1 /*
2 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 * Copyright 2005 Nokia. All rights reserved.
5 *
6 * Licensed under the OpenSSL license (the "License"). You may not use
7 * this file except in compliance with the License. You can obtain a copy
8 * in the file LICENSE in the source distribution or at
9 * https://www.openssl.org/source/license.html
10 */
11
12 #include <stdio.h>
13 #include "ssl_locl.h"
14 #include <openssl/objects.h>
15 #include <openssl/x509v3.h>
16 #include <openssl/rand.h>
17 #include <openssl/rand_drbg.h>
18 #include <openssl/ocsp.h>
19 #include <openssl/dh.h>
20 #include <openssl/engine.h>
21 #include <openssl/async.h>
22 #include <openssl/ct.h>
23 #include "internal/cryptlib.h"
24 #include "internal/refcount.h"
25
26 const char SSL_version_str[] = OPENSSL_VERSION_TEXT;
27
ssl_undefined_function_1(SSL * ssl,SSL3_RECORD * r,size_t s,int t)28 static int ssl_undefined_function_1(SSL *ssl, SSL3_RECORD *r, size_t s, int t)
29 {
30 (void)r;
31 (void)s;
32 (void)t;
33 return ssl_undefined_function(ssl);
34 }
35
ssl_undefined_function_2(SSL * ssl,SSL3_RECORD * r,unsigned char * s,int t)36 static int ssl_undefined_function_2(SSL *ssl, SSL3_RECORD *r, unsigned char *s,
37 int t)
38 {
39 (void)r;
40 (void)s;
41 (void)t;
42 return ssl_undefined_function(ssl);
43 }
44
ssl_undefined_function_3(SSL * ssl,unsigned char * r,unsigned char * s,size_t t,size_t * u)45 static int ssl_undefined_function_3(SSL *ssl, unsigned char *r,
46 unsigned char *s, size_t t, size_t *u)
47 {
48 (void)r;
49 (void)s;
50 (void)t;
51 (void)u;
52 return ssl_undefined_function(ssl);
53 }
54
ssl_undefined_function_4(SSL * ssl,int r)55 static int ssl_undefined_function_4(SSL *ssl, int r)
56 {
57 (void)r;
58 return ssl_undefined_function(ssl);
59 }
60
ssl_undefined_function_5(SSL * ssl,const char * r,size_t s,unsigned char * t)61 static size_t ssl_undefined_function_5(SSL *ssl, const char *r, size_t s,
62 unsigned char *t)
63 {
64 (void)r;
65 (void)s;
66 (void)t;
67 return ssl_undefined_function(ssl);
68 }
69
ssl_undefined_function_6(int r)70 static int ssl_undefined_function_6(int r)
71 {
72 (void)r;
73 return ssl_undefined_function(NULL);
74 }
75
ssl_undefined_function_7(SSL * ssl,unsigned char * r,size_t s,const char * t,size_t u,const unsigned char * v,size_t w,int x)76 static int ssl_undefined_function_7(SSL *ssl, unsigned char *r, size_t s,
77 const char *t, size_t u,
78 const unsigned char *v, size_t w, int x)
79 {
80 (void)r;
81 (void)s;
82 (void)t;
83 (void)u;
84 (void)v;
85 (void)w;
86 (void)x;
87 return ssl_undefined_function(ssl);
88 }
89
90 SSL3_ENC_METHOD ssl3_undef_enc_method = {
91 ssl_undefined_function_1,
92 ssl_undefined_function_2,
93 ssl_undefined_function,
94 ssl_undefined_function_3,
95 ssl_undefined_function_4,
96 ssl_undefined_function_5,
97 NULL, /* client_finished_label */
98 0, /* client_finished_label_len */
99 NULL, /* server_finished_label */
100 0, /* server_finished_label_len */
101 ssl_undefined_function_6,
102 ssl_undefined_function_7,
103 };
104
105 struct ssl_async_args {
106 SSL *s;
107 void *buf;
108 size_t num;
109 enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
110 union {
111 int (*func_read) (SSL *, void *, size_t, size_t *);
112 int (*func_write) (SSL *, const void *, size_t, size_t *);
113 int (*func_other) (SSL *);
114 } f;
115 };
116
117 static const struct {
118 uint8_t mtype;
119 uint8_t ord;
120 int nid;
121 } dane_mds[] = {
122 {
123 DANETLS_MATCHING_FULL, 0, NID_undef
124 },
125 {
126 DANETLS_MATCHING_2256, 1, NID_sha256
127 },
128 {
129 DANETLS_MATCHING_2512, 2, NID_sha512
130 },
131 };
132
dane_ctx_enable(struct dane_ctx_st * dctx)133 static int dane_ctx_enable(struct dane_ctx_st *dctx)
134 {
135 const EVP_MD **mdevp;
136 uint8_t *mdord;
137 uint8_t mdmax = DANETLS_MATCHING_LAST;
138 int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */
139 size_t i;
140
141 if (dctx->mdevp != NULL)
142 return 1;
143
144 mdevp = OPENSSL_zalloc(n * sizeof(*mdevp));
145 mdord = OPENSSL_zalloc(n * sizeof(*mdord));
146
147 if (mdord == NULL || mdevp == NULL) {
148 OPENSSL_free(mdord);
149 OPENSSL_free(mdevp);
150 SSLerr(SSL_F_DANE_CTX_ENABLE, ERR_R_MALLOC_FAILURE);
151 return 0;
152 }
153
154 /* Install default entries */
155 for (i = 0; i < OSSL_NELEM(dane_mds); ++i) {
156 const EVP_MD *md;
157
158 if (dane_mds[i].nid == NID_undef ||
159 (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL)
160 continue;
161 mdevp[dane_mds[i].mtype] = md;
162 mdord[dane_mds[i].mtype] = dane_mds[i].ord;
163 }
164
165 dctx->mdevp = mdevp;
166 dctx->mdord = mdord;
167 dctx->mdmax = mdmax;
168
169 return 1;
170 }
171
dane_ctx_final(struct dane_ctx_st * dctx)172 static void dane_ctx_final(struct dane_ctx_st *dctx)
173 {
174 OPENSSL_free(dctx->mdevp);
175 dctx->mdevp = NULL;
176
177 OPENSSL_free(dctx->mdord);
178 dctx->mdord = NULL;
179 dctx->mdmax = 0;
180 }
181
tlsa_free(danetls_record * t)182 static void tlsa_free(danetls_record *t)
183 {
184 if (t == NULL)
185 return;
186 OPENSSL_free(t->data);
187 EVP_PKEY_free(t->spki);
188 OPENSSL_free(t);
189 }
190
dane_final(SSL_DANE * dane)191 static void dane_final(SSL_DANE *dane)
192 {
193 sk_danetls_record_pop_free(dane->trecs, tlsa_free);
194 dane->trecs = NULL;
195
196 sk_X509_pop_free(dane->certs, X509_free);
197 dane->certs = NULL;
198
199 X509_free(dane->mcert);
200 dane->mcert = NULL;
201 dane->mtlsa = NULL;
202 dane->mdpth = -1;
203 dane->pdpth = -1;
204 }
205
206 /*
207 * dane_copy - Copy dane configuration, sans verification state.
208 */
ssl_dane_dup(SSL * to,SSL * from)209 static int ssl_dane_dup(SSL *to, SSL *from)
210 {
211 int num;
212 int i;
213
214 if (!DANETLS_ENABLED(&from->dane))
215 return 1;
216
217 num = sk_danetls_record_num(from->dane.trecs);
218 dane_final(&to->dane);
219 to->dane.flags = from->dane.flags;
220 to->dane.dctx = &to->ctx->dane;
221 to->dane.trecs = sk_danetls_record_new_reserve(NULL, num);
222
223 if (to->dane.trecs == NULL) {
224 SSLerr(SSL_F_SSL_DANE_DUP, ERR_R_MALLOC_FAILURE);
225 return 0;
226 }
227
228 for (i = 0; i < num; ++i) {
229 danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
230
231 if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype,
232 t->data, t->dlen) <= 0)
233 return 0;
234 }
235 return 1;
236 }
237
dane_mtype_set(struct dane_ctx_st * dctx,const EVP_MD * md,uint8_t mtype,uint8_t ord)238 static int dane_mtype_set(struct dane_ctx_st *dctx,
239 const EVP_MD *md, uint8_t mtype, uint8_t ord)
240 {
241 int i;
242
243 if (mtype == DANETLS_MATCHING_FULL && md != NULL) {
244 SSLerr(SSL_F_DANE_MTYPE_SET, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL);
245 return 0;
246 }
247
248 if (mtype > dctx->mdmax) {
249 const EVP_MD **mdevp;
250 uint8_t *mdord;
251 int n = ((int)mtype) + 1;
252
253 mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp));
254 if (mdevp == NULL) {
255 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
256 return -1;
257 }
258 dctx->mdevp = mdevp;
259
260 mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
261 if (mdord == NULL) {
262 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
263 return -1;
264 }
265 dctx->mdord = mdord;
266
267 /* Zero-fill any gaps */
268 for (i = dctx->mdmax + 1; i < mtype; ++i) {
269 mdevp[i] = NULL;
270 mdord[i] = 0;
271 }
272
273 dctx->mdmax = mtype;
274 }
275
276 dctx->mdevp[mtype] = md;
277 /* Coerce ordinal of disabled matching types to 0 */
278 dctx->mdord[mtype] = (md == NULL) ? 0 : ord;
279
280 return 1;
281 }
282
tlsa_md_get(SSL_DANE * dane,uint8_t mtype)283 static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype)
284 {
285 if (mtype > dane->dctx->mdmax)
286 return NULL;
287 return dane->dctx->mdevp[mtype];
288 }
289
dane_tlsa_add(SSL_DANE * dane,uint8_t usage,uint8_t selector,uint8_t mtype,unsigned const char * data,size_t dlen)290 static int dane_tlsa_add(SSL_DANE *dane,
291 uint8_t usage,
292 uint8_t selector,
293 uint8_t mtype, unsigned const char *data, size_t dlen)
294 {
295 danetls_record *t;
296 const EVP_MD *md = NULL;
297 int ilen = (int)dlen;
298 int i;
299 int num;
300
301 if (dane->trecs == NULL) {
302 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_NOT_ENABLED);
303 return -1;
304 }
305
306 if (ilen < 0 || dlen != (size_t)ilen) {
307 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
308 return 0;
309 }
310
311 if (usage > DANETLS_USAGE_LAST) {
312 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
313 return 0;
314 }
315
316 if (selector > DANETLS_SELECTOR_LAST) {
317 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_SELECTOR);
318 return 0;
319 }
320
321 if (mtype != DANETLS_MATCHING_FULL) {
322 md = tlsa_md_get(dane, mtype);
323 if (md == NULL) {
324 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
325 return 0;
326 }
327 }
328
329 if (md != NULL && dlen != (size_t)EVP_MD_size(md)) {
330 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
331 return 0;
332 }
333 if (!data) {
334 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_NULL_DATA);
335 return 0;
336 }
337
338 if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) {
339 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
340 return -1;
341 }
342
343 t->usage = usage;
344 t->selector = selector;
345 t->mtype = mtype;
346 t->data = OPENSSL_malloc(dlen);
347 if (t->data == NULL) {
348 tlsa_free(t);
349 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
350 return -1;
351 }
352 memcpy(t->data, data, dlen);
353 t->dlen = dlen;
354
355 /* Validate and cache full certificate or public key */
356 if (mtype == DANETLS_MATCHING_FULL) {
357 const unsigned char *p = data;
358 X509 *cert = NULL;
359 EVP_PKEY *pkey = NULL;
360
361 switch (selector) {
362 case DANETLS_SELECTOR_CERT:
363 if (!d2i_X509(&cert, &p, ilen) || p < data ||
364 dlen != (size_t)(p - data)) {
365 tlsa_free(t);
366 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
367 return 0;
368 }
369 if (X509_get0_pubkey(cert) == NULL) {
370 tlsa_free(t);
371 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
372 return 0;
373 }
374
375 if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) {
376 X509_free(cert);
377 break;
378 }
379
380 /*
381 * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA
382 * records that contain full certificates of trust-anchors that are
383 * not present in the wire chain. For usage PKIX-TA(0), we augment
384 * the chain with untrusted Full(0) certificates from DNS, in case
385 * they are missing from the chain.
386 */
387 if ((dane->certs == NULL &&
388 (dane->certs = sk_X509_new_null()) == NULL) ||
389 !sk_X509_push(dane->certs, cert)) {
390 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
391 X509_free(cert);
392 tlsa_free(t);
393 return -1;
394 }
395 break;
396
397 case DANETLS_SELECTOR_SPKI:
398 if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
399 dlen != (size_t)(p - data)) {
400 tlsa_free(t);
401 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
402 return 0;
403 }
404
405 /*
406 * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA
407 * records that contain full bare keys of trust-anchors that are
408 * not present in the wire chain.
409 */
410 if (usage == DANETLS_USAGE_DANE_TA)
411 t->spki = pkey;
412 else
413 EVP_PKEY_free(pkey);
414 break;
415 }
416 }
417
418 /*-
419 * Find the right insertion point for the new record.
420 *
421 * See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that
422 * they can be processed first, as they require no chain building, and no
423 * expiration or hostname checks. Because DANE-EE(3) is numerically
424 * largest, this is accomplished via descending sort by "usage".
425 *
426 * We also sort in descending order by matching ordinal to simplify
427 * the implementation of digest agility in the verification code.
428 *
429 * The choice of order for the selector is not significant, so we
430 * use the same descending order for consistency.
431 */
432 num = sk_danetls_record_num(dane->trecs);
433 for (i = 0; i < num; ++i) {
434 danetls_record *rec = sk_danetls_record_value(dane->trecs, i);
435
436 if (rec->usage > usage)
437 continue;
438 if (rec->usage < usage)
439 break;
440 if (rec->selector > selector)
441 continue;
442 if (rec->selector < selector)
443 break;
444 if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype])
445 continue;
446 break;
447 }
448
449 if (!sk_danetls_record_insert(dane->trecs, t, i)) {
450 tlsa_free(t);
451 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
452 return -1;
453 }
454 dane->umask |= DANETLS_USAGE_BIT(usage);
455
456 return 1;
457 }
458
459 /*
460 * Return 0 if there is only one version configured and it was disabled
461 * at configure time. Return 1 otherwise.
462 */
ssl_check_allowed_versions(int min_version,int max_version)463 static int ssl_check_allowed_versions(int min_version, int max_version)
464 {
465 int minisdtls = 0, maxisdtls = 0;
466
467 /* Figure out if we're doing DTLS versions or TLS versions */
468 if (min_version == DTLS1_BAD_VER
469 || min_version >> 8 == DTLS1_VERSION_MAJOR)
470 minisdtls = 1;
471 if (max_version == DTLS1_BAD_VER
472 || max_version >> 8 == DTLS1_VERSION_MAJOR)
473 maxisdtls = 1;
474 /* A wildcard version of 0 could be DTLS or TLS. */
475 if ((minisdtls && !maxisdtls && max_version != 0)
476 || (maxisdtls && !minisdtls && min_version != 0)) {
477 /* Mixing DTLS and TLS versions will lead to sadness; deny it. */
478 return 0;
479 }
480
481 if (minisdtls || maxisdtls) {
482 /* Do DTLS version checks. */
483 if (min_version == 0)
484 /* Ignore DTLS1_BAD_VER */
485 min_version = DTLS1_VERSION;
486 if (max_version == 0)
487 max_version = DTLS1_2_VERSION;
488 #ifdef OPENSSL_NO_DTLS1_2
489 if (max_version == DTLS1_2_VERSION)
490 max_version = DTLS1_VERSION;
491 #endif
492 #ifdef OPENSSL_NO_DTLS1
493 if (min_version == DTLS1_VERSION)
494 min_version = DTLS1_2_VERSION;
495 #endif
496 /* Done massaging versions; do the check. */
497 if (0
498 #ifdef OPENSSL_NO_DTLS1
499 || (DTLS_VERSION_GE(min_version, DTLS1_VERSION)
500 && DTLS_VERSION_GE(DTLS1_VERSION, max_version))
501 #endif
502 #ifdef OPENSSL_NO_DTLS1_2
503 || (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION)
504 && DTLS_VERSION_GE(DTLS1_2_VERSION, max_version))
505 #endif
506 )
507 return 0;
508 } else {
509 /* Regular TLS version checks. */
510 if (min_version == 0)
511 min_version = SSL3_VERSION;
512 if (max_version == 0)
513 max_version = TLS1_3_VERSION;
514 #ifdef OPENSSL_NO_TLS1_3
515 if (max_version == TLS1_3_VERSION)
516 max_version = TLS1_2_VERSION;
517 #endif
518 #ifdef OPENSSL_NO_TLS1_2
519 if (max_version == TLS1_2_VERSION)
520 max_version = TLS1_1_VERSION;
521 #endif
522 #ifdef OPENSSL_NO_TLS1_1
523 if (max_version == TLS1_1_VERSION)
524 max_version = TLS1_VERSION;
525 #endif
526 #ifdef OPENSSL_NO_TLS1
527 if (max_version == TLS1_VERSION)
528 max_version = SSL3_VERSION;
529 #endif
530 #ifdef OPENSSL_NO_SSL3
531 if (min_version == SSL3_VERSION)
532 min_version = TLS1_VERSION;
533 #endif
534 #ifdef OPENSSL_NO_TLS1
535 if (min_version == TLS1_VERSION)
536 min_version = TLS1_1_VERSION;
537 #endif
538 #ifdef OPENSSL_NO_TLS1_1
539 if (min_version == TLS1_1_VERSION)
540 min_version = TLS1_2_VERSION;
541 #endif
542 #ifdef OPENSSL_NO_TLS1_2
543 if (min_version == TLS1_2_VERSION)
544 min_version = TLS1_3_VERSION;
545 #endif
546 /* Done massaging versions; do the check. */
547 if (0
548 #ifdef OPENSSL_NO_SSL3
549 || (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version)
550 #endif
551 #ifdef OPENSSL_NO_TLS1
552 || (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version)
553 #endif
554 #ifdef OPENSSL_NO_TLS1_1
555 || (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version)
556 #endif
557 #ifdef OPENSSL_NO_TLS1_2
558 || (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version)
559 #endif
560 #ifdef OPENSSL_NO_TLS1_3
561 || (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version)
562 #endif
563 )
564 return 0;
565 }
566 return 1;
567 }
568
clear_ciphers(SSL * s)569 static void clear_ciphers(SSL *s)
570 {
571 /* clear the current cipher */
572 ssl_clear_cipher_ctx(s);
573 ssl_clear_hash_ctx(&s->read_hash);
574 ssl_clear_hash_ctx(&s->write_hash);
575 }
576
SSL_clear(SSL * s)577 int SSL_clear(SSL *s)
578 {
579 if (s->method == NULL) {
580 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED);
581 return 0;
582 }
583
584 if (ssl_clear_bad_session(s)) {
585 SSL_SESSION_free(s->session);
586 s->session = NULL;
587 }
588 SSL_SESSION_free(s->psksession);
589 s->psksession = NULL;
590 OPENSSL_free(s->psksession_id);
591 s->psksession_id = NULL;
592 s->psksession_id_len = 0;
593 s->hello_retry_request = 0;
594 s->sent_tickets = 0;
595
596 s->error = 0;
597 s->hit = 0;
598 s->shutdown = 0;
599
600 if (s->renegotiate) {
601 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
602 return 0;
603 }
604
605 ossl_statem_clear(s);
606
607 s->version = s->method->version;
608 s->client_version = s->version;
609 s->rwstate = SSL_NOTHING;
610
611 BUF_MEM_free(s->init_buf);
612 s->init_buf = NULL;
613 clear_ciphers(s);
614 s->first_packet = 0;
615
616 s->key_update = SSL_KEY_UPDATE_NONE;
617
618 EVP_MD_CTX_free(s->pha_dgst);
619 s->pha_dgst = NULL;
620
621 /* Reset DANE verification result state */
622 s->dane.mdpth = -1;
623 s->dane.pdpth = -1;
624 X509_free(s->dane.mcert);
625 s->dane.mcert = NULL;
626 s->dane.mtlsa = NULL;
627
628 /* Clear the verification result peername */
629 X509_VERIFY_PARAM_move_peername(s->param, NULL);
630
631 /* 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 goto err;
784 s->ext.ecpointformats_len =
785 ctx->ext.ecpointformats_len;
786 }
787 if (ctx->ext.supportedgroups) {
788 s->ext.supportedgroups =
789 OPENSSL_memdup(ctx->ext.supportedgroups,
790 ctx->ext.supportedgroups_len
791 * sizeof(*ctx->ext.supportedgroups));
792 if (!s->ext.supportedgroups)
793 goto err;
794 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
795 }
796 #endif
797 #ifndef OPENSSL_NO_NEXTPROTONEG
798 s->ext.npn = NULL;
799 #endif
800
801 if (s->ctx->ext.alpn) {
802 s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
803 if (s->ext.alpn == NULL)
804 goto err;
805 memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
806 s->ext.alpn_len = s->ctx->ext.alpn_len;
807 }
808
809 s->verified_chain = NULL;
810 s->verify_result = X509_V_OK;
811
812 s->default_passwd_callback = ctx->default_passwd_callback;
813 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
814
815 s->method = ctx->method;
816
817 s->key_update = SSL_KEY_UPDATE_NONE;
818
819 s->allow_early_data_cb = ctx->allow_early_data_cb;
820 s->allow_early_data_cb_data = ctx->allow_early_data_cb_data;
821
822 if (!s->method->ssl_new(s))
823 goto err;
824
825 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
826
827 if (!SSL_clear(s))
828 goto err;
829
830 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
831 goto err;
832
833 #ifndef OPENSSL_NO_PSK
834 s->psk_client_callback = ctx->psk_client_callback;
835 s->psk_server_callback = ctx->psk_server_callback;
836 #endif
837 s->psk_find_session_cb = ctx->psk_find_session_cb;
838 s->psk_use_session_cb = ctx->psk_use_session_cb;
839
840 s->job = NULL;
841
842 #ifndef OPENSSL_NO_CT
843 if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
844 ctx->ct_validation_callback_arg))
845 goto err;
846 #endif
847
848 return s;
849 err:
850 SSL_free(s);
851 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
852 return NULL;
853 }
854
SSL_is_dtls(const SSL * s)855 int SSL_is_dtls(const SSL *s)
856 {
857 return SSL_IS_DTLS(s) ? 1 : 0;
858 }
859
SSL_up_ref(SSL * s)860 int SSL_up_ref(SSL *s)
861 {
862 int i;
863
864 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
865 return 0;
866
867 REF_PRINT_COUNT("SSL", s);
868 REF_ASSERT_ISNT(i < 2);
869 return ((i > 1) ? 1 : 0);
870 }
871
SSL_CTX_set_session_id_context(SSL_CTX * ctx,const unsigned char * sid_ctx,unsigned int sid_ctx_len)872 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
873 unsigned int sid_ctx_len)
874 {
875 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
876 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
877 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
878 return 0;
879 }
880 ctx->sid_ctx_length = sid_ctx_len;
881 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
882
883 return 1;
884 }
885
SSL_set_session_id_context(SSL * ssl,const unsigned char * sid_ctx,unsigned int sid_ctx_len)886 int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
887 unsigned int sid_ctx_len)
888 {
889 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
890 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
891 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
892 return 0;
893 }
894 ssl->sid_ctx_length = sid_ctx_len;
895 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
896
897 return 1;
898 }
899
SSL_CTX_set_generate_session_id(SSL_CTX * ctx,GEN_SESSION_CB cb)900 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
901 {
902 CRYPTO_THREAD_write_lock(ctx->lock);
903 ctx->generate_session_id = cb;
904 CRYPTO_THREAD_unlock(ctx->lock);
905 return 1;
906 }
907
SSL_set_generate_session_id(SSL * ssl,GEN_SESSION_CB cb)908 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
909 {
910 CRYPTO_THREAD_write_lock(ssl->lock);
911 ssl->generate_session_id = cb;
912 CRYPTO_THREAD_unlock(ssl->lock);
913 return 1;
914 }
915
SSL_has_matching_session_id(const SSL * ssl,const unsigned char * id,unsigned int id_len)916 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
917 unsigned int id_len)
918 {
919 /*
920 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
921 * we can "construct" a session to give us the desired check - i.e. to
922 * find if there's a session in the hash table that would conflict with
923 * any new session built out of this id/id_len and the ssl_version in use
924 * by this SSL.
