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 * sizeof(*cert->conf_sigalgs));
146 if (ret->conf_sigalgs == NULL)
148 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
149 cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs));
150 ret->conf_sigalgslen = cert->conf_sigalgslen;
152 ret->conf_sigalgs = NULL;
154 if (cert->client_sigalgs) {
155 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen
156 * sizeof(*cert->client_sigalgs));
157 if (ret->client_sigalgs == NULL)
159 memcpy(ret->client_sigalgs, cert->client_sigalgs,
160 cert->client_sigalgslen * sizeof(*cert->client_sigalgs));
161 ret->client_sigalgslen = cert->client_sigalgslen;
163 ret->client_sigalgs = NULL;
164 /* Shared sigalgs also NULL */
165 ret->shared_sigalgs = NULL;
166 /* Copy any custom client certificate types */
168 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
169 if (ret->ctypes == NULL)
171 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
172 ret->ctype_num = cert->ctype_num;
175 ret->cert_flags = cert->cert_flags;
177 ret->cert_cb = cert->cert_cb;
178 ret->cert_cb_arg = cert->cert_cb_arg;
180 if (cert->verify_store) {
181 X509_STORE_up_ref(cert->verify_store);
182 ret->verify_store = cert->verify_store;
185 if (cert->chain_store) {
186 X509_STORE_up_ref(cert->chain_store);
187 ret->chain_store = cert->chain_store;
190 ret->sec_cb = cert->sec_cb;
191 ret->sec_level = cert->sec_level;
192 ret->sec_ex = cert->sec_ex;
194 if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
196 if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
198 #ifndef OPENSSL_NO_PSK
199 if (cert->psk_identity_hint) {
200 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint);
201 if (ret->psk_identity_hint == NULL)
213 /* Free up and clear all certificates and chains */
215 void ssl_cert_clear_certs(CERT *c)
220 for (i = 0; i < SSL_PKEY_NUM; i++) {
221 CERT_PKEY *cpk = c->pkeys + i;
222 X509_free(cpk->x509);
224 EVP_PKEY_free(cpk->privatekey);
225 cpk->privatekey = NULL;
226 sk_X509_pop_free(cpk->chain, X509_free);
228 OPENSSL_free(cpk->serverinfo);
229 cpk->serverinfo = NULL;
230 cpk->serverinfo_length = 0;
234 void ssl_cert_free(CERT *c)
241 CRYPTO_DOWN_REF(&c->references, &i, c->lock);
242 REF_PRINT_COUNT("CERT", c);
245 REF_ASSERT_ISNT(i < 0);
247 #ifndef OPENSSL_NO_DH
248 EVP_PKEY_free(c->dh_tmp);
251 ssl_cert_clear_certs(c);
252 OPENSSL_free(c->conf_sigalgs);
253 OPENSSL_free(c->client_sigalgs);
254 OPENSSL_free(c->shared_sigalgs);
255 OPENSSL_free(c->ctypes);
256 X509_STORE_free(c->verify_store);
257 X509_STORE_free(c->chain_store);
258 custom_exts_free(&c->cli_ext);
259 custom_exts_free(&c->srv_ext);
260 #ifndef OPENSSL_NO_PSK
261 OPENSSL_free(c->psk_identity_hint);
263 CRYPTO_THREAD_lock_free(c->lock);
267 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
270 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
273 for (i = 0; i < sk_X509_num(chain); i++) {
274 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
276 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
280 sk_X509_pop_free(cpk->chain, X509_free);
285 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
287 STACK_OF(X509) *dchain;
289 return ssl_cert_set0_chain(s, ctx, NULL);
290 dchain = X509_chain_up_ref(chain);
293 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
294 sk_X509_pop_free(dchain, X509_free);
300 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
303 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
306 r = ssl_security_cert(s, ctx, x, 0, 0);
308 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
312 cpk->chain = sk_X509_new_null();
313 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
318 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
320 if (!ssl_cert_add0_chain_cert(s, ctx, x))
326 int ssl_cert_select_current(CERT *c, X509 *x)
331 for (i = 0; i < SSL_PKEY_NUM; i++) {
332 CERT_PKEY *cpk = c->pkeys + i;
333 if (cpk->x509 == x && cpk->privatekey) {
339 for (i = 0; i < SSL_PKEY_NUM; i++) {
340 CERT_PKEY *cpk = c->pkeys + i;
341 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
349 int ssl_cert_set_current(CERT *c, long op)
354 if (op == SSL_CERT_SET_FIRST)
356 else if (op == SSL_CERT_SET_NEXT) {
357 idx = (int)(c->key - c->pkeys + 1);
358 if (idx >= SSL_PKEY_NUM)
362 for (i = idx; i < SSL_PKEY_NUM; i++) {
363 CERT_PKEY *cpk = c->pkeys + i;
364 if (cpk->x509 && cpk->privatekey) {
372 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
375 c->cert_cb_arg = arg;
378 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
382 X509_STORE *verify_store;
383 X509_STORE_CTX *ctx = NULL;
384 X509_VERIFY_PARAM *param;
386 if ((sk == NULL) || (sk_X509_num(sk) == 0))
389 if (s->cert->verify_store)
390 verify_store = s->cert->verify_store;
392 verify_store = s->ctx->cert_store;
394 ctx = X509_STORE_CTX_new();
396 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
400 x = sk_X509_value(sk, 0);
401 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
402 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
405 param = X509_STORE_CTX_get0_param(ctx);
407 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
408 * point, for now a single @SECLEVEL sets the same policy for TLS crypto
409 * and PKI authentication.
