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_malloc(sizeof(*ret));
173 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
176 memset(ret, 0, sizeof(*ret));
178 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
180 ret->sec_cb = ssl_security_default_callback;
181 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
186 CERT *ssl_cert_dup(CERT *cert)
188 CERT *ret = OPENSSL_malloc(sizeof(*ret));
192 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
196 memset(ret, 0, sizeof(*ret));
198 ret->key = &ret->pkeys[cert->key - cert->pkeys];
200 #ifndef OPENSSL_NO_RSA
201 if (cert->rsa_tmp != NULL) {
202 RSA_up_ref(cert->rsa_tmp);
203 ret->rsa_tmp = cert->rsa_tmp;
205 ret->rsa_tmp_cb = cert->rsa_tmp_cb;
208 #ifndef OPENSSL_NO_DH
209 if (cert->dh_tmp != NULL) {
210 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
211 if (ret->dh_tmp == NULL) {
212 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
215 if (cert->dh_tmp->priv_key) {
216 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
218 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
221 ret->dh_tmp->priv_key = b;
223 if (cert->dh_tmp->pub_key) {
224 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
226 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
229 ret->dh_tmp->pub_key = b;
232 ret->dh_tmp_cb = cert->dh_tmp_cb;
233 ret->dh_tmp_auto = cert->dh_tmp_auto;
236 #ifndef OPENSSL_NO_EC
237 if (cert->ecdh_tmp) {
238 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
239 if (ret->ecdh_tmp == NULL) {
240 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
244 ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
245 ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
248 for (i = 0; i < SSL_PKEY_NUM; i++) {
249 CERT_PKEY *cpk = cert->pkeys + i;
250 CERT_PKEY *rpk = ret->pkeys + i;
251 if (cpk->x509 != NULL) {
252 rpk->x509 = cpk->x509;
253 CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
256 if (cpk->privatekey != NULL) {
257 rpk->privatekey = cpk->privatekey;
258 CRYPTO_add(&cpk->privatekey->references, 1, CRYPTO_LOCK_EVP_PKEY);
262 rpk->chain = X509_chain_up_ref(cpk->chain);
264 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
268 if (cert->pkeys[i].serverinfo != NULL) {
269 /* Just copy everything. */
270 ret->pkeys[i].serverinfo =
271 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
272 if (ret->pkeys[i].serverinfo == NULL) {
273 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
276 ret->pkeys[i].serverinfo_length =
277 cert->pkeys[i].serverinfo_length;
278 memcpy(ret->pkeys[i].serverinfo,
279 cert->pkeys[i].serverinfo,
280 cert->pkeys[i].serverinfo_length);
285 /* Configured sigalgs copied across */
286 if (cert->conf_sigalgs) {
287 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
288 if (!ret->conf_sigalgs)
290 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
291 ret->conf_sigalgslen = cert->conf_sigalgslen;
293 ret->conf_sigalgs = NULL;
295 if (cert->client_sigalgs) {
296 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
297 if (!ret->client_sigalgs)
299 memcpy(ret->client_sigalgs, cert->client_sigalgs,
300 cert->client_sigalgslen);
301 ret->client_sigalgslen = cert->client_sigalgslen;
303 ret->client_sigalgs = NULL;
304 /* Shared sigalgs also NULL */
305 ret->shared_sigalgs = NULL;
306 /* Copy any custom client certificate types */
308 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
311 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
312 ret->ctype_num = cert->ctype_num;
315 ret->cert_flags = cert->cert_flags;
317 ret->cert_cb = cert->cert_cb;
318 ret->cert_cb_arg = cert->cert_cb_arg;
320 if (cert->verify_store) {
321 CRYPTO_add(&cert->verify_store->references, 1,
322 CRYPTO_LOCK_X509_STORE);
323 ret->verify_store = cert->verify_store;
326 if (cert->chain_store) {
327 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
328 ret->chain_store = cert->chain_store;
331 ret->sec_cb = cert->sec_cb;
332 ret->sec_level = cert->sec_level;
333 ret->sec_ex = cert->sec_ex;
335 if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
337 if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
