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 = cert->dh_tmp;
201 EVP_PKEY_up_ref(ret->dh_tmp);
203 ret->dh_tmp_cb = cert->dh_tmp_cb;
204 ret->dh_tmp_auto = cert->dh_tmp_auto;
207 for (i = 0; i < SSL_PKEY_NUM; i++) {
208 CERT_PKEY *cpk = cert->pkeys + i;
209 CERT_PKEY *rpk = ret->pkeys + i;
210 if (cpk->x509 != NULL) {
211 rpk->x509 = cpk->x509;
212 X509_up_ref(rpk->x509);
215 if (cpk->privatekey != NULL) {
216 rpk->privatekey = cpk->privatekey;
217 EVP_PKEY_up_ref(cpk->privatekey);
221 rpk->chain = X509_chain_up_ref(cpk->chain);
223 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
227 if (cert->pkeys[i].serverinfo != NULL) {
228 /* Just copy everything. */
229 ret->pkeys[i].serverinfo =
230 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
231 if (ret->pkeys[i].serverinfo == NULL) {
232 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
235 ret->pkeys[i].serverinfo_length =
236 cert->pkeys[i].serverinfo_length;
237 memcpy(ret->pkeys[i].serverinfo,
238 cert->pkeys[i].serverinfo,
239 cert->pkeys[i].serverinfo_length);
243 /* Configured sigalgs copied across */
244 if (cert->conf_sigalgs) {
245 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
246 if (ret->conf_sigalgs == NULL)
248 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
249 ret->conf_sigalgslen = cert->conf_sigalgslen;
251 ret->conf_sigalgs = NULL;
253 if (cert->client_sigalgs) {
254 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
255 if (ret->client_sigalgs == NULL)
257 memcpy(ret->client_sigalgs, cert->client_sigalgs,
258 cert->client_sigalgslen);
259 ret->client_sigalgslen = cert->client_sigalgslen;
261 ret->client_sigalgs = NULL;
262 /* Shared sigalgs also NULL */
263 ret->shared_sigalgs = NULL;
264 /* Copy any custom client certificate types */
266 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
267 if (ret->ctypes == NULL)
269 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
270 ret->ctype_num = cert->ctype_num;
273 ret->cert_flags = cert->cert_flags;
275 ret->cert_cb = cert->cert_cb;
276 ret->cert_cb_arg = cert->cert_cb_arg;
278 if (cert->verify_store) {
279 CRYPTO_add(&cert->verify_store->references, 1,
280 CRYPTO_LOCK_X509_STORE);
281 ret->verify_store = cert->verify_store;
284 if (cert->chain_store) {
285 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
286 ret->chain_store = cert->chain_store;
289 ret->sec_cb = cert->sec_cb;
290 ret->sec_level = cert->sec_level;
291 ret->sec_ex = cert->sec_ex;
293 if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
295 if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
297 #ifndef OPENSSL_NO_PSK
298 if (cert->psk_identity_hint) {
299 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint);
300 if (ret->psk_identity_hint == NULL)
312 /* Free up and clear all certificates and chains */
314 void ssl_cert_clear_certs(CERT *c)
319 for (i = 0; i < SSL_PKEY_NUM; i++) {
320 CERT_PKEY *cpk = c->pkeys + i;
321 X509_free(cpk->x509);
323 EVP_PKEY_free(cpk->privatekey);
324 cpk->privatekey = NULL;
325 sk_X509_pop_free(cpk->chain, X509_free);
327 OPENSSL_free(cpk->serverinfo);
328 cpk->serverinfo = NULL;
329 cpk->serverinfo_length = 0;
333 void ssl_cert_free(CERT *c)
340 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
342 REF_PRINT("CERT", c);
348 fprintf(stderr, "ssl_cert_free, bad reference count\n");
353 #ifndef OPENSSL_NO_DH
354 EVP_PKEY_free(c->dh_tmp);
357 ssl_cert_clear_certs(c);
358 OPENSSL_free(c->conf_sigalgs);
359 OPENSSL_free(c->client_sigalgs);
360 OPENSSL_free(c->shared_sigalgs);
361 OPENSSL_free(c->ctypes);
362 X509_STORE_free(c->verify_store);
363 X509_STORE_free(c->chain_store);
364 custom_exts_free(&c->cli_ext);
365 custom_exts_free(&c->srv_ext);
366 #ifndef OPENSSL_NO_PSK
367 OPENSSL_free(c->psk_identity_hint);
372 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
375 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
378 sk_X509_pop_free(cpk->chain, X509_free);
379 for (i = 0; i < sk_X509_num(chain); i++) {
380 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
382 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
390 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
392 STACK_OF(X509) *dchain;
394 return ssl_cert_set0_chain(s, ctx, NULL);
395 dchain = X509_chain_up_ref(chain);
398 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
399 sk_X509_pop_free(dchain, X509_free);
405 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
408 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
411 r = ssl_security_cert(s, ctx, x, 0, 0);
413 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
417 cpk->chain = sk_X509_new_null();
418 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
423 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
425 if (!ssl_cert_add0_chain_cert(s, ctx, x))
