xref: /freebsd/crypto/openssl/ssl/ssl_cert.c (revision e4e9813eb92cd7c4d4b819a8fbed5cbd3d92f5d8)
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) 1999 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 /* ====================================================================
107  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
108  * ECC cipher suite support in OpenSSL originally developed by
109  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
110  */
111 
112 #include <stdio.h>
113 
114 #include "e_os.h"
115 #ifndef NO_SYS_TYPES_H
116 # include <sys/types.h>
117 #endif
118 
119 #include "o_dir.h"
120 #include <openssl/objects.h>
121 #include <openssl/bio.h>
122 #include <openssl/pem.h>
123 #include <openssl/x509v3.h>
124 #ifndef OPENSSL_NO_DH
125 #include <openssl/dh.h>
126 #endif
127 #include <openssl/bn.h>
128 #include "ssl_locl.h"
129 
130 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
131 	{
132 	static volatile int ssl_x509_store_ctx_idx= -1;
133 
134 	if (ssl_x509_store_ctx_idx < 0)
135 		{
136 		/* any write lock will do; usually this branch
137 		 * will only be taken once anyway */
138 		CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
139 
140 		if (ssl_x509_store_ctx_idx < 0)
141 			{
142 			ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
143 				0,"SSL for verify callback",NULL,NULL,NULL);
144 			}
145 
146 		CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
147 		}
148 	return ssl_x509_store_ctx_idx;
149 	}
150 
151 CERT *ssl_cert_new(void)
152 	{
153 	CERT *ret;
154 
155 	ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
156 	if (ret == NULL)
157 		{
158 		SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
159 		return(NULL);
160 		}
161 	memset(ret,0,sizeof(CERT));
162 
163 	ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
164 	ret->references=1;
165 
166 	return(ret);
167 	}
168 
169 CERT *ssl_cert_dup(CERT *cert)
170 	{
171 	CERT *ret;
172 	int i;
173 
174 	ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
175 	if (ret == NULL)
176 		{
177 		SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
178 		return(NULL);
179 		}
180 
181 	memset(ret, 0, sizeof(CERT));
182 
183 	ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
184 	/* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
185 	 * if you find that more readable */
186 
187 	ret->valid = cert->valid;
188 	ret->mask = cert->mask;
189 	ret->export_mask = cert->export_mask;
190 
191 #ifndef OPENSSL_NO_RSA
192 	if (cert->rsa_tmp != NULL)
193 		{
194 		RSA_up_ref(cert->rsa_tmp);
195 		ret->rsa_tmp = cert->rsa_tmp;
196 		}
197 	ret->rsa_tmp_cb = cert->rsa_tmp_cb;
198 #endif
199 
200 #ifndef OPENSSL_NO_DH
201 	if (cert->dh_tmp != NULL)
202 		{
203 		ret->dh_tmp = DHparams_dup(cert->dh_tmp);
204 		if (ret->dh_tmp == NULL)
205 			{
206 			SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
207 			goto err;
208 			}
209 		if (cert->dh_tmp->priv_key)
210 			{
211 			BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
212 			if (!b)
213 				{
214 				SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
215 				goto err;
216 				}
217 			ret->dh_tmp->priv_key = b;
218 			}
219 		if (cert->dh_tmp->pub_key)
220 			{
221 			BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
222 			if (!b)
223 				{
224 				SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
225 				goto err;
226 				}
227 			ret->dh_tmp->pub_key = b;
228 			}
229 		}
230 	ret->dh_tmp_cb = cert->dh_tmp_cb;
231 #endif
232 
233 #ifndef OPENSSL_NO_ECDH
234 	if (cert->ecdh_tmp)
235 		{
236 		ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
237 		if (ret->ecdh_tmp == NULL)
238 			{
239 			SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
240 			goto err;
241 			}
242 		}
243 	ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
244 #endif
245 
246 	for (i = 0; i < SSL_PKEY_NUM; i++)
247 		{
248 		if (cert->pkeys[i].x509 != NULL)
249 			{
250 			ret->pkeys[i].x509 = cert->pkeys[i].x509;
251 			CRYPTO_add(&ret->pkeys[i].x509->references, 1,
252 				CRYPTO_LOCK_X509);
253 			}
254 
255 		if (cert->pkeys[i].privatekey != NULL)
256 			{
257 			ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
258 			CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
259 				CRYPTO_LOCK_EVP_PKEY);
260 
261 			switch(i)
262 				{
263 				/* If there was anything special to do for
264 				 * certain types of keys, we'd do it here.
