmd, fp);
2483 }
2484 }
2485
LHASH_OF(SSL_SESSION)2486 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
2487 {
2488 return ctx->sessions;
2489 }
2490
ssl_tsan_load(SSL_CTX * ctx,TSAN_QUALIFIER int * stat)2491 static int ssl_tsan_load(SSL_CTX *ctx, TSAN_QUALIFIER int *stat)
2492 {
2493 int res = 0;
2494
2495 if (ssl_tsan_lock(ctx)) {
2496 res = tsan_load(stat);
2497 ssl_tsan_unlock(ctx);
2498 }
2499 return res;
2500 }
2501
SSL_CTX_ctrl(SSL_CTX * ctx,int cmd,long larg,void * parg)2502 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
2503 {
2504 long l;
2505 /* For some cases with ctx == NULL perform syntax checks */
2506 if (ctx == NULL) {
2507 switch (cmd) {
2508 case SSL_CTRL_SET_GROUPS_LIST:
2509 return tls1_set_groups_list(ctx, NULL, NULL, parg);
2510 case SSL_CTRL_SET_SIGALGS_LIST:
2511 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
2512 return tls1_set_sigalgs_list(NULL, parg, 0);
2513 default:
2514 return 0;
2515 }
2516 }
2517
2518 switch (cmd) {
2519 case SSL_CTRL_GET_READ_AHEAD:
2520 return ctx->read_ahead;
2521 case SSL_CTRL_SET_READ_AHEAD:
2522 l = ctx->read_ahead;
2523 ctx->read_ahead = larg;
2524 return l;
2525
2526 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2527 ctx->msg_callback_arg = parg;
2528 return 1;
2529
2530 case SSL_CTRL_GET_MAX_CERT_LIST:
2531 return (long)ctx->max_cert_list;
2532 case SSL_CTRL_SET_MAX_CERT_LIST:
2533 if (larg < 0)
2534 return 0;
2535 l = (long)ctx->max_cert_list;
2536 ctx->max_cert_list = (size_t)larg;
2537 return l;
2538
2539 case SSL_CTRL_SET_SESS_CACHE_SIZE:
2540 if (larg < 0)
2541 return 0;
2542 l = (long)ctx->session_cache_size;
2543 ctx->session_cache_size = (size_t)larg;
2544 return l;
2545 case SSL_CTRL_GET_SESS_CACHE_SIZE:
2546 return (long)ctx->session_cache_size;
2547 case SSL_CTRL_SET_SESS_CACHE_MODE:
2548 l = ctx->session_cache_mode;
2549 ctx->session_cache_mode = larg;
2550 return l;
2551 case SSL_CTRL_GET_SESS_CACHE_MODE:
2552 return ctx->session_cache_mode;
2553
2554 case SSL_CTRL_SESS_NUMBER:
2555 return lh_SSL_SESSION_num_items(ctx->sessions);
2556 case SSL_CTRL_SESS_CONNECT:
2557 return ssl_tsan_load(ctx, &ctx->stats.sess_connect);
2558 case SSL_CTRL_SESS_CONNECT_GOOD:
2559 return ssl_tsan_load(ctx, &ctx->stats.sess_connect_good);
2560 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
2561 return ssl_tsan_load(ctx, &ctx->stats.sess_connect_renegotiate);
2562 case SSL_CTRL_SESS_ACCEPT:
2563 return ssl_tsan_load(ctx, &ctx->stats.sess_accept);
2564 case SSL_CTRL_SESS_ACCEPT_GOOD:
2565 return ssl_tsan_load(ctx, &ctx->stats.sess_accept_good);
2566 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
2567 return ssl_tsan_load(ctx, &ctx->stats.sess_accept_renegotiate);
2568 case SSL_CTRL_SESS_HIT:
2569 return ssl_tsan_load(ctx, &ctx->stats.sess_hit);
2570 case SSL_CTRL_SESS_CB_HIT:
2571 return ssl_tsan_load(ctx, &ctx->stats.sess_cb_hit);
2572 case SSL_CTRL_SESS_MISSES:
2573 return ssl_tsan_load(ctx, &ctx->stats.sess_miss);
2574 case SSL_CTRL_SESS_TIMEOUTS:
2575 return ssl_tsan_load(ctx, &ctx->stats.sess_timeout);
2576 case SSL_CTRL_SESS_CACHE_FULL:
2577 return ssl_tsan_load(ctx, &ctx->stats.sess_cache_full);
2578 case SSL_CTRL_MODE:
2579 return (ctx->mode |= larg);
2580 case SSL_CTRL_CLEAR_MODE:
2581 return (ctx->mode &= ~larg);
2582 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2583 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2584 return 0;
2585 ctx->max_send_fragment = larg;
2586 if (ctx->max_send_fragment < ctx->split_send_fragment)
2587 ctx->split_send_fragment = ctx->max_send_fragment;
2588 return 1;
2589 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2590 if ((size_t)larg > ctx->max_send_fragment || larg == 0)
2591 return 0;
2592 ctx->split_send_fragment = larg;
2593 return 1;
2594 case SSL_CTRL_SET_MAX_PIPELINES:
2595 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2596 return 0;
2597 ctx->max_pipelines = larg;
2598 return 1;
2599 case SSL_CTRL_CERT_FLAGS:
2600 return (ctx->cert->cert_flags |= larg);
2601 case SSL_CTRL_CLEAR_CERT_FLAGS:
2602 return (ctx->cert->cert_flags &= ~larg);
2603 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2604 return ssl_check_allowed_versions(larg, ctx->max_proto_version)
2605 && ssl_set_version_bound(ctx->method->version, (int)larg,
2606 &ctx->min_proto_version);
2607 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2608 return ctx->min_proto_version;
2609 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2610 return ssl_check_allowed_versions(ctx->min_proto_version, larg)
2611 && ssl_set_version_bound(ctx->method->version, (int)larg,
2612 &ctx->max_proto_version);
2613 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2614 return ctx->max_proto_version;
2615 default:
2616 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg);
2617 }
2618 }
2619
SSL_CTX_callback_ctrl(SSL_CTX * ctx,int cmd,void (* fp)(void))2620 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
2621 {
2622 switch (cmd) {
2623 case SSL_CTRL_SET_MSG_CALLBACK:
2624 ctx->msg_callback = (void (*)
2625 (int write_p, int version, int content_type,
2626 const void *buf, size_t len, SSL *ssl,
2627 void *arg))(fp);
2628 return 1;
2629
2630 default:
2631 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp);
2632 }
2633 }
2634
ssl_cipher_id_cmp(const SSL_CIPHER * a,const SSL_CIPHER * b)2635 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
2636 {
2637 if (a->id > b->id)
2638 return 1;
2639 if (a->id < b->id)
2640 return -1;
2641 return 0;
2642 }
2643
ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const * ap,const SSL_CIPHER * const * bp)2644 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
2645 const SSL_CIPHER *const *bp)
2646 {
2647 if ((*ap)->id > (*bp)->id)
2648 return 1;
2649 if ((*ap)->id < (*bp)->id)
2650 return -1;
2651 return 0;
2652 }
2653
2654 /** return a STACK of the ciphers available for the SSL and in order of
2655 * preference */
STACK_OF(SSL_CIPHER)2656 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
2657 {
2658 if (s != NULL) {
2659 if (s->cipher_list != NULL) {
2660 return s->cipher_list;
2661 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
2662 return s->ctx->cipher_list;
2663 }
2664 }
2665 return NULL;
2666 }
2667
STACK_OF(SSL_CIPHER)2668 STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
2669 {
2670 if ((s == NULL) || !s->server)
2671 return NULL;
2672 return s->peer_ciphers;
2673 }
2674
STACK_OF(SSL_CIPHER)2675 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
2676 {
2677 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
2678 int i;
2679
2680 ciphers = SSL_get_ciphers(s);
2681 if (!ciphers)
2682 return NULL;
2683 if (!ssl_set_client_disabled(s))
2684 return NULL;
2685 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
2686 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
2687 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) {
2688 if (!sk)
2689 sk = sk_SSL_CIPHER_new_null();
2690 if (!sk)
2691 return NULL;
2692 if (!sk_SSL_CIPHER_push(sk, c)) {
2693 sk_SSL_CIPHER_free(sk);
2694 return NULL;
2695 }
2696 }
2697 }
2698 return sk;
2699 }
2700
2701 /** return a STACK of the ciphers available for the SSL and in order of
2702 * algorithm id */
STACK_OF(SSL_CIPHER)2703 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
2704 {
2705 if (s != NULL) {
2706 if (s->cipher_list_by_id != NULL) {
2707 return s->cipher_list_by_id;
2708 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
2709 return s->ctx->cipher_list_by_id;
2710 }
2711 }
2712 return NULL;
2713 }
2714
2715 /** The old interface to get the same thing as SSL_get_ciphers() */
SSL_get_cipher_list(const SSL * s,int n)2716 const char *SSL_get_cipher_list(const SSL *s, int n)
2717 {
2718 const SSL_CIPHER *c;
2719 STACK_OF(SSL_CIPHER) *sk;
2720
2721 if (s == NULL)
2722 return NULL;
2723 sk = SSL_get_ciphers(s);
2724 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
2725 return NULL;
2726 c = sk_SSL_CIPHER_value(sk, n);
2727 if (c == NULL)
2728 return NULL;
2729 return c->name;
2730 }
2731
2732 /** return a STACK of the ciphers available for the SSL_CTX and in order of
2733 * preference */
STACK_OF(SSL_CIPHER)2734 STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
2735 {
2736 if (ctx != NULL)
2737 return ctx->cipher_list;
2738 return NULL;
2739 }
2740
2741 /*
2742 * Distinguish between ciphers controlled by set_ciphersuite() and
2743 * set_cipher_list() when counting.
2744 */
cipher_list_tls12_num(STACK_OF (SSL_CIPHER)* sk)2745 static int cipher_list_tls12_num(STACK_OF(SSL_CIPHER) *sk)
2746 {
2747 int i, num = 0;
2748 const SSL_CIPHER *c;
2749
2750 if (sk == NULL)
2751 return 0;
2752 for (i = 0; i < sk_SSL_CIPHER_num(sk); ++i) {
2753 c = sk_SSL_CIPHER_value(sk, i);
2754 if (c->min_tls >= TLS1_3_VERSION)
2755 continue;
2756 num++;
2757 }
2758 return num;
2759 }
2760
2761 /** specify the ciphers to be used by default by the SSL_CTX */
SSL_CTX_set_cipher_list(SSL_CTX * ctx,const char * str)2762 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
2763 {
2764 STACK_OF(SSL_CIPHER) *sk;
2765
2766 sk = ssl_create_cipher_list(ctx, ctx->tls13_ciphersuites,
2767 &ctx->cipher_list, &ctx->cipher_list_by_id, str,
2768 ctx->cert);
2769 /*
2770 * ssl_create_cipher_list may return an empty stack if it was unable to
2771 * find a cipher matching the given rule string (for example if the rule
2772 * string specifies a cipher which has been disabled). This is not an
2773 * error as far as ssl_create_cipher_list is concerned, and hence
2774 * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
2775 */
2776 if (sk == NULL)
2777 return 0;
2778 else if (cipher_list_tls12_num(sk) == 0) {
2779 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH);
2780 return 0;
2781 }
2782 return 1;
2783 }
2784
2785 /** specify the ciphers to be used by the SSL */
SSL_set_cipher_list(SSL * s,const char * str)2786 int SSL_set_cipher_list(SSL *s, const char *str)
2787 {
2788 STACK_OF(SSL_CIPHER) *sk;
2789
2790 sk = ssl_create_cipher_list(s->ctx, s->tls13_ciphersuites,
2791 &s->cipher_list, &s->cipher_list_by_id, str,
2792 s->cert);
2793 /* see comment in SSL_CTX_set_cipher_list */
2794 if (sk == NULL)
2795 return 0;
2796 else if (cipher_list_tls12_num(sk) == 0) {
2797 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH);
2798 return 0;
2799 }
2800 return 1;
2801 }
2802
SSL_get_shared_ciphers(const SSL * s,char * buf,int size)2803 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size)
2804 {
2805 char *p;
2806 STACK_OF(SSL_CIPHER) *clntsk, *srvrsk;
2807 const SSL_CIPHER *c;
2808 int i;
2809
2810 if (!s->server
2811 || s->peer_ciphers == NULL
2812 || size < 2)
2813 return NULL;
2814
2815 p = buf;
2816 clntsk = s->peer_ciphers;
2817 srvrsk = SSL_get_ciphers(s);
2818 if (clntsk == NULL || srvrsk == NULL)
2819 return NULL;
2820
2821 if (sk_SSL_CIPHER_num(clntsk) == 0 || sk_SSL_CIPHER_num(srvrsk) == 0)
2822 return NULL;
2823
2824 for (i = 0; i < sk_SSL_CIPHER_num(clntsk); i++) {
2825 int n;
2826
2827 c = sk_SSL_CIPHER_value(clntsk, i);
2828 if (sk_SSL_CIPHER_find(srvrsk, c) < 0)
2829 continue;
2830
2831 n = OPENSSL_strnlen(c->name, size);
2832 if (n >= size) {
2833 if (p != buf)
2834 --p;
2835 *p = '\0';
2836 return buf;
2837 }
2838 memcpy(p, c->name, n);
2839 p += n;
2840 *(p++) = ':';
2841 size -= n + 1;
2842 }
2843 p[-1] = '\0';
2844 return buf;
2845 }
2846
2847 /**
2848 * Return the requested servername (SNI) value. Note that the behaviour varies
2849 * depending on:
2850 * - whether this is called by the client or the server,
2851 * - if we are before or during/after the handshake,
2852 * - if a resumption or normal handshake is being attempted/has occurred
2853 * - whether we have negotiated TLSv1.2 (or below) or TLSv1.3
2854 *
2855 * Note that only the host_name type is defined (RFC 3546).
2856 */
SSL_get_servername(const SSL * s,const int type)2857 const char *SSL_get_servername(const SSL *s, const int type)
2858 {
2859 /*
2860 * If we don't know if we are the client or the server yet then we assume
2861 * client.
2862 */
2863 int server = s->handshake_func == NULL ? 0 : s->server;
2864 if (type != TLSEXT_NAMETYPE_host_name)
2865 return NULL;
2866
2867 if (server) {
2868 /**
2869 * Server side
2870 * In TLSv1.3 on the server SNI is not associated with the session
2871 * but in TLSv1.2 or below it is.
2872 *
2873 * Before the handshake:
2874 * - return NULL
2875 *
2876 * During/after the handshake (TLSv1.2 or below resumption occurred):
2877 * - If a servername was accepted by the server in the original
2878 * handshake then it will return that servername, or NULL otherwise.
2879 *
2880 * During/after the handshake (TLSv1.2 or below resumption did not occur):
2881 * - The function will return the servername requested by the client in
2882 * this handshake or NULL if none was requested.
2883 */
2884 if (s->hit && !SSL_IS_TLS13(s))
2885 return s->session->ext.hostname;
2886 } else {
2887 /**
2888 * Client side
2889 *
2890 * Before the handshake:
2891 * - If a servername has been set via a call to
2892 * SSL_set_tlsext_host_name() then it will return that servername
2893 * - If one has not been set, but a TLSv1.2 resumption is being
2894 * attempted and the session from the original handshake had a
2895 * servername accepted by the server then it will return that
2896 * servername
2897 * - Otherwise it returns NULL
2898 *
2899 * During/after the handshake (TLSv1.2 or below resumption occurred):
2900 * - If the session from the original handshake had a servername accepted
2901 * by the server then it will return that servername.
2902 * - Otherwise it returns the servername set via
2903 * SSL_set_tlsext_host_name() (or NULL if it was not called).
2904 *
2905 * During/after the handshake (TLSv1.2 or below resumption did not occur):
2906 * - It will return the servername set via SSL_set_tlsext_host_name()
2907 * (or NULL if it was not called).
