/*! \file ssl/ssl_cert.c */

 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

  * All rights reserved.

  *

  * This package is an SSL implementation written

  * by Eric Young (eay@cryptsoft.com).

  * The implementation was written so as to conform with Netscapes SSL.

  * 

  * This library is free for commercial and non-commercial use as long as

  * the following conditions are aheared to.  The following conditions

  * apply to all code found in this distribution, be it the RC4, RSA,

  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

  * included with this distribution is covered by the same copyright terms

  * except that the holder is Tim Hudson (tjh@cryptsoft.com).

  * 

  * Copyright remains Eric Young's, and as such any Copyright notices in

  * the code are not to be removed.

  * If this package is used in a product, Eric Young should be given attribution

  * as the author of the parts of the library used.

  * This can be in the form of a textual message at program startup or

  * in documentation (online or textual) provided with the package.

  * 

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  * 1. Redistributions of source code must retain the copyright

  *    notice, this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright

  *    notice, this list of conditions and the following disclaimer in the

  *    documentation and/or other materials provided with the distribution.

  * 3. All advertising materials mentioning features or use of this software

  *    must display the following acknowledgement:

  *    "This product includes cryptographic software written by

  *     Eric Young (eay@cryptsoft.com)"

  *    The word 'cryptographic' can be left out if the rouines from the library

  *    being used are not cryptographic related :-).

  * 4. If you include any Windows specific code (or a derivative thereof) from 

  *    the apps directory (application code) you must include an acknowledgement:

  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

  * 

  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

  * SUCH DAMAGE.

  * 

  * The licence and distribution terms for any publically available version or

  * derivative of this code cannot be changed.  i.e. this code cannot simply be

  * copied and put under another distribution licence

  * [including the GNU Public Licence.]

  */

 /* ====================================================================

  * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met:

  *

  * 1. Redistributions of source code must retain the above copyright

  *    notice, this list of conditions and the following disclaimer. 

  *

  * 2. Redistributions in binary form must reproduce the above copyright

  *    notice, this list of conditions and the following disclaimer in

  *    the documentation and/or other materials provided with the

  *    distribution.

  *

  * 3. All advertising materials mentioning features or use of this

  *    software must display the following acknowledgment:

  *    "This product includes software developed by the OpenSSL Project

  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

  *

  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

  *    endorse or promote products derived from this software without

  *    prior written permission. For written permission, please contact

  *    openssl-core@openssl.org.

  *

  * 5. Products derived from this software may not be called "OpenSSL"

  *    nor may "OpenSSL" appear in their names without prior written

  *    permission of the OpenSSL Project.

  *

  * 6. Redistributions of any form whatsoever must retain the following

  *    acknowledgment:

  *    "This product includes software developed by the OpenSSL Project

  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

  *

  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

  * OF THE POSSIBILITY OF SUCH DAMAGE.

  * ====================================================================

   *

  * This product includes cryptographic software written by Eric Young

  * (eay@cryptsoft.com).  This product includes software written by Tim

  * Hudson (tjh@cryptsoft.com).

  *

  */

 /* ====================================================================

  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.

  * ECC cipher suite support in OpenSSL originally developed by 

  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.

  */

 /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #include <stdio.h>

 #include "e_os.h"

 #ifndef NO_SYS_TYPES_H

 # include <sys/types.h>

 #endif

 #include "o_dir.h"

 #include <openssl/objects.h>

 #include <openssl/bio.h>

 #include <openssl/pem.h>

 #include <openssl/x509v3.h>

 #ifndef OPENSSL_NO_DH

 #include <openssl/dh.h>

 #endif

 #include <openssl/bn.h>

 #include "ssl_locl.h"

 #ifdef EMULATOR

 	GET_STATIC_VAR_FROM_TLS(ssl_x509_store_ctx_idx,ssl_cert,volatile int)

 	#define ssl_x509_store_ctx_idx (*GET_WSD_VAR_NAME(ssl_x509_store_ctx_idx,ssl_cert,s)())

 #endif

 EXPORT_C int SSL_get_ex_data_X509_STORE_CTX_idx(void)

 	{

 #ifndef EMULATOR

 	static volatile int ssl_x509_store_ctx_idx= -1;

 #endif

 	int got_write_lock = 0;

 	CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);

 	if (ssl_x509_store_ctx_idx < 0)

 		{

 		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);

