2 * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
12 #include <sys/types.h>
14 #include "internal/nelem.h"
15 #include "internal/o_dir.h"
16 #include <openssl/bio.h>
17 #include <openssl/pem.h>
18 #include <openssl/store.h>
19 #include <openssl/x509v3.h>
20 #include <openssl/dh.h>
21 #include <openssl/bn.h>
22 #include <openssl/crypto.h>
23 #include "internal/refcount.h"
24 #include "ssl_local.h"
25 #include "ssl_cert_table.h"
26 #include "internal/thread_once.h"
27 #ifndef OPENSSL_NO_POSIX_IO
28 # include <sys/stat.h>
33 # define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
38 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
39 int op, int bits, int nid, void *other,
42 static CRYPTO_ONCE ssl_x509_store_ctx_once = CRYPTO_ONCE_STATIC_INIT;
43 static volatile int ssl_x509_store_ctx_idx = -1;
45 DEFINE_RUN_ONCE_STATIC(ssl_x509_store_ctx_init)
47 ssl_x509_store_ctx_idx = X509_STORE_CTX_get_ex_new_index(0,
48 "SSL for verify callback",
50 return ssl_x509_store_ctx_idx >= 0;
53 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
56 if (!RUN_ONCE(&ssl_x509_store_ctx_once, ssl_x509_store_ctx_init))
58 return ssl_x509_store_ctx_idx;
61 CERT *ssl_cert_new(void)
63 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
66 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
70 ret->key = &(ret->pkeys[SSL_PKEY_RSA]);
72 ret->sec_cb = ssl_security_default_callback;
73 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
75 ret->lock = CRYPTO_THREAD_lock_new();
76 if (ret->lock == NULL) {
77 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
85 CERT *ssl_cert_dup(CERT *cert)
87 CERT *ret = OPENSSL_zalloc(sizeof(*ret));
91 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
96 ret->key = &ret->pkeys[cert->key - cert->pkeys];
97 ret->lock = CRYPTO_THREAD_lock_new();
98 if (ret->lock == NULL) {
99 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
104 if (cert->dh_tmp != NULL) {
105 ret->dh_tmp = cert->dh_tmp;
106 EVP_PKEY_up_ref(ret->dh_tmp);
109 ret->dh_tmp_cb = cert->dh_tmp_cb;
110 ret->dh_tmp_auto = cert->dh_tmp_auto;
112 for (i = 0; i < SSL_PKEY_NUM; i++) {
113 CERT_PKEY *cpk = cert->pkeys + i;
114 CERT_PKEY *rpk = ret->pkeys + i;
115 if (cpk->x509 != NULL) {
116 rpk->x509 = cpk->x509;
117 X509_up_ref(rpk->x509);
120 if (cpk->privatekey != NULL) {
121 rpk->privatekey = cpk->privatekey;
122 EVP_PKEY_up_ref(cpk->privatekey);
126 rpk->chain = X509_chain_up_ref(cpk->chain);
128 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
132 if (cert->pkeys[i].serverinfo != NULL) {
133 /* Just copy everything. */
134 ret->pkeys[i].serverinfo =
135 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
136 if (ret->pkeys[i].serverinfo == NULL) {
137 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
140 ret->pkeys[i].serverinfo_length = cert->pkeys[i].serverinfo_length;
141 memcpy(ret->pkeys[i].serverinfo,
142 cert->pkeys[i].serverinfo, cert->pkeys[i].serverinfo_length);
146 /* Configured sigalgs copied across */
147 if (cert->conf_sigalgs) {
148 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
149 * sizeof(*cert->conf_sigalgs));
150 if (ret->conf_sigalgs == NULL)
152 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
153 cert->conf_sigalgslen * sizeof(*cert->conf_sigalgs));
154 ret->conf_sigalgslen = cert->conf_sigalgslen;
156 ret->conf_sigalgs = NULL;
158 if (cert->client_sigalgs) {
