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1 /*
2 * ! \file ssl/ssl_cert.c
3 */
4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * All rights reserved.
6 *
7 * This package is an SSL implementation written
8 * by Eric Young (eay@cryptsoft.com).
9 * The implementation was written so as to conform with Netscapes SSL.
10 *
11 * This library is free for commercial and non-commercial use as long as
12 * the following conditions are aheared to. The following conditions
13 * apply to all code found in this distribution, be it the RC4, RSA,
14 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
15 * included with this distribution is covered by the same copyright terms
16 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
17 *
18 * Copyright remains Eric Young's, and as such any Copyright notices in
19 * the code are not to be removed.
20 * If this package is used in a product, Eric Young should be given attribution
21 * as the author of the parts of the library used.
22 * This can be in the form of a textual message at program startup or
23 * in documentation (online or textual) provided with the package.
24 *
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
27 * are met:
28 * 1. Redistributions of source code must retain the copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. All advertising materials mentioning features or use of this software
34 * must display the following acknowledgement:
35 * "This product includes cryptographic software written by
36 * Eric Young (eay@cryptsoft.com)"
37 * The word 'cryptographic' can be left out if the rouines from the library
38 * being used are not cryptographic related :-).
39 * 4. If you include any Windows specific code (or a derivative thereof) from
40 * the apps directory (application code) you must include an acknowledgement:
41 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
42 *
43 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 *
55 * The licence and distribution terms for any publically available version or
56 * derivative of this code cannot be changed. i.e. this code cannot simply be
57 * copied and put under another distribution licence
58 * [including the GNU Public Licence.]
59 */
60 /* ====================================================================
61 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
62 *
63 * Redistribution and use in source and binary forms, with or without
64 * modification, are permitted provided that the following conditions
65 * are met:
66 *
67 * 1. Redistributions of source code must retain the above copyright
68 * notice, this list of conditions and the following disclaimer.
69 *
70 * 2. Redistributions in binary form must reproduce the above copyright
71 * notice, this list of conditions and the following disclaimer in
72 * the documentation and/or other materials provided with the
73 * distribution.
74 *
75 * 3. All advertising materials mentioning features or use of this
76 * software must display the following acknowledgment:
77 * "This product includes software developed by the OpenSSL Project
78 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
79 *
80 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
81 * endorse or promote products derived from this software without
82 * prior written permission. For written permission, please contact
83 * openssl-core@openssl.org.
84 *
85 * 5. Products derived from this software may not be called "OpenSSL"
86 * nor may "OpenSSL" appear in their names without prior written
87 * permission of the OpenSSL Project.
88 *
89 * 6. Redistributions of any form whatsoever must retain the following
90 * acknowledgment:
91 * "This product includes software developed by the OpenSSL Project
92 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
93 *
94 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
95 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
96 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
97 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
98 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
99 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
100 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
101 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
102 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
103 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
104 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
105 * OF THE POSSIBILITY OF SUCH DAMAGE.
106 * ====================================================================
107 *
108 * This product includes cryptographic software written by Eric Young
109 * (eay@cryptsoft.com). This product includes software written by Tim
110 * Hudson (tjh@cryptsoft.com).
