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>
32 #include "internal/thread_once.h"
34 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
35 int op, int bits, int nid, void *other,
38 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
39 static volatile int ssl_x509_store_ctx_idx = -1;
41 DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)
43 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0,
44 "SSL for verify callback",
46 return ssl_x509_store_ctx_idx >= 0;
49 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
52 if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init))
54 return ssl_x509_store_ctx_idx;
57 CERT *ssl_cert_new(void)
59 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
62 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
66 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
68 ret->sec_cb = ssl_security_default_callback;
69 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
71 ret->lock = CRYPTO_THREAD_lock_new();
72 if (ret->lock == NULL) {
73 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
81 CERT *ssl_cert_dup(CERT *cert)
83 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
87 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
92 ret->key = &ret->pkeys[cert->key - cert->pkeys];
93 ret->lock = CRYPTO_THREAD_lock_new();
94 if (ret->lock == NULL) {
95 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
100 if (cert->dh_tmp != NULL) {
101 ret->dh_tmp = cert->dh_tmp;
102 EVP_PKEY_up_ref(ret->dh_tmp);
104 ret->dh_tmp_cb = cert->dh_tmp_cb;
105 ret->dh_tmp_auto = cert->dh_tmp_auto;
108 for (i = 0; i < SSL_PKEY_NUM; i++) {
109 CERT_PKEY *cpk = cert->pkeys + i;
110 CERT_PKEY *rpk = ret->pkeys + i;
111 if (cpk->x509 != NULL) {
112 rpk->x509 = cpk->x509;
113 X509_up_ref(rpk->x509);
116 if (cpk->privatekey != NULL) {
117 rpk->privatekey = cpk->privatekey;
118 EVP_PKEY_up_ref(cpk->privatekey);
122 rpk->chain = X509_chain_up_ref(cpk->chain);
124 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
128 if (cert->pkeys[i].serverinfo != NULL) {
129 /* Just copy everything. */
130 ret->pkeys[i].serverinfo =
131 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
132 if (ret->pkeys[i].serverinfo == NULL) {
133 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
136 ret->pkeys[i].serverinfo_length = cert->pkeys[i].serverinfo_length;
137 memcpy(ret->pkeys[i].serverinfo,
138 cert->pkeys[i].serverinfo, 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
413 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
417 /* Verify via DANE if enabled */
418 if (DANETLS_ENABLED(&s->dane))
419 X509_STORE_CTX_set0_dane(ctx, &s->dane);
422 * We need to inherit the verify parameters. These can be determined by
423 * the context: if its a server it will verify SSL client certificates or
427 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
429 * Anything non-default in "s->param" should overwrite anything in the ctx.
431 X509_VERIFY_PARAM_set1(param, s->param);
433 if (s->verify_callback)
434 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
436 if (s->ctx->app_verify_callback != NULL)
437 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
439 i = X509_verify_cert(ctx);
441 s->verify_result = X509_STORE_CTX_get_error(ctx);
442 sk_X509_pop_free(s->verified_chain, X509_free);
443 s->verified_chain = NULL;
444 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
445 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
446 if (s->verified_chain == NULL) {
447 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
452 /* Move peername from the store context params to the SSL handle's */
453 X509_VERIFY_PARAM_move_peername(s->param, param);
456 X509_STORE_CTX_free(ctx);
460 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
461 STACK_OF(X509_NAME) *name_list)
463 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
464 *ca_list = name_list;
467 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
470 STACK_OF(X509_NAME) *ret;
473 ret = sk_X509_NAME_new_null();
475 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
478 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
479 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
480 if (name == NULL || !sk_X509_NAME_push(ret, name)) {
481 sk_X509_NAME_pop_free(ret, X509_NAME_free);
482 X509_NAME_free(name);
489 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
491 set_client_CA_list(&(s->client_CA), name_list);
494 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
496 set_client_CA_list(&(ctx->client_CA), name_list);
499 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
501 return (ctx->client_CA);
504 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
506 if (!s->server) { /* we are in the client */
507 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
508 return (s->s3->tmp.ca_names);
512 if (s->client_CA != NULL)
513 return (s->client_CA);
515 return (s->ctx->client_CA);
519 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
525 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
528 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
531 if (!sk_X509_NAME_push(*sk, name)) {
532 X509_NAME_free(name);
538 int SSL_add_client_CA(SSL *ssl, X509 *x)
540 return (add_client_CA(&(ssl->client_CA), x));
543 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
545 return (add_client_CA(&(ctx->client_CA), x));
548 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
550 return (X509_NAME_cmp(*a, *b));
553 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
555 return X509_NAME_cmp(a, b);
558 static unsigned long xname_hash(const X509_NAME *a)
560 return X509_NAME_hash((X509_NAME *)a);
564 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
565 * it doesn't really have anything to do with clients (except that a common use
566 * for a stack of CAs is to send it to the client). Actually, it doesn't have
567 * much to do with CAs, either, since it will load any old cert.
