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[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 void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
628         {
629         c->cert_cb = cb;
630         c->cert_cb_arg = arg;
631         }
632
633 SESS_CERT *ssl_sess_cert_new(void)
634         {
635         SESS_CERT *ret;
636
637         ret = OPENSSL_malloc(sizeof *ret);
638         if (ret == NULL)
639                 {
640                 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
641                 return NULL;
642                 }
643
644         memset(ret, 0 ,sizeof *ret);
645         ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
646         ret->references = 1;
647
648         return ret;
649         }
650
651 void ssl_sess_cert_free(SESS_CERT *sc)
652         {
653         int i;
654
655         if (sc == NULL)
656                 return;
657
658         i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
659 #ifdef REF_PRINT
660         REF_PRINT("SESS_CERT", sc);
661 #endif
662         if (i > 0)
663                 return;
664 #ifdef REF_CHECK
665         if (i < 0)
666                 {
667                 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
668                 abort(); /* ok */
669                 }
670 #endif
671
672         /* i == 0 */
673         if (sc->cert_chain != NULL)
674                 sk_X509_pop_free(sc->cert_chain, X509_free);
675         for (i = 0; i < SSL_PKEY_NUM; i++)
676                 {
677                 if (sc->peer_pkeys[i].x509 != NULL)
678                         X509_free(sc->peer_pkeys[i].x509);
679 #if 0 /* We don't have the peer's private key.  These lines are just
680            * here as a reminder that we're still using a not-quite-appropriate
681            * data structure. */
682                 if (sc->peer_pkeys[i].privatekey != NULL)
683                         EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
684 #endif
685                 }
686
687 #ifndef OPENSSL_NO_RSA
688         if (sc->peer_rsa_tmp != NULL)
689                 RSA_free(sc->peer_rsa_tmp);
690 #endif
691 #ifndef OPENSSL_NO_DH
692         if (sc->peer_dh_tmp != NULL)
693                 DH_free(sc->peer_dh_tmp);
694 #endif
695 #ifndef OPENSSL_NO_ECDH
696         if (sc->peer_ecdh_tmp != NULL)
697                 EC_KEY_free(sc->peer_ecdh_tmp);
698 #endif
699
700         OPENSSL_free(sc);
701         }
702
703 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
704         {
705         sc->peer_cert_type = type;
706         return(1);
707         }
708
709 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
710         {
711         X509 *x;
712         int i;
713         X509_STORE *verify_store;
714         X509_STORE_CTX ctx;
715
716         if (s->cert->verify_store)
717                 verify_store = s->cert->verify_store;
718         else
719                 verify_store = s->ctx->cert_store;
720
721         if ((sk == NULL) || (sk_X509_num(sk) == 0))
722                 return(0);
723
724         x=sk_X509_value(sk,0);
725         if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
726                 {
727                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
728                 return(0);
729                 }
730         /* Set suite B flags if needed */
731         X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
732 #if 0
733         if (SSL_get_verify_depth(s) >= 0)
734                 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
735 #endif
736         X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
737
738         /* We need to inherit the verify parameters. These can be determined by
739          * the context: if its a server it will verify SSL client certificates
740          * or vice versa.
741          */
742
743         X509_STORE_CTX_set_default(&ctx,
744                                 s->server ? "ssl_client" : "ssl_server");
745         /* Anything non-default in "param" should overwrite anything in the
746          * ctx.
