Return per-certificate chain if extra chain is NULL.
[openssl.git] / ssl / ssl_cert.c
1 /*! \file ssl/ssl_cert.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58 /* ====================================================================
59  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
60  *
61  * Redistribution and use in source and binary forms, with or without
62  * modification, are permitted provided that the following conditions
63  * are met:
64  *
65  * 1. Redistributions of source code must retain the above copyright
66  *    notice, this list of conditions and the following disclaimer. 
67  *
68  * 2. Redistributions in binary form must reproduce the above copyright
69  *    notice, this list of conditions and the following disclaimer in
70  *    the documentation and/or other materials provided with the
71  *    distribution.
72  *
73  * 3. All advertising materials mentioning features or use of this
74  *    software must display the following acknowledgment:
75  *    "This product includes software developed by the OpenSSL Project
76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77  *
78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79  *    endorse or promote products derived from this software without
80  *    prior written permission. For written permission, please contact
81  *    openssl-core@openssl.org.
82  *
83  * 5. Products derived from this software may not be called "OpenSSL"
84  *    nor may "OpenSSL" appear in their names without prior written
85  *    permission of the OpenSSL Project.
86  *
87  * 6. Redistributions of any form whatsoever must retain the following
88  *    acknowledgment:
89  *    "This product includes software developed by the OpenSSL Project
90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91  *
92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103  * OF THE POSSIBILITY OF SUCH DAMAGE.
104  * ====================================================================
105  *
106  * This product includes cryptographic software written by Eric Young
107  * (eay@cryptsoft.com).  This product includes software written by Tim
108  * Hudson (tjh@cryptsoft.com).
109  *
110  */
111 /* ====================================================================
112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113  * ECC cipher suite support in OpenSSL originally developed by 
114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115  */
116
117 #include <stdio.h>
118
119 #include "e_os.h"
120 #ifndef NO_SYS_TYPES_H
121 # include <sys/types.h>
122 #endif
123
124 #include "o_dir.h"
125 #include <openssl/objects.h>
126 #include <openssl/bio.h>
127 #include <openssl/pem.h>
128 #include <openssl/x509v3.h>
129 #ifndef OPENSSL_NO_DH
130 #include <openssl/dh.h>
131 #endif
132 #include <openssl/bn.h>
133 #include "ssl_locl.h"
134
135 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
136         {
137         static volatile int ssl_x509_store_ctx_idx= -1;
138         int got_write_lock = 0;
139
140         CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
141
142         if (ssl_x509_store_ctx_idx < 0)
143                 {
144                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
145                 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
146                 got_write_lock = 1;
147                 
148                 if (ssl_x509_store_ctx_idx < 0)
149                         {
150                         ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
151                                 0,"SSL for verify callback",NULL,NULL,NULL);
152                         }
153                 }
154
155         if (got_write_lock)
156                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
157         else
158                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
159         
160         return ssl_x509_store_ctx_idx;
161         }
162
163 void ssl_cert_set_default_md(CERT *cert)
164         {
165         /* Set digest values to defaults */
166 #ifndef OPENSSL_NO_DSA
167         cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
168 #endif
169 #ifndef OPENSSL_NO_RSA
170         cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
171         cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
172 #endif
173 #ifndef OPENSSL_NO_ECDSA
174         cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
175 #endif
176         }
177
178 CERT *ssl_cert_new(void)
179         {
180         CERT *ret;
181
182         ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
183         if (ret == NULL)
184                 {
185                 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
186                 return(NULL);
187                 }
188         memset(ret,0,sizeof(CERT));
189
190         ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
191         ret->references=1;
192         ssl_cert_set_default_md(ret);
193         return(ret);
194         }
195
196 CERT *ssl_cert_dup(CERT *cert)
197         {
198         CERT *ret;
199         int i;
200
201         ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
202         if (ret == NULL)
203                 {
204                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
205                 return(NULL);
206                 }
207
208         memset(ret, 0, sizeof(CERT));
209
210         ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
211         /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
212          * if you find that more readable */
213
214         ret->valid = cert->valid;
215         ret->mask_k = cert->mask_k;
216         ret->mask_a = cert->mask_a;
217         ret->export_mask_k = cert->export_mask_k;
218         ret->export_mask_a = cert->export_mask_a;
219
220 #ifndef OPENSSL_NO_RSA
221         if (cert->rsa_tmp != NULL)
