2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* ====================================================================
11 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
12 * ECC cipher suite support in OpenSSL originally developed by
13 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
15 /* ====================================================================
16 * Copyright 2005 Nokia. All rights reserved.
18 * The portions of the attached software ("Contribution") is developed by
19 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
22 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
23 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
24 * support (see RFC 4279) to OpenSSL.
26 * No patent licenses or other rights except those expressly stated in
27 * the OpenSSL open source license shall be deemed granted or received
28 * expressly, by implication, estoppel, or otherwise.
30 * No assurances are provided by Nokia that the Contribution does not
31 * infringe the patent or other intellectual property rights of any third
32 * party or that the license provides you with all the necessary rights
33 * to make use of the Contribution.
35 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
36 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
37 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
38 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
45 #include <openssl/objects.h>
46 #include <openssl/lhash.h>
47 #include <openssl/x509v3.h>
48 #include <openssl/rand.h>
49 #include <openssl/ocsp.h>
50 #include <openssl/dh.h>
51 #include <openssl/engine.h>
52 #include <openssl/async.h>
53 #include <openssl/ct.h>
55 const char SSL_version_str[] = OPENSSL_VERSION_TEXT;
57 SSL3_ENC_METHOD ssl3_undef_enc_method = {
59 * evil casts, but these functions are only called if there's a library
62 (int (*)(SSL *, SSL3_RECORD *, size_t, int))ssl_undefined_function,
63 (int (*)(SSL *, SSL3_RECORD *, unsigned char *, int))ssl_undefined_function,
64 ssl_undefined_function,
65 (int (*)(SSL *, unsigned char *, unsigned char *, size_t, size_t *))
66 ssl_undefined_function,
67 (int (*)(SSL *, int))ssl_undefined_function,
68 (size_t (*)(SSL *, const char *, size_t, unsigned char *))
69 ssl_undefined_function,
70 NULL, /* client_finished_label */
71 0, /* client_finished_label_len */
72 NULL, /* server_finished_label */
73 0, /* server_finished_label_len */
74 (int (*)(int))ssl_undefined_function,
75 (int (*)(SSL *, unsigned char *, size_t, const char *,
76 size_t, const unsigned char *, size_t,
77 int use_context))ssl_undefined_function,
80 struct ssl_async_args {
84 enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
86 int (*func_read) (SSL *, void *, size_t, size_t *);
87 int (*func_write) (SSL *, const void *, size_t, size_t *);
88 int (*func_other) (SSL *);
98 DANETLS_MATCHING_FULL, 0, NID_undef
101 DANETLS_MATCHING_2256, 1, NID_sha256
104 DANETLS_MATCHING_2512, 2, NID_sha512
108 static int ssl_write_early_finish(SSL *s);
110 static int dane_ctx_enable(struct dane_ctx_st *dctx)
112 const EVP_MD **mdevp;
114 uint8_t mdmax = DANETLS_MATCHING_LAST;
115 int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */
118 if (dctx->mdevp != NULL)
121 mdevp = OPENSSL_zalloc(n * sizeof(*mdevp));
122 mdord = OPENSSL_zalloc(n * sizeof(*mdord));
124 if (mdord == NULL || mdevp == NULL) {
127 SSLerr(SSL_F_DANE_CTX_ENABLE, ERR_R_MALLOC_FAILURE);
131 /* Install default entries */
132 for (i = 0; i < OSSL_NELEM(dane_mds); ++i) {
135 if (dane_mds[i].nid == NID_undef ||
136 (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL)
138 mdevp[dane_mds[i].mtype] = md;
139 mdord[dane_mds[i].mtype] = dane_mds[i].ord;
149 static void dane_ctx_final(struct dane_ctx_st *dctx)
151 OPENSSL_free(dctx->mdevp);
154 OPENSSL_free(dctx->mdord);
159 static void tlsa_free(danetls_record *t)
163 OPENSSL_free(t->data);
164 EVP_PKEY_free(t->spki);
168 static void dane_final(SSL_DANE *dane)
170 sk_danetls_record_pop_free(dane->trecs, tlsa_free);
173 sk_X509_pop_free(dane->certs, X509_free);
176 X509_free(dane->mcert);
184 * dane_copy - Copy dane configuration, sans verification state.
186 static int ssl_dane_dup(SSL *to, SSL *from)
191 if (!DANETLS_ENABLED(&from->dane))
194 dane_final(&to->dane);
195 to->dane.flags = from->dane.flags;
196 to->dane.dctx = &to->ctx->dane;
197 to->dane.trecs = sk_danetls_record_new_null();
199 if (to->dane.trecs == NULL) {
200 SSLerr(SSL_F_SSL_DANE_DUP, ERR_R_MALLOC_FAILURE);
204 num = sk_danetls_record_num(from->dane.trecs);
205 for (i = 0; i < num; ++i) {
206 danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
208 if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype,
209 t->data, t->dlen) <= 0)
215 static int dane_mtype_set(struct dane_ctx_st *dctx,
216 const EVP_MD *md, uint8_t mtype, uint8_t ord)
220 if (mtype == DANETLS_MATCHING_FULL && md != NULL) {
221 SSLerr(SSL_F_DANE_MTYPE_SET, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL);
225 if (mtype > dctx->mdmax) {
226 const EVP_MD **mdevp;
228 int n = ((int)mtype) + 1;
230 mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp));
232 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
237 mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
239 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
244 /* Zero-fill any gaps */
245 for (i = dctx->mdmax + 1; i < mtype; ++i) {
253 dctx->mdevp[mtype] = md;
254 /* Coerce ordinal of disabled matching types to 0 */
255 dctx->mdord[mtype] = (md == NULL) ? 0 : ord;
260 static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype)
262 if (mtype > dane->dctx->mdmax)
264 return dane->dctx->mdevp[mtype];
267 static int dane_tlsa_add(SSL_DANE *dane,
270 uint8_t mtype, unsigned char *data, size_t dlen)
273 const EVP_MD *md = NULL;
274 int ilen = (int)dlen;
278 if (dane->trecs == NULL) {
279 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_NOT_ENABLED);
283 if (ilen < 0 || dlen != (size_t)ilen) {
284 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
288 if (usage > DANETLS_USAGE_LAST) {
289 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
293 if (selector > DANETLS_SELECTOR_LAST) {
294 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_SELECTOR);
298 if (mtype != DANETLS_MATCHING_FULL) {
299 md = tlsa_md_get(dane, mtype);
301 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
306 if (md != NULL && dlen != (size_t)EVP_MD_size(md)) {
307 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
311 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_NULL_DATA);
315 if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) {
316 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
321 t->selector = selector;
323 t->data = OPENSSL_malloc(dlen);
324 if (t->data == NULL) {
326 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
329 memcpy(t->data, data, dlen);
332 /* Validate and cache full certificate or public key */
333 if (mtype == DANETLS_MATCHING_FULL) {
334 const unsigned char *p = data;
336 EVP_PKEY *pkey = NULL;
339 case DANETLS_SELECTOR_CERT:
340 if (!d2i_X509(&cert, &p, ilen) || p < data ||
341 dlen != (size_t)(p - data)) {
343 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
346 if (X509_get0_pubkey(cert) == NULL) {
348 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
352 if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) {
358 * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA
359 * records that contain full certificates of trust-anchors that are
360 * not present in the wire chain. For usage PKIX-TA(0), we augment
361 * the chain with untrusted Full(0) certificates from DNS, in case
362 * they are missing from the chain.
364 if ((dane->certs == NULL &&
365 (dane->certs = sk_X509_new_null()) == NULL) ||
366 !sk_X509_push(dane->certs, cert)) {
367 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
374 case DANETLS_SELECTOR_SPKI:
375 if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
376 dlen != (size_t)(p - data)) {
378 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
383 * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA
384 * records that contain full bare keys of trust-anchors that are
385 * not present in the wire chain.
387 if (usage == DANETLS_USAGE_DANE_TA)
396 * Find the right insertion point for the new record.
398 * See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that
399 * they can be processed first, as they require no chain building, and no
400 * expiration or hostname checks. Because DANE-EE(3) is numerically
401 * largest, this is accomplished via descending sort by "usage".
403 * We also sort in descending order by matching ordinal to simplify
404 * the implementation of digest agility in the verification code.
406 * The choice of order for the selector is not significant, so we
407 * use the same descending order for consistency.
409 num = sk_danetls_record_num(dane->trecs);
410 for (i = 0; i < num; ++i) {
411 danetls_record *rec = sk_danetls_record_value(dane->trecs, i);
413 if (rec->usage > usage)
415 if (rec->usage < usage)
417 if (rec->selector > selector)
419 if (rec->selector < selector)
421 if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype])
426 if (!sk_danetls_record_insert(dane->trecs, t, i)) {
428 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
431 dane->umask |= DANETLS_USAGE_BIT(usage);
436 static void clear_ciphers(SSL *s)
438 /* clear the current cipher */
439 ssl_clear_cipher_ctx(s);
440 ssl_clear_hash_ctx(&s->read_hash);
441 ssl_clear_hash_ctx(&s->write_hash);
444 int SSL_clear(SSL *s)
446 if (s->method == NULL) {
447 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED);
451 if (ssl_clear_bad_session(s)) {
452 SSL_SESSION_free(s->session);
460 if (s->renegotiate) {
461 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
465 ossl_statem_clear(s);
467 s->version = s->method->version;
468 s->client_version = s->version;
469 s->rwstate = SSL_NOTHING;
471 BUF_MEM_free(s->init_buf);
476 s->key_update = SSL_KEY_UPDATE_NONE;
478 /* Reset DANE verification result state */
481 X509_free(s->dane.mcert);
482 s->dane.mcert = NULL;
483 s->dane.mtlsa = NULL;
485 /* Clear the verification result peername */
486 X509_VERIFY_PARAM_move_peername(s->param, NULL);
489 * Check to see if we were changed into a different method, if so, revert
490 * back if we are not doing session-id reuse.
492 if (!ossl_statem_get_in_handshake(s) && (s->session == NULL)
493 && (s->method != s->ctx->method)) {
494 s->method->ssl_free(s);
495 s->method = s->ctx->method;
496 if (!s->method->ssl_new(s))
499 s->method->ssl_clear(s);
501 RECORD_LAYER_clear(&s->rlayer);
506 /** Used to change an SSL_CTXs default SSL method type */
507 int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
509 STACK_OF(SSL_CIPHER) *sk;
513 sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list),
514 &(ctx->cipher_list_by_id),
515 SSL_DEFAULT_CIPHER_LIST, ctx->cert);
516 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
517 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
523 SSL *SSL_new(SSL_CTX *ctx)
528 SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX);
531 if (ctx->method == NULL) {
532 SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
536 s = OPENSSL_zalloc(sizeof(*s));
540 s->lock = CRYPTO_THREAD_lock_new();
541 if (s->lock == NULL) {
542 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
547 RECORD_LAYER_init(&s->rlayer, s);
549 s->options = ctx->options;
550 s->dane.flags = ctx->dane.flags;
551 s->min_proto_version = ctx->min_proto_version;
552 s->max_proto_version = ctx->max_proto_version;
554 s->max_cert_list = ctx->max_cert_list;
556 s->max_early_data = ctx->max_early_data;
559 * Earlier library versions used to copy the pointer to the CERT, not
560 * its contents; only when setting new parameters for the per-SSL
561 * copy, ssl_cert_new would be called (and the direct reference to
562 * the per-SSL_CTX settings would be lost, but those still were
563 * indirectly accessed for various purposes, and for that reason they
564 * used to be known as s->ctx->default_cert). Now we don't look at the
565 * SSL_CTX's CERT after having duplicated it once.
