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