111 *
112 */
113 /* ====================================================================
114 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
115 * ECC cipher suite support in OpenSSL originally developed by
116 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
117 */
118
119 #include <stdio.h>
120
121 #include "e_os.h"
122 #ifndef NO_SYS_TYPES_H
123 # include <sys/types.h>
124 #endif
125
126 #include "internal/o_dir.h"
127 #include <openssl/objects.h>
128 #include <openssl/bio.h>
129 #include <openssl/pem.h>
130 #include <openssl/x509v3.h>
131 #ifndef OPENSSL_NO_DH
132 # include <openssl/dh.h>
133 #endif
134 #include <openssl/bn.h>
135 #include "ssl_locl.h"
136
137 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op,
138 int bits, int nid, void *other,
139 void *ex);
140
141 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
142 {
143 static volatile int ssl_x509_store_ctx_idx = -1;
144 int got_write_lock = 0;
145
146 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
147
148 if (ssl_x509_store_ctx_idx < 0) {
149 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
150 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
151 got_write_lock = 1;
152
153 if (ssl_x509_store_ctx_idx < 0) {
154 ssl_x509_store_ctx_idx =
155 X509_STORE_CTX_get_ex_new_index(0, "SSL for verify callback",
156 NULL, NULL, NULL);
157 }
158 }
159
160 if (got_write_lock)
161 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
162 else
163 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
164
165 return ssl_x509_store_ctx_idx;
166 }
167
168 CERT *ssl_cert_new(void)
169 {
170 CERT *ret = OPENSSL_malloc(sizeof(*ret));
171
172 if (ret == NULL) {
173 SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_MALLOC_FAILURE);
174 return (NULL);
175 }
176 memset(ret, 0, sizeof(*ret));
177
178 ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
179 ret->references = 1;
180 ret->sec_cb = ssl_security_default_callback;
181 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
182 ret->sec_ex = NULL;
183 return (ret);
184 }
185
186 CERT *ssl_cert_dup(CERT *cert)
187 {
188 CERT *ret = OPENSSL_malloc(sizeof(*ret));
189 int i;
190
191 if (ret == NULL) {
192 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
193 return (NULL);
194 }
195
196 memset(ret, 0, sizeof(*ret));
197
198 ret->key = &ret->pkeys[cert->key - cert->pkeys];
199
200 #ifndef OPENSSL_NO_RSA
201 if (cert->rsa_tmp != NULL) {
202 RSA_up_ref(cert->rsa_tmp);
203 ret->rsa_tmp = cert->rsa_tmp;
204 }
205 ret->rsa_tmp_cb = cert->rsa_tmp_cb;
206 #endif
207
208 #ifndef OPENSSL_NO_DH
209 if (cert->dh_tmp != NULL) {
210 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
211 if (ret->dh_tmp == NULL) {
212 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
213 goto err;
214 }
215 if (cert->dh_tmp->priv_key) {
216 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
217 if (!b) {
218 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
219 goto err;
220 }
221 ret->dh_tmp->priv_key = b;
222 }
223 if (cert->dh_tmp->pub_key) {
224 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
225 if (!b) {
226 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
227 goto err;
228 }
229 ret->dh_tmp->pub_key = b;
230 }
231 }
232 ret->dh_tmp_cb = cert->dh_tmp_cb;
233 ret->dh_tmp_auto = cert->dh_tmp_auto;
234 #endif
235
236 #ifndef OPENSSL_NO_EC
237 if (cert->ecdh_tmp) {
238 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
239 if (ret->ecdh_tmp == NULL) {
240 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
241 goto err;
242 }
243 }
244 ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
245 ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
246 #endif
247
248 for (i = 0; i < SSL_PKEY_NUM; i++) {
249 CERT_PKEY *cpk = cert->pkeys + i;
250 CERT_PKEY *rpk = ret->pkeys + i;
251 if (cpk->x509 != NULL) {
252 rpk->x509 = cpk->x509;
253 CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
254 }
255
256 if (cpk->privatekey != NULL) {
257 rpk->privatekey = cpk->privatekey;
258 CRYPTO_add(&cpk->privatekey->references, 1, CRYPTO_LOCK_EVP_PKEY);
259 }
260
261 if (cpk->chain) {
262 rpk->chain = X509_chain_up_ref(cpk->chain);
263 if (!rpk->chain) {
264 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
265 goto err;
266 }
267 }