2908 */
2909 if (SSL_in_before(s)) {
2910 if (s->ext.hostname == NULL
2911 && s->session != NULL
2912 && s->session->ssl_version != TLS1_3_VERSION)
2913 return s->session->ext.hostname;
2914 } else {
2915 if (!SSL_IS_TLS13(s) && s->hit && s->session->ext.hostname != NULL)
2916 return s->session->ext.hostname;
2917 }
2918 }
2919
2920 return s->ext.hostname;
2921 }
2922
SSL_get_servername_type(const SSL * s)2923 int SSL_get_servername_type(const SSL *s)
2924 {
2925 if (SSL_get_servername(s, TLSEXT_NAMETYPE_host_name) != NULL)
2926 return TLSEXT_NAMETYPE_host_name;
2927 return -1;
2928 }
2929
2930 /*
2931 * SSL_select_next_proto implements the standard protocol selection. It is
2932 * expected that this function is called from the callback set by
2933 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
2934 * vector of 8-bit, length prefixed byte strings. The length byte itself is
2935 * not included in the length. A byte string of length 0 is invalid. No byte
2936 * string may be truncated. The current, but experimental algorithm for
2937 * selecting the protocol is: 1) If the server doesn't support NPN then this
2938 * is indicated to the callback. In this case, the client application has to
2939 * abort the connection or have a default application level protocol. 2) If
2940 * the server supports NPN, but advertises an empty list then the client
2941 * selects the first protocol in its list, but indicates via the API that this
2942 * fallback case was enacted. 3) Otherwise, the client finds the first
2943 * protocol in the server's list that it supports and selects this protocol.
2944 * This is because it's assumed that the server has better information about
2945 * which protocol a client should use. 4) If the client doesn't support any
2946 * of the server's advertised protocols, then this is treated the same as
2947 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
2948 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
2949 */
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)2950 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
2951 const unsigned char *server,
2952 unsigned int server_len,
2953 const unsigned char *client, unsigned int client_len)
2954 {
2955 unsigned int i, j;
2956 const unsigned char *result;
2957 int status = OPENSSL_NPN_UNSUPPORTED;
2958
2959 /*
2960 * For each protocol in server preference order, see if we support it.
2961 */
2962 for (i = 0; i < server_len;) {
2963 for (j = 0; j < client_len;) {
2964 if (server[i] == client[j] &&
2965 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
2966 /* We found a match */
2967 result = &server[i];
2968 status = OPENSSL_NPN_NEGOTIATED;
2969 goto found;
2970 }
2971 j += client[j];
2972 j++;
2973 }
2974 i += server[i];
2975 i++;
2976 }
2977
2978 /* There's no overlap between our protocols and the server's list. */
2979 result = client;
2980 status = OPENSSL_NPN_NO_OVERLAP;
2981
2982 found:
2983 *out = (unsigned char *)result + 1;
2984 *outlen = result[0];
2985 return status;
2986 }
2987
2988 #ifndef OPENSSL_NO_NEXTPROTONEG
2989 /*
2990 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
2991 * client's requested protocol for this connection and returns 0. If the
2992 * client didn't request any protocol, then *data is set to NULL. Note that
2993 * the client can request any protocol it chooses. The value returned from
2994 * this function need not be a member of the list of supported protocols
2995 * provided by the callback.
2996 */
SSL_get0_next_proto_negotiated(const SSL * s,const unsigned char ** data,unsigned * len)2997 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
2998 unsigned *len)
2999 {
3000 *data = s->ext.npn;
3001 if (*data == NULL) {
3002 *len = 0;
3003 } else {
3004 *len = (unsigned int)s->ext.npn_len;
3005 }
3006 }
3007
3008 /*
3009 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
3010 * a TLS server needs a list of supported protocols for Next Protocol
3011 * Negotiation. The returned list must be in wire format. The list is
3012 * returned by setting |out| to point to it and |outlen| to its length. This
3013 * memory will not be modified, but one should assume that the SSL* keeps a
3014 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
3015 * wishes to advertise. Otherwise, no such extension will be included in the
3016 * ServerHello.
3017 */
SSL_CTX_set_npn_advertised_cb(SSL_CTX * ctx,SSL_CTX_npn_advertised_cb_func cb,void * arg)3018 void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
3019 SSL_CTX_npn_advertised_cb_func cb,
3020 void *arg)
3021 {
3022 ctx->ext.npn_advertised_cb = cb;
3023 ctx->ext.npn_advertised_cb_arg = arg;
3024 }
3025
3026 /*
3027 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
3028 * client needs to select a protocol from the server's provided list. |out|
3029 * must be set to point to the selected protocol (which may be within |in|).
3030 * The length of the protocol name must be written into |outlen|. The
3031 * server's advertised protocols are provided in |in| and |inlen|. The
3032 * callback can assume that |in| is syntactically valid. The client must
3033 * select a protocol. It is fatal to the connection if this callback returns
3034 * a value other than SSL_TLSEXT_ERR_OK.
3035 */
SSL_CTX_set_npn_select_cb(SSL_CTX * ctx,SSL_CTX_npn_select_cb_func cb,void * arg)3036 void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
3037 SSL_CTX_npn_select_cb_func cb,
3038 void *arg)
3039 {
3040 ctx->ext.npn_select_cb = cb;
3041 ctx->ext.npn_select_cb_arg = arg;
3042 }
3043 #endif
3044
alpn_value_ok(const unsigned char * protos,unsigned int protos_len)3045 static int alpn_value_ok(const unsigned char *protos, unsigned int protos_len)
3046 {
3047 unsigned int idx;
3048
3049 if (protos_len < 2 || protos == NULL)
3050 return 0;
3051
3052 for (idx = 0; idx < protos_len; idx += protos[idx] + 1) {
3053 if (protos[idx] == 0)
3054 return 0;
3055 }
3056 return idx == protos_len;
3057 }
3058 /*
3059 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
3060 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
3061 * length-prefixed strings). Returns 0 on success.
3062 */
SSL_CTX_set_alpn_protos(SSL_CTX * ctx,const unsigned char * protos,unsigned int protos_len)3063 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
3064 unsigned int protos_len)
3065 {
3066 unsigned char *alpn;
3067
3068 if (protos_len == 0 || protos == NULL) {
3069 OPENSSL_free(ctx->ext.alpn);
3070 ctx->ext.alpn = NULL;
3071 ctx->ext.alpn_len = 0;
3072 return 0;
3073 }
3074 /* Not valid per RFC */
3075 if (!alpn_value_ok(protos, protos_len))
3076 return 1;
3077
3078 alpn = OPENSSL_memdup(protos, protos_len);
3079 if (alpn == NULL) {
3080 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3081 return 1;
3082 }
3083 OPENSSL_free(ctx->ext.alpn);
3084 ctx->ext.alpn = alpn;
3085 ctx->ext.alpn_len = protos_len;
3086
3087 return 0;
3088 }
3089
3090 /*
3091 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
3092 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
3093 * length-prefixed strings). Returns 0 on success.
3094 */
SSL_set_alpn_protos(SSL * ssl,const unsigned char * protos,unsigned int protos_len)3095 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
3096 unsigned int protos_len)
3097 {
3098 unsigned char *alpn;
3099
3100 if (protos_len == 0 || protos == NULL) {
3101 OPENSSL_free(ssl->ext.alpn);
3102 ssl->ext.alpn = NULL;
3103 ssl->ext.alpn_len = 0;
3104 return 0;
3105 }
3106 /* Not valid per RFC */
3107 if (!alpn_value_ok(protos, protos_len))
3108 return 1;
3109
3110 alpn = OPENSSL_memdup(protos, protos_len);
3111 if (alpn == NULL) {
3112 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3113 return 1;
3114 }
3115 OPENSSL_free(ssl->ext.alpn);
3116 ssl->ext.alpn = alpn;
3117 ssl->ext.alpn_len = protos_len;
3118
3119 return 0;
3120 }
3121
3122 /*
3123 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
3124 * called during ClientHello processing in order to select an ALPN protocol
3125 * from the client's list of offered protocols.
3126 */
SSL_CTX_set_alpn_select_cb(SSL_CTX * ctx,SSL_CTX_alpn_select_cb_func cb,void * arg)3127 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
3128 SSL_CTX_alpn_select_cb_func cb,
3129 void *arg)
3130 {
3131 ctx->ext.alpn_select_cb = cb;
3132 ctx->ext.alpn_select_cb_arg = arg;
3133 }
3134
3135 /*
3136 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
3137 * On return it sets |*data| to point to |*len| bytes of protocol name
3138 * (not including the leading length-prefix byte). If the server didn't
3139 * respond with a negotiated protocol then |*len| will be zero.
3140 */
SSL_get0_alpn_selected(const SSL * ssl,const unsigned char ** data,unsigned int * len)3141 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
3142 unsigned int *len)
3143 {
3144 *data = ssl->s3.alpn_selected;
3145 if (*data == NULL)
3146 *len = 0;
3147 else
3148 *len = (unsigned int)ssl->s3.alpn_selected_len;
3149 }
3150
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)3151 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
3152 const char *label, size_t llen,
3153 const unsigned char *context, size_t contextlen,
3154 int use_context)
3155 {
3156 if (s->session == NULL
3157 || (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER))
3158 return -1;
3159
3160 return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
3161 llen, context,
3162 contextlen, use_context);
3163 }
3164
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)3165 int SSL_export_keying_material_early(SSL *s, unsigned char *out, size_t olen,
3166 const char *label, size_t llen,
3167 const unsigned char *context,
3168 size_t contextlen)
3169 {
3170 if (s->version != TLS1_3_VERSION)
3171 return 0;
3172
3173 return tls13_export_keying_material_early(s, out, olen, label, llen,
3174 context, contextlen);
3175 }
3176
ssl_session_hash(const SSL_SESSION * a)3177 static unsigned long ssl_session_hash(const SSL_SESSION *a)
3178 {
3179 const unsigned char *session_id = a->session_id;
3180 unsigned long l;
3181 unsigned char tmp_storage[4];
3182
3183 if (a->session_id_length < sizeof(tmp_storage)) {
3184 memset(tmp_storage, 0, sizeof(tmp_storage));
3185 memcpy(tmp_storage, a->session_id, a->session_id_length);
3186 session_id = tmp_storage;
3187 }
3188
3189 l = (unsigned long)
3190 ((unsigned long)session_id[0]) |
3191 ((unsigned long)session_id[1] << 8L) |
3192 ((unsigned long)session_id[2] << 16L) |
3193 ((unsigned long)session_id[3] << 24L);
3194 return l;
3195 }
3196
3197 /*
3198 * NB: If this function (or indeed the hash function which uses a sort of
3199 * coarser function than this one) is changed, ensure
3200 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
3201 * being able to construct an SSL_SESSION that will collide with any existing
3202 * session with a matching session ID.
3203 */
ssl_session_cmp(const SSL_SESSION * a,const SSL_SESSION * b)3204 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
3205 {
3206 if (a->ssl_version != b->ssl_version)
3207 return 1;
3208 if (a->session_id_length != b->session_id_length)
3209 return 1;
3210 return memcmp(a->session_id, b->session_id, a->session_id_length);
3211 }
3212
3213 /*
3214 * These wrapper functions should remain rather than redeclaring
3215 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
3216 * variable. The reason is that the functions aren't static, they're exposed
3217 * via ssl.h.
3218 */
3219
SSL_CTX_new_ex(OSSL_LIB_CTX * libctx,const char * propq,const SSL_METHOD * meth)3220 SSL_CTX *SSL_CTX_new_ex(OSSL_LIB_CTX *libctx, const char *propq,
3221 const SSL_METHOD *meth)
3222 {
3223 SSL_CTX *ret = NULL;
3224
3225 if (meth == NULL) {
3226 ERR_raise(ERR_LIB_SSL, SSL_R_NULL_SSL_METHOD_PASSED);
3227 return NULL;
3228 }
3229
3230 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
3231 return NULL;
3232
3233 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
3234 ERR_raise(ERR_LIB_SSL, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
3235 goto err;
3236 }
3237 ret = OPENSSL_zalloc(sizeof(*ret));
3238 if (ret == NULL)
3239 goto err;
3240
3241 /* Init the reference counting before any call to SSL_CTX_free */
3242 ret->references = 1;
3243 ret->lock = CRYPTO_THREAD_lock_new();
3244 if (ret->lock == NULL) {
3245 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3246 OPENSSL_free(ret);
3247 return NULL;
3248 }
3249
3250 #ifdef TSAN_REQUIRES_LOCKING
3251 ret->tsan_lock = CRYPTO_THREAD_lock_new();
3252 if (ret->tsan_lock == NULL) {
3253 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3254 goto err;
3255 }
3256 #endif
3257
3258 ret->libctx = libctx;
3259 if (propq != NULL) {
3260 ret->propq = OPENSSL_strdup(propq);
3261 if (ret->propq == NULL)
3262 goto err;
3263 }
3264
3265 ret->method = meth;
3266 ret->min_proto_version = 0;
3267 ret->max_proto_version = 0;
3268 ret->mode = SSL_MODE_AUTO_RETRY;
3269 ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
3270 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
3271 /* We take the system default. */
3272 ret->session_timeout = meth->get_timeout();
3273 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
3274 ret->verify_mode = SSL_VERIFY_NONE;
3275 if ((ret->cert = ssl_cert_new()) == NULL)
3276 goto err;
3277
3278 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
3279 if (ret->sessions == NULL)
3280 goto err;
3281 ret->cert_store = X509_STORE_new();
3282 if (ret->cert_store == NULL)
3283 goto err;
3284 #ifndef OPENSSL_NO_CT
3285 ret->ctlog_store = CTLOG_STORE_new_ex(libctx, propq);
3286 if (ret->ctlog_store == NULL)
3287 goto err;
3288 #endif
3289
3290 /* initialize cipher/digest methods table */
3291 if (!ssl_load_ciphers(ret))
3292 goto err2;
3293 /* initialise sig algs */
3294 if (!ssl_setup_sig_algs(ret))
3295 goto err2;
3296
3297
3298 if (!ssl_load_groups(ret))
3299 goto err2;
3300
3301 if (!SSL_CTX_set_ciphersuites(ret, OSSL_default_ciphersuites()))
3302 goto err;
3303
3304 if (!ssl_create_cipher_list(ret,
3305 ret->tls13_ciphersuites,
3306 &ret->cipher_list, &ret->cipher_list_by_id,
3307 OSSL_default_cipher_list(), ret->cert)
3308 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
3309 ERR_raise(ERR_LIB_SSL, SSL_R_LIBRARY_HAS_NO_CIPHERS);
3310 goto err2;
3311 }
3312
3313 ret->param = X509_VERIFY_PARAM_new();
3314 if (ret->param == NULL)
3315 goto err;
3316
3317 /*
3318 * If these aren't available from the provider we'll get NULL returns.
3319 * That's fine but will cause errors later if SSLv3 is negotiated
3320 */
3321 ret->md5 = ssl_evp_md_fetch(libctx, NID_md5, propq);
3322 ret->sha1 = ssl_evp_md_fetch(libctx, NID_sha1, propq);
3323
3324 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL)
3325 goto err;
3326
3327 if ((ret->client_ca_names = sk_X509_NAME_new_null()) == NULL)
3328 goto err;
3329
3330 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
3331 goto err;
3332
3333 if ((ret->ext.secure = OPENSSL_secure_zalloc(sizeof(*ret->ext.secure))) == NULL)
3334 goto err;
3335
3336 /* No compression for DTLS */
3337 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
3338 ret->comp_methods = SSL_COMP_get_compression_methods();
3339
3340 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3341 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3342
3343 /* Setup RFC5077 ticket keys */
3344 if ((RAND_bytes_ex(libctx, ret->ext.tick_key_name,
3345 sizeof(ret->ext.tick_key_name), 0) <= 0)
3346 || (RAND_priv_bytes_ex(libctx, ret->ext.secure->tick_hmac_key,
3347 sizeof(ret->ext.secure->tick_hmac_key), 0) <= 0)
3348 || (RAND_priv_bytes_ex(libctx, ret->ext.secure->tick_aes_key,
3349 sizeof(ret->ext.secure->tick_aes_key), 0) <= 0))
3350 ret->options |= SSL_OP_NO_TICKET;
3351
3352 if (RAND_priv_bytes_ex(libctx, ret->ext.cookie_hmac_key,
3353 sizeof(ret->ext.cookie_hmac_key), 0) <= 0)
3354 goto err;
3355
3356 #ifndef OPENSSL_NO_SRP
3357 if (!ssl_ctx_srp_ctx_init_intern(ret))
3358 goto err;
3359 #endif
3360 #ifndef OPENSSL_NO_ENGINE
3361 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
3362 # define eng_strx(x) #x
3363 # define eng_str(x) eng_strx(x)
3364 /* Use specific client engine automatically... ignore errors */
3365 {
3366 ENGINE *eng;
3367 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3368 if (!eng) {
3369 ERR_clear_error();
3370 ENGINE_load_builtin_engines();
3371 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3372 }
3373 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
3374 ERR_clear_error();
3375 }
3376 # endif
3377 #endif
3378 /*
3379 * Disable compression by default to prevent CRIME. Applications can
3380 * re-enable compression by configuring
3381 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
3382 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3
3383 * middlebox compatibility by default. This may be disabled by default in
3384 * a later OpenSSL version.
