2 * Copyright 1995-2018 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 const 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;
593 s->hello_retry_request = 0;
599 if (s->renegotiate) {
600 SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
604 ossl_statem_clear(s);
606 s->version = s->method->version;
607 s->client_version = s->version;
608 s->rwstate = SSL_NOTHING;
610 BUF_MEM_free(s->init_buf);
615 s->key_update = SSL_KEY_UPDATE_NONE;
617 EVP_MD_CTX_free(s->pha_dgst);
620 /* Reset DANE verification result state */
623 X509_free(s->dane.mcert);
624 s->dane.mcert = NULL;
625 s->dane.mtlsa = NULL;
627 /* Clear the verification result peername */
628 X509_VERIFY_PARAM_move_peername(s->param, NULL);
631 * Check to see if we were changed into a different method, if so, revert
634 if (s->method != s->ctx->method) {
635 s->method->ssl_free(s);
636 s->method = s->ctx->method;
637 if (!s->method->ssl_new(s))
640 if (!s->method->ssl_clear(s))
644 RECORD_LAYER_clear(&s->rlayer);
649 /** Used to change an SSL_CTXs default SSL method type */
650 int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
652 STACK_OF(SSL_CIPHER) *sk;
656 sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list),
657 &(ctx->cipher_list_by_id),
658 SSL_DEFAULT_CIPHER_LIST, ctx->cert);
659 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
660 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
666 SSL *SSL_new(SSL_CTX *ctx)
671 SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX);
674 if (ctx->method == NULL) {
675 SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
679 s = OPENSSL_zalloc(sizeof(*s));
684 s->lock = CRYPTO_THREAD_lock_new();
685 if (s->lock == NULL) {
692 * If not using the standard RAND (say for fuzzing), then don't use a
695 if (RAND_get_rand_method() == RAND_OpenSSL()) {
697 RAND_DRBG_new(RAND_DRBG_NID, 0, RAND_DRBG_get0_public());
699 || RAND_DRBG_instantiate(s->drbg,
700 (const unsigned char *) SSL_version_str,
701 sizeof(SSL_version_str) - 1) == 0)
705 RECORD_LAYER_init(&s->rlayer, s);
707 s->options = ctx->options;
708 s->dane.flags = ctx->dane.flags;
709 s->min_proto_version = ctx->min_proto_version;
710 s->max_proto_version = ctx->max_proto_version;
712 s->max_cert_list = ctx->max_cert_list;
713 s->max_early_data = ctx->max_early_data;
716 * Earlier library versions used to copy the pointer to the CERT, not
717 * its contents; only when setting new parameters for the per-SSL
718 * copy, ssl_cert_new would be called (and the direct reference to
719 * the per-SSL_CTX settings would be lost, but those still were
720 * indirectly accessed for various purposes, and for that reason they
721 * used to be known as s->ctx->default_cert). Now we don't look at the
722 * SSL_CTX's CERT after having duplicated it once.
724 s->cert = ssl_cert_dup(ctx->cert);
728 RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
729 s->msg_callback = ctx->msg_callback;
730 s->msg_callback_arg = ctx->msg_callback_arg;
731 s->verify_mode = ctx->verify_mode;
732 s->not_resumable_session_cb = ctx->not_resumable_session_cb;
733 s->record_padding_cb = ctx->record_padding_cb;
734 s->record_padding_arg = ctx->record_padding_arg;
735 s->block_padding = ctx->block_padding;
736 s->sid_ctx_length = ctx->sid_ctx_length;
737 if (!ossl_assert(s->sid_ctx_length <= sizeof(s->sid_ctx)))
739 memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
740 s->verify_callback = ctx->default_verify_callback;
741 s->generate_session_id = ctx->generate_session_id;
743 s->param = X509_VERIFY_PARAM_new();
744 if (s->param == NULL)
746 X509_VERIFY_PARAM_inherit(s->param, ctx->param);
747 s->quiet_shutdown = ctx->quiet_shutdown;
749 s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode;
750 s->max_send_fragment = ctx->max_send_fragment;
751 s->split_send_fragment = ctx->split_send_fragment;
752 s->max_pipelines = ctx->max_pipelines;
753 if (s->max_pipelines > 1)
754 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
755 if (ctx->default_read_buf_len > 0)
756 SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len);
761 s->ext.debug_arg = NULL;
762 s->ext.ticket_expected = 0;
763 s->ext.status_type = ctx->ext.status_type;
764 s->ext.status_expected = 0;
765 s->ext.ocsp.ids = NULL;
766 s->ext.ocsp.exts = NULL;
767 s->ext.ocsp.resp = NULL;
768 s->ext.ocsp.resp_len = 0;
770 s->session_ctx = ctx;
771 #ifndef OPENSSL_NO_EC
772 if (ctx->ext.ecpointformats) {
773 s->ext.ecpointformats =
774 OPENSSL_memdup(ctx->ext.ecpointformats,
775 ctx->ext.ecpointformats_len);
776 if (!s->ext.ecpointformats)
778 s->ext.ecpointformats_len =
779 ctx->ext.ecpointformats_len;
781 if (ctx->ext.supportedgroups) {
782 s->ext.supportedgroups =
783 OPENSSL_memdup(ctx->ext.supportedgroups,
784 ctx->ext.supportedgroups_len
785 * sizeof(*ctx->ext.supportedgroups));
786 if (!s->ext.supportedgroups)
788 s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
791 #ifndef OPENSSL_NO_NEXTPROTONEG
795 if (s->ctx->ext.alpn) {
796 s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
797 if (s->ext.alpn == NULL)
799 memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
800 s->ext.alpn_len = s->ctx->ext.alpn_len;
803 s->verified_chain = NULL;
804 s->verify_result = X509_V_OK;
806 s->default_passwd_callback = ctx->default_passwd_callback;
807 s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
809 s->method = ctx->method;
811 s->key_update = SSL_KEY_UPDATE_NONE;
813 if (!s->method->ssl_new(s))
816 s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
821 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
824 #ifndef OPENSSL_NO_PSK
825 s->psk_client_callback = ctx->psk_client_callback;
826 s->psk_server_callback = ctx->psk_server_callback;
828 s->psk_find_session_cb = ctx->psk_find_session_cb;
829 s->psk_use_session_cb = ctx->psk_use_session_cb;
833 #ifndef OPENSSL_NO_CT
834 if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
835 ctx->ct_validation_callback_arg))
842 SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
846 int SSL_is_dtls(const SSL *s)
848 return SSL_IS_DTLS(s) ? 1 : 0;
851 int SSL_up_ref(SSL *s)
855 if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
858 REF_PRINT_COUNT("SSL", s);
859 REF_ASSERT_ISNT(i < 2);
860 return ((i > 1) ? 1 : 0);
863 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
864 unsigned int sid_ctx_len)
866 if (sid_ctx_len > sizeof(ctx->sid_ctx)) {
867 SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,
868 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
871 ctx->sid_ctx_length = sid_ctx_len;
872 memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len);
877 int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
878 unsigned int sid_ctx_len)
880 if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
881 SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,
882 SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
885 ssl->sid_ctx_length = sid_ctx_len;
886 memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len);
891 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
893 CRYPTO_THREAD_write_lock(ctx->lock);
894 ctx->generate_session_id = cb;
895 CRYPTO_THREAD_unlock(ctx->lock);
899 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
901 CRYPTO_THREAD_write_lock(ssl->lock);
902 ssl->generate_session_id = cb;
903 CRYPTO_THREAD_unlock(ssl->lock);
907 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
911 * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
912 * we can "construct" a session to give us the desired check - i.e. to
913 * find if there's a session in the hash table that would conflict with
914 * any new session built out of this id/id_len and the ssl_version in use
919 if (id_len > sizeof(r.session_id))
922 r.ssl_version = ssl->version;
923 r.session_id_length = id_len;
924 memcpy(r.session_id, id, id_len);
926 CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
927 p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
928 CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
932 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
934 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
937 int SSL_set_purpose(SSL *s, int purpose)
939 return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
942 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
944 return X509_VERIFY_PARAM_set_trust(s->param, trust);
947 int SSL_set_trust(SSL *s, int trust)
949 return X509_VERIFY_PARAM_set_trust(s->param, trust);
952 int SSL_set1_host(SSL *s, const char *hostname)
954 return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
957 int SSL_add1_host(SSL *s, const char *hostname)
959 return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
962 void SSL_set_hostflags(SSL *s, unsigned int flags)
964 X509_VERIFY_PARAM_set_hostflags(s->param, flags);
967 const char *SSL_get0_peername(SSL *s)
969 return X509_VERIFY_PARAM_get0_peername(s->param);
972 int SSL_CTX_dane_enable(SSL_CTX *ctx)
974 return dane_ctx_enable(&ctx->dane);
977 unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
979 unsigned long orig = ctx->dane.flags;
981 ctx->dane.flags |= flags;
985 unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
987 unsigned long orig = ctx->dane.flags;
989 ctx->dane.flags &= ~flags;
993 int SSL_dane_enable(SSL *s, const char *basedomain)
995 SSL_DANE *dane = &s->dane;
997 if (s->ctx->dane.mdmax == 0) {
998 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED);
1001 if (dane->trecs != NULL) {
1002 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED);
1007 * Default SNI name. This rejects empty names, while set1_host below
1008 * accepts them and disables host name checks. To avoid side-effects with
1009 * invalid input, set the SNI name first.
1011 if (s->ext.hostname == NULL) {
1012 if (!SSL_set_tlsext_host_name(s, basedomain)) {
1013 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1018 /* Primary RFC6125 reference identifier */
1019 if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
1020 SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
1026 dane->dctx = &s->ctx->dane;
1027 dane->trecs = sk_danetls_record_new_null();
1029 if (dane->trecs == NULL) {
1030 SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE);
1036 unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
1038 unsigned long orig = ssl->dane.flags;
1040 ssl->dane.flags |= flags;
1044 unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
1046 unsigned long orig = ssl->dane.flags;
1048 ssl->dane.flags &= ~flags;
1052 int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
1054 SSL_DANE *dane = &s->dane;
1056 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1060 *mcert = dane->mcert;
1062 *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
1067 int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
1068 uint8_t *mtype, unsigned const char **data, size_t *dlen)
1070 SSL_DANE *dane = &s->dane;
1072 if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
1076 *usage = dane->mtlsa->usage;
1078 *selector = dane->mtlsa->selector;
1080 *mtype = dane->mtlsa->mtype;
1082 *data = dane->mtlsa->data;
1084 *dlen = dane->mtlsa->dlen;
1089 SSL_DANE *SSL_get0_dane(SSL *s)
1094 int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
1095 uint8_t mtype, unsigned const char *data, size_t dlen)
1097 return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen);
1100 int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
1103 return dane_mtype_set(&ctx->dane, md, mtype, ord);
1106 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
1108 return X509_VERIFY_PARAM_set1(ctx->param, vpm);
1111 int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
1113 return X509_VERIFY_PARAM_set1(ssl->param, vpm);
1116 X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx)
1121 X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl)
1126 void SSL_certs_clear(SSL *s)
1128 ssl_cert_clear_certs(s->cert);
1131 void SSL_free(SSL *s)
1138 CRYPTO_DOWN_REF(&s->references, &i, s->lock);
1139 REF_PRINT_COUNT("SSL", s);
1142 REF_ASSERT_ISNT(i < 0);
1144 X509_VERIFY_PARAM_free(s->param);
1145 dane_final(&s->dane);
1146 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
1148 /* Ignore return value */
1149 ssl_free_wbio_buffer(s);
1151 BIO_free_all(s->wbio);
1152 BIO_free_all(s->rbio);
1154 BUF_MEM_free(s->init_buf);
1156 /* add extra stuff */
1157 sk_SSL_CIPHER_free(s->cipher_list);
1158 sk_SSL_CIPHER_free(s->cipher_list_by_id);
1160 /* Make the next call work :-) */
1161 if (s->session != NULL) {
1162 ssl_clear_bad_session(s);
1163 SSL_SESSION_free(s->session);
1165 SSL_SESSION_free(s->psksession);
1166 OPENSSL_free(s->psksession_id);
1170 ssl_cert_free(s->cert);
1171 /* Free up if allocated */
1173 OPENSSL_free(s->ext.hostname);
1174 SSL_CTX_free(s->session_ctx);
1175 #ifndef OPENSSL_NO_EC
1176 OPENSSL_free(s->ext.ecpointformats);
1177 OPENSSL_free(s->ext.supportedgroups);
1178 #endif /* OPENSSL_NO_EC */
1179 sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
1180 #ifndef OPENSSL_NO_OCSP
1181 sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
1183 #ifndef OPENSSL_NO_CT
1184 SCT_LIST_free(s->scts);
1185 OPENSSL_free(s->ext.scts);
1187 OPENSSL_free(s->ext.ocsp.resp);
1188 OPENSSL_free(s->ext.alpn);
1189 OPENSSL_free(s->ext.tls13_cookie);
1190 OPENSSL_free(s->clienthello);
1191 OPENSSL_free(s->pha_context);
1192 EVP_MD_CTX_free(s->pha_dgst);
1194 sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free);
1196 sk_X509_pop_free(s->verified_chain, X509_free);
1198 if (s->method != NULL)
1199 s->method->ssl_free(s);
1201 RECORD_LAYER_release(&s->rlayer);
1203 SSL_CTX_free(s->ctx);
1205 ASYNC_WAIT_CTX_free(s->waitctx);
1207 #if !defined(OPENSSL_NO_NEXTPROTONEG)
1208 OPENSSL_free(s->ext.npn);
1211 #ifndef OPENSSL_NO_SRTP
1212 sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
1215 RAND_DRBG_free(s->drbg);
1216 CRYPTO_THREAD_lock_free(s->lock);
1221 void SSL_set0_rbio(SSL *s, BIO *rbio)
1223 BIO_free_all(s->rbio);
1227 void SSL_set0_wbio(SSL *s, BIO *wbio)
1230 * If the output buffering BIO is still in place, remove it
1232 if (s->bbio != NULL)
1233 s->wbio = BIO_pop(s->wbio);
1235 BIO_free_all(s->wbio);
1238 /* Re-attach |bbio| to the new |wbio|. */
1239 if (s->bbio != NULL)
1240 s->wbio = BIO_push(s->bbio, s->wbio);
1243 void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
1246 * For historical reasons, this function has many different cases in
1247 * ownership handling.
