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 void ssl_cert_set_default_md(CERT *cert)
170 /* Set digest values to defaults */
171 #ifndef OPENSSL_NO_DSA
172 cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
174 #ifndef OPENSSL_NO_RSA
175 cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
176 cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
178 #ifndef OPENSSL_NO_EC
179 cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
183 CERT *ssl_cert_new(void)
185 CERT *ret = OPENSSL_malloc(sizeof(*ret));
188 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
191 memset(ret, 0, sizeof(*ret));
193 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
195 ssl_cert_set_default_md(ret);
196 ret->sec_cb = ssl_security_default_callback;
197 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
202 CERT *ssl_cert_dup(CERT *cert)
204 CERT *ret = OPENSSL_malloc(sizeof(*ret));
208 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
212 memset(ret, 0, sizeof(*ret));
214 ret->key = &ret->pkeys[cert->key - cert->pkeys];
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;
254 ret->dh_tmp_auto = cert->dh_tmp_auto;
257 #ifndef OPENSSL_NO_EC
258 if (cert->ecdh_tmp) {
259 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
260 if (ret->ecdh_tmp == NULL) {
261 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
265 ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
266 ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
269 for (i = 0; i < SSL_PKEY_NUM; i++) {
270 CERT_PKEY *cpk = cert->pkeys + i;
271 CERT_PKEY *rpk = ret->pkeys + i;
272 if (cpk->x509 != NULL) {
273 rpk->x509 = cpk->x509;
274 CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
277 if (cpk->privatekey != NULL) {
278 rpk->privatekey = cpk->privatekey;
279 CRYPTO_add(&cpk->privatekey->references, 1, CRYPTO_LOCK_EVP_PKEY);
283 rpk->chain = X509_chain_up_ref(cpk->chain);
285 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
289 rpk->valid_flags = 0;
290 #ifndef OPENSSL_NO_TLSEXT
291 if (cert->pkeys[i].serverinfo != NULL) {
292 /* Just copy everything. */
293 ret->pkeys[i].serverinfo =
294 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
295 if (ret->pkeys[i].serverinfo == NULL) {
296 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
299 ret->pkeys[i].serverinfo_length =
300 cert->pkeys[i].serverinfo_length;
301 memcpy(ret->pkeys[i].serverinfo,
302 cert->pkeys[i].serverinfo,
303 cert->pkeys[i].serverinfo_length);
310 * Set digests to defaults. NB: we don't copy existing values as they
311 * will be set during handshake.
313 ssl_cert_set_default_md(ret);
314 /* Configured sigalgs copied across */
315 if (cert->conf_sigalgs) {
316 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
317 if (!ret->conf_sigalgs)
319 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
320 ret->conf_sigalgslen = cert->conf_sigalgslen;
322 ret->conf_sigalgs = NULL;
324 if (cert->client_sigalgs) {
325 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
326 if (!ret->client_sigalgs)
328 memcpy(ret->client_sigalgs, cert->client_sigalgs,
329 cert->client_sigalgslen);
330 ret->client_sigalgslen = cert->client_sigalgslen;
332 ret->client_sigalgs = NULL;
333 /* Shared sigalgs also NULL */
334 ret->shared_sigalgs = NULL;
335 /* Copy any custom client certificate types */
337 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
340 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
341 ret->ctype_num = cert->ctype_num;
344 ret->cert_flags = cert->cert_flags;
346 ret->cert_cb = cert->cert_cb;
347 ret->cert_cb_arg = cert->cert_cb_arg;
349 if (cert->verify_store) {
350 CRYPTO_add(&cert->verify_store->references, 1,
351 CRYPTO_LOCK_X509_STORE);
352 ret->verify_store = cert->verify_store;
355 if (cert->chain_store) {
356 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
357 ret->chain_store = cert->chain_store;
360 ret->sec_cb = cert->sec_cb;
361 ret->sec_level = cert->sec_level;
362 ret->sec_ex = cert->sec_ex;
364 #ifndef OPENSSL_NO_TLSEXT
365 if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
367 if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
379 /* Free up and clear all certificates and chains */
