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