925 */
926 SSL_SESSION r, *p;
927
928 if (id_len > sizeof(r.session_id))
929 return 0;
930
931 r.ssl_version = ssl->version;
932 r.session_id_length = id_len;
933 memcpy(r.session_id, id, id_len);
934
935 CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
936 p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
937 CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
938 return (p != NULL);
939 }
940
SSL_CTX_set_purpose(SSL_CTX * s,int purpose)941 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
942 {
943 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
944 }
945
SSL_set_purpose(SSL * s,int purpose)946 int SSL_set_purpose(SSL *s, int purpose)
947 {
948 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
949 }
950
SSL_CTX_set_trust(SSL_CTX * s,int trust)951 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
952 {
953 return X509_VERIFY_PARAM_set_trust(s->param, trust);
954 }
955
SSL_set_trust(SSL * s,int trust)956 int SSL_set_trust(SSL *s, int trust)
957 {
958 return X509_VERIFY_PARAM_set_trust(s->param, trust);
959 }
960
SSL_set1_host(SSL * s,const char * hostname)961 int SSL_set1_host(SSL *s, const char *hostname)
962 {
963 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
964 }
965
SSL_add1_host(SSL * s,const char * hostname)966 int SSL_add1_host(SSL *s, const char *hostname)
967 {
968 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
969 }
970
SSL_set_hostflags(SSL * s,unsigned int flags)971 void SSL_set_hostflags(SSL *s, unsigned int flags)
972 {
973 X509_VERIFY_PARAM_set_hostflags(s->param, flags);
974 }
975
SSL_get0_peername(SSL * s)976 const char *SSL_get0_peername(SSL *s)
977 {
978 return X509_VERIFY_PARAM_get0_peername(s->param);
979 }
980
SSL_CTX_dane_enable(SSL_CTX * ctx)981 int SSL_CTX_dane_enable(SSL_CTX *ctx)
982 {
983 return dane_ctx_enable(&ctx->dane);
984 }
985
SSL_CTX_dane_set_flags(SSL_CTX * ctx,unsigned long flags)986 unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
987 {
988 unsigned long orig = ctx->dane.flags;
989
990 ctx->dane.flags |= flags;
991 return orig;
992 }
993
SSL_CTX_dane_clear_flags(SSL_CTX * ctx,unsigned long flags)994 unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
995 {
996 unsigned long orig = ctx->dane.flags;
997
998 ctx->dane.flags &= ~flags;
999 return orig;
1000 }
1001
SSL_dane_enable(SSL * s,const char * basedomain)1002 int SSL_dane_enable(SSL *s, const char *basedomain)
1003 {
1004 SSL_DANE *dane = &s->dane;
1005
1006 if (s->ctx->dane.mdmax == 0) {
1007 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED);
1008 return 0;
1009 }
1010 if (dane->trecs != NULL) {
1011 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED);
1012 return 0;
1013 }
1014
1015 /*
1016 * Default SNI name. This rejects empty names, while set1_host below
1017 * accepts them and disables host name checks. To avoid side-effects with
1018 * invalid input, set the SNI name first.
1019 */
1020 if (s->ext.hostname == NULL) {
1021 if (!SSL_set_tlsext_host_name(s, basedomain)) {
1022 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1023 return -1;
1024 }
1025 }
1026
1027 /* Primary RFC6125 reference identifier */
1028 if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
1029 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1030 return -1;
1031 }
1032
1033 dane->mdpth = -1;
1034 dane->pdpth = -1;
1035 dane->dctx = &s->ctx->dane;
1036 dane->trecs = sk_danetls_record_new_null();
1037
1038 if (dane->trecs == NULL) {
1039 SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE);
1040 return -1;
1041 }
1042 return 1;
1043 }
1044
SSL_dane_set_flags(SSL * ssl,unsigned long flags)1045 unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
1046 {
1047 unsigned long orig = ssl->dane.flags;
1048
1049 ssl->dane.flags |= flags;
1050 return orig;
1051 }
1052
SSL_dane_clear_flags(SSL * ssl,unsigned long flags)1053 unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
1054 {
1055 unsigned long orig = ssl->dane.flags;
1056
1057 ssl->dane.flags &= ~flags;
1058 return orig;
1059 }
1060
SSL_get0_dane_authority(SSL * s,X509 ** mcert,EVP_PKEY ** mspki)1061 int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
1062 {
1063 SSL_DANE *dane = &s->dane;
1064
1065 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1066 return -1;
1067 if (dane->mtlsa) {
1068 if (mcert)
1069 *mcert = dane->mcert;
1070 if (mspki)
1071 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
1072 }
1073 return dane->mdpth;
1074 }
1075
SSL_get0_dane_tlsa(SSL * s,uint8_t * usage,uint8_t * selector,uint8_t * mtype,unsigned const char ** data,size_t * dlen)1076 int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
1077 uint8_t *mtype, unsigned const char **data, size_t *dlen)
1078 {
1079 SSL_DANE *dane = &s->dane;
1080
1081 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1082 return -1;
1083 if (dane->mtlsa) {
1084 if (usage)
1085 *usage = dane->mtlsa->usage;
1086 if (selector)
1087 *selector = dane->mtlsa->selector;
1088 if (mtype)
1089 *mtype = dane->mtlsa->mtype;
1090 if (data)
1091 *data = dane->mtlsa->data;
1092 if (dlen)
1093 *dlen = dane->mtlsa->dlen;
1094 }
1095 return dane->mdpth;
1096 }
1097
SSL_get0_dane(SSL * s)1098 SSL_DANE *SSL_get0_dane(SSL *s)
1099 {
1100 return &s->dane;
1101 }
1102
SSL_dane_tlsa_add(SSL * s,uint8_t usage,uint8_t selector,uint8_t mtype,unsigned const char * data,size_t dlen)1103 int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
1104 uint8_t mtype, unsigned const char *data, size_t dlen)
1105 {
1106 return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen);
1107 }
1108
SSL_CTX_dane_mtype_set(SSL_CTX * ctx,const EVP_MD * md,uint8_t mtype,uint8_t ord)1109 int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
1110 uint8_t ord)
1111 {
1112 return dane_mtype_set(&ctx->dane, md, mtype, ord);
1113 }
1114
SSL_CTX_set1_param(SSL_CTX * ctx,X509_VERIFY_PARAM * vpm)1115 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
1116 {
1117 return X509_VERIFY_PARAM_set1(ctx->param, vpm);
1118 }
1119
SSL_set1_param(SSL * ssl,X509_VERIFY_PARAM * vpm)1120 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
1121 {
1122 return X509_VERIFY_PARAM_set1(ssl->param, vpm);
1123 }
1124
SSL_CTX_get0_param(SSL_CTX * ctx)1125 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
1126 {
1127 return ctx->param;
1128 }
1129
SSL_get0_param(SSL * ssl)1130 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
1131 {
1132 return ssl->param;
1133 }
1134
SSL_certs_clear(SSL * s)1135 void SSL_certs_clear(SSL *s)
1136 {
1137 ssl_cert_clear_certs(s->cert);
1138 }
1139
SSL_free(SSL * s)1140 void SSL_free(SSL *s)
1141 {
1142 int i;
1143
1144 if (s == NULL)
1145 return;
1146 CRYPTO_DOWN_REF(&s->references, &i, s->lock);
1147 REF_PRINT_COUNT("SSL", s);
1148 if (i > 0)
1149 return;
1150 REF_ASSERT_ISNT(i < 0);
1151
1152 X509_VERIFY_PARAM_free(s->param);
1153 dane_final(&s->dane);
1154 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
1155
1156 /* Ignore return value */
1157 ssl_free_wbio_buffer(s);
1158
1159 BIO_free_all(s->wbio);
1160 BIO_free_all(s->rbio);
1161
1162 BUF_MEM_free(s->init_buf);
1163
1164 /* add extra stuff */
1165 sk_SSL_CIPHER_free(s->cipher_list);
1166 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1167 sk_SSL_CIPHER_free(s->tls13_ciphersuites);
1168 sk_SSL_CIPHER_free(s->peer_ciphers);
1169
1170 /* Make the next call work :-) */
1171 if (s->session != NULL) {
1172 ssl_clear_bad_session(s);
1173 SSL_SESSION_free(s->session);
1174 }
1175 SSL_SESSION_free(s->psksession);
1176 OPENSSL_free(s->psksession_id);
1177
1178 clear_ciphers(s);
1179
1180 ssl_cert_free(s->cert);
1181 OPENSSL_free(s->shared_sigalgs);
1182 /* Free up if allocated */
1183
1184 OPENSSL_free(s->ext.hostname);
1185 SSL_CTX_free(s->session_ctx);
1186 #ifndef OPENSSL_NO_EC
1187 OPENSSL_free(s->ext.ecpointformats);
1188 OPENSSL_free(s->ext.peer_ecpointformats);
1189 OPENSSL_free(s->ext.supportedgroups);
1190 OPENSSL_free(s->ext.peer_supportedgroups);
1191 #endif /* OPENSSL_NO_EC */
1192 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
1193 #ifndef OPENSSL_NO_OCSP
1194 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
1195 #endif
1196 #ifndef OPENSSL_NO_CT
1197 SCT_LIST_free(s->scts);
1198 OPENSSL_free(s->ext.scts);
1199 #endif
1200 OPENSSL_free(s->ext.ocsp.resp);
1201 OPENSSL_free(s->ext.alpn);
1202 OPENSSL_free(s->ext.tls13_cookie);
1203 OPENSSL_free(s->clienthello);
1204 OPENSSL_free(s->pha_context);
1205 EVP_MD_CTX_free(s->pha_dgst);
1206
1207 sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free);
1208 sk_X509_NAME_pop_free(s->client_ca_names, X509_NAME_free);
1209
1210 sk_X509_pop_free(s->verified_chain, X509_free);
1211
1212 if (s->method != NULL)
1213 s->method->ssl_free(s);
1214
1215 RECORD_LAYER_release(&s->rlayer);
1216
1217 SSL_CTX_free(s->ctx);
1218
1219 ASYNC_WAIT_CTX_free(s->waitctx);
1220
1221 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1222 OPENSSL_free(s->ext.npn);
1223 #endif
1224
1225 #ifndef OPENSSL_NO_SRTP
1226 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
1227 #endif
1228
1229 CRYPTO_THREAD_lock_free(s->lock);
1230
1231 OPENSSL_free(s);
1232 }
1233
SSL_set0_rbio(SSL * s,BIO * rbio)1234 void SSL_set0_rbio(SSL *s, BIO *rbio)
1235 {
1236 BIO_free_all(s->rbio);
1237 s->rbio = rbio;
1238 }
1239
SSL_set0_wbio(SSL * s,BIO * wbio)1240 void SSL_set0_wbio(SSL *s, BIO *wbio)
1241 {
1242 /*
1243 * If the output buffering BIO is still in place, remove it
1244 */
1245 if (s->bbio != NULL)
1246 s->wbio = BIO_pop(s->wbio);
1247
1248 BIO_free_all(s->wbio);
1249 s->wbio = wbio;
1250
1251 /* Re-attach |bbio| to the new |wbio|. */
1252 if (s->bbio != NULL)
1253 s->wbio = BIO_push(s->bbio, s->wbio);
1254 }
1255
SSL_set_bio(SSL * s,BIO * rbio,BIO * wbio)1256 void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
1257 {
1258 /*
1259 * For historical reasons, this function has many different cases in
1260 * ownership handling.
1261 */
1262
1263 /* If nothing has changed, do nothing */
1264 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
1265 return;
1266
1267 /*
1268 * If the two arguments are equal then one fewer reference is granted by the
1269 * caller than we want to take
1270 */
1271 if (rbio != NULL && rbio == wbio)
1272 BIO_up_ref(rbio);
1273
1274 /*
1275 * If only the wbio is changed only adopt one reference.
1276 */
1277 if (rbio == SSL_get_rbio(s)) {
1278 SSL_set0_wbio(s, wbio);
1279 return;
1280 }
1281 /*
1282 * There is an asymmetry here for historical reasons. If only the rbio is
1283 * changed AND the rbio and wbio were originally different, then we only
1284 * adopt one reference.
1285 */
1286 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
1287 SSL_set0_rbio(s, rbio);
1288 return;
1289 }
1290
1291 /* Otherwise, adopt both references. */
1292 SSL_set0_rbio(s, rbio);
1293 SSL_set0_wbio(s, wbio);
1294 }
1295
SSL_get_rbio(const SSL * s)1296 BIO *SSL_get_rbio(const SSL *s)
1297 {
1298 return s->rbio;
1299 }
1300
SSL_get_wbio(const SSL * s)1301 BIO *SSL_get_wbio(const SSL *s)
1302 {
1303 if (s->bbio != NULL) {
1304 /*
1305 * If |bbio| is active, the true caller-configured BIO is its
1306 * |next_bio|.
1307 */
1308 return BIO_next(s->bbio);
1309 }
1310 return s->wbio;
1311 }
1312
SSL_get_fd(const SSL * s)1313 int SSL_get_fd(const SSL *s)
1314 {
1315 return SSL_get_rfd(s);
1316 }
1317
SSL_get_rfd(const SSL * s)1318 int SSL_get_rfd(const SSL *s)
1319 {
1320 int ret = -1;
1321 BIO *b, *r;
1322
1323 b = SSL_get_rbio(s);
1324 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1325 if (r != NULL)
1326 BIO_get_fd(r, &ret);
1327 return ret;
1328 }
1329
SSL_get_wfd(const SSL * s)1330 int SSL_get_wfd(const SSL *s)
1331 {
1332 int ret = -1;
1333 BIO *b, *r;
1334
1335 b = SSL_get_wbio(s);
1336 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1337 if (r != NULL)
1338 BIO_get_fd(r, &ret);
1339 return ret;
1340 }
1341
1342 #ifndef OPENSSL_NO_SOCK
SSL_set_fd(SSL * s,int fd)1343 int SSL_set_fd(SSL *s, int fd)
1344 {
1345 int ret = 0;
1346 BIO *bio = NULL;
1347
1348 bio = BIO_new(BIO_s_socket());
1349
1350 if (bio == NULL) {
1351 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
1352 goto err;
1353 }
1354 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1355 SSL_set_bio(s, bio, bio);
1356 ret = 1;
1357 err:
1358 return ret;
1359 }
1360
SSL_set_wfd(SSL * s,int fd)1361 int SSL_set_wfd(SSL *s, int fd)
1362 {
1363 BIO *rbio = SSL_get_rbio(s);
1364
1365 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
1366 || (int)BIO_get_fd(rbio, NULL) != fd) {
1367 BIO *bio = BIO_new(BIO_s_socket());
1368
1369 if (bio == NULL) {
1370 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB);
1371 return 0;
1372 }
1373 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1374 SSL_set0_wbio(s, bio);
1375 } else {
1376 BIO_up_ref(rbio);
1377 SSL_set0_wbio(s, rbio);
1378 }
1379 return 1;
1380 }
1381
SSL_set_rfd(SSL * s,int fd)1382 int SSL_set_rfd(SSL *s, int fd)
1383 {
1384 BIO *wbio = SSL_get_wbio(s);
1385
1386 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
1387 || ((int)BIO_get_fd(wbio, NULL) != fd)) {
1388 BIO *bio = BIO_new(BIO_s_socket());
1389
1390 if (bio == NULL) {
1391 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB);
1392 return 0;
1393 }
1394 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1395 SSL_set0_rbio(s, bio);
1396 } else {
1397 BIO_up_ref(wbio);
1398 SSL_set0_rbio(s, wbio);
1399 }
1400
1401 return 1;
1402 }
1403 #endif
1404
1405 /* return length of latest Finished message we sent, copy to 'buf' */
SSL_get_finished(const SSL * s,void * buf,size_t count)1406 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
1407 {
1408 size_t ret = 0;
1409
1410 if (s->s3 != NULL) {
1411 ret = s->s3->tmp.finish_md_len;
1412 if (count > ret)
1413 count = ret;
1414 memcpy(buf, s->s3->tmp.finish_md, count);
1415 }
1416 return ret;
1417 }
1418
1419 /* return length of latest Finished message we expected, copy to 'buf' */
SSL_get_peer_finished(const SSL * s,void * buf,size_t count)1420 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
1421 {
1422 size_t ret = 0;
1423
1424 if (s->s3 != NULL) {
1425 ret = s->s3->tmp.peer_finish_md_len;
1426 if (count > ret)
1427 count = ret;
1428 memcpy(buf, s->s3->tmp.peer_finish_md, count);
1429 }
1430 return ret;
1431 }
1432
SSL_get_verify_mode(const SSL * s)1433 int SSL_get_verify_mode(const SSL *s)
1434 {
1435 return s->verify_mode;
1436 }
1437
SSL_get_verify_depth(const SSL * s)1438 int SSL_get_verify_depth(const SSL *s)
1439 {
1440 return X509_VERIFY_PARAM_get_depth(s->param);
1441 }
1442
SSL_get_verify_callback(const SSL * s)1443 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
1444 return s->verify_callback;
1445 }
1446
SSL_CTX_get_verify_mode(const SSL_CTX * ctx)1447 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
1448 {
1449 return ctx->verify_mode;
1450 }
1451
SSL_CTX_get_verify_depth(const SSL_CTX * ctx)1452 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
1453 {
1454 return X509_VERIFY_PARAM_get_depth(ctx->param);
1455 }
1456
SSL_CTX_get_verify_callback(const SSL_CTX * ctx)1457 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
1458 return ctx->default_verify_callback;
1459 }
1460
SSL_set_verify(SSL * s,int mode,int (* callback)(int ok,X509_STORE_CTX * ctx))1461 void SSL_set_verify(SSL *s, int mode,
1462 int (*callback) (int ok, X509_STORE_CTX *ctx))
1463 {
1464 s->verify_mode = mode;
1465 if (callback != NULL)
1466 s->verify_callback = callback;
1467 }
1468
SSL_set_verify_depth(SSL * s,int depth)1469 void SSL_set_verify_depth(SSL *s, int depth)
1470 {
1471 X509_VERIFY_PARAM_set_depth(s->param, depth);
1472 }
1473
SSL_set_read_ahead(SSL * s,int yes)1474 void SSL_set_read_ahead(SSL *s, int yes)
1475 {
1476 RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
1477 }
1478
SSL_get_read_ahead(const SSL * s)1479 int SSL_get_read_ahead(const SSL *s)
1480 {
1481 return RECORD_LAYER_get_read_ahead(&s->rlayer);
1482 }
1483
SSL_pending(const SSL * s)1484 int SSL_pending(const SSL *s)
1485 {
1486 size_t pending = s->method->ssl_pending(s);
1487
1488 /*
1489 * SSL_pending cannot work properly if read-ahead is enabled
1490 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
1491 * impossible to fix since SSL_pending cannot report errors that may be
1492 * observed while scanning the new data. (Note that SSL_pending() is
1493 * often used as a boolean value, so we'd better not return -1.)
1494 *
1495 * SSL_pending also cannot work properly if the value >INT_MAX. In that case
1496 * we just return INT_MAX.
1497 */
1498 return pending < INT_MAX ? (int)pending : INT_MAX;
1499 }
1500
SSL_has_pending(const SSL * s)1501 int SSL_has_pending(const SSL *s)
1502 {
1503 /*
1504 * Similar to SSL_pending() but returns a 1 to indicate that we have
1505 * unprocessed data available or 0 otherwise (as opposed to the number of
1506 * bytes available). Unlike SSL_pending() this will take into account
1507 * read_ahead data. A 1 return simply indicates that we have unprocessed
1508 * data. That data may not result in any application data, or we may fail
1509 * to parse the records for some reason.
1510 */
1511 if (RECORD_LAYER_processed_read_pending(&s->rlayer))
1512 return 1;
1513
1514 return RECORD_LAYER_read_pending(&s->rlayer);
1515 }
1516
SSL_get_peer_certificate(const SSL * s)1517 X509 *SSL_get_peer_certificate(const SSL *s)
1518 {
1519 X509 *r;
1520
1521 if ((s == NULL) || (s->session == NULL))
1522 r = NULL;
1523 else
1524 r = s->session->peer;
1525
1526 if (r == NULL)
1527 return r;
1528
1529 X509_up_ref(r);
1530
1531 return r;
1532 }
1533
STACK_OF(X509)1534 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
1535 {
1536 STACK_OF(X509) *r;
1537
1538 if ((s == NULL) || (s->session == NULL))
1539 r = NULL;
1540 else
1541 r = s->session->peer_chain;
1542
1543 /*
1544 * If we are a client, cert_chain includes the peer's own certificate; if
1545 * we are a server, it does not.