431 int ssl_cert_select_current(CERT *c, X509 *x)
436 for (i = 0; i < SSL_PKEY_NUM; i++) {
437 CERT_PKEY *cpk = c->pkeys + i;
438 if (cpk->x509 == x && cpk->privatekey) {
444 for (i = 0; i < SSL_PKEY_NUM; i++) {
445 CERT_PKEY *cpk = c->pkeys + i;
446 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
454 int ssl_cert_set_current(CERT *c, long op)
459 if (op == SSL_CERT_SET_FIRST)
461 else if (op == SSL_CERT_SET_NEXT) {
462 idx = (int)(c->key - c->pkeys + 1);
463 if (idx >= SSL_PKEY_NUM)
467 for (i = idx; i < SSL_PKEY_NUM; i++) {
468 CERT_PKEY *cpk = c->pkeys + i;
469 if (cpk->x509 && cpk->privatekey) {
477 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
480 c->cert_cb_arg = arg;
483 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
487 X509_STORE *verify_store;
489 X509_VERIFY_PARAM *param;
491 if (s->cert->verify_store)
492 verify_store = s->cert->verify_store;
494 verify_store = s->ctx->cert_store;
496 if ((sk == NULL) || (sk_X509_num(sk) == 0))
499 x = sk_X509_value(sk, 0);
500 if (!X509_STORE_CTX_init(&ctx, verify_store, x, sk)) {
501 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
504 param = X509_STORE_CTX_get0_param(&ctx);
506 /* Set suite B flags if needed */
507 X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
508 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);
510 /* Verify via DANE if enabled */
511 if (DANETLS_ENABLED(&s->dane))
512 X509_STORE_CTX_set0_dane(&ctx, &s->dane);
515 * We need to inherit the verify parameters. These can be determined by
516 * the context: if its a server it will verify SSL client certificates or
520 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server");
522 * Anything non-default in "s->param" should overwrite anything in the ctx.
524 X509_VERIFY_PARAM_set1(param, s->param);
526 if (s->verify_callback)
527 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
529 if (s->ctx->app_verify_callback != NULL)
530 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
532 i = X509_verify_cert(&ctx);
534 /* Dummy error calls so mkerr generates them */
535 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
536 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
537 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
540 i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
543 s->verify_result = ctx.error;
544 sk_X509_pop_free(s->verified_chain, X509_free);
545 s->verified_chain = NULL;
546 if (X509_STORE_CTX_get_chain(&ctx) != NULL) {
547 s->verified_chain = X509_STORE_CTX_get1_chain(&ctx);
548 if (s->verified_chain == NULL) {
549 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
554 /* Move peername from the store context params to the SSL handle's */
555 X509_VERIFY_PARAM_move_peername(s->param, param);
557 X509_STORE_CTX_cleanup(&ctx);
562 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
563 STACK_OF(X509_NAME) *name_list)
565 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
566 *ca_list = name_list;
569 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
572 STACK_OF(X509_NAME) *ret;
575 ret = sk_X509_NAME_new_null();
576 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
577 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
578 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) {
579 sk_X509_NAME_pop_free(ret, X509_NAME_free);
586 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
588 set_client_CA_list(&(s->client_CA), name_list);
591 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
593 set_client_CA_list(&(ctx->client_CA), name_list);
596 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
598 return (ctx->client_CA);
601 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
603 if (!s->server) { /* we are in the client */
604 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
605 return (s->s3->tmp.ca_names);
609 if (s->client_CA != NULL)
610 return (s->client_CA);
612 return (s->ctx->client_CA);
616 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
622 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
625 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
628 if (!sk_X509_NAME_push(*sk, name)) {
629 X509_NAME_free(name);
635 int SSL_add_client_CA(SSL *ssl, X509 *x)
637 return (add_client_CA(&(ssl->client_CA), x));
640 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
642 return (add_client_CA(&(ctx->client_CA), x));
645 static int xname_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
647 return (X509_NAME_cmp(*a, *b));
651 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
652 * it doesn't really have anything to do with clients (except that a common use
653 * for a stack of CAs is to send it to the client). Actually, it doesn't have
654 * much to do with CAs, either, since it will load any old cert.
