1edbf18f3b7ece36e59a2d3f067b7c26b0ff8b27
[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                         int j;
325                         rpk->chain = sk_X509_dup(cpk->chain);
326                         if (!rpk->chain)
327                                 {
328                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
329                                 goto err;
330                                 }
331                         for (j = 0; j < sk_X509_num(rpk->chain); j++)
332                                 {
333                                 X509 *x = sk_X509_value(rpk->chain, j);
334                                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
335                                 }
336                         }
337                 rpk->valid_flags = 0;
338                 if (cert->pkeys[i].authz != NULL)
339                         {
340                         /* Just copy everything. */
341                         ret->pkeys[i].authz_length =
342                                 cert->pkeys[i].authz_length;
343                         ret->pkeys[i].authz =
344                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
345                         if (ret->pkeys[i].authz == NULL)
346                                 {
347                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
348                                 return(NULL);
349                                 }
350                         memcpy(ret->pkeys[i].authz,
351                                cert->pkeys[i].authz,
352                                cert->pkeys[i].authz_length);
353                         }
354                 }
355         
356         ret->references=1;
357         /* Set digests to defaults. NB: we don't copy existing values as they
358          * will be set during handshake.
359          */
360         ssl_cert_set_default_md(ret);
361         /* Peer sigalgs set to NULL as we get these from handshake too */
362         ret->peer_sigalgs = NULL;
363         ret->peer_sigalgslen = 0;
364         /* Configured sigalgs however we copy across */
365
366         if (cert->conf_sigalgs)
367                 {
368                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
369                 if (!ret->conf_sigalgs)
370                         goto err;
371                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
372                                                 cert->conf_sigalgslen);
373                 ret->conf_sigalgslen = cert->conf_sigalgslen;
374                 }
375         else
376                 ret->conf_sigalgs = NULL;
377
378         if (cert->client_sigalgs)
379                 {
380                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
381                 if (!ret->client_sigalgs)
382                         goto err;
383                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
384                                                 cert->client_sigalgslen);
385                 ret->client_sigalgslen = cert->client_sigalgslen;
386                 }
387         else
388                 ret->client_sigalgs = NULL;
389         /* Shared sigalgs also NULL */
390         ret->shared_sigalgs = NULL;
391
392         ret->cert_flags = cert->cert_flags;
393
394         ret->cert_cb = cert->cert_cb;
395         ret->cert_cb_arg = cert->cert_cb_arg;
396
397         return(ret);
398         
399 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
400 err:
401 #endif
402 #ifndef OPENSSL_NO_RSA
403         if (ret->rsa_tmp != NULL)
404                 RSA_free(ret->rsa_tmp);
405 #endif
406 #ifndef OPENSSL_NO_DH
407         if (ret->dh_tmp != NULL)
408                 DH_free(ret->dh_tmp);
409 #endif
410 #ifndef OPENSSL_NO_ECDH
411         if (ret->ecdh_tmp != NULL)
412                 EC_KEY_free(ret->ecdh_tmp);
413 #endif
414
415         ssl_cert_clear_certs(ret);
416
417         return NULL;
418         }
419
420 /* Free up and clear all certificates and chains */
421
422 void ssl_cert_clear_certs(CERT *c)
423         {
424         int i;
425         if (c == NULL)
426                 return;
427         for (i = 0; i<SSL_PKEY_NUM; i++)
428                 {
429                 CERT_PKEY *cpk = c->pkeys + i;
430                 if (cpk->x509)
431                         {
432                         X509_free(cpk->x509);
433                         cpk->x509 = NULL;
434                         }
435                 if (cpk->privatekey)
436                         {
437                         EVP_PKEY_free(cpk->privatekey);
438                         cpk->privatekey = NULL;
439                         }
440                 if (cpk->chain)
441                         {
442                         sk_X509_pop_free(cpk->chain, X509_free);
443                         cpk->chain = NULL;
444                         }
445 #ifndef OPENSSL_NO_TLSEXT
446                 if (cpk->authz != NULL)
447                         OPENSSL_free(cpk->authz);
448 #endif
449                 cpk->valid_flags = 0;
450                 }
451         }
452
453 void ssl_cert_free(CERT *c)
454         {
455         int i;
456
457         if(c == NULL)
458             return;
459
460         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
461 #ifdef REF_PRINT
462         REF_PRINT("CERT",c);
463 #endif
464         if (i > 0) return;
465 #ifdef REF_CHECK
466         if (i < 0)
467                 {
468                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
469                 abort(); /* ok */