265 				 * (Nothing at the moment, I think.) */
266 
267 			case SSL_PKEY_RSA_ENC:
268 			case SSL_PKEY_RSA_SIGN:
269 				/* We have an RSA key. */
270 				break;
271 
272 			case SSL_PKEY_DSA_SIGN:
273 				/* We have a DSA key. */
274 				break;
275 
276 			case SSL_PKEY_DH_RSA:
277 			case SSL_PKEY_DH_DSA:
278 				/* We have a DH key. */
279 				break;
280 
281 			case SSL_PKEY_ECC:
282 				/* We have an ECC key */
283 				break;
284 
285 			default:
286 				/* Can't happen. */
287 				SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
288 				}
289 			}
290 		}
291 
292 	/* ret->extra_certs *should* exist, but currently the own certificate
293 	 * chain is held inside SSL_CTX */
294 
295 	ret->references=1;
296 
297 	return(ret);
298 
299 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
300 err:
301 #endif
302 #ifndef OPENSSL_NO_RSA
303 	if (ret->rsa_tmp != NULL)
304 		RSA_free(ret->rsa_tmp);
305 #endif
306 #ifndef OPENSSL_NO_DH
307 	if (ret->dh_tmp != NULL)
308 		DH_free(ret->dh_tmp);
309 #endif
310 #ifndef OPENSSL_NO_ECDH
311 	if (ret->ecdh_tmp != NULL)
312 		EC_KEY_free(ret->ecdh_tmp);
313 #endif
314 
315 	for (i = 0; i < SSL_PKEY_NUM; i++)
316 		{
317 		if (ret->pkeys[i].x509 != NULL)
318 			X509_free(ret->pkeys[i].x509);
319 		if (ret->pkeys[i].privatekey != NULL)
320 			EVP_PKEY_free(ret->pkeys[i].privatekey);
321 		}
322 
323 	return NULL;
324 	}
325 
326 
327 void ssl_cert_free(CERT *c)
328 	{
329 	int i;
330 
331 	if(c == NULL)
332 	    return;
333 
334 	i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
335 #ifdef REF_PRINT
336 	REF_PRINT("CERT",c);
337 #endif
338 	if (i > 0) return;
339 #ifdef REF_CHECK
340 	if (i < 0)
341 		{
342 		fprintf(stderr,"ssl_cert_free, bad reference count\n");
343 		abort(); /* ok */
344 		}
345 #endif
346 
347 #ifndef OPENSSL_NO_RSA
348 	if (c->rsa_tmp) RSA_free(c->rsa_tmp);
349 #endif
350 #ifndef OPENSSL_NO_DH
351 	if (c->dh_tmp) DH_free(c->dh_tmp);
352 #endif
353 #ifndef OPENSSL_NO_ECDH
354 	if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
355 #endif
356 
357 	for (i=0; i<SSL_PKEY_NUM; i++)
358 		{
359 		if (c->pkeys[i].x509 != NULL)
360 			X509_free(c->pkeys[i].x509);
361 		if (c->pkeys[i].privatekey != NULL)
362 			EVP_PKEY_free(c->pkeys[i].privatekey);
363 #if 0
364 		if (c->pkeys[i].publickey != NULL)
365 			EVP_PKEY_free(c->pkeys[i].publickey);
366 #endif
367 		}
368 	OPENSSL_free(c);
369 	}
370 
371 int ssl_cert_inst(CERT **o)
372 	{
373 	/* Create a CERT if there isn't already one
374 	 * (which cannot really happen, as it is initially created in
375 	 * SSL_CTX_new; but the earlier code usually allows for that one
376 	 * being non-existant, so we follow that behaviour, as it might
377 	 * turn out that there actually is a reason for it -- but I'm
378 	 * not sure that *all* of the existing code could cope with
379 	 * s->cert being NULL, otherwise we could do without the
380 	 * initialization in SSL_CTX_new).