222                 {
223                 RSA_up_ref(cert->rsa_tmp);
224                 ret->rsa_tmp = cert->rsa_tmp;
225                 }
226         ret->rsa_tmp_cb = cert->rsa_tmp_cb;
227 #endif
228
229 #ifndef OPENSSL_NO_DH
230         if (cert->dh_tmp != NULL)
231                 {
232                 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
233                 if (ret->dh_tmp == NULL)
234                         {
235                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
236                         goto err;
237                         }
238                 if (cert->dh_tmp->priv_key)
239                         {
240                         BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
241                         if (!b)
242                                 {
243                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
244                                 goto err;
245                                 }
246                         ret->dh_tmp->priv_key = b;
247                         }
248                 if (cert->dh_tmp->pub_key)
249                         {
250                         BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
251                         if (!b)
252                                 {
253                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
254                                 goto err;
255                                 }
256                         ret->dh_tmp->pub_key = b;
257                         }
258                 }
259         ret->dh_tmp_cb = cert->dh_tmp_cb;
260 #endif
261
262 #ifndef OPENSSL_NO_ECDH
263         if (cert->ecdh_tmp)
264                 {
265                 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
266                 if (ret->ecdh_tmp == NULL)
267                         {
268                         SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
269                         goto err;
270                         }
271                 }
272         ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
273         ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
274 #endif
275
276         for (i = 0; i < SSL_PKEY_NUM; i++)
277                 {
278                 CERT_PKEY *cpk = cert->pkeys + i;
279                 CERT_PKEY *rpk = ret->pkeys + i;
280                 if (cpk->x509 != NULL)
281                         {
282                         rpk->x509 = cpk->x509;
283                         CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
284                         }
285                 
286                 if (cpk->privatekey != NULL)
287                         {
288                         rpk->privatekey = cpk->privatekey;
289                         CRYPTO_add(&cpk->privatekey->references, 1,
290                                 CRYPTO_LOCK_EVP_PKEY);
291
292                         switch(i) 
293                                 {
294                                 /* If there was anything special to do for
295                                  * certain types of keys, we'd do it here.
296                                  * (Nothing at the moment, I think.) */
297
298                         case SSL_PKEY_RSA_ENC:
299                         case SSL_PKEY_RSA_SIGN:
300                                 /* We have an RSA key. */
301                                 break;
302                                 
303                         case SSL_PKEY_DSA_SIGN:
304                                 /* We have a DSA key. */
305                                 break;
306                                 
307                         case SSL_PKEY_DH_RSA:
308                         case SSL_PKEY_DH_DSA:
309                                 /* We have a DH key. */
310                                 break;
311
312                         case SSL_PKEY_ECC:
313                                 /* We have an ECC key */
314                                 break;
315
316                         default:
317                                 /* Can't happen. */
318                                 SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
319                                 }
320                         }
321
322                 if (cpk->chain)
323                         {
324                         rpk->chain = X509_chain_up_ref(cpk->chain);
325                         if (!rpk->chain)
326                                 {
327                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
328                                 goto err;
329                                 }
330                         }
331                 rpk->valid_flags = 0;
332 #ifndef OPENSSL_NO_TLSEXT
333                 if (cert->pkeys[i].serverinfo != NULL)
334                         {
335                         /* Just copy everything. */
336                         ret->pkeys[i].serverinfo =
337                                 OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
338                         if (ret->pkeys[i].serverinfo == NULL)
339                                 {
340                                 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
341                                 return NULL;
342                                 }
343                         ret->pkeys[i].serverinfo_length =
344                                 cert->pkeys[i].serverinfo_length;
345                         memcpy(ret->pkeys[i].serverinfo,
346                                cert->pkeys[i].serverinfo,
347                                cert->pkeys[i].serverinfo_length);
348                         }
349 #endif
350                 }
351         
352         ret->references=1;
353         /* Set digests to defaults. NB: we don't copy existing values as they
354          * will be set during handshake.
