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1 /*! \file ssl/ssl_cert.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECC cipher suite support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115 */
116
117 #include <stdio.h>
118
119 #include "e_os.h"
120 #ifndef NO_SYS_TYPES_H
121 # include <sys/types.h>
122 #endif
123
124 #include "o_dir.h"
125 #include <openssl/objects.h>
126 #include <openssl/bio.h>
127 #include <openssl/pem.h>
128 #include <openssl/x509v3.h>
129 #ifndef OPENSSL_NO_DH
130 #include <openssl/dh.h>
131 #endif
132 #include <openssl/bn.h>
133 #include "ssl_locl.h"
134
135 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex);
136
137 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
138 {
139 static volatile int ssl_x509_store_ctx_idx= -1;
140 int got_write_lock = 0;
141
142 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
143
144 if (ssl_x509_store_ctx_idx < 0)
145 {
146 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
147 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
148 got_write_lock = 1;
149
150 if (ssl_x509_store_ctx_idx < 0)
151 {
152 ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
153 0,"SSL for verify callback",NULL,NULL,NULL);
154 }
155 }
156
157 if (got_write_lock)
158 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
159 else
160 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
161
162 return ssl_x509_store_ctx_idx;
163 }
164
165 void ssl_cert_set_default_md(CERT *cert)
166 {
167 /* Set digest values to defaults */
168 #ifndef OPENSSL_NO_DSA
169 cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
170 #endif
171 #ifndef OPENSSL_NO_RSA
172 cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
173 cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
174 #endif
175 #ifndef OPENSSL_NO_ECDSA
176 cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
177 #endif
178 }
179
180 CERT *ssl_cert_new(void)
181 {
182 CERT *ret;
183
184 ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
185 if (ret == NULL)
186 {
187 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
188 return(NULL);
189 }
190 memset(ret,0,sizeof(CERT));
191
192 ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
193 ret->references=1;
194 ssl_cert_set_default_md(ret);
195 ret->sec_cb = ssl_security_default_callback;
196 ret->sec_level = OPENSSL_TLS_SECURITY_LEVEL;
197 ret->sec_ex = NULL;
198 return(ret);
199 }
200
201 CERT *ssl_cert_dup(CERT *cert)
202 {
203 CERT *ret;
204 int i;
205
206 ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
207 if (ret == NULL)
208 {
209 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
210 return(NULL);
211 }
212
213 memset(ret, 0, sizeof(CERT));
214
215 ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
216 /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
217 * if you find that more readable */
218
219 ret->valid = cert->valid;
220 ret->mask_k = cert->mask_k;
221 ret->mask_a = cert->mask_a;
222 ret->export_mask_k = cert->export_mask_k;
223 ret->export_mask_a = cert->export_mask_a;
224
225 #ifndef OPENSSL_NO_RSA
226 if (cert->rsa_tmp != NULL)
227 {
228 RSA_up_ref(cert->rsa_tmp);
229 ret->rsa_tmp = cert->rsa_tmp;
230 }
231 ret->rsa_tmp_cb = cert->rsa_tmp_cb;
232 #endif
233
234 #ifndef OPENSSL_NO_DH
235 if (cert->dh_tmp != NULL)
236 {
237 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
238 if (ret->dh_tmp == NULL)
239 {
240 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
241 goto err;
242 }
243 if (cert->dh_tmp->priv_key)
244 {
245 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
246 if (!b)
247 {
248 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
249 goto err;
250 }
251 ret->dh_tmp->priv_key = b;
252 }
253 if (cert->dh_tmp->pub_key)
254 {
255 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
256 if (!b)
257 {
258 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
259 goto err;
260 }
261 ret->dh_tmp->pub_key = b;
262 }
263 }
264 ret->dh_tmp_cb = cert->dh_tmp_cb;
265 ret->dh_tmp_auto = cert->dh_tmp_auto;
266 #endif
267
268 #ifndef OPENSSL_NO_ECDH
269 if (cert->ecdh_tmp)
270 {
271 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
272 if (ret->ecdh_tmp == NULL)
273 {
274 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
275 goto err;
276 }
277 }
278 ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
279 ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
280 #endif
281
282 for (i = 0; i < SSL_PKEY_NUM; i++)
283 {
284 CERT_PKEY *cpk = cert->pkeys + i;
285 CERT_PKEY *rpk = ret->pkeys + i;
286 if (cpk->x509 != NULL)
287 {
288 rpk->x509 = cpk->x509;
289 CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
290 }
291
292 if (cpk->privatekey != NULL)
293 {
294 rpk->privatekey = cpk->privatekey;
295 CRYPTO_add(&cpk->privatekey->references, 1,
296 CRYPTO_LOCK_EVP_PKEY);
297
298 switch(i)
299 {
300 /* If there was anything special to do for
301 * certain types of keys, we'd do it here.