381 	 */
382 
383 	if (o == NULL)
384 		{
385 		SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
386 		return(0);
387 		}
388 	if (*o == NULL)
389 		{
390 		if ((*o = ssl_cert_new()) == NULL)
391 			{
392 			SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
393 			return(0);
394 			}
395 		}
396 	return(1);
397 	}
398 
399 
400 SESS_CERT *ssl_sess_cert_new(void)
401 	{
402 	SESS_CERT *ret;
403 
404 	ret = OPENSSL_malloc(sizeof *ret);
405 	if (ret == NULL)
406 		{
407 		SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
408 		return NULL;
409 		}
410 
411 	memset(ret, 0 ,sizeof *ret);
412 	ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
413 	ret->references = 1;
414 
415 	return ret;
416 	}
417 
418 void ssl_sess_cert_free(SESS_CERT *sc)
419 	{
420 	int i;
421 
422 	if (sc == NULL)
423 		return;
424 
425 	i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
426 #ifdef REF_PRINT
427 	REF_PRINT("SESS_CERT", sc);
428 #endif
429 	if (i > 0)
430 		return;
431 #ifdef REF_CHECK
432 	if (i < 0)
433 		{
434 		fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
435 		abort(); /* ok */
436 		}
437 #endif
438 
439 	/* i == 0 */
440 	if (sc->cert_chain != NULL)
441 		sk_X509_pop_free(sc->cert_chain, X509_free);
442 	for (i = 0; i < SSL_PKEY_NUM; i++)
443 		{
444 		if (sc->peer_pkeys[i].x509 != NULL)
445 			X509_free(sc->peer_pkeys[i].x509);
446 #if 0 /* We don't have the peer's private key.  These lines are just
447 	   * here as a reminder that we're still using a not-quite-appropriate
448 	   * data structure. */
449 		if (sc->peer_pkeys[i].privatekey != NULL)
450 			EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
451 #endif
452 		}
453 
454 #ifndef OPENSSL_NO_RSA
455 	if (sc->peer_rsa_tmp != NULL)
456 		RSA_free(sc->peer_rsa_tmp);
457 #endif
458 #ifndef OPENSSL_NO_DH
459 	if (sc->peer_dh_tmp != NULL)
460 		DH_free(sc->peer_dh_tmp);
461 #endif
462 #ifndef OPENSSL_NO_ECDH
463 	if (sc->peer_ecdh_tmp != NULL)
464 		EC_KEY_free(sc->peer_ecdh_tmp);
465 #endif
466 
467 	OPENSSL_free(sc);
468 	}
469 
470 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
471 	{
472 	sc->peer_cert_type = type;
473 	return(1);
474 	}
475 
476 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
477 	{
478 	X509 *x;
479 	int i;
480 	X509_STORE_CTX ctx;
481 
482 	if ((sk == NULL) || (sk_X509_num(sk) == 0))
483 		return(0);
484 
485 	x=sk_X509_value(sk,0);
486 	if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
487 		{
488 		SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
489 		return(0);
490 		}
491 	if (s->param)
492 		X509_VERIFY_PARAM_inherit(X509_STORE_CTX_get0_param(&ctx),
493 						s->param);
494 #if 0
495 	if (SSL_get_verify_depth(s) >= 0)
496 		X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
497 #endif
498 	X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
499 
500 	/* We need to inherit the verify parameters. These can be determined by
501 	 * the context: if its a server it will verify SSL client certificates
502 	 * or vice versa.