470                 }
471 #endif
472
473 #ifndef OPENSSL_NO_RSA
474         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
475 #endif
476 #ifndef OPENSSL_NO_DH
477         if (c->dh_tmp) DH_free(c->dh_tmp);
478 #endif
479 #ifndef OPENSSL_NO_ECDH
480         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
481 #endif
482
483         ssl_cert_clear_certs(c);
484         if (c->peer_sigalgs)
485                 OPENSSL_free(c->peer_sigalgs);
486         if (c->conf_sigalgs)
487                 OPENSSL_free(c->conf_sigalgs);
488         if (c->client_sigalgs)
489                 OPENSSL_free(c->client_sigalgs);
490         if (c->shared_sigalgs)
491                 OPENSSL_free(c->shared_sigalgs);
492         OPENSSL_free(c);
493         }
494
495 int ssl_cert_inst(CERT **o)
496         {
497         /* Create a CERT if there isn't already one
498          * (which cannot really happen, as it is initially created in
499          * SSL_CTX_new; but the earlier code usually allows for that one
500          * being non-existant, so we follow that behaviour, as it might
501          * turn out that there actually is a reason for it -- but I'm
502          * not sure that *all* of the existing code could cope with
503          * s->cert being NULL, otherwise we could do without the
504          * initialization in SSL_CTX_new).
505          */
506         
507         if (o == NULL) 
508                 {
509                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
510                 return(0);
511                 }
512         if (*o == NULL)
513                 {
514                 if ((*o = ssl_cert_new()) == NULL)
515                         {
516                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
517                         return(0);
518                         }
519                 }
520         return(1);
521         }
522
523 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
524         {
525         CERT_PKEY *cpk = c->key;
526         if (!cpk)
527                 return 0;
528         if (cpk->chain)
529                 sk_X509_pop_free(cpk->chain, X509_free);
530         cpk->chain = chain;
531         return 1;
532         }
533
534 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
535         {
536         STACK_OF(X509) *dchain;
537         X509 *x;
538         int i;
539         if (!chain)
540                 return ssl_cert_set0_chain(c, NULL);
541         dchain = sk_X509_dup(chain);
542         if (!dchain)
543                 return 0;
544         for (i = 0; i < sk_X509_num(dchain); i++)
545                 {
546                 x = sk_X509_value(dchain, i);
547                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
548                 }
549         if (!ssl_cert_set0_chain(c, dchain))
550                 {
551                 sk_X509_pop_free(dchain, X509_free);
552                 return 0;
553                 }
554         return 1;
555         }
556
557 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
558         {
559         CERT_PKEY *cpk = c->key;
560         if (!cpk)
561                 return 0;
562         if (!cpk->chain)
563                 cpk->chain = sk_X509_new_null();
564         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
565                 return 0;
566         return 1;
567         }
568
569 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
570         {
571         if (!ssl_cert_add0_chain_cert(c, x))
572                 return 0;
573         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
574         return 1;
575         }
576
577 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
578         {
579         c->cert_cb = cb;
580         c->cert_cb_arg = arg;
581         }
582
583 SESS_CERT *ssl_sess_cert_new(void)
584         {
585         SESS_CERT *ret;
586
587         ret = OPENSSL_malloc(sizeof *ret);
588         if (ret == NULL)
589                 {
590                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
591                 return NULL;
592                 }
593
594         memset(ret, 0 ,sizeof *ret);
595         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
596         ret->references = 1;
597
598         return ret;
599         }
600
601 void ssl_sess_cert_free(SESS_CERT *sc)
602         {
603         int i;
604
605         if (sc == NULL)
606                 return;
607
608         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
609 #ifdef REF_PRINT
610         REF_PRINT("SESS_CERT", sc);
611 #endif
612         if (i > 0)
613                 return;
614 #ifdef REF_CHECK
615         if (i < 0)
616                 {
617                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
618                 abort(); /* ok */
619                 }
620 #endif
621
622         /* i == 0 */
623         if (sc->cert_chain != NULL)
624                 sk_X509_pop_free(sc->cert_chain, X509_free);
625         for (i = 0; i < SSL_PKEY_NUM; i++)
626                 {
627                 if (sc->peer_pkeys[i].x509 != NULL)
628                         X509_free(sc->peer_pkeys[i].x509);
629 #if 0 /* We don't have the peer's private key.  These lines are just
630            * here as a reminder that we're still using a not-quite-appropriate
631            * data structure. */
632                 if (sc->peer_pkeys[i].privatekey != NULL)
633                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
634 #endif
635                 }
636
637 #ifndef OPENSSL_NO_RSA
638         if (sc->peer_rsa_tmp != NULL)