355          */
356         ssl_cert_set_default_md(ret);
357         /* Peer sigalgs set to NULL as we get these from handshake too */
358         ret->peer_sigalgs = NULL;
359         ret->peer_sigalgslen = 0;
360         /* Configured sigalgs however we copy across */
361
362         if (cert->conf_sigalgs)
363                 {
364                 ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
365                 if (!ret->conf_sigalgs)
366                         goto err;
367                 memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
368                                                 cert->conf_sigalgslen);
369                 ret->conf_sigalgslen = cert->conf_sigalgslen;
370                 }
371         else
372                 ret->conf_sigalgs = NULL;
373
374         if (cert->client_sigalgs)
375                 {
376                 ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
377                 if (!ret->client_sigalgs)
378                         goto err;
379                 memcpy(ret->client_sigalgs, cert->client_sigalgs,
380                                                 cert->client_sigalgslen);
381                 ret->client_sigalgslen = cert->client_sigalgslen;
382                 }
383         else
384                 ret->client_sigalgs = NULL;
385         /* Shared sigalgs also NULL */
386         ret->shared_sigalgs = NULL;
387         /* Copy any custom client certificate types */
388         if (cert->ctypes)
389                 {
390                 ret->ctypes = OPENSSL_malloc(cert->ctype_num);
391                 if (!ret->ctypes)
392                         goto err;
393                 memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
394                 ret->ctype_num = cert->ctype_num;
395                 }
396
397         ret->cert_flags = cert->cert_flags;
398
399         ret->cert_cb = cert->cert_cb;
400         ret->cert_cb_arg = cert->cert_cb_arg;
401
402         if (cert->verify_store)
403                 {
404                 CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
405                 ret->verify_store = cert->verify_store;
406                 }
407
408         if (cert->chain_store)
409                 {
410                 CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
411                 ret->chain_store = cert->chain_store;
412                 }
413
414         ret->ciphers_raw = NULL;
415
416         return(ret);
417         
418 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
419 err:
420 #endif
421 #ifndef OPENSSL_NO_RSA
422         if (ret->rsa_tmp != NULL)
423                 RSA_free(ret->rsa_tmp);
424 #endif
425 #ifndef OPENSSL_NO_DH
426         if (ret->dh_tmp != NULL)
427                 DH_free(ret->dh_tmp);
428 #endif
429 #ifndef OPENSSL_NO_ECDH
430         if (ret->ecdh_tmp != NULL)
431                 EC_KEY_free(ret->ecdh_tmp);
432 #endif
433
434         ssl_cert_clear_certs(ret);
435
436         return NULL;
437         }
438
439 /* Free up and clear all certificates and chains */
440
441 void ssl_cert_clear_certs(CERT *c)
442         {
443         int i;
444         if (c == NULL)
445                 return;
446         for (i = 0; i<SSL_PKEY_NUM; i++)
447                 {
448                 CERT_PKEY *cpk = c->pkeys + i;
449                 if (cpk->x509)
450                         {
451                         X509_free(cpk->x509);
452                         cpk->x509 = NULL;
453                         }
454                 if (cpk->privatekey)
455                         {
456                         EVP_PKEY_free(cpk->privatekey);
457                         cpk->privatekey = NULL;
458                         }
459                 if (cpk->chain)
460                         {
461                         sk_X509_pop_free(cpk->chain, X509_free);
462                         cpk->chain = NULL;
463                         }
464 #ifndef OPENSSL_NO_TLSEXT
465                 if (cpk->serverinfo)
466                         {
467                         OPENSSL_free(cpk->serverinfo);
468                         cpk->serverinfo = NULL;
469                         cpk->serverinfo_length = 0;
470                         }
471 #endif
472                 /* Clear all flags apart from explicit sign */
473                 cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
474                 }
475         }
476
477 void ssl_cert_free(CERT *c)
478         {
479         int i;
480
481         if(c == NULL)
482             return;
483
484         i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
485 #ifdef REF_PRINT
