2 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 * Copyright 2005 Nokia. All rights reserved.
6 * Licensed under the OpenSSL license (the "License"). You may not use
7 * this file except in compliance with the License. You can obtain a copy
8 * in the file LICENSE in the source distribution or at
9 * https://www.openssl.org/source/license.html
14 #include <openssl/objects.h>
15 #include <openssl/x509v3.h>
16 #include <openssl/rand.h>
17 #include <openssl/ocsp.h>
18 #include <openssl/dh.h>
19 #include <openssl/engine.h>
20 #include <openssl/async.h>
21 #include <openssl/ct.h>
22 #include "internal/cryptlib.h"
23 #include "internal/rand.h"
24 #include "internal/refcount.h"
26 const char SSL_version_str[] = OPENSSL_VERSION_TEXT;
28 static int ssl_undefined_function_1(SSL *ssl, SSL3_RECORD *r, size_t s, int t)
33 return ssl_undefined_function(ssl);
36 static int ssl_undefined_function_2(SSL *ssl, SSL3_RECORD *r, unsigned char *s,
42 return ssl_undefined_function(ssl);
45 static int ssl_undefined_function_3(SSL *ssl, unsigned char *r,
46 unsigned char *s, size_t t, size_t *u)
52 return ssl_undefined_function(ssl);
55 static int ssl_undefined_function_4(SSL *ssl, int r)
58 return ssl_undefined_function(ssl);
61 static size_t ssl_undefined_function_5(SSL *ssl, const char *r, size_t s,
67 return ssl_undefined_function(ssl);
70 static int ssl_undefined_function_6(int r)
73 return ssl_undefined_function(NULL);
76 static int ssl_undefined_function_7(SSL *ssl, unsigned char *r, size_t s,
77 const char *t, size_t u,
78 const unsigned char *v, size_t w, int x)
87 return ssl_undefined_function(ssl);
90 SSL3_ENC_METHOD ssl3_undef_enc_method = {
91 ssl_undefined_function_1,
92 ssl_undefined_function_2,
93 ssl_undefined_function,
94 ssl_undefined_function_3,
95 ssl_undefined_function_4,
96 ssl_undefined_function_5,
97 NULL, /* client_finished_label */
98 0, /* client_finished_label_len */
99 NULL, /* server_finished_label */
100 0, /* server_finished_label_len */
101 ssl_undefined_function_6,
102 ssl_undefined_function_7,
105 struct ssl_async_args {
109 enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
111 int (*func_read) (SSL *, void *, size_t, size_t *);
112 int (*func_write) (SSL *, const void *, size_t, size_t *);
113 int (*func_other) (SSL *);
117 static const struct {
123 DANETLS_MATCHING_FULL, 0, NID_undef
126 DANETLS_MATCHING_2256, 1, NID_sha256
129 DANETLS_MATCHING_2512, 2, NID_sha512
133 static int dane_ctx_enable(struct dane_ctx_st *dctx)
135 const EVP_MD **mdevp;
137 uint8_t mdmax = DANETLS_MATCHING_LAST;
138 int n = ((int)mdmax) + 1; /* int to handle PrivMatch(255) */
141 if (dctx->mdevp != NULL)
144 mdevp = OPENSSL_zalloc(n * sizeof(*mdevp));
145 mdord = OPENSSL_zalloc(n * sizeof(*mdord));
147 if (mdord == NULL || mdevp == NULL) {
150 SSLerr(SSL_F_DANE_CTX_ENABLE, ERR_R_MALLOC_FAILURE);
154 /* Install default entries */
155 for (i = 0; i < OSSL_NELEM(dane_mds); ++i) {
158 if (dane_mds[i].nid == NID_undef ||
159 (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL)
161 mdevp[dane_mds[i].mtype] = md;
162 mdord[dane_mds[i].mtype] = dane_mds[i].ord;
172 static void dane_ctx_final(struct dane_ctx_st *dctx)
174 OPENSSL_free(dctx->mdevp);
177 OPENSSL_free(dctx->mdord);
182 static void tlsa_free(danetls_record *t)
186 OPENSSL_free(t->data);
187 EVP_PKEY_free(t->spki);
191 static void dane_final(SSL_DANE *dane)
193 sk_danetls_record_pop_free(dane->trecs, tlsa_free);
196 sk_X509_pop_free(dane->certs, X509_free);
199 X509_free(dane->mcert);
207 * dane_copy - Copy dane configuration, sans verification state.
209 static int ssl_dane_dup(SSL *to, SSL *from)
214 if (!DANETLS_ENABLED(&from->dane))
217 num = sk_danetls_record_num(from->dane.trecs);
218 dane_final(&to->dane);
219 to->dane.flags = from->dane.flags;
220 to->dane.dctx = &to->ctx->dane;
221 to->dane.trecs = sk_danetls_record_new_reserve(NULL, num);
223 if (to->dane.trecs == NULL) {
224 SSLerr(SSL_F_SSL_DANE_DUP, ERR_R_MALLOC_FAILURE);
228 for (i = 0; i < num; ++i) {
229 danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
231 if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype,
232 t->data, t->dlen) <= 0)
238 static int dane_mtype_set(struct dane_ctx_st *dctx,
239 const EVP_MD *md, uint8_t mtype, uint8_t ord)
243 if (mtype == DANETLS_MATCHING_FULL && md != NULL) {
244 SSLerr(SSL_F_DANE_MTYPE_SET, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL);
248 if (mtype > dctx->mdmax) {
249 const EVP_MD **mdevp;
251 int n = ((int)mtype) + 1;
253 mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp));
255 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
260 mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
262 SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
267 /* Zero-fill any gaps */
268 for (i = dctx->mdmax + 1; i < mtype; ++i) {
276 dctx->mdevp[mtype] = md;
277 /* Coerce ordinal of disabled matching types to 0 */
278 dctx->mdord[mtype] = (md == NULL) ? 0 : ord;
283 static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype)
285 if (mtype > dane->dctx->mdmax)
287 return dane->dctx->mdevp[mtype];
290 static int dane_tlsa_add(SSL_DANE *dane,
293 uint8_t mtype, unsigned char *data, size_t dlen)
296 const EVP_MD *md = NULL;
297 int ilen = (int)dlen;
301 if (dane->trecs == NULL) {
302 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_NOT_ENABLED);
306 if (ilen < 0 || dlen != (size_t)ilen) {
307 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
311 if (usage > DANETLS_USAGE_LAST) {
312 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
316 if (selector > DANETLS_SELECTOR_LAST) {
317 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_SELECTOR);
321 if (mtype != DANETLS_MATCHING_FULL) {
322 md = tlsa_md_get(dane, mtype);
324 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
329 if (md != NULL && dlen != (size_t)EVP_MD_size(md)) {
330 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
334 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_NULL_DATA);
338 if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) {
339 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
344 t->selector = selector;
346 t->data = OPENSSL_malloc(dlen);
347 if (t->data == NULL) {
349 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
352 memcpy(t->data, data, dlen);
355 /* Validate and cache full certificate or public key */
356 if (mtype == DANETLS_MATCHING_FULL) {
357 const unsigned char *p = data;
359 EVP_PKEY *pkey = NULL;
362 case DANETLS_SELECTOR_CERT:
363 if (!d2i_X509(&cert, &p, ilen) || p < data ||
364 dlen != (size_t)(p - data)) {
366 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
369 if (X509_get0_pubkey(cert) == NULL) {
371 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
375 if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) {
381 * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA
382 * records that contain full certificates of trust-anchors that are
383 * not present in the wire chain. For usage PKIX-TA(0), we augment
384 * the chain with untrusted Full(0) certificates from DNS, in case
385 * they are missing from the chain.
387 if ((dane->certs == NULL &&
388 (dane->certs = sk_X509_new_null()) == NULL) ||
389 !sk_X509_push(dane->certs, cert)) {
390 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
397 case DANETLS_SELECTOR_SPKI:
398 if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
399 dlen != (size_t)(p - data)) {
401 SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
406 * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA
407 * records that contain full bare keys of trust-anchors that are
408 * not present in the wire chain.
410 if (usage == DANETLS_USAGE_DANE_TA)
419 * Find the right insertion point for the new record.
421 * See crypto/x509/x509_vfy.c. We sort DANE-EE(3) records first, so that
422 * they can be processed first, as they require no chain building, and no
423 * expiration or hostname checks. Because DANE-EE(3) is numerically
424 * largest, this is accomplished via descending sort by "usage".
426 * We also sort in descending order by matching ordinal to simplify
427 * the implementation of digest agility in the verification code.
429 * The choice of order for the selector is not significant, so we
430 * use the same descending order for consistency.
432 num = sk_danetls_record_num(dane->trecs);
433 for (i = 0; i < num; ++i) {
434 danetls_record *rec = sk_danetls_record_value(dane->trecs, i);
436 if (rec->usage > usage)
438 if (rec->usage < usage)
440 if (rec->selector > selector)
442 if (rec->selector < selector)
444 if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype])
449 if (!sk_danetls_record_insert(dane->trecs, t, i)) {
451 SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
454 dane->umask |= DANETLS_USAGE_BIT(usage);
460 * Return 0 if there is only one version configured and it was disabled
461 * at configure time. Return 1 otherwise.
463 static int ssl_check_allowed_versions(int min_version, int max_version)
465 int minisdtls = 0, maxisdtls = 0;
467 /* Figure out if we're doing DTLS versions or TLS versions */
468 if (min_version == DTLS1_BAD_VER
469 || min_version >> 8 == DTLS1_VERSION_MAJOR)
471 if (max_version == DTLS1_BAD_VER
472 || max_version >> 8 == DTLS1_VERSION_MAJOR)
474 /* A wildcard version of 0 could be DTLS or TLS. */
475 if ((minisdtls && !maxisdtls && max_version != 0)
476 || (maxisdtls && !minisdtls && min_version != 0)) {
477 /* Mixing DTLS and TLS versions will lead to sadness; deny it. */
481 if (minisdtls || maxisdtls) {
482 /* Do DTLS version checks. */
483 if (min_version == 0)
484 /* Ignore DTLS1_BAD_VER */
485 min_version = DTLS1_VERSION;
486 if (max_version == 0)
487 max_version = DTLS1_2_VERSION;
488 #ifdef OPENSSL_NO_DTLS1_2
489 if (max_version == DTLS1_2_VERSION)
490 max_version = DTLS1_VERSION;
492 #ifdef OPENSSL_NO_DTLS1
493 if (min_version == DTLS1_VERSION)
494 min_version = DTLS1_2_VERSION;
496 /* Done massaging versions; do the check. */
498 #ifdef OPENSSL_NO_DTLS1
499 || (DTLS_VERSION_GE(min_version, DTLS1_VERSION)
500 && DTLS_VERSION_GE(DTLS1_VERSION, max_version))
502 #ifdef OPENSSL_NO_DTLS1_2
503 || (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION)
504 && DTLS_VERSION_GE(DTLS1_2_VERSION, max_version))
509 /* Regular TLS version checks. */
510 if (min_version == 0)
511 min_version = SSL3_VERSION;
512 if (max_version == 0)
513 max_version = TLS1_3_VERSION;
514 #ifdef OPENSSL_NO_TLS1_3
515 if (max_version == TLS1_3_VERSION)
516 max_version = TLS1_2_VERSION;
518 #ifdef OPENSSL_NO_TLS1_2
519 if (max_version == TLS1_2_VERSION)
520 max_version = TLS1_1_VERSION;
522 #ifdef OPENSSL_NO_TLS1_1
523 if (max_version == TLS1_1_VERSION)
524 max_version = TLS1_VERSION;
526 #ifdef OPENSSL_NO_TLS1
527 if (max_version == TLS1_VERSION)
528 max_version = SSL3_VERSION;
530 #ifdef OPENSSL_NO_SSL3
531 if (min_version == SSL3_VERSION)
532 min_version = TLS1_VERSION;
534 #ifdef OPENSSL_NO_TLS1
535 if (min_version == TLS1_VERSION)
536 min_version = TLS1_1_VERSION;
538 #ifdef OPENSSL_NO_TLS1_1
539 if (min_version == TLS1_1_VERSION)
540 min_version = TLS1_2_VERSION;
542 #ifdef OPENSSL_NO_TLS1_2
543 if (min_version == TLS1_2_VERSION)
544 min_version = TLS1_3_VERSION;
546 /* Done massaging versions; do the check. */
548 #ifdef OPENSSL_NO_SSL3
549 || (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version)
551 #ifdef OPENSSL_NO_TLS1
552 || (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version)
554 #ifdef OPENSSL_NO_TLS1_1
555 || (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version)
557 #ifdef OPENSSL_NO_TLS1_2
558 || (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version)
560 #ifdef OPENSSL_NO_TLS1_3
561 || (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version)
569 static void clear_ciphers(SSL *s)
571 /* clear the current cipher */
572 ssl_clear_cipher_ctx(s);
573 ssl_clear_hash_ctx(&s->read_hash);
574 ssl_clear_hash_ctx(&s->write_hash);
577 int SSL_clear(SSL *s)
579 if (s->method == NULL) {
580 SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED);
584 if (ssl_clear_bad_session(s)) {
585 SSL_SESSION_free(s->session);
588 SSL_SESSION_free(s->psksession);
589 s->psksession = NULL;
590 OPENSSL_free(s->psksession_id);
591 s->psksession_id = NULL;
592 s->psksession_id_len = 0;
598 if (s->renegotiate) {
599 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
603 ossl_statem_clear(s);
605 s->version = s->method->version;
606 s->client_version = s->version;
607 s->rwstate = SSL_NOTHING;
609 BUF_MEM_free(s->init_buf);
614 s->key_update = SSL_KEY_UPDATE_NONE;
616 /* Reset DANE verification result state */
619 X509_free(s->dane.mcert);
620 s->dane.mcert = NULL;
621 s->dane.mtlsa = NULL;
623 /* Clear the verification result peername */
624 X509_VERIFY_PARAM_move_peername(s->param, NULL);
627 * Check to see if we were changed into a different method, if so, revert
630 if (s->method != s->ctx->method) {
631 s->method->ssl_free(s);
632 s->method = s->ctx->method;
633 if (!s->method->ssl_new(s))
636 if (!s->method->ssl_clear(s))
640 RECORD_LAYER_clear(&s->rlayer);
645 /** Used to change an SSL_CTXs default SSL method type */
646 int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
648 STACK_OF(SSL_CIPHER) *sk;
652 sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list),
653 &(ctx->cipher_list_by_id),
654 SSL_DEFAULT_CIPHER_LIST, ctx->cert);
655 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
656 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
662 SSL *SSL_new(SSL_CTX *ctx)
667 SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX);
670 if (ctx->method == NULL) {
671 SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
675 s = OPENSSL_zalloc(sizeof(*s));
680 s->lock = CRYPTO_THREAD_lock_new();
681 if (s->lock == NULL) {
688 * If not using the standard RAND (say for fuzzing), then don't use a
691 if (RAND_get_rand_method() == RAND_OpenSSL()) {
693 RAND_DRBG_new(RAND_DRBG_NID, RAND_DRBG_FLAG_CTR_USE_DF,
694 RAND_DRBG_get0_public());
696 || RAND_DRBG_instantiate(s->drbg,
697 (const unsigned char *) SSL_version_str,
698 sizeof(SSL_version_str) - 1) == 0)
702 RECORD_LAYER_init(&s->rlayer, s);
704 s->options = ctx->options;
705 s->dane.flags = ctx->dane.flags;
706 s->min_proto_version = ctx->min_proto_version;
707 s->max_proto_version = ctx->max_proto_version;
709 s->max_cert_list = ctx->max_cert_list;
710 s->max_early_data = ctx->max_early_data;
713 * Earlier library versions used to copy the pointer to the CERT, not
714 * its contents; only when setting new parameters for the per-SSL
715 * copy, ssl_cert_new would be called (and the direct reference to
716 * the per-SSL_CTX settings would be lost, but those still were
717 * indirectly accessed for various purposes, and for that reason they
718 * used to be known as s->ctx->default_cert). Now we don't look at the
719 * SSL_CTX's CERT after having duplicated it once.
