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_DH
199 if (cert->dh_tmp != NULL) {
200 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
201 if (ret->dh_tmp == NULL) {
202 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
205 if (cert->dh_tmp->priv_key) {
206 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
208 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
211 ret->dh_tmp->priv_key = b;
213 if (cert->dh_tmp->pub_key) {
214 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
216 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
219 ret->dh_tmp->pub_key = b;
222 ret->dh_tmp_cb = cert->dh_tmp_cb;
223 ret->dh_tmp_auto = cert->dh_tmp_auto;
226 for (i = 0; i < SSL_PKEY_NUM; i++) {
227 CERT_PKEY *cpk = cert->pkeys + i;
228 CERT_PKEY *rpk = ret->pkeys + i;
229 if (cpk->x509 != NULL) {
230 rpk->x509 = cpk->x509;
231 X509_up_ref(rpk->x509);
234 if (cpk->privatekey != NULL) {
235 rpk->privatekey = cpk->privatekey;
236 CRYPTO_add(&cpk->privatekey->references, 1, CRYPTO_LOCK_EVP_PKEY);
240 rpk->chain = X509_chain_up_ref(cpk->chain);
242 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
246 if (cert->pkeys[i].serverinfo != NULL) {
247 /* Just copy everything. */
248 ret->pkeys[i].serverinfo =
249 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
250 if (ret->pkeys[i].serverinfo == NULL) {
251 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
254 ret->pkeys[i].serverinfo_length =
255 cert->pkeys[i].serverinfo_length;
256 memcpy(ret->pkeys[i].serverinfo,
257 cert->pkeys[i].serverinfo,
258 cert->pkeys[i].serverinfo_length);
262 /* Configured sigalgs copied across */
263 if (cert->conf_sigalgs) {
264 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
265 if (ret->conf_sigalgs == NULL)
267 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
268 ret->conf_sigalgslen = cert->conf_sigalgslen;
270 ret->conf_sigalgs = NULL;
272 if (cert->client_sigalgs) {
273 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
274 if (ret->client_sigalgs == NULL)
276 memcpy(ret->client_sigalgs, cert->client_sigalgs,
277 cert->client_sigalgslen);
278 ret->client_sigalgslen = cert->client_sigalgslen;
280 ret->client_sigalgs = NULL;
281 /* Shared sigalgs also NULL */
282 ret->shared_sigalgs = NULL;
283 /* Copy any custom client certificate types */
285 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
286 if (ret->ctypes == NULL)
288 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
289 ret->ctype_num = cert->ctype_num;
292 ret->cert_flags = cert->cert_flags;
294 ret->cert_cb = cert->cert_cb;
295 ret->cert_cb_arg = cert->cert_cb_arg;
297 if (cert->verify_store) {
298 CRYPTO_add(&cert->verify_store->references, 1,
299 CRYPTO_LOCK_X509_STORE);
300 ret->verify_store = cert->verify_store;
303 if (cert->chain_store) {
304 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
305 ret->chain_store = cert->chain_store;
308 ret->sec_cb = cert->sec_cb;
309 ret->sec_level = cert->sec_level;
310 ret->sec_ex = cert->sec_ex;
312 if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
314 if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
316 #ifndef OPENSSL_NO_PSK
317 if (cert->psk_identity_hint) {
318 ret->psk_identity_hint = BUF_strdup(cert->psk_identity_hint);
319 if (ret->psk_identity_hint == NULL)
331 /* Free up and clear all certificates and chains */
333 void ssl_cert_clear_certs(CERT *c)
338 for (i = 0; i < SSL_PKEY_NUM; i++) {
339 CERT_PKEY *cpk = c->pkeys + i;
340 X509_free(cpk->x509);
342 EVP_PKEY_free(cpk->privatekey);
343 cpk->privatekey = NULL;
344 sk_X509_pop_free(cpk->chain, X509_free);
346 OPENSSL_free(cpk->serverinfo);
347 cpk->serverinfo = NULL;
348 cpk->serverinfo_length = 0;
352 void ssl_cert_free(CERT *c)
359 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
361 REF_PRINT("CERT", c);
367 fprintf(stderr, "ssl_cert_free, bad reference count\n");
372 #ifndef OPENSSL_NO_DH
376 ssl_cert_clear_certs(c);
377 OPENSSL_free(c->conf_sigalgs);
378 OPENSSL_free(c->client_sigalgs);
379 OPENSSL_free(c->shared_sigalgs);
380 OPENSSL_free(c->ctypes);
381 X509_STORE_free(c->verify_store);
382 X509_STORE_free(c->chain_store);
383 custom_exts_free(&c->cli_ext);
384 custom_exts_free(&c->srv_ext);
385 #ifndef OPENSSL_NO_PSK
386 OPENSSL_free(c->psk_identity_hint);
391 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
394 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
397 sk_X509_pop_free(cpk->chain, X509_free);
398 for (i = 0; i < sk_X509_num(chain); i++) {
399 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
401 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
409 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
411 STACK_OF(X509) *dchain;
413 return ssl_cert_set0_chain(s, ctx, NULL);