302 * (Nothing at the moment, I think.) */
303
304 case SSL_PKEY_RSA_ENC:
305 case SSL_PKEY_RSA_SIGN:
306 /* We have an RSA key. */
307 break;
308
309 case SSL_PKEY_DSA_SIGN:
310 /* We have a DSA key. */
311 break;
312
313 case SSL_PKEY_DH_RSA:
314 case SSL_PKEY_DH_DSA:
315 /* We have a DH key. */
316 break;
317
318 case SSL_PKEY_ECC:
319 /* We have an ECC key */
320 break;
321
322 default:
323 /* Can't happen. */
324 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
325 }
326 }
327
328 if (cpk->chain)
329 {
330 rpk->chain = X509_chain_up_ref(cpk->chain);
331 if (!rpk->chain)
332 {
333 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
334 goto err;
335 }
336 }
337 rpk->valid_flags = 0;
338 #ifndef OPENSSL_NO_TLSEXT
339 if (cert->pkeys[i].serverinfo != NULL)
340 {
341 /* Just copy everything. */
342 ret->pkeys[i].serverinfo =
343 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
344 if (ret->pkeys[i].serverinfo == NULL)
345 {
346 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
347 return NULL;
348 }
349 ret->pkeys[i].serverinfo_length =
350 cert->pkeys[i].serverinfo_length;
351 memcpy(ret->pkeys[i].serverinfo,
352 cert->pkeys[i].serverinfo,
353 cert->pkeys[i].serverinfo_length);
354 }
355 #endif
356 }
357
358 ret->references=1;
359 /* Set digests to defaults. NB: we don't copy existing values as they
360 * will be set during handshake.
361 */
362 ssl_cert_set_default_md(ret);
363 /* Peer sigalgs set to NULL as we get these from handshake too */
364 ret->peer_sigalgs = NULL;
365 ret->peer_sigalgslen = 0;
366 /* Configured sigalgs however we copy across */
367
368 if (cert->conf_sigalgs)
369 {
370 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
371 if (!ret->conf_sigalgs)
372 goto err;
373 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
374 cert->conf_sigalgslen);
375 ret->conf_sigalgslen = cert->conf_sigalgslen;
376 }
377 else
378 ret->conf_sigalgs = NULL;
379
380 if (cert->client_sigalgs)
381 {
382 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
383 if (!ret->client_sigalgs)
384 goto err;
385 memcpy(ret->client_sigalgs, cert->client_sigalgs,
386 cert->client_sigalgslen);
387 ret->client_sigalgslen = cert->client_sigalgslen;
388 }
389 else
390 ret->client_sigalgs = NULL;
391 /* Shared sigalgs also NULL */
392 ret->shared_sigalgs = NULL;
393 /* Copy any custom client certificate types */
394 if (cert->ctypes)
395 {
396 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
397 if (!ret->ctypes)
398 goto err;
399 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
400 ret->ctype_num = cert->ctype_num;
401 }
402
403 ret->cert_flags = cert->cert_flags;
404
405 ret->cert_cb = cert->cert_cb;
406 ret->cert_cb_arg = cert->cert_cb_arg;
407
408 if (cert->verify_store)
409 {
410 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
411 ret->verify_store = cert->verify_store;
412 }
413
414 if (cert->chain_store)
415 {
416 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
417 ret->chain_store = cert->chain_store;
418 }
419
420 ret->ciphers_raw = NULL;
421
422 ret->sec_cb = cert->sec_cb;
423 ret->sec_level = cert->sec_level;
424 ret->sec_ex = cert->sec_ex;
425
426 #ifndef OPENSSL_NO_TLSEXT
427 if (cert->custom_cli_ext_records_count)
428 {
429 ret->custom_cli_ext_records = BUF_memdup(cert->custom_cli_ext_records, sizeof(custom_cli_ext_record) * cert->custom_cli_ext_records_count);
430 if (ret->custom_cli_ext_records == NULL)
431 goto err;
432 ret->custom_cli_ext_records_count =
433 cert->custom_cli_ext_records_count;
434 }
435
436 if (cert->custom_srv_ext_records_count)
437 {