721 s->cert = ssl_cert_dup(ctx->cert);
725 RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
726 s->msg_callback = ctx->msg_callback;
727 s->msg_callback_arg = ctx->msg_callback_arg;
728 s->verify_mode = ctx->verify_mode;
729 s->not_resumable_session_cb = ctx->not_resumable_session_cb;
730 s->record_padding_cb = ctx->record_padding_cb;
731 s->record_padding_arg = ctx->record_padding_arg;
732 s->block_padding = ctx->block_padding;
733 s->sid_ctx_length = ctx->sid_ctx_length;
734 if (!ossl_assert(s->sid_ctx_length <= sizeof(s->sid_ctx)))
736 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
737 s->verify_callback = ctx->default_verify_callback;
738 s->generate_session_id = ctx->generate_session_id;
740 s->param = X509_VERIFY_PARAM_new();
741 if (s->param == NULL)
743 X509_VERIFY_PARAM_inherit(s->param, ctx->param);
744 s->quiet_shutdown = ctx->quiet_shutdown;
746 s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode;
747 s->max_send_fragment = ctx->max_send_fragment;
748 s->split_send_fragment = ctx->split_send_fragment;
749 s->max_pipelines = ctx->max_pipelines;
750 if (s->max_pipelines > 1)
751 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
752 if (ctx->default_read_buf_len > 0)
753 SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len);
758 s->ext.debug_arg = NULL;
759 s->ext.ticket_expected = 0;
760 s->ext.status_type = ctx->ext.status_type;
761 s->ext.status_expected = 0;
762 s->ext.ocsp.ids = NULL;
763 s->ext.ocsp.exts = NULL;
764 s->ext.ocsp.resp = NULL;
765 s->ext.ocsp.resp_len = 0;
767 s->session_ctx = ctx;
768 #ifndef OPENSSL_NO_EC
769 if (ctx->ext.ecpointformats) {
770 s->ext.ecpointformats =
771 OPENSSL_memdup(ctx->ext.ecpointformats,
772 ctx->ext.ecpointformats_len);
773 if (!s->ext.ecpointformats)
775 s->ext.ecpointformats_len =
776 ctx->ext.ecpointformats_len;
778 if (ctx->ext.supportedgroups) {
779 s->ext.supportedgroups =
780 OPENSSL_memdup(ctx->ext.supportedgroups,
781 ctx->ext.supportedgroups_len
782 * sizeof(*ctx->ext.supportedgroups));
783 if (!s->ext.supportedgroups)
785 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
788 #ifndef OPENSSL_NO_NEXTPROTONEG
792 if (s->ctx->ext.alpn) {
793 s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
794 if (s->ext.alpn == NULL)
796 memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
797 s->ext.alpn_len = s->ctx->ext.alpn_len;
800 s->verified_chain = NULL;
801 s->verify_result = X509_V_OK;
803 s->default_passwd_callback = ctx->default_passwd_callback;
804 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
806 s->method = ctx->method;
808 s->key_update = SSL_KEY_UPDATE_NONE;
810 if (!s->method->ssl_new(s))
813 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
818 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
821 #ifndef OPENSSL_NO_PSK
822 s->psk_client_callback = ctx->psk_client_callback;
823 s->psk_server_callback = ctx->psk_server_callback;
825 s->psk_find_session_cb = ctx->psk_find_session_cb;
826 s->psk_use_session_cb = ctx->psk_use_session_cb;
830 #ifndef OPENSSL_NO_CT
831 if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
832 ctx->ct_validation_callback_arg))
839 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
843 int SSL_is_dtls(const SSL *s)
845 return SSL_IS_DTLS(s) ? 1 : 0;
848 int SSL_up_ref(SSL *s)
852 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
855 REF_PRINT_COUNT("SSL", s);
856 REF_ASSERT_ISNT(i < 2);
857 return ((i > 1) ? 1 : 0);
860 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
861 unsigned int sid_ctx_len)
863 if (sid_ctx_len > sizeof(ctx->sid_ctx)) {
864 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
865 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
868 ctx->sid_ctx_length = sid_ctx_len;
869 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
874 int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
875 unsigned int sid_ctx_len)
877 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
878 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
879 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
882 ssl->sid_ctx_length = sid_ctx_len;
883 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
888 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
890 CRYPTO_THREAD_write_lock(ctx->lock);
891 ctx->generate_session_id = cb;
892 CRYPTO_THREAD_unlock(ctx->lock);
896 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
898 CRYPTO_THREAD_write_lock(ssl->lock);
899 ssl->generate_session_id = cb;
900 CRYPTO_THREAD_unlock(ssl->lock);
904 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
908 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
909 * we can "construct" a session to give us the desired check - i.e. to
910 * find if there's a session in the hash table that would conflict with
911 * any new session built out of this id/id_len and the ssl_version in use
916 if (id_len > sizeof(r.session_id))
919 r.ssl_version = ssl->version;
920 r.session_id_length = id_len;
921 memcpy(r.session_id, id, id_len);
923 CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
924 p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
925 CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
929 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
931 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
934 int SSL_set_purpose(SSL *s, int purpose)
936 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
939 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
941 return X509_VERIFY_PARAM_set_trust(s->param, trust);
944 int SSL_set_trust(SSL *s, int trust)
946 return X509_VERIFY_PARAM_set_trust(s->param, trust);
949 int SSL_set1_host(SSL *s, const char *hostname)
951 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
954 int SSL_add1_host(SSL *s, const char *hostname)
956 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
959 void SSL_set_hostflags(SSL *s, unsigned int flags)
961 X509_VERIFY_PARAM_set_hostflags(s->param, flags);
964 const char *SSL_get0_peername(SSL *s)
966 return X509_VERIFY_PARAM_get0_peername(s->param);
969 int SSL_CTX_dane_enable(SSL_CTX *ctx)
971 return dane_ctx_enable(&ctx->dane);
974 unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
976 unsigned long orig = ctx->dane.flags;
978 ctx->dane.flags |= flags;
982 unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
984 unsigned long orig = ctx->dane.flags;
986 ctx->dane.flags &= ~flags;
990 int SSL_dane_enable(SSL *s, const char *basedomain)
992 SSL_DANE *dane = &s->dane;
994 if (s->ctx->dane.mdmax == 0) {
995 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED);
998 if (dane->trecs != NULL) {
999 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED);
1004 * Default SNI name. This rejects empty names, while set1_host below
1005 * accepts them and disables host name checks. To avoid side-effects with
1006 * invalid input, set the SNI name first.
1008 if (s->ext.hostname == NULL) {
1009 if (!SSL_set_tlsext_host_name(s, basedomain)) {
1010 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1015 /* Primary RFC6125 reference identifier */
1016 if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
1017 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1023 dane->dctx = &s->ctx->dane;
1024 dane->trecs = sk_danetls_record_new_null();
1026 if (dane->trecs == NULL) {
1027 SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE);
1033 unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
1035 unsigned long orig = ssl->dane.flags;
1037 ssl->dane.flags |= flags;
1041 unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
1043 unsigned long orig = ssl->dane.flags;
1045 ssl->dane.flags &= ~flags;
1049 int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
1051 SSL_DANE *dane = &s->dane;
1053 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1057 *mcert = dane->mcert;
1059 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
1064 int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
1065 uint8_t *mtype, unsigned const char **data, size_t *dlen)
1067 SSL_DANE *dane = &s->dane;
1069 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1073 *usage = dane->mtlsa->usage;
1075 *selector = dane->mtlsa->selector;
1077 *mtype = dane->mtlsa->mtype;
1079 *data = dane->mtlsa->data;
1081 *dlen = dane->mtlsa->dlen;
1086 SSL_DANE *SSL_get0_dane(SSL *s)
1091 int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
1092 uint8_t mtype, unsigned char *data, size_t dlen)
1094 return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen);
1097 int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
1100 return dane_mtype_set(&ctx->dane, md, mtype, ord);
1103 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
1105 return X509_VERIFY_PARAM_set1(ctx->param, vpm);
1108 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
1110 return X509_VERIFY_PARAM_set1(ssl->param, vpm);
1113 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
1118 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
1123 void SSL_certs_clear(SSL *s)
1125 ssl_cert_clear_certs(s->cert);
1128 void SSL_free(SSL *s)
1135 CRYPTO_DOWN_REF(&s->references, &i, s->lock);
1136 REF_PRINT_COUNT("SSL", s);
1139 REF_ASSERT_ISNT(i < 0);
1141 X509_VERIFY_PARAM_free(s->param);
1142 dane_final(&s->dane);
1143 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
1145 /* Ignore return value */
1146 ssl_free_wbio_buffer(s);
1148 BIO_free_all(s->wbio);
1149 BIO_free_all(s->rbio);
1151 BUF_MEM_free(s->init_buf);
1153 /* add extra stuff */
1154 sk_SSL_CIPHER_free(s->cipher_list);
1155 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1157 /* Make the next call work :-) */
1158 if (s->session != NULL) {
1159 ssl_clear_bad_session(s);
1160 SSL_SESSION_free(s->session);
1162 SSL_SESSION_free(s->psksession);
1163 OPENSSL_free(s->psksession_id);
1167 ssl_cert_free(s->cert);
1168 /* Free up if allocated */
1170 OPENSSL_free(s->ext.hostname);
1171 SSL_CTX_free(s->session_ctx);
1172 #ifndef OPENSSL_NO_EC
1173 OPENSSL_free(s->ext.ecpointformats);
1174 OPENSSL_free(s->ext.supportedgroups);
1175 #endif /* OPENSSL_NO_EC */
1176 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
1177 #ifndef OPENSSL_NO_OCSP
1178 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
1180 #ifndef OPENSSL_NO_CT
1181 SCT_LIST_free(s->scts);
1182 OPENSSL_free(s->ext.scts);
1184 OPENSSL_free(s->ext.ocsp.resp);
1185 OPENSSL_free(s->ext.alpn);
1186 OPENSSL_free(s->ext.tls13_cookie);
1187 OPENSSL_free(s->clienthello);
1189 sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free);
1191 sk_X509_pop_free(s->verified_chain, X509_free);
1193 if (s->method != NULL)
1194 s->method->ssl_free(s);
1196 RECORD_LAYER_release(&s->rlayer);
1198 SSL_CTX_free(s->ctx);
1200 ASYNC_WAIT_CTX_free(s->waitctx);
1202 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1203 OPENSSL_free(s->ext.npn);
1206 #ifndef OPENSSL_NO_SRTP
1207 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
1210 RAND_DRBG_free(s->drbg);
1211 CRYPTO_THREAD_lock_free(s->lock);
1216 void SSL_set0_rbio(SSL *s, BIO *rbio)
1218 BIO_free_all(s->rbio);
1222 void SSL_set0_wbio(SSL *s, BIO *wbio)
1225 * If the output buffering BIO is still in place, remove it
1227 if (s->bbio != NULL)
1228 s->wbio = BIO_pop(s->wbio);
1230 BIO_free_all(s->wbio);
1233 /* Re-attach |bbio| to the new |wbio|. */
1234 if (s->bbio != NULL)
1235 s->wbio = BIO_push(s->bbio, s->wbio);
1238 void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
1241 * For historical reasons, this function has many different cases in
1242 * ownership handling.
1245 /* If nothing has changed, do nothing */
1246 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
1250 * If the two arguments are equal then one fewer reference is granted by the
1251 * caller than we want to take
1253 if (rbio != NULL && rbio == wbio)
1257 * If only the wbio is changed only adopt one reference.