1546 */
1547
1548 return r;
1549 }
1550
1551 /*
1552 * Now in theory, since the calling process own 't' it should be safe to
1553 * modify. We need to be able to read f without being hassled
1554 */
SSL_copy_session_id(SSL * t,const SSL * f)1555 int SSL_copy_session_id(SSL *t, const SSL *f)
1556 {
1557 int i;
1558 /* Do we need to to SSL locking? */
1559 if (!SSL_set_session(t, SSL_get_session(f))) {
1560 return 0;
1561 }
1562
1563 /*
1564 * what if we are setup for one protocol version but want to talk another
1565 */
1566 if (t->method != f->method) {
1567 t->method->ssl_free(t);
1568 t->method = f->method;
1569 if (t->method->ssl_new(t) == 0)
1570 return 0;
1571 }
1572
1573 CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock);
1574 ssl_cert_free(t->cert);
1575 t->cert = f->cert;
1576 if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
1577 return 0;
1578 }
1579
1580 return 1;
1581 }
1582
1583 /* Fix this so it checks all the valid key/cert options */
SSL_CTX_check_private_key(const SSL_CTX * ctx)1584 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
1585 {
1586 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
1587 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1588 return 0;
1589 }
1590 if (ctx->cert->key->privatekey == NULL) {
1591 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1592 return 0;
1593 }
1594 return X509_check_private_key
1595 (ctx->cert->key->x509, ctx->cert->key->privatekey);
1596 }
1597
1598 /* Fix this function so that it takes an optional type parameter */
SSL_check_private_key(const SSL * ssl)1599 int SSL_check_private_key(const SSL *ssl)
1600 {
1601 if (ssl == NULL) {
1602 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
1603 return 0;
1604 }
1605 if (ssl->cert->key->x509 == NULL) {
1606 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1607 return 0;
1608 }
1609 if (ssl->cert->key->privatekey == NULL) {
1610 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1611 return 0;
1612 }
1613 return X509_check_private_key(ssl->cert->key->x509,
1614 ssl->cert->key->privatekey);
1615 }
1616
SSL_waiting_for_async(SSL * s)1617 int SSL_waiting_for_async(SSL *s)
1618 {
1619 if (s->job)
1620 return 1;
1621
1622 return 0;
1623 }
1624
SSL_get_all_async_fds(SSL * s,OSSL_ASYNC_FD * fds,size_t * numfds)1625 int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
1626 {
1627 ASYNC_WAIT_CTX *ctx = s->waitctx;
1628
1629 if (ctx == NULL)
1630 return 0;
1631 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
1632 }
1633
SSL_get_changed_async_fds(SSL * s,OSSL_ASYNC_FD * addfd,size_t * numaddfds,OSSL_ASYNC_FD * delfd,size_t * numdelfds)1634 int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
1635 OSSL_ASYNC_FD *delfd, size_t *numdelfds)
1636 {
1637 ASYNC_WAIT_CTX *ctx = s->waitctx;
1638
1639 if (ctx == NULL)
1640 return 0;
1641 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
1642 numdelfds);
1643 }
1644
SSL_accept(SSL * s)1645 int SSL_accept(SSL *s)
1646 {
1647 if (s->handshake_func == NULL) {
1648 /* Not properly initialized yet */
1649 SSL_set_accept_state(s);
1650 }
1651
1652 return SSL_do_handshake(s);
1653 }
1654
SSL_connect(SSL * s)1655 int SSL_connect(SSL *s)
1656 {
1657 if (s->handshake_func == NULL) {
1658 /* Not properly initialized yet */
1659 SSL_set_connect_state(s);
1660 }
1661
1662 return SSL_do_handshake(s);
1663 }
1664
SSL_get_default_timeout(const SSL * s)1665 long SSL_get_default_timeout(const SSL *s)
1666 {
1667 return s->method->get_timeout();
1668 }
1669
ssl_start_async_job(SSL * s,struct ssl_async_args * args,int (* func)(void *))1670 static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
1671 int (*func) (void *))
1672 {
1673 int ret;
1674 if (s->waitctx == NULL) {
1675 s->waitctx = ASYNC_WAIT_CTX_new();
1676 if (s->waitctx == NULL)
1677 return -1;
1678 }
1679 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args,
1680 sizeof(struct ssl_async_args))) {
1681 case ASYNC_ERR:
1682 s->rwstate = SSL_NOTHING;
1683 SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC);
1684 return -1;
1685 case ASYNC_PAUSE:
1686 s->rwstate = SSL_ASYNC_PAUSED;
1687 return -1;
1688 case ASYNC_NO_JOBS:
1689 s->rwstate = SSL_ASYNC_NO_JOBS;
1690 return -1;
1691 case ASYNC_FINISH:
1692 s->job = NULL;
1693 return ret;
1694 default:
1695 s->rwstate = SSL_NOTHING;
1696 SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR);
1697 /* Shouldn't happen */
1698 return -1;
1699 }
1700 }
1701
ssl_io_intern(void * vargs)1702 static int ssl_io_intern(void *vargs)
1703 {
1704 struct ssl_async_args *args;
1705 SSL *s;
1706 void *buf;
1707 size_t num;
1708
1709 args = (struct ssl_async_args *)vargs;
1710 s = args->s;
1711 buf = args->buf;
1712 num = args->num;
1713 switch (args->type) {
1714 case READFUNC:
1715 return args->f.func_read(s, buf, num, &s->asyncrw);
1716 case WRITEFUNC:
1717 return args->f.func_write(s, buf, num, &s->asyncrw);
1718 case OTHERFUNC:
1719 return args->f.func_other(s);
1720 }
1721 return -1;
1722 }
1723
ssl_read_internal(SSL * s,void * buf,size_t num,size_t * readbytes)1724 int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1725 {
1726 if (s->handshake_func == NULL) {
1727 SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED);
1728 return -1;
1729 }
1730
1731 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1732 s->rwstate = SSL_NOTHING;
1733 return 0;
1734 }
1735
1736 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1737 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
1738 SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1739 return 0;
1740 }
1741 /*
1742 * If we are a client and haven't received the ServerHello etc then we
1743 * better do that
1744 */
1745 ossl_statem_check_finish_init(s, 0);
1746
1747 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1748 struct ssl_async_args args;
1749 int ret;
1750
1751 args.s = s;
1752 args.buf = buf;
1753 args.num = num;
1754 args.type = READFUNC;
1755 args.f.func_read = s->method->ssl_read;
1756
1757 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1758 *readbytes = s->asyncrw;
1759 return ret;
1760 } else {
1761 return s->method->ssl_read(s, buf, num, readbytes);
1762 }
1763 }
1764
SSL_read(SSL * s,void * buf,int num)1765 int SSL_read(SSL *s, void *buf, int num)
1766 {
1767 int ret;
1768 size_t readbytes;
1769
1770 if (num < 0) {
1771 SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH);
1772 return -1;
1773 }
1774
1775 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
1776
1777 /*
1778 * The cast is safe here because ret should be <= INT_MAX because num is
1779 * <= INT_MAX
1780 */
1781 if (ret > 0)
1782 ret = (int)readbytes;
1783
1784 return ret;
1785 }
1786
SSL_read_ex(SSL * s,void * buf,size_t num,size_t * readbytes)1787 int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1788 {
1789 int ret = ssl_read_internal(s, buf, num, readbytes);
1790
1791 if (ret < 0)
1792 ret = 0;
1793 return ret;
1794 }
1795
SSL_read_early_data(SSL * s,void * buf,size_t num,size_t * readbytes)1796 int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
1797 {
1798 int ret;
1799
1800 if (!s->server) {
1801 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1802 return SSL_READ_EARLY_DATA_ERROR;
1803 }
1804
1805 switch (s->early_data_state) {
1806 case SSL_EARLY_DATA_NONE:
1807 if (!SSL_in_before(s)) {
1808 SSLerr(SSL_F_SSL_READ_EARLY_DATA,
1809 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1810 return SSL_READ_EARLY_DATA_ERROR;
1811 }
1812 /* fall through */
1813
1814 case SSL_EARLY_DATA_ACCEPT_RETRY:
1815 s->early_data_state = SSL_EARLY_DATA_ACCEPTING;
1816 ret = SSL_accept(s);
1817 if (ret <= 0) {
1818 /* NBIO or error */
1819 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
1820 return SSL_READ_EARLY_DATA_ERROR;
1821 }
1822 /* fall through */
1823
1824 case SSL_EARLY_DATA_READ_RETRY:
1825 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
1826 s->early_data_state = SSL_EARLY_DATA_READING;
1827 ret = SSL_read_ex(s, buf, num, readbytes);
1828 /*
1829 * State machine will update early_data_state to
1830 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData
1831 * message
1832 */
1833 if (ret > 0 || (ret <= 0 && s->early_data_state
1834 != SSL_EARLY_DATA_FINISHED_READING)) {
1835 s->early_data_state = SSL_EARLY_DATA_READ_RETRY;
1836 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
1837 : SSL_READ_EARLY_DATA_ERROR;
1838 }
1839 } else {
1840 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
1841 }
1842 *readbytes = 0;
1843 return SSL_READ_EARLY_DATA_FINISH;
1844
1845 default:
1846 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1847 return SSL_READ_EARLY_DATA_ERROR;
1848 }
1849 }
1850
SSL_get_early_data_status(const SSL * s)1851 int SSL_get_early_data_status(const SSL *s)
1852 {
1853 return s->ext.early_data;
1854 }
1855
ssl_peek_internal(SSL * s,void * buf,size_t num,size_t * readbytes)1856 static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1857 {
1858 if (s->handshake_func == NULL) {
1859 SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED);
1860 return -1;
1861 }
1862
1863 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1864 return 0;
1865 }
1866 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1867 struct ssl_async_args args;
1868 int ret;
1869
1870 args.s = s;
1871 args.buf = buf;
1872 args.num = num;
1873 args.type = READFUNC;
1874 args.f.func_read = s->method->ssl_peek;
1875
1876 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1877 *readbytes = s->asyncrw;
1878 return ret;
1879 } else {
1880 return s->method->ssl_peek(s, buf, num, readbytes);
1881 }
1882 }
1883
SSL_peek(SSL * s,void * buf,int num)1884 int SSL_peek(SSL *s, void *buf, int num)
1885 {
1886 int ret;
1887 size_t readbytes;
1888
1889 if (num < 0) {
1890 SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH);
1891 return -1;
1892 }
1893
1894 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
1895
1896 /*
1897 * The cast is safe here because ret should be <= INT_MAX because num is
1898 * <= INT_MAX
1899 */
1900 if (ret > 0)
1901 ret = (int)readbytes;
1902
1903 return ret;
1904 }
1905
1906
SSL_peek_ex(SSL * s,void * buf,size_t num,size_t * readbytes)1907 int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1908 {
1909 int ret = ssl_peek_internal(s, buf, num, readbytes);
1910
1911 if (ret < 0)
1912 ret = 0;
1913 return ret;
1914 }
1915
ssl_write_internal(SSL * s,const void * buf,size_t num,size_t * written)1916 int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
1917 {
1918 if (s->handshake_func == NULL) {
1919 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED);
1920 return -1;
1921 }
1922
1923 if (s->shutdown & SSL_SENT_SHUTDOWN) {
1924 s->rwstate = SSL_NOTHING;
1925 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN);
1926 return -1;
1927 }
1928
1929 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1930 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY
1931 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
1932 SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1933 return 0;
1934 }
1935 /* If we are a client and haven't sent the Finished we better do that */
1936 ossl_statem_check_finish_init(s, 1);
1937
1938 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1939 int ret;
1940 struct ssl_async_args args;
1941
1942 args.s = s;
1943 args.buf = (void *)buf;
1944 args.num = num;
1945 args.type = WRITEFUNC;
1946 args.f.func_write = s->method->ssl_write;
1947
1948 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1949 *written = s->asyncrw;
1950 return ret;
1951 } else {
1952 return s->method->ssl_write(s, buf, num, written);
1953 }
1954 }
1955
SSL_write(SSL * s,const void * buf,int num)1956 int SSL_write(SSL *s, const void *buf, int num)
1957 {
1958 int ret;
1959 size_t written;
1960
1961 if (num < 0) {
1962 SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH);
1963 return -1;
1964 }
1965
1966 ret = ssl_write_internal(s, buf, (size_t)num, &written);
1967
1968 /*
1969 * The cast is safe here because ret should be <= INT_MAX because num is
1970 * <= INT_MAX
1971 */
1972 if (ret > 0)
1973 ret = (int)written;
1974
1975 return ret;
1976 }
1977
SSL_write_ex(SSL * s,const void * buf,size_t num,size_t * written)1978 int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
1979 {
1980 int ret = ssl_write_internal(s, buf, num, written);
1981
1982 if (ret < 0)
1983 ret = 0;
1984 return ret;
1985 }
1986
SSL_write_early_data(SSL * s,const void * buf,size_t num,size_t * written)1987 int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
1988 {
1989 int ret, early_data_state;
1990 size_t writtmp;
1991 uint32_t partialwrite;
1992
1993 switch (s->early_data_state) {
1994 case SSL_EARLY_DATA_NONE:
1995 if (s->server
1996 || !SSL_in_before(s)
1997 || ((s->session == NULL || s->session->ext.max_early_data == 0)
1998 && (s->psk_use_session_cb == NULL))) {
1999 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA,
2000 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2001 return 0;
2002 }
2003 /* fall through */
2004
2005 case SSL_EARLY_DATA_CONNECT_RETRY:
2006 s->early_data_state = SSL_EARLY_DATA_CONNECTING;
2007 ret = SSL_connect(s);
2008 if (ret <= 0) {
2009 /* NBIO or error */
2010 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
2011 return 0;
2012 }
2013 /* fall through */
2014
2015 case SSL_EARLY_DATA_WRITE_RETRY:
2016 s->early_data_state = SSL_EARLY_DATA_WRITING;
2017 /*
2018 * We disable partial write for early data because we don't keep track
2019 * of how many bytes we've written between the SSL_write_ex() call and
2020 * the flush if the flush needs to be retried)
2021 */
2022 partialwrite = s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE;
2023 s->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE;
2024 ret = SSL_write_ex(s, buf, num, &writtmp);
2025 s->mode |= partialwrite;
2026 if (!ret) {
2027 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2028 return ret;
2029 }
2030 s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH;
2031 /* fall through */
2032
2033 case SSL_EARLY_DATA_WRITE_FLUSH:
2034 /* The buffering BIO is still in place so we need to flush it */
2035 if (statem_flush(s) != 1)
2036 return 0;
2037 *written = num;
2038 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2039 return 1;
2040
2041 case SSL_EARLY_DATA_FINISHED_READING:
2042 case SSL_EARLY_DATA_READ_RETRY:
2043 early_data_state = s->early_data_state;
2044 /* We are a server writing to an unauthenticated client */
2045 s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING;
2046 ret = SSL_write_ex(s, buf, num, written);
2047 /* The buffering BIO is still in place */
2048 if (ret)
2049 (void)BIO_flush(s->wbio);
2050 s->early_data_state = early_data_state;
2051 return ret;
2052
2053 default:
2054 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2055 return 0;
2056 }
2057 }
2058
SSL_shutdown(SSL * s)2059 int SSL_shutdown(SSL *s)
2060 {
2061 /*
2062 * Note that this function behaves differently from what one might
2063 * expect. Return values are 0 for no success (yet), 1 for success; but
2064 * calling it once is usually not enough, even if blocking I/O is used
2065 * (see ssl3_shutdown).
2066 */
2067
2068 if (s->handshake_func == NULL) {
2069 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
2070 return -1;
2071 }
2072
2073 if (!SSL_in_init(s)) {
2074 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2075 struct ssl_async_args args;
2076
2077 args.s = s;
2078 args.type = OTHERFUNC;
2079 args.f.func_other = s->method->ssl_shutdown;
2080
2081 return ssl_start_async_job(s, &args, ssl_io_intern);
2082 } else {
2083 return s->method->ssl_shutdown(s);
2084 }
2085 } else {
2086 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT);
2087 return -1;
2088 }
2089 }
2090
SSL_key_update(SSL * s,int updatetype)2091 int SSL_key_update(SSL *s, int updatetype)
2092 {
2093 /*
2094 * TODO(TLS1.3): How will applications know whether TLSv1.3 has been
2095 * negotiated, and that it is appropriate to call SSL_key_update() instead
2096 * of SSL_renegotiate().
