9aa7b04966e026a7f3cb0feaf7dd3fe92cb43ea9
[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         /* Configure sigalgs however we copy across */
365         if (cert->conf_sigalgs)
366                 {
367                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
368                                                         * sizeof(TLS_SIGALGS));
369                 if (!ret->conf_sigalgs)
370                         goto err;
371                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
372                                 cert->conf_sigalgslen * sizeof(TLS_SIGALGS));
373                 ret->conf_sigalgslen = cert->conf_sigalgslen;
374                 }
375         else
376                 ret->conf_sigalgs = NULL;
377         /* Shared sigalgs also NULL */
378         ret->shared_sigalgs = NULL;
379
380         ret->cert_flags = cert->cert_flags;
381
382         ret->cert_cb = cert->cert_cb;
383         ret->cert_cb_arg = cert->cert_cb_arg;
384
385         return(ret);
386         
387 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
388 err:
389 #endif
390 #ifndef OPENSSL_NO_RSA
391         if (ret->rsa_tmp != NULL)
392                 RSA_free(ret->rsa_tmp);
393 #endif
394 #ifndef OPENSSL_NO_DH
395         if (ret->dh_tmp != NULL)
396                 DH_free(ret->dh_tmp);
397 #endif
398 #ifndef OPENSSL_NO_ECDH
399         if (ret->ecdh_tmp != NULL)
400                 EC_KEY_free(ret->ecdh_tmp);
401 #endif
402
403         ssl_cert_clear_certs(ret);
404
405         return NULL;
406         }
407
408 /* Free up and clear all certificates and chains */
409
410 void ssl_cert_clear_certs(CERT *c)
411         {
412         int i;
413         if (c == NULL)
414                 return;
415         for (i = 0; i<SSL_PKEY_NUM; i++)
416                 {
417                 CERT_PKEY *cpk = c->pkeys + i;
418                 if (cpk->x509)
419                         {
420                         X509_free(cpk->x509);
421                         cpk->x509 = NULL;
422                         }
423                 if (cpk->privatekey)
424                         {
425                         EVP_PKEY_free(cpk->privatekey);
426                         cpk->privatekey = NULL;
427                         }
428                 if (cpk->chain)
429                         {
430                         sk_X509_pop_free(cpk->chain, X509_free);
431                         cpk->chain = NULL;
432                         }
433 #ifndef OPENSSL_NO_TLSEXT
434                 if (cpk->authz != NULL)
435                         OPENSSL_free(cpk->authz);
436 #endif
437                 cpk->valid_flags = 0;
438                 }
439         }
440
441 void ssl_cert_free(CERT *c)
442         {
443         int i;
444
445         if(c == NULL)
446             return;
447
448         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
449 #ifdef REF_PRINT
450         REF_PRINT("CERT",c);
451 #endif
452         if (i > 0) return;
453 #ifdef REF_CHECK
454         if (i < 0)
455                 {
456                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
457                 abort(); /* ok */
458                 }
459 #endif
460
461 #ifndef OPENSSL_NO_RSA
462         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
463 #endif
464 #ifndef OPENSSL_NO_DH
465         if (c->dh_tmp) DH_free(c->dh_tmp);
466 #endif
467 #ifndef OPENSSL_NO_ECDH
468         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
469 #endif
470
471         ssl_cert_clear_certs(c);
472         if (c->peer_sigalgs)
473                 OPENSSL_free(c->peer_sigalgs);
474         if (c->conf_sigalgs)
475                 OPENSSL_free(c->conf_sigalgs);
476         if (c->shared_sigalgs)
477                 OPENSSL_free(c->shared_sigalgs);
478         OPENSSL_free(c);
479         }
480
481 int ssl_cert_inst(CERT **o)
482         {
483         /* Create a CERT if there isn't already one
484          * (which cannot really happen, as it is initially created in
485          * SSL_CTX_new; but the earlier code usually allows for that one
486          * being non-existant, so we follow that behaviour, as it might
487          * turn out that there actually is a reason for it -- but I'm
488          * not sure that *all* of the existing code could cope with
489          * s->cert being NULL, otherwise we could do without the
490          * initialization in SSL_CTX_new).