503 	 */
504 
505 	X509_STORE_CTX_set_default(&ctx,
506 				s->server ? "ssl_client" : "ssl_server");
507 
508 	if (s->verify_callback)
509 		X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
510 
511 	if (s->ctx->app_verify_callback != NULL)
512 #if 1 /* new with OpenSSL 0.9.7 */
513 		i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
514 #else
515 		i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
516 #endif
517 	else
518 		{
519 #ifndef OPENSSL_NO_X509_VERIFY
520 		i=X509_verify_cert(&ctx);
521 #else
522 		i=0;
523 		ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
524 		SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
525 #endif
526 		}
527 
528 	s->verify_result=ctx.error;
529 	X509_STORE_CTX_cleanup(&ctx);
530 
531 	return(i);
532 	}
533 
534 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
535 	{
536 	if (*ca_list != NULL)
537 		sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
538 
539 	*ca_list=name_list;
540 	}
541 
542 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
543 	{
544 	int i;
545 	STACK_OF(X509_NAME) *ret;
546 	X509_NAME *name;
547 
548 	ret=sk_X509_NAME_new_null();
549 	for (i=0; i<sk_X509_NAME_num(sk); i++)
550 		{
551 		name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
552 		if ((name == NULL) || !sk_X509_NAME_push(ret,name))
553 			{
554 			sk_X509_NAME_pop_free(ret,X509_NAME_free);
555 			return(NULL);
556 			}
557 		}
558 	return(ret);
559 	}
560 
561 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
562 	{
563 	set_client_CA_list(&(s->client_CA),name_list);
564 	}
565 
566 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
567 	{
568 	set_client_CA_list(&(ctx->client_CA),name_list);
569 	}
570 
571 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
572 	{
573 	return(ctx->client_CA);
574 	}
575 
576 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
577 	{
578 	if (s->type == SSL_ST_CONNECT)
579 		{ /* we are in the client */
580 		if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
581 			(s->s3 != NULL))
582 			return(s->s3->tmp.ca_names);
583 		else
584 			return(NULL);
585 		}
586 	else
587 		{
588 		if (s->client_CA != NULL)
589 			return(s->client_CA);
590 		else
591 			return(s->ctx->client_CA);
592 		}
593 	}
594 
595 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
596 	{
597 	X509_NAME *name;
598 
599 	if (x == NULL) return(0);
600 	if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
601 		return(0);
602 
603 	if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
604 		return(0);
605 
606 	if (!sk_X509_NAME_push(*sk,name))
607 		{
608 		X509_NAME_free(name);
609 		return(0);
610 		}
611 	return(1);
612 	}
613 
614 int SSL_add_client_CA(SSL *ssl,X509 *x)
615 	{
616 	return(add_client_CA(&(ssl->client_CA),x));
617 	}
618 
619 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
620 	{
621 	return(add_client_CA(&(ctx->client_CA),x));
622 	}
623 
624 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
625 	{
626 	return(X509_NAME_cmp(*a,*b));
627 	}
628 
629 #ifndef OPENSSL_NO_STDIO
630 /*!
631  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
632  * it doesn't really have anything to do with clients (except that a common use
633  * for a stack of CAs is to send it to the client). Actually, it doesn't have
634  * much to do with CAs, either, since it will load any old cert.
635  * \param file the file containing one or more certs.
636  * \return a ::STACK containing the certs.