2097 */
2098 if (!SSL_IS_TLS13(s)) {
2099 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION);
2100 return 0;
2101 }
2102
2103 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
2104 && updatetype != SSL_KEY_UPDATE_REQUESTED) {
2105 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE);
2106 return 0;
2107 }
2108
2109 if (!SSL_is_init_finished(s)) {
2110 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT);
2111 return 0;
2112 }
2113
2114 ossl_statem_set_in_init(s, 1);
2115 s->key_update = updatetype;
2116 return 1;
2117 }
2118
SSL_get_key_update_type(const SSL * s)2119 int SSL_get_key_update_type(const SSL *s)
2120 {
2121 return s->key_update;
2122 }
2123
SSL_renegotiate(SSL * s)2124 int SSL_renegotiate(SSL *s)
2125 {
2126 if (SSL_IS_TLS13(s)) {
2127 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION);
2128 return 0;
2129 }
2130
2131 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2132 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION);
2133 return 0;
2134 }
2135
2136 s->renegotiate = 1;
2137 s->new_session = 1;
2138
2139 return s->method->ssl_renegotiate(s);
2140 }
2141
SSL_renegotiate_abbreviated(SSL * s)2142 int SSL_renegotiate_abbreviated(SSL *s)
2143 {
2144 if (SSL_IS_TLS13(s)) {
2145 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION);
2146 return 0;
2147 }
2148
2149 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2150 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION);
2151 return 0;
2152 }
2153
2154 s->renegotiate = 1;
2155 s->new_session = 0;
2156
2157 return s->method->ssl_renegotiate(s);
2158 }
2159
SSL_renegotiate_pending(const SSL * s)2160 int SSL_renegotiate_pending(const SSL *s)
2161 {
2162 /*
2163 * becomes true when negotiation is requested; false again once a
2164 * handshake has finished
2165 */
2166 return (s->renegotiate != 0);
2167 }
2168
SSL_ctrl(SSL * s,int cmd,long larg,void * parg)2169 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
2170 {
2171 long l;
2172
2173 switch (cmd) {
2174 case SSL_CTRL_GET_READ_AHEAD:
2175 return RECORD_LAYER_get_read_ahead(&s->rlayer);
2176 case SSL_CTRL_SET_READ_AHEAD:
2177 l = RECORD_LAYER_get_read_ahead(&s->rlayer);
2178 RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
2179 return l;
2180
2181 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2182 s->msg_callback_arg = parg;
2183 return 1;
2184
2185 case SSL_CTRL_MODE:
2186 return (s->mode |= larg);
2187 case SSL_CTRL_CLEAR_MODE:
2188 return (s->mode &= ~larg);
2189 case SSL_CTRL_GET_MAX_CERT_LIST:
2190 return (long)s->max_cert_list;
2191 case SSL_CTRL_SET_MAX_CERT_LIST:
2192 if (larg < 0)
2193 return 0;
2194 l = (long)s->max_cert_list;
2195 s->max_cert_list = (size_t)larg;
2196 return l;
2197 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2198 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2199 return 0;
2200 s->max_send_fragment = larg;
2201 if (s->max_send_fragment < s->split_send_fragment)
2202 s->split_send_fragment = s->max_send_fragment;
2203 return 1;
2204 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2205 if ((size_t)larg > s->max_send_fragment || larg == 0)
2206 return 0;
2207 s->split_send_fragment = larg;
2208 return 1;
2209 case SSL_CTRL_SET_MAX_PIPELINES:
2210 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2211 return 0;
2212 s->max_pipelines = larg;
2213 if (larg > 1)
2214 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
2215 return 1;
2216 case SSL_CTRL_GET_RI_SUPPORT:
2217 if (s->s3)
2218 return s->s3->send_connection_binding;
2219 else
2220 return 0;
2221 case SSL_CTRL_CERT_FLAGS:
2222 return (s->cert->cert_flags |= larg);
2223 case SSL_CTRL_CLEAR_CERT_FLAGS:
2224 return (s->cert->cert_flags &= ~larg);
2225
2226 case SSL_CTRL_GET_RAW_CIPHERLIST:
2227 if (parg) {
2228 if (s->s3->tmp.ciphers_raw == NULL)
2229 return 0;
2230 *(unsigned char **)parg = s->s3->tmp.ciphers_raw;
2231 return (int)s->s3->tmp.ciphers_rawlen;
2232 } else {
2233 return TLS_CIPHER_LEN;
2234 }
2235 case SSL_CTRL_GET_EXTMS_SUPPORT:
2236 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
2237 return -1;
2238 if (s->session->flags & SSL_SESS_FLAG_EXTMS)
2239 return 1;
2240 else
2241 return 0;
2242 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2243 return ssl_check_allowed_versions(larg, s->max_proto_version)
2244 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2245 &s->min_proto_version);
2246 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2247 return s->min_proto_version;
2248 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2249 return ssl_check_allowed_versions(s->min_proto_version, larg)
2250 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2251 &s->max_proto_version);
2252 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2253 return s->max_proto_version;
2254 default:
2255 return s->method->ssl_ctrl(s, cmd, larg, parg);
2256 }
2257 }
2258
SSL_callback_ctrl(SSL * s,int cmd,void (* fp)(void))2259 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
2260 {
2261 switch (cmd) {
2262 case SSL_CTRL_SET_MSG_CALLBACK:
2263 s->msg_callback = (void (*)
2264 (int write_p, int version, int content_type,
2265 const void *buf, size_t len, SSL *ssl,
2266 void *arg))(fp);
2267 return 1;
2268
2269 default:
2270 return s->method->ssl_callback_ctrl(s, cmd, fp);
2271 }
2272 }
2273
LHASH_OF(SSL_SESSION)2274 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
2275 {
2276 return ctx->sessions;
2277 }
2278
SSL_CTX_ctrl(SSL_CTX * ctx,int cmd,long larg,void * parg)2279 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
2280 {
2281 long l;
2282 /* For some cases with ctx == NULL perform syntax checks */
2283 if (ctx == NULL) {
2284 switch (cmd) {
2285 #ifndef OPENSSL_NO_EC
2286 case SSL_CTRL_SET_GROUPS_LIST:
2287 return tls1_set_groups_list(NULL, NULL, parg);
2288 #endif
2289 case SSL_CTRL_SET_SIGALGS_LIST:
2290 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
2291 return tls1_set_sigalgs_list(NULL, parg, 0);
2292 default:
2293 return 0;
2294 }
2295 }
2296
2297 switch (cmd) {
2298 case SSL_CTRL_GET_READ_AHEAD:
2299 return ctx->read_ahead;
2300 case SSL_CTRL_SET_READ_AHEAD:
2301 l = ctx->read_ahead;
2302 ctx->read_ahead = larg;
2303 return l;
2304
2305 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2306 ctx->msg_callback_arg = parg;
2307 return 1;
2308
2309 case SSL_CTRL_GET_MAX_CERT_LIST:
2310 return (long)ctx->max_cert_list;
2311 case SSL_CTRL_SET_MAX_CERT_LIST:
2312 if (larg < 0)
2313 return 0;
2314 l = (long)ctx->max_cert_list;
2315 ctx->max_cert_list = (size_t)larg;
2316 return l;
2317
2318 case SSL_CTRL_SET_SESS_CACHE_SIZE:
2319 if (larg < 0)
2320 return 0;
2321 l = (long)ctx->session_cache_size;
2322 ctx->session_cache_size = (size_t)larg;
2323 return l;
2324 case SSL_CTRL_GET_SESS_CACHE_SIZE:
2325 return (long)ctx->session_cache_size;
2326 case SSL_CTRL_SET_SESS_CACHE_MODE:
2327 l = ctx->session_cache_mode;
2328 ctx->session_cache_mode = larg;
2329 return l;
2330 case SSL_CTRL_GET_SESS_CACHE_MODE:
2331 return ctx->session_cache_mode;
2332
2333 case SSL_CTRL_SESS_NUMBER:
2334 return lh_SSL_SESSION_num_items(ctx->sessions);
2335 case SSL_CTRL_SESS_CONNECT:
2336 return tsan_load(&ctx->stats.sess_connect);
2337 case SSL_CTRL_SESS_CONNECT_GOOD:
2338 return tsan_load(&ctx->stats.sess_connect_good);
2339 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
2340 return tsan_load(&ctx->stats.sess_connect_renegotiate);
2341 case SSL_CTRL_SESS_ACCEPT:
2342 return tsan_load(&ctx->stats.sess_accept);
2343 case SSL_CTRL_SESS_ACCEPT_GOOD:
2344 return tsan_load(&ctx->stats.sess_accept_good);
2345 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
2346 return tsan_load(&ctx->stats.sess_accept_renegotiate);
2347 case SSL_CTRL_SESS_HIT:
2348 return tsan_load(&ctx->stats.sess_hit);
2349 case SSL_CTRL_SESS_CB_HIT:
2350 return tsan_load(&ctx->stats.sess_cb_hit);
2351 case SSL_CTRL_SESS_MISSES:
2352 return tsan_load(&ctx->stats.sess_miss);
2353 case SSL_CTRL_SESS_TIMEOUTS:
2354 return tsan_load(&ctx->stats.sess_timeout);
2355 case SSL_CTRL_SESS_CACHE_FULL:
2356 return tsan_load(&ctx->stats.sess_cache_full);
2357 case SSL_CTRL_MODE:
2358 return (ctx->mode |= larg);
2359 case SSL_CTRL_CLEAR_MODE:
2360 return (ctx->mode &= ~larg);
2361 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2362 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2363 return 0;
2364 ctx->max_send_fragment = larg;
2365 if (ctx->max_send_fragment < ctx->split_send_fragment)
2366 ctx->split_send_fragment = ctx->max_send_fragment;
2367 return 1;
2368 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2369 if ((size_t)larg > ctx->max_send_fragment || larg == 0)
2370 return 0;
2371 ctx->split_send_fragment = larg;
2372 return 1;
2373 case SSL_CTRL_SET_MAX_PIPELINES:
2374 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2375 return 0;
2376 ctx->max_pipelines = larg;
2377 return 1;
2378 case SSL_CTRL_CERT_FLAGS:
2379 return (ctx->cert->cert_flags |= larg);
2380 case SSL_CTRL_CLEAR_CERT_FLAGS:
2381 return (ctx->cert->cert_flags &= ~larg);
2382 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2383 return ssl_check_allowed_versions(larg, ctx->max_proto_version)
2384 && ssl_set_version_bound(ctx->method->version, (int)larg,
2385 &ctx->min_proto_version);
2386 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2387 return ctx->min_proto_version;
2388 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2389 return ssl_check_allowed_versions(ctx->min_proto_version, larg)
2390 && ssl_set_version_bound(ctx->method->version, (int)larg,
2391 &ctx->max_proto_version);
2392 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2393 return ctx->max_proto_version;
2394 default:
2395 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg);
2396 }
2397 }
2398
SSL_CTX_callback_ctrl(SSL_CTX * ctx,int cmd,void (* fp)(void))2399 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
2400 {
2401 switch (cmd) {
2402 case SSL_CTRL_SET_MSG_CALLBACK:
2403 ctx->msg_callback = (void (*)
2404 (int write_p, int version, int content_type,
2405 const void *buf, size_t len, SSL *ssl,
2406 void *arg))(fp);
2407 return 1;
2408
2409 default:
2410 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp);
2411 }
2412 }
2413
ssl_cipher_id_cmp(const SSL_CIPHER * a,const SSL_CIPHER * b)2414 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
2415 {
2416 if (a->id > b->id)
2417 return 1;
2418 if (a->id < b->id)
2419 return -1;
2420 return 0;
2421 }
2422
ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const * ap,const SSL_CIPHER * const * bp)2423 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
2424 const SSL_CIPHER *const *bp)
2425 {
2426 if ((*ap)->id > (*bp)->id)
2427 return 1;
2428 if ((*ap)->id < (*bp)->id)
2429 return -1;
2430 return 0;
2431 }
2432
2433 /** return a STACK of the ciphers available for the SSL and in order of
2434 * preference */
STACK_OF(SSL_CIPHER)2435 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
2436 {
2437 if (s != NULL) {
2438 if (s->cipher_list != NULL) {
2439 return s->cipher_list;
2440 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
2441 return s->ctx->cipher_list;
2442 }
2443 }
2444 return NULL;
2445 }
2446
STACK_OF(SSL_CIPHER)2447 STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
2448 {
2449 if ((s == NULL) || !s->server)
2450 return NULL;
2451 return s->peer_ciphers;
2452 }
2453
STACK_OF(SSL_CIPHER)2454 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
2455 {
2456 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
2457 int i;
2458
2459 ciphers = SSL_get_ciphers(s);
2460 if (!ciphers)
2461 return NULL;
2462 if (!ssl_set_client_disabled(s))
2463 return NULL;
2464 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
2465 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
2466 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) {
2467 if (!sk)
2468 sk = sk_SSL_CIPHER_new_null();
2469 if (!sk)
2470 return NULL;
2471 if (!sk_SSL_CIPHER_push(sk, c)) {
2472 sk_SSL_CIPHER_free(sk);
2473 return NULL;
2474 }
2475 }
2476 }
2477 return sk;
2478 }
2479
2480 /** return a STACK of the ciphers available for the SSL and in order of
2481 * algorithm id */
STACK_OF(SSL_CIPHER)2482 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
2483 {
2484 if (s != NULL) {
2485 if (s->cipher_list_by_id != NULL) {
2486 return s->cipher_list_by_id;
2487 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
2488 return s->ctx->cipher_list_by_id;
2489 }
2490 }
2491 return NULL;
2492 }
2493
2494 /** The old interface to get the same thing as SSL_get_ciphers() */
SSL_get_cipher_list(const SSL * s,int n)2495 const char *SSL_get_cipher_list(const SSL *s, int n)
2496 {
2497 const SSL_CIPHER *c;
2498 STACK_OF(SSL_CIPHER) *sk;
2499
2500 if (s == NULL)
2501 return NULL;
2502 sk = SSL_get_ciphers(s);
2503 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
2504 return NULL;
2505 c = sk_SSL_CIPHER_value(sk, n);
2506 if (c == NULL)
2507 return NULL;
2508 return c->name;
2509 }
2510
2511 /** return a STACK of the ciphers available for the SSL_CTX and in order of
2512 * preference */
STACK_OF(SSL_CIPHER)2513 STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
2514 {
2515 if (ctx != NULL)
2516 return ctx->cipher_list;
2517 return NULL;
2518 }
2519
2520 /*
2521 * Distinguish between ciphers controlled by set_ciphersuite() and
2522 * set_cipher_list() when counting.
2523 */
cipher_list_tls12_num(STACK_OF (SSL_CIPHER)* sk)2524 static int cipher_list_tls12_num(STACK_OF(SSL_CIPHER) *sk)
2525 {
2526 int i, num = 0;
2527 const SSL_CIPHER *c;
2528
2529 if (sk == NULL)
2530 return 0;
2531 for (i = 0; i < sk_SSL_CIPHER_num(sk); ++i) {
2532 c = sk_SSL_CIPHER_value(sk, i);
2533 if (c->min_tls >= TLS1_3_VERSION)
2534 continue;
2535 num++;
2536 }
2537 return num;
2538 }
2539
2540 /** specify the ciphers to be used by default by the SSL_CTX */
SSL_CTX_set_cipher_list(SSL_CTX * ctx,const char * str)2541 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
2542 {
2543 STACK_OF(SSL_CIPHER) *sk;
2544
2545 sk = ssl_create_cipher_list(ctx->method, ctx->tls13_ciphersuites,
2546 &ctx->cipher_list, &ctx->cipher_list_by_id, str,
2547 ctx->cert);
2548 /*
2549 * ssl_create_cipher_list may return an empty stack if it was unable to
2550 * find a cipher matching the given rule string (for example if the rule
2551 * string specifies a cipher which has been disabled). This is not an
2552 * error as far as ssl_create_cipher_list is concerned, and hence
2553 * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
2554 */
2555 if (sk == NULL)
2556 return 0;
2557 else if (cipher_list_tls12_num(sk) == 0) {
2558 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2559 return 0;
2560 }
2561 return 1;
2562 }
2563
2564 /** specify the ciphers to be used by the SSL */
SSL_set_cipher_list(SSL * s,const char * str)2565 int SSL_set_cipher_list(SSL *s, const char *str)
2566 {
2567 STACK_OF(SSL_CIPHER) *sk;
2568
2569 sk = ssl_create_cipher_list(s->ctx->method, s->tls13_ciphersuites,
2570 &s->cipher_list, &s->cipher_list_by_id, str,
2571 s->cert);
2572 /* see comment in SSL_CTX_set_cipher_list */
2573 if (sk == NULL)
2574 return 0;
2575 else if (cipher_list_tls12_num(sk) == 0) {
2576 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2577 return 0;
2578 }
2579 return 1;
2580 }
2581
SSL_get_shared_ciphers(const SSL * s,char * buf,int size)2582 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size)
2583 {
2584 char *p;
2585 STACK_OF(SSL_CIPHER) *clntsk, *srvrsk;
2586 const SSL_CIPHER *c;
2587 int i;
2588
2589 if (!s->server
2590 || s->peer_ciphers == NULL
2591 || size < 2)
2592 return NULL;
2593
2594 p = buf;
2595 clntsk = s->peer_ciphers;
2596 srvrsk = SSL_get_ciphers(s);
2597 if (clntsk == NULL || srvrsk == NULL)
2598 return NULL;
2599
2600 if (sk_SSL_CIPHER_num(clntsk) == 0 || sk_SSL_CIPHER_num(srvrsk) == 0)
2601 return NULL;
2602
2603 for (i = 0; i < sk_SSL_CIPHER_num(clntsk); i++) {
2604 int n;
2605
2606 c = sk_SSL_CIPHER_value(clntsk, i);
2607 if (sk_SSL_CIPHER_find(srvrsk, c) < 0)
2608 continue;
2609
2610 n = strlen(c->name);
2611 if (n + 1 > size) {
2612 if (p != buf)
2613 --p;
2614 *p = '\0';
2615 return buf;
2616 }
2617 strcpy(p, c->name);
2618 p += n;
2619 *(p++) = ':';
2620 size -= n + 1;
2621 }
2622 p[-1] = '\0';
2623 return buf;
2624 }
2625
2626 /** return a servername extension value if provided in Client Hello, or NULL.
2627 * So far, only host_name types are defined (RFC 3546).
2628 */
2629
SSL_get_servername(const SSL * s,const int type)2630 const char *SSL_get_servername(const SSL *s, const int type)
2631 {
2632 if (type != TLSEXT_NAMETYPE_host_name)
2633 return NULL;
2634
2635 /*
2636 * SNI is not negotiated in pre-TLS-1.3 resumption flows, so fake up an
2637 * SNI value to return if we are resuming/resumed. N.B. that we still
2638 * call the relevant callbacks for such resumption flows, and callbacks
2639 * might error out if there is not a SNI value available.
2640 */
2641 if (s->hit)
2642 return s->session->ext.hostname;
2643 return s->ext.hostname;
2644 }
2645
SSL_get_servername_type(const SSL * s)2646 int SSL_get_servername_type(const SSL *s)
2647 {
2648 if (s->session
2649 && (!s->ext.hostname ? s->session->
2650 ext.hostname : s->ext.hostname))
2651 return TLSEXT_NAMETYPE_host_name;
2652 return -1;
2653 }
2654
2655 /*
2656 * SSL_select_next_proto implements the standard protocol selection. It is
2657 * expected that this function is called from the callback set by
2658 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
2659 * vector of 8-bit, length prefixed byte strings. The length byte itself is
2660 * not included in the length. A byte string of length 0 is invalid. No byte
2661 * string may be truncated. The current, but experimental algorithm for
2662 * selecting the protocol is: 1) If the server doesn't support NPN then this
2663 * is indicated to the callback. In this case, the client application has to
2664 * abort the connection or have a default application level protocol. 2) If
2665 * the server supports NPN, but advertises an empty list then the client
2666 * selects the first protocol in its list, but indicates via the API that this
2667 * fallback case was enacted. 3) Otherwise, the client finds the first
2668 * protocol in the server's list that it supports and selects this protocol.
2669 * This is because it's assumed that the server has better information about
2670 * which protocol a client should use. 4) If the client doesn't support any
2671 * of the server's advertised protocols, then this is treated the same as
2672 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
2673 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
2674 */
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)2675 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
2676 const unsigned char *server,
2677 unsigned int server_len,
2678 const unsigned char *client, unsigned int client_len)
2679 {
2680 unsigned int i, j;
2681 const unsigned char *result;
2682 int status = OPENSSL_NPN_UNSUPPORTED;
2683
2684 /*
2685 * For each protocol in server preference order, see if we support it.
2686 */
2687 for (i = 0; i < server_len;) {
2688 for (j = 0; j < client_len;) {
2689 if (server[i] == client[j] &&
2690 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
2691 /* We found a match */
2692 result = &server[i];
2693 status = OPENSSL_NPN_NEGOTIATED;
2694 goto found;
2695 }
2696 j += client[j];
2697 j++;
2698 }
2699 i += server[i];
2700 i++;
2701 }
2702
2703 /* There's no overlap between our protocols and the server's list. */
2704 result = client;
2705 status = OPENSSL_NPN_NO_OVERLAP;
2706
2707 found:
2708 *out = (unsigned char *)result + 1;
2709 *outlen = result[0];
2710 return status;
2711 }
2712
2713 #ifndef OPENSSL_NO_NEXTPROTONEG
2714 /*
2715 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
2716 * client's requested protocol for this connection and returns 0. If the
2717 * client didn't request any protocol, then *data is set to NULL. Note that
2718 * the client can request any protocol it chooses. The value returned from
2719 * this function need not be a member of the list of supported protocols
2720 * provided by the callback.
2721 */
SSL_get0_next_proto_negotiated(const SSL * s,const unsigned char ** data,unsigned * len)2722 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
2723 unsigned *len)
2724 {
2725 *data = s->ext.npn;
2726 if (!*data) {
2727 *len = 0;
2728 } else {
2729 *len = (unsigned int)s->ext.npn_len;
2730 }
2731 }
2732
2733 /*
2734 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
2735 * a TLS server needs a list of supported protocols for Next Protocol
2736 * Negotiation. The returned list must be in wire format. The list is
2737 * returned by setting |out| to point to it and |outlen| to its length. This
2738 * memory will not be modified, but one should assume that the SSL* keeps a
2739 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
2740 * wishes to advertise. Otherwise, no such extension will be included in the
2741 * ServerHello.
2742 */
SSL_CTX_set_npn_advertised_cb(SSL_CTX * ctx,SSL_CTX_npn_advertised_cb_func cb,void * arg)2743 void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
2744 SSL_CTX_npn_advertised_cb_func cb,
2745 void *arg)
2746 {
2747 ctx->ext.npn_advertised_cb = cb;
2748 ctx->ext.npn_advertised_cb_arg = arg;
2749 }
2750
2751 /*
2752 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
2753 * client needs to select a protocol from the server's provided list. |out|
2754 * must be set to point to the selected protocol (which may be within |in|).
2755 * The length of the protocol name must be written into |outlen|. The
2756 * server's advertised protocols are provided in |in| and |inlen|. The
2757 * callback can assume that |in| is syntactically valid. The client must
2758 * select a protocol. It is fatal to the connection if this callback returns
2759 * a value other than SSL_TLSEXT_ERR_OK.
2760 */
SSL_CTX_set_npn_select_cb(SSL_CTX * ctx,SSL_CTX_npn_select_cb_func cb,void * arg)2761 void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
2762 SSL_CTX_npn_select_cb_func cb,
2763 void *arg)
2764 {
2765 ctx->ext.npn_select_cb = cb;
2766 ctx->ext.npn_select_cb_arg = arg;
2767 }
2768 #endif
2769
2770 /*
2771 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
2772 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2773 * length-prefixed strings). Returns 0 on success.
2774 */
SSL_CTX_set_alpn_protos(SSL_CTX * ctx,const unsigned char * protos,unsigned int protos_len)2775 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
2776 unsigned int protos_len)
2777 {
2778 OPENSSL_free(ctx->ext.alpn);
2779 ctx->ext.alpn = OPENSSL_memdup(protos, protos_len);
2780 if (ctx->ext.alpn == NULL) {
2781 SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2782 return 1;
2783 }
2784 ctx->ext.alpn_len = protos_len;
2785
2786 return 0;
2787 }
2788
2789 /*
2790 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
2791 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2792 * length-prefixed strings). Returns 0 on success.
2793 */
SSL_set_alpn_protos(SSL * ssl,const unsigned char * protos,unsigned int protos_len)2794 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
2795 unsigned int protos_len)
2796 {
2797 OPENSSL_free(ssl->ext.alpn);
2798 ssl->ext.alpn = OPENSSL_memdup(protos, protos_len);
2799 if (ssl->ext.alpn == NULL) {
2800 SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2801 return 1;
2802 }
2803 ssl->ext.alpn_len = protos_len;
2804
2805 return 0;
2806 }
2807
2808 /*
2809 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
2810 * called during ClientHello processing in order to select an ALPN protocol
2811 * from the client's list of offered protocols.
2812 */
SSL_CTX_set_alpn_select_cb(SSL_CTX * ctx,SSL_CTX_alpn_select_cb_func cb,void * arg)2813 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
2814 SSL_CTX_alpn_select_cb_func cb,
2815 void *arg)
2816 {
2817 ctx->ext.alpn_select_cb = cb;
2818 ctx->ext.alpn_select_cb_arg = arg;
2819 }
2820
2821 /*
2822 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
2823 * On return it sets |*data| to point to |*len| bytes of protocol name
2824 * (not including the leading length-prefix byte). If the server didn't
2825 * respond with a negotiated protocol then |*len| will be zero.
2826 */
SSL_get0_alpn_selected(const SSL * ssl,const unsigned char ** data,unsigned int * len)2827 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
2828 unsigned int *len)
2829 {
2830 *data = NULL;
2831 if (ssl->s3)
2832 *data = ssl->s3->alpn_selected;
2833 if (*data == NULL)
2834 *len = 0;
2835 else
2836 *len = (unsigned int)ssl->s3->alpn_selected_len;
2837 }
2838
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)2839 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
2840 const char *label, size_t llen,
2841 const unsigned char *context, size_t contextlen,
2842 int use_context)
2843 {
2844 if (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER)
2845 return -1;
2846
2847 return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
2848 llen, context,
2849 contextlen, use_context);
2850 }
2851
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)2852 int SSL_export_keying_material_early(SSL *s, unsigned char *out, size_t olen,
2853 const char *label, size_t llen,
2854 const unsigned char *context,
2855 size_t contextlen)
2856 {
2857 if (s->version != TLS1_3_VERSION)
2858 return 0;
2859
2860 return tls13_export_keying_material_early(s, out, olen, label, llen,
2861 context, contextlen);
2862 }
2863
ssl_session_hash(const SSL_SESSION * a)2864 static unsigned long ssl_session_hash(const SSL_SESSION *a)
2865 {
2866 const unsigned char *session_id = a->session_id;
2867 unsigned long l;
2868 unsigned char tmp_storage[4];
2869
2870 if (a->session_id_length < sizeof(tmp_storage)) {
2871 memset(tmp_storage, 0, sizeof(tmp_storage));
2872 memcpy(tmp_storage, a->session_id, a->session_id_length);
2873 session_id = tmp_storage;
2874 }
2875
2876 l = (unsigned long)
2877 ((unsigned long)session_id[0]) |
2878 ((unsigned long)session_id[1] << 8L) |
2879 ((unsigned long)session_id[2] << 16L) |
2880 ((unsigned long)session_id[3] << 24L);
2881 return l;
2882 }
2883
2884 /*
2885 * NB: If this function (or indeed the hash function which uses a sort of
2886 * coarser function than this one) is changed, ensure
2887 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
2888 * being able to construct an SSL_SESSION that will collide with any existing
2889 * session with a matching session ID.
2890 */
ssl_session_cmp(const SSL_SESSION * a,const SSL_SESSION * b)2891 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
2892 {
2893 if (a->ssl_version != b->ssl_version)
2894 return 1;
2895 if (a->session_id_length != b->session_id_length)
2896 return 1;
2897 return memcmp(a->session_id, b->session_id, a->session_id_length);
2898 }
2899
2900 /*
2901 * These wrapper functions should remain rather than redeclaring
2902 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
2903 * variable. The reason is that the functions aren't static, they're exposed
2904 * via ssl.h.