491          */
492         
493         if (o == NULL) 
494                 {
495                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
496                 return(0);
497                 }
498         if (*o == NULL)
499                 {
500                 if ((*o = ssl_cert_new()) == NULL)
501                         {
502                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
503                         return(0);
504                         }
505                 }
506         return(1);
507         }
508
509 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
510         {
511         CERT_PKEY *cpk = c->key;
512         if (!cpk)
513                 return 0;
514         if (cpk->chain)
515                 sk_X509_pop_free(cpk->chain, X509_free);
516         cpk->chain = chain;
517         return 1;
518         }
519
520 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
521         {
522         STACK_OF(X509) *dchain;
523         X509 *x;
524         int i;
525         if (!chain)
526                 return ssl_cert_set0_chain(c, NULL);
527         dchain = sk_X509_dup(chain);
528         if (!dchain)
529                 return 0;
530         for (i = 0; i < sk_X509_num(dchain); i++)
531                 {
532                 x = sk_X509_value(dchain, i);
533                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
534                 }
535         if (!ssl_cert_set0_chain(c, dchain))
536                 {
537                 sk_X509_pop_free(dchain, X509_free);
538                 return 0;
539                 }
540         return 1;
541         }
542
543 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
544         {
545         CERT_PKEY *cpk = c->key;
546         if (!cpk)
547                 return 0;
548         if (!cpk->chain)
549                 cpk->chain = sk_X509_new_null();
550         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
551                 return 0;
552         return 1;
553         }
554
555 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
556         {
557         if (!ssl_cert_add0_chain_cert(c, x))
558                 return 0;
559         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
560         return 1;
561         }
562
563 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
564         {
565         c->cert_cb = cb;
566         c->cert_cb_arg = arg;
567         }
568
569 SESS_CERT *ssl_sess_cert_new(void)
570         {
571         SESS_CERT *ret;
572
573         ret = OPENSSL_malloc(sizeof *ret);
574         if (ret == NULL)
575                 {
576                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
577                 return NULL;
578                 }
579
580         memset(ret, 0 ,sizeof *ret);
581         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
582         ret->references = 1;
583
584         return ret;
585         }
586
587 void ssl_sess_cert_free(SESS_CERT *sc)
588         {
589         int i;
590
591         if (sc == NULL)
592                 return;
593
594         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
595 #ifdef REF_PRINT
596         REF_PRINT("SESS_CERT", sc);
597 #endif
598         if (i > 0)
599                 return;
600 #ifdef REF_CHECK
601         if (i < 0)
602                 {
603                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
604                 abort(); /* ok */
605                 }
606 #endif
607
608         /* i == 0 */
609         if (sc->cert_chain != NULL)
610                 sk_X509_pop_free(sc->cert_chain, X509_free);
611         for (i = 0; i < SSL_PKEY_NUM; i++)
612                 {
613                 if (sc->peer_pkeys[i].x509 != NULL)
614                         X509_free(sc->peer_pkeys[i].x509);
615 #if 0 /* We don't have the peer's private key.  These lines are just
616            * here as a reminder that we're still using a not-quite-appropriate
617            * data structure. */
618                 if (sc->peer_pkeys[i].privatekey != NULL)
619                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
620 #endif
621                 }
622
623 #ifndef OPENSSL_NO_RSA
624         if (sc->peer_rsa_tmp != NULL)
625                 RSA_free(sc->peer_rsa_tmp);
626 #endif
627 #ifndef OPENSSL_NO_DH
628         if (sc->peer_dh_tmp != NULL)
629                 DH_free(sc->peer_dh_tmp);
630 #endif
631 #ifndef OPENSSL_NO_ECDH
632         if (sc->peer_ecdh_tmp != NULL)
633                 EC_KEY_free(sc->peer_ecdh_tmp);
634 #endif
635
636         OPENSSL_free(sc);
637         }
638
639 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
640         {
641         sc->peer_cert_type = type;
642         return(1);
643         }
644
645 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
646         {
647         X509 *x;
648         int i;
649         X509_STORE_CTX ctx;
650
651         if ((sk == NULL) || (sk_X509_num(sk) == 0))
652                 return(0);
653
654         x=sk_X509_value(sk,0);
655         if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
656                 {
657                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
658                 return(0);
659                 }
660 #if 0
661         if (SSL_get_verify_depth(s) >= 0)
662                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
663 #endif
664         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
665
666         /* We need to inherit the verify parameters. These can be determined by
667          * the context: if its a server it will verify SSL client certificates
668          * or vice versa.
669          */
670
671         X509_STORE_CTX_set_default(&ctx,
672                                 s->server ? "ssl_client" : "ssl_server");
673         /* Anything non-default in "param" should overwrite anything in the
674          * ctx.
