4205f6e6cccee320c6d662e0a60d341547199b8d
[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_dss1();
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_ecdsa();
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                 if (cert->pkeys[i].authz != NULL)
338                         {
339                         /* Just copy everything. */
340                         ret->pkeys[i].authz_length =
341                                 cert->pkeys[i].authz_length;
342                         ret->pkeys[i].authz =
343                                 OPENSSL_malloc(ret->pkeys[i].authz_length);
344                         if (ret->pkeys[i].authz == NULL)
345                                 {
346                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
347                                 return(NULL);
348                                 }
349                         memcpy(ret->pkeys[i].authz,
350                                cert->pkeys[i].authz,
351                                cert->pkeys[i].authz_length);
352                         }
353                 }
354         
355         ret->references=1;
356         /* Set digests to defaults. NB: we don't copy existing values as they
357          * will be set during handshake.
358          */
359         ssl_cert_set_default_md(ret);
360         /* Peer sigalgs set to NULL as we get these from handshake too */
361         ret->peer_sigalgs = NULL;
362         ret->peer_sigalgslen = 0;
363         /* Configure sigalgs however we copy across */
364         if (cert->conf_sigalgs)
365                 {
366                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen
367                                                         * sizeof(TLS_SIGALGS));
368                 if (!ret->conf_sigalgs)
369                         goto err;
370                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
371                                 cert->conf_sigalgslen * sizeof(TLS_SIGALGS));
372                 ret->conf_sigalgslen = cert->conf_sigalgslen;
373                 }
374         else
375                 ret->conf_sigalgs = NULL;
376         /* Shared sigalgs also NULL */
377         ret->shared_sigalgs = NULL;
378
379         return(ret);
380         
381 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
382 err:
383 #endif
384 #ifndef OPENSSL_NO_RSA
385         if (ret->rsa_tmp != NULL)
386                 RSA_free(ret->rsa_tmp);
387 #endif
388 #ifndef OPENSSL_NO_DH
389         if (ret->dh_tmp != NULL)
390                 DH_free(ret->dh_tmp);
391 #endif
392 #ifndef OPENSSL_NO_ECDH
393         if (ret->ecdh_tmp != NULL)
394                 EC_KEY_free(ret->ecdh_tmp);
395 #endif
396
397         ssl_cert_clear_certs(ret);
398
399         return NULL;
400         }
401
402 /* Free up and clear all certificates and chains */
403
404 void ssl_cert_clear_certs(CERT *c)
405         {
406         int i;
407         if (c == NULL)
408                 return;
409         for (i = 0; i<SSL_PKEY_NUM; i++)
410                 {
411                 CERT_PKEY *cpk = c->pkeys + i;
412                 if (cpk->x509)
413                         {
414                         X509_free(cpk->x509);
415                         cpk->x509 = NULL;
416                         }
417                 if (cpk->privatekey)
418                         {
419                         EVP_PKEY_free(cpk->privatekey);
420                         cpk->privatekey = NULL;
421                         }
422                 if (cpk->chain)
423                         {
424                         sk_X509_pop_free(cpk->chain, X509_free);
425                         cpk->chain = NULL;
426                         }
427 #ifndef OPENSSL_NO_TLSEXT
428                 if (cpk->authz != NULL)
429                         OPENSSL_free(cpk->authz);
430 #endif
431                 }
432         }
433
434 void ssl_cert_free(CERT *c)
435         {
436         int i;
437
438         if(c == NULL)
439             return;
440
441         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
442 #ifdef REF_PRINT
443         REF_PRINT("CERT",c);
444 #endif
445         if (i > 0) return;
446 #ifdef REF_CHECK
447         if (i < 0)
448                 {
449                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
450                 abort(); /* ok */
451                 }
452 #endif
453
454 #ifndef OPENSSL_NO_RSA
455         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
456 #endif
457 #ifndef OPENSSL_NO_DH
458         if (c->dh_tmp) DH_free(c->dh_tmp);
459 #endif
460 #ifndef OPENSSL_NO_ECDH
461         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
462 #endif
463
464         ssl_cert_clear_certs(c);
465         if (c->peer_sigalgs)
466                 OPENSSL_free(c->peer_sigalgs);
467         if (c->conf_sigalgs)
468                 OPENSSL_free(c->conf_sigalgs);
469         if (c->shared_sigalgs)
470                 OPENSSL_free(c->shared_sigalgs);
471         OPENSSL_free(c);
472         }
473
474 int ssl_cert_inst(CERT **o)
475         {
476         /* Create a CERT if there isn't already one
477          * (which cannot really happen, as it is initially created in
478          * SSL_CTX_new; but the earlier code usually allows for that one
479          * being non-existant, so we follow that behaviour, as it might
480          * turn out that there actually is a reason for it -- but I'm
481          * not sure that *all* of the existing code could cope with
482          * s->cert being NULL, otherwise we could do without the
483          * initialization in SSL_CTX_new).