348 /* Free up and clear all certificates and chains */
350 void ssl_cert_clear_certs(CERT *c)
355 for (i = 0; i < SSL_PKEY_NUM; i++) {
356 CERT_PKEY *cpk = c->pkeys + i;
357 X509_free(cpk->x509);
359 EVP_PKEY_free(cpk->privatekey);
360 cpk->privatekey = NULL;
361 sk_X509_pop_free(cpk->chain, X509_free);
363 OPENSSL_free(cpk->serverinfo);
364 cpk->serverinfo = NULL;
365 cpk->serverinfo_length = 0;
369 void ssl_cert_free(CERT *c)
376 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
378 REF_PRINT("CERT", c);
384 fprintf(stderr, "ssl_cert_free, bad reference count\n");
389 #ifndef OPENSSL_NO_RSA
390 RSA_free(c->rsa_tmp);
392 #ifndef OPENSSL_NO_DH
395 #ifndef OPENSSL_NO_EC
396 EC_KEY_free(c->ecdh_tmp);
399 ssl_cert_clear_certs(c);
400 OPENSSL_free(c->conf_sigalgs);
401 OPENSSL_free(c->client_sigalgs);
402 OPENSSL_free(c->shared_sigalgs);
403 OPENSSL_free(c->ctypes);
404 X509_STORE_free(c->verify_store);
405 X509_STORE_free(c->chain_store);
406 custom_exts_free(&c->cli_ext);
407 custom_exts_free(&c->srv_ext);
411 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
414 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
417 sk_X509_pop_free(cpk->chain, X509_free);
418 for (i = 0; i < sk_X509_num(chain); i++) {
419 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
421 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
429 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
431 STACK_OF(X509) *dchain;
433 return ssl_cert_set0_chain(s, ctx, NULL);
434 dchain = X509_chain_up_ref(chain);
437 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
438 sk_X509_pop_free(dchain, X509_free);
444 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
447 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
450 r = ssl_security_cert(s, ctx, x, 0, 0);
452 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
456 cpk->chain = sk_X509_new_null();
457 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
462 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
464 if (!ssl_cert_add0_chain_cert(s, ctx, x))
466 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
470 int ssl_cert_select_current(CERT *c, X509 *x)
475 for (i = 0; i < SSL_PKEY_NUM; i++) {
476 CERT_PKEY *cpk = c->pkeys + i;
477 if (cpk->x509 == x && cpk->privatekey) {
483 for (i = 0; i < SSL_PKEY_NUM; i++) {
484 CERT_PKEY *cpk = c->pkeys + i;
485 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
493 int ssl_cert_set_current(CERT *c, long op)
498 if (op == SSL_CERT_SET_FIRST)
500 else if (op == SSL_CERT_SET_NEXT) {
501 idx = (int)(c->key - c->pkeys + 1);
502 if (idx >= SSL_PKEY_NUM)
506 for (i = idx; i < SSL_PKEY_NUM; i++) {
507 CERT_PKEY *cpk = c->pkeys + i;
508 if (cpk->x509 && cpk->privatekey) {
516 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
519 c->cert_cb_arg = arg;
522 SESS_CERT *ssl_sess_cert_new(void)
526 ret = OPENSSL_malloc(sizeof(*ret));
528 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
532 memset(ret, 0, sizeof(*ret));
533 ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
539 void ssl_sess_cert_free(SESS_CERT *sc)
546 i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
548 REF_PRINT("SESS_CERT", sc);
554 fprintf(stderr, "ssl_sess_cert_free, bad reference count\n");
560 sk_X509_pop_free(sc->cert_chain, X509_free);
561 for (i = 0; i < SSL_PKEY_NUM; i++) {
562 X509_free(sc->peer_pkeys[i].x509);
565 * We don't have the peer's private key. This line is just
566 * here as a reminder that we're still using a not-quite-appropriate
569 EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
573 #ifndef OPENSSL_NO_RSA
574 RSA_free(sc->peer_rsa_tmp);
576 #ifndef OPENSSL_NO_DH
577 DH_free(sc->peer_dh_tmp);
579 #ifndef OPENSSL_NO_EC
580 EC_KEY_free(sc->peer_ecdh_tmp);
586 int ssl_set_peer_cert_type(SESS_CERT *sc, int type)
588 sc->peer_cert_type = type;
592 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
596 X509_STORE *verify_store;
599 if (s->cert->verify_store)
600 verify_store = s->cert->verify_store;
602 verify_store = s->ctx->cert_store;
604 if ((sk == NULL) || (sk_X509_num(sk) == 0))
607 x = sk_X509_value(sk, 0);
