2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* ====================================================================
11 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
12 * ECC cipher suite support in OpenSSL originally developed by
13 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
19 #ifndef NO_SYS_TYPES_H
20 # include <sys/types.h>
23 #include "internal/o_dir.h"
24 #include <openssl/lhash.h>
25 #include <openssl/bio.h>
26 #include <openssl/pem.h>
27 #include <openssl/x509v3.h>
28 #include <openssl/dh.h>
29 #include <openssl/bn.h>
30 #include <openssl/crypto.h>
33 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, int op,
34 int bits, int nid, void *other,
37 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
38 static volatile int ssl_x509_store_ctx_idx = -1;
40 static void ssl_x509_store_ctx_init(void)
42 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0,
43 "SSL for verify callback",
47 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
50 CRYPTO_THREAD_run_once(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init);
51 return ssl_x509_store_ctx_idx;
54 CERT *ssl_cert_new(void)
56 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
59 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
63 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
65 ret->sec_cb = ssl_security_default_callback;
66 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
68 ret->lock = CRYPTO_THREAD_lock_new();
69 if (ret->lock == NULL) {
70 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
78 CERT *ssl_cert_dup(CERT *cert)
80 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
84 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
89 ret->key = &ret->pkeys[cert->key - cert->pkeys];
90 ret->lock = CRYPTO_THREAD_lock_new();
91 if (ret->lock == NULL) {
92 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
98 if (cert->dh_tmp != NULL) {
99 ret->dh_tmp = cert->dh_tmp;
100 EVP_PKEY_up_ref(ret->dh_tmp);
102 ret->dh_tmp_cb = cert->dh_tmp_cb;
103 ret->dh_tmp_auto = cert->dh_tmp_auto;
106 for (i = 0; i < SSL_PKEY_NUM; i++) {
107 CERT_PKEY *cpk = cert->pkeys + i;
108 CERT_PKEY *rpk = ret->pkeys + i;
109 if (cpk->x509 != NULL) {
110 rpk->x509 = cpk->x509;
111 X509_up_ref(rpk->x509);
114 if (cpk->privatekey != NULL) {
115 rpk->privatekey = cpk->privatekey;
116 EVP_PKEY_up_ref(cpk->privatekey);
120 rpk->chain = X509_chain_up_ref(cpk->chain);
122 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
126 if (cert->pkeys[i].serverinfo != NULL) {
127 /* Just copy everything. */
128 ret->pkeys[i].serverinfo =
129 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
130 if (ret->pkeys[i].serverinfo == NULL) {
131 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
134 ret->pkeys[i].serverinfo_length =
135 cert->pkeys[i].serverinfo_length;
136 memcpy(ret->pkeys[i].serverinfo,
137 cert->pkeys[i].serverinfo,
138 cert->pkeys[i].serverinfo_length);
142 /* Configured sigalgs copied across */
143 if (cert->conf_sigalgs) {
144 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
145 if (ret->conf_sigalgs == NULL)
147 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
148 ret->conf_sigalgslen = cert->conf_sigalgslen;
150 ret->conf_sigalgs = NULL;
152 if (cert->client_sigalgs) {
153 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
154 if (ret->client_sigalgs == NULL)
156 memcpy(ret->client_sigalgs, cert->client_sigalgs,
157 cert->client_sigalgslen);
158 ret->client_sigalgslen = cert->client_sigalgslen;
160 ret->client_sigalgs = NULL;
161 /* Shared sigalgs also NULL */
162 ret->shared_sigalgs = NULL;
163 /* Copy any custom client certificate types */
165 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
166 if (ret->ctypes == NULL)
168 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
169 ret->ctype_num = cert->ctype_num;
172 ret->cert_flags = cert->cert_flags;
174 ret->cert_cb = cert->cert_cb;
175 ret->cert_cb_arg = cert->cert_cb_arg;
177 if (cert->verify_store) {
178 X509_STORE_up_ref(cert->verify_store);