484          */
485         
486         if (o == NULL) 
487                 {
488                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
489                 return(0);
490                 }
491         if (*o == NULL)
492                 {
493                 if ((*o = ssl_cert_new()) == NULL)
494                         {
495                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
496                         return(0);
497                         }
498                 }
499         return(1);
500         }
501
502 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
503         {
504         CERT_PKEY *cpk = c->key;
505         if (!cpk)
506                 return 0;
507         if (cpk->chain)
508                 sk_X509_pop_free(cpk->chain, X509_free);
509         cpk->chain = chain;
510         return 1;
511         }
512
513 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
514         {
515         STACK_OF(X509) *dchain;
516         X509 *x;
517         int i;
518         if (!chain)
519                 return ssl_cert_set0_chain(c, NULL);
520         dchain = sk_X509_dup(chain);
521         if (!dchain)
522                 return 0;
523         for (i = 0; i < sk_X509_num(dchain); i++)
524                 {
525                 x = sk_X509_value(dchain, i);
526                 CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
527                 }
528         if (!ssl_cert_set0_chain(c, dchain))
529                 {
530                 sk_X509_pop_free(dchain, X509_free);
531                 return 0;
532                 }
533         return 1;
534         }
535
536 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
537         {
538         CERT_PKEY *cpk = c->key;
539         if (!cpk)
540                 return 0;
541         if (!cpk->chain)
542                 cpk->chain = sk_X509_new_null();
543         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
544                 return 0;
545         return 1;
546         }
547
548 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
549         {
550         if (!ssl_cert_add0_chain_cert(c, x))
551                 return 0;
552         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
553         return 1;
554         }
555
556 SESS_CERT *ssl_sess_cert_new(void)
557         {
558         SESS_CERT *ret;
559
560         ret = OPENSSL_malloc(sizeof *ret);
561         if (ret == NULL)
562                 {
563                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
564                 return NULL;
565                 }
566
567         memset(ret, 0 ,sizeof *ret);
568         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
569         ret->references = 1;
570
571         return ret;
572         }
573
574 void ssl_sess_cert_free(SESS_CERT *sc)
575         {
576         int i;
577
578         if (sc == NULL)
579                 return;
580
581         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
582 #ifdef REF_PRINT
583         REF_PRINT("SESS_CERT", sc);
584 #endif
585         if (i > 0)
586                 return;
587 #ifdef REF_CHECK
588         if (i < 0)
589                 {
590                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
591                 abort(); /* ok */
592                 }
593 #endif
594
595         /* i == 0 */
596         if (sc->cert_chain != NULL)
597                 sk_X509_pop_free(sc->cert_chain, X509_free);
598         for (i = 0; i < SSL_PKEY_NUM; i++)
599                 {
600                 if (sc->peer_pkeys[i].x509 != NULL)
601                         X509_free(sc->peer_pkeys[i].x509);
602 #if 0 /* We don't have the peer's private key.  These lines are just
603            * here as a reminder that we're still using a not-quite-appropriate
604            * data structure. */
605                 if (sc->peer_pkeys[i].privatekey != NULL)
606                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
607 #endif
608                 }
609
610 #ifndef OPENSSL_NO_RSA
611         if (sc->peer_rsa_tmp != NULL)
612                 RSA_free(sc->peer_rsa_tmp);
613 #endif
614 #ifndef OPENSSL_NO_DH
615         if (sc->peer_dh_tmp != NULL)
616                 DH_free(sc->peer_dh_tmp);
617 #endif
618 #ifndef OPENSSL_NO_ECDH
619         if (sc->peer_ecdh_tmp != NULL)
620                 EC_KEY_free(sc->peer_ecdh_tmp);
621 #endif
622
623         OPENSSL_free(sc);
624         }
625
626 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
627         {
628         sc->peer_cert_type = type;
629         return(1);
630         }
631
632 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
633         {
634         X509 *x;
635         int i;
636         X509_STORE_CTX ctx;
637
638         if ((sk == NULL) || (sk_X509_num(sk) == 0))
639                 return(0);
640
641         x=sk_X509_value(sk,0);
642         if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
643                 {
644                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
645                 return(0);
646                 }
647 #if 0
648         if (SSL_get_verify_depth(s) >= 0)
649                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
650 #endif
651         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
652
653         /* We need to inherit the verify parameters. These can be determined by
654          * the context: if its a server it will verify SSL client certificates
655          * or vice versa.
656          */
657
658         X509_STORE_CTX_set_default(&ctx,
659                                 s->server ? "ssl_client" : "ssl_server");
660         /* Anything non-default in "param" should overwrite anything in the
661          * ctx.