3385 */
3386 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT;
3387
3388 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
3389
3390 /*
3391 * We cannot usefully set a default max_early_data here (which gets
3392 * propagated in SSL_new(), for the following reason: setting the
3393 * SSL field causes tls_construct_stoc_early_data() to tell the
3394 * client that early data will be accepted when constructing a TLS 1.3
3395 * session ticket, and the client will accordingly send us early data
3396 * when using that ticket (if the client has early data to send).
3397 * However, in order for the early data to actually be consumed by
3398 * the application, the application must also have calls to
3399 * SSL_read_early_data(); otherwise we'll just skip past the early data
3400 * and ignore it. So, since the application must add calls to
3401 * SSL_read_early_data(), we also require them to add
3402 * calls to SSL_CTX_set_max_early_data() in order to use early data,
3403 * eliminating the bandwidth-wasting early data in the case described
3404 * above.
3405 */
3406 ret->max_early_data = 0;
3407
3408 /*
3409 * Default recv_max_early_data is a fully loaded single record. Could be
3410 * split across multiple records in practice. We set this differently to
3411 * max_early_data so that, in the default case, we do not advertise any
3412 * support for early_data, but if a client were to send us some (e.g.
3413 * because of an old, stale ticket) then we will tolerate it and skip over
3414 * it.
3415 */
3416 ret->recv_max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
3417
3418 /* By default we send two session tickets automatically in TLSv1.3 */
3419 ret->num_tickets = 2;
3420
3421 ssl_ctx_system_config(ret);
3422
3423 return ret;
3424 err:
3425 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
3426 err2:
3427 SSL_CTX_free(ret);
3428 return NULL;
3429 }
3430
SSL_CTX_new(const SSL_METHOD * meth)3431 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
3432 {
3433 return SSL_CTX_new_ex(NULL, NULL, meth);
3434 }
3435
SSL_CTX_up_ref(SSL_CTX * ctx)3436 int SSL_CTX_up_ref(SSL_CTX *ctx)
3437 {
3438 int i;
3439
3440 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
3441 return 0;
3442
3443 REF_PRINT_COUNT("SSL_CTX", ctx);
3444 REF_ASSERT_ISNT(i < 2);
3445 return ((i > 1) ? 1 : 0);
3446 }
3447
SSL_CTX_free(SSL_CTX * a)3448 void SSL_CTX_free(SSL_CTX *a)
3449 {
3450 int i;
3451 size_t j;
3452
3453 if (a == NULL)
3454 return;
3455
3456 CRYPTO_DOWN_REF(&a->references, &i, a->lock);
3457 REF_PRINT_COUNT("SSL_CTX", a);
3458 if (i > 0)
3459 return;
3460 REF_ASSERT_ISNT(i < 0);
3461
3462 X509_VERIFY_PARAM_free(a->param);
3463 dane_ctx_final(&a->dane);
3464
3465 /*
3466 * Free internal session cache. However: the remove_cb() may reference
3467 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
3468 * after the sessions were flushed.
3469 * As the ex_data handling routines might also touch the session cache,
3470 * the most secure solution seems to be: empty (flush) the cache, then
3471 * free ex_data, then finally free the cache.
3472 * (See ticket [openssl.org #212].)
3473 */
3474 if (a->sessions != NULL)
3475 SSL_CTX_flush_sessions(a, 0);
3476
3477 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
3478 lh_SSL_SESSION_free(a->sessions);
3479 X509_STORE_free(a->cert_store);
3480 #ifndef OPENSSL_NO_CT
3481 CTLOG_STORE_free(a->ctlog_store);
3482 #endif
3483 sk_SSL_CIPHER_free(a->cipher_list);
3484 sk_SSL_CIPHER_free(a->cipher_list_by_id);
3485 sk_SSL_CIPHER_free(a->tls13_ciphersuites);
3486 ssl_cert_free(a->cert);
3487 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free);
3488 sk_X509_NAME_pop_free(a->client_ca_names, X509_NAME_free);
3489 sk_X509_pop_free(a->extra_certs, X509_free);
3490 a->comp_methods = NULL;
3491 #ifndef OPENSSL_NO_SRTP
3492 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
3493 #endif
3494 #ifndef OPENSSL_NO_SRP
3495 ssl_ctx_srp_ctx_free_intern(a);
3496 #endif
3497 #ifndef OPENSSL_NO_ENGINE
3498 tls_engine_finish(a->client_cert_engine);
3499 #endif
3500
3501 OPENSSL_free(a->ext.ecpointformats);
3502 OPENSSL_free(a->ext.supportedgroups);
3503 OPENSSL_free(a->ext.supported_groups_default);
3504 OPENSSL_free(a->ext.alpn);
3505 OPENSSL_secure_free(a->ext.secure);
3506
3507 ssl_evp_md_free(a->md5);
3508 ssl_evp_md_free(a->sha1);
3509
3510 for (j = 0; j < SSL_ENC_NUM_IDX; j++)
3511 ssl_evp_cipher_free(a->ssl_cipher_methods[j]);
3512 for (j = 0; j < SSL_MD_NUM_IDX; j++)
3513 ssl_evp_md_free(a->ssl_digest_methods[j]);
3514 for (j = 0; j < a->group_list_len; j++) {
3515 OPENSSL_free(a->group_list[j].tlsname);
3516 OPENSSL_free(a->group_list[j].realname);
3517 OPENSSL_free(a->group_list[j].algorithm);
3518 }
3519 OPENSSL_free(a->group_list);
3520
3521 OPENSSL_free(a->sigalg_lookup_cache);
3522
3523 CRYPTO_THREAD_lock_free(a->lock);
3524 #ifdef TSAN_REQUIRES_LOCKING
3525 CRYPTO_THREAD_lock_free(a->tsan_lock);
3526 #endif
3527
3528 OPENSSL_free(a->propq);
3529
3530 OPENSSL_free(a);
3531 }
3532
SSL_CTX_set_default_passwd_cb(SSL_CTX * ctx,pem_password_cb * cb)3533 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
3534 {
3535 ctx->default_passwd_callback = cb;
3536 }
3537
SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX * ctx,void * u)3538 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
3539 {
3540 ctx->default_passwd_callback_userdata = u;
3541 }
3542
SSL_CTX_get_default_passwd_cb(SSL_CTX * ctx)3543 pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
3544 {
3545 return ctx->default_passwd_callback;
3546 }
3547
SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX * ctx)3548 void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
3549 {
3550 return ctx->default_passwd_callback_userdata;
3551 }
3552
SSL_set_default_passwd_cb(SSL * s,pem_password_cb * cb)3553 void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
3554 {
3555 s->default_passwd_callback = cb;
3556 }
3557
SSL_set_default_passwd_cb_userdata(SSL * s,void * u)3558 void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
3559 {
3560 s->default_passwd_callback_userdata = u;
3561 }
3562
SSL_get_default_passwd_cb(SSL * s)3563 pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
3564 {
3565 return s->default_passwd_callback;
3566 }
3567
SSL_get_default_passwd_cb_userdata(SSL * s)3568 void *SSL_get_default_passwd_cb_userdata(SSL *s)
3569 {
3570 return s->default_passwd_callback_userdata;
3571 }
3572
SSL_CTX_set_cert_verify_callback(SSL_CTX * ctx,int (* cb)(X509_STORE_CTX *,void *),void * arg)3573 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
3574 int (*cb) (X509_STORE_CTX *, void *),
3575 void *arg)
3576 {
3577 ctx->app_verify_callback = cb;
3578 ctx->app_verify_arg = arg;
3579 }
3580
SSL_CTX_set_verify(SSL_CTX * ctx,int mode,int (* cb)(int,X509_STORE_CTX *))3581 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
3582 int (*cb) (int, X509_STORE_CTX *))
3583 {
3584 ctx->verify_mode = mode;
3585 ctx->default_verify_callback = cb;
3586 }
3587
SSL_CTX_set_verify_depth(SSL_CTX * ctx,int depth)3588 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
3589 {
3590 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
3591 }
3592
SSL_CTX_set_cert_cb(SSL_CTX * c,int (* cb)(SSL * ssl,void * arg),void * arg)3593 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
3594 {
3595 ssl_cert_set_cert_cb(c->cert, cb, arg);
3596 }
3597
SSL_set_cert_cb(SSL * s,int (* cb)(SSL * ssl,void * arg),void * arg)3598 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
3599 {
3600 ssl_cert_set_cert_cb(s->cert, cb, arg);
3601 }
3602
ssl_set_masks(SSL * s)3603 void ssl_set_masks(SSL *s)
3604 {
3605 CERT *c = s->cert;
3606 uint32_t *pvalid = s->s3.tmp.valid_flags;
3607 int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
3608 unsigned long mask_k, mask_a;
3609 int have_ecc_cert, ecdsa_ok;
3610
3611 if (c == NULL)
3612 return;
3613
3614 dh_tmp = (c->dh_tmp != NULL
3615 || c->dh_tmp_cb != NULL
3616 || c->dh_tmp_auto);
3617
3618 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3619 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3620 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
3621 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
3622 mask_k = 0;
3623 mask_a = 0;
3624
3625 OSSL_TRACE4(TLS_CIPHER, "dh_tmp=%d rsa_enc=%d rsa_sign=%d dsa_sign=%d\n",
3626 dh_tmp, rsa_enc, rsa_sign, dsa_sign);
3627
3628 #ifndef OPENSSL_NO_GOST
3629 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
3630 mask_k |= SSL_kGOST | SSL_kGOST18;
3631 mask_a |= SSL_aGOST12;
3632 }
3633 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
3634 mask_k |= SSL_kGOST | SSL_kGOST18;
3635 mask_a |= SSL_aGOST12;
3636 }
3637 if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
3638 mask_k |= SSL_kGOST;
3639 mask_a |= SSL_aGOST01;
3640 }
3641 #endif
3642
3643 if (rsa_enc)
3644 mask_k |= SSL_kRSA;
3645
3646 if (dh_tmp)
3647 mask_k |= SSL_kDHE;
3648
3649 /*
3650 * If we only have an RSA-PSS certificate allow RSA authentication
3651 * if TLS 1.2 and peer supports it.
3652 */
3653
3654 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN)
3655 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN
3656 && TLS1_get_version(s) == TLS1_2_VERSION))
3657 mask_a |= SSL_aRSA;
3658
3659 if (dsa_sign) {
3660 mask_a |= SSL_aDSS;
3661 }
3662
3663 mask_a |= SSL_aNULL;
3664
3665 /*
3666 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
3667 * depending on the key usage extension.
3668 */
3669 if (have_ecc_cert) {
3670 uint32_t ex_kusage;
3671 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
3672 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
3673 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
3674 ecdsa_ok = 0;
3675 if (ecdsa_ok)
3676 mask_a |= SSL_aECDSA;
3677 }
3678 /* Allow Ed25519 for TLS 1.2 if peer supports it */
3679 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519)
3680 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
3681 && TLS1_get_version(s) == TLS1_2_VERSION)
3682 mask_a |= SSL_aECDSA;
3683
3684 /* Allow Ed448 for TLS 1.2 if peer supports it */
3685 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448)
3686 && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN
3687 && TLS1_get_version(s) == TLS1_2_VERSION)
3688 mask_a |= SSL_aECDSA;
3689
3690 mask_k |= SSL_kECDHE;
3691
3692 #ifndef OPENSSL_NO_PSK
3693 mask_k |= SSL_kPSK;
3694 mask_a |= SSL_aPSK;
3695 if (mask_k & SSL_kRSA)
3696 mask_k |= SSL_kRSAPSK;
3697 if (mask_k & SSL_kDHE)
3698 mask_k |= SSL_kDHEPSK;
3699 if (mask_k & SSL_kECDHE)
3700 mask_k |= SSL_kECDHEPSK;
3701 #endif
3702
3703 s->s3.tmp.mask_k = mask_k;
3704 s->s3.tmp.mask_a = mask_a;
3705 }
3706
ssl_check_srvr_ecc_cert_and_alg(X509 * x,SSL * s)3707 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
3708 {
3709 if (s->s3.tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
3710 /* key usage, if present, must allow signing */
3711 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
3712 ERR_raise(ERR_LIB_SSL, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
3713 return 0;
3714 }
3715 }
3716 return 1; /* all checks are ok */
3717 }
3718
ssl_get_server_cert_serverinfo(SSL * s,const unsigned char ** serverinfo,size_t * serverinfo_length)3719 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
3720 size_t *serverinfo_length)
3721 {
3722 CERT_PKEY *cpk = s->s3.tmp.cert;
3723 *serverinfo_length = 0;
3724
3725 if (cpk == NULL || cpk->serverinfo == NULL)
3726 return 0;
3727
3728 *serverinfo = cpk->serverinfo;
3729 *serverinfo_length = cpk->serverinfo_length;
3730 return 1;
3731 }
3732
ssl_update_cache(SSL * s,int mode)3733 void ssl_update_cache(SSL *s, int mode)
3734 {
3735 int i;
3736
3737 /*
3738 * If the session_id_length is 0, we are not supposed to cache it, and it
3739 * would be rather hard to do anyway :-). Also if the session has already
3740 * been marked as not_resumable we should not cache it for later reuse.
3741 */
3742 if (s->session->session_id_length == 0 || s->session->not_resumable)
3743 return;
3744
3745 /*
3746 * If sid_ctx_length is 0 there is no specific application context
3747 * associated with this session, so when we try to resume it and
3748 * SSL_VERIFY_PEER is requested to verify the client identity, we have no
3749 * indication that this is actually a session for the proper application
3750 * context, and the *handshake* will fail, not just the resumption attempt.
3751 * Do not cache (on the server) these sessions that are not resumable
3752 * (clients can set SSL_VERIFY_PEER without needing a sid_ctx set).
3753 */
3754 if (s->server && s->session->sid_ctx_length == 0
3755 && (s->verify_mode & SSL_VERIFY_PEER) != 0)
3756 return;
3757
3758 i = s->session_ctx->session_cache_mode;
3759 if ((i & mode) != 0
3760 && (!s->hit || SSL_IS_TLS13(s))) {
3761 /*
3762 * Add the session to the internal cache. In server side TLSv1.3 we
3763 * normally don't do this because by default it's a full stateless ticket
3764 * with only a dummy session id so there is no reason to cache it,
3765 * unless:
3766 * - we are doing early_data, in which case we cache so that we can
3767 * detect replays
3768 * - the application has set a remove_session_cb so needs to know about
3769 * session timeout events
3770 * - SSL_OP_NO_TICKET is set in which case it is a stateful ticket
3771 */
3772 if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0
3773 && (!SSL_IS_TLS13(s)
3774 || !s->server
3775 || (s->max_early_data > 0
3776 && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)
3777 || s->session_ctx->remove_session_cb != NULL
3778 || (s->options & SSL_OP_NO_TICKET) != 0))
3779 SSL_CTX_add_session(s->session_ctx, s->session);
3780
3781 /*
3782 * Add the session to the external cache. We do this even in server side
3783 * TLSv1.3 without early data because some applications just want to
3784 * know about the creation of a session and aren't doing a full cache.