438 ret->custom_srv_ext_records = BUF_memdup(cert->custom_srv_ext_records, sizeof(custom_srv_ext_record) * cert->custom_srv_ext_records_count);
439 if (ret->custom_srv_ext_records == NULL)
440 goto err;
441 ret->custom_srv_ext_records_count =
442 cert->custom_srv_ext_records_count;
443 }
444
445 #endif
446
447 return(ret);
448
449 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
450 err:
451 #endif
452 #ifndef OPENSSL_NO_RSA
453 if (ret->rsa_tmp != NULL)
454 RSA_free(ret->rsa_tmp);
455 #endif
456 #ifndef OPENSSL_NO_DH
457 if (ret->dh_tmp != NULL)
458 DH_free(ret->dh_tmp);
459 #endif
460 #ifndef OPENSSL_NO_ECDH
461 if (ret->ecdh_tmp != NULL)
462 EC_KEY_free(ret->ecdh_tmp);
463 #endif
464
465 #ifndef OPENSSL_NO_TLSEXT
466 if (ret->custom_cli_ext_records)
467 OPENSSL_free(ret->custom_cli_ext_records);
468 if (ret->custom_srv_ext_records)
469 OPENSSL_free(ret->custom_srv_ext_records);
470 #endif
471
472 ssl_cert_clear_certs(ret);
473
474 return NULL;
475 }
476
477 /* Free up and clear all certificates and chains */
478
479 void ssl_cert_clear_certs(CERT *c)
480 {
481 int i;
482 if (c == NULL)
483 return;
484 for (i = 0; i<SSL_PKEY_NUM; i++)
485 {
486 CERT_PKEY *cpk = c->pkeys + i;
487 if (cpk->x509)
488 {
489 X509_free(cpk->x509);
490 cpk->x509 = NULL;
491 }
492 if (cpk->privatekey)
493 {
494 EVP_PKEY_free(cpk->privatekey);
495 cpk->privatekey = NULL;
496 }
497 if (cpk->chain)
498 {
499 sk_X509_pop_free(cpk->chain, X509_free);
500 cpk->chain = NULL;
501 }
502 #ifndef OPENSSL_NO_TLSEXT
503 if (cpk->serverinfo)
504 {
505 OPENSSL_free(cpk->serverinfo);
506 cpk->serverinfo = NULL;
507 cpk->serverinfo_length = 0;
508 }
509 #endif
510 /* Clear all flags apart from explicit sign */
511 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
512 }
513 }
514
515 void ssl_cert_free(CERT *c)
516 {
517 int i;
518
519 if(c == NULL)
520 return;
521
522 i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
523 #ifdef REF_PRINT
524 REF_PRINT("CERT",c);
525 #endif
526 if (i > 0) return;
527 #ifdef REF_CHECK
528 if (i < 0)
529 {
530 fprintf(stderr,"ssl_cert_free, bad reference count\n");
531 abort(); /* ok */
532 }
533 #endif
534
535 #ifndef OPENSSL_NO_RSA
536 if (c->rsa_tmp) RSA_free(c->rsa_tmp);
537 #endif
538 #ifndef OPENSSL_NO_DH
539 if (c->dh_tmp) DH_free(c->dh_tmp);
540 #endif
541 #ifndef OPENSSL_NO_ECDH
542 if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
543 #endif
544
545 ssl_cert_clear_certs(c);
546 if (c->peer_sigalgs)
547 OPENSSL_free(c->peer_sigalgs);
548 if (c->conf_sigalgs)
549 OPENSSL_free(c->conf_sigalgs);
550 if (c->client_sigalgs)
551 OPENSSL_free(c->client_sigalgs);
552 if (c->shared_sigalgs)
553 OPENSSL_free(c->shared_sigalgs);
554 if (c->ctypes)
555 OPENSSL_free(c->ctypes);
556 if (c->verify_store)
557 X509_STORE_free(c->verify_store);
558 if (c->chain_store)
559 X509_STORE_free(c->chain_store);
560 if (c->ciphers_raw)
561 OPENSSL_free(c->ciphers_raw);
562 #ifndef OPENSSL_NO_TLSEXT
563 if (c->custom_cli_ext_records)
564 OPENSSL_free(c->custom_cli_ext_records);
565 if (c->custom_srv_ext_records)
566 OPENSSL_free(c->custom_srv_ext_records);
567 #endif
568 OPENSSL_free(c);
569 }
570
571 int ssl_cert_inst(CERT **o)
572 {
573 /* Create a CERT if there isn't already one
574 * (which cannot really happen, as it is initially created in
575 * SSL_CTX_new; but the earlier code usually allows for that one
576 * being non-existant, so we follow that behaviour, as it might
577 * turn out that there actually is a reason for it -- but I'm
578 * not sure that *all* of the existing code could cope with
579 * s->cert being NULL, otherwise we could do without the
580 * initialization in SSL_CTX_new).