486         REF_PRINT("CERT",c);
487 #endif
488         if (i > 0) return;
489 #ifdef REF_CHECK
490         if (i < 0)
491                 {
492                 fprintf(stderr,"ssl_cert_free, bad reference count\n");
493                 abort(); /* ok */
494                 }
495 #endif
496
497 #ifndef OPENSSL_NO_RSA
498         if (c->rsa_tmp) RSA_free(c->rsa_tmp);
499 #endif
500 #ifndef OPENSSL_NO_DH
501         if (c->dh_tmp) DH_free(c->dh_tmp);
502 #endif
503 #ifndef OPENSSL_NO_ECDH
504         if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
505 #endif
506
507         ssl_cert_clear_certs(c);
508         if (c->peer_sigalgs)
509                 OPENSSL_free(c->peer_sigalgs);
510         if (c->conf_sigalgs)
511                 OPENSSL_free(c->conf_sigalgs);
512         if (c->client_sigalgs)
513                 OPENSSL_free(c->client_sigalgs);
514         if (c->shared_sigalgs)
515                 OPENSSL_free(c->shared_sigalgs);
516         if (c->ctypes)
517                 OPENSSL_free(c->ctypes);
518         if (c->verify_store)
519                 X509_STORE_free(c->verify_store);
520         if (c->chain_store)
521                 X509_STORE_free(c->chain_store);
522         if (c->ciphers_raw)
523                 OPENSSL_free(c->ciphers_raw);
524         OPENSSL_free(c);
525         }
526
527 int ssl_cert_inst(CERT **o)
528         {
529         /* Create a CERT if there isn't already one
530          * (which cannot really happen, as it is initially created in
531          * SSL_CTX_new; but the earlier code usually allows for that one
532          * being non-existant, so we follow that behaviour, as it might
533          * turn out that there actually is a reason for it -- but I'm
534          * not sure that *all* of the existing code could cope with
535          * s->cert being NULL, otherwise we could do without the
536          * initialization in SSL_CTX_new).
537          */
538         
539         if (o == NULL) 
540                 {
541                 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
542                 return(0);
543                 }
544         if (*o == NULL)
545                 {
546                 if ((*o = ssl_cert_new()) == NULL)
547                         {
548                         SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
549                         return(0);
550                         }
551                 }
552         return(1);
553         }
554
555 int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
556         {
557         CERT_PKEY *cpk = c->key;
558         if (!cpk)
559                 return 0;
560         if (cpk->chain)
561                 sk_X509_pop_free(cpk->chain, X509_free);
562         cpk->chain = chain;
563         return 1;
564         }
565
566 int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
567         {
568         STACK_OF(X509) *dchain;
569         if (!chain)
570                 return ssl_cert_set0_chain(c, NULL);
571         dchain = X509_chain_up_ref(chain);
572         if (!dchain)
573                 return 0;
574         if (!ssl_cert_set0_chain(c, dchain))
575                 {
576                 sk_X509_pop_free(dchain, X509_free);
577                 return 0;
578                 }
579         return 1;
580         }
581
582 int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
583         {
584         CERT_PKEY *cpk = c->key;
585         if (!cpk)
586                 return 0;
587         if (!cpk->chain)
588                 cpk->chain = sk_X509_new_null();
589         if (!cpk->chain || !sk_X509_push(cpk->chain, x))
590                 return 0;
591         return 1;
592         }
593
594 int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
595         {
596         if (!ssl_cert_add0_chain_cert(c, x))
597                 return 0;
598         CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
599         return 1;
600         }
601
602 int ssl_cert_select_current(CERT *c, X509 *x)
603         {
604         int i;
605         if (x == NULL)
606                 return 0;
607         for (i = 0; i < SSL_PKEY_NUM; i++)
608                 {
609                 if (c->pkeys[i].x509 == x)
610                         {
611                         c->key = &c->pkeys[i];
612                         return 1;
613                         }
614                 }
615
616         for (i = 0; i < SSL_PKEY_NUM; i++)
617                 {
618                 if (c->pkeys[i].x509 && !X509_cmp(c->pkeys[i].x509, x))
619                         {
620                         c->key = &c->pkeys[i];