1259 if (rbio == SSL_get_rbio(s)) {
1260 SSL_set0_wbio(s, wbio);
1264 * There is an asymmetry here for historical reasons. If only the rbio is
1265 * changed AND the rbio and wbio were originally different, then we only
1266 * adopt one reference.
1268 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
1269 SSL_set0_rbio(s, rbio);
1273 /* Otherwise, adopt both references. */
1274 SSL_set0_rbio(s, rbio);
1275 SSL_set0_wbio(s, wbio);
1278 BIO *SSL_get_rbio(const SSL *s)
1283 BIO *SSL_get_wbio(const SSL *s)
1285 if (s->bbio != NULL) {
1287 * If |bbio| is active, the true caller-configured BIO is its
1290 return BIO_next(s->bbio);
1295 int SSL_get_fd(const SSL *s)
1297 return SSL_get_rfd(s);
1300 int SSL_get_rfd(const SSL *s)
1305 b = SSL_get_rbio(s);
1306 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1308 BIO_get_fd(r, &ret);
1312 int SSL_get_wfd(const SSL *s)
1317 b = SSL_get_wbio(s);
1318 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1320 BIO_get_fd(r, &ret);
1324 #ifndef OPENSSL_NO_SOCK
1325 int SSL_set_fd(SSL *s, int fd)
1330 bio = BIO_new(BIO_s_socket());
1333 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
1336 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1337 SSL_set_bio(s, bio, bio);
1343 int SSL_set_wfd(SSL *s, int fd)
1345 BIO *rbio = SSL_get_rbio(s);
1347 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
1348 || (int)BIO_get_fd(rbio, NULL) != fd) {
1349 BIO *bio = BIO_new(BIO_s_socket());
1352 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB);
1355 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1356 SSL_set0_wbio(s, bio);
1359 SSL_set0_wbio(s, rbio);
1364 int SSL_set_rfd(SSL *s, int fd)
1366 BIO *wbio = SSL_get_wbio(s);
1368 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
1369 || ((int)BIO_get_fd(wbio, NULL) != fd)) {
1370 BIO *bio = BIO_new(BIO_s_socket());
1373 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB);
1376 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1377 SSL_set0_rbio(s, bio);
1380 SSL_set0_rbio(s, wbio);
1387 /* return length of latest Finished message we sent, copy to 'buf' */
1388 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
1392 if (s->s3 != NULL) {
1393 ret = s->s3->tmp.finish_md_len;
1396 memcpy(buf, s->s3->tmp.finish_md, count);
1401 /* return length of latest Finished message we expected, copy to 'buf' */
1402 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
1406 if (s->s3 != NULL) {
1407 ret = s->s3->tmp.peer_finish_md_len;
1410 memcpy(buf, s->s3->tmp.peer_finish_md, count);
1415 int SSL_get_verify_mode(const SSL *s)
1417 return s->verify_mode;
1420 int SSL_get_verify_depth(const SSL *s)
1422 return X509_VERIFY_PARAM_get_depth(s->param);
1425 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
1426 return s->verify_callback;
1429 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
1431 return ctx->verify_mode;
1434 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
1436 return X509_VERIFY_PARAM_get_depth(ctx->param);
1439 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
1440 return ctx->default_verify_callback;
1443 void SSL_set_verify(SSL *s, int mode,
1444 int (*callback) (int ok, X509_STORE_CTX *ctx))
1446 s->verify_mode = mode;
1447 if (callback != NULL)
1448 s->verify_callback = callback;
1451 void SSL_set_verify_depth(SSL *s, int depth)
1453 X509_VERIFY_PARAM_set_depth(s->param, depth);
1456 void SSL_set_read_ahead(SSL *s, int yes)
1458 RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
1461 int SSL_get_read_ahead(const SSL *s)
1463 return RECORD_LAYER_get_read_ahead(&s->rlayer);
1466 int SSL_pending(const SSL *s)
1468 size_t pending = s->method->ssl_pending(s);
1471 * SSL_pending cannot work properly if read-ahead is enabled
1472 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
1473 * impossible to fix since SSL_pending cannot report errors that may be
1474 * observed while scanning the new data. (Note that SSL_pending() is
1475 * often used as a boolean value, so we'd better not return -1.)
1477 * SSL_pending also cannot work properly if the value >INT_MAX. In that case
1478 * we just return INT_MAX.
1480 return pending < INT_MAX ? (int)pending : INT_MAX;
1483 int SSL_has_pending(const SSL *s)
1486 * Similar to SSL_pending() but returns a 1 to indicate that we have
1487 * unprocessed data available or 0 otherwise (as opposed to the number of
1488 * bytes available). Unlike SSL_pending() this will take into account
1489 * read_ahead data. A 1 return simply indicates that we have unprocessed
1490 * data. That data may not result in any application data, or we may fail
1491 * to parse the records for some reason.
1493 if (RECORD_LAYER_processed_read_pending(&s->rlayer))
1496 return RECORD_LAYER_read_pending(&s->rlayer);
1499 X509 *SSL_get_peer_certificate(const SSL *s)
1503 if ((s == NULL) || (s->session == NULL))
1506 r = s->session->peer;
1516 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
1520 if ((s == NULL) || (s->session == NULL))
1523 r = s->session->peer_chain;
1526 * If we are a client, cert_chain includes the peer's own certificate; if
1527 * we are a server, it does not.
1534 * Now in theory, since the calling process own 't' it should be safe to
1535 * modify. We need to be able to read f without being hassled
1537 int SSL_copy_session_id(SSL *t, const SSL *f)
1540 /* Do we need to to SSL locking? */
1541 if (!SSL_set_session(t, SSL_get_session(f))) {
1546 * what if we are setup for one protocol version but want to talk another
1548 if (t->method != f->method) {
1549 t->method->ssl_free(t);
1550 t->method = f->method;
1551 if (t->method->ssl_new(t) == 0)
1555 CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock);
1556 ssl_cert_free(t->cert);
1558 if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
1565 /* Fix this so it checks all the valid key/cert options */
1566 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
1568 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
1569 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1572 if (ctx->cert->key->privatekey == NULL) {
1573 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1576 return X509_check_private_key
1577 (ctx->cert->key->x509, ctx->cert->key->privatekey);
1580 /* Fix this function so that it takes an optional type parameter */
1581 int SSL_check_private_key(const SSL *ssl)
1584 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
1587 if (ssl->cert->key->x509 == NULL) {
1588 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1591 if (ssl->cert->key->privatekey == NULL) {
1592 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1595 return X509_check_private_key(ssl->cert->key->x509,
1596 ssl->cert->key->privatekey);
1599 int SSL_waiting_for_async(SSL *s)
1607 int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
1609 ASYNC_WAIT_CTX *ctx = s->waitctx;
1613 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
1616 int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
1617 OSSL_ASYNC_FD *delfd, size_t *numdelfds)
1619 ASYNC_WAIT_CTX *ctx = s->waitctx;
1623 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
1627 int SSL_accept(SSL *s)
1629 if (s->handshake_func == NULL) {
1630 /* Not properly initialized yet */
1631 SSL_set_accept_state(s);
1634 return SSL_do_handshake(s);
1637 int SSL_connect(SSL *s)
1639 if (s->handshake_func == NULL) {
1640 /* Not properly initialized yet */
1641 SSL_set_connect_state(s);
1644 return SSL_do_handshake(s);
1647 long SSL_get_default_timeout(const SSL *s)
1649 return s->method->get_timeout();
1652 static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
1653 int (*func) (void *))
1656 if (s->waitctx == NULL) {
1657 s->waitctx = ASYNC_WAIT_CTX_new();
1658 if (s->waitctx == NULL)
1661 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args,
1662 sizeof(struct ssl_async_args))) {
1664 s->rwstate = SSL_NOTHING;
1665 SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC);
1668 s->rwstate = SSL_ASYNC_PAUSED;
1671 s->rwstate = SSL_ASYNC_NO_JOBS;
1677 s->rwstate = SSL_NOTHING;
1678 SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR);
1679 /* Shouldn't happen */
1684 static int ssl_io_intern(void *vargs)
1686 struct ssl_async_args *args;
1691 args = (struct ssl_async_args *)vargs;
1695 switch (args->type) {
1697 return args->f.func_read(s, buf, num, &s->asyncrw);
1699 return args->f.func_write(s, buf, num, &s->asyncrw);
1701 return args->f.func_other(s);
1706 int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1708 if (s->handshake_func == NULL) {
1709 SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED);
1713 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1714 s->rwstate = SSL_NOTHING;
1718 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1719 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
1720 SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1724 * If we are a client and haven't received the ServerHello etc then we
1727 ossl_statem_check_finish_init(s, 0);
1729 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1730 struct ssl_async_args args;
1736 args.type = READFUNC;
1737 args.f.func_read = s->method->ssl_read;
1739 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1740 *readbytes = s->asyncrw;
1743 return s->method->ssl_read(s, buf, num, readbytes);
1747 int SSL_read(SSL *s, void *buf, int num)
1753 SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH);
1757 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
1760 * The cast is safe here because ret should be <= INT_MAX because num is
1764 ret = (int)readbytes;
1769 int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1771 int ret = ssl_read_internal(s, buf, num, readbytes);
1778 int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
1783 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1784 return SSL_READ_EARLY_DATA_ERROR;
1787 switch (s->early_data_state) {
1788 case SSL_EARLY_DATA_NONE:
1789 if (!SSL_in_before(s)) {
1790 SSLerr(SSL_F_SSL_READ_EARLY_DATA,
1791 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1792 return SSL_READ_EARLY_DATA_ERROR;
1796 case SSL_EARLY_DATA_ACCEPT_RETRY:
1797 s->early_data_state = SSL_EARLY_DATA_ACCEPTING;
1798 ret = SSL_accept(s);
1801 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
1802 return SSL_READ_EARLY_DATA_ERROR;
1806 case SSL_EARLY_DATA_READ_RETRY:
1807 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
1808 s->early_data_state = SSL_EARLY_DATA_READING;
1809 ret = SSL_read_ex(s, buf, num, readbytes);
1811 * State machine will update early_data_state to
1812 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData
1815 if (ret > 0 || (ret <= 0 && s->early_data_state
1816 != SSL_EARLY_DATA_FINISHED_READING)) {
1817 s->early_data_state = SSL_EARLY_DATA_READ_RETRY;
1818 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
1819 : SSL_READ_EARLY_DATA_ERROR;
1822 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
1825 return SSL_READ_EARLY_DATA_FINISH;
1828 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1829 return SSL_READ_EARLY_DATA_ERROR;
1833 int SSL_get_early_data_status(const SSL *s)
1835 return s->ext.early_data;
1838 static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1840 if (s->handshake_func == NULL) {
1841 SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED);
1845 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1848 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1849 struct ssl_async_args args;
1855 args.type = READFUNC;
1856 args.f.func_read = s->method->ssl_peek;
1858 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1859 *readbytes = s->asyncrw;
1862 return s->method->ssl_peek(s, buf, num, readbytes);
1866 int SSL_peek(SSL *s, void *buf, int num)
1872 SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH);
1876 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
1879 * The cast is safe here because ret should be <= INT_MAX because num is
1883 ret = (int)readbytes;
1889 int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1891 int ret = ssl_peek_internal(s, buf, num, readbytes);
1898 int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
1900 if (s->handshake_func == NULL) {
1901 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED);
1905 if (s->shutdown & SSL_SENT_SHUTDOWN) {
1906 s->rwstate = SSL_NOTHING;
1907 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN);
1911 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1912 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY
1913 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
1914 SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1917 /* If we are a client and haven't sent the Finished we better do that */
1918 ossl_statem_check_finish_init(s, 1);
1920 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1922 struct ssl_async_args args;
1925 args.buf = (void *)buf;
1927 args.type = WRITEFUNC;
1928 args.f.func_write = s->method->ssl_write;
1930 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1931 *written = s->asyncrw;
1934 return s->method->ssl_write(s, buf, num, written);
1938 int SSL_write(SSL *s, const void *buf, int num)
1944 SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH);
1948 ret = ssl_write_internal(s, buf, (size_t)num, &written);
1951 * The cast is safe here because ret should be <= INT_MAX because num is
1960 int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
1962 int ret = ssl_write_internal(s, buf, num, written);
1969 int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
1971 int ret, early_data_state;
1974 switch (s->early_data_state) {
1975 case SSL_EARLY_DATA_NONE:
1977 || !SSL_in_before(s)
1978 || ((s->session == NULL || s->session->ext.max_early_data == 0)
1979 && (s->psk_use_session_cb == NULL))) {
1980 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA,
1981 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1986 case SSL_EARLY_DATA_CONNECT_RETRY:
1987 s->early_data_state = SSL_EARLY_DATA_CONNECTING;
1988 ret = SSL_connect(s);
1991 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
1996 case SSL_EARLY_DATA_WRITE_RETRY:
1997 s->early_data_state = SSL_EARLY_DATA_WRITING;
1998 ret = SSL_write_ex(s, buf, num, &writtmp);
2000 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2003 s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH;
2006 case SSL_EARLY_DATA_WRITE_FLUSH:
2007 /* The buffering BIO is still in place so we need to flush it */
2008 if (statem_flush(s) != 1)
2011 * TODO(TLS1.3): Technically this may not be correct in the event of
2012 * SSL_MODE_ENABLE_PARTIAL_WRITE. What should we do about this?
2015 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2018 case SSL_EARLY_DATA_FINISHED_READING:
2019 case SSL_EARLY_DATA_READ_RETRY:
2020 early_data_state = s->early_data_state;
2021 /* We are a server writing to an unauthenticated client */
2022 s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING;
2023 ret = SSL_write_ex(s, buf, num, written);
2024 s->early_data_state = early_data_state;
2028 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2033 int SSL_shutdown(SSL *s)
2036 * Note that this function behaves differently from what one might
2037 * expect. Return values are 0 for no success (yet), 1 for success; but
2038 * calling it once is usually not enough, even if blocking I/O is used
2039 * (see ssl3_shutdown).
