Extend DTLS method macros.
[openssl.git] / ssl / ssl_cert.c
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 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
136         {
137         static volatile int ssl_x509_store_ctx_idx= -1;
138         int got_write_lock = 0;
139
140         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
141
142         if (ssl_x509_store_ctx_idx < 0)
143                 {
144                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
145                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
146                 got_write_lock = 1;
147                 
148                 if (ssl_x509_store_ctx_idx < 0)
149                         {
150                         ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
151                                 0,"SSL for verify callback",NULL,NULL,NULL);
152                         }
153                 }
154
155         if (got_write_lock)
156                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
157         else
158                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
159         
160         return ssl_x509_store_ctx_idx;
161         }
162
163 void ssl_cert_set_default_md(CERT *cert)
164         {
165         /* Set digest values to defaults */
166 #ifndef OPENSSL_NO_DSA
167         cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
168 #endif
169 #ifndef OPENSSL_NO_RSA
170         cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
171         cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
172 #endif
173 #ifndef OPENSSL_NO_ECDSA
174         cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
175 #endif
176         }
177
178 CERT *ssl_cert_new(void)
179         {
180         CERT *ret;
181
182         ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
183         if (ret == NULL)
184                 {
185                 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
186                 return(NULL);
187                 }
188         memset(ret,0,sizeof(CERT));
189
190         ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
191         ret->references=1;
192         ssl_cert_set_default_md(ret);
193         return(ret);
194         }
195
196 CERT *ssl_cert_dup(CERT *cert)
197         {
198         CERT *ret;
199         int i;
200
201         ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
202         if (ret == NULL)
203                 {
204                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
205                 return(NULL);
206                 }
207
208         memset(ret, 0, sizeof(CERT));
209
210         ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
211         /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
212          * if you find that more readable */
213
214         ret->valid = cert->valid;
215         ret->mask_k = cert->mask_k;
216         ret->mask_a = cert->mask_a;
217         ret->export_mask_k = cert->export_mask_k;
218         ret->export_mask_a = cert->export_mask_a;
219
220 #ifndef OPENSSL_NO_RSA
221         if (cert->rsa_tmp != NULL)
222                 {
223                 RSA_up_ref(cert->rsa_tmp);
224                 ret->rsa_tmp = cert->rsa_tmp;
225                 }
226         ret->rsa_tmp_cb = cert->rsa_tmp_cb;
227 #endif
228
229 #ifndef OPENSSL_NO_DH
230         if (cert->dh_tmp != NULL)
231                 {
232                 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
233                 if (ret->dh_tmp == NULL)
234                         {
235                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
236                         goto err;
237                         }
238                 if (cert->dh_tmp->priv_key)
239                         {
240                         BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
241                         if (!b)
242                                 {
243                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
244                                 goto err;
245                                 }
246                         ret->dh_tmp->priv_key = b;
247                         }
248                 if (cert->dh_tmp->pub_key)
249                         {
250                         BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
251                         if (!b)
252                                 {
253                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
254                                 goto err;
255                                 }
256                         ret->dh_tmp->pub_key = b;
257                         }
258                 }
259         ret->dh_tmp_cb = cert->dh_tmp_cb;
260 #endif
261
262 #ifndef OPENSSL_NO_ECDH
263         if (cert->ecdh_tmp)
264                 {
265                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
266                 if (ret->ecdh_tmp == NULL)
267                         {
268                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
269                         goto err;
270                         }
271                 }
272         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
273         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
274 #endif
275
276         for (i = 0; i < SSL_PKEY_NUM; i++)
277                 {
278                 CERT_PKEY *cpk = cert->pkeys + i;
279                 CERT_PKEY *rpk = ret->pkeys + i;
280                 if (cpk->x509 != NULL)
281                         {
282                         rpk->x509 = cpk->x509;
283                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
284                         }
285                 
286                 if (cpk->privatekey != NULL)
287                         {
288                         rpk->privatekey = cpk->privatekey;
289                         CRYPTO_add(&cpk->privatekey->references, 1,
290                                 CRYPTO_LOCK_EVP_PKEY);
291
292                         switch(i) 
293                                 {
294                                 /* If there was anything special to do for
295                                  * certain types of keys, we'd do it here.
