1 /*
2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 * Copyright 2005 Nokia. All rights reserved.
5 *
6 * Licensed under the OpenSSL license (the "License"). You may not use
7 * this file except in compliance with the License. You can obtain a copy
8 * in the file LICENSE in the source distribution or at
9 * https://www.openssl.org/source/license.html
10 */
11
12 #include <stdio.h>
13 #include "ssl_local.h"
14 #include <openssl/objects.h>
15 #include <openssl/x509v3.h>
16 #include <openssl/rand.h>
17 #include <openssl/rand_drbg.h>
18 #include <openssl/ocsp.h>
19 #include <openssl/dh.h>
20 #include <openssl/engine.h>
21 #include <openssl/async.h>
22 #include <openssl/ct.h>
23 #include "internal/cryptlib.h"
24 #include "internal/refcount.h"
25
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 /* Clear any shared connection state */
632 OPENSSL_free(s->shared_sigalgs);
633 s->shared_sigalgs = NULL;
634 s->shared_sigalgslen = 0;
635
636 /*
637 * Check to see if we were changed into a different method, if so, revert
638 * back.
639 */
640 if (s->method != s->ctx->method) {
641 s->method->ssl_free(s);
642 s->method = s->ctx->method;
643 if (!s->method->ssl_new(s))
644 return 0;
645 } else {
646 if (!s->method->ssl_clear(s))
647 return 0;
648 }
649
650 RECORD_LAYER_clear(&s->rlayer);
651
652 return 1;
653 }
654
655 /** Used to change an SSL_CTXs default SSL method type */
SSL_CTX_set_ssl_version(SSL_CTX * ctx,const SSL_METHOD * meth)656 int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
657 {
658 STACK_OF(SSL_CIPHER) *sk;
659
660 ctx->method = meth;
661
662 if (!SSL_CTX_set_ciphersuites(ctx, TLS_DEFAULT_CIPHERSUITES)) {
663 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
664 return 0;
665 }
666 sk = ssl_create_cipher_list(ctx->method,
667 ctx->tls13_ciphersuites,
668 &(ctx->cipher_list),
669 &(ctx->cipher_list_by_id),
670 SSL_DEFAULT_CIPHER_LIST, ctx->cert);
671 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
672 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
673 return 0;
674 }
675 return 1;
676 }
677
SSL_new(SSL_CTX * ctx)678 SSL *SSL_new(SSL_CTX *ctx)
679 {
680 SSL *s;
681
682 if (ctx == NULL) {
683 SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX);
684 return NULL;
685 }
686 if (ctx->method == NULL) {
687 SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
688 return NULL;
689 }
690
691 s = OPENSSL_zalloc(sizeof(*s));
692 if (s == NULL)
693 goto err;
694
695 s->references = 1;
696 s->lock = CRYPTO_THREAD_lock_new();
697 if (s->lock == NULL) {
698 OPENSSL_free(s);
699 s = NULL;
700 goto err;
701 }
702
703 RECORD_LAYER_init(&s->rlayer, s);
704
705 s->options = ctx->options;
706 s->dane.flags = ctx->dane.flags;
707 s->min_proto_version = ctx->min_proto_version;
708 s->max_proto_version = ctx->max_proto_version;
709 s->mode = ctx->mode;
710 s->max_cert_list = ctx->max_cert_list;
711 s->max_early_data = ctx->max_early_data;
712 s->recv_max_early_data = ctx->recv_max_early_data;
713 s->num_tickets = ctx->num_tickets;
714 s->pha_enabled = ctx->pha_enabled;
715
716 /* Shallow copy of the ciphersuites stack */
717 s->tls13_ciphersuites = sk_SSL_CIPHER_dup(ctx->tls13_ciphersuites);
718 if (s->tls13_ciphersuites == NULL)
719 goto err;
720
721 /*
722 * Earlier library versions used to copy the pointer to the CERT, not
723 * its contents; only when setting new parameters for the per-SSL
724 * copy, ssl_cert_new would be called (and the direct reference to
725 * the per-SSL_CTX settings would be lost, but those still were
726 * indirectly accessed for various purposes, and for that reason they
727 * used to be known as s->ctx->default_cert). Now we don't look at the
728 * SSL_CTX's CERT after having duplicated it once.
729 */
730 s->cert = ssl_cert_dup(ctx->cert);
731 if (s->cert == NULL)
732 goto err;
733
734 RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
735 s->msg_callback = ctx->msg_callback;
736 s->msg_callback_arg = ctx->msg_callback_arg;
737 s->verify_mode = ctx->verify_mode;
738 s->not_resumable_session_cb = ctx->not_resumable_session_cb;
739 s->record_padding_cb = ctx->record_padding_cb;
740 s->record_padding_arg = ctx->record_padding_arg;
741 s->block_padding = ctx->block_padding;
742 s->sid_ctx_length = ctx->sid_ctx_length;
743 if (!ossl_assert(s->sid_ctx_length <= sizeof(s->sid_ctx)))
744 goto err;
745 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
746 s->verify_callback = ctx->default_verify_callback;
747 s->generate_session_id = ctx->generate_session_id;
748
749 s->param = X509_VERIFY_PARAM_new();
750 if (s->param == NULL)
751 goto err;
752 X509_VERIFY_PARAM_inherit(s->param, ctx->param);
753 s->quiet_shutdown = ctx->quiet_shutdown;
754
755 s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode;
756 s->max_send_fragment = ctx->max_send_fragment;
757 s->split_send_fragment = ctx->split_send_fragment;
758 s->max_pipelines = ctx->max_pipelines;
759 if (s->max_pipelines > 1)
760 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
761 if (ctx->default_read_buf_len > 0)
762 SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len);
763
764 SSL_CTX_up_ref(ctx);
765 s->ctx = ctx;
766 s->ext.debug_cb = 0;
767 s->ext.debug_arg = NULL;
768 s->ext.ticket_expected = 0;
769 s->ext.status_type = ctx->ext.status_type;
770 s->ext.status_expected = 0;
771 s->ext.ocsp.ids = NULL;
772 s->ext.ocsp.exts = NULL;
773 s->ext.ocsp.resp = NULL;
774 s->ext.ocsp.resp_len = 0;
775 SSL_CTX_up_ref(ctx);
776 s->session_ctx = ctx;
777 #ifndef OPENSSL_NO_EC
778 if (ctx->ext.ecpointformats) {
779 s->ext.ecpointformats =
780 OPENSSL_memdup(ctx->ext.ecpointformats,
781 ctx->ext.ecpointformats_len);
782 if (!s->ext.ecpointformats) {
783 s->ext.ecpointformats_len = 0;
784 goto err;
785 }
786 s->ext.ecpointformats_len =
787 ctx->ext.ecpointformats_len;
788 }
789 if (ctx->ext.supportedgroups) {
790 s->ext.supportedgroups =
791 OPENSSL_memdup(ctx->ext.supportedgroups,
792 ctx->ext.supportedgroups_len
793 * sizeof(*ctx->ext.supportedgroups));
794 if (!s->ext.supportedgroups) {
795 s->ext.supportedgroups_len = 0;
796 goto err;
797 }
798 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
799 }
800 #endif
801 #ifndef OPENSSL_NO_NEXTPROTONEG
802 s->ext.npn = NULL;
803 #endif
804
805 if (s->ctx->ext.alpn) {
806 s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
807 if (s->ext.alpn == NULL) {
808 s->ext.alpn_len = 0;
809 goto err;
810 }
811 memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
812 s->ext.alpn_len = s->ctx->ext.alpn_len;
813 }
814
815 s->verified_chain = NULL;
816 s->verify_result = X509_V_OK;
817
818 s->default_passwd_callback = ctx->default_passwd_callback;
819 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
820
821 s->method = ctx->method;
822
823 s->key_update = SSL_KEY_UPDATE_NONE;
824
825 s->allow_early_data_cb = ctx->allow_early_data_cb;
826 s->allow_early_data_cb_data = ctx->allow_early_data_cb_data;
827
828 if (!s->method->ssl_new(s))
829 goto err;
830
831 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
832
833 if (!SSL_clear(s))
834 goto err;
835
836 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
837 goto err;
838
839 #ifndef OPENSSL_NO_PSK
840 s->psk_client_callback = ctx->psk_client_callback;
841 s->psk_server_callback = ctx->psk_server_callback;
842 #endif
843 s->psk_find_session_cb = ctx->psk_find_session_cb;
844 s->psk_use_session_cb = ctx->psk_use_session_cb;
845
846 s->job = NULL;
847
848 #ifndef OPENSSL_NO_CT
849 if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
850 ctx->ct_validation_callback_arg))
851 goto err;
852 #endif
853
854 return s;
855 err:
856 SSL_free(s);
857 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
858 return NULL;
859 }
860
SSL_is_dtls(const SSL * s)861 int SSL_is_dtls(const SSL *s)
862 {
863 return SSL_IS_DTLS(s) ? 1 : 0;
864 }
865
SSL_up_ref(SSL * s)866 int SSL_up_ref(SSL *s)
867 {
868 int i;
869
870 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
871 return 0;
872
873 REF_PRINT_COUNT("SSL", s);
874 REF_ASSERT_ISNT(i < 2);
875 return ((i > 1) ? 1 : 0);
876 }
877
SSL_CTX_set_session_id_context(SSL_CTX * ctx,const unsigned char * sid_ctx,unsigned int sid_ctx_len)878 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
879 unsigned int sid_ctx_len)
880 {
881 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
882 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
883 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
884 return 0;
885 }
886 ctx->sid_ctx_length = sid_ctx_len;
887 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
888
889 return 1;
890 }
891
SSL_set_session_id_context(SSL * ssl,const unsigned char * sid_ctx,unsigned int sid_ctx_len)892 int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
893 unsigned int sid_ctx_len)
894 {
895 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
896 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
897 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
898 return 0;
899 }
900 ssl->sid_ctx_length = sid_ctx_len;
901 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
902
903 return 1;
904 }
905
SSL_CTX_set_generate_session_id(SSL_CTX * ctx,GEN_SESSION_CB cb)906 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
907 {
908 CRYPTO_THREAD_write_lock(ctx->lock);
909 ctx->generate_session_id = cb;
910 CRYPTO_THREAD_unlock(ctx->lock);
911 return 1;
912 }
913
SSL_set_generate_session_id(SSL * ssl,GEN_SESSION_CB cb)914 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
915 {
916 CRYPTO_THREAD_write_lock(ssl->lock);
917 ssl->generate_session_id = cb;
918 CRYPTO_THREAD_unlock(ssl->lock);
919 return 1;
920 }
921
SSL_has_matching_session_id(const SSL * ssl,const unsigned char * id,unsigned int id_len)922 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
923 unsigned int id_len)
924 {
925 /*
926 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
927 * we can "construct" a session to give us the desired check - i.e. to
928 * find if there's a session in the hash table that would conflict with
929 * any new session built out of this id/id_len and the ssl_version in use
930 * by this SSL.
931 */
932 SSL_SESSION r, *p;
933
934 if (id_len > sizeof(r.session_id))
935 return 0;
936
937 r.ssl_version = ssl->version;
938 r.session_id_length = id_len;
939 memcpy(r.session_id, id, id_len);
940
941 CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
942 p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
943 CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
944 return (p != NULL);
945 }
946
SSL_CTX_set_purpose(SSL_CTX * s,int purpose)947 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
948 {
949 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
950 }
951
SSL_set_purpose(SSL * s,int purpose)952 int SSL_set_purpose(SSL *s, int purpose)
953 {
954 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
955 }
956
SSL_CTX_set_trust(SSL_CTX * s,int trust)957 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
958 {
959 return X509_VERIFY_PARAM_set_trust(s->param, trust);
960 }
961
SSL_set_trust(SSL * s,int trust)962 int SSL_set_trust(SSL *s, int trust)
963 {
964 return X509_VERIFY_PARAM_set_trust(s->param, trust);
965 }
966
SSL_set1_host(SSL * s,const char * hostname)967 int SSL_set1_host(SSL *s, const char *hostname)
968 {
969 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
970 }
971
SSL_add1_host(SSL * s,const char * hostname)972 int SSL_add1_host(SSL *s, const char *hostname)
973 {
974 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
975 }
976
SSL_set_hostflags(SSL * s,unsigned int flags)977 void SSL_set_hostflags(SSL *s, unsigned int flags)
978 {
979 X509_VERIFY_PARAM_set_hostflags(s->param, flags);
980 }
981
SSL_get0_peername(SSL * s)982 const char *SSL_get0_peername(SSL *s)
983 {
984 return X509_VERIFY_PARAM_get0_peername(s->param);
985 }
986
SSL_CTX_dane_enable(SSL_CTX * ctx)987 int SSL_CTX_dane_enable(SSL_CTX *ctx)
988 {
989 return dane_ctx_enable(&ctx->dane);
990 }
991
SSL_CTX_dane_set_flags(SSL_CTX * ctx,unsigned long flags)992 unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
993 {
994 unsigned long orig = ctx->dane.flags;
995
996 ctx->dane.flags |= flags;
997 return orig;
998 }
999
SSL_CTX_dane_clear_flags(SSL_CTX * ctx,unsigned long flags)1000 unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
1001 {
1002 unsigned long orig = ctx->dane.flags;
1003
1004 ctx->dane.flags &= ~flags;
1005 return orig;
1006 }
1007
SSL_dane_enable(SSL * s,const char * basedomain)1008 int SSL_dane_enable(SSL *s, const char *basedomain)
1009 {
1010 SSL_DANE *dane = &s->dane;
1011
1012 if (s->ctx->dane.mdmax == 0) {
1013 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED);
1014 return 0;
1015 }
1016 if (dane->trecs != NULL) {
1017 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED);
1018 return 0;
1019 }
1020
1021 /*
1022 * Default SNI name. This rejects empty names, while set1_host below
1023 * accepts them and disables host name checks. To avoid side-effects with
1024 * invalid input, set the SNI name first.
1025 */
1026 if (s->ext.hostname == NULL) {
1027 if (!SSL_set_tlsext_host_name(s, basedomain)) {
1028 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1029 return -1;
1030 }
1031 }
1032
1033 /* Primary RFC6125 reference identifier */
1034 if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
1035 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1036 return -1;
1037 }
1038
1039 dane->mdpth = -1;
1040 dane->pdpth = -1;
1041 dane->dctx = &s->ctx->dane;
1042 dane->trecs = sk_danetls_record_new_null();
1043
1044 if (dane->trecs == NULL) {
1045 SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE);
1046 return -1;
1047 }
1048 return 1;
1049 }
1050
SSL_dane_set_flags(SSL * ssl,unsigned long flags)1051 unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
1052 {
1053 unsigned long orig = ssl->dane.flags;
1054
1055 ssl->dane.flags |= flags;
1056 return orig;
1057 }
1058
SSL_dane_clear_flags(SSL * ssl,unsigned long flags)1059 unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
1060 {
1061 unsigned long orig = ssl->dane.flags;
1062
1063 ssl->dane.flags &= ~flags;
1064 return orig;
1065 }
1066
SSL_get0_dane_authority(SSL * s,X509 ** mcert,EVP_PKEY ** mspki)1067 int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
1068 {
1069 SSL_DANE *dane = &s->dane;
1070
1071 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1072 return -1;
1073 if (dane->mtlsa) {
1074 if (mcert)
1075 *mcert = dane->mcert;
1076 if (mspki)
1077 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
1078 }
1079 return dane->mdpth;
1080 }
1081
SSL_get0_dane_tlsa(SSL * s,uint8_t * usage,uint8_t * selector,uint8_t * mtype,unsigned const char ** data,size_t * dlen)1082 int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
1083 uint8_t *mtype, unsigned const char **data, size_t *dlen)
1084 {
1085 SSL_DANE *dane = &s->dane;
1086
1087 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1088 return -1;
1089 if (dane->mtlsa) {
1090 if (usage)
1091 *usage = dane->mtlsa->usage;
1092 if (selector)
1093 *selector = dane->mtlsa->selector;
1094 if (mtype)
1095 *mtype = dane->mtlsa->mtype;
1096 if (data)
1097 *data = dane->mtlsa->data;
1098 if (dlen)
1099 *dlen = dane->mtlsa->dlen;
1100 }
1101 return dane->mdpth;
1102 }
1103
SSL_get0_dane(SSL * s)1104 SSL_DANE *SSL_get0_dane(SSL *s)
1105 {
1106 return &s->dane;
1107 }
1108
SSL_dane_tlsa_add(SSL * s,uint8_t usage,uint8_t selector,uint8_t mtype,unsigned const char * data,size_t dlen)1109 int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
1110 uint8_t mtype, unsigned const char *data, size_t dlen)
1111 {
1112 return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen);
1113 }
1114
SSL_CTX_dane_mtype_set(SSL_CTX * ctx,const EVP_MD * md,uint8_t mtype,uint8_t ord)1115 int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
1116 uint8_t ord)
1117 {
1118 return dane_mtype_set(&ctx->dane, md, mtype, ord);
1119 }
1120
SSL_CTX_set1_param(SSL_CTX * ctx,X509_VERIFY_PARAM * vpm)1121 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
1122 {
1123 return X509_VERIFY_PARAM_set1(ctx->param, vpm);
1124 }
1125
SSL_set1_param(SSL * ssl,X509_VERIFY_PARAM * vpm)1126 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
1127 {
1128 return X509_VERIFY_PARAM_set1(ssl->param, vpm);
1129 }
1130
SSL_CTX_get0_param(SSL_CTX * ctx)1131 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
1132 {
1133 return ctx->param;
1134 }
1135
SSL_get0_param(SSL * ssl)1136 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
1137 {
1138 return ssl->param;
1139 }
1140
SSL_certs_clear(SSL * s)1141 void SSL_certs_clear(SSL *s)
1142 {
1143 ssl_cert_clear_certs(s->cert);
1144 }
1145
SSL_free(SSL * s)1146 void SSL_free(SSL *s)
1147 {
1148 int i;
1149
1150 if (s == NULL)
1151 return;
1152 CRYPTO_DOWN_REF(&s->references, &i, s->lock);
1153 REF_PRINT_COUNT("SSL", s);
1154 if (i > 0)
1155 return;
1156 REF_ASSERT_ISNT(i < 0);
1157
1158 X509_VERIFY_PARAM_free(s->param);
1159 dane_final(&s->dane);
1160 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
1161
1162 /* Ignore return value */
1163 ssl_free_wbio_buffer(s);
1164
1165 BIO_free_all(s->wbio);
1166 BIO_free_all(s->rbio);
1167
1168 BUF_MEM_free(s->init_buf);
1169
1170 /* add extra stuff */
1171 sk_SSL_CIPHER_free(s->cipher_list);
1172 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1173 sk_SSL_CIPHER_free(s->tls13_ciphersuites);
1174 sk_SSL_CIPHER_free(s->peer_ciphers);
1175
1176 /* Make the next call work :-) */
1177 if (s->session != NULL) {
1178 ssl_clear_bad_session(s);
1179 SSL_SESSION_free(s->session);
1180 }
1181 SSL_SESSION_free(s->psksession);
1182 OPENSSL_free(s->psksession_id);
1183
1184 clear_ciphers(s);
1185
1186 ssl_cert_free(s->cert);
1187 OPENSSL_free(s->shared_sigalgs);
1188 /* Free up if allocated */
1189
1190 OPENSSL_free(s->ext.hostname);
1191 SSL_CTX_free(s->session_ctx);
1192 #ifndef OPENSSL_NO_EC
1193 OPENSSL_free(s->ext.ecpointformats);
1194 OPENSSL_free(s->ext.peer_ecpointformats);
1195 OPENSSL_free(s->ext.supportedgroups);
1196 OPENSSL_free(s->ext.peer_supportedgroups);
1197 #endif /* OPENSSL_NO_EC */
1198 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
1199 #ifndef OPENSSL_NO_OCSP
1200 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
1201 #endif
1202 #ifndef OPENSSL_NO_CT
1203 SCT_LIST_free(s->scts);
1204 OPENSSL_free(s->ext.scts);
1205 #endif
1206 OPENSSL_free(s->ext.ocsp.resp);
1207 OPENSSL_free(s->ext.alpn);
1208 OPENSSL_free(s->ext.tls13_cookie);
1209 if (s->clienthello != NULL)
1210 OPENSSL_free(s->clienthello->pre_proc_exts);
1211 OPENSSL_free(s->clienthello);
1212 OPENSSL_free(s->pha_context);
1213 EVP_MD_CTX_free(s->pha_dgst);
1214
1215 sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free);
1216 sk_X509_NAME_pop_free(s->client_ca_names, X509_NAME_free);
1217
1218 sk_X509_pop_free(s->verified_chain, X509_free);
1219
1220 if (s->method != NULL)
1221 s->method->ssl_free(s);
1222
1223 RECORD_LAYER_release(&s->rlayer);
1224
1225 SSL_CTX_free(s->ctx);
1226
1227 ASYNC_WAIT_CTX_free(s->waitctx);
1228
1229 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1230 OPENSSL_free(s->ext.npn);
1231 #endif
1232
1233 #ifndef OPENSSL_NO_SRTP
1234 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
1235 #endif
1236
1237 CRYPTO_THREAD_lock_free(s->lock);
1238
1239 OPENSSL_free(s);
1240 }
1241
SSL_set0_rbio(SSL * s,BIO * rbio)1242 void SSL_set0_rbio(SSL *s, BIO *rbio)
1243 {
1244 BIO_free_all(s->rbio);
1245 s->rbio = rbio;
1246 }
1247
SSL_set0_wbio(SSL * s,BIO * wbio)1248 void SSL_set0_wbio(SSL *s, BIO *wbio)
1249 {
1250 /*
1251 * If the output buffering BIO is still in place, remove it
1252 */
1253 if (s->bbio != NULL)
1254 s->wbio = BIO_pop(s->wbio);
1255
1256 BIO_free_all(s->wbio);
1257 s->wbio = wbio;
1258
1259 /* Re-attach |bbio| to the new |wbio|. */
1260 if (s->bbio != NULL)
1261 s->wbio = BIO_push(s->bbio, s->wbio);
1262 }
1263
SSL_set_bio(SSL * s,BIO * rbio,BIO * wbio)1264 void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
1265 {
1266 /*
1267 * For historical reasons, this function has many different cases in
1268 * ownership handling.