581 */
582
583 if (o == NULL)
584 {
585 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
586 return(0);
587 }
588 if (*o == NULL)
589 {
590 if ((*o = ssl_cert_new()) == NULL)
591 {
592 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
593 return(0);
594 }
595 }
596 return(1);
597 }
598
599 int ssl_cert_set0_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
600 {
601 int i, r;
602 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
603 if (!cpk)
604 return 0;
605 if (cpk->chain)
606 sk_X509_pop_free(cpk->chain, X509_free);
607 for (i = 0; i < sk_X509_num(chain); i++)
608 {
609 r = ssl_security_cert(s, ctx, sk_X509_value(chain, i), 0, 0);
610 if (r != 1)
611 {
612 SSLerr(SSL_F_SSL_CERT_SET0_CHAIN, r);
613 return 0;
614 }
615 }
616 cpk->chain = chain;
617 return 1;
618 }
619
620 int ssl_cert_set1_chain(SSL *s, SSL_CTX *ctx, STACK_OF(X509) *chain)
621 {
622 STACK_OF(X509) *dchain;
623 if (!chain)
624 return ssl_cert_set0_chain(s, ctx, NULL);
625 dchain = X509_chain_up_ref(chain);
626 if (!dchain)
627 return 0;
628 if (!ssl_cert_set0_chain(s, ctx, dchain))
629 {
630 sk_X509_pop_free(dchain, X509_free);
631 return 0;
632 }
633 return 1;
634 }
635
636 int ssl_cert_add0_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
637 {
638 int r;
639 CERT_PKEY *cpk = s ? s->cert->key : ctx->cert->key;
640 if (!cpk)
641 return 0;
642 r = ssl_security_cert(s, ctx, x, 0, 0);
643 if (r != 1)
644 {
645 SSLerr(SSL_F_SSL_CERT_ADD0_CHAIN_CERT, r);
646 return 0;
647 }
648 if (!cpk->chain)
649 cpk->chain = sk_X509_new_null();
650 if (!cpk->chain || !sk_X509_push(cpk->chain, x))
651 return 0;
652 return 1;
653 }
654
655 int ssl_cert_add1_chain_cert(SSL *s, SSL_CTX *ctx, X509 *x)
656 {
657 if (!ssl_cert_add0_chain_cert(s, ctx, x))
658 return 0;
659 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
660 return 1;
661 }
662
663 int ssl_cert_select_current(CERT *c, X509 *x)
664 {
665 int i;
666 if (x == NULL)
667 return 0;
668 for (i = 0; i < SSL_PKEY_NUM; i++)
669 {
670 CERT_PKEY *cpk = c->pkeys + i;
671 if (cpk->x509 == x && cpk->privatekey)
672 {
673 c->key = cpk;
674 return 1;
675 }
676 }
677
678 for (i = 0; i < SSL_PKEY_NUM; i++)
679 {
680 CERT_PKEY *cpk = c->pkeys + i;
681 if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x))
682 {
683 c->key = cpk;
684 return 1;
685 }
686 }
687 return 0;
688 }
689
690 int ssl_cert_set_current(CERT *c, long op)
691 {
692 int i, idx;
693 if (!c)
694 return 0;
695 if (op == SSL_CERT_SET_FIRST)
696 idx = 0;
697 else if (op == SSL_CERT_SET_NEXT)
698 {
699 idx = (int)(c->key - c->pkeys + 1);
700 if (idx >= SSL_PKEY_NUM)
701 return 0;
702 }
703 else
704 return 0;
705 for (i = idx; i < SSL_PKEY_NUM; i++)
706 {
707 CERT_PKEY *cpk = c->pkeys + i;
708 if (cpk->x509 && cpk->privatekey)
709 {
710 c->key = cpk;
711 return 1;
712 }
713 }
714 return 0;
715 }
716
717 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
718 {
719 c->cert_cb = cb;
720 c->cert_cb_arg = arg;
721 }
722
723 SESS_CERT *ssl_sess_cert_new(void)
724 {
725 SESS_CERT *ret;
726
727 ret = OPENSSL_malloc(sizeof *ret);
728 if (ret == NULL)
729 {
730 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
731 return NULL;
732 }
733
734 memset(ret, 0 ,sizeof *ret);
735 ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
736 ret->references = 1;
737
738 return ret;
739 }
740
741 void ssl_sess_cert_free(SESS_CERT *sc)
742 {
743 int i;
744
745 if (sc == NULL)
746 return;
747
748 i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
749 #ifdef REF_PRINT
750 REF_PRINT("SESS_CERT", sc);
751 #endif
752 if (i > 0)
753 return;
754 #ifdef REF_CHECK
755 if (i < 0)
756 {
757 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
758 abort(); /* ok */
759 }
760 #endif
761
762 /* i == 0 */
763 if (sc->cert_chain != NULL)
764 sk_X509_pop_free(sc->cert_chain, X509_free);
765 for (i = 0; i < SSL_PKEY_NUM; i++)
766 {
767 if (sc->peer_pkeys[i].x509 != NULL)
768 X509_free(sc->peer_pkeys[i].x509);
769 #if 0 /* We don't have the peer's private key. These lines are just
770 * here as a reminder that we're still using a not-quite-appropriate
771 * data structure. */
772 if (sc->peer_pkeys[i].privatekey != NULL)
773 EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
774 #endif
775 }
776
777 #ifndef OPENSSL_NO_RSA
778 if (sc->peer_rsa_tmp != NULL)
779 RSA_free(sc->peer_rsa_tmp);
780 #endif
781 #ifndef OPENSSL_NO_DH
782 if (sc->peer_dh_tmp != NULL)
783 DH_free(sc->peer_dh_tmp);
784 #endif
785 #ifndef OPENSSL_NO_ECDH
786 if (sc->peer_ecdh_tmp != NULL)
787 EC_KEY_free(sc->peer_ecdh_tmp);
788 #endif
789
790 OPENSSL_free(sc);
791 }
792
793 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
794 {
795 sc->peer_cert_type = type;
796 return(1);
797 }
798
799 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
800 {
801 X509 *x;
802 int i;
803 X509_STORE *verify_store;
804 X509_STORE_CTX ctx;
805
806 if (s->cert->verify_store)
807 verify_store = s->cert->verify_store;
808 else
809 verify_store = s->ctx->cert_store;
810
811 if ((sk == NULL) || (sk_X509_num(sk) == 0))
812 return(0);
813
814 x=sk_X509_value(sk,0);
815 if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
816 {
817 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
818 return(0);
819 }
820 /* Set suite B flags if needed */
821 X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
822 #if 0
823 if (SSL_get_verify_depth(s) >= 0)
824 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
825 #endif
826 X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
827
828 /* We need to inherit the verify parameters. These can be determined by
829 * the context: if its a server it will verify SSL client certificates
830 * or vice versa.
