2 * ! \file ssl/ssl_cert.c
4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
7 * This package is an SSL implementation written
8 * by Eric Young (eay@cryptsoft.com).
9 * The implementation was written so as to conform with Netscapes SSL.
11 * This library is free for commercial and non-commercial use as long as
12 * the following conditions are aheared to. The following conditions
13 * apply to all code found in this distribution, be it the RC4, RSA,
14 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
15 * included with this distribution is covered by the same copyright terms
16 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
18 * Copyright remains Eric Young's, and as such any Copyright notices in
19 * the code are not to be removed.
20 * If this package is used in a product, Eric Young should be given attribution
21 * as the author of the parts of the library used.
22 * This can be in the form of a textual message at program startup or
23 * in documentation (online or textual) provided with the package.
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
28 * 1. Redistributions of source code must retain the copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. All advertising materials mentioning features or use of this software
34 * must display the following acknowledgement:
35 * "This product includes cryptographic software written by
36 * Eric Young (eay@cryptsoft.com)"
37 * The word 'cryptographic' can be left out if the rouines from the library
38 * being used are not cryptographic related :-).
39 * 4. If you include any Windows specific code (or a derivative thereof) from
40 * the apps directory (application code) you must include an acknowledgement:
41 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
43 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * The licence and distribution terms for any publically available version or
56 * derivative of this code cannot be changed. i.e. this code cannot simply be
57 * copied and put under another distribution licence
58 * [including the GNU Public Licence.]
60 /* ====================================================================
61 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
63 * Redistribution and use in source and binary forms, with or without
64 * modification, are permitted provided that the following conditions
67 * 1. Redistributions of source code must retain the above copyright
68 * notice, this list of conditions and the following disclaimer.
70 * 2. Redistributions in binary form must reproduce the above copyright
71 * notice, this list of conditions and the following disclaimer in
72 * the documentation and/or other materials provided with the
75 * 3. All advertising materials mentioning features or use of this
76 * software must display the following acknowledgment:
77 * "This product includes software developed by the OpenSSL Project
78 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
80 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
81 * endorse or promote products derived from this software without
82 * prior written permission. For written permission, please contact
83 * openssl-core@openssl.org.
85 * 5. Products derived from this software may not be called "OpenSSL"
86 * nor may "OpenSSL" appear in their names without prior written
87 * permission of the OpenSSL Project.
89 * 6. Redistributions of any form whatsoever must retain the following
91 * "This product includes software developed by the OpenSSL Project
92 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
94 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
95 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
97 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
98 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
99 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
100 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
101 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
102 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
103 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
104 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
105 * OF THE POSSIBILITY OF SUCH DAMAGE.
106 * ====================================================================
108 * This product includes cryptographic software written by Eric Young
109 * (eay@cryptsoft.com). This product includes software written by Tim
110 * Hudson (tjh@cryptsoft.com).