747          */
748         X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
749
750         if (s->verify_callback)
751                 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
752
753         if (s->ctx->app_verify_callback != NULL)
754 #if 1 /* new with OpenSSL 0.9.7 */
755                 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
756 #else
757                 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
758 #endif
759         else
760                 {
761 #ifndef OPENSSL_NO_X509_VERIFY
762                 i=X509_verify_cert(&ctx);
763 #else
764                 i=0;
765                 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
766                 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
767 #endif
768                 }
769
770         s->verify_result=ctx.error;
771         X509_STORE_CTX_cleanup(&ctx);
772
773         return(i);
774         }
775
776 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
777         {
778         if (*ca_list != NULL)
779                 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
780
781         *ca_list=name_list;
782         }
783
784 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
785         {
786         int i;
787         STACK_OF(X509_NAME) *ret;
788         X509_NAME *name;
789
790         ret=sk_X509_NAME_new_null();
791         for (i=0; i<sk_X509_NAME_num(sk); i++)
792                 {
793                 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
794                 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
795                         {
796                         sk_X509_NAME_pop_free(ret,X509_NAME_free);
797                         return(NULL);
798                         }
799                 }
800         return(ret);
801         }
802
803 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
804         {
805         set_client_CA_list(&(s->client_CA),name_list);
806         }
807
808 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
809         {
810         set_client_CA_list(&(ctx->client_CA),name_list);
811         }
812
813 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
814         {
815         return(ctx->client_CA);
816         }
817
818 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
819         {
820         if (s->type == SSL_ST_CONNECT)
821                 { /* we are in the client */
822                 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
823                         (s->s3 != NULL))
824                         return(s->s3->tmp.ca_names);
825                 else
826                         return(NULL);
827                 }
828         else
829                 {
830                 if (s->client_CA != NULL)
831                         return(s->client_CA);
832                 else
833                         return(s->ctx->client_CA);
834                 }
835         }
836
837 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
838         {
839         X509_NAME *name;
840
841         if (x == NULL) return(0);
842         if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
843                 return(0);
844                 
845         if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
846                 return(0);
847
848         if (!sk_X509_NAME_push(*sk,name))
849                 {
850                 X509_NAME_free(name);
851                 return(0);
852                 }
853         return(1);
854         }
855
856 int SSL_add_client_CA(SSL *ssl,X509 *x)
857         {
858         return(add_client_CA(&(ssl->client_CA),x));
859         }
860
861 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
862         {
863         return(add_client_CA(&(ctx->client_CA),x));
864         }
865
866 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
867         {
868         return(X509_NAME_cmp(*a,*b));
869         }
870
871 #ifndef OPENSSL_NO_STDIO
872 /*!
873  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
874  * it doesn't really have anything to do with clients (except that a common use
875  * for a stack of CAs is to send it to the client). Actually, it doesn't have
876  * much to do with CAs, either, since it will load any old cert.
877  * \param file the file containing one or more certs.
878  * \return a ::STACK containing the certs.
879  */
880 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
881         {
882         BIO *in;
883         X509 *x=NULL;
884         X509_NAME *xn=NULL;
885         STACK_OF(X509_NAME) *ret = NULL,*sk;
886
887         sk=sk_X509_NAME_new(xname_cmp);
888
889         in=BIO_new(BIO_s_file_internal());
890
891         if ((sk == NULL) || (in == NULL))
892                 {
893                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
894                 goto err;
895                 }
896         
897         if (!BIO_read_filename(in,file))
898                 goto err;
899
900         for (;;)
901                 {
902                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
903                         break;
904                 if (ret == NULL)
905                         {
906                         ret = sk_X509_NAME_new_null();
907                         if (ret == NULL)
908                                 {
909                                 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
910                                 goto err;
911                                 }
912                         }
913                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
914                 /* check for duplicates */
915                 xn=X509_NAME_dup(xn);
916                 if (xn == NULL) goto err;
917                 if (sk_X509_NAME_find(sk,xn) >= 0)
918                         X509_NAME_free(xn);
919                 else
920                         {
921                         sk_X509_NAME_push(sk,xn);
922                         sk_X509_NAME_push(ret,xn);
923                         }
924                 }
925
926         if (0)
927                 {
928 err:
929                 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
930                 ret=NULL;
931                 }
932         if (sk != NULL) sk_X509_NAME_free(sk);
933         if (in != NULL) BIO_free(in);
934         if (x != NULL) X509_free(x);
935         if (ret != NULL)
936                 ERR_clear_error();
937         return(ret);
938         }
939 #endif
940
941 /*!