414 dchain = X509_chain_up_ref(chain);
417 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
418 sk_X509_pop_free(dchain, X509_free);
424 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
427 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
430 r = ssl_security_cert(s, ctx, x, 0, 0);
432 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
436 cpk->chain = sk_X509_new_null();
437 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
442 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
444 if (!ssl_cert_add0_chain_cert(s, ctx, x))
450 int ssl_cert_select_current(CERT *c, X509 *x)
455 for (i = 0; i < SSL_PKEY_NUM; i++) {
456 CERT_PKEY *cpk = c->pkeys + i;
457 if (cpk->x509 == x && cpk->privatekey) {
463 for (i = 0; i < SSL_PKEY_NUM; i++) {
464 CERT_PKEY *cpk = c->pkeys + i;
465 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
473 int ssl_cert_set_current(CERT *c, long op)
478 if (op == SSL_CERT_SET_FIRST)
480 else if (op == SSL_CERT_SET_NEXT) {
481 idx = (int)(c->key - c->pkeys + 1);
482 if (idx >= SSL_PKEY_NUM)
486 for (i = idx; i < SSL_PKEY_NUM; i++) {
487 CERT_PKEY *cpk = c->pkeys + i;
488 if (cpk->x509 && cpk->privatekey) {
496 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
499 c->cert_cb_arg = arg;
502 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
506 X509_STORE *verify_store;
509 if (s->cert->verify_store)
510 verify_store = s->cert->verify_store;
512 verify_store = s->ctx->cert_store;
514 if ((sk == NULL) || (sk_X509_num(sk) == 0))
517 x = sk_X509_value(sk, 0);
518 if (!X509_STORE_CTX_init(&ctx, verify_store, x, sk)) {
519 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
522 /* Set suite B flags if needed */
523 X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
524 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);
527 * We need to inherit the verify parameters. These can be determined by
528 * the context: if its a server it will verify SSL client certificates or
532 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server");
534 * Anything non-default in "param" should overwrite anything in the ctx.
536 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
538 if (s->verify_callback)
539 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
541 if (s->ctx->app_verify_callback != NULL)
542 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
544 i = X509_verify_cert(&ctx);
546 /* Dummy error calls so mkerr generates them */
547 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
548 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
549 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
552 i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
555 s->verify_result = ctx.error;
556 X509_STORE_CTX_cleanup(&ctx);
561 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
562 STACK_OF(X509_NAME) *name_list)
564 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
565 *ca_list = name_list;
568 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
571 STACK_OF(X509_NAME) *ret;
574 ret = sk_X509_NAME_new_null();
575 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
576 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
577 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) {
578 sk_X509_NAME_pop_free(ret, X509_NAME_free);
585 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
587 set_client_CA_list(&(s->client_CA), name_list);
590 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
592 set_client_CA_list(&(ctx->client_CA), name_list);
595 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
597 return (ctx->client_CA);
600 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
602 if (!s->server) { /* we are in the client */
603 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
604 return (s->s3->tmp.ca_names);
608 if (s->client_CA != NULL)
609 return (s->client_CA);
611 return (s->ctx->client_CA);
615 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
621 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
624 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
627 if (!sk_X509_NAME_push(*sk, name)) {
628 X509_NAME_free(name);
634 int SSL_add_client_CA(SSL *ssl, X509 *x)
636 return (add_client_CA(&(ssl->client_CA), x));
639 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
641 return (add_client_CA(&(ctx->client_CA), x));
644 static int xname_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
646 return (X509_NAME_cmp(*a, *b));
650 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
651 * it doesn't really have anything to do with clients (except that a common use
652 * for a stack of CAs is to send it to the client). Actually, it doesn't have
653 * much to do with CAs, either, since it will load any old cert.