113 /* ====================================================================
114 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
115 * ECC cipher suite support in OpenSSL originally developed by
116 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
122 #ifndef NO_SYS_TYPES_H
123 # include <sys/types.h>
127 #include <openssl/objects.h>
128 #include <openssl/bio.h>
129 #include <openssl/pem.h>
130 #include <openssl/x509v3.h>
131 #ifndef OPENSSL_NO_DH
132 # include <openssl/dh.h>
134 #include <openssl/bn.h>
135 #include "ssl_locl.h"
137 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
139 static volatile int ssl_x509_store_ctx_idx = -1;
140 int got_write_lock = 0;
142 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
144 if (ssl_x509_store_ctx_idx < 0) {
145 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
146 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
149 if (ssl_x509_store_ctx_idx < 0) {
150 ssl_x509_store_ctx_idx =
151 X509_STORE_CTX_get_ex_new_index(0, "SSL for verify callback",
157 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
159 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
161 return ssl_x509_store_ctx_idx;
164 static void ssl_cert_set_default_md(CERT *cert)
166 /* Set digest values to defaults */
167 #ifndef OPENSSL_NO_DSA
168 cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
170 #ifndef OPENSSL_NO_RSA
171 cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
172 cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
174 #ifndef OPENSSL_NO_ECDSA
175 cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
179 CERT *ssl_cert_new(void)
183 ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
185 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
188 memset(ret, 0, sizeof(CERT));
190 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
192 ssl_cert_set_default_md(ret);
196 CERT *ssl_cert_dup(CERT *cert)
201 ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
203 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
207 memset(ret, 0, sizeof(CERT));
209 ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
211 * or ret->key = ret->pkeys + (cert->key - cert->pkeys), if you find that
215 ret->valid = cert->valid;
216 ret->mask_k = cert->mask_k;
217 ret->mask_a = cert->mask_a;
218 ret->export_mask_k = cert->export_mask_k;
219 ret->export_mask_a = cert->export_mask_a;
221 #ifndef OPENSSL_NO_RSA
222 if (cert->rsa_tmp != NULL) {
223 RSA_up_ref(cert->rsa_tmp);
224 ret->rsa_tmp = cert->rsa_tmp;
226 ret->rsa_tmp_cb = cert->rsa_tmp_cb;
229 #ifndef OPENSSL_NO_DH
230 if (cert->dh_tmp != NULL) {
231 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
232 if (ret->dh_tmp == NULL) {
233 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
236 if (cert->dh_tmp->priv_key) {
237 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
239 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
242 ret->dh_tmp->priv_key = b;
244 if (cert->dh_tmp->pub_key) {
245 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
247 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
250 ret->dh_tmp->pub_key = b;
253 ret->dh_tmp_cb = cert->dh_tmp_cb;
256 #ifndef OPENSSL_NO_ECDH
257 if (cert->ecdh_tmp) {
258 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
259 if (ret->ecdh_tmp == NULL) {
260 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
264 ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
267 for (i = 0; i < SSL_PKEY_NUM; i++) {
268 if (cert->pkeys[i].x509 != NULL) {
269 ret->pkeys[i].x509 = cert->pkeys[i].x509;
270 CRYPTO_add(&ret->pkeys[i].x509->references, 1, CRYPTO_LOCK_X509);
273 if (cert->pkeys[i].privatekey != NULL) {
274 ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
275 CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
276 CRYPTO_LOCK_EVP_PKEY);
281 * ret->extra_certs *should* exist, but currently the own certificate
282 * chain is held inside SSL_CTX