3785 */
3786 if (s->session_ctx->new_session_cb != NULL) {
3787 SSL_SESSION_up_ref(s->session);
3788 if (!s->session_ctx->new_session_cb(s, s->session))
3789 SSL_SESSION_free(s->session);
3790 }
3791 }
3792
3793 /* auto flush every 255 connections */
3794 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
3795 TSAN_QUALIFIER int *stat;
3796
3797 if (mode & SSL_SESS_CACHE_CLIENT)
3798 stat = &s->session_ctx->stats.sess_connect_good;
3799 else
3800 stat = &s->session_ctx->stats.sess_accept_good;
3801 if ((ssl_tsan_load(s->session_ctx, stat) & 0xff) == 0xff)
3802 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
3803 }
3804 }
3805
SSL_CTX_get_ssl_method(const SSL_CTX * ctx)3806 const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx)
3807 {
3808 return ctx->method;
3809 }
3810
SSL_get_ssl_method(const SSL * s)3811 const SSL_METHOD *SSL_get_ssl_method(const SSL *s)
3812 {
3813 return s->method;
3814 }
3815
SSL_set_ssl_method(SSL * s,const SSL_METHOD * meth)3816 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
3817 {
3818 int ret = 1;
3819
3820 if (s->method != meth) {
3821 const SSL_METHOD *sm = s->method;
3822 int (*hf) (SSL *) = s->handshake_func;
3823
3824 if (sm->version == meth->version)
3825 s->method = meth;
3826 else {
3827 sm->ssl_free(s);
3828 s->method = meth;
3829 ret = s->method->ssl_new(s);
3830 }
3831
3832 if (hf == sm->ssl_connect)
3833 s->handshake_func = meth->ssl_connect;
3834 else if (hf == sm->ssl_accept)
3835 s->handshake_func = meth->ssl_accept;
3836 }
3837 return ret;
3838 }
3839
SSL_get_error(const SSL * s,int i)3840 int SSL_get_error(const SSL *s, int i)
3841 {
3842 int reason;
3843 unsigned long l;
3844 BIO *bio;
3845
3846 if (i > 0)
3847 return SSL_ERROR_NONE;
3848
3849 /*
3850 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
3851 * where we do encode the error
3852 */
3853 if ((l = ERR_peek_error()) != 0) {
3854 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
3855 return SSL_ERROR_SYSCALL;
3856 else
3857 return SSL_ERROR_SSL;
3858 }
3859
3860 if (SSL_want_read(s)) {
3861 bio = SSL_get_rbio(s);
3862 if (BIO_should_read(bio))
3863 return SSL_ERROR_WANT_READ;
3864 else if (BIO_should_write(bio))
3865 /*
3866 * This one doesn't make too much sense ... We never try to write
3867 * to the rbio, and an application program where rbio and wbio
3868 * are separate couldn't even know what it should wait for.
3869 * However if we ever set s->rwstate incorrectly (so that we have
3870 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
3871 * wbio *are* the same, this test works around that bug; so it
3872 * might be safer to keep it.
3873 */
3874 return SSL_ERROR_WANT_WRITE;
3875 else if (BIO_should_io_special(bio)) {
3876 reason = BIO_get_retry_reason(bio);
3877 if (reason == BIO_RR_CONNECT)
3878 return SSL_ERROR_WANT_CONNECT;
3879 else if (reason == BIO_RR_ACCEPT)
3880 return SSL_ERROR_WANT_ACCEPT;
3881 else
3882 return SSL_ERROR_SYSCALL; /* unknown */
3883 }
3884 }
3885
3886 if (SSL_want_write(s)) {
3887 /* Access wbio directly - in order to use the buffered bio if present */
3888 bio = s->wbio;
3889 if (BIO_should_write(bio))
3890 return SSL_ERROR_WANT_WRITE;
3891 else if (BIO_should_read(bio))
3892 /*
3893 * See above (SSL_want_read(s) with BIO_should_write(bio))
3894 */
3895 return SSL_ERROR_WANT_READ;
3896 else if (BIO_should_io_special(bio)) {
3897 reason = BIO_get_retry_reason(bio);
3898 if (reason == BIO_RR_CONNECT)
3899 return SSL_ERROR_WANT_CONNECT;
3900 else if (reason == BIO_RR_ACCEPT)
3901 return SSL_ERROR_WANT_ACCEPT;
3902 else
3903 return SSL_ERROR_SYSCALL;
3904 }
3905 }
3906 if (SSL_want_x509_lookup(s))
3907 return SSL_ERROR_WANT_X509_LOOKUP;
3908 if (SSL_want_retry_verify(s))
3909 return SSL_ERROR_WANT_RETRY_VERIFY;
3910 if (SSL_want_async(s))
3911 return SSL_ERROR_WANT_ASYNC;
3912 if (SSL_want_async_job(s))
3913 return SSL_ERROR_WANT_ASYNC_JOB;
3914 if (SSL_want_client_hello_cb(s))
3915 return SSL_ERROR_WANT_CLIENT_HELLO_CB;
3916
3917 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
3918 (s->s3.warn_alert == SSL_AD_CLOSE_NOTIFY))
3919 return SSL_ERROR_ZERO_RETURN;
3920
3921 return SSL_ERROR_SYSCALL;
3922 }
3923
ssl_do_handshake_intern(void * vargs)3924 static int ssl_do_handshake_intern(void *vargs)
3925 {
3926 struct ssl_async_args *args;
3927 SSL *s;
3928
3929 args = (struct ssl_async_args *)vargs;
3930 s = args->s;
3931
3932 return s->handshake_func(s);
3933 }
3934
SSL_do_handshake(SSL * s)3935 int SSL_do_handshake(SSL *s)
3936 {
3937 int ret = 1;
3938
3939 if (s->handshake_func == NULL) {
3940 ERR_raise(ERR_LIB_SSL, SSL_R_CONNECTION_TYPE_NOT_SET);
3941 return -1;
3942 }
3943
3944 ossl_statem_check_finish_init(s, -1);
3945
3946 s->method->ssl_renegotiate_check(s, 0);
3947
3948 if (SSL_in_init(s) || SSL_in_before(s)) {
3949 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
3950 struct ssl_async_args args;
3951
3952 memset(&args, 0, sizeof(args));
3953 args.s = s;
3954
3955 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
3956 } else {
3957 ret = s->handshake_func(s);
3958 }
3959 }
3960 return ret;
3961 }
3962
SSL_set_accept_state(SSL * s)3963 void SSL_set_accept_state(SSL *s)
3964 {
3965 s->server = 1;
3966 s->shutdown = 0;
3967 ossl_statem_clear(s);
3968 s->handshake_func = s->method->ssl_accept;
3969 clear_ciphers(s);
3970 }
3971
SSL_set_connect_state(SSL * s)3972 void SSL_set_connect_state(SSL *s)
3973 {
3974 s->server = 0;
3975 s->shutdown = 0;
3976 ossl_statem_clear(s);
3977 s->handshake_func = s->method->ssl_connect;
3978 clear_ciphers(s);
3979 }
3980
ssl_undefined_function(SSL * s)3981 int ssl_undefined_function(SSL *s)
3982 {
3983 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3984 return 0;
3985 }
3986
ssl_undefined_void_function(void)3987 int ssl_undefined_void_function(void)
3988 {
3989 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3990 return 0;
3991 }
3992
ssl_undefined_const_function(const SSL * s)3993 int ssl_undefined_const_function(const SSL *s)
3994 {
3995 return 0;
3996 }
3997
ssl_bad_method(int ver)3998 const SSL_METHOD *ssl_bad_method(int ver)
3999 {
4000 ERR_raise(ERR_LIB_SSL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
4001 return NULL;
4002 }
4003
ssl_protocol_to_string(int version)4004 const char *ssl_protocol_to_string(int version)
4005 {
4006 switch(version)
4007 {
4008 case TLS1_3_VERSION:
4009 return "TLSv1.3";
4010
4011 case TLS1_2_VERSION:
4012 return "TLSv1.2";
4013
4014 case TLS1_1_VERSION:
4015 return "TLSv1.1";
4016
4017 case TLS1_VERSION:
4018 return "TLSv1";
4019
4020 case SSL3_VERSION:
4021 return "SSLv3";
4022
4023 case DTLS1_BAD_VER:
4024 return "DTLSv0.9";
4025
4026 case DTLS1_VERSION:
4027 return "DTLSv1";
4028
4029 case DTLS1_2_VERSION:
4030 return "DTLSv1.2";
4031
4032 default:
4033 return "unknown";
4034 }
4035 }
4036
SSL_get_version(const SSL * s)4037 const char *SSL_get_version(const SSL *s)
4038 {
4039 return ssl_protocol_to_string(s->version);
4040 }
4041
dup_ca_names(STACK_OF (X509_NAME)** dst,STACK_OF (X509_NAME)* src)4042 static int dup_ca_names(STACK_OF(X509_NAME) **dst, STACK_OF(X509_NAME) *src)
4043 {
4044 STACK_OF(X509_NAME) *sk;
4045 X509_NAME *xn;
4046 int i;
4047
4048 if (src == NULL) {
4049 *dst = NULL;
4050 return 1;
4051 }
4052
4053 if ((sk = sk_X509_NAME_new_null()) == NULL)
4054 return 0;
4055 for (i = 0; i < sk_X509_NAME_num(src); i++) {
4056 xn = X509_NAME_dup(sk_X509_NAME_value(src, i));
4057 if (xn == NULL) {
4058 sk_X509_NAME_pop_free(sk, X509_NAME_free);
4059 return 0;
4060 }
4061 if (sk_X509_NAME_insert(sk, xn, i) == 0) {
4062 X509_NAME_free(xn);
4063 sk_X509_NAME_pop_free(sk, X509_NAME_free);
4064 return 0;
4065 }
4066 }
4067 *dst = sk;
4068
4069 return 1;
4070 }
4071
SSL_dup(SSL * s)4072 SSL *SSL_dup(SSL *s)
4073 {
4074 SSL *ret;
4075 int i;
4076
4077 /* If we're not quiescent, just up_ref! */
4078 if (!SSL_in_init(s) || !SSL_in_before(s)) {
4079 CRYPTO_UP_REF(&s->references, &i, s->lock);
4080 return s;
4081 }
4082
4083 /*
4084 * Otherwise, copy configuration state, and session if set.
4085 */
4086 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
4087 return NULL;
4088
4089 if (s->session != NULL) {
4090 /*
4091 * Arranges to share the same session via up_ref. This "copies"
4092 * session-id, SSL_METHOD, sid_ctx, and 'cert'
4093 */
4094 if (!SSL_copy_session_id(ret, s))
4095 goto err;
4096 } else {
4097 /*
4098 * No session has been established yet, so we have to expect that
4099 * s->cert or ret->cert will be changed later -- they should not both
4100 * point to the same object, and thus we can't use
4101 * SSL_copy_session_id.
4102 */
4103 if (!SSL_set_ssl_method(ret, s->method))
4104 goto err;
4105
4106 if (s->cert != NULL) {
4107 ssl_cert_free(ret->cert);
4108 ret->cert = ssl_cert_dup(s->cert);
4109 if (ret->cert == NULL)
4110 goto err;
4111 }
4112
4113 if (!SSL_set_session_id_context(ret, s->sid_ctx,
4114 (int)s->sid_ctx_length))
4115 goto err;
4116 }
4117
4118 if (!ssl_dane_dup(ret, s))
4119 goto err;
4120 ret->version = s->version;
4121 ret->options = s->options;
4122 ret->min_proto_version = s->min_proto_version;
4123 ret->max_proto_version = s->max_proto_version;
4124 ret->mode = s->mode;
4125 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
4126 SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
4127 ret->msg_callback = s->msg_callback;
4128 ret->msg_callback_arg = s->msg_callback_arg;
4129 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
4130 SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
4131 ret->generate_session_id = s->generate_session_id;
4132
4133 SSL_set_info_callback(ret, SSL_get_info_callback(s));
4134
4135 /* copy app data, a little dangerous perhaps */
4136 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
4137 goto err;
4138
4139 ret->server = s->server;
4140 if (s->handshake_func) {
4141 if (s->server)
4142 SSL_set_accept_state(ret);
4143 else
4144 SSL_set_connect_state(ret);
4145 }
4146 ret->shutdown = s->shutdown;
4147 ret->hit = s->hit;
4148
4149 ret->default_passwd_callback = s->default_passwd_callback;
4150 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;
4151
4152 X509_VERIFY_PARAM_inherit(ret->param, s->param);
4153
4154 /* dup the cipher_list and cipher_list_by_id stacks */
4155 if (s->cipher_list != NULL) {
4156 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
4157 goto err;
4158 }
4159 if (s->cipher_list_by_id != NULL)
4160 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id))
4161 == NULL)
4162 goto err;
4163
4164 /* Dup the client_CA list */
4165 if (!dup_ca_names(&ret->ca_names, s->ca_names)
4166 || !dup_ca_names(&ret->client_ca_names, s->client_ca_names))
4167 goto err;
4168
4169 return ret;
4170
4171 err:
4172 SSL_free(ret);
4173 return NULL;
4174 }
4175
ssl_clear_cipher_ctx(SSL * s)4176 void ssl_clear_cipher_ctx(SSL *s)
4177 {
4178 if (s->enc_read_ctx != NULL) {
4179 EVP_CIPHER_CTX_free(s->enc_read_ctx);
4180 s->enc_read_ctx = NULL;
4181 }
4182 if (s->enc_write_ctx != NULL) {
4183 EVP_CIPHER_CTX_free(s->enc_write_ctx);
4184 s->enc_write_ctx = NULL;
4185 }
4186 #ifndef OPENSSL_NO_COMP
4187 COMP_CTX_free(s->expand);
4188 s->expand = NULL;
4189 COMP_CTX_free(s->compress);
4190 s->compress = NULL;
4191 #endif
4192 }
4193
SSL_get_certificate(const SSL * s)4194 X509 *SSL_get_certificate(const SSL *s)
4195 {
4196 if (s->cert != NULL)
4197 return s->cert->key->x509;
4198 else
4199 return NULL;
4200 }
4201
SSL_get_privatekey(const SSL * s)4202 EVP_PKEY *SSL_get_privatekey(const SSL *s)
4203 {
4204 if (s->cert != NULL)
4205 return s->cert->key->privatekey;
4206 else
4207 return NULL;
4208 }
4209
SSL_CTX_get0_certificate(const SSL_CTX * ctx)4210 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
4211 {
4212 if (ctx->cert != NULL)
4213 return ctx->cert->key->x509;
4214 else
4215 return NULL;
4216 }
4217
SSL_CTX_get0_privatekey(const SSL_CTX * ctx)4218 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
4219 {
4220 if (ctx->cert != NULL)
4221 return ctx->cert->key->privatekey;
4222 else
4223 return NULL;
4224 }
4225
SSL_get_current_cipher(const SSL * s)4226 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
4227 {
4228 if ((s->session != NULL) && (s->session->cipher != NULL))
4229 return s->session->cipher;
4230 return NULL;
4231 }
4232
SSL_get_pending_cipher(const SSL * s)4233 const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s)
4234 {
4235 return s->s3.tmp.new_cipher;
4236 }
4237
SSL_get_current_compression(const SSL * s)4238 const COMP_METHOD *SSL_get_current_compression(const SSL *s)
4239 {
4240 #ifndef OPENSSL_NO_COMP
4241 return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
4242 #else
4243 return NULL;
4244 #endif
4245 }
4246
SSL_get_current_expansion(const SSL * s)4247 const COMP_METHOD *SSL_get_current_expansion(const SSL *s)
4248 {
4249 #ifndef OPENSSL_NO_COMP
4250 return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
4251 #else
4252 return NULL;
4253 #endif
4254 }
4255
ssl_init_wbio_buffer(SSL * s)4256 int ssl_init_wbio_buffer(SSL *s)
4257 {
4258 BIO *bbio;
4259
4260 if (s->bbio != NULL) {
4261 /* Already buffered. */
4262 return 1;
4263 }
4264
4265 bbio = BIO_new(BIO_f_buffer());
4266 if (bbio == NULL || BIO_set_read_buffer_size(bbio, 1) <= 0) {
4267 BIO_free(bbio);
4268 ERR_raise(ERR_LIB_SSL, ERR_R_BUF_LIB);
4269 return 0;
4270 }
4271 s->bbio = bbio;
4272 s->wbio = BIO_push(bbio, s->wbio);
4273
4274 return 1;
4275 }
4276
ssl_free_wbio_buffer(SSL * s)4277 int ssl_free_wbio_buffer(SSL *s)
4278 {
4279 /* callers ensure s is never null */
4280 if (s->bbio == NULL)
4281 return 1;
4282
4283 s->wbio = BIO_pop(s->wbio);
4284 BIO_free(s->bbio);
4285 s->bbio = NULL;
4286
4287 return 1;
4288 }
4289
SSL_CTX_set_quiet_shutdown(SSL_CTX * ctx,int mode)4290 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
4291 {
4292 ctx->quiet_shutdown = mode;
4293 }
4294
SSL_CTX_get_quiet_shutdown(const SSL_CTX * ctx)4295 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
4296 {
4297 return ctx->quiet_shutdown;
4298 }
4299
SSL_set_quiet_shutdown(SSL * s,int mode)4300 void SSL_set_quiet_shutdown(SSL *s, int mode)
4301 {
4302 s->quiet_shutdown = mode;
4303 }
4304
SSL_get_quiet_shutdown(const SSL * s)4305 int SSL_get_quiet_shutdown(const SSL *s)
4306 {
4307 return s->quiet_shutdown;
4308 }
4309
SSL_set_shutdown(SSL * s,int mode)4310 void SSL_set_shutdown(SSL *s, int mode)
4311 {
4312 s->shutdown = mode;
4313 }
4314
SSL_get_shutdown(const SSL * s)4315 int SSL_get_shutdown(const SSL *s)
4316 {
4317 return s->shutdown;
4318 }
4319
SSL_version(const SSL * s)4320 int SSL_version(const SSL *s)
4321 {
4322 return s->version;
4323 }
4324
SSL_client_version(const SSL * s)4325 int SSL_client_version(const SSL *s)
4326 {
4327 return s->client_version;
4328 }
4329
SSL_get_SSL_CTX(const SSL * ssl)4330 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
4331 {
4332 return ssl->ctx;
4333 }
4334
SSL_set_SSL_CTX(SSL * ssl,SSL_CTX * ctx)4335 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
4336 {
4337 CERT *new_cert;
4338 if (ssl->ctx == ctx)
4339 return ssl->ctx;
4340 if (ctx == NULL)
4341 ctx = ssl->session_ctx;
4342 new_cert = ssl_cert_dup(ctx->cert);
4343 if (new_cert == NULL) {
4344 return NULL;
4345 }
4346
4347 if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) {
4348 ssl_cert_free(new_cert);
4349 return NULL;
4350 }
4351
4352 ssl_cert_free(ssl->cert);
4353 ssl->cert = new_cert;
4354
4355 /*
4356 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
4357 * so setter APIs must prevent invalid lengths from entering the system.
