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>
126 #include "internal/o_dir.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 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op,
138 int bits, int nid, void *other,
141 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
143 static volatile int ssl_x509_store_ctx_idx = -1;
144 int got_write_lock = 0;
146 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
148 if (ssl_x509_store_ctx_idx < 0) {
149 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
150 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
153 if (ssl_x509_store_ctx_idx < 0) {
154 ssl_x509_store_ctx_idx =
155 X509_STORE_CTX_get_ex_new_index(0, "SSL for verify callback",
161 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
163 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
165 return ssl_x509_store_ctx_idx;
168 CERT *ssl_cert_new(void)
170 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
173 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
177 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
179 ret->sec_cb = ssl_security_default_callback;
180 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
185 CERT *ssl_cert_dup(CERT *cert)
187 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
191 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
196 ret->key = &ret->pkeys[cert->key - cert->pkeys];
198 #ifndef OPENSSL_NO_RSA
199 if (cert->rsa_tmp != NULL) {
200 RSA_up_ref(cert->rsa_tmp);
201 ret->rsa_tmp = cert->rsa_tmp;
203 ret->rsa_tmp_cb = cert->rsa_tmp_cb;
206 #ifndef OPENSSL_NO_DH
207 if (cert->dh_tmp != NULL) {
208 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
209 if (ret->dh_tmp == NULL) {
210 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
213 if (cert->dh_tmp->priv_key) {
214 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
216 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
219 ret->dh_tmp->priv_key = b;
221 if (cert->dh_tmp->pub_key) {
222 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
224 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
227 ret->dh_tmp->pub_key = b;
230 ret->dh_tmp_cb = cert->dh_tmp_cb;
231 ret->dh_tmp_auto = cert->dh_tmp_auto;
234 #ifndef OPENSSL_NO_EC
235 if (cert->ecdh_tmp) {
236 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
237 if (ret->ecdh_tmp == NULL) {
238 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
242 ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
243 ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
246 for (i = 0; i < SSL_PKEY_NUM; i++) {
247 CERT_PKEY *cpk = cert->pkeys + i;
248 CERT_PKEY *rpk = ret->pkeys + i;
249 if (cpk->x509 != NULL) {
250 rpk->x509 = cpk->x509;
251 X509_up_ref(rpk->x509);
254 if (cpk->privatekey != NULL) {
255 rpk->privatekey = cpk->privatekey;
256 CRYPTO_add(&cpk->privatekey->references, 1, CRYPTO_LOCK_EVP_PKEY);
260 rpk->chain = X509_chain_up_ref(cpk->chain);
262 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
266 if (cert->pkeys[i].serverinfo != NULL) {
267 /* Just copy everything. */
268 ret->pkeys[i].serverinfo =
269 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
270 if (ret->pkeys[i].serverinfo == NULL) {
271 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
274 ret->pkeys[i].serverinfo_length =
275 cert->pkeys[i].serverinfo_length;
276 memcpy(ret->pkeys[i].serverinfo,
277 cert->pkeys[i].serverinfo,
278 cert->pkeys[i].serverinfo_length);
282 /* Configured sigalgs copied across */
283 if (cert->conf_sigalgs) {
284 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
285 if (!ret->conf_sigalgs)
287 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
288 ret->conf_sigalgslen = cert->conf_sigalgslen;
290 ret->conf_sigalgs = NULL;
292 if (cert->client_sigalgs) {
293 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
294 if (!ret->client_sigalgs)
296 memcpy(ret->client_sigalgs, cert->client_sigalgs,
297 cert->client_sigalgslen);
298 ret->client_sigalgslen = cert->client_sigalgslen;
300 ret->client_sigalgs = NULL;
301 /* Shared sigalgs also NULL */
302 ret->shared_sigalgs = NULL;
303 /* Copy any custom client certificate types */
305 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
308 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
309 ret->ctype_num = cert->ctype_num;
312 ret->cert_flags = cert->cert_flags;
314 ret->cert_cb = cert->cert_cb;