159 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen
160 * sizeof(*cert->client_sigalgs));
161 if (ret->client_sigalgs == NULL)
163 memcpy(ret->client_sigalgs, cert->client_sigalgs,
164 cert->client_sigalgslen * sizeof(*cert->client_sigalgs));
165 ret->client_sigalgslen = cert->client_sigalgslen;
167 ret->client_sigalgs = NULL;
168 /* Copy any custom client certificate types */
170 ret->ctype = OPENSSL_memdup(cert->ctype, cert->ctype_len);
171 if (ret->ctype == NULL)
173 ret->ctype_len = cert->ctype_len;
176 ret->cert_flags = cert->cert_flags;
178 ret->cert_cb = cert->cert_cb;
179 ret->cert_cb_arg = cert->cert_cb_arg;
181 if (cert->verify_store) {
182 X509_STORE_up_ref(cert->verify_store);
183 ret->verify_store = cert->verify_store;
186 if (cert->chain_store) {
187 X509_STORE_up_ref(cert->chain_store);
188 ret->chain_store = cert->chain_store;
191 ret->sec_cb = cert->sec_cb;
192 ret->sec_level = cert->sec_level;
193 ret->sec_ex = cert->sec_ex;
195 if (!custom_exts_copy(&ret->custext, &cert->custext))
197 #ifndef OPENSSL_NO_PSK
198 if (cert->psk_identity_hint) {
199 ret->psk_identity_hint = OPENSSL_strdup(cert->psk_identity_hint);
200 if (ret->psk_identity_hint == NULL)
212 /* Free up and clear all certificates and chains */
214 void ssl_cert_clear_certs(CERT *c)
219 for (i = 0; i < SSL_PKEY_NUM; i++) {
220 CERT_PKEY *cpk = c->pkeys + i;
221 X509_free(cpk->x509);
223 EVP_PKEY_free(cpk->privatekey);
224 cpk->privatekey = NULL;
225 sk_X509_pop_free(cpk->chain, X509_free);
227 OPENSSL_free(cpk->serverinfo);
228 cpk->serverinfo = NULL;
229 cpk->serverinfo_length = 0;
233 void ssl_cert_free(CERT *c)
239 CRYPTO_DOWN_REF(&c->references, &i, c->lock);
240 REF_PRINT_COUNT("CERT", c);
243 REF_ASSERT_ISNT(i < 0);
245 EVP_PKEY_free(c->dh_tmp);
247 ssl_cert_clear_certs(c);
248 OPENSSL_free(c->conf_sigalgs);
249 OPENSSL_free(c->client_sigalgs);
250 OPENSSL_free(c->ctype);
251 X509_STORE_free(c->verify_store);
252 X509_STORE_free(c->chain_store);
253 custom_exts_free(&c->custext);
254 #ifndef OPENSSL_NO_PSK
255 OPENSSL_free(c->psk_identity_hint);
257 CRYPTO_THREAD_lock_free(c->lock);
261 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
264 CERT_PKEY *cpk = s != NULL ? s->cert->key : ctx->cert->key;
268 for (i = 0; i < sk_X509_num(chain); i++) {
269 X509 *x = sk_X509_value(chain, i);
271 r = ssl_security_cert(s, ctx, x, 0, 0);
273 ERR_raise(ERR_LIB_SSL, 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 ERR_raise(ERR_LIB_SSL, 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;
376 * Verify a certificate chain
379 * 0: Verify failure or error
382 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
386 X509_STORE *verify_store;
387 X509_STORE_CTX *ctx = NULL;
388 X509_VERIFY_PARAM *param;
390 if ((sk == NULL) || (sk_X509_num(sk) == 0))
393 if (s->cert->verify_store)
394 verify_store = s->cert->verify_store;
396 verify_store = s->ctx->cert_store;
398 ctx = X509_STORE_CTX_new_ex(s->ctx->libctx, s->ctx->propq);
400 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
404 x = sk_X509_value(sk, 0);
405 if (!X509_STORE_CTX_init(ctx, verify_store, x, sk)) {
406 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
409 param = X509_STORE_CTX_get0_param(ctx);
411 * XXX: Separate @AUTHSECLEVEL and @TLSSECLEVEL would be useful at some
412 * point, for now a single @SECLEVEL sets the same policy for TLS crypto
413 * and PKI authentication.