1269 */
1270
1271 /* If nothing has changed, do nothing */
1272 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
1273 return;
1274
1275 /*
1276 * If the two arguments are equal then one fewer reference is granted by the
1277 * caller than we want to take
1278 */
1279 if (rbio != NULL && rbio == wbio)
1280 BIO_up_ref(rbio);
1281
1282 /*
1283 * If only the wbio is changed only adopt one reference.
1284 */
1285 if (rbio == SSL_get_rbio(s)) {
1286 SSL_set0_wbio(s, wbio);
1287 return;
1288 }
1289 /*
1290 * There is an asymmetry here for historical reasons. If only the rbio is
1291 * changed AND the rbio and wbio were originally different, then we only
1292 * adopt one reference.
1293 */
1294 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
1295 SSL_set0_rbio(s, rbio);
1296 return;
1297 }
1298
1299 /* Otherwise, adopt both references. */
1300 SSL_set0_rbio(s, rbio);
1301 SSL_set0_wbio(s, wbio);
1302 }
1303
SSL_get_rbio(const SSL * s)1304 BIO *SSL_get_rbio(const SSL *s)
1305 {
1306 return s->rbio;
1307 }
1308
SSL_get_wbio(const SSL * s)1309 BIO *SSL_get_wbio(const SSL *s)
1310 {
1311 if (s->bbio != NULL) {
1312 /*
1313 * If |bbio| is active, the true caller-configured BIO is its
1314 * |next_bio|.
1315 */
1316 return BIO_next(s->bbio);
1317 }
1318 return s->wbio;
1319 }
1320
SSL_get_fd(const SSL * s)1321 int SSL_get_fd(const SSL *s)
1322 {
1323 return SSL_get_rfd(s);
1324 }
1325
SSL_get_rfd(const SSL * s)1326 int SSL_get_rfd(const SSL *s)
1327 {
1328 int ret = -1;
1329 BIO *b, *r;
1330
1331 b = SSL_get_rbio(s);
1332 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1333 if (r != NULL)
1334 BIO_get_fd(r, &ret);
1335 return ret;
1336 }
1337
SSL_get_wfd(const SSL * s)1338 int SSL_get_wfd(const SSL *s)
1339 {
1340 int ret = -1;
1341 BIO *b, *r;
1342
1343 b = SSL_get_wbio(s);
1344 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1345 if (r != NULL)
1346 BIO_get_fd(r, &ret);
1347 return ret;
1348 }
1349
1350 #ifndef OPENSSL_NO_SOCK
SSL_set_fd(SSL * s,int fd)1351 int SSL_set_fd(SSL *s, int fd)
1352 {
1353 int ret = 0;
1354 BIO *bio = NULL;
1355
1356 bio = BIO_new(BIO_s_socket());
1357
1358 if (bio == NULL) {
1359 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
1360 goto err;
1361 }
1362 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1363 SSL_set_bio(s, bio, bio);
1364 ret = 1;
1365 err:
1366 return ret;
1367 }
1368
SSL_set_wfd(SSL * s,int fd)1369 int SSL_set_wfd(SSL *s, int fd)
1370 {
1371 BIO *rbio = SSL_get_rbio(s);
1372
1373 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
1374 || (int)BIO_get_fd(rbio, NULL) != fd) {
1375 BIO *bio = BIO_new(BIO_s_socket());
1376
1377 if (bio == NULL) {
1378 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB);
1379 return 0;
1380 }
1381 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1382 SSL_set0_wbio(s, bio);
1383 } else {
1384 BIO_up_ref(rbio);
1385 SSL_set0_wbio(s, rbio);
1386 }
1387 return 1;
1388 }
1389
SSL_set_rfd(SSL * s,int fd)1390 int SSL_set_rfd(SSL *s, int fd)
1391 {
1392 BIO *wbio = SSL_get_wbio(s);
1393
1394 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
1395 || ((int)BIO_get_fd(wbio, NULL) != fd)) {
1396 BIO *bio = BIO_new(BIO_s_socket());
1397
1398 if (bio == NULL) {
1399 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB);
1400 return 0;
1401 }
1402 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1403 SSL_set0_rbio(s, bio);
1404 } else {
1405 BIO_up_ref(wbio);
1406 SSL_set0_rbio(s, wbio);
1407 }
1408
1409 return 1;
1410 }
1411 #endif
1412
1413 /* return length of latest Finished message we sent, copy to 'buf' */
SSL_get_finished(const SSL * s,void * buf,size_t count)1414 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
1415 {
1416 size_t ret = 0;
1417
1418 if (s->s3 != NULL) {
1419 ret = s->s3->tmp.finish_md_len;
1420 if (count > ret)
1421 count = ret;
1422 memcpy(buf, s->s3->tmp.finish_md, count);
1423 }
1424 return ret;
1425 }
1426
1427 /* return length of latest Finished message we expected, copy to 'buf' */
SSL_get_peer_finished(const SSL * s,void * buf,size_t count)1428 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
1429 {
1430 size_t ret = 0;
1431
1432 if (s->s3 != NULL) {
1433 ret = s->s3->tmp.peer_finish_md_len;
1434 if (count > ret)
1435 count = ret;
1436 memcpy(buf, s->s3->tmp.peer_finish_md, count);
1437 }
1438 return ret;
1439 }
1440
SSL_get_verify_mode(const SSL * s)1441 int SSL_get_verify_mode(const SSL *s)
1442 {
1443 return s->verify_mode;
1444 }
1445
SSL_get_verify_depth(const SSL * s)1446 int SSL_get_verify_depth(const SSL *s)
1447 {
1448 return X509_VERIFY_PARAM_get_depth(s->param);
1449 }
1450
SSL_get_verify_callback(const SSL * s)1451 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
1452 return s->verify_callback;
1453 }
1454
SSL_CTX_get_verify_mode(const SSL_CTX * ctx)1455 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
1456 {
1457 return ctx->verify_mode;
1458 }
1459
SSL_CTX_get_verify_depth(const SSL_CTX * ctx)1460 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
1461 {
1462 return X509_VERIFY_PARAM_get_depth(ctx->param);
1463 }
1464
SSL_CTX_get_verify_callback(const SSL_CTX * ctx)1465 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
1466 return ctx->default_verify_callback;
1467 }
1468
SSL_set_verify(SSL * s,int mode,int (* callback)(int ok,X509_STORE_CTX * ctx))1469 void SSL_set_verify(SSL *s, int mode,
1470 int (*callback) (int ok, X509_STORE_CTX *ctx))
1471 {
1472 s->verify_mode = mode;
1473 if (callback != NULL)
1474 s->verify_callback = callback;
1475 }
1476
SSL_set_verify_depth(SSL * s,int depth)1477 void SSL_set_verify_depth(SSL *s, int depth)
1478 {
1479 X509_VERIFY_PARAM_set_depth(s->param, depth);
1480 }
1481
SSL_set_read_ahead(SSL * s,int yes)1482 void SSL_set_read_ahead(SSL *s, int yes)
1483 {
1484 RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
1485 }
1486
SSL_get_read_ahead(const SSL * s)1487 int SSL_get_read_ahead(const SSL *s)
1488 {
1489 return RECORD_LAYER_get_read_ahead(&s->rlayer);
1490 }
1491
SSL_pending(const SSL * s)1492 int SSL_pending(const SSL *s)
1493 {
1494 size_t pending = s->method->ssl_pending(s);
1495
1496 /*
1497 * SSL_pending cannot work properly if read-ahead is enabled
1498 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
1499 * impossible to fix since SSL_pending cannot report errors that may be
1500 * observed while scanning the new data. (Note that SSL_pending() is
1501 * often used as a boolean value, so we'd better not return -1.)
1502 *
1503 * SSL_pending also cannot work properly if the value >INT_MAX. In that case
1504 * we just return INT_MAX.
1505 */
1506 return pending < INT_MAX ? (int)pending : INT_MAX;
1507 }
1508
SSL_has_pending(const SSL * s)1509 int SSL_has_pending(const SSL *s)
1510 {
1511 /*
1512 * Similar to SSL_pending() but returns a 1 to indicate that we have
1513 * processed or unprocessed data available or 0 otherwise (as opposed to the
1514 * number of bytes available). Unlike SSL_pending() this will take into
1515 * account read_ahead data. A 1 return simply indicates that we have data.
1516 * That data may not result in any application data, or we may fail to parse
1517 * the records for some reason.
1518 */
1519
1520 /* Check buffered app data if any first */
1521 if (SSL_IS_DTLS(s)) {
1522 DTLS1_RECORD_DATA *rdata;
1523 pitem *item, *iter;
1524
1525 iter = pqueue_iterator(s->rlayer.d->buffered_app_data.q);
1526 while ((item = pqueue_next(&iter)) != NULL) {
1527 rdata = item->data;
1528 if (rdata->rrec.length > 0)
1529 return 1;
1530 }
1531 }
1532
1533 if (RECORD_LAYER_processed_read_pending(&s->rlayer))
1534 return 1;
1535
1536 return RECORD_LAYER_read_pending(&s->rlayer);
1537 }
1538
SSL_get_peer_certificate(const SSL * s)1539 X509 *SSL_get_peer_certificate(const SSL *s)
1540 {
1541 X509 *r;
1542
1543 if ((s == NULL) || (s->session == NULL))
1544 r = NULL;
1545 else
1546 r = s->session->peer;
1547
1548 if (r == NULL)
1549 return r;
1550
1551 X509_up_ref(r);
1552
1553 return r;
1554 }
1555
STACK_OF(X509)1556 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
1557 {
1558 STACK_OF(X509) *r;
1559
1560 if ((s == NULL) || (s->session == NULL))
1561 r = NULL;
1562 else
1563 r = s->session->peer_chain;
1564
1565 /*
1566 * If we are a client, cert_chain includes the peer's own certificate; if
1567 * we are a server, it does not.
1568 */
1569
1570 return r;
1571 }
1572
1573 /*
1574 * Now in theory, since the calling process own 't' it should be safe to
1575 * modify. We need to be able to read f without being hassled
1576 */
SSL_copy_session_id(SSL * t,const SSL * f)1577 int SSL_copy_session_id(SSL *t, const SSL *f)
1578 {
1579 int i;
1580 /* Do we need to to SSL locking? */
1581 if (!SSL_set_session(t, SSL_get_session(f))) {
1582 return 0;
1583 }
1584
1585 /*
1586 * what if we are setup for one protocol version but want to talk another
1587 */
1588 if (t->method != f->method) {
1589 t->method->ssl_free(t);
1590 t->method = f->method;
1591 if (t->method->ssl_new(t) == 0)
1592 return 0;
1593 }
1594
1595 CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock);
1596 ssl_cert_free(t->cert);
1597 t->cert = f->cert;
1598 if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
1599 return 0;
1600 }
1601
1602 return 1;
1603 }
1604
1605 /* Fix this so it checks all the valid key/cert options */
SSL_CTX_check_private_key(const SSL_CTX * ctx)1606 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
1607 {
1608 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
1609 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1610 return 0;
1611 }
1612 if (ctx->cert->key->privatekey == NULL) {
1613 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1614 return 0;
1615 }
1616 return X509_check_private_key
1617 (ctx->cert->key->x509, ctx->cert->key->privatekey);
1618 }
1619
1620 /* Fix this function so that it takes an optional type parameter */
SSL_check_private_key(const SSL * ssl)1621 int SSL_check_private_key(const SSL *ssl)
1622 {
1623 if (ssl == NULL) {
1624 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
1625 return 0;
1626 }
1627 if (ssl->cert->key->x509 == NULL) {
1628 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1629 return 0;
1630 }
1631 if (ssl->cert->key->privatekey == NULL) {
1632 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1633 return 0;
1634 }
1635 return X509_check_private_key(ssl->cert->key->x509,
1636 ssl->cert->key->privatekey);
1637 }
1638
SSL_waiting_for_async(SSL * s)1639 int SSL_waiting_for_async(SSL *s)
1640 {
1641 if (s->job)
1642 return 1;
1643
1644 return 0;
1645 }
1646
SSL_get_all_async_fds(SSL * s,OSSL_ASYNC_FD * fds,size_t * numfds)1647 int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
1648 {
1649 ASYNC_WAIT_CTX *ctx = s->waitctx;
1650
1651 if (ctx == NULL)
1652 return 0;
1653 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
1654 }
1655
SSL_get_changed_async_fds(SSL * s,OSSL_ASYNC_FD * addfd,size_t * numaddfds,OSSL_ASYNC_FD * delfd,size_t * numdelfds)1656 int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
1657 OSSL_ASYNC_FD *delfd, size_t *numdelfds)
1658 {
1659 ASYNC_WAIT_CTX *ctx = s->waitctx;
1660
1661 if (ctx == NULL)
1662 return 0;
1663 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
1664 numdelfds);
1665 }
1666
SSL_accept(SSL * s)1667 int SSL_accept(SSL *s)
1668 {
1669 if (s->handshake_func == NULL) {
1670 /* Not properly initialized yet */
1671 SSL_set_accept_state(s);
1672 }
1673
1674 return SSL_do_handshake(s);
1675 }
1676
SSL_connect(SSL * s)1677 int SSL_connect(SSL *s)
1678 {
1679 if (s->handshake_func == NULL) {
1680 /* Not properly initialized yet */
1681 SSL_set_connect_state(s);
1682 }
1683
1684 return SSL_do_handshake(s);
1685 }
1686
SSL_get_default_timeout(const SSL * s)1687 long SSL_get_default_timeout(const SSL *s)
1688 {
1689 return s->method->get_timeout();
1690 }
1691
ssl_start_async_job(SSL * s,struct ssl_async_args * args,int (* func)(void *))1692 static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
1693 int (*func) (void *))
1694 {
1695 int ret;
1696 if (s->waitctx == NULL) {
1697 s->waitctx = ASYNC_WAIT_CTX_new();
1698 if (s->waitctx == NULL)
1699 return -1;
1700 }
1701
1702 s->rwstate = SSL_NOTHING;
1703 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args,
1704 sizeof(struct ssl_async_args))) {
1705 case ASYNC_ERR:
1706 s->rwstate = SSL_NOTHING;
1707 SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC);
1708 return -1;
1709 case ASYNC_PAUSE:
1710 s->rwstate = SSL_ASYNC_PAUSED;
1711 return -1;
1712 case ASYNC_NO_JOBS:
1713 s->rwstate = SSL_ASYNC_NO_JOBS;
1714 return -1;
1715 case ASYNC_FINISH:
1716 s->job = NULL;
1717 return ret;
1718 default:
1719 s->rwstate = SSL_NOTHING;
1720 SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR);
1721 /* Shouldn't happen */
1722 return -1;
1723 }
1724 }
1725
ssl_io_intern(void * vargs)1726 static int ssl_io_intern(void *vargs)
1727 {
1728 struct ssl_async_args *args;
1729 SSL *s;
1730 void *buf;
1731 size_t num;
1732
1733 args = (struct ssl_async_args *)vargs;
1734 s = args->s;
1735 buf = args->buf;
1736 num = args->num;
1737 switch (args->type) {
1738 case READFUNC:
1739 return args->f.func_read(s, buf, num, &s->asyncrw);
1740 case WRITEFUNC:
1741 return args->f.func_write(s, buf, num, &s->asyncrw);
1742 case OTHERFUNC:
1743 return args->f.func_other(s);
1744 }
1745 return -1;
1746 }
1747
ssl_read_internal(SSL * s,void * buf,size_t num,size_t * readbytes)1748 int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1749 {
1750 if (s->handshake_func == NULL) {
1751 SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED);
1752 return -1;
1753 }
1754
1755 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1756 s->rwstate = SSL_NOTHING;
1757 return 0;
1758 }
1759
1760 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1761 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
1762 SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1763 return 0;
1764 }
1765 /*
1766 * If we are a client and haven't received the ServerHello etc then we
1767 * better do that
1768 */
1769 ossl_statem_check_finish_init(s, 0);
1770
1771 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1772 struct ssl_async_args args;
1773 int ret;
1774
1775 args.s = s;
1776 args.buf = buf;
1777 args.num = num;
1778 args.type = READFUNC;
1779 args.f.func_read = s->method->ssl_read;
1780
1781 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1782 *readbytes = s->asyncrw;
1783 return ret;
1784 } else {
1785 return s->method->ssl_read(s, buf, num, readbytes);
1786 }
1787 }
1788
SSL_read(SSL * s,void * buf,int num)1789 int SSL_read(SSL *s, void *buf, int num)
1790 {
1791 int ret;
1792 size_t readbytes;
1793
1794 if (num < 0) {
1795 SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH);
1796 return -1;
1797 }
1798
1799 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
1800
1801 /*
1802 * The cast is safe here because ret should be <= INT_MAX because num is
1803 * <= INT_MAX
1804 */
1805 if (ret > 0)
1806 ret = (int)readbytes;
1807
1808 return ret;
1809 }
1810
SSL_read_ex(SSL * s,void * buf,size_t num,size_t * readbytes)1811 int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1812 {
1813 int ret = ssl_read_internal(s, buf, num, readbytes);
1814
1815 if (ret < 0)
1816 ret = 0;
1817 return ret;
1818 }
1819
SSL_read_early_data(SSL * s,void * buf,size_t num,size_t * readbytes)1820 int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
1821 {
1822 int ret;
1823
1824 if (!s->server) {
1825 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1826 return SSL_READ_EARLY_DATA_ERROR;
1827 }
1828
1829 switch (s->early_data_state) {
1830 case SSL_EARLY_DATA_NONE:
1831 if (!SSL_in_before(s)) {
1832 SSLerr(SSL_F_SSL_READ_EARLY_DATA,
1833 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1834 return SSL_READ_EARLY_DATA_ERROR;
1835 }
1836 /* fall through */
1837
1838 case SSL_EARLY_DATA_ACCEPT_RETRY:
1839 s->early_data_state = SSL_EARLY_DATA_ACCEPTING;
1840 ret = SSL_accept(s);
1841 if (ret <= 0) {
1842 /* NBIO or error */
1843 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
1844 return SSL_READ_EARLY_DATA_ERROR;
1845 }
1846 /* fall through */
1847
1848 case SSL_EARLY_DATA_READ_RETRY:
1849 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
1850 s->early_data_state = SSL_EARLY_DATA_READING;
1851 ret = SSL_read_ex(s, buf, num, readbytes);
1852 /*
1853 * State machine will update early_data_state to
1854 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData
1855 * message
1856 */
1857 if (ret > 0 || (ret <= 0 && s->early_data_state
1858 != SSL_EARLY_DATA_FINISHED_READING)) {
1859 s->early_data_state = SSL_EARLY_DATA_READ_RETRY;
1860 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
1861 : SSL_READ_EARLY_DATA_ERROR;
1862 }
1863 } else {
1864 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
1865 }
1866 *readbytes = 0;
1867 return SSL_READ_EARLY_DATA_FINISH;
1868
1869 default:
1870 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1871 return SSL_READ_EARLY_DATA_ERROR;
1872 }
1873 }
1874
SSL_get_early_data_status(const SSL * s)1875 int SSL_get_early_data_status(const SSL *s)
1876 {
1877 return s->ext.early_data;
1878 }
1879
ssl_peek_internal(SSL * s,void * buf,size_t num,size_t * readbytes)1880 static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1881 {
1882 if (s->handshake_func == NULL) {
1883 SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED);
1884 return -1;
1885 }
1886
1887 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1888 return 0;
1889 }
1890 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1891 struct ssl_async_args args;
1892 int ret;
1893
1894 args.s = s;
1895 args.buf = buf;
1896 args.num = num;
1897 args.type = READFUNC;
1898 args.f.func_read = s->method->ssl_peek;
1899
1900 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1901 *readbytes = s->asyncrw;
1902 return ret;
1903 } else {
1904 return s->method->ssl_peek(s, buf, num, readbytes);
1905 }
1906 }
1907
SSL_peek(SSL * s,void * buf,int num)1908 int SSL_peek(SSL *s, void *buf, int num)
1909 {
1910 int ret;
1911 size_t readbytes;
1912
1913 if (num < 0) {
1914 SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH);
1915 return -1;
1916 }
1917
1918 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
1919
1920 /*
1921 * The cast is safe here because ret should be <= INT_MAX because num is
1922 * <= INT_MAX
1923 */
1924 if (ret > 0)
1925 ret = (int)readbytes;
1926
1927 return ret;
1928 }
1929
1930
SSL_peek_ex(SSL * s,void * buf,size_t num,size_t * readbytes)1931 int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1932 {
1933 int ret = ssl_peek_internal(s, buf, num, readbytes);
1934
1935 if (ret < 0)
1936 ret = 0;
1937 return ret;
1938 }
1939
ssl_write_internal(SSL * s,const void * buf,size_t num,size_t * written)1940 int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
1941 {
1942 if (s->handshake_func == NULL) {
1943 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED);
1944 return -1;
1945 }
1946
1947 if (s->shutdown & SSL_SENT_SHUTDOWN) {
1948 s->rwstate = SSL_NOTHING;
1949 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN);
1950 return -1;
1951 }
1952
1953 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1954 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY
1955 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
1956 SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1957 return 0;
1958 }
1959 /* If we are a client and haven't sent the Finished we better do that */
1960 ossl_statem_check_finish_init(s, 1);
1961
1962 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1963 int ret;
1964 struct ssl_async_args args;
1965
1966 args.s = s;
1967 args.buf = (void *)buf;
1968 args.num = num;
1969 args.type = WRITEFUNC;
1970 args.f.func_write = s->method->ssl_write;
1971
1972 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1973 *written = s->asyncrw;
1974 return ret;
1975 } else {
1976 return s->method->ssl_write(s, buf, num, written);
1977 }
1978 }
1979
SSL_write(SSL * s,const void * buf,int num)1980 int SSL_write(SSL *s, const void *buf, int num)
1981 {
1982 int ret;
1983 size_t written;
1984
1985 if (num < 0) {
1986 SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH);
1987 return -1;
1988 }
1989
1990 ret = ssl_write_internal(s, buf, (size_t)num, &written);
1991
1992 /*
1993 * The cast is safe here because ret should be <= INT_MAX because num is
1994 * <= INT_MAX
1995 */
1996 if (ret > 0)
1997 ret = (int)written;
1998
1999 return ret;
2000 }
2001
SSL_write_ex(SSL * s,const void * buf,size_t num,size_t * written)2002 int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
2003 {
2004 int ret = ssl_write_internal(s, buf, num, written);
2005
2006 if (ret < 0)
2007 ret = 0;
2008 return ret;
2009 }
2010
SSL_write_early_data(SSL * s,const void * buf,size_t num,size_t * written)2011 int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
2012 {
2013 int ret, early_data_state;
2014 size_t writtmp;
2015 uint32_t partialwrite;
2016
2017 switch (s->early_data_state) {
2018 case SSL_EARLY_DATA_NONE:
2019 if (s->server
2020 || !SSL_in_before(s)
2021 || ((s->session == NULL || s->session->ext.max_early_data == 0)
2022 && (s->psk_use_session_cb == NULL))) {
2023 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA,
2024 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2025 return 0;
2026 }
2027 /* fall through */
2028
2029 case SSL_EARLY_DATA_CONNECT_RETRY:
2030 s->early_data_state = SSL_EARLY_DATA_CONNECTING;
2031 ret = SSL_connect(s);
2032 if (ret <= 0) {
2033 /* NBIO or error */
2034 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
2035 return 0;
2036 }
2037 /* fall through */
2038
2039 case SSL_EARLY_DATA_WRITE_RETRY:
2040 s->early_data_state = SSL_EARLY_DATA_WRITING;
2041 /*
2042 * We disable partial write for early data because we don't keep track
2043 * of how many bytes we've written between the SSL_write_ex() call and
2044 * the flush if the flush needs to be retried)
2045 */
2046 partialwrite = s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE;
2047 s->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE;
2048 ret = SSL_write_ex(s, buf, num, &writtmp);
2049 s->mode |= partialwrite;
2050 if (!ret) {
2051 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2052 return ret;
2053 }
2054 s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH;
2055 /* fall through */
2056
2057 case SSL_EARLY_DATA_WRITE_FLUSH:
2058 /* The buffering BIO is still in place so we need to flush it */
2059 if (statem_flush(s) != 1)
2060 return 0;
2061 *written = num;
2062 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2063 return 1;
2064
2065 case SSL_EARLY_DATA_FINISHED_READING:
2066 case SSL_EARLY_DATA_READ_RETRY:
2067 early_data_state = s->early_data_state;
2068 /* We are a server writing to an unauthenticated client */
2069 s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING;
2070 ret = SSL_write_ex(s, buf, num, written);
2071 /* The buffering BIO is still in place */
2072 if (ret)
2073 (void)BIO_flush(s->wbio);
2074 s->early_data_state = early_data_state;
2075 return ret;
2076
2077 default:
2078 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2079 return 0;
2080 }
2081 }
2082
SSL_shutdown(SSL * s)2083 int SSL_shutdown(SSL *s)
2084 {
2085 /*
2086 * Note that this function behaves differently from what one might
2087 * expect. Return values are 0 for no success (yet), 1 for success; but
2088 * calling it once is usually not enough, even if blocking I/O is used
2089 * (see ssl3_shutdown).
