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, int op,
35 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 #ifndef OPENSSL_NO_DH
101 if (cert->dh_tmp != NULL) {
102 ret->dh_tmp = cert->dh_tmp;
103 EVP_PKEY_up_ref(ret->dh_tmp);
105 ret->dh_tmp_cb = cert->dh_tmp_cb;
106 ret->dh_tmp_auto = cert->dh_tmp_auto;
109 for (i = 0; i < SSL_PKEY_NUM; i++) {
110 CERT_PKEY *cpk = cert->pkeys + i;
111 CERT_PKEY *rpk = ret->pkeys + i;
112 if (cpk->x509 != NULL) {
113 rpk->x509 = cpk->x509;
114 X509_up_ref(rpk->x509);
117 if (cpk->privatekey != NULL) {
118 rpk->privatekey = cpk->privatekey;
119 EVP_PKEY_up_ref(cpk->privatekey);
123 rpk->chain = X509_chain_up_ref(cpk->chain);
125 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
129 if (cert->pkeys[i].serverinfo != NULL) {
130 /* Just copy everything. */
131 ret->pkeys[i].serverinfo =
132 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
133 if (ret->pkeys[i].serverinfo == NULL) {
134 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
137 ret->pkeys[i].serverinfo_length =
138 cert->pkeys[i].serverinfo_length;
139 memcpy(ret->pkeys[i].serverinfo,
140 cert->pkeys[i].serverinfo,
141 cert->pkeys[i].serverinfo_length);
145 /* Configured sigalgs copied across */
146 if (cert->conf_sigalgs) {
147 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
148 if (ret->conf_sigalgs == NULL)
150 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
151 ret->conf_sigalgslen = cert->conf_sigalgslen;
153 ret->conf_sigalgs = NULL;
155 if (cert->client_sigalgs) {
156 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
157 if (ret->client_sigalgs == NULL)
159 memcpy(ret->client_sigalgs, cert->client_sigalgs,
160 cert->client_sigalgslen);
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_atomic_add(&c->references, -1, &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(ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
419 /* Verify via DANE if enabled */
420 if (DANETLS_ENABLED(&s->dane))
421 X509_STORE_CTX_set0_dane(ctx, &s->dane);
424 * We need to inherit the verify parameters. These can be determined by
425 * the context: if its a server it will verify SSL client certificates or
429 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
431 * Anything non-default in "s->param" should overwrite anything in the ctx.
433 X509_VERIFY_PARAM_set1(param, s->param);
435 if (s->verify_callback)
436 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
438 if (s->ctx->app_verify_callback != NULL)
439 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
441 i = X509_verify_cert(ctx);
443 s->verify_result = X509_STORE_CTX_get_error(ctx);
444 sk_X509_pop_free(s->verified_chain, X509_free);
445 s->verified_chain = NULL;
446 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
447 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
448 if (s->verified_chain == NULL) {
449 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
454 /* Move peername from the store context params to the SSL handle's */
455 X509_VERIFY_PARAM_move_peername(s->param, param);
458 X509_STORE_CTX_free(ctx);
462 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
463 STACK_OF(X509_NAME) *name_list)
465 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
466 *ca_list = name_list;
469 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
472 STACK_OF(X509_NAME) *ret;
475 ret = sk_X509_NAME_new_null();
477 SSLerr(SSL_F_SSL_DUP_CA_LIST, ERR_R_MALLOC_FAILURE);
480 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
481 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
482 if (name == NULL || !sk_X509_NAME_push(ret, name)) {
483 sk_X509_NAME_pop_free(ret, X509_NAME_free);
484 X509_NAME_free(name);
491 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
493 set_client_CA_list(&(s->client_CA), name_list);
496 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
498 set_client_CA_list(&(ctx->client_CA), name_list);
501 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
503 return (ctx->client_CA);
506 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
508 if (!s->server) { /* we are in the client */
509 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
510 return (s->s3->tmp.ca_names);
514 if (s->client_CA != NULL)
515 return (s->client_CA);
517 return (s->ctx->client_CA);
521 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
527 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
530 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
533 if (!sk_X509_NAME_push(*sk, name)) {
534 X509_NAME_free(name);
540 int SSL_add_client_CA(SSL *ssl, X509 *x)
542 return (add_client_CA(&(ssl->client_CA), x));
545 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
547 return (add_client_CA(&(ctx->client_CA), x));
550 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
552 return (X509_NAME_cmp(*a, *b));
555 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
557 return X509_NAME_cmp(a, b);
560 static unsigned long xname_hash(const X509_NAME *a)
562 return X509_NAME_hash((X509_NAME *)a);
566 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
567 * it doesn't really have anything to do with clients (except that a common use
568 * for a stack of CAs is to send it to the client). Actually, it doesn't have
569 * much to do with CAs, either, since it will load any old cert.