1250 /* If nothing has changed, do nothing */
1251 if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
1255 * If the two arguments are equal then one fewer reference is granted by the
1256 * caller than we want to take
1258 if (rbio != NULL && rbio == wbio)
1262 * If only the wbio is changed only adopt one reference.
1264 if (rbio == SSL_get_rbio(s)) {
1265 SSL_set0_wbio(s, wbio);
1269 * There is an asymmetry here for historical reasons. If only the rbio is
1270 * changed AND the rbio and wbio were originally different, then we only
1271 * adopt one reference.
1273 if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
1274 SSL_set0_rbio(s, rbio);
1278 /* Otherwise, adopt both references. */
1279 SSL_set0_rbio(s, rbio);
1280 SSL_set0_wbio(s, wbio);
1283 BIO *SSL_get_rbio(const SSL *s)
1288 BIO *SSL_get_wbio(const SSL *s)
1290 if (s->bbio != NULL) {
1292 * If |bbio| is active, the true caller-configured BIO is its
1295 return BIO_next(s->bbio);
1300 int SSL_get_fd(const SSL *s)
1302 return SSL_get_rfd(s);
1305 int SSL_get_rfd(const SSL *s)
1310 b = SSL_get_rbio(s);
1311 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1313 BIO_get_fd(r, &ret);
1317 int SSL_get_wfd(const SSL *s)
1322 b = SSL_get_wbio(s);
1323 r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
1325 BIO_get_fd(r, &ret);
1329 #ifndef OPENSSL_NO_SOCK
1330 int SSL_set_fd(SSL *s, int fd)
1335 bio = BIO_new(BIO_s_socket());
1338 SSLerr(SSL_F_SSL_SET_FD, ERR_R_BUF_LIB);
1341 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1342 SSL_set_bio(s, bio, bio);
1348 int SSL_set_wfd(SSL *s, int fd)
1350 BIO *rbio = SSL_get_rbio(s);
1352 if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
1353 || (int)BIO_get_fd(rbio, NULL) != fd) {
1354 BIO *bio = BIO_new(BIO_s_socket());
1357 SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB);
1360 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1361 SSL_set0_wbio(s, bio);
1364 SSL_set0_wbio(s, rbio);
1369 int SSL_set_rfd(SSL *s, int fd)
1371 BIO *wbio = SSL_get_wbio(s);
1373 if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
1374 || ((int)BIO_get_fd(wbio, NULL) != fd)) {
1375 BIO *bio = BIO_new(BIO_s_socket());
1378 SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB);
1381 BIO_set_fd(bio, fd, BIO_NOCLOSE);
1382 SSL_set0_rbio(s, bio);
1385 SSL_set0_rbio(s, wbio);
1392 /* return length of latest Finished message we sent, copy to 'buf' */
1393 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
1397 if (s->s3 != NULL) {
1398 ret = s->s3->tmp.finish_md_len;
1401 memcpy(buf, s->s3->tmp.finish_md, count);
1406 /* return length of latest Finished message we expected, copy to 'buf' */
1407 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
1411 if (s->s3 != NULL) {
1412 ret = s->s3->tmp.peer_finish_md_len;
1415 memcpy(buf, s->s3->tmp.peer_finish_md, count);
1420 int SSL_get_verify_mode(const SSL *s)
1422 return s->verify_mode;
1425 int SSL_get_verify_depth(const SSL *s)
1427 return X509_VERIFY_PARAM_get_depth(s->param);
1430 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
1431 return s->verify_callback;
1434 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
1436 return ctx->verify_mode;
1439 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
1441 return X509_VERIFY_PARAM_get_depth(ctx->param);
1444 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
1445 return ctx->default_verify_callback;
1448 void SSL_set_verify(SSL *s, int mode,
1449 int (*callback) (int ok, X509_STORE_CTX *ctx))
1451 s->verify_mode = mode;
1452 if (callback != NULL)
1453 s->verify_callback = callback;
1456 void SSL_set_verify_depth(SSL *s, int depth)
1458 X509_VERIFY_PARAM_set_depth(s->param, depth);
1461 void SSL_set_read_ahead(SSL *s, int yes)
1463 RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
1466 int SSL_get_read_ahead(const SSL *s)
1468 return RECORD_LAYER_get_read_ahead(&s->rlayer);
1471 int SSL_pending(const SSL *s)
1473 size_t pending = s->method->ssl_pending(s);
1476 * SSL_pending cannot work properly if read-ahead is enabled
1477 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
1478 * impossible to fix since SSL_pending cannot report errors that may be
1479 * observed while scanning the new data. (Note that SSL_pending() is
1480 * often used as a boolean value, so we'd better not return -1.)
1482 * SSL_pending also cannot work properly if the value >INT_MAX. In that case
1483 * we just return INT_MAX.
1485 return pending < INT_MAX ? (int)pending : INT_MAX;
1488 int SSL_has_pending(const SSL *s)
1491 * Similar to SSL_pending() but returns a 1 to indicate that we have
1492 * unprocessed data available or 0 otherwise (as opposed to the number of
1493 * bytes available). Unlike SSL_pending() this will take into account
1494 * read_ahead data. A 1 return simply indicates that we have unprocessed
1495 * data. That data may not result in any application data, or we may fail
1496 * to parse the records for some reason.
1498 if (RECORD_LAYER_processed_read_pending(&s->rlayer))
1501 return RECORD_LAYER_read_pending(&s->rlayer);
1504 X509 *SSL_get_peer_certificate(const SSL *s)
1508 if ((s == NULL) || (s->session == NULL))
1511 r = s->session->peer;
1521 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
1525 if ((s == NULL) || (s->session == NULL))
1528 r = s->session->peer_chain;
1531 * If we are a client, cert_chain includes the peer's own certificate; if
1532 * we are a server, it does not.
1539 * Now in theory, since the calling process own 't' it should be safe to
1540 * modify. We need to be able to read f without being hassled
1542 int SSL_copy_session_id(SSL *t, const SSL *f)
1545 /* Do we need to to SSL locking? */
1546 if (!SSL_set_session(t, SSL_get_session(f))) {
1551 * what if we are setup for one protocol version but want to talk another
1553 if (t->method != f->method) {
1554 t->method->ssl_free(t);
1555 t->method = f->method;
1556 if (t->method->ssl_new(t) == 0)
1560 CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock);
1561 ssl_cert_free(t->cert);
1563 if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
1570 /* Fix this so it checks all the valid key/cert options */
1571 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
1573 if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
1574 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1577 if (ctx->cert->key->privatekey == NULL) {
1578 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1581 return X509_check_private_key
1582 (ctx->cert->key->x509, ctx->cert->key->privatekey);
1585 /* Fix this function so that it takes an optional type parameter */
1586 int SSL_check_private_key(const SSL *ssl)
1589 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
1592 if (ssl->cert->key->x509 == NULL) {
1593 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
1596 if (ssl->cert->key->privatekey == NULL) {
1597 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
1600 return X509_check_private_key(ssl->cert->key->x509,
1601 ssl->cert->key->privatekey);
1604 int SSL_waiting_for_async(SSL *s)
1612 int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
1614 ASYNC_WAIT_CTX *ctx = s->waitctx;
1618 return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
1621 int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
1622 OSSL_ASYNC_FD *delfd, size_t *numdelfds)
1624 ASYNC_WAIT_CTX *ctx = s->waitctx;
1628 return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
1632 int SSL_accept(SSL *s)
1634 if (s->handshake_func == NULL) {
1635 /* Not properly initialized yet */
1636 SSL_set_accept_state(s);
1639 return SSL_do_handshake(s);
1642 int SSL_connect(SSL *s)
1644 if (s->handshake_func == NULL) {
1645 /* Not properly initialized yet */
1646 SSL_set_connect_state(s);
1649 return SSL_do_handshake(s);
1652 long SSL_get_default_timeout(const SSL *s)
1654 return s->method->get_timeout();
1657 static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
1658 int (*func) (void *))
1661 if (s->waitctx == NULL) {
1662 s->waitctx = ASYNC_WAIT_CTX_new();
1663 if (s->waitctx == NULL)
1666 switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args,
1667 sizeof(struct ssl_async_args))) {
1669 s->rwstate = SSL_NOTHING;
1670 SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC);
1673 s->rwstate = SSL_ASYNC_PAUSED;
1676 s->rwstate = SSL_ASYNC_NO_JOBS;
1682 s->rwstate = SSL_NOTHING;
1683 SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR);
1684 /* Shouldn't happen */
1689 static int ssl_io_intern(void *vargs)
1691 struct ssl_async_args *args;
1696 args = (struct ssl_async_args *)vargs;
1700 switch (args->type) {
1702 return args->f.func_read(s, buf, num, &s->asyncrw);
1704 return args->f.func_write(s, buf, num, &s->asyncrw);
1706 return args->f.func_other(s);
1711 int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1713 if (s->handshake_func == NULL) {
1714 SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED);
1718 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1719 s->rwstate = SSL_NOTHING;
1723 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1724 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
1725 SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1729 * If we are a client and haven't received the ServerHello etc then we
1732 ossl_statem_check_finish_init(s, 0);
1734 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1735 struct ssl_async_args args;
1741 args.type = READFUNC;
1742 args.f.func_read = s->method->ssl_read;
1744 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1745 *readbytes = s->asyncrw;
1748 return s->method->ssl_read(s, buf, num, readbytes);
1752 int SSL_read(SSL *s, void *buf, int num)
1758 SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH);
1762 ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
1765 * The cast is safe here because ret should be <= INT_MAX because num is
1769 ret = (int)readbytes;
1774 int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1776 int ret = ssl_read_internal(s, buf, num, readbytes);
1783 int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
1788 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1789 return SSL_READ_EARLY_DATA_ERROR;
1792 switch (s->early_data_state) {
1793 case SSL_EARLY_DATA_NONE:
1794 if (!SSL_in_before(s)) {
1795 SSLerr(SSL_F_SSL_READ_EARLY_DATA,
1796 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1797 return SSL_READ_EARLY_DATA_ERROR;
1801 case SSL_EARLY_DATA_ACCEPT_RETRY:
1802 s->early_data_state = SSL_EARLY_DATA_ACCEPTING;
1803 ret = SSL_accept(s);
1806 s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
1807 return SSL_READ_EARLY_DATA_ERROR;
1811 case SSL_EARLY_DATA_READ_RETRY:
1812 if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
1813 s->early_data_state = SSL_EARLY_DATA_READING;
1814 ret = SSL_read_ex(s, buf, num, readbytes);
1816 * State machine will update early_data_state to
1817 * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData
1820 if (ret > 0 || (ret <= 0 && s->early_data_state
1821 != SSL_EARLY_DATA_FINISHED_READING)) {
1822 s->early_data_state = SSL_EARLY_DATA_READ_RETRY;
1823 return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
1824 : SSL_READ_EARLY_DATA_ERROR;
1827 s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
1830 return SSL_READ_EARLY_DATA_FINISH;
1833 SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1834 return SSL_READ_EARLY_DATA_ERROR;
1838 int SSL_get_early_data_status(const SSL *s)
1840 return s->ext.early_data;
1843 static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
1845 if (s->handshake_func == NULL) {
1846 SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED);
1850 if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
1853 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1854 struct ssl_async_args args;
1860 args.type = READFUNC;
1861 args.f.func_read = s->method->ssl_peek;
1863 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1864 *readbytes = s->asyncrw;
1867 return s->method->ssl_peek(s, buf, num, readbytes);
1871 int SSL_peek(SSL *s, void *buf, int num)
1877 SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH);
1881 ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
1884 * The cast is safe here because ret should be <= INT_MAX because num is
1888 ret = (int)readbytes;
1894 int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
1896 int ret = ssl_peek_internal(s, buf, num, readbytes);
1903 int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
1905 if (s->handshake_func == NULL) {
1906 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED);
1910 if (s->shutdown & SSL_SENT_SHUTDOWN) {
1911 s->rwstate = SSL_NOTHING;
1912 SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN);
1916 if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
1917 || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY
1918 || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
1919 SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1922 /* If we are a client and haven't sent the Finished we better do that */
1923 ossl_statem_check_finish_init(s, 1);
1925 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
1927 struct ssl_async_args args;
1930 args.buf = (void *)buf;
1932 args.type = WRITEFUNC;
1933 args.f.func_write = s->method->ssl_write;
1935 ret = ssl_start_async_job(s, &args, ssl_io_intern);
1936 *written = s->asyncrw;
1939 return s->method->ssl_write(s, buf, num, written);
1943 int SSL_write(SSL *s, const void *buf, int num)
1949 SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH);
1953 ret = ssl_write_internal(s, buf, (size_t)num, &written);
1956 * The cast is safe here because ret should be <= INT_MAX because num is
1965 int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
1967 int ret = ssl_write_internal(s, buf, num, written);
1974 int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
1976 int ret, early_data_state;
1978 uint32_t partialwrite;
1980 switch (s->early_data_state) {
1981 case SSL_EARLY_DATA_NONE:
1983 || !SSL_in_before(s)
1984 || ((s->session == NULL || s->session->ext.max_early_data == 0)
1985 && (s->psk_use_session_cb == NULL))) {
1986 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA,
1987 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1992 case SSL_EARLY_DATA_CONNECT_RETRY:
1993 s->early_data_state = SSL_EARLY_DATA_CONNECTING;
1994 ret = SSL_connect(s);
1997 s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
2002 case SSL_EARLY_DATA_WRITE_RETRY:
2003 s->early_data_state = SSL_EARLY_DATA_WRITING;
2005 * We disable partial write for early data because we don't keep track
2006 * of how many bytes we've written between the SSL_write_ex() call and
2007 * the flush if the flush needs to be retried)
2009 partialwrite = s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE;
2010 s->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE;
2011 ret = SSL_write_ex(s, buf, num, &writtmp);
2012 s->mode |= partialwrite;
2014 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2017 s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH;
2020 case SSL_EARLY_DATA_WRITE_FLUSH:
2021 /* The buffering BIO is still in place so we need to flush it */
2022 if (statem_flush(s) != 1)
2025 s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
2028 case SSL_EARLY_DATA_FINISHED_READING:
2029 case SSL_EARLY_DATA_READ_RETRY:
2030 early_data_state = s->early_data_state;
2031 /* We are a server writing to an unauthenticated client */
2032 s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING;
2033 ret = SSL_write_ex(s, buf, num, written);
2034 s->early_data_state = early_data_state;
2038 SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
2043 int SSL_shutdown(SSL *s)
2046 * Note that this function behaves differently from what one might
2047 * expect. Return values are 0 for no success (yet), 1 for success; but
2048 * calling it once is usually not enough, even if blocking I/O is used
2049 * (see ssl3_shutdown).