2905 */
2906
SSL_CTX_new(const SSL_METHOD * meth)2907 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
2908 {
2909 SSL_CTX *ret = NULL;
2910
2911 if (meth == NULL) {
2912 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED);
2913 return NULL;
2914 }
2915
2916 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
2917 return NULL;
2918
2919 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
2920 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
2921 goto err;
2922 }
2923 ret = OPENSSL_zalloc(sizeof(*ret));
2924 if (ret == NULL)
2925 goto err;
2926
2927 ret->method = meth;
2928 ret->min_proto_version = 0;
2929 ret->max_proto_version = 0;
2930 ret->mode = SSL_MODE_AUTO_RETRY;
2931 ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
2932 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
2933 /* We take the system default. */
2934 ret->session_timeout = meth->get_timeout();
2935 ret->references = 1;
2936 ret->lock = CRYPTO_THREAD_lock_new();
2937 if (ret->lock == NULL) {
2938 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
2939 OPENSSL_free(ret);
2940 return NULL;
2941 }
2942 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
2943 ret->verify_mode = SSL_VERIFY_NONE;
2944 if ((ret->cert = ssl_cert_new()) == NULL)
2945 goto err;
2946
2947 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
2948 if (ret->sessions == NULL)
2949 goto err;
2950 ret->cert_store = X509_STORE_new();
2951 if (ret->cert_store == NULL)
2952 goto err;
2953 #ifndef OPENSSL_NO_CT
2954 ret->ctlog_store = CTLOG_STORE_new();
2955 if (ret->ctlog_store == NULL)
2956 goto err;
2957 #endif
2958
2959 if (!SSL_CTX_set_ciphersuites(ret, TLS_DEFAULT_CIPHERSUITES))
2960 goto err;
2961
2962 if (!ssl_create_cipher_list(ret->method,
2963 ret->tls13_ciphersuites,
2964 &ret->cipher_list, &ret->cipher_list_by_id,
2965 SSL_DEFAULT_CIPHER_LIST, ret->cert)
2966 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
2967 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS);
2968 goto err2;
2969 }
2970
2971 ret->param = X509_VERIFY_PARAM_new();
2972 if (ret->param == NULL)
2973 goto err;
2974
2975 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
2976 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
2977 goto err2;
2978 }
2979 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) {
2980 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
2981 goto err2;
2982 }
2983
2984 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL)
2985 goto err;
2986
2987 if ((ret->client_ca_names = sk_X509_NAME_new_null()) == NULL)
2988 goto err;
2989
2990 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
2991 goto err;
2992
2993 if ((ret->ext.secure = OPENSSL_secure_zalloc(sizeof(*ret->ext.secure))) == NULL)
2994 goto err;
2995
2996 /* No compression for DTLS */
2997 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
2998 ret->comp_methods = SSL_COMP_get_compression_methods();
2999
3000 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3001 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
3002
3003 /* Setup RFC5077 ticket keys */
3004 if ((RAND_bytes(ret->ext.tick_key_name,
3005 sizeof(ret->ext.tick_key_name)) <= 0)
3006 || (RAND_priv_bytes(ret->ext.secure->tick_hmac_key,
3007 sizeof(ret->ext.secure->tick_hmac_key)) <= 0)
3008 || (RAND_priv_bytes(ret->ext.secure->tick_aes_key,
3009 sizeof(ret->ext.secure->tick_aes_key)) <= 0))
3010 ret->options |= SSL_OP_NO_TICKET;
3011
3012 if (RAND_priv_bytes(ret->ext.cookie_hmac_key,
3013 sizeof(ret->ext.cookie_hmac_key)) <= 0)
3014 goto err;
3015
3016 #ifndef OPENSSL_NO_SRP
3017 if (!SSL_CTX_SRP_CTX_init(ret))
3018 goto err;
3019 #endif
3020 #ifndef OPENSSL_NO_ENGINE
3021 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
3022 # define eng_strx(x) #x
3023 # define eng_str(x) eng_strx(x)
3024 /* Use specific client engine automatically... ignore errors */
3025 {
3026 ENGINE *eng;
3027 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3028 if (!eng) {
3029 ERR_clear_error();
3030 ENGINE_load_builtin_engines();
3031 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
3032 }
3033 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
3034 ERR_clear_error();
3035 }
3036 # endif
3037 #endif
3038 /*
3039 * Default is to connect to non-RI servers. When RI is more widely
3040 * deployed might change this.
3041 */
3042 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
3043 /*
3044 * Disable compression by default to prevent CRIME. Applications can
3045 * re-enable compression by configuring
3046 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
3047 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3
3048 * middlebox compatibility by default. This may be disabled by default in
3049 * a later OpenSSL version.
3050 */
3051 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT;
3052
3053 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
3054
3055 /*
3056 * We cannot usefully set a default max_early_data here (which gets
3057 * propagated in SSL_new(), for the following reason: setting the
3058 * SSL field causes tls_construct_stoc_early_data() to tell the
3059 * client that early data will be accepted when constructing a TLS 1.3
3060 * session ticket, and the client will accordingly send us early data
3061 * when using that ticket (if the client has early data to send).
3062 * However, in order for the early data to actually be consumed by
3063 * the application, the application must also have calls to
3064 * SSL_read_early_data(); otherwise we'll just skip past the early data
3065 * and ignore it. So, since the application must add calls to
3066 * SSL_read_early_data(), we also require them to add
3067 * calls to SSL_CTX_set_max_early_data() in order to use early data,
3068 * eliminating the bandwidth-wasting early data in the case described
3069 * above.
3070 */
3071 ret->max_early_data = 0;
3072
3073 /*
3074 * Default recv_max_early_data is a fully loaded single record. Could be
3075 * split across multiple records in practice. We set this differently to
3076 * max_early_data so that, in the default case, we do not advertise any
3077 * support for early_data, but if a client were to send us some (e.g.
3078 * because of an old, stale ticket) then we will tolerate it and skip over
3079 * it.
3080 */
3081 ret->recv_max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
3082
3083 /* By default we send two session tickets automatically in TLSv1.3 */
3084 ret->num_tickets = 2;
3085
3086 ssl_ctx_system_config(ret);
3087
3088 return ret;
3089 err:
3090 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
3091 err2:
3092 SSL_CTX_free(ret);
3093 return NULL;
3094 }
3095
SSL_CTX_up_ref(SSL_CTX * ctx)3096 int SSL_CTX_up_ref(SSL_CTX *ctx)
3097 {
3098 int i;
3099
3100 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
3101 return 0;
3102
3103 REF_PRINT_COUNT("SSL_CTX", ctx);
3104 REF_ASSERT_ISNT(i < 2);
3105 return ((i > 1) ? 1 : 0);
3106 }
3107
SSL_CTX_free(SSL_CTX * a)3108 void SSL_CTX_free(SSL_CTX *a)
3109 {
3110 int i;
3111
3112 if (a == NULL)
3113 return;
3114
3115 CRYPTO_DOWN_REF(&a->references, &i, a->lock);
3116 REF_PRINT_COUNT("SSL_CTX", a);
3117 if (i > 0)
3118 return;
3119 REF_ASSERT_ISNT(i < 0);
3120
3121 X509_VERIFY_PARAM_free(a->param);
3122 dane_ctx_final(&a->dane);
3123
3124 /*
3125 * Free internal session cache. However: the remove_cb() may reference
3126 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
3127 * after the sessions were flushed.
3128 * As the ex_data handling routines might also touch the session cache,
3129 * the most secure solution seems to be: empty (flush) the cache, then
3130 * free ex_data, then finally free the cache.
3131 * (See ticket [openssl.org #212].)
3132 */
3133 if (a->sessions != NULL)
3134 SSL_CTX_flush_sessions(a, 0);
3135
3136 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
3137 lh_SSL_SESSION_free(a->sessions);
3138 X509_STORE_free(a->cert_store);
3139 #ifndef OPENSSL_NO_CT
3140 CTLOG_STORE_free(a->ctlog_store);
3141 #endif
3142 sk_SSL_CIPHER_free(a->cipher_list);
3143 sk_SSL_CIPHER_free(a->cipher_list_by_id);
3144 sk_SSL_CIPHER_free(a->tls13_ciphersuites);
3145 ssl_cert_free(a->cert);
3146 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free);
3147 sk_X509_NAME_pop_free(a->client_ca_names, X509_NAME_free);
3148 sk_X509_pop_free(a->extra_certs, X509_free);
3149 a->comp_methods = NULL;
3150 #ifndef OPENSSL_NO_SRTP
3151 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
3152 #endif
3153 #ifndef OPENSSL_NO_SRP
3154 SSL_CTX_SRP_CTX_free(a);
3155 #endif
3156 #ifndef OPENSSL_NO_ENGINE
3157 ENGINE_finish(a->client_cert_engine);
3158 #endif
3159
3160 #ifndef OPENSSL_NO_EC
3161 OPENSSL_free(a->ext.ecpointformats);
3162 OPENSSL_free(a->ext.supportedgroups);
3163 #endif
3164 OPENSSL_free(a->ext.alpn);
3165 OPENSSL_secure_free(a->ext.secure);
3166
3167 CRYPTO_THREAD_lock_free(a->lock);
3168
3169 OPENSSL_free(a);
3170 }
3171
SSL_CTX_set_default_passwd_cb(SSL_CTX * ctx,pem_password_cb * cb)3172 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
3173 {
3174 ctx->default_passwd_callback = cb;
3175 }
3176
SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX * ctx,void * u)3177 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
3178 {
3179 ctx->default_passwd_callback_userdata = u;
3180 }
3181
SSL_CTX_get_default_passwd_cb(SSL_CTX * ctx)3182 pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
3183 {
3184 return ctx->default_passwd_callback;
3185 }
3186
SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX * ctx)3187 void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
3188 {
3189 return ctx->default_passwd_callback_userdata;
3190 }
3191
SSL_set_default_passwd_cb(SSL * s,pem_password_cb * cb)3192 void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
3193 {
3194 s->default_passwd_callback = cb;
3195 }
3196
SSL_set_default_passwd_cb_userdata(SSL * s,void * u)3197 void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
3198 {
3199 s->default_passwd_callback_userdata = u;
3200 }
3201
SSL_get_default_passwd_cb(SSL * s)3202 pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
3203 {
3204 return s->default_passwd_callback;
3205 }
3206
SSL_get_default_passwd_cb_userdata(SSL * s)3207 void *SSL_get_default_passwd_cb_userdata(SSL *s)
3208 {
3209 return s->default_passwd_callback_userdata;
3210 }
3211
SSL_CTX_set_cert_verify_callback(SSL_CTX * ctx,int (* cb)(X509_STORE_CTX *,void *),void * arg)3212 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
3213 int (*cb) (X509_STORE_CTX *, void *),
3214 void *arg)
3215 {
3216 ctx->app_verify_callback = cb;
3217 ctx->app_verify_arg = arg;
3218 }
3219
SSL_CTX_set_verify(SSL_CTX * ctx,int mode,int (* cb)(int,X509_STORE_CTX *))3220 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
3221 int (*cb) (int, X509_STORE_CTX *))
3222 {
3223 ctx->verify_mode = mode;
3224 ctx->default_verify_callback = cb;
3225 }
3226
SSL_CTX_set_verify_depth(SSL_CTX * ctx,int depth)3227 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
3228 {
3229 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
3230 }
3231
SSL_CTX_set_cert_cb(SSL_CTX * c,int (* cb)(SSL * ssl,void * arg),void * arg)3232 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
3233 {
3234 ssl_cert_set_cert_cb(c->cert, cb, arg);
3235 }
3236
SSL_set_cert_cb(SSL * s,int (* cb)(SSL * ssl,void * arg),void * arg)3237 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
3238 {
3239 ssl_cert_set_cert_cb(s->cert, cb, arg);
3240 }
3241
ssl_set_masks(SSL * s)3242 void ssl_set_masks(SSL *s)
3243 {
3244 CERT *c = s->cert;
3245 uint32_t *pvalid = s->s3->tmp.valid_flags;
3246 int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
3247 unsigned long mask_k, mask_a;
3248 #ifndef OPENSSL_NO_EC
3249 int have_ecc_cert, ecdsa_ok;
3250 #endif
3251 if (c == NULL)
3252 return;
3253
3254 #ifndef OPENSSL_NO_DH
3255 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
3256 #else
3257 dh_tmp = 0;
3258 #endif
3259
3260 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3261 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3262 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
3263 #ifndef OPENSSL_NO_EC
3264 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
3265 #endif
3266 mask_k = 0;
3267 mask_a = 0;
3268
3269 #ifdef CIPHER_DEBUG
3270 fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n",
3271 dh_tmp, rsa_enc, rsa_sign, dsa_sign);
3272 #endif
3273
3274 #ifndef OPENSSL_NO_GOST
3275 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
3276 mask_k |= SSL_kGOST;
3277 mask_a |= SSL_aGOST12;
3278 }
3279 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
3280 mask_k |= SSL_kGOST;
3281 mask_a |= SSL_aGOST12;
3282 }
3283 if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
3284 mask_k |= SSL_kGOST;
3285 mask_a |= SSL_aGOST01;
3286 }
3287 #endif
3288
3289 if (rsa_enc)
3290 mask_k |= SSL_kRSA;
3291
3292 if (dh_tmp)
3293 mask_k |= SSL_kDHE;
3294
3295 /*
3296 * If we only have an RSA-PSS certificate allow RSA authentication
3297 * if TLS 1.2 and peer supports it.
3298 */
3299
3300 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN)
3301 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN
3302 && TLS1_get_version(s) == TLS1_2_VERSION))
3303 mask_a |= SSL_aRSA;
3304
3305 if (dsa_sign) {
3306 mask_a |= SSL_aDSS;
3307 }
3308
3309 mask_a |= SSL_aNULL;
3310
3311 /*
3312 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
3313 * depending on the key usage extension.
3314 */
3315 #ifndef OPENSSL_NO_EC
3316 if (have_ecc_cert) {
3317 uint32_t ex_kusage;
3318 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
3319 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
3320 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
3321 ecdsa_ok = 0;
3322 if (ecdsa_ok)
3323 mask_a |= SSL_aECDSA;
3324 }
3325 /* Allow Ed25519 for TLS 1.2 if peer supports it */
3326 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519)
3327 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
3328 && TLS1_get_version(s) == TLS1_2_VERSION)
3329 mask_a |= SSL_aECDSA;
3330
3331 /* Allow Ed448 for TLS 1.2 if peer supports it */
3332 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448)
3333 && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN
3334 && TLS1_get_version(s) == TLS1_2_VERSION)
3335 mask_a |= SSL_aECDSA;
3336 #endif
3337
3338 #ifndef OPENSSL_NO_EC
3339 mask_k |= SSL_kECDHE;
3340 #endif
3341
3342 #ifndef OPENSSL_NO_PSK
3343 mask_k |= SSL_kPSK;
3344 mask_a |= SSL_aPSK;
3345 if (mask_k & SSL_kRSA)
3346 mask_k |= SSL_kRSAPSK;
3347 if (mask_k & SSL_kDHE)
3348 mask_k |= SSL_kDHEPSK;
3349 if (mask_k & SSL_kECDHE)
3350 mask_k |= SSL_kECDHEPSK;
3351 #endif
3352
3353 s->s3->tmp.mask_k = mask_k;
3354 s->s3->tmp.mask_a = mask_a;
3355 }
3356
3357 #ifndef OPENSSL_NO_EC
3358
ssl_check_srvr_ecc_cert_and_alg(X509 * x,SSL * s)3359 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
3360 {
3361 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
3362 /* key usage, if present, must allow signing */
3363 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
3364 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
3365 SSL_R_ECC_CERT_NOT_FOR_SIGNING);
3366 return 0;
3367 }
3368 }
3369 return 1; /* all checks are ok */
3370 }
3371
3372 #endif
3373
ssl_get_server_cert_serverinfo(SSL * s,const unsigned char ** serverinfo,size_t * serverinfo_length)3374 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
3375 size_t *serverinfo_length)
3376 {
3377 CERT_PKEY *cpk = s->s3->tmp.cert;
3378 *serverinfo_length = 0;
3379
3380 if (cpk == NULL || cpk->serverinfo == NULL)
3381 return 0;
3382
3383 *serverinfo = cpk->serverinfo;
3384 *serverinfo_length = cpk->serverinfo_length;
3385 return 1;
3386 }
3387
ssl_update_cache(SSL * s,int mode)3388 void ssl_update_cache(SSL *s, int mode)
3389 {
3390 int i;
3391
3392 /*
3393 * If the session_id_length is 0, we are not supposed to cache it, and it
3394 * would be rather hard to do anyway :-)
3395 */
3396 if (s->session->session_id_length == 0)
3397 return;
3398
3399 /*
3400 * If sid_ctx_length is 0 there is no specific application context
3401 * associated with this session, so when we try to resume it and
3402 * SSL_VERIFY_PEER is requested to verify the client identity, we have no
3403 * indication that this is actually a session for the proper application
3404 * context, and the *handshake* will fail, not just the resumption attempt.
3405 * Do not cache (on the server) these sessions that are not resumable
3406 * (clients can set SSL_VERIFY_PEER without needing a sid_ctx set).
3407 */
3408 if (s->server && s->session->sid_ctx_length == 0
3409 && (s->verify_mode & SSL_VERIFY_PEER) != 0)
3410 return;
3411
3412 i = s->session_ctx->session_cache_mode;
3413 if ((i & mode) != 0
3414 && (!s->hit || SSL_IS_TLS13(s))) {
3415 /*
3416 * Add the session to the internal cache. In server side TLSv1.3 we
3417 * normally don't do this because by default it's a full stateless ticket
3418 * with only a dummy session id so there is no reason to cache it,
3419 * unless:
3420 * - we are doing early_data, in which case we cache so that we can
3421 * detect replays
3422 * - the application has set a remove_session_cb so needs to know about
3423 * session timeout events
3424 * - SSL_OP_NO_TICKET is set in which case it is a stateful ticket
3425 */
3426 if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0
3427 && (!SSL_IS_TLS13(s)
3428 || !s->server
3429 || (s->max_early_data > 0
3430 && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)
3431 || s->session_ctx->remove_session_cb != NULL
3432 || (s->options & SSL_OP_NO_TICKET) != 0))
3433 SSL_CTX_add_session(s->session_ctx, s->session);
3434
3435 /*
3436 * Add the session to the external cache. We do this even in server side
3437 * TLSv1.3 without early data because some applications just want to
3438 * know about the creation of a session and aren't doing a full cache.
3439 */
3440 if (s->session_ctx->new_session_cb != NULL) {
3441 SSL_SESSION_up_ref(s->session);
3442 if (!s->session_ctx->new_session_cb(s, s->session))
3443 SSL_SESSION_free(s->session);
3444 }
3445 }
3446
3447 /* auto flush every 255 connections */
3448 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
3449 TSAN_QUALIFIER int *stat;
3450 if (mode & SSL_SESS_CACHE_CLIENT)
3451 stat = &s->session_ctx->stats.sess_connect_good;
3452 else
3453 stat = &s->session_ctx->stats.sess_accept_good;
3454 if ((tsan_load(stat) & 0xff) == 0xff)
3455 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
3456 }
3457 }
3458
SSL_CTX_get_ssl_method(const SSL_CTX * ctx)3459 const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx)
3460 {
3461 return ctx->method;
3462 }
3463
SSL_get_ssl_method(const SSL * s)3464 const SSL_METHOD *SSL_get_ssl_method(const SSL *s)
3465 {
3466 return s->method;
3467 }
3468
SSL_set_ssl_method(SSL * s,const SSL_METHOD * meth)3469 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
3470 {
3471 int ret = 1;
3472
3473 if (s->method != meth) {
3474 const SSL_METHOD *sm = s->method;
3475 int (*hf) (SSL *) = s->handshake_func;
3476
3477 if (sm->version == meth->version)
3478 s->method = meth;
3479 else {
3480 sm->ssl_free(s);
3481 s->method = meth;
3482 ret = s->method->ssl_new(s);
3483 }
3484
3485 if (hf == sm->ssl_connect)
3486 s->handshake_func = meth->ssl_connect;
3487 else if (hf == sm->ssl_accept)
3488 s->handshake_func = meth->ssl_accept;
3489 }
3490 return ret;
3491 }
3492
SSL_get_error(const SSL * s,int i)3493 int SSL_get_error(const SSL *s, int i)
3494 {
3495 int reason;
3496 unsigned long l;
3497 BIO *bio;
3498
3499 if (i > 0)
3500 return SSL_ERROR_NONE;
3501
3502 /*
3503 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
3504 * where we do encode the error
3505 */
3506 if ((l = ERR_peek_error()) != 0) {
3507 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
3508 return SSL_ERROR_SYSCALL;
3509 else
3510 return SSL_ERROR_SSL;
3511 }
3512
3513 if (SSL_want_read(s)) {
3514 bio = SSL_get_rbio(s);
3515 if (BIO_should_read(bio))
3516 return SSL_ERROR_WANT_READ;
3517 else if (BIO_should_write(bio))
3518 /*
3519 * This one doesn't make too much sense ... We never try to write
3520 * to the rbio, and an application program where rbio and wbio
3521 * are separate couldn't even know what it should wait for.
3522 * However if we ever set s->rwstate incorrectly (so that we have
3523 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
3524 * wbio *are* the same, this test works around that bug; so it
3525 * might be safer to keep it.