 		CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);

 		got_write_lock = 1;

 		if (ssl_x509_store_ctx_idx < 0)

 			{

 			ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(

 				0,"SSL for verify callback",NULL,NULL,NULL);

 			}

 		}

 	if (got_write_lock)

 		CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);

 	else

 		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);

 	return ssl_x509_store_ctx_idx;

 	}

 CERT *ssl_cert_new(void)

 	{

 	CERT *ret;

 	ret=(CERT *)OPENSSL_malloc(sizeof(CERT));

 	if (ret == NULL)

 		{

 		SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);

 		return(NULL);

 		}

 	memset(ret,0,sizeof(CERT));

 	ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);

 	ret->references=1;

 	return(ret);

 	}

 CERT *ssl_cert_dup(CERT *cert)

 	{

 	CERT *ret;

 	int i;

 	ret = (CERT *)OPENSSL_malloc(sizeof(CERT));

 	if (ret == NULL)

 		{

 		SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);

 		return(NULL);

 		}

 	memset(ret, 0, sizeof(CERT));

 	ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];

 	/* or ret->key = ret->pkeys + (cert->key - cert->pkeys),

 	 * if you find that more readable */

 	ret->valid = cert->valid;

 	ret->mask = cert->mask;

 	ret->export_mask = cert->export_mask;

 #ifndef OPENSSL_NO_RSA

 	if (cert->rsa_tmp != NULL)

 		{

 		RSA_up_ref(cert->rsa_tmp);

 		ret->rsa_tmp = cert->rsa_tmp;

 		}

 	ret->rsa_tmp_cb = cert->rsa_tmp_cb;

 #endif

 #ifndef OPENSSL_NO_DH

 	if (cert->dh_tmp != NULL)

 		{

 		ret->dh_tmp = DHparams_dup(cert->dh_tmp);

 		if (ret->dh_tmp == NULL)

 			{

 			SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);

 			goto err;

 			}

 		if (cert->dh_tmp->priv_key)

 			{

 			BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);

 			if (!b)

 				{

 				SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);

 				goto err;

 				}

 			ret->dh_tmp->priv_key = b;

 			}

 		if (cert->dh_tmp->pub_key)

 			{

 			BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);

 			if (!b)

 				{

 				SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);

 				goto err;

 				}

 			ret->dh_tmp->pub_key = b;

 			}

 		}

 	ret->dh_tmp_cb = cert->dh_tmp_cb;

 #endif

 #ifndef OPENSSL_NO_ECDH

 	if (cert->ecdh_tmp)

 		{

 		ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);

 		if (ret->ecdh_tmp == NULL)

 			{

 			SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);

 			goto err;

 			}

 		}

 	ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;

 #endif

 	for (i = 0; i < SSL_PKEY_NUM; i++)

 		{

 		if (cert->pkeys[i].x509 != NULL)

 			{

 			ret->pkeys[i].x509 = cert->pkeys[i].x509;

 			CRYPTO_add(&ret->pkeys[i].x509->references, 1,

 				CRYPTO_LOCK_X509);

 			}

 		if (cert->pkeys[i].privatekey != NULL)

 			{

 			ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;

 			CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,

 				CRYPTO_LOCK_EVP_PKEY);

 			switch(i) 

 				{

 				/* If there was anything special to do for

 				 * certain types of keys, we'd do it here.

 				 * (Nothing at the moment, I think.) */

 			case SSL_PKEY_RSA_ENC:

 			case SSL_PKEY_RSA_SIGN:

 				/* We have an RSA key. */

 				break;

 			case SSL_PKEY_DSA_SIGN:

 				/* We have a DSA key. */

 				break;

 			case SSL_PKEY_DH_RSA:

 			case SSL_PKEY_DH_DSA:

 				/* We have a DH key. */

 				break;

 			case SSL_PKEY_ECC:

 				/* We have an ECC key */

 				break;

 			default:

 				/* Can't happen. */

 				SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);

 				}

 			}

 		}

 	/* ret->extra_certs *should* exist, but currently the own certificate

 	 * chain is held inside SSL_CTX */

 	ret->references=1;

 	return(ret);

 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)

 err:

 #endif

 #ifndef OPENSSL_NO_RSA

 	if (ret->rsa_tmp != NULL)

 		RSA_free(ret->rsa_tmp);

 #endif

 #ifndef OPENSSL_NO_DH

 	if (ret->dh_tmp != NULL)