2090 */
2091
2092 if (s->handshake_func == NULL) {
2093 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
2094 return -1;
2095 }
2096
2097 if (!SSL_in_init(s)) {
2098 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2099 struct ssl_async_args args;
2100
2101 memset(&args, 0, sizeof(args));
2102 args.s = s;
2103 args.type = OTHERFUNC;
2104 args.f.func_other = s->method->ssl_shutdown;
2105
2106 return ssl_start_async_job(s, &args, ssl_io_intern);
2107 } else {
2108 return s->method->ssl_shutdown(s);
2109 }
2110 } else {
2111 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT);
2112 return -1;
2113 }
2114 }
2115
SSL_key_update(SSL * s,int updatetype)2116 int SSL_key_update(SSL *s, int updatetype)
2117 {
2118 /*
2119 * TODO(TLS1.3): How will applications know whether TLSv1.3 has been
2120 * negotiated, and that it is appropriate to call SSL_key_update() instead
2121 * of SSL_renegotiate().
2122 */
2123 if (!SSL_IS_TLS13(s)) {
2124 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION);
2125 return 0;
2126 }
2127
2128 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
2129 && updatetype != SSL_KEY_UPDATE_REQUESTED) {
2130 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE);
2131 return 0;
2132 }
2133
2134 if (!SSL_is_init_finished(s)) {
2135 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT);
2136 return 0;
2137 }
2138
2139 if (RECORD_LAYER_write_pending(&s->rlayer)) {
2140 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_BAD_WRITE_RETRY);
2141 return 0;
2142 }
2143
2144 ossl_statem_set_in_init(s, 1);
2145 s->key_update = updatetype;
2146 return 1;
2147 }
2148
SSL_get_key_update_type(const SSL * s)2149 int SSL_get_key_update_type(const SSL *s)
2150 {
2151 return s->key_update;
2152 }
2153
SSL_renegotiate(SSL * s)2154 int SSL_renegotiate(SSL *s)
2155 {
2156 if (SSL_IS_TLS13(s)) {
2157 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION);
2158 return 0;
2159 }
2160
2161 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2162 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION);
2163 return 0;
2164 }
2165
2166 s->renegotiate = 1;
2167 s->new_session = 1;
2168
2169 return s->method->ssl_renegotiate(s);
2170 }
2171
SSL_renegotiate_abbreviated(SSL * s)2172 int SSL_renegotiate_abbreviated(SSL *s)
2173 {
2174 if (SSL_IS_TLS13(s)) {
2175 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION);
2176 return 0;
2177 }
2178
2179 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2180 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION);
2181 return 0;
2182 }
2183
2184 s->renegotiate = 1;
2185 s->new_session = 0;
2186
2187 return s->method->ssl_renegotiate(s);
2188 }
2189
SSL_renegotiate_pending(const SSL * s)2190 int SSL_renegotiate_pending(const SSL *s)
2191 {
2192 /*
2193 * becomes true when negotiation is requested; false again once a
2194 * handshake has finished
2195 */
2196 return (s->renegotiate != 0);
2197 }
2198
SSL_ctrl(SSL * s,int cmd,long larg,void * parg)2199 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
2200 {
2201 long l;
2202
2203 switch (cmd) {
2204 case SSL_CTRL_GET_READ_AHEAD:
2205 return RECORD_LAYER_get_read_ahead(&s->rlayer);
2206 case SSL_CTRL_SET_READ_AHEAD:
2207 l = RECORD_LAYER_get_read_ahead(&s->rlayer);
2208 RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
2209 return l;
2210
2211 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2212 s->msg_callback_arg = parg;
2213 return 1;
2214
2215 case SSL_CTRL_MODE:
2216 return (s->mode |= larg);
2217 case SSL_CTRL_CLEAR_MODE:
2218 return (s->mode &= ~larg);
2219 case SSL_CTRL_GET_MAX_CERT_LIST:
2220 return (long)s->max_cert_list;
2221 case SSL_CTRL_SET_MAX_CERT_LIST:
2222 if (larg < 0)
2223 return 0;
2224 l = (long)s->max_cert_list;
2225 s->max_cert_list = (size_t)larg;
2226 return l;
2227 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2228 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2229 return 0;
2230 s->max_send_fragment = larg;
2231 if (s->max_send_fragment < s->split_send_fragment)
2232 s->split_send_fragment = s->max_send_fragment;
2233 return 1;
2234 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2235 if ((size_t)larg > s->max_send_fragment || larg == 0)
2236 return 0;
2237 s->split_send_fragment = larg;
2238 return 1;
2239 case SSL_CTRL_SET_MAX_PIPELINES:
2240 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2241 return 0;
2242 s->max_pipelines = larg;
2243 if (larg > 1)
2244 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
2245 return 1;
2246 case SSL_CTRL_GET_RI_SUPPORT:
2247 if (s->s3)
2248 return s->s3->send_connection_binding;
2249 else
2250 return 0;
2251 case SSL_CTRL_CERT_FLAGS:
2252 return (s->cert->cert_flags |= larg);
2253 case SSL_CTRL_CLEAR_CERT_FLAGS:
2254 return (s->cert->cert_flags &= ~larg);
2255
2256 case SSL_CTRL_GET_RAW_CIPHERLIST:
2257 if (parg) {
2258 if (s->s3->tmp.ciphers_raw == NULL)
2259 return 0;
2260 *(unsigned char **)parg = s->s3->tmp.ciphers_raw;
2261 return (int)s->s3->tmp.ciphers_rawlen;
2262 } else {
2263 return TLS_CIPHER_LEN;
2264 }
2265 case SSL_CTRL_GET_EXTMS_SUPPORT:
2266 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
2267 return -1;
2268 if (s->session->flags & SSL_SESS_FLAG_EXTMS)
2269 return 1;
2270 else
2271 return 0;
2272 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2273 return ssl_check_allowed_versions(larg, s->max_proto_version)
2274 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2275 &s->min_proto_version);
2276 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2277 return s->min_proto_version;
2278 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2279 return ssl_check_allowed_versions(s->min_proto_version, larg)
2280 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2281 &s->max_proto_version);
2282 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2283 return s->max_proto_version;
2284 default:
2285 return s->method->ssl_ctrl(s, cmd, larg, parg);
2286 }
2287 }
2288
SSL_callback_ctrl(SSL * s,int cmd,void (* fp)(void))2289 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
2290 {
2291 switch (cmd) {
2292 case SSL_CTRL_SET_MSG_CALLBACK:
2293 s->msg_callback = (void (*)
2294 (int write_p, int version, int content_type,
2295 const void *buf, size_t len, SSL *ssl,
2296 void *arg))(fp);
2297 return 1;
2298
2299 default:
2300 return s->method->ssl_callback_ctrl(s, cmd, fp);
2301 }
2302 }
2303
LHASH_OF(SSL_SESSION)2304 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
2305 {
2306 return ctx->sessions;
2307 }
2308
SSL_CTX_ctrl(SSL_CTX * ctx,int cmd,long larg,void * parg)2309 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
2310 {
2311 long l;
2312 /* For some cases with ctx == NULL perform syntax checks */
2313 if (ctx == NULL) {
2314 switch (cmd) {
2315 #ifndef OPENSSL_NO_EC
2316 case SSL_CTRL_SET_GROUPS_LIST:
2317 return tls1_set_groups_list(NULL, NULL, parg);
2318 #endif
2319 case SSL_CTRL_SET_SIGALGS_LIST:
2320 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
2321 return tls1_set_sigalgs_list(NULL, parg, 0);
2322 default:
2323 return 0;
2324 }
2325 }
2326
2327 switch (cmd) {
2328 case SSL_CTRL_GET_READ_AHEAD:
2329 return ctx->read_ahead;
2330 case SSL_CTRL_SET_READ_AHEAD:
2331 l = ctx->read_ahead;
2332 ctx->read_ahead = larg;
2333 return l;
2334
2335 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2336 ctx->msg_callback_arg = parg;
2337 return 1;
2338
2339 case SSL_CTRL_GET_MAX_CERT_LIST:
2340 return (long)ctx->max_cert_list;
2341 case SSL_CTRL_SET_MAX_CERT_LIST:
2342 if (larg < 0)
2343 return 0;
2344 l = (long)ctx->max_cert_list;
2345 ctx->max_cert_list = (size_t)larg;
2346 return l;
2347
2348 case SSL_CTRL_SET_SESS_CACHE_SIZE:
2349 if (larg < 0)
2350 return 0;
2351 l = (long)ctx->session_cache_size;
2352 ctx->session_cache_size = (size_t)larg;
2353 return l;
2354 case SSL_CTRL_GET_SESS_CACHE_SIZE:
2355 return (long)ctx->session_cache_size;
2356 case SSL_CTRL_SET_SESS_CACHE_MODE:
2357 l = ctx->session_cache_mode;
2358 ctx->session_cache_mode = larg;
2359 return l;
2360 case SSL_CTRL_GET_SESS_CACHE_MODE:
2361 return ctx->session_cache_mode;
2362
2363 case SSL_CTRL_SESS_NUMBER:
2364 return lh_SSL_SESSION_num_items(ctx->sessions);
2365 case SSL_CTRL_SESS_CONNECT:
2366 return tsan_load(&ctx->stats.sess_connect);
2367 case SSL_CTRL_SESS_CONNECT_GOOD:
2368 return tsan_load(&ctx->stats.sess_connect_good);
2369 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
2370 return tsan_load(&ctx->stats.sess_connect_renegotiate);
2371 case SSL_CTRL_SESS_ACCEPT:
2372 return tsan_load(&ctx->stats.sess_accept);
2373 case SSL_CTRL_SESS_ACCEPT_GOOD:
2374 return tsan_load(&ctx->stats.sess_accept_good);
2375 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
2376 return tsan_load(&ctx->stats.sess_accept_renegotiate);
2377 case SSL_CTRL_SESS_HIT:
2378 return tsan_load(&ctx->stats.sess_hit);
2379 case SSL_CTRL_SESS_CB_HIT:
2380 return tsan_load(&ctx->stats.sess_cb_hit);
2381 case SSL_CTRL_SESS_MISSES:
2382 return tsan_load(&ctx->stats.sess_miss);
2383 case SSL_CTRL_SESS_TIMEOUTS:
2384 return tsan_load(&ctx->stats.sess_timeout);
2385 case SSL_CTRL_SESS_CACHE_FULL:
2386 return tsan_load(&ctx->stats.sess_cache_full);
2387 case SSL_CTRL_MODE:
2388 return (ctx->mode |= larg);
2389 case SSL_CTRL_CLEAR_MODE:
2390 return (ctx->mode &= ~larg);
2391 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2392 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2393 return 0;
2394 ctx->max_send_fragment = larg;
2395 if (ctx->max_send_fragment < ctx->split_send_fragment)
2396 ctx->split_send_fragment = ctx->max_send_fragment;
2397 return 1;
2398 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2399 if ((size_t)larg > ctx->max_send_fragment || larg == 0)
2400 return 0;
2401 ctx->split_send_fragment = larg;
2402 return 1;
2403 case SSL_CTRL_SET_MAX_PIPELINES:
2404 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2405 return 0;
2406 ctx->max_pipelines = larg;
2407 return 1;
2408 case SSL_CTRL_CERT_FLAGS:
2409 return (ctx->cert->cert_flags |= larg);
2410 case SSL_CTRL_CLEAR_CERT_FLAGS:
2411 return (ctx->cert->cert_flags &= ~larg);
2412 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2413 return ssl_check_allowed_versions(larg, ctx->max_proto_version)
2414 && ssl_set_version_bound(ctx->method->version, (int)larg,
2415 &ctx->min_proto_version);
2416 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2417 return ctx->min_proto_version;
2418 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2419 return ssl_check_allowed_versions(ctx->min_proto_version, larg)
2420 && ssl_set_version_bound(ctx->method->version, (int)larg,
2421 &ctx->max_proto_version);
2422 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2423 return ctx->max_proto_version;
2424 default:
2425 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg);
2426 }
2427 }
2428
SSL_CTX_callback_ctrl(SSL_CTX * ctx,int cmd,void (* fp)(void))2429 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
2430 {
2431 switch (cmd) {
2432 case SSL_CTRL_SET_MSG_CALLBACK:
2433 ctx->msg_callback = (void (*)
2434 (int write_p, int version, int content_type,
2435 const void *buf, size_t len, SSL *ssl,
2436 void *arg))(fp);
2437 return 1;
2438
2439 default:
2440 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp);
2441 }
2442 }
2443
ssl_cipher_id_cmp(const SSL_CIPHER * a,const SSL_CIPHER * b)2444 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
2445 {
2446 if (a->id > b->id)
2447 return 1;
2448 if (a->id < b->id)
2449 return -1;
2450 return 0;
2451 }
2452
ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const * ap,const SSL_CIPHER * const * bp)2453 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
2454 const SSL_CIPHER *const *bp)
2455 {
2456 if ((*ap)->id > (*bp)->id)
2457 return 1;
2458 if ((*ap)->id < (*bp)->id)
2459 return -1;
2460 return 0;
2461 }
2462
2463 /** return a STACK of the ciphers available for the SSL and in order of
2464 * preference */
STACK_OF(SSL_CIPHER)2465 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
2466 {
2467 if (s != NULL) {
2468 if (s->cipher_list != NULL) {
2469 return s->cipher_list;
2470 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
2471 return s->ctx->cipher_list;
2472 }
2473 }
2474 return NULL;
2475 }
2476
STACK_OF(SSL_CIPHER)2477 STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
2478 {
2479 if ((s == NULL) || !s->server)
2480 return NULL;
2481 return s->peer_ciphers;
2482 }
2483
STACK_OF(SSL_CIPHER)2484 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
2485 {
2486 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
2487 int i;
2488
2489 ciphers = SSL_get_ciphers(s);
2490 if (!ciphers)
2491 return NULL;
2492 if (!ssl_set_client_disabled(s))
2493 return NULL;
2494 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
2495 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
2496 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) {
2497 if (!sk)
2498 sk = sk_SSL_CIPHER_new_null();
2499 if (!sk)
2500 return NULL;
2501 if (!sk_SSL_CIPHER_push(sk, c)) {
2502 sk_SSL_CIPHER_free(sk);
2503 return NULL;
2504 }
2505 }
2506 }
2507 return sk;
2508 }
2509
2510 /** return a STACK of the ciphers available for the SSL and in order of
2511 * algorithm id */
STACK_OF(SSL_CIPHER)2512 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
2513 {
2514 if (s != NULL) {
2515 if (s->cipher_list_by_id != NULL) {
2516 return s->cipher_list_by_id;
2517 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
2518 return s->ctx->cipher_list_by_id;
2519 }
2520 }
2521 return NULL;
2522 }
2523
2524 /** The old interface to get the same thing as SSL_get_ciphers() */
SSL_get_cipher_list(const SSL * s,int n)2525 const char *SSL_get_cipher_list(const SSL *s, int n)
2526 {
2527 const SSL_CIPHER *c;
2528 STACK_OF(SSL_CIPHER) *sk;
2529
2530 if (s == NULL)
2531 return NULL;
2532 sk = SSL_get_ciphers(s);
2533 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
2534 return NULL;
2535 c = sk_SSL_CIPHER_value(sk, n);
2536 if (c == NULL)
2537 return NULL;
2538 return c->name;
2539 }
2540
2541 /** return a STACK of the ciphers available for the SSL_CTX and in order of
2542 * preference */
STACK_OF(SSL_CIPHER)2543 STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
2544 {
2545 if (ctx != NULL)
2546 return ctx->cipher_list;
2547 return NULL;
2548 }
2549
2550 /*
2551 * Distinguish between ciphers controlled by set_ciphersuite() and
2552 * set_cipher_list() when counting.