567 s->cert = ssl_cert_dup(ctx->cert);
571 RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
572 s->msg_callback = ctx->msg_callback;
573 s->msg_callback_arg = ctx->msg_callback_arg;
574 s->verify_mode = ctx->verify_mode;
575 s->not_resumable_session_cb = ctx->not_resumable_session_cb;
576 s->sid_ctx_length = ctx->sid_ctx_length;
577 OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
578 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
579 s->verify_callback = ctx->default_verify_callback;
580 s->generate_session_id = ctx->generate_session_id;
582 s->param = X509_VERIFY_PARAM_new();
583 if (s->param == NULL)
585 X509_VERIFY_PARAM_inherit(s->param, ctx->param);
586 s->quiet_shutdown = ctx->quiet_shutdown;
587 s->max_send_fragment = ctx->max_send_fragment;
588 s->split_send_fragment = ctx->split_send_fragment;
589 s->max_pipelines = ctx->max_pipelines;
590 if (s->max_pipelines > 1)
591 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
592 if (ctx->default_read_buf_len > 0)
593 SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len);
598 s->ext.debug_arg = NULL;
599 s->ext.ticket_expected = 0;
600 s->ext.status_type = ctx->ext.status_type;
601 s->ext.status_expected = 0;
602 s->ext.ocsp.ids = NULL;
603 s->ext.ocsp.exts = NULL;
604 s->ext.ocsp.resp = NULL;
605 s->ext.ocsp.resp_len = 0;
607 s->session_ctx = ctx;
608 #ifndef OPENSSL_NO_EC
609 if (ctx->ext.ecpointformats) {
610 s->ext.ecpointformats =
611 OPENSSL_memdup(ctx->ext.ecpointformats,
612 ctx->ext.ecpointformats_len);
613 if (!s->ext.ecpointformats)
615 s->ext.ecpointformats_len =
616 ctx->ext.ecpointformats_len;
618 if (ctx->ext.supportedgroups) {
619 s->ext.supportedgroups =
620 OPENSSL_memdup(ctx->ext.supportedgroups,
621 ctx->ext.supportedgroups_len);
622 if (!s->ext.supportedgroups)
624 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
627 #ifndef OPENSSL_NO_NEXTPROTONEG
631 if (s->ctx->ext.alpn) {
632 s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
633 if (s->ext.alpn == NULL)
635 memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
636 s->ext.alpn_len = s->ctx->ext.alpn_len;
639 s->verified_chain = NULL;
640 s->verify_result = X509_V_OK;
642 s->default_passwd_callback = ctx->default_passwd_callback;
643 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
645 s->method = ctx->method;
647 s->key_update = SSL_KEY_UPDATE_NONE;
649 if (!s->method->ssl_new(s))
652 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
657 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
660 #ifndef OPENSSL_NO_PSK
661 s->psk_client_callback = ctx->psk_client_callback;
662 s->psk_server_callback = ctx->psk_server_callback;
667 #ifndef OPENSSL_NO_CT
668 if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
669 ctx->ct_validation_callback_arg))
676 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
680 int SSL_is_dtls(const SSL *s)
682 return SSL_IS_DTLS(s) ? 1 : 0;
685 int SSL_up_ref(SSL *s)
689 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
692 REF_PRINT_COUNT("SSL", s);
693 REF_ASSERT_ISNT(i < 2);
694 return ((i > 1) ? 1 : 0);
697 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
698 unsigned int sid_ctx_len)
700 if (sid_ctx_len > sizeof ctx->sid_ctx) {
701 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
702 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
705 ctx->sid_ctx_length = sid_ctx_len;
706 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
711 int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
712 unsigned int sid_ctx_len)
714 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
715 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
716 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
719 ssl->sid_ctx_length = sid_ctx_len;
720 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
725 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
727 CRYPTO_THREAD_write_lock(ctx->lock);
728 ctx->generate_session_id = cb;
729 CRYPTO_THREAD_unlock(ctx->lock);
733 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
735 CRYPTO_THREAD_write_lock(ssl->lock);
736 ssl->generate_session_id = cb;
737 CRYPTO_THREAD_unlock(ssl->lock);
741 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
745 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
746 * we can "construct" a session to give us the desired check - ie. to
747 * find if there's a session in the hash table that would conflict with
748 * any new session built out of this id/id_len and the ssl_version in use
753 if (id_len > sizeof r.session_id)
756 r.ssl_version = ssl->version;
757 r.session_id_length = id_len;
758 memcpy(r.session_id, id, id_len);
760 CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
761 p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
762 CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
766 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
768 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
771 int SSL_set_purpose(SSL *s, int purpose)
773 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
776 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
778 return X509_VERIFY_PARAM_set_trust(s->param, trust);
781 int SSL_set_trust(SSL *s, int trust)
783 return X509_VERIFY_PARAM_set_trust(s->param, trust);
786 int SSL_set1_host(SSL *s, const char *hostname)
788 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
791 int SSL_add1_host(SSL *s, const char *hostname)
793 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
796 void SSL_set_hostflags(SSL *s, unsigned int flags)
798 X509_VERIFY_PARAM_set_hostflags(s->param, flags);
801 const char *SSL_get0_peername(SSL *s)
803 return X509_VERIFY_PARAM_get0_peername(s->param);
806 int SSL_CTX_dane_enable(SSL_CTX *ctx)
808 return dane_ctx_enable(&ctx->dane);
811 unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
813 unsigned long orig = ctx->dane.flags;
815 ctx->dane.flags |= flags;
819 unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
821 unsigned long orig = ctx->dane.flags;
823 ctx->dane.flags &= ~flags;
827 int SSL_dane_enable(SSL *s, const char *basedomain)
829 SSL_DANE *dane = &s->dane;
831 if (s->ctx->dane.mdmax == 0) {
832 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED);
835 if (dane->trecs != NULL) {
836 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED);
841 * Default SNI name. This rejects empty names, while set1_host below
842 * accepts them and disables host name checks. To avoid side-effects with
843 * invalid input, set the SNI name first.
845 if (s->ext.hostname == NULL) {
846 if (!SSL_set_tlsext_host_name(s, basedomain)) {
847 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
852 /* Primary RFC6125 reference identifier */
853 if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
854 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
860 dane->dctx = &s->ctx->dane;
861 dane->trecs = sk_danetls_record_new_null();
863 if (dane->trecs == NULL) {
864 SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE);
870 unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
872 unsigned long orig = ssl->dane.flags;
874 ssl->dane.flags |= flags;
878 unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
880 unsigned long orig = ssl->dane.flags;
882 ssl->dane.flags &= ~flags;
886 int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
888 SSL_DANE *dane = &s->dane;
890 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
894 *mcert = dane->mcert;
896 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
901 int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
902 uint8_t *mtype, unsigned const char **data, size_t *dlen)
904 SSL_DANE *dane = &s->dane;
906 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
910 *usage = dane->mtlsa->usage;
912 *selector = dane->mtlsa->selector;
914 *mtype = dane->mtlsa->mtype;
916 *data = dane->mtlsa->data;
918 *dlen = dane->mtlsa->dlen;
923 SSL_DANE *SSL_get0_dane(SSL *s)
928 int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
929 uint8_t mtype, unsigned char *data, size_t dlen)
931 return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen);
934 int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
937 return dane_mtype_set(&ctx->dane, md, mtype, ord);
940 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
942 return X509_VERIFY_PARAM_set1(ctx->param, vpm);
945 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
947 return X509_VERIFY_PARAM_set1(ssl->param, vpm);
950 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
955 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
960 void SSL_certs_clear(SSL *s)
962 ssl_cert_clear_certs(s->cert);
965 void SSL_free(SSL *s)
972 CRYPTO_DOWN_REF(&s->references, &i, s->lock);
973 REF_PRINT_COUNT("SSL", s);
976 REF_ASSERT_ISNT(i < 0);
978 X509_VERIFY_PARAM_free(s->param);
979 dane_final(&s->dane);
980 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
982 ssl_free_wbio_buffer(s);
984 BIO_free_all(s->wbio);
985 BIO_free_all(s->rbio);
987 BUF_MEM_free(s->init_buf);
989 /* add extra stuff */
990 sk_SSL_CIPHER_free(s->cipher_list);
991 sk_SSL_CIPHER_free(s->cipher_list_by_id);
993 /* Make the next call work :-) */
994 if (s->session != NULL) {
995 ssl_clear_bad_session(s);
996 SSL_SESSION_free(s->session);
1001 ssl_cert_free(s->cert);
1002 /* Free up if allocated */
1004 OPENSSL_free(s->ext.hostname);
1005 SSL_CTX_free(s->session_ctx);
1006 #ifndef OPENSSL_NO_EC
1007 OPENSSL_free(s->ext.ecpointformats);
1008 OPENSSL_free(s->ext.supportedgroups);
1009 #endif /* OPENSSL_NO_EC */
1010 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
1011 #ifndef OPENSSL_NO_OCSP
1012 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
1014 #ifndef OPENSSL_NO_CT
1015 SCT_LIST_free(s->scts);
1016 OPENSSL_free(s->ext.scts);
1018 OPENSSL_free(s->ext.ocsp.resp);
1019 OPENSSL_free(s->ext.alpn);
1020 OPENSSL_free(s->clienthello);
1022 sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free);
1024 sk_X509_pop_free(s->verified_chain, X509_free);
1026 if (s->method != NULL)
1027 s->method->ssl_free(s);
1029 RECORD_LAYER_release(&s->rlayer);
1031 SSL_CTX_free(s->ctx);
1033 ASYNC_WAIT_CTX_free(s->waitctx);
1035 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1036 OPENSSL_free(s->ext.npn);
1039 #ifndef OPENSSL_NO_SRTP
1040 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
1043 CRYPTO_THREAD_lock_free(s->lock);
1048 void SSL_set0_rbio(SSL *s, BIO *rbio)
1050 BIO_free_all(s->rbio);
1054 void SSL_set0_wbio(SSL *s, BIO *wbio)
1057 * If the output buffering BIO is still in place, remove it
1059 if (s->bbio != NULL)
1060 s->wbio = BIO_pop(s->wbio);
1062 BIO_free_all(s->wbio);
1065 /* Re-attach |bbio| to the new |wbio|. */
1066 if (s->bbio != NULL)
1067 s->wbio = BIO_push(s->bbio, s->wbio);
1070 void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
1073 * For historical reasons, this function has many different cases in
1074 * ownership handling.
1077 /* If nothing has changed, do nothing */
1078 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
1082 * If the two arguments are equal then one fewer reference is granted by the
1083 * caller than we want to take
1085 if (rbio != NULL && rbio == wbio)
1089 * If only the wbio is changed only adopt one reference.
1091 if (rbio == SSL_get_rbio(s)) {
1092 SSL_set0_wbio(s, wbio);
1096 * There is an asymmetry here for historical reasons. If only the rbio is
1097 * changed AND the rbio and wbio were originally different, then we only
1098 * adopt one reference.
1100 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
1101 SSL_set0_rbio(s, rbio);
1105 /* Otherwise, adopt both references. */
1106 SSL_set0_rbio(s, rbio);
1107 SSL_set0_wbio(s, wbio);
1110 BIO *SSL_get_rbio(const SSL *s)
1115 BIO *SSL_get_wbio(const SSL *s)
1117 if (s->bbio != NULL) {
1119 * If |bbio| is active, the true caller-configured BIO is its
1122 return BIO_next(s->bbio);
1127 int SSL_get_fd(const SSL *s)
1129 return SSL_get_rfd(s);
1132 int SSL_get_rfd(const SSL *s)
1137 b = SSL_get_rbio(s);
1138 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1140 BIO_get_fd(r, &ret);
1144 int SSL_get_wfd(const SSL *s)
1149 b = SSL_get_wbio(s);
1150 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1152 BIO_get_fd(r, &ret);
1156 #ifndef OPENSSL_NO_SOCK
1157 int SSL_set_fd(SSL *s, int fd)
1162 bio = BIO_new(BIO_s_socket());
1165 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
1168 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1169 SSL_set_bio(s, bio, bio);
1175 int SSL_set_wfd(SSL *s, int fd)
1177 BIO *rbio = SSL_get_rbio(s);
1179 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
1180 || (int)BIO_get_fd(rbio, NULL) != fd) {
1181 BIO *bio = BIO_new(BIO_s_socket());
1184 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB);
1187 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1188 SSL_set0_wbio(s, bio);
1191 SSL_set0_wbio(s, rbio);
1196 int SSL_set_rfd(SSL *s, int fd)
1198 BIO *wbio = SSL_get_wbio(s);
1200 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
1201 || ((int)BIO_get_fd(wbio, NULL) != fd)) {
1202 BIO *bio = BIO_new(BIO_s_socket());
1205 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB);
1208 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1209 SSL_set0_rbio(s, bio);
1212 SSL_set0_rbio(s, wbio);
1219 /* return length of latest Finished message we sent, copy to 'buf' */
1220 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
1224 if (s->s3 != NULL) {
1225 ret = s->s3->tmp.finish_md_len;
1228 memcpy(buf, s->s3->tmp.finish_md, count);
1233 /* return length of latest Finished message we expected, copy to 'buf' */
1234 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
1238 if (s->s3 != NULL) {
1239 ret = s->s3->tmp.peer_finish_md_len;
1242 memcpy(buf, s->s3->tmp.peer_finish_md, count);
1247 int SSL_get_verify_mode(const SSL *s)
1249 return (s->verify_mode);
1252 int SSL_get_verify_depth(const SSL *s)
1254 return X509_VERIFY_PARAM_get_depth(s->param);
1257 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
1258 return (s->verify_callback);
1261 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
1263 return (ctx->verify_mode);
1266 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
1268 return X509_VERIFY_PARAM_get_depth(ctx->param);
1271 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
1272 return (ctx->default_verify_callback);
1275 void SSL_set_verify(SSL *s, int mode,
1276 int (*callback) (int ok, X509_STORE_CTX *ctx))
1278 s->verify_mode = mode;
1279 if (callback != NULL)
1280 s->verify_callback = callback;
1283 void SSL_set_verify_depth(SSL *s, int depth)
1285 X509_VERIFY_PARAM_set_depth(s->param, depth);
1288 void SSL_set_read_ahead(SSL *s, int yes)
1290 RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
1293 int SSL_get_read_ahead(const SSL *s)
1295 return RECORD_LAYER_get_read_ahead(&s->rlayer);
1298 int SSL_pending(const SSL *s)
1300 size_t pending = s->method->ssl_pending(s);
1303 * SSL_pending cannot work properly if read-ahead is enabled
1304 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
1305 * impossible to fix since SSL_pending cannot report errors that may be
1306 * observed while scanning the new data. (Note that SSL_pending() is
1307 * often used as a boolean value, so we'd better not return -1.)