570 * \param file the file containing one or more certs.
571 * \return a ::STACK containing the certs.
573 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
575 BIO *in = BIO_new(BIO_s_file());
577 X509_NAME *xn = NULL;
578 STACK_OF(X509_NAME) *ret = NULL;
579 LHASH_OF(X509_NAME) *name_hash =
580 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,
655 ERR_R_MALLOC_FAILURE);
659 if (!BIO_read_filename(in, file))
663 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
665 if ((xn = X509_get_subject_name(x)) == NULL)
667 xn = X509_NAME_dup(xn);
670 if (sk_X509_NAME_find(stack, xn) >= 0) {
673 } else if (!sk_X509_NAME_push(stack, xn)) {
687 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
692 * Add a directory of certs to a stack.
693 * \param stack the stack to append to.
694 * \param dir the directory to append from. All files in this directory will be
695 * examined as potential certs. Any that are acceptable to
696 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
698 * \return 1 for success, 0 for failure. Note that in the case of failure some
699 * certs may have been added to \c stack.
702 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
705 OPENSSL_DIR_CTX *d = NULL;
706 const char *filename;
709 /* Note that a side effect is that the CAs will be sorted by name */
711 while ((filename = OPENSSL_DIR_read(&d, dir))) {
715 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
716 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
717 SSL_R_PATH_TOO_LONG);
720 #ifdef OPENSSL_SYS_VMS
721 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
723 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
725 if (r <= 0 || r >= (int)sizeof(buf))
727 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
732 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
733 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
734 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
747 /* Add a certificate to a BUF_MEM structure */
749 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
754 n = i2d_X509(x, NULL);
755 if (n < 0 || !BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
756 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
759 p = (unsigned char *)&(buf->data[*l]);
763 /* Shouldn't happen */
764 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
772 /* Add certificate chain to internal SSL BUF_MEM structure */
773 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
775 BUF_MEM *buf = s->init_buf;
778 STACK_OF(X509) *extra_certs;
779 STACK_OF(X509) *chain = NULL;
780 X509_STORE *chain_store;
782 /* TLSv1 sends a chain with nothing in it, instead of an alert */
783 if (!BUF_MEM_grow_clean(buf, 10)) {
784 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
788 if (!cpk || !cpk->x509)
794 * If we have a certificate specific chain use it, else use parent ctx.
797 extra_certs = cpk->chain;
799 extra_certs = s->ctx->extra_certs;
801 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
803 else if (s->cert->chain_store)
804 chain_store = s->cert->chain_store;
806 chain_store = s->ctx->cert_store;
809 X509_STORE_CTX* xs_ctx = X509_STORE_CTX_new();
811 if (xs_ctx == NULL) {
812 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
815 if (!X509_STORE_CTX_init(xs_ctx, chain_store, x, NULL)) {
816 X509_STORE_CTX_free(xs_ctx);
817 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
821 * It is valid for the chain not to be complete (because normally we
822 * don't include the root cert in the chain). Therefore we deliberately
823 * ignore the error return from this call. We're not actually verifying
824 * the cert - we're just building as much of the chain as we can
826 (void) X509_verify_cert(xs_ctx);
827 /* Don't leave errors in the queue */
829 chain = X509_STORE_CTX_get0_chain(xs_ctx);
830 i = ssl_security_cert_chain(s, chain, NULL, 0);
833 /* Dummy error calls so mkerr generates them */
834 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
835 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
836 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
838 X509_STORE_CTX_free(xs_ctx);
839 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
842 chain_count = sk_X509_num(chain);
843 for (i = 0; i < chain_count; i++) {
844 x = sk_X509_value(chain, i);
846 if (!ssl_add_cert_to_buf(buf, l, x)) {
847 X509_STORE_CTX_free(xs_ctx);
851 X509_STORE_CTX_free(xs_ctx);
853 i = ssl_security_cert_chain(s, extra_certs, x, 0);
855 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
858 if (!ssl_add_cert_to_buf(buf, l, x))
860 for (i = 0; i < sk_X509_num(extra_certs); i++) {
861 x = sk_X509_value(extra_certs, i);
862 if (!ssl_add_cert_to_buf(buf, l, x))
869 /* Build a certificate chain for current certificate */
870 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