2553 */
cipher_list_tls12_num(STACK_OF (SSL_CIPHER)* sk)2554 static int cipher_list_tls12_num(STACK_OF(SSL_CIPHER) *sk)
2555 {
2556 int i, num = 0;
2557 const SSL_CIPHER *c;
2558
2559 if (sk == NULL)
2560 return 0;
2561 for (i = 0; i < sk_SSL_CIPHER_num(sk); ++i) {
2562 c = sk_SSL_CIPHER_value(sk, i);
2563 if (c->min_tls >= TLS1_3_VERSION)
2564 continue;
2565 num++;
2566 }
2567 return num;
2568 }
2569
2570 /** specify the ciphers to be used by default by the SSL_CTX */
SSL_CTX_set_cipher_list(SSL_CTX * ctx,const char * str)2571 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
2572 {
2573 STACK_OF(SSL_CIPHER) *sk;
2574
2575 sk = ssl_create_cipher_list(ctx->method, ctx->tls13_ciphersuites,
2576 &ctx->cipher_list, &ctx->cipher_list_by_id, str,
2577 ctx->cert);
2578 /*
2579 * ssl_create_cipher_list may return an empty stack if it was unable to
2580 * find a cipher matching the given rule string (for example if the rule
2581 * string specifies a cipher which has been disabled). This is not an
2582 * error as far as ssl_create_cipher_list is concerned, and hence
2583 * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
2584 */
2585 if (sk == NULL)
2586 return 0;
2587 else if (cipher_list_tls12_num(sk) == 0) {
2588 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2589 return 0;
2590 }
2591 return 1;
2592 }
2593
2594 /** specify the ciphers to be used by the SSL */
SSL_set_cipher_list(SSL * s,const char * str)2595 int SSL_set_cipher_list(SSL *s, const char *str)
2596 {
2597 STACK_OF(SSL_CIPHER) *sk;
2598
2599 sk = ssl_create_cipher_list(s->ctx->method, s->tls13_ciphersuites,
2600 &s->cipher_list, &s->cipher_list_by_id, str,
2601 s->cert);
2602 /* see comment in SSL_CTX_set_cipher_list */
2603 if (sk == NULL)
2604 return 0;
2605 else if (cipher_list_tls12_num(sk) == 0) {
2606 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2607 return 0;
2608 }
2609 return 1;
2610 }
2611
SSL_get_shared_ciphers(const SSL * s,char * buf,int size)2612 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size)
2613 {
2614 char *p;
2615 STACK_OF(SSL_CIPHER) *clntsk, *srvrsk;
2616 const SSL_CIPHER *c;
2617 int i;
2618
2619 if (!s->server
2620 || s->peer_ciphers == NULL
2621 || size < 2)
2622 return NULL;
2623
2624 p = buf;
2625 clntsk = s->peer_ciphers;
2626 srvrsk = SSL_get_ciphers(s);
2627 if (clntsk == NULL || srvrsk == NULL)
2628 return NULL;
2629
2630 if (sk_SSL_CIPHER_num(clntsk) == 0 || sk_SSL_CIPHER_num(srvrsk) == 0)
2631 return NULL;
2632
2633 for (i = 0; i < sk_SSL_CIPHER_num(clntsk); i++) {
2634 int n;
2635
2636 c = sk_SSL_CIPHER_value(clntsk, i);
2637 if (sk_SSL_CIPHER_find(srvrsk, c) < 0)
2638 continue;
2639
2640 n = strlen(c->name);
2641 if (n + 1 > size) {
2642 if (p != buf)
2643 --p;
2644 *p = '\0';
2645 return buf;
2646 }
2647 strcpy(p, c->name);
2648 p += n;
2649 *(p++) = ':';
2650 size -= n + 1;
2651 }
2652 p[-1] = '\0';
2653 return buf;
2654 }
2655
2656 /**
2657 * Return the requested servername (SNI) value. Note that the behaviour varies
2658 * depending on:
2659 * - whether this is called by the client or the server,
2660 * - if we are before or during/after the handshake,
2661 * - if a resumption or normal handshake is being attempted/has occurred
2662 * - whether we have negotiated TLSv1.2 (or below) or TLSv1.3
2663 *
2664 * Note that only the host_name type is defined (RFC 3546).
2665 */
SSL_get_servername(const SSL * s,const int type)2666 const char *SSL_get_servername(const SSL *s, const int type)
2667 {
2668 /*
2669 * If we don't know if we are the client or the server yet then we assume
2670 * client.
2671 */
2672 int server = s->handshake_func == NULL ? 0 : s->server;
2673 if (type != TLSEXT_NAMETYPE_host_name)
2674 return NULL;
2675
2676 if (server) {
2677 /**
2678 * Server side
2679 * In TLSv1.3 on the server SNI is not associated with the session
2680 * but in TLSv1.2 or below it is.
2681 *
2682 * Before the handshake:
2683 * - return NULL
2684 *
2685 * During/after the handshake (TLSv1.2 or below resumption occurred):
2686 * - If a servername was accepted by the server in the original
2687 * handshake then it will return that servername, or NULL otherwise.
2688 *
2689 * During/after the handshake (TLSv1.2 or below resumption did not occur):
2690 * - The function will return the servername requested by the client in
2691 * this handshake or NULL if none was requested.
2692 */
2693 if (s->hit && !SSL_IS_TLS13(s))
2694 return s->session->ext.hostname;
2695 } else {
2696 /**
2697 * Client side
2698 *
2699 * Before the handshake:
2700 * - If a servername has been set via a call to
2701 * SSL_set_tlsext_host_name() then it will return that servername
2702 * - If one has not been set, but a TLSv1.2 resumption is being
2703 * attempted and the session from the original handshake had a
2704 * servername accepted by the server then it will return that
2705 * servername
2706 * - Otherwise it returns NULL
2707 *
2708 * During/after the handshake (TLSv1.2 or below resumption occurred):
2709 * - If the session from the original handshake had a servername accepted
2710 * by the server then it will return that servername.
2711 * - Otherwise it returns the servername set via
2712 * SSL_set_tlsext_host_name() (or NULL if it was not called).
2713 *
2714 * During/after the handshake (TLSv1.2 or below resumption did not occur):
2715 * - It will return the servername set via SSL_set_tlsext_host_name()
2716 * (or NULL if it was not called).
2717 */
2718 if (SSL_in_before(s)) {
2719 if (s->ext.hostname == NULL
2720 && s->session != NULL
2721 && s->session->ssl_version != TLS1_3_VERSION)
2722 return s->session->ext.hostname;
2723 } else {
2724 if (!SSL_IS_TLS13(s) && s->hit && s->session->ext.hostname != NULL)
2725 return s->session->ext.hostname;
2726 }
2727 }
2728
2729 return s->ext.hostname;
2730 }
2731
SSL_get_servername_type(const SSL * s)2732 int SSL_get_servername_type(const SSL *s)
2733 {
2734 if (SSL_get_servername(s, TLSEXT_NAMETYPE_host_name) != NULL)
2735 return TLSEXT_NAMETYPE_host_name;
2736 return -1;
2737 }
2738
2739 /*
2740 * SSL_select_next_proto implements the standard protocol selection. It is
2741 * expected that this function is called from the callback set by
2742 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
2743 * vector of 8-bit, length prefixed byte strings. The length byte itself is
2744 * not included in the length. A byte string of length 0 is invalid. No byte
2745 * string may be truncated. The current, but experimental algorithm for
2746 * selecting the protocol is: 1) If the server doesn't support NPN then this
2747 * is indicated to the callback. In this case, the client application has to
2748 * abort the connection or have a default application level protocol. 2) If
2749 * the server supports NPN, but advertises an empty list then the client
2750 * selects the first protocol in its list, but indicates via the API that this
2751 * fallback case was enacted. 3) Otherwise, the client finds the first
2752 * protocol in the server's list that it supports and selects this protocol.
2753 * This is because it's assumed that the server has better information about
2754 * which protocol a client should use. 4) If the client doesn't support any
2755 * of the server's advertised protocols, then this is treated the same as
2756 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
2757 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
2758 */
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)2759 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
2760 const unsigned char *server,
2761 unsigned int server_len,
2762 const unsigned char *client, unsigned int client_len)
2763 {
2764 unsigned int i, j;
2765 const unsigned char *result;
2766 int status = OPENSSL_NPN_UNSUPPORTED;
2767
2768 /*
2769 * For each protocol in server preference order, see if we support it.
2770 */
2771 for (i = 0; i < server_len;) {
2772 for (j = 0; j < client_len;) {
2773 if (server[i] == client[j] &&
2774 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
2775 /* We found a match */
2776 result = &server[i];
2777 status = OPENSSL_NPN_NEGOTIATED;
2778 goto found;
2779 }
2780 j += client[j];
2781 j++;
2782 }
2783 i += server[i];
2784 i++;
2785 }
2786
2787 /* There's no overlap between our protocols and the server's list. */
2788 result = client;
2789 status = OPENSSL_NPN_NO_OVERLAP;
2790
2791 found:
2792 *out = (unsigned char *)result + 1;
2793 *outlen = result[0];
2794 return status;
2795 }
2796
2797 #ifndef OPENSSL_NO_NEXTPROTONEG
2798 /*
2799 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
2800 * client's requested protocol for this connection and returns 0. If the
2801 * client didn't request any protocol, then *data is set to NULL. Note that
2802 * the client can request any protocol it chooses. The value returned from
2803 * this function need not be a member of the list of supported protocols
2804 * provided by the callback.
2805 */
SSL_get0_next_proto_negotiated(const SSL * s,const unsigned char ** data,unsigned * len)2806 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
2807 unsigned *len)
2808 {
2809 *data = s->ext.npn;
2810 if (!*data) {
2811 *len = 0;
2812 } else {
2813 *len = (unsigned int)s->ext.npn_len;
2814 }
2815 }
2816
2817 /*
2818 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
2819 * a TLS server needs a list of supported protocols for Next Protocol
2820 * Negotiation. The returned list must be in wire format. The list is
2821 * returned by setting |out| to point to it and |outlen| to its length. This
2822 * memory will not be modified, but one should assume that the SSL* keeps a
2823 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
2824 * wishes to advertise. Otherwise, no such extension will be included in the
2825 * ServerHello.
2826 */
SSL_CTX_set_npn_advertised_cb(SSL_CTX * ctx,SSL_CTX_npn_advertised_cb_func cb,void * arg)2827 void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
2828 SSL_CTX_npn_advertised_cb_func cb,
2829 void *arg)
2830 {
2831 ctx->ext.npn_advertised_cb = cb;
2832 ctx->ext.npn_advertised_cb_arg = arg;
2833 }
2834
2835 /*
2836 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
2837 * client needs to select a protocol from the server's provided list. |out|
2838 * must be set to point to the selected protocol (which may be within |in|).
2839 * The length of the protocol name must be written into |outlen|. The
2840 * server's advertised protocols are provided in |in| and |inlen|. The
2841 * callback can assume that |in| is syntactically valid. The client must
2842 * select a protocol. It is fatal to the connection if this callback returns
2843 * a value other than SSL_TLSEXT_ERR_OK.
2844 */
SSL_CTX_set_npn_select_cb(SSL_CTX * ctx,SSL_CTX_npn_select_cb_func cb,void * arg)2845 void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
2846 SSL_CTX_npn_select_cb_func cb,
2847 void *arg)
2848 {
2849 ctx->ext.npn_select_cb = cb;
2850 ctx->ext.npn_select_cb_arg = arg;
2851 }
2852 #endif
2853
alpn_value_ok(const unsigned char * protos,unsigned int protos_len)2854 static int alpn_value_ok(const unsigned char *protos, unsigned int protos_len)
2855 {
2856 unsigned int idx;
2857
2858 if (protos_len < 2 || protos == NULL)
2859 return 0;
2860
2861 for (idx = 0; idx < protos_len; idx += protos[idx] + 1) {
2862 if (protos[idx] == 0)
2863 return 0;
2864 }
2865 return idx == protos_len;
2866 }
2867 /*
2868 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
2869 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2870 * length-prefixed strings). Returns 0 on success.
2871 */
SSL_CTX_set_alpn_protos(SSL_CTX * ctx,const unsigned char * protos,unsigned int protos_len)2872 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
2873 unsigned int protos_len)
2874 {
2875 unsigned char *alpn;
2876
2877 if (protos_len == 0 || protos == NULL) {
2878 OPENSSL_free(ctx->ext.alpn);
2879 ctx->ext.alpn = NULL;
2880 ctx->ext.alpn_len = 0;
2881 return 0;
2882 }
2883 /* Not valid per RFC */
2884 if (!alpn_value_ok(protos, protos_len))
2885 return 1;
2886
2887 alpn = OPENSSL_memdup(protos, protos_len);
2888 if (alpn == NULL) {
2889 SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2890 return 1;
2891 }
2892 OPENSSL_free(ctx->ext.alpn);
2893 ctx->ext.alpn = alpn;
2894 ctx->ext.alpn_len = protos_len;
2895
2896 return 0;
2897 }
2898
2899 /*
2900 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
2901 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2902 * length-prefixed strings). Returns 0 on success.
2903 */
SSL_set_alpn_protos(SSL * ssl,const unsigned char * protos,unsigned int protos_len)2904 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
2905 unsigned int protos_len)
2906 {
2907 unsigned char *alpn;
2908
2909 if (protos_len == 0 || protos == NULL) {
2910 OPENSSL_free(ssl->ext.alpn);
2911 ssl->ext.alpn = NULL;
2912 ssl->ext.alpn_len = 0;
2913 return 0;
2914 }
2915 /* Not valid per RFC */
2916 if (!alpn_value_ok(protos, protos_len))
2917 return 1;
2918
2919 alpn = OPENSSL_memdup(protos, protos_len);
2920 if (alpn == NULL) {
2921 SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2922 return 1;
2923 }
2924 OPENSSL_free(ssl->ext.alpn);
2925 ssl->ext.alpn = alpn;
2926 ssl->ext.alpn_len = protos_len;
2927
2928 return 0;
2929 }
2930
2931 /*
2932 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
2933 * called during ClientHello processing in order to select an ALPN protocol
2934 * from the client's list of offered protocols.
2935 */
SSL_CTX_set_alpn_select_cb(SSL_CTX * ctx,SSL_CTX_alpn_select_cb_func cb,void * arg)2936 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
2937 SSL_CTX_alpn_select_cb_func cb,
2938 void *arg)
2939 {
2940 ctx->ext.alpn_select_cb = cb;
2941 ctx->ext.alpn_select_cb_arg = arg;
2942 }
2943
2944 /*
2945 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
2946 * On return it sets |*data| to point to |*len| bytes of protocol name
2947 * (not including the leading length-prefix byte). If the server didn't
2948 * respond with a negotiated protocol then |*len| will be zero.
2949 */
SSL_get0_alpn_selected(const SSL * ssl,const unsigned char ** data,unsigned int * len)2950 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
2951 unsigned int *len)
2952 {
2953 *data = NULL;
2954 if (ssl->s3)
2955 *data = ssl->s3->alpn_selected;
2956 if (*data == NULL)
2957 *len = 0;
2958 else
2959 *len = (unsigned int)ssl->s3->alpn_selected_len;
2960 }
2961
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)2962 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
2963 const char *label, size_t llen,
2964 const unsigned char *context, size_t contextlen,
2965 int use_context)
2966 {
2967 if (s->session == NULL
2968 || (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER))
2969 return -1;
2970
2971 return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
2972 llen, context,
2973 contextlen, use_context);
2974 }
2975
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)2976 int SSL_export_keying_material_early(SSL *s, unsigned char *out, size_t olen,
2977 const char *label, size_t llen,
2978 const unsigned char *context,
2979 size_t contextlen)
2980 {
2981 if (s->version != TLS1_3_VERSION)
2982 return 0;
2983
2984 return tls13_export_keying_material_early(s, out, olen, label, llen,
2985 context, contextlen);
2986 }
2987
ssl_session_hash(const SSL_SESSION * a)2988 static unsigned long ssl_session_hash(const SSL_SESSION *a)
2989 {
2990 const unsigned char *session_id = a->session_id;
2991 unsigned long l;
2992 unsigned char tmp_storage[4];
2993
2994 if (a->session_id_length < sizeof(tmp_storage)) {
2995 memset(tmp_storage, 0, sizeof(tmp_storage));
2996 memcpy(tmp_storage, a->session_id, a->session_id_length);
2997 session_id = tmp_storage;
2998 }
2999
3000 l = (unsigned long)
3001 ((unsigned long)session_id[0]) |
3002 ((unsigned long)session_id[1] << 8L) |
3003 ((unsigned long)session_id[2] << 16L) |
3004 ((unsigned long)session_id[3] << 24L);
3005 return l;
3006 }
3007
3008 /*
3009 * NB: If this function (or indeed the hash function which uses a sort of
3010 * coarser function than this one) is changed, ensure
3011 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
3012 * being able to construct an SSL_SESSION that will collide with any existing
3013 * session with a matching session ID.
3014 */
ssl_session_cmp(const SSL_SESSION * a,const SSL_SESSION * b)3015 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
3016 {
3017 if (a->ssl_version != b->ssl_version)
3018 return 1;
3019 if (a->session_id_length != b->session_id_length)
3020 return 1;
3021 return memcmp(a->session_id, b->session_id, a->session_id_length);
3022 }
3023
3024 /*
3025 * These wrapper functions should remain rather than redeclaring
3026 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
3027 * variable. The reason is that the functions aren't static, they're exposed
3028 * via ssl.h.
3029 */
3030
SSL_CTX_new(const SSL_METHOD * meth)3031 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
3032 {
3033 SSL_CTX *ret = NULL;
3034
3035 if (meth == NULL) {
3036 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED);
3037 return NULL;
3038 }
3039
3040 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
3041 return NULL;
3042
3043 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
3044 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
3045 goto err;
3046 }
3047 ret = OPENSSL_zalloc(sizeof(*ret));
3048 if (ret == NULL)
3049 goto err;
3050
3051 ret->method = meth;
3052 ret->min_proto_version = 0;
3053 ret->max_proto_version = 0;
3054 ret->mode = SSL_MODE_AUTO_RETRY;
3055 ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
3056 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
3057 /* We take the system default. */
3058 ret->session_timeout = meth->get_timeout();
3059 ret->references = 1;
3060 ret->lock = CRYPTO_THREAD_lock_new();
3061 if (ret->lock == NULL) {
3062 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
3063 OPENSSL_free(ret);
3064 return NULL;
3065 }
3066 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
3067 ret->verify_mode = SSL_VERIFY_NONE;
3068 if ((ret->cert = ssl_cert_new()) == NULL)
3069 goto err;
3070
3071 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
3072 if (ret->sessions == NULL)
3073 goto err;
3074 ret->cert_store = X509_STORE_new();
3075 if (ret->cert_store == NULL)
3076 goto err;
3077 #ifndef OPENSSL_NO_CT
3078 ret->ctlog_store = CTLOG_STORE_new();
3079 if (ret->ctlog_store == NULL)
3080 goto err;
3081 #endif
3082
3083 if (!SSL_CTX_set_ciphersuites(ret, TLS_DEFAULT_CIPHERSUITES))
3084 goto err;
3085
3086 if (!ssl_create_cipher_list(ret->method,
3087 ret->tls13_ciphersuites,
3088 &ret->cipher_list, &ret->cipher_list_by_id,
3089 SSL_DEFAULT_CIPHER_LIST, ret->cert)
3090 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
3091 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS);
3092 goto err2;
3093 }
3094
3095 ret->param = X509_VERIFY_PARAM_new();
3096 if (ret->param == NULL)
3097 goto err;
3098
3099 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
3100 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
3101 goto err2;
3102 }
3103 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) {
3104 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
3105 goto err2;
3106 }
3107
3108 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL)
3109 goto err;
3110
3111 if ((ret->client_ca_names = sk_X509_NAME_new_null()) == NULL)
3112 goto err;
3113
3114 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
3115 goto err;
3116
3117 if ((ret->ext.secure = OPENSSL_secure_zalloc(sizeof(*ret->ext.secure))) == NULL)
3118 goto err;
3119
3120 /* No compression for DTLS */
3121 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
3122 ret->comp_methods = SSL_COMP_get_compression_methods();
3123
3124 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3125 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3126
3127 /* Setup RFC5077 ticket keys */
3128 if ((RAND_bytes(ret->ext.tick_key_name,
3129 sizeof(ret->ext.tick_key_name)) <= 0)
3130 || (RAND_priv_bytes(ret->ext.secure->tick_hmac_key,
3131 sizeof(ret->ext.secure->tick_hmac_key)) <= 0)
3132 || (RAND_priv_bytes(ret->ext.secure->tick_aes_key,
3133 sizeof(ret->ext.secure->tick_aes_key)) <= 0))
3134 ret->options |= SSL_OP_NO_TICKET;
3135
3136 if (RAND_priv_bytes(ret->ext.cookie_hmac_key,
3137 sizeof(ret->ext.cookie_hmac_key)) <= 0)
3138 goto err;
3139
3140 #ifndef OPENSSL_NO_SRP
3141 if (!SSL_CTX_SRP_CTX_init(ret))
3142 goto err;
3143 #endif
3144 #ifndef OPENSSL_NO_ENGINE
3145 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
3146 # define eng_strx(x) #x
3147 # define eng_str(x) eng_strx(x)
3148 /* Use specific client engine automatically... ignore errors */
3149 {
3150 ENGINE *eng;
3151 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3152 if (!eng) {
3153 ERR_clear_error();
3154 ENGINE_load_builtin_engines();
3155 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3156 }
3157 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
3158 ERR_clear_error();
3159 }
3160 # endif
3161 #endif
3162 /*
3163 * Default is to connect to non-RI servers. When RI is more widely
3164 * deployed might change this.
3165 */
3166 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
3167 /*
3168 * Disable compression by default to prevent CRIME. Applications can
3169 * re-enable compression by configuring
3170 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
3171 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3
3172 * middlebox compatibility by default. This may be disabled by default in
3173 * a later OpenSSL version.