1309 * SSL_pending also cannot work properly if the value >INT_MAX. In that case
1310 * we just return INT_MAX.
1312 return pending < INT_MAX ? (int)pending : INT_MAX;
1315 int SSL_has_pending(const SSL *s)
1318 * Similar to SSL_pending() but returns a 1 to indicate that we have
1319 * unprocessed data available or 0 otherwise (as opposed to the number of
1320 * bytes available). Unlike SSL_pending() this will take into account
1321 * read_ahead data. A 1 return simply indicates that we have unprocessed
1322 * data. That data may not result in any application data, or we may fail
1323 * to parse the records for some reason.
1328 return RECORD_LAYER_read_pending(&s->rlayer);
1331 X509 *SSL_get_peer_certificate(const SSL *s)
1335 if ((s == NULL) || (s->session == NULL))
1338 r = s->session->peer;
1348 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
1352 if ((s == NULL) || (s->session == NULL))
1355 r = s->session->peer_chain;
1358 * If we are a client, cert_chain includes the peer's own certificate; if
1359 * we are a server, it does not.
1366 * Now in theory, since the calling process own 't' it should be safe to
1367 * modify. We need to be able to read f without being hassled
1369 int SSL_copy_session_id(SSL *t, const SSL *f)
1372 /* Do we need to to SSL locking? */
1373 if (!SSL_set_session(t, SSL_get_session(f))) {
1378 * what if we are setup for one protocol version but want to talk another
1380 if (t->method != f->method) {
1381 t->method->ssl_free(t);
1382 t->method = f->method;
1383 if (t->method->ssl_new(t) == 0)
1387 CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock);
1388 ssl_cert_free(t->cert);
1390 if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
1397 /* Fix this so it checks all the valid key/cert options */
1398 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
1400 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
1401 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1404 if (ctx->cert->key->privatekey == NULL) {
1405 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1408 return (X509_check_private_key
1409 (ctx->cert->key->x509, ctx->cert->key->privatekey));
1412 /* Fix this function so that it takes an optional type parameter */
1413 int SSL_check_private_key(const SSL *ssl)
1416 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
1419 if (ssl->cert->key->x509 == NULL) {
1420 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1423 if (ssl->cert->key->privatekey == NULL) {
1424 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1427 return (X509_check_private_key(ssl->cert->key->x509,
1428 ssl->cert->key->privatekey));
1431 int SSL_waiting_for_async(SSL *s)
1439 int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
1441 ASYNC_WAIT_CTX *ctx = s->waitctx;
1445 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
1448 int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
1449 OSSL_ASYNC_FD *delfd, size_t *numdelfds)
1451 ASYNC_WAIT_CTX *ctx = s->waitctx;
1455 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
1459 int SSL_accept(SSL *s)
1461 if (s->handshake_func == NULL) {
1462 /* Not properly initialized yet */
1463 SSL_set_accept_state(s);
1466 return SSL_do_handshake(s);
1469 int SSL_connect(SSL *s)
1471 if (s->handshake_func == NULL) {
1472 /* Not properly initialized yet */
1473 SSL_set_connect_state(s);
1476 return SSL_do_handshake(s);
1479 long SSL_get_default_timeout(const SSL *s)
1481 return (s->method->get_timeout());
1484 static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
1485 int (*func) (void *))
1488 if (s->waitctx == NULL) {
1489 s->waitctx = ASYNC_WAIT_CTX_new();
1490 if (s->waitctx == NULL)
1493 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args,
1494 sizeof(struct ssl_async_args))) {
1496 s->rwstate = SSL_NOTHING;
1497 SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC);
1500 s->rwstate = SSL_ASYNC_PAUSED;
1503 s->rwstate = SSL_ASYNC_NO_JOBS;
1509 s->rwstate = SSL_NOTHING;
1510 SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR);
1511 /* Shouldn't happen */
1516 static int ssl_io_intern(void *vargs)
1518 struct ssl_async_args *args;
1523 args = (struct ssl_async_args *)vargs;
1527 switch (args->type) {
1529 return args->f.func_read(s, buf, num, &s->asyncrw);
1531 return args->f.func_write(s, buf, num, &s->asyncrw);
1533 return args->f.func_other(s);
1538 int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1540 if (s->handshake_func == NULL) {
1541 SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED);
1545 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1546 s->rwstate = SSL_NOTHING;
1550 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1551 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
1552 SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1556 * If we are a client and haven't received the ServerHello etc then we
1559 ossl_statem_check_finish_init(s, 0);
1561 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1562 struct ssl_async_args args;
1568 args.type = READFUNC;
1569 args.f.func_read = s->method->ssl_read;
1571 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1572 *readbytes = s->asyncrw;
1575 return s->method->ssl_read(s, buf, num, readbytes);
1579 int SSL_read(SSL *s, void *buf, int num)
1585 SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH);
1589 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
1592 * The cast is safe here because ret should be <= INT_MAX because num is
1596 ret = (int)readbytes;
1601 int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1603 int ret = ssl_read_internal(s, buf, num, readbytes);
1610 int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
1615 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1616 return SSL_READ_EARLY_DATA_ERROR;
1619 switch (s->early_data_state) {
1620 case SSL_EARLY_DATA_NONE:
1621 if (!SSL_in_before(s)) {
1622 SSLerr(SSL_F_SSL_READ_EARLY_DATA,
1623 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1624 return SSL_READ_EARLY_DATA_ERROR;
1628 case SSL_EARLY_DATA_ACCEPT_RETRY:
1629 s->early_data_state = SSL_EARLY_DATA_ACCEPTING;
1630 ret = SSL_accept(s);
1633 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
1634 return SSL_READ_EARLY_DATA_ERROR;
1638 case SSL_EARLY_DATA_READ_RETRY:
1639 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
1640 s->early_data_state = SSL_EARLY_DATA_READING;
1641 ret = SSL_read_ex(s, buf, num, readbytes);
1643 * Record layer will call ssl_end_of_early_data_seen() if we see
1644 * that alert - which updates the early_data_state to
1645 * SSL_EARLY_DATA_FINISHED_READING
1647 if (ret > 0 || (ret <= 0 && s->early_data_state
1648 != SSL_EARLY_DATA_FINISHED_READING)) {
1649 s->early_data_state = SSL_EARLY_DATA_READ_RETRY;
1650 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
1651 : SSL_READ_EARLY_DATA_ERROR;
1654 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
1657 return SSL_READ_EARLY_DATA_FINISH;
1660 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1661 return SSL_READ_EARLY_DATA_ERROR;
1665 int ssl_end_of_early_data_seen(SSL *s)
1667 if (s->early_data_state == SSL_EARLY_DATA_READING
1668 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
1669 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
1670 ossl_statem_finish_early_data(s);
1677 int SSL_get_early_data_status(const SSL *s)
1679 return s->ext.early_data;
1682 static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1684 if (s->handshake_func == NULL) {
1685 SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED);
1689 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1692 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1693 struct ssl_async_args args;
1699 args.type = READFUNC;
1700 args.f.func_read = s->method->ssl_peek;
1702 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1703 *readbytes = s->asyncrw;
1706 return s->method->ssl_peek(s, buf, num, readbytes);
1710 int SSL_peek(SSL *s, void *buf, int num)
1716 SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH);
1720 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
1723 * The cast is safe here because ret should be <= INT_MAX because num is
1727 ret = (int)readbytes;
1733 int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1735 int ret = ssl_peek_internal(s, buf, num, readbytes);
1742 int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
1744 if (s->handshake_func == NULL) {
1745 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED);
1749 if (s->shutdown & SSL_SENT_SHUTDOWN) {
1750 s->rwstate = SSL_NOTHING;
1751 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN);
1755 if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY) {
1757 * We're still writing early data. We need to stop that so we can write
1760 if (!ssl_write_early_finish(s))
1762 } else if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1763 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
1764 SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1767 /* If we are a client and haven't sent the Finished we better do that */
1768 ossl_statem_check_finish_init(s, 1);
1770 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1772 struct ssl_async_args args;
1775 args.buf = (void *)buf;
1777 args.type = WRITEFUNC;
1778 args.f.func_write = s->method->ssl_write;
1780 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1781 *written = s->asyncrw;
1784 return s->method->ssl_write(s, buf, num, written);
1788 int SSL_write(SSL *s, const void *buf, int num)
1794 SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH);
1798 ret = ssl_write_internal(s, buf, (size_t)num, &written);
1801 * The cast is safe here because ret should be <= INT_MAX because num is
1810 int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
1812 int ret = ssl_write_internal(s, buf, num, written);
1819 int SSL_write_early(SSL *s, const void *buf, size_t num, size_t *written)
1824 SSLerr(SSL_F_SSL_WRITE_EARLY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1828 switch (s->early_data_state) {
1829 case SSL_EARLY_DATA_NONE:
1830 if (!SSL_in_before(s)
1831 || s->session == NULL
1832 || s->session->ext.max_early_data == 0) {
1833 SSLerr(SSL_F_SSL_WRITE_EARLY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1838 case SSL_EARLY_DATA_CONNECT_RETRY:
1839 s->early_data_state = SSL_EARLY_DATA_CONNECTING;
1840 ret = SSL_connect(s);
1843 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
1848 case SSL_EARLY_DATA_WRITE_RETRY:
1849 s->early_data_state = SSL_EARLY_DATA_WRITING;
1850 ret = SSL_write_ex(s, buf, num, written);
1851 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
1855 SSLerr(SSL_F_SSL_WRITE_EARLY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1860 static int ssl_write_early_finish(SSL *s)
1864 if (s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY) {
1865 SSLerr(SSL_F_SSL_WRITE_EARLY_FINISH, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1869 s->early_data_state = SSL_EARLY_DATA_WRITING;
1870 ret = ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_END_OF_EARLY_DATA);
1872 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
1875 s->early_data_state = SSL_EARLY_DATA_FINISHED_WRITING;
1877 * We set the enc_write_ctx back to NULL because we may end up writing
1878 * in cleartext again if we get a HelloRetryRequest from the server.
1880 EVP_CIPHER_CTX_free(s->enc_write_ctx);
1881 s->enc_write_ctx = NULL;
1882 ossl_statem_set_in_init(s, 1);
1886 int SSL_shutdown(SSL *s)
1889 * Note that this function behaves differently from what one might
1890 * expect. Return values are 0 for no success (yet), 1 for success; but
1891 * calling it once is usually not enough, even if blocking I/O is used
1892 * (see ssl3_shutdown).
1895 if (s->handshake_func == NULL) {
1896 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
1900 if (!SSL_in_init(s)) {
1901 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1902 struct ssl_async_args args;
1905 args.type = OTHERFUNC;
1906 args.f.func_other = s->method->ssl_shutdown;
1908 return ssl_start_async_job(s, &args, ssl_io_intern);
1910 return s->method->ssl_shutdown(s);
1913 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT);
1918 int SSL_key_update(SSL *s, int updatetype)
1921 * TODO(TLS1.3): How will applications know whether TLSv1.3 has been
1922 * negotiated, and that it is appropriate to call SSL_key_update() instead
1923 * of SSL_renegotiate().