296                                  * (Nothing at the moment, I think.) */
297
298                         case SSL_PKEY_RSA_ENC:
299                         case SSL_PKEY_RSA_SIGN:
300                                 /* We have an RSA key. */
301                                 break;
302                                 
303                         case SSL_PKEY_DSA_SIGN:
304                                 /* We have a DSA key. */
305                                 break;
306                                 
307                         case SSL_PKEY_DH_RSA:
308                         case SSL_PKEY_DH_DSA:
309                                 /* We have a DH key. */
310                                 break;
311
312                         case SSL_PKEY_ECC:
313                                 /* We have an ECC key */
314                                 break;
315
316                         default:
317                                 /* Can't happen. */
318                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
319                                 }
320                         }
321
322                 if (cpk->chain)
323                         {
324                         rpk->chain = X509_chain_up_ref(cpk->chain);
325                         if (!rpk->chain)
326                                 {
327                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
328                                 goto err;
329                                 }
330                         }
331                 rpk->valid_flags = 0;
332                 if (cert->pkeys[i].authz != NULL)
333                         {
334                         /* Just copy everything. */
335                         ret->pkeys[i].authz_length =
336                                 cert->pkeys[i].authz_length;
337                         ret->pkeys[i].authz =
338                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
339                         if (ret->pkeys[i].authz == NULL)
340                                 {
341                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
342                                 return(NULL);
343                                 }
344                         memcpy(ret->pkeys[i].authz,
345                                cert->pkeys[i].authz,
346                                cert->pkeys[i].authz_length);
347                         }
348                 }
349         
350         ret->references=1;
351         /* Set digests to defaults. NB: we don't copy existing values as they
352          * will be set during handshake.
353          */
354         ssl_cert_set_default_md(ret);
355         /* Peer sigalgs set to NULL as we get these from handshake too */
356         ret->peer_sigalgs = NULL;
357         ret->peer_sigalgslen = 0;
358         /* Configured sigalgs however we copy across */
359
360         if (cert->conf_sigalgs)
361                 {
362                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
363                 if (!ret->conf_sigalgs)
364                         goto err;
365                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
366                                                 cert->conf_sigalgslen);
367                 ret->conf_sigalgslen = cert->conf_sigalgslen;
368                 }
369         else
370                 ret->conf_sigalgs = NULL;
371
372         if (cert->client_sigalgs)
373                 {
374                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
375                 if (!ret->client_sigalgs)
376                         goto err;
377                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
378                                                 cert->client_sigalgslen);
379                 ret->client_sigalgslen = cert->client_sigalgslen;
380                 }
381         else
382                 ret->client_sigalgs = NULL;
383         /* Shared sigalgs also NULL */
384         ret->shared_sigalgs = NULL;
385         /* Copy any custom client certificate types */
386         if (cert->ctypes)
387                 {
388                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
389                 if (!ret->ctypes)
390                         goto err;
391                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
392                 ret->ctype_num = cert->ctype_num;
393                 }
394
395         ret->cert_flags = cert->cert_flags;
396