411 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s));
413 /* Set suite B flags if needed */
414 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
415 if (!X509_STORE_CTX_set_ex_data
416 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
420 /* Verify via DANE if enabled */
421 if (DANETLS_ENABLED(&s->dane))
422 X509_STORE_CTX_set0_dane(ctx, &s->dane);
425 * We need to inherit the verify parameters. These can be determined by
426 * the context: if its a server it will verify SSL client certificates or
430 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
432 * Anything non-default in "s->param" should overwrite anything in the ctx.
434 X509_VERIFY_PARAM_set1(param, s->param);
436 if (s->verify_callback)
437 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
439 if (s->ctx->app_verify_callback != NULL)
440 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
442 i = X509_verify_cert(ctx);
444 s->verify_result = X509_STORE_CTX_get_error(ctx);
445 sk_X509_pop_free(s->verified_chain, X509_free);
446 s->verified_chain = NULL;
447 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
448 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
449 if (s->verified_chain == NULL) {
450 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
455 /* Move peername from the store context params to the SSL handle's */
456 X509_VERIFY_PARAM_move_peername(s->param, param);
459 X509_STORE_CTX_free(ctx);
463 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
464 STACK_OF(X509_NAME) *name_list)
466 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
467 *ca_list = name_list;
470 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
473 STACK_OF(X509_NAME) *ret;
476 ret = sk_X509_NAME_new_null();
478 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
481 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
482 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
483 if (name == NULL || !sk_X509_NAME_push(ret, name)) {
484 sk_X509_NAME_pop_free(ret, X509_NAME_free);
485 X509_NAME_free(name);
492 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
494 set_client_CA_list(&(s->client_CA), name_list);
497 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
499 set_client_CA_list(&(ctx->client_CA), name_list);
502 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
504 return (ctx->client_CA);
507 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
509 if (!s->server) { /* we are in the client */
510 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
511 return (s->s3->tmp.ca_names);
515 if (s->client_CA != NULL)
516 return (s->client_CA);
518 return (s->ctx->client_CA);
522 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
528 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
531 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
534 if (!sk_X509_NAME_push(*sk, name)) {
535 X509_NAME_free(name);
541 int SSL_add_client_CA(SSL *ssl, X509 *x)
543 return (add_client_CA(&(ssl->client_CA), x));
546 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
548 return (add_client_CA(&(ctx->client_CA), x));
551 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
553 return (X509_NAME_cmp(*a, *b));
556 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
558 return X509_NAME_cmp(a, b);
561 static unsigned long xname_hash(const X509_NAME *a)
563 return X509_NAME_hash((X509_NAME *)a);
567 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
568 * it doesn't really have anything to do with clients (except that a common use
569 * for a stack of CAs is to send it to the client). Actually, it doesn't have
570 * much to do with CAs, either, since it will load any old cert.
571 * \param file the file containing one or more certs.
572 * \return a ::STACK containing the certs.
574 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
576 BIO *in = BIO_new(BIO_s_file());
578 X509_NAME *xn = NULL;
579 STACK_OF(X509_NAME) *ret = NULL;
580 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp);
582 if ((name_hash == NULL) || (in == NULL)) {
583 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
587 if (!BIO_read_filename(in, file))
591 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
594 ret = sk_X509_NAME_new_null();
596 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
600 if ((xn = X509_get_subject_name(x)) == NULL)
602 /* check for duplicates */
603 xn = X509_NAME_dup(xn);
606 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
611 lh_X509_NAME_insert(name_hash, xn);
612 if (!sk_X509_NAME_push(ret, xn))
620 sk_X509_NAME_pop_free(ret, X509_NAME_free);
625 lh_X509_NAME_free(name_hash);
632 * Add a file of certs to a stack.
633 * \param stack the stack to add to.
634 * \param file the file to add from. All certs in this file that are not
635 * already in the stack will be added.
636 * \return 1 for success, 0 for failure. Note that in the case of failure some
637 * certs may have been added to \c stack.
640 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
645 X509_NAME *xn = NULL;
647 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
649 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
651 in = BIO_new(BIO_s_file());
654 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK, ERR_R_MALLOC_FAILURE);
658 if (!BIO_read_filename(in, file))
662 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
664 if ((xn = X509_get_subject_name(x)) == NULL)
666 xn = X509_NAME_dup(xn);
669 if (sk_X509_NAME_find(stack, xn) >= 0) {
672 } else if (!sk_X509_NAME_push(stack, xn)) {
686 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
691 * Add a directory of certs to a stack.