608 if (!X509_STORE_CTX_init(&ctx, verify_store, x, sk)) {
609 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
612 /* Set suite B flags if needed */
613 X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
614 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);
617 * We need to inherit the verify parameters. These can be determined by
618 * the context: if its a server it will verify SSL client certificates or
622 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server");
624 * Anything non-default in "param" should overwrite anything in the ctx.
626 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
628 if (s->verify_callback)
629 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
631 if (s->ctx->app_verify_callback != NULL)
632 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
634 i = X509_verify_cert(&ctx);
636 /* Dummy error calls so mkerr generates them */
637 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
638 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
639 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
642 i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
645 s->verify_result = ctx.error;
646 X509_STORE_CTX_cleanup(&ctx);
651 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
652 STACK_OF(X509_NAME) *name_list)
654 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
655 *ca_list = name_list;
658 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
661 STACK_OF(X509_NAME) *ret;
664 ret = sk_X509_NAME_new_null();
665 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
666 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
667 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) {
668 sk_X509_NAME_pop_free(ret, X509_NAME_free);
675 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
677 set_client_CA_list(&(s->client_CA), name_list);
680 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
682 set_client_CA_list(&(ctx->client_CA), name_list);
685 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
687 return (ctx->client_CA);
690 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
692 if (s->type == SSL_ST_CONNECT) { /* we are in the client */
693 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
694 return (s->s3->tmp.ca_names);
698 if (s->client_CA != NULL)
699 return (s->client_CA);
701 return (s->ctx->client_CA);
705 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
711 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
714 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
717 if (!sk_X509_NAME_push(*sk, name)) {
718 X509_NAME_free(name);
724 int SSL_add_client_CA(SSL *ssl, X509 *x)
726 return (add_client_CA(&(ssl->client_CA), x));
729 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
731 return (add_client_CA(&(ctx->client_CA), x));
734 static int xname_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
736 return (X509_NAME_cmp(*a, *b));
739 #ifndef OPENSSL_NO_STDIO
741 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
742 * it doesn't really have anything to do with clients (except that a common use
743 * for a stack of CAs is to send it to the client). Actually, it doesn't have
744 * much to do with CAs, either, since it will load any old cert.
745 * \param file the file containing one or more certs.
746 * \return a ::STACK containing the certs.
748 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
752 X509_NAME *xn = NULL;
753 STACK_OF(X509_NAME) *ret = NULL, *sk;
755 sk = sk_X509_NAME_new(xname_cmp);
757 in = BIO_new(BIO_s_file_internal());
759 if ((sk == NULL) || (in == NULL)) {
760 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
764 if (!BIO_read_filename(in, file))
768 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
771 ret = sk_X509_NAME_new_null();
773 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
777 if ((xn = X509_get_subject_name(x)) == NULL)
779 /* check for duplicates */
780 xn = X509_NAME_dup(xn);
783 if (sk_X509_NAME_find(sk, xn) >= 0)
786 sk_X509_NAME_push(sk, xn);
787 sk_X509_NAME_push(ret, xn);
793 sk_X509_NAME_pop_free(ret, X509_NAME_free);
796 sk_X509_NAME_free(sk);
806 * Add a file of certs to a stack.