268 if (cert->pkeys[i].serverinfo != NULL) {
269 /* Just copy everything. */
270 ret->pkeys[i].serverinfo =
271 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
272 if (ret->pkeys[i].serverinfo == NULL) {
273 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
274 goto err;
275 }
276 ret->pkeys[i].serverinfo_length =
277 cert->pkeys[i].serverinfo_length;
278 memcpy(ret->pkeys[i].serverinfo,
279 cert->pkeys[i].serverinfo,
280 cert->pkeys[i].serverinfo_length);
281 }
282 }
283
284 ret->references = 1;
285 /* Configured sigalgs copied across */
286 if (cert->conf_sigalgs) {
287 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
288 if (!ret->conf_sigalgs)
289 goto err;
290 memcpy(ret->conf_sigalgs, cert->conf_sigalgs, cert->conf_sigalgslen);
291 ret->conf_sigalgslen = cert->conf_sigalgslen;
292 } else
293 ret->conf_sigalgs = NULL;
294
295 if (cert->client_sigalgs) {
296 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
297 if (!ret->client_sigalgs)
298 goto err;
299 memcpy(ret->client_sigalgs, cert->client_sigalgs,
300 cert->client_sigalgslen);
301 ret->client_sigalgslen = cert->client_sigalgslen;
302 } else
303 ret->client_sigalgs = NULL;
304 /* Shared sigalgs also NULL */
305 ret->shared_sigalgs = NULL;
306 /* Copy any custom client certificate types */
307 if (cert->ctypes) {
308 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
309 if (!ret->ctypes)
310 goto err;
311 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
312 ret->ctype_num = cert->ctype_num;
313 }
314
315 ret->cert_flags = cert->cert_flags;
316
317 ret->cert_cb = cert->cert_cb;
318 ret->cert_cb_arg = cert->cert_cb_arg;
319
320 if (cert->verify_store) {
321 CRYPTO_add(&cert->verify_store->references, 1,
322 CRYPTO_LOCK_X509_STORE);
323 ret->verify_store = cert->verify_store;
324 }
325
326 if (cert->chain_store) {
327 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
328 ret->chain_store = cert->chain_store;
329 }
330
331 ret->sec_cb = cert->sec_cb;
332 ret->sec_level = cert->sec_level;
333 ret->sec_ex = cert->sec_ex;
334
335 if (!custom_exts_copy(&ret->cli_ext, &cert->cli_ext))
336 goto err;
337 if (!custom_exts_copy(&ret->srv_ext, &cert->srv_ext))
338 goto err;
339
340 return (ret);
341
342 err:
343 ssl_cert_free(ret);
344
345 return NULL;
346 }
347
348 /* Free up and clear all certificates and chains */
349
350 void ssl_cert_clear_certs(CERT *c)
351 {
352 int i;
353 if (c == NULL)
354 return;
355 for (i = 0; i < SSL_PKEY_NUM; i++) {
356 CERT_PKEY *cpk = c->pkeys + i;
357 X509_free(cpk->x509);
358 cpk->x509 = NULL;
359 EVP_PKEY_free(cpk->privatekey);
360 cpk->privatekey = NULL;
361 sk_X509_pop_free(cpk->chain, X509_free);
362 cpk->chain = NULL;
363 OPENSSL_free(cpk->serverinfo);
364 cpk->serverinfo = NULL;
365 cpk->serverinfo_length = 0;
366 }
367 }
368
369 void ssl_cert_free(CERT *c)
370 {
371 int i;
372
373 if (c == NULL)
374 return;
375
376 i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
377 #ifdef REF_PRINT
378 REF_PRINT("CERT", c);
379 #endif
380 if (i > 0)
381 return;
382 #ifdef REF_CHECK
383 if (i < 0) {
384 fprintf(stderr, "ssl_cert_free, bad reference count\n");
385 abort(); /* ok */
386 }
387 #endif
388
389 #ifndef OPENSSL_NO_RSA
390 RSA_free(c->rsa_tmp);
391 #endif
392 #ifndef OPENSSL_NO_DH
393 DH_free(c->dh_tmp);
394 #endif
395 #ifndef OPENSSL_NO_EC
396 EC_KEY_free(c->ecdh_tmp);
397 #endif
398
399 ssl_cert_clear_certs(c);
400 OPENSSL_free(c->conf_sigalgs);
401 OPENSSL_free(c->client_sigalgs);
402 OPENSSL_free(c->shared_sigalgs);
403 OPENSSL_free(c->ctypes);
404 X509_STORE_free(c->verify_store);
405 X509_STORE_free(c->chain_store);
406 custom_exts_free(&c->cli_ext);
407 custom_exts_free(&c->srv_ext);
408 OPENSSL_free(c);
409 }
410
411 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
412 {
413 int i, r;
414 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
415 if (!cpk)
416 return 0;
417 sk_X509_pop_free(cpk->chain, X509_free);
418 for (i = 0; i < sk_X509_num(chain); i++) {
419 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
420 if (r != 1) {
421 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
422 return 0;
423 }
424 }
425 cpk->chain = chain;
426 return 1;
427 }
428
429 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
430 {
431 STACK_OF(X509) *dchain;