1925 if (!SSL_IS_TLS13(s)) {
1926 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION);
1930 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
1931 && updatetype != SSL_KEY_UPDATE_REQUESTED) {
1932 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE);
1936 if (!SSL_is_init_finished(s)) {
1937 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT);
1941 ossl_statem_set_in_init(s, 1);
1942 s->key_update = updatetype;
1946 int SSL_get_key_update_type(SSL *s)
1948 return s->key_update;
1951 int SSL_renegotiate(SSL *s)
1953 if (SSL_IS_TLS13(s)) {
1954 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION);
1958 if (s->renegotiate == 0)
1963 return (s->method->ssl_renegotiate(s));
1966 int SSL_renegotiate_abbreviated(SSL *s)
1968 if (SSL_IS_TLS13(s))
1971 if (s->renegotiate == 0)
1976 return (s->method->ssl_renegotiate(s));
1979 int SSL_renegotiate_pending(SSL *s)
1982 * becomes true when negotiation is requested; false again once a
1983 * handshake has finished
1985 return (s->renegotiate != 0);
1988 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
1993 case SSL_CTRL_GET_READ_AHEAD:
1994 return (RECORD_LAYER_get_read_ahead(&s->rlayer));
1995 case SSL_CTRL_SET_READ_AHEAD:
1996 l = RECORD_LAYER_get_read_ahead(&s->rlayer);
1997 RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
2000 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2001 s->msg_callback_arg = parg;
2005 return (s->mode |= larg);
2006 case SSL_CTRL_CLEAR_MODE:
2007 return (s->mode &= ~larg);
2008 case SSL_CTRL_GET_MAX_CERT_LIST:
2009 return (long)(s->max_cert_list);
2010 case SSL_CTRL_SET_MAX_CERT_LIST:
2013 l = (long)s->max_cert_list;
2014 s->max_cert_list = (size_t)larg;
2016 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2017 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2019 s->max_send_fragment = larg;
2020 if (s->max_send_fragment < s->split_send_fragment)
2021 s->split_send_fragment = s->max_send_fragment;
2023 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2024 if ((size_t)larg > s->max_send_fragment || larg == 0)
2026 s->split_send_fragment = larg;
2028 case SSL_CTRL_SET_MAX_PIPELINES:
2029 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2031 s->max_pipelines = larg;
2033 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
2035 case SSL_CTRL_GET_RI_SUPPORT:
2037 return s->s3->send_connection_binding;
2040 case SSL_CTRL_CERT_FLAGS:
2041 return (s->cert->cert_flags |= larg);
2042 case SSL_CTRL_CLEAR_CERT_FLAGS:
2043 return (s->cert->cert_flags &= ~larg);
2045 case SSL_CTRL_GET_RAW_CIPHERLIST:
2047 if (s->s3->tmp.ciphers_raw == NULL)
2049 *(unsigned char **)parg = s->s3->tmp.ciphers_raw;
2050 return (int)s->s3->tmp.ciphers_rawlen;
2052 return TLS_CIPHER_LEN;
2054 case SSL_CTRL_GET_EXTMS_SUPPORT:
2055 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
2057 if (s->session->flags & SSL_SESS_FLAG_EXTMS)
2061 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2062 return ssl_set_version_bound(s->ctx->method->version, (int)larg,
2063 &s->min_proto_version);
2064 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2065 return ssl_set_version_bound(s->ctx->method->version, (int)larg,
2066 &s->max_proto_version);
2068 return (s->method->ssl_ctrl(s, cmd, larg, parg));
2072 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
2075 case SSL_CTRL_SET_MSG_CALLBACK:
2076 s->msg_callback = (void (*)
2077 (int write_p, int version, int content_type,
2078 const void *buf, size_t len, SSL *ssl,
2083 return (s->method->ssl_callback_ctrl(s, cmd, fp));
2087 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
2089 return ctx->sessions;
2092 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
2095 /* For some cases with ctx == NULL perform syntax checks */
2098 #ifndef OPENSSL_NO_EC
2099 case SSL_CTRL_SET_GROUPS_LIST:
2100 return tls1_set_groups_list(NULL, NULL, parg);
2102 case SSL_CTRL_SET_SIGALGS_LIST:
2103 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
2104 return tls1_set_sigalgs_list(NULL, parg, 0);
2111 case SSL_CTRL_GET_READ_AHEAD:
2112 return (ctx->read_ahead);
2113 case SSL_CTRL_SET_READ_AHEAD:
2114 l = ctx->read_ahead;
2115 ctx->read_ahead = larg;
2118 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2119 ctx->msg_callback_arg = parg;
2122 case SSL_CTRL_GET_MAX_CERT_LIST:
2123 return (long)(ctx->max_cert_list);
2124 case SSL_CTRL_SET_MAX_CERT_LIST:
2127 l = (long)ctx->max_cert_list;
2128 ctx->max_cert_list = (size_t)larg;
2131 case SSL_CTRL_SET_SESS_CACHE_SIZE:
2134 l = (long)ctx->session_cache_size;
2135 ctx->session_cache_size = (size_t)larg;
2137 case SSL_CTRL_GET_SESS_CACHE_SIZE:
2138 return (long)(ctx->session_cache_size);
2139 case SSL_CTRL_SET_SESS_CACHE_MODE:
2140 l = ctx->session_cache_mode;
2141 ctx->session_cache_mode = larg;
2143 case SSL_CTRL_GET_SESS_CACHE_MODE:
2144 return (ctx->session_cache_mode);
2146 case SSL_CTRL_SESS_NUMBER:
2147 return (lh_SSL_SESSION_num_items(ctx->sessions));
2148 case SSL_CTRL_SESS_CONNECT:
2149 return (ctx->stats.sess_connect);
2150 case SSL_CTRL_SESS_CONNECT_GOOD:
2151 return (ctx->stats.sess_connect_good);
2152 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
2153 return (ctx->stats.sess_connect_renegotiate);
2154 case SSL_CTRL_SESS_ACCEPT:
2155 return (ctx->stats.sess_accept);
2156 case SSL_CTRL_SESS_ACCEPT_GOOD:
2157 return (ctx->stats.sess_accept_good);
2158 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
2159 return (ctx->stats.sess_accept_renegotiate);
2160 case SSL_CTRL_SESS_HIT:
2161 return (ctx->stats.sess_hit);
2162 case SSL_CTRL_SESS_CB_HIT:
2163 return (ctx->stats.sess_cb_hit);
2164 case SSL_CTRL_SESS_MISSES:
2165 return (ctx->stats.sess_miss);
2166 case SSL_CTRL_SESS_TIMEOUTS:
2167 return (ctx->stats.sess_timeout);
2168 case SSL_CTRL_SESS_CACHE_FULL:
2169 return (ctx->stats.sess_cache_full);
2171 return (ctx->mode |= larg);
2172 case SSL_CTRL_CLEAR_MODE:
2173 return (ctx->mode &= ~larg);
2174 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2175 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2177 ctx->max_send_fragment = larg;
2178 if (ctx->max_send_fragment < ctx->split_send_fragment)
2179 ctx->split_send_fragment = ctx->max_send_fragment;
2181 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2182 if ((size_t)larg > ctx->max_send_fragment || larg == 0)
2184 ctx->split_send_fragment = larg;
2186 case SSL_CTRL_SET_MAX_PIPELINES:
2187 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2189 ctx->max_pipelines = larg;
2191 case SSL_CTRL_CERT_FLAGS:
2192 return (ctx->cert->cert_flags |= larg);
2193 case SSL_CTRL_CLEAR_CERT_FLAGS:
2194 return (ctx->cert->cert_flags &= ~larg);
2195 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2196 return ssl_set_version_bound(ctx->method->version, (int)larg,
2197 &ctx->min_proto_version);
2198 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2199 return ssl_set_version_bound(ctx->method->version, (int)larg,
2200 &ctx->max_proto_version);
2202 return (ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg));
2206 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
2209 case SSL_CTRL_SET_MSG_CALLBACK:
2210 ctx->msg_callback = (void (*)
2211 (int write_p, int version, int content_type,
2212 const void *buf, size_t len, SSL *ssl,
2217 return (ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp));
2221 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
2230 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
2231 const SSL_CIPHER *const *bp)
2233 if ((*ap)->id > (*bp)->id)
2235 if ((*ap)->id < (*bp)->id)
2240 /** return a STACK of the ciphers available for the SSL and in order of
2242 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
2245 if (s->cipher_list != NULL) {
2246 return (s->cipher_list);
2247 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
2248 return (s->ctx->cipher_list);
2254 STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
2256 if ((s == NULL) || (s->session == NULL) || !s->server)
2258 return s->session->ciphers;
2261 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
2263 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
2265 ciphers = SSL_get_ciphers(s);
2268 ssl_set_client_disabled(s);
2269 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
2270 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
2271 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) {
2273 sk = sk_SSL_CIPHER_new_null();
2276 if (!sk_SSL_CIPHER_push(sk, c)) {
2277 sk_SSL_CIPHER_free(sk);
2285 /** return a STACK of the ciphers available for the SSL and in order of
2287 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
2290 if (s->cipher_list_by_id != NULL) {
2291 return (s->cipher_list_by_id);
2292 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
2293 return (s->ctx->cipher_list_by_id);
2299 /** The old interface to get the same thing as SSL_get_ciphers() */
2300 const char *SSL_get_cipher_list(const SSL *s, int n)
2302 const SSL_CIPHER *c;
2303 STACK_OF(SSL_CIPHER) *sk;
2307 sk = SSL_get_ciphers(s);
2308 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
2310 c = sk_SSL_CIPHER_value(sk, n);
2316 /** return a STACK of the ciphers available for the SSL_CTX and in order of
2318 STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
2321 return ctx->cipher_list;
2325 /** specify the ciphers to be used by default by the SSL_CTX */
2326 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
2328 STACK_OF(SSL_CIPHER) *sk;
2330 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list,
2331 &ctx->cipher_list_by_id, str, ctx->cert);
2333 * ssl_create_cipher_list may return an empty stack if it was unable to
2334 * find a cipher matching the given rule string (for example if the rule
2335 * string specifies a cipher which has been disabled). This is not an
2336 * error as far as ssl_create_cipher_list is concerned, and hence
2337 * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
2341 else if (sk_SSL_CIPHER_num(sk) == 0) {
2342 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2348 /** specify the ciphers to be used by the SSL */
2349 int SSL_set_cipher_list(SSL *s, const char *str)
2351 STACK_OF(SSL_CIPHER) *sk;
2353 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list,
2354 &s->cipher_list_by_id, str, s->cert);
2355 /* see comment in SSL_CTX_set_cipher_list */
2358 else if (sk_SSL_CIPHER_num(sk) == 0) {
2359 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2365 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len)
2368 STACK_OF(SSL_CIPHER) *sk;
2369 const SSL_CIPHER *c;
2372 if ((s->session == NULL) || (s->session->ciphers == NULL) || (len < 2))
2376 sk = s->session->ciphers;
2378 if (sk_SSL_CIPHER_num(sk) == 0)
2381 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
2384 c = sk_SSL_CIPHER_value(sk, i);
2385 n = strlen(c->name);
2392 memcpy(p, c->name, n + 1);
2401 /** return a servername extension value if provided in Client Hello, or NULL.
2402 * So far, only host_name types are defined (RFC 3546).
2405 const char *SSL_get_servername(const SSL *s, const int type)
2407 if (type != TLSEXT_NAMETYPE_host_name)
2410 return s->session && !s->ext.hostname ?
2411 s->session->ext.hostname : s->ext.hostname;
2414 int SSL_get_servername_type(const SSL *s)
2417 && (!s->ext.hostname ? s->session->
2418 ext.hostname : s->ext.hostname))
2419 return TLSEXT_NAMETYPE_host_name;
2424 * SSL_select_next_proto implements the standard protocol selection. It is
2425 * expected that this function is called from the callback set by
2426 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
2427 * vector of 8-bit, length prefixed byte strings. The length byte itself is
2428 * not included in the length. A byte string of length 0 is invalid. No byte
2429 * string may be truncated. The current, but experimental algorithm for
2430 * selecting the protocol is: 1) If the server doesn't support NPN then this
2431 * is indicated to the callback. In this case, the client application has to
2432 * abort the connection or have a default application level protocol. 2) If
2433 * the server supports NPN, but advertises an empty list then the client
2434 * selects the first protocol in its list, but indicates via the API that this
2435 * fallback case was enacted. 3) Otherwise, the client finds the first
2436 * protocol in the server's list that it supports and selects this protocol.
2437 * This is because it's assumed that the server has better information about
2438 * which protocol a client should use. 4) If the client doesn't support any
2439 * of the server's advertised protocols, then this is treated the same as
2440 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
2441 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
2443 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
2444 const unsigned char *server,
2445 unsigned int server_len,
2446 const unsigned char *client, unsigned int client_len)
2449 const unsigned char *result;
2450 int status = OPENSSL_NPN_UNSUPPORTED;
2453 * For each protocol in server preference order, see if we support it.
