1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
57 /* ====================================================================
58 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
64 * 1. Redistributions of source code must retain the above copyright
65 * notice, this list of conditions and the following disclaimer.
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
86 * 6. Redistributions of any form whatsoever must retain the following
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com).
110 /* ====================================================================
111 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
112 * ECC cipher suite support in OpenSSL originally developed by
113 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
119 #ifndef NO_SYS_TYPES_H
120 # include <sys/types.h>
123 #include "internal/o_dir.h"
124 #include <openssl/lhash.h>
125 #include <openssl/bio.h>
126 #include <openssl/pem.h>
127 #include <openssl/x509v3.h>
128 #ifndef OPENSSL_NO_DH
129 # include <openssl/dh.h>
131 #include <openssl/bn.h>
132 #include "internal/threads.h"
133 #include "ssl_locl.h"
135 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, int op,
136 int bits, int nid, void *other,
139 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
140 static volatile int ssl_x509_store_ctx_idx = -1;
142 static void ssl_x509_store_ctx_init(void)
144 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0,
145 "SSL for verify callback",
149 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
152 CRYPTO_THREAD_run_once(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init);
153 return ssl_x509_store_ctx_idx;
156 CERT *ssl_cert_new(void)
158 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
161 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
165 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
167 ret->sec_cb = ssl_security_default_callback;
168 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
170 ret->lock = CRYPTO_THREAD_lock_new();
171 if (ret->lock == NULL) {
172 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
180 CERT *ssl_cert_dup(CERT *cert)
182 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
186 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
191 ret->key = &ret->pkeys[cert->key - cert->pkeys];
192 ret->lock = CRYPTO_THREAD_lock_new();
193 if (ret->lock == NULL) {
194 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
199 #ifndef OPENSSL_NO_DH
200 if (cert->dh_tmp != NULL) {
201 ret->dh_tmp = cert->dh_tmp;
202 EVP_PKEY_up_ref(ret->dh_tmp);
204 ret->dh_tmp_cb = cert->dh_tmp_cb;
205 ret->dh_tmp_auto = cert->dh_tmp_auto;
208 for (i = 0; i < SSL_PKEY_NUM; i++) {
209 CERT_PKEY *cpk = cert->pkeys + i;
210 CERT_PKEY *rpk = ret->pkeys + i;
211 if (cpk->x509 != NULL) {
212 rpk->x509 = cpk->x509;
213 X509_up_ref(rpk->x509);
216 if (cpk->privatekey != NULL) {
217 rpk->privatekey = cpk->privatekey;
218 EVP_PKEY_up_ref(cpk->privatekey);
222 rpk->chain = X509_chain_up_ref(cpk->chain);
224 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
228 if (cert->pkeys[i].serverinfo != NULL) {
229 /* Just copy everything. */
230 ret->pkeys[i].serverinfo =
231 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
232 if (ret->pkeys[i].serverinfo == NULL) {
233 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
236 ret->pkeys[i].serverinfo_length =
237 cert->pkeys[i].serverinfo_length;
238 memcpy(ret->pkeys[i].serverinfo,
239 cert->pkeys[i].serverinfo,
240 cert->pkeys[i].serverinfo_length);
244 /* Configured sigalgs copied across */
245 if (cert->conf_sigalgs) {
246 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
247 if (ret->conf_sigalgs == NULL)
249 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
250 ret->conf_sigalgslen = cert->conf_sigalgslen;
252 ret->conf_sigalgs = NULL;
254 if (cert->client_sigalgs) {
255 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
256 if (ret->client_sigalgs == NULL)
258 memcpy(ret->client_sigalgs, cert->client_sigalgs,
259 cert->client_sigalgslen);
260 ret->client_sigalgslen = cert->client_sigalgslen;
262 ret->client_sigalgs = NULL;
263 /* Shared sigalgs also NULL */
264 ret->shared_sigalgs = NULL;
265 /* Copy any custom client certificate types */
267 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
268 if (ret->ctypes == NULL)
270 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
271 ret->ctype_num = cert->ctype_num;
274 ret->cert_flags = cert->cert_flags;
276 ret->cert_cb = cert->cert_cb;
277 ret->cert_cb_arg = cert->cert_cb_arg;
279 if (cert->verify_store) {
280 X509_STORE_up_ref(cert->verify_store);
281 ret->verify_store = cert->verify_store;
284 if (cert->chain_store) {
285 X509_STORE_up_ref(cert->chain_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 CRYPTO_atomic_add(&c->references, -1, &i, c->lock);
341 REF_PRINT_COUNT("CERT", c);
344 REF_ASSERT_ISNT(i < 0);
346 #ifndef OPENSSL_NO_DH
347 EVP_PKEY_free(c->dh_tmp);
350 ssl_cert_clear_certs(c);
351 OPENSSL_free(c->conf_sigalgs);
352 OPENSSL_free(c->client_sigalgs);
353 OPENSSL_free(c->shared_sigalgs);
354 OPENSSL_free(c->ctypes);
355 X509_STORE_free(c->verify_store);
356 X509_STORE_free(c->chain_store);
357 custom_exts_free(&c->cli_ext);
358 custom_exts_free(&c->srv_ext);
359 #ifndef OPENSSL_NO_PSK
360 OPENSSL_free(c->psk_identity_hint);
362 CRYPTO_THREAD_lock_free(c->lock);
366 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
369 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
372 sk_X509_pop_free(cpk->chain, X509_free);
373 for (i = 0; i < sk_X509_num(chain); i++) {
374 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