3174 */
3175 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT;
3176
3177 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
3178
3179 /*
3180 * We cannot usefully set a default max_early_data here (which gets
3181 * propagated in SSL_new(), for the following reason: setting the
3182 * SSL field causes tls_construct_stoc_early_data() to tell the
3183 * client that early data will be accepted when constructing a TLS 1.3
3184 * session ticket, and the client will accordingly send us early data
3185 * when using that ticket (if the client has early data to send).
3186 * However, in order for the early data to actually be consumed by
3187 * the application, the application must also have calls to
3188 * SSL_read_early_data(); otherwise we'll just skip past the early data
3189 * and ignore it. So, since the application must add calls to
3190 * SSL_read_early_data(), we also require them to add
3191 * calls to SSL_CTX_set_max_early_data() in order to use early data,
3192 * eliminating the bandwidth-wasting early data in the case described
3193 * above.
3194 */
3195 ret->max_early_data = 0;
3196
3197 /*
3198 * Default recv_max_early_data is a fully loaded single record. Could be
3199 * split across multiple records in practice. We set this differently to
3200 * max_early_data so that, in the default case, we do not advertise any
3201 * support for early_data, but if a client were to send us some (e.g.
3202 * because of an old, stale ticket) then we will tolerate it and skip over
3203 * it.
3204 */
3205 ret->recv_max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
3206
3207 /* By default we send two session tickets automatically in TLSv1.3 */
3208 ret->num_tickets = 2;
3209
3210 ssl_ctx_system_config(ret);
3211
3212 return ret;
3213 err:
3214 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
3215 err2:
3216 SSL_CTX_free(ret);
3217 return NULL;
3218 }
3219
SSL_CTX_up_ref(SSL_CTX * ctx)3220 int SSL_CTX_up_ref(SSL_CTX *ctx)
3221 {
3222 int i;
3223
3224 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
3225 return 0;
3226
3227 REF_PRINT_COUNT("SSL_CTX", ctx);
3228 REF_ASSERT_ISNT(i < 2);
3229 return ((i > 1) ? 1 : 0);
3230 }
3231
SSL_CTX_free(SSL_CTX * a)3232 void SSL_CTX_free(SSL_CTX *a)
3233 {
3234 int i;
3235
3236 if (a == NULL)
3237 return;
3238
3239 CRYPTO_DOWN_REF(&a->references, &i, a->lock);
3240 REF_PRINT_COUNT("SSL_CTX", a);
3241 if (i > 0)
3242 return;
3243 REF_ASSERT_ISNT(i < 0);
3244
3245 X509_VERIFY_PARAM_free(a->param);
3246 dane_ctx_final(&a->dane);
3247
3248 /*
3249 * Free internal session cache. However: the remove_cb() may reference
3250 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
3251 * after the sessions were flushed.
3252 * As the ex_data handling routines might also touch the session cache,
3253 * the most secure solution seems to be: empty (flush) the cache, then
3254 * free ex_data, then finally free the cache.
3255 * (See ticket [openssl.org #212].)
3256 */
3257 if (a->sessions != NULL)
3258 SSL_CTX_flush_sessions(a, 0);
3259
3260 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
3261 lh_SSL_SESSION_free(a->sessions);
3262 X509_STORE_free(a->cert_store);
3263 #ifndef OPENSSL_NO_CT
3264 CTLOG_STORE_free(a->ctlog_store);
3265 #endif
3266 sk_SSL_CIPHER_free(a->cipher_list);
3267 sk_SSL_CIPHER_free(a->cipher_list_by_id);
3268 sk_SSL_CIPHER_free(a->tls13_ciphersuites);
3269 ssl_cert_free(a->cert);
3270 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free);
3271 sk_X509_NAME_pop_free(a->client_ca_names, X509_NAME_free);
3272 sk_X509_pop_free(a->extra_certs, X509_free);
3273 a->comp_methods = NULL;
3274 #ifndef OPENSSL_NO_SRTP
3275 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
3276 #endif
3277 #ifndef OPENSSL_NO_SRP
3278 SSL_CTX_SRP_CTX_free(a);
3279 #endif
3280 #ifndef OPENSSL_NO_ENGINE
3281 ENGINE_finish(a->client_cert_engine);
3282 #endif
3283
3284 #ifndef OPENSSL_NO_EC
3285 OPENSSL_free(a->ext.ecpointformats);
3286 OPENSSL_free(a->ext.supportedgroups);
3287 #endif
3288 OPENSSL_free(a->ext.alpn);
3289 OPENSSL_secure_free(a->ext.secure);
3290
3291 CRYPTO_THREAD_lock_free(a->lock);
3292
3293 OPENSSL_free(a);
3294 }
3295
SSL_CTX_set_default_passwd_cb(SSL_CTX * ctx,pem_password_cb * cb)3296 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
3297 {
3298 ctx->default_passwd_callback = cb;
3299 }
3300
SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX * ctx,void * u)3301 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
3302 {
3303 ctx->default_passwd_callback_userdata = u;
3304 }
3305
SSL_CTX_get_default_passwd_cb(SSL_CTX * ctx)3306 pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
3307 {
3308 return ctx->default_passwd_callback;
3309 }
3310
SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX * ctx)3311 void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
3312 {
3313 return ctx->default_passwd_callback_userdata;
3314 }
3315
SSL_set_default_passwd_cb(SSL * s,pem_password_cb * cb)3316 void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
3317 {
3318 s->default_passwd_callback = cb;
3319 }
3320
SSL_set_default_passwd_cb_userdata(SSL * s,void * u)3321 void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
3322 {
3323 s->default_passwd_callback_userdata = u;
3324 }
3325
SSL_get_default_passwd_cb(SSL * s)3326 pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
3327 {
3328 return s->default_passwd_callback;
3329 }
3330
SSL_get_default_passwd_cb_userdata(SSL * s)3331 void *SSL_get_default_passwd_cb_userdata(SSL *s)
3332 {
3333 return s->default_passwd_callback_userdata;
3334 }
3335
SSL_CTX_set_cert_verify_callback(SSL_CTX * ctx,int (* cb)(X509_STORE_CTX *,void *),void * arg)3336 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
3337 int (*cb) (X509_STORE_CTX *, void *),
3338 void *arg)
3339 {
3340 ctx->app_verify_callback = cb;
3341 ctx->app_verify_arg = arg;
3342 }
3343
SSL_CTX_set_verify(SSL_CTX * ctx,int mode,int (* cb)(int,X509_STORE_CTX *))3344 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
3345 int (*cb) (int, X509_STORE_CTX *))
3346 {
3347 ctx->verify_mode = mode;
3348 ctx->default_verify_callback = cb;
3349 }
3350
SSL_CTX_set_verify_depth(SSL_CTX * ctx,int depth)3351 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
3352 {
3353 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
3354 }
3355
SSL_CTX_set_cert_cb(SSL_CTX * c,int (* cb)(SSL * ssl,void * arg),void * arg)3356 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
3357 {
3358 ssl_cert_set_cert_cb(c->cert, cb, arg);
3359 }
3360
SSL_set_cert_cb(SSL * s,int (* cb)(SSL * ssl,void * arg),void * arg)3361 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
3362 {
3363 ssl_cert_set_cert_cb(s->cert, cb, arg);
3364 }
3365
ssl_set_masks(SSL * s)3366 void ssl_set_masks(SSL *s)
3367 {
3368 CERT *c = s->cert;
3369 uint32_t *pvalid = s->s3->tmp.valid_flags;
3370 int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
3371 unsigned long mask_k, mask_a;
3372 #ifndef OPENSSL_NO_EC
3373 int have_ecc_cert, ecdsa_ok;
3374 #endif
3375 if (c == NULL)
3376 return;
3377
3378 #ifndef OPENSSL_NO_DH
3379 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
3380 #else
3381 dh_tmp = 0;
3382 #endif
3383
3384 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3385 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3386 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
3387 #ifndef OPENSSL_NO_EC
3388 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
3389 #endif
3390 mask_k = 0;
3391 mask_a = 0;
3392
3393 #ifdef CIPHER_DEBUG
3394 fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n",
3395 dh_tmp, rsa_enc, rsa_sign, dsa_sign);
3396 #endif
3397
3398 #ifndef OPENSSL_NO_GOST
3399 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
3400 mask_k |= SSL_kGOST;
3401 mask_a |= SSL_aGOST12;
3402 }
3403 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
3404 mask_k |= SSL_kGOST;
3405 mask_a |= SSL_aGOST12;
3406 }
3407 if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
3408 mask_k |= SSL_kGOST;
3409 mask_a |= SSL_aGOST01;
3410 }
3411 #endif
3412
3413 if (rsa_enc)
3414 mask_k |= SSL_kRSA;
3415
3416 if (dh_tmp)
3417 mask_k |= SSL_kDHE;
3418
3419 /*
3420 * If we only have an RSA-PSS certificate allow RSA authentication
3421 * if TLS 1.2 and peer supports it.
3422 */
3423
3424 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN)
3425 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN
3426 && TLS1_get_version(s) == TLS1_2_VERSION))
3427 mask_a |= SSL_aRSA;
3428
3429 if (dsa_sign) {
3430 mask_a |= SSL_aDSS;
3431 }
3432
3433 mask_a |= SSL_aNULL;
3434
3435 /*
3436 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
3437 * depending on the key usage extension.
3438 */
3439 #ifndef OPENSSL_NO_EC
3440 if (have_ecc_cert) {
3441 uint32_t ex_kusage;
3442 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
3443 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
3444 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
3445 ecdsa_ok = 0;
3446 if (ecdsa_ok)
3447 mask_a |= SSL_aECDSA;
3448 }
3449 /* Allow Ed25519 for TLS 1.2 if peer supports it */
3450 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519)
3451 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
3452 && TLS1_get_version(s) == TLS1_2_VERSION)
3453 mask_a |= SSL_aECDSA;
3454
3455 /* Allow Ed448 for TLS 1.2 if peer supports it */
3456 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448)
3457 && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN
3458 && TLS1_get_version(s) == TLS1_2_VERSION)
3459 mask_a |= SSL_aECDSA;
3460 #endif
3461
3462 #ifndef OPENSSL_NO_EC
3463 mask_k |= SSL_kECDHE;
3464 #endif
3465
3466 #ifndef OPENSSL_NO_PSK
3467 mask_k |= SSL_kPSK;
3468 mask_a |= SSL_aPSK;
3469 if (mask_k & SSL_kRSA)
3470 mask_k |= SSL_kRSAPSK;
3471 if (mask_k & SSL_kDHE)
3472 mask_k |= SSL_kDHEPSK;
3473 if (mask_k & SSL_kECDHE)
3474 mask_k |= SSL_kECDHEPSK;
3475 #endif
3476
3477 s->s3->tmp.mask_k = mask_k;
3478 s->s3->tmp.mask_a = mask_a;
3479 }
3480
3481 #ifndef OPENSSL_NO_EC
3482
ssl_check_srvr_ecc_cert_and_alg(X509 * x,SSL * s)3483 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
3484 {
3485 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
3486 /* key usage, if present, must allow signing */
3487 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
3488 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
3489 SSL_R_ECC_CERT_NOT_FOR_SIGNING);
3490 return 0;
3491 }
3492 }
3493 return 1; /* all checks are ok */
3494 }
3495
3496 #endif
3497
ssl_get_server_cert_serverinfo(SSL * s,const unsigned char ** serverinfo,size_t * serverinfo_length)3498 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
3499 size_t *serverinfo_length)
3500 {
3501 CERT_PKEY *cpk = s->s3->tmp.cert;
3502 *serverinfo_length = 0;
3503
3504 if (cpk == NULL || cpk->serverinfo == NULL)
3505 return 0;
3506
3507 *serverinfo = cpk->serverinfo;
3508 *serverinfo_length = cpk->serverinfo_length;
3509 return 1;
3510 }
3511
ssl_update_cache(SSL * s,int mode)3512 void ssl_update_cache(SSL *s, int mode)
3513 {
3514 int i;
3515
3516 /*
3517 * If the session_id_length is 0, we are not supposed to cache it, and it
3518 * would be rather hard to do anyway :-)
3519 */
3520 if (s->session->session_id_length == 0)
3521 return;
3522
3523 /*
3524 * If sid_ctx_length is 0 there is no specific application context
3525 * associated with this session, so when we try to resume it and
3526 * SSL_VERIFY_PEER is requested to verify the client identity, we have no
3527 * indication that this is actually a session for the proper application
3528 * context, and the *handshake* will fail, not just the resumption attempt.
3529 * Do not cache (on the server) these sessions that are not resumable
3530 * (clients can set SSL_VERIFY_PEER without needing a sid_ctx set).
3531 */
3532 if (s->server && s->session->sid_ctx_length == 0
3533 && (s->verify_mode & SSL_VERIFY_PEER) != 0)
3534 return;
3535
3536 i = s->session_ctx->session_cache_mode;
3537 if ((i & mode) != 0
3538 && (!s->hit || SSL_IS_TLS13(s))) {
3539 /*
3540 * Add the session to the internal cache. In server side TLSv1.3 we
3541 * normally don't do this because by default it's a full stateless ticket
3542 * with only a dummy session id so there is no reason to cache it,
3543 * unless:
3544 * - we are doing early_data, in which case we cache so that we can
3545 * detect replays
3546 * - the application has set a remove_session_cb so needs to know about
3547 * session timeout events
3548 * - SSL_OP_NO_TICKET is set in which case it is a stateful ticket
3549 */
3550 if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0
3551 && (!SSL_IS_TLS13(s)
3552 || !s->server
3553 || (s->max_early_data > 0
3554 && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)
3555 || s->session_ctx->remove_session_cb != NULL
3556 || (s->options & SSL_OP_NO_TICKET) != 0))
3557 SSL_CTX_add_session(s->session_ctx, s->session);
3558
3559 /*
3560 * Add the session to the external cache. We do this even in server side
3561 * TLSv1.3 without early data because some applications just want to
3562 * know about the creation of a session and aren't doing a full cache.
3563 */
3564 if (s->session_ctx->new_session_cb != NULL) {
3565 SSL_SESSION_up_ref(s->session);
3566 if (!s->session_ctx->new_session_cb(s, s->session))
3567 SSL_SESSION_free(s->session);
3568 }
3569 }
3570
3571 /* auto flush every 255 connections */
3572 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
3573 TSAN_QUALIFIER int *stat;
3574 if (mode & SSL_SESS_CACHE_CLIENT)
3575 stat = &s->session_ctx->stats.sess_connect_good;
3576 else
3577 stat = &s->session_ctx->stats.sess_accept_good;
3578 if ((tsan_load(stat) & 0xff) == 0xff)
3579 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
3580 }
3581 }
3582
SSL_CTX_get_ssl_method(const SSL_CTX * ctx)3583 const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx)
3584 {
3585 return ctx->method;
3586 }
3587
SSL_get_ssl_method(const SSL * s)3588 const SSL_METHOD *SSL_get_ssl_method(const SSL *s)
3589 {
3590 return s->method;
3591 }
3592
SSL_set_ssl_method(SSL * s,const SSL_METHOD * meth)3593 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
3594 {
3595 int ret = 1;
3596
3597 if (s->method != meth) {
3598 const SSL_METHOD *sm = s->method;
3599 int (*hf) (SSL *) = s->handshake_func;
3600
3601 if (sm->version == meth->version)
3602 s->method = meth;
3603 else {
3604 sm->ssl_free(s);
3605 s->method = meth;
3606 ret = s->method->ssl_new(s);
3607 }
3608
3609 if (hf == sm->ssl_connect)
3610 s->handshake_func = meth->ssl_connect;
3611 else if (hf == sm->ssl_accept)
3612 s->handshake_func = meth->ssl_accept;
3613 }
3614 return ret;
3615 }
3616
SSL_get_error(const SSL * s,int i)3617 int SSL_get_error(const SSL *s, int i)
3618 {
3619 int reason;
3620 unsigned long l;
3621 BIO *bio;
3622
3623 if (i > 0)
3624 return SSL_ERROR_NONE;
3625
3626 /*
3627 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
3628 * where we do encode the error
3629 */
3630 if ((l = ERR_peek_error()) != 0) {
3631 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
3632 return SSL_ERROR_SYSCALL;
3633 else
3634 return SSL_ERROR_SSL;
3635 }
3636
3637 if (SSL_want_read(s)) {
3638 bio = SSL_get_rbio(s);
3639 if (BIO_should_read(bio))
3640 return SSL_ERROR_WANT_READ;
3641 else if (BIO_should_write(bio))
3642 /*
3643 * This one doesn't make too much sense ... We never try to write
3644 * to the rbio, and an application program where rbio and wbio
3645 * are separate couldn't even know what it should wait for.
3646 * However if we ever set s->rwstate incorrectly (so that we have
3647 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
3648 * wbio *are* the same, this test works around that bug; so it
3649 * might be safer to keep it.
3650 */
3651 return SSL_ERROR_WANT_WRITE;
3652 else if (BIO_should_io_special(bio)) {
3653 reason = BIO_get_retry_reason(bio);
3654 if (reason == BIO_RR_CONNECT)
3655 return SSL_ERROR_WANT_CONNECT;
3656 else if (reason == BIO_RR_ACCEPT)
3657 return SSL_ERROR_WANT_ACCEPT;
3658 else
3659 return SSL_ERROR_SYSCALL; /* unknown */
3660 }
3661 }
3662
3663 if (SSL_want_write(s)) {
3664 /* Access wbio directly - in order to use the buffered bio if present */
3665 bio = s->wbio;
3666 if (BIO_should_write(bio))
3667 return SSL_ERROR_WANT_WRITE;
3668 else if (BIO_should_read(bio))
3669 /*
3670 * See above (SSL_want_read(s) with BIO_should_write(bio))
3671 */
3672 return SSL_ERROR_WANT_READ;
3673 else if (BIO_should_io_special(bio)) {
3674 reason = BIO_get_retry_reason(bio);
3675 if (reason == BIO_RR_CONNECT)
3676 return SSL_ERROR_WANT_CONNECT;
3677 else if (reason == BIO_RR_ACCEPT)
3678 return SSL_ERROR_WANT_ACCEPT;
3679 else
3680 return SSL_ERROR_SYSCALL;
3681 }
3682 }
3683 if (SSL_want_x509_lookup(s))
3684 return SSL_ERROR_WANT_X509_LOOKUP;
3685 if (SSL_want_async(s))
3686 return SSL_ERROR_WANT_ASYNC;
3687 if (SSL_want_async_job(s))
3688 return SSL_ERROR_WANT_ASYNC_JOB;
3689 if (SSL_want_client_hello_cb(s))
3690 return SSL_ERROR_WANT_CLIENT_HELLO_CB;
3691
3692 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
3693 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
3694 return SSL_ERROR_ZERO_RETURN;
3695
3696 return SSL_ERROR_SYSCALL;
3697 }
3698
ssl_do_handshake_intern(void * vargs)3699 static int ssl_do_handshake_intern(void *vargs)
3700 {
3701 struct ssl_async_args *args;
3702 SSL *s;
3703
3704 args = (struct ssl_async_args *)vargs;
3705 s = args->s;
3706
3707 return s->handshake_func(s);
3708 }
3709
SSL_do_handshake(SSL * s)3710 int SSL_do_handshake(SSL *s)
3711 {
3712 int ret = 1;
3713
3714 if (s->handshake_func == NULL) {
3715 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET);
3716 return -1;
3717 }
3718
3719 ossl_statem_check_finish_init(s, -1);
3720
3721 s->method->ssl_renegotiate_check(s, 0);
3722
3723 if (SSL_in_init(s) || SSL_in_before(s)) {
3724 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
3725 struct ssl_async_args args;
3726
3727 memset(&args, 0, sizeof(args));
3728 args.s = s;
3729
3730 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
3731 } else {
3732 ret = s->handshake_func(s);
3733 }
3734 }
3735 return ret;
3736 }
3737
SSL_set_accept_state(SSL * s)3738 void SSL_set_accept_state(SSL *s)
3739 {
3740 s->server = 1;
3741 s->shutdown = 0;
3742 ossl_statem_clear(s);
3743 s->handshake_func = s->method->ssl_accept;
3744 clear_ciphers(s);
3745 }
3746
SSL_set_connect_state(SSL * s)3747 void SSL_set_connect_state(SSL *s)
3748 {
3749 s->server = 0;
3750 s->shutdown = 0;
3751 ossl_statem_clear(s);
3752 s->handshake_func = s->method->ssl_connect;
3753 clear_ciphers(s);
3754 }
3755
ssl_undefined_function(SSL * s)3756 int ssl_undefined_function(SSL *s)
3757 {
3758 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3759 return 0;
3760 }
3761
ssl_undefined_void_function(void)3762 int ssl_undefined_void_function(void)
3763 {
3764 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
3765 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3766 return 0;
3767 }
3768
ssl_undefined_const_function(const SSL * s)3769 int ssl_undefined_const_function(const SSL *s)
3770 {
3771 return 0;
3772 }
3773
ssl_bad_method(int ver)3774 const SSL_METHOD *ssl_bad_method(int ver)
3775 {
3776 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3777 return NULL;
3778 }
3779
ssl_protocol_to_string(int version)3780 const char *ssl_protocol_to_string(int version)
3781 {
3782 switch(version)
3783 {
3784 case TLS1_3_VERSION:
3785 return "TLSv1.3";
3786
3787 case TLS1_2_VERSION:
3788 return "TLSv1.2";
3789
3790 case TLS1_1_VERSION:
3791 return "TLSv1.1";
3792
3793 case TLS1_VERSION:
3794 return "TLSv1";
3795
3796 case SSL3_VERSION:
3797 return "SSLv3";
3798
3799 case DTLS1_BAD_VER:
3800 return "DTLSv0.9";
3801
3802 case DTLS1_VERSION:
3803 return "DTLSv1";
3804
3805 case DTLS1_2_VERSION:
3806 return "DTLSv1.2";
3807
3808 default:
3809 return "unknown";
3810 }
3811 }
3812
SSL_get_version(const SSL * s)3813 const char *SSL_get_version(const SSL *s)
3814 {
3815 return ssl_protocol_to_string(s->version);
3816 }
3817
dup_ca_names(STACK_OF (X509_NAME)** dst,STACK_OF (X509_NAME)* src)3818 static int dup_ca_names(STACK_OF(X509_NAME) **dst, STACK_OF(X509_NAME) *src)
3819 {
3820 STACK_OF(X509_NAME) *sk;
3821 X509_NAME *xn;
3822 int i;
3823
3824 if (src == NULL) {
3825 *dst = NULL;
3826 return 1;
3827 }
3828
3829 if ((sk = sk_X509_NAME_new_null()) == NULL)
3830 return 0;
3831 for (i = 0; i < sk_X509_NAME_num(src); i++) {
3832 xn = X509_NAME_dup(sk_X509_NAME_value(src, i));
3833 if (xn == NULL) {
3834 sk_X509_NAME_pop_free(sk, X509_NAME_free);
3835 return 0;
3836 }
3837 if (sk_X509_NAME_insert(sk, xn, i) == 0) {
3838 X509_NAME_free(xn);
3839 sk_X509_NAME_pop_free(sk, X509_NAME_free);
3840 return 0;
3841 }
3842 }
3843 *dst = sk;
3844
3845 return 1;
3846 }
3847
SSL_dup(SSL * s)3848 SSL *SSL_dup(SSL *s)
3849 {
3850 SSL *ret;
3851 int i;
3852
3853 /* If we're not quiescent, just up_ref! */
3854 if (!SSL_in_init(s) || !SSL_in_before(s)) {
3855 CRYPTO_UP_REF(&s->references, &i, s->lock);
3856 return s;
3857 }
3858
3859 /*
3860 * Otherwise, copy configuration state, and session if set.