4358 */
4359 if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)))
4360 return NULL;
4361
4362 /*
4363 * If the session ID context matches that of the parent SSL_CTX,
4364 * inherit it from the new SSL_CTX as well. If however the context does
4365 * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
4366 * leave it unchanged.
4367 */
4368 if ((ssl->ctx != NULL) &&
4369 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
4370 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) {
4371 ssl->sid_ctx_length = ctx->sid_ctx_length;
4372 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
4373 }
4374
4375 SSL_CTX_up_ref(ctx);
4376 SSL_CTX_free(ssl->ctx); /* decrement reference count */
4377 ssl->ctx = ctx;
4378
4379 return ssl->ctx;
4380 }
4381
SSL_CTX_set_default_verify_paths(SSL_CTX * ctx)4382 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
4383 {
4384 return X509_STORE_set_default_paths_ex(ctx->cert_store, ctx->libctx,
4385 ctx->propq);
4386 }
4387
SSL_CTX_set_default_verify_dir(SSL_CTX * ctx)4388 int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
4389 {
4390 X509_LOOKUP *lookup;
4391
4392 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
4393 if (lookup == NULL)
4394 return 0;
4395
4396 /* We ignore errors, in case the directory doesn't exist */
4397 ERR_set_mark();
4398
4399 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
4400
4401 ERR_pop_to_mark();
4402
4403 return 1;
4404 }
4405
SSL_CTX_set_default_verify_file(SSL_CTX * ctx)4406 int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
4407 {
4408 X509_LOOKUP *lookup;
4409
4410 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
4411 if (lookup == NULL)
4412 return 0;
4413
4414 /* We ignore errors, in case the file doesn't exist */
4415 ERR_set_mark();
4416
4417 X509_LOOKUP_load_file_ex(lookup, NULL, X509_FILETYPE_DEFAULT, ctx->libctx,
4418 ctx->propq);
4419
4420 ERR_pop_to_mark();
4421
4422 return 1;
4423 }
4424
SSL_CTX_set_default_verify_store(SSL_CTX * ctx)4425 int SSL_CTX_set_default_verify_store(SSL_CTX *ctx)
4426 {
4427 X509_LOOKUP *lookup;
4428
4429 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_store());
4430 if (lookup == NULL)
4431 return 0;
4432
4433 /* We ignore errors, in case the directory doesn't exist */
4434 ERR_set_mark();
4435
4436 X509_LOOKUP_add_store_ex(lookup, NULL, ctx->libctx, ctx->propq);
4437
4438 ERR_pop_to_mark();
4439
4440 return 1;
4441 }
4442
SSL_CTX_load_verify_file(SSL_CTX * ctx,const char * CAfile)4443 int SSL_CTX_load_verify_file(SSL_CTX *ctx, const char *CAfile)
4444 {
4445 return X509_STORE_load_file_ex(ctx->cert_store, CAfile, ctx->libctx,
4446 ctx->propq);
4447 }
4448
SSL_CTX_load_verify_dir(SSL_CTX * ctx,const char * CApath)4449 int SSL_CTX_load_verify_dir(SSL_CTX *ctx, const char *CApath)
4450 {
4451 return X509_STORE_load_path(ctx->cert_store, CApath);
4452 }
4453
SSL_CTX_load_verify_store(SSL_CTX * ctx,const char * CAstore)4454 int SSL_CTX_load_verify_store(SSL_CTX *ctx, const char *CAstore)
4455 {
4456 return X509_STORE_load_store_ex(ctx->cert_store, CAstore, ctx->libctx,
4457 ctx->propq);
4458 }
4459
SSL_CTX_load_verify_locations(SSL_CTX * ctx,const char * CAfile,const char * CApath)4460 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
4461 const char *CApath)
4462 {
4463 if (CAfile == NULL && CApath == NULL)
4464 return 0;
4465 if (CAfile != NULL && !SSL_CTX_load_verify_file(ctx, CAfile))
4466 return 0;
4467 if (CApath != NULL && !SSL_CTX_load_verify_dir(ctx, CApath))
4468 return 0;
4469 return 1;
4470 }
4471
SSL_set_info_callback(SSL * ssl,void (* cb)(const SSL * ssl,int type,int val))4472 void SSL_set_info_callback(SSL *ssl,
4473 void (*cb) (const SSL *ssl, int type, int val))
4474 {
4475 ssl->info_callback = cb;
4476 }
4477
4478 /*
4479 * One compiler (Diab DCC) doesn't like argument names in returned function
4480 * pointer.
4481 */
SSL_get_info_callback(const SSL * ssl)4482 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
4483 int /* type */ ,
4484 int /* val */ ) {
4485 return ssl->info_callback;
4486 }
4487
SSL_set_verify_result(SSL * ssl,long arg)4488 void SSL_set_verify_result(SSL *ssl, long arg)
4489 {
4490 ssl->verify_result = arg;
4491 }
4492
SSL_get_verify_result(const SSL * ssl)4493 long SSL_get_verify_result(const SSL *ssl)
4494 {
4495 return ssl->verify_result;
4496 }
4497
SSL_get_client_random(const SSL * ssl,unsigned char * out,size_t outlen)4498 size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
4499 {
4500 if (outlen == 0)
4501 return sizeof(ssl->s3.client_random);
4502 if (outlen > sizeof(ssl->s3.client_random))
4503 outlen = sizeof(ssl->s3.client_random);
4504 memcpy(out, ssl->s3.client_random, outlen);
4505 return outlen;
4506 }
4507
SSL_get_server_random(const SSL * ssl,unsigned char * out,size_t outlen)4508 size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
4509 {
4510 if (outlen == 0)
4511 return sizeof(ssl->s3.server_random);
4512 if (outlen > sizeof(ssl->s3.server_random))
4513 outlen = sizeof(ssl->s3.server_random);
4514 memcpy(out, ssl->s3.server_random, outlen);
4515 return outlen;
4516 }
4517
SSL_SESSION_get_master_key(const SSL_SESSION * session,unsigned char * out,size_t outlen)4518 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
4519 unsigned char *out, size_t outlen)
4520 {
4521 if (outlen == 0)
4522 return session->master_key_length;
4523 if (outlen > session->master_key_length)
4524 outlen = session->master_key_length;
4525 memcpy(out, session->master_key, outlen);
4526 return outlen;
4527 }
4528
SSL_SESSION_set1_master_key(SSL_SESSION * sess,const unsigned char * in,size_t len)4529 int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in,
4530 size_t len)
4531 {
4532 if (len > sizeof(sess->master_key))
4533 return 0;
4534
4535 memcpy(sess->master_key, in, len);
4536 sess->master_key_length = len;
4537 return 1;
4538 }
4539
4540
SSL_set_ex_data(SSL * s,int idx,void * arg)4541 int SSL_set_ex_data(SSL *s, int idx, void *arg)
4542 {
4543 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4544 }
4545
SSL_get_ex_data(const SSL * s,int idx)4546 void *SSL_get_ex_data(const SSL *s, int idx)
4547 {
4548 return CRYPTO_get_ex_data(&s->ex_data, idx);
4549 }
4550
SSL_CTX_set_ex_data(SSL_CTX * s,int idx,void * arg)4551 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
4552 {
4553 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4554 }
4555
SSL_CTX_get_ex_data(const SSL_CTX * s,int idx)4556 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
4557 {
4558 return CRYPTO_get_ex_data(&s->ex_data, idx);
4559 }
4560
SSL_CTX_get_cert_store(const SSL_CTX * ctx)4561 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
4562 {
4563 return ctx->cert_store;
4564 }
4565
SSL_CTX_set_cert_store(SSL_CTX * ctx,X509_STORE * store)4566 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
4567 {
4568 X509_STORE_free(ctx->cert_store);
4569 ctx->cert_store = store;
4570 }
4571
SSL_CTX_set1_cert_store(SSL_CTX * ctx,X509_STORE * store)4572 void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
4573 {
4574 if (store != NULL)
4575 X509_STORE_up_ref(store);
4576 SSL_CTX_set_cert_store(ctx, store);
4577 }
4578
SSL_want(const SSL * s)4579 int SSL_want(const SSL *s)
4580 {
4581 return s->rwstate;
4582 }
4583
4584 #ifndef OPENSSL_NO_PSK
SSL_CTX_use_psk_identity_hint(SSL_CTX * ctx,const char * identity_hint)4585 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
4586 {
4587 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4588 ERR_raise(ERR_LIB_SSL, SSL_R_DATA_LENGTH_TOO_LONG);
4589 return 0;
4590 }
4591 OPENSSL_free(ctx->cert->psk_identity_hint);
4592 if (identity_hint != NULL) {
4593 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4594 if (ctx->cert->psk_identity_hint == NULL)
4595 return 0;
4596 } else
4597 ctx->cert->psk_identity_hint = NULL;
4598 return 1;
4599 }
4600
SSL_use_psk_identity_hint(SSL * s,const char * identity_hint)4601 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
4602 {
4603 if (s == NULL)
4604 return 0;
4605
4606 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4607 ERR_raise(ERR_LIB_SSL, SSL_R_DATA_LENGTH_TOO_LONG);
4608 return 0;
4609 }
4610 OPENSSL_free(s->cert->psk_identity_hint);
4611 if (identity_hint != NULL) {
4612 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4613 if (s->cert->psk_identity_hint == NULL)
4614 return 0;
4615 } else
4616 s->cert->psk_identity_hint = NULL;
4617 return 1;
4618 }
4619
SSL_get_psk_identity_hint(const SSL * s)4620 const char *SSL_get_psk_identity_hint(const SSL *s)
4621 {
4622 if (s == NULL || s->session == NULL)
4623 return NULL;
4624 return s->session->psk_identity_hint;
4625 }
4626
SSL_get_psk_identity(const SSL * s)4627 const char *SSL_get_psk_identity(const SSL *s)
4628 {
4629 if (s == NULL || s->session == NULL)
4630 return NULL;
4631 return s->session->psk_identity;
4632 }
4633
SSL_set_psk_client_callback(SSL * s,SSL_psk_client_cb_func cb)4634 void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
4635 {
4636 s->psk_client_callback = cb;
4637 }
4638
SSL_CTX_set_psk_client_callback(SSL_CTX * ctx,SSL_psk_client_cb_func cb)4639 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
4640 {
4641 ctx->psk_client_callback = cb;
4642 }
4643
SSL_set_psk_server_callback(SSL * s,SSL_psk_server_cb_func cb)4644 void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
4645 {
4646 s->psk_server_callback = cb;
4647 }
4648
SSL_CTX_set_psk_server_callback(SSL_CTX * ctx,SSL_psk_server_cb_func cb)4649 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
4650 {
4651 ctx->psk_server_callback = cb;
4652 }
4653 #endif
4654
SSL_set_psk_find_session_callback(SSL * s,SSL_psk_find_session_cb_func cb)4655 void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb)
4656 {
4657 s->psk_find_session_cb = cb;
4658 }
4659
SSL_CTX_set_psk_find_session_callback(SSL_CTX * ctx,SSL_psk_find_session_cb_func cb)4660 void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
4661 SSL_psk_find_session_cb_func cb)
4662 {
4663 ctx->psk_find_session_cb = cb;
4664 }
4665
SSL_set_psk_use_session_callback(SSL * s,SSL_psk_use_session_cb_func cb)4666 void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
4667 {
4668 s->psk_use_session_cb = cb;
4669 }
4670
SSL_CTX_set_psk_use_session_callback(SSL_CTX * ctx,SSL_psk_use_session_cb_func cb)4671 void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx,
4672 SSL_psk_use_session_cb_func cb)
4673 {
4674 ctx->psk_use_session_cb = cb;
4675 }
4676
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))4677 void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
4678 void (*cb) (int write_p, int version,
4679 int content_type, const void *buf,
4680 size_t len, SSL *ssl, void *arg))
4681 {
4682 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4683 }
4684
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))4685 void SSL_set_msg_callback(SSL *ssl,
4686 void (*cb) (int write_p, int version,
4687 int content_type, const void *buf,
4688 size_t len, SSL *ssl, void *arg))
4689 {
4690 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4691 }
4692
SSL_CTX_set_not_resumable_session_callback(SSL_CTX * ctx,int (* cb)(SSL * ssl,int is_forward_secure))4693 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
4694 int (*cb) (SSL *ssl,
4695 int
4696 is_forward_secure))
4697 {
4698 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4699 (void (*)(void))cb);
4700 }
4701
SSL_set_not_resumable_session_callback(SSL * ssl,int (* cb)(SSL * ssl,int is_forward_secure))4702 void SSL_set_not_resumable_session_callback(SSL *ssl,
4703 int (*cb) (SSL *ssl,
4704 int is_forward_secure))
4705 {
4706 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4707 (void (*)(void))cb);
4708 }
4709
SSL_CTX_set_record_padding_callback(SSL_CTX * ctx,size_t (* cb)(SSL * ssl,int type,size_t len,void * arg))4710 void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx,
4711 size_t (*cb) (SSL *ssl, int type,
4712 size_t len, void *arg))
4713 {
4714 ctx->record_padding_cb = cb;
4715 }
4716
SSL_CTX_set_record_padding_callback_arg(SSL_CTX * ctx,void * arg)4717 void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg)
4718 {
4719 ctx->record_padding_arg = arg;
4720 }
4721
SSL_CTX_get_record_padding_callback_arg(const SSL_CTX * ctx)4722 void *SSL_CTX_get_record_padding_callback_arg(const SSL_CTX *ctx)
4723 {
4724 return ctx->record_padding_arg;
4725 }
4726
SSL_CTX_set_block_padding(SSL_CTX * ctx,size_t block_size)4727 int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size)
4728 {
4729 /* block size of 0 or 1 is basically no padding */
4730 if (block_size == 1)
4731 ctx->block_padding = 0;
4732 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4733 ctx->block_padding = block_size;
4734 else
4735 return 0;
4736 return 1;
4737 }
4738
SSL_set_record_padding_callback(SSL * ssl,size_t (* cb)(SSL * ssl,int type,size_t len,void * arg))4739 int SSL_set_record_padding_callback(SSL *ssl,
4740 size_t (*cb) (SSL *ssl, int type,
4741 size_t len, void *arg))
4742 {
4743 BIO *b;
4744
4745 b = SSL_get_wbio(ssl);
4746 if (b == NULL || !BIO_get_ktls_send(b)) {
4747 ssl->record_padding_cb = cb;
4748 return 1;
4749 }
4750 return 0;
4751 }
4752
SSL_set_record_padding_callback_arg(SSL * ssl,void * arg)4753 void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg)
4754 {
4755 ssl->record_padding_arg = arg;
4756 }
4757
SSL_get_record_padding_callback_arg(const SSL * ssl)4758 void *SSL_get_record_padding_callback_arg(const SSL *ssl)
4759 {
4760 return ssl->record_padding_arg;
4761 }
4762
SSL_set_block_padding(SSL * ssl,size_t block_size)4763 int SSL_set_block_padding(SSL *ssl, size_t block_size)
4764 {
4765 /* block size of 0 or 1 is basically no padding */
4766 if (block_size == 1)
4767 ssl->block_padding = 0;
4768 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4769 ssl->block_padding = block_size;
4770 else
4771 return 0;
4772 return 1;
4773 }
4774
SSL_set_num_tickets(SSL * s,size_t num_tickets)4775 int SSL_set_num_tickets(SSL *s, size_t num_tickets)
4776 {
4777 s->num_tickets = num_tickets;
4778
4779 return 1;
4780 }
4781
SSL_get_num_tickets(const SSL * s)4782 size_t SSL_get_num_tickets(const SSL *s)
4783 {
4784 return s->num_tickets;
4785 }
4786
SSL_CTX_set_num_tickets(SSL_CTX * ctx,size_t num_tickets)4787 int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets)
4788 {
4789 ctx->num_tickets = num_tickets;
4790
4791 return 1;
4792 }
4793
SSL_CTX_get_num_tickets(const SSL_CTX * ctx)4794 size_t SSL_CTX_get_num_tickets(const SSL_CTX *ctx)
4795 {
4796 return ctx->num_tickets;
4797 }
4798
4799 /*
4800 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
4801 * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
4802 * If EVP_MD pointer is passed, initializes ctx with this |md|.