376 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
384 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
386 STACK_OF(X509) *dchain;
388 return ssl_cert_set0_chain(s, ctx, NULL);
389 dchain = X509_chain_up_ref(chain);
392 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
393 sk_X509_pop_free(dchain, X509_free);
399 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
402 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
405 r = ssl_security_cert(s, ctx, x, 0, 0);
407 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
411 cpk->chain = sk_X509_new_null();
412 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
417 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
419 if (!ssl_cert_add0_chain_cert(s, ctx, x))
425 int ssl_cert_select_current(CERT *c, X509 *x)
430 for (i = 0; i < SSL_PKEY_NUM; i++) {
431 CERT_PKEY *cpk = c->pkeys + i;
432 if (cpk->x509 == x && cpk->privatekey) {
438 for (i = 0; i < SSL_PKEY_NUM; i++) {
439 CERT_PKEY *cpk = c->pkeys + i;
440 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
448 int ssl_cert_set_current(CERT *c, long op)
453 if (op == SSL_CERT_SET_FIRST)
455 else if (op == SSL_CERT_SET_NEXT) {
456 idx = (int)(c->key - c->pkeys + 1);
457 if (idx >= SSL_PKEY_NUM)
461 for (i = idx; i < SSL_PKEY_NUM; i++) {
462 CERT_PKEY *cpk = c->pkeys + i;
463 if (cpk->x509 && cpk->privatekey) {
471 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
474 c->cert_cb_arg = arg;
477 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
481 X509_STORE *verify_store;
483 X509_VERIFY_PARAM *param;
485 if (s->cert->verify_store)
486 verify_store = s->cert->verify_store;
488 verify_store = s->ctx->cert_store;
490 if ((sk == NULL) || (sk_X509_num(sk) == 0))
493 x = sk_X509_value(sk, 0);
494 if (!X509_STORE_CTX_init(&ctx, verify_store, x, sk)) {
495 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
498 param = X509_STORE_CTX_get0_param(&ctx);
500 /* Set suite B flags if needed */
501 X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
502 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);
504 /* Verify via DANE if enabled */
505 if (DANETLS_ENABLED(&s->dane))
506 X509_STORE_CTX_set0_dane(&ctx, &s->dane);
509 * We need to inherit the verify parameters. These can be determined by
510 * the context: if its a server it will verify SSL client certificates or
514 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server");
516 * Anything non-default in "s->param" should overwrite anything in the ctx.
518 X509_VERIFY_PARAM_set1(param, s->param);
520 if (s->verify_callback)
521 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
523 if (s->ctx->app_verify_callback != NULL)
524 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
526 i = X509_verify_cert(&ctx);
528 /* Dummy error calls so mkerr generates them */
529 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
530 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
531 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
534 i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
537 s->verify_result = ctx.error;
538 sk_X509_pop_free(s->verified_chain, X509_free);
539 s->verified_chain = NULL;
540 if (X509_STORE_CTX_get_chain(&ctx) != NULL) {
541 s->verified_chain = X509_STORE_CTX_get1_chain(&ctx);
542 if (s->verified_chain == NULL) {
543 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
548 /* Move peername from the store context params to the SSL handle's */
549 X509_VERIFY_PARAM_move_peername(s->param, param);
551 X509_STORE_CTX_cleanup(&ctx);
556 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
557 STACK_OF(X509_NAME) *name_list)
559 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
560 *ca_list = name_list;
563 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
566 STACK_OF(X509_NAME) *ret;
569 ret = sk_X509_NAME_new_null();
570 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
571 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
572 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) {
573 sk_X509_NAME_pop_free(ret, X509_NAME_free);
580 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
582 set_client_CA_list(&(s->client_CA), name_list);
585 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
587 set_client_CA_list(&(ctx->client_CA), name_list);
590 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
592 return (ctx->client_CA);
595 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
597 if (!s->server) { /* we are in the client */
598 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
599 return (s->s3->tmp.ca_names);
603 if (s->client_CA != NULL)
604 return (s->client_CA);
606 return (s->ctx->client_CA);
610 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
616 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
619 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
622 if (!sk_X509_NAME_push(*sk, name)) {
623 X509_NAME_free(name);
629 int SSL_add_client_CA(SSL *ssl, X509 *x)
631 return (add_client_CA(&(ssl->client_CA), x));
634 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
636 return (add_client_CA(&(ctx->client_CA), x));
639 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
641 return (X509_NAME_cmp(*a, *b));
644 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
646 return X509_NAME_cmp(a, b);
649 static unsigned long xname_hash(const X509_NAME *a)
651 return X509_NAME_hash((X509_NAME *)a);
655 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
656 * it doesn't really have anything to do with clients (except that a common use
657 * for a stack of CAs is to send it to the client). Actually, it doesn't have
658 * much to do with CAs, either, since it will load any old cert.