2042 if (s->handshake_func == NULL) {
2043 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
2047 if (!SSL_in_init(s)) {
2048 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2049 struct ssl_async_args args;
2052 args.type = OTHERFUNC;
2053 args.f.func_other = s->method->ssl_shutdown;
2055 return ssl_start_async_job(s, &args, ssl_io_intern);
2057 return s->method->ssl_shutdown(s);
2060 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT);
2065 int SSL_key_update(SSL *s, int updatetype)
2068 * TODO(TLS1.3): How will applications know whether TLSv1.3 has been
2069 * negotiated, and that it is appropriate to call SSL_key_update() instead
2070 * of SSL_renegotiate().
2072 if (!SSL_IS_TLS13(s)) {
2073 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION);
2077 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
2078 && updatetype != SSL_KEY_UPDATE_REQUESTED) {
2079 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE);
2083 if (!SSL_is_init_finished(s)) {
2084 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT);
2088 ossl_statem_set_in_init(s, 1);
2089 s->key_update = updatetype;
2093 int SSL_get_key_update_type(SSL *s)
2095 return s->key_update;
2098 int SSL_renegotiate(SSL *s)
2100 if (SSL_IS_TLS13(s)) {
2101 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION);
2105 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2106 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION);
2113 return s->method->ssl_renegotiate(s);
2116 int SSL_renegotiate_abbreviated(SSL *s)
2118 if (SSL_IS_TLS13(s)) {
2119 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION);
2123 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2124 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION);
2131 return s->method->ssl_renegotiate(s);
2134 int SSL_renegotiate_pending(SSL *s)
2137 * becomes true when negotiation is requested; false again once a
2138 * handshake has finished
2140 return (s->renegotiate != 0);
2143 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
2148 case SSL_CTRL_GET_READ_AHEAD:
2149 return RECORD_LAYER_get_read_ahead(&s->rlayer);
2150 case SSL_CTRL_SET_READ_AHEAD:
2151 l = RECORD_LAYER_get_read_ahead(&s->rlayer);
2152 RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
2155 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2156 s->msg_callback_arg = parg;
2160 return (s->mode |= larg);
2161 case SSL_CTRL_CLEAR_MODE:
2162 return (s->mode &= ~larg);
2163 case SSL_CTRL_GET_MAX_CERT_LIST:
2164 return (long)s->max_cert_list;
2165 case SSL_CTRL_SET_MAX_CERT_LIST:
2168 l = (long)s->max_cert_list;
2169 s->max_cert_list = (size_t)larg;
2171 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2172 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2174 s->max_send_fragment = larg;
2175 if (s->max_send_fragment < s->split_send_fragment)
2176 s->split_send_fragment = s->max_send_fragment;
2178 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2179 if ((size_t)larg > s->max_send_fragment || larg == 0)
2181 s->split_send_fragment = larg;
2183 case SSL_CTRL_SET_MAX_PIPELINES:
2184 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2186 s->max_pipelines = larg;
2188 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
2190 case SSL_CTRL_GET_RI_SUPPORT:
2192 return s->s3->send_connection_binding;
2195 case SSL_CTRL_CERT_FLAGS:
2196 return (s->cert->cert_flags |= larg);
2197 case SSL_CTRL_CLEAR_CERT_FLAGS:
2198 return (s->cert->cert_flags &= ~larg);
2200 case SSL_CTRL_GET_RAW_CIPHERLIST:
2202 if (s->s3->tmp.ciphers_raw == NULL)
2204 *(unsigned char **)parg = s->s3->tmp.ciphers_raw;
2205 return (int)s->s3->tmp.ciphers_rawlen;
2207 return TLS_CIPHER_LEN;
2209 case SSL_CTRL_GET_EXTMS_SUPPORT:
2210 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
2212 if (s->session->flags & SSL_SESS_FLAG_EXTMS)
2216 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2217 return ssl_check_allowed_versions(larg, s->max_proto_version)
2218 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2219 &s->min_proto_version);
2220 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2221 return s->min_proto_version;
2222 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2223 return ssl_check_allowed_versions(s->min_proto_version, larg)
2224 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2225 &s->max_proto_version);
2226 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2227 return s->max_proto_version;
2229 return s->method->ssl_ctrl(s, cmd, larg, parg);
2233 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
2236 case SSL_CTRL_SET_MSG_CALLBACK:
2237 s->msg_callback = (void (*)
2238 (int write_p, int version, int content_type,
2239 const void *buf, size_t len, SSL *ssl,
2244 return s->method->ssl_callback_ctrl(s, cmd, fp);
2248 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
2250 return ctx->sessions;
2253 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
2257 /* For some cases with ctx == NULL perform syntax checks */
2260 #ifndef OPENSSL_NO_EC
2261 case SSL_CTRL_SET_GROUPS_LIST:
2262 return tls1_set_groups_list(NULL, NULL, parg);
2264 case SSL_CTRL_SET_SIGALGS_LIST:
2265 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
2266 return tls1_set_sigalgs_list(NULL, parg, 0);
2273 case SSL_CTRL_GET_READ_AHEAD:
2274 return ctx->read_ahead;
2275 case SSL_CTRL_SET_READ_AHEAD:
2276 l = ctx->read_ahead;
2277 ctx->read_ahead = larg;
2280 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2281 ctx->msg_callback_arg = parg;
2284 case SSL_CTRL_GET_MAX_CERT_LIST:
2285 return (long)ctx->max_cert_list;
2286 case SSL_CTRL_SET_MAX_CERT_LIST:
2289 l = (long)ctx->max_cert_list;
2290 ctx->max_cert_list = (size_t)larg;
2293 case SSL_CTRL_SET_SESS_CACHE_SIZE:
2296 l = (long)ctx->session_cache_size;
2297 ctx->session_cache_size = (size_t)larg;
2299 case SSL_CTRL_GET_SESS_CACHE_SIZE:
2300 return (long)ctx->session_cache_size;
2301 case SSL_CTRL_SET_SESS_CACHE_MODE:
2302 l = ctx->session_cache_mode;
2303 ctx->session_cache_mode = larg;
2305 case SSL_CTRL_GET_SESS_CACHE_MODE:
2306 return ctx->session_cache_mode;
2308 case SSL_CTRL_SESS_NUMBER:
2309 return lh_SSL_SESSION_num_items(ctx->sessions);
2310 case SSL_CTRL_SESS_CONNECT:
2311 return CRYPTO_atomic_read(&ctx->stats.sess_connect, &i, ctx->lock)
2313 case SSL_CTRL_SESS_CONNECT_GOOD:
2314 return CRYPTO_atomic_read(&ctx->stats.sess_connect_good, &i, ctx->lock)
2316 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
2317 return CRYPTO_atomic_read(&ctx->stats.sess_connect_renegotiate, &i,
2320 case SSL_CTRL_SESS_ACCEPT:
2321 return CRYPTO_atomic_read(&ctx->stats.sess_accept, &i, ctx->lock)
2323 case SSL_CTRL_SESS_ACCEPT_GOOD:
2324 return CRYPTO_atomic_read(&ctx->stats.sess_accept_good, &i, ctx->lock)
2326 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
2327 return CRYPTO_atomic_read(&ctx->stats.sess_accept_renegotiate, &i,
2330 case SSL_CTRL_SESS_HIT:
2331 return CRYPTO_atomic_read(&ctx->stats.sess_hit, &i, ctx->lock)
2333 case SSL_CTRL_SESS_CB_HIT:
2334 return CRYPTO_atomic_read(&ctx->stats.sess_cb_hit, &i, ctx->lock)
2336 case SSL_CTRL_SESS_MISSES:
2337 return CRYPTO_atomic_read(&ctx->stats.sess_miss, &i, ctx->lock)
2339 case SSL_CTRL_SESS_TIMEOUTS:
2340 return CRYPTO_atomic_read(&ctx->stats.sess_timeout, &i, ctx->lock)
2342 case SSL_CTRL_SESS_CACHE_FULL:
2343 return CRYPTO_atomic_read(&ctx->stats.sess_cache_full, &i, ctx->lock)
2346 return (ctx->mode |= larg);
2347 case SSL_CTRL_CLEAR_MODE:
2348 return (ctx->mode &= ~larg);
2349 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2350 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2352 ctx->max_send_fragment = larg;
2353 if (ctx->max_send_fragment < ctx->split_send_fragment)
2354 ctx->split_send_fragment = ctx->max_send_fragment;
2356 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2357 if ((size_t)larg > ctx->max_send_fragment || larg == 0)
2359 ctx->split_send_fragment = larg;
2361 case SSL_CTRL_SET_MAX_PIPELINES:
2362 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2364 ctx->max_pipelines = larg;
2366 case SSL_CTRL_CERT_FLAGS:
2367 return (ctx->cert->cert_flags |= larg);
2368 case SSL_CTRL_CLEAR_CERT_FLAGS:
2369 return (ctx->cert->cert_flags &= ~larg);
2370 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2371 return ssl_check_allowed_versions(larg, ctx->max_proto_version)
2372 && ssl_set_version_bound(ctx->method->version, (int)larg,
2373 &ctx->min_proto_version);
2374 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2375 return ctx->min_proto_version;
2376 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2377 return ssl_check_allowed_versions(ctx->min_proto_version, larg)
2378 && ssl_set_version_bound(ctx->method->version, (int)larg,
2379 &ctx->max_proto_version);
2380 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2381 return ctx->max_proto_version;
2383 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg);
2387 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
2390 case SSL_CTRL_SET_MSG_CALLBACK:
2391 ctx->msg_callback = (void (*)
2392 (int write_p, int version, int content_type,
2393 const void *buf, size_t len, SSL *ssl,
2398 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp);
2402 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
2411 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
2412 const SSL_CIPHER *const *bp)
2414 if ((*ap)->id > (*bp)->id)
2416 if ((*ap)->id < (*bp)->id)
2421 /** return a STACK of the ciphers available for the SSL and in order of
2423 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
2426 if (s->cipher_list != NULL) {
2427 return s->cipher_list;
2428 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
2429 return s->ctx->cipher_list;
2435 STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
2437 if ((s == NULL) || (s->session == NULL) || !s->server)
2439 return s->session->ciphers;
2442 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
2444 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
2446 ciphers = SSL_get_ciphers(s);
2449 ssl_set_client_disabled(s);
2450 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
2451 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
2452 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) {
2454 sk = sk_SSL_CIPHER_new_null();
2457 if (!sk_SSL_CIPHER_push(sk, c)) {
2458 sk_SSL_CIPHER_free(sk);
2466 /** return a STACK of the ciphers available for the SSL and in order of
2468 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
2471 if (s->cipher_list_by_id != NULL) {
2472 return s->cipher_list_by_id;
2473 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
2474 return s->ctx->cipher_list_by_id;
2480 /** The old interface to get the same thing as SSL_get_ciphers() */
2481 const char *SSL_get_cipher_list(const SSL *s, int n)
2483 const SSL_CIPHER *c;
2484 STACK_OF(SSL_CIPHER) *sk;
2488 sk = SSL_get_ciphers(s);
2489 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
2491 c = sk_SSL_CIPHER_value(sk, n);
2497 /** return a STACK of the ciphers available for the SSL_CTX and in order of
2499 STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
2502 return ctx->cipher_list;
2506 /** specify the ciphers to be used by default by the SSL_CTX */
2507 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
2509 STACK_OF(SSL_CIPHER) *sk;
2511 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list,
2512 &ctx->cipher_list_by_id, str, ctx->cert);
2514 * ssl_create_cipher_list may return an empty stack if it was unable to
2515 * find a cipher matching the given rule string (for example if the rule
2516 * string specifies a cipher which has been disabled). This is not an
2517 * error as far as ssl_create_cipher_list is concerned, and hence
2518 * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
2522 else if (sk_SSL_CIPHER_num(sk) == 0) {
2523 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2529 /** specify the ciphers to be used by the SSL */
2530 int SSL_set_cipher_list(SSL *s, const char *str)
2532 STACK_OF(SSL_CIPHER) *sk;
2534 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list,
2535 &s->cipher_list_by_id, str, s->cert);
2536 /* see comment in SSL_CTX_set_cipher_list */
2539 else if (sk_SSL_CIPHER_num(sk) == 0) {
2540 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2546 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len)
2549 STACK_OF(SSL_CIPHER) *sk;
2550 const SSL_CIPHER *c;
2553 if ((s->session == NULL) || (s->session->ciphers == NULL) || (len < 2))
2557 sk = s->session->ciphers;
2559 if (sk_SSL_CIPHER_num(sk) == 0)
2562 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
2565 c = sk_SSL_CIPHER_value(sk, i);
2566 n = strlen(c->name);
2582 /** return a servername extension value if provided in Client Hello, or NULL.
2583 * So far, only host_name types are defined (RFC 3546).
2586 const char *SSL_get_servername(const SSL *s, const int type)
2588 if (type != TLSEXT_NAMETYPE_host_name)
2591 return s->session && !s->ext.hostname ?