3526 */
3527 return SSL_ERROR_WANT_WRITE;
3528 else if (BIO_should_io_special(bio)) {
3529 reason = BIO_get_retry_reason(bio);
3530 if (reason == BIO_RR_CONNECT)
3531 return SSL_ERROR_WANT_CONNECT;
3532 else if (reason == BIO_RR_ACCEPT)
3533 return SSL_ERROR_WANT_ACCEPT;
3534 else
3535 return SSL_ERROR_SYSCALL; /* unknown */
3536 }
3537 }
3538
3539 if (SSL_want_write(s)) {
3540 /* Access wbio directly - in order to use the buffered bio if present */
3541 bio = s->wbio;
3542 if (BIO_should_write(bio))
3543 return SSL_ERROR_WANT_WRITE;
3544 else if (BIO_should_read(bio))
3545 /*
3546 * See above (SSL_want_read(s) with BIO_should_write(bio))
3547 */
3548 return SSL_ERROR_WANT_READ;
3549 else if (BIO_should_io_special(bio)) {
3550 reason = BIO_get_retry_reason(bio);
3551 if (reason == BIO_RR_CONNECT)
3552 return SSL_ERROR_WANT_CONNECT;
3553 else if (reason == BIO_RR_ACCEPT)
3554 return SSL_ERROR_WANT_ACCEPT;
3555 else
3556 return SSL_ERROR_SYSCALL;
3557 }
3558 }
3559 if (SSL_want_x509_lookup(s))
3560 return SSL_ERROR_WANT_X509_LOOKUP;
3561 if (SSL_want_async(s))
3562 return SSL_ERROR_WANT_ASYNC;
3563 if (SSL_want_async_job(s))
3564 return SSL_ERROR_WANT_ASYNC_JOB;
3565 if (SSL_want_client_hello_cb(s))
3566 return SSL_ERROR_WANT_CLIENT_HELLO_CB;
3567
3568 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
3569 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
3570 return SSL_ERROR_ZERO_RETURN;
3571
3572 return SSL_ERROR_SYSCALL;
3573 }
3574
ssl_do_handshake_intern(void * vargs)3575 static int ssl_do_handshake_intern(void *vargs)
3576 {
3577 struct ssl_async_args *args;
3578 SSL *s;
3579
3580 args = (struct ssl_async_args *)vargs;
3581 s = args->s;
3582
3583 return s->handshake_func(s);
3584 }
3585
SSL_do_handshake(SSL * s)3586 int SSL_do_handshake(SSL *s)
3587 {
3588 int ret = 1;
3589
3590 if (s->handshake_func == NULL) {
3591 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET);
3592 return -1;
3593 }
3594
3595 ossl_statem_check_finish_init(s, -1);
3596
3597 s->method->ssl_renegotiate_check(s, 0);
3598
3599 if (SSL_in_init(s) || SSL_in_before(s)) {
3600 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
3601 struct ssl_async_args args;
3602
3603 args.s = s;
3604
3605 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
3606 } else {
3607 ret = s->handshake_func(s);
3608 }
3609 }
3610 return ret;
3611 }
3612
SSL_set_accept_state(SSL * s)3613 void SSL_set_accept_state(SSL *s)
3614 {
3615 s->server = 1;
3616 s->shutdown = 0;
3617 ossl_statem_clear(s);
3618 s->handshake_func = s->method->ssl_accept;
3619 clear_ciphers(s);
3620 }
3621
SSL_set_connect_state(SSL * s)3622 void SSL_set_connect_state(SSL *s)
3623 {
3624 s->server = 0;
3625 s->shutdown = 0;
3626 ossl_statem_clear(s);
3627 s->handshake_func = s->method->ssl_connect;
3628 clear_ciphers(s);
3629 }
3630
ssl_undefined_function(SSL * s)3631 int ssl_undefined_function(SSL *s)
3632 {
3633 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3634 return 0;
3635 }
3636
ssl_undefined_void_function(void)3637 int ssl_undefined_void_function(void)
3638 {
3639 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
3640 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3641 return 0;
3642 }
3643
ssl_undefined_const_function(const SSL * s)3644 int ssl_undefined_const_function(const SSL *s)
3645 {
3646 return 0;
3647 }
3648
ssl_bad_method(int ver)3649 const SSL_METHOD *ssl_bad_method(int ver)
3650 {
3651 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3652 return NULL;
3653 }
3654
ssl_protocol_to_string(int version)3655 const char *ssl_protocol_to_string(int version)
3656 {
3657 switch(version)
3658 {
3659 case TLS1_3_VERSION:
3660 return "TLSv1.3";
3661
3662 case TLS1_2_VERSION:
3663 return "TLSv1.2";
3664
3665 case TLS1_1_VERSION:
3666 return "TLSv1.1";
3667
3668 case TLS1_VERSION:
3669 return "TLSv1";
3670
3671 case SSL3_VERSION:
3672 return "SSLv3";
3673
3674 case DTLS1_BAD_VER:
3675 return "DTLSv0.9";
3676
3677 case DTLS1_VERSION:
3678 return "DTLSv1";
3679
3680 case DTLS1_2_VERSION:
3681 return "DTLSv1.2";
3682
3683 default:
3684 return "unknown";
3685 }
3686 }
3687
SSL_get_version(const SSL * s)3688 const char *SSL_get_version(const SSL *s)
3689 {
3690 return ssl_protocol_to_string(s->version);
3691 }
3692
dup_ca_names(STACK_OF (X509_NAME)** dst,STACK_OF (X509_NAME)* src)3693 static int dup_ca_names(STACK_OF(X509_NAME) **dst, STACK_OF(X509_NAME) *src)
3694 {
3695 STACK_OF(X509_NAME) *sk;
3696 X509_NAME *xn;
3697 int i;
3698
3699 if (src == NULL) {
3700 *dst = NULL;
3701 return 1;
3702 }
3703
3704 if ((sk = sk_X509_NAME_new_null()) == NULL)
3705 return 0;
3706 for (i = 0; i < sk_X509_NAME_num(src); i++) {
3707 xn = X509_NAME_dup(sk_X509_NAME_value(src, i));
3708 if (xn == NULL) {
3709 sk_X509_NAME_pop_free(sk, X509_NAME_free);
3710 return 0;
3711 }
3712 if (sk_X509_NAME_insert(sk, xn, i) == 0) {
3713 X509_NAME_free(xn);
3714 sk_X509_NAME_pop_free(sk, X509_NAME_free);
3715 return 0;
3716 }
3717 }
3718 *dst = sk;
3719
3720 return 1;
3721 }
3722
SSL_dup(SSL * s)3723 SSL *SSL_dup(SSL *s)
3724 {
3725 SSL *ret;
3726 int i;
3727
3728 /* If we're not quiescent, just up_ref! */
3729 if (!SSL_in_init(s) || !SSL_in_before(s)) {
3730 CRYPTO_UP_REF(&s->references, &i, s->lock);
3731 return s;
3732 }
3733
3734 /*
3735 * Otherwise, copy configuration state, and session if set.
3736 */
3737 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
3738 return NULL;
3739
3740 if (s->session != NULL) {
3741 /*
3742 * Arranges to share the same session via up_ref. This "copies"
3743 * session-id, SSL_METHOD, sid_ctx, and 'cert'
3744 */
3745 if (!SSL_copy_session_id(ret, s))
3746 goto err;
3747 } else {
3748 /*
3749 * No session has been established yet, so we have to expect that
3750 * s->cert or ret->cert will be changed later -- they should not both
3751 * point to the same object, and thus we can't use
3752 * SSL_copy_session_id.
3753 */
3754 if (!SSL_set_ssl_method(ret, s->method))
3755 goto err;
3756
3757 if (s->cert != NULL) {
3758 ssl_cert_free(ret->cert);
3759 ret->cert = ssl_cert_dup(s->cert);
3760 if (ret->cert == NULL)
3761 goto err;
3762 }
3763
3764 if (!SSL_set_session_id_context(ret, s->sid_ctx,
3765 (int)s->sid_ctx_length))
3766 goto err;
3767 }
3768
3769 if (!ssl_dane_dup(ret, s))
3770 goto err;
3771 ret->version = s->version;
3772 ret->options = s->options;
3773 ret->mode = s->mode;
3774 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
3775 SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
3776 ret->msg_callback = s->msg_callback;
3777 ret->msg_callback_arg = s->msg_callback_arg;
3778 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
3779 SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
3780 ret->generate_session_id = s->generate_session_id;
3781
3782 SSL_set_info_callback(ret, SSL_get_info_callback(s));
3783
3784 /* copy app data, a little dangerous perhaps */
3785 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
3786 goto err;
3787
3788 /* setup rbio, and wbio */
3789 if (s->rbio != NULL) {
3790 if (!BIO_dup_state(s->rbio, (char *)&ret->rbio))
3791 goto err;
3792 }
3793 if (s->wbio != NULL) {
3794 if (s->wbio != s->rbio) {
3795 if (!BIO_dup_state(s->wbio, (char *)&ret->wbio))
3796 goto err;
3797 } else {
3798 BIO_up_ref(ret->rbio);
3799 ret->wbio = ret->rbio;
3800 }
3801 }
3802
3803 ret->server = s->server;
3804 if (s->handshake_func) {
3805 if (s->server)
3806 SSL_set_accept_state(ret);
3807 else
3808 SSL_set_connect_state(ret);
3809 }
3810 ret->shutdown = s->shutdown;
3811 ret->hit = s->hit;
3812
3813 ret->default_passwd_callback = s->default_passwd_callback;
3814 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;
3815
3816 X509_VERIFY_PARAM_inherit(ret->param, s->param);
3817
3818 /* dup the cipher_list and cipher_list_by_id stacks */
3819 if (s->cipher_list != NULL) {
3820 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
3821 goto err;
3822 }
3823 if (s->cipher_list_by_id != NULL)
3824 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id))
3825 == NULL)
3826 goto err;
3827
3828 /* Dup the client_CA list */
3829 if (!dup_ca_names(&ret->ca_names, s->ca_names)
3830 || !dup_ca_names(&ret->client_ca_names, s->client_ca_names))
3831 goto err;
3832
3833 return ret;
3834
3835 err:
3836 SSL_free(ret);
3837 return NULL;
3838 }
3839
ssl_clear_cipher_ctx(SSL * s)3840 void ssl_clear_cipher_ctx(SSL *s)
3841 {
3842 if (s->enc_read_ctx != NULL) {
3843 EVP_CIPHER_CTX_free(s->enc_read_ctx);
3844 s->enc_read_ctx = NULL;
3845 }
3846 if (s->enc_write_ctx != NULL) {
3847 EVP_CIPHER_CTX_free(s->enc_write_ctx);
3848 s->enc_write_ctx = NULL;
3849 }
3850 #ifndef OPENSSL_NO_COMP
3851 COMP_CTX_free(s->expand);
3852 s->expand = NULL;
3853 COMP_CTX_free(s->compress);
3854 s->compress = NULL;
3855 #endif
3856 }
3857
SSL_get_certificate(const SSL * s)3858 X509 *SSL_get_certificate(const SSL *s)
3859 {
3860 if (s->cert != NULL)
3861 return s->cert->key->x509;
3862 else
3863 return NULL;
3864 }
3865
SSL_get_privatekey(const SSL * s)3866 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3867 {
3868 if (s->cert != NULL)
3869 return s->cert->key->privatekey;
3870 else
3871 return NULL;
3872 }
3873
SSL_CTX_get0_certificate(const SSL_CTX * ctx)3874 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3875 {
3876 if (ctx->cert != NULL)
3877 return ctx->cert->key->x509;
3878 else
3879 return NULL;
3880 }
3881
SSL_CTX_get0_privatekey(const SSL_CTX * ctx)3882 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3883 {
3884 if (ctx->cert != NULL)
3885 return ctx->cert->key->privatekey;
3886 else
3887 return NULL;
3888 }
3889
SSL_get_current_cipher(const SSL * s)3890 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3891 {
3892 if ((s->session != NULL) && (s->session->cipher != NULL))
3893 return s->session->cipher;
3894 return NULL;
3895 }
3896
SSL_get_pending_cipher(const SSL * s)3897 const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s)
3898 {
3899 return s->s3->tmp.new_cipher;
3900 }
3901
SSL_get_current_compression(const SSL * s)3902 const COMP_METHOD *SSL_get_current_compression(const SSL *s)
3903 {
3904 #ifndef OPENSSL_NO_COMP
3905 return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
3906 #else
3907 return NULL;
3908 #endif
3909 }
3910
SSL_get_current_expansion(const SSL * s)3911 const COMP_METHOD *SSL_get_current_expansion(const SSL *s)
3912 {
3913 #ifndef OPENSSL_NO_COMP
3914 return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
3915 #else
3916 return NULL;
3917 #endif
3918 }
3919
ssl_init_wbio_buffer(SSL * s)3920 int ssl_init_wbio_buffer(SSL *s)
3921 {
3922 BIO *bbio;
3923
3924 if (s->bbio != NULL) {
3925 /* Already buffered. */
3926 return 1;
3927 }
3928
3929 bbio = BIO_new(BIO_f_buffer());
3930 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) {
3931 BIO_free(bbio);
3932 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB);
3933 return 0;
3934 }
3935 s->bbio = bbio;
3936 s->wbio = BIO_push(bbio, s->wbio);
3937
3938 return 1;
3939 }
3940
ssl_free_wbio_buffer(SSL * s)3941 int ssl_free_wbio_buffer(SSL *s)
3942 {
3943 /* callers ensure s is never null */
3944 if (s->bbio == NULL)
3945 return 1;
3946
3947 s->wbio = BIO_pop(s->wbio);
3948 BIO_free(s->bbio);
3949 s->bbio = NULL;
3950
3951 return 1;
3952 }
3953
SSL_CTX_set_quiet_shutdown(SSL_CTX * ctx,int mode)3954 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
3955 {
3956 ctx->quiet_shutdown = mode;
3957 }
3958
SSL_CTX_get_quiet_shutdown(const SSL_CTX * ctx)3959 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3960 {
3961 return ctx->quiet_shutdown;
3962 }
3963
SSL_set_quiet_shutdown(SSL * s,int mode)3964 void SSL_set_quiet_shutdown(SSL *s, int mode)
3965 {
3966 s->quiet_shutdown = mode;
3967 }
3968
SSL_get_quiet_shutdown(const SSL * s)3969 int SSL_get_quiet_shutdown(const SSL *s)
3970 {
3971 return s->quiet_shutdown;
3972 }
3973
SSL_set_shutdown(SSL * s,int mode)3974 void SSL_set_shutdown(SSL *s, int mode)
3975 {
3976 s->shutdown = mode;
3977 }
3978
SSL_get_shutdown(const SSL * s)3979 int SSL_get_shutdown(const SSL *s)
3980 {
3981 return s->shutdown;
3982 }
3983
SSL_version(const SSL * s)3984 int SSL_version(const SSL *s)
3985 {
3986 return s->version;
3987 }
3988
SSL_client_version(const SSL * s)3989 int SSL_client_version(const SSL *s)
3990 {
3991 return s->client_version;
3992 }
3993
SSL_get_SSL_CTX(const SSL * ssl)3994 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3995 {
3996 return ssl->ctx;
3997 }
3998
SSL_set_SSL_CTX(SSL * ssl,SSL_CTX * ctx)3999 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
4000 {
4001 CERT *new_cert;
4002 if (ssl->ctx == ctx)
4003 return ssl->ctx;
4004 if (ctx == NULL)
4005 ctx = ssl->session_ctx;
4006 new_cert = ssl_cert_dup(ctx->cert);
4007 if (new_cert == NULL) {
4008 return NULL;
4009 }
4010
4011 if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) {
4012 ssl_cert_free(new_cert);
4013 return NULL;
4014 }
4015
4016 ssl_cert_free(ssl->cert);
4017 ssl->cert = new_cert;
4018
4019 /*
4020 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
4021 * so setter APIs must prevent invalid lengths from entering the system.
4022 */
4023 if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)))
4024 return NULL;
4025
4026 /*
4027 * If the session ID context matches that of the parent SSL_CTX,
4028 * inherit it from the new SSL_CTX as well. If however the context does
4029 * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
4030 * leave it unchanged.
4031 */
4032 if ((ssl->ctx != NULL) &&
4033 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
4034 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) {
4035 ssl->sid_ctx_length = ctx->sid_ctx_length;
4036 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
4037 }
4038
4039 SSL_CTX_up_ref(ctx);
4040 SSL_CTX_free(ssl->ctx); /* decrement reference count */
4041 ssl->ctx = ctx;
4042
4043 return ssl->ctx;
4044 }
4045
SSL_CTX_set_default_verify_paths(SSL_CTX * ctx)4046 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
4047 {
4048 return X509_STORE_set_default_paths(ctx->cert_store);
4049 }
4050
SSL_CTX_set_default_verify_dir(SSL_CTX * ctx)4051 int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
4052 {
4053 X509_LOOKUP *lookup;
4054
4055 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
4056 if (lookup == NULL)
4057 return 0;
4058 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
4059
4060 /* Clear any errors if the default directory does not exist */
4061 ERR_clear_error();
4062
4063 return 1;
4064 }
4065
SSL_CTX_set_default_verify_file(SSL_CTX * ctx)4066 int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
4067 {
4068 X509_LOOKUP *lookup;
4069
4070 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
4071 if (lookup == NULL)
4072 return 0;
4073
4074 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
4075
4076 /* Clear any errors if the default file does not exist */
4077 ERR_clear_error();
4078
4079 return 1;
4080 }
4081
SSL_CTX_load_verify_locations(SSL_CTX * ctx,const char * CAfile,const char * CApath)4082 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
4083 const char *CApath)
4084 {
4085 return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath);
4086 }
4087
SSL_set_info_callback(SSL * ssl,void (* cb)(const SSL * ssl,int type,int val))4088 void SSL_set_info_callback(SSL *ssl,
4089 void (*cb) (const SSL *ssl, int type, int val))
4090 {
4091 ssl->info_callback = cb;
4092 }
4093
4094 /*
4095 * One compiler (Diab DCC) doesn't like argument names in returned function
4096 * pointer.
4097 */
SSL_get_info_callback(const SSL * ssl)4098 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
4099 int /* type */ ,
4100 int /* val */ ) {
4101 return ssl->info_callback;
4102 }
4103
SSL_set_verify_result(SSL * ssl,long arg)4104 void SSL_set_verify_result(SSL *ssl, long arg)
4105 {
4106 ssl->verify_result = arg;
4107 }
4108
SSL_get_verify_result(const SSL * ssl)4109 long SSL_get_verify_result(const SSL *ssl)
4110 {
4111 return ssl->verify_result;
4112 }
4113
SSL_get_client_random(const SSL * ssl,unsigned char * out,size_t outlen)4114 size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
4115 {
4116 if (outlen == 0)
4117 return sizeof(ssl->s3->client_random);
4118 if (outlen > sizeof(ssl->s3->client_random))
4119 outlen = sizeof(ssl->s3->client_random);
4120 memcpy(out, ssl->s3->client_random, outlen);
4121 return outlen;
4122 }
4123
SSL_get_server_random(const SSL * ssl,unsigned char * out,size_t outlen)4124 size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
4125 {
4126 if (outlen == 0)
4127 return sizeof(ssl->s3->server_random);
4128 if (outlen > sizeof(ssl->s3->server_random))
4129 outlen = sizeof(ssl->s3->server_random);
4130 memcpy(out, ssl->s3->server_random, outlen);
4131 return outlen;
4132 }
4133
SSL_SESSION_get_master_key(const SSL_SESSION * session,unsigned char * out,size_t outlen)4134 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
4135 unsigned char *out, size_t outlen)
4136 {
4137 if (outlen == 0)
4138 return session->master_key_length;
4139 if (outlen > session->master_key_length)
4140 outlen = session->master_key_length;
4141 memcpy(out, session->master_key, outlen);
4142 return outlen;
4143 }
4144
SSL_SESSION_set1_master_key(SSL_SESSION * sess,const unsigned char * in,size_t len)4145 int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in,
4146 size_t len)
4147 {
4148 if (len > sizeof(sess->master_key))
4149 return 0;
4150
4151 memcpy(sess->master_key, in, len);
4152 sess->master_key_length = len;
4153 return 1;
4154 }
4155
4156
SSL_set_ex_data(SSL * s,int idx,void * arg)4157 int SSL_set_ex_data(SSL *s, int idx, void *arg)
4158 {
4159 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4160 }
4161
SSL_get_ex_data(const SSL * s,int idx)4162 void *SSL_get_ex_data(const SSL *s, int idx)
4163 {
4164 return CRYPTO_get_ex_data(&s->ex_data, idx);
4165 }
4166
SSL_CTX_set_ex_data(SSL_CTX * s,int idx,void * arg)4167 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
4168 {
4169 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4170 }
4171
SSL_CTX_get_ex_data(const SSL_CTX * s,int idx)4172 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
4173 {
4174 return CRYPTO_get_ex_data(&s->ex_data, idx);
4175 }
4176
SSL_CTX_get_cert_store(const SSL_CTX * ctx)4177 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
4178 {
4179 return ctx->cert_store;
4180 }
4181
SSL_CTX_set_cert_store(SSL_CTX * ctx,X509_STORE * store)4182 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
4183 {
4184 X509_STORE_free(ctx->cert_store);
4185 ctx->cert_store = store;
4186 }
4187
SSL_CTX_set1_cert_store(SSL_CTX * ctx,X509_STORE * store)4188 void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
4189 {
4190 if (store != NULL)
4191 X509_STORE_up_ref(store);
4192 SSL_CTX_set_cert_store(ctx, store);
4193 }
4194
SSL_want(const SSL * s)4195 int SSL_want(const SSL *s)
4196 {
4197 return s->rwstate;
4198 }
4199
4200 /**
4201 * \brief Set the callback for generating temporary DH keys.
4202 * \param ctx the SSL context.