179 ret->verify_store = cert->verify_store;
182 if (cert->chain_store) {
183 X509_STORE_up_ref(cert->chain_store);
184 ret->chain_store = cert->chain_store;
187 ret->sec_cb = cert->sec_cb;
188 ret->sec_level = cert->sec_level;
189 ret->sec_ex = cert->sec_ex;
191 if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
193 if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
195 #ifndef OPENSSL_NO_PSK
196 if (cert->psk_identity_hint) {
197 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint);
198 if (ret->psk_identity_hint == NULL)
210 /* Free up and clear all certificates and chains */
212 void ssl_cert_clear_certs(CERT *c)
217 for (i = 0; i < SSL_PKEY_NUM; i++) {
218 CERT_PKEY *cpk = c->pkeys + i;
219 X509_free(cpk->x509);
221 EVP_PKEY_free(cpk->privatekey);
222 cpk->privatekey = NULL;
223 sk_X509_pop_free(cpk->chain, X509_free);
225 OPENSSL_free(cpk->serverinfo);
226 cpk->serverinfo = NULL;
227 cpk->serverinfo_length = 0;
231 void ssl_cert_free(CERT *c)
238 CRYPTO_atomic_add(&c->references, -1, &i, c->lock);
239 REF_PRINT_COUNT("CERT", c);
242 REF_ASSERT_ISNT(i < 0);
244 #ifndef OPENSSL_NO_DH
245 EVP_PKEY_free(c->dh_tmp);
248 ssl_cert_clear_certs(c);
249 OPENSSL_free(c->conf_sigalgs);
250 OPENSSL_free(c->client_sigalgs);
251 OPENSSL_free(c->shared_sigalgs);
252 OPENSSL_free(c->ctypes);
253 X509_STORE_free(c->verify_store);
254 X509_STORE_free(c->chain_store);
255 custom_exts_free(&c->cli_ext);
256 custom_exts_free(&c->srv_ext);
257 #ifndef OPENSSL_NO_PSK
258 OPENSSL_free(c->psk_identity_hint);
260 CRYPTO_THREAD_lock_free(c->lock);
264 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
267 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
270 for (i = 0; i < sk_X509_num(chain); i++) {
271 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
273 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
277 sk_X509_pop_free(cpk->chain, X509_free);
282 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
284 STACK_OF(X509) *dchain;
286 return ssl_cert_set0_chain(s, ctx, NULL);
287 dchain = X509_chain_up_ref(chain);
290 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
291 sk_X509_pop_free(dchain, X509_free);
297 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
300 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
303 r = ssl_security_cert(s, ctx, x, 0, 0);
305 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
309 cpk->chain = sk_X509_new_null();
310 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
315 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
317 if (!ssl_cert_add0_chain_cert(s, ctx, x))
323 int ssl_cert_select_current(CERT *c, X509 *x)
328 for (i = 0; i < SSL_PKEY_NUM; i++) {
329 CERT_PKEY *cpk = c->pkeys + i;
330 if (cpk->x509 == x && cpk->privatekey) {
336 for (i = 0; i < SSL_PKEY_NUM; i++) {
337 CERT_PKEY *cpk = c->pkeys + i;
338 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
346 int ssl_cert_set_current(CERT *c, long op)
351 if (op == SSL_CERT_SET_FIRST)
353 else if (op == SSL_CERT_SET_NEXT) {
354 idx = (int)(c->key - c->pkeys + 1);
355 if (idx >= SSL_PKEY_NUM)
359 for (i = idx; i < SSL_PKEY_NUM; i++) {
360 CERT_PKEY *cpk = c->pkeys + i;
361 if (cpk->x509 && cpk->privatekey) {
369 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
372 c->cert_cb_arg = arg;
375 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
379 X509_STORE *verify_store;
380 X509_STORE_CTX *ctx = NULL;
381 X509_VERIFY_PARAM *param;
383 if ((sk == NULL) || (sk_X509_num(sk) == 0))
386 if (s->cert->verify_store)
387 verify_store = s->cert->verify_store;
389 verify_store = s->ctx->cert_store;
391 ctx = X509_STORE_CTX_new();
393 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
397 x = sk_X509_value(sk, 0);
398 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
399 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
402 param = X509_STORE_CTX_get0_param(ctx);
404 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
405 * point, for now a single @SECLEVEL sets the same policy for TLS crypto
406 * and PKI authentication.