315 ret->cert_cb_arg = cert->cert_cb_arg;
317 if (cert->verify_store) {
318 CRYPTO_add(&cert->verify_store->references, 1,
319 CRYPTO_LOCK_X509_STORE);
320 ret->verify_store = cert->verify_store;
323 if (cert->chain_store) {
324 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
325 ret->chain_store = cert->chain_store;
328 ret->sec_cb = cert->sec_cb;
329 ret->sec_level = cert->sec_level;
330 ret->sec_ex = cert->sec_ex;
332 if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
334 if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
336 #ifndef OPENSSL_NO_PSK
337 if (cert->psk_identity_hint) {
338 ret->psk_identity_hint = BUF_strdup(cert->psk_identity_hint);
339 if (ret->psk_identity_hint == NULL)
351 /* Free up and clear all certificates and chains */
353 void ssl_cert_clear_certs(CERT *c)
358 for (i = 0; i < SSL_PKEY_NUM; i++) {
359 CERT_PKEY *cpk = c->pkeys + i;
360 X509_free(cpk->x509);
362 EVP_PKEY_free(cpk->privatekey);
363 cpk->privatekey = NULL;
364 sk_X509_pop_free(cpk->chain, X509_free);
366 OPENSSL_free(cpk->serverinfo);
367 cpk->serverinfo = NULL;
368 cpk->serverinfo_length = 0;
372 void ssl_cert_free(CERT *c)
379 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
381 REF_PRINT("CERT", c);
387 fprintf(stderr, "ssl_cert_free, bad reference count\n");
392 #ifndef OPENSSL_NO_RSA
393 RSA_free(c->rsa_tmp);
395 #ifndef OPENSSL_NO_DH
398 #ifndef OPENSSL_NO_EC
399 EC_KEY_free(c->ecdh_tmp);
402 ssl_cert_clear_certs(c);
403 OPENSSL_free(c->conf_sigalgs);
404 OPENSSL_free(c->client_sigalgs);
405 OPENSSL_free(c->shared_sigalgs);
406 OPENSSL_free(c->ctypes);
407 X509_STORE_free(c->verify_store);
408 X509_STORE_free(c->chain_store);
409 custom_exts_free(&c->cli_ext);
410 custom_exts_free(&c->srv_ext);
411 #ifndef OPENSSL_NO_PSK
412 OPENSSL_free(c->psk_identity_hint);
417 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
420 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
423 sk_X509_pop_free(cpk->chain, X509_free);
424 for (i = 0; i < sk_X509_num(chain); i++) {
425 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
427 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
435 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
437 STACK_OF(X509) *dchain;
439 return ssl_cert_set0_chain(s, ctx, NULL);
440 dchain = X509_chain_up_ref(chain);
443 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
444 sk_X509_pop_free(dchain, X509_free);
450 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
453 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
456 r = ssl_security_cert(s, ctx, x, 0, 0);
458 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
462 cpk->chain = sk_X509_new_null();
463 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
468 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
470 if (!ssl_cert_add0_chain_cert(s, ctx, x))
476 int ssl_cert_select_current(CERT *c, X509 *x)
481 for (i = 0; i < SSL_PKEY_NUM; i++) {
482 CERT_PKEY *cpk = c->pkeys + i;
483 if (cpk->x509 == x && cpk->privatekey) {
489 for (i = 0; i < SSL_PKEY_NUM; i++) {
490 CERT_PKEY *cpk = c->pkeys + i;
491 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
499 int ssl_cert_set_current(CERT *c, long op)
504 if (op == SSL_CERT_SET_FIRST)
506 else if (op == SSL_CERT_SET_NEXT) {
507 idx = (int)(c->key - c->pkeys + 1);
508 if (idx >= SSL_PKEY_NUM)
512 for (i = idx; i < SSL_PKEY_NUM; i++) {
513 CERT_PKEY *cpk = c->pkeys + i;
514 if (cpk->x509 && cpk->privatekey) {
522 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
525 c->cert_cb_arg = arg;
528 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
532 X509_STORE *verify_store;
535 if (s->cert->verify_store)
536 verify_store = s->cert->verify_store;
538 verify_store = s->ctx->cert_store;
540 if ((sk == NULL) || (sk_X509_num(sk) == 0))
543 x = sk_X509_value(sk, 0);
544 if (!X509_STORE_CTX_init(&ctx, verify_store, x, sk)) {
545 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
548 /* Set suite B flags if needed */
549 X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
550 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);
553 * We need to inherit the verify parameters. These can be determined by
554 * the context: if its a server it will verify SSL client certificates or
558 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server");
560 * Anything non-default in "param" should overwrite anything in the ctx.
