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      1 /*! \file ssl/ssl_cert.c */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 (at) 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 (at) cryptsoft.com).  This product includes software written by Tim
    108  * Hudson (tjh (at) cryptsoft.com).
    109  *
    110  */
    111 /* ====================================================================
    112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
    113  * ECC cipher suite support in OpenSSL originally developed by
    114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
    115  */
    116 
    117 #include <stdio.h>
    118 
    119 #include "e_os.h"
    120 #ifndef NO_SYS_TYPES_H
    121 # include <sys/types.h>
    122 #endif
    123 
    124 #include "o_dir.h"
    125 #include <openssl/objects.h>
    126 #include <openssl/bio.h>
    127 #include <openssl/pem.h>
    128 #include <openssl/x509v3.h>
    129 #ifndef OPENSSL_NO_DH
    130 #include <openssl/dh.h>
    131 #endif
    132 #include <openssl/bn.h>
    133 #include "ssl_locl.h"
    134 
    135 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
    136 	{
    137 	static volatile int ssl_x509_store_ctx_idx= -1;
    138 	int got_write_lock = 0;
    139 
    140 	CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
    141 
    142 	if (ssl_x509_store_ctx_idx < 0)
    143 		{
    144 		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
    145 		CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
    146 		got_write_lock = 1;
    147 
    148 		if (ssl_x509_store_ctx_idx < 0)
    149 			{
    150 			ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
    151 				0,"SSL for verify callback",NULL,NULL,NULL);
    152 			}
    153 		}
    154 
    155 	if (got_write_lock)
    156 		CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
    157 	else
    158 		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
    159 
    160 	return ssl_x509_store_ctx_idx;
    161 	}
    162 
    163 static void ssl_cert_set_default_md(CERT *cert)
    164 	{
    165 	/* Set digest values to defaults */
    166 #ifndef OPENSSL_NO_DSA
    167 	cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_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 #endif
    274 
    275 	for (i = 0; i < SSL_PKEY_NUM; i++)
    276 		{
    277 		if (cert->pkeys[i].x509 != NULL)
    278 			{
    279 			ret->pkeys[i].x509 = cert->pkeys[i].x509;
    280 			CRYPTO_add(&ret->pkeys[i].x509->references, 1,
    281 				CRYPTO_LOCK_X509);
    282 			}
    283 
    284 		if (cert->pkeys[i].privatekey != NULL)
    285 			{
    286 			ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
    287 			CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
    288 				CRYPTO_LOCK_EVP_PKEY);
    289 
    290 			switch(i)
    291 				{
    292 				/* If there was anything special to do for
    293 				 * certain types of keys, we'd do it here.
    294 				 * (Nothing at the moment, I think.) */
    295 
    296 			case SSL_PKEY_RSA_ENC:
    297 			case SSL_PKEY_RSA_SIGN:
    298 				/* We have an RSA key. */
    299 				break;
    300 
    301 			case SSL_PKEY_DSA_SIGN:
    302 				/* We have a DSA key. */
    303 				break;
    304 
    305 			case SSL_PKEY_DH_RSA:
    306 			case SSL_PKEY_DH_DSA:
    307 				/* We have a DH key. */
    308 				break;
    309 
    310 			case SSL_PKEY_ECC:
    311 				/* We have an ECC key */
    312 				break;
    313 
    314 			default:
    315 				/* Can't happen. */
    316 				SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
    317 				}
    318 			}
    319 		}
    320 
    321 	/* ret->extra_certs *should* exist, but currently the own certificate
    322 	 * chain is held inside SSL_CTX */
    323 
    324 	ret->references=1;
    325 	/* Set digests to defaults. NB: we don't copy existing values as they
    326 	 * will be set during handshake.