2052 if (s->handshake_func == NULL) {
2053 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
2057 if (!SSL_in_init(s)) {
2058 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
2059 struct ssl_async_args args;
2062 args.type = OTHERFUNC;
2063 args.f.func_other = s->method->ssl_shutdown;
2065 return ssl_start_async_job(s, &args, ssl_io_intern);
2067 return s->method->ssl_shutdown(s);
2070 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT);
2075 int SSL_key_update(SSL *s, int updatetype)
2078 * TODO(TLS1.3): How will applications know whether TLSv1.3 has been
2079 * negotiated, and that it is appropriate to call SSL_key_update() instead
2080 * of SSL_renegotiate().
2082 if (!SSL_IS_TLS13(s)) {
2083 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION);
2087 if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
2088 && updatetype != SSL_KEY_UPDATE_REQUESTED) {
2089 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE);
2093 if (!SSL_is_init_finished(s)) {
2094 SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT);
2098 ossl_statem_set_in_init(s, 1);
2099 s->key_update = updatetype;
2103 int SSL_get_key_update_type(SSL *s)
2105 return s->key_update;
2108 int SSL_renegotiate(SSL *s)
2110 if (SSL_IS_TLS13(s)) {
2111 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION);
2115 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2116 SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION);
2123 return s->method->ssl_renegotiate(s);
2126 int SSL_renegotiate_abbreviated(SSL *s)
2128 if (SSL_IS_TLS13(s)) {
2129 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION);
2133 if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
2134 SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION);
2141 return s->method->ssl_renegotiate(s);
2144 int SSL_renegotiate_pending(SSL *s)
2147 * becomes true when negotiation is requested; false again once a
2148 * handshake has finished
2150 return (s->renegotiate != 0);
2153 long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
2158 case SSL_CTRL_GET_READ_AHEAD:
2159 return RECORD_LAYER_get_read_ahead(&s->rlayer);
2160 case SSL_CTRL_SET_READ_AHEAD:
2161 l = RECORD_LAYER_get_read_ahead(&s->rlayer);
2162 RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
2165 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2166 s->msg_callback_arg = parg;
2170 return (s->mode |= larg);
2171 case SSL_CTRL_CLEAR_MODE:
2172 return (s->mode &= ~larg);
2173 case SSL_CTRL_GET_MAX_CERT_LIST:
2174 return (long)s->max_cert_list;
2175 case SSL_CTRL_SET_MAX_CERT_LIST:
2178 l = (long)s->max_cert_list;
2179 s->max_cert_list = (size_t)larg;
2181 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2182 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2184 s->max_send_fragment = larg;
2185 if (s->max_send_fragment < s->split_send_fragment)
2186 s->split_send_fragment = s->max_send_fragment;
2188 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2189 if ((size_t)larg > s->max_send_fragment || larg == 0)
2191 s->split_send_fragment = larg;
2193 case SSL_CTRL_SET_MAX_PIPELINES:
2194 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2196 s->max_pipelines = larg;
2198 RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
2200 case SSL_CTRL_GET_RI_SUPPORT:
2202 return s->s3->send_connection_binding;
2205 case SSL_CTRL_CERT_FLAGS:
2206 return (s->cert->cert_flags |= larg);
2207 case SSL_CTRL_CLEAR_CERT_FLAGS:
2208 return (s->cert->cert_flags &= ~larg);
2210 case SSL_CTRL_GET_RAW_CIPHERLIST:
2212 if (s->s3->tmp.ciphers_raw == NULL)
2214 *(unsigned char **)parg = s->s3->tmp.ciphers_raw;
2215 return (int)s->s3->tmp.ciphers_rawlen;
2217 return TLS_CIPHER_LEN;
2219 case SSL_CTRL_GET_EXTMS_SUPPORT:
2220 if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
2222 if (s->session->flags & SSL_SESS_FLAG_EXTMS)
2226 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2227 return ssl_check_allowed_versions(larg, s->max_proto_version)
2228 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2229 &s->min_proto_version);
2230 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2231 return s->min_proto_version;
2232 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2233 return ssl_check_allowed_versions(s->min_proto_version, larg)
2234 && ssl_set_version_bound(s->ctx->method->version, (int)larg,
2235 &s->max_proto_version);
2236 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2237 return s->max_proto_version;
2239 return s->method->ssl_ctrl(s, cmd, larg, parg);
2243 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
2246 case SSL_CTRL_SET_MSG_CALLBACK:
2247 s->msg_callback = (void (*)
2248 (int write_p, int version, int content_type,
2249 const void *buf, size_t len, SSL *ssl,
2254 return s->method->ssl_callback_ctrl(s, cmd, fp);
2258 LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
2260 return ctx->sessions;
2263 long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
2267 /* For some cases with ctx == NULL perform syntax checks */
2270 #ifndef OPENSSL_NO_EC
2271 case SSL_CTRL_SET_GROUPS_LIST:
2272 return tls1_set_groups_list(NULL, NULL, parg);
2274 case SSL_CTRL_SET_SIGALGS_LIST:
2275 case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
2276 return tls1_set_sigalgs_list(NULL, parg, 0);
2283 case SSL_CTRL_GET_READ_AHEAD:
2284 return ctx->read_ahead;
2285 case SSL_CTRL_SET_READ_AHEAD:
2286 l = ctx->read_ahead;
2287 ctx->read_ahead = larg;
2290 case SSL_CTRL_SET_MSG_CALLBACK_ARG:
2291 ctx->msg_callback_arg = parg;
2294 case SSL_CTRL_GET_MAX_CERT_LIST:
2295 return (long)ctx->max_cert_list;
2296 case SSL_CTRL_SET_MAX_CERT_LIST:
2299 l = (long)ctx->max_cert_list;
2300 ctx->max_cert_list = (size_t)larg;
2303 case SSL_CTRL_SET_SESS_CACHE_SIZE:
2306 l = (long)ctx->session_cache_size;
2307 ctx->session_cache_size = (size_t)larg;
2309 case SSL_CTRL_GET_SESS_CACHE_SIZE:
2310 return (long)ctx->session_cache_size;
2311 case SSL_CTRL_SET_SESS_CACHE_MODE:
2312 l = ctx->session_cache_mode;
2313 ctx->session_cache_mode = larg;
2315 case SSL_CTRL_GET_SESS_CACHE_MODE:
2316 return ctx->session_cache_mode;
2318 case SSL_CTRL_SESS_NUMBER:
2319 return lh_SSL_SESSION_num_items(ctx->sessions);
2320 case SSL_CTRL_SESS_CONNECT:
2321 return CRYPTO_atomic_read(&ctx->stats.sess_connect, &i, ctx->lock)
2323 case SSL_CTRL_SESS_CONNECT_GOOD:
2324 return CRYPTO_atomic_read(&ctx->stats.sess_connect_good, &i, ctx->lock)
2326 case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
2327 return CRYPTO_atomic_read(&ctx->stats.sess_connect_renegotiate, &i,
2330 case SSL_CTRL_SESS_ACCEPT:
2331 return CRYPTO_atomic_read(&ctx->stats.sess_accept, &i, ctx->lock)
2333 case SSL_CTRL_SESS_ACCEPT_GOOD:
2334 return CRYPTO_atomic_read(&ctx->stats.sess_accept_good, &i, ctx->lock)
2336 case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
2337 return CRYPTO_atomic_read(&ctx->stats.sess_accept_renegotiate, &i,
2340 case SSL_CTRL_SESS_HIT:
2341 return CRYPTO_atomic_read(&ctx->stats.sess_hit, &i, ctx->lock)
2343 case SSL_CTRL_SESS_CB_HIT:
2344 return CRYPTO_atomic_read(&ctx->stats.sess_cb_hit, &i, ctx->lock)
2346 case SSL_CTRL_SESS_MISSES:
2347 return CRYPTO_atomic_read(&ctx->stats.sess_miss, &i, ctx->lock)
2349 case SSL_CTRL_SESS_TIMEOUTS:
2350 return CRYPTO_atomic_read(&ctx->stats.sess_timeout, &i, ctx->lock)
2352 case SSL_CTRL_SESS_CACHE_FULL:
2353 return CRYPTO_atomic_read(&ctx->stats.sess_cache_full, &i, ctx->lock)
2356 return (ctx->mode |= larg);
2357 case SSL_CTRL_CLEAR_MODE:
2358 return (ctx->mode &= ~larg);
2359 case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
2360 if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
2362 ctx->max_send_fragment = larg;
2363 if (ctx->max_send_fragment < ctx->split_send_fragment)
2364 ctx->split_send_fragment = ctx->max_send_fragment;
2366 case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
2367 if ((size_t)larg > ctx->max_send_fragment || larg == 0)
2369 ctx->split_send_fragment = larg;
2371 case SSL_CTRL_SET_MAX_PIPELINES:
2372 if (larg < 1 || larg > SSL_MAX_PIPELINES)
2374 ctx->max_pipelines = larg;
2376 case SSL_CTRL_CERT_FLAGS:
2377 return (ctx->cert->cert_flags |= larg);
2378 case SSL_CTRL_CLEAR_CERT_FLAGS:
2379 return (ctx->cert->cert_flags &= ~larg);
2380 case SSL_CTRL_SET_MIN_PROTO_VERSION:
2381 return ssl_check_allowed_versions(larg, ctx->max_proto_version)
2382 && ssl_set_version_bound(ctx->method->version, (int)larg,
2383 &ctx->min_proto_version);
2384 case SSL_CTRL_GET_MIN_PROTO_VERSION:
2385 return ctx->min_proto_version;
2386 case SSL_CTRL_SET_MAX_PROTO_VERSION:
2387 return ssl_check_allowed_versions(ctx->min_proto_version, larg)
2388 && ssl_set_version_bound(ctx->method->version, (int)larg,
2389 &ctx->max_proto_version);
2390 case SSL_CTRL_GET_MAX_PROTO_VERSION:
2391 return ctx->max_proto_version;
2393 return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg);
2397 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
2400 case SSL_CTRL_SET_MSG_CALLBACK:
2401 ctx->msg_callback = (void (*)
2402 (int write_p, int version, int content_type,
2403 const void *buf, size_t len, SSL *ssl,
2408 return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp);
2412 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
2421 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
2422 const SSL_CIPHER *const *bp)
2424 if ((*ap)->id > (*bp)->id)
2426 if ((*ap)->id < (*bp)->id)
2431 /** return a STACK of the ciphers available for the SSL and in order of
2433 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
2436 if (s->cipher_list != NULL) {
2437 return s->cipher_list;
2438 } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
2439 return s->ctx->cipher_list;
2445 STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
2447 if ((s == NULL) || (s->session == NULL) || !s->server)
2449 return s->session->ciphers;
2452 STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
2454 STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
2457 ciphers = SSL_get_ciphers(s);
2460 if (!ssl_set_client_disabled(s))
2462 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
2463 const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
2464 if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) {
2466 sk = sk_SSL_CIPHER_new_null();
2469 if (!sk_SSL_CIPHER_push(sk, c)) {
2470 sk_SSL_CIPHER_free(sk);
2478 /** return a STACK of the ciphers available for the SSL and in order of
2480 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
2483 if (s->cipher_list_by_id != NULL) {
2484 return s->cipher_list_by_id;
2485 } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
2486 return s->ctx->cipher_list_by_id;
2492 /** The old interface to get the same thing as SSL_get_ciphers() */
2493 const char *SSL_get_cipher_list(const SSL *s, int n)
2495 const SSL_CIPHER *c;
2496 STACK_OF(SSL_CIPHER) *sk;
2500 sk = SSL_get_ciphers(s);
2501 if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
2503 c = sk_SSL_CIPHER_value(sk, n);
2509 /** return a STACK of the ciphers available for the SSL_CTX and in order of
2511 STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
2514 return ctx->cipher_list;
2518 /** specify the ciphers to be used by default by the SSL_CTX */
2519 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
2521 STACK_OF(SSL_CIPHER) *sk;
2523 sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list,
2524 &ctx->cipher_list_by_id, str, ctx->cert);
2526 * ssl_create_cipher_list may return an empty stack if it was unable to
2527 * find a cipher matching the given rule string (for example if the rule
2528 * string specifies a cipher which has been disabled). This is not an
2529 * error as far as ssl_create_cipher_list is concerned, and hence
2530 * ctx->cipher_list and ctx->cipher_list_by_id has been updated.
