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