2592 s->session->ext.hostname : s->ext.hostname;
2595 int SSL_get_servername_type(const SSL *s)
2598 && (!s->ext.hostname ? s->session->
2599 ext.hostname : s->ext.hostname))
2600 return TLSEXT_NAMETYPE_host_name;
2605 * SSL_select_next_proto implements the standard protocol selection. It is
2606 * expected that this function is called from the callback set by
2607 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
2608 * vector of 8-bit, length prefixed byte strings. The length byte itself is
2609 * not included in the length. A byte string of length 0 is invalid. No byte
2610 * string may be truncated. The current, but experimental algorithm for
2611 * selecting the protocol is: 1) If the server doesn't support NPN then this
2612 * is indicated to the callback. In this case, the client application has to
2613 * abort the connection or have a default application level protocol. 2) If
2614 * the server supports NPN, but advertises an empty list then the client
2615 * selects the first protocol in its list, but indicates via the API that this
2616 * fallback case was enacted. 3) Otherwise, the client finds the first
2617 * protocol in the server's list that it supports and selects this protocol.
2618 * This is because it's assumed that the server has better information about
2619 * which protocol a client should use. 4) If the client doesn't support any
2620 * of the server's advertised protocols, then this is treated the same as
2621 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
2622 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
2624 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
2625 const unsigned char *server,
2626 unsigned int server_len,
2627 const unsigned char *client, unsigned int client_len)
2630 const unsigned char *result;
2631 int status = OPENSSL_NPN_UNSUPPORTED;
2634 * For each protocol in server preference order, see if we support it.
2636 for (i = 0; i < server_len;) {
2637 for (j = 0; j < client_len;) {
2638 if (server[i] == client[j] &&
2639 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
2640 /* We found a match */
2641 result = &server[i];
2642 status = OPENSSL_NPN_NEGOTIATED;
2652 /* There's no overlap between our protocols and the server's list. */
2654 status = OPENSSL_NPN_NO_OVERLAP;
2657 *out = (unsigned char *)result + 1;
2658 *outlen = result[0];
2662 #ifndef OPENSSL_NO_NEXTPROTONEG
2664 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
2665 * client's requested protocol for this connection and returns 0. If the
2666 * client didn't request any protocol, then *data is set to NULL. Note that
2667 * the client can request any protocol it chooses. The value returned from
2668 * this function need not be a member of the list of supported protocols
2669 * provided by the callback.
2671 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
2678 *len = (unsigned int)s->ext.npn_len;
2683 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
2684 * a TLS server needs a list of supported protocols for Next Protocol
2685 * Negotiation. The returned list must be in wire format. The list is
2686 * returned by setting |out| to point to it and |outlen| to its length. This
2687 * memory will not be modified, but one should assume that the SSL* keeps a
2688 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
2689 * wishes to advertise. Otherwise, no such extension will be included in the
2692 void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
2693 SSL_CTX_npn_advertised_cb_func cb,
2696 ctx->ext.npn_advertised_cb = cb;
2697 ctx->ext.npn_advertised_cb_arg = arg;
2701 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
2702 * client needs to select a protocol from the server's provided list. |out|
2703 * must be set to point to the selected protocol (which may be within |in|).
2704 * The length of the protocol name must be written into |outlen|. The
2705 * server's advertised protocols are provided in |in| and |inlen|. The
2706 * callback can assume that |in| is syntactically valid. The client must
2707 * select a protocol. It is fatal to the connection if this callback returns
2708 * a value other than SSL_TLSEXT_ERR_OK.
2710 void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
2711 SSL_CTX_npn_select_cb_func cb,
2714 ctx->ext.npn_select_cb = cb;
2715 ctx->ext.npn_select_cb_arg = arg;
2720 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
2721 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2722 * length-prefixed strings). Returns 0 on success.
2724 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
2725 unsigned int protos_len)
2727 OPENSSL_free(ctx->ext.alpn);
2728 ctx->ext.alpn = OPENSSL_memdup(protos, protos_len);
2729 if (ctx->ext.alpn == NULL) {
2730 SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2733 ctx->ext.alpn_len = protos_len;
2739 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
2740 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2741 * length-prefixed strings). Returns 0 on success.
2743 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
2744 unsigned int protos_len)
2746 OPENSSL_free(ssl->ext.alpn);
2747 ssl->ext.alpn = OPENSSL_memdup(protos, protos_len);
2748 if (ssl->ext.alpn == NULL) {
2749 SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2752 ssl->ext.alpn_len = protos_len;
2758 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
2759 * called during ClientHello processing in order to select an ALPN protocol
2760 * from the client's list of offered protocols.
2762 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
2763 SSL_CTX_alpn_select_cb_func cb,
2766 ctx->ext.alpn_select_cb = cb;
2767 ctx->ext.alpn_select_cb_arg = arg;
2771 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
2772 * On return it sets |*data| to point to |*len| bytes of protocol name
2773 * (not including the leading length-prefix byte). If the server didn't
2774 * respond with a negotiated protocol then |*len| will be zero.
2776 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
2781 *data = ssl->s3->alpn_selected;
2785 *len = (unsigned int)ssl->s3->alpn_selected_len;
2788 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
2789 const char *label, size_t llen,
2790 const unsigned char *context, size_t contextlen,
2793 if (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER)
2796 return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
2798 contextlen, use_context);
2801 static unsigned long ssl_session_hash(const SSL_SESSION *a)
2803 const unsigned char *session_id = a->session_id;
2805 unsigned char tmp_storage[4];
2807 if (a->session_id_length < sizeof(tmp_storage)) {
2808 memset(tmp_storage, 0, sizeof(tmp_storage));
2809 memcpy(tmp_storage, a->session_id, a->session_id_length);
2810 session_id = tmp_storage;
2814 ((unsigned long)session_id[0]) |
2815 ((unsigned long)session_id[1] << 8L) |
2816 ((unsigned long)session_id[2] << 16L) |
2817 ((unsigned long)session_id[3] << 24L);
2822 * NB: If this function (or indeed the hash function which uses a sort of
2823 * coarser function than this one) is changed, ensure
2824 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
2825 * being able to construct an SSL_SESSION that will collide with any existing
2826 * session with a matching session ID.
2828 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
2830 if (a->ssl_version != b->ssl_version)
2832 if (a->session_id_length != b->session_id_length)
2834 return memcmp(a->session_id, b->session_id, a->session_id_length);
2838 * These wrapper functions should remain rather than redeclaring
2839 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
2840 * variable. The reason is that the functions aren't static, they're exposed
2844 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
2846 SSL_CTX *ret = NULL;
2849 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED);
2853 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
2856 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
2857 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
2860 ret = OPENSSL_zalloc(sizeof(*ret));
2865 ret->min_proto_version = 0;
2866 ret->max_proto_version = 0;
2867 ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
2868 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
2869 /* We take the system default. */
2870 ret->session_timeout = meth->get_timeout();
2871 ret->references = 1;
2872 ret->lock = CRYPTO_THREAD_lock_new();
2873 if (ret->lock == NULL) {
2874 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
2878 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
2879 ret->verify_mode = SSL_VERIFY_NONE;
2880 if ((ret->cert = ssl_cert_new()) == NULL)
2883 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
2884 if (ret->sessions == NULL)
2886 ret->cert_store = X509_STORE_new();
2887 if (ret->cert_store == NULL)
2889 #ifndef OPENSSL_NO_CT
2890 ret->ctlog_store = CTLOG_STORE_new();
2891 if (ret->ctlog_store == NULL)
2894 if (!ssl_create_cipher_list(ret->method,
2895 &ret->cipher_list, &ret->cipher_list_by_id,
2896 SSL_DEFAULT_CIPHER_LIST, ret->cert)
2897 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
2898 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS);
2902 ret->param = X509_VERIFY_PARAM_new();
2903 if (ret->param == NULL)
2906 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
2907 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
2910 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) {
2911 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
2915 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL)
2918 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
2921 /* No compression for DTLS */
2922 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
2923 ret->comp_methods = SSL_COMP_get_compression_methods();
2925 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2926 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2928 /* Setup RFC5077 ticket keys */
2929 if ((RAND_bytes(ret->ext.tick_key_name,
2930 sizeof(ret->ext.tick_key_name)) <= 0)
2931 || (RAND_bytes(ret->ext.tick_hmac_key,
2932 sizeof(ret->ext.tick_hmac_key)) <= 0)
2933 || (RAND_bytes(ret->ext.tick_aes_key,
2934 sizeof(ret->ext.tick_aes_key)) <= 0))
2935 ret->options |= SSL_OP_NO_TICKET;
2937 #ifndef OPENSSL_NO_SRP
2938 if (!SSL_CTX_SRP_CTX_init(ret))
2941 #ifndef OPENSSL_NO_ENGINE
2942 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2943 # define eng_strx(x) #x
2944 # define eng_str(x) eng_strx(x)
2945 /* Use specific client engine automatically... ignore errors */
2948 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2951 ENGINE_load_builtin_engines();
2952 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2954 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2960 * Default is to connect to non-RI servers. When RI is more widely
2961 * deployed might change this.
2963 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2965 * Disable compression by default to prevent CRIME. Applications can
2966 * re-enable compression by configuring
2967 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
2968 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3
2969 * middlebox compatibility by default. This may be disabled by default in
2970 * a later OpenSSL version.
2972 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT;
2974 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
2977 * Default max early data is a fully loaded single record. Could be split
2978 * across multiple records in practice
2980 ret->max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
2984 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
2990 int SSL_CTX_up_ref(SSL_CTX *ctx)
2994 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
2997 REF_PRINT_COUNT("SSL_CTX", ctx);
2998 REF_ASSERT_ISNT(i < 2);
2999 return ((i > 1) ? 1 : 0);
3002 void SSL_CTX_free(SSL_CTX *a)
3009 CRYPTO_DOWN_REF(&a->references, &i, a->lock);
3010 REF_PRINT_COUNT("SSL_CTX", a);
3013 REF_ASSERT_ISNT(i < 0);
3015 X509_VERIFY_PARAM_free(a->param);
3016 dane_ctx_final(&a->dane);
3019 * Free internal session cache. However: the remove_cb() may reference
3020 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
3021 * after the sessions were flushed.
3022 * As the ex_data handling routines might also touch the session cache,
3023 * the most secure solution seems to be: empty (flush) the cache, then
3024 * free ex_data, then finally free the cache.
3025 * (See ticket [openssl.org #212].)
3027 if (a->sessions != NULL)
3028 SSL_CTX_flush_sessions(a, 0);
3030 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
3031 lh_SSL_SESSION_free(a->sessions);
3032 X509_STORE_free(a->cert_store);
3033 #ifndef OPENSSL_NO_CT
3034 CTLOG_STORE_free(a->ctlog_store);
3036 sk_SSL_CIPHER_free(a->cipher_list);
3037 sk_SSL_CIPHER_free(a->cipher_list_by_id);
3038 ssl_cert_free(a->cert);
3039 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free);
3040 sk_X509_pop_free(a->extra_certs, X509_free);
3041 a->comp_methods = NULL;
3042 #ifndef OPENSSL_NO_SRTP
3043 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
3045 #ifndef OPENSSL_NO_SRP
3046 SSL_CTX_SRP_CTX_free(a);
3048 #ifndef OPENSSL_NO_ENGINE
3049 ENGINE_finish(a->client_cert_engine);
3052 #ifndef OPENSSL_NO_EC
3053 OPENSSL_free(a->ext.ecpointformats);
3054 OPENSSL_free(a->ext.supportedgroups);
3056 OPENSSL_free(a->ext.alpn);
3058 CRYPTO_THREAD_lock_free(a->lock);
3063 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
3065 ctx->default_passwd_callback = cb;
3068 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
3070 ctx->default_passwd_callback_userdata = u;
3073 pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
3075 return ctx->default_passwd_callback;
3078 void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
3080 return ctx->default_passwd_callback_userdata;
3083 void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
3085 s->default_passwd_callback = cb;
3088 void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
3090 s->default_passwd_callback_userdata = u;
3093 pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
3095 return s->default_passwd_callback;
3098 void *SSL_get_default_passwd_cb_userdata(SSL *s)
3100 return s->default_passwd_callback_userdata;
3103 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
3104 int (*cb) (X509_STORE_CTX *, void *),
3107 ctx->app_verify_callback = cb;
3108 ctx->app_verify_arg = arg;
3111 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
3112 int (*cb) (int, X509_STORE_CTX *))
3114 ctx->verify_mode = mode;
3115 ctx->default_verify_callback = cb;
3118 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
3120 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
3123 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
3125 ssl_cert_set_cert_cb(c->cert, cb, arg);
3128 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
3130 ssl_cert_set_cert_cb(s->cert, cb, arg);
3133 void ssl_set_masks(SSL *s)
3136 uint32_t *pvalid = s->s3->tmp.valid_flags;
3137 int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
3138 unsigned long mask_k, mask_a;
3139 #ifndef OPENSSL_NO_EC
3140 int have_ecc_cert, ecdsa_ok;
3145 #ifndef OPENSSL_NO_DH
3146 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
3151 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3152 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3153 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
3154 #ifndef OPENSSL_NO_EC
3155 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
3161 fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n",
3162 dh_tmp, rsa_enc, rsa_sign, dsa_sign);
3165 #ifndef OPENSSL_NO_GOST
3166 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
3167 mask_k |= SSL_kGOST;
3168 mask_a |= SSL_aGOST12;
3170 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
3171 mask_k |= SSL_kGOST;
3172 mask_a |= SSL_aGOST12;
3174 if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
3175 mask_k |= SSL_kGOST;
3176 mask_a |= SSL_aGOST01;
3187 * If we only have an RSA-PSS certificate allow RSA authentication
3188 * if TLS 1.2 and peer supports it.
3191 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN)
3192 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN
3193 && TLS1_get_version(s) == TLS1_2_VERSION))
3200 mask_a |= SSL_aNULL;
3203 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
3204 * depending on the key usage extension.