432 if (!chain)
433 return ssl_cert_set0_chain(s, ctx, NULL);
434 dchain = X509_chain_up_ref(chain);
435 if (!dchain)
436 return 0;
437 if (!ssl_cert_set0_chain(s, ctx, dchain)) {
438 sk_X509_pop_free(dchain, X509_free);
439 return 0;
440 }
441 return 1;
442 }
443
444 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
445 {
446 int r;
447 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
448 if (!cpk)
449 return 0;
450 r = ssl_security_cert(s, ctx, x, 0, 0);
451 if (r != 1) {
452 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
453 return 0;
454 }
455 if (!cpk->chain)
456 cpk->chain = sk_X509_new_null();
457 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
458 return 0;
459 return 1;
460 }
461
462 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
463 {
464 if (!ssl_cert_add0_chain_cert(s, ctx, x))
465 return 0;
466 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
467 return 1;
468 }
469
470 int ssl_cert_select_current(CERT *c, X509 *x)
471 {
472 int i;
473 if (x == NULL)
474 return 0;
475 for (i = 0; i < SSL_PKEY_NUM; i++) {
476 CERT_PKEY *cpk = c->pkeys + i;
477 if (cpk->x509 == x && cpk->privatekey) {
478 c->key = cpk;
479 return 1;
480 }
481 }
482
483 for (i = 0; i < SSL_PKEY_NUM; i++) {
484 CERT_PKEY *cpk = c->pkeys + i;
485 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x)) {
486 c->key = cpk;
487 return 1;
488 }
489 }
490 return 0;
491 }
492
493 int ssl_cert_set_current(CERT *c, long op)
494 {
495 int i, idx;
496 if (!c)
497 return 0;
498 if (op == SSL_CERT_SET_FIRST)
499 idx = 0;
500 else if (op == SSL_CERT_SET_NEXT) {
501 idx = (int)(c->key - c->pkeys + 1);
502 if (idx >= SSL_PKEY_NUM)
503 return 0;
504 } else
505 return 0;
506 for (i = idx; i < SSL_PKEY_NUM; i++) {
507 CERT_PKEY *cpk = c->pkeys + i;
508 if (cpk->x509 && cpk->privatekey) {
509 c->key = cpk;
510 return 1;
511 }
512 }
513 return 0;
514 }
515
516 void ssl_cert_set_cert_cb(CERT *c, int (*cb) (SSL *ssl, void *arg), void *arg)
517 {
518 c->cert_cb = cb;
519 c->cert_cb_arg = arg;
520 }
521
522 SESS_CERT *ssl_sess_cert_new(void)
523 {
524 SESS_CERT *ret;
525
526 ret = OPENSSL_malloc(sizeof(*ret));
527 if (ret == NULL) {
528 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
529 return NULL;
530 }
531
532 memset(ret, 0, sizeof(*ret));
533 ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
534 ret->references = 1;
535
536 return ret;
537 }
538
539 void ssl_sess_cert_free(SESS_CERT *sc)
540 {
541 int i;
542
543 if (sc == NULL)
544 return;
545
546 i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
547 #ifdef REF_PRINT
548 REF_PRINT("SESS_CERT", sc);
549 #endif
550 if (i > 0)
551 return;
552 #ifdef REF_CHECK
553 if (i < 0) {
554 fprintf(stderr, "ssl_sess_cert_free, bad reference count\n");
555 abort(); /* ok */
556 }
557 #endif
558
559 /* i == 0 */
560 sk_X509_pop_free(sc->cert_chain, X509_free);
561 for (i = 0; i < SSL_PKEY_NUM; i++) {
562 X509_free(sc->peer_pkeys[i].x509);
563 #if 0
564 /*
565 * We don't have the peer's private key. This line is just
566 * here as a reminder that we're still using a not-quite-appropriate
567 * data structure.
568 */
569 EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
570 #endif
571 }
572
573 OPENSSL_free(sc);
574 }
575
576 int ssl_set_peer_cert_type(SESS_CERT *sc, int type)
577 {
578 sc->peer_cert_type = type;
579 return (1);
580 }
581
582 int ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
583 {
584 X509 *x;
585 int i;
586 X509_STORE *verify_store;
587 X509_STORE_CTX ctx;
588
589 if (s->cert->verify_store)
590 verify_store = s->cert->verify_store;
591 else
592 verify_store = s->ctx->cert_store;
593
594 if ((sk == NULL) || (sk_X509_num(sk) == 0))
595 return (0);
596
597 x = sk_X509_value(sk, 0);
598 if (!X509_STORE_CTX_init(&ctx, verify_store, x, sk)) {
599 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, ERR_R_X509_LIB);
600 return (0);
601 }
602 /* Set suite B flags if needed */
603 X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
604 X509_STORE_CTX_set_ex_data(&ctx, SSL_get_ex_data_X509_STORE_CTX_idx(), s);
605
606 /*
607 * We need to inherit the verify parameters. These can be determined by
608 * the context: if its a server it will verify SSL client certificates or
609 * vice versa.