621                         return 1;
622                         }
623                 }
624         return 0;
625         }
626
627 int ssl_cert_set_current(CERT *c, long op)
628         {
629         int i, idx;
630         if (!c)
631                 return 0;
632         if (op == SSL_CERT_SET_FIRST)
633                 idx = 0;
634         else if (op == SSL_CERT_SET_NEXT)
635                 {
636                 idx = (int)(c->key - c->pkeys + 1);
637                 if (idx >= SSL_PKEY_NUM)
638                         return 0;
639                 }
640         else
641                 return 0;
642         for (i = idx; i < SSL_PKEY_NUM; i++)
643                 {
644                 if (c->pkeys[i].x509)
645                         {
646                         c->key = &c->pkeys[i];
647                         return 1;
648                         }
649                 }
650         return 0;
651         }
652
653 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
654         {
655         c->cert_cb = cb;
656         c->cert_cb_arg = arg;
657         }
658
659 SESS_CERT *ssl_sess_cert_new(void)
660         {
661         SESS_CERT *ret;
662
663         ret = OPENSSL_malloc(sizeof *ret);
664         if (ret == NULL)
665                 {
666                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
667                 return NULL;
668                 }
669
670         memset(ret, 0 ,sizeof *ret);
671         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
672         ret->references = 1;
673
674         return ret;
675         }
676
677 void ssl_sess_cert_free(SESS_CERT *sc)
678         {
679         int i;
680
681         if (sc == NULL)
682                 return;
683
684         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
685 #ifdef REF_PRINT
686         REF_PRINT("SESS_CERT", sc);
687 #endif
688         if (i > 0)
689                 return;
690 #ifdef REF_CHECK
691         if (i < 0)
692                 {
693                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
694                 abort(); /* ok */
695                 }
696 #endif
697
698         /* i == 0 */
699         if (sc->cert_chain != NULL)
700                 sk_X509_pop_free(sc->cert_chain, X509_free);
701         for (i = 0; i < SSL_PKEY_NUM; i++)
702                 {
703                 if (sc->peer_pkeys[i].x509 != NULL)
704                         X509_free(sc->peer_pkeys[i].x509);
705 #if 0 /* We don't have the peer's private key.  These lines are just
706            * here as a reminder that we're still using a not-quite-appropriate
707            * data structure. */
708                 if (sc->peer_pkeys[i].privatekey != NULL)
709                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
710 #endif
711                 }
712
713 #ifndef OPENSSL_NO_RSA
714         if (sc->peer_rsa_tmp != NULL)
715                 RSA_free(sc->peer_rsa_tmp);
716 #endif
717 #ifndef OPENSSL_NO_DH
718         if (sc->peer_dh_tmp != NULL)
719                 DH_free(sc->peer_dh_tmp);
720 #endif
721 #ifndef OPENSSL_NO_ECDH
722         if (sc->peer_ecdh_tmp != NULL)
723                 EC_KEY_free(sc->peer_ecdh_tmp);
724 #endif
725
726         OPENSSL_free(sc);
727         }
728
729 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
730         {
731         sc->peer_cert_type = type;
732         return(1);
733         }
734
735 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
736         {
737         X509 *x;
738         int i;
739         X509_STORE *verify_store;
740         X509_STORE_CTX ctx;
741
742         if (s->cert->verify_store)
743                 verify_store = s->cert->verify_store;
744         else
745                 verify_store = s->ctx->cert_store;
746
747         if ((sk == NULL) || (sk_X509_num(sk) == 0))
748                 return(0);
749
750         x=sk_X509_value(sk,0);
751         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
752                 {
753                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
754                 return(0);
755                 }
756         /* Set suite B flags if needed */
757         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
758 #if 0
759         if (SSL_get_verify_depth(s) >= 0)
760                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
761 #endif
762         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
763
764         /* We need to inherit the verify parameters. These can be determined by
765          * the context: if its a server it will verify SSL client certificates
766          * or vice versa.
