2 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
5 * Licensed under the OpenSSL license (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
14 #ifndef NO_SYS_TYPES_H
15 # include <sys/types.h>
18 #include "internal/o_dir.h"
19 #include <openssl/lhash.h>
20 #include <openssl/bio.h>
21 #include <openssl/pem.h>
22 #include <openssl/x509v3.h>
23 #include <openssl/dh.h>
24 #include <openssl/bn.h>
25 #include <openssl/crypto.h>
27 #include "internal/thread_once.h"
29 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
30 int op, int bits, int nid, void *other,
33 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
34 static volatile int ssl_x509_store_ctx_idx = -1;
36 DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)
38 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0,
39 "SSL for verify callback",
41 return ssl_x509_store_ctx_idx >= 0;
44 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
47 if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init))
49 return ssl_x509_store_ctx_idx;
52 CERT *ssl_cert_new(void)
54 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
57 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
61 ret->key = &(ret->pkeys[SSL_PKEY_RSA]);
63 ret->sec_cb = ssl_security_default_callback;
64 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
66 ret->lock = CRYPTO_THREAD_lock_new();
67 if (ret->lock == NULL) {
68 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
76 CERT *ssl_cert_dup(CERT *cert)
78 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
82 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
87 ret->key = &ret->pkeys[cert->key - cert->pkeys];
88 ret->lock = CRYPTO_THREAD_lock_new();
89 if (ret->lock == NULL) {
90 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
95 if (cert->dh_tmp != NULL) {
96 ret->dh_tmp = cert->dh_tmp;
97 EVP_PKEY_up_ref(ret->dh_tmp);
99 ret->dh_tmp_cb = cert->dh_tmp_cb;
100 ret->dh_tmp_auto = cert->dh_tmp_auto;
103 for (i = 0; i < SSL_PKEY_NUM; i++) {
104 CERT_PKEY *cpk = cert->pkeys + i;
105 CERT_PKEY *rpk = ret->pkeys + i;
106 if (cpk->x509 != NULL) {
107 rpk->x509 = cpk->x509;
108 X509_up_ref(rpk->x509);
111 if (cpk->privatekey != NULL) {
112 rpk->privatekey = cpk->privatekey;
113 EVP_PKEY_up_ref(cpk->privatekey);
117 rpk->chain = X509_chain_up_ref(cpk->chain);
119 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
123 if (cert->pkeys[i].serverinfo != NULL) {
124 /* Just copy everything. */
125 ret->pkeys[i].serverinfo =
126 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
127 if (ret->pkeys[i].serverinfo == NULL) {
128 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
131 ret->pkeys[i].serverinfo_length = cert->pkeys[i].serverinfo_length;
132 memcpy(ret->pkeys[i].serverinfo,
133 cert->pkeys[i].serverinfo, cert->pkeys[i].serverinfo_length);
137 /* Configured sigalgs copied across */
138 if (cert->conf_sigalgs) {
139 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
140 * sizeof(*cert->conf_sigalgs));
141 if (ret->conf_sigalgs == NULL)
143 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
144 cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs));
145 ret->conf_sigalgslen = cert->conf_sigalgslen;
147 ret->conf_sigalgs = NULL;
149 if (cert->client_sigalgs) {
150 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen
151 * sizeof(*cert->client_sigalgs));
152 if (ret->client_sigalgs == NULL)
154 memcpy(ret->client_sigalgs, cert->client_sigalgs,
155 cert->client_sigalgslen * sizeof(*cert->client_sigalgs));
156 ret->client_sigalgslen = cert->client_sigalgslen;
158 ret->client_sigalgs = NULL;
159 /* Shared sigalgs also NULL */
160 ret->shared_sigalgs = NULL;
161 /* Copy any custom client certificate types */
163 ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len);
164 if (ret->ctype == NULL)
166 ret->ctype_len = cert->ctype_len;
169 ret->cert_flags = cert->cert_flags;
171 ret->cert_cb = cert->cert_cb;
172 ret->cert_cb_arg = cert->cert_cb_arg;
174 if (cert->verify_store) {
175 X509_STORE_up_ref(cert->verify_store);
176 ret->verify_store = cert->verify_store;
179 if (cert->chain_store) {
180 X509_STORE_up_ref(cert->chain_store);
181 ret->chain_store = cert->chain_store;
184 ret->sec_cb = cert->sec_cb;
185 ret->sec_level = cert->sec_level;
186 ret->sec_ex = cert->sec_ex;