2455 for (i = 0; i < server_len;) {
2456 for (j = 0; j < client_len;) {
2457 if (server[i] == client[j] &&
2458 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
2459 /* We found a match */
2460 result = &server[i];
2461 status = OPENSSL_NPN_NEGOTIATED;
2471 /* There's no overlap between our protocols and the server's list. */
2473 status = OPENSSL_NPN_NO_OVERLAP;
2476 *out = (unsigned char *)result + 1;
2477 *outlen = result[0];
2481 #ifndef OPENSSL_NO_NEXTPROTONEG
2483 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
2484 * client's requested protocol for this connection and returns 0. If the
2485 * client didn't request any protocol, then *data is set to NULL. Note that
2486 * the client can request any protocol it chooses. The value returned from
2487 * this function need not be a member of the list of supported protocols
2488 * provided by the callback.
2490 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
2497 *len = (unsigned int)s->ext.npn_len;
2502 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
2503 * a TLS server needs a list of supported protocols for Next Protocol
2504 * Negotiation. The returned list must be in wire format. The list is
2505 * returned by setting |out| to point to it and |outlen| to its length. This
2506 * memory will not be modified, but one should assume that the SSL* keeps a
2507 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
2508 * wishes to advertise. Otherwise, no such extension will be included in the
2511 void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
2512 SSL_CTX_npn_advertised_cb_func cb,
2515 ctx->ext.npn_advertised_cb = cb;
2516 ctx->ext.npn_advertised_cb_arg = arg;
2520 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
2521 * client needs to select a protocol from the server's provided list. |out|
2522 * must be set to point to the selected protocol (which may be within |in|).
2523 * The length of the protocol name must be written into |outlen|. The
2524 * server's advertised protocols are provided in |in| and |inlen|. The
2525 * callback can assume that |in| is syntactically valid. The client must
2526 * select a protocol. It is fatal to the connection if this callback returns
2527 * a value other than SSL_TLSEXT_ERR_OK.
2529 void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
2530 SSL_CTX_npn_select_cb_func cb,
2533 ctx->ext.npn_select_cb = cb;
2534 ctx->ext.npn_select_cb_arg = arg;
2539 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
2540 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2541 * length-prefixed strings). Returns 0 on success.
2543 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
2544 unsigned int protos_len)
2546 OPENSSL_free(ctx->ext.alpn);
2547 ctx->ext.alpn = OPENSSL_memdup(protos, protos_len);
2548 if (ctx->ext.alpn == NULL) {
2549 SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2552 ctx->ext.alpn_len = protos_len;
2558 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
2559 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2560 * length-prefixed strings). Returns 0 on success.
2562 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
2563 unsigned int protos_len)
2565 OPENSSL_free(ssl->ext.alpn);
2566 ssl->ext.alpn = OPENSSL_memdup(protos, protos_len);
2567 if (ssl->ext.alpn == NULL) {
2568 SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2571 ssl->ext.alpn_len = protos_len;
2577 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
2578 * called during ClientHello processing in order to select an ALPN protocol
2579 * from the client's list of offered protocols.
2581 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
2582 SSL_CTX_alpn_select_cb_func cb,
2585 ctx->ext.alpn_select_cb = cb;
2586 ctx->ext.alpn_select_cb_arg = arg;
2590 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from
2591 * |ssl|. On return it sets |*data| to point to |*len| bytes of protocol name
2592 * (not including the leading length-prefix byte). If the server didn't
2593 * respond with a negotiated protocol then |*len| will be zero.
2595 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
2600 *data = ssl->s3->alpn_selected;
2604 *len = (unsigned int)ssl->s3->alpn_selected_len;
2607 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
2608 const char *label, size_t llen,
2609 const unsigned char *p, size_t plen,
2612 if (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER)
2615 return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
2620 static unsigned long ssl_session_hash(const SSL_SESSION *a)
2622 const unsigned char *session_id = a->session_id;
2624 unsigned char tmp_storage[4];
2626 if (a->session_id_length < sizeof(tmp_storage)) {
2627 memset(tmp_storage, 0, sizeof(tmp_storage));
2628 memcpy(tmp_storage, a->session_id, a->session_id_length);
2629 session_id = tmp_storage;
2633 ((unsigned long)session_id[0]) |
2634 ((unsigned long)session_id[1] << 8L) |
2635 ((unsigned long)session_id[2] << 16L) |
2636 ((unsigned long)session_id[3] << 24L);
2641 * NB: If this function (or indeed the hash function which uses a sort of
2642 * coarser function than this one) is changed, ensure
2643 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
2644 * being able to construct an SSL_SESSION that will collide with any existing
2645 * session with a matching session ID.
2647 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
2649 if (a->ssl_version != b->ssl_version)
2651 if (a->session_id_length != b->session_id_length)
2653 return (memcmp(a->session_id, b->session_id, a->session_id_length));
2657 * These wrapper functions should remain rather than redeclaring
2658 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
2659 * variable. The reason is that the functions aren't static, they're exposed
2663 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
2665 SSL_CTX *ret = NULL;
2668 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED);
2672 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
2675 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
2676 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
2679 ret = OPENSSL_zalloc(sizeof(*ret));
2684 ret->min_proto_version = 0;
2685 ret->max_proto_version = 0;
2686 ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
2687 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
2688 /* We take the system default. */
2689 ret->session_timeout = meth->get_timeout();
2690 ret->references = 1;
2691 ret->lock = CRYPTO_THREAD_lock_new();
2692 if (ret->lock == NULL) {
2693 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
2697 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
2698 ret->verify_mode = SSL_VERIFY_NONE;
2699 if ((ret->cert = ssl_cert_new()) == NULL)
2702 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
2703 if (ret->sessions == NULL)
2705 ret->cert_store = X509_STORE_new();
2706 if (ret->cert_store == NULL)
2708 #ifndef OPENSSL_NO_CT
2709 ret->ctlog_store = CTLOG_STORE_new();
2710 if (ret->ctlog_store == NULL)
2713 if (!ssl_create_cipher_list(ret->method,
2714 &ret->cipher_list, &ret->cipher_list_by_id,
2715 SSL_DEFAULT_CIPHER_LIST, ret->cert)
2716 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
2717 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS);
2721 ret->param = X509_VERIFY_PARAM_new();
2722 if (ret->param == NULL)
2725 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
2726 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
2729 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) {
2730 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
2734 if ((ret->client_CA = sk_X509_NAME_new_null()) == NULL)
2737 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
2740 /* No compression for DTLS */
2741 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
2742 ret->comp_methods = SSL_COMP_get_compression_methods();
2744 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2745 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2747 /* Setup RFC5077 ticket keys */
2748 if ((RAND_bytes(ret->ext.tick_key_name,
2749 sizeof(ret->ext.tick_key_name)) <= 0)
2750 || (RAND_bytes(ret->ext.tick_hmac_key,
2751 sizeof(ret->ext.tick_hmac_key)) <= 0)
2752 || (RAND_bytes(ret->ext.tick_aes_key,
2753 sizeof(ret->ext.tick_aes_key)) <= 0))
2754 ret->options |= SSL_OP_NO_TICKET;
2756 #ifndef OPENSSL_NO_SRP
2757 if (!SSL_CTX_SRP_CTX_init(ret))
2760 #ifndef OPENSSL_NO_ENGINE
2761 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2762 # define eng_strx(x) #x
2763 # define eng_str(x) eng_strx(x)
2764 /* Use specific client engine automatically... ignore errors */
2767 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2770 ENGINE_load_builtin_engines();
2771 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2773 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2779 * Default is to connect to non-RI servers. When RI is more widely
2780 * deployed might change this.
2782 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2784 * Disable compression by default to prevent CRIME. Applications can
2785 * re-enable compression by configuring
2786 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
2787 * or by using the SSL_CONF library.
2789 ret->options |= SSL_OP_NO_COMPRESSION;
2791 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
2794 * Default max early data is a fully loaded single record. Could be split
2795 * across multiple records in practice
2797 ret->max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
2801 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
2807 int SSL_CTX_up_ref(SSL_CTX *ctx)
2811 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
2814 REF_PRINT_COUNT("SSL_CTX", ctx);
2815 REF_ASSERT_ISNT(i < 2);
2816 return ((i > 1) ? 1 : 0);
2819 void SSL_CTX_free(SSL_CTX *a)
2826 CRYPTO_DOWN_REF(&a->references, &i, a->lock);
2827 REF_PRINT_COUNT("SSL_CTX", a);
2830 REF_ASSERT_ISNT(i < 0);
2832 X509_VERIFY_PARAM_free(a->param);
2833 dane_ctx_final(&a->dane);
2836 * Free internal session cache. However: the remove_cb() may reference
2837 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
2838 * after the sessions were flushed.
2839 * As the ex_data handling routines might also touch the session cache,
2840 * the most secure solution seems to be: empty (flush) the cache, then
2841 * free ex_data, then finally free the cache.
2842 * (See ticket [openssl.org #212].)
2844 if (a->sessions != NULL)
2845 SSL_CTX_flush_sessions(a, 0);
2847 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
2848 lh_SSL_SESSION_free(a->sessions);
2849 X509_STORE_free(a->cert_store);
2850 #ifndef OPENSSL_NO_CT
2851 CTLOG_STORE_free(a->ctlog_store);
2853 sk_SSL_CIPHER_free(a->cipher_list);
2854 sk_SSL_CIPHER_free(a->cipher_list_by_id);
2855 ssl_cert_free(a->cert);
2856 sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free);
2857 sk_X509_pop_free(a->extra_certs, X509_free);
2858 a->comp_methods = NULL;
2859 #ifndef OPENSSL_NO_SRTP
2860 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
2862 #ifndef OPENSSL_NO_SRP
2863 SSL_CTX_SRP_CTX_free(a);
2865 #ifndef OPENSSL_NO_ENGINE
2866 ENGINE_finish(a->client_cert_engine);
2869 #ifndef OPENSSL_NO_EC
2870 OPENSSL_free(a->ext.ecpointformats);
2871 OPENSSL_free(a->ext.supportedgroups);
2873 OPENSSL_free(a->ext.alpn);
2875 CRYPTO_THREAD_lock_free(a->lock);
2880 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
2882 ctx->default_passwd_callback = cb;
2885 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
2887 ctx->default_passwd_callback_userdata = u;
2890 pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
2892 return ctx->default_passwd_callback;
2895 void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
2897 return ctx->default_passwd_callback_userdata;
2900 void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
2902 s->default_passwd_callback = cb;
2905 void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
2907 s->default_passwd_callback_userdata = u;
2910 pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
2912 return s->default_passwd_callback;
2915 void *SSL_get_default_passwd_cb_userdata(SSL *s)
2917 return s->default_passwd_callback_userdata;
2920 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
2921 int (*cb) (X509_STORE_CTX *, void *),
2924 ctx->app_verify_callback = cb;
2925 ctx->app_verify_arg = arg;
2928 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
2929 int (*cb) (int, X509_STORE_CTX *))
2931 ctx->verify_mode = mode;
2932 ctx->default_verify_callback = cb;
2935 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
2937 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
2940 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
2942 ssl_cert_set_cert_cb(c->cert, cb, arg);
2945 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
2947 ssl_cert_set_cert_cb(s->cert, cb, arg);
2950 void ssl_set_masks(SSL *s)
2953 uint32_t *pvalid = s->s3->tmp.valid_flags;
2954 int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
2955 unsigned long mask_k, mask_a;
2956 #ifndef OPENSSL_NO_EC
2957 int have_ecc_cert, ecdsa_ok;
2962 #ifndef OPENSSL_NO_DH
2963 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
2968 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
2969 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
2970 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
2971 #ifndef OPENSSL_NO_EC
2972 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
2978 fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n",
2979 dh_tmp, rsa_enc, rsa_sign, dsa_sign);
2982 #ifndef OPENSSL_NO_GOST
2983 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
2984 mask_k |= SSL_kGOST;
2985 mask_a |= SSL_aGOST12;
2987 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
2988 mask_k |= SSL_kGOST;
2989 mask_a |= SSL_aGOST12;
2991 if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
2992 mask_k |= SSL_kGOST;
2993 mask_a |= SSL_aGOST01;
3003 if (rsa_enc || rsa_sign) {
3011 mask_a |= SSL_aNULL;
3014 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
3015 * depending on the key usage extension.