4203 * \param dh the callback
4204 */
4205
4206 #ifndef OPENSSL_NO_DH
SSL_CTX_set_tmp_dh_callback(SSL_CTX * ctx,DH * (* dh)(SSL * ssl,int is_export,int keylength))4207 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
4208 DH *(*dh) (SSL *ssl, int is_export,
4209 int keylength))
4210 {
4211 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4212 }
4213
SSL_set_tmp_dh_callback(SSL * ssl,DH * (* dh)(SSL * ssl,int is_export,int keylength))4214 void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export,
4215 int keylength))
4216 {
4217 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4218 }
4219 #endif
4220
4221 #ifndef OPENSSL_NO_PSK
SSL_CTX_use_psk_identity_hint(SSL_CTX * ctx,const char * identity_hint)4222 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
4223 {
4224 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4225 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4226 return 0;
4227 }
4228 OPENSSL_free(ctx->cert->psk_identity_hint);
4229 if (identity_hint != NULL) {
4230 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4231 if (ctx->cert->psk_identity_hint == NULL)
4232 return 0;
4233 } else
4234 ctx->cert->psk_identity_hint = NULL;
4235 return 1;
4236 }
4237
SSL_use_psk_identity_hint(SSL * s,const char * identity_hint)4238 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
4239 {
4240 if (s == NULL)
4241 return 0;
4242
4243 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4244 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4245 return 0;
4246 }
4247 OPENSSL_free(s->cert->psk_identity_hint);
4248 if (identity_hint != NULL) {
4249 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4250 if (s->cert->psk_identity_hint == NULL)
4251 return 0;
4252 } else
4253 s->cert->psk_identity_hint = NULL;
4254 return 1;
4255 }
4256
SSL_get_psk_identity_hint(const SSL * s)4257 const char *SSL_get_psk_identity_hint(const SSL *s)
4258 {
4259 if (s == NULL || s->session == NULL)
4260 return NULL;
4261 return s->session->psk_identity_hint;
4262 }
4263
SSL_get_psk_identity(const SSL * s)4264 const char *SSL_get_psk_identity(const SSL *s)
4265 {
4266 if (s == NULL || s->session == NULL)
4267 return NULL;
4268 return s->session->psk_identity;
4269 }
4270
SSL_set_psk_client_callback(SSL * s,SSL_psk_client_cb_func cb)4271 void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
4272 {
4273 s->psk_client_callback = cb;
4274 }
4275
SSL_CTX_set_psk_client_callback(SSL_CTX * ctx,SSL_psk_client_cb_func cb)4276 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
4277 {
4278 ctx->psk_client_callback = cb;
4279 }
4280
SSL_set_psk_server_callback(SSL * s,SSL_psk_server_cb_func cb)4281 void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
4282 {
4283 s->psk_server_callback = cb;
4284 }
4285
SSL_CTX_set_psk_server_callback(SSL_CTX * ctx,SSL_psk_server_cb_func cb)4286 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
4287 {
4288 ctx->psk_server_callback = cb;
4289 }
4290 #endif
4291
SSL_set_psk_find_session_callback(SSL * s,SSL_psk_find_session_cb_func cb)4292 void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb)
4293 {
4294 s->psk_find_session_cb = cb;
4295 }
4296
SSL_CTX_set_psk_find_session_callback(SSL_CTX * ctx,SSL_psk_find_session_cb_func cb)4297 void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
4298 SSL_psk_find_session_cb_func cb)
4299 {
4300 ctx->psk_find_session_cb = cb;
4301 }
4302
SSL_set_psk_use_session_callback(SSL * s,SSL_psk_use_session_cb_func cb)4303 void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
4304 {
4305 s->psk_use_session_cb = cb;
4306 }
4307
SSL_CTX_set_psk_use_session_callback(SSL_CTX * ctx,SSL_psk_use_session_cb_func cb)4308 void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx,
4309 SSL_psk_use_session_cb_func cb)
4310 {
4311 ctx->psk_use_session_cb = cb;
4312 }
4313
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))4314 void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
4315 void (*cb) (int write_p, int version,
4316 int content_type, const void *buf,
4317 size_t len, SSL *ssl, void *arg))
4318 {
4319 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4320 }
4321
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))4322 void SSL_set_msg_callback(SSL *ssl,
4323 void (*cb) (int write_p, int version,
4324 int content_type, const void *buf,
4325 size_t len, SSL *ssl, void *arg))
4326 {
4327 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4328 }
4329
SSL_CTX_set_not_resumable_session_callback(SSL_CTX * ctx,int (* cb)(SSL * ssl,int is_forward_secure))4330 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
4331 int (*cb) (SSL *ssl,
4332 int
4333 is_forward_secure))
4334 {
4335 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4336 (void (*)(void))cb);
4337 }
4338
SSL_set_not_resumable_session_callback(SSL * ssl,int (* cb)(SSL * ssl,int is_forward_secure))4339 void SSL_set_not_resumable_session_callback(SSL *ssl,
4340 int (*cb) (SSL *ssl,
4341 int is_forward_secure))
4342 {
4343 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4344 (void (*)(void))cb);
4345 }
4346
SSL_CTX_set_record_padding_callback(SSL_CTX * ctx,size_t (* cb)(SSL * ssl,int type,size_t len,void * arg))4347 void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx,
4348 size_t (*cb) (SSL *ssl, int type,
4349 size_t len, void *arg))
4350 {
4351 ctx->record_padding_cb = cb;
4352 }
4353
SSL_CTX_set_record_padding_callback_arg(SSL_CTX * ctx,void * arg)4354 void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg)
4355 {
4356 ctx->record_padding_arg = arg;
4357 }
4358
SSL_CTX_get_record_padding_callback_arg(const SSL_CTX * ctx)4359 void *SSL_CTX_get_record_padding_callback_arg(const SSL_CTX *ctx)
4360 {
4361 return ctx->record_padding_arg;
4362 }
4363
SSL_CTX_set_block_padding(SSL_CTX * ctx,size_t block_size)4364 int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size)
4365 {
4366 /* block size of 0 or 1 is basically no padding */
4367 if (block_size == 1)
4368 ctx->block_padding = 0;
4369 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4370 ctx->block_padding = block_size;
4371 else
4372 return 0;
4373 return 1;
4374 }
4375
SSL_set_record_padding_callback(SSL * ssl,size_t (* cb)(SSL * ssl,int type,size_t len,void * arg))4376 void SSL_set_record_padding_callback(SSL *ssl,
4377 size_t (*cb) (SSL *ssl, int type,
4378 size_t len, void *arg))
4379 {
4380 ssl->record_padding_cb = cb;
4381 }
4382
SSL_set_record_padding_callback_arg(SSL * ssl,void * arg)4383 void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg)
4384 {
4385 ssl->record_padding_arg = arg;
4386 }
4387
SSL_get_record_padding_callback_arg(const SSL * ssl)4388 void *SSL_get_record_padding_callback_arg(const SSL *ssl)
4389 {
4390 return ssl->record_padding_arg;
4391 }
4392
SSL_set_block_padding(SSL * ssl,size_t block_size)4393 int SSL_set_block_padding(SSL *ssl, size_t block_size)
4394 {
4395 /* block size of 0 or 1 is basically no padding */
4396 if (block_size == 1)
4397 ssl->block_padding = 0;
4398 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4399 ssl->block_padding = block_size;
4400 else
4401 return 0;
4402 return 1;
4403 }
4404
SSL_set_num_tickets(SSL * s,size_t num_tickets)4405 int SSL_set_num_tickets(SSL *s, size_t num_tickets)
4406 {
4407 s->num_tickets = num_tickets;
4408
4409 return 1;
4410 }
4411
SSL_get_num_tickets(const SSL * s)4412 size_t SSL_get_num_tickets(const SSL *s)
4413 {
4414 return s->num_tickets;
4415 }
4416
SSL_CTX_set_num_tickets(SSL_CTX * ctx,size_t num_tickets)4417 int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets)
4418 {
4419 ctx->num_tickets = num_tickets;
4420
4421 return 1;
4422 }
4423
SSL_CTX_get_num_tickets(const SSL_CTX * ctx)4424 size_t SSL_CTX_get_num_tickets(const SSL_CTX *ctx)
4425 {
4426 return ctx->num_tickets;
4427 }
4428
4429 /*
4430 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
4431 * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
4432 * If EVP_MD pointer is passed, initializes ctx with this |md|.
4433 * Returns the newly allocated ctx;
4434 */
4435
ssl_replace_hash(EVP_MD_CTX ** hash,const EVP_MD * md)4436 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
4437 {
4438 ssl_clear_hash_ctx(hash);
4439 *hash = EVP_MD_CTX_new();
4440 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
4441 EVP_MD_CTX_free(*hash);
4442 *hash = NULL;
4443 return NULL;
4444 }
4445 return *hash;
4446 }
4447
ssl_clear_hash_ctx(EVP_MD_CTX ** hash)4448 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
4449 {
4450
4451 EVP_MD_CTX_free(*hash);
4452 *hash = NULL;
4453 }
4454
4455 /* Retrieve handshake hashes */
ssl_handshake_hash(SSL * s,unsigned char * out,size_t outlen,size_t * hashlen)4456 int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
4457 size_t *hashlen)
4458 {
4459 EVP_MD_CTX *ctx = NULL;
4460 EVP_MD_CTX *hdgst = s->s3->handshake_dgst;
4461 int hashleni = EVP_MD_CTX_size(hdgst);
4462 int ret = 0;
4463
4464 if (hashleni < 0 || (size_t)hashleni > outlen) {
4465 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4466 ERR_R_INTERNAL_ERROR);
4467 goto err;
4468 }
4469
4470 ctx = EVP_MD_CTX_new();
4471 if (ctx == NULL)
4472 goto err;
4473
4474 if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
4475 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) {
4476 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4477 ERR_R_INTERNAL_ERROR);
4478 goto err;
4479 }
4480
4481 *hashlen = hashleni;
4482
4483 ret = 1;
4484 err:
4485 EVP_MD_CTX_free(ctx);
4486 return ret;
4487 }
4488
SSL_session_reused(const SSL * s)4489 int SSL_session_reused(const SSL *s)
4490 {
4491 return s->hit;
4492 }
4493
SSL_is_server(const SSL * s)4494 int SSL_is_server(const SSL *s)
4495 {
4496 return s->server;
4497 }
4498
4499 #if OPENSSL_API_COMPAT < 0x10100000L
SSL_set_debug(SSL * s,int debug)4500 void SSL_set_debug(SSL *s, int debug)
4501 {
4502 /* Old function was do-nothing anyway... */
4503 (void)s;
4504 (void)debug;
4505 }
4506 #endif
4507
SSL_set_security_level(SSL * s,int level)4508 void SSL_set_security_level(SSL *s, int level)
4509 {
4510 s->cert->sec_level = level;
4511 }
4512
SSL_get_security_level(const SSL * s)4513 int SSL_get_security_level(const SSL *s)
4514 {
4515 return s->cert->sec_level;
4516 }
4517
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))4518 void SSL_set_security_callback(SSL *s,
4519 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4520 int op, int bits, int nid,
4521 void *other, void *ex))
4522 {
4523 s->cert->sec_cb = cb;
4524 }
4525
SSL_get_security_callback(const SSL * s)4526 int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
4527 const SSL_CTX *ctx, int op,
4528 int bits, int nid, void *other,
4529 void *ex) {
4530 return s->cert->sec_cb;
4531 }
4532
SSL_set0_security_ex_data(SSL * s,void * ex)4533 void SSL_set0_security_ex_data(SSL *s, void *ex)
4534 {
4535 s->cert->sec_ex = ex;
4536 }
4537
SSL_get0_security_ex_data(const SSL * s)4538 void *SSL_get0_security_ex_data(const SSL *s)
4539 {
4540 return s->cert->sec_ex;
4541 }
4542
SSL_CTX_set_security_level(SSL_CTX * ctx,int level)4543 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
4544 {
4545 ctx->cert->sec_level = level;
4546 }
4547
SSL_CTX_get_security_level(const SSL_CTX * ctx)4548 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
4549 {
4550 return ctx->cert->sec_level;
4551 }
4552
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))4553 void SSL_CTX_set_security_callback(SSL_CTX *ctx,
4554 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4555 int op, int bits, int nid,
4556 void *other, void *ex))
4557 {
4558 ctx->cert->sec_cb = cb;
4559 }
4560
SSL_CTX_get_security_callback(const SSL_CTX * ctx)4561 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
4562 const SSL_CTX *ctx,
4563 int op, int bits,
4564 int nid,
4565 void *other,
4566 void *ex) {
4567 return ctx->cert->sec_cb;
4568 }
4569
SSL_CTX_set0_security_ex_data(SSL_CTX * ctx,void * ex)4570 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
4571 {
4572 ctx->cert->sec_ex = ex;
4573 }
4574
SSL_CTX_get0_security_ex_data(const SSL_CTX * ctx)4575 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
4576 {
4577 return ctx->cert->sec_ex;
4578 }
4579
4580 /*
4581 * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that
4582 * can return unsigned long, instead of the generic long return value from the
4583 * control interface.
4584 */
SSL_CTX_get_options(const SSL_CTX * ctx)4585 unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
4586 {
4587 return ctx->options;
4588 }
4589
SSL_get_options(const SSL * s)4590 unsigned long SSL_get_options(const SSL *s)
4591 {
4592 return s->options;
4593 }
4594
SSL_CTX_set_options(SSL_CTX * ctx,unsigned long op)4595 unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op)
4596 {
4597 return ctx->options |= op;
4598 }
4599
SSL_set_options(SSL * s,unsigned long op)4600 unsigned long SSL_set_options(SSL *s, unsigned long op)
4601 {
4602 return s->options |= op;
4603 }
4604
SSL_CTX_clear_options(SSL_CTX * ctx,unsigned long op)4605 unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op)
4606 {
4607 return ctx->options &= ~op;
4608 }
4609
SSL_clear_options(SSL * s,unsigned long op)4610 unsigned long SSL_clear_options(SSL *s, unsigned long op)
4611 {
4612 return s->options &= ~op;
4613 }
4614
STACK_OF(X509)4615 STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
4616 {
4617 return s->verified_chain;
4618 }
4619
4620 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
4621
4622 #ifndef OPENSSL_NO_CT
4623
4624 /*
4625 * Moves SCTs from the |src| stack to the |dst| stack.
4626 * The source of each SCT will be set to |origin|.
4627 * If |dst| points to a NULL pointer, a new stack will be created and owned by
4628 * the caller.
4629 * Returns the number of SCTs moved, or a negative integer if an error occurs.
4630 */
ct_move_scts(STACK_OF (SCT)** dst,STACK_OF (SCT)* src,sct_source_t origin)4631 static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
4632 sct_source_t origin)
4633 {
4634 int scts_moved = 0;
4635 SCT *sct = NULL;
4636
4637 if (*dst == NULL) {
4638 *dst = sk_SCT_new_null();
4639 if (*dst == NULL) {
4640 SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE);
4641 goto err;
4642 }
4643 }
4644
4645 while ((sct = sk_SCT_pop(src)) != NULL) {
4646 if (SCT_set_source(sct, origin) != 1)
4647 goto err;
4648
4649 if (sk_SCT_push(*dst, sct) <= 0)
4650 goto err;
4651 scts_moved += 1;
4652 }
4653
4654 return scts_moved;
4655 err:
4656 if (sct != NULL)
4657 sk_SCT_push(src, sct); /* Put the SCT back */
4658 return -1;
4659 }
4660
4661 /*
4662 * Look for data collected during ServerHello and parse if found.
4663 * Returns the number of SCTs extracted.
4664 */
ct_extract_tls_extension_scts(SSL * s)4665 static int ct_extract_tls_extension_scts(SSL *s)
4666 {
4667 int scts_extracted = 0;
4668
4669 if (s->ext.scts != NULL) {
4670 const unsigned char *p = s->ext.scts;
4671 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
4672
4673 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
4674
4675 SCT_LIST_free(scts);
4676 }
4677
4678 return scts_extracted;
4679 }
4680
4681 /*
4682 * Checks for an OCSP response and then attempts to extract any SCTs found if it
4683 * contains an SCT X509 extension. They will be stored in |s->scts|.
4684 * Returns:
4685 * - The number of SCTs extracted, assuming an OCSP response exists.
4686 * - 0 if no OCSP response exists or it contains no SCTs.
4687 * - A negative integer if an error occurs.
4688 */
ct_extract_ocsp_response_scts(SSL * s)4689 static int ct_extract_ocsp_response_scts(SSL *s)
4690 {
4691 # ifndef OPENSSL_NO_OCSP
4692 int scts_extracted = 0;
4693 const unsigned char *p;
4694 OCSP_BASICRESP *br = NULL;
4695 OCSP_RESPONSE *rsp = NULL;
4696 STACK_OF(SCT) *scts = NULL;
4697 int i;
4698
4699 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
4700 goto err;
4701
4702 p = s->ext.ocsp.resp;
4703 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
4704 if (rsp == NULL)
4705 goto err;
4706
4707 br = OCSP_response_get1_basic(rsp);
4708 if (br == NULL)
4709 goto err;
4710
4711 for (i = 0; i < OCSP_resp_count(br); ++i) {
4712 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
4713
4714 if (single == NULL)
4715 continue;
4716
4717 scts =
4718 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
4719 scts_extracted =
4720 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
4721 if (scts_extracted < 0)
4722 goto err;
4723 }
4724 err:
4725 SCT_LIST_free(scts);
4726 OCSP_BASICRESP_free(br);
4727 OCSP_RESPONSE_free(rsp);
4728 return scts_extracted;
4729 # else
4730 /* Behave as if no OCSP response exists */
4731 return 0;
4732 # endif
4733 }
4734
4735 /*
4736 * Attempts to extract SCTs from the peer certificate.
4737 * Return the number of SCTs extracted, or a negative integer if an error
4738 * occurs.
4739 */
ct_extract_x509v3_extension_scts(SSL * s)4740 static int ct_extract_x509v3_extension_scts(SSL *s)
4741 {
4742 int scts_extracted = 0;
4743 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4744
4745 if (cert != NULL) {
4746 STACK_OF(SCT) *scts =
4747 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
4748
4749 scts_extracted =
4750 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
4751
4752 SCT_LIST_free(scts);
4753 }
4754
4755 return scts_extracted;
4756 }
4757
4758 /*
4759 * Attempts to find all received SCTs by checking TLS extensions, the OCSP
4760 * response (if it exists) and X509v3 extensions in the certificate.
4761 * Returns NULL if an error occurs.
4762 */
STACK_OF(SCT)4763 const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
4764 {
4765 if (!s->scts_parsed) {
4766 if (ct_extract_tls_extension_scts(s) < 0 ||
4767 ct_extract_ocsp_response_scts(s) < 0 ||
4768 ct_extract_x509v3_extension_scts(s) < 0)
4769 goto err;
4770
4771 s->scts_parsed = 1;
4772 }
4773 return s->scts;
4774 err:
4775 return NULL;
4776 }
4777
ct_permissive(const CT_POLICY_EVAL_CTX * ctx,const STACK_OF (SCT)* scts,void * unused_arg)4778 static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
4779 const STACK_OF(SCT) *scts, void *unused_arg)
4780 {
4781 return 1;
4782 }
4783
ct_strict(const CT_POLICY_EVAL_CTX * ctx,const STACK_OF (SCT)* scts,void * unused_arg)4784 static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
4785 const STACK_OF(SCT) *scts, void *unused_arg)
4786 {
4787 int count = scts != NULL ? sk_SCT_num(scts) : 0;
4788 int i;
4789
4790 for (i = 0; i < count; ++i) {
4791 SCT *sct = sk_SCT_value(scts, i);
4792 int status = SCT_get_validation_status(sct);
4793
4794 if (status == SCT_VALIDATION_STATUS_VALID)
4795 return 1;
4796 }
4797 SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS);
4798 return 0;
4799 }
4800
SSL_set_ct_validation_callback(SSL * s,ssl_ct_validation_cb callback,void * arg)4801 int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
4802 void *arg)
4803 {
4804 /*
4805 * Since code exists that uses the custom extension handler for CT, look
4806 * for this and throw an error if they have already registered to use CT.
4807 */
4808 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
4809 TLSEXT_TYPE_signed_certificate_timestamp))
4810 {
4811 SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK,
4812 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4813 return 0;
4814 }
4815
4816 if (callback != NULL) {
4817 /*
4818 * If we are validating CT, then we MUST accept SCTs served via OCSP
4819 */
4820 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
4821 return 0;
4822 }
4823
4824 s->ct_validation_callback = callback;
4825 s->ct_validation_callback_arg = arg;
4826
4827 return 1;
4828 }
4829
SSL_CTX_set_ct_validation_callback(SSL_CTX * ctx,ssl_ct_validation_cb callback,void * arg)4830 int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
4831 ssl_ct_validation_cb callback, void *arg)
4832 {
4833 /*
4834 * Since code exists that uses the custom extension handler for CT, look for
4835 * this and throw an error if they have already registered to use CT.
4836 */
4837 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
4838 TLSEXT_TYPE_signed_certificate_timestamp))
4839 {
4840 SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK,
4841 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4842 return 0;
4843 }
4844
4845 ctx->ct_validation_callback = callback;
4846 ctx->ct_validation_callback_arg = arg;
4847 return 1;
4848 }
4849
SSL_ct_is_enabled(const SSL * s)4850 int SSL_ct_is_enabled(const SSL *s)
4851 {
4852 return s->ct_validation_callback != NULL;
4853 }
4854
SSL_CTX_ct_is_enabled(const SSL_CTX * ctx)4855 int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
4856 {
4857 return ctx->ct_validation_callback != NULL;
4858 }
4859
ssl_validate_ct(SSL * s)4860 int ssl_validate_ct(SSL *s)
4861 {
4862 int ret = 0;
4863 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4864 X509 *issuer;
4865 SSL_DANE *dane = &s->dane;
4866 CT_POLICY_EVAL_CTX *ctx = NULL;
4867 const STACK_OF(SCT) *scts;
4868
4869 /*
4870 * If no callback is set, the peer is anonymous, or its chain is invalid,
4871 * skip SCT validation - just return success. Applications that continue
4872 * handshakes without certificates, with unverified chains, or pinned leaf
4873 * certificates are outside the scope of the WebPKI and CT.
4874 *
4875 * The above exclusions notwithstanding the vast majority of peers will
4876 * have rather ordinary certificate chains validated by typical
4877 * applications that perform certificate verification and therefore will
4878 * process SCTs when enabled.
4879 */
4880 if (s->ct_validation_callback == NULL || cert == NULL ||
4881 s->verify_result != X509_V_OK ||
4882 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
4883 return 1;
4884
4885 /*
4886 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
4887 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2
4888 */
4889 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
4890 switch (dane->mtlsa->usage) {
4891 case DANETLS_USAGE_DANE_TA:
4892 case DANETLS_USAGE_DANE_EE:
4893 return 1;
4894 }
4895 }
4896
4897 ctx = CT_POLICY_EVAL_CTX_new();
4898 if (ctx == NULL) {
4899 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_VALIDATE_CT,
4900 ERR_R_MALLOC_FAILURE);
4901 goto end;
4902 }
4903
4904 issuer = sk_X509_value(s->verified_chain, 1);
4905 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
4906 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
4907 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store);
4908 CT_POLICY_EVAL_CTX_set_time(
4909 ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000);
4910
4911 scts = SSL_get0_peer_scts(s);
4912
4913 /*
4914 * This function returns success (> 0) only when all the SCTs are valid, 0
4915 * when some are invalid, and < 0 on various internal errors (out of
4916 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient
4917 * reason to abort the handshake, that decision is up to the callback.
4918 * Therefore, we error out only in the unexpected case that the return
4919 * value is negative.
4920 *
4921 * XXX: One might well argue that the return value of this function is an
4922 * unfortunate design choice. Its job is only to determine the validation
4923 * status of each of the provided SCTs. So long as it correctly separates
4924 * the wheat from the chaff it should return success. Failure in this case
4925 * ought to correspond to an inability to carry out its duties.
4926 */
4927 if (SCT_LIST_validate(scts, ctx) < 0) {
4928 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
4929 SSL_R_SCT_VERIFICATION_FAILED);
4930 goto end;
4931 }
4932
4933 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
4934 if (ret < 0)
4935 ret = 0; /* This function returns 0 on failure */
4936 if (!ret)
4937 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
4938 SSL_R_CALLBACK_FAILED);
4939
4940 end:
4941 CT_POLICY_EVAL_CTX_free(ctx);
4942 /*
4943 * With SSL_VERIFY_NONE the session may be cached and re-used despite a
4944 * failure return code here. Also the application may wish the complete
4945 * the handshake, and then disconnect cleanly at a higher layer, after
4946 * checking the verification status of the completed connection.