3206 #ifndef OPENSSL_NO_EC
3207 if (have_ecc_cert) {
3209 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
3210 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
3211 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
3214 mask_a |= SSL_aECDSA;
3216 /* Allow Ed25519 for TLS 1.2 if peer supports it */
3217 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519)
3218 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
3219 && TLS1_get_version(s) == TLS1_2_VERSION)
3220 mask_a |= SSL_aECDSA;
3223 #ifndef OPENSSL_NO_EC
3224 mask_k |= SSL_kECDHE;
3227 #ifndef OPENSSL_NO_PSK
3230 if (mask_k & SSL_kRSA)
3231 mask_k |= SSL_kRSAPSK;
3232 if (mask_k & SSL_kDHE)
3233 mask_k |= SSL_kDHEPSK;
3234 if (mask_k & SSL_kECDHE)
3235 mask_k |= SSL_kECDHEPSK;
3238 s->s3->tmp.mask_k = mask_k;
3239 s->s3->tmp.mask_a = mask_a;
3242 #ifndef OPENSSL_NO_EC
3244 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
3246 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
3247 /* key usage, if present, must allow signing */
3248 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
3249 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
3250 SSL_R_ECC_CERT_NOT_FOR_SIGNING);
3254 return 1; /* all checks are ok */
3259 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
3260 size_t *serverinfo_length)
3262 CERT_PKEY *cpk = s->s3->tmp.cert;
3263 *serverinfo_length = 0;
3265 if (cpk == NULL || cpk->serverinfo == NULL)
3268 *serverinfo = cpk->serverinfo;
3269 *serverinfo_length = cpk->serverinfo_length;
3273 void ssl_update_cache(SSL *s, int mode)
3278 * If the session_id_length is 0, we are not supposed to cache it, and it
3279 * would be rather hard to do anyway :-)
3281 if (s->session->session_id_length == 0)
3284 i = s->session_ctx->session_cache_mode;
3286 && (!s->hit || SSL_IS_TLS13(s))
3287 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) != 0
3288 || SSL_CTX_add_session(s->session_ctx, s->session))
3289 && s->session_ctx->new_session_cb != NULL) {
3290 SSL_SESSION_up_ref(s->session);
3291 if (!s->session_ctx->new_session_cb(s, s->session))
3292 SSL_SESSION_free(s->session);
3295 /* auto flush every 255 connections */
3296 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
3298 if (mode & SSL_SESS_CACHE_CLIENT)
3299 stat = &s->session_ctx->stats.sess_connect_good;
3301 stat = &s->session_ctx->stats.sess_accept_good;
3302 if (CRYPTO_atomic_read(stat, &val, s->session_ctx->lock)
3303 && (val & 0xff) == 0xff)
3304 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
3308 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
3313 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
3318 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
3322 if (s->method != meth) {
3323 const SSL_METHOD *sm = s->method;
3324 int (*hf) (SSL *) = s->handshake_func;
3326 if (sm->version == meth->version)
3331 ret = s->method->ssl_new(s);
3334 if (hf == sm->ssl_connect)
3335 s->handshake_func = meth->ssl_connect;
3336 else if (hf == sm->ssl_accept)
3337 s->handshake_func = meth->ssl_accept;
3342 int SSL_get_error(const SSL *s, int i)
3349 return SSL_ERROR_NONE;
3352 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
3353 * where we do encode the error
3355 if ((l = ERR_peek_error()) != 0) {
3356 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
3357 return SSL_ERROR_SYSCALL;
3359 return SSL_ERROR_SSL;
3362 if (SSL_want_read(s)) {
3363 bio = SSL_get_rbio(s);
3364 if (BIO_should_read(bio))
3365 return SSL_ERROR_WANT_READ;
3366 else if (BIO_should_write(bio))
3368 * This one doesn't make too much sense ... We never try to write
3369 * to the rbio, and an application program where rbio and wbio
3370 * are separate couldn't even know what it should wait for.
3371 * However if we ever set s->rwstate incorrectly (so that we have
3372 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
3373 * wbio *are* the same, this test works around that bug; so it
3374 * might be safer to keep it.
3376 return SSL_ERROR_WANT_WRITE;
3377 else if (BIO_should_io_special(bio)) {
3378 reason = BIO_get_retry_reason(bio);
3379 if (reason == BIO_RR_CONNECT)
3380 return SSL_ERROR_WANT_CONNECT;
3381 else if (reason == BIO_RR_ACCEPT)
3382 return SSL_ERROR_WANT_ACCEPT;
3384 return SSL_ERROR_SYSCALL; /* unknown */
3388 if (SSL_want_write(s)) {
3389 /* Access wbio directly - in order to use the buffered bio if present */
3391 if (BIO_should_write(bio))
3392 return SSL_ERROR_WANT_WRITE;
3393 else if (BIO_should_read(bio))
3395 * See above (SSL_want_read(s) with BIO_should_write(bio))
3397 return SSL_ERROR_WANT_READ;
3398 else if (BIO_should_io_special(bio)) {
3399 reason = BIO_get_retry_reason(bio);
3400 if (reason == BIO_RR_CONNECT)
3401 return SSL_ERROR_WANT_CONNECT;
3402 else if (reason == BIO_RR_ACCEPT)
3403 return SSL_ERROR_WANT_ACCEPT;
3405 return SSL_ERROR_SYSCALL;
3408 if (SSL_want_x509_lookup(s))
3409 return SSL_ERROR_WANT_X509_LOOKUP;
3410 if (SSL_want_async(s))
3411 return SSL_ERROR_WANT_ASYNC;
3412 if (SSL_want_async_job(s))
3413 return SSL_ERROR_WANT_ASYNC_JOB;
3414 if (SSL_want_client_hello_cb(s))
3415 return SSL_ERROR_WANT_CLIENT_HELLO_CB;
3417 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
3418 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
3419 return SSL_ERROR_ZERO_RETURN;
3421 return SSL_ERROR_SYSCALL;
3424 static int ssl_do_handshake_intern(void *vargs)
3426 struct ssl_async_args *args;
3429 args = (struct ssl_async_args *)vargs;
3432 return s->handshake_func(s);
3435 int SSL_do_handshake(SSL *s)
3439 if (s->handshake_func == NULL) {
3440 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET);
3444 ossl_statem_check_finish_init(s, -1);
3446 s->method->ssl_renegotiate_check(s, 0);
3448 if (SSL_is_server(s)) {
3449 /* clear SNI settings at server-side */
3450 OPENSSL_free(s->ext.hostname);
3451 s->ext.hostname = NULL;
3454 if (SSL_in_init(s) || SSL_in_before(s)) {
3455 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
3456 struct ssl_async_args args;
3460 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
3462 ret = s->handshake_func(s);
3468 void SSL_set_accept_state(SSL *s)
3472 ossl_statem_clear(s);
3473 s->handshake_func = s->method->ssl_accept;
3477 void SSL_set_connect_state(SSL *s)
3481 ossl_statem_clear(s);
3482 s->handshake_func = s->method->ssl_connect;
3486 int ssl_undefined_function(SSL *s)
3488 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3492 int ssl_undefined_void_function(void)
3494 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
3495 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3499 int ssl_undefined_const_function(const SSL *s)
3504 const SSL_METHOD *ssl_bad_method(int ver)
3506 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3510 const char *ssl_protocol_to_string(int version)
3514 case TLS1_3_VERSION:
3517 case TLS1_2_VERSION:
3520 case TLS1_1_VERSION:
3535 case DTLS1_2_VERSION:
3543 const char *SSL_get_version(const SSL *s)
3545 return ssl_protocol_to_string(s->version);
3548 SSL *SSL_dup(SSL *s)
3550 STACK_OF(X509_NAME) *sk;
3555 /* If we're not quiescent, just up_ref! */
3556 if (!SSL_in_init(s) || !SSL_in_before(s)) {
3557 CRYPTO_UP_REF(&s->references, &i, s->lock);
3562 * Otherwise, copy configuration state, and session if set.
3564 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
3567 if (s->session != NULL) {
3569 * Arranges to share the same session via up_ref. This "copies"
3570 * session-id, SSL_METHOD, sid_ctx, and 'cert'
3572 if (!SSL_copy_session_id(ret, s))
3576 * No session has been established yet, so we have to expect that
3577 * s->cert or ret->cert will be changed later -- they should not both
3578 * point to the same object, and thus we can't use
3579 * SSL_copy_session_id.
3581 if (!SSL_set_ssl_method(ret, s->method))
3584 if (s->cert != NULL) {
3585 ssl_cert_free(ret->cert);
3586 ret->cert = ssl_cert_dup(s->cert);
3587 if (ret->cert == NULL)
3591 if (!SSL_set_session_id_context(ret, s->sid_ctx,
3592 (int)s->sid_ctx_length))
3596 if (!ssl_dane_dup(ret, s))
3598 ret->version = s->version;
3599 ret->options = s->options;
3600 ret->mode = s->mode;
3601 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
3602 SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
3603 ret->msg_callback = s->msg_callback;
3604 ret->msg_callback_arg = s->msg_callback_arg;
3605 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
3606 SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
3607 ret->generate_session_id = s->generate_session_id;
3609 SSL_set_info_callback(ret, SSL_get_info_callback(s));
3611 /* copy app data, a little dangerous perhaps */
3612 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
3615 /* setup rbio, and wbio */
3616 if (s->rbio != NULL) {
3617 if (!BIO_dup_state(s->rbio, (char *)&ret->rbio))
3620 if (s->wbio != NULL) {
3621 if (s->wbio != s->rbio) {
3622 if (!BIO_dup_state(s->wbio, (char *)&ret->wbio))
3625 BIO_up_ref(ret->rbio);
3626 ret->wbio = ret->rbio;
3630 ret->server = s->server;
3631 if (s->handshake_func) {
3633 SSL_set_accept_state(ret);
3635 SSL_set_connect_state(ret);
3637 ret->shutdown = s->shutdown;
3640 ret->default_passwd_callback = s->default_passwd_callback;
3641 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;
3643 X509_VERIFY_PARAM_inherit(ret->param, s->param);
3645 /* dup the cipher_list and cipher_list_by_id stacks */
3646 if (s->cipher_list != NULL) {
3647 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
3650 if (s->cipher_list_by_id != NULL)
3651 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id))
3655 /* Dup the client_CA list */
3656 if (s->ca_names != NULL) {
3657 if ((sk = sk_X509_NAME_dup(s->ca_names)) == NULL)
3660 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
3661 xn = sk_X509_NAME_value(sk, i);
3662 if (sk_X509_NAME_set(sk, i, X509_NAME_dup(xn)) == NULL) {
3675 void ssl_clear_cipher_ctx(SSL *s)
3677 if (s->enc_read_ctx != NULL) {
3678 EVP_CIPHER_CTX_free(s->enc_read_ctx);
3679 s->enc_read_ctx = NULL;
3681 if (s->enc_write_ctx != NULL) {
3682 EVP_CIPHER_CTX_free(s->enc_write_ctx);
3683 s->enc_write_ctx = NULL;
3685 #ifndef OPENSSL_NO_COMP
3686 COMP_CTX_free(s->expand);
3688 COMP_CTX_free(s->compress);
3693 X509 *SSL_get_certificate(const SSL *s)
3695 if (s->cert != NULL)
3696 return s->cert->key->x509;
3701 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3703 if (s->cert != NULL)
3704 return s->cert->key->privatekey;
3709 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3711 if (ctx->cert != NULL)
3712 return ctx->cert->key->x509;
3717 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3719 if (ctx->cert != NULL)
3720 return ctx->cert->key->privatekey;
3725 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3727 if ((s->session != NULL) && (s->session->cipher != NULL))
3728 return s->session->cipher;
3732 const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s)
3734 return s->s3->tmp.new_cipher;
3737 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3739 #ifndef OPENSSL_NO_COMP
3740 return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
3746 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3748 #ifndef OPENSSL_NO_COMP
3749 return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
3755 int ssl_init_wbio_buffer(SSL *s)
3759 if (s->bbio != NULL) {
3760 /* Already buffered. */
3764 bbio = BIO_new(BIO_f_buffer());
3765 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) {
3767 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB);
3771 s->wbio = BIO_push(bbio, s->wbio);
3776 int ssl_free_wbio_buffer(SSL *s)
3778 /* callers ensure s is never null */
3779 if (s->bbio == NULL)
3782 s->wbio = BIO_pop(s->wbio);
3783 if (!ossl_assert(s->wbio != NULL))
3791 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
3793 ctx->quiet_shutdown = mode;
3796 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3798 return ctx->quiet_shutdown;
3801 void SSL_set_quiet_shutdown(SSL *s, int mode)
3803 s->quiet_shutdown = mode;
3806 int SSL_get_quiet_shutdown(const SSL *s)
3808 return s->quiet_shutdown;
3811 void SSL_set_shutdown(SSL *s, int mode)
3816 int SSL_get_shutdown(const SSL *s)
3821 int SSL_version(const SSL *s)
3826 int SSL_client_version(const SSL *s)
3828 return s->client_version;
3831 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3836 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
3839 if (ssl->ctx == ctx)
3842 ctx = ssl->session_ctx;
3843 new_cert = ssl_cert_dup(ctx->cert);
3844 if (new_cert == NULL) {
3848 if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) {
3849 ssl_cert_free(new_cert);
3853 ssl_cert_free(ssl->cert);
3854 ssl->cert = new_cert;
3857 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
3858 * so setter APIs must prevent invalid lengths from entering the system.
3860 if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)))
3864 * If the session ID context matches that of the parent SSL_CTX,
3865 * inherit it from the new SSL_CTX as well. If however the context does
3866 * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
3867 * leave it unchanged.