3017 #ifndef OPENSSL_NO_EC
3018 if (have_ecc_cert) {
3020 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
3021 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
3022 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
3025 mask_a |= SSL_aECDSA;
3029 #ifndef OPENSSL_NO_EC
3030 mask_k |= SSL_kECDHE;
3033 #ifndef OPENSSL_NO_PSK
3036 if (mask_k & SSL_kRSA)
3037 mask_k |= SSL_kRSAPSK;
3038 if (mask_k & SSL_kDHE)
3039 mask_k |= SSL_kDHEPSK;
3040 if (mask_k & SSL_kECDHE)
3041 mask_k |= SSL_kECDHEPSK;
3044 s->s3->tmp.mask_k = mask_k;
3045 s->s3->tmp.mask_a = mask_a;
3048 #ifndef OPENSSL_NO_EC
3050 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
3052 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
3053 /* key usage, if present, must allow signing */
3054 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
3055 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
3056 SSL_R_ECC_CERT_NOT_FOR_SIGNING);
3060 return 1; /* all checks are ok */
3065 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
3066 size_t *serverinfo_length)
3068 CERT_PKEY *cpk = s->s3->tmp.cert;
3069 *serverinfo_length = 0;
3071 if (cpk == NULL || cpk->serverinfo == NULL)
3074 *serverinfo = cpk->serverinfo;
3075 *serverinfo_length = cpk->serverinfo_length;
3079 void ssl_update_cache(SSL *s, int mode)
3084 * If the session_id_length is 0, we are not supposed to cache it, and it
3085 * would be rather hard to do anyway :-)
3087 if (s->session->session_id_length == 0)
3090 i = s->session_ctx->session_cache_mode;
3091 if ((i & mode) && (!s->hit)
3092 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
3093 || SSL_CTX_add_session(s->session_ctx, s->session))
3094 && (s->session_ctx->new_session_cb != NULL)) {
3095 SSL_SESSION_up_ref(s->session);
3096 if (!s->session_ctx->new_session_cb(s, s->session))
3097 SSL_SESSION_free(s->session);
3100 /* auto flush every 255 connections */
3101 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
3102 if ((((mode & SSL_SESS_CACHE_CLIENT)
3103 ? s->session_ctx->stats.sess_connect_good
3104 : s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff) {
3105 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
3110 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
3115 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
3120 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
3124 if (s->method != meth) {
3125 const SSL_METHOD *sm = s->method;
3126 int (*hf) (SSL *) = s->handshake_func;
3128 if (sm->version == meth->version)
3133 ret = s->method->ssl_new(s);
3136 if (hf == sm->ssl_connect)
3137 s->handshake_func = meth->ssl_connect;
3138 else if (hf == sm->ssl_accept)
3139 s->handshake_func = meth->ssl_accept;
3144 int SSL_get_error(const SSL *s, int i)
3151 return (SSL_ERROR_NONE);
3154 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
3155 * where we do encode the error
3157 if ((l = ERR_peek_error()) != 0) {
3158 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
3159 return (SSL_ERROR_SYSCALL);
3161 return (SSL_ERROR_SSL);
3164 if (SSL_want_read(s)) {
3165 bio = SSL_get_rbio(s);
3166 if (BIO_should_read(bio))
3167 return (SSL_ERROR_WANT_READ);
3168 else if (BIO_should_write(bio))
3170 * This one doesn't make too much sense ... We never try to write
3171 * to the rbio, and an application program where rbio and wbio
3172 * are separate couldn't even know what it should wait for.
3173 * However if we ever set s->rwstate incorrectly (so that we have
3174 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
3175 * wbio *are* the same, this test works around that bug; so it
3176 * might be safer to keep it.
3178 return (SSL_ERROR_WANT_WRITE);
3179 else if (BIO_should_io_special(bio)) {
3180 reason = BIO_get_retry_reason(bio);
3181 if (reason == BIO_RR_CONNECT)
3182 return (SSL_ERROR_WANT_CONNECT);
3183 else if (reason == BIO_RR_ACCEPT)
3184 return (SSL_ERROR_WANT_ACCEPT);
3186 return (SSL_ERROR_SYSCALL); /* unknown */
3190 if (SSL_want_write(s)) {
3192 * Access wbio directly - in order to use the buffered bio if
3196 if (BIO_should_write(bio))
3197 return (SSL_ERROR_WANT_WRITE);
3198 else if (BIO_should_read(bio))
3200 * See above (SSL_want_read(s) with BIO_should_write(bio))
3202 return (SSL_ERROR_WANT_READ);
3203 else if (BIO_should_io_special(bio)) {
3204 reason = BIO_get_retry_reason(bio);
3205 if (reason == BIO_RR_CONNECT)
3206 return (SSL_ERROR_WANT_CONNECT);
3207 else if (reason == BIO_RR_ACCEPT)
3208 return (SSL_ERROR_WANT_ACCEPT);
3210 return (SSL_ERROR_SYSCALL);
3213 if (SSL_want_x509_lookup(s))
3214 return (SSL_ERROR_WANT_X509_LOOKUP);
3215 if (SSL_want_async(s))
3216 return SSL_ERROR_WANT_ASYNC;
3217 if (SSL_want_async_job(s))
3218 return SSL_ERROR_WANT_ASYNC_JOB;
3219 if (SSL_want_early(s))
3220 return SSL_ERROR_WANT_EARLY;
3222 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
3223 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
3224 return (SSL_ERROR_ZERO_RETURN);
3226 return (SSL_ERROR_SYSCALL);
3229 static int ssl_do_handshake_intern(void *vargs)
3231 struct ssl_async_args *args;
3234 args = (struct ssl_async_args *)vargs;
3237 return s->handshake_func(s);
3240 int SSL_do_handshake(SSL *s)
3244 if (s->handshake_func == NULL) {
3245 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET);
3249 if (s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY) {
3252 edfin = ssl_write_early_finish(s);
3256 ossl_statem_check_finish_init(s, -1);
3258 s->method->ssl_renegotiate_check(s, 0);
3260 if (SSL_in_init(s) || SSL_in_before(s)) {
3261 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
3262 struct ssl_async_args args;
3266 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
3268 ret = s->handshake_func(s);
3274 void SSL_set_accept_state(SSL *s)
3278 ossl_statem_clear(s);
3279 s->handshake_func = s->method->ssl_accept;
3283 void SSL_set_connect_state(SSL *s)
3287 ossl_statem_clear(s);
3288 s->handshake_func = s->method->ssl_connect;
3292 int ssl_undefined_function(SSL *s)
3294 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3298 int ssl_undefined_void_function(void)
3300 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
3301 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3305 int ssl_undefined_const_function(const SSL *s)
3310 const SSL_METHOD *ssl_bad_method(int ver)
3312 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3316 const char *ssl_protocol_to_string(int version)
3320 case TLS1_3_VERSION:
3323 case TLS1_2_VERSION:
3326 case TLS1_1_VERSION:
3341 case DTLS1_2_VERSION:
3349 const char *SSL_get_version(const SSL *s)
3351 return ssl_protocol_to_string(s->version);
3354 SSL *SSL_dup(SSL *s)
3356 STACK_OF(X509_NAME) *sk;
3361 /* If we're not quiescent, just up_ref! */
3362 if (!SSL_in_init(s) || !SSL_in_before(s)) {
3363 CRYPTO_UP_REF(&s->references, &i, s->lock);
3368 * Otherwise, copy configuration state, and session if set.
3370 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
3373 if (s->session != NULL) {
3375 * Arranges to share the same session via up_ref. This "copies"
3376 * session-id, SSL_METHOD, sid_ctx, and 'cert'
3378 if (!SSL_copy_session_id(ret, s))
3382 * No session has been established yet, so we have to expect that
3383 * s->cert or ret->cert will be changed later -- they should not both
3384 * point to the same object, and thus we can't use
3385 * SSL_copy_session_id.
3387 if (!SSL_set_ssl_method(ret, s->method))
3390 if (s->cert != NULL) {
3391 ssl_cert_free(ret->cert);
3392 ret->cert = ssl_cert_dup(s->cert);
3393 if (ret->cert == NULL)
3397 if (!SSL_set_session_id_context(ret, s->sid_ctx,
3398 (int)s->sid_ctx_length))
3402 if (!ssl_dane_dup(ret, s))
3404 ret->version = s->version;
3405 ret->options = s->options;
3406 ret->mode = s->mode;
3407 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
3408 SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
3409 ret->msg_callback = s->msg_callback;
3410 ret->msg_callback_arg = s->msg_callback_arg;
3411 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
3412 SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
3413 ret->generate_session_id = s->generate_session_id;
3415 SSL_set_info_callback(ret, SSL_get_info_callback(s));
3417 /* copy app data, a little dangerous perhaps */
3418 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
3421 /* setup rbio, and wbio */
3422 if (s->rbio != NULL) {
3423 if (!BIO_dup_state(s->rbio, (char *)&ret->rbio))
3426 if (s->wbio != NULL) {
3427 if (s->wbio != s->rbio) {
3428 if (!BIO_dup_state(s->wbio, (char *)&ret->wbio))
3431 BIO_up_ref(ret->rbio);
3432 ret->wbio = ret->rbio;
3436 ret->server = s->server;
3437 if (s->handshake_func) {
3439 SSL_set_accept_state(ret);
3441 SSL_set_connect_state(ret);
3443 ret->shutdown = s->shutdown;
3446 ret->default_passwd_callback = s->default_passwd_callback;
3447 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;
3449 X509_VERIFY_PARAM_inherit(ret->param, s->param);
3451 /* dup the cipher_list and cipher_list_by_id stacks */
3452 if (s->cipher_list != NULL) {
3453 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
3456 if (s->cipher_list_by_id != NULL)
3457 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id))
3461 /* Dup the client_CA list */
3462 if (s->client_CA != NULL) {
3463 if ((sk = sk_X509_NAME_dup(s->client_CA)) == NULL)
3465 ret->client_CA = sk;
3466 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
3467 xn = sk_X509_NAME_value(sk, i);
3468 if (sk_X509_NAME_set(sk, i, X509_NAME_dup(xn)) == NULL) {
3481 void ssl_clear_cipher_ctx(SSL *s)
3483 if (s->enc_read_ctx != NULL) {
3484 EVP_CIPHER_CTX_free(s->enc_read_ctx);
3485 s->enc_read_ctx = NULL;
3487 if (s->enc_write_ctx != NULL) {
3488 EVP_CIPHER_CTX_free(s->enc_write_ctx);
3489 s->enc_write_ctx = NULL;
3491 #ifndef OPENSSL_NO_COMP
3492 COMP_CTX_free(s->expand);
3494 COMP_CTX_free(s->compress);
3499 X509 *SSL_get_certificate(const SSL *s)
3501 if (s->cert != NULL)
3502 return (s->cert->key->x509);
3507 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3509 if (s->cert != NULL)
3510 return (s->cert->key->privatekey);
3515 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3517 if (ctx->cert != NULL)
3518 return ctx->cert->key->x509;
3523 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3525 if (ctx->cert != NULL)
3526 return ctx->cert->key->privatekey;
3531 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3533 if ((s->session != NULL) && (s->session->cipher != NULL))
3534 return (s->session->cipher);
3538 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3540 #ifndef OPENSSL_NO_COMP
3541 return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
3547 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3549 #ifndef OPENSSL_NO_COMP
3550 return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
3556 int ssl_init_wbio_buffer(SSL *s)
3560 if (s->bbio != NULL) {
3561 /* Already buffered. */
3565 bbio = BIO_new(BIO_f_buffer());
3566 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) {
3568 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB);
3572 s->wbio = BIO_push(bbio, s->wbio);
3577 void ssl_free_wbio_buffer(SSL *s)
3579 /* callers ensure s is never null */
3580 if (s->bbio == NULL)
3583 s->wbio = BIO_pop(s->wbio);
3584 assert(s->wbio != NULL);
3589 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
3591 ctx->quiet_shutdown = mode;
3594 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3596 return (ctx->quiet_shutdown);
3599 void SSL_set_quiet_shutdown(SSL *s, int mode)
3601 s->quiet_shutdown = mode;
3604 int SSL_get_quiet_shutdown(const SSL *s)
3606 return (s->quiet_shutdown);
3609 void SSL_set_shutdown(SSL *s, int mode)
3614 int SSL_get_shutdown(const SSL *s)
3619 int SSL_version(const SSL *s)
3624 int SSL_client_version(const SSL *s)
3626 return s->client_version;
3629 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3634 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
3637 if (ssl->ctx == ctx)
3640 ctx = ssl->session_ctx;
3641 new_cert = ssl_cert_dup(ctx->cert);
3642 if (new_cert == NULL) {
3645 ssl_cert_free(ssl->cert);
3646 ssl->cert = new_cert;
3649 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
3650 * so setter APIs must prevent invalid lengths from entering the system.