 		DH_free(ret->dh_tmp);

 #endif

 #ifndef OPENSSL_NO_ECDH

 	if (ret->ecdh_tmp != NULL)

 		EC_KEY_free(ret->ecdh_tmp);

 #endif

 	for (i = 0; i < SSL_PKEY_NUM; i++)

 		{

 		if (ret->pkeys[i].x509 != NULL)

 			X509_free(ret->pkeys[i].x509);

 		if (ret->pkeys[i].privatekey != NULL)

 			EVP_PKEY_free(ret->pkeys[i].privatekey);

 		}

 	return NULL;

 	}

 void ssl_cert_free(CERT *c)

 	{

 	int i;

 	if(c == NULL)

 	    return;

 	i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);

 #ifdef REF_PRINT

 	REF_PRINT("CERT",c);

 #endif

 	if (i > 0) return;

 #ifdef REF_CHECK

 	if (i < 0)

 		{

 		fprintf(stderr,"ssl_cert_free, bad reference count\n");

 		abort(); /* ok */

 		}

 #endif

 #ifndef OPENSSL_NO_RSA

 	if (c->rsa_tmp) RSA_free(c->rsa_tmp);

 #endif

 #ifndef OPENSSL_NO_DH

 	if (c->dh_tmp) DH_free(c->dh_tmp);

 #endif

 #ifndef OPENSSL_NO_ECDH

 	if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);

 #endif

 	for (i=0; i<SSL_PKEY_NUM; i++)

 		{

 		if (c->pkeys[i].x509 != NULL)

 			X509_free(c->pkeys[i].x509);

 		if (c->pkeys[i].privatekey != NULL)

 			EVP_PKEY_free(c->pkeys[i].privatekey);

 #if 0

 		if (c->pkeys[i].publickey != NULL)

 			EVP_PKEY_free(c->pkeys[i].publickey);

 #endif

 		}

 	OPENSSL_free(c);

 	}

 int ssl_cert_inst(CERT **o)

 	{

 	/* Create a CERT if there isn't already one

 	 * (which cannot really happen, as it is initially created in

 	 * SSL_CTX_new; but the earlier code usually allows for that one

 	 * being non-existant, so we follow that behaviour, as it might

 	 * turn out that there actually is a reason for it -- but I'm

 	 * not sure that *all* of the existing code could cope with

 	 * s->cert being NULL, otherwise we could do without the

 	 * initialization in SSL_CTX_new).

 	 */

 	if (o == NULL) 

 		{

 		SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);

 		return(0);

 		}

 	if (*o == NULL)

 		{

 		if ((*o = ssl_cert_new()) == NULL)

 			{

 			SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);

 			return(0);

 			}

 		}

 	return(1);

 	}

 SESS_CERT *ssl_sess_cert_new(void)

 	{

 	SESS_CERT *ret;

 	ret = OPENSSL_malloc(sizeof *ret);

 	if (ret == NULL)

 		{

 		SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);

 		return NULL;

 		}

 	memset(ret, 0 ,sizeof *ret);

 	ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);

 	ret->references = 1;

 	return ret;

 	}

 void ssl_sess_cert_free(SESS_CERT *sc)

 	{

 	int i;

 	if (sc == NULL)

 		return;

 	i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);

 #ifdef REF_PRINT

 	REF_PRINT("SESS_CERT", sc);

 #endif

 	if (i > 0)

 		return;

 #ifdef REF_CHECK

 	if (i < 0)

 		{

 		fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");

 		abort(); /* ok */

 		}

 #endif

 	/* i == 0 */

 	if (sc->cert_chain != NULL)

 		sk_X509_pop_free(sc->cert_chain, X509_free);

 	for (i = 0; i < SSL_PKEY_NUM; i++)

 		{

 		if (sc->peer_pkeys[i].x509 != NULL)

 			X509_free(sc->peer_pkeys[i].x509);

 #if 0 /* We don't have the peer's private key.  These lines are just

 	   * here as a reminder that we're still using a not-quite-appropriate

 	   * data structure. */

 		if (sc->peer_pkeys[i].privatekey != NULL)

 			EVP_PKEY_free(sc->peer_pkeys[i].privatekey);

 #endif

 		}

 #ifndef OPENSSL_NO_RSA

 	if (sc->peer_rsa_tmp != NULL)

 		RSA_free(sc->peer_rsa_tmp);