287 * Set digests to defaults. NB: we don't copy existing values as they
288 * will be set during handshake.
290 ssl_cert_set_default_md(ret);
294 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
297 #ifndef OPENSSL_NO_RSA
298 if (ret->rsa_tmp != NULL)
299 RSA_free(ret->rsa_tmp);
301 #ifndef OPENSSL_NO_DH
302 if (ret->dh_tmp != NULL)
303 DH_free(ret->dh_tmp);
305 #ifndef OPENSSL_NO_ECDH
306 if (ret->ecdh_tmp != NULL)
307 EC_KEY_free(ret->ecdh_tmp);
310 for (i = 0; i < SSL_PKEY_NUM; i++) {
311 if (ret->pkeys[i].x509 != NULL)
312 X509_free(ret->pkeys[i].x509);
313 if (ret->pkeys[i].privatekey != NULL)
314 EVP_PKEY_free(ret->pkeys[i].privatekey);
320 void ssl_cert_free(CERT *c)
327 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
329 REF_PRINT("CERT", c);
335 fprintf(stderr, "ssl_cert_free, bad reference count\n");
340 #ifndef OPENSSL_NO_RSA
342 RSA_free(c->rsa_tmp);
344 #ifndef OPENSSL_NO_DH
348 #ifndef OPENSSL_NO_ECDH
350 EC_KEY_free(c->ecdh_tmp);
353 for (i = 0; i < SSL_PKEY_NUM; i++) {
354 if (c->pkeys[i].x509 != NULL)
355 X509_free(c->pkeys[i].x509);
356 if (c->pkeys[i].privatekey != NULL)
357 EVP_PKEY_free(c->pkeys[i].privatekey);
359 if (c->pkeys[i].publickey != NULL)
360 EVP_PKEY_free(c->pkeys[i].publickey);
366 int ssl_cert_inst(CERT **o)
369 * Create a CERT if there isn't already one (which cannot really happen,
370 * as it is initially created in SSL_CTX_new; but the earlier code
371 * usually allows for that one being non-existant, so we follow that
372 * behaviour, as it might turn out that there actually is a reason for it
373 * -- but I'm not sure that *all* of the existing code could cope with
374 * s->cert being NULL, otherwise we could do without the initialization
379 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
383 if ((*o = ssl_cert_new()) == NULL) {
384 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
391 SESS_CERT *ssl_sess_cert_new(void)
395 ret = OPENSSL_malloc(sizeof *ret);
397 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
401 memset(ret, 0, sizeof *ret);
402 ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
408 void ssl_sess_cert_free(SESS_CERT *sc)
415 i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
417 REF_PRINT("SESS_CERT", sc);
423 fprintf(stderr, "ssl_sess_cert_free, bad reference count\n");
429 if (sc->cert_chain != NULL)
430 sk_X509_pop_free(sc->cert_chain, X509_free);
431 for (i = 0; i < SSL_PKEY_NUM; i++) {
432 if (sc->peer_pkeys[i].x509 != NULL)
433 X509_free(sc->peer_pkeys[i].x509);
434 #if 0 /* We don't have the peer's private key.
435 * These lines are just * here as a reminder
436 * that we're still using a
437 * not-quite-appropriate * data structure. */
438 if (sc->peer_pkeys[i].privatekey != NULL)
439 EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
443 #ifndef OPENSSL_NO_RSA
444 if (sc->peer_rsa_tmp != NULL)
445 RSA_free(sc->peer_rsa_tmp);
447 #ifndef OPENSSL_NO_DH
448 if (sc->peer_dh_tmp != NULL)
449 DH_free(sc->peer_dh_tmp);
451 #ifndef OPENSSL_NO_ECDH
452 if (sc->peer_ecdh_tmp != NULL)
453 EC_KEY_free(sc->peer_ecdh_tmp);
459 int ssl_set_peer_cert_type(SESS_CERT *sc, int type)
461 sc->peer_cert_type = type;
465 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
471 if ((sk == NULL) || (sk_X509_num(sk) == 0))
474 x = sk_X509_value(sk, 0);
475 if (!X509_STORE_CTX_init(&ctx, s->ctx->cert_store, x, sk)) {
476 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
480 if (SSL_get_verify_depth(s) >= 0)
481 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
483 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);
486 * We need to inherit the verify parameters. These can be determined by
487 * the context: if its a server it will verify SSL client certificates or
491 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server");
493 * Anything non-default in "param" should overwrite anything in the ctx.