637  */
638 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
639 	{
640 	BIO *in;
641 	X509 *x=NULL;
642 	X509_NAME *xn=NULL;
643 	STACK_OF(X509_NAME) *ret = NULL,*sk;
644 
645 	sk=sk_X509_NAME_new(xname_cmp);
646 
647 	in=BIO_new(BIO_s_file_internal());
648 
649 	if ((sk == NULL) || (in == NULL))
650 		{
651 		SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
652 		goto err;
653 		}
654 
655 	if (!BIO_read_filename(in,file))
656 		goto err;
657 
658 	for (;;)
659 		{
660 		if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
661 			break;
662 		if (ret == NULL)
663 			{
664 			ret = sk_X509_NAME_new_null();
665 			if (ret == NULL)
666 				{
667 				SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
668 				goto err;
669 				}
670 			}
671 		if ((xn=X509_get_subject_name(x)) == NULL) goto err;
672 		/* check for duplicates */
673 		xn=X509_NAME_dup(xn);
674 		if (xn == NULL) goto err;
675 		if (sk_X509_NAME_find(sk,xn) >= 0)
676 			X509_NAME_free(xn);
677 		else
678 			{
679 			sk_X509_NAME_push(sk,xn);
680 			sk_X509_NAME_push(ret,xn);
681 			}
682 		}
683 
684 	if (0)
685 		{
686 err:
687 		if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
688 		ret=NULL;
689 		}
690 	if (sk != NULL) sk_X509_NAME_free(sk);
691 	if (in != NULL) BIO_free(in);
692 	if (x != NULL) X509_free(x);
693 	if (ret != NULL)
694 		ERR_clear_error();
695 	return(ret);
696 	}
697 #endif
698 
699 /*!
700  * Add a file of certs to a stack.
701  * \param stack the stack to add to.
702  * \param file the file to add from. All certs in this file that are not
703  * already in the stack will be added.
704  * \return 1 for success, 0 for failure. Note that in the case of failure some
705  * certs may have been added to \c stack.
706  */
707 
708 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
709 					const char *file)
710 	{
711 	BIO *in;
712 	X509 *x=NULL;
713 	X509_NAME *xn=NULL;
714 	int ret=1;
715 	int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
716 
717 	oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
718 
719 	in=BIO_new(BIO_s_file_internal());
720 
721 	if (in == NULL)
722 		{
723 		SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
724 		goto err;
725 		}
726 
727 	if (!BIO_read_filename(in,file))
728 		goto err;
729 
730 	for (;;)
731 		{
732 		if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
733 			break;
734 		if ((xn=X509_get_subject_name(x)) == NULL) goto err;
735 		xn=X509_NAME_dup(xn);
736 		if (xn == NULL) goto err;
737 		if (sk_X509_NAME_find(stack,xn) >= 0)
738 			X509_NAME_free(xn);
739 		else
740 			sk_X509_NAME_push(stack,xn);
741 		}
742 
743 	if (0)
744 		{
745 err:
746 		ret=0;
747 		}
748 	if(in != NULL)
749 		BIO_free(in);
750 	if(x != NULL)
751 		X509_free(x);
752 
753 	sk_X509_NAME_set_cmp_func(stack,oldcmp);
754 
755 	return ret;
756 	}
757 
758 /*!
759  * Add a directory of certs to a stack.
760  * \param stack the stack to append to.
761  * \param dir the directory to append from. All files in this directory will be
762  * examined as potential certs. Any that are acceptable to
763  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
764  * included.
765  * \return 1 for success, 0 for failure. Note that in the case of failure some
766  * certs may have been added to \c stack.
767  */
768 
769 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
770 				       const char *dir)
771 	{
772 	OPENSSL_DIR_CTX *d = NULL;
773 	const char *filename;
774 	int ret = 0;
775 
776 	CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
777 
778 	/* Note that a side effect is that the CAs will be sorted by name */
779 
780 	while((filename = OPENSSL_DIR_read(&d, dir)))
781 		{
782 		char buf[1024];
783 		int r;
784 
785 		if(strlen(dir)+strlen(filename)+2 > sizeof buf)
786 			{
787 			SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
788 			goto err;
789 			}
790 
791 #ifdef OPENSSL_SYS_VMS
792 		r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
793 #else
794 		r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
795 #endif
796 		if (r <= 0 || r >= (int)sizeof(buf))
797 			goto err;
798 		if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
799 			goto err;
800 		}
801 
802 	if (errno)
803 		{
804 		SYSerr(SYS_F_OPENDIR, get_last_sys_error());
805 		ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
806 		SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
807 		goto err;
808 		}
809 
810 	ret = 1;
811 
812 err:
813 	if (d) OPENSSL_DIR_end(&d);
814 	CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
815 	return ret;
816 	}
817 
818