942  * Add a file of certs to a stack.
943  * \param stack the stack to add to.
944  * \param file the file to add from. All certs in this file that are not
945  * already in the stack will be added.
946  * \return 1 for success, 0 for failure. Note that in the case of failure some
947  * certs may have been added to \c stack.
948  */
949
950 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
951                                         const char *file)
952         {
953         BIO *in;
954         X509 *x=NULL;
955         X509_NAME *xn=NULL;
956         int ret=1;
957         int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
958         
959         oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
960         
961         in=BIO_new(BIO_s_file_internal());
962         
963         if (in == NULL)
964                 {
965                 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
966                 goto err;
967                 }
968         
969         if (!BIO_read_filename(in,file))
970                 goto err;
971         
972         for (;;)
973                 {
974                 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
975                         break;
976                 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
977                 xn=X509_NAME_dup(xn);
978                 if (xn == NULL) goto err;
979                 if (sk_X509_NAME_find(stack,xn) >= 0)
980                         X509_NAME_free(xn);
981                 else
982                         sk_X509_NAME_push(stack,xn);
983                 }
984
985         ERR_clear_error();
986
987         if (0)
988                 {
989 err:
990                 ret=0;
991                 }
992         if(in != NULL)
993                 BIO_free(in);
994         if(x != NULL)
995                 X509_free(x);
996         
997         (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
998
999         return ret;
1000         }
1001
1002 /*!
1003  * Add a directory of certs to a stack.
1004  * \param stack the stack to append to.
1005  * \param dir the directory to append from. All files in this directory will be
1006  * examined as potential certs. Any that are acceptable to
1007  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
1008  * included.
1009  * \return 1 for success, 0 for failure. Note that in the case of failure some
1010  * certs may have been added to \c stack.
1011  */
1012
1013 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
1014                                        const char *dir)
1015         {
1016         OPENSSL_DIR_CTX *d = NULL;
1017         const char *filename;
1018         int ret = 0;
1019
1020         CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
1021
1022         /* Note that a side effect is that the CAs will be sorted by name */
1023
1024         while((filename = OPENSSL_DIR_read(&d, dir)))
1025                 {
1026                 char buf[1024];
1027                 int r;
1028
1029                 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
1030                         {
1031                         SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
1032                         goto err;
1033                         }
1034
1035 #ifdef OPENSSL_SYS_VMS
1036                 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
1037 #else
1038                 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
1039 #endif
1040                 if (r <= 0 || r >= (int)sizeof(buf))
1041                         goto err;
1042                 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
1043                         goto err;
1044                 }
1045
1046         if (errno)
1047                 {
1048                 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
1049                 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
1050                 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
1051                 goto err;
1052                 }
1053
1054         ret = 1;
1055
1056 err:
1057         if (d) OPENSSL_DIR_end(&d);
1058         CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
1059         return ret;
1060         }
1061
1062 /* Add a certificate to a BUF_MEM structure */
1063
1064 static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
1065         {
1066         int n;
1067         unsigned char *p;
1068
1069         n=i2d_X509(x,NULL);
1070         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
1071                 {
1072                 SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
1073                 return 0;
1074                 }
1075         p=(unsigned char *)&(buf->data[*l]);
1076         l2n3(n,p);
1077         i2d_X509(x,&p);
1078         *l+=n+3;
1079
1080         return 1;
1081         }
1082
1083 /* Add certificate chain to internal SSL BUF_MEM strcuture */
1084 int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
1085         {
1086         BUF_MEM *buf = s->init_buf;
1087         int no_chain;
1088         int i;
1089
1090         X509 *x;
1091         STACK_OF(X509) *extra_certs;
1092         X509_STORE *chain_store;
1093
1094         if (cpk)
1095                 x = cpk->x509;
1096         else
1097                 x = NULL;
1098
1099         if (s->cert->chain_store)
1100                 chain_store = s->cert->chain_store;
1101         else
1102                 chain_store = s->ctx->cert_store;
1103
1104         /* If we have a certificate specific chain use it, else use
1105          * parent ctx.