767          */
768
769         X509_STORE_CTX_set_default(&ctx,
770                                 s->server ? "ssl_client" : "ssl_server");
771         /* Anything non-default in "param" should overwrite anything in the
772          * ctx.
773          */
774         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
775
776         if (s->verify_callback)
777                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
778
779         if (s->ctx->app_verify_callback != NULL)
780 #if 1 /* new with OpenSSL 0.9.7 */
781                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
782 #else
783                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
784 #endif
785         else
786                 {
787 #ifndef OPENSSL_NO_X509_VERIFY
788                 i=X509_verify_cert(&ctx);
789 #else
790                 i=0;
791                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
792                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
793 #endif
794                 }
795
796         s->verify_result=ctx.error;
797         X509_STORE_CTX_cleanup(&ctx);
798
799         return(i);
800         }
801
802 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
803         {
804         if (*ca_list != NULL)
805                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
806
807         *ca_list=name_list;
808         }
809
810 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
811         {
812         int i;
813         STACK_OF(X509_NAME) *ret;
814         X509_NAME *name;
815
816         ret=sk_X509_NAME_new_null();
817         for (i=0; i<sk_X509_NAME_num(sk); i++)
818                 {
819                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
820                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
821                         {
822                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
823                         return(NULL);
824                         }
825                 }
826         return(ret);
827         }
828
829 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
830         {
831         set_client_CA_list(&(s->client_CA),name_list);
832         }
833
834 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
835         {
836         set_client_CA_list(&(ctx->client_CA),name_list);
837         }
838
839 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
840         {
841         return(ctx->client_CA);
842         }
843
844 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
845         {
846         if (s->type == SSL_ST_CONNECT)
847                 { /* we are in the client */
848                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
849                         (s->s3 != NULL))
850                         return(s->s3->tmp.ca_names);
851                 else
852                         return(NULL);
853                 }
854         else
855                 {
856                 if (s->client_CA != NULL)
857                         return(s->client_CA);
858                 else
859                         return(s->ctx->client_CA);
860                 }
861         }
862
863 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
864         {
865         X509_NAME *name;
866
867         if (x == NULL) return(0);
868         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
869                 return(0);
870                 
871         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
872                 return(0);
873
874         if (!sk_X509_NAME_push(*sk,name))
875                 {
876                 X509_NAME_free(name);
877                 return(0);
878                 }
879         return(1);
880         }
881
882 int SSL_add_client_CA(SSL *ssl,X509 *x)
883         {
884         return(add_client_CA(&(ssl->client_CA),x));
885         }
886
887 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
888         {
889         return(add_client_CA(&(ctx->client_CA),x));
890         }
891
892 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
893         {
894         return(X509_NAME_cmp(*a,*b));
895         }
896
897 #ifndef OPENSSL_NO_STDIO
898 /*!
899  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
900  * it doesn't really have anything to do with clients (except that a common use
901  * for a stack of CAs is to send it to the client). Actually, it doesn't have
902  * much to do with CAs, either, since it will load any old cert.
903  * \param file the file containing one or more certs.
904  * \return a ::STACK containing the certs.