408 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s));
410 /* Set suite B flags if needed */
411 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
412 if (!X509_STORE_CTX_set_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
416 /* Verify via DANE if enabled */
417 if (DANETLS_ENABLED(&s->dane))
418 X509_STORE_CTX_set0_dane(ctx, &s->dane);
421 * We need to inherit the verify parameters. These can be determined by
422 * the context: if its a server it will verify SSL client certificates or
426 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
428 * Anything non-default in "s->param" should overwrite anything in the ctx.
430 X509_VERIFY_PARAM_set1(param, s->param);
432 if (s->verify_callback)
433 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
435 if (s->ctx->app_verify_callback != NULL)
436 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
438 i = X509_verify_cert(ctx);
440 s->verify_result = X509_STORE_CTX_get_error(ctx);
441 sk_X509_pop_free(s->verified_chain, X509_free);
442 s->verified_chain = NULL;
443 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
444 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
445 if (s->verified_chain == NULL) {
446 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
451 /* Move peername from the store context params to the SSL handle's */
452 X509_VERIFY_PARAM_move_peername(s->param, param);
455 X509_STORE_CTX_free(ctx);
459 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
460 STACK_OF(X509_NAME) *name_list)
462 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
463 *ca_list = name_list;
466 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
469 STACK_OF(X509_NAME) *ret;
472 ret = sk_X509_NAME_new_null();
474 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
477 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
478 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
479 if (name == NULL || !sk_X509_NAME_push(ret, name)) {
480 sk_X509_NAME_pop_free(ret, X509_NAME_free);
481 X509_NAME_free(name);
488 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
490 set_client_CA_list(&(s->client_CA), name_list);
493 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
495 set_client_CA_list(&(ctx->client_CA), name_list);
498 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
500 return (ctx->client_CA);
503 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
505 if (!s->server) { /* we are in the client */
506 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
507 return (s->s3->tmp.ca_names);
511 if (s->client_CA != NULL)
512 return (s->client_CA);
514 return (s->ctx->client_CA);
518 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
524 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
527 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
530 if (!sk_X509_NAME_push(*sk, name)) {
531 X509_NAME_free(name);
537 int SSL_add_client_CA(SSL *ssl, X509 *x)
539 return (add_client_CA(&(ssl->client_CA), x));
542 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
544 return (add_client_CA(&(ctx->client_CA), x));
547 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
549 return (X509_NAME_cmp(*a, *b));
552 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
554 return X509_NAME_cmp(a, b);
557 static unsigned long xname_hash(const X509_NAME *a)
559 return X509_NAME_hash((X509_NAME *)a);
563 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
564 * it doesn't really have anything to do with clients (except that a common use
565 * for a stack of CAs is to send it to the client). Actually, it doesn't have
566 * much to do with CAs, either, since it will load any old cert.
567 * \param file the file containing one or more certs.
568 * \return a ::STACK containing the certs.
570 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
572 BIO *in = BIO_new(BIO_s_file());
574 X509_NAME *xn = NULL;
575 STACK_OF(X509_NAME) *ret = NULL;
576 LHASH_OF(X509_NAME) *name_hash =
577 lh_X509_NAME_new(xname_hash, xname_cmp);
579 if ((name_hash == NULL) || (in == NULL)) {
580 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
584 if (!BIO_read_filename(in, file))
588 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
591 ret = sk_X509_NAME_new_null();
593 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
597 if ((xn = X509_get_subject_name(x)) == NULL)
599 /* check for duplicates */
600 xn = X509_NAME_dup(xn);
603 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
608 if (!lh_X509_NAME_insert(name_hash, xn))
610 if (!sk_X509_NAME_push(ret, xn))
618 sk_X509_NAME_pop_free(ret, X509_NAME_free);
623 lh_X509_NAME_free(name_hash);
630 * Add a file of certs to a stack.
631 * \param stack the stack to add to.
632 * \param file the file to add from. All certs in this file that are not
633 * already in the stack will be added.
634 * \return 1 for success, 0 for failure. Note that in the case of failure some
635 * certs may have been added to \c stack.