3869 if ((ssl->ctx != NULL) &&
3870 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
3871 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) {
3872 ssl->sid_ctx_length = ctx->sid_ctx_length;
3873 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
3876 SSL_CTX_up_ref(ctx);
3877 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3883 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3885 return X509_STORE_set_default_paths(ctx->cert_store);
3888 int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
3890 X509_LOOKUP *lookup;
3892 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
3895 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
3897 /* Clear any errors if the default directory does not exist */
3903 int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
3905 X509_LOOKUP *lookup;
3907 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
3911 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
3913 /* Clear any errors if the default file does not exist */
3919 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3922 return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath);
3925 void SSL_set_info_callback(SSL *ssl,
3926 void (*cb) (const SSL *ssl, int type, int val))
3928 ssl->info_callback = cb;
3932 * One compiler (Diab DCC) doesn't like argument names in returned function
3935 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
3938 return ssl->info_callback;
3941 void SSL_set_verify_result(SSL *ssl, long arg)
3943 ssl->verify_result = arg;
3946 long SSL_get_verify_result(const SSL *ssl)
3948 return ssl->verify_result;
3951 size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
3954 return sizeof(ssl->s3->client_random);
3955 if (outlen > sizeof(ssl->s3->client_random))
3956 outlen = sizeof(ssl->s3->client_random);
3957 memcpy(out, ssl->s3->client_random, outlen);
3961 size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
3964 return sizeof(ssl->s3->server_random);
3965 if (outlen > sizeof(ssl->s3->server_random))
3966 outlen = sizeof(ssl->s3->server_random);
3967 memcpy(out, ssl->s3->server_random, outlen);
3971 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
3972 unsigned char *out, size_t outlen)
3975 return session->master_key_length;
3976 if (outlen > session->master_key_length)
3977 outlen = session->master_key_length;
3978 memcpy(out, session->master_key, outlen);
3982 int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in,
3985 if (len > sizeof(sess->master_key))
3988 memcpy(sess->master_key, in, len);
3989 sess->master_key_length = len;
3994 int SSL_set_ex_data(SSL *s, int idx, void *arg)
3996 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
3999 void *SSL_get_ex_data(const SSL *s, int idx)
4001 return CRYPTO_get_ex_data(&s->ex_data, idx);
4004 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
4006 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4009 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
4011 return CRYPTO_get_ex_data(&s->ex_data, idx);
4014 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
4016 return ctx->cert_store;
4019 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
4021 X509_STORE_free(ctx->cert_store);
4022 ctx->cert_store = store;
4025 void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
4028 X509_STORE_up_ref(store);
4029 SSL_CTX_set_cert_store(ctx, store);
4032 int SSL_want(const SSL *s)
4038 * \brief Set the callback for generating temporary DH keys.
4039 * \param ctx the SSL context.
4040 * \param dh the callback
4043 #ifndef OPENSSL_NO_DH
4044 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
4045 DH *(*dh) (SSL *ssl, int is_export,
4048 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4051 void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export,
4054 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4058 #ifndef OPENSSL_NO_PSK
4059 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
4061 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4062 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4065 OPENSSL_free(ctx->cert->psk_identity_hint);
4066 if (identity_hint != NULL) {
4067 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4068 if (ctx->cert->psk_identity_hint == NULL)
4071 ctx->cert->psk_identity_hint = NULL;
4075 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
4080 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4081 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4084 OPENSSL_free(s->cert->psk_identity_hint);
4085 if (identity_hint != NULL) {
4086 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4087 if (s->cert->psk_identity_hint == NULL)
4090 s->cert->psk_identity_hint = NULL;
4094 const char *SSL_get_psk_identity_hint(const SSL *s)
4096 if (s == NULL || s->session == NULL)
4098 return s->session->psk_identity_hint;
4101 const char *SSL_get_psk_identity(const SSL *s)
4103 if (s == NULL || s->session == NULL)
4105 return s->session->psk_identity;
4108 void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
4110 s->psk_client_callback = cb;
4113 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
4115 ctx->psk_client_callback = cb;
4118 void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
4120 s->psk_server_callback = cb;
4123 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
4125 ctx->psk_server_callback = cb;
4129 void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb)
4131 s->psk_find_session_cb = cb;
4134 void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
4135 SSL_psk_find_session_cb_func cb)
4137 ctx->psk_find_session_cb = cb;
4140 void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
4142 s->psk_use_session_cb = cb;
4145 void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx,
4146 SSL_psk_use_session_cb_func cb)
4148 ctx->psk_use_session_cb = cb;
4151 void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
4152 void (*cb) (int write_p, int version,
4153 int content_type, const void *buf,
4154 size_t len, SSL *ssl, void *arg))
4156 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4159 void SSL_set_msg_callback(SSL *ssl,
4160 void (*cb) (int write_p, int version,
4161 int content_type, const void *buf,
4162 size_t len, SSL *ssl, void *arg))
4164 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4167 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
4168 int (*cb) (SSL *ssl,
4172 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4173 (void (*)(void))cb);
4176 void SSL_set_not_resumable_session_callback(SSL *ssl,
4177 int (*cb) (SSL *ssl,
4178 int is_forward_secure))
4180 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4181 (void (*)(void))cb);
4184 void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx,
4185 size_t (*cb) (SSL *ssl, int type,
4186 size_t len, void *arg))
4188 ctx->record_padding_cb = cb;
4191 void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg)
4193 ctx->record_padding_arg = arg;
4196 void *SSL_CTX_get_record_padding_callback_arg(SSL_CTX *ctx)
4198 return ctx->record_padding_arg;
4201 int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size)
4203 /* block size of 0 or 1 is basically no padding */
4204 if (block_size == 1)
4205 ctx->block_padding = 0;
4206 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4207 ctx->block_padding = block_size;
4213 void SSL_set_record_padding_callback(SSL *ssl,
4214 size_t (*cb) (SSL *ssl, int type,
4215 size_t len, void *arg))
4217 ssl->record_padding_cb = cb;
4220 void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg)
4222 ssl->record_padding_arg = arg;
4225 void *SSL_get_record_padding_callback_arg(SSL *ssl)
4227 return ssl->record_padding_arg;
4230 int SSL_set_block_padding(SSL *ssl, size_t block_size)
4232 /* block size of 0 or 1 is basically no padding */
4233 if (block_size == 1)
4234 ssl->block_padding = 0;
4235 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4236 ssl->block_padding = block_size;
4243 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
4244 * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
4245 * If EVP_MD pointer is passed, initializes ctx with this |md|.
4246 * Returns the newly allocated ctx;
4249 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
4251 ssl_clear_hash_ctx(hash);
4252 *hash = EVP_MD_CTX_new();
4253 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
4254 EVP_MD_CTX_free(*hash);
4261 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
4264 EVP_MD_CTX_free(*hash);
4268 /* Retrieve handshake hashes */
4269 int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
4272 EVP_MD_CTX *ctx = NULL;
4273 EVP_MD_CTX *hdgst = s->s3->handshake_dgst;
4274 int hashleni = EVP_MD_CTX_size(hdgst);
4277 if (hashleni < 0 || (size_t)hashleni > outlen) {
4278 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4279 ERR_R_INTERNAL_ERROR);
4283 ctx = EVP_MD_CTX_new();
4287 if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
4288 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) {
4289 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4290 ERR_R_INTERNAL_ERROR);
4294 *hashlen = hashleni;
4298 EVP_MD_CTX_free(ctx);
4302 int SSL_session_reused(SSL *s)
4307 int SSL_is_server(const SSL *s)
4312 #if OPENSSL_API_COMPAT < 0x10100000L
4313 void SSL_set_debug(SSL *s, int debug)
4315 /* Old function was do-nothing anyway... */
4321 void SSL_set_security_level(SSL *s, int level)
4323 s->cert->sec_level = level;
4326 int SSL_get_security_level(const SSL *s)
4328 return s->cert->sec_level;
4331 void SSL_set_security_callback(SSL *s,
4332 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4333 int op, int bits, int nid,
4334 void *other, void *ex))
4336 s->cert->sec_cb = cb;
4339 int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
4340 const SSL_CTX *ctx, int op,
4341 int bits, int nid, void *other,
4343 return s->cert->sec_cb;
4346 void SSL_set0_security_ex_data(SSL *s, void *ex)
4348 s->cert->sec_ex = ex;
4351 void *SSL_get0_security_ex_data(const SSL *s)
4353 return s->cert->sec_ex;
4356 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
4358 ctx->cert->sec_level = level;
4361 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
4363 return ctx->cert->sec_level;
4366 void SSL_CTX_set_security_callback(SSL_CTX *ctx,
4367 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4368 int op, int bits, int nid,
4369 void *other, void *ex))
4371 ctx->cert->sec_cb = cb;
4374 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
4380 return ctx->cert->sec_cb;
4383 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
4385 ctx->cert->sec_ex = ex;
4388 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
4390 return ctx->cert->sec_ex;
4394 * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that
4395 * can return unsigned long, instead of the generic long return value from the
4396 * control interface.
4398 unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
4400 return ctx->options;
4403 unsigned long SSL_get_options(const SSL *s)
4408 unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op)
4410 return ctx->options |= op;
4413 unsigned long SSL_set_options(SSL *s, unsigned long op)
4415 return s->options |= op;
4418 unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op)
4420 return ctx->options &= ~op;
4423 unsigned long SSL_clear_options(SSL *s, unsigned long op)
4425 return s->options &= ~op;
4428 STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
4430 return s->verified_chain;
4433 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
4435 #ifndef OPENSSL_NO_CT
4438 * Moves SCTs from the |src| stack to the |dst| stack.
4439 * The source of each SCT will be set to |origin|.
4440 * If |dst| points to a NULL pointer, a new stack will be created and owned by
4442 * Returns the number of SCTs moved, or a negative integer if an error occurs.
4444 static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
4445 sct_source_t origin)
4451 *dst = sk_SCT_new_null();
4453 SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE);
4458 while ((sct = sk_SCT_pop(src)) != NULL) {
4459 if (SCT_set_source(sct, origin) != 1)
4462 if (sk_SCT_push(*dst, sct) <= 0)
4470 sk_SCT_push(src, sct); /* Put the SCT back */
4475 * Look for data collected during ServerHello and parse if found.
4476 * Returns the number of SCTs extracted.
4478 static int ct_extract_tls_extension_scts(SSL *s)
4480 int scts_extracted = 0;
4482 if (s->ext.scts != NULL) {
4483 const unsigned char *p = s->ext.scts;
4484 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
4486 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
4488 SCT_LIST_free(scts);
4491 return scts_extracted;
4495 * Checks for an OCSP response and then attempts to extract any SCTs found if it
4496 * contains an SCT X509 extension. They will be stored in |s->scts|.
4498 * - The number of SCTs extracted, assuming an OCSP response exists.
4499 * - 0 if no OCSP response exists or it contains no SCTs.
4500 * - A negative integer if an error occurs.
4502 static int ct_extract_ocsp_response_scts(SSL *s)
4504 # ifndef OPENSSL_NO_OCSP
4505 int scts_extracted = 0;
4506 const unsigned char *p;
4507 OCSP_BASICRESP *br = NULL;
4508 OCSP_RESPONSE *rsp = NULL;
4509 STACK_OF(SCT) *scts = NULL;
4512 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
4515 p = s->ext.ocsp.resp;
4516 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
4520 br = OCSP_response_get1_basic(rsp);
4524 for (i = 0; i < OCSP_resp_count(br); ++i) {
4525 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
4531 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
4533 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
4534 if (scts_extracted < 0)
4538 SCT_LIST_free(scts);
4539 OCSP_BASICRESP_free(br);
4540 OCSP_RESPONSE_free(rsp);
4541 return scts_extracted;
4543 /* Behave as if no OCSP response exists */
4549 * Attempts to extract SCTs from the peer certificate.
4550 * Return the number of SCTs extracted, or a negative integer if an error
4553 static int ct_extract_x509v3_extension_scts(SSL *s)
4555 int scts_extracted = 0;
4556 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4559 STACK_OF(SCT) *scts =
4560 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
4563 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
4565 SCT_LIST_free(scts);
4568 return scts_extracted;
4572 * Attempts to find all received SCTs by checking TLS extensions, the OCSP
4573 * response (if it exists) and X509v3 extensions in the certificate.
4574 * Returns NULL if an error occurs.
4576 const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
4578 if (!s->scts_parsed) {
4579 if (ct_extract_tls_extension_scts(s) < 0 ||
4580 ct_extract_ocsp_response_scts(s) < 0 ||
4581 ct_extract_x509v3_extension_scts(s) < 0)
4591 static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
4592 const STACK_OF(SCT) *scts, void *unused_arg)
4597 static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
4598 const STACK_OF(SCT) *scts, void *unused_arg)
4600 int count = scts != NULL ? sk_SCT_num(scts) : 0;
4603 for (i = 0; i < count; ++i) {
4604 SCT *sct = sk_SCT_value(scts, i);
4605 int status = SCT_get_validation_status(sct);
4607 if (status == SCT_VALIDATION_STATUS_VALID)
4610 SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS);
4614 int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
4618 * Since code exists that uses the custom extension handler for CT, look
4619 * for this and throw an error if they have already registered to use CT.
4621 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
4622 TLSEXT_TYPE_signed_certificate_timestamp))
4624 SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK,
4625 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4629 if (callback != NULL) {
4631 * If we are validating CT, then we MUST accept SCTs served via OCSP
4633 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
4637 s->ct_validation_callback = callback;
4638 s->ct_validation_callback_arg = arg;
4643 int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
4644 ssl_ct_validation_cb callback, void *arg)
4647 * Since code exists that uses the custom extension handler for CT, look for
4648 * this and throw an error if they have already registered to use CT.
4650 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
4651 TLSEXT_TYPE_signed_certificate_timestamp))
4653 SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK,
4654 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4658 ctx->ct_validation_callback = callback;
4659 ctx->ct_validation_callback_arg = arg;
4663 int SSL_ct_is_enabled(const SSL *s)
4665 return s->ct_validation_callback != NULL;
4668 int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
4670 return ctx->ct_validation_callback != NULL;
4673 int ssl_validate_ct(SSL *s)
4676 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4678 SSL_DANE *dane = &s->dane;
4679 CT_POLICY_EVAL_CTX *ctx = NULL;
4680 const STACK_OF(SCT) *scts;
4683 * If no callback is set, the peer is anonymous, or its chain is invalid,
4684 * skip SCT validation - just return success. Applications that continue
4685 * handshakes without certificates, with unverified chains, or pinned leaf
4686 * certificates are outside the scope of the WebPKI and CT.