654 * \param file the file containing one or more certs.
655 * \return a ::STACK containing the certs.
657 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
661 X509_NAME *xn = NULL;
662 STACK_OF(X509_NAME) *ret = NULL, *sk;
664 sk = sk_X509_NAME_new(xname_cmp);
666 in = BIO_new(BIO_s_file());
668 if ((sk == NULL) || (in == NULL)) {
669 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
673 if (!BIO_read_filename(in, file))
677 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
680 ret = sk_X509_NAME_new_null();
682 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
686 if ((xn = X509_get_subject_name(x)) == NULL)
688 /* check for duplicates */
689 xn = X509_NAME_dup(xn);
692 if (sk_X509_NAME_find(sk, xn) >= 0)
695 sk_X509_NAME_push(sk, xn);
696 sk_X509_NAME_push(ret, xn);
702 sk_X509_NAME_pop_free(ret, X509_NAME_free);
705 sk_X509_NAME_free(sk);
714 * Add a file of certs to a stack.
715 * \param stack the stack to add to.
716 * \param file the file to add from. All certs in this file that are not
717 * already in the stack will be added.
718 * \return 1 for success, 0 for failure. Note that in the case of failure some
719 * certs may have been added to \c stack.
722 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
727 X509_NAME *xn = NULL;
729 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
731 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
733 in = BIO_new(BIO_s_file());
736 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
737 ERR_R_MALLOC_FAILURE);
741 if (!BIO_read_filename(in, file))
745 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
747 if ((xn = X509_get_subject_name(x)) == NULL)
749 xn = X509_NAME_dup(xn);
752 if (sk_X509_NAME_find(stack, xn) >= 0)
755 sk_X509_NAME_push(stack, xn);
766 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
771 * Add a directory of certs to a stack.
772 * \param stack the stack to append to.
773 * \param dir the directory to append from. All files in this directory will be
774 * examined as potential certs. Any that are acceptable to
775 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
777 * \return 1 for success, 0 for failure. Note that in the case of failure some
778 * certs may have been added to \c stack.
781 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
784 OPENSSL_DIR_CTX *d = NULL;
785 const char *filename;
788 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
790 /* Note that a side effect is that the CAs will be sorted by name */
792 while ((filename = OPENSSL_DIR_read(&d, dir))) {
796 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
797 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
798 SSL_R_PATH_TOO_LONG);
801 #ifdef OPENSSL_SYS_VMS
802 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
804 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
806 if (r <= 0 || r >= (int)sizeof(buf))
808 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
813 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
814 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
815 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
824 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
828 /* Add a certificate to a BUF_MEM structure */
830 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
835 n = i2d_X509(x, NULL);
836 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
837 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
840 p = (unsigned char *)&(buf->data[*l]);
848 /* Add certificate chain to internal SSL BUF_MEM strcuture */
849 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
851 BUF_MEM *buf = s->init_buf;
855 STACK_OF(X509) *extra_certs;
856 X509_STORE *chain_store;
858 /* TLSv1 sends a chain with nothing in it, instead of an alert */
859 if (!BUF_MEM_grow_clean(buf, 10)) {
860 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
864 if (!cpk || !cpk->x509)
870 * If we have a certificate specific chain use it, else use parent ctx.