4947 *
4948 * We therefore force a certificate verification failure which will be
4949 * visible via SSL_get_verify_result() and cached as part of any resumed
4950 * session.
4951 *
4952 * Note: the permissive callback is for information gathering only, always
4953 * returns success, and does not affect verification status. Only the
4954 * strict callback or a custom application-specified callback can trigger
4955 * connection failure or record a verification error.
4956 */
4957 if (ret <= 0)
4958 s->verify_result = X509_V_ERR_NO_VALID_SCTS;
4959 return ret;
4960 }
4961
SSL_CTX_enable_ct(SSL_CTX * ctx,int validation_mode)4962 int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
4963 {
4964 switch (validation_mode) {
4965 default:
4966 SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
4967 return 0;
4968 case SSL_CT_VALIDATION_PERMISSIVE:
4969 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
4970 case SSL_CT_VALIDATION_STRICT:
4971 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
4972 }
4973 }
4974
SSL_enable_ct(SSL * s,int validation_mode)4975 int SSL_enable_ct(SSL *s, int validation_mode)
4976 {
4977 switch (validation_mode) {
4978 default:
4979 SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
4980 return 0;
4981 case SSL_CT_VALIDATION_PERMISSIVE:
4982 return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
4983 case SSL_CT_VALIDATION_STRICT:
4984 return SSL_set_ct_validation_callback(s, ct_strict, NULL);
4985 }
4986 }
4987
SSL_CTX_set_default_ctlog_list_file(SSL_CTX * ctx)4988 int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
4989 {
4990 return CTLOG_STORE_load_default_file(ctx->ctlog_store);
4991 }
4992
SSL_CTX_set_ctlog_list_file(SSL_CTX * ctx,const char * path)4993 int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
4994 {
4995 return CTLOG_STORE_load_file(ctx->ctlog_store, path);
4996 }
4997
SSL_CTX_set0_ctlog_store(SSL_CTX * ctx,CTLOG_STORE * logs)4998 void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
4999 {
5000 CTLOG_STORE_free(ctx->ctlog_store);
5001 ctx->ctlog_store = logs;
5002 }
5003
SSL_CTX_get0_ctlog_store(const SSL_CTX * ctx)5004 const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
5005 {
5006 return ctx->ctlog_store;
5007 }
5008
5009 #endif /* OPENSSL_NO_CT */
5010
SSL_CTX_set_client_hello_cb(SSL_CTX * c,SSL_client_hello_cb_fn cb,void * arg)5011 void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb,
5012 void *arg)
5013 {
5014 c->client_hello_cb = cb;
5015 c->client_hello_cb_arg = arg;
5016 }
5017
SSL_client_hello_isv2(SSL * s)5018 int SSL_client_hello_isv2(SSL *s)
5019 {
5020 if (s->clienthello == NULL)
5021 return 0;
5022 return s->clienthello->isv2;
5023 }
5024
SSL_client_hello_get0_legacy_version(SSL * s)5025 unsigned int SSL_client_hello_get0_legacy_version(SSL *s)
5026 {
5027 if (s->clienthello == NULL)
5028 return 0;
5029 return s->clienthello->legacy_version;
5030 }
5031
SSL_client_hello_get0_random(SSL * s,const unsigned char ** out)5032 size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out)
5033 {
5034 if (s->clienthello == NULL)
5035 return 0;
5036 if (out != NULL)
5037 *out = s->clienthello->random;
5038 return SSL3_RANDOM_SIZE;
5039 }
5040
SSL_client_hello_get0_session_id(SSL * s,const unsigned char ** out)5041 size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out)
5042 {
5043 if (s->clienthello == NULL)
5044 return 0;
5045 if (out != NULL)
5046 *out = s->clienthello->session_id;
5047 return s->clienthello->session_id_len;
5048 }
5049
SSL_client_hello_get0_ciphers(SSL * s,const unsigned char ** out)5050 size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out)
5051 {
5052 if (s->clienthello == NULL)
5053 return 0;
5054 if (out != NULL)
5055 *out = PACKET_data(&s->clienthello->ciphersuites);
5056 return PACKET_remaining(&s->clienthello->ciphersuites);
5057 }
5058
SSL_client_hello_get0_compression_methods(SSL * s,const unsigned char ** out)5059 size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out)
5060 {
5061 if (s->clienthello == NULL)
5062 return 0;
5063 if (out != NULL)
5064 *out = s->clienthello->compressions;
5065 return s->clienthello->compressions_len;
5066 }
5067
SSL_client_hello_get1_extensions_present(SSL * s,int ** out,size_t * outlen)5068 int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen)
5069 {
5070 RAW_EXTENSION *ext;
5071 int *present;
5072 size_t num = 0, i;
5073
5074 if (s->clienthello == NULL || out == NULL || outlen == NULL)
5075 return 0;
5076 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
5077 ext = s->clienthello->pre_proc_exts + i;
5078 if (ext->present)
5079 num++;
5080 }
5081 if (num == 0) {
5082 *out = NULL;
5083 *outlen = 0;
5084 return 1;
5085 }
5086 if ((present = OPENSSL_malloc(sizeof(*present) * num)) == NULL) {
5087 SSLerr(SSL_F_SSL_CLIENT_HELLO_GET1_EXTENSIONS_PRESENT,
5088 ERR_R_MALLOC_FAILURE);
5089 return 0;
5090 }
5091 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
5092 ext = s->clienthello->pre_proc_exts + i;
5093 if (ext->present) {
5094 if (ext->received_order >= num)
5095 goto err;
5096 present[ext->received_order] = ext->type;
5097 }
5098 }
5099 *out = present;
5100 *outlen = num;
5101 return 1;
5102 err:
5103 OPENSSL_free(present);
5104 return 0;
5105 }
5106
SSL_client_hello_get0_ext(SSL * s,unsigned int type,const unsigned char ** out,size_t * outlen)5107 int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
5108 size_t *outlen)
5109 {
5110 size_t i;
5111 RAW_EXTENSION *r;
5112
5113 if (s->clienthello == NULL)
5114 return 0;
5115 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) {
5116 r = s->clienthello->pre_proc_exts + i;
5117 if (r->present && r->type == type) {
5118 if (out != NULL)
5119 *out = PACKET_data(&r->data);
5120 if (outlen != NULL)
5121 *outlen = PACKET_remaining(&r->data);
5122 return 1;
5123 }
5124 }
5125 return 0;
5126 }
5127
SSL_free_buffers(SSL * ssl)5128 int SSL_free_buffers(SSL *ssl)
5129 {
5130 RECORD_LAYER *rl = &ssl->rlayer;
5131
5132 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl))
5133 return 0;
5134
5135 RECORD_LAYER_release(rl);
5136 return 1;
5137 }
5138
SSL_alloc_buffers(SSL * ssl)5139 int SSL_alloc_buffers(SSL *ssl)
5140 {
5141 return ssl3_setup_buffers(ssl);
5142 }
5143
SSL_CTX_set_keylog_callback(SSL_CTX * ctx,SSL_CTX_keylog_cb_func cb)5144 void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
5145 {
5146 ctx->keylog_callback = cb;
5147 }
5148
SSL_CTX_get_keylog_callback(const SSL_CTX * ctx)5149 SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
5150 {
5151 return ctx->keylog_callback;
5152 }
5153
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)5154 static int nss_keylog_int(const char *prefix,
5155 SSL *ssl,
5156 const uint8_t *parameter_1,
5157 size_t parameter_1_len,
5158 const uint8_t *parameter_2,
5159 size_t parameter_2_len)
5160 {
5161 char *out = NULL;
5162 char *cursor = NULL;
5163 size_t out_len = 0;
5164 size_t i;
5165 size_t prefix_len;
5166
5167 if (ssl->ctx->keylog_callback == NULL)
5168 return 1;
5169
5170 /*
5171 * Our output buffer will contain the following strings, rendered with
5172 * space characters in between, terminated by a NULL character: first the
5173 * prefix, then the first parameter, then the second parameter. The
5174 * meaning of each parameter depends on the specific key material being
5175 * logged. Note that the first and second parameters are encoded in
5176 * hexadecimal, so we need a buffer that is twice their lengths.
5177 */
5178 prefix_len = strlen(prefix);
5179 out_len = prefix_len + (2 * parameter_1_len) + (2 * parameter_2_len) + 3;
5180 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
5181 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, SSL_F_NSS_KEYLOG_INT,
5182 ERR_R_MALLOC_FAILURE);
5183 return 0;
5184 }
5185
5186 strcpy(cursor, prefix);
5187 cursor += prefix_len;
5188 *cursor++ = ' ';
5189
5190 for (i = 0; i < parameter_1_len; i++) {
5191 sprintf(cursor, "%02x", parameter_1[i]);
5192 cursor += 2;
5193 }
5194 *cursor++ = ' ';
5195
5196 for (i = 0; i < parameter_2_len; i++) {
5197 sprintf(cursor, "%02x", parameter_2[i]);
5198 cursor += 2;
5199 }
5200 *cursor = '\0';
5201
5202 ssl->ctx->keylog_callback(ssl, (const char *)out);
5203 OPENSSL_clear_free(out, out_len);
5204 return 1;
5205
5206 }
5207
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)5208 int ssl_log_rsa_client_key_exchange(SSL *ssl,
5209 const uint8_t *encrypted_premaster,
5210 size_t encrypted_premaster_len,
5211 const uint8_t *premaster,
5212 size_t premaster_len)
5213 {
5214 if (encrypted_premaster_len < 8) {
5215 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR,
5216 SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
5217 return 0;
5218 }
5219
5220 /* We only want the first 8 bytes of the encrypted premaster as a tag. */
5221 return nss_keylog_int("RSA",
5222 ssl,
5223 encrypted_premaster,
5224 8,
5225 premaster,
5226 premaster_len);
5227 }
5228
ssl_log_secret(SSL * ssl,const char * label,const uint8_t * secret,size_t secret_len)5229 int ssl_log_secret(SSL *ssl,
5230 const char *label,
5231 const uint8_t *secret,
5232 size_t secret_len)
5233 {
5234 return nss_keylog_int(label,
5235 ssl,
5236 ssl->s3->client_random,
5237 SSL3_RANDOM_SIZE,
5238 secret,
5239 secret_len);
5240 }
5241
5242 #define SSLV2_CIPHER_LEN 3
5243
ssl_cache_cipherlist(SSL * s,PACKET * cipher_suites,int sslv2format)5244 int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format)
5245 {
5246 int n;
5247
5248 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5249
5250 if (PACKET_remaining(cipher_suites) == 0) {
5251 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_CACHE_CIPHERLIST,
5252 SSL_R_NO_CIPHERS_SPECIFIED);
5253 return 0;
5254 }
5255
5256 if (PACKET_remaining(cipher_suites) % n != 0) {
5257 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5258 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5259 return 0;
5260 }
5261
5262 OPENSSL_free(s->s3->tmp.ciphers_raw);
5263 s->s3->tmp.ciphers_raw = NULL;
5264 s->s3->tmp.ciphers_rawlen = 0;
5265
5266 if (sslv2format) {
5267 size_t numciphers = PACKET_remaining(cipher_suites) / n;
5268 PACKET sslv2ciphers = *cipher_suites;
5269 unsigned int leadbyte;
5270 unsigned char *raw;
5271
5272 /*
5273 * We store the raw ciphers list in SSLv3+ format so we need to do some
5274 * preprocessing to convert the list first. If there are any SSLv2 only
5275 * ciphersuites with a non-zero leading byte then we are going to
5276 * slightly over allocate because we won't store those. But that isn't a
5277 * problem.
5278 */
5279 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
5280 s->s3->tmp.ciphers_raw = raw;
5281 if (raw == NULL) {
5282 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5283 ERR_R_MALLOC_FAILURE);
5284 return 0;
5285 }
5286 for (s->s3->tmp.ciphers_rawlen = 0;
5287 PACKET_remaining(&sslv2ciphers) > 0;
5288 raw += TLS_CIPHER_LEN) {
5289 if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
5290 || (leadbyte == 0
5291 && !PACKET_copy_bytes(&sslv2ciphers, raw,
5292 TLS_CIPHER_LEN))
5293 || (leadbyte != 0
5294 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
5295 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5296 SSL_R_BAD_PACKET);
5297 OPENSSL_free(s->s3->tmp.ciphers_raw);
5298 s->s3->tmp.ciphers_raw = NULL;
5299 s->s3->tmp.ciphers_rawlen = 0;
5300 return 0;
5301 }
5302 if (leadbyte == 0)
5303 s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN;
5304 }
5305 } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
5306 &s->s3->tmp.ciphers_rawlen)) {
5307 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5308 ERR_R_INTERNAL_ERROR);
5309 return 0;
5310 }
5311 return 1;
5312 }
5313
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)5314 int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
5315 int isv2format, STACK_OF(SSL_CIPHER) **sk,
5316 STACK_OF(SSL_CIPHER) **scsvs)
5317 {
5318 PACKET pkt;
5319
5320 if (!PACKET_buf_init(&pkt, bytes, len))
5321 return 0;
5322 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0);
5323 }
5324
bytes_to_cipher_list(SSL * s,PACKET * cipher_suites,STACK_OF (SSL_CIPHER)** skp,STACK_OF (SSL_CIPHER)** scsvs_out,int sslv2format,int fatal)5325 int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
5326 STACK_OF(SSL_CIPHER) **skp,
5327 STACK_OF(SSL_CIPHER) **scsvs_out,
5328 int sslv2format, int fatal)
5329 {
5330 const SSL_CIPHER *c;
5331 STACK_OF(SSL_CIPHER) *sk = NULL;
5332 STACK_OF(SSL_CIPHER) *scsvs = NULL;
5333 int n;
5334 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
5335 unsigned char cipher[SSLV2_CIPHER_LEN];
5336
5337 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5338
5339 if (PACKET_remaining(cipher_suites) == 0) {
5340 if (fatal)
5341 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_BYTES_TO_CIPHER_LIST,
5342 SSL_R_NO_CIPHERS_SPECIFIED);
5343 else
5344 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
5345 return 0;
5346 }
5347
5348 if (PACKET_remaining(cipher_suites) % n != 0) {
5349 if (fatal)
5350 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5351 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5352 else
5353 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST,
5354 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5355 return 0;
5356 }
5357
5358 sk = sk_SSL_CIPHER_new_null();
5359 scsvs = sk_SSL_CIPHER_new_null();
5360 if (sk == NULL || scsvs == NULL) {
5361 if (fatal)
5362 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5363 ERR_R_MALLOC_FAILURE);
5364 else
5365 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5366 goto err;
5367 }
5368
5369 while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
5370 /*
5371 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
5372 * first byte set to zero, while true SSLv2 ciphers have a non-zero
5373 * first byte. We don't support any true SSLv2 ciphers, so skip them.
5374 */
5375 if (sslv2format && cipher[0] != '\0')
5376 continue;
5377
5378 /* For SSLv2-compat, ignore leading 0-byte. */
5379 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
5380 if (c != NULL) {
5381 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
5382 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
5383 if (fatal)
5384 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
5385 SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5386 else
5387 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5388 goto err;
5389 }
5390 }
5391 }
5392 if (PACKET_remaining(cipher_suites) > 0) {
5393 if (fatal)
5394 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5395 SSL_R_BAD_LENGTH);
5396 else
5397 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH);
5398 goto err;
5399 }
5400
5401 if (skp != NULL)
5402 *skp = sk;
5403 else
5404 sk_SSL_CIPHER_free(sk);
5405 if (scsvs_out != NULL)
5406 *scsvs_out = scsvs;
5407 else
5408 sk_SSL_CIPHER_free(scsvs);
5409 return 1;
5410 err:
5411 sk_SSL_CIPHER_free(sk);
5412 sk_SSL_CIPHER_free(scsvs);
5413 return 0;
5414 }
5415
SSL_CTX_set_max_early_data(SSL_CTX * ctx,uint32_t max_early_data)5416 int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
5417 {
5418 ctx->max_early_data = max_early_data;
5419
5420 return 1;
5421 }
5422
SSL_CTX_get_max_early_data(const SSL_CTX * ctx)5423 uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
5424 {
5425 return ctx->max_early_data;
5426 }
5427
SSL_set_max_early_data(SSL * s,uint32_t max_early_data)5428 int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
5429 {
5430 s->max_early_data = max_early_data;
5431
5432 return 1;
5433 }
5434
SSL_get_max_early_data(const SSL * s)5435 uint32_t SSL_get_max_early_data(const SSL *s)
5436 {
5437 return s->max_early_data;
5438 }
5439
SSL_CTX_set_recv_max_early_data(SSL_CTX * ctx,uint32_t recv_max_early_data)5440 int SSL_CTX_set_recv_max_early_data(SSL_CTX *ctx, uint32_t recv_max_early_data)
5441 {
5442 ctx->recv_max_early_data = recv_max_early_data;
5443
5444 return 1;
5445 }
5446
SSL_CTX_get_recv_max_early_data(const SSL_CTX * ctx)5447 uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX *ctx)
5448 {
5449 return ctx->recv_max_early_data;
5450 }
5451
SSL_set_recv_max_early_data(SSL * s,uint32_t recv_max_early_data)5452 int SSL_set_recv_max_early_data(SSL *s, uint32_t recv_max_early_data)
5453 {
5454 s->recv_max_early_data = recv_max_early_data;
5455
5456 return 1;
5457 }
5458
SSL_get_recv_max_early_data(const SSL * s)5459 uint32_t SSL_get_recv_max_early_data(const SSL *s)
5460 {
5461 return s->recv_max_early_data;
5462 }
5463
ssl_get_max_send_fragment(const SSL * ssl)5464 __owur unsigned int ssl_get_max_send_fragment(const SSL *ssl)
5465 {
5466 /* Return any active Max Fragment Len extension */
5467 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session))
5468 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5469
5470 /* return current SSL connection setting */
5471 return ssl->max_send_fragment;
5472 }
5473
ssl_get_split_send_fragment(const SSL * ssl)5474 __owur unsigned int ssl_get_split_send_fragment(const SSL *ssl)
5475 {
5476 /* Return a value regarding an active Max Fragment Len extension */
5477 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)
5478 && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session))
5479 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5480
5481 /* else limit |split_send_fragment| to current |max_send_fragment| */
5482 if (ssl->split_send_fragment > ssl->max_send_fragment)
5483 return ssl->max_send_fragment;
5484
5485 /* return current SSL connection setting */
5486 return ssl->split_send_fragment;
5487 }
5488
SSL_stateless(SSL * s)5489 int SSL_stateless(SSL *s)
5490 {
5491 int ret;
5492
5493 /* Ensure there is no state left over from a previous invocation */
5494 if (!SSL_clear(s))
5495 return 0;
5496
5497 ERR_clear_error();
5498
5499 s->s3->flags |= TLS1_FLAGS_STATELESS;
5500 ret = SSL_accept(s);
5501 s->s3->flags &= ~TLS1_FLAGS_STATELESS;
5502
5503 if (ret > 0 && s->ext.cookieok)
5504 return 1;
5505
5506 if (s->hello_retry_request == SSL_HRR_PENDING && !ossl_statem_in_error(s))
5507 return 0;
5508
5509 return -1;
5510 }
5511
SSL_CTX_set_post_handshake_auth(SSL_CTX * ctx,int val)5512 void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val)
5513 {
5514 ctx->pha_enabled = val;
5515 }
5516
SSL_set_post_handshake_auth(SSL * ssl,int val)5517 void SSL_set_post_handshake_auth(SSL *ssl, int val)
5518 {
5519 ssl->pha_enabled = val;
5520 }
5521
SSL_verify_client_post_handshake(SSL * ssl)5522 int SSL_verify_client_post_handshake(SSL *ssl)
5523 {
5524 if (!SSL_IS_TLS13(ssl)) {
5525 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_WRONG_SSL_VERSION);
5526 return 0;
5527 }
5528 if (!ssl->server) {
5529 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_NOT_SERVER);
5530 return 0;
5531 }
5532
5533 if (!SSL_is_init_finished(ssl)) {
5534 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_STILL_IN_INIT);
5535 return 0;
5536 }
5537
5538 switch (ssl->post_handshake_auth) {
5539 case SSL_PHA_NONE:
5540 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_EXTENSION_NOT_RECEIVED);
5541 return 0;
5542 default:
5543 case SSL_PHA_EXT_SENT:
5544 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, ERR_R_INTERNAL_ERROR);
5545 return 0;
5546 case SSL_PHA_EXT_RECEIVED:
5547 break;
5548 case SSL_PHA_REQUEST_PENDING:
5549 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_PENDING);
5550 return 0;
5551 case SSL_PHA_REQUESTED:
5552 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_SENT);
5553 return 0;
5554 }
5555
5556 ssl->post_handshake_auth = SSL_PHA_REQUEST_PENDING;
5557
5558 /* checks verify_mode and algorithm_auth */
5559 if (!send_certificate_request(ssl)) {
5560 ssl->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */
5561 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_INVALID_CONFIG);
5562 return 0;
5563 }
5564
5565 ossl_statem_set_in_init(ssl, 1);
5566 return 1;
5567 }
5568
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)5569 int SSL_CTX_set_session_ticket_cb(SSL_CTX *ctx,
5570 SSL_CTX_generate_session_ticket_fn gen_cb,
5571 SSL_CTX_decrypt_session_ticket_fn dec_cb,
5572 void *arg)
5573 {
5574 ctx->generate_ticket_cb = gen_cb;
5575 ctx->decrypt_ticket_cb = dec_cb;
5576 ctx->ticket_cb_data = arg;
5577 return 1;
5578 }
5579
SSL_CTX_set_allow_early_data_cb(SSL_CTX * ctx,SSL_allow_early_data_cb_fn cb,void * arg)5580 void SSL_CTX_set_allow_early_data_cb(SSL_CTX *ctx,
5581 SSL_allow_early_data_cb_fn cb,
5582 void *arg)
5583 {
5584 ctx->allow_early_data_cb = cb;
5585 ctx->allow_early_data_cb_data = arg;
5586 }
5587
SSL_set_allow_early_data_cb(SSL * s,SSL_allow_early_data_cb_fn cb,void * arg)5588 void SSL_set_allow_early_data_cb(SSL *s,
5589 SSL_allow_early_data_cb_fn cb,
5590 void *arg)
5591 {
5592 s->allow_early_data_cb = cb;
5593 s->allow_early_data_cb_data = arg;
5594 }
5595