    327 	 */
    328 	ssl_cert_set_default_md(ret);
    329 
    330 	return(ret);
    331 
    332 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
    333 err:
    334 #endif
    335 #ifndef OPENSSL_NO_RSA
    336 	if (ret->rsa_tmp != NULL)
    337 		RSA_free(ret->rsa_tmp);
    338 #endif
    339 #ifndef OPENSSL_NO_DH
    340 	if (ret->dh_tmp != NULL)
    341 		DH_free(ret->dh_tmp);
    342 #endif
    343 #ifndef OPENSSL_NO_ECDH
    344 	if (ret->ecdh_tmp != NULL)
    345 		EC_KEY_free(ret->ecdh_tmp);
    346 #endif
    347 
    348 	for (i = 0; i < SSL_PKEY_NUM; i++)
    349 		{
    350 		if (ret->pkeys[i].x509 != NULL)
    351 			X509_free(ret->pkeys[i].x509);
    352 		if (ret->pkeys[i].privatekey != NULL)
    353 			EVP_PKEY_free(ret->pkeys[i].privatekey);
    354 		}
    355 
    356 	return NULL;
    357 	}
    358 
    359 
    360 void ssl_cert_free(CERT *c)
    361 	{
    362 	int i;
    363 
    364 	if(c == NULL)
    365 	    return;
    366 
    367 	i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
    368 #ifdef REF_PRINT
    369 	REF_PRINT("CERT",c);
    370 #endif
    371 	if (i > 0) return;
    372 #ifdef REF_CHECK
    373 	if (i < 0)
    374 		{
    375 		fprintf(stderr,"ssl_cert_free, bad reference count\n");
    376 		abort(); /* ok */
    377 		}
    378 #endif
    379 
    380 #ifndef OPENSSL_NO_RSA
    381 	if (c->rsa_tmp) RSA_free(c->rsa_tmp);
    382 #endif
    383 #ifndef OPENSSL_NO_DH
    384 	if (c->dh_tmp) DH_free(c->dh_tmp);
    385 #endif
    386 #ifndef OPENSSL_NO_ECDH
    387 	if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
    388 #endif
    389 
    390 	for (i=0; i<SSL_PKEY_NUM; i++)
    391 		{
    392 		if (c->pkeys[i].x509 != NULL)
    393 			X509_free(c->pkeys[i].x509);
    394 		if (c->pkeys[i].privatekey != NULL)
    395 			EVP_PKEY_free(c->pkeys[i].privatekey);
    396 #if 0
    397 		if (c->pkeys[i].publickey != NULL)
    398 			EVP_PKEY_free(c->pkeys[i].publickey);
    399 #endif
    400 		}
    401 	OPENSSL_free(c);
    402 	}
    403 
    404 int ssl_cert_inst(CERT **o)
    405 	{
    406 	/* Create a CERT if there isn't already one
    407 	 * (which cannot really happen, as it is initially created in
    408 	 * SSL_CTX_new; but the earlier code usually allows for that one
    409 	 * being non-existant, so we follow that behaviour, as it might
    410 	 * turn out that there actually is a reason for it -- but I'm
    411 	 * not sure that *all* of the existing code could cope with
    412 	 * s->cert being NULL, otherwise we could do without the
    413 	 * initialization in SSL_CTX_new).