807 * \param stack the stack to add to.
808 * \param file the file to add from. All certs in this file that are not
809 * already in the stack will be added.
810 * \return 1 for success, 0 for failure. Note that in the case of failure some
811 * certs may have been added to \c stack.
814 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
819 X509_NAME *xn = NULL;
821 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
823 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
825 in = BIO_new(BIO_s_file_internal());
828 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
829 ERR_R_MALLOC_FAILURE);
833 if (!BIO_read_filename(in, file))
837 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
839 if ((xn = X509_get_subject_name(x)) == NULL)
841 xn = X509_NAME_dup(xn);
844 if (sk_X509_NAME_find(stack, xn) >= 0)
847 sk_X509_NAME_push(stack, xn);
858 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
863 * Add a directory of certs to a stack.
864 * \param stack the stack to append to.
865 * \param dir the directory to append from. All files in this directory will be
866 * examined as potential certs. Any that are acceptable to
867 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
869 * \return 1 for success, 0 for failure. Note that in the case of failure some
870 * certs may have been added to \c stack.
873 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
876 OPENSSL_DIR_CTX *d = NULL;
877 const char *filename;
880 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
882 /* Note that a side effect is that the CAs will be sorted by name */
884 while ((filename = OPENSSL_DIR_read(&d, dir))) {
888 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
889 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
890 SSL_R_PATH_TOO_LONG);
893 #ifdef OPENSSL_SYS_VMS
894 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
896 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
898 if (r <= 0 || r >= (int)sizeof(buf))
900 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
905 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
906 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
907 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
916 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
920 /* Add a certificate to a BUF_MEM structure */
922 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
927 n = i2d_X509(x, NULL);
928 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
929 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
932 p = (unsigned char *)&(buf->data[*l]);
940 /* Add certificate chain to internal SSL BUF_MEM strcuture */
941 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
943 BUF_MEM *buf = s->init_buf;
947 STACK_OF(X509) *extra_certs;
948 X509_STORE *chain_store;
950 /* TLSv1 sends a chain with nothing in it, instead of an alert */
951 if (!BUF_MEM_grow_clean(buf, 10)) {
952 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
956 if (!cpk || !cpk->x509)
962 * If we have a certificate specific chain use it, else use parent ctx.
965 extra_certs = cpk->chain;
967 extra_certs = s->ctx->extra_certs;
969 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
971 else if (s->cert->chain_store)
972 chain_store = s->cert->chain_store;
974 chain_store = s->ctx->cert_store;
977 X509_STORE_CTX xs_ctx;
979 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, x, NULL)) {
980 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
983 X509_verify_cert(&xs_ctx);
984 /* Don't leave errors in the queue */
986 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
988 X509_STORE_CTX_cleanup(&xs_ctx);
989 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
992 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
993 x = sk_X509_value(xs_ctx.chain, i);
995 if (!ssl_add_cert_to_buf(buf, l, x)) {
996 X509_STORE_CTX_cleanup(&xs_ctx);
1000 X509_STORE_CTX_cleanup(&xs_ctx);
1002 i = ssl_security_cert_chain(s, extra_certs, x, 0);
1004 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1007 if (!ssl_add_cert_to_buf(buf, l, x))
1009 for (i = 0; i < sk_X509_num(extra_certs); i++) {
1010 x = sk_X509_value(extra_certs, i);
1011 if (!ssl_add_cert_to_buf(buf, l, x))
1018 /* Build a certificate chain for current certificate */
1019 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
1021 CERT *c = s ? s->cert : ctx->cert;
1022 CERT_PKEY *cpk = c->key;
1023 X509_STORE *chain_store = NULL;
1024 X509_STORE_CTX xs_ctx;