381 void ssl_cert_clear_certs(CERT *c)
386 for (i = 0; i < SSL_PKEY_NUM; i++) {
387 CERT_PKEY *cpk = c->pkeys + i;
388 X509_free(cpk->x509);
390 EVP_PKEY_free(cpk->privatekey);
391 cpk->privatekey = NULL;
392 sk_X509_pop_free(cpk->chain, X509_free);
394 #ifndef OPENSSL_NO_TLSEXT
395 OPENSSL_free(cpk->serverinfo);
396 cpk->serverinfo = NULL;
397 cpk->serverinfo_length = 0;
399 /* Clear all flags apart from explicit sign */
400 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
404 void ssl_cert_free(CERT *c)
411 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
413 REF_PRINT("CERT", c);
419 fprintf(stderr, "ssl_cert_free, bad reference count\n");
424 #ifndef OPENSSL_NO_RSA
425 RSA_free(c->rsa_tmp);
427 #ifndef OPENSSL_NO_DH
430 #ifndef OPENSSL_NO_EC
431 EC_KEY_free(c->ecdh_tmp);
434 ssl_cert_clear_certs(c);
435 OPENSSL_free(c->conf_sigalgs);
436 OPENSSL_free(c->client_sigalgs);
437 OPENSSL_free(c->shared_sigalgs);
438 OPENSSL_free(c->ctypes);
439 X509_STORE_free(c->verify_store);
440 X509_STORE_free(c->chain_store);
441 #ifndef OPENSSL_NO_TLSEXT
442 custom_exts_free(&c->cli_ext);
443 custom_exts_free(&c->srv_ext);
448 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
451 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
454 sk_X509_pop_free(cpk->chain, X509_free);
455 for (i = 0; i < sk_X509_num(chain); i++) {
456 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
458 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
466 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
468 STACK_OF(X509) *dchain;
470 return ssl_cert_set0_chain(s, ctx, NULL);
471 dchain = X509_chain_up_ref(chain);
474 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
475 sk_X509_pop_free(dchain, X509_free);
481 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
484 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
487 r = ssl_security_cert(s, ctx, x, 0, 0);
489 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
493 cpk->chain = sk_X509_new_null();
494 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
499 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
501 if (!ssl_cert_add0_chain_cert(s, ctx, x))
503 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
507 int ssl_cert_select_current(CERT *c, X509 *x)
512 for (i = 0; i < SSL_PKEY_NUM; i++) {
513 CERT_PKEY *cpk = c->pkeys + i;
514 if (cpk->x509 == x && cpk->privatekey) {
520 for (i = 0; i < SSL_PKEY_NUM; i++) {
521 CERT_PKEY *cpk = c->pkeys + i;
522 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
530 int ssl_cert_set_current(CERT *c, long op)
535 if (op == SSL_CERT_SET_FIRST)
537 else if (op == SSL_CERT_SET_NEXT) {
538 idx = (int)(c->key - c->pkeys + 1);
539 if (idx >= SSL_PKEY_NUM)
543 for (i = idx; i < SSL_PKEY_NUM; i++) {
544 CERT_PKEY *cpk = c->pkeys + i;
545 if (cpk->x509 && cpk->privatekey) {
553 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
556 c->cert_cb_arg = arg;
559 SESS_CERT *ssl_sess_cert_new(void)
563 ret = OPENSSL_malloc(sizeof(*ret));
565 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
569 memset(ret, 0, sizeof(*ret));
570 ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
576 void ssl_sess_cert_free(SESS_CERT *sc)
583 i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
585 REF_PRINT("SESS_CERT", sc);
591 fprintf(stderr, "ssl_sess_cert_free, bad reference count\n");
597 sk_X509_pop_free(sc->cert_chain, X509_free);
598 for (i = 0; i < SSL_PKEY_NUM; i++) {
599 X509_free(sc->peer_pkeys[i].x509);
602 * We don't have the peer's private key. This line is just
603 * here as a reminder that we're still using a not-quite-appropriate
606 EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
610 #ifndef OPENSSL_NO_RSA
611 RSA_free(sc->peer_rsa_tmp);
613 #ifndef OPENSSL_NO_DH
614 DH_free(sc->peer_dh_tmp);
616 #ifndef OPENSSL_NO_EC
617 EC_KEY_free(sc->peer_ecdh_tmp);
623 int ssl_set_peer_cert_type(SESS_CERT *sc, int type)
625 sc->peer_cert_type = type;
629 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
633 X509_STORE *verify_store;
636 if (s->cert->verify_store)
637 verify_store = s->cert->verify_store;
639 verify_store = s->ctx->cert_store;
641 if ((sk == NULL) || (sk_X509_num(sk) == 0))