4803 * Returns the newly allocated ctx;
4804 */
4805
ssl_replace_hash(EVP_MD_CTX ** hash,const EVP_MD * md)4806 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
4807 {
4808 ssl_clear_hash_ctx(hash);
4809 *hash = EVP_MD_CTX_new();
4810 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
4811 EVP_MD_CTX_free(*hash);
4812 *hash = NULL;
4813 return NULL;
4814 }
4815 return *hash;
4816 }
4817
ssl_clear_hash_ctx(EVP_MD_CTX ** hash)4818 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
4819 {
4820
4821 EVP_MD_CTX_free(*hash);
4822 *hash = NULL;
4823 }
4824
4825 /* Retrieve handshake hashes */
ssl_handshake_hash(SSL * s,unsigned char * out,size_t outlen,size_t * hashlen)4826 int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
4827 size_t *hashlen)
4828 {
4829 EVP_MD_CTX *ctx = NULL;
4830 EVP_MD_CTX *hdgst = s->s3.handshake_dgst;
4831 int hashleni = EVP_MD_CTX_get_size(hdgst);
4832 int ret = 0;
4833
4834 if (hashleni < 0 || (size_t)hashleni > outlen) {
4835 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
4836 goto err;
4837 }
4838
4839 ctx = EVP_MD_CTX_new();
4840 if (ctx == NULL) {
4841 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
4842 goto err;
4843 }
4844
4845 if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
4846 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) {
4847 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
4848 goto err;
4849 }
4850
4851 *hashlen = hashleni;
4852
4853 ret = 1;
4854 err:
4855 EVP_MD_CTX_free(ctx);
4856 return ret;
4857 }
4858
SSL_session_reused(const SSL * s)4859 int SSL_session_reused(const SSL *s)
4860 {
4861 return s->hit;
4862 }
4863
SSL_is_server(const SSL * s)4864 int SSL_is_server(const SSL *s)
4865 {
4866 return s->server;
4867 }
4868
4869 #ifndef OPENSSL_NO_DEPRECATED_1_1_0
SSL_set_debug(SSL * s,int debug)4870 void SSL_set_debug(SSL *s, int debug)
4871 {
4872 /* Old function was do-nothing anyway... */
4873 (void)s;
4874 (void)debug;
4875 }
4876 #endif
4877
SSL_set_security_level(SSL * s,int level)4878 void SSL_set_security_level(SSL *s, int level)
4879 {
4880 s->cert->sec_level = level;
4881 }
4882
SSL_get_security_level(const SSL * s)4883 int SSL_get_security_level(const SSL *s)
4884 {
4885 return s->cert->sec_level;
4886 }
4887
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))4888 void SSL_set_security_callback(SSL *s,
4889 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4890 int op, int bits, int nid,
4891 void *other, void *ex))
4892 {
4893 s->cert->sec_cb = cb;
4894 }
4895
SSL_get_security_callback(const SSL * s)4896 int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
4897 const SSL_CTX *ctx, int op,
4898 int bits, int nid, void *other,
4899 void *ex) {
4900 return s->cert->sec_cb;
4901 }
4902
SSL_set0_security_ex_data(SSL * s,void * ex)4903 void SSL_set0_security_ex_data(SSL *s, void *ex)
4904 {
4905 s->cert->sec_ex = ex;
4906 }
4907
SSL_get0_security_ex_data(const SSL * s)4908 void *SSL_get0_security_ex_data(const SSL *s)
4909 {
4910 return s->cert->sec_ex;
4911 }
4912
SSL_CTX_set_security_level(SSL_CTX * ctx,int level)4913 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
4914 {
4915 ctx->cert->sec_level = level;
4916 }
4917
SSL_CTX_get_security_level(const SSL_CTX * ctx)4918 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
4919 {
4920 return ctx->cert->sec_level;
4921 }
4922
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))4923 void SSL_CTX_set_security_callback(SSL_CTX *ctx,
4924 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4925 int op, int bits, int nid,
4926 void *other, void *ex))
4927 {
4928 ctx->cert->sec_cb = cb;
4929 }
4930
SSL_CTX_get_security_callback(const SSL_CTX * ctx)4931 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
4932 const SSL_CTX *ctx,
4933 int op, int bits,
4934 int nid,
4935 void *other,
4936 void *ex) {
4937 return ctx->cert->sec_cb;
4938 }
4939
SSL_CTX_set0_security_ex_data(SSL_CTX * ctx,void * ex)4940 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
4941 {
4942 ctx->cert->sec_ex = ex;
4943 }
4944
SSL_CTX_get0_security_ex_data(const SSL_CTX * ctx)4945 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
4946 {
4947 return ctx->cert->sec_ex;
4948 }
4949
SSL_CTX_get_options(const SSL_CTX * ctx)4950 uint64_t SSL_CTX_get_options(const SSL_CTX *ctx)
4951 {
4952 return ctx->options;
4953 }
4954
SSL_get_options(const SSL * s)4955 uint64_t SSL_get_options(const SSL *s)
4956 {
4957 return s->options;
4958 }
4959
SSL_CTX_set_options(SSL_CTX * ctx,uint64_t op)4960 uint64_t SSL_CTX_set_options(SSL_CTX *ctx, uint64_t op)
4961 {
4962 return ctx->options |= op;
4963 }
4964
SSL_set_options(SSL * s,uint64_t op)4965 uint64_t SSL_set_options(SSL *s, uint64_t op)
4966 {
4967 return s->options |= op;
4968 }
4969
SSL_CTX_clear_options(SSL_CTX * ctx,uint64_t op)4970 uint64_t SSL_CTX_clear_options(SSL_CTX *ctx, uint64_t op)
4971 {
4972 return ctx->options &= ~op;
4973 }
4974
SSL_clear_options(SSL * s,uint64_t op)4975 uint64_t SSL_clear_options(SSL *s, uint64_t op)
4976 {
4977 return s->options &= ~op;
4978 }
4979
STACK_OF(X509)4980 STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
4981 {
4982 return s->verified_chain;
4983 }
4984
4985 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
4986
4987 #ifndef OPENSSL_NO_CT
4988
4989 /*
4990 * Moves SCTs from the |src| stack to the |dst| stack.
4991 * The source of each SCT will be set to |origin|.
4992 * If |dst| points to a NULL pointer, a new stack will be created and owned by
4993 * the caller.
4994 * Returns the number of SCTs moved, or a negative integer if an error occurs.
4995 * The |dst| stack is created and possibly partially populated even in case
4996 * of error, likewise the |src| stack may be left in an intermediate state.
4997 */
ct_move_scts(STACK_OF (SCT)** dst,STACK_OF (SCT)* src,sct_source_t origin)4998 static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
4999 sct_source_t origin)
5000 {
5001 int scts_moved = 0;
5002 SCT *sct = NULL;
5003
5004 if (*dst == NULL) {
5005 *dst = sk_SCT_new_null();
5006 if (*dst == NULL) {
5007 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
5008 goto err;
5009 }
5010 }
5011
5012 while ((sct = sk_SCT_pop(src)) != NULL) {
5013 if (SCT_set_source(sct, origin) != 1)
5014 goto err;
5015
5016 if (!sk_SCT_push(*dst, sct))
5017 goto err;
5018 scts_moved += 1;
5019 }
5020
5021 return scts_moved;
5022 err:
5023 SCT_free(sct);
5024 return -1;
5025 }
5026
5027 /*
5028 * Look for data collected during ServerHello and parse if found.
5029 * Returns the number of SCTs extracted.
5030 */
ct_extract_tls_extension_scts(SSL * s)5031 static int ct_extract_tls_extension_scts(SSL *s)
5032 {
5033 int scts_extracted = 0;
5034
5035 if (s->ext.scts != NULL) {
5036 const unsigned char *p = s->ext.scts;
5037 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
5038
5039 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
5040
5041 SCT_LIST_free(scts);
5042 }
5043
5044 return scts_extracted;
5045 }
5046
5047 /*
5048 * Checks for an OCSP response and then attempts to extract any SCTs found if it
5049 * contains an SCT X509 extension. They will be stored in |s->scts|.
5050 * Returns:
5051 * - The number of SCTs extracted, assuming an OCSP response exists.
5052 * - 0 if no OCSP response exists or it contains no SCTs.
5053 * - A negative integer if an error occurs.
5054 */
ct_extract_ocsp_response_scts(SSL * s)5055 static int ct_extract_ocsp_response_scts(SSL *s)
5056 {
5057 # ifndef OPENSSL_NO_OCSP
5058 int scts_extracted = 0;
5059 const unsigned char *p;
5060 OCSP_BASICRESP *br = NULL;
5061 OCSP_RESPONSE *rsp = NULL;
5062 STACK_OF(SCT) *scts = NULL;
5063 int i;
5064
5065 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
5066 goto err;
5067
5068 p = s->ext.ocsp.resp;
5069 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
5070 if (rsp == NULL)
5071 goto err;
5072
5073 br = OCSP_response_get1_basic(rsp);
5074 if (br == NULL)
5075 goto err;
5076
5077 for (i = 0; i < OCSP_resp_count(br); ++i) {
5078 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
5079
5080 if (single == NULL)
5081 continue;
5082
5083 scts =
5084 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
5085 scts_extracted =
5086 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
5087 if (scts_extracted < 0)
5088 goto err;
5089 }
5090 err:
5091 SCT_LIST_free(scts);
5092 OCSP_BASICRESP_free(br);
5093 OCSP_RESPONSE_free(rsp);
5094 return scts_extracted;
5095 # else
5096 /* Behave as if no OCSP response exists */
5097 return 0;
5098 # endif
5099 }
5100
5101 /*
5102 * Attempts to extract SCTs from the peer certificate.
5103 * Return the number of SCTs extracted, or a negative integer if an error
5104 * occurs.
5105 */
ct_extract_x509v3_extension_scts(SSL * s)5106 static int ct_extract_x509v3_extension_scts(SSL *s)
5107 {
5108 int scts_extracted = 0;
5109 X509 *cert = s->session != NULL ? s->session->peer : NULL;
5110
5111 if (cert != NULL) {
5112 STACK_OF(SCT) *scts =
5113 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
5114
5115 scts_extracted =
5116 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
5117
5118 SCT_LIST_free(scts);
5119 }
5120
5121 return scts_extracted;
5122 }
5123
5124 /*
5125 * Attempts to find all received SCTs by checking TLS extensions, the OCSP
5126 * response (if it exists) and X509v3 extensions in the certificate.
5127 * Returns NULL if an error occurs.
5128 */
STACK_OF(SCT)5129 const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
5130 {
5131 if (!s->scts_parsed) {
5132 if (ct_extract_tls_extension_scts(s) < 0 ||
5133 ct_extract_ocsp_response_scts(s) < 0 ||
5134 ct_extract_x509v3_extension_scts(s) < 0)
5135 goto err;
5136
5137 s->scts_parsed = 1;
5138 }
5139 return s->scts;
5140 err:
5141 return NULL;
5142 }
5143
ct_permissive(const CT_POLICY_EVAL_CTX * ctx,const STACK_OF (SCT)* scts,void * unused_arg)5144 static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
5145 const STACK_OF(SCT) *scts, void *unused_arg)
5146 {
5147 return 1;
5148 }
5149
ct_strict(const CT_POLICY_EVAL_CTX * ctx,const STACK_OF (SCT)* scts,void * unused_arg)5150 static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
5151 const STACK_OF(SCT) *scts, void *unused_arg)
5152 {
5153 int count = scts != NULL ? sk_SCT_num(scts) : 0;
5154 int i;
5155
5156 for (i = 0; i < count; ++i) {
5157 SCT *sct = sk_SCT_value(scts, i);
5158 int status = SCT_get_validation_status(sct);
5159
5160 if (status == SCT_VALIDATION_STATUS_VALID)
5161 return 1;
5162 }
5163 ERR_raise(ERR_LIB_SSL, SSL_R_NO_VALID_SCTS);
5164 return 0;
5165 }
5166
SSL_set_ct_validation_callback(SSL * s,ssl_ct_validation_cb callback,void * arg)5167 int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
5168 void *arg)
5169 {
5170 /*
5171 * Since code exists that uses the custom extension handler for CT, look
5172 * for this and throw an error if they have already registered to use CT.
5173 */
5174 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
5175 TLSEXT_TYPE_signed_certificate_timestamp))
5176 {
5177 ERR_raise(ERR_LIB_SSL, SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
5178 return 0;
5179 }
5180
5181 if (callback != NULL) {
5182 /*
5183 * If we are validating CT, then we MUST accept SCTs served via OCSP
5184 */
5185 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
5186 return 0;
5187 }
5188
5189 s->ct_validation_callback = callback;
5190 s->ct_validation_callback_arg = arg;
5191
5192 return 1;
5193 }
5194
SSL_CTX_set_ct_validation_callback(SSL_CTX * ctx,ssl_ct_validation_cb callback,void * arg)5195 int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
5196 ssl_ct_validation_cb callback, void *arg)
5197 {
5198 /*
5199 * Since code exists that uses the custom extension handler for CT, look for
5200 * this and throw an error if they have already registered to use CT.