639                 RSA_free(sc->peer_rsa_tmp);
640 #endif
641 #ifndef OPENSSL_NO_DH
642         if (sc->peer_dh_tmp != NULL)
643                 DH_free(sc->peer_dh_tmp);
644 #endif
645 #ifndef OPENSSL_NO_ECDH
646         if (sc->peer_ecdh_tmp != NULL)
647                 EC_KEY_free(sc->peer_ecdh_tmp);
648 #endif
649
650         OPENSSL_free(sc);
651         }
652
653 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
654         {
655         sc->peer_cert_type = type;
656         return(1);
657         }
658
659 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
660         {
661         X509 *x;
662         int i;
663         X509_STORE_CTX ctx;
664
665         if ((sk == NULL) || (sk_X509_num(sk) == 0))
666                 return(0);
667
668         x=sk_X509_value(sk,0);
669         if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
670                 {
671                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
672                 return(0);
673                 }
674 #if 0
675         if (SSL_get_verify_depth(s) >= 0)
676                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
677 #endif
678         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
679
680         /* We need to inherit the verify parameters. These can be determined by
681          * the context: if its a server it will verify SSL client certificates
682          * or vice versa.
683          */
684
685         X509_STORE_CTX_set_default(&ctx,
686                                 s->server ? "ssl_client" : "ssl_server");
687         /* Anything non-default in "param" should overwrite anything in the
688          * ctx.
689          */
690         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
691
692         if (s->verify_callback)
693                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
694
695         if (s->ctx->app_verify_callback != NULL)
696 #if 1 /* new with OpenSSL 0.9.7 */
697                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
698 #else
699                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
700 #endif
701         else
702                 {
703 #ifndef OPENSSL_NO_X509_VERIFY
704                 i=X509_verify_cert(&ctx);
705 #else
706                 i=0;
707                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
708                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
709 #endif
710                 }
711
712         s->verify_result=ctx.error;
713         X509_STORE_CTX_cleanup(&ctx);
714
715         return(i);
716         }
717
718 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
719         {
720         if (*ca_list != NULL)
721                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
722
723         *ca_list=name_list;
724         }
725
726 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
727         {
728         int i;
729         STACK_OF(X509_NAME) *ret;
730         X509_NAME *name;
731
732         ret=sk_X509_NAME_new_null();
733         for (i=0; i<sk_X509_NAME_num(sk); i++)
734                 {
735                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
736                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
737                         {
738                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
739                         return(NULL);
740                         }
741                 }
742         return(ret);
743         }
744
745 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
746         {
747         set_client_CA_list(&(s->client_CA),name_list);
748         }
749
750 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
751         {
752         set_client_CA_list(&(ctx->client_CA),name_list);
753         }
754
755 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
756         {
757         return(ctx->client_CA);
758         }
759
760 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
761         {
762         if (s->type == SSL_ST_CONNECT)
763                 { /* we are in the client */
764                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
765                         (s->s3 != NULL))
766                         return(s->s3->tmp.ca_names);
767                 else
768                         return(NULL);
769                 }
770         else
771                 {
772                 if (s->client_CA != NULL)
773                         return(s->client_CA);
774                 else
775                         return(s->ctx->client_CA);
776                 }
777         }
778
779 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
780         {
781         X509_NAME *name;
782
783         if (x == NULL) return(0);
784         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
785                 return(0);
786                 
787         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
788                 return(0);
789
790         if (!sk_X509_NAME_push(*sk,name))
791                 {
792                 X509_NAME_free(name);
793                 return(0);
794                 }
795         return(1);
796         }
797
798 int SSL_add_client_CA(SSL *ssl,X509 *x)
799         {
800         return(add_client_CA(&(ssl->client_CA),x));
801         }
802
803 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
804         {
805         return(add_client_CA(&(ctx->client_CA),x));
806         }
807
808 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
809         {
810         return(X509_NAME_cmp(*a,*b));
811         }
812
813 #ifndef OPENSSL_NO_STDIO
814 /*!