675          */
676         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
677
678         if (s->verify_callback)
679                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
680
681         if (s->ctx->app_verify_callback != NULL)
682 #if 1 /* new with OpenSSL 0.9.7 */
683                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
684 #else
685                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
686 #endif
687         else
688                 {
689 #ifndef OPENSSL_NO_X509_VERIFY
690                 i=X509_verify_cert(&ctx);
691 #else
692                 i=0;
693                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
694                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
695 #endif
696                 }
697
698         s->verify_result=ctx.error;
699         X509_STORE_CTX_cleanup(&ctx);
700
701         return(i);
702         }
703
704 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
705         {
706         if (*ca_list != NULL)
707                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
708
709         *ca_list=name_list;
710         }
711
712 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
713         {
714         int i;
715         STACK_OF(X509_NAME) *ret;
716         X509_NAME *name;
717
718         ret=sk_X509_NAME_new_null();
719         for (i=0; i<sk_X509_NAME_num(sk); i++)
720                 {
721                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
722                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
723                         {
724                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
725                         return(NULL);
726                         }
727                 }
728         return(ret);
729         }
730
731 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
732         {
733         set_client_CA_list(&(s->client_CA),name_list);
734         }
735
736 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
737         {
738         set_client_CA_list(&(ctx->client_CA),name_list);
739         }
740
741 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
742         {
743         return(ctx->client_CA);
744         }
745
746 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
747         {
748         if (s->type == SSL_ST_CONNECT)
749                 { /* we are in the client */
750                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
751                         (s->s3 != NULL))
752                         return(s->s3->tmp.ca_names);
753                 else
754                         return(NULL);
755                 }
756         else
757                 {
758                 if (s->client_CA != NULL)
759                         return(s->client_CA);
760                 else
761                         return(s->ctx->client_CA);
762                 }
763         }
764
765 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
766         {
767         X509_NAME *name;
768
769         if (x == NULL) return(0);
770         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
771                 return(0);
772                 
773         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
774                 return(0);
775
776         if (!sk_X509_NAME_push(*sk,name))
777                 {
778                 X509_NAME_free(name);
779                 return(0);
780                 }
781         return(1);
782         }
783
784 int SSL_add_client_CA(SSL *ssl,X509 *x)
785         {
786         return(add_client_CA(&(ssl->client_CA),x));
787         }
788
789 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
790         {
791         return(add_client_CA(&(ctx->client_CA),x));
792         }
793
794 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
795         {
796         return(X509_NAME_cmp(*a,*b));
797         }
798
799 #ifndef OPENSSL_NO_STDIO
800 /*!
801  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
802  * it doesn't really have anything to do with clients (except that a common use
803  * for a stack of CAs is to send it to the client). Actually, it doesn't have
804  * much to do with CAs, either, since it will load any old cert.
805  * \param file the file containing one or more certs.
806  * \return a ::STACK containing the certs.
807  */
808 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
809         {
810         BIO *in;
811         X509 *x=NULL;
812         X509_NAME *xn=NULL;
813         STACK_OF(X509_NAME) *ret = NULL,*sk;
814
815         sk=sk_X509_NAME_new(xname_cmp);
816
817         in=BIO_new(BIO_s_file_internal());
818
819         if ((sk == NULL) || (in == NULL))
820                 {
821                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
822                 goto err;
823                 }
824         
825         if (!BIO_read_filename(in,file))
826                 goto err;
827
828         for (;;)
829                 {
830                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
831                         break;
832                 if (ret == NULL)
833                         {
834                         ret = sk_X509_NAME_new_null();
835                         if (ret == NULL)
836                                 {
837                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
838                                 goto err;
839                                 }
840                         }
841                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
842                 /* check for duplicates */
843                 xn=X509_NAME_dup(xn);
844                 if (xn == NULL) goto err;
845                 if (sk_X509_NAME_find(sk,xn) >= 0)
846                         X509_NAME_free(xn);
847                 else
848                         {
849                         sk_X509_NAME_push(sk,xn);
850                         sk_X509_NAME_push(ret,xn);
851                         }
852                 }
853
854         if (0)
855                 {
856 err:
857                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
858                 ret=NULL;
859                 }
860         if (sk != NULL) sk_X509_NAME_free(sk);
861         if (in != NULL) BIO_free(in);
862         if (x != NULL) X509_free(x);
863         if (ret != NULL)
864                 ERR_clear_error();
865         return(ret);
866         }
867 #endif
868
869 /*!
870  * Add a file of certs to a stack.
871  * \param stack the stack to add to.
872  * \param file the file to add from. All certs in this file that are not
873  * already in the stack will be added.
874  * \return 1 for success, 0 for failure. Note that in the case of failure some
875  * certs may have been added to \c stack.