831 */
832
833 X509_STORE_CTX_set_default(&ctx,
834 s->server ? "ssl_client" : "ssl_server");
835 /* Anything non-default in "param" should overwrite anything in the
836 * ctx.
837 */
838 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
839
840 if (s->verify_callback)
841 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
842
843 if (s->ctx->app_verify_callback != NULL)
844 #if 1 /* new with OpenSSL 0.9.7 */
845 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
846 #else
847 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
848 #endif
849 else
850 {
851 #ifndef OPENSSL_NO_X509_VERIFY
852 i=X509_verify_cert(&ctx);
853 #if 0
854 /* Dummy error calls so mkerr generates them */
855 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_EE_KEY_TOO_SMALL);
856 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_CA_KEY_TOO_SMALL);
857 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_CA_MD_TOO_WEAK);
858 #endif
859 if (i > 0)
860 i = ssl_security_cert_chain(s, ctx.chain, NULL, 1);
861 #else
862 i=0;
863 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
864 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
865 #endif
866 }
867
868 s->verify_result=ctx.error;
869 X509_STORE_CTX_cleanup(&ctx);
870
871 return(i);
872 }
873
874 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
875 {
876 if (*ca_list != NULL)
877 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
878
879 *ca_list=name_list;
880 }
881
882 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
883 {
884 int i;
885 STACK_OF(X509_NAME) *ret;
886 X509_NAME *name;
887
888 ret=sk_X509_NAME_new_null();
889 for (i=0; i<sk_X509_NAME_num(sk); i++)
890 {
891 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
892 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
893 {
894 sk_X509_NAME_pop_free(ret,X509_NAME_free);
895 return(NULL);
896 }
897 }
898 return(ret);
899 }
900
901 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
902 {
903 set_client_CA_list(&(s->client_CA),name_list);
904 }
905
906 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
907 {
908 set_client_CA_list(&(ctx->client_CA),name_list);
909 }
910
911 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
912 {
913 return(ctx->client_CA);
914 }
915
916 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
917 {
918 if (s->type == SSL_ST_CONNECT)
919 { /* we are in the client */
920 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
921 (s->s3 != NULL))
922 return(s->s3->tmp.ca_names);
923 else
924 return(NULL);
925 }
926 else
927 {
928 if (s->client_CA != NULL)
929 return(s->client_CA);
930 else
931 return(s->ctx->client_CA);
932 }
933 }
934
935 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
936 {
937 X509_NAME *name;
938
939 if (x == NULL) return(0);
940 if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
941 return(0);
942
943 if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
944 return(0);
945
946 if (!sk_X509_NAME_push(*sk,name))
947 {
948 X509_NAME_free(name);
949 return(0);
950 }
951 return(1);
952 }
953
954 int SSL_add_client_CA(SSL *ssl,X509 *x)
955 {
956 return(add_client_CA(&(ssl->client_CA),x));
957 }
958
959 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
960 {
961 return(add_client_CA(&(ctx->client_CA),x));
962 }
963
964 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
965 {
966 return(X509_NAME_cmp(*a,*b));
967 }
968
969 #ifndef OPENSSL_NO_STDIO
970 /*!
971 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
972 * it doesn't really have anything to do with clients (except that a common use
973 * for a stack of CAs is to send it to the client). Actually, it doesn't have
974 * much to do with CAs, either, since it will load any old cert.
975 * \param file the file containing one or more certs.
976 * \return a ::STACK containing the certs.