638 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
643 X509_NAME *xn = NULL;
645 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
647 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
649 in = BIO_new(BIO_s_file());
652 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
653 ERR_R_MALLOC_FAILURE);
657 if (!BIO_read_filename(in, file))
661 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
663 if ((xn = X509_get_subject_name(x)) == NULL)
665 xn = X509_NAME_dup(xn);
668 if (sk_X509_NAME_find(stack, xn) >= 0) {
671 } else if (!sk_X509_NAME_push(stack, xn)) {
685 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
690 * Add a directory of certs to a stack.
691 * \param stack the stack to append to.
692 * \param dir the directory to append from. All files in this directory will be
693 * examined as potential certs. Any that are acceptable to
694 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
696 * \return 1 for success, 0 for failure. Note that in the case of failure some
697 * certs may have been added to \c stack.
700 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
703 OPENSSL_DIR_CTX *d = NULL;
704 const char *filename;
707 /* Note that a side effect is that the CAs will be sorted by name */
709 while ((filename = OPENSSL_DIR_read(&d, dir))) {
713 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
714 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
715 SSL_R_PATH_TOO_LONG);
718 #ifdef OPENSSL_SYS_VMS
719 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
721 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
723 if (r <= 0 || r >= (int)sizeof(buf))
725 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
730 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
731 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
732 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
745 /* Add a certificate to a BUF_MEM structure */
747 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
752 n = i2d_X509(x, NULL);
753 if (n < 0 || !BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
754 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
757 p = (unsigned char *)&(buf->data[*l]);
761 /* Shouldn't happen */
762 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
770 /* Add certificate chain to internal SSL BUF_MEM structure */
771 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
773 BUF_MEM *buf = s->init_buf;
776 STACK_OF(X509) *extra_certs;
777 STACK_OF(X509) *chain = NULL;
778 X509_STORE *chain_store;
780 /* TLSv1 sends a chain with nothing in it, instead of an alert */
781 if (!BUF_MEM_grow_clean(buf, 10)) {
782 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
786 if (!cpk || !cpk->x509)
792 * If we have a certificate specific chain use it, else use parent ctx.
795 extra_certs = cpk->chain;
797 extra_certs = s->ctx->extra_certs;
799 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
801 else if (s->cert->chain_store)
802 chain_store = s->cert->chain_store;
804 chain_store = s->ctx->cert_store;
807 X509_STORE_CTX* xs_ctx = X509_STORE_CTX_new();
809 if (xs_ctx == NULL) {
810 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
813 if (!X509_STORE_CTX_init(xs_ctx, chain_store, x, NULL)) {
814 X509_STORE_CTX_free(xs_ctx);
815 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
819 * It is valid for the chain not to be complete (because normally we
820 * don't include the root cert in the chain). Therefore we deliberately
821 * ignore the error return from this call. We're not actually verifying
822 * the cert - we're just building as much of the chain as we can
824 (void) X509_verify_cert(xs_ctx);
825 /* Don't leave errors in the queue */
827 chain = X509_STORE_CTX_get0_chain(xs_ctx);
828 i = ssl_security_cert_chain(s, chain, NULL, 0);
831 /* Dummy error calls so mkerr generates them */
832 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
833 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
834 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
836 X509_STORE_CTX_free(xs_ctx);
837 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
840 chain_count = sk_X509_num(chain);
841 for (i = 0; i < chain_count; i++) {
842 x = sk_X509_value(chain, i);
844 if (!ssl_add_cert_to_buf(buf, l, x)) {
845 X509_STORE_CTX_free(xs_ctx);
849 X509_STORE_CTX_free(xs_ctx);
851 i = ssl_security_cert_chain(s, extra_certs, x, 0);
853 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
856 if (!ssl_add_cert_to_buf(buf, l, x))
858 for (i = 0; i < sk_X509_num(extra_certs); i++) {
859 x = sk_X509_value(extra_certs, i);
860 if (!ssl_add_cert_to_buf(buf, l, x))
867 /* Build a certificate chain for current certificate */
868 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