188 if (!custom_exts_copy(&ret->custext, &cert->custext))
190 #ifndef OPENSSL_NO_PSK
191 if (cert->psk_identity_hint) {
192 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint);
193 if (ret->psk_identity_hint == NULL)
205 /* Free up and clear all certificates and chains */
207 void ssl_cert_clear_certs(CERT *c)
212 for (i = 0; i < SSL_PKEY_NUM; i++) {
213 CERT_PKEY *cpk = c->pkeys + i;
214 X509_free(cpk->x509);
216 EVP_PKEY_free(cpk->privatekey);
217 cpk->privatekey = NULL;
218 sk_X509_pop_free(cpk->chain, X509_free);
220 OPENSSL_free(cpk->serverinfo);
221 cpk->serverinfo = NULL;
222 cpk->serverinfo_length = 0;
226 void ssl_cert_free(CERT *c)
233 CRYPTO_DOWN_REF(&c->references, &i, c->lock);
234 REF_PRINT_COUNT("CERT", c);
237 REF_ASSERT_ISNT(i < 0);
239 #ifndef OPENSSL_NO_DH
240 EVP_PKEY_free(c->dh_tmp);
243 ssl_cert_clear_certs(c);
244 OPENSSL_free(c->conf_sigalgs);
245 OPENSSL_free(c->client_sigalgs);
246 OPENSSL_free(c->shared_sigalgs);
247 OPENSSL_free(c->ctype);
248 X509_STORE_free(c->verify_store);
249 X509_STORE_free(c->chain_store);
250 custom_exts_free(&c->custext);
251 #ifndef OPENSSL_NO_PSK
252 OPENSSL_free(c->psk_identity_hint);
254 CRYPTO_THREAD_lock_free(c->lock);
258 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
261 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
264 for (i = 0; i < sk_X509_num(chain); i++) {
265 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
267 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
271 sk_X509_pop_free(cpk->chain, X509_free);
276 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
278 STACK_OF(X509) *dchain;
280 return ssl_cert_set0_chain(s, ctx, NULL);
281 dchain = X509_chain_up_ref(chain);
284 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
285 sk_X509_pop_free(dchain, X509_free);
291 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
294 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
297 r = ssl_security_cert(s, ctx, x, 0, 0);
299 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
303 cpk->chain = sk_X509_new_null();
304 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
309 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
311 if (!ssl_cert_add0_chain_cert(s, ctx, x))
317 int ssl_cert_select_current(CERT *c, X509 *x)
322 for (i = 0; i < SSL_PKEY_NUM; i++) {
323 CERT_PKEY *cpk = c->pkeys + i;
324 if (cpk->x509 == x && cpk->privatekey) {
330 for (i = 0; i < SSL_PKEY_NUM; i++) {
331 CERT_PKEY *cpk = c->pkeys + i;
332 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
340 int ssl_cert_set_current(CERT *c, long op)
345 if (op == SSL_CERT_SET_FIRST)
347 else if (op == SSL_CERT_SET_NEXT) {
348 idx = (int)(c->key - c->pkeys + 1);
349 if (idx >= SSL_PKEY_NUM)
353 for (i = idx; i < SSL_PKEY_NUM; i++) {
354 CERT_PKEY *cpk = c->pkeys + i;
355 if (cpk->x509 && cpk->privatekey) {
363 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
366 c->cert_cb_arg = arg;
369 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
373 X509_STORE *verify_store;
374 X509_STORE_CTX *ctx = NULL;
375 X509_VERIFY_PARAM *param;
377 if ((sk == NULL) || (sk_X509_num(sk) == 0))
380 if (s->cert->verify_store)
381 verify_store = s->cert->verify_store;
383 verify_store = s->ctx->cert_store;
385 ctx = X509_STORE_CTX_new();
387 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
391 x = sk_X509_value(sk, 0);
392 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
393 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
396 param = X509_STORE_CTX_get0_param(ctx);
398 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
399 * point, for now a single @SECLEVEL sets the same policy for TLS crypto
400 * and PKI authentication.
402 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s));
404 /* Set suite B flags if needed */
405 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
406 if (!X509_STORE_CTX_set_ex_data
407 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
411 /* Verify via DANE if enabled */
412 if (DANETLS_ENABLED(&s->dane))
413 X509_STORE_CTX_set0_dane(ctx, &s->dane);
416 * We need to inherit the verify parameters. These can be determined by
417 * the context: if its a server it will verify SSL client certificates or
421 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
423 * Anything non-default in "s->param" should overwrite anything in the ctx.