5201 */
5202 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
5203 TLSEXT_TYPE_signed_certificate_timestamp))
5204 {
5205 ERR_raise(ERR_LIB_SSL, SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
5206 return 0;
5207 }
5208
5209 ctx->ct_validation_callback = callback;
5210 ctx->ct_validation_callback_arg = arg;
5211 return 1;
5212 }
5213
SSL_ct_is_enabled(const SSL * s)5214 int SSL_ct_is_enabled(const SSL *s)
5215 {
5216 return s->ct_validation_callback != NULL;
5217 }
5218
SSL_CTX_ct_is_enabled(const SSL_CTX * ctx)5219 int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
5220 {
5221 return ctx->ct_validation_callback != NULL;
5222 }
5223
ssl_validate_ct(SSL * s)5224 int ssl_validate_ct(SSL *s)
5225 {
5226 int ret = 0;
5227 X509 *cert = s->session != NULL ? s->session->peer : NULL;
5228 X509 *issuer;
5229 SSL_DANE *dane = &s->dane;
5230 CT_POLICY_EVAL_CTX *ctx = NULL;
5231 const STACK_OF(SCT) *scts;
5232
5233 /*
5234 * If no callback is set, the peer is anonymous, or its chain is invalid,
5235 * skip SCT validation - just return success. Applications that continue
5236 * handshakes without certificates, with unverified chains, or pinned leaf
5237 * certificates are outside the scope of the WebPKI and CT.
5238 *
5239 * The above exclusions notwithstanding the vast majority of peers will
5240 * have rather ordinary certificate chains validated by typical
5241 * applications that perform certificate verification and therefore will
5242 * process SCTs when enabled.
5243 */
5244 if (s->ct_validation_callback == NULL || cert == NULL ||
5245 s->verify_result != X509_V_OK ||
5246 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
5247 return 1;
5248
5249 /*
5250 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
5251 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2
5252 */
5253 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
5254 switch (dane->mtlsa->usage) {
5255 case DANETLS_USAGE_DANE_TA:
5256 case DANETLS_USAGE_DANE_EE:
5257 return 1;
5258 }
5259 }
5260
5261 ctx = CT_POLICY_EVAL_CTX_new_ex(s->ctx->libctx, s->ctx->propq);
5262 if (ctx == NULL) {
5263 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
5264 goto end;
5265 }
5266
5267 issuer = sk_X509_value(s->verified_chain, 1);
5268 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
5269 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
5270 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store);
5271 CT_POLICY_EVAL_CTX_set_time(
5272 ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000);
5273
5274 scts = SSL_get0_peer_scts(s);
5275
5276 /*
5277 * This function returns success (> 0) only when all the SCTs are valid, 0
5278 * when some are invalid, and < 0 on various internal errors (out of
5279 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient
5280 * reason to abort the handshake, that decision is up to the callback.
5281 * Therefore, we error out only in the unexpected case that the return
5282 * value is negative.
5283 *
5284 * XXX: One might well argue that the return value of this function is an
5285 * unfortunate design choice. Its job is only to determine the validation
5286 * status of each of the provided SCTs. So long as it correctly separates
5287 * the wheat from the chaff it should return success. Failure in this case
5288 * ought to correspond to an inability to carry out its duties.
5289 */
5290 if (SCT_LIST_validate(scts, ctx) < 0) {
5291 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_SCT_VERIFICATION_FAILED);
5292 goto end;
5293 }
5294
5295 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
5296 if (ret < 0)
5297 ret = 0; /* This function returns 0 on failure */
5298 if (!ret)
5299 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_R_CALLBACK_FAILED);
5300
5301 end:
5302 CT_POLICY_EVAL_CTX_free(ctx);
5303 /*
5304 * With SSL_VERIFY_NONE the session may be cached and re-used despite a
5305 * failure return code here. Also the application may wish the complete
5306 * the handshake, and then disconnect cleanly at a higher layer, after
5307 * checking the verification status of the completed connection.
5308 *
5309 * We therefore force a certificate verification failure which will be
5310 * visible via SSL_get_verify_result() and cached as part of any resumed
5311 * session.
5312 *
5313 * Note: the permissive callback is for information gathering only, always
5314 * returns success, and does not affect verification status. Only the
5315 * strict callback or a custom application-specified callback can trigger
5316 * connection failure or record a verification error.
5317 */
5318 if (ret <= 0)
5319 s->verify_result = X509_V_ERR_NO_VALID_SCTS;
5320 return ret;
5321 }
5322
SSL_CTX_enable_ct(SSL_CTX * ctx,int validation_mode)5323 int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
5324 {
5325 switch (validation_mode) {
5326 default:
5327 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_CT_VALIDATION_TYPE);
5328 return 0;
5329 case SSL_CT_VALIDATION_PERMISSIVE:
5330 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
5331 case SSL_CT_VALIDATION_STRICT:
5332 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
5333 }
5334 }
5335
SSL_enable_ct(SSL * s,int validation_mode)5336 int SSL_enable_ct(SSL *s, int validation_mode)
5337 {
5338 switch (validation_mode) {
5339 default:
5340 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_CT_VALIDATION_TYPE);
5341 return 0;
5342 case SSL_CT_VALIDATION_PERMISSIVE:
5343 return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
5344 case SSL_CT_VALIDATION_STRICT:
5345 return SSL_set_ct_validation_callback(s, ct_strict, NULL);
5346 }
5347 }
5348
SSL_CTX_set_default_ctlog_list_file(SSL_CTX * ctx)5349 int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
5350 {
5351 return CTLOG_STORE_load_default_file(ctx->ctlog_store);
5352 }
5353
SSL_CTX_set_ctlog_list_file(SSL_CTX * ctx,const char * path)5354 int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
5355 {
5356 return CTLOG_STORE_load_file(ctx->ctlog_store, path);
5357 }
5358
SSL_CTX_set0_ctlog_store(SSL_CTX * ctx,CTLOG_STORE * logs)5359 void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
5360 {
5361 CTLOG_STORE_free(ctx->ctlog_store);
5362 ctx->ctlog_store = logs;
5363 }
5364
SSL_CTX_get0_ctlog_store(const SSL_CTX * ctx)5365 const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
5366 {
5367 return ctx->ctlog_store;
5368 }
5369
5370 #endif /* OPENSSL_NO_CT */
5371
SSL_CTX_set_client_hello_cb(SSL_CTX * c,SSL_client_hello_cb_fn cb,void * arg)5372 void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb,
5373 void *arg)
5374 {
5375 c->client_hello_cb = cb;
5376 c->client_hello_cb_arg = arg;
5377 }
5378
SSL_client_hello_isv2(SSL * s)5379 int SSL_client_hello_isv2(SSL *s)
5380 {
5381 if (s->clienthello == NULL)
5382 return 0;
5383 return s->clienthello->isv2;
5384 }
5385
SSL_client_hello_get0_legacy_version(SSL * s)5386 unsigned int SSL_client_hello_get0_legacy_version(SSL *s)
5387 {
5388 if (s->clienthello == NULL)
5389 return 0;
5390 return s->clienthello->legacy_version;
5391 }
5392
SSL_client_hello_get0_random(SSL * s,const unsigned char ** out)5393 size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out)
5394 {
5395 if (s->clienthello == NULL)
5396 return 0;
5397 if (out != NULL)
5398 *out = s->clienthello->random;
5399 return SSL3_RANDOM_SIZE;
5400 }
5401
SSL_client_hello_get0_session_id(SSL * s,const unsigned char ** out)5402 size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out)
5403 {
5404 if (s->clienthello == NULL)
5405 return 0;
5406 if (out != NULL)
5407 *out = s->clienthello->session_id;
5408 return s->clienthello->session_id_len;
5409 }
5410
SSL_client_hello_get0_ciphers(SSL * s,const unsigned char ** out)5411 size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out)
5412 {
5413 if (s->clienthello == NULL)
5414 return 0;
5415 if (out != NULL)
5416 *out = PACKET_data(&s->clienthello->ciphersuites);
5417 return PACKET_remaining(&s->clienthello->ciphersuites);
5418 }
5419
SSL_client_hello_get0_compression_methods(SSL * s,const unsigned char ** out)5420 size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out)
5421 {
5422 if (s->clienthello == NULL)
5423 return 0;
5424 if (out != NULL)
5425 *out = s->clienthello->compressions;
5426 return s->clienthello->compressions_len;
5427 }
5428
SSL_client_hello_get1_extensions_present(SSL * s,int ** out,size_t * outlen)5429 int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen)
5430 {
5431 RAW_EXTENSION *ext;
5432 int *present;
5433 size_t num = 0, i;
5434
5435 if (s->clienthello == NULL || out == NULL || outlen == NULL)
5436 return 0;
5437 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
5438 ext = s->clienthello->pre_proc_exts + i;
5439 if (ext->present)
5440 num++;
5441 }
5442 if (num == 0) {
5443 *out = NULL;
5444 *outlen = 0;
5445 return 1;
5446 }
5447 if ((present = OPENSSL_malloc(sizeof(*present) * num)) == NULL) {
5448 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
5449 return 0;
5450 }
5451 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
5452 ext = s->clienthello->pre_proc_exts + i;
5453 if (ext->present) {
5454 if (ext->received_order >= num)
5455 goto err;
5456 present[ext->received_order] = ext->type;
5457 }
5458 }
5459 *out = present;
5460 *outlen = num;
5461 return 1;
5462 err:
5463 OPENSSL_free(present);
5464 return 0;
5465 }
5466
SSL_client_hello_get0_ext(SSL * s,unsigned int type,const unsigned char ** out,size_t * outlen)5467 int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
5468 size_t *outlen)
5469 {
5470 size_t i;
5471 RAW_EXTENSION *r;
5472
5473 if (s->clienthello == NULL)
5474 return 0;
5475 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) {
5476 r = s->clienthello->pre_proc_exts + i;
5477 if (r->present && r->type == type) {
5478 if (out != NULL)
5479 *out = PACKET_data(&r->data);
5480 if (outlen != NULL)
5481 *outlen = PACKET_remaining(&r->data);
5482 return 1;
5483 }
5484 }
5485 return 0;
5486 }
5487
SSL_free_buffers(SSL * ssl)5488 int SSL_free_buffers(SSL *ssl)
5489 {
5490 RECORD_LAYER *rl = &ssl->rlayer;
5491
5492 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl))
5493 return 0;
5494
5495 if (RECORD_LAYER_data_present(rl))
5496 return 0;
5497
5498 RECORD_LAYER_release(rl);
5499 return 1;
5500 }
5501
SSL_alloc_buffers(SSL * ssl)5502 int SSL_alloc_buffers(SSL *ssl)
5503 {
5504 return ssl3_setup_buffers(ssl);
5505 }
5506
SSL_CTX_set_keylog_callback(SSL_CTX * ctx,SSL_CTX_keylog_cb_func cb)5507 void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
5508 {
5509 ctx->keylog_callback = cb;
5510 }
5511
SSL_CTX_get_keylog_callback(const SSL_CTX * ctx)5512 SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
5513 {
5514 return ctx->keylog_callback;
5515 }
5516
nss_keylog_int(const char * prefix,SSL * ssl,const uint8_t * parameter_1,size_t parameter_1_len,const uint8_t * parameter_2,size_t parameter_2_len)5517 static int nss_keylog_int(const char *prefix,
5518 SSL *ssl,
5519 const uint8_t *parameter_1,
5520 size_t parameter_1_len,
5521 const uint8_t *parameter_2,
5522 size_t parameter_2_len)
5523 {
5524 char *out = NULL;
5525 char *cursor = NULL;
5526 size_t out_len = 0;
5527 size_t i;
5528 size_t prefix_len;
5529
5530 if (ssl->ctx->keylog_callback == NULL)
5531 return 1;
5532
5533 /*
5534 * Our output buffer will contain the following strings, rendered with
5535 * space characters in between, terminated by a NULL character: first the
5536 * prefix, then the first parameter, then the second parameter. The
5537 * meaning of each parameter depends on the specific key material being
5538 * logged. Note that the first and second parameters are encoded in
5539 * hexadecimal, so we need a buffer that is twice their lengths.
5540 */
5541 prefix_len = strlen(prefix);
5542 out_len = prefix_len + (2 * parameter_1_len) + (2 * parameter_2_len) + 3;
5543 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
5544 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
5545 return 0;
5546 }
5547
5548 strcpy(cursor, prefix);
5549 cursor += prefix_len;
5550 *cursor++ = ' ';
5551
5552 for (i = 0; i < parameter_1_len; i++) {
5553 sprintf(cursor, "%02x", parameter_1[i]);
5554 cursor += 2;
5555 }
5556 *cursor++ = ' ';
5557
5558 for (i = 0; i < parameter_2_len; i++) {
5559 sprintf(cursor, "%02x", parameter_2[i]);
5560 cursor += 2;
5561 }
5562 *cursor = '\0';
5563
5564 ssl->ctx->keylog_callback(ssl, (const char *)out);
5565 OPENSSL_clear_free(out, out_len);
5566 return 1;
5567
5568 }
5569
ssl_log_rsa_client_key_exchange(SSL * ssl,const uint8_t * encrypted_premaster,size_t encrypted_premaster_len,const uint8_t * premaster,size_t premaster_len)5570 int ssl_log_rsa_client_key_exchange(SSL *ssl,
5571 const uint8_t *encrypted_premaster,
5572 size_t encrypted_premaster_len,
5573 const uint8_t *premaster,
5574 size_t premaster_len)
5575 {
5576 if (encrypted_premaster_len < 8) {
5577 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
5578 return 0;
5579 }
5580
5581 /* We only want the first 8 bytes of the encrypted premaster as a tag. */
5582 return nss_keylog_int("RSA",
5583 ssl,
5584 encrypted_premaster,
5585 8,
5586 premaster,
5587 premaster_len);
5588 }
5589
ssl_log_secret(SSL * ssl,const char * label,const uint8_t * secret,size_t secret_len)5590 int ssl_log_secret(SSL *ssl,
5591 const char *label,
5592 const uint8_t *secret,
5593 size_t secret_len)
5594 {
5595 return nss_keylog_int(label,
5596 ssl,
5597 ssl->s3.client_random,
5598 SSL3_RANDOM_SIZE,
5599 secret,
5600 secret_len);
5601 }
5602
5603 #define SSLV2_CIPHER_LEN 3
5604
ssl_cache_cipherlist(SSL * s,PACKET * cipher_suites,int sslv2format)5605 int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format)
5606 {
5607 int n;
5608
5609 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5610
5611 if (PACKET_remaining(cipher_suites) == 0) {
5612 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CIPHERS_SPECIFIED);
5613 return 0;
5614 }
5615
5616 if (PACKET_remaining(cipher_suites) % n != 0) {
5617 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5618 return 0;
5619 }
5620
5621 OPENSSL_free(s->s3.tmp.ciphers_raw);
5622 s->s3.tmp.ciphers_raw = NULL;
5623 s->s3.tmp.ciphers_rawlen = 0;
5624
5625 if (sslv2format) {
5626 size_t numciphers = PACKET_remaining(cipher_suites) / n;
5627 PACKET sslv2ciphers = *cipher_suites;
5628 unsigned int leadbyte;
5629 unsigned char *raw;
5630
5631 /*
5632 * We store the raw ciphers list in SSLv3+ format so we need to do some
5633 * preprocessing to convert the list first. If there are any SSLv2 only
5634 * ciphersuites with a non-zero leading byte then we are going to
5635 * slightly over allocate because we won't store those. But that isn't a
5636 * problem.