815  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
816  * it doesn't really have anything to do with clients (except that a common use
817  * for a stack of CAs is to send it to the client). Actually, it doesn't have
818  * much to do with CAs, either, since it will load any old cert.
819  * \param file the file containing one or more certs.
820  * \return a ::STACK containing the certs.
821  */
822 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
823         {
824         BIO *in;
825         X509 *x=NULL;
826         X509_NAME *xn=NULL;
827         STACK_OF(X509_NAME) *ret = NULL,*sk;
828
829         sk=sk_X509_NAME_new(xname_cmp);
830
831         in=BIO_new(BIO_s_file_internal());
832
833         if ((sk == NULL) || (in == NULL))
834                 {
835                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
836                 goto err;
837                 }
838         
839         if (!BIO_read_filename(in,file))
840                 goto err;
841
842         for (;;)
843                 {
844                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
845                         break;
846                 if (ret == NULL)
847                         {
848                         ret = sk_X509_NAME_new_null();
849                         if (ret == NULL)
850                                 {
851                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
852                                 goto err;
853                                 }
854                         }
855                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
856                 /* check for duplicates */
857                 xn=X509_NAME_dup(xn);
858                 if (xn == NULL) goto err;
859                 if (sk_X509_NAME_find(sk,xn) >= 0)
860                         X509_NAME_free(xn);
861                 else
862                         {
863                         sk_X509_NAME_push(sk,xn);
864                         sk_X509_NAME_push(ret,xn);
865                         }
866                 }
867
868         if (0)
869                 {
870 err:
871                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
872                 ret=NULL;
873                 }
874         if (sk != NULL) sk_X509_NAME_free(sk);
875         if (in != NULL) BIO_free(in);
876         if (x != NULL) X509_free(x);
877         if (ret != NULL)
878                 ERR_clear_error();
879         return(ret);
880         }
881 #endif
882
883 /*!
884  * Add a file of certs to a stack.
885  * \param stack the stack to add to.
886  * \param file the file to add from. All certs in this file that are not
887  * already in the stack will be added.
888  * \return 1 for success, 0 for failure. Note that in the case of failure some
889  * certs may have been added to \c stack.
890  */
891
892 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
893                                         const char *file)
894         {
895         BIO *in;
896         X509 *x=NULL;
897         X509_NAME *xn=NULL;
898         int ret=1;
899         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
900         
901         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
902         
903         in=BIO_new(BIO_s_file_internal());
904         
905         if (in == NULL)
906                 {
907                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
908                 goto err;
909                 }
910         
911         if (!BIO_read_filename(in,file))
912                 goto err;
913         
914         for (;;)
915                 {
916                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
917                         break;
918                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
919                 xn=X509_NAME_dup(xn);
920                 if (xn == NULL) goto err;
921                 if (sk_X509_NAME_find(stack,xn) >= 0)
922                         X509_NAME_free(xn);
923                 else
924                         sk_X509_NAME_push(stack,xn);
925                 }
926
927         ERR_clear_error();
928
929         if (0)
930                 {
931 err:
932                 ret=0;
933                 }
934         if(in != NULL)
935                 BIO_free(in);
936         if(x != NULL)
937                 X509_free(x);
938         
939         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
940
941         return ret;
942         }
943
944 /*!