568 * \param file the file containing one or more certs.
569 * \return a ::STACK containing the certs.
571 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
573 BIO *in = BIO_new(BIO_s_file());
575 X509_NAME *xn = NULL;
576 STACK_OF(X509_NAME) *ret = NULL;
577 LHASH_OF(X509_NAME) *name_hash = 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 lh_X509_NAME_insert(name_hash, xn);
609 if (!sk_X509_NAME_push(ret, xn))
617 sk_X509_NAME_pop_free(ret, X509_NAME_free);
622 lh_X509_NAME_free(name_hash);
629 * Add a file of certs to a stack.
630 * \param stack the stack to add to.
631 * \param file the file to add from. All certs in this file that are not
632 * already in the stack will be added.
633 * \return 1 for success, 0 for failure. Note that in the case of failure some
634 * certs may have been added to \c stack.
637 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
642 X509_NAME *xn = NULL;
644 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
646 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
648 in = BIO_new(BIO_s_file());
651 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE);
655 if (!BIO_read_filename(in, file))
659 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
661 if ((xn = X509_get_subject_name(x)) == NULL)
663 xn = X509_NAME_dup(xn);
666 if (sk_X509_NAME_find(stack, xn) >= 0) {
669 } else if (!sk_X509_NAME_push(stack, xn)) {
683 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
688 * Add a directory of certs to a stack.
689 * \param stack the stack to append to.
690 * \param dir the directory to append from. All files in this directory will be
691 * examined as potential certs. Any that are acceptable to
692 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
694 * \return 1 for success, 0 for failure. Note that in the case of failure some
695 * certs may have been added to \c stack.
698 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
701 OPENSSL_DIR_CTX *d = NULL;
702 const char *filename;
705 /* Note that a side effect is that the CAs will be sorted by name */
707 while ((filename = OPENSSL_DIR_read(&d, dir))) {
711 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
712 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
713 SSL_R_PATH_TOO_LONG);
716 #ifdef OPENSSL_SYS_VMS
717 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
719 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
721 if (r <= 0 || r >= (int)sizeof(buf))
723 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
728 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
729 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
730 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
743 /* Add a certificate to the WPACKET */
744 static int ssl_add_cert_to_buf(WPACKET *pkt, X509 *x)
747 unsigned char *outbytes;
749 len = i2d_X509(x, NULL);
751 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
754 if (!WPACKET_sub_allocate_bytes_u24(pkt, len, &outbytes)
755 || i2d_X509(x, &outbytes) != len) {
756 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_INTERNAL_ERROR);
763 /* Add certificate chain to internal SSL BUF_MEM structure */
764 int ssl_add_cert_chain(SSL *s, WPACKET *pkt, CERT_PKEY *cpk)
768 STACK_OF(X509) *extra_certs;
769 STACK_OF(X509) *chain = NULL;
770 X509_STORE *chain_store;
772 if (cpk == NULL || cpk->x509 == NULL)
778 * If we have a certificate specific chain use it, else use parent ctx.