3652 OPENSSL_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx));
3655 * If the session ID context matches that of the parent SSL_CTX,
3656 * inherit it from the new SSL_CTX as well. If however the context does
3657 * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
3658 * leave it unchanged.
3660 if ((ssl->ctx != NULL) &&
3661 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
3662 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) {
3663 ssl->sid_ctx_length = ctx->sid_ctx_length;
3664 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
3667 SSL_CTX_up_ref(ctx);
3668 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3674 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3676 return (X509_STORE_set_default_paths(ctx->cert_store));
3679 int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
3681 X509_LOOKUP *lookup;
3683 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
3686 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
3688 /* Clear any errors if the default directory does not exist */
3694 int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
3696 X509_LOOKUP *lookup;
3698 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
3702 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
3704 /* Clear any errors if the default file does not exist */
3710 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3713 return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath));
3716 void SSL_set_info_callback(SSL *ssl,
3717 void (*cb) (const SSL *ssl, int type, int val))
3719 ssl->info_callback = cb;
3723 * One compiler (Diab DCC) doesn't like argument names in returned function
3726 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
3729 return ssl->info_callback;
3732 void SSL_set_verify_result(SSL *ssl, long arg)
3734 ssl->verify_result = arg;
3737 long SSL_get_verify_result(const SSL *ssl)
3739 return (ssl->verify_result);
3742 size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
3745 return sizeof(ssl->s3->client_random);
3746 if (outlen > sizeof(ssl->s3->client_random))
3747 outlen = sizeof(ssl->s3->client_random);
3748 memcpy(out, ssl->s3->client_random, outlen);
3752 size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
3755 return sizeof(ssl->s3->server_random);
3756 if (outlen > sizeof(ssl->s3->server_random))
3757 outlen = sizeof(ssl->s3->server_random);
3758 memcpy(out, ssl->s3->server_random, outlen);
3762 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
3763 unsigned char *out, size_t outlen)
3766 return session->master_key_length;
3767 if (outlen > session->master_key_length)
3768 outlen = session->master_key_length;
3769 memcpy(out, session->master_key, outlen);
3773 int SSL_set_ex_data(SSL *s, int idx, void *arg)
3775 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
3778 void *SSL_get_ex_data(const SSL *s, int idx)
3780 return (CRYPTO_get_ex_data(&s->ex_data, idx));
3783 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
3785 return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
3788 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
3790 return (CRYPTO_get_ex_data(&s->ex_data, idx));
3793 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
3795 return (ctx->cert_store);
3798 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
3800 X509_STORE_free(ctx->cert_store);
3801 ctx->cert_store = store;
3804 void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
3807 X509_STORE_up_ref(store);
3808 SSL_CTX_set_cert_store(ctx, store);
3811 int SSL_want(const SSL *s)
3813 return (s->rwstate);
3817 * \brief Set the callback for generating temporary DH keys.
3818 * \param ctx the SSL context.
3819 * \param dh the callback
3822 #ifndef OPENSSL_NO_DH
3823 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
3824 DH *(*dh) (SSL *ssl, int is_export,
3827 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
3830 void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export,
3833 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
3837 #ifndef OPENSSL_NO_PSK
3838 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
3840 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
3841 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3844 OPENSSL_free(ctx->cert->psk_identity_hint);
3845 if (identity_hint != NULL) {
3846 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
3847 if (ctx->cert->psk_identity_hint == NULL)
3850 ctx->cert->psk_identity_hint = NULL;
3854 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
3859 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
3860 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
3863 OPENSSL_free(s->cert->psk_identity_hint);
3864 if (identity_hint != NULL) {
3865 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
3866 if (s->cert->psk_identity_hint == NULL)
3869 s->cert->psk_identity_hint = NULL;
3873 const char *SSL_get_psk_identity_hint(const SSL *s)
3875 if (s == NULL || s->session == NULL)
3877 return (s->session->psk_identity_hint);
3880 const char *SSL_get_psk_identity(const SSL *s)
3882 if (s == NULL || s->session == NULL)
3884 return (s->session->psk_identity);
3887 void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
3889 s->psk_client_callback = cb;
3892 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
3894 ctx->psk_client_callback = cb;
3897 void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
3899 s->psk_server_callback = cb;
3902 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
3904 ctx->psk_server_callback = cb;
3908 void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
3909 void (*cb) (int write_p, int version,
3910 int content_type, const void *buf,
3911 size_t len, SSL *ssl, void *arg))
3913 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3916 void SSL_set_msg_callback(SSL *ssl,
3917 void (*cb) (int write_p, int version,
3918 int content_type, const void *buf,
3919 size_t len, SSL *ssl, void *arg))
3921 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
3924 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
3925 int (*cb) (SSL *ssl,
3929 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3930 (void (*)(void))cb);
3933 void SSL_set_not_resumable_session_callback(SSL *ssl,
3934 int (*cb) (SSL *ssl,
3935 int is_forward_secure))
3937 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
3938 (void (*)(void))cb);
3942 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
3943 * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
3944 * If EVP_MD pointer is passed, initializes ctx with this md.
3945 * Returns the newly allocated ctx;
3948 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
3950 ssl_clear_hash_ctx(hash);
3951 *hash = EVP_MD_CTX_new();
3952 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
3953 EVP_MD_CTX_free(*hash);
3960 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
3963 EVP_MD_CTX_free(*hash);
3967 /* Retrieve handshake hashes */
3968 int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
3971 EVP_MD_CTX *ctx = NULL;
3972 EVP_MD_CTX *hdgst = s->s3->handshake_dgst;
3973 int hashleni = EVP_MD_CTX_size(hdgst);
3976 if (hashleni < 0 || (size_t)hashleni > outlen)
3979 ctx = EVP_MD_CTX_new();
3983 if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
3984 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0)
3987 *hashlen = hashleni;
3991 EVP_MD_CTX_free(ctx);
3995 int SSL_session_reused(SSL *s)
4000 int SSL_is_server(SSL *s)
4005 #if OPENSSL_API_COMPAT < 0x10100000L
4006 void SSL_set_debug(SSL *s, int debug)
4008 /* Old function was do-nothing anyway... */
4014 void SSL_set_security_level(SSL *s, int level)
4016 s->cert->sec_level = level;
4019 int SSL_get_security_level(const SSL *s)
4021 return s->cert->sec_level;
4024 void SSL_set_security_callback(SSL *s,
4025 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4026 int op, int bits, int nid,
4027 void *other, void *ex))
4029 s->cert->sec_cb = cb;
4032 int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
4033 const SSL_CTX *ctx, int op,
4034 int bits, int nid, void *other,
4036 return s->cert->sec_cb;
4039 void SSL_set0_security_ex_data(SSL *s, void *ex)
4041 s->cert->sec_ex = ex;
4044 void *SSL_get0_security_ex_data(const SSL *s)
4046 return s->cert->sec_ex;
4049 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
4051 ctx->cert->sec_level = level;
4054 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
4056 return ctx->cert->sec_level;
4059 void SSL_CTX_set_security_callback(SSL_CTX *ctx,
4060 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4061 int op, int bits, int nid,
4062 void *other, void *ex))
4064 ctx->cert->sec_cb = cb;
4067 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
4073 return ctx->cert->sec_cb;
4076 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
4078 ctx->cert->sec_ex = ex;
4081 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
4083 return ctx->cert->sec_ex;
4087 * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that
4088 * can return unsigned long, instead of the generic long return value from the
4089 * control interface.
4091 unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
4093 return ctx->options;
4096 unsigned long SSL_get_options(const SSL *s)
4101 unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op)
4103 return ctx->options |= op;
4106 unsigned long SSL_set_options(SSL *s, unsigned long op)
4108 return s->options |= op;
4111 unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op)
4113 return ctx->options &= ~op;
4116 unsigned long SSL_clear_options(SSL *s, unsigned long op)
4118 return s->options &= ~op;
4121 STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
4123 return s->verified_chain;
4126 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
4128 #ifndef OPENSSL_NO_CT
4131 * Moves SCTs from the |src| stack to the |dst| stack.
4132 * The source of each SCT will be set to |origin|.
4133 * If |dst| points to a NULL pointer, a new stack will be created and owned by
4135 * Returns the number of SCTs moved, or a negative integer if an error occurs.
4137 static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
4138 sct_source_t origin)
4144 *dst = sk_SCT_new_null();
4146 SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE);
4151 while ((sct = sk_SCT_pop(src)) != NULL) {
4152 if (SCT_set_source(sct, origin) != 1)
4155 if (sk_SCT_push(*dst, sct) <= 0)
4163 sk_SCT_push(src, sct); /* Put the SCT back */
4168 * Look for data collected during ServerHello and parse if found.
4169 * Returns the number of SCTs extracted.
4171 static int ct_extract_tls_extension_scts(SSL *s)
4173 int scts_extracted = 0;
4175 if (s->ext.scts != NULL) {
4176 const unsigned char *p = s->ext.scts;
4177 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
4179 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
4181 SCT_LIST_free(scts);
4184 return scts_extracted;
4188 * Checks for an OCSP response and then attempts to extract any SCTs found if it
4189 * contains an SCT X509 extension. They will be stored in |s->scts|.
4191 * - The number of SCTs extracted, assuming an OCSP response exists.
4192 * - 0 if no OCSP response exists or it contains no SCTs.
4193 * - A negative integer if an error occurs.
4195 static int ct_extract_ocsp_response_scts(SSL *s)
4197 # ifndef OPENSSL_NO_OCSP
4198 int scts_extracted = 0;
4199 const unsigned char *p;
4200 OCSP_BASICRESP *br = NULL;
4201 OCSP_RESPONSE *rsp = NULL;
4202 STACK_OF(SCT) *scts = NULL;
4205 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
4208 p = s->ext.ocsp.resp;
4209 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
4213 br = OCSP_response_get1_basic(rsp);
4217 for (i = 0; i < OCSP_resp_count(br); ++i) {
4218 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
4224 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
4226 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
4227 if (scts_extracted < 0)
4231 SCT_LIST_free(scts);
4232 OCSP_BASICRESP_free(br);
4233 OCSP_RESPONSE_free(rsp);
4234 return scts_extracted;
4236 /* Behave as if no OCSP response exists */
4242 * Attempts to extract SCTs from the peer certificate.
4243 * Return the number of SCTs extracted, or a negative integer if an error
4246 static int ct_extract_x509v3_extension_scts(SSL *s)
4248 int scts_extracted = 0;
4249 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4252 STACK_OF(SCT) *scts =
4253 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
4256 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
4258 SCT_LIST_free(scts);
4261 return scts_extracted;
4265 * Attempts to find all received SCTs by checking TLS extensions, the OCSP
4266 * response (if it exists) and X509v3 extensions in the certificate.
4267 * Returns NULL if an error occurs.
4269 const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
4271 if (!s->scts_parsed) {
4272 if (ct_extract_tls_extension_scts(s) < 0 ||
4273 ct_extract_ocsp_response_scts(s) < 0 ||
4274 ct_extract_x509v3_extension_scts(s) < 0)
4284 static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
4285 const STACK_OF(SCT) *scts, void *unused_arg)
4290 static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
4291 const STACK_OF(SCT) *scts, void *unused_arg)
4293 int count = scts != NULL ? sk_SCT_num(scts) : 0;
4296 for (i = 0; i < count; ++i) {
4297 SCT *sct = sk_SCT_value(scts, i);
4298 int status = SCT_get_validation_status(sct);
4300 if (status == SCT_VALIDATION_STATUS_VALID)
4303 SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS);
4307 int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
4311 * Since code exists that uses the custom extension handler for CT, look
4312 * for this and throw an error if they have already registered to use CT.
4314 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
4315 TLSEXT_TYPE_signed_certificate_timestamp))
4317 SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK,
4318 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4322 if (callback != NULL) {
4324 * If we are validating CT, then we MUST accept SCTs served via OCSP
4326 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
4330 s->ct_validation_callback = callback;
4331 s->ct_validation_callback_arg = arg;
4336 int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
4337 ssl_ct_validation_cb callback, void *arg)
4340 * Since code exists that uses the custom extension handler for CT, look for
4341 * this and throw an error if they have already registered to use CT.