655 * \param file the file containing one or more certs.
656 * \return a ::STACK containing the certs.
658 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
662 X509_NAME *xn = NULL;
663 STACK_OF(X509_NAME) *ret = NULL, *sk;
665 sk = sk_X509_NAME_new(xname_cmp);
667 in = BIO_new(BIO_s_file());
669 if ((sk == NULL) || (in == NULL)) {
670 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
674 if (!BIO_read_filename(in, file))
678 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
681 ret = sk_X509_NAME_new_null();
683 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
687 if ((xn = X509_get_subject_name(x)) == NULL)
689 /* check for duplicates */
690 xn = X509_NAME_dup(xn);
693 if (sk_X509_NAME_find(sk, xn) >= 0)
696 sk_X509_NAME_push(sk, xn);
697 sk_X509_NAME_push(ret, xn);
703 sk_X509_NAME_pop_free(ret, X509_NAME_free);
706 sk_X509_NAME_free(sk);
715 * Add a file of certs to a stack.
716 * \param stack the stack to add to.
717 * \param file the file to add from. All certs in this file that are not
718 * already in the stack will be added.
719 * \return 1 for success, 0 for failure. Note that in the case of failure some
720 * certs may have been added to \c stack.
723 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
728 X509_NAME *xn = NULL;
730 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
732 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
734 in = BIO_new(BIO_s_file());
737 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
738 ERR_R_MALLOC_FAILURE);
742 if (!BIO_read_filename(in, file))
746 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
748 if ((xn = X509_get_subject_name(x)) == NULL)
750 xn = X509_NAME_dup(xn);
753 if (sk_X509_NAME_find(stack, xn) >= 0)
756 sk_X509_NAME_push(stack, xn);
767 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
772 * Add a directory of certs to a stack.
773 * \param stack the stack to append to.
774 * \param dir the directory to append from. All files in this directory will be
775 * examined as potential certs. Any that are acceptable to
776 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
778 * \return 1 for success, 0 for failure. Note that in the case of failure some
779 * certs may have been added to \c stack.
782 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
785 OPENSSL_DIR_CTX *d = NULL;
786 const char *filename;
789 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
791 /* Note that a side effect is that the CAs will be sorted by name */
793 while ((filename = OPENSSL_DIR_read(&d, dir))) {
797 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
798 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
799 SSL_R_PATH_TOO_LONG);
802 #ifdef OPENSSL_SYS_VMS
803 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
805 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
807 if (r <= 0 || r >= (int)sizeof(buf))
809 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
814 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
815 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
816 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
825 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
829 /* Add a certificate to a BUF_MEM structure */
831 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
836 n = i2d_X509(x, NULL);
837 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
838 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
841 p = (unsigned char *)&(buf->data[*l]);
849 /* Add certificate chain to internal SSL BUF_MEM strcuture */
850 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
852 BUF_MEM *buf = s->init_buf;
856 STACK_OF(X509) *extra_certs;
857 X509_STORE *chain_store;
859 /* TLSv1 sends a chain with nothing in it, instead of an alert */
860 if (!BUF_MEM_grow_clean(buf, 10)) {
861 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
865 if (!cpk || !cpk->x509)
871 * If we have a certificate specific chain use it, else use parent ctx.