425 X509_VERIFY_PARAM_set1(param, s->param);
427 if (s->verify_callback)
428 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
430 if (s->ctx->app_verify_callback != NULL)
431 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
433 i = X509_verify_cert(ctx);
435 s->verify_result = X509_STORE_CTX_get_error(ctx);
436 sk_X509_pop_free(s->verified_chain, X509_free);
437 s->verified_chain = NULL;
438 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
439 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
440 if (s->verified_chain == NULL) {
441 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
446 /* Move peername from the store context params to the SSL handle's */
447 X509_VERIFY_PARAM_move_peername(s->param, param);
450 X509_STORE_CTX_free(ctx);
454 static void set0_CA_list(STACK_OF(X509_NAME) **ca_list,
455 STACK_OF(X509_NAME) *name_list)
457 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
458 *ca_list = name_list;
461 STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
464 STACK_OF(X509_NAME) *ret;
467 ret = sk_X509_NAME_new_null();
469 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
472 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
473 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
474 if (name == NULL || !sk_X509_NAME_push(ret, name)) {
475 sk_X509_NAME_pop_free(ret, X509_NAME_free);
476 X509_NAME_free(name);
483 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
485 set0_CA_list(&s->ca_names, name_list);
488 void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
490 set0_CA_list(&ctx->ca_names, name_list);
493 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx)
495 return ctx->ca_names;
498 const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s)
500 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names;
503 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
505 SSL_CTX_set0_CA_list(ctx, name_list);
508 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
510 return ctx->ca_names;
513 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
515 SSL_set0_CA_list(s, name_list);
518 const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s)
520 return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL;
523 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
526 return s->s3 != NULL ? s->s3->tmp.peer_ca_names : NULL;
527 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names;
530 static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x)
536 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL))
539 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
542 if (!sk_X509_NAME_push(*sk, name)) {
543 X509_NAME_free(name);
549 int SSL_add1_CA_list(SSL *ssl, const X509 *x)
551 return add_ca_name(&ssl->ca_names, x);
554 int SSL_CTX_add1_CA_list(SSL_CTX *ctx, const X509 *x)
556 return add_ca_name(&ctx->ca_names, x);
559 int SSL_add_client_CA(SSL *ssl, X509 *x)
561 return add_ca_name(&ssl->ca_names, x);
564 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
566 return add_ca_name(&ctx->ca_names, x);
569 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
571 return (X509_NAME_cmp(*a, *b));
574 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
576 return X509_NAME_cmp(a, b);
579 static unsigned long xname_hash(const X509_NAME *a)
581 return X509_NAME_hash((X509_NAME *)a);
585 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
586 * it doesn't really have anything to do with clients (except that a common use
587 * for a stack of CAs is to send it to the client). Actually, it doesn't have
588 * much to do with CAs, either, since it will load any old cert.
589 * \param file the file containing one or more certs.
590 * \return a ::STACK containing the certs.
592 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
594 BIO *in = BIO_new(BIO_s_file());
596 X509_NAME *xn = NULL;
597 STACK_OF(X509_NAME) *ret = NULL;
598 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp);
600 if ((name_hash == NULL) || (in == NULL)) {
601 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
605 if (!BIO_read_filename(in, file))
609 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
612 ret = sk_X509_NAME_new_null();
614 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
618 if ((xn = X509_get_subject_name(x)) == NULL)
620 /* check for duplicates */
621 xn = X509_NAME_dup(xn);
624 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
629 lh_X509_NAME_insert(name_hash, xn);
630 if (!sk_X509_NAME_push(ret, xn))
638 sk_X509_NAME_pop_free(ret, X509_NAME_free);
643 lh_X509_NAME_free(name_hash);
650 * Add a file of certs to a stack.
651 * \param stack the stack to add to.
652 * \param file the file to add from. All certs in this file that are not
653 * already in the stack will be added.
654 * \return 1 for success, 0 for failure. Note that in the case of failure some
655 * certs may have been added to \c stack.
658 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
663 X509_NAME *xn = NULL;
665 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
667 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
669 in = BIO_new(BIO_s_file());
672 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE);
676 if (!BIO_read_filename(in, file))
680 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
682 if ((xn = X509_get_subject_name(x)) == NULL)
684 xn = X509_NAME_dup(xn);
687 if (sk_X509_NAME_find(stack, xn) >= 0) {
690 } else if (!sk_X509_NAME_push(stack, xn)) {
704 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
709 * Add a directory of certs to a stack.
710 * \param stack the stack to append to.
711 * \param dir the directory to append from. All files in this directory will be
712 * examined as potential certs. Any that are acceptable to
713 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
715 * \return 1 for success, 0 for failure. Note that in the case of failure some
716 * certs may have been added to \c stack.