3861 */
3862 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
3863 return NULL;
3864
3865 if (s->session != NULL) {
3866 /*
3867 * Arranges to share the same session via up_ref. This "copies"
3868 * session-id, SSL_METHOD, sid_ctx, and 'cert'
3869 */
3870 if (!SSL_copy_session_id(ret, s))
3871 goto err;
3872 } else {
3873 /*
3874 * No session has been established yet, so we have to expect that
3875 * s->cert or ret->cert will be changed later -- they should not both
3876 * point to the same object, and thus we can't use
3877 * SSL_copy_session_id.
3878 */
3879 if (!SSL_set_ssl_method(ret, s->method))
3880 goto err;
3881
3882 if (s->cert != NULL) {
3883 ssl_cert_free(ret->cert);
3884 ret->cert = ssl_cert_dup(s->cert);
3885 if (ret->cert == NULL)
3886 goto err;
3887 }
3888
3889 if (!SSL_set_session_id_context(ret, s->sid_ctx,
3890 (int)s->sid_ctx_length))
3891 goto err;
3892 }
3893
3894 if (!ssl_dane_dup(ret, s))
3895 goto err;
3896 ret->version = s->version;
3897 ret->options = s->options;
3898 ret->min_proto_version = s->min_proto_version;
3899 ret->max_proto_version = s->max_proto_version;
3900 ret->mode = s->mode;
3901 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
3902 SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
3903 ret->msg_callback = s->msg_callback;
3904 ret->msg_callback_arg = s->msg_callback_arg;
3905 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
3906 SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
3907 ret->generate_session_id = s->generate_session_id;
3908
3909 SSL_set_info_callback(ret, SSL_get_info_callback(s));
3910
3911 /* copy app data, a little dangerous perhaps */
3912 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
3913 goto err;
3914
3915 ret->server = s->server;
3916 if (s->handshake_func) {
3917 if (s->server)
3918 SSL_set_accept_state(ret);
3919 else
3920 SSL_set_connect_state(ret);
3921 }
3922 ret->shutdown = s->shutdown;
3923 ret->hit = s->hit;
3924
3925 ret->default_passwd_callback = s->default_passwd_callback;
3926 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;
3927
3928 X509_VERIFY_PARAM_inherit(ret->param, s->param);
3929
3930 /* dup the cipher_list and cipher_list_by_id stacks */
3931 if (s->cipher_list != NULL) {
3932 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
3933 goto err;
3934 }
3935 if (s->cipher_list_by_id != NULL)
3936 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id))
3937 == NULL)
3938 goto err;
3939
3940 /* Dup the client_CA list */
3941 if (!dup_ca_names(&ret->ca_names, s->ca_names)
3942 || !dup_ca_names(&ret->client_ca_names, s->client_ca_names))
3943 goto err;
3944
3945 return ret;
3946
3947 err:
3948 SSL_free(ret);
3949 return NULL;
3950 }
3951
ssl_clear_cipher_ctx(SSL * s)3952 void ssl_clear_cipher_ctx(SSL *s)
3953 {
3954 if (s->enc_read_ctx != NULL) {
3955 EVP_CIPHER_CTX_free(s->enc_read_ctx);
3956 s->enc_read_ctx = NULL;
3957 }
3958 if (s->enc_write_ctx != NULL) {
3959 EVP_CIPHER_CTX_free(s->enc_write_ctx);
3960 s->enc_write_ctx = NULL;
3961 }
3962 #ifndef OPENSSL_NO_COMP
3963 COMP_CTX_free(s->expand);
3964 s->expand = NULL;
3965 COMP_CTX_free(s->compress);
3966 s->compress = NULL;
3967 #endif
3968 }
3969
SSL_get_certificate(const SSL * s)3970 X509 *SSL_get_certificate(const SSL *s)
3971 {
3972 if (s->cert != NULL)
3973 return s->cert->key->x509;
3974 else
3975 return NULL;
3976 }
3977
SSL_get_privatekey(const SSL * s)3978 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3979 {
3980 if (s->cert != NULL)
3981 return s->cert->key->privatekey;
3982 else
3983 return NULL;
3984 }
3985
SSL_CTX_get0_certificate(const SSL_CTX * ctx)3986 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3987 {
3988 if (ctx->cert != NULL)
3989 return ctx->cert->key->x509;
3990 else
3991 return NULL;
3992 }
3993
SSL_CTX_get0_privatekey(const SSL_CTX * ctx)3994 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3995 {
3996 if (ctx->cert != NULL)
3997 return ctx->cert->key->privatekey;
3998 else
3999 return NULL;
4000 }
4001
SSL_get_current_cipher(const SSL * s)4002 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
4003 {
4004 if ((s->session != NULL) && (s->session->cipher != NULL))
4005 return s->session->cipher;
4006 return NULL;
4007 }
4008
SSL_get_pending_cipher(const SSL * s)4009 const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s)
4010 {
4011 return s->s3->tmp.new_cipher;
4012 }
4013
SSL_get_current_compression(const SSL * s)4014 const COMP_METHOD *SSL_get_current_compression(const SSL *s)
4015 {
4016 #ifndef OPENSSL_NO_COMP
4017 return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
4018 #else
4019 return NULL;
4020 #endif
4021 }
4022
SSL_get_current_expansion(const SSL * s)4023 const COMP_METHOD *SSL_get_current_expansion(const SSL *s)
4024 {
4025 #ifndef OPENSSL_NO_COMP
4026 return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
4027 #else
4028 return NULL;
4029 #endif
4030 }
4031
ssl_init_wbio_buffer(SSL * s)4032 int ssl_init_wbio_buffer(SSL *s)
4033 {
4034 BIO *bbio;
4035
4036 if (s->bbio != NULL) {
4037 /* Already buffered. */
4038 return 1;
4039 }
4040
4041 bbio = BIO_new(BIO_f_buffer());
4042 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) {
4043 BIO_free(bbio);
4044 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB);
4045 return 0;
4046 }
4047 s->bbio = bbio;
4048 s->wbio = BIO_push(bbio, s->wbio);
4049
4050 return 1;
4051 }
4052
ssl_free_wbio_buffer(SSL * s)4053 int ssl_free_wbio_buffer(SSL *s)
4054 {
4055 /* callers ensure s is never null */
4056 if (s->bbio == NULL)
4057 return 1;
4058
4059 s->wbio = BIO_pop(s->wbio);
4060 BIO_free(s->bbio);
4061 s->bbio = NULL;
4062
4063 return 1;
4064 }
4065
SSL_CTX_set_quiet_shutdown(SSL_CTX * ctx,int mode)4066 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
4067 {
4068 ctx->quiet_shutdown = mode;
4069 }
4070
SSL_CTX_get_quiet_shutdown(const SSL_CTX * ctx)4071 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
4072 {
4073 return ctx->quiet_shutdown;
4074 }
4075
SSL_set_quiet_shutdown(SSL * s,int mode)4076 void SSL_set_quiet_shutdown(SSL *s, int mode)
4077 {
4078 s->quiet_shutdown = mode;
4079 }
4080
SSL_get_quiet_shutdown(const SSL * s)4081 int SSL_get_quiet_shutdown(const SSL *s)
4082 {
4083 return s->quiet_shutdown;
4084 }
4085
SSL_set_shutdown(SSL * s,int mode)4086 void SSL_set_shutdown(SSL *s, int mode)
4087 {
4088 s->shutdown = mode;
4089 }
4090
SSL_get_shutdown(const SSL * s)4091 int SSL_get_shutdown(const SSL *s)
4092 {
4093 return s->shutdown;
4094 }
4095
SSL_version(const SSL * s)4096 int SSL_version(const SSL *s)
4097 {
4098 return s->version;
4099 }
4100
SSL_client_version(const SSL * s)4101 int SSL_client_version(const SSL *s)
4102 {
4103 return s->client_version;
4104 }
4105
SSL_get_SSL_CTX(const SSL * ssl)4106 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
4107 {
4108 return ssl->ctx;
4109 }
4110
SSL_set_SSL_CTX(SSL * ssl,SSL_CTX * ctx)4111 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
4112 {
4113 CERT *new_cert;
4114 if (ssl->ctx == ctx)
4115 return ssl->ctx;
4116 if (ctx == NULL)
4117 ctx = ssl->session_ctx;
4118 new_cert = ssl_cert_dup(ctx->cert);
4119 if (new_cert == NULL) {
4120 return NULL;
4121 }
4122
4123 if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) {
4124 ssl_cert_free(new_cert);
4125 return NULL;
4126 }
4127
4128 ssl_cert_free(ssl->cert);
4129 ssl->cert = new_cert;
4130
4131 /*
4132 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
4133 * so setter APIs must prevent invalid lengths from entering the system.
4134 */
4135 if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)))
4136 return NULL;
4137
4138 /*
4139 * If the session ID context matches that of the parent SSL_CTX,
4140 * inherit it from the new SSL_CTX as well. If however the context does
4141 * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
4142 * leave it unchanged.
4143 */
4144 if ((ssl->ctx != NULL) &&
4145 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
4146 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) {
4147 ssl->sid_ctx_length = ctx->sid_ctx_length;
4148 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
4149 }
4150
4151 SSL_CTX_up_ref(ctx);
4152 SSL_CTX_free(ssl->ctx); /* decrement reference count */
4153 ssl->ctx = ctx;
4154
4155 return ssl->ctx;
4156 }
4157
SSL_CTX_set_default_verify_paths(SSL_CTX * ctx)4158 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
4159 {
4160 return X509_STORE_set_default_paths(ctx->cert_store);
4161 }
4162
SSL_CTX_set_default_verify_dir(SSL_CTX * ctx)4163 int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
4164 {
4165 X509_LOOKUP *lookup;
4166
4167 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
4168 if (lookup == NULL)
4169 return 0;
4170 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
4171
4172 /* Clear any errors if the default directory does not exist */
4173 ERR_clear_error();
4174
4175 return 1;
4176 }
4177
SSL_CTX_set_default_verify_file(SSL_CTX * ctx)4178 int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
4179 {
4180 X509_LOOKUP *lookup;
4181
4182 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
4183 if (lookup == NULL)
4184 return 0;
4185
4186 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
4187
4188 /* Clear any errors if the default file does not exist */
4189 ERR_clear_error();
4190
4191 return 1;
4192 }
4193
SSL_CTX_load_verify_locations(SSL_CTX * ctx,const char * CAfile,const char * CApath)4194 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
4195 const char *CApath)
4196 {
4197 return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath);
4198 }
4199
SSL_set_info_callback(SSL * ssl,void (* cb)(const SSL * ssl,int type,int val))4200 void SSL_set_info_callback(SSL *ssl,
4201 void (*cb) (const SSL *ssl, int type, int val))
4202 {
4203 ssl->info_callback = cb;
4204 }
4205
4206 /*
4207 * One compiler (Diab DCC) doesn't like argument names in returned function
4208 * pointer.
4209 */
SSL_get_info_callback(const SSL * ssl)4210 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
4211 int /* type */ ,
4212 int /* val */ ) {
4213 return ssl->info_callback;
4214 }
4215
SSL_set_verify_result(SSL * ssl,long arg)4216 void SSL_set_verify_result(SSL *ssl, long arg)
4217 {
4218 ssl->verify_result = arg;
4219 }
4220
SSL_get_verify_result(const SSL * ssl)4221 long SSL_get_verify_result(const SSL *ssl)
4222 {
4223 return ssl->verify_result;
4224 }
4225
SSL_get_client_random(const SSL * ssl,unsigned char * out,size_t outlen)4226 size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
4227 {
4228 if (outlen == 0)
4229 return sizeof(ssl->s3->client_random);
4230 if (outlen > sizeof(ssl->s3->client_random))
4231 outlen = sizeof(ssl->s3->client_random);
4232 memcpy(out, ssl->s3->client_random, outlen);
4233 return outlen;
4234 }
4235
SSL_get_server_random(const SSL * ssl,unsigned char * out,size_t outlen)4236 size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
4237 {
4238 if (outlen == 0)
4239 return sizeof(ssl->s3->server_random);
4240 if (outlen > sizeof(ssl->s3->server_random))
4241 outlen = sizeof(ssl->s3->server_random);
4242 memcpy(out, ssl->s3->server_random, outlen);
4243 return outlen;
4244 }
4245
SSL_SESSION_get_master_key(const SSL_SESSION * session,unsigned char * out,size_t outlen)4246 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
4247 unsigned char *out, size_t outlen)
4248 {
4249 if (outlen == 0)
4250 return session->master_key_length;
4251 if (outlen > session->master_key_length)
4252 outlen = session->master_key_length;
4253 memcpy(out, session->master_key, outlen);
4254 return outlen;
4255 }
4256
SSL_SESSION_set1_master_key(SSL_SESSION * sess,const unsigned char * in,size_t len)4257 int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in,
4258 size_t len)
4259 {
4260 if (len > sizeof(sess->master_key))
4261 return 0;
4262
4263 memcpy(sess->master_key, in, len);
4264 sess->master_key_length = len;
4265 return 1;
4266 }
4267
4268
SSL_set_ex_data(SSL * s,int idx,void * arg)4269 int SSL_set_ex_data(SSL *s, int idx, void *arg)
4270 {
4271 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4272 }
4273
SSL_get_ex_data(const SSL * s,int idx)4274 void *SSL_get_ex_data(const SSL *s, int idx)
4275 {
4276 return CRYPTO_get_ex_data(&s->ex_data, idx);
4277 }
4278
SSL_CTX_set_ex_data(SSL_CTX * s,int idx,void * arg)4279 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
4280 {
4281 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4282 }
4283
SSL_CTX_get_ex_data(const SSL_CTX * s,int idx)4284 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
4285 {
4286 return CRYPTO_get_ex_data(&s->ex_data, idx);
4287 }
4288
SSL_CTX_get_cert_store(const SSL_CTX * ctx)4289 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
4290 {
4291 return ctx->cert_store;
4292 }
4293
SSL_CTX_set_cert_store(SSL_CTX * ctx,X509_STORE * store)4294 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
4295 {
4296 X509_STORE_free(ctx->cert_store);
4297 ctx->cert_store = store;
4298 }
4299
SSL_CTX_set1_cert_store(SSL_CTX * ctx,X509_STORE * store)4300 void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
4301 {
4302 if (store != NULL)
4303 X509_STORE_up_ref(store);
4304 SSL_CTX_set_cert_store(ctx, store);
4305 }
4306
SSL_want(const SSL * s)4307 int SSL_want(const SSL *s)
4308 {
4309 return s->rwstate;
4310 }
4311
4312 /**
4313 * \brief Set the callback for generating temporary DH keys.
4314 * \param ctx the SSL context.
4315 * \param dh the callback
4316 */
4317
4318 #ifndef OPENSSL_NO_DH
SSL_CTX_set_tmp_dh_callback(SSL_CTX * ctx,DH * (* dh)(SSL * ssl,int is_export,int keylength))4319 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
4320 DH *(*dh) (SSL *ssl, int is_export,
4321 int keylength))
4322 {
4323 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4324 }
4325
SSL_set_tmp_dh_callback(SSL * ssl,DH * (* dh)(SSL * ssl,int is_export,int keylength))4326 void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export,
4327 int keylength))
4328 {
4329 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4330 }
4331 #endif
4332
4333 #ifndef OPENSSL_NO_PSK
SSL_CTX_use_psk_identity_hint(SSL_CTX * ctx,const char * identity_hint)4334 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
4335 {
4336 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4337 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4338 return 0;
4339 }
4340 OPENSSL_free(ctx->cert->psk_identity_hint);
4341 if (identity_hint != NULL) {
4342 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4343 if (ctx->cert->psk_identity_hint == NULL)
4344 return 0;
4345 } else
4346 ctx->cert->psk_identity_hint = NULL;
4347 return 1;
4348 }
4349
SSL_use_psk_identity_hint(SSL * s,const char * identity_hint)4350 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
4351 {
4352 if (s == NULL)
4353 return 0;
4354
4355 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4356 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4357 return 0;
4358 }
4359 OPENSSL_free(s->cert->psk_identity_hint);
4360 if (identity_hint != NULL) {
4361 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4362 if (s->cert->psk_identity_hint == NULL)
4363 return 0;
4364 } else
4365 s->cert->psk_identity_hint = NULL;
4366 return 1;
4367 }
4368
SSL_get_psk_identity_hint(const SSL * s)4369 const char *SSL_get_psk_identity_hint(const SSL *s)
4370 {
4371 if (s == NULL || s->session == NULL)
4372 return NULL;
4373 return s->session->psk_identity_hint;
4374 }
4375
SSL_get_psk_identity(const SSL * s)4376 const char *SSL_get_psk_identity(const SSL *s)
4377 {
4378 if (s == NULL || s->session == NULL)
4379 return NULL;
4380 return s->session->psk_identity;
4381 }
4382
SSL_set_psk_client_callback(SSL * s,SSL_psk_client_cb_func cb)4383 void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
4384 {
4385 s->psk_client_callback = cb;
4386 }
4387
SSL_CTX_set_psk_client_callback(SSL_CTX * ctx,SSL_psk_client_cb_func cb)4388 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
4389 {
4390 ctx->psk_client_callback = cb;
4391 }
4392
SSL_set_psk_server_callback(SSL * s,SSL_psk_server_cb_func cb)4393 void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
4394 {
4395 s->psk_server_callback = cb;
4396 }
4397
SSL_CTX_set_psk_server_callback(SSL_CTX * ctx,SSL_psk_server_cb_func cb)4398 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
4399 {
4400 ctx->psk_server_callback = cb;
4401 }
4402 #endif
4403
SSL_set_psk_find_session_callback(SSL * s,SSL_psk_find_session_cb_func cb)4404 void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb)
4405 {
4406 s->psk_find_session_cb = cb;
4407 }
4408
SSL_CTX_set_psk_find_session_callback(SSL_CTX * ctx,SSL_psk_find_session_cb_func cb)4409 void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
4410 SSL_psk_find_session_cb_func cb)
4411 {
4412 ctx->psk_find_session_cb = cb;
4413 }
4414
SSL_set_psk_use_session_callback(SSL * s,SSL_psk_use_session_cb_func cb)4415 void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
4416 {
4417 s->psk_use_session_cb = cb;
4418 }
4419
SSL_CTX_set_psk_use_session_callback(SSL_CTX * ctx,SSL_psk_use_session_cb_func cb)4420 void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx,
4421 SSL_psk_use_session_cb_func cb)
4422 {
4423 ctx->psk_use_session_cb = cb;
4424 }
4425
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))4426 void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
4427 void (*cb) (int write_p, int version,
4428 int content_type, const void *buf,
4429 size_t len, SSL *ssl, void *arg))
4430 {
4431 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4432 }
4433
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))4434 void SSL_set_msg_callback(SSL *ssl,
4435 void (*cb) (int write_p, int version,
4436 int content_type, const void *buf,
4437 size_t len, SSL *ssl, void *arg))
4438 {
4439 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4440 }
4441
SSL_CTX_set_not_resumable_session_callback(SSL_CTX * ctx,int (* cb)(SSL * ssl,int is_forward_secure))4442 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
4443 int (*cb) (SSL *ssl,
4444 int
4445 is_forward_secure))
4446 {
4447 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4448 (void (*)(void))cb);
4449 }
4450
SSL_set_not_resumable_session_callback(SSL * ssl,int (* cb)(SSL * ssl,int is_forward_secure))4451 void SSL_set_not_resumable_session_callback(SSL *ssl,
4452 int (*cb) (SSL *ssl,
4453 int is_forward_secure))
4454 {
4455 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4456 (void (*)(void))cb);
4457 }
4458
SSL_CTX_set_record_padding_callback(SSL_CTX * ctx,size_t (* cb)(SSL * ssl,int type,size_t len,void * arg))4459 void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx,
4460 size_t (*cb) (SSL *ssl, int type,
4461 size_t len, void *arg))
4462 {
4463 ctx->record_padding_cb = cb;
4464 }
4465
SSL_CTX_set_record_padding_callback_arg(SSL_CTX * ctx,void * arg)4466 void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg)
4467 {
4468 ctx->record_padding_arg = arg;
4469 }
4470
SSL_CTX_get_record_padding_callback_arg(const SSL_CTX * ctx)4471 void *SSL_CTX_get_record_padding_callback_arg(const SSL_CTX *ctx)
4472 {
4473 return ctx->record_padding_arg;
4474 }
4475
SSL_CTX_set_block_padding(SSL_CTX * ctx,size_t block_size)4476 int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size)
4477 {
4478 /* block size of 0 or 1 is basically no padding */
4479 if (block_size == 1)
4480 ctx->block_padding = 0;
4481 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4482 ctx->block_padding = block_size;
4483 else
4484 return 0;
4485 return 1;
4486 }
4487
SSL_set_record_padding_callback(SSL * ssl,size_t (* cb)(SSL * ssl,int type,size_t len,void * arg))4488 void SSL_set_record_padding_callback(SSL *ssl,
4489 size_t (*cb) (SSL *ssl, int type,
4490 size_t len, void *arg))
4491 {
4492 ssl->record_padding_cb = cb;
4493 }
4494
SSL_set_record_padding_callback_arg(SSL * ssl,void * arg)4495 void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg)
4496 {
4497 ssl->record_padding_arg = arg;
4498 }
4499
SSL_get_record_padding_callback_arg(const SSL * ssl)4500 void *SSL_get_record_padding_callback_arg(const SSL *ssl)
4501 {
4502 return ssl->record_padding_arg;
4503 }
4504
SSL_set_block_padding(SSL * ssl,size_t block_size)4505 int SSL_set_block_padding(SSL *ssl, size_t block_size)
4506 {
4507 /* block size of 0 or 1 is basically no padding */
4508 if (block_size == 1)
4509 ssl->block_padding = 0;
4510 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4511 ssl->block_padding = block_size;
4512 else
4513 return 0;
4514 return 1;
4515 }
4516
SSL_set_num_tickets(SSL * s,size_t num_tickets)4517 int SSL_set_num_tickets(SSL *s, size_t num_tickets)
4518 {
4519 s->num_tickets = num_tickets;
4520
4521 return 1;
4522 }
4523
SSL_get_num_tickets(const SSL * s)4524 size_t SSL_get_num_tickets(const SSL *s)
4525 {
4526 return s->num_tickets;
4527 }
4528
SSL_CTX_set_num_tickets(SSL_CTX * ctx,size_t num_tickets)4529 int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets)
4530 {
4531 ctx->num_tickets = num_tickets;
4532
4533 return 1;
4534 }
4535
SSL_CTX_get_num_tickets(const SSL_CTX * ctx)4536 size_t SSL_CTX_get_num_tickets(const SSL_CTX *ctx)
4537 {
4538 return ctx->num_tickets;
4539 }
4540
4541 /*
4542 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
4543 * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
4544 * If EVP_MD pointer is passed, initializes ctx with this |md|.