1025 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1028 unsigned long error;
1031 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1034 /* Rearranging and check the chain: add everything to a store */
1035 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
1036 chain_store = X509_STORE_new();
1039 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
1040 x = sk_X509_value(cpk->chain, i);
1041 if (!X509_STORE_add_cert(chain_store, x)) {
1042 error = ERR_peek_last_error();
1043 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1044 ERR_GET_REASON(error) !=
1045 X509_R_CERT_ALREADY_IN_HASH_TABLE)
1050 /* Add EE cert too: it might be self signed */
1051 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
1052 error = ERR_peek_last_error();
1053 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1054 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1060 chain_store = c->chain_store;
1062 chain_store = s->ctx->cert_store;
1064 chain_store = ctx->cert_store;
1066 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1067 untrusted = cpk->chain;
1070 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted)) {
1071 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1074 /* Set suite B flags if needed */
1075 X509_STORE_CTX_set_flags(&xs_ctx,
1076 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1078 i = X509_verify_cert(&xs_ctx);
1079 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
1080 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1086 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1088 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1089 i = X509_STORE_CTX_get_error(&xs_ctx);
1090 ERR_add_error_data(2, "Verify error:",
1091 X509_verify_cert_error_string(i));
1093 X509_STORE_CTX_cleanup(&xs_ctx);
1096 X509_STORE_CTX_cleanup(&xs_ctx);
1097 /* Remove EE certificate from chain */
1098 x = sk_X509_shift(chain);
1100 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
1101 if (sk_X509_num(chain) > 0) {
1102 /* See if last cert is self signed */
1103 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1104 X509_check_purpose(x, -1, 0);
1105 if (x->ex_flags & EXFLAG_SS) {
1106 x = sk_X509_pop(chain);
1112 * Check security level of all CA certificates: EE will have been checked
1115 for (i = 0; i < sk_X509_num(chain); i++) {
1116 x = sk_X509_value(chain, i);
1117 rv = ssl_security_cert(s, ctx, x, 0, 0);
1119 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1120 sk_X509_pop_free(chain, X509_free);
1125 sk_X509_pop_free(cpk->chain, X509_free);
1130 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1131 X509_STORE_free(chain_store);
1136 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1138 X509_STORE **pstore;
1140 pstore = &c->chain_store;
1142 pstore = &c->verify_store;
1143 X509_STORE_free(*pstore);
1146 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1150 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op,
1151 int bits, int nid, void *other,
1155 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1157 level = SSL_CTX_get_security_level(ctx);
1159 level = SSL_get_security_level(s);
1160 /* Level 0: anything goes */
1165 minbits = minbits_table[level - 1];
1167 case SSL_SECOP_CIPHER_SUPPORTED:
1168 case SSL_SECOP_CIPHER_SHARED:
1169 case SSL_SECOP_CIPHER_CHECK:
1171 const SSL_CIPHER *c = other;
1172 /* No ciphers below security level */
1175 /* No unauthenticated ciphersuites */
1176 if (c->algorithm_auth & SSL_aNULL)
1178 /* No MD5 mac ciphersuites */
1179 if (c->algorithm_mac & SSL_MD5)
1181 /* SHA1 HMAC is 160 bits of security */
1182 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1184 /* Level 2: no RC4 */
1185 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1187 /* Level 3: forward secure ciphersuites only */
1188 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1192 case SSL_SECOP_VERSION:
1193 /* SSLv3 not allowed on level 2 */
1194 if (nid <= SSL3_VERSION && level >= 2)
1196 /* TLS v1.1 and above only for level 3 */
1197 if (nid <= TLS1_VERSION && level >= 3)
1199 /* TLS v1.2 only for level 4 and above */
1200 if (nid <= TLS1_1_VERSION && level >= 4)
1204 case SSL_SECOP_COMPRESSION:
1208 case SSL_SECOP_TICKET:
1219 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1221 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1224 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1226 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,