610 */
611
612 X509_STORE_CTX_set_default(&ctx, s->server ? "ssl_client" : "ssl_server");
613 /*
614 * Anything non-default in "param" should overwrite anything in the ctx.
615 */
616 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
617
618 if (s->verify_callback)
619 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
620
621 if (s->ctx->app_verify_callback != NULL)
622 i = s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
623 else {
624 i = X509_verify_cert(&ctx);
625 # if 0
626 /* Dummy error calls so mkerr generates them */
627 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
628 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
629 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
630 # endif
631 if (i > 0)
632 i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
633 }
634
635 s->verify_result = ctx.error;
636 X509_STORE_CTX_cleanup(&ctx);
637
638 return (i);
639 }
640
641 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
642 STACK_OF(X509_NAME) *name_list)
643 {
644 sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
645 *ca_list = name_list;
646 }
647
648 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
649 {
650 int i;
651 STACK_OF(X509_NAME) *ret;
652 X509_NAME *name;
653
654 ret = sk_X509_NAME_new_null();
655 for (i = 0; i < sk_X509_NAME_num(sk); i++) {
656 name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
657 if ((name == NULL) || !sk_X509_NAME_push(ret, name)) {
658 sk_X509_NAME_pop_free(ret, X509_NAME_free);
659 return (NULL);
660 }
661 }
662 return (ret);
663 }
664
665 void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
666 {
667 set_client_CA_list(&(s->client_CA), name_list);
668 }
669
670 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
671 {
672 set_client_CA_list(&(ctx->client_CA), name_list);
673 }
674
675 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
676 {
677 return (ctx->client_CA);
678 }
679
680 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
681 {
682 if (s->type == SSL_ST_CONNECT) { /* we are in the client */
683 if (((s->version >> 8) == SSL3_VERSION_MAJOR) && (s->s3 != NULL))
684 return (s->s3->tmp.ca_names);
685 else
686 return (NULL);
687 } else {
688 if (s->client_CA != NULL)
689 return (s->client_CA);
690 else
691 return (s->ctx->client_CA);
692 }
693 }
694
695 static int add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
696 {
697 X509_NAME *name;
698
699 if (x == NULL)
700 return (0);
701 if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
702 return (0);
703
704 if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
705 return (0);
706
707 if (!sk_X509_NAME_push(*sk, name)) {
708 X509_NAME_free(name);
709 return (0);
710 }
711 return (1);
712 }
713
714 int SSL_add_client_CA(SSL *ssl, X509 *x)
715 {
716 return (add_client_CA(&(ssl->client_CA), x));
717 }
718
719 int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
720 {
721 return (add_client_CA(&(ctx->client_CA), x));
722 }
723
724 static int xname_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
725 {
726 return (X509_NAME_cmp(*a, *b));
727 }
728
729 #ifndef OPENSSL_NO_STDIO
730 /**
731 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
732 * it doesn't really have anything to do with clients (except that a common use
733 * for a stack of CAs is to send it to the client). Actually, it doesn't have
734 * much to do with CAs, either, since it will load any old cert.
735 * \param file the file containing one or more certs.
736 * \return a ::STACK containing the certs.
737 */
738 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
739 {
740 BIO *in;
741 X509 *x = NULL;
742 X509_NAME *xn = NULL;
743 STACK_OF(X509_NAME) *ret = NULL, *sk;
744
745 sk = sk_X509_NAME_new(xname_cmp);
746
747 in = BIO_new(BIO_s_file_internal());
748
749 if ((sk == NULL) || (in == NULL)) {
750 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
751 goto err;
752 }
753
754 if (!BIO_read_filename(in, file))
755 goto err;
756
757 for (;;) {
758 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
759 break;
760 if (ret == NULL) {
761 ret = sk_X509_NAME_new_null();
762 if (ret == NULL) {
763 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE, ERR_R_MALLOC_FAILURE);
764 goto err;
765 }
766 }
767 if ((xn = X509_get_subject_name(x)) == NULL)
768 goto err;
769 /* check for duplicates */
770 xn = X509_NAME_dup(xn);
771 if (xn == NULL)
772 goto err;
773 if (sk_X509_NAME_find(sk, xn) >= 0)
774 X509_NAME_free(xn);
775 else {
776 sk_X509_NAME_push(sk, xn);
777 sk_X509_NAME_push(ret, xn);
778 }
779 }
780 goto done;
781
782 err:
783 sk_X509_NAME_pop_free(ret, X509_NAME_free);
784 ret = NULL;
785 done:
786 sk_X509_NAME_free(sk);
787 BIO_free(in);
788 X509_free(x);
789 if (ret != NULL)
790 ERR_clear_error();
791 return (ret);
792 }
793 #endif
794
795 /**
796 * Add a file of certs to a stack.