415 X509_VERIFY_PARAM_set_auth_level(param, SSL_get_security_level(s));
417 /* Set suite B flags if needed */
418 X509_STORE_CTX_set_flags(ctx, tls1_suiteb(s));
419 if (!X509_STORE_CTX_set_ex_data
420 (ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s)) {
424 /* Verify via DANE if enabled */
425 if (DANETLS_ENABLED(&s->dane))
426 X509_STORE_CTX_set0_dane(ctx, &s->dane);
429 * We need to inherit the verify parameters. These can be determined by
430 * the context: if its a server it will verify SSL client certificates or
434 X509_STORE_CTX_set_default(ctx, s->server ? "ssl_client" : "ssl_server");
436 * Anything non-default in "s->param" should overwrite anything in the ctx.
438 X509_VERIFY_PARAM_set1(param, s->param);
440 if (s->verify_callback)
441 X509_STORE_CTX_set_verify_cb(ctx, s->verify_callback);
443 if (s->ctx->app_verify_callback != NULL) {
444 i = s->ctx->app_verify_callback(ctx, s->ctx->app_verify_arg);
446 i = X509_verify_cert(ctx);
447 /* We treat an error in the same way as a failure to verify */
452 s->verify_result = X509_STORE_CTX_get_error(ctx);
453 sk_X509_pop_free(s->verified_chain, X509_free);
454 s->verified_chain = NULL;
455 if (X509_STORE_CTX_get0_chain(ctx) != NULL) {
456 s->verified_chain = X509_STORE_CTX_get1_chain(ctx);
457 if (s->verified_chain == NULL) {
458 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
463 /* Move peername from the store context params to the SSL handle's */
464 X509_VERIFY_PARAM_move_peername(s->param, param);
467 X509_STORE_CTX_free(ctx);
471 static void set0_CA_list(STACK_OF(X509_NAME) **ca_list,
472 STACK_OF(X509_NAME) *name_list)
474 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
475 *ca_list = name_list;
478 STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
481 const int num = sk_X509_NAME_num(sk);
482 STACK_OF(X509_NAME) *ret;
485 ret = sk_X509_NAME_new_reserve(NULL, num);
487 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
490 for (i = 0; i < num; i++) {
491 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
493 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
494 sk_X509_NAME_pop_free(ret, X509_NAME_free);
497 sk_X509_NAME_push(ret, name); /* Cannot fail after reserve call */
502 void SSL_set0_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
504 set0_CA_list(&s->ca_names, name_list);
507 void SSL_CTX_set0_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
509 set0_CA_list(&ctx->ca_names, name_list);
512 const STACK_OF(X509_NAME) *SSL_CTX_get0_CA_list(const SSL_CTX *ctx)
514 return ctx->ca_names;
517 const STACK_OF(X509_NAME) *SSL_get0_CA_list(const SSL *s)
519 return s->ca_names != NULL ? s->ca_names : s->ctx->ca_names;
522 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
524 set0_CA_list(&ctx->client_ca_names, name_list);
527 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
529 return ctx->client_ca_names;
532 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
534 set0_CA_list(&s->client_ca_names, name_list);
537 const STACK_OF(X509_NAME) *SSL_get0_peer_CA_list(const SSL *s)
539 return s->s3.tmp.peer_ca_names;
542 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
545 return s->s3.tmp.peer_ca_names;
546 return s->client_ca_names != NULL ? s->client_ca_names
547 : s->ctx->client_ca_names;
550 static int add_ca_name(STACK_OF(X509_NAME) **sk, const X509 *x)
556 if (*sk == NULL && ((*sk = sk_X509_NAME_new_null()) == NULL))
559 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
562 if (!sk_X509_NAME_push(*sk, name)) {
563 X509_NAME_free(name);
569 int SSL_add1_to_CA_list(SSL *ssl, const X509 *x)
571 return add_ca_name(&ssl->ca_names, x);
574 int SSL_CTX_add1_to_CA_list(SSL_CTX *ctx, const X509 *x)
576 return add_ca_name(&ctx->ca_names, x);
580 * The following two are older names are to be replaced with
581 * SSL(_CTX)_add1_to_CA_list
583 int SSL_add_client_CA(SSL *ssl, X509 *x)
585 return add_ca_name(&ssl->client_ca_names, x);
588 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
590 return add_ca_name(&ctx->client_ca_names, x);
593 static int xname_cmp(const X509_NAME *a, const X509_NAME *b)
595 unsigned char *abuf = NULL, *bbuf = NULL;