977 */
978 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
979 {
980 BIO *in;
981 X509 *x=NULL;
982 X509_NAME *xn=NULL;
983 STACK_OF(X509_NAME) *ret = NULL,*sk;
984
985 sk=sk_X509_NAME_new(xname_cmp);
986
987 in=BIO_new(BIO_s_file_internal());
988
989 if ((sk == NULL) || (in == NULL))
990 {
991 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
992 goto err;
993 }
994
995 if (!BIO_read_filename(in,file))
996 goto err;
997
998 for (;;)
999 {
1000 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1001 break;
1002 if (ret == NULL)
1003 {
1004 ret = sk_X509_NAME_new_null();
1005 if (ret == NULL)
1006 {
1007 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
1008 goto err;
1009 }
1010 }
1011 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1012 /* check for duplicates */
1013 xn=X509_NAME_dup(xn);
1014 if (xn == NULL) goto err;
1015 if (sk_X509_NAME_find(sk,xn) >= 0)
1016 X509_NAME_free(xn);
1017 else
1018 {
1019 sk_X509_NAME_push(sk,xn);
1020 sk_X509_NAME_push(ret,xn);
1021 }
1022 }
1023
1024 if (0)
1025 {
1026 err:
1027 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
1028 ret=NULL;
1029 }
1030 if (sk != NULL) sk_X509_NAME_free(sk);
1031 if (in != NULL) BIO_free(in);
1032 if (x != NULL) X509_free(x);
1033 if (ret != NULL)
1034 ERR_clear_error();
1035 return(ret);
1036 }
1037 #endif
1038
1039 /*!
1040 * Add a file of certs to a stack.
1041 * \param stack the stack to add to.
1042 * \param file the file to add from. All certs in this file that are not
1043 * already in the stack will be added.
1044 * \return 1 for success, 0 for failure. Note that in the case of failure some
1045 * certs may have been added to \c stack.
1046 */
1047
1048 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1049 const char *file)
1050 {
1051 BIO *in;
1052 X509 *x=NULL;
1053 X509_NAME *xn=NULL;
1054 int ret=1;
1055 int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
1056
1057 oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
1058
1059 in=BIO_new(BIO_s_file_internal());
1060
1061 if (in == NULL)
1062 {
1063 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
1064 goto err;
1065 }
1066
1067 if (!BIO_read_filename(in,file))
1068 goto err;
1069
1070 for (;;)
1071 {
1072 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1073 break;
1074 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1075 xn=X509_NAME_dup(xn);
1076 if (xn == NULL) goto err;
1077 if (sk_X509_NAME_find(stack,xn) >= 0)
1078 X509_NAME_free(xn);
1079 else
1080 sk_X509_NAME_push(stack,xn);
1081 }
1082
1083 ERR_clear_error();
1084
1085 if (0)
1086 {
1087 err:
1088 ret=0;
1089 }
1090 if(in != NULL)
1091 BIO_free(in);
1092 if(x != NULL)
1093 X509_free(x);
1094
1095 (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1096
1097 return ret;
1098 }
1099
1100 /*!
1101 * Add a directory of certs to a stack.
1102 * \param stack the stack to append to.
1103 * \param dir the directory to append from. All files in this directory will be
1104 * examined as potential certs. Any that are acceptable to
1105 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1106 * included.
1107 * \return 1 for success, 0 for failure. Note that in the case of failure some
1108 * certs may have been added to \c stack.
1109 */
1110
1111 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1112 const char *dir)
1113 {
1114 OPENSSL_DIR_CTX *d = NULL;
1115 const char *filename;
1116 int ret = 0;
1117
1118 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1119
1120 /* Note that a side effect is that the CAs will be sorted by name */
1121
1122 while((filename = OPENSSL_DIR_read(&d, dir)))
1123 {
1124 char buf[1024];
1125 int r;
1126
1127 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1128 {
1129 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1130 goto err;
1131 }
1132
1133 #ifdef OPENSSL_SYS_VMS
1134 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1135 #else
1136 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1137 #endif
1138 if (r <= 0 || r >= (int)sizeof(buf))
1139 goto err;
1140 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1141 goto err;
1142 }
1143
1144 if (errno)
1145 {
1146 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1147 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1148 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1149 goto err;
1150 }
1151
1152 ret = 1;
1153
1154 err:
1155 if (d) OPENSSL_DIR_end(&d);
1156 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1157 return ret;
1158 }
1159
1160 /* Add a certificate to a BUF_MEM structure */
1161
1162 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1163 {
1164 int n;
1165 unsigned char *p;
1166
1167 n=i2d_X509(x,NULL);
1168 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1169 {
1170 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1171 return 0;
1172 }
1173 p=(unsigned char *)&(buf->data[*l]);
1174 l2n3(n,p);
1175 i2d_X509(x,&p);
1176 *l+=n+3;
1177
1178 return 1;
1179 }
1180
1181 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1182 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1183 {
1184 BUF_MEM *buf = s->init_buf;
1185 int i;
1186
1187 X509 *x;
1188 STACK_OF(X509) *extra_certs;
1189 X509_STORE *chain_store;
1190
1191 /* TLSv1 sends a chain with nothing in it, instead of an alert */
1192 if (!BUF_MEM_grow_clean(buf,10))
1193 {
1194 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1195 return 0;
1196 }
1197
1198 if (!cpk || !cpk->x509)
1199 return 1;
1200
1201 x = cpk->x509;
1202
1203 /* If we have a certificate specific chain use it, else use
1204 * parent ctx.