797 * \param stack the stack to add to.
798 * \param file the file to add from. All certs in this file that are not
799 * already in the stack will be added.
800 * \return 1 for success, 0 for failure. Note that in the case of failure some
801 * certs may have been added to \c stack.
802 */
803
804 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
805 const char *file)
806 {
807 BIO *in;
808 X509 *x = NULL;
809 X509_NAME *xn = NULL;
810 int ret = 1;
811 int (*oldcmp) (const X509_NAME *const *a, const X509_NAME *const *b);
812
813 oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
814
815 in = BIO_new(BIO_s_file_internal());
816
817 if (in == NULL) {
818 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,
819 ERR_R_MALLOC_FAILURE);
820 goto err;
821 }
822
823 if (!BIO_read_filename(in, file))
824 goto err;
825
826 for (;;) {
827 if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
828 break;
829 if ((xn = X509_get_subject_name(x)) == NULL)
830 goto err;
831 xn = X509_NAME_dup(xn);
832 if (xn == NULL)
833 goto err;
834 if (sk_X509_NAME_find(stack, xn) >= 0)
835 X509_NAME_free(xn);
836 else
837 sk_X509_NAME_push(stack, xn);
838 }
839
840 ERR_clear_error();
841 goto done;
842
843 err:
844 ret = 0;
845 done:
846 BIO_free(in);
847 X509_free(x);
848 (void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
849 return ret;
850 }
851
852 /**
853 * Add a directory of certs to a stack.
854 * \param stack the stack to append to.
855 * \param dir the directory to append from. All files in this directory will be
856 * examined as potential certs. Any that are acceptable to
857 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
858 * included.
859 * \return 1 for success, 0 for failure. Note that in the case of failure some
860 * certs may have been added to \c stack.
861 */
862
863 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
864 const char *dir)
865 {
866 OPENSSL_DIR_CTX *d = NULL;
867 const char *filename;
868 int ret = 0;
869
870 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
871
872 /* Note that a side effect is that the CAs will be sorted by name */
873
874 while ((filename = OPENSSL_DIR_read(&d, dir))) {
875 char buf[1024];
876 int r;
877
878 if (strlen(dir) + strlen(filename) + 2 > sizeof buf) {
879 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,
880 SSL_R_PATH_TOO_LONG);
881 goto err;
882 }
883 #ifdef OPENSSL_SYS_VMS
884 r = BIO_snprintf(buf, sizeof buf, "%s%s", dir, filename);
885 #else
886 r = BIO_snprintf(buf, sizeof buf, "%s/%s", dir, filename);
887 #endif
888 if (r <= 0 || r >= (int)sizeof(buf))
889 goto err;
890 if (!SSL_add_file_cert_subjects_to_stack(stack, buf))
891 goto err;
892 }
893
894 if (errno) {
895 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
896 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
897 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
898 goto err;
899 }
900
901 ret = 1;
902
903 err:
904 if (d)
905 OPENSSL_DIR_end(&d);
906 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
907 return ret;
908 }
909
910 /* Add a certificate to a BUF_MEM structure */
911
912 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
913 {
914 int n;
915 unsigned char *p;
916
917 n = i2d_X509(x, NULL);
918 if (!BUF_MEM_grow_clean(buf, (int)(n + (*l) + 3))) {
919 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF, ERR_R_BUF_LIB);
920 return 0;
921 }
922 p = (unsigned char *)&(buf->data[*l]);
923 l2n3(n, p);
924 i2d_X509(x, &p);
925 *l += n + 3;
926
927 return 1;
928 }
929
930 /* Add certificate chain to internal SSL BUF_MEM strcuture */
931 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
932 {
933 BUF_MEM *buf = s->init_buf;
934 int i;
935
936 X509 *x;
937 STACK_OF(X509) *extra_certs;
938 X509_STORE *chain_store;
939
940 /* TLSv1 sends a chain with nothing in it, instead of an alert */
941 if (!BUF_MEM_grow_clean(buf, 10)) {
942 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_BUF_LIB);
943 return 0;
944 }
945
946 if (!cpk || !cpk->x509)
947 return 1;
948
949 x = cpk->x509;
950
951 /*
952 * If we have a certificate specific chain use it, else use parent ctx.