4545 * Returns the newly allocated ctx;
4546 */
4547
ssl_replace_hash(EVP_MD_CTX ** hash,const EVP_MD * md)4548 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
4549 {
4550 ssl_clear_hash_ctx(hash);
4551 *hash = EVP_MD_CTX_new();
4552 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
4553 EVP_MD_CTX_free(*hash);
4554 *hash = NULL;
4555 return NULL;
4556 }
4557 return *hash;
4558 }
4559
ssl_clear_hash_ctx(EVP_MD_CTX ** hash)4560 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
4561 {
4562
4563 EVP_MD_CTX_free(*hash);
4564 *hash = NULL;
4565 }
4566
4567 /* Retrieve handshake hashes */
ssl_handshake_hash(SSL * s,unsigned char * out,size_t outlen,size_t * hashlen)4568 int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
4569 size_t *hashlen)
4570 {
4571 EVP_MD_CTX *ctx = NULL;
4572 EVP_MD_CTX *hdgst = s->s3->handshake_dgst;
4573 int hashleni = EVP_MD_CTX_size(hdgst);
4574 int ret = 0;
4575
4576 if (hashleni < 0 || (size_t)hashleni > outlen) {
4577 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4578 ERR_R_INTERNAL_ERROR);
4579 goto err;
4580 }
4581
4582 ctx = EVP_MD_CTX_new();
4583 if (ctx == NULL) {
4584 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4585 ERR_R_INTERNAL_ERROR);
4586 goto err;
4587 }
4588
4589 if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
4590 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) {
4591 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4592 ERR_R_INTERNAL_ERROR);
4593 goto err;
4594 }
4595
4596 *hashlen = hashleni;
4597
4598 ret = 1;
4599 err:
4600 EVP_MD_CTX_free(ctx);
4601 return ret;
4602 }
4603
SSL_session_reused(const SSL * s)4604 int SSL_session_reused(const SSL *s)
4605 {
4606 return s->hit;
4607 }
4608
SSL_is_server(const SSL * s)4609 int SSL_is_server(const SSL *s)
4610 {
4611 return s->server;
4612 }
4613
4614 #if OPENSSL_API_COMPAT < 0x10100000L
SSL_set_debug(SSL * s,int debug)4615 void SSL_set_debug(SSL *s, int debug)
4616 {
4617 /* Old function was do-nothing anyway... */
4618 (void)s;
4619 (void)debug;
4620 }
4621 #endif
4622
SSL_set_security_level(SSL * s,int level)4623 void SSL_set_security_level(SSL *s, int level)
4624 {
4625 s->cert->sec_level = level;
4626 }
4627
SSL_get_security_level(const SSL * s)4628 int SSL_get_security_level(const SSL *s)
4629 {
4630 return s->cert->sec_level;
4631 }
4632
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))4633 void SSL_set_security_callback(SSL *s,
4634 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4635 int op, int bits, int nid,
4636 void *other, void *ex))
4637 {
4638 s->cert->sec_cb = cb;
4639 }
4640
SSL_get_security_callback(const SSL * s)4641 int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
4642 const SSL_CTX *ctx, int op,
4643 int bits, int nid, void *other,
4644 void *ex) {
4645 return s->cert->sec_cb;
4646 }
4647
SSL_set0_security_ex_data(SSL * s,void * ex)4648 void SSL_set0_security_ex_data(SSL *s, void *ex)
4649 {
4650 s->cert->sec_ex = ex;
4651 }
4652
SSL_get0_security_ex_data(const SSL * s)4653 void *SSL_get0_security_ex_data(const SSL *s)
4654 {
4655 return s->cert->sec_ex;
4656 }
4657
SSL_CTX_set_security_level(SSL_CTX * ctx,int level)4658 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
4659 {
4660 ctx->cert->sec_level = level;
4661 }
4662
SSL_CTX_get_security_level(const SSL_CTX * ctx)4663 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
4664 {
4665 return ctx->cert->sec_level;
4666 }
4667
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))4668 void SSL_CTX_set_security_callback(SSL_CTX *ctx,
4669 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4670 int op, int bits, int nid,
4671 void *other, void *ex))
4672 {
4673 ctx->cert->sec_cb = cb;
4674 }
4675
SSL_CTX_get_security_callback(const SSL_CTX * ctx)4676 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
4677 const SSL_CTX *ctx,
4678 int op, int bits,
4679 int nid,
4680 void *other,
4681 void *ex) {
4682 return ctx->cert->sec_cb;
4683 }
4684
SSL_CTX_set0_security_ex_data(SSL_CTX * ctx,void * ex)4685 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
4686 {
4687 ctx->cert->sec_ex = ex;
4688 }
4689
SSL_CTX_get0_security_ex_data(const SSL_CTX * ctx)4690 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
4691 {
4692 return ctx->cert->sec_ex;
4693 }
4694
4695 /*
4696 * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that
4697 * can return unsigned long, instead of the generic long return value from the
4698 * control interface.
4699 */
SSL_CTX_get_options(const SSL_CTX * ctx)4700 unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
4701 {
4702 return ctx->options;
4703 }
4704
SSL_get_options(const SSL * s)4705 unsigned long SSL_get_options(const SSL *s)
4706 {
4707 return s->options;
4708 }
4709
SSL_CTX_set_options(SSL_CTX * ctx,unsigned long op)4710 unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op)
4711 {
4712 return ctx->options |= op;
4713 }
4714
SSL_set_options(SSL * s,unsigned long op)4715 unsigned long SSL_set_options(SSL *s, unsigned long op)
4716 {
4717 return s->options |= op;
4718 }
4719
SSL_CTX_clear_options(SSL_CTX * ctx,unsigned long op)4720 unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op)
4721 {
4722 return ctx->options &= ~op;
4723 }
4724
SSL_clear_options(SSL * s,unsigned long op)4725 unsigned long SSL_clear_options(SSL *s, unsigned long op)
4726 {
4727 return s->options &= ~op;
4728 }
4729
STACK_OF(X509)4730 STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
4731 {
4732 return s->verified_chain;
4733 }
4734
4735 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
4736
4737 #ifndef OPENSSL_NO_CT
4738
4739 /*
4740 * Moves SCTs from the |src| stack to the |dst| stack.
4741 * The source of each SCT will be set to |origin|.
4742 * If |dst| points to a NULL pointer, a new stack will be created and owned by
4743 * the caller.
4744 * Returns the number of SCTs moved, or a negative integer if an error occurs.
4745 */
ct_move_scts(STACK_OF (SCT)** dst,STACK_OF (SCT)* src,sct_source_t origin)4746 static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
4747 sct_source_t origin)
4748 {
4749 int scts_moved = 0;
4750 SCT *sct = NULL;
4751
4752 if (*dst == NULL) {
4753 *dst = sk_SCT_new_null();
4754 if (*dst == NULL) {
4755 SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE);
4756 goto err;
4757 }
4758 }
4759
4760 while ((sct = sk_SCT_pop(src)) != NULL) {
4761 if (SCT_set_source(sct, origin) != 1)
4762 goto err;
4763
4764 if (sk_SCT_push(*dst, sct) <= 0)
4765 goto err;
4766 scts_moved += 1;
4767 }
4768
4769 return scts_moved;
4770 err:
4771 if (sct != NULL)
4772 sk_SCT_push(src, sct); /* Put the SCT back */
4773 return -1;
4774 }
4775
4776 /*
4777 * Look for data collected during ServerHello and parse if found.
4778 * Returns the number of SCTs extracted.
4779 */
ct_extract_tls_extension_scts(SSL * s)4780 static int ct_extract_tls_extension_scts(SSL *s)
4781 {
4782 int scts_extracted = 0;
4783
4784 if (s->ext.scts != NULL) {
4785 const unsigned char *p = s->ext.scts;
4786 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
4787
4788 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
4789
4790 SCT_LIST_free(scts);
4791 }
4792
4793 return scts_extracted;
4794 }
4795
4796 /*
4797 * Checks for an OCSP response and then attempts to extract any SCTs found if it
4798 * contains an SCT X509 extension. They will be stored in |s->scts|.
4799 * Returns:
4800 * - The number of SCTs extracted, assuming an OCSP response exists.
4801 * - 0 if no OCSP response exists or it contains no SCTs.
4802 * - A negative integer if an error occurs.
4803 */
ct_extract_ocsp_response_scts(SSL * s)4804 static int ct_extract_ocsp_response_scts(SSL *s)
4805 {
4806 # ifndef OPENSSL_NO_OCSP
4807 int scts_extracted = 0;
4808 const unsigned char *p;
4809 OCSP_BASICRESP *br = NULL;
4810 OCSP_RESPONSE *rsp = NULL;
4811 STACK_OF(SCT) *scts = NULL;
4812 int i;
4813
4814 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
4815 goto err;
4816
4817 p = s->ext.ocsp.resp;
4818 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
4819 if (rsp == NULL)
4820 goto err;
4821
4822 br = OCSP_response_get1_basic(rsp);
4823 if (br == NULL)
4824 goto err;
4825
4826 for (i = 0; i < OCSP_resp_count(br); ++i) {
4827 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
4828
4829 if (single == NULL)
4830 continue;
4831
4832 scts =
4833 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
4834 scts_extracted =
4835 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
4836 if (scts_extracted < 0)
4837 goto err;
4838 }
4839 err:
4840 SCT_LIST_free(scts);
4841 OCSP_BASICRESP_free(br);
4842 OCSP_RESPONSE_free(rsp);
4843 return scts_extracted;
4844 # else
4845 /* Behave as if no OCSP response exists */
4846 return 0;
4847 # endif
4848 }
4849
4850 /*
4851 * Attempts to extract SCTs from the peer certificate.
4852 * Return the number of SCTs extracted, or a negative integer if an error
4853 * occurs.
4854 */
ct_extract_x509v3_extension_scts(SSL * s)4855 static int ct_extract_x509v3_extension_scts(SSL *s)
4856 {
4857 int scts_extracted = 0;
4858 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4859
4860 if (cert != NULL) {
4861 STACK_OF(SCT) *scts =
4862 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
4863
4864 scts_extracted =
4865 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
4866
4867 SCT_LIST_free(scts);
4868 }
4869
4870 return scts_extracted;
4871 }
4872
4873 /*
4874 * Attempts to find all received SCTs by checking TLS extensions, the OCSP
4875 * response (if it exists) and X509v3 extensions in the certificate.
4876 * Returns NULL if an error occurs.
4877 */
STACK_OF(SCT)4878 const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
4879 {
4880 if (!s->scts_parsed) {
4881 if (ct_extract_tls_extension_scts(s) < 0 ||
4882 ct_extract_ocsp_response_scts(s) < 0 ||
4883 ct_extract_x509v3_extension_scts(s) < 0)
4884 goto err;
4885
4886 s->scts_parsed = 1;
4887 }
4888 return s->scts;
4889 err:
4890 return NULL;
4891 }
4892
ct_permissive(const CT_POLICY_EVAL_CTX * ctx,const STACK_OF (SCT)* scts,void * unused_arg)4893 static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
4894 const STACK_OF(SCT) *scts, void *unused_arg)
4895 {
4896 return 1;
4897 }
4898
ct_strict(const CT_POLICY_EVAL_CTX * ctx,const STACK_OF (SCT)* scts,void * unused_arg)4899 static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
4900 const STACK_OF(SCT) *scts, void *unused_arg)
4901 {
4902 int count = scts != NULL ? sk_SCT_num(scts) : 0;
4903 int i;
4904
4905 for (i = 0; i < count; ++i) {
4906 SCT *sct = sk_SCT_value(scts, i);
4907 int status = SCT_get_validation_status(sct);
4908
4909 if (status == SCT_VALIDATION_STATUS_VALID)
4910 return 1;
4911 }
4912 SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS);
4913 return 0;
4914 }
4915
SSL_set_ct_validation_callback(SSL * s,ssl_ct_validation_cb callback,void * arg)4916 int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
4917 void *arg)
4918 {
4919 /*
4920 * Since code exists that uses the custom extension handler for CT, look
4921 * for this and throw an error if they have already registered to use CT.
4922 */
4923 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
4924 TLSEXT_TYPE_signed_certificate_timestamp))
4925 {
4926 SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK,
4927 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4928 return 0;
4929 }
4930
4931 if (callback != NULL) {
4932 /*
4933 * If we are validating CT, then we MUST accept SCTs served via OCSP
4934 */
4935 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
4936 return 0;
4937 }
4938
4939 s->ct_validation_callback = callback;
4940 s->ct_validation_callback_arg = arg;
4941
4942 return 1;
4943 }
4944
SSL_CTX_set_ct_validation_callback(SSL_CTX * ctx,ssl_ct_validation_cb callback,void * arg)4945 int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
4946 ssl_ct_validation_cb callback, void *arg)
4947 {
4948 /*
4949 * Since code exists that uses the custom extension handler for CT, look for
4950 * this and throw an error if they have already registered to use CT.
4951 */
4952 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
4953 TLSEXT_TYPE_signed_certificate_timestamp))
4954 {
4955 SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK,
4956 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4957 return 0;
4958 }
4959
4960 ctx->ct_validation_callback = callback;
4961 ctx->ct_validation_callback_arg = arg;
4962 return 1;
4963 }
4964
SSL_ct_is_enabled(const SSL * s)4965 int SSL_ct_is_enabled(const SSL *s)
4966 {
4967 return s->ct_validation_callback != NULL;
4968 }
4969
SSL_CTX_ct_is_enabled(const SSL_CTX * ctx)4970 int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
4971 {
4972 return ctx->ct_validation_callback != NULL;
4973 }
4974
ssl_validate_ct(SSL * s)4975 int ssl_validate_ct(SSL *s)
4976 {
4977 int ret = 0;
4978 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4979 X509 *issuer;
4980 SSL_DANE *dane = &s->dane;
4981 CT_POLICY_EVAL_CTX *ctx = NULL;
4982 const STACK_OF(SCT) *scts;
4983
4984 /*
4985 * If no callback is set, the peer is anonymous, or its chain is invalid,
4986 * skip SCT validation - just return success. Applications that continue
4987 * handshakes without certificates, with unverified chains, or pinned leaf
4988 * certificates are outside the scope of the WebPKI and CT.
4989 *
4990 * The above exclusions notwithstanding the vast majority of peers will
4991 * have rather ordinary certificate chains validated by typical
4992 * applications that perform certificate verification and therefore will
4993 * process SCTs when enabled.
4994 */
4995 if (s->ct_validation_callback == NULL || cert == NULL ||
4996 s->verify_result != X509_V_OK ||
4997 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
4998 return 1;
4999
5000 /*
5001 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
5002 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2
5003 */
5004 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
5005 switch (dane->mtlsa->usage) {
5006 case DANETLS_USAGE_DANE_TA:
5007 case DANETLS_USAGE_DANE_EE:
5008 return 1;
5009 }
5010 }
5011
5012 ctx = CT_POLICY_EVAL_CTX_new();
5013 if (ctx == NULL) {
5014 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_VALIDATE_CT,
5015 ERR_R_MALLOC_FAILURE);
5016 goto end;
5017 }
5018
5019 issuer = sk_X509_value(s->verified_chain, 1);
5020 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
5021 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
5022 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store);
5023 CT_POLICY_EVAL_CTX_set_time(
5024 ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000);
5025
5026 scts = SSL_get0_peer_scts(s);
5027
5028 /*
5029 * This function returns success (> 0) only when all the SCTs are valid, 0
5030 * when some are invalid, and < 0 on various internal errors (out of
5031 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient
5032 * reason to abort the handshake, that decision is up to the callback.
5033 * Therefore, we error out only in the unexpected case that the return
5034 * value is negative.
5035 *
5036 * XXX: One might well argue that the return value of this function is an
5037 * unfortunate design choice. Its job is only to determine the validation
5038 * status of each of the provided SCTs. So long as it correctly separates
5039 * the wheat from the chaff it should return success. Failure in this case
5040 * ought to correspond to an inability to carry out its duties.
5041 */
5042 if (SCT_LIST_validate(scts, ctx) < 0) {
5043 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
5044 SSL_R_SCT_VERIFICATION_FAILED);
5045 goto end;
5046 }
5047
5048 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
5049 if (ret < 0)
5050 ret = 0; /* This function returns 0 on failure */
5051 if (!ret)
5052 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
5053 SSL_R_CALLBACK_FAILED);
5054
5055 end:
5056 CT_POLICY_EVAL_CTX_free(ctx);
5057 /*
5058 * With SSL_VERIFY_NONE the session may be cached and re-used despite a
5059 * failure return code here. Also the application may wish the complete
5060 * the handshake, and then disconnect cleanly at a higher layer, after
5061 * checking the verification status of the completed connection.
5062 *
5063 * We therefore force a certificate verification failure which will be
5064 * visible via SSL_get_verify_result() and cached as part of any resumed
5065 * session.
5066 *
5067 * Note: the permissive callback is for information gathering only, always
5068 * returns success, and does not affect verification status. Only the
5069 * strict callback or a custom application-specified callback can trigger
5070 * connection failure or record a verification error.