1106          */
1107         if (cpk && cpk->chain)
1108                 extra_certs = cpk->chain;
1109         else
1110                 extra_certs = s->ctx->extra_certs;
1111
1112         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
1113                 no_chain = 1;
1114         else
1115                 no_chain = 0;
1116
1117         /* TLSv1 sends a chain with nothing in it, instead of an alert */
1118         if (!BUF_MEM_grow_clean(buf,10))
1119                 {
1120                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
1121                 return 0;
1122                 }
1123         if (x != NULL)
1124                 {
1125                 if (no_chain)
1126                         {
1127                         if (!ssl_add_cert_to_buf(buf, l, x))
1128                                 return 0;
1129                         }
1130                 else
1131                         {
1132                         X509_STORE_CTX xs_ctx;
1133
1134                         if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
1135                                 {
1136                                 SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
1137                                 return(0);
1138                                 }
1139                         X509_verify_cert(&xs_ctx);
1140                         /* Don't leave errors in the queue */
1141                         ERR_clear_error();
1142                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
1143                                 {
1144                                 x = sk_X509_value(xs_ctx.chain, i);
1145
1146                                 if (!ssl_add_cert_to_buf(buf, l, x))
1147                                         {
1148                                         X509_STORE_CTX_cleanup(&xs_ctx);
1149                                         return 0;
1150                                         }
1151                                 }
1152                         X509_STORE_CTX_cleanup(&xs_ctx);
1153                         }
1154                 }
1155         for (i=0; i<sk_X509_num(extra_certs); i++)
1156                 {
1157                 x=sk_X509_value(extra_certs,i);
1158                 if (!ssl_add_cert_to_buf(buf, l, x))
1159                         return 0;
1160                 }
1161
1162         return 1;
1163         }
1164
1165 /* Build a certificate chain for current certificate */
1166 int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
1167         {
1168         CERT_PKEY *cpk = c->key;
1169         X509_STORE_CTX xs_ctx;
1170         STACK_OF(X509) *chain = NULL, *untrusted = NULL;
1171         X509 *x;
1172         int i;
1173
1174         if (!cpk->x509)
1175                 {
1176                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
1177                 return 0;
1178                 }
1179
1180         if (c->chain_store)
1181                 chain_store = c->chain_store;
1182
1183         if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
1184                 untrusted = cpk->chain;
1185
1186         if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
1187                 {
1188                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
1189                 return 0;
1190                 }
1191         /* Set suite B flags if needed */
1192         X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
1193
1194         i = X509_verify_cert(&xs_ctx);
1195         if (i > 0)
1196                 chain = X509_STORE_CTX_get1_chain(&xs_ctx);
1197         X509_STORE_CTX_cleanup(&xs_ctx);
1198         if (i <= 0)
1199                 {
1200                 SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
1201                 return 0;
1202                 }
1203         if (cpk->chain)
1204                 sk_X509_pop_free(cpk->chain, X509_free);
1205         /* Remove EE certificate from chain */
1206         x = sk_X509_shift(chain);
1207         X509_free(x);
1208         if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
1209                 {
1210                 x = sk_X509_pop(chain);
1211                 X509_free(x);
1212                 }
1213         cpk->chain = chain;
1214
1215         return 1;
1216         }
1217
1218 int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
1219         {
1220         X509_STORE **pstore;
1221         if (chain)
1222                 pstore = &c->chain_store;
1223         else
1224                 pstore = &c->verify_store;
1225         if (*pstore)
1226                 X509_STORE_free(*pstore);
1227         *pstore = store;
1228         if (ref && store)
1229                 CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
1230         return 1;
1231         }
1232