953 */
954 if (cpk->chain)
955 extra_certs = cpk->chain;
956 else
957 extra_certs = s->ctx->extra_certs;
958
959 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
960 chain_store = NULL;
961 else if (s->cert->chain_store)
962 chain_store = s->cert->chain_store;
963 else
964 chain_store = s->ctx->cert_store;
965
966 if (chain_store) {
967 X509_STORE_CTX xs_ctx;
968
969 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, x, NULL)) {
970 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, ERR_R_X509_LIB);
971 return (0);
972 }
973 X509_verify_cert(&xs_ctx);
974 /* Don't leave errors in the queue */
975 ERR_clear_error();
976 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
977 if (i != 1) {
978 X509_STORE_CTX_cleanup(&xs_ctx);
979 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
980 return 0;
981 }
982 for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) {
983 x = sk_X509_value(xs_ctx.chain, i);
984
985 if (!ssl_add_cert_to_buf(buf, l, x)) {
986 X509_STORE_CTX_cleanup(&xs_ctx);
987 return 0;
988 }
989 }
990 X509_STORE_CTX_cleanup(&xs_ctx);
991 } else {
992 i = ssl_security_cert_chain(s, extra_certs, x, 0);
993 if (i != 1) {
994 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
995 return 0;
996 }
997 if (!ssl_add_cert_to_buf(buf, l, x))
998 return 0;
999 for (i = 0; i < sk_X509_num(extra_certs); i++) {
1000 x = sk_X509_value(extra_certs, i);
1001 if (!ssl_add_cert_to_buf(buf, l, x))
1002 return 0;
1003 }
1004 }
1005 return 1;
1006 }
1007
1008 /* Build a certificate chain for current certificate */
1009 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
1010 {
1011 CERT *c = s ? s->cert : ctx->cert;
1012 CERT_PKEY *cpk = c->key;
1013 X509_STORE *chain_store = NULL;
1014 X509_STORE_CTX xs_ctx;
1015 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1016 X509 *x;
1017 int i, rv = 0;
1018 unsigned long error;
1019
1020 if (!cpk->x509) {
1021 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1022 goto err;
1023 }
1024 /* Rearranging and check the chain: add everything to a store */
1025 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK) {
1026 chain_store = X509_STORE_new();
1027 if (!chain_store)
1028 goto err;
1029 for (i = 0; i < sk_X509_num(cpk->chain); i++) {
1030 x = sk_X509_value(cpk->chain, i);
1031 if (!X509_STORE_add_cert(chain_store, x)) {
1032 error = ERR_peek_last_error();
1033 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1034 ERR_GET_REASON(error) !=
1035 X509_R_CERT_ALREADY_IN_HASH_TABLE)
1036 goto err;
1037 ERR_clear_error();
1038 }
1039 }
1040 /* Add EE cert too: it might be self signed */
1041 if (!X509_STORE_add_cert(chain_store, cpk->x509)) {
1042 error = ERR_peek_last_error();
1043 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1044 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1045 goto err;
1046 ERR_clear_error();
1047 }
1048 } else {
1049 if (c->chain_store)
1050 chain_store = c->chain_store;
1051 else if (s)
1052 chain_store = s->ctx->cert_store;
1053 else
1054 chain_store = ctx->cert_store;
1055
1056 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1057 untrusted = cpk->chain;
1058 }
1059
1060 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted)) {
1061 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1062 goto err;
1063 }
1064 /* Set suite B flags if needed */
1065 X509_STORE_CTX_set_flags(&xs_ctx,
1066 c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1067
1068 i = X509_verify_cert(&xs_ctx);
1069 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR) {
1070 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1071 ERR_clear_error();
1072 i = 1;
1073 rv = 2;
1074 }
1075 if (i > 0)
1076 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1077 if (i <= 0) {
1078 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1079 i = X509_STORE_CTX_get_error(&xs_ctx);
1080 ERR_add_error_data(2, "Verify error:",
1081 X509_verify_cert_error_string(i));
1082
1083 X509_STORE_CTX_cleanup(&xs_ctx);
1084 goto err;
1085 }
1086 X509_STORE_CTX_cleanup(&xs_ctx);
1087 /* Remove EE certificate from chain */
1088 x = sk_X509_shift(chain);
1089 X509_free(x);
1090 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT) {
1091 if (sk_X509_num(chain) > 0) {
1092 /* See if last cert is self signed */
1093 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1094 X509_check_purpose(x, -1, 0);
1095 if (x->ex_flags & EXFLAG_SS) {
1096 x = sk_X509_pop(chain);
1097 X509_free(x);
1098 }
1099 }
1100 }
1101 /*
1102 * Check security level of all CA certificates: EE will have been checked
1103 * already.