 #endif

 #ifndef OPENSSL_NO_DH

 	if (sc->peer_dh_tmp != NULL)

 		DH_free(sc->peer_dh_tmp);

 #endif

 #ifndef OPENSSL_NO_ECDH

 	if (sc->peer_ecdh_tmp != NULL)

 		EC_KEY_free(sc->peer_ecdh_tmp);

 #endif

 	OPENSSL_free(sc);

 	}

 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)

 	{

 	sc->peer_cert_type = type;

 	return(1);

 	}

 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)

 	{

 	X509 *x;

 	int i;

 	X509_STORE_CTX ctx;

 	if ((sk == NULL) || (sk_X509_num(sk) == 0))

 		return(0);

 	x=sk_X509_value(sk,0);

 	if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))

 		{

 		SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);

 		return(0);

 		}

 	if (s->param)

 		X509_VERIFY_PARAM_inherit(X509_STORE_CTX_get0_param(&ctx),

 						s->param);

 #if 0

 	if (SSL_get_verify_depth(s) >= 0)

 		X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));

 #endif

 	X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);

 	/* We need to inherit the verify parameters. These can be determined by

 	 * the context: if its a server it will verify SSL client certificates

 	 * or vice versa.

 	 */

 	X509_STORE_CTX_set_default(&ctx,

 				s->server ? "ssl_client" : "ssl_server");

 	if (s->verify_callback)

 		X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);

 	if (s->ctx->app_verify_callback != NULL)

 #if 1 /* new with OpenSSL 0.9.7 */

 		i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 

 #else

 		i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */

 #endif

 	else

 		{

 #ifndef OPENSSL_NO_X509_VERIFY

 		i=X509_verify_cert(&ctx);

 #else

 		i=0;

 		ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;

 		SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);

 #endif

 		}

 	s->verify_result=ctx.error;

 	X509_STORE_CTX_cleanup(&ctx);

 	return(i);

 	}

 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)

 	{

 	if (*ca_list != NULL)

 		sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);

 	*ca_list=name_list;

 	}

 EXPORT_C STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)

 	{

 	int i;

 	STACK_OF(X509_NAME) *ret;

 	X509_NAME *name;

 	ret=sk_X509_NAME_new_null();

 	for (i=0; i<sk_X509_NAME_num(sk); i++)

 		{

 		name=X509_NAME_dup(sk_X509_NAME_value(sk,i));

 		if ((name == NULL) || !sk_X509_NAME_push(ret,name))

 			{

 			sk_X509_NAME_pop_free(ret,X509_NAME_free);

 			return(NULL);

 			}

 		}

 	return(ret);

 	}

 EXPORT_C void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)

 	{

 	set_client_CA_list(&(s->client_CA),name_list);

 	}

 EXPORT_C void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)

 	{

 	set_client_CA_list(&(ctx->client_CA),name_list);

 	}

 EXPORT_C STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)

 	{

 	return(ctx->client_CA);

 	}

 EXPORT_C STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)

 	{

 	if (s->type == SSL_ST_CONNECT)

 		{ /* we are in the client */

 		if (((s->version>>8) == SSL3_VERSION_MAJOR) &&

 			(s->s3 != NULL))

 			return(s->s3->tmp.ca_names);

 		else

 			return(NULL);

 		}

 	else

 		{

 		if (s->client_CA != NULL)

 			return(s->client_CA);

 		else

 			return(s->ctx->client_CA);

 		}

 	}

 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)

 	{

 	X509_NAME *name;

 	if (x == NULL) return(0);

 	if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))

 		return(0);

 	if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)

 		return(0);

 	if (!sk_X509_NAME_push(*sk,name))

 		{

 		X509_NAME_free(name);

 		return(0);

 		}

 	return(1);

 	}

 EXPORT_C int SSL_add_client_CA(SSL *ssl,X509 *x)

 	{

 	return(add_client_CA(&(ssl->client_CA),x));

 	}

 EXPORT_C int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)

 	{

 	return(add_client_CA(&(ctx->client_CA),x));

 	}

 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)

 	{

 	return(X509_NAME_cmp(*a,*b));

 	}

 #ifndef OPENSSL_NO_STDIO

 /*!

  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;

  * it doesn't really have anything to do with clients (except that a common use

  * for a stack of CAs is to send it to the client). Actually, it doesn't have

  * much to do with CAs, either, since it will load any old cert.