644 x = sk_X509_value(sk, 0);
645 if (!X509_STORE_CTX_init(&ctx, verify_store, x, sk)) {
646 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
649 /* Set suite B flags if needed */
650 X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
651 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);
654 * We need to inherit the verify parameters. These can be determined by
655 * the context: if its a server it will verify SSL client certificates or
659 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server");
661 * Anything non-default in "param" should overwrite anything in the ctx.
663 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
665 if (s->verify_callback)
666 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
668 if (s->ctx->app_verify_callback != NULL)
669 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
671 i = X509_verify_cert(&ctx);
673 /* Dummy error calls so mkerr generates them */
674 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
675 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
676 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
679 i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
682 s->verify_result = ctx.error;
683 X509_STORE_CTX_cleanup(&ctx);
688 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
689 STACK_OF(X509_NAME) *name_list)
691 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
692 *ca_list = name_list;
695 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
698 STACK_OF(X509_NAME) *ret;
701 ret = sk_X509_NAME_new_null();
702 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
703 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
704 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) {
705 sk_X509_NAME_pop_free(ret, X509_NAME_free);
712 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
714 set_client_CA_list(&(s->client_CA), name_list);
717 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
719 set_client_CA_list(&(ctx->client_CA), name_list);
722 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
724 return (ctx->client_CA);
727 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
729 if (s->type == SSL_ST_CONNECT) { /* we are in the client */
730 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
731 return (s->s3->tmp.ca_names);
735 if (s->client_CA != NULL)
736 return (s->client_CA);
738 return (s->ctx->client_CA);
742 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
748 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
751 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
754 if (!sk_X509_NAME_push(*sk, name)) {
755 X509_NAME_free(name);
761 int SSL_add_client_CA(SSL *ssl, X509 *x)
763 return (add_client_CA(&(ssl->client_CA), x));
766 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
768 return (add_client_CA(&(ctx->client_CA), x));
771 static int xname_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
773 return (X509_NAME_cmp(*a, *b));
776 #ifndef OPENSSL_NO_STDIO
778 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
779 * it doesn't really have anything to do with clients (except that a common use
780 * for a stack of CAs is to send it to the client). Actually, it doesn't have
781 * much to do with CAs, either, since it will load any old cert.
782 * \param file the file containing one or more certs.
783 * \return a ::STACK containing the certs.
785 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
789 X509_NAME *xn = NULL;
790 STACK_OF(X509_NAME) *ret = NULL, *sk;
792 sk = sk_X509_NAME_new(xname_cmp);
794 in = BIO_new(BIO_s_file_internal());
796 if ((sk == NULL) || (in == NULL)) {
797 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
801 if (!BIO_read_filename(in, file))
805 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
808 ret = sk_X509_NAME_new_null();
810 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
814 if ((xn = X509_get_subject_name(x)) == NULL)
816 /* check for duplicates */
817 xn = X509_NAME_dup(xn);
820 if (sk_X509_NAME_find(sk, xn) >= 0)
823 sk_X509_NAME_push(sk, xn);
824 sk_X509_NAME_push(ret, xn);
830 sk_X509_NAME_pop_free(ret, X509_NAME_free);
833 sk_X509_NAME_free(sk);
843 * Add a file of certs to a stack.