598 /* X509_NAME_cmp() itself casts away constness in this way, so
601 alen = i2d_X509_NAME((X509_NAME *)a, &abuf);
602 blen = i2d_X509_NAME((X509_NAME *)b, &bbuf);
604 if (alen < 0 || blen < 0)
606 else if (alen != blen)
608 else /* alen == blen */
609 ret = memcmp(abuf, bbuf, alen);
617 static int xname_sk_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
619 return xname_cmp(*a, *b);
622 static unsigned long xname_hash(const X509_NAME *a)
624 /* This returns 0 also if SHA1 is not available */
625 return X509_NAME_hash_ex((X509_NAME *)a, NULL, NULL, NULL);
628 STACK_OF(X509_NAME) *SSL_load_client_CA_file_ex(const char *file,
629 OSSL_LIB_CTX *libctx,
632 BIO *in = BIO_new(BIO_s_file());
634 X509_NAME *xn = NULL;
635 STACK_OF(X509_NAME) *ret = NULL;
636 LHASH_OF(X509_NAME) *name_hash = lh_X509_NAME_new(xname_hash, xname_cmp);
637 OSSL_LIB_CTX *prev_libctx = NULL;
639 if ((name_hash == NULL) || (in == NULL)) {
640 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
644 x = X509_new_ex(libctx, propq);
646 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
649 if (BIO_read_filename(in, file) <= 0)
652 /* Internally lh_X509_NAME_retrieve() needs the libctx to retrieve SHA1 */
653 prev_libctx = OSSL_LIB_CTX_set0_default(libctx);
655 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
658 ret = sk_X509_NAME_new_null();
660 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
664 if ((xn = X509_get_subject_name(x)) == NULL)
666 /* check for duplicates */
667 xn = X509_NAME_dup(xn);
670 if (lh_X509_NAME_retrieve(name_hash, xn) != NULL) {
675 lh_X509_NAME_insert(name_hash, xn);
676 if (!sk_X509_NAME_push(ret, xn))
684 sk_X509_NAME_pop_free(ret, X509_NAME_free);
687 /* restore the old libctx */
688 OSSL_LIB_CTX_set0_default(prev_libctx);
691 lh_X509_NAME_free(name_hash);
697 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
699 return SSL_load_client_CA_file_ex(file, NULL, NULL);
702 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
707 X509_NAME *xn = NULL;
709 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
711 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
713 in = BIO_new(BIO_s_file());
716 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
720 if (BIO_read_filename(in, file) <= 0)
724 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
726 if ((xn = X509_get_subject_name(x)) == NULL)
728 xn = X509_NAME_dup(xn);
731 if (sk_X509_NAME_find(stack, xn) >= 0) {
734 } else if (!sk_X509_NAME_push(stack, xn)) {
748 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
752 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
755 OPENSSL_DIR_CTX *d = NULL;
756 const char *filename;
759 /* Note that a side effect is that the CAs will be sorted by name */
761 while ((filename = OPENSSL_DIR_read(&d, dir))) {
764 #ifndef OPENSSL_NO_POSIX_IO
768 /* Cannot use stat so just skip current and parent directories */
769 if (strcmp(filename, ".") == 0 || strcmp(filename, "..") == 0)
772 if (strlen(dir) + strlen(filename) + 2 > sizeof(buf)) {
773 ERR_raise(ERR_LIB_SSL, SSL_R_PATH_TOO_LONG);
776 #ifdef OPENSSL_SYS_VMS
777 r = BIO_snprintf(buf, sizeof(buf), "%s%s", dir, filename);
779 r = BIO_snprintf(buf, sizeof(buf), "%s/%s", dir, filename);
781 #ifndef OPENSSL_NO_POSIX_IO
782 /* Skip subdirectories */
783 if (!stat(buf, &st) && S_ISDIR(st.st_mode))
786 if (r <= 0 || r >= (int)sizeof(buf))
788 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
793 ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
794 "calling OPENSSL_dir_read(%s)", dir);
795 ERR_raise(ERR_LIB_SSL, ERR_R_SYS_LIB);
808 static int add_uris_recursive(STACK_OF(X509_NAME) *stack,
809 const char *uri, int depth)
812 OSSL_STORE_CTX *ctx = NULL;
814 X509_NAME *xn = NULL;
816 if ((ctx = OSSL_STORE_open(uri, NULL, NULL, NULL, NULL)) == NULL)
819 while (!OSSL_STORE_eof(ctx) && !OSSL_STORE_error(ctx)) {
820 OSSL_STORE_INFO *info = OSSL_STORE_load(ctx);
821 int infotype = info == 0 ? 0 : OSSL_STORE_INFO_get_type(info);
826 if (infotype == OSSL_STORE_INFO_NAME) {
828 * This is an entry in the "directory" represented by the current
829 * uri. if |depth| allows, dive into it.