4343 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
4344 TLSEXT_TYPE_signed_certificate_timestamp))
4346 SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK,
4347 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4351 ctx->ct_validation_callback = callback;
4352 ctx->ct_validation_callback_arg = arg;
4356 int SSL_ct_is_enabled(const SSL *s)
4358 return s->ct_validation_callback != NULL;
4361 int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
4363 return ctx->ct_validation_callback != NULL;
4366 int ssl_validate_ct(SSL *s)
4369 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4371 SSL_DANE *dane = &s->dane;
4372 CT_POLICY_EVAL_CTX *ctx = NULL;
4373 const STACK_OF(SCT) *scts;
4376 * If no callback is set, the peer is anonymous, or its chain is invalid,
4377 * skip SCT validation - just return success. Applications that continue
4378 * handshakes without certificates, with unverified chains, or pinned leaf
4379 * certificates are outside the scope of the WebPKI and CT.
4381 * The above exclusions notwithstanding the vast majority of peers will
4382 * have rather ordinary certificate chains validated by typical
4383 * applications that perform certificate verification and therefore will
4384 * process SCTs when enabled.
4386 if (s->ct_validation_callback == NULL || cert == NULL ||
4387 s->verify_result != X509_V_OK ||
4388 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
4392 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
4393 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2
4395 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
4396 switch (dane->mtlsa->usage) {
4397 case DANETLS_USAGE_DANE_TA:
4398 case DANETLS_USAGE_DANE_EE:
4403 ctx = CT_POLICY_EVAL_CTX_new();
4405 SSLerr(SSL_F_SSL_VALIDATE_CT, ERR_R_MALLOC_FAILURE);
4409 issuer = sk_X509_value(s->verified_chain, 1);
4410 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
4411 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
4412 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store);
4413 CT_POLICY_EVAL_CTX_set_time(ctx, SSL_SESSION_get_time(SSL_get0_session(s)));
4415 scts = SSL_get0_peer_scts(s);
4418 * This function returns success (> 0) only when all the SCTs are valid, 0
4419 * when some are invalid, and < 0 on various internal errors (out of
4420 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient
4421 * reason to abort the handshake, that decision is up to the callback.
4422 * Therefore, we error out only in the unexpected case that the return
4423 * value is negative.
4425 * XXX: One might well argue that the return value of this function is an
4426 * unfortunate design choice. Its job is only to determine the validation
4427 * status of each of the provided SCTs. So long as it correctly separates
4428 * the wheat from the chaff it should return success. Failure in this case
4429 * ought to correspond to an inability to carry out its duties.
4431 if (SCT_LIST_validate(scts, ctx) < 0) {
4432 SSLerr(SSL_F_SSL_VALIDATE_CT, SSL_R_SCT_VERIFICATION_FAILED);
4436 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
4438 ret = 0; /* This function returns 0 on failure */
4441 CT_POLICY_EVAL_CTX_free(ctx);
4443 * With SSL_VERIFY_NONE the session may be cached and re-used despite a
4444 * failure return code here. Also the application may wish the complete
4445 * the handshake, and then disconnect cleanly at a higher layer, after
4446 * checking the verification status of the completed connection.
4448 * We therefore force a certificate verification failure which will be
4449 * visible via SSL_get_verify_result() and cached as part of any resumed
4452 * Note: the permissive callback is for information gathering only, always
4453 * returns success, and does not affect verification status. Only the
4454 * strict callback or a custom application-specified callback can trigger
4455 * connection failure or record a verification error.
4458 s->verify_result = X509_V_ERR_NO_VALID_SCTS;
4462 int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
4464 switch (validation_mode) {
4466 SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
4468 case SSL_CT_VALIDATION_PERMISSIVE:
4469 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
4470 case SSL_CT_VALIDATION_STRICT:
4471 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
4475 int SSL_enable_ct(SSL *s, int validation_mode)
4477 switch (validation_mode) {
4479 SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
4481 case SSL_CT_VALIDATION_PERMISSIVE:
4482 return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
4483 case SSL_CT_VALIDATION_STRICT:
4484 return SSL_set_ct_validation_callback(s, ct_strict, NULL);
4488 int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
4490 return CTLOG_STORE_load_default_file(ctx->ctlog_store);
4493 int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
4495 return CTLOG_STORE_load_file(ctx->ctlog_store, path);
4498 void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
4500 CTLOG_STORE_free(ctx->ctlog_store);
4501 ctx->ctlog_store = logs;
4504 const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
4506 return ctx->ctlog_store;
4509 #endif /* OPENSSL_NO_CT */
4511 void SSL_CTX_set_early_cb(SSL_CTX *c, SSL_early_cb_fn cb, void *arg)
4514 c->early_cb_arg = arg;
4517 int SSL_early_isv2(SSL *s)
4519 if (s->clienthello == NULL)
4521 return s->clienthello->isv2;
4524 unsigned int SSL_early_get0_legacy_version(SSL *s)
4526 if (s->clienthello == NULL)
4528 return s->clienthello->legacy_version;
4531 size_t SSL_early_get0_random(SSL *s, const unsigned char **out)
4533 if (s->clienthello == NULL)
4536 *out = s->clienthello->random;
4537 return SSL3_RANDOM_SIZE;
4540 size_t SSL_early_get0_session_id(SSL *s, const unsigned char **out)
4542 if (s->clienthello == NULL)
4545 *out = s->clienthello->session_id;
4546 return s->clienthello->session_id_len;
4549 size_t SSL_early_get0_ciphers(SSL *s, const unsigned char **out)
4551 if (s->clienthello == NULL)
4554 *out = PACKET_data(&s->clienthello->ciphersuites);
4555 return PACKET_remaining(&s->clienthello->ciphersuites);
4558 size_t SSL_early_get0_compression_methods(SSL *s, const unsigned char **out)
4560 if (s->clienthello == NULL)
4563 *out = s->clienthello->compressions;
4564 return s->clienthello->compressions_len;
4567 int SSL_early_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
4573 if (s->clienthello == NULL)
4575 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) {
4576 r = s->clienthello->pre_proc_exts + i;
4577 if (r->present && r->type == type) {
4579 *out = PACKET_data(&r->data);
4581 *outlen = PACKET_remaining(&r->data);
4588 void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
4590 ctx->keylog_callback = cb;
4593 SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
4595 return ctx->keylog_callback;
4598 static int nss_keylog_int(const char *prefix,
4600 const uint8_t *parameter_1,
4601 size_t parameter_1_len,
4602 const uint8_t *parameter_2,
4603 size_t parameter_2_len)
4606 char *cursor = NULL;
4611 if (ssl->ctx->keylog_callback == NULL) return 1;
4614 * Our output buffer will contain the following strings, rendered with
4615 * space characters in between, terminated by a NULL character: first the
4616 * prefix, then the first parameter, then the second parameter. The
4617 * meaning of each parameter depends on the specific key material being
4618 * logged. Note that the first and second parameters are encoded in
4619 * hexadecimal, so we need a buffer that is twice their lengths.
4621 prefix_len = strlen(prefix);
4622 out_len = prefix_len + (2*parameter_1_len) + (2*parameter_2_len) + 3;
4623 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
4624 SSLerr(SSL_F_NSS_KEYLOG_INT, ERR_R_MALLOC_FAILURE);
4628 strcpy(cursor, prefix);
4629 cursor += prefix_len;
4632 for (i = 0; i < parameter_1_len; i++) {
4633 sprintf(cursor, "%02x", parameter_1[i]);
4638 for (i = 0; i < parameter_2_len; i++) {
4639 sprintf(cursor, "%02x", parameter_2[i]);
4644 ssl->ctx->keylog_callback(ssl, (const char *)out);
4650 int ssl_log_rsa_client_key_exchange(SSL *ssl,
4651 const uint8_t *encrypted_premaster,
4652 size_t encrypted_premaster_len,
4653 const uint8_t *premaster,
4654 size_t premaster_len)
4656 if (encrypted_premaster_len < 8) {
4657 SSLerr(SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
4661 /* We only want the first 8 bytes of the encrypted premaster as a tag. */
4662 return nss_keylog_int("RSA",
4664 encrypted_premaster,
4670 int ssl_log_secret(SSL *ssl,
4672 const uint8_t *secret,
4675 return nss_keylog_int(label,
4677 ssl->s3->client_random,
4683 #define SSLV2_CIPHER_LEN 3
4685 int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format,
4690 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
4692 if (PACKET_remaining(cipher_suites) == 0) {
4693 SSLerr(SSL_F_SSL_CACHE_CIPHERLIST, SSL_R_NO_CIPHERS_SPECIFIED);
4694 *al = SSL_AD_ILLEGAL_PARAMETER;
4698 if (PACKET_remaining(cipher_suites) % n != 0) {
4699 SSLerr(SSL_F_SSL_CACHE_CIPHERLIST,
4700 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
4701 *al = SSL_AD_DECODE_ERROR;
4705 OPENSSL_free(s->s3->tmp.ciphers_raw);
4706 s->s3->tmp.ciphers_raw = NULL;
4707 s->s3->tmp.ciphers_rawlen = 0;
4710 size_t numciphers = PACKET_remaining(cipher_suites) / n;
4711 PACKET sslv2ciphers = *cipher_suites;
4712 unsigned int leadbyte;
4716 * We store the raw ciphers list in SSLv3+ format so we need to do some
4717 * preprocessing to convert the list first. If there are any SSLv2 only
4718 * ciphersuites with a non-zero leading byte then we are going to
4719 * slightly over allocate because we won't store those. But that isn't a
4722 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
4723 s->s3->tmp.ciphers_raw = raw;
4725 *al = SSL_AD_INTERNAL_ERROR;
4728 for (s->s3->tmp.ciphers_rawlen = 0;
4729 PACKET_remaining(&sslv2ciphers) > 0;
4730 raw += TLS_CIPHER_LEN) {
4731 if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
4733 && !PACKET_copy_bytes(&sslv2ciphers, raw,
4736 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
4737 *al = SSL_AD_INTERNAL_ERROR;
4738 OPENSSL_free(s->s3->tmp.ciphers_raw);
4739 s->s3->tmp.ciphers_raw = NULL;
4740 s->s3->tmp.ciphers_rawlen = 0;
4744 s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN;
4746 } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
4747 &s->s3->tmp.ciphers_rawlen)) {
4748 *al = SSL_AD_INTERNAL_ERROR;
4756 int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
4757 int isv2format, STACK_OF(SSL_CIPHER) **sk,
4758 STACK_OF(SSL_CIPHER) **scsvs)
4763 if (!PACKET_buf_init(&pkt, bytes, len))
4765 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, &alert);
4768 int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
4769 STACK_OF(SSL_CIPHER) **skp,
4770 STACK_OF(SSL_CIPHER) **scsvs_out,
4771 int sslv2format, int *al)
4773 const SSL_CIPHER *c;
4774 STACK_OF(SSL_CIPHER) *sk = NULL;
4775 STACK_OF(SSL_CIPHER) *scsvs = NULL;
4777 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
4778 unsigned char cipher[SSLV2_CIPHER_LEN];
4780 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
4782 if (PACKET_remaining(cipher_suites) == 0) {
4783 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
4784 *al = SSL_AD_ILLEGAL_PARAMETER;
4788 if (PACKET_remaining(cipher_suites) % n != 0) {
4789 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST,
4790 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
4791 *al = SSL_AD_DECODE_ERROR;
4795 sk = sk_SSL_CIPHER_new_null();
4796 scsvs = sk_SSL_CIPHER_new_null();
4797 if (sk == NULL || scsvs == NULL) {
4798 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
4799 *al = SSL_AD_INTERNAL_ERROR;
4803 while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
4805 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
4806 * first byte set to zero, while true SSLv2 ciphers have a non-zero
4807 * first byte. We don't support any true SSLv2 ciphers, so skip them.
4809 if (sslv2format && cipher[0] != '\0')
4812 /* For SSLv2-compat, ignore leading 0-byte. */
4813 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
4815 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
4816 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
4817 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
4818 *al = SSL_AD_INTERNAL_ERROR;
4823 if (PACKET_remaining(cipher_suites) > 0) {
4824 *al = SSL_AD_INTERNAL_ERROR;
4825 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_INTERNAL_ERROR);
4832 sk_SSL_CIPHER_free(sk);
4833 if (scsvs_out != NULL)
4836 sk_SSL_CIPHER_free(scsvs);
4839 sk_SSL_CIPHER_free(sk);
4840 sk_SSL_CIPHER_free(scsvs);
4844 int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
4846 ctx->max_early_data = max_early_data;
4851 uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
4853 return ctx->max_early_data;
4856 int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
4858 s->max_early_data = max_early_data;
4863 uint32_t SSL_get_max_early_data(const SSL_CTX *s)
4865 return s->max_early_data;