2534 else if (sk_SSL_CIPHER_num(sk) == 0) {
2535 SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2541 /** specify the ciphers to be used by the SSL */
2542 int SSL_set_cipher_list(SSL *s, const char *str)
2544 STACK_OF(SSL_CIPHER) *sk;
2546 sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list,
2547 &s->cipher_list_by_id, str, s->cert);
2548 /* see comment in SSL_CTX_set_cipher_list */
2551 else if (sk_SSL_CIPHER_num(sk) == 0) {
2552 SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
2558 char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len)
2561 STACK_OF(SSL_CIPHER) *sk;
2562 const SSL_CIPHER *c;
2565 if ((s->session == NULL) || (s->session->ciphers == NULL) || (len < 2))
2569 sk = s->session->ciphers;
2571 if (sk_SSL_CIPHER_num(sk) == 0)
2574 for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
2577 c = sk_SSL_CIPHER_value(sk, i);
2578 n = strlen(c->name);
2594 /** return a servername extension value if provided in Client Hello, or NULL.
2595 * So far, only host_name types are defined (RFC 3546).
2598 const char *SSL_get_servername(const SSL *s, const int type)
2600 if (type != TLSEXT_NAMETYPE_host_name)
2603 return s->session && !s->ext.hostname ?
2604 s->session->ext.hostname : s->ext.hostname;
2607 int SSL_get_servername_type(const SSL *s)
2610 && (!s->ext.hostname ? s->session->
2611 ext.hostname : s->ext.hostname))
2612 return TLSEXT_NAMETYPE_host_name;
2617 * SSL_select_next_proto implements the standard protocol selection. It is
2618 * expected that this function is called from the callback set by
2619 * SSL_CTX_set_next_proto_select_cb. The protocol data is assumed to be a
2620 * vector of 8-bit, length prefixed byte strings. The length byte itself is
2621 * not included in the length. A byte string of length 0 is invalid. No byte
2622 * string may be truncated. The current, but experimental algorithm for
2623 * selecting the protocol is: 1) If the server doesn't support NPN then this
2624 * is indicated to the callback. In this case, the client application has to
2625 * abort the connection or have a default application level protocol. 2) If
2626 * the server supports NPN, but advertises an empty list then the client
2627 * selects the first protocol in its list, but indicates via the API that this
2628 * fallback case was enacted. 3) Otherwise, the client finds the first
2629 * protocol in the server's list that it supports and selects this protocol.
2630 * This is because it's assumed that the server has better information about
2631 * which protocol a client should use. 4) If the client doesn't support any
2632 * of the server's advertised protocols, then this is treated the same as
2633 * case 2. It returns either OPENSSL_NPN_NEGOTIATED if a common protocol was
2634 * found, or OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
2636 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
2637 const unsigned char *server,
2638 unsigned int server_len,
2639 const unsigned char *client, unsigned int client_len)
2642 const unsigned char *result;
2643 int status = OPENSSL_NPN_UNSUPPORTED;
2646 * For each protocol in server preference order, see if we support it.
2648 for (i = 0; i < server_len;) {
2649 for (j = 0; j < client_len;) {
2650 if (server[i] == client[j] &&
2651 memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
2652 /* We found a match */
2653 result = &server[i];
2654 status = OPENSSL_NPN_NEGOTIATED;
2664 /* There's no overlap between our protocols and the server's list. */
2666 status = OPENSSL_NPN_NO_OVERLAP;
2669 *out = (unsigned char *)result + 1;
2670 *outlen = result[0];
2674 #ifndef OPENSSL_NO_NEXTPROTONEG
2676 * SSL_get0_next_proto_negotiated sets *data and *len to point to the
2677 * client's requested protocol for this connection and returns 0. If the
2678 * client didn't request any protocol, then *data is set to NULL. Note that
2679 * the client can request any protocol it chooses. The value returned from
2680 * this function need not be a member of the list of supported protocols
2681 * provided by the callback.
2683 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
2690 *len = (unsigned int)s->ext.npn_len;
2695 * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
2696 * a TLS server needs a list of supported protocols for Next Protocol
2697 * Negotiation. The returned list must be in wire format. The list is
2698 * returned by setting |out| to point to it and |outlen| to its length. This
2699 * memory will not be modified, but one should assume that the SSL* keeps a
2700 * reference to it. The callback should return SSL_TLSEXT_ERR_OK if it
2701 * wishes to advertise. Otherwise, no such extension will be included in the
2704 void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
2705 SSL_CTX_npn_advertised_cb_func cb,
2708 ctx->ext.npn_advertised_cb = cb;
2709 ctx->ext.npn_advertised_cb_arg = arg;
2713 * SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
2714 * client needs to select a protocol from the server's provided list. |out|
2715 * must be set to point to the selected protocol (which may be within |in|).
2716 * The length of the protocol name must be written into |outlen|. The
2717 * server's advertised protocols are provided in |in| and |inlen|. The
2718 * callback can assume that |in| is syntactically valid. The client must
2719 * select a protocol. It is fatal to the connection if this callback returns
2720 * a value other than SSL_TLSEXT_ERR_OK.
2722 void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
2723 SSL_CTX_npn_select_cb_func cb,
2726 ctx->ext.npn_select_cb = cb;
2727 ctx->ext.npn_select_cb_arg = arg;
2732 * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
2733 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2734 * length-prefixed strings). Returns 0 on success.
2736 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
2737 unsigned int protos_len)
2739 OPENSSL_free(ctx->ext.alpn);
2740 ctx->ext.alpn = OPENSSL_memdup(protos, protos_len);
2741 if (ctx->ext.alpn == NULL) {
2742 SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2745 ctx->ext.alpn_len = protos_len;
2751 * SSL_set_alpn_protos sets the ALPN protocol list on |ssl| to |protos|.
2752 * |protos| must be in wire-format (i.e. a series of non-empty, 8-bit
2753 * length-prefixed strings). Returns 0 on success.
2755 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
2756 unsigned int protos_len)
2758 OPENSSL_free(ssl->ext.alpn);
2759 ssl->ext.alpn = OPENSSL_memdup(protos, protos_len);
2760 if (ssl->ext.alpn == NULL) {
2761 SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
2764 ssl->ext.alpn_len = protos_len;
2770 * SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is
2771 * called during ClientHello processing in order to select an ALPN protocol
2772 * from the client's list of offered protocols.
2774 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
2775 SSL_CTX_alpn_select_cb_func cb,
2778 ctx->ext.alpn_select_cb = cb;
2779 ctx->ext.alpn_select_cb_arg = arg;
2783 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
2784 * On return it sets |*data| to point to |*len| bytes of protocol name
2785 * (not including the leading length-prefix byte). If the server didn't
2786 * respond with a negotiated protocol then |*len| will be zero.
2788 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
2793 *data = ssl->s3->alpn_selected;
2797 *len = (unsigned int)ssl->s3->alpn_selected_len;
2800 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
2801 const char *label, size_t llen,
2802 const unsigned char *context, size_t contextlen,
2805 if (s->version < TLS1_VERSION && s->version != DTLS1_BAD_VER)
2808 return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
2810 contextlen, use_context);
2813 static unsigned long ssl_session_hash(const SSL_SESSION *a)
2815 const unsigned char *session_id = a->session_id;
2817 unsigned char tmp_storage[4];
2819 if (a->session_id_length < sizeof(tmp_storage)) {
2820 memset(tmp_storage, 0, sizeof(tmp_storage));
2821 memcpy(tmp_storage, a->session_id, a->session_id_length);
2822 session_id = tmp_storage;
2826 ((unsigned long)session_id[0]) |
2827 ((unsigned long)session_id[1] << 8L) |
2828 ((unsigned long)session_id[2] << 16L) |
2829 ((unsigned long)session_id[3] << 24L);
2834 * NB: If this function (or indeed the hash function which uses a sort of
2835 * coarser function than this one) is changed, ensure
2836 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on
2837 * being able to construct an SSL_SESSION that will collide with any existing
2838 * session with a matching session ID.
2840 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
2842 if (a->ssl_version != b->ssl_version)
2844 if (a->session_id_length != b->session_id_length)
2846 return memcmp(a->session_id, b->session_id, a->session_id_length);
2850 * These wrapper functions should remain rather than redeclaring
2851 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
2852 * variable. The reason is that the functions aren't static, they're exposed
2856 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
2858 SSL_CTX *ret = NULL;
2861 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED);
2865 if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
2868 if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
2869 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
2872 ret = OPENSSL_zalloc(sizeof(*ret));
2877 ret->min_proto_version = 0;
2878 ret->max_proto_version = 0;
2879 ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
2880 ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
2881 /* We take the system default. */
2882 ret->session_timeout = meth->get_timeout();
2883 ret->references = 1;
2884 ret->lock = CRYPTO_THREAD_lock_new();
2885 if (ret->lock == NULL) {
2886 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
2890 ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
2891 ret->verify_mode = SSL_VERIFY_NONE;
2892 if ((ret->cert = ssl_cert_new()) == NULL)
2895 ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
2896 if (ret->sessions == NULL)
2898 ret->cert_store = X509_STORE_new();
2899 if (ret->cert_store == NULL)
2901 #ifndef OPENSSL_NO_CT
2902 ret->ctlog_store = CTLOG_STORE_new();
2903 if (ret->ctlog_store == NULL)
2906 if (!ssl_create_cipher_list(ret->method,
2907 &ret->cipher_list, &ret->cipher_list_by_id,
2908 SSL_DEFAULT_CIPHER_LIST, ret->cert)
2909 || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
2910 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS);
2914 ret->param = X509_VERIFY_PARAM_new();
2915 if (ret->param == NULL)
2918 if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
2919 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
2922 if ((ret->sha1 = EVP_get_digestbyname("ssl3-sha1")) == NULL) {
2923 SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
2927 if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL)
2930 if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
2933 /* No compression for DTLS */
2934 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
2935 ret->comp_methods = SSL_COMP_get_compression_methods();
2937 ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2938 ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
2940 /* Setup RFC5077 ticket keys */
2941 if ((RAND_bytes(ret->ext.tick_key_name,
2942 sizeof(ret->ext.tick_key_name)) <= 0)
2943 || (RAND_bytes(ret->ext.tick_hmac_key,
2944 sizeof(ret->ext.tick_hmac_key)) <= 0)
2945 || (RAND_bytes(ret->ext.tick_aes_key,
2946 sizeof(ret->ext.tick_aes_key)) <= 0))
2947 ret->options |= SSL_OP_NO_TICKET;
2949 if (RAND_bytes(ret->ext.cookie_hmac_key,
2950 sizeof(ret->ext.cookie_hmac_key)) <= 0)
2953 #ifndef OPENSSL_NO_SRP
2954 if (!SSL_CTX_SRP_CTX_init(ret))
2957 #ifndef OPENSSL_NO_ENGINE
2958 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
2959 # define eng_strx(x) #x
2960 # define eng_str(x) eng_strx(x)
2961 /* Use specific client engine automatically... ignore errors */
2964 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2967 ENGINE_load_builtin_engines();
2968 eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
2970 if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
2976 * Default is to connect to non-RI servers. When RI is more widely
2977 * deployed might change this.