719 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
722 OPENSSL_DIR_CTX *d = NULL;
723 const char *filename;
726 /* Note that a side effect is that the CAs will be sorted by name */
728 while ((filename = OPENSSL_DIR_read(&d, dir))) {
732 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
733 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
734 SSL_R_PATH_TOO_LONG);
737 #ifdef OPENSSL_SYS_VMS
738 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
740 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
742 if (r <= 0 || r >= (int)sizeof(buf))
744 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
749 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
750 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
751 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
764 /* Build a certificate chain for current certificate */
765 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
767 CERT *c = s ? s->cert : ctx->cert;
768 CERT_PKEY *cpk = c->key;
769 X509_STORE *chain_store = NULL;
770 X509_STORE_CTX *xs_ctx = NULL;
771 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
776 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
779 /* Rearranging and check the chain: add everything to a store */
780 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
781 chain_store = X509_STORE_new();
782 if (chain_store == NULL)
784 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
785 x = sk_X509_value(cpk->chain, i);
786 if (!X509_STORE_add_cert(chain_store, x))
789 /* Add EE cert too: it might be self signed */
790 if (!X509_STORE_add_cert(chain_store, cpk->x509))
794 chain_store = c->chain_store;
796 chain_store = s->ctx->cert_store;
798 chain_store = ctx->cert_store;
800 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
801 untrusted = cpk->chain;
804 xs_ctx = X509_STORE_CTX_new();
805 if (xs_ctx == NULL) {
806 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
809 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
810 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
813 /* Set suite B flags if needed */
814 X509_STORE_CTX_set_flags(xs_ctx,
815 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
817 i = X509_verify_cert(xs_ctx);
818 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
819 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
825 chain = X509_STORE_CTX_get1_chain(xs_ctx);
827 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
828 i = X509_STORE_CTX_get_error(xs_ctx);
829 ERR_add_error_data(2, "Verify error:",
830 X509_verify_cert_error_string(i));
834 /* Remove EE certificate from chain */
835 x = sk_X509_shift(chain);
837 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
838 if (sk_X509_num(chain) > 0) {
839 /* See if last cert is self signed */
840 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
841 if (X509_get_extension_flags(x) & EXFLAG_SS) {
842 x = sk_X509_pop(chain);
848 * Check security level of all CA certificates: EE will have been checked
851 for (i = 0; i < sk_X509_num(chain); i++) {
852 x = sk_X509_value(chain, i);
853 rv = ssl_security_cert(s, ctx, x, 0, 0);
855 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
856 sk_X509_pop_free(chain, X509_free);
861 sk_X509_pop_free(cpk->chain, X509_free);
866 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
867 X509_STORE_free(chain_store);
868 X509_STORE_CTX_free(xs_ctx);
873 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
877 pstore = &c->chain_store;
879 pstore = &c->verify_store;
880 X509_STORE_free(*pstore);
883 X509_STORE_up_ref(store);
887 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
888 int op, int bits, int nid, void *other,
892 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
894 level = SSL_CTX_get_security_level(ctx);
896 level = SSL_get_security_level(s);
900 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
903 if (op == SSL_SECOP_TMP_DH && bits < 80)
909 minbits = minbits_table[level - 1];
911 case SSL_SECOP_CIPHER_SUPPORTED:
912 case SSL_SECOP_CIPHER_SHARED:
913 case SSL_SECOP_CIPHER_CHECK:
915 const SSL_CIPHER *c = other;
916 /* No ciphers below security level */
919 /* No unauthenticated ciphersuites */
920 if (c->algorithm_auth & SSL_aNULL)
922 /* No MD5 mac ciphersuites */
923 if (c->algorithm_mac & SSL_MD5)
925 /* SHA1 HMAC is 160 bits of security */
926 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
928 /* Level 2: no RC4 */
929 if (level >= 2 && c->algorithm_enc == SSL_RC4)
931 /* Level 3: forward secure ciphersuites only */
932 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
936 case SSL_SECOP_VERSION:
937 if (!SSL_IS_DTLS(s)) {
938 /* SSLv3 not allowed at level 2 */
939 if (nid <= SSL3_VERSION && level >= 2)
941 /* TLS v1.1 and above only for level 3 */
942 if (nid <= TLS1_VERSION && level >= 3)
944 /* TLS v1.2 only for level 4 and above */
945 if (nid <= TLS1_1_VERSION && level >= 4)
948 /* DTLS v1.2 only for level 4 and above */
949 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
954 case SSL_SECOP_COMPRESSION:
958 case SSL_SECOP_TICKET:
969 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
971 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
974 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
976 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,