4688 * The above exclusions notwithstanding the vast majority of peers will
4689 * have rather ordinary certificate chains validated by typical
4690 * applications that perform certificate verification and therefore will
4691 * process SCTs when enabled.
4693 if (s->ct_validation_callback == NULL || cert == NULL ||
4694 s->verify_result != X509_V_OK ||
4695 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
4699 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
4700 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2
4702 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
4703 switch (dane->mtlsa->usage) {
4704 case DANETLS_USAGE_DANE_TA:
4705 case DANETLS_USAGE_DANE_EE:
4710 ctx = CT_POLICY_EVAL_CTX_new();
4712 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_VALIDATE_CT,
4713 ERR_R_MALLOC_FAILURE);
4717 issuer = sk_X509_value(s->verified_chain, 1);
4718 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
4719 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
4720 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store);
4721 CT_POLICY_EVAL_CTX_set_time(
4722 ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000);
4724 scts = SSL_get0_peer_scts(s);
4727 * This function returns success (> 0) only when all the SCTs are valid, 0
4728 * when some are invalid, and < 0 on various internal errors (out of
4729 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient
4730 * reason to abort the handshake, that decision is up to the callback.
4731 * Therefore, we error out only in the unexpected case that the return
4732 * value is negative.
4734 * XXX: One might well argue that the return value of this function is an
4735 * unfortunate design choice. Its job is only to determine the validation
4736 * status of each of the provided SCTs. So long as it correctly separates
4737 * the wheat from the chaff it should return success. Failure in this case
4738 * ought to correspond to an inability to carry out its duties.
4740 if (SCT_LIST_validate(scts, ctx) < 0) {
4741 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
4742 SSL_R_SCT_VERIFICATION_FAILED);
4746 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
4748 ret = 0; /* This function returns 0 on failure */
4750 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
4751 SSL_R_CALLBACK_FAILED);
4754 CT_POLICY_EVAL_CTX_free(ctx);
4756 * With SSL_VERIFY_NONE the session may be cached and re-used despite a
4757 * failure return code here. Also the application may wish the complete
4758 * the handshake, and then disconnect cleanly at a higher layer, after
4759 * checking the verification status of the completed connection.
4761 * We therefore force a certificate verification failure which will be
4762 * visible via SSL_get_verify_result() and cached as part of any resumed
4765 * Note: the permissive callback is for information gathering only, always
4766 * returns success, and does not affect verification status. Only the
4767 * strict callback or a custom application-specified callback can trigger
4768 * connection failure or record a verification error.
4771 s->verify_result = X509_V_ERR_NO_VALID_SCTS;
4775 int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
4777 switch (validation_mode) {
4779 SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
4781 case SSL_CT_VALIDATION_PERMISSIVE:
4782 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
4783 case SSL_CT_VALIDATION_STRICT:
4784 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
4788 int SSL_enable_ct(SSL *s, int validation_mode)
4790 switch (validation_mode) {
4792 SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
4794 case SSL_CT_VALIDATION_PERMISSIVE:
4795 return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
4796 case SSL_CT_VALIDATION_STRICT:
4797 return SSL_set_ct_validation_callback(s, ct_strict, NULL);
4801 int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
4803 return CTLOG_STORE_load_default_file(ctx->ctlog_store);
4806 int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
4808 return CTLOG_STORE_load_file(ctx->ctlog_store, path);
4811 void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
4813 CTLOG_STORE_free(ctx->ctlog_store);
4814 ctx->ctlog_store = logs;
4817 const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
4819 return ctx->ctlog_store;
4822 #endif /* OPENSSL_NO_CT */
4824 void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb,
4827 c->client_hello_cb = cb;
4828 c->client_hello_cb_arg = arg;
4831 int SSL_client_hello_isv2(SSL *s)
4833 if (s->clienthello == NULL)
4835 return s->clienthello->isv2;
4838 unsigned int SSL_client_hello_get0_legacy_version(SSL *s)
4840 if (s->clienthello == NULL)
4842 return s->clienthello->legacy_version;
4845 size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out)
4847 if (s->clienthello == NULL)
4850 *out = s->clienthello->random;
4851 return SSL3_RANDOM_SIZE;
4854 size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out)
4856 if (s->clienthello == NULL)
4859 *out = s->clienthello->session_id;
4860 return s->clienthello->session_id_len;
4863 size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out)
4865 if (s->clienthello == NULL)
4868 *out = PACKET_data(&s->clienthello->ciphersuites);
4869 return PACKET_remaining(&s->clienthello->ciphersuites);
4872 size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out)
4874 if (s->clienthello == NULL)
4877 *out = s->clienthello->compressions;
4878 return s->clienthello->compressions_len;
4881 int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen)
4887 if (s->clienthello == NULL || out == NULL || outlen == NULL)
4889 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
4890 ext = s->clienthello->pre_proc_exts + i;
4894 present = OPENSSL_malloc(sizeof(*present) * num);
4895 if (present == NULL)
4897 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
4898 ext = s->clienthello->pre_proc_exts + i;
4900 if (ext->received_order >= num)
4902 present[ext->received_order] = ext->type;
4909 OPENSSL_free(present);
4913 int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
4919 if (s->clienthello == NULL)
4921 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) {
4922 r = s->clienthello->pre_proc_exts + i;
4923 if (r->present && r->type == type) {
4925 *out = PACKET_data(&r->data);
4927 *outlen = PACKET_remaining(&r->data);
4934 int SSL_free_buffers(SSL *ssl)
4936 RECORD_LAYER *rl = &ssl->rlayer;
4938 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl))
4941 RECORD_LAYER_release(rl);
4945 int SSL_alloc_buffers(SSL *ssl)
4947 return ssl3_setup_buffers(ssl);
4950 void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
4952 ctx->keylog_callback = cb;
4955 SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
4957 return ctx->keylog_callback;
4960 static int nss_keylog_int(const char *prefix,
4962 const uint8_t *parameter_1,
4963 size_t parameter_1_len,
4964 const uint8_t *parameter_2,
4965 size_t parameter_2_len)
4968 char *cursor = NULL;
4973 if (ssl->ctx->keylog_callback == NULL) return 1;
4976 * Our output buffer will contain the following strings, rendered with
4977 * space characters in between, terminated by a NULL character: first the
4978 * prefix, then the first parameter, then the second parameter. The
4979 * meaning of each parameter depends on the specific key material being
4980 * logged. Note that the first and second parameters are encoded in
4981 * hexadecimal, so we need a buffer that is twice their lengths.
4983 prefix_len = strlen(prefix);
4984 out_len = prefix_len + (2*parameter_1_len) + (2*parameter_2_len) + 3;
4985 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
4986 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, SSL_F_NSS_KEYLOG_INT,
4987 ERR_R_MALLOC_FAILURE);
4991 strcpy(cursor, prefix);
4992 cursor += prefix_len;
4995 for (i = 0; i < parameter_1_len; i++) {
4996 sprintf(cursor, "%02x", parameter_1[i]);
5001 for (i = 0; i < parameter_2_len; i++) {
5002 sprintf(cursor, "%02x", parameter_2[i]);
5007 ssl->ctx->keylog_callback(ssl, (const char *)out);
5013 int ssl_log_rsa_client_key_exchange(SSL *ssl,
5014 const uint8_t *encrypted_premaster,
5015 size_t encrypted_premaster_len,
5016 const uint8_t *premaster,
5017 size_t premaster_len)
5019 if (encrypted_premaster_len < 8) {
5020 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR,
5021 SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
5025 /* We only want the first 8 bytes of the encrypted premaster as a tag. */
5026 return nss_keylog_int("RSA",
5028 encrypted_premaster,
5034 int ssl_log_secret(SSL *ssl,
5036 const uint8_t *secret,
5039 return nss_keylog_int(label,
5041 ssl->s3->client_random,
5047 #define SSLV2_CIPHER_LEN 3
5049 int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format)
5053 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5055 if (PACKET_remaining(cipher_suites) == 0) {
5056 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_CACHE_CIPHERLIST,
5057 SSL_R_NO_CIPHERS_SPECIFIED);
5061 if (PACKET_remaining(cipher_suites) % n != 0) {
5062 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5063 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5067 OPENSSL_free(s->s3->tmp.ciphers_raw);
5068 s->s3->tmp.ciphers_raw = NULL;
5069 s->s3->tmp.ciphers_rawlen = 0;
5072 size_t numciphers = PACKET_remaining(cipher_suites) / n;
5073 PACKET sslv2ciphers = *cipher_suites;
5074 unsigned int leadbyte;
5078 * We store the raw ciphers list in SSLv3+ format so we need to do some
5079 * preprocessing to convert the list first. If there are any SSLv2 only
5080 * ciphersuites with a non-zero leading byte then we are going to
5081 * slightly over allocate because we won't store those. But that isn't a
5084 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
5085 s->s3->tmp.ciphers_raw = raw;
5087 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5088 ERR_R_MALLOC_FAILURE);
5091 for (s->s3->tmp.ciphers_rawlen = 0;
5092 PACKET_remaining(&sslv2ciphers) > 0;
5093 raw += TLS_CIPHER_LEN) {
5094 if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
5096 && !PACKET_copy_bytes(&sslv2ciphers, raw,
5099 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
5100 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5102 OPENSSL_free(s->s3->tmp.ciphers_raw);
5103 s->s3->tmp.ciphers_raw = NULL;
5104 s->s3->tmp.ciphers_rawlen = 0;
5108 s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN;
5110 } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
5111 &s->s3->tmp.ciphers_rawlen)) {
5112 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5113 ERR_R_INTERNAL_ERROR);
5119 int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
5120 int isv2format, STACK_OF(SSL_CIPHER) **sk,
5121 STACK_OF(SSL_CIPHER) **scsvs)
5125 if (!PACKET_buf_init(&pkt, bytes, len))
5127 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0);
5130 int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
5131 STACK_OF(SSL_CIPHER) **skp,
5132 STACK_OF(SSL_CIPHER) **scsvs_out,
5133 int sslv2format, int fatal)
5135 const SSL_CIPHER *c;
5136 STACK_OF(SSL_CIPHER) *sk = NULL;
5137 STACK_OF(SSL_CIPHER) *scsvs = NULL;
5139 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
5140 unsigned char cipher[SSLV2_CIPHER_LEN];
5142 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5144 if (PACKET_remaining(cipher_suites) == 0) {
5146 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_BYTES_TO_CIPHER_LIST,
5147 SSL_R_NO_CIPHERS_SPECIFIED);
5149 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
5153 if (PACKET_remaining(cipher_suites) % n != 0) {
5155 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5156 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5158 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST,
5159 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5163 sk = sk_SSL_CIPHER_new_null();
5164 scsvs = sk_SSL_CIPHER_new_null();
5165 if (sk == NULL || scsvs == NULL) {
5167 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5168 ERR_R_MALLOC_FAILURE);
5170 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5174 while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
5176 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
5177 * first byte set to zero, while true SSLv2 ciphers have a non-zero
5178 * first byte. We don't support any true SSLv2 ciphers, so skip them.
5180 if (sslv2format && cipher[0] != '\0')
5183 /* For SSLv2-compat, ignore leading 0-byte. */
5184 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
5186 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
5187 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
5189 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
5190 SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5192 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5197 if (PACKET_remaining(cipher_suites) > 0) {
5199 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5202 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH);
5209 sk_SSL_CIPHER_free(sk);
5210 if (scsvs_out != NULL)
5213 sk_SSL_CIPHER_free(scsvs);
5216 sk_SSL_CIPHER_free(sk);
5217 sk_SSL_CIPHER_free(scsvs);
5221 int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
5223 ctx->max_early_data = max_early_data;
5228 uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
5230 return ctx->max_early_data;
5233 int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
5235 s->max_early_data = max_early_data;
5240 uint32_t SSL_get_max_early_data(const SSL *s)
5242 return s->max_early_data;
5245 int ssl_randbytes(SSL *s, unsigned char *rnd, size_t size)
5247 if (s->drbg != NULL) {
5249 * Currently, it's the duty of the caller to serialize the generate
5250 * requests to the DRBG. So formally we have to check whether
5251 * s->drbg->lock != NULL and take the lock if this is the case.
5252 * However, this DRBG is unique to a given SSL object, and we already
5253 * require that SSL objects are only accessed by a single thread at
5254 * a given time. Also, SSL DRBGs have no child DRBG, so there is
5255 * no risk that this DRBG is accessed by a child DRBG in parallel
5256 * for reseeding. As such, we can rely on the application's
5257 * serialization of SSL accesses for the needed concurrency protection
5260 return RAND_DRBG_generate(s->drbg, rnd, size, 0, NULL, 0);
5262 return RAND_bytes(rnd, (int)size);
5265 __owur unsigned int ssl_get_max_send_fragment(const SSL *ssl)
5267 /* Return any active Max Fragment Len extension */
5268 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session))
5269 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5271 /* return current SSL connection setting */
5272 return ssl->max_send_fragment;
5275 __owur unsigned int ssl_get_split_send_fragment(const SSL *ssl)
5277 /* Return a value regarding an active Max Fragment Len extension */
5278 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)
5279 && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session))
5280 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5282 /* else limit |split_send_fragment| to current |max_send_fragment| */
5283 if (ssl->split_send_fragment > ssl->max_send_fragment)
5284 return ssl->max_send_fragment;
5286 /* return current SSL connection setting */
5287 return ssl->split_send_fragment;