870 CERT *c = s ? s->cert : ctx->cert;
871 CERT_PKEY *cpk = c->key;
872 X509_STORE *chain_store = NULL;
873 X509_STORE_CTX *xs_ctx = NULL;
874 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
880 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
883 /* Rearranging and check the chain: add everything to a store */
884 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
885 chain_store = X509_STORE_new();
886 if (chain_store == NULL)
888 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
889 x = sk_X509_value(cpk->chain, i);
890 if (!X509_STORE_add_cert(chain_store, x)) {
891 error = ERR_peek_last_error();
892 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
893 ERR_GET_REASON(error) !=
894 X509_R_CERT_ALREADY_IN_HASH_TABLE)
899 /* Add EE cert too: it might be self signed */
900 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
901 error = ERR_peek_last_error();
902 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
903 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
909 chain_store = c->chain_store;
911 chain_store = s->ctx->cert_store;
913 chain_store = ctx->cert_store;
915 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
916 untrusted = cpk->chain;
919 xs_ctx = X509_STORE_CTX_new();
920 if (xs_ctx == NULL) {
921 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
924 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
925 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
928 /* Set suite B flags if needed */
929 X509_STORE_CTX_set_flags(xs_ctx,
930 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
932 i = X509_verify_cert(xs_ctx);
933 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
934 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
940 chain = X509_STORE_CTX_get1_chain(xs_ctx);
942 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
943 i = X509_STORE_CTX_get_error(xs_ctx);
944 ERR_add_error_data(2, "Verify error:",
945 X509_verify_cert_error_string(i));
949 /* Remove EE certificate from chain */
950 x = sk_X509_shift(chain);
952 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
953 if (sk_X509_num(chain) > 0) {
954 /* See if last cert is self signed */
955 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
956 if (X509_get_extension_flags(x) & EXFLAG_SS) {
957 x = sk_X509_pop(chain);
963 * Check security level of all CA certificates: EE will have been checked
966 for (i = 0; i < sk_X509_num(chain); i++) {
967 x = sk_X509_value(chain, i);
968 rv = ssl_security_cert(s, ctx, x, 0, 0);
970 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
971 sk_X509_pop_free(chain, X509_free);
976 sk_X509_pop_free(cpk->chain, X509_free);
981 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
982 X509_STORE_free(chain_store);
983 X509_STORE_CTX_free(xs_ctx);
988 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
992 pstore = &c->chain_store;
994 pstore = &c->verify_store;
995 X509_STORE_free(*pstore);
998 X509_STORE_up_ref(store);
1002 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, int op,
1003 int bits, int nid, void *other,
1007 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1009 level = SSL_CTX_get_security_level(ctx);
1011 level = SSL_get_security_level(s);
1015 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1018 if (op == SSL_SECOP_TMP_DH && bits < 80)
1024 minbits = minbits_table[level - 1];
1026 case SSL_SECOP_CIPHER_SUPPORTED:
1027 case SSL_SECOP_CIPHER_SHARED:
1028 case SSL_SECOP_CIPHER_CHECK:
1030 const SSL_CIPHER *c = other;
1031 /* No ciphers below security level */
1034 /* No unauthenticated ciphersuites */
1035 if (c->algorithm_auth & SSL_aNULL)
1037 /* No MD5 mac ciphersuites */
1038 if (c->algorithm_mac & SSL_MD5)
1040 /* SHA1 HMAC is 160 bits of security */
1041 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1043 /* Level 2: no RC4 */
1044 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1046 /* Level 3: forward secure ciphersuites only */
1047 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1051 case SSL_SECOP_VERSION:
1052 if (!SSL_IS_DTLS(s)) {
1053 /* SSLv3 not allowed at level 2 */
1054 if (nid <= SSL3_VERSION && level >= 2)
1056 /* TLS v1.1 and above only for level 3 */
1057 if (nid <= TLS1_VERSION && level >= 3)
1059 /* TLS v1.2 only for level 4 and above */
1060 if (nid <= TLS1_1_VERSION && level >= 4)
1063 /* DTLS v1.2 only for level 4 and above */
1064 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
1069 case SSL_SECOP_COMPRESSION:
1073 case SSL_SECOP_TICKET:
1084 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
1086 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1089 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1091 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,