662          */
663         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
664
665         if (s->verify_callback)
666                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
667
668         if (s->ctx->app_verify_callback != NULL)
669 #if 1 /* new with OpenSSL 0.9.7 */
670                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
671 #else
672                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
673 #endif
674         else
675                 {
676 #ifndef OPENSSL_NO_X509_VERIFY
677                 i=X509_verify_cert(&ctx);
678 #else
679                 i=0;
680                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
681                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
682 #endif
683                 }
684
685         s->verify_result=ctx.error;
686         X509_STORE_CTX_cleanup(&ctx);
687
688         return(i);
689         }
690
691 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
692         {
693         if (*ca_list != NULL)
694                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
695
696         *ca_list=name_list;
697         }
698
699 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
700         {
701         int i;
702         STACK_OF(X509_NAME) *ret;
703         X509_NAME *name;
704
705         ret=sk_X509_NAME_new_null();
706         for (i=0; i<sk_X509_NAME_num(sk); i++)
707                 {
708                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
709                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
710                         {
711                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
712                         return(NULL);
713                         }
714                 }
715         return(ret);
716         }
717
718 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
719         {
720         set_client_CA_list(&(s->client_CA),name_list);
721         }
722
723 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
724         {
725         set_client_CA_list(&(ctx->client_CA),name_list);
726         }
727
728 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
729         {
730         return(ctx->client_CA);
731         }
732
733 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
734         {
735         if (s->type == SSL_ST_CONNECT)
736                 { /* we are in the client */
737                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
738                         (s->s3 != NULL))
739                         return(s->s3->tmp.ca_names);
740                 else
741                         return(NULL);
742                 }
743         else
744                 {
745                 if (s->client_CA != NULL)
746                         return(s->client_CA);
747                 else
748                         return(s->ctx->client_CA);
749                 }
750         }
751
752 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
753         {
754         X509_NAME *name;
755
756         if (x == NULL) return(0);
757         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
758                 return(0);
759                 
760         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
761                 return(0);
762
763         if (!sk_X509_NAME_push(*sk,name))
764                 {
765                 X509_NAME_free(name);
766                 return(0);
767                 }
768         return(1);
769         }
770
771 int SSL_add_client_CA(SSL *ssl,X509 *x)
772         {
773         return(add_client_CA(&(ssl->client_CA),x));
774         }
775
776 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
777         {
778         return(add_client_CA(&(ctx->client_CA),x));
779         }
780
781 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
782         {
783         return(X509_NAME_cmp(*a,*b));
784         }
785
786 #ifndef OPENSSL_NO_STDIO
787 /*!
788  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
789  * it doesn't really have anything to do with clients (except that a common use
790  * for a stack of CAs is to send it to the client). Actually, it doesn't have
791  * much to do with CAs, either, since it will load any old cert.
792  * \param file the file containing one or more certs.
793  * \return a ::STACK containing the certs.
794  */
795 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
796         {
797         BIO *in;
798         X509 *x=NULL;
799         X509_NAME *xn=NULL;
800         STACK_OF(X509_NAME) *ret = NULL,*sk;
801
802         sk=sk_X509_NAME_new(xname_cmp);
803
804         in=BIO_new(BIO_s_file_internal());
805
806         if ((sk == NULL) || (in == NULL))
807                 {
808                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
809                 goto err;
810                 }
811         
812         if (!BIO_read_filename(in,file))
813                 goto err;
814
815         for (;;)
816                 {
817                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
818                         break;
819                 if (ret == NULL)
820                         {
821                         ret = sk_X509_NAME_new_null();
822                         if (ret == NULL)
823                                 {
824                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
825                                 goto err;
826                                 }
827                         }
828                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
829                 /* check for duplicates */
830                 xn=X509_NAME_dup(xn);
831                 if (xn == NULL) goto err;
832                 if (sk_X509_NAME_find(sk,xn) >= 0)
833                         X509_NAME_free(xn);
834                 else
835                         {
836                         sk_X509_NAME_push(sk,xn);
837                         sk_X509_NAME_push(ret,xn);
838                         }
839                 }
840
841         if (0)
842                 {
843 err:
844                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
845                 ret=NULL;
846                 }
847         if (sk != NULL) sk_X509_NAME_free(sk);
848         if (in != NULL) BIO_free(in);
849         if (x != NULL) X509_free(x);
850         if (ret != NULL)
851                 ERR_clear_error();
852         return(ret);
853         }
854 #endif
855
856 /*!
857  * Add a file of certs to a stack.
858  * \param stack the stack to add to.
859  * \param file the file to add from. All certs in this file that are not
860  * already in the stack will be added.
861  * \return 1 for success, 0 for failure. Note that in the case of failure some
862  * certs may have been added to \c stack.