2979 ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
2981 * Disable compression by default to prevent CRIME. Applications can
2982 * re-enable compression by configuring
2983 * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
2984 * or by using the SSL_CONF library. Similarly we also enable TLSv1.3
2985 * middlebox compatibility by default. This may be disabled by default in
2986 * a later OpenSSL version.
2988 ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT;
2990 ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
2993 * Default max early data is a fully loaded single record. Could be split
2994 * across multiple records in practice
2996 ret->max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
3000 SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
3006 int SSL_CTX_up_ref(SSL_CTX *ctx)
3010 if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
3013 REF_PRINT_COUNT("SSL_CTX", ctx);
3014 REF_ASSERT_ISNT(i < 2);
3015 return ((i > 1) ? 1 : 0);
3018 void SSL_CTX_free(SSL_CTX *a)
3025 CRYPTO_DOWN_REF(&a->references, &i, a->lock);
3026 REF_PRINT_COUNT("SSL_CTX", a);
3029 REF_ASSERT_ISNT(i < 0);
3031 X509_VERIFY_PARAM_free(a->param);
3032 dane_ctx_final(&a->dane);
3035 * Free internal session cache. However: the remove_cb() may reference
3036 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
3037 * after the sessions were flushed.
3038 * As the ex_data handling routines might also touch the session cache,
3039 * the most secure solution seems to be: empty (flush) the cache, then
3040 * free ex_data, then finally free the cache.
3041 * (See ticket [openssl.org #212].)
3043 if (a->sessions != NULL)
3044 SSL_CTX_flush_sessions(a, 0);
3046 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
3047 lh_SSL_SESSION_free(a->sessions);
3048 X509_STORE_free(a->cert_store);
3049 #ifndef OPENSSL_NO_CT
3050 CTLOG_STORE_free(a->ctlog_store);
3052 sk_SSL_CIPHER_free(a->cipher_list);
3053 sk_SSL_CIPHER_free(a->cipher_list_by_id);
3054 ssl_cert_free(a->cert);
3055 sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free);
3056 sk_X509_pop_free(a->extra_certs, X509_free);
3057 a->comp_methods = NULL;
3058 #ifndef OPENSSL_NO_SRTP
3059 sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
3061 #ifndef OPENSSL_NO_SRP
3062 SSL_CTX_SRP_CTX_free(a);
3064 #ifndef OPENSSL_NO_ENGINE
3065 ENGINE_finish(a->client_cert_engine);
3068 #ifndef OPENSSL_NO_EC
3069 OPENSSL_free(a->ext.ecpointformats);
3070 OPENSSL_free(a->ext.supportedgroups);
3072 OPENSSL_free(a->ext.alpn);
3074 CRYPTO_THREAD_lock_free(a->lock);
3079 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
3081 ctx->default_passwd_callback = cb;
3084 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
3086 ctx->default_passwd_callback_userdata = u;
3089 pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
3091 return ctx->default_passwd_callback;
3094 void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
3096 return ctx->default_passwd_callback_userdata;
3099 void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
3101 s->default_passwd_callback = cb;
3104 void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
3106 s->default_passwd_callback_userdata = u;
3109 pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
3111 return s->default_passwd_callback;
3114 void *SSL_get_default_passwd_cb_userdata(SSL *s)
3116 return s->default_passwd_callback_userdata;
3119 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
3120 int (*cb) (X509_STORE_CTX *, void *),
3123 ctx->app_verify_callback = cb;
3124 ctx->app_verify_arg = arg;
3127 void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
3128 int (*cb) (int, X509_STORE_CTX *))
3130 ctx->verify_mode = mode;
3131 ctx->default_verify_callback = cb;
3134 void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
3136 X509_VERIFY_PARAM_set_depth(ctx->param, depth);
3139 void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
3141 ssl_cert_set_cert_cb(c->cert, cb, arg);
3144 void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
3146 ssl_cert_set_cert_cb(s->cert, cb, arg);
3149 void ssl_set_masks(SSL *s)
3152 uint32_t *pvalid = s->s3->tmp.valid_flags;
3153 int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
3154 unsigned long mask_k, mask_a;
3155 #ifndef OPENSSL_NO_EC
3156 int have_ecc_cert, ecdsa_ok;
3161 #ifndef OPENSSL_NO_DH
3162 dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
3167 rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3168 rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
3169 dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
3170 #ifndef OPENSSL_NO_EC
3171 have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
3177 fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n",
3178 dh_tmp, rsa_enc, rsa_sign, dsa_sign);
3181 #ifndef OPENSSL_NO_GOST
3182 if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
3183 mask_k |= SSL_kGOST;
3184 mask_a |= SSL_aGOST12;
3186 if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
3187 mask_k |= SSL_kGOST;
3188 mask_a |= SSL_aGOST12;
3190 if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
3191 mask_k |= SSL_kGOST;
3192 mask_a |= SSL_aGOST01;
3203 * If we only have an RSA-PSS certificate allow RSA authentication
3204 * if TLS 1.2 and peer supports it.
3207 if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN)
3208 && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN
3209 && TLS1_get_version(s) == TLS1_2_VERSION))
3216 mask_a |= SSL_aNULL;
3219 * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
3220 * depending on the key usage extension.
3222 #ifndef OPENSSL_NO_EC
3223 if (have_ecc_cert) {
3225 ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
3226 ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
3227 if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
3230 mask_a |= SSL_aECDSA;
3232 /* Allow Ed25519 for TLS 1.2 if peer supports it */
3233 if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519)
3234 && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
3235 && TLS1_get_version(s) == TLS1_2_VERSION)
3236 mask_a |= SSL_aECDSA;
3239 #ifndef OPENSSL_NO_EC
3240 mask_k |= SSL_kECDHE;
3243 #ifndef OPENSSL_NO_PSK
3246 if (mask_k & SSL_kRSA)
3247 mask_k |= SSL_kRSAPSK;
3248 if (mask_k & SSL_kDHE)
3249 mask_k |= SSL_kDHEPSK;
3250 if (mask_k & SSL_kECDHE)
3251 mask_k |= SSL_kECDHEPSK;
3254 s->s3->tmp.mask_k = mask_k;
3255 s->s3->tmp.mask_a = mask_a;
3258 #ifndef OPENSSL_NO_EC
3260 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
3262 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
3263 /* key usage, if present, must allow signing */
3264 if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
3265 SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
3266 SSL_R_ECC_CERT_NOT_FOR_SIGNING);
3270 return 1; /* all checks are ok */
3275 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
3276 size_t *serverinfo_length)
3278 CERT_PKEY *cpk = s->s3->tmp.cert;
3279 *serverinfo_length = 0;
3281 if (cpk == NULL || cpk->serverinfo == NULL)
3284 *serverinfo = cpk->serverinfo;
3285 *serverinfo_length = cpk->serverinfo_length;
3289 void ssl_update_cache(SSL *s, int mode)
3294 * If the session_id_length is 0, we are not supposed to cache it, and it
3295 * would be rather hard to do anyway :-)
3297 if (s->session->session_id_length == 0)
3300 i = s->session_ctx->session_cache_mode;
3302 && (!s->hit || SSL_IS_TLS13(s))
3303 && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) != 0
3304 || SSL_CTX_add_session(s->session_ctx, s->session))
3305 && s->session_ctx->new_session_cb != NULL) {
3306 SSL_SESSION_up_ref(s->session);
3307 if (!s->session_ctx->new_session_cb(s, s->session))
3308 SSL_SESSION_free(s->session);
3311 /* auto flush every 255 connections */
3312 if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
3314 if (mode & SSL_SESS_CACHE_CLIENT)
3315 stat = &s->session_ctx->stats.sess_connect_good;
3317 stat = &s->session_ctx->stats.sess_accept_good;
3318 if (CRYPTO_atomic_read(stat, &val, s->session_ctx->lock)
3319 && (val & 0xff) == 0xff)
3320 SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
3324 const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
3329 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
3334 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
3338 if (s->method != meth) {
3339 const SSL_METHOD *sm = s->method;
3340 int (*hf) (SSL *) = s->handshake_func;
3342 if (sm->version == meth->version)
3347 ret = s->method->ssl_new(s);
3350 if (hf == sm->ssl_connect)
3351 s->handshake_func = meth->ssl_connect;
3352 else if (hf == sm->ssl_accept)
3353 s->handshake_func = meth->ssl_accept;
3358 int SSL_get_error(const SSL *s, int i)
3365 return SSL_ERROR_NONE;
3368 * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
3369 * where we do encode the error
3371 if ((l = ERR_peek_error()) != 0) {
3372 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
3373 return SSL_ERROR_SYSCALL;
3375 return SSL_ERROR_SSL;
3378 if (SSL_want_read(s)) {
3379 bio = SSL_get_rbio(s);
3380 if (BIO_should_read(bio))
3381 return SSL_ERROR_WANT_READ;
3382 else if (BIO_should_write(bio))
3384 * This one doesn't make too much sense ... We never try to write
3385 * to the rbio, and an application program where rbio and wbio
3386 * are separate couldn't even know what it should wait for.
3387 * However if we ever set s->rwstate incorrectly (so that we have
3388 * SSL_want_read(s) instead of SSL_want_write(s)) and rbio and
3389 * wbio *are* the same, this test works around that bug; so it
3390 * might be safer to keep it.
3392 return SSL_ERROR_WANT_WRITE;
3393 else if (BIO_should_io_special(bio)) {
3394 reason = BIO_get_retry_reason(bio);
3395 if (reason == BIO_RR_CONNECT)
3396 return SSL_ERROR_WANT_CONNECT;
3397 else if (reason == BIO_RR_ACCEPT)
3398 return SSL_ERROR_WANT_ACCEPT;
3400 return SSL_ERROR_SYSCALL; /* unknown */
3404 if (SSL_want_write(s)) {
3405 /* Access wbio directly - in order to use the buffered bio if present */
3407 if (BIO_should_write(bio))
3408 return SSL_ERROR_WANT_WRITE;
3409 else if (BIO_should_read(bio))
3411 * See above (SSL_want_read(s) with BIO_should_write(bio))
3413 return SSL_ERROR_WANT_READ;
3414 else if (BIO_should_io_special(bio)) {
3415 reason = BIO_get_retry_reason(bio);
3416 if (reason == BIO_RR_CONNECT)
3417 return SSL_ERROR_WANT_CONNECT;
3418 else if (reason == BIO_RR_ACCEPT)
3419 return SSL_ERROR_WANT_ACCEPT;
3421 return SSL_ERROR_SYSCALL;
3424 if (SSL_want_x509_lookup(s))
3425 return SSL_ERROR_WANT_X509_LOOKUP;
3426 if (SSL_want_async(s))
3427 return SSL_ERROR_WANT_ASYNC;
3428 if (SSL_want_async_job(s))
3429 return SSL_ERROR_WANT_ASYNC_JOB;
3430 if (SSL_want_client_hello_cb(s))
3431 return SSL_ERROR_WANT_CLIENT_HELLO_CB;
3433 if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
3434 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
3435 return SSL_ERROR_ZERO_RETURN;
3437 return SSL_ERROR_SYSCALL;
3440 static int ssl_do_handshake_intern(void *vargs)
3442 struct ssl_async_args *args;
3445 args = (struct ssl_async_args *)vargs;
3448 return s->handshake_func(s);
3451 int SSL_do_handshake(SSL *s)
3455 if (s->handshake_func == NULL) {
3456 SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET);
3460 ossl_statem_check_finish_init(s, -1);
3462 s->method->ssl_renegotiate_check(s, 0);
3464 if (SSL_is_server(s)) {
3465 /* clear SNI settings at server-side */
3466 OPENSSL_free(s->ext.hostname);
3467 s->ext.hostname = NULL;
3470 if (SSL_in_init(s) || SSL_in_before(s)) {
3471 if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
3472 struct ssl_async_args args;
3476 ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
3478 ret = s->handshake_func(s);
3484 void SSL_set_accept_state(SSL *s)
3488 ossl_statem_clear(s);
3489 s->handshake_func = s->method->ssl_accept;
3493 void SSL_set_connect_state(SSL *s)
3497 ossl_statem_clear(s);
3498 s->handshake_func = s->method->ssl_connect;
3502 int ssl_undefined_function(SSL *s)
3504 SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3508 int ssl_undefined_void_function(void)
3510 SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
3511 ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3515 int ssl_undefined_const_function(const SSL *s)
3520 const SSL_METHOD *ssl_bad_method(int ver)
3522 SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
3526 const char *ssl_protocol_to_string(int version)
3530 case TLS1_3_VERSION:
3533 case TLS1_2_VERSION:
3536 case TLS1_1_VERSION:
3551 case DTLS1_2_VERSION:
3559 const char *SSL_get_version(const SSL *s)
3561 return ssl_protocol_to_string(s->version);
3564 SSL *SSL_dup(SSL *s)
3566 STACK_OF(X509_NAME) *sk;
3571 /* If we're not quiescent, just up_ref! */
3572 if (!SSL_in_init(s) || !SSL_in_before(s)) {
3573 CRYPTO_UP_REF(&s->references, &i, s->lock);
3578 * Otherwise, copy configuration state, and session if set.