874 extra_certs = cpk->chain;
876 extra_certs = s->ctx->extra_certs;
878 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
880 else if (s->cert->chain_store)
881 chain_store = s->cert->chain_store;
883 chain_store = s->ctx->cert_store;
886 X509_STORE_CTX xs_ctx;
888 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, x, NULL)) {
889 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
893 * It is valid for the chain not to be complete (because normally we
894 * don't include the root cert in the chain). Therefore we deliberately
895 * ignore the error return from this call. We're not actually verifying
896 * the cert - we're just building as much of the chain as we can
898 X509_verify_cert(&xs_ctx);
899 /* Don't leave errors in the queue */
901 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
903 X509_STORE_CTX_cleanup(&xs_ctx);
904 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
907 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
908 x = sk_X509_value(xs_ctx.chain, i);
910 if (!ssl_add_cert_to_buf(buf, l, x)) {
911 X509_STORE_CTX_cleanup(&xs_ctx);
915 X509_STORE_CTX_cleanup(&xs_ctx);
917 i = ssl_security_cert_chain(s, extra_certs, x, 0);
919 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
922 if (!ssl_add_cert_to_buf(buf, l, x))
924 for (i = 0; i < sk_X509_num(extra_certs); i++) {
925 x = sk_X509_value(extra_certs, i);
926 if (!ssl_add_cert_to_buf(buf, l, x))
933 /* Build a certificate chain for current certificate */
934 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
936 CERT *c = s ? s->cert : ctx->cert;
937 CERT_PKEY *cpk = c->key;
938 X509_STORE *chain_store = NULL;
939 X509_STORE_CTX xs_ctx;
940 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
946 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
949 /* Rearranging and check the chain: add everything to a store */
950 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
951 chain_store = X509_STORE_new();
952 if (chain_store == NULL)
954 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
955 x = sk_X509_value(cpk->chain, i);
956 if (!X509_STORE_add_cert(chain_store, x)) {
957 error = ERR_peek_last_error();
958 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
959 ERR_GET_REASON(error) !=
960 X509_R_CERT_ALREADY_IN_HASH_TABLE)
965 /* Add EE cert too: it might be self signed */
966 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
967 error = ERR_peek_last_error();
968 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
969 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
975 chain_store = c->chain_store;
977 chain_store = s->ctx->cert_store;
979 chain_store = ctx->cert_store;
981 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
982 untrusted = cpk->chain;
985 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted)) {
986 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
989 /* Set suite B flags if needed */
990 X509_STORE_CTX_set_flags(&xs_ctx,
991 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
993 i = X509_verify_cert(&xs_ctx);
994 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
995 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1001 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1003 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1004 i = X509_STORE_CTX_get_error(&xs_ctx);
1005 ERR_add_error_data(2, "Verify error:",
1006 X509_verify_cert_error_string(i));
1008 X509_STORE_CTX_cleanup(&xs_ctx);
1011 X509_STORE_CTX_cleanup(&xs_ctx);
1012 /* Remove EE certificate from chain */
1013 x = sk_X509_shift(chain);
1015 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
1016 if (sk_X509_num(chain) > 0) {
1017 /* See if last cert is self signed */
1018 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1019 if (X509_get_extension_flags(x) & EXFLAG_SS) {
1020 x = sk_X509_pop(chain);
1026 * Check security level of all CA certificates: EE will have been checked
1029 for (i = 0; i < sk_X509_num(chain); i++) {
1030 x = sk_X509_value(chain, i);
1031 rv = ssl_security_cert(s, ctx, x, 0, 0);
1033 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1034 sk_X509_pop_free(chain, X509_free);
1039 sk_X509_pop_free(cpk->chain, X509_free);
1044 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1045 X509_STORE_free(chain_store);
1050 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1052 X509_STORE **pstore;
1054 pstore = &c->chain_store;
1056 pstore = &c->verify_store;
1057 X509_STORE_free(*pstore);
1060 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1064 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op,
1065 int bits, int nid, void *other,
1069 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1071 level = SSL_CTX_get_security_level(ctx);
1073 level = SSL_get_security_level(s);
1077 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1080 if (op == SSL_SECOP_TMP_DH && bits < 80)
1086 minbits = minbits_table[level - 1];
1088 case SSL_SECOP_CIPHER_SUPPORTED:
1089 case SSL_SECOP_CIPHER_SHARED:
1090 case SSL_SECOP_CIPHER_CHECK:
1092 const SSL_CIPHER *c = other;
1093 /* No ciphers below security level */
1096 /* No unauthenticated ciphersuites */
1097 if (c->algorithm_auth & SSL_aNULL)
1099 /* No MD5 mac ciphersuites */
1100 if (c->algorithm_mac & SSL_MD5)
1102 /* SHA1 HMAC is 160 bits of security */
1103 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1105 /* Level 2: no RC4 */
1106 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1108 /* Level 3: forward secure ciphersuites only */
1109 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1113 case SSL_SECOP_VERSION:
1114 if (!SSL_IS_DTLS(s)) {
1115 /* SSLv3 not allowed at level 2 */
1116 if (nid <= SSL3_VERSION && level >= 2)
1118 /* TLS v1.1 and above only for level 3 */
1119 if (nid <= TLS1_VERSION && level >= 3)
1121 /* TLS v1.2 only for level 4 and above */
1122 if (nid <= TLS1_1_VERSION && level >= 4)
1125 /* DTLS v1.2 only for level 4 and above */
1126 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
1131 case SSL_SECOP_COMPRESSION:
1135 case SSL_SECOP_TICKET:
1146 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1148 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1151 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1153 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,