659 * \param file the file containing one or more certs.
660 * \return a ::STACK containing the certs.
662 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
664 BIO *in = BIO_new(BIO_s_file());
666 X509_NAME *xn = NULL;
667 STACK_OF(X509_NAME) *ret = NULL;
668 LHASH_OF(X509_NAME) *name_hash =
669 lh_X509_NAME_new(xname_hash, xname_cmp);
671 if ((name_hash == NULL) || (in == NULL)) {
672 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
676 if (!BIO_read_filename(in, file))
680 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
683 ret = sk_X509_NAME_new_null();
685 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
689 if ((xn = X509_get_subject_name(x)) == NULL)
691 /* check for duplicates */
692 xn = X509_NAME_dup(xn);
695 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
699 lh_X509_NAME_insert(name_hash, xn);
700 sk_X509_NAME_push(ret, xn);
706 sk_X509_NAME_pop_free(ret, X509_NAME_free);
711 lh_X509_NAME_free(name_hash);
718 * Add a file of certs to a stack.
719 * \param stack the stack to add to.
720 * \param file the file to add from. All certs in this file that are not
721 * already in the stack will be added.
722 * \return 1 for success, 0 for failure. Note that in the case of failure some
723 * certs may have been added to \c stack.
726 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
731 X509_NAME *xn = NULL;
733 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
735 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
737 in = BIO_new(BIO_s_file());
740 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
741 ERR_R_MALLOC_FAILURE);
745 if (!BIO_read_filename(in, file))
749 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
751 if ((xn = X509_get_subject_name(x)) == NULL)
753 xn = X509_NAME_dup(xn);
756 if (sk_X509_NAME_find(stack, xn) >= 0)
759 sk_X509_NAME_push(stack, xn);
770 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
775 * Add a directory of certs to a stack.
776 * \param stack the stack to append to.
777 * \param dir the directory to append from. All files in this directory will be
778 * examined as potential certs. Any that are acceptable to
779 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
781 * \return 1 for success, 0 for failure. Note that in the case of failure some
782 * certs may have been added to \c stack.
785 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
788 OPENSSL_DIR_CTX *d = NULL;
789 const char *filename;
792 /* Note that a side effect is that the CAs will be sorted by name */
794 while ((filename = OPENSSL_DIR_read(&d, dir))) {
798 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
799 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
800 SSL_R_PATH_TOO_LONG);
803 #ifdef OPENSSL_SYS_VMS
804 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
806 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
808 if (r <= 0 || r >= (int)sizeof(buf))
810 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
815 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
816 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
817 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
830 /* Add a certificate to a BUF_MEM structure */
832 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
837 n = i2d_X509(x, NULL);
838 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
839 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
842 p = (unsigned char *)&(buf->data[*l]);
850 /* Add certificate chain to internal SSL BUF_MEM strcuture */
851 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
853 BUF_MEM *buf = s->init_buf;
857 STACK_OF(X509) *extra_certs;
858 X509_STORE *chain_store;
860 /* TLSv1 sends a chain with nothing in it, instead of an alert */
861 if (!BUF_MEM_grow_clean(buf, 10)) {
862 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
866 if (!cpk || !cpk->x509)
872 * If we have a certificate specific chain use it, else use parent ctx.