873 extra_certs = cpk->chain;
875 extra_certs = s->ctx->extra_certs;
877 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
879 else if (s->cert->chain_store)
880 chain_store = s->cert->chain_store;
882 chain_store = s->ctx->cert_store;
885 X509_STORE_CTX xs_ctx;
887 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, x, NULL)) {
888 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
892 * It is valid for the chain not to be complete (because normally we
893 * don't include the root cert in the chain). Therefore we deliberately
894 * ignore the error return from this call. We're not actually verifying
895 * the cert - we're just building as much of the chain as we can
897 X509_verify_cert(&xs_ctx);
898 /* Don't leave errors in the queue */
900 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
902 X509_STORE_CTX_cleanup(&xs_ctx);
903 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
906 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
907 x = sk_X509_value(xs_ctx.chain, i);
909 if (!ssl_add_cert_to_buf(buf, l, x)) {
910 X509_STORE_CTX_cleanup(&xs_ctx);
914 X509_STORE_CTX_cleanup(&xs_ctx);
916 i = ssl_security_cert_chain(s, extra_certs, x, 0);
918 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
921 if (!ssl_add_cert_to_buf(buf, l, x))
923 for (i = 0; i < sk_X509_num(extra_certs); i++) {
924 x = sk_X509_value(extra_certs, i);
925 if (!ssl_add_cert_to_buf(buf, l, x))
932 /* Build a certificate chain for current certificate */
933 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
935 CERT *c = s ? s->cert : ctx->cert;
936 CERT_PKEY *cpk = c->key;
937 X509_STORE *chain_store = NULL;
938 X509_STORE_CTX xs_ctx;
939 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
945 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
948 /* Rearranging and check the chain: add everything to a store */
949 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
950 chain_store = X509_STORE_new();
951 if (chain_store == NULL)
953 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
954 x = sk_X509_value(cpk->chain, i);
955 if (!X509_STORE_add_cert(chain_store, x)) {
956 error = ERR_peek_last_error();
957 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
958 ERR_GET_REASON(error) !=
959 X509_R_CERT_ALREADY_IN_HASH_TABLE)
964 /* Add EE cert too: it might be self signed */
965 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
966 error = ERR_peek_last_error();
967 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
968 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
974 chain_store = c->chain_store;
976 chain_store = s->ctx->cert_store;
978 chain_store = ctx->cert_store;
980 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
981 untrusted = cpk->chain;
984 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted)) {
985 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
988 /* Set suite B flags if needed */
989 X509_STORE_CTX_set_flags(&xs_ctx,
990 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
992 i = X509_verify_cert(&xs_ctx);
993 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
994 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1000 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1002 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1003 i = X509_STORE_CTX_get_error(&xs_ctx);
1004 ERR_add_error_data(2, "Verify error:",
1005 X509_verify_cert_error_string(i));
1007 X509_STORE_CTX_cleanup(&xs_ctx);
1010 X509_STORE_CTX_cleanup(&xs_ctx);
1011 /* Remove EE certificate from chain */
1012 x = sk_X509_shift(chain);
1014 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
1015 if (sk_X509_num(chain) > 0) {
1016 /* See if last cert is self signed */
1017 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1018 if (X509_get_extension_flags(x) & EXFLAG_SS) {
1019 x = sk_X509_pop(chain);
1025 * Check security level of all CA certificates: EE will have been checked
1028 for (i = 0; i < sk_X509_num(chain); i++) {
1029 x = sk_X509_value(chain, i);
1030 rv = ssl_security_cert(s, ctx, x, 0, 0);
1032 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1033 sk_X509_pop_free(chain, X509_free);
1038 sk_X509_pop_free(cpk->chain, X509_free);
1043 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1044 X509_STORE_free(chain_store);
1049 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1051 X509_STORE **pstore;
1053 pstore = &c->chain_store;
1055 pstore = &c->verify_store;
1056 X509_STORE_free(*pstore);
1059 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1063 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op,
1064 int bits, int nid, void *other,
1068 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1070 level = SSL_CTX_get_security_level(ctx);
1072 level = SSL_get_security_level(s);
1073 /* Level 0: anything goes */
1078 minbits = minbits_table[level - 1];
1080 case SSL_SECOP_CIPHER_SUPPORTED:
1081 case SSL_SECOP_CIPHER_SHARED:
1082 case SSL_SECOP_CIPHER_CHECK:
1084 const SSL_CIPHER *c = other;
1085 /* No ciphers below security level */
1088 /* No unauthenticated ciphersuites */
1089 if (c->algorithm_auth & SSL_aNULL)
1091 /* No MD5 mac ciphersuites */
1092 if (c->algorithm_mac & SSL_MD5)
1094 /* SHA1 HMAC is 160 bits of security */
1095 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1097 /* Level 2: no RC4 */
1098 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1100 /* Level 3: forward secure ciphersuites only */
1101 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1105 case SSL_SECOP_VERSION:
1106 /* SSLv3 not allowed on level 2 */
1107 if (nid <= SSL3_VERSION && level >= 2)
1109 /* TLS v1.1 and above only for level 3 */
1110 if (nid <= TLS1_VERSION && level >= 3)
1112 /* TLS v1.2 only for level 4 and above */
1113 if (nid <= TLS1_1_VERSION && level >= 4)
1117 case SSL_SECOP_COMPRESSION:
1121 case SSL_SECOP_TICKET:
1132 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1134 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1137 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1139 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,