    414 	 */
    415 
    416 	if (o == NULL)
    417 		{
    418 		SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
    419 		return(0);
    420 		}
    421 	if (*o == NULL)
    422 		{
    423 		if ((*o = ssl_cert_new()) == NULL)
    424 			{
    425 			SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
    426 			return(0);
    427 			}
    428 		}
    429 	return(1);
    430 	}
    431 
    432 
    433 SESS_CERT *ssl_sess_cert_new(void)
    434 	{
    435 	SESS_CERT *ret;
    436 
    437 	ret = OPENSSL_malloc(sizeof *ret);
    438 	if (ret == NULL)
    439 		{
    440 		SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
    441 		return NULL;
    442 		}
    443 
    444 	memset(ret, 0 ,sizeof *ret);
    445 	ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
    446 	ret->references = 1;
    447 
    448 	return ret;
    449 	}
    450 
    451 void ssl_sess_cert_free(SESS_CERT *sc)
    452 	{
    453 	int i;
    454 
    455 	if (sc == NULL)
    456 		return;
    457 
    458 	i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
    459 #ifdef REF_PRINT
    460 	REF_PRINT("SESS_CERT", sc);
    461 #endif
    462 	if (i > 0)
    463 		return;
    464 #ifdef REF_CHECK
    465 	if (i < 0)
    466 		{
    467 		fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
    468 		abort(); /* ok */
    469 		}
    470 #endif
    471 
    472 	/* i == 0 */
    473 	if (sc->cert_chain != NULL)
    474 		sk_X509_pop_free(sc->cert_chain, X509_free);
    475 	for (i = 0; i < SSL_PKEY_NUM; i++)
    476 		{
    477 		if (sc->peer_pkeys[i].x509 != NULL)
    478 			X509_free(sc->peer_pkeys[i].x509);
    479 #if 0 /* We don't have the peer's private key.  These lines are just
    480 	   * here as a reminder that we're still using a not-quite-appropriate
    481 	   * data structure. */
    482 		if (sc->peer_pkeys[i].privatekey != NULL)
    483 			EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
    484 #endif
    485 		}
    486 
    487 #ifndef OPENSSL_NO_RSA
    488 	if (sc->peer_rsa_tmp != NULL)
    489 		RSA_free(sc->peer_rsa_tmp);
    490 #endif
    491 #ifndef OPENSSL_NO_DH
    492 	if (sc->peer_dh_tmp != NULL)
    493 		DH_free(sc->peer_dh_tmp);
    494 #endif
    495 #ifndef OPENSSL_NO_ECDH
    496 	if (sc->peer_ecdh_tmp != NULL)
    497 		EC_KEY_free(sc->peer_ecdh_tmp);
    498 #endif
    499 
    500 	OPENSSL_free(sc);
    501 	}
    502 
    503 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
    504 	{
    505 	sc->peer_cert_type = type;
    506 	return(1);
    507 	}
    508 
    509 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
    510 	{
    511 	X509 *x;
    512 	int i;
    513 	X509_STORE_CTX ctx;
    514 
    515 	if ((sk == NULL) || (sk_X509_num(sk) == 0))
    516 		return(0);
    517 
    518 	x=sk_X509_value(sk,0);
    519 	if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
    520 		{
    521 		SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
    522 		return(0);
    523 		}
    524 #if 0
    525 	if (SSL_get_verify_depth(s) >= 0)
    526 		X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
    527 #endif
    528 	X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
    529 
    530 	/* We need to inherit the verify parameters. These can be determined by
    531 	 * the context: if its a server it will verify SSL client certificates
    532 	 * or vice versa.
    533 	 */
    534 
    535 	X509_STORE_CTX_set_default(&ctx,
    536 				s->server ? "ssl_client" : "ssl_server");
    537 	/* Anything non-default in "param" should overwrite anything in the
    538 	 * ctx.