562 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
564 if (s->verify_callback)
565 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
567 if (s->ctx->app_verify_callback != NULL)
568 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
570 i = X509_verify_cert(&ctx);
572 /* Dummy error calls so mkerr generates them */
573 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
574 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
575 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
578 i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
581 s->verify_result = ctx.error;
582 X509_STORE_CTX_cleanup(&ctx);
587 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
588 STACK_OF(X509_NAME) *name_list)
590 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
591 *ca_list = name_list;
594 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
597 STACK_OF(X509_NAME) *ret;
600 ret = sk_X509_NAME_new_null();
601 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
602 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
603 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) {
604 sk_X509_NAME_pop_free(ret, X509_NAME_free);
611 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
613 set_client_CA_list(&(s->client_CA), name_list);
616 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
618 set_client_CA_list(&(ctx->client_CA), name_list);
621 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
623 return (ctx->client_CA);
626 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
628 if (s->type == SSL_ST_CONNECT) { /* we are in the client */
629 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
630 return (s->s3->tmp.ca_names);
634 if (s->client_CA != NULL)
635 return (s->client_CA);
637 return (s->ctx->client_CA);
641 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
647 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
650 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
653 if (!sk_X509_NAME_push(*sk, name)) {
654 X509_NAME_free(name);
660 int SSL_add_client_CA(SSL *ssl, X509 *x)
662 return (add_client_CA(&(ssl->client_CA), x));
665 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
667 return (add_client_CA(&(ctx->client_CA), x));
670 static int xname_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
672 return (X509_NAME_cmp(*a, *b));
676 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
677 * it doesn't really have anything to do with clients (except that a common use
678 * for a stack of CAs is to send it to the client). Actually, it doesn't have
679 * much to do with CAs, either, since it will load any old cert.
680 * \param file the file containing one or more certs.
681 * \return a ::STACK containing the certs.
683 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
687 X509_NAME *xn = NULL;
688 STACK_OF(X509_NAME) *ret = NULL, *sk;
690 sk = sk_X509_NAME_new(xname_cmp);
692 in = BIO_new(BIO_s_file());
694 if ((sk == NULL) || (in == NULL)) {
695 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
699 if (!BIO_read_filename(in, file))
703 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
706 ret = sk_X509_NAME_new_null();
708 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
712 if ((xn = X509_get_subject_name(x)) == NULL)
714 /* check for duplicates */
715 xn = X509_NAME_dup(xn);
718 if (sk_X509_NAME_find(sk, xn) >= 0)
721 sk_X509_NAME_push(sk, xn);
722 sk_X509_NAME_push(ret, xn);
728 sk_X509_NAME_pop_free(ret, X509_NAME_free);
731 sk_X509_NAME_free(sk);
740 * Add a file of certs to a stack.
741 * \param stack the stack to add to.
742 * \param file the file to add from. All certs in this file that are not
743 * already in the stack will be added.
744 * \return 1 for success, 0 for failure. Note that in the case of failure some
745 * certs may have been added to \c stack.
748 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
753 X509_NAME *xn = NULL;
755 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
757 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
759 in = BIO_new(BIO_s_file());
762 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
763 ERR_R_MALLOC_FAILURE);
767 if (!BIO_read_filename(in, file))
771 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
773 if ((xn = X509_get_subject_name(x)) == NULL)
775 xn = X509_NAME_dup(xn);
778 if (sk_X509_NAME_find(stack, xn) >= 0)
781 sk_X509_NAME_push(stack, xn);
792 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
797 * Add a directory of certs to a stack.
798 * \param stack the stack to append to.
799 * \param dir the directory to append from. All files in this directory will be
800 * examined as potential certs. Any that are acceptable to
801 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
803 * \return 1 for success, 0 for failure. Note that in the case of failure some
804 * certs may have been added to \c stack.
807 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
810 OPENSSL_DIR_CTX *d = NULL;
811 const char *filename;
814 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
816 /* Note that a side effect is that the CAs will be sorted by name */
818 while ((filename = OPENSSL_DIR_read(&d, dir))) {
822 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
823 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
824 SSL_R_PATH_TOO_LONG);
827 #ifdef OPENSSL_SYS_VMS
828 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
830 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
832 if (r <= 0 || r >= (int)sizeof(buf))
834 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
839 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
840 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
841 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
850 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
854 /* Add a certificate to a BUF_MEM structure */
856 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
861 n = i2d_X509(x, NULL);
862 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
863 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
866 p = (unsigned char *)&(buf->data[*l]);
874 /* Add certificate chain to internal SSL BUF_MEM strcuture */
875 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
877 BUF_MEM *buf = s->init_buf;
881 STACK_OF(X509) *extra_certs;
882 X509_STORE *chain_store;
884 /* TLSv1 sends a chain with nothing in it, instead of an alert */
885 if (!BUF_MEM_grow_clean(buf, 10)) {
886 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
890 if (!cpk || !cpk->x509)
896 * If we have a certificate specific chain use it, else use parent ctx.