5071 */
5072 if (ret <= 0)
5073 s->verify_result = X509_V_ERR_NO_VALID_SCTS;
5074 return ret;
5075 }
5076
SSL_CTX_enable_ct(SSL_CTX * ctx,int validation_mode)5077 int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
5078 {
5079 switch (validation_mode) {
5080 default:
5081 SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
5082 return 0;
5083 case SSL_CT_VALIDATION_PERMISSIVE:
5084 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
5085 case SSL_CT_VALIDATION_STRICT:
5086 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
5087 }
5088 }
5089
SSL_enable_ct(SSL * s,int validation_mode)5090 int SSL_enable_ct(SSL *s, int validation_mode)
5091 {
5092 switch (validation_mode) {
5093 default:
5094 SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
5095 return 0;
5096 case SSL_CT_VALIDATION_PERMISSIVE:
5097 return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
5098 case SSL_CT_VALIDATION_STRICT:
5099 return SSL_set_ct_validation_callback(s, ct_strict, NULL);
5100 }
5101 }
5102
SSL_CTX_set_default_ctlog_list_file(SSL_CTX * ctx)5103 int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
5104 {
5105 return CTLOG_STORE_load_default_file(ctx->ctlog_store);
5106 }
5107
SSL_CTX_set_ctlog_list_file(SSL_CTX * ctx,const char * path)5108 int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
5109 {
5110 return CTLOG_STORE_load_file(ctx->ctlog_store, path);
5111 }
5112
SSL_CTX_set0_ctlog_store(SSL_CTX * ctx,CTLOG_STORE * logs)5113 void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
5114 {
5115 CTLOG_STORE_free(ctx->ctlog_store);
5116 ctx->ctlog_store = logs;
5117 }
5118
SSL_CTX_get0_ctlog_store(const SSL_CTX * ctx)5119 const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
5120 {
5121 return ctx->ctlog_store;
5122 }
5123
5124 #endif /* OPENSSL_NO_CT */
5125
SSL_CTX_set_client_hello_cb(SSL_CTX * c,SSL_client_hello_cb_fn cb,void * arg)5126 void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb,
5127 void *arg)
5128 {
5129 c->client_hello_cb = cb;
5130 c->client_hello_cb_arg = arg;
5131 }
5132
SSL_client_hello_isv2(SSL * s)5133 int SSL_client_hello_isv2(SSL *s)
5134 {
5135 if (s->clienthello == NULL)
5136 return 0;
5137 return s->clienthello->isv2;
5138 }
5139
SSL_client_hello_get0_legacy_version(SSL * s)5140 unsigned int SSL_client_hello_get0_legacy_version(SSL *s)
5141 {
5142 if (s->clienthello == NULL)
5143 return 0;
5144 return s->clienthello->legacy_version;
5145 }
5146
SSL_client_hello_get0_random(SSL * s,const unsigned char ** out)5147 size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out)
5148 {
5149 if (s->clienthello == NULL)
5150 return 0;
5151 if (out != NULL)
5152 *out = s->clienthello->random;
5153 return SSL3_RANDOM_SIZE;
5154 }
5155
SSL_client_hello_get0_session_id(SSL * s,const unsigned char ** out)5156 size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out)
5157 {
5158 if (s->clienthello == NULL)
5159 return 0;
5160 if (out != NULL)
5161 *out = s->clienthello->session_id;
5162 return s->clienthello->session_id_len;
5163 }
5164
SSL_client_hello_get0_ciphers(SSL * s,const unsigned char ** out)5165 size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out)
5166 {
5167 if (s->clienthello == NULL)
5168 return 0;
5169 if (out != NULL)
5170 *out = PACKET_data(&s->clienthello->ciphersuites);
5171 return PACKET_remaining(&s->clienthello->ciphersuites);
5172 }
5173
SSL_client_hello_get0_compression_methods(SSL * s,const unsigned char ** out)5174 size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out)
5175 {
5176 if (s->clienthello == NULL)
5177 return 0;
5178 if (out != NULL)
5179 *out = s->clienthello->compressions;
5180 return s->clienthello->compressions_len;
5181 }
5182
SSL_client_hello_get1_extensions_present(SSL * s,int ** out,size_t * outlen)5183 int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen)
5184 {
5185 RAW_EXTENSION *ext;
5186 int *present;
5187 size_t num = 0, i;
5188
5189 if (s->clienthello == NULL || out == NULL || outlen == NULL)
5190 return 0;
5191 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
5192 ext = s->clienthello->pre_proc_exts + i;
5193 if (ext->present)
5194 num++;
5195 }
5196 if (num == 0) {
5197 *out = NULL;
5198 *outlen = 0;
5199 return 1;
5200 }
5201 if ((present = OPENSSL_malloc(sizeof(*present) * num)) == NULL) {
5202 SSLerr(SSL_F_SSL_CLIENT_HELLO_GET1_EXTENSIONS_PRESENT,
5203 ERR_R_MALLOC_FAILURE);
5204 return 0;
5205 }
5206 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
5207 ext = s->clienthello->pre_proc_exts + i;
5208 if (ext->present) {
5209 if (ext->received_order >= num)
5210 goto err;
5211 present[ext->received_order] = ext->type;
5212 }
5213 }
5214 *out = present;
5215 *outlen = num;
5216 return 1;
5217 err:
5218 OPENSSL_free(present);
5219 return 0;
5220 }
5221
SSL_client_hello_get0_ext(SSL * s,unsigned int type,const unsigned char ** out,size_t * outlen)5222 int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
5223 size_t *outlen)
5224 {
5225 size_t i;
5226 RAW_EXTENSION *r;
5227
5228 if (s->clienthello == NULL)
5229 return 0;
5230 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) {
5231 r = s->clienthello->pre_proc_exts + i;
5232 if (r->present && r->type == type) {
5233 if (out != NULL)
5234 *out = PACKET_data(&r->data);
5235 if (outlen != NULL)
5236 *outlen = PACKET_remaining(&r->data);
5237 return 1;
5238 }
5239 }
5240 return 0;
5241 }
5242
SSL_free_buffers(SSL * ssl)5243 int SSL_free_buffers(SSL *ssl)
5244 {
5245 RECORD_LAYER *rl = &ssl->rlayer;
5246
5247 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl))
5248 return 0;
5249
5250 RECORD_LAYER_release(rl);
5251 return 1;
5252 }
5253
SSL_alloc_buffers(SSL * ssl)5254 int SSL_alloc_buffers(SSL *ssl)
5255 {
5256 return ssl3_setup_buffers(ssl);
5257 }
5258
SSL_CTX_set_keylog_callback(SSL_CTX * ctx,SSL_CTX_keylog_cb_func cb)5259 void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
5260 {
5261 ctx->keylog_callback = cb;
5262 }
5263
SSL_CTX_get_keylog_callback(const SSL_CTX * ctx)5264 SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
5265 {
5266 return ctx->keylog_callback;
5267 }
5268
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)5269 static int nss_keylog_int(const char *prefix,
5270 SSL *ssl,
5271 const uint8_t *parameter_1,
5272 size_t parameter_1_len,
5273 const uint8_t *parameter_2,
5274 size_t parameter_2_len)
5275 {
5276 char *out = NULL;
5277 char *cursor = NULL;
5278 size_t out_len = 0;
5279 size_t i;
5280 size_t prefix_len;
5281
5282 if (ssl->ctx->keylog_callback == NULL)
5283 return 1;
5284
5285 /*
5286 * Our output buffer will contain the following strings, rendered with
5287 * space characters in between, terminated by a NULL character: first the
5288 * prefix, then the first parameter, then the second parameter. The
5289 * meaning of each parameter depends on the specific key material being
5290 * logged. Note that the first and second parameters are encoded in
5291 * hexadecimal, so we need a buffer that is twice their lengths.
5292 */
5293 prefix_len = strlen(prefix);
5294 out_len = prefix_len + (2 * parameter_1_len) + (2 * parameter_2_len) + 3;
5295 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
5296 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, SSL_F_NSS_KEYLOG_INT,
5297 ERR_R_MALLOC_FAILURE);
5298 return 0;
5299 }
5300
5301 strcpy(cursor, prefix);
5302 cursor += prefix_len;
5303 *cursor++ = ' ';
5304
5305 for (i = 0; i < parameter_1_len; i++) {
5306 sprintf(cursor, "%02x", parameter_1[i]);
5307 cursor += 2;
5308 }
5309 *cursor++ = ' ';
5310
5311 for (i = 0; i < parameter_2_len; i++) {
5312 sprintf(cursor, "%02x", parameter_2[i]);
5313 cursor += 2;
5314 }
5315 *cursor = '\0';
5316
5317 ssl->ctx->keylog_callback(ssl, (const char *)out);
5318 OPENSSL_clear_free(out, out_len);
5319 return 1;
5320
5321 }
5322
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)5323 int ssl_log_rsa_client_key_exchange(SSL *ssl,
5324 const uint8_t *encrypted_premaster,
5325 size_t encrypted_premaster_len,
5326 const uint8_t *premaster,
5327 size_t premaster_len)
5328 {
5329 if (encrypted_premaster_len < 8) {
5330 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR,
5331 SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
5332 return 0;
5333 }
5334
5335 /* We only want the first 8 bytes of the encrypted premaster as a tag. */
5336 return nss_keylog_int("RSA",
5337 ssl,
5338 encrypted_premaster,
5339 8,
5340 premaster,
5341 premaster_len);
5342 }
5343
ssl_log_secret(SSL * ssl,const char * label,const uint8_t * secret,size_t secret_len)5344 int ssl_log_secret(SSL *ssl,
5345 const char *label,
5346 const uint8_t *secret,
5347 size_t secret_len)
5348 {
5349 return nss_keylog_int(label,
5350 ssl,
5351 ssl->s3->client_random,
5352 SSL3_RANDOM_SIZE,
5353 secret,
5354 secret_len);
5355 }
5356
5357 #define SSLV2_CIPHER_LEN 3
5358
ssl_cache_cipherlist(SSL * s,PACKET * cipher_suites,int sslv2format)5359 int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format)
5360 {
5361 int n;
5362
5363 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5364
5365 if (PACKET_remaining(cipher_suites) == 0) {
5366 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_CACHE_CIPHERLIST,
5367 SSL_R_NO_CIPHERS_SPECIFIED);
5368 return 0;
5369 }
5370
5371 if (PACKET_remaining(cipher_suites) % n != 0) {
5372 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5373 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5374 return 0;
5375 }
5376
5377 OPENSSL_free(s->s3->tmp.ciphers_raw);
5378 s->s3->tmp.ciphers_raw = NULL;
5379 s->s3->tmp.ciphers_rawlen = 0;
5380
5381 if (sslv2format) {
5382 size_t numciphers = PACKET_remaining(cipher_suites) / n;
5383 PACKET sslv2ciphers = *cipher_suites;
5384 unsigned int leadbyte;
5385 unsigned char *raw;
5386
5387 /*
5388 * We store the raw ciphers list in SSLv3+ format so we need to do some
5389 * preprocessing to convert the list first. If there are any SSLv2 only
5390 * ciphersuites with a non-zero leading byte then we are going to
5391 * slightly over allocate because we won't store those. But that isn't a
5392 * problem.
5393 */
5394 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
5395 s->s3->tmp.ciphers_raw = raw;
5396 if (raw == NULL) {
5397 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5398 ERR_R_MALLOC_FAILURE);
5399 return 0;
5400 }
5401 for (s->s3->tmp.ciphers_rawlen = 0;
5402 PACKET_remaining(&sslv2ciphers) > 0;
5403 raw += TLS_CIPHER_LEN) {
5404 if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
5405 || (leadbyte == 0
5406 && !PACKET_copy_bytes(&sslv2ciphers, raw,
5407 TLS_CIPHER_LEN))
5408 || (leadbyte != 0
5409 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
5410 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5411 SSL_R_BAD_PACKET);
5412 OPENSSL_free(s->s3->tmp.ciphers_raw);
5413 s->s3->tmp.ciphers_raw = NULL;
5414 s->s3->tmp.ciphers_rawlen = 0;
5415 return 0;
5416 }
5417 if (leadbyte == 0)
5418 s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN;
5419 }
5420 } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
5421 &s->s3->tmp.ciphers_rawlen)) {
5422 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5423 ERR_R_INTERNAL_ERROR);
5424 return 0;
5425 }
5426 return 1;
5427 }
5428
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)5429 int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
5430 int isv2format, STACK_OF(SSL_CIPHER) **sk,
5431 STACK_OF(SSL_CIPHER) **scsvs)
5432 {
5433 PACKET pkt;
5434
5435 if (!PACKET_buf_init(&pkt, bytes, len))
5436 return 0;
5437 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0);
5438 }
5439
bytes_to_cipher_list(SSL * s,PACKET * cipher_suites,STACK_OF (SSL_CIPHER)** skp,STACK_OF (SSL_CIPHER)** scsvs_out,int sslv2format,int fatal)5440 int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
5441 STACK_OF(SSL_CIPHER) **skp,
5442 STACK_OF(SSL_CIPHER) **scsvs_out,
5443 int sslv2format, int fatal)
5444 {
5445 const SSL_CIPHER *c;
5446 STACK_OF(SSL_CIPHER) *sk = NULL;
5447 STACK_OF(SSL_CIPHER) *scsvs = NULL;
5448 int n;
5449 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
5450 unsigned char cipher[SSLV2_CIPHER_LEN];
5451
5452 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5453
5454 if (PACKET_remaining(cipher_suites) == 0) {
5455 if (fatal)
5456 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_BYTES_TO_CIPHER_LIST,
5457 SSL_R_NO_CIPHERS_SPECIFIED);
5458 else
5459 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
5460 return 0;
5461 }
5462
5463 if (PACKET_remaining(cipher_suites) % n != 0) {
5464 if (fatal)
5465 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5466 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5467 else
5468 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST,
5469 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5470 return 0;
5471 }
5472
5473 sk = sk_SSL_CIPHER_new_null();
5474 scsvs = sk_SSL_CIPHER_new_null();
5475 if (sk == NULL || scsvs == NULL) {
5476 if (fatal)
5477 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5478 ERR_R_MALLOC_FAILURE);
5479 else
5480 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5481 goto err;
5482 }
5483
5484 while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
5485 /*
5486 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
5487 * first byte set to zero, while true SSLv2 ciphers have a non-zero
5488 * first byte. We don't support any true SSLv2 ciphers, so skip them.
5489 */
5490 if (sslv2format && cipher[0] != '\0')
5491 continue;
5492
5493 /* For SSLv2-compat, ignore leading 0-byte. */
5494 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
5495 if (c != NULL) {
5496 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
5497 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
5498 if (fatal)
5499 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
5500 SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5501 else
5502 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5503 goto err;
5504 }
5505 }
5506 }
5507 if (PACKET_remaining(cipher_suites) > 0) {
5508 if (fatal)
5509 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5510 SSL_R_BAD_LENGTH);
5511 else
5512 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH);
5513 goto err;
5514 }
5515
5516 if (skp != NULL)
5517 *skp = sk;
5518 else
5519 sk_SSL_CIPHER_free(sk);
5520 if (scsvs_out != NULL)
5521 *scsvs_out = scsvs;
5522 else
5523 sk_SSL_CIPHER_free(scsvs);
5524 return 1;
5525 err:
5526 sk_SSL_CIPHER_free(sk);
5527 sk_SSL_CIPHER_free(scsvs);
5528 return 0;
5529 }
5530
SSL_CTX_set_max_early_data(SSL_CTX * ctx,uint32_t max_early_data)5531 int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
5532 {
5533 ctx->max_early_data = max_early_data;
5534
5535 return 1;
5536 }
5537
SSL_CTX_get_max_early_data(const SSL_CTX * ctx)5538 uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
5539 {
5540 return ctx->max_early_data;
5541 }
5542
SSL_set_max_early_data(SSL * s,uint32_t max_early_data)5543 int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
5544 {
5545 s->max_early_data = max_early_data;
5546
5547 return 1;
5548 }
5549
SSL_get_max_early_data(const SSL * s)5550 uint32_t SSL_get_max_early_data(const SSL *s)
5551 {
5552 return s->max_early_data;
5553 }
5554
SSL_CTX_set_recv_max_early_data(SSL_CTX * ctx,uint32_t recv_max_early_data)5555 int SSL_CTX_set_recv_max_early_data(SSL_CTX *ctx, uint32_t recv_max_early_data)
5556 {
5557 ctx->recv_max_early_data = recv_max_early_data;
5558
5559 return 1;
5560 }
5561
SSL_CTX_get_recv_max_early_data(const SSL_CTX * ctx)5562 uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX *ctx)
5563 {
5564 return ctx->recv_max_early_data;
5565 }
5566
SSL_set_recv_max_early_data(SSL * s,uint32_t recv_max_early_data)5567 int SSL_set_recv_max_early_data(SSL *s, uint32_t recv_max_early_data)
5568 {
5569 s->recv_max_early_data = recv_max_early_data;
5570
5571 return 1;
5572 }
5573
SSL_get_recv_max_early_data(const SSL * s)5574 uint32_t SSL_get_recv_max_early_data(const SSL *s)
5575 {
5576 return s->recv_max_early_data;
5577 }
5578
ssl_get_max_send_fragment(const SSL * ssl)5579 __owur unsigned int ssl_get_max_send_fragment(const SSL *ssl)
5580 {
5581 /* Return any active Max Fragment Len extension */
5582 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session))
5583 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5584
5585 /* return current SSL connection setting */
5586 return ssl->max_send_fragment;
5587 }
5588
ssl_get_split_send_fragment(const SSL * ssl)5589 __owur unsigned int ssl_get_split_send_fragment(const SSL *ssl)
5590 {
5591 /* Return a value regarding an active Max Fragment Len extension */
5592 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)
5593 && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session))
5594 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5595
5596 /* else limit |split_send_fragment| to current |max_send_fragment| */
5597 if (ssl->split_send_fragment > ssl->max_send_fragment)
5598 return ssl->max_send_fragment;
5599
5600 /* return current SSL connection setting */
5601 return ssl->split_send_fragment;
5602 }
5603
SSL_stateless(SSL * s)5604 int SSL_stateless(SSL *s)
5605 {
5606 int ret;
5607
5608 /* Ensure there is no state left over from a previous invocation */
5609 if (!SSL_clear(s))
5610 return 0;
5611
5612 ERR_clear_error();
5613
5614 s->s3->flags |= TLS1_FLAGS_STATELESS;
5615 ret = SSL_accept(s);
5616 s->s3->flags &= ~TLS1_FLAGS_STATELESS;
5617
5618 if (ret > 0 && s->ext.cookieok)
5619 return 1;
5620
5621 if (s->hello_retry_request == SSL_HRR_PENDING && !ossl_statem_in_error(s))
5622 return 0;
5623
5624 return -1;
5625 }
5626
SSL_CTX_set_post_handshake_auth(SSL_CTX * ctx,int val)5627 void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val)
5628 {
5629 ctx->pha_enabled = val;
5630 }
5631
SSL_set_post_handshake_auth(SSL * ssl,int val)5632 void SSL_set_post_handshake_auth(SSL *ssl, int val)
5633 {
5634 ssl->pha_enabled = val;
5635 }
5636
SSL_verify_client_post_handshake(SSL * ssl)5637 int SSL_verify_client_post_handshake(SSL *ssl)
5638 {
5639 if (!SSL_IS_TLS13(ssl)) {
5640 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_WRONG_SSL_VERSION);
5641 return 0;
5642 }
5643 if (!ssl->server) {
5644 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_NOT_SERVER);
5645 return 0;
5646 }
5647
5648 if (!SSL_is_init_finished(ssl)) {
5649 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_STILL_IN_INIT);
5650 return 0;
5651 }
5652
5653 switch (ssl->post_handshake_auth) {
5654 case SSL_PHA_NONE:
5655 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_EXTENSION_NOT_RECEIVED);
5656 return 0;
5657 default:
5658 case SSL_PHA_EXT_SENT:
5659 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, ERR_R_INTERNAL_ERROR);
5660 return 0;
5661 case SSL_PHA_EXT_RECEIVED:
5662 break;
5663 case SSL_PHA_REQUEST_PENDING:
5664 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_PENDING);
5665 return 0;
5666 case SSL_PHA_REQUESTED:
5667 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_SENT);
5668 return 0;
5669 }
5670
5671 ssl->post_handshake_auth = SSL_PHA_REQUEST_PENDING;
5672
5673 /* checks verify_mode and algorithm_auth */
5674 if (!send_certificate_request(ssl)) {
5675 ssl->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */
5676 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_INVALID_CONFIG);
5677 return 0;
5678 }
5679
5680 ossl_statem_set_in_init(ssl, 1);
5681 return 1;
5682 }
5683
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)5684 int SSL_CTX_set_session_ticket_cb(SSL_CTX *ctx,
5685 SSL_CTX_generate_session_ticket_fn gen_cb,
5686 SSL_CTX_decrypt_session_ticket_fn dec_cb,
5687 void *arg)
5688 {
5689 ctx->generate_ticket_cb = gen_cb;
5690 ctx->decrypt_ticket_cb = dec_cb;
5691 ctx->ticket_cb_data = arg;
5692 return 1;
5693 }
5694
SSL_CTX_set_allow_early_data_cb(SSL_CTX * ctx,SSL_allow_early_data_cb_fn cb,void * arg)5695 void SSL_CTX_set_allow_early_data_cb(SSL_CTX *ctx,
5696 SSL_allow_early_data_cb_fn cb,
5697 void *arg)
5698 {
5699 ctx->allow_early_data_cb = cb;
5700 ctx->allow_early_data_cb_data = arg;
5701 }
5702
SSL_set_allow_early_data_cb(SSL * s,SSL_allow_early_data_cb_fn cb,void * arg)5703 void SSL_set_allow_early_data_cb(SSL *s,
5704 SSL_allow_early_data_cb_fn cb,
5705 void *arg)
5706 {
5707 s->allow_early_data_cb = cb;
5708 s->allow_early_data_cb_data = arg;
5709 }
5710