397         ret->cert_cb = cert->cert_cb;
398         ret->cert_cb_arg = cert->cert_cb_arg;
399
400         if (cert->verify_store)
401                 {
402                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
403                 ret->verify_store = cert->verify_store;
404                 }
405
406         if (cert->chain_store)
407                 {
408                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
409                 ret->chain_store = cert->chain_store;
410                 }
411
412         ret->ciphers_raw = NULL;
413
414         return(ret);
415         
416 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
417 err:
418 #endif
419 #ifndef OPENSSL_NO_RSA
420         if (ret->rsa_tmp != NULL)
421                 RSA_free(ret->rsa_tmp);
422 #endif
423 #ifndef OPENSSL_NO_DH
424         if (ret->dh_tmp != NULL)
425                 DH_free(ret->dh_tmp);
426 #endif
427 #ifndef OPENSSL_NO_ECDH
428         if (ret->ecdh_tmp != NULL)
429                 EC_KEY_free(ret->ecdh_tmp);
430 #endif
431
432         ssl_cert_clear_certs(ret);
433
434         return NULL;
435         }
436
437 /* Free up and clear all certificates and chains */
438
439 void ssl_cert_clear_certs(CERT *c)
440         {
441         int i;
442         if (c == NULL)
443                 return;
444         for (i = 0; i<SSL_PKEY_NUM; i++)
445                 {
446                 CERT_PKEY *cpk = c->pkeys + i;
447                 if (cpk->x509)
448                         {
449                         X509_free(cpk->x509);
450                         cpk->x509 = NULL;
451                         }
452                 if (cpk->privatekey)
453                         {
454                         EVP_PKEY_free(cpk->privatekey);
455                         cpk->privatekey = NULL;
456                         }
457                 if (cpk->chain)
458                         {
459                         sk_X509_pop_free(cpk->chain, X509_free);
460                         cpk->chain = NULL;
461                         }
462 #ifndef OPENSSL_NO_TLSEXT
463                 if (cpk->authz != NULL)
464                         OPENSSL_free(cpk->authz);
465 #endif
466                 /* Clear all flags apart from explicit sign */
467                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
468                 }
469         }
470
471 void ssl_cert_free(CERT *c)
472         {
473         int i;
474
475         if(c == NULL)
476             return;
477
478         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
479 #ifdef REF_PRINT
480         REF_PRINT("CERT",c);
481 #endif
482         if (i > 0) return;
483 #ifdef REF_CHECK
484         if (i < 0)
485                 {
486                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
487                 abort(); /* ok */
488                 }
489 #endif
490
491 #ifndef OPENSSL_NO_RSA
492         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
493 #endif
494 #ifndef OPENSSL_NO_DH
495         if (c->dh_tmp) DH_free(c->dh_tmp);
496 #endif
497 #ifndef OPENSSL_NO_ECDH
498         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
499 #endif
500
501         ssl_cert_clear_certs(c);
502         if (c->peer_sigalgs)
503                 OPENSSL_free(c->peer_sigalgs);
504         if (c->conf_sigalgs)
505                 OPENSSL_free(c->conf_sigalgs);
506         if (c->client_sigalgs)
507                 OPENSSL_free(c->client_sigalgs);
508         if (c->shared_sigalgs)
509                 OPENSSL_free(c->shared_sigalgs);
510         if (c->ctypes)
511                 OPENSSL_free(c->ctypes);
512         if (c->verify_store)
513                 X509_STORE_free(c->verify_store);
514         if (c->chain_store)
515                 X509_STORE_free(c->chain_store);
516         if (c->ciphers_raw)
517                 OPENSSL_free(c->ciphers_raw);
518         OPENSSL_free(c);
519         }
520
521 int ssl_cert_inst(CERT **o)
522         {
523         /* Create a CERT if there isn't already one
524          * (which cannot really happen, as it is initially created in
525          * SSL_CTX_new; but the earlier code usually allows for that one
526          * being non-existant, so we follow that behaviour, as it might
527          * turn out that there actually is a reason for it -- but I'm
528          * not sure that *all* of the existing code could cope with
529          * s->cert being NULL, otherwise we could do without the
530          * initialization in SSL_CTX_new).