495 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
497 if (s->verify_callback)
498 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
500 if (s->ctx->app_verify_callback != NULL)
501 #if 1 /* new with OpenSSL 0.9.7 */
502 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
504 i = s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
507 #ifndef OPENSSL_NO_X509_VERIFY
508 i = X509_verify_cert(&ctx);
511 ctx.error = X509_V_ERR_APPLICATION_VERIFICATION;
512 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_NO_VERIFY_CALLBACK);
516 s->verify_result = ctx.error;
517 X509_STORE_CTX_cleanup(&ctx);
522 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
523 STACK_OF(X509_NAME) *name_list)
525 if (*ca_list != NULL)
526 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
528 *ca_list = name_list;
531 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
534 STACK_OF(X509_NAME) *ret;
537 ret = sk_X509_NAME_new_null();
538 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
539 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
540 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) {
541 sk_X509_NAME_pop_free(ret, X509_NAME_free);
548 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
550 set_client_CA_list(&(s->client_CA), name_list);
553 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
555 set_client_CA_list(&(ctx->client_CA), name_list);
558 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
560 return (ctx->client_CA);
563 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
565 if (s->type == SSL_ST_CONNECT) { /* we are in the client */
566 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
567 return (s->s3->tmp.ca_names);
571 if (s->client_CA != NULL)
572 return (s->client_CA);
574 return (s->ctx->client_CA);
578 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
584 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
587 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
590 if (!sk_X509_NAME_push(*sk, name)) {
591 X509_NAME_free(name);
597 int SSL_add_client_CA(SSL *ssl, X509 *x)
599 return (add_client_CA(&(ssl->client_CA), x));
602 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
604 return (add_client_CA(&(ctx->client_CA), x));
607 static int xname_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
609 return (X509_NAME_cmp(*a, *b));
612 #ifndef OPENSSL_NO_STDIO
614 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
615 * it doesn't really have anything to do with clients (except that a common use
616 * for a stack of CAs is to send it to the client). Actually, it doesn't have
617 * much to do with CAs, either, since it will load any old cert.
618 * \param file the file containing one or more certs.
619 * \return a ::STACK containing the certs.
621 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
625 X509_NAME *xn = NULL;
626 STACK_OF(X509_NAME) *ret = NULL, *sk;
628 sk = sk_X509_NAME_new(xname_cmp);
630 in = BIO_new(BIO_s_file_internal());
632 if ((sk == NULL) || (in == NULL)) {
633 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
637 if (!BIO_read_filename(in, file))
641 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
644 ret = sk_X509_NAME_new_null();
646 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
650 if ((xn = X509_get_subject_name(x)) == NULL)
652 /* check for duplicates */
653 xn = X509_NAME_dup(xn);
656 if (sk_X509_NAME_find(sk, xn) >= 0)
659 sk_X509_NAME_push(sk, xn);
660 sk_X509_NAME_push(ret, xn);
667 sk_X509_NAME_pop_free(ret, X509_NAME_free);
671 sk_X509_NAME_free(sk);
683 * Add a file of certs to a stack.
684 * \param stack the stack to add to.
685 * \param file the file to add from. All certs in this file that are not
686 * already in the stack will be added.
687 * \return 1 for success, 0 for failure. Note that in the case of failure some
688 * certs may have been added to \c stack.
691 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
696 X509_NAME *xn = NULL;
698 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
700 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
702 in = BIO_new(BIO_s_file_internal());
705 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
706 ERR_R_MALLOC_FAILURE);
710 if (!BIO_read_filename(in, file))
714 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
716 if ((xn = X509_get_subject_name(x)) == NULL)
718 xn = X509_NAME_dup(xn);
721 if (sk_X509_NAME_find(stack, xn) >= 0)
724 sk_X509_NAME_push(stack, xn);
738 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
744 * Add a directory of certs to a stack.
745 * \param stack the stack to append to.
746 * \param dir the directory to append from. All files in this directory will be
747 * examined as potential certs. Any that are acceptable to
748 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
750 * \return 1 for success, 0 for failure. Note that in the case of failure some
751 * certs may have been added to \c stack.
754 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
757 OPENSSL_DIR_CTX *d = NULL;
758 const char *filename;
761 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
763 /* Note that a side effect is that the CAs will be sorted by name */
765 while ((filename = OPENSSL_DIR_read(&d, dir))) {
769 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
770 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
771 SSL_R_PATH_TOO_LONG);
774 #ifdef OPENSSL_SYS_VMS
775 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
777 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
779 if (r <= 0 || r >= (int)sizeof(buf))
781 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
786 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
787 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
788 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
797 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);