832 ok = add_uris_recursive(stack, OSSL_STORE_INFO_get0_NAME(info),
834 } else if (infotype == OSSL_STORE_INFO_CERT) {
835 if ((x = OSSL_STORE_INFO_get0_CERT(info)) == NULL
836 || (xn = X509_get_subject_name(x)) == NULL
837 || (xn = X509_NAME_dup(xn)) == NULL)
839 if (sk_X509_NAME_find(stack, xn) >= 0) {
842 } else if (!sk_X509_NAME_push(stack, xn)) {
848 OSSL_STORE_INFO_free(info);
857 OSSL_STORE_close(ctx);
862 int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
865 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b)
866 = sk_X509_NAME_set_cmp_func(stack, xname_sk_cmp);
867 int ret = add_uris_recursive(stack, store, 1);
869 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
873 /* Build a certificate chain for current certificate */
874 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
876 CERT *c = s ? s->cert : ctx->cert;
877 CERT_PKEY *cpk = c->key;
878 X509_STORE *chain_store = NULL;
879 X509_STORE_CTX *xs_ctx = NULL;
880 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
882 SSL_CTX *real_ctx = (s == NULL) ? ctx : s->ctx;
886 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CERTIFICATE_SET);
889 /* Rearranging and check the chain: add everything to a store */
890 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
891 chain_store = X509_STORE_new();
892 if (chain_store == NULL)
894 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
895 x = sk_X509_value(cpk->chain, i);
896 if (!X509_STORE_add_cert(chain_store, x))
899 /* Add EE cert too: it might be self signed */
900 if (!X509_STORE_add_cert(chain_store, cpk->x509))
904 chain_store = c->chain_store;
906 chain_store = s->ctx->cert_store;
908 chain_store = ctx->cert_store;
910 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
911 untrusted = cpk->chain;
914 xs_ctx = X509_STORE_CTX_new_ex(real_ctx->libctx, real_ctx->propq);
915 if (xs_ctx == NULL) {
916 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
919 if (!X509_STORE_CTX_init(xs_ctx, chain_store, cpk->x509, untrusted)) {
920 ERR_raise(ERR_LIB_SSL, ERR_R_X509_LIB);
923 /* Set suite B flags if needed */
924 X509_STORE_CTX_set_flags(xs_ctx,
925 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
927 i = X509_verify_cert(xs_ctx);
928 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
929 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
935 chain = X509_STORE_CTX_get1_chain(xs_ctx);
937 i = X509_STORE_CTX_get_error(xs_ctx);
938 ERR_raise_data(ERR_LIB_SSL, SSL_R_CERTIFICATE_VERIFY_FAILED,
939 "Verify error:%s", X509_verify_cert_error_string(i));
943 /* Remove EE certificate from chain */
944 x = sk_X509_shift(chain);
946 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
947 if (sk_X509_num(chain) > 0) {
948 /* See if last cert is self signed */
949 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
950 if (X509_get_extension_flags(x) & EXFLAG_SS) {
951 x = sk_X509_pop(chain);
957 * Check security level of all CA certificates: EE will have been checked
960 for (i = 0; i < sk_X509_num(chain); i++) {
961 x = sk_X509_value(chain, i);
962 rv = ssl_security_cert(s, ctx, x, 0, 0);
964 ERR_raise(ERR_LIB_SSL, rv);
965 sk_X509_pop_free(chain, X509_free);
970 sk_X509_pop_free(cpk->chain, X509_free);
975 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