531          */
532         
533         if (o == NULL) 
534                 {
535                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
536                 return(0);
537                 }
538         if (*o == NULL)
539                 {
540                 if ((*o = ssl_cert_new()) == NULL)
541                         {
542                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
543                         return(0);
544                         }
545                 }
546         return(1);
547         }
548
549 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
550         {
551         CERT_PKEY *cpk = c->key;
552         if (!cpk)
553                 return 0;
554         if (cpk->chain)
555                 sk_X509_pop_free(cpk->chain, X509_free);
556         cpk->chain = chain;
557         return 1;
558         }
559
560 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
561         {
562         STACK_OF(X509) *dchain;
563         if (!chain)
564                 return ssl_cert_set0_chain(c, NULL);
565         dchain = X509_chain_up_ref(chain);
566         if (!dchain)
567                 return 0;
568         if (!ssl_cert_set0_chain(c, dchain))
569                 {
570                 sk_X509_pop_free(dchain, X509_free);
571                 return 0;
572                 }
573         return 1;
574         }
575
576 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
577         {
578         CERT_PKEY *cpk = c->key;
579         if (!cpk)
580                 return 0;
581         if (!cpk->chain)
582                 cpk->chain = sk_X509_new_null();
583         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
584                 return 0;
585         return 1;
586         }
587
588 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
589         {
590         if (!ssl_cert_add0_chain_cert(c, x))
591                 return 0;
592         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
593         return 1;
594         }
595
596 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
597         {
598         c->cert_cb = cb;
599         c->cert_cb_arg = arg;
600         }
601
602 SESS_CERT *ssl_sess_cert_new(void)
603         {
604         SESS_CERT *ret;
605
606         ret = OPENSSL_malloc(sizeof *ret);
607         if (ret == NULL)
608                 {
609                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
610                 return NULL;
611                 }
612
613         memset(ret, 0 ,sizeof *ret);
614         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
615         ret->references = 1;
616
617         return ret;
618         }
619
620 void ssl_sess_cert_free(SESS_CERT *sc)
621         {
622         int i;
623
624         if (sc == NULL)
625                 return;
626
627         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
628 #ifdef REF_PRINT
629         REF_PRINT("SESS_CERT", sc);
630 #endif
631         if (i > 0)
632                 return;
633 #ifdef REF_CHECK
634         if (i < 0)
635                 {
636                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
637                 abort(); /* ok */
638                 }
639 #endif
640
641         /* i == 0 */
642         if (sc->cert_chain != NULL)
643                 sk_X509_pop_free(sc->cert_chain, X509_free);
644         for (i = 0; i < SSL_PKEY_NUM; i++)
645                 {
646                 if (sc->peer_pkeys[i].x509 != NULL)
647                         X509_free(sc->peer_pkeys[i].x509);
648 #if 0 /* We don't have the peer's private key.  These lines are just
649            * here as a reminder that we're still using a not-quite-appropriate
650            * data structure. */
651                 if (sc->peer_pkeys[i].privatekey != NULL)
652                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
653 #endif
654                 }
655
656 #ifndef OPENSSL_NO_RSA
657         if (sc->peer_rsa_tmp != NULL)
658                 RSA_free(sc->peer_rsa_tmp);
659 #endif
660 #ifndef OPENSSL_NO_DH
661         if (sc->peer_dh_tmp != NULL)
662                 DH_free(sc->peer_dh_tmp);
663 #endif
664 #ifndef OPENSSL_NO_ECDH
665         if (sc->peer_ecdh_tmp != NULL)
666                 EC_KEY_free(sc->peer_ecdh_tmp);
667 #endif
668
669         OPENSSL_free(sc);
670         }
671
672 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
673         {
674         sc->peer_cert_type = type;
675         return(1);
676         }
677
678 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
679         {
680         X509 *x;
681         int i;
682         X509_STORE *verify_store;
683         X509_STORE_CTX ctx;
684
685         if (s->cert->verify_store)
686                 verify_store = s->cert->verify_store;
687         else
688                 verify_store = s->ctx->cert_store;
689
690         if ((sk == NULL) || (sk_X509_num(sk) == 0))
691                 return(0);
692
693         x=sk_X509_value(sk,0);
694         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
695                 {
696                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
697                 return(0);
698                 }
699         /* Set suite B flags if needed */
700         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
701 #if 0
702         if (SSL_get_verify_depth(s) >= 0)
703                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
704 #endif
705         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
706
707         /* We need to inherit the verify parameters. These can be determined by
708          * the context: if its a server it will verify SSL client certificates
709          * or vice versa.