3580 if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
3583 if (s->session != NULL) {
3585 * Arranges to share the same session via up_ref. This "copies"
3586 * session-id, SSL_METHOD, sid_ctx, and 'cert'
3588 if (!SSL_copy_session_id(ret, s))
3592 * No session has been established yet, so we have to expect that
3593 * s->cert or ret->cert will be changed later -- they should not both
3594 * point to the same object, and thus we can't use
3595 * SSL_copy_session_id.
3597 if (!SSL_set_ssl_method(ret, s->method))
3600 if (s->cert != NULL) {
3601 ssl_cert_free(ret->cert);
3602 ret->cert = ssl_cert_dup(s->cert);
3603 if (ret->cert == NULL)
3607 if (!SSL_set_session_id_context(ret, s->sid_ctx,
3608 (int)s->sid_ctx_length))
3612 if (!ssl_dane_dup(ret, s))
3614 ret->version = s->version;
3615 ret->options = s->options;
3616 ret->mode = s->mode;
3617 SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
3618 SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
3619 ret->msg_callback = s->msg_callback;
3620 ret->msg_callback_arg = s->msg_callback_arg;
3621 SSL_set_verify(ret, SSL_get_verify_mode(s), SSL_get_verify_callback(s));
3622 SSL_set_verify_depth(ret, SSL_get_verify_depth(s));
3623 ret->generate_session_id = s->generate_session_id;
3625 SSL_set_info_callback(ret, SSL_get_info_callback(s));
3627 /* copy app data, a little dangerous perhaps */
3628 if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
3631 /* setup rbio, and wbio */
3632 if (s->rbio != NULL) {
3633 if (!BIO_dup_state(s->rbio, (char *)&ret->rbio))
3636 if (s->wbio != NULL) {
3637 if (s->wbio != s->rbio) {
3638 if (!BIO_dup_state(s->wbio, (char *)&ret->wbio))
3641 BIO_up_ref(ret->rbio);
3642 ret->wbio = ret->rbio;
3646 ret->server = s->server;
3647 if (s->handshake_func) {
3649 SSL_set_accept_state(ret);
3651 SSL_set_connect_state(ret);
3653 ret->shutdown = s->shutdown;
3656 ret->default_passwd_callback = s->default_passwd_callback;
3657 ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;
3659 X509_VERIFY_PARAM_inherit(ret->param, s->param);
3661 /* dup the cipher_list and cipher_list_by_id stacks */
3662 if (s->cipher_list != NULL) {
3663 if ((ret->cipher_list = sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
3666 if (s->cipher_list_by_id != NULL)
3667 if ((ret->cipher_list_by_id = sk_SSL_CIPHER_dup(s->cipher_list_by_id))
3671 /* Dup the client_CA list */
3672 if (s->ca_names != NULL) {
3673 if ((sk = sk_X509_NAME_dup(s->ca_names)) == NULL)
3676 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
3677 xn = sk_X509_NAME_value(sk, i);
3678 if (sk_X509_NAME_set(sk, i, X509_NAME_dup(xn)) == NULL) {
3691 void ssl_clear_cipher_ctx(SSL *s)
3693 if (s->enc_read_ctx != NULL) {
3694 EVP_CIPHER_CTX_free(s->enc_read_ctx);
3695 s->enc_read_ctx = NULL;
3697 if (s->enc_write_ctx != NULL) {
3698 EVP_CIPHER_CTX_free(s->enc_write_ctx);
3699 s->enc_write_ctx = NULL;
3701 #ifndef OPENSSL_NO_COMP
3702 COMP_CTX_free(s->expand);
3704 COMP_CTX_free(s->compress);
3709 X509 *SSL_get_certificate(const SSL *s)
3711 if (s->cert != NULL)
3712 return s->cert->key->x509;
3717 EVP_PKEY *SSL_get_privatekey(const SSL *s)
3719 if (s->cert != NULL)
3720 return s->cert->key->privatekey;
3725 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
3727 if (ctx->cert != NULL)
3728 return ctx->cert->key->x509;
3733 EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
3735 if (ctx->cert != NULL)
3736 return ctx->cert->key->privatekey;
3741 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
3743 if ((s->session != NULL) && (s->session->cipher != NULL))
3744 return s->session->cipher;
3748 const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s)
3750 return s->s3->tmp.new_cipher;
3753 const COMP_METHOD *SSL_get_current_compression(SSL *s)
3755 #ifndef OPENSSL_NO_COMP
3756 return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
3762 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
3764 #ifndef OPENSSL_NO_COMP
3765 return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
3771 int ssl_init_wbio_buffer(SSL *s)
3775 if (s->bbio != NULL) {
3776 /* Already buffered. */
3780 bbio = BIO_new(BIO_f_buffer());
3781 if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) {
3783 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB);
3787 s->wbio = BIO_push(bbio, s->wbio);
3792 int ssl_free_wbio_buffer(SSL *s)
3794 /* callers ensure s is never null */
3795 if (s->bbio == NULL)
3798 s->wbio = BIO_pop(s->wbio);
3799 if (!ossl_assert(s->wbio != NULL))
3807 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
3809 ctx->quiet_shutdown = mode;
3812 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
3814 return ctx->quiet_shutdown;
3817 void SSL_set_quiet_shutdown(SSL *s, int mode)
3819 s->quiet_shutdown = mode;
3822 int SSL_get_quiet_shutdown(const SSL *s)
3824 return s->quiet_shutdown;
3827 void SSL_set_shutdown(SSL *s, int mode)
3832 int SSL_get_shutdown(const SSL *s)
3837 int SSL_version(const SSL *s)
3842 int SSL_client_version(const SSL *s)
3844 return s->client_version;
3847 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
3852 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
3855 if (ssl->ctx == ctx)
3858 ctx = ssl->session_ctx;
3859 new_cert = ssl_cert_dup(ctx->cert);
3860 if (new_cert == NULL) {
3864 if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) {
3865 ssl_cert_free(new_cert);
3869 ssl_cert_free(ssl->cert);
3870 ssl->cert = new_cert;
3873 * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
3874 * so setter APIs must prevent invalid lengths from entering the system.
3876 if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)))
3880 * If the session ID context matches that of the parent SSL_CTX,
3881 * inherit it from the new SSL_CTX as well. If however the context does
3882 * not match (i.e., it was set per-ssl with SSL_set_session_id_context),
3883 * leave it unchanged.
3885 if ((ssl->ctx != NULL) &&
3886 (ssl->sid_ctx_length == ssl->ctx->sid_ctx_length) &&
3887 (memcmp(ssl->sid_ctx, ssl->ctx->sid_ctx, ssl->sid_ctx_length) == 0)) {
3888 ssl->sid_ctx_length = ctx->sid_ctx_length;
3889 memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
3892 SSL_CTX_up_ref(ctx);
3893 SSL_CTX_free(ssl->ctx); /* decrement reference count */
3899 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
3901 return X509_STORE_set_default_paths(ctx->cert_store);
3904 int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
3906 X509_LOOKUP *lookup;
3908 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
3911 X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
3913 /* Clear any errors if the default directory does not exist */
3919 int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
3921 X509_LOOKUP *lookup;
3923 lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
3927 X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
3929 /* Clear any errors if the default file does not exist */
3935 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
3938 return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath);
3941 void SSL_set_info_callback(SSL *ssl,
3942 void (*cb) (const SSL *ssl, int type, int val))
3944 ssl->info_callback = cb;
3948 * One compiler (Diab DCC) doesn't like argument names in returned function
3951 void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
3954 return ssl->info_callback;
3957 void SSL_set_verify_result(SSL *ssl, long arg)
3959 ssl->verify_result = arg;
3962 long SSL_get_verify_result(const SSL *ssl)
3964 return ssl->verify_result;
3967 size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
3970 return sizeof(ssl->s3->client_random);
3971 if (outlen > sizeof(ssl->s3->client_random))
3972 outlen = sizeof(ssl->s3->client_random);
3973 memcpy(out, ssl->s3->client_random, outlen);
3977 size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
3980 return sizeof(ssl->s3->server_random);
3981 if (outlen > sizeof(ssl->s3->server_random))
3982 outlen = sizeof(ssl->s3->server_random);
3983 memcpy(out, ssl->s3->server_random, outlen);
3987 size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
3988 unsigned char *out, size_t outlen)
3991 return session->master_key_length;
3992 if (outlen > session->master_key_length)
3993 outlen = session->master_key_length;
3994 memcpy(out, session->master_key, outlen);
3998 int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in,
4001 if (len > sizeof(sess->master_key))
4004 memcpy(sess->master_key, in, len);
4005 sess->master_key_length = len;
4010 int SSL_set_ex_data(SSL *s, int idx, void *arg)
4012 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4015 void *SSL_get_ex_data(const SSL *s, int idx)
4017 return CRYPTO_get_ex_data(&s->ex_data, idx);
4020 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
4022 return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
4025 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
4027 return CRYPTO_get_ex_data(&s->ex_data, idx);
4030 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
4032 return ctx->cert_store;
4035 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
4037 X509_STORE_free(ctx->cert_store);
4038 ctx->cert_store = store;
4041 void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
4044 X509_STORE_up_ref(store);
4045 SSL_CTX_set_cert_store(ctx, store);
4048 int SSL_want(const SSL *s)
4054 * \brief Set the callback for generating temporary DH keys.
4055 * \param ctx the SSL context.