1104 */
1105 for (i = 0; i < sk_X509_num(chain); i++) {
1106 x = sk_X509_value(chain, i);
1107 rv = ssl_security_cert(s, ctx, x, 0, 0);
1108 if (rv != 1) {
1109 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1110 sk_X509_pop_free(chain, X509_free);
1111 rv = 0;
1112 goto err;
1113 }
1114 }
1115 sk_X509_pop_free(cpk->chain, X509_free);
1116 cpk->chain = chain;
1117 if (rv == 0)
1118 rv = 1;
1119 err:
1120 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1121 X509_STORE_free(chain_store);
1122
1123 return rv;
1124 }
1125
1126 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1127 {
1128 X509_STORE **pstore;
1129 if (chain)
1130 pstore = &c->chain_store;
1131 else
1132 pstore = &c->verify_store;
1133 X509_STORE_free(*pstore);
1134 *pstore = store;
1135 if (ref && store)
1136 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1137 return 1;
1138 }
1139
1140 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op,
1141 int bits, int nid, void *other,
1142 void *ex)
1143 {
1144 int level, minbits;
1145 static const int minbits_table[5] = { 80, 112, 128, 192, 256 };
1146 if (ctx)
1147 level = SSL_CTX_get_security_level(ctx);
1148 else
1149 level = SSL_get_security_level(s);
1150 /* Level 0: anything goes */
1151 if (level <= 0)
1152 return 1;
1153 if (level > 5)
1154 level = 5;
1155 minbits = minbits_table[level - 1];
1156 switch (op) {
1157 case SSL_SECOP_CIPHER_SUPPORTED:
1158 case SSL_SECOP_CIPHER_SHARED:
1159 case SSL_SECOP_CIPHER_CHECK:
1160 {
1161 const SSL_CIPHER *c = other;
1162 /* No ciphers below security level */
1163 if (bits < minbits)
1164 return 0;
1165 /* No unauthenticated ciphersuites */
1166 if (c->algorithm_auth & SSL_aNULL)
1167 return 0;
1168 /* No MD5 mac ciphersuites */
1169 if (c->algorithm_mac & SSL_MD5)
1170 return 0;
1171 /* SHA1 HMAC is 160 bits of security */
1172 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1173 return 0;
1174 /* Level 2: no RC4 */
1175 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1176 return 0;
1177 /* Level 3: forward secure ciphersuites only */
1178 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)))
1179 return 0;
1180 break;
1181 }
1182 case SSL_SECOP_VERSION:
1183 /* SSLv3 not allowed on level 2 */
1184 if (nid <= SSL3_VERSION && level >= 2)
1185 return 0;
1186 /* TLS v1.1 and above only for level 3 */
1187 if (nid <= TLS1_VERSION && level >= 3)
1188 return 0;
1189 /* TLS v1.2 only for level 4 and above */
1190 if (nid <= TLS1_1_VERSION && level >= 4)
1191 return 0;
1192 break;
1193
1194 case SSL_SECOP_COMPRESSION:
1195 if (level >= 2)
1196 return 0;
1197 break;
1198 case SSL_SECOP_TICKET:
1199 if (level >= 3)
1200 return 0;
1201 break;
1202 default:
1203 if (bits < minbits)
1204 return 0;
1205 }
1206 return 1;
1207 }
1208
1209 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1210 {
1211 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1212 }
1213
1214 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1215 {
1216 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other,
1217 ctx->cert->sec_ex);
1218 }