710          */
711
712         X509_STORE_CTX_set_default(&ctx,
713                                 s->server ? "ssl_client" : "ssl_server");
714         /* Anything non-default in "param" should overwrite anything in the
715          * ctx.
716          */
717         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
718
719         if (s->verify_callback)
720                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
721
722         if (s->ctx->app_verify_callback != NULL)
723 #if 1 /* new with OpenSSL 0.9.7 */
724                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
725 #else
726                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
727 #endif
728         else
729                 {
730 #ifndef OPENSSL_NO_X509_VERIFY
731                 i=X509_verify_cert(&ctx);
732 #else
733                 i=0;
734                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
735                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
736 #endif
737                 }
738
739         s->verify_result=ctx.error;
740         X509_STORE_CTX_cleanup(&ctx);
741
742         return(i);
743         }
744
745 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
746         {
747         if (*ca_list != NULL)
748                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
749
750         *ca_list=name_list;
751         }
752
753 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
754         {
755         int i;
756         STACK_OF(X509_NAME) *ret;
757         X509_NAME *name;
758
759         ret=sk_X509_NAME_new_null();
760         for (i=0; i<sk_X509_NAME_num(sk); i++)
761                 {
762                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
763                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
764                         {
765                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
766                         return(NULL);
767                         }
768                 }
769         return(ret);
770         }
771
772 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
773         {
774         set_client_CA_list(&(s->client_CA),name_list);
775         }
776
777 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
778         {
779         set_client_CA_list(&(ctx->client_CA),name_list);
780         }
781
782 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
783         {
784         return(ctx->client_CA);
785         }
786
787 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
788         {
789         if (s->type == SSL_ST_CONNECT)
790                 { /* we are in the client */
791                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
792                         (s->s3 != NULL))
793                         return(s->s3->tmp.ca_names);
794                 else
795                         return(NULL);
796                 }
797         else
798                 {
799                 if (s->client_CA != NULL)
800                         return(s->client_CA);
801                 else
802                         return(s->ctx->client_CA);
803                 }
804         }
805
806 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
807         {
808         X509_NAME *name;
809
810         if (x == NULL) return(0);
811         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
812                 return(0);
813                 
814         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
815                 return(0);
816
817         if (!sk_X509_NAME_push(*sk,name))
818                 {
819                 X509_NAME_free(name);
820                 return(0);
821                 }
822         return(1);
823         }
824
825 int SSL_add_client_CA(SSL *ssl,X509 *x)
826         {
827         return(add_client_CA(&(ssl->client_CA),x));
828         }
829
830 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
831         {
832         return(add_client_CA(&(ctx->client_CA),x));
833         }
834
835 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
836         {
837         return(X509_NAME_cmp(*a,*b));
838         }
839
840 #ifndef OPENSSL_NO_STDIO
841 /*!
842  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
843  * it doesn't really have anything to do with clients (except that a common use
844  * for a stack of CAs is to send it to the client). Actually, it doesn't have
845  * much to do with CAs, either, since it will load any old cert.
846  * \param file the file containing one or more certs.
847  * \return a ::STACK containing the certs.