976 X509_STORE_free(chain_store);
977 X509_STORE_CTX_free(xs_ctx);
982 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
986 pstore = &c->chain_store;
988 pstore = &c->verify_store;
989 X509_STORE_free(*pstore);
992 X509_STORE_up_ref(store);
996 int ssl_cert_get_cert_store(CERT *c, X509_STORE **pstore, int chain)
998 *pstore = (chain ? c->chain_store : c->verify_store);
1002 int ssl_get_security_level_bits(const SSL *s, const SSL_CTX *ctx, int *levelp)
1006 * note that there's a corresponding minbits_table
1007 * in crypto/x509/x509_vfy.c that's used for checking the security level
1008 * of RSA and DSA keys
1010 static const int minbits_table[5 + 1] = { 0, 80, 112, 128, 192, 256 };
1013 level = SSL_CTX_get_security_level(ctx);
1015 level = SSL_get_security_level(s);
1025 return minbits_table[level];
1028 static int ssl_security_default_callback(const SSL *s, const SSL_CTX *ctx,
1029 int op, int bits, int nid, void *other,
1032 int level, minbits, pfs_mask;
1034 minbits = ssl_get_security_level_bits(s, ctx, &level);
1038 * No EDH keys weaker than 1024-bits even at level 0, otherwise,
1041 if (op == SSL_SECOP_TMP_DH && bits < 80)
1046 case SSL_SECOP_CIPHER_SUPPORTED:
1047 case SSL_SECOP_CIPHER_SHARED:
1048 case SSL_SECOP_CIPHER_CHECK:
1050 const SSL_CIPHER *c = other;
1051 /* No ciphers below security level */
1054 /* No unauthenticated ciphersuites */
1055 if (c->algorithm_auth & SSL_aNULL)
1057 /* No MD5 mac ciphersuites */
1058 if (c->algorithm_mac & SSL_MD5)
1060 /* SHA1 HMAC is 160 bits of security */
1061 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1063 /* Level 2: no RC4 */
1064 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1066 /* Level 3: forward secure ciphersuites only */
1067 pfs_mask = SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK;
1068 if (level >= 3 && c->min_tls != TLS1_3_VERSION &&
1069 !(c->algorithm_mkey & pfs_mask))
1073 case SSL_SECOP_VERSION:
1074 if (!SSL_IS_DTLS(s)) {
1075 /* SSLv3 not allowed at level 2 */
1076 if (nid <= SSL3_VERSION && level >= 2)
1078 /* TLS v1.1 and above only for level 3 */
1079 if (nid <= TLS1_VERSION && level >= 3)
1081 /* TLS v1.2 only for level 4 and above */
1082 if (nid <= TLS1_1_VERSION && level >= 4)
1085 /* DTLS v1.2 only for level 4 and above */
1086 if (DTLS_VERSION_LT(nid, DTLS1_2_VERSION) && level >= 4)
1091 case SSL_SECOP_COMPRESSION:
1095 case SSL_SECOP_TICKET:
1106 int ssl_security(const SSL *s, int op, int bits, int nid, void *other)
1108 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1111 int ssl_ctx_security(const SSL_CTX *ctx, int op, int bits, int nid, void *other)
1113 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,
1117 int ssl_cert_lookup_by_nid(int nid, size_t *pidx)
1121 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1122 if (ssl_cert_info[i].nid == nid) {
1131 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx)
1135 for (i = 0; i < OSSL_NELEM(ssl_cert_info); i++) {
1136 const SSL_CERT_LOOKUP *tmp_lu = &ssl_cert_info[i];
1138 if (EVP_PKEY_is_a(pk, OBJ_nid2sn(tmp_lu->nid))
1139 || EVP_PKEY_is_a(pk, OBJ_nid2ln(tmp_lu->nid))) {
1149 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx)
1151 if (idx >= OSSL_NELEM(ssl_cert_info))
1153 return &ssl_cert_info[idx];