899 extra_certs = cpk->chain;
901 extra_certs = s->ctx->extra_certs;
903 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
905 else if (s->cert->chain_store)
906 chain_store = s->cert->chain_store;
908 chain_store = s->ctx->cert_store;
911 X509_STORE_CTX xs_ctx;
913 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, x, NULL)) {
914 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
917 X509_verify_cert(&xs_ctx);
918 /* Don't leave errors in the queue */
920 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
922 X509_STORE_CTX_cleanup(&xs_ctx);
923 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
926 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
927 x = sk_X509_value(xs_ctx.chain, i);
929 if (!ssl_add_cert_to_buf(buf, l, x)) {
930 X509_STORE_CTX_cleanup(&xs_ctx);
934 X509_STORE_CTX_cleanup(&xs_ctx);
936 i = ssl_security_cert_chain(s, extra_certs, x, 0);
938 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
941 if (!ssl_add_cert_to_buf(buf, l, x))
943 for (i = 0; i < sk_X509_num(extra_certs); i++) {
944 x = sk_X509_value(extra_certs, i);
945 if (!ssl_add_cert_to_buf(buf, l, x))
952 /* Build a certificate chain for current certificate */
953 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
955 CERT *c = s ? s->cert : ctx->cert;
956 CERT_PKEY *cpk = c->key;
957 X509_STORE *chain_store = NULL;
958 X509_STORE_CTX xs_ctx;
959 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
965 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
968 /* Rearranging and check the chain: add everything to a store */
969 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
970 chain_store = X509_STORE_new();
973 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
974 x = sk_X509_value(cpk->chain, i);
975 if (!X509_STORE_add_cert(chain_store, x)) {
976 error = ERR_peek_last_error();
977 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
978 ERR_GET_REASON(error) !=
979 X509_R_CERT_ALREADY_IN_HASH_TABLE)
984 /* Add EE cert too: it might be self signed */
985 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
986 error = ERR_peek_last_error();
987 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
988 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
994 chain_store = c->chain_store;
996 chain_store = s->ctx->cert_store;
998 chain_store = ctx->cert_store;
1000 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1001 untrusted = cpk->chain;
1004 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted)) {
1005 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1008 /* Set suite B flags if needed */
1009 X509_STORE_CTX_set_flags(&xs_ctx,
1010 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1012 i = X509_verify_cert(&xs_ctx);
1013 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
1014 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1020 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1022 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1023 i = X509_STORE_CTX_get_error(&xs_ctx);
1024 ERR_add_error_data(2, "Verify error:",
1025 X509_verify_cert_error_string(i));
1027 X509_STORE_CTX_cleanup(&xs_ctx);
1030 X509_STORE_CTX_cleanup(&xs_ctx);
1031 /* Remove EE certificate from chain */
1032 x = sk_X509_shift(chain);
1034 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
1035 if (sk_X509_num(chain) > 0) {
1036 /* See if last cert is self signed */
1037 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1038 if (X509_get_extension_flags(x) & EXFLAG_SS) {
1039 x = sk_X509_pop(chain);
1045 * Check security level of all CA certificates: EE will have been checked
1048 for (i = 0; i < sk_X509_num(chain); i++) {
1049 x = sk_X509_value(chain, i);
1050 rv = ssl_security_cert(s, ctx, x, 0, 0);
1052 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1053 sk_X509_pop_free(chain, X509_free);
1058 sk_X509_pop_free(cpk->chain, X509_free);
1063 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1064 X509_STORE_free(chain_store);
1069 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1071 X509_STORE **pstore;
1073 pstore = &c->chain_store;
1075 pstore = &c->verify_store;
1076 X509_STORE_free(*pstore);
1079 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1083 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op,
1084 int bits, int nid, void *other,
1088 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1090 level = SSL_CTX_get_security_level(ctx);
1092 level = SSL_get_security_level(s);
1093 /* Level 0: anything goes */
1098 minbits = minbits_table[level - 1];
1100 case SSL_SECOP_CIPHER_SUPPORTED:
1101 case SSL_SECOP_CIPHER_SHARED:
1102 case SSL_SECOP_CIPHER_CHECK:
1104 const SSL_CIPHER *c = other;
1105 /* No ciphers below security level */
1108 /* No unauthenticated ciphersuites */
1109 if (c->algorithm_auth & SSL_aNULL)
1111 /* No MD5 mac ciphersuites */
1112 if (c->algorithm_mac & SSL_MD5)
1114 /* SHA1 HMAC is 160 bits of security */
1115 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1117 /* Level 2: no RC4 */
1118 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1120 /* Level 3: forward secure ciphersuites only */
1121 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1125 case SSL_SECOP_VERSION:
1126 /* SSLv3 not allowed on level 2 */
1127 if (nid <= SSL3_VERSION && level >= 2)
1129 /* TLS v1.1 and above only for level 3 */
1130 if (nid <= TLS1_VERSION && level >= 3)
1132 /* TLS v1.2 only for level 4 and above */
1133 if (nid <= TLS1_1_VERSION && level >= 4)
1137 case SSL_SECOP_COMPRESSION:
1141 case SSL_SECOP_TICKET:
1152 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1154 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1157 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1159 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,