    539 	 */
    540 	X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
    541 
    542 	if (s->verify_callback)
    543 		X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
    544 
    545 	if (s->ctx->app_verify_callback != NULL)
    546 #if 1 /* new with OpenSSL 0.9.7 */
    547 		i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
    548 #else
    549 		i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
    550 #endif
    551 	else
    552 		{
    553 #ifndef OPENSSL_NO_X509_VERIFY
    554 		i=X509_verify_cert(&ctx);
    555 #else
    556 		i=0;
    557 		ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
    558 		SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
    559 #endif
    560 		}
    561 
    562 	s->verify_result=ctx.error;
    563 	X509_STORE_CTX_cleanup(&ctx);
    564 
    565 	return(i);
    566 	}
    567 
    568 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
    569 	{
    570 	if (*ca_list != NULL)
    571 		sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
    572 
    573 	*ca_list=name_list;
    574 	}
    575 
    576 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
    577 	{
    578 	int i;
    579 	STACK_OF(X509_NAME) *ret;
    580 	X509_NAME *name;
    581 
    582 	ret=sk_X509_NAME_new_null();
    583 	for (i=0; i<sk_X509_NAME_num(sk); i++)
    584 		{
    585 		name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
    586 		if ((name == NULL) || !sk_X509_NAME_push(ret,name))
    587 			{
    588 			sk_X509_NAME_pop_free(ret,X509_NAME_free);
    589 			return(NULL);
    590 			}
    591 		}
    592 	return(ret);
    593 	}
    594 
    595 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
    596 	{
    597 	set_client_CA_list(&(s->client_CA),name_list);
    598 	}
    599 
    600 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
    601 	{
    602 	set_client_CA_list(&(ctx->client_CA),name_list);
    603 	}
    604 
    605 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
    606 	{
    607 	return(ctx->client_CA);
    608 	}
    609 
    610 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
    611 	{
    612 	if (s->type == SSL_ST_CONNECT)
    613 		{ /* we are in the client */
    614 		if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
    615 			(s->s3 != NULL))
    616 			return(s->s3->tmp.ca_names);
    617 		else
    618 			return(NULL);
    619 		}
    620 	else
    621 		{
    622 		if (s->client_CA != NULL)
    623 			return(s->client_CA);
    624 		else
    625 			return(s->ctx->client_CA);
    626 		}
    627 	}
    628 
    629 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
    630 	{
    631 	X509_NAME *name;
    632 
    633 	if (x == NULL) return(0);
    634 	if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
    635 		return(0);
    636 
    637 	if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
    638 		return(0);
    639 
    640 	if (!sk_X509_NAME_push(*sk,name))
    641 		{
    642 		X509_NAME_free(name);
    643 		return(0);
    644 		}
    645 	return(1);
    646 	}
    647 
    648 int SSL_add_client_CA(SSL *ssl,X509 *x)
    649 	{
    650 	return(add_client_CA(&(ssl->client_CA),x));
    651 	}
    652 
    653 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
    654 	{
    655 	return(add_client_CA(&(ctx->client_CA),x));
    656 	}
    657 
    658 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
    659 	{
    660 	return(X509_NAME_cmp(*a,*b));
    661 	}
    662 
    663 #ifndef OPENSSL_NO_STDIO
    664 /*!
    665  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
    666  * it doesn't really have anything to do with clients (except that a common use
    667  * for a stack of CAs is to send it to the client). Actually, it doesn't have
    668  * much to do with CAs, either, since it will load any old cert.
    669  * \param file the file containing one or more certs.
    670  * \return a ::STACK containing the certs.
    671  */
    672 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
    673 	{
    674 	BIO *in;
    675 	X509 *x=NULL;
    676 	X509_NAME *xn=NULL;
    677 	STACK_OF(X509_NAME) *ret = NULL,*sk;
    678 
    679 	sk=sk_X509_NAME_new(xname_cmp);
    680 
    681 	in=BIO_new(BIO_s_file_internal());
    682 
    683 	if ((sk == NULL) || (in == NULL))
    684 		{
    685 		SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
    686 		goto err;
    687 		}
    688 
    689 	if (!BIO_read_filename(in,file))
    690 		goto err;
    691 
    692 	for (;;)
    693 		{
    694 		if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
    695 			break;
    696 		if (ret == NULL)
    697 			{
    698 			ret = sk_X509_NAME_new_null();
    699 			if (ret == NULL)
    700 				{
    701 				SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
    702 				goto err;
    703 				}
    704 			}
    705 		if ((xn=X509_get_subject_name(x)) == NULL) goto err;
    706 		/* check for duplicates */
    707 		xn=X509_NAME_dup(xn);
    708 		if (xn == NULL) goto err;
    709 		if (sk_X509_NAME_find(sk,xn) >= 0)
    710 			X509_NAME_free(xn);
    711 		else
    712 			{
    713 			sk_X509_NAME_push(sk,xn);
    714 			sk_X509_NAME_push(ret,xn);
    715 			}
    716 		}
    717 
    718 	if (0)
    719 		{
    720 err:
    721 		if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
    722 		ret=NULL;
    723 		}
    724 	if (sk != NULL) sk_X509_NAME_free(sk);
    725 	if (in != NULL) BIO_free(in);
    726 	if (x != NULL) X509_free(x);
    727 	if (ret != NULL)
    728 		ERR_clear_error();
    729 	return(ret);
    730 	}
    731 #endif
    732 
    733 /*!