905  */
906 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
907         {
908         BIO *in;
909         X509 *x=NULL;
910         X509_NAME *xn=NULL;
911         STACK_OF(X509_NAME) *ret = NULL,*sk;
912
913         sk=sk_X509_NAME_new(xname_cmp);
914
915         in=BIO_new(BIO_s_file_internal());
916
917         if ((sk == NULL) || (in == NULL))
918                 {
919                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
920                 goto err;
921                 }
922         
923         if (!BIO_read_filename(in,file))
924                 goto err;
925
926         for (;;)
927                 {
928                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
929                         break;
930                 if (ret == NULL)
931                         {
932                         ret = sk_X509_NAME_new_null();
933                         if (ret == NULL)
934                                 {
935                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
936                                 goto err;
937                                 }
938                         }
939                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
940                 /* check for duplicates */
941                 xn=X509_NAME_dup(xn);
942                 if (xn == NULL) goto err;
943                 if (sk_X509_NAME_find(sk,xn) >= 0)
944                         X509_NAME_free(xn);
945                 else
946                         {
947                         sk_X509_NAME_push(sk,xn);
948                         sk_X509_NAME_push(ret,xn);
949                         }
950                 }
951
952         if (0)
953                 {
954 err:
955                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
956                 ret=NULL;
957                 }
958         if (sk != NULL) sk_X509_NAME_free(sk);
959         if (in != NULL) BIO_free(in);
960         if (x != NULL) X509_free(x);
961         if (ret != NULL)
962                 ERR_clear_error();
963         return(ret);
964         }
965 #endif
966
967 /*!
968  * Add a file of certs to a stack.
969  * \param stack the stack to add to.
970  * \param file the file to add from. All certs in this file that are not
971  * already in the stack will be added.
972  * \return 1 for success, 0 for failure. Note that in the case of failure some
973  * certs may have been added to \c stack.
974  */
975
976 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
977                                         const char *file)
978         {
979         BIO *in;
980         X509 *x=NULL;
981         X509_NAME *xn=NULL;
982         int ret=1;
983         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
984         
985         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
986         
987         in=BIO_new(BIO_s_file_internal());
988         
989         if (in == NULL)
990                 {
991                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
992                 goto err;
993                 }
994         
995         if (!BIO_read_filename(in,file))
996                 goto err;
997         
998         for (;;)
999                 {
1000                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
1001                         break;
1002                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
1003                 xn=X509_NAME_dup(xn);
1004                 if (xn == NULL) goto err;
1005                 if (sk_X509_NAME_find(stack,xn) >= 0)
1006                         X509_NAME_free(xn);
1007                 else
1008                         sk_X509_NAME_push(stack,xn);
1009                 }
1010
1011         ERR_clear_error();
1012
1013         if (0)
1014                 {
1015 err:
1016                 ret=0;
1017                 }
1018         if(in != NULL)
1019                 BIO_free(in);
1020         if(x != NULL)
1021                 X509_free(x);
1022         
1023         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
1024
1025         return ret;
1026         }
1027
1028 /*!
1029  * Add a directory of certs to a stack.
1030  * \param stack the stack to append to.
1031  * \param dir the directory to append from. All files in this directory will be
1032  * examined as potential certs. Any that are acceptable to
1033  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1034  * included.
1035  * \return 1 for success, 0 for failure. Note that in the case of failure some
1036  * certs may have been added to \c stack.
1037  */
1038
1039 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1040                                        const char *dir)
1041         {
1042         OPENSSL_DIR_CTX *d = NULL;
1043         const char *filename;
1044         int ret = 0;
1045
1046         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1047
1048         /* Note that a side effect is that the CAs will be sorted by name */
1049
1050         while((filename = OPENSSL_DIR_read(&d, dir)))
1051                 {
1052                 char buf[1024];
1053                 int r;
1054
1055                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1056                         {
1057                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1058                         goto err;
1059                         }
1060
1061 #ifdef OPENSSL_SYS_VMS
1062                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1063 #else
1064                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1065 #endif
1066                 if (r <= 0 || r >= (int)sizeof(buf))
1067                         goto err;
1068                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1069                         goto err;
1070                 }
1071
1072         if (errno)
1073                 {
1074                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1075                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1076                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1077                 goto err;
1078                 }
1079
1080         ret = 1;
1081
1082 err:
1083         if (d) OPENSSL_DIR_end(&d);
1084         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1085         return ret;
1086         }
1087
1088 /* Add a certificate to a BUF_MEM structure */
1089
1090 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1091         {
1092         int n;
1093         unsigned char *p;
1094
1095         n=i2d_X509(x,NULL);
1096         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1097                 {
1098                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1099                 return 0;
1100                 }
1101         p=(unsigned char *)&(buf->data[*l]);
1102         l2n3(n,p);
1103         i2d_X509(x,&p);
1104         *l+=n+3;
1105
1106         return 1;
1107         }
1108
1109 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1110 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1111         {
1112         BUF_MEM *buf = s->init_buf;
1113         int no_chain;
1114         int i;
1115
1116         X509 *x;
1117         STACK_OF(X509) *extra_certs;
1118         X509_STORE *chain_store;
1119
1120         if (cpk)
1121                 x = cpk->x509;
1122         else
1123                 x = NULL;
1124
1125         if (s->cert->chain_store)
1126                 chain_store = s->cert->chain_store;
1127         else
1128                 chain_store = s->ctx->cert_store;
1129
1130         /* If we have a certificate specific chain use it, else use
1131          * parent ctx.