781 extra_certs = cpk->chain;
783 extra_certs = s->ctx->extra_certs;
785 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
787 else if (s->cert->chain_store)
788 chain_store = s->cert->chain_store;
790 chain_store = s->ctx->cert_store;
793 X509_STORE_CTX *xs_ctx = X509_STORE_CTX_new();
795 if (xs_ctx == NULL) {
796 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
799 if (!X509_STORE_CTX_init(xs_ctx, chain_store, x, NULL)) {
800 X509_STORE_CTX_free(xs_ctx);
801 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
805 * It is valid for the chain not to be complete (because normally we
806 * don't include the root cert in the chain). Therefore we deliberately
807 * ignore the error return from this call. We're not actually verifying
808 * the cert - we're just building as much of the chain as we can
810 (void)X509_verify_cert(xs_ctx);
811 /* Don't leave errors in the queue */
813 chain = X509_STORE_CTX_get0_chain(xs_ctx);
814 i = ssl_security_cert_chain(s, chain, NULL, 0);
817 /* Dummy error calls so mkerr generates them */
818 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
819 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
820 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
822 X509_STORE_CTX_free(xs_ctx);
823 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
826 chain_count = sk_X509_num(chain);
827 for (i = 0; i < chain_count; i++) {
828 x = sk_X509_value(chain, i);
830 if (!ssl_add_cert_to_buf(pkt, x)) {
831 X509_STORE_CTX_free(xs_ctx);
835 X509_STORE_CTX_free(xs_ctx);
837 i = ssl_security_cert_chain(s, extra_certs, x, 0);
839 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
842 if (!ssl_add_cert_to_buf(pkt, x))
844 for (i = 0; i < sk_X509_num(extra_certs); i++) {
845 x = sk_X509_value(extra_certs, i);
846 if (!ssl_add_cert_to_buf(pkt, x))
853 /* Build a certificate chain for current certificate */
854 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
856 CERT *c = s ? s->cert : ctx->cert;
857 CERT_PKEY *cpk = c->key;
858 X509_STORE *chain_store = NULL;
859 X509_STORE_CTX *xs_ctx = NULL;
860 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
866 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
869 /* Rearranging and check the chain: add everything to a store */
870 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
871 chain_store = X509_STORE_new();
872 if (chain_store == NULL)
874 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
875 x = sk_X509_value(cpk->chain, i);
876 if (!X509_STORE_add_cert(chain_store, x)) {
877 error = ERR_peek_last_error();
878 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
879 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
884 /* Add EE cert too: it might be self signed */
885 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
886 error = ERR_peek_last_error();
887 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
888 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
894 chain_store = c->chain_store;
896 chain_store = s->ctx->cert_store;
898 chain_store = ctx->cert_store;
900 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
901 untrusted = cpk->chain;
904 xs_ctx = X509_STORE_CTX_new();
905 if (xs_ctx == NULL) {
906 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
909 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
910 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
913 /* Set suite B flags if needed */
914 X509_STORE_CTX_set_flags(xs_ctx,
915 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
917 i = X509_verify_cert(xs_ctx);
918 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
919 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
925 chain = X509_STORE_CTX_get1_chain(xs_ctx);
927 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
928 i = X509_STORE_CTX_get_error(xs_ctx);
929 ERR_add_error_data(2, "Verify error:",
930 X509_verify_cert_error_string(i));
934 /* Remove EE certificate from chain */
935 x = sk_X509_shift(chain);
937 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
938 if (sk_X509_num(chain) > 0) {
939 /* See if last cert is self signed */
940 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
941 if (X509_get_extension_flags(x) & EXFLAG_SS) {
942 x = sk_X509_pop(chain);
948 * Check security level of all CA certificates: EE will have been checked
951 for (i = 0; i < sk_X509_num(chain); i++) {
952 x = sk_X509_value(chain, i);
953 rv = ssl_security_cert(s, ctx, x, 0, 0);
955 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
956 sk_X509_pop_free(chain, X509_free);
961 sk_X509_pop_free(cpk->chain, X509_free);
966 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
967 X509_STORE_free(chain_store);
968 X509_STORE_CTX_free(xs_ctx);
973 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
977 pstore = &c->chain_store;
979 pstore = &c->verify_store;
980 X509_STORE_free(*pstore);
983 X509_STORE_up_ref(store);
987 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
988 int op, int bits, int nid, void *other,
992 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
994 level = SSL_CTX_get_security_level(ctx);
996 level = SSL_get_security_level(s);
1000 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1003 if (op == SSL_SECOP_TMP_DH && bits < 80)
1009 minbits = minbits_table[level - 1];
1011 case SSL_SECOP_CIPHER_SUPPORTED:
1012 case SSL_SECOP_CIPHER_SHARED:
1013 case SSL_SECOP_CIPHER_CHECK:
1015 const SSL_CIPHER *c = other;
1016 /* No ciphers below security level */
1019 /* No unauthenticated ciphersuites */
1020 if (c->algorithm_auth & SSL_aNULL)
1022 /* No MD5 mac ciphersuites */
1023 if (c->algorithm_mac & SSL_MD5)
1025 /* SHA1 HMAC is 160 bits of security */
1026 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1028 /* Level 2: no RC4 */
1029 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1031 /* Level 3: forward secure ciphersuites only */
1032 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1036 case SSL_SECOP_VERSION:
1037 if (!SSL_IS_DTLS(s)) {
1038 /* SSLv3 not allowed at level 2 */
1039 if (nid <= SSL3_VERSION && level >= 2)
1041 /* TLS v1.1 and above only for level 3 */
1042 if (nid <= TLS1_VERSION && level >= 3)
1044 /* TLS v1.2 only for level 4 and above */
1045 if (nid <= TLS1_1_VERSION && level >= 4)
1048 /* DTLS v1.2 only for level 4 and above */
1049 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
1054 case SSL_SECOP_COMPRESSION:
1058 case SSL_SECOP_TICKET:
1069 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
1071 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1074 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1076 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,