863  */
864
865 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
866                                         const char *file)
867         {
868         BIO *in;
869         X509 *x=NULL;
870         X509_NAME *xn=NULL;
871         int ret=1;
872         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
873         
874         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
875         
876         in=BIO_new(BIO_s_file_internal());
877         
878         if (in == NULL)
879                 {
880                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
881                 goto err;
882                 }
883         
884         if (!BIO_read_filename(in,file))
885                 goto err;
886         
887         for (;;)
888                 {
889                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
890                         break;
891                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
892                 xn=X509_NAME_dup(xn);
893                 if (xn == NULL) goto err;
894                 if (sk_X509_NAME_find(stack,xn) >= 0)
895                         X509_NAME_free(xn);
896                 else
897                         sk_X509_NAME_push(stack,xn);
898                 }
899
900         ERR_clear_error();
901
902         if (0)
903                 {
904 err:
905                 ret=0;
906                 }
907         if(in != NULL)
908                 BIO_free(in);
909         if(x != NULL)
910                 X509_free(x);
911         
912         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
913
914         return ret;
915         }
916
917 /*!
918  * Add a directory of certs to a stack.
919  * \param stack the stack to append to.
920  * \param dir the directory to append from. All files in this directory will be
921  * examined as potential certs. Any that are acceptable to
922  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
923  * included.
924  * \return 1 for success, 0 for failure. Note that in the case of failure some
925  * certs may have been added to \c stack.
926  */
927
928 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
929                                        const char *dir)
930         {
931         OPENSSL_DIR_CTX *d = NULL;
932         const char *filename;
933         int ret = 0;
934
935         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
936
937         /* Note that a side effect is that the CAs will be sorted by name */
938
939         while((filename = OPENSSL_DIR_read(&d, dir)))
940                 {
941                 char buf[1024];
942                 int r;
943
944                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
945                         {
946                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
947                         goto err;
948                         }
949
950 #ifdef OPENSSL_SYS_VMS
951                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
952 #else
953                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
954 #endif
955                 if (r <= 0 || r >= (int)sizeof(buf))
956                         goto err;
957                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
958                         goto err;
959                 }
960
961         if (errno)
962                 {
963                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
964                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
965                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
966                 goto err;
967                 }
968
969         ret = 1;
970
971 err:
972         if (d) OPENSSL_DIR_end(&d);
973         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
974         return ret;
975         }
976
977 /* Add a certificate to a BUF_MEM structure */
978
979 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
980         {
981         int n;
982         unsigned char *p;
983
984         n=i2d_X509(x,NULL);
985         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
986                 {
987                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
988                 return 0;
989                 }
990         p=(unsigned char *)&(buf->data[*l]);
991         l2n3(n,p);
992         i2d_X509(x,&p);
993         *l+=n+3;
994
995         return 1;
996         }
997
998 /* Add certificate chain to internal SSL BUF_MEM strcuture */
999 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1000         {
1001         BUF_MEM *buf = s->init_buf;
1002         int no_chain;
1003         int i;
1004
1005         X509 *x;
1006         STACK_OF(X509) *extra_certs;
1007
1008         if (cpk)
1009                 x = cpk->x509;
1010         else
1011                 x = NULL;
1012
1013         /* If we have a certificate specific chain use it, else use
1014          * parent ctx.
1015          */
1016         if (cpk && cpk->chain)
1017                 extra_certs = cpk->chain;
1018         else
1019                 extra_certs = s->ctx->extra_certs;
1020
1021         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1022                 no_chain = 1;
1023         else
1024                 no_chain = 0;
1025
1026         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1027         if (!BUF_MEM_grow_clean(buf,10))
1028                 {
1029                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1030                 return 0;
1031                 }
1032         if (x != NULL)
1033                 {
1034                 if (no_chain)
1035                         {
1036                         if (!ssl_add_cert_to_buf(buf, l, x))
1037                                 return 0;
1038                         }
1039                 else
1040                         {
1041                         X509_STORE_CTX xs_ctx;
1042
1043                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
1044                                 {
1045                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1046                                 return(0);
1047                                 }
1048                         X509_verify_cert(&xs_ctx);
1049                         /* Don't leave errors in the queue */
1050                         ERR_clear_error();
1051                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1052                                 {
1053                                 x = sk_X509_value(xs_ctx.chain, i);
1054
1055                                 if (!ssl_add_cert_to_buf(buf, l, x))
1056                                         {
1057                                         X509_STORE_CTX_cleanup(&xs_ctx);
1058                                         return 0;
1059                                         }
1060                                 }
1061                         X509_STORE_CTX_cleanup(&xs_ctx);
1062                         }
1063                 }
1064         for (i=0; i<sk_X509_num(extra_certs); i++)
1065                 {
1066                 x=sk_X509_value(extra_certs,i);
1067                 if (!ssl_add_cert_to_buf(buf, l, x))
1068                         return 0;
1069                 }
1070
1071         return 1;
1072         }
1073