876  */
877
878 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
879                                         const char *file)
880         {
881         BIO *in;
882         X509 *x=NULL;
883         X509_NAME *xn=NULL;
884         int ret=1;
885         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
886         
887         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
888         
889         in=BIO_new(BIO_s_file_internal());
890         
891         if (in == NULL)
892                 {
893                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
894                 goto err;
895                 }
896         
897         if (!BIO_read_filename(in,file))
898                 goto err;
899         
900         for (;;)
901                 {
902                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
903                         break;
904                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
905                 xn=X509_NAME_dup(xn);
906                 if (xn == NULL) goto err;
907                 if (sk_X509_NAME_find(stack,xn) >= 0)
908                         X509_NAME_free(xn);
909                 else
910                         sk_X509_NAME_push(stack,xn);
911                 }
912
913         ERR_clear_error();
914
915         if (0)
916                 {
917 err:
918                 ret=0;
919                 }
920         if(in != NULL)
921                 BIO_free(in);
922         if(x != NULL)
923                 X509_free(x);
924         
925         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
926
927         return ret;
928         }
929
930 /*!
931  * Add a directory of certs to a stack.
932  * \param stack the stack to append to.
933  * \param dir the directory to append from. All files in this directory will be
934  * examined as potential certs. Any that are acceptable to
935  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
936  * included.
937  * \return 1 for success, 0 for failure. Note that in the case of failure some
938  * certs may have been added to \c stack.
939  */
940
941 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
942                                        const char *dir)
943         {
944         OPENSSL_DIR_CTX *d = NULL;
945         const char *filename;
946         int ret = 0;
947
948         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
949
950         /* Note that a side effect is that the CAs will be sorted by name */
951
952         while((filename = OPENSSL_DIR_read(&d, dir)))
953                 {
954                 char buf[1024];
955                 int r;
956
957                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
958                         {
959                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
960                         goto err;
961                         }
962
963 #ifdef OPENSSL_SYS_VMS
964                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
965 #else
966                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
967 #endif
968                 if (r <= 0 || r >= (int)sizeof(buf))
969                         goto err;
970                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
971                         goto err;
972                 }
973
974         if (errno)
975                 {
976                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
977                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
978                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
979                 goto err;
980                 }
981
982         ret = 1;
983
984 err:
985         if (d) OPENSSL_DIR_end(&d);
986         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
987         return ret;
988         }
989
990 /* Add a certificate to a BUF_MEM structure */
991
992 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
993         {
994         int n;
995         unsigned char *p;
996
997         n=i2d_X509(x,NULL);
998         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
999                 {
1000                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1001                 return 0;
1002                 }
1003         p=(unsigned char *)&(buf->data[*l]);
1004         l2n3(n,p);
1005         i2d_X509(x,&p);
1006         *l+=n+3;
1007
1008         return 1;
1009         }
1010
1011 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1012 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1013         {
1014         BUF_MEM *buf = s->init_buf;
1015         int no_chain;
1016         int i;
1017
1018         X509 *x;
1019         STACK_OF(X509) *extra_certs;
1020
1021         if (cpk)
1022                 x = cpk->x509;
1023         else
1024                 x = NULL;
1025
1026         /* If we have a certificate specific chain use it, else use
1027          * parent ctx.
1028          */
1029         if (cpk && cpk->chain)
1030                 extra_certs = cpk->chain;
1031         else
1032                 extra_certs = s->ctx->extra_certs;
1033
1034         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1035                 no_chain = 1;
1036         else
1037                 no_chain = 0;
1038
1039         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1040         if (!BUF_MEM_grow_clean(buf,10))
1041                 {
1042                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1043                 return 0;
1044                 }
1045         if (x != NULL)
1046                 {
1047                 if (no_chain)
1048                         {
1049                         if (!ssl_add_cert_to_buf(buf, l, x))
1050                                 return 0;
1051                         }
1052                 else
1053                         {
1054                         X509_STORE_CTX xs_ctx;
1055
1056                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
1057                                 {
1058                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1059                                 return(0);
1060                                 }
1061                         X509_verify_cert(&xs_ctx);
1062                         /* Don't leave errors in the queue */
1063                         ERR_clear_error();
1064                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1065                                 {
1066                                 x = sk_X509_value(xs_ctx.chain, i);
1067
1068                                 if (!ssl_add_cert_to_buf(buf, l, x))
1069                                         {
1070                                         X509_STORE_CTX_cleanup(&xs_ctx);
1071                                         return 0;
1072                                         }
1073                                 }
1074                         X509_STORE_CTX_cleanup(&xs_ctx);
1075                         }
1076                 }
1077         for (i=0; i<sk_X509_num(extra_certs); i++)
1078                 {
1079                 x=sk_X509_value(extra_certs,i);
1080                 if (!ssl_add_cert_to_buf(buf, l, x))
1081                         return 0;
1082                 }
1083
1084         return 1;
1085         }
1086