945  * Add a directory of certs to a stack.
946  * \param stack the stack to append to.
947  * \param dir the directory to append from. All files in this directory will be
948  * examined as potential certs. Any that are acceptable to
949  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
950  * included.
951  * \return 1 for success, 0 for failure. Note that in the case of failure some
952  * certs may have been added to \c stack.
953  */
954
955 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
956                                        const char *dir)
957         {
958         OPENSSL_DIR_CTX *d = NULL;
959         const char *filename;
960         int ret = 0;
961
962         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
963
964         /* Note that a side effect is that the CAs will be sorted by name */
965
966         while((filename = OPENSSL_DIR_read(&d, dir)))
967                 {
968                 char buf[1024];
969                 int r;
970
971                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
972                         {
973                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
974                         goto err;
975                         }
976
977 #ifdef OPENSSL_SYS_VMS
978                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
979 #else
980                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
981 #endif
982                 if (r <= 0 || r >= (int)sizeof(buf))
983                         goto err;
984                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
985                         goto err;
986                 }
987
988         if (errno)
989                 {
990                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
991                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
992                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
993                 goto err;
994                 }
995
996         ret = 1;
997
998 err:
999         if (d) OPENSSL_DIR_end(&d);
1000         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1001         return ret;
1002         }
1003
1004 /* Add a certificate to a BUF_MEM structure */
1005
1006 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1007         {
1008         int n;
1009         unsigned char *p;
1010
1011         n=i2d_X509(x,NULL);
1012         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1013                 {
1014                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1015                 return 0;
1016                 }
1017         p=(unsigned char *)&(buf->data[*l]);
1018         l2n3(n,p);
1019         i2d_X509(x,&p);
1020         *l+=n+3;
1021
1022         return 1;
1023         }
1024
1025 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1026 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1027         {
1028         BUF_MEM *buf = s->init_buf;
1029         int no_chain;
1030         int i;
1031
1032         X509 *x;
1033         STACK_OF(X509) *extra_certs;
1034
1035         if (cpk)
1036                 x = cpk->x509;
1037         else
1038                 x = NULL;
1039
1040         /* If we have a certificate specific chain use it, else use
1041          * parent ctx.
1042          */
1043         if (cpk && cpk->chain)
1044                 extra_certs = cpk->chain;
1045         else
1046                 extra_certs = s->ctx->extra_certs;
1047
1048         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1049                 no_chain = 1;
1050         else
1051                 no_chain = 0;
1052
1053         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1054         if (!BUF_MEM_grow_clean(buf,10))
1055                 {
1056                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1057                 return 0;
1058                 }
1059         if (x != NULL)
1060                 {
1061                 if (no_chain)
1062                         {
1063                         if (!ssl_add_cert_to_buf(buf, l, x))
1064                                 return 0;
1065                         }
1066                 else
1067                         {
1068                         X509_STORE_CTX xs_ctx;
1069
1070                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
1071                                 {
1072                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1073                                 return(0);
1074                                 }
1075                         X509_verify_cert(&xs_ctx);
1076                         /* Don't leave errors in the queue */
1077                         ERR_clear_error();
1078                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1079                                 {
1080                                 x = sk_X509_value(xs_ctx.chain, i);
1081
1082                                 if (!ssl_add_cert_to_buf(buf, l, x))
1083                                         {
1084                                         X509_STORE_CTX_cleanup(&xs_ctx);
1085                                         return 0;
1086                                         }
1087                                 }
1088                         X509_STORE_CTX_cleanup(&xs_ctx);
1089                         }
1090                 }
1091         for (i=0; i<sk_X509_num(extra_certs); i++)
1092                 {
1093                 x=sk_X509_value(extra_certs,i);
1094                 if (!ssl_add_cert_to_buf(buf, l, x))
1095                         return 0;
1096                 }
1097
1098         return 1;
1099         }
1100