848  */
849 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
850         {
851         BIO *in;
852         X509 *x=NULL;
853         X509_NAME *xn=NULL;
854         STACK_OF(X509_NAME) *ret = NULL,*sk;
855
856         sk=sk_X509_NAME_new(xname_cmp);
857
858         in=BIO_new(BIO_s_file_internal());
859
860         if ((sk == NULL) || (in == NULL))
861                 {
862                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
863                 goto err;
864                 }
865         
866         if (!BIO_read_filename(in,file))
867                 goto err;
868
869         for (;;)
870                 {
871                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
872                         break;
873                 if (ret == NULL)
874                         {
875                         ret = sk_X509_NAME_new_null();
876                         if (ret == NULL)
877                                 {
878                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
879                                 goto err;
880                                 }
881                         }
882                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
883                 /* check for duplicates */
884                 xn=X509_NAME_dup(xn);
885                 if (xn == NULL) goto err;
886                 if (sk_X509_NAME_find(sk,xn) >= 0)
887                         X509_NAME_free(xn);
888                 else
889                         {
890                         sk_X509_NAME_push(sk,xn);
891                         sk_X509_NAME_push(ret,xn);
892                         }
893                 }
894
895         if (0)
896                 {
897 err:
898                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
899                 ret=NULL;
900                 }
901         if (sk != NULL) sk_X509_NAME_free(sk);
902         if (in != NULL) BIO_free(in);
903         if (x != NULL) X509_free(x);
904         if (ret != NULL)
905                 ERR_clear_error();
906         return(ret);
907         }
908 #endif
909
910 /*!
911  * Add a file of certs to a stack.
912  * \param stack the stack to add to.
913  * \param file the file to add from. All certs in this file that are not
914  * already in the stack will be added.
915  * \return 1 for success, 0 for failure. Note that in the case of failure some
916  * certs may have been added to \c stack.
917  */
918
919 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
920                                         const char *file)
921         {
922         BIO *in;
923         X509 *x=NULL;
924         X509_NAME *xn=NULL;
925         int ret=1;
926         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
927         
928         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
929         
930         in=BIO_new(BIO_s_file_internal());
931         
932         if (in == NULL)
933                 {
934                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
935                 goto err;
936                 }
937         
938         if (!BIO_read_filename(in,file))
939                 goto err;
940         
941         for (;;)
942                 {
943                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
944                         break;
945                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
946                 xn=X509_NAME_dup(xn);
947                 if (xn == NULL) goto err;
948                 if (sk_X509_NAME_find(stack,xn) >= 0)
949                         X509_NAME_free(xn);
950                 else
951                         sk_X509_NAME_push(stack,xn);
952                 }
953
954         ERR_clear_error();
955
956         if (0)
957                 {
958 err:
959                 ret=0;
960                 }
961         if(in != NULL)
962                 BIO_free(in);
963         if(x != NULL)
964                 X509_free(x);
965         
966         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
967
968         return ret;
969         }
970
971 /*!
972  * Add a directory of certs to a stack.
973  * \param stack the stack to append to.
974  * \param dir the directory to append from. All files in this directory will be
975  * examined as potential certs. Any that are acceptable to
976  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
977  * included.
978  * \return 1 for success, 0 for failure. Note that in the case of failure some
979  * certs may have been added to \c stack.
980  */
981
982 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
983                                        const char *dir)
984         {
985         OPENSSL_DIR_CTX *d = NULL;
986         const char *filename;
987         int ret = 0;
988
989         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
990
991         /* Note that a side effect is that the CAs will be sorted by name */
992
993         while((filename = OPENSSL_DIR_read(&d, dir)))
994                 {
995                 char buf[1024];
996                 int r;
997
998                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
999                         {
1000                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1001                         goto err;
1002                         }
1003
1004 #ifdef OPENSSL_SYS_VMS
1005                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1006 #else
1007                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1008 #endif
1009                 if (r <= 0 || r >= (int)sizeof(buf))
1010                         goto err;
1011                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1012                         goto err;
1013                 }
1014
1015         if (errno)
1016                 {
1017                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1018                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1019                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1020                 goto err;
1021                 }
1022
1023         ret = 1;
1024
1025 err:
1026         if (d) OPENSSL_DIR_end(&d);
1027         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1028         return ret;
1029         }
1030
1031 /* Add a certificate to a BUF_MEM structure */
1032
1033 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1034         {
1035         int n;
1036         unsigned char *p;
1037
1038         n=i2d_X509(x,NULL);
1039         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1040                 {
1041                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1042                 return 0;
1043                 }
1044         p=(unsigned char *)&(buf->data[*l]);
1045         l2n3(n,p);
1046         i2d_X509(x,&p);
1047         *l+=n+3;
1048
1049         return 1;
1050         }
1051
1052 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1053 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1054         {
1055         BUF_MEM *buf = s->init_buf;
1056         int no_chain;
1057         int i;
1058
1059         X509 *x;
1060         STACK_OF(X509) *extra_certs;
1061         X509_STORE *chain_store;
1062
1063         if (cpk)
1064                 x = cpk->x509;
1065         else
1066                 x = NULL;
1067
1068         if (s->cert->chain_store)
1069                 chain_store = s->cert->chain_store;
1070         else
1071                 chain_store = s->ctx->cert_store;
1072
1073         /* If we have a certificate specific chain use it, else use
1074          * parent ctx.