4056 * \param dh the callback
4059 #ifndef OPENSSL_NO_DH
4060 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
4061 DH *(*dh) (SSL *ssl, int is_export,
4064 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4067 void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export,
4070 SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh);
4074 #ifndef OPENSSL_NO_PSK
4075 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
4077 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4078 SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4081 OPENSSL_free(ctx->cert->psk_identity_hint);
4082 if (identity_hint != NULL) {
4083 ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4084 if (ctx->cert->psk_identity_hint == NULL)
4087 ctx->cert->psk_identity_hint = NULL;
4091 int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
4096 if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
4097 SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
4100 OPENSSL_free(s->cert->psk_identity_hint);
4101 if (identity_hint != NULL) {
4102 s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
4103 if (s->cert->psk_identity_hint == NULL)
4106 s->cert->psk_identity_hint = NULL;
4110 const char *SSL_get_psk_identity_hint(const SSL *s)
4112 if (s == NULL || s->session == NULL)
4114 return s->session->psk_identity_hint;
4117 const char *SSL_get_psk_identity(const SSL *s)
4119 if (s == NULL || s->session == NULL)
4121 return s->session->psk_identity;
4124 void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
4126 s->psk_client_callback = cb;
4129 void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
4131 ctx->psk_client_callback = cb;
4134 void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
4136 s->psk_server_callback = cb;
4139 void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
4141 ctx->psk_server_callback = cb;
4145 void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb)
4147 s->psk_find_session_cb = cb;
4150 void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
4151 SSL_psk_find_session_cb_func cb)
4153 ctx->psk_find_session_cb = cb;
4156 void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
4158 s->psk_use_session_cb = cb;
4161 void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx,
4162 SSL_psk_use_session_cb_func cb)
4164 ctx->psk_use_session_cb = cb;
4167 void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
4168 void (*cb) (int write_p, int version,
4169 int content_type, const void *buf,
4170 size_t len, SSL *ssl, void *arg))
4172 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4175 void SSL_set_msg_callback(SSL *ssl,
4176 void (*cb) (int write_p, int version,
4177 int content_type, const void *buf,
4178 size_t len, SSL *ssl, void *arg))
4180 SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
4183 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
4184 int (*cb) (SSL *ssl,
4188 SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4189 (void (*)(void))cb);
4192 void SSL_set_not_resumable_session_callback(SSL *ssl,
4193 int (*cb) (SSL *ssl,
4194 int is_forward_secure))
4196 SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
4197 (void (*)(void))cb);
4200 void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx,
4201 size_t (*cb) (SSL *ssl, int type,
4202 size_t len, void *arg))
4204 ctx->record_padding_cb = cb;
4207 void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg)
4209 ctx->record_padding_arg = arg;
4212 void *SSL_CTX_get_record_padding_callback_arg(SSL_CTX *ctx)
4214 return ctx->record_padding_arg;
4217 int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size)
4219 /* block size of 0 or 1 is basically no padding */
4220 if (block_size == 1)
4221 ctx->block_padding = 0;
4222 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4223 ctx->block_padding = block_size;
4229 void SSL_set_record_padding_callback(SSL *ssl,
4230 size_t (*cb) (SSL *ssl, int type,
4231 size_t len, void *arg))
4233 ssl->record_padding_cb = cb;
4236 void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg)
4238 ssl->record_padding_arg = arg;
4241 void *SSL_get_record_padding_callback_arg(SSL *ssl)
4243 return ssl->record_padding_arg;
4246 int SSL_set_block_padding(SSL *ssl, size_t block_size)
4248 /* block size of 0 or 1 is basically no padding */
4249 if (block_size == 1)
4250 ssl->block_padding = 0;
4251 else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
4252 ssl->block_padding = block_size;
4259 * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
4260 * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
4261 * If EVP_MD pointer is passed, initializes ctx with this |md|.
4262 * Returns the newly allocated ctx;
4265 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
4267 ssl_clear_hash_ctx(hash);
4268 *hash = EVP_MD_CTX_new();
4269 if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
4270 EVP_MD_CTX_free(*hash);
4277 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
4280 EVP_MD_CTX_free(*hash);
4284 /* Retrieve handshake hashes */
4285 int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
4288 EVP_MD_CTX *ctx = NULL;
4289 EVP_MD_CTX *hdgst = s->s3->handshake_dgst;
4290 int hashleni = EVP_MD_CTX_size(hdgst);
4293 if (hashleni < 0 || (size_t)hashleni > outlen) {
4294 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4295 ERR_R_INTERNAL_ERROR);
4299 ctx = EVP_MD_CTX_new();
4303 if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
4304 || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) {
4305 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
4306 ERR_R_INTERNAL_ERROR);
4310 *hashlen = hashleni;
4314 EVP_MD_CTX_free(ctx);
4318 int SSL_session_reused(SSL *s)
4323 int SSL_is_server(const SSL *s)
4328 #if OPENSSL_API_COMPAT < 0x10100000L
4329 void SSL_set_debug(SSL *s, int debug)
4331 /* Old function was do-nothing anyway... */
4337 void SSL_set_security_level(SSL *s, int level)
4339 s->cert->sec_level = level;
4342 int SSL_get_security_level(const SSL *s)
4344 return s->cert->sec_level;
4347 void SSL_set_security_callback(SSL *s,
4348 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4349 int op, int bits, int nid,
4350 void *other, void *ex))
4352 s->cert->sec_cb = cb;
4355 int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
4356 const SSL_CTX *ctx, int op,
4357 int bits, int nid, void *other,
4359 return s->cert->sec_cb;
4362 void SSL_set0_security_ex_data(SSL *s, void *ex)
4364 s->cert->sec_ex = ex;
4367 void *SSL_get0_security_ex_data(const SSL *s)
4369 return s->cert->sec_ex;
4372 void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
4374 ctx->cert->sec_level = level;
4377 int SSL_CTX_get_security_level(const SSL_CTX *ctx)
4379 return ctx->cert->sec_level;
4382 void SSL_CTX_set_security_callback(SSL_CTX *ctx,
4383 int (*cb) (const SSL *s, const SSL_CTX *ctx,
4384 int op, int bits, int nid,
4385 void *other, void *ex))
4387 ctx->cert->sec_cb = cb;
4390 int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
4396 return ctx->cert->sec_cb;
4399 void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
4401 ctx->cert->sec_ex = ex;
4404 void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
4406 return ctx->cert->sec_ex;
4410 * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that
4411 * can return unsigned long, instead of the generic long return value from the
4412 * control interface.
4414 unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
4416 return ctx->options;
4419 unsigned long SSL_get_options(const SSL *s)
4424 unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op)
4426 return ctx->options |= op;
4429 unsigned long SSL_set_options(SSL *s, unsigned long op)
4431 return s->options |= op;
4434 unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op)
4436 return ctx->options &= ~op;
4439 unsigned long SSL_clear_options(SSL *s, unsigned long op)
4441 return s->options &= ~op;
4444 STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
4446 return s->verified_chain;
4449 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
4451 #ifndef OPENSSL_NO_CT
4454 * Moves SCTs from the |src| stack to the |dst| stack.
4455 * The source of each SCT will be set to |origin|.
4456 * If |dst| points to a NULL pointer, a new stack will be created and owned by
4458 * Returns the number of SCTs moved, or a negative integer if an error occurs.
4460 static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
4461 sct_source_t origin)
4467 *dst = sk_SCT_new_null();
4469 SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE);
4474 while ((sct = sk_SCT_pop(src)) != NULL) {
4475 if (SCT_set_source(sct, origin) != 1)
4478 if (sk_SCT_push(*dst, sct) <= 0)
4486 sk_SCT_push(src, sct); /* Put the SCT back */
4491 * Look for data collected during ServerHello and parse if found.
4492 * Returns the number of SCTs extracted.
4494 static int ct_extract_tls_extension_scts(SSL *s)
4496 int scts_extracted = 0;
4498 if (s->ext.scts != NULL) {
4499 const unsigned char *p = s->ext.scts;
4500 STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
4502 scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
4504 SCT_LIST_free(scts);
4507 return scts_extracted;
4511 * Checks for an OCSP response and then attempts to extract any SCTs found if it
4512 * contains an SCT X509 extension. They will be stored in |s->scts|.
4514 * - The number of SCTs extracted, assuming an OCSP response exists.
4515 * - 0 if no OCSP response exists or it contains no SCTs.
4516 * - A negative integer if an error occurs.
4518 static int ct_extract_ocsp_response_scts(SSL *s)
4520 # ifndef OPENSSL_NO_OCSP
4521 int scts_extracted = 0;
4522 const unsigned char *p;
4523 OCSP_BASICRESP *br = NULL;
4524 OCSP_RESPONSE *rsp = NULL;
4525 STACK_OF(SCT) *scts = NULL;
4528 if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
4531 p = s->ext.ocsp.resp;
4532 rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
4536 br = OCSP_response_get1_basic(rsp);
4540 for (i = 0; i < OCSP_resp_count(br); ++i) {
4541 OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
4547 OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
4549 ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
4550 if (scts_extracted < 0)
4554 SCT_LIST_free(scts);
4555 OCSP_BASICRESP_free(br);
4556 OCSP_RESPONSE_free(rsp);
4557 return scts_extracted;
4559 /* Behave as if no OCSP response exists */
4565 * Attempts to extract SCTs from the peer certificate.
4566 * Return the number of SCTs extracted, or a negative integer if an error
4569 static int ct_extract_x509v3_extension_scts(SSL *s)
4571 int scts_extracted = 0;
4572 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4575 STACK_OF(SCT) *scts =
4576 X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
4579 ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
4581 SCT_LIST_free(scts);
4584 return scts_extracted;
4588 * Attempts to find all received SCTs by checking TLS extensions, the OCSP
4589 * response (if it exists) and X509v3 extensions in the certificate.
4590 * Returns NULL if an error occurs.
4592 const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
4594 if (!s->scts_parsed) {
4595 if (ct_extract_tls_extension_scts(s) < 0 ||
4596 ct_extract_ocsp_response_scts(s) < 0 ||
4597 ct_extract_x509v3_extension_scts(s) < 0)
4607 static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
4608 const STACK_OF(SCT) *scts, void *unused_arg)
4613 static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
4614 const STACK_OF(SCT) *scts, void *unused_arg)
4616 int count = scts != NULL ? sk_SCT_num(scts) : 0;
4619 for (i = 0; i < count; ++i) {
4620 SCT *sct = sk_SCT_value(scts, i);
4621 int status = SCT_get_validation_status(sct);
4623 if (status == SCT_VALIDATION_STATUS_VALID)
4626 SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS);
4630 int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
4634 * Since code exists that uses the custom extension handler for CT, look
4635 * for this and throw an error if they have already registered to use CT.
4637 if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
4638 TLSEXT_TYPE_signed_certificate_timestamp))
4640 SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK,
4641 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4645 if (callback != NULL) {
4647 * If we are validating CT, then we MUST accept SCTs served via OCSP
4649 if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
4653 s->ct_validation_callback = callback;
4654 s->ct_validation_callback_arg = arg;
4659 int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
4660 ssl_ct_validation_cb callback, void *arg)
4663 * Since code exists that uses the custom extension handler for CT, look for
4664 * this and throw an error if they have already registered to use CT.
4666 if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
4667 TLSEXT_TYPE_signed_certificate_timestamp))
4669 SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK,
4670 SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
4674 ctx->ct_validation_callback = callback;
4675 ctx->ct_validation_callback_arg = arg;
4679 int SSL_ct_is_enabled(const SSL *s)
4681 return s->ct_validation_callback != NULL;
4684 int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
4686 return ctx->ct_validation_callback != NULL;
4689 int ssl_validate_ct(SSL *s)
4692 X509 *cert = s->session != NULL ? s->session->peer : NULL;
4694 SSL_DANE *dane = &s->dane;
4695 CT_POLICY_EVAL_CTX *ctx = NULL;
4696 const STACK_OF(SCT) *scts;
4699 * If no callback is set, the peer is anonymous, or its chain is invalid,
4700 * skip SCT validation - just return success. Applications that continue
4701 * handshakes without certificates, with unverified chains, or pinned leaf
4702 * certificates are outside the scope of the WebPKI and CT.
4704 * The above exclusions notwithstanding the vast majority of peers will
4705 * have rather ordinary certificate chains validated by typical
4706 * applications that perform certificate verification and therefore will
4707 * process SCTs when enabled.
4709 if (s->ct_validation_callback == NULL || cert == NULL ||
4710 s->verify_result != X509_V_OK ||
4711 s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
4715 * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
4716 * trust-anchors. See https://tools.ietf.org/html/rfc7671#section-4.2
4718 if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
4719 switch (dane->mtlsa->usage) {
4720 case DANETLS_USAGE_DANE_TA:
4721 case DANETLS_USAGE_DANE_EE:
4726 ctx = CT_POLICY_EVAL_CTX_new();
4728 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_VALIDATE_CT,
4729 ERR_R_MALLOC_FAILURE);
4733 issuer = sk_X509_value(s->verified_chain, 1);
4734 CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
4735 CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
4736 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store);
4737 CT_POLICY_EVAL_CTX_set_time(
4738 ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000);
4740 scts = SSL_get0_peer_scts(s);
4743 * This function returns success (> 0) only when all the SCTs are valid, 0
4744 * when some are invalid, and < 0 on various internal errors (out of
4745 * memory, etc.). Having some, or even all, invalid SCTs is not sufficient
4746 * reason to abort the handshake, that decision is up to the callback.
4747 * Therefore, we error out only in the unexpected case that the return
4748 * value is negative.
4750 * XXX: One might well argue that the return value of this function is an
4751 * unfortunate design choice. Its job is only to determine the validation
4752 * status of each of the provided SCTs. So long as it correctly separates
4753 * the wheat from the chaff it should return success. Failure in this case
4754 * ought to correspond to an inability to carry out its duties.
4756 if (SCT_LIST_validate(scts, ctx) < 0) {
4757 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
4758 SSL_R_SCT_VERIFICATION_FAILED);
4762 ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
4764 ret = 0; /* This function returns 0 on failure */
4766 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
4767 SSL_R_CALLBACK_FAILED);
4770 CT_POLICY_EVAL_CTX_free(ctx);
4772 * With SSL_VERIFY_NONE the session may be cached and re-used despite a
4773 * failure return code here. Also the application may wish the complete
4774 * the handshake, and then disconnect cleanly at a higher layer, after
4775 * checking the verification status of the completed connection.