1205 */
1206 if (cpk->chain)
1207 extra_certs = cpk->chain;
1208 else
1209 extra_certs = s->ctx->extra_certs;
1210
1211 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1212 chain_store = NULL;
1213 else if (s->cert->chain_store)
1214 chain_store = s->cert->chain_store;
1215 else
1216 chain_store = s->ctx->cert_store;
1217
1218 if (chain_store)
1219 {
1220 X509_STORE_CTX xs_ctx;
1221
1222 if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1223 {
1224 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1225 return(0);
1226 }
1227 X509_verify_cert(&xs_ctx);
1228 /* Don't leave errors in the queue */
1229 ERR_clear_error();
1230 i = ssl_security_cert_chain(s, xs_ctx.chain, NULL, 0);
1231 if (i != 1)
1232 {
1233 X509_STORE_CTX_cleanup(&xs_ctx);
1234 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1235 return 0;
1236 }
1237 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1238 {
1239 x = sk_X509_value(xs_ctx.chain, i);
1240
1241 if (!ssl_add_cert_to_buf(buf, l, x))
1242 {
1243 X509_STORE_CTX_cleanup(&xs_ctx);
1244 return 0;
1245 }
1246 }
1247 X509_STORE_CTX_cleanup(&xs_ctx);
1248 }
1249 else
1250 {
1251 i = ssl_security_cert_chain(s, extra_certs, x, 0);
1252 if (i != 1)
1253 {
1254 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, i);
1255 return 0;
1256 }
1257 if (!ssl_add_cert_to_buf(buf, l, x))
1258 return 0;
1259 for (i=0; i<sk_X509_num(extra_certs); i++)
1260 {
1261 x=sk_X509_value(extra_certs,i);
1262 if (!ssl_add_cert_to_buf(buf, l, x))
1263 return 0;
1264 }
1265 }
1266 return 1;
1267 }
1268
1269 /* Build a certificate chain for current certificate */
1270 int ssl_build_cert_chain(SSL *s, SSL_CTX *ctx, int flags)
1271 {
1272 CERT *c = s ? s->cert : ctx->cert;
1273 CERT_PKEY *cpk = c->key;
1274 X509_STORE *chain_store = NULL;
1275 X509_STORE_CTX xs_ctx;
1276 STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1277 X509 *x;
1278 int i, rv = 0;
1279 unsigned long error;
1280
1281 if (!cpk->x509)
1282 {
1283 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1284 goto err;
1285 }
1286 /* Rearranging and check the chain: add everything to a store */
1287 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1288 {
1289 chain_store = X509_STORE_new();
1290 if (!chain_store)
1291 goto err;
1292 for (i = 0; i < sk_X509_num(cpk->chain); i++)
1293 {
1294 x = sk_X509_value(cpk->chain, i);
1295 if (!X509_STORE_add_cert(chain_store, x))
1296 {
1297 error = ERR_peek_last_error();
1298 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1299 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1300 goto err;
1301 ERR_clear_error();
1302 }
1303 }
1304 /* Add EE cert too: it might be self signed */
1305 if (!X509_STORE_add_cert(chain_store, cpk->x509))
1306 {
1307 error = ERR_peek_last_error();
1308 if (ERR_GET_LIB(error) != ERR_LIB_X509 ||
1309 ERR_GET_REASON(error) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
1310 goto err;
1311 ERR_clear_error();
1312 }
1313 }
1314 else
1315 {
1316 if (c->chain_store)
1317 chain_store = c->chain_store;
1318 else if (s)
1319 chain_store = s->ctx->cert_store;
1320 else
1321 chain_store = ctx->cert_store;
1322
1323 if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1324 untrusted = cpk->chain;
1325 }
1326
1327 if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1328 {
1329 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1330 goto err;
1331 }
1332 /* Set suite B flags if needed */
1333 X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1334
1335 i = X509_verify_cert(&xs_ctx);
1336 if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
1337 {
1338 if (flags & SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR)
1339 ERR_clear_error();
1340 i = 1;
1341 rv = 2;
1342 }
1343 if (i > 0)
1344 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1345 if (i <= 0)
1346 {
1347 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1348 i = X509_STORE_CTX_get_error(&xs_ctx);
1349 ERR_add_error_data(2, "Verify error:",
1350 X509_verify_cert_error_string(i));
1351
1352 X509_STORE_CTX_cleanup(&xs_ctx);
1353 goto err;
1354 }
1355 X509_STORE_CTX_cleanup(&xs_ctx);
1356 /* Remove EE certificate from chain */
1357 x = sk_X509_shift(chain);
1358 X509_free(x);
1359 if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1360 {
1361 if (sk_X509_num(chain) > 0)
1362 {
1363 /* See if last cert is self signed */
1364 x = sk_X509_value(chain, sk_X509_num(chain) - 1);
1365 X509_check_purpose(x, -1, 0);
1366 if (x->ex_flags & EXFLAG_SS)
1367 {
1368 x = sk_X509_pop(chain);
1369 X509_free(x);
1370 }
1371 }
1372 }
1373 /* Check security level of all CA certificates: EE will have been
1374 * checked already.