1075          */
1076         if (cpk && cpk->chain)
1077                 extra_certs = cpk->chain;
1078         else
1079                 extra_certs = s->ctx->extra_certs;
1080
1081         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1082                 no_chain = 1;
1083         else
1084                 no_chain = 0;
1085
1086         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1087         if (!BUF_MEM_grow_clean(buf,10))
1088                 {
1089                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1090                 return 0;
1091                 }
1092         if (x != NULL)
1093                 {
1094                 if (no_chain)
1095                         {
1096                         if (!ssl_add_cert_to_buf(buf, l, x))
1097                                 return 0;
1098                         }
1099                 else
1100                         {
1101                         X509_STORE_CTX xs_ctx;
1102
1103                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1104                                 {
1105                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1106                                 return(0);
1107                                 }
1108                         X509_verify_cert(&xs_ctx);
1109                         /* Don't leave errors in the queue */
1110                         ERR_clear_error();
1111                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1112                                 {
1113                                 x = sk_X509_value(xs_ctx.chain, i);
1114
1115                                 if (!ssl_add_cert_to_buf(buf, l, x))
1116                                         {
1117                                         X509_STORE_CTX_cleanup(&xs_ctx);
1118                                         return 0;
1119                                         }
1120                                 }
1121                         X509_STORE_CTX_cleanup(&xs_ctx);
1122                         }
1123                 }
1124         for (i=0; i<sk_X509_num(extra_certs); i++)
1125                 {
1126                 x=sk_X509_value(extra_certs,i);
1127                 if (!ssl_add_cert_to_buf(buf, l, x))
1128                         return 0;
1129                 }
1130
1131         return 1;
1132         }
1133
1134 /* Build a certificate chain for current certificate */
1135 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1136         {
1137         CERT_PKEY *cpk = c->key;
1138         X509_STORE_CTX xs_ctx;
1139         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1140         X509 *x;
1141         int i;
1142
1143         if (!cpk->x509)
1144                 {
1145                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1146                 return 0;
1147                 }
1148
1149         if (c->chain_store)
1150                 chain_store = c->chain_store;
1151
1152         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1153                 untrusted = cpk->chain;
1154
1155         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1156                 {
1157                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1158                 return 0;
1159                 }
1160         /* Set suite B flags if needed */
1161         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1162
1163         i = X509_verify_cert(&xs_ctx);
1164         if (i > 0)
1165                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1166         X509_STORE_CTX_cleanup(&xs_ctx);
1167         if (i <= 0)
1168                 {
1169                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1170                 return 0;
1171                 }
1172         if (cpk->chain)
1173                 sk_X509_pop_free(cpk->chain, X509_free);
1174         /* Remove EE certificate from chain */
1175         x = sk_X509_shift(chain);
1176         X509_free(x);
1177         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1178                 {
1179                 x = sk_X509_pop(chain);
1180                 X509_free(x);
1181                 }
1182         cpk->chain = chain;
1183
1184         return 1;
1185         }
1186
1187 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1188         {
1189         X509_STORE **pstore;
1190         if (chain)
1191                 pstore = &c->chain_store;
1192         else
1193                 pstore = &c->verify_store;
1194         if (*pstore)
1195                 X509_STORE_free(*pstore);
1196         *pstore = store;
1197         if (ref && store)
1198                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1199         return 1;
1200         }
1201