875 extra_certs = cpk->chain;
877 extra_certs = s->ctx->extra_certs;
879 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
881 else if (s->cert->chain_store)
882 chain_store = s->cert->chain_store;
884 chain_store = s->ctx->cert_store;
887 X509_STORE_CTX xs_ctx;
889 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, x, NULL)) {
890 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
894 * It is valid for the chain not to be complete (because normally we
895 * don't include the root cert in the chain). Therefore we deliberately
896 * ignore the error return from this call. We're not actually verifying
897 * the cert - we're just building as much of the chain as we can
899 X509_verify_cert(&xs_ctx);
900 /* Don't leave errors in the queue */
902 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
904 X509_STORE_CTX_cleanup(&xs_ctx);
905 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
908 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
909 x = sk_X509_value(xs_ctx.chain, i);
911 if (!ssl_add_cert_to_buf(buf, l, x)) {
912 X509_STORE_CTX_cleanup(&xs_ctx);
916 X509_STORE_CTX_cleanup(&xs_ctx);
918 i = ssl_security_cert_chain(s, extra_certs, x, 0);
920 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
923 if (!ssl_add_cert_to_buf(buf, l, x))
925 for (i = 0; i < sk_X509_num(extra_certs); i++) {
926 x = sk_X509_value(extra_certs, i);
927 if (!ssl_add_cert_to_buf(buf, l, x))
934 /* Build a certificate chain for current certificate */
935 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
937 CERT *c = s ? s->cert : ctx->cert;
938 CERT_PKEY *cpk = c->key;
939 X509_STORE *chain_store = NULL;
940 X509_STORE_CTX xs_ctx;
941 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
947 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
950 /* Rearranging and check the chain: add everything to a store */
951 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
952 chain_store = X509_STORE_new();
953 if (chain_store == NULL)
955 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
956 x = sk_X509_value(cpk->chain, i);
957 if (!X509_STORE_add_cert(chain_store, x)) {
958 error = ERR_peek_last_error();
959 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
960 ERR_GET_REASON(error) !=
961 X509_R_CERT_ALREADY_IN_HASH_TABLE)
966 /* Add EE cert too: it might be self signed */
967 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
968 error = ERR_peek_last_error();
969 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
970 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
976 chain_store = c->chain_store;
978 chain_store = s->ctx->cert_store;
980 chain_store = ctx->cert_store;
982 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
983 untrusted = cpk->chain;
986 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted)) {
987 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
990 /* Set suite B flags if needed */
991 X509_STORE_CTX_set_flags(&xs_ctx,
992 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
994 i = X509_verify_cert(&xs_ctx);
995 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
996 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1002 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1004 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1005 i = X509_STORE_CTX_get_error(&xs_ctx);
1006 ERR_add_error_data(2, "Verify error:",
1007 X509_verify_cert_error_string(i));
1009 X509_STORE_CTX_cleanup(&xs_ctx);
1012 X509_STORE_CTX_cleanup(&xs_ctx);
1013 /* Remove EE certificate from chain */
1014 x = sk_X509_shift(chain);
1016 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
1017 if (sk_X509_num(chain) > 0) {
1018 /* See if last cert is self signed */
1019 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1020 if (X509_get_extension_flags(x) & EXFLAG_SS) {
1021 x = sk_X509_pop(chain);
1027 * Check security level of all CA certificates: EE will have been checked
1030 for (i = 0; i < sk_X509_num(chain); i++) {
1031 x = sk_X509_value(chain, i);
1032 rv = ssl_security_cert(s, ctx, x, 0, 0);
1034 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1035 sk_X509_pop_free(chain, X509_free);
1040 sk_X509_pop_free(cpk->chain, X509_free);
1045 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1046 X509_STORE_free(chain_store);
1051 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1053 X509_STORE **pstore;
1055 pstore = &c->chain_store;
1057 pstore = &c->verify_store;
1058 X509_STORE_free(*pstore);
1061 X509_STORE_up_ref(store);
1065 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, int op,
1066 int bits, int nid, void *other,
1070 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1072 level = SSL_CTX_get_security_level(ctx);
1074 level = SSL_get_security_level(s);
1078 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1081 if (op == SSL_SECOP_TMP_DH && bits < 80)
1087 minbits = minbits_table[level - 1];
1089 case SSL_SECOP_CIPHER_SUPPORTED:
1090 case SSL_SECOP_CIPHER_SHARED:
1091 case SSL_SECOP_CIPHER_CHECK:
1093 const SSL_CIPHER *c = other;
1094 /* No ciphers below security level */
1097 /* No unauthenticated ciphersuites */
1098 if (c->algorithm_auth & SSL_aNULL)
1100 /* No MD5 mac ciphersuites */
1101 if (c->algorithm_mac & SSL_MD5)
1103 /* SHA1 HMAC is 160 bits of security */
1104 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1106 /* Level 2: no RC4 */
1107 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1109 /* Level 3: forward secure ciphersuites only */
1110 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1114 case SSL_SECOP_VERSION:
1115 if (!SSL_IS_DTLS(s)) {
1116 /* SSLv3 not allowed at level 2 */
1117 if (nid <= SSL3_VERSION && level >= 2)
1119 /* TLS v1.1 and above only for level 3 */
1120 if (nid <= TLS1_VERSION && level >= 3)
1122 /* TLS v1.2 only for level 4 and above */
1123 if (nid <= TLS1_1_VERSION && level >= 4)
1126 /* DTLS v1.2 only for level 4 and above */
1127 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
1132 case SSL_SECOP_COMPRESSION:
1136 case SSL_SECOP_TICKET:
1147 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
1149 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1152 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1154 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,