1375 */
1376 for (i = 0; i < sk_X509_num(chain); i++)
1377 {
1378 x = sk_X509_value(chain, i);
1379 rv = ssl_security_cert(s, ctx, x, 0, 0);
1380 if (rv != 1)
1381 {
1382 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, rv);
1383 sk_X509_pop_free(chain, X509_free);
1384 rv = 0;
1385 goto err;
1386 }
1387 }
1388 if (cpk->chain)
1389 sk_X509_pop_free(cpk->chain, X509_free);
1390 cpk->chain = chain;
1391 if (rv == 0)
1392 rv = 1;
1393 err:
1394 if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
1395 X509_STORE_free(chain_store);
1396
1397 return rv;
1398 }
1399
1400 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1401 {
1402 X509_STORE **pstore;
1403 if (chain)
1404 pstore = &c->chain_store;
1405 else
1406 pstore = &c->verify_store;
1407 if (*pstore)
1408 X509_STORE_free(*pstore);
1409 *pstore = store;
1410 if (ref && store)
1411 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1412 return 1;
1413 }
1414
1415 static int ssl_security_default_callback(SSL *s, SSL_CTX *ctx, int op, int bits, int nid, void *other, void *ex)
1416 {
1417 int level, minbits;
1418 static const int minbits_table[5] = {80, 112, 128, 192, 256};
1419 if (ctx)
1420 level = SSL_CTX_get_security_level(ctx);
1421 else
1422 level = SSL_get_security_level(s);
1423 /* Level 0: anything goes */
1424 if (level <= 0)
1425 return 1;
1426 if (level > 5)
1427 level = 5;
1428 minbits = minbits_table[level - 1];
1429 switch (op)
1430 {
1431 case SSL_SECOP_CIPHER_SUPPORTED:
1432 case SSL_SECOP_CIPHER_SHARED:
1433 case SSL_SECOP_CIPHER_CHECK:
1434 {
1435 const SSL_CIPHER *c = other;
1436 /* No ciphers below security level */
1437 if (bits < minbits)
1438 return 0;
1439 /* No SSLv2 ciphers */
1440 if ((SSL_CIPHER_get_id(c) >> 24) == 0x2)
1441 return 0;
1442 /* No unauthenticated ciphersuites */
1443 if (c->algorithm_auth & SSL_aNULL)
1444 return 0;
1445 /* No MD5 mac ciphersuites */
1446 if (c->algorithm_mac & SSL_MD5)
1447 return 0;
1448 /* SHA1 HMAC is 160 bits of security */
1449 if (minbits > 160 && c->algorithm_mac & SSL_SHA1)
1450 return 0;
1451 /* Level 2: no RC4 */
1452 if (level >= 2 && c->algorithm_enc == SSL_RC4)
1453 return 0;
1454 /* Level 3: forward secure ciphersuites only */
1455 if (level >= 3 && !(c->algorithm_mkey & (SSL_kEDH|SSL_kEECDH)))
1456 return 0;
1457 break;
1458 }
1459 case SSL_SECOP_VERSION:
1460 /* SSLv2 allowed only on level zero */
1461 if (nid == SSL2_VERSION)
1462 return 0;
1463 /* SSLv3 not allowed on level 2 */
1464 if (nid <= SSL3_VERSION && level >= 2)
1465 return 0;
1466 /* TLS v1.1 and above only for level 3 */
1467 if (nid <= TLS1_VERSION && level >= 3)
1468 return 0;
1469 /* TLS v1.2 only for level 4 and above */
1470 if (nid <= TLS1_1_VERSION && level >= 4)
1471 return 0;
1472 break;
1473
1474 case SSL_SECOP_COMPRESSION:
1475 if (level >= 2)
1476 return 0;
1477 break;
1478 case SSL_SECOP_TICKET:
1479 if (level >= 3)
1480 return 0;
1481 break;
1482 case SSL_SECOP_SSL2_COMPAT:
1483 /* SSLv2 compatible client hello only for level zero */
1484 return 0;
1485 default:
1486 if (bits < minbits)
1487 return 0;
1488 }
1489 return 1;
1490 }
1491
1492 int ssl_security(SSL *s, int op, int bits, int nid, void *other)
1493 {
1494 return s->cert->sec_cb(s, NULL, op, bits, nid, other, s->cert->sec_ex);
1495 }
1496
1497 int ssl_ctx_security(SSL_CTX *ctx, int op, int bits, int nid, void *other)
1498 {
1499 return ctx->cert->sec_cb(NULL, ctx, op, bits, nid, other, ctx->cert->sec_ex);
1500 }
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