5637 */
5638 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
5639 s->s3.tmp.ciphers_raw = raw;
5640 if (raw == NULL) {
5641 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
5642 return 0;
5643 }
5644 for (s->s3.tmp.ciphers_rawlen = 0;
5645 PACKET_remaining(&sslv2ciphers) > 0;
5646 raw += TLS_CIPHER_LEN) {
5647 if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
5648 || (leadbyte == 0
5649 && !PACKET_copy_bytes(&sslv2ciphers, raw,
5650 TLS_CIPHER_LEN))
5651 || (leadbyte != 0
5652 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
5653 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_PACKET);
5654 OPENSSL_free(s->s3.tmp.ciphers_raw);
5655 s->s3.tmp.ciphers_raw = NULL;
5656 s->s3.tmp.ciphers_rawlen = 0;
5657 return 0;
5658 }
5659 if (leadbyte == 0)
5660 s->s3.tmp.ciphers_rawlen += TLS_CIPHER_LEN;
5661 }
5662 } else if (!PACKET_memdup(cipher_suites, &s->s3.tmp.ciphers_raw,
5663 &s->s3.tmp.ciphers_rawlen)) {
5664 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
5665 return 0;
5666 }
5667 return 1;
5668 }
5669
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)5670 int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
5671 int isv2format, STACK_OF(SSL_CIPHER) **sk,
5672 STACK_OF(SSL_CIPHER) **scsvs)
5673 {
5674 PACKET pkt;
5675
5676 if (!PACKET_buf_init(&pkt, bytes, len))
5677 return 0;
5678 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0);
5679 }
5680
bytes_to_cipher_list(SSL * s,PACKET * cipher_suites,STACK_OF (SSL_CIPHER)** skp,STACK_OF (SSL_CIPHER)** scsvs_out,int sslv2format,int fatal)5681 int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
5682 STACK_OF(SSL_CIPHER) **skp,
5683 STACK_OF(SSL_CIPHER) **scsvs_out,
5684 int sslv2format, int fatal)
5685 {
5686 const SSL_CIPHER *c;
5687 STACK_OF(SSL_CIPHER) *sk = NULL;
5688 STACK_OF(SSL_CIPHER) *scsvs = NULL;
5689 int n;
5690 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
5691 unsigned char cipher[SSLV2_CIPHER_LEN];
5692
5693 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5694
5695 if (PACKET_remaining(cipher_suites) == 0) {
5696 if (fatal)
5697 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_R_NO_CIPHERS_SPECIFIED);
5698 else
5699 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHERS_SPECIFIED);
5700 return 0;
5701 }
5702
5703 if (PACKET_remaining(cipher_suites) % n != 0) {
5704 if (fatal)
5705 SSLfatal(s, SSL_AD_DECODE_ERROR,
5706 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5707 else
5708 ERR_raise(ERR_LIB_SSL, SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5709 return 0;
5710 }
5711
5712 sk = sk_SSL_CIPHER_new_null();
5713 scsvs = sk_SSL_CIPHER_new_null();
5714 if (sk == NULL || scsvs == NULL) {
5715 if (fatal)
5716 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
5717 else
5718 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
5719 goto err;
5720 }
5721
5722 while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
5723 /*
5724 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
5725 * first byte set to zero, while true SSLv2 ciphers have a non-zero
5726 * first byte. We don't support any true SSLv2 ciphers, so skip them.
5727 */
5728 if (sslv2format && cipher[0] != '\0')
5729 continue;
5730
5731 /* For SSLv2-compat, ignore leading 0-byte. */
5732 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
5733 if (c != NULL) {
5734 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
5735 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
5736 if (fatal)
5737 SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
5738 else
5739 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
5740 goto err;
5741 }
5742 }
5743 }
5744 if (PACKET_remaining(cipher_suites) > 0) {
5745 if (fatal)
5746 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_R_BAD_LENGTH);
5747 else
5748 ERR_raise(ERR_LIB_SSL, SSL_R_BAD_LENGTH);
5749 goto err;
5750 }
5751
5752 if (skp != NULL)
5753 *skp = sk;
5754 else
5755 sk_SSL_CIPHER_free(sk);
5756 if (scsvs_out != NULL)
5757 *scsvs_out = scsvs;
5758 else
5759 sk_SSL_CIPHER_free(scsvs);
5760 return 1;
5761 err:
5762 sk_SSL_CIPHER_free(sk);
5763 sk_SSL_CIPHER_free(scsvs);
5764 return 0;
5765 }
5766
SSL_CTX_set_max_early_data(SSL_CTX * ctx,uint32_t max_early_data)5767 int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
5768 {
5769 ctx->max_early_data = max_early_data;
5770
5771 return 1;
5772 }
5773
SSL_CTX_get_max_early_data(const SSL_CTX * ctx)5774 uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
5775 {
5776 return ctx->max_early_data;
5777 }
5778
SSL_set_max_early_data(SSL * s,uint32_t max_early_data)5779 int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
5780 {
5781 s->max_early_data = max_early_data;
5782
5783 return 1;
5784 }
5785
SSL_get_max_early_data(const SSL * s)5786 uint32_t SSL_get_max_early_data(const SSL *s)
5787 {
5788 return s->max_early_data;
5789 }
5790
SSL_CTX_set_recv_max_early_data(SSL_CTX * ctx,uint32_t recv_max_early_data)5791 int SSL_CTX_set_recv_max_early_data(SSL_CTX *ctx, uint32_t recv_max_early_data)
5792 {
5793 ctx->recv_max_early_data = recv_max_early_data;
5794
5795 return 1;
5796 }
5797
SSL_CTX_get_recv_max_early_data(const SSL_CTX * ctx)5798 uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX *ctx)
5799 {
5800 return ctx->recv_max_early_data;
5801 }
5802
SSL_set_recv_max_early_data(SSL * s,uint32_t recv_max_early_data)5803 int SSL_set_recv_max_early_data(SSL *s, uint32_t recv_max_early_data)
5804 {
5805 s->recv_max_early_data = recv_max_early_data;
5806
5807 return 1;
5808 }
5809
SSL_get_recv_max_early_data(const SSL * s)5810 uint32_t SSL_get_recv_max_early_data(const SSL *s)
5811 {
5812 return s->recv_max_early_data;
5813 }
5814
ssl_get_max_send_fragment(const SSL * ssl)5815 __owur unsigned int ssl_get_max_send_fragment(const SSL *ssl)
5816 {
5817 /* Return any active Max Fragment Len extension */
5818 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session))
5819 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5820
5821 /* return current SSL connection setting */
5822 return ssl->max_send_fragment;
5823 }
5824
ssl_get_split_send_fragment(const SSL * ssl)5825 __owur unsigned int ssl_get_split_send_fragment(const SSL *ssl)
5826 {
5827 /* Return a value regarding an active Max Fragment Len extension */
5828 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)
5829 && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session))
5830 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5831
5832 /* else limit |split_send_fragment| to current |max_send_fragment| */
5833 if (ssl->split_send_fragment > ssl->max_send_fragment)
5834 return ssl->max_send_fragment;
5835
5836 /* return current SSL connection setting */
5837 return ssl->split_send_fragment;
5838 }
5839
SSL_stateless(SSL * s)5840 int SSL_stateless(SSL *s)
5841 {
5842 int ret;
5843
5844 /* Ensure there is no state left over from a previous invocation */
5845 if (!SSL_clear(s))
5846 return 0;
5847
5848 ERR_clear_error();
5849
5850 s->s3.flags |= TLS1_FLAGS_STATELESS;
5851 ret = SSL_accept(s);
5852 s->s3.flags &= ~TLS1_FLAGS_STATELESS;
5853
5854 if (ret > 0 && s->ext.cookieok)
5855 return 1;
5856
5857 if (s->hello_retry_request == SSL_HRR_PENDING && !ossl_statem_in_error(s))
5858 return 0;
5859
5860 return -1;
5861 }
5862
SSL_CTX_set_post_handshake_auth(SSL_CTX * ctx,int val)5863 void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val)
5864 {
5865 ctx->pha_enabled = val;
5866 }
5867
SSL_set_post_handshake_auth(SSL * ssl,int val)5868 void SSL_set_post_handshake_auth(SSL *ssl, int val)
5869 {
5870 ssl->pha_enabled = val;
5871 }
5872
SSL_verify_client_post_handshake(SSL * ssl)5873 int SSL_verify_client_post_handshake(SSL *ssl)
5874 {
5875 if (!SSL_IS_TLS13(ssl)) {
5876 ERR_raise(ERR_LIB_SSL, SSL_R_WRONG_SSL_VERSION);
5877 return 0;
5878 }
5879 if (!ssl->server) {
5880 ERR_raise(ERR_LIB_SSL, SSL_R_NOT_SERVER);
5881 return 0;
5882 }
5883
5884 if (!SSL_is_init_finished(ssl)) {
5885 ERR_raise(ERR_LIB_SSL, SSL_R_STILL_IN_INIT);
5886 return 0;
5887 }
5888
5889 switch (ssl->post_handshake_auth) {
5890 case SSL_PHA_NONE:
5891 ERR_raise(ERR_LIB_SSL, SSL_R_EXTENSION_NOT_RECEIVED);
5892 return 0;
5893 default:
5894 case SSL_PHA_EXT_SENT:
5895 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
5896 return 0;
5897 case SSL_PHA_EXT_RECEIVED:
5898 break;
5899 case SSL_PHA_REQUEST_PENDING:
5900 ERR_raise(ERR_LIB_SSL, SSL_R_REQUEST_PENDING);
5901 return 0;
5902 case SSL_PHA_REQUESTED:
5903 ERR_raise(ERR_LIB_SSL, SSL_R_REQUEST_SENT);
5904 return 0;
5905 }
5906
5907 ssl->post_handshake_auth = SSL_PHA_REQUEST_PENDING;
5908
5909 /* checks verify_mode and algorithm_auth */
5910 if (!send_certificate_request(ssl)) {
5911 ssl->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */
5912 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_CONFIG);
5913 return 0;
5914 }
5915
5916 ossl_statem_set_in_init(ssl, 1);
5917 return 1;
5918 }
5919
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)5920 int SSL_CTX_set_session_ticket_cb(SSL_CTX *ctx,
5921 SSL_CTX_generate_session_ticket_fn gen_cb,
5922 SSL_CTX_decrypt_session_ticket_fn dec_cb,
5923 void *arg)
5924 {
5925 ctx->generate_ticket_cb = gen_cb;
5926 ctx->decrypt_ticket_cb = dec_cb;
5927 ctx->ticket_cb_data = arg;
5928 return 1;
5929 }
5930
SSL_CTX_set_allow_early_data_cb(SSL_CTX * ctx,SSL_allow_early_data_cb_fn cb,void * arg)5931 void SSL_CTX_set_allow_early_data_cb(SSL_CTX *ctx,
5932 SSL_allow_early_data_cb_fn cb,
5933 void *arg)
5934 {
5935 ctx->allow_early_data_cb = cb;
5936 ctx->allow_early_data_cb_data = arg;
5937 }
5938
SSL_set_allow_early_data_cb(SSL * s,SSL_allow_early_data_cb_fn cb,void * arg)5939 void SSL_set_allow_early_data_cb(SSL *s,
5940 SSL_allow_early_data_cb_fn cb,
5941 void *arg)
5942 {
5943 s->allow_early_data_cb = cb;
5944 s->allow_early_data_cb_data = arg;
5945 }
5946
ssl_evp_cipher_fetch(OSSL_LIB_CTX * libctx,int nid,const char * properties)5947 const EVP_CIPHER *ssl_evp_cipher_fetch(OSSL_LIB_CTX *libctx,
5948 int nid,
5949 const char *properties)
5950 {
5951 const EVP_CIPHER *ciph;
5952
5953 ciph = tls_get_cipher_from_engine(nid);
5954 if (ciph != NULL)
5955 return ciph;
5956
5957 /*
5958 * If there is no engine cipher then we do an explicit fetch. This may fail
5959 * and that could be ok
5960 */
5961 ERR_set_mark();
5962 ciph = EVP_CIPHER_fetch(libctx, OBJ_nid2sn(nid), properties);
5963 ERR_pop_to_mark();
5964 return ciph;
5965 }
5966
5967
ssl_evp_cipher_up_ref(const EVP_CIPHER * cipher)5968 int ssl_evp_cipher_up_ref(const EVP_CIPHER *cipher)
5969 {
5970 /* Don't up-ref an implicit EVP_CIPHER */
5971 if (EVP_CIPHER_get0_provider(cipher) == NULL)
5972 return 1;
5973
5974 /*
5975 * The cipher was explicitly fetched and therefore it is safe to cast
5976 * away the const
5977 */
5978 return EVP_CIPHER_up_ref((EVP_CIPHER *)cipher);
5979 }
5980
ssl_evp_cipher_free(const EVP_CIPHER * cipher)5981 void ssl_evp_cipher_free(const EVP_CIPHER *cipher)
5982 {
5983 if (cipher == NULL)
5984 return;
5985
5986 if (EVP_CIPHER_get0_provider(cipher) != NULL) {
5987 /*
5988 * The cipher was explicitly fetched and therefore it is safe to cast
5989 * away the const
5990 */
5991 EVP_CIPHER_free((EVP_CIPHER *)cipher);
5992 }
5993 }
5994
ssl_evp_md_fetch(OSSL_LIB_CTX * libctx,int nid,const char * properties)5995 const EVP_MD *ssl_evp_md_fetch(OSSL_LIB_CTX *libctx,
5996 int nid,
5997 const char *properties)
5998 {
5999 const EVP_MD *md;
6000
6001 md = tls_get_digest_from_engine(nid);
6002 if (md != NULL)
6003 return md;
6004
6005 /* Otherwise we do an explicit fetch */
6006 ERR_set_mark();
6007 md = EVP_MD_fetch(libctx, OBJ_nid2sn(nid), properties);
6008 ERR_pop_to_mark();
6009 return md;
6010 }
6011
ssl_evp_md_up_ref(const EVP_MD * md)6012 int ssl_evp_md_up_ref(const EVP_MD *md)
6013 {
6014 /* Don't up-ref an implicit EVP_MD */
6015 if (EVP_MD_get0_provider(md) == NULL)
6016 return 1;
6017
6018 /*
6019 * The digest was explicitly fetched and therefore it is safe to cast
6020 * away the const
6021 */
6022 return EVP_MD_up_ref((EVP_MD *)md);
6023 }
6024
ssl_evp_md_free(const EVP_MD * md)6025 void ssl_evp_md_free(const EVP_MD *md)
6026 {
6027 if (md == NULL)
6028 return;
6029
6030 if (EVP_MD_get0_provider(md) != NULL) {
6031 /*
6032 * The digest was explicitly fetched and therefore it is safe to cast
6033 * away the const
6034 */
6035 EVP_MD_free((EVP_MD *)md);
6036 }
6037 }
6038
SSL_set0_tmp_dh_pkey(SSL * s,EVP_PKEY * dhpkey)6039 int SSL_set0_tmp_dh_pkey(SSL *s, EVP_PKEY *dhpkey)
6040 {
6041 if (!ssl_security(s, SSL_SECOP_TMP_DH,
6042 EVP_PKEY_get_security_bits(dhpkey), 0, dhpkey)) {
6043 ERR_raise(ERR_LIB_SSL, SSL_R_DH_KEY_TOO_SMALL);
6044 return 0;
6045 }
6046 EVP_PKEY_free(s->cert->dh_tmp);
6047 s->cert->dh_tmp = dhpkey;
6048 return 1;
6049 }
6050
SSL_CTX_set0_tmp_dh_pkey(SSL_CTX * ctx,EVP_PKEY * dhpkey)6051 int SSL_CTX_set0_tmp_dh_pkey(SSL_CTX *ctx, EVP_PKEY *dhpkey)
6052 {
6053 if (!ssl_ctx_security(ctx, SSL_SECOP_TMP_DH,
6054 EVP_PKEY_get_security_bits(dhpkey), 0, dhpkey)) {
6055 ERR_raise(ERR_LIB_SSL, SSL_R_DH_KEY_TOO_SMALL);
6056 return 0;
6057 }
6058 EVP_PKEY_free(ctx->cert->dh_tmp);
6059 ctx->cert->dh_tmp = dhpkey;
6060 return 1;
6061 }
6062