    734  * Add a file of certs to a stack.
    735  * \param stack the stack to add to.
    736  * \param file the file to add from. All certs in this file that are not
    737  * already in the stack will be added.
    738  * \return 1 for success, 0 for failure. Note that in the case of failure some
    739  * certs may have been added to \c stack.
    740  */
    741 
    742 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
    743 					const char *file)
    744 	{
    745 	BIO *in;
    746 	X509 *x=NULL;
    747 	X509_NAME *xn=NULL;
    748 	int ret=1;
    749 	int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
    750 
    751 	oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
    752 
    753 	in=BIO_new(BIO_s_file_internal());
    754 
    755 	if (in == NULL)
    756 		{
    757 		SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
    758 		goto err;
    759 		}
    760 
    761 	if (!BIO_read_filename(in,file))
    762 		goto err;
    763 
    764 	for (;;)
    765 		{
    766 		if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
    767 			break;
    768 		if ((xn=X509_get_subject_name(x)) == NULL) goto err;
    769 		xn=X509_NAME_dup(xn);
    770 		if (xn == NULL) goto err;
    771 		if (sk_X509_NAME_find(stack,xn) >= 0)
    772 			X509_NAME_free(xn);
    773 		else
    774 			sk_X509_NAME_push(stack,xn);
    775 		}
    776 
    777 	ERR_clear_error();
    778 
    779 	if (0)
    780 		{
    781 err:
    782 		ret=0;
    783 		}
    784 	if(in != NULL)
    785 		BIO_free(in);
    786 	if(x != NULL)
    787 		X509_free(x);
    788 
    789 	(void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
    790 
    791 	return ret;
    792 	}
    793 
    794 /*!
    795  * Add a directory of certs to a stack.
    796  * \param stack the stack to append to.
    797  * \param dir the directory to append from. All files in this directory will be
    798  * examined as potential certs. Any that are acceptable to
    799  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
    800  * included.
    801  * \return 1 for success, 0 for failure. Note that in the case of failure some
    802  * certs may have been added to \c stack.
    803  */
    804 
    805 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
    806 				       const char *dir)
    807 	{
    808 	OPENSSL_DIR_CTX *d = NULL;
    809 	const char *filename;
    810 	int ret = 0;
    811 
    812 	CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
    813 
    814 	/* Note that a side effect is that the CAs will be sorted by name */
    815 
    816 	while((filename = OPENSSL_DIR_read(&d, dir)))
    817 		{
    818 		char buf[1024];
    819 		int r;
    820 
    821 		if(strlen(dir)+strlen(filename)+2 > sizeof buf)
    822 			{
    823 			SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
    824 			goto err;
    825 			}
    826 
    827 #ifdef OPENSSL_SYS_VMS
    828 		r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
    829 #else
    830 		r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
    831 #endif
    832 		if (r <= 0 || r >= (int)sizeof(buf))
    833 			goto err;
    834 		if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
    835 			goto err;
    836 		}
    837 
    838 	if (errno)
    839 		{
    840 		SYSerr(SYS_F_OPENDIR, get_last_sys_error());
    841 		ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
    842 		SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
    843 		goto err;
    844 		}
    845 
    846 	ret = 1;
    847 
    848 err:
    849 	if (d) OPENSSL_DIR_end(&d);
    850 	CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
    851 	return ret;
    852 	}
    853 
    854