692 * \param stack the stack to append to.
693 * \param dir the directory to append from. All files in this directory will be
694 * examined as potential certs. Any that are acceptable to
695 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
697 * \return 1 for success, 0 for failure. Note that in the case of failure some
698 * certs may have been added to \c stack.
701 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
704 OPENSSL_DIR_CTX *d = NULL;
705 const char *filename;
708 /* Note that a side effect is that the CAs will be sorted by name */
710 while ((filename = OPENSSL_DIR_read(&d, dir))) {
714 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
715 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
716 SSL_R_PATH_TOO_LONG);
719 #ifdef OPENSSL_SYS_VMS
720 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
722 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
724 if (r <= 0 || r >= (int)sizeof(buf))
726 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
731 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
732 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
733 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
746 /* Build a certificate chain for current certificate */
747 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
749 CERT *c = s ? s->cert : ctx->cert;
750 CERT_PKEY *cpk = c->key;
751 X509_STORE *chain_store = NULL;
752 X509_STORE_CTX *xs_ctx = NULL;
753 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
759 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
762 /* Rearranging and check the chain: add everything to a store */
763 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
764 chain_store = X509_STORE_new();
765 if (chain_store == NULL)
767 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
768 x = sk_X509_value(cpk->chain, i);
769 if (!X509_STORE_add_cert(chain_store, x)) {
770 error = ERR_peek_last_error();
771 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
772 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
777 /* Add EE cert too: it might be self signed */
778 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
779 error = ERR_peek_last_error();
780 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
781 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
787 chain_store = c->chain_store;
789 chain_store = s->ctx->cert_store;
791 chain_store = ctx->cert_store;
793 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
794 untrusted = cpk->chain;
797 xs_ctx = X509_STORE_CTX_new();
798 if (xs_ctx == NULL) {
799 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
802 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
803 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
806 /* Set suite B flags if needed */
807 X509_STORE_CTX_set_flags(xs_ctx,
808 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
810 i = X509_verify_cert(xs_ctx);
811 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
812 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
818 chain = X509_STORE_CTX_get1_chain(xs_ctx);
820 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
821 i = X509_STORE_CTX_get_error(xs_ctx);
822 ERR_add_error_data(2, "Verify error:",
823 X509_verify_cert_error_string(i));
827 /* Remove EE certificate from chain */
828 x = sk_X509_shift(chain);
830 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
831 if (sk_X509_num(chain) > 0) {
832 /* See if last cert is self signed */
833 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
834 if (X509_get_extension_flags(x) & EXFLAG_SS) {
835 x = sk_X509_pop(chain);
841 * Check security level of all CA certificates: EE will have been checked
844 for (i = 0; i < sk_X509_num(chain); i++) {
845 x = sk_X509_value(chain, i);
846 rv = ssl_security_cert(s, ctx, x, 0, 0);
848 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
849 sk_X509_pop_free(chain, X509_free);
854 sk_X509_pop_free(cpk->chain, X509_free);
859 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
860 X509_STORE_free(chain_store);
861 X509_STORE_CTX_free(xs_ctx);
866 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
870 pstore = &c->chain_store;
872 pstore = &c->verify_store;
873 X509_STORE_free(*pstore);
876 X509_STORE_up_ref(store);
880 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
881 int op, int bits, int nid, void *other,
885 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
887 level = SSL_CTX_get_security_level(ctx);
889 level = SSL_get_security_level(s);
893 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
896 if (op == SSL_SECOP_TMP_DH && bits < 80)
902 minbits = minbits_table[level - 1];
904 case SSL_SECOP_CIPHER_SUPPORTED:
905 case SSL_SECOP_CIPHER_SHARED:
906 case SSL_SECOP_CIPHER_CHECK:
908 const SSL_CIPHER *c = other;
909 /* No ciphers below security level */
912 /* No unauthenticated ciphersuites */
913 if (c->algorithm_auth & SSL_aNULL)
915 /* No MD5 mac ciphersuites */
916 if (c->algorithm_mac & SSL_MD5)
918 /* SHA1 HMAC is 160 bits of security */
919 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
921 /* Level 2: no RC4 */
922 if (level >= 2 && c->algorithm_enc == SSL_RC4)
924 /* Level 3: forward secure ciphersuites only */
925 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
929 case SSL_SECOP_VERSION:
930 if (!SSL_IS_DTLS(s)) {
931 /* SSLv3 not allowed at level 2 */
932 if (nid <= SSL3_VERSION && level >= 2)
934 /* TLS v1.1 and above only for level 3 */
935 if (nid <= TLS1_VERSION && level >= 3)
937 /* TLS v1.2 only for level 4 and above */
938 if (nid <= TLS1_1_VERSION && level >= 4)
941 /* DTLS v1.2 only for level 4 and above */
942 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
947 case SSL_SECOP_COMPRESSION:
951 case SSL_SECOP_TICKET:
962 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
964 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
967 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
969 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,