4777 * We therefore force a certificate verification failure which will be
4778 * visible via SSL_get_verify_result() and cached as part of any resumed
4781 * Note: the permissive callback is for information gathering only, always
4782 * returns success, and does not affect verification status. Only the
4783 * strict callback or a custom application-specified callback can trigger
4784 * connection failure or record a verification error.
4787 s->verify_result = X509_V_ERR_NO_VALID_SCTS;
4791 int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
4793 switch (validation_mode) {
4795 SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
4797 case SSL_CT_VALIDATION_PERMISSIVE:
4798 return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
4799 case SSL_CT_VALIDATION_STRICT:
4800 return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
4804 int SSL_enable_ct(SSL *s, int validation_mode)
4806 switch (validation_mode) {
4808 SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
4810 case SSL_CT_VALIDATION_PERMISSIVE:
4811 return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
4812 case SSL_CT_VALIDATION_STRICT:
4813 return SSL_set_ct_validation_callback(s, ct_strict, NULL);
4817 int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
4819 return CTLOG_STORE_load_default_file(ctx->ctlog_store);
4822 int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
4824 return CTLOG_STORE_load_file(ctx->ctlog_store, path);
4827 void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
4829 CTLOG_STORE_free(ctx->ctlog_store);
4830 ctx->ctlog_store = logs;
4833 const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
4835 return ctx->ctlog_store;
4838 #endif /* OPENSSL_NO_CT */
4840 void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb,
4843 c->client_hello_cb = cb;
4844 c->client_hello_cb_arg = arg;
4847 int SSL_client_hello_isv2(SSL *s)
4849 if (s->clienthello == NULL)
4851 return s->clienthello->isv2;
4854 unsigned int SSL_client_hello_get0_legacy_version(SSL *s)
4856 if (s->clienthello == NULL)
4858 return s->clienthello->legacy_version;
4861 size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out)
4863 if (s->clienthello == NULL)
4866 *out = s->clienthello->random;
4867 return SSL3_RANDOM_SIZE;
4870 size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out)
4872 if (s->clienthello == NULL)
4875 *out = s->clienthello->session_id;
4876 return s->clienthello->session_id_len;
4879 size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out)
4881 if (s->clienthello == NULL)
4884 *out = PACKET_data(&s->clienthello->ciphersuites);
4885 return PACKET_remaining(&s->clienthello->ciphersuites);
4888 size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out)
4890 if (s->clienthello == NULL)
4893 *out = s->clienthello->compressions;
4894 return s->clienthello->compressions_len;
4897 int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen)
4903 if (s->clienthello == NULL || out == NULL || outlen == NULL)
4905 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
4906 ext = s->clienthello->pre_proc_exts + i;
4910 present = OPENSSL_malloc(sizeof(*present) * num);
4911 if (present == NULL)
4913 for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
4914 ext = s->clienthello->pre_proc_exts + i;
4916 if (ext->received_order >= num)
4918 present[ext->received_order] = ext->type;
4925 OPENSSL_free(present);
4929 int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
4935 if (s->clienthello == NULL)
4937 for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) {
4938 r = s->clienthello->pre_proc_exts + i;
4939 if (r->present && r->type == type) {
4941 *out = PACKET_data(&r->data);
4943 *outlen = PACKET_remaining(&r->data);
4950 int SSL_free_buffers(SSL *ssl)
4952 RECORD_LAYER *rl = &ssl->rlayer;
4954 if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl))
4957 RECORD_LAYER_release(rl);
4961 int SSL_alloc_buffers(SSL *ssl)
4963 return ssl3_setup_buffers(ssl);
4966 void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
4968 ctx->keylog_callback = cb;
4971 SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
4973 return ctx->keylog_callback;
4976 static int nss_keylog_int(const char *prefix,
4978 const uint8_t *parameter_1,
4979 size_t parameter_1_len,
4980 const uint8_t *parameter_2,
4981 size_t parameter_2_len)
4984 char *cursor = NULL;
4989 if (ssl->ctx->keylog_callback == NULL) return 1;
4992 * Our output buffer will contain the following strings, rendered with
4993 * space characters in between, terminated by a NULL character: first the
4994 * prefix, then the first parameter, then the second parameter. The
4995 * meaning of each parameter depends on the specific key material being
4996 * logged. Note that the first and second parameters are encoded in
4997 * hexadecimal, so we need a buffer that is twice their lengths.
4999 prefix_len = strlen(prefix);
5000 out_len = prefix_len + (2*parameter_1_len) + (2*parameter_2_len) + 3;
5001 if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
5002 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, SSL_F_NSS_KEYLOG_INT,
5003 ERR_R_MALLOC_FAILURE);
5007 strcpy(cursor, prefix);
5008 cursor += prefix_len;
5011 for (i = 0; i < parameter_1_len; i++) {
5012 sprintf(cursor, "%02x", parameter_1[i]);
5017 for (i = 0; i < parameter_2_len; i++) {
5018 sprintf(cursor, "%02x", parameter_2[i]);
5023 ssl->ctx->keylog_callback(ssl, (const char *)out);
5029 int ssl_log_rsa_client_key_exchange(SSL *ssl,
5030 const uint8_t *encrypted_premaster,
5031 size_t encrypted_premaster_len,
5032 const uint8_t *premaster,
5033 size_t premaster_len)
5035 if (encrypted_premaster_len < 8) {
5036 SSLfatal(ssl, SSL_AD_INTERNAL_ERROR,
5037 SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
5041 /* We only want the first 8 bytes of the encrypted premaster as a tag. */
5042 return nss_keylog_int("RSA",
5044 encrypted_premaster,
5050 int ssl_log_secret(SSL *ssl,
5052 const uint8_t *secret,
5055 return nss_keylog_int(label,
5057 ssl->s3->client_random,
5063 #define SSLV2_CIPHER_LEN 3
5065 int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format)
5069 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5071 if (PACKET_remaining(cipher_suites) == 0) {
5072 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_CACHE_CIPHERLIST,
5073 SSL_R_NO_CIPHERS_SPECIFIED);
5077 if (PACKET_remaining(cipher_suites) % n != 0) {
5078 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5079 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5083 OPENSSL_free(s->s3->tmp.ciphers_raw);
5084 s->s3->tmp.ciphers_raw = NULL;
5085 s->s3->tmp.ciphers_rawlen = 0;
5088 size_t numciphers = PACKET_remaining(cipher_suites) / n;
5089 PACKET sslv2ciphers = *cipher_suites;
5090 unsigned int leadbyte;
5094 * We store the raw ciphers list in SSLv3+ format so we need to do some
5095 * preprocessing to convert the list first. If there are any SSLv2 only
5096 * ciphersuites with a non-zero leading byte then we are going to
5097 * slightly over allocate because we won't store those. But that isn't a
5100 raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
5101 s->s3->tmp.ciphers_raw = raw;
5103 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5104 ERR_R_MALLOC_FAILURE);
5107 for (s->s3->tmp.ciphers_rawlen = 0;
5108 PACKET_remaining(&sslv2ciphers) > 0;
5109 raw += TLS_CIPHER_LEN) {
5110 if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
5112 && !PACKET_copy_bytes(&sslv2ciphers, raw,
5115 && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
5116 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5118 OPENSSL_free(s->s3->tmp.ciphers_raw);
5119 s->s3->tmp.ciphers_raw = NULL;
5120 s->s3->tmp.ciphers_rawlen = 0;
5124 s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN;
5126 } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
5127 &s->s3->tmp.ciphers_rawlen)) {
5128 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
5129 ERR_R_INTERNAL_ERROR);
5135 int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
5136 int isv2format, STACK_OF(SSL_CIPHER) **sk,
5137 STACK_OF(SSL_CIPHER) **scsvs)
5141 if (!PACKET_buf_init(&pkt, bytes, len))
5143 return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0);
5146 int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
5147 STACK_OF(SSL_CIPHER) **skp,
5148 STACK_OF(SSL_CIPHER) **scsvs_out,
5149 int sslv2format, int fatal)
5151 const SSL_CIPHER *c;
5152 STACK_OF(SSL_CIPHER) *sk = NULL;
5153 STACK_OF(SSL_CIPHER) *scsvs = NULL;
5155 /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
5156 unsigned char cipher[SSLV2_CIPHER_LEN];
5158 n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
5160 if (PACKET_remaining(cipher_suites) == 0) {
5162 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_BYTES_TO_CIPHER_LIST,
5163 SSL_R_NO_CIPHERS_SPECIFIED);
5165 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
5169 if (PACKET_remaining(cipher_suites) % n != 0) {
5171 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5172 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5174 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST,
5175 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
5179 sk = sk_SSL_CIPHER_new_null();
5180 scsvs = sk_SSL_CIPHER_new_null();
5181 if (sk == NULL || scsvs == NULL) {
5183 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5184 ERR_R_MALLOC_FAILURE);
5186 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5190 while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
5192 * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
5193 * first byte set to zero, while true SSLv2 ciphers have a non-zero
5194 * first byte. We don't support any true SSLv2 ciphers, so skip them.
5196 if (sslv2format && cipher[0] != '\0')
5199 /* For SSLv2-compat, ignore leading 0-byte. */
5200 c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
5202 if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
5203 (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
5205 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
5206 SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5208 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
5213 if (PACKET_remaining(cipher_suites) > 0) {
5215 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
5218 SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH);
5225 sk_SSL_CIPHER_free(sk);
5226 if (scsvs_out != NULL)
5229 sk_SSL_CIPHER_free(scsvs);
5232 sk_SSL_CIPHER_free(sk);
5233 sk_SSL_CIPHER_free(scsvs);
5237 int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
5239 ctx->max_early_data = max_early_data;
5244 uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
5246 return ctx->max_early_data;
5249 int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
5251 s->max_early_data = max_early_data;
5256 uint32_t SSL_get_max_early_data(const SSL *s)
5258 return s->max_early_data;
5261 int ssl_randbytes(SSL *s, unsigned char *rnd, size_t size)
5263 if (s->drbg != NULL) {
5265 * Currently, it's the duty of the caller to serialize the generate
5266 * requests to the DRBG. So formally we have to check whether
5267 * s->drbg->lock != NULL and take the lock if this is the case.
5268 * However, this DRBG is unique to a given SSL object, and we already
5269 * require that SSL objects are only accessed by a single thread at
5270 * a given time. Also, SSL DRBGs have no child DRBG, so there is
5271 * no risk that this DRBG is accessed by a child DRBG in parallel
5272 * for reseeding. As such, we can rely on the application's
5273 * serialization of SSL accesses for the needed concurrency protection
5276 return RAND_DRBG_bytes(s->drbg, rnd, size);
5280 return RAND_bytes(rnd, size);
5283 __owur unsigned int ssl_get_max_send_fragment(const SSL *ssl)
5285 /* Return any active Max Fragment Len extension */
5286 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session))
5287 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5289 /* return current SSL connection setting */
5290 return ssl->max_send_fragment;
5293 __owur unsigned int ssl_get_split_send_fragment(const SSL *ssl)
5295 /* Return a value regarding an active Max Fragment Len extension */
5296 if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)
5297 && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session))
5298 return GET_MAX_FRAGMENT_LENGTH(ssl->session);
5300 /* else limit |split_send_fragment| to current |max_send_fragment| */
5301 if (ssl->split_send_fragment > ssl->max_send_fragment)
5302 return ssl->max_send_fragment;
5304 /* return current SSL connection setting */
5305 return ssl->split_send_fragment;
5308 int SSL_stateless(SSL *s)
5312 /* Ensure there is no state left over from a previous invocation */
5318 s->s3->flags |= TLS1_FLAGS_STATELESS;
5319 ret = SSL_accept(s);
5320 s->s3->flags &= ~TLS1_FLAGS_STATELESS;
5322 if (ret > 0 && s->ext.cookieok)
5328 void SSL_force_post_handshake_auth(SSL *ssl)
5330 ssl->pha_forced = 1;
5333 int SSL_verify_client_post_handshake(SSL *ssl)
5335 if (!SSL_IS_TLS13(ssl)) {
5336 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_WRONG_SSL_VERSION);
5340 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_NOT_SERVER);
5344 if (!SSL_is_init_finished(ssl)) {
5345 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_STILL_IN_INIT);
5349 switch (ssl->post_handshake_auth) {
5351 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_EXTENSION_NOT_RECEIVED);
5354 case SSL_PHA_EXT_SENT:
5355 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, ERR_R_INTERNAL_ERROR);
5357 case SSL_PHA_EXT_RECEIVED:
5359 case SSL_PHA_REQUEST_PENDING:
5360 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_PENDING);
5362 case SSL_PHA_REQUESTED:
5363 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_SENT);
5367 ssl->post_handshake_auth = SSL_PHA_REQUEST_PENDING;
5369 /* checks verify_mode and algorithm_auth */
5370 if (!send_certificate_request(ssl)) {
5371 ssl->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */
5372 SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_INVALID_CONFIG);
5376 ossl_statem_set_in_init(ssl, 1);