844 * \param stack the stack to add to.
845 * \param file the file to add from. All certs in this file that are not
846 * already in the stack will be added.
847 * \return 1 for success, 0 for failure. Note that in the case of failure some
848 * certs may have been added to \c stack.
851 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
856 X509_NAME *xn = NULL;
858 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
860 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
862 in = BIO_new(BIO_s_file_internal());
865 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
866 ERR_R_MALLOC_FAILURE);
870 if (!BIO_read_filename(in, file))
874 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
876 if ((xn = X509_get_subject_name(x)) == NULL)
878 xn = X509_NAME_dup(xn);
881 if (sk_X509_NAME_find(stack, xn) >= 0)
884 sk_X509_NAME_push(stack, xn);
895 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
900 * Add a directory of certs to a stack.
901 * \param stack the stack to append to.
902 * \param dir the directory to append from. All files in this directory will be
903 * examined as potential certs. Any that are acceptable to
904 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
906 * \return 1 for success, 0 for failure. Note that in the case of failure some
907 * certs may have been added to \c stack.
910 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
913 OPENSSL_DIR_CTX *d = NULL;
914 const char *filename;
917 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
919 /* Note that a side effect is that the CAs will be sorted by name */
921 while ((filename = OPENSSL_DIR_read(&d, dir))) {
925 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
926 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
927 SSL_R_PATH_TOO_LONG);
930 #ifdef OPENSSL_SYS_VMS
931 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
933 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
935 if (r <= 0 || r >= (int)sizeof(buf))
937 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
942 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
943 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
944 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
953 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
957 /* Add a certificate to a BUF_MEM structure */
959 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
964 n = i2d_X509(x, NULL);
965 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
966 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
969 p = (unsigned char *)&(buf->data[*l]);
977 /* Add certificate chain to internal SSL BUF_MEM strcuture */
978 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
980 BUF_MEM *buf = s->init_buf;
984 STACK_OF(X509) *extra_certs;
985 X509_STORE *chain_store;
987 /* TLSv1 sends a chain with nothing in it, instead of an alert */
988 if (!BUF_MEM_grow_clean(buf, 10)) {
989 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
993 if (!cpk || !cpk->x509)
999 * If we have a certificate specific chain use it, else use parent ctx.
1002 extra_certs = cpk->chain;
1004 extra_certs = s->ctx->extra_certs;
1006 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1008 else if (s->cert->chain_store)
1009 chain_store = s->cert->chain_store;
1011 chain_store = s->ctx->cert_store;
1014 X509_STORE_CTX xs_ctx;
1016 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, x, NULL)) {
1017 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
1020 X509_verify_cert(&xs_ctx);
1021 /* Don't leave errors in the queue */
1023 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
1025 X509_STORE_CTX_cleanup(&xs_ctx);
1026 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1029 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
1030 x = sk_X509_value(xs_ctx.chain, i);
1032 if (!ssl_add_cert_to_buf(buf, l, x)) {
1033 X509_STORE_CTX_cleanup(&xs_ctx);
1037 X509_STORE_CTX_cleanup(&xs_ctx);
1039 i = ssl_security_cert_chain(s, extra_certs, x, 0);
1041 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1044 if (!ssl_add_cert_to_buf(buf, l, x))
1046 for (i = 0; i < sk_X509_num(extra_certs); i++) {
1047 x = sk_X509_value(extra_certs, i);
1048 if (!ssl_add_cert_to_buf(buf, l, x))
1055 /* Build a certificate chain for current certificate */
1056 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
1058 CERT *c = s ? s->cert : ctx->cert;
1059 CERT_PKEY *cpk = c->key;
1060 X509_STORE *chain_store = NULL;
1061 X509_STORE_CTX xs_ctx;