872 CERT *c = s ? s->cert : ctx->cert;
873 CERT_PKEY *cpk = c->key;
874 X509_STORE *chain_store = NULL;
875 X509_STORE_CTX *xs_ctx = NULL;
876 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
882 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
885 /* Rearranging and check the chain: add everything to a store */
886 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
887 chain_store = X509_STORE_new();
888 if (chain_store == NULL)
890 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
891 x = sk_X509_value(cpk->chain, i);
892 if (!X509_STORE_add_cert(chain_store, x)) {
893 error = ERR_peek_last_error();
894 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
895 ERR_GET_REASON(error) !=
896 X509_R_CERT_ALREADY_IN_HASH_TABLE)
901 /* Add EE cert too: it might be self signed */
902 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
903 error = ERR_peek_last_error();
904 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
905 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
911 chain_store = c->chain_store;
913 chain_store = s->ctx->cert_store;
915 chain_store = ctx->cert_store;
917 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
918 untrusted = cpk->chain;
921 xs_ctx = X509_STORE_CTX_new();
922 if (xs_ctx == NULL) {
923 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_MALLOC_FAILURE);
926 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
927 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
930 /* Set suite B flags if needed */
931 X509_STORE_CTX_set_flags(xs_ctx,
932 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
934 i = X509_verify_cert(xs_ctx);
935 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
936 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
942 chain = X509_STORE_CTX_get1_chain(xs_ctx);
944 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
945 i = X509_STORE_CTX_get_error(xs_ctx);
946 ERR_add_error_data(2, "Verify error:",
947 X509_verify_cert_error_string(i));
951 /* Remove EE certificate from chain */
952 x = sk_X509_shift(chain);
954 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
955 if (sk_X509_num(chain) > 0) {
956 /* See if last cert is self signed */
957 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
958 if (X509_get_extension_flags(x) & EXFLAG_SS) {
959 x = sk_X509_pop(chain);
965 * Check security level of all CA certificates: EE will have been checked
968 for (i = 0; i < sk_X509_num(chain); i++) {
969 x = sk_X509_value(chain, i);
970 rv = ssl_security_cert(s, ctx, x, 0, 0);
972 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
973 sk_X509_pop_free(chain, X509_free);
978 sk_X509_pop_free(cpk->chain, X509_free);
983 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
984 X509_STORE_free(chain_store);
985 X509_STORE_CTX_free(xs_ctx);
990 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
994 pstore = &c->chain_store;
996 pstore = &c->verify_store;
997 X509_STORE_free(*pstore);
1000 X509_STORE_up_ref(store);
1004 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx, int op,
1005 int bits, int nid, void *other,
1009 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1011 level = SSL_CTX_get_security_level(ctx);
1013 level = SSL_get_security_level(s);
1017 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1020 if (op == SSL_SECOP_TMP_DH && bits < 80)
1026 minbits = minbits_table[level - 1];
1028 case SSL_SECOP_CIPHER_SUPPORTED:
1029 case SSL_SECOP_CIPHER_SHARED:
1030 case SSL_SECOP_CIPHER_CHECK:
1032 const SSL_CIPHER *c = other;
1033 /* No ciphers below security level */
1036 /* No unauthenticated ciphersuites */
1037 if (c->algorithm_auth & SSL_aNULL)
1039 /* No MD5 mac ciphersuites */
1040 if (c->algorithm_mac & SSL_MD5)
1042 /* SHA1 HMAC is 160 bits of security */
1043 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1045 /* Level 2: no RC4 */
1046 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1048 /* Level 3: forward secure ciphersuites only */
1049 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1053 case SSL_SECOP_VERSION:
1054 if (!SSL_IS_DTLS(s)) {
1055 /* SSLv3 not allowed at level 2 */
1056 if (nid <= SSL3_VERSION && level >= 2)
1058 /* TLS v1.1 and above only for level 3 */
1059 if (nid <= TLS1_VERSION && level >= 3)
1061 /* TLS v1.2 only for level 4 and above */
1062 if (nid <= TLS1_1_VERSION && level >= 4)
1065 /* DTLS v1.2 only for level 4 and above */
1066 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
1071 case SSL_SECOP_COMPRESSION:
1075 case SSL_SECOP_TICKET:
1086 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
1088 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1091 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1093 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,