1132          */
1133         if (cpk && cpk->chain)
1134                 extra_certs = cpk->chain;
1135         else
1136                 extra_certs = s->ctx->extra_certs;
1137
1138         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1139                 no_chain = 1;
1140         else
1141                 no_chain = 0;
1142
1143         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1144         if (!BUF_MEM_grow_clean(buf,10))
1145                 {
1146                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1147                 return 0;
1148                 }
1149         if (x != NULL)
1150                 {
1151                 if (no_chain)
1152                         {
1153                         if (!ssl_add_cert_to_buf(buf, l, x))
1154                                 return 0;
1155                         }
1156                 else
1157                         {
1158                         X509_STORE_CTX xs_ctx;
1159
1160                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1161                                 {
1162                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1163                                 return(0);
1164                                 }
1165                         X509_verify_cert(&xs_ctx);
1166                         /* Don't leave errors in the queue */
1167                         ERR_clear_error();
1168                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1169                                 {
1170                                 x = sk_X509_value(xs_ctx.chain, i);
1171
1172                                 if (!ssl_add_cert_to_buf(buf, l, x))
1173                                         {
1174                                         X509_STORE_CTX_cleanup(&xs_ctx);
1175                                         return 0;
1176                                         }
1177                                 }
1178                         X509_STORE_CTX_cleanup(&xs_ctx);
1179                         }
1180                 }
1181         for (i=0; i<sk_X509_num(extra_certs); i++)
1182                 {
1183                 x=sk_X509_value(extra_certs,i);
1184                 if (!ssl_add_cert_to_buf(buf, l, x))
1185                         return 0;
1186                 }
1187
1188         return 1;
1189         }
1190
1191 /* Build a certificate chain for current certificate */
1192 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1193         {
1194         CERT_PKEY *cpk = c->key;
1195         X509_STORE_CTX xs_ctx;
1196         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1197         X509 *x;
1198         int i;
1199
1200         if (!cpk->x509)
1201                 {
1202                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1203                 return 0;
1204                 }
1205
1206         if (c->chain_store)
1207                 chain_store = c->chain_store;
1208
1209         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1210                 untrusted = cpk->chain;
1211
1212         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1213                 {
1214                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1215                 return 0;
1216                 }
1217         /* Set suite B flags if needed */
1218         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1219
1220         i = X509_verify_cert(&xs_ctx);
1221         if (i > 0)
1222                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1223         X509_STORE_CTX_cleanup(&xs_ctx);
1224         if (i <= 0)
1225                 {
1226                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1227                 return 0;
1228                 }
1229         if (cpk->chain)
1230                 sk_X509_pop_free(cpk->chain, X509_free);
1231         /* Remove EE certificate from chain */
1232         x = sk_X509_shift(chain);
1233         X509_free(x);
1234         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1235                 {
1236                 x = sk_X509_pop(chain);
1237                 X509_free(x);
1238                 }
1239         cpk->chain = chain;
1240
1241         return 1;
1242         }
1243
1244 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1245         {
1246         X509_STORE **pstore;
1247         if (chain)
1248                 pstore = &c->chain_store;
1249         else
1250                 pstore = &c->verify_store;
1251         if (*pstore)
1252                 X509_STORE_free(*pstore);
1253         *pstore = store;
1254         if (ref && store)
1255                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1256         return 1;
1257         }
1258