1062 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1065 unsigned long error;
1068 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1071 /* Rearranging and check the chain: add everything to a store */
1072 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
1073 chain_store = X509_STORE_new();
1076 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
1077 x = sk_X509_value(cpk->chain, i);
1078 if (!X509_STORE_add_cert(chain_store, x)) {
1079 error = ERR_peek_last_error();
1080 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1081 ERR_GET_REASON(error) !=
1082 X509_R_CERT_ALREADY_IN_HASH_TABLE)
1087 /* Add EE cert too: it might be self signed */
1088 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
1089 error = ERR_peek_last_error();
1090 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1091 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1097 chain_store = c->chain_store;
1099 chain_store = s->ctx->cert_store;
1101 chain_store = ctx->cert_store;
1103 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1104 untrusted = cpk->chain;
1107 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted)) {
1108 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1111 /* Set suite B flags if needed */
1112 X509_STORE_CTX_set_flags(&xs_ctx,
1113 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1115 i = X509_verify_cert(&xs_ctx);
1116 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
1117 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1123 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1125 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1126 i = X509_STORE_CTX_get_error(&xs_ctx);
1127 ERR_add_error_data(2, "Verify error:",
1128 X509_verify_cert_error_string(i));
1130 X509_STORE_CTX_cleanup(&xs_ctx);
1133 X509_STORE_CTX_cleanup(&xs_ctx);
1134 /* Remove EE certificate from chain */
1135 x = sk_X509_shift(chain);
1137 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
1138 if (sk_X509_num(chain) > 0) {
1139 /* See if last cert is self signed */
1140 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1141 X509_check_purpose(x, -1, 0);
1142 if (x->ex_flags & EXFLAG_SS) {
1143 x = sk_X509_pop(chain);
1149 * Check security level of all CA certificates: EE will have been checked
1152 for (i = 0; i < sk_X509_num(chain); i++) {
1153 x = sk_X509_value(chain, i);
1154 rv = ssl_security_cert(s, ctx, x, 0, 0);
1156 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1157 sk_X509_pop_free(chain, X509_free);
1162 sk_X509_pop_free(cpk->chain, X509_free);
1167 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1168 X509_STORE_free(chain_store);
1173 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1175 X509_STORE **pstore;
1177 pstore = &c->chain_store;
1179 pstore = &c->verify_store;
1180 X509_STORE_free(*pstore);
1183 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1187 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op,
1188 int bits, int nid, void *other,
1192 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1194 level = SSL_CTX_get_security_level(ctx);
1196 level = SSL_get_security_level(s);
1197 /* Level 0: anything goes */
1202 minbits = minbits_table[level - 1];
1204 case SSL_SECOP_CIPHER_SUPPORTED:
1205 case SSL_SECOP_CIPHER_SHARED:
1206 case SSL_SECOP_CIPHER_CHECK:
1208 const SSL_CIPHER *c = other;
1209 /* No ciphers below security level */
1212 /* No unauthenticated ciphersuites */
1213 if (c->algorithm_auth & SSL_aNULL)
1215 /* No MD5 mac ciphersuites */
1216 if (c->algorithm_mac & SSL_MD5)
1218 /* SHA1 HMAC is 160 bits of security */
1219 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1221 /* Level 2: no RC4 */
1222 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1224 /* Level 3: forward secure ciphersuites only */
1225 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1229 case SSL_SECOP_VERSION:
1230 /* SSLv3 not allowed on level 2 */
1231 if (nid <= SSL3_VERSION && level >= 2)
1233 /* TLS v1.1 and above only for level 3 */
1234 if (nid <= TLS1_VERSION && level >= 3)
1236 /* TLS v1.2 only for level 4 and above */
1237 if (nid <= TLS1_1_VERSION && level >= 4)
1241 case SSL_SECOP_COMPRESSION:
1245 case SSL_SECOP_TICKET:
1256 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1258 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1261 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1263 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,