  * \param file the file containing one or more certs.

  * \return a ::STACK containing the certs.

  */

 EXPORT_C STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)

 	{

 	BIO *in;

 	X509 *x=NULL;

 	X509_NAME *xn=NULL;

 	STACK_OF(X509_NAME) *ret = NULL,*sk;

 	sk=sk_X509_NAME_new(xname_cmp);

 	in=BIO_new(BIO_s_file_internal());

 	if ((sk == NULL) || (in == NULL))

 		{

 		SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);

 		goto err;

 		}

 	if (!BIO_read_filename(in,file))

 		goto err;

 	for (;;)

 		{

 		if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)

 			break;

 		if (ret == NULL)

 			{

 			ret = sk_X509_NAME_new_null();

 			if (ret == NULL)

 				{

 				SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);

 				goto err;

 				}

 			}

 		if ((xn=X509_get_subject_name(x)) == NULL) goto err;

 		/* check for duplicates */

 		xn=X509_NAME_dup(xn);

 		if (xn == NULL) goto err;

 		if (sk_X509_NAME_find(sk,xn) >= 0)

 			X509_NAME_free(xn);

 		else

 			{

 			sk_X509_NAME_push(sk,xn);

 			sk_X509_NAME_push(ret,xn);

 			}

 		}

 	if (0)

 		{

 err:

 		if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);

 		ret=NULL;

 		}

 	if (sk != NULL) sk_X509_NAME_free(sk);

 	if (in != NULL) BIO_free(in);

 	if (x != NULL) X509_free(x);

 	if (ret != NULL)

 		ERR_clear_error();

 	return(ret);

 	}

 #endif

 /*!

  * Add a file of certs to a stack.

  * \param stack the stack to add to.

  * \param file the file to add from. All certs in this file that are not

  * already in the stack will be added.

  * \return 1 for success, 0 for failure. Note that in the case of failure some

  * certs may have been added to \c stack.

  */

 EXPORT_C int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,

 					const char *file)

 	{

 	BIO *in;

 	X509 *x=NULL;

 	X509_NAME *xn=NULL;

 	int ret=1;

 	int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);

 	oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);

 	in=BIO_new(BIO_s_file_internal());

 	if (in == NULL)

 		{

 		SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);

 		goto err;

 		}

 	if (!BIO_read_filename(in,file))

 		goto err;

 	for (;;)

 		{

 		if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)

 			break;

 		if ((xn=X509_get_subject_name(x)) == NULL) goto err;

 		xn=X509_NAME_dup(xn);

 		if (xn == NULL) goto err;

 		if (sk_X509_NAME_find(stack,xn) >= 0)

 			X509_NAME_free(xn);

 		else

 			sk_X509_NAME_push(stack,xn);

 		}

 	if (0)

 		{

 err:

 		ret=0;

 		}

 	if(in != NULL)

 		BIO_free(in);

 	if(x != NULL)

 		X509_free(x);

 	(void)sk_X509_NAME_set_cmp_func(stack,oldcmp);

 	return ret;

 	}

 /*!

  * Add a directory of certs to a stack.

  * \param stack the stack to append to.

  * \param dir the directory to append from. All files in this directory will be

  * examined as potential certs. Any that are acceptable to

  * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be

  * included.

  * \return 1 for success, 0 for failure. Note that in the case of failure some

  * certs may have been added to \c stack.

  */

 EXPORT_C int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,

 				       const char *dir)

 	{

 	OPENSSL_DIR_CTX *d = NULL;

 	const char *filename;

 	int ret = 0;

 	CRYPTO_w_lock(CRYPTO_LOCK_READDIR);

 	/* Note that a side effect is that the CAs will be sorted by name */

 	while((filename = OPENSSL_DIR_read(&d, dir)))

 		{

 		char buf[1024];

 		int r;

 		if(strlen(dir)+strlen(filename)+2 > sizeof buf)

 			{

 			SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);

 			goto err;

 			}

 #ifdef OPENSSL_SYS_VMS

 		r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);

 #else

 		r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);

 #endif

 		if (r <= 0 || r >= (int)sizeof(buf))

 			goto err;

 		if(!SSL_add_file_cert_subjects_to_stack(stack,buf))

 			goto err;

 		}

 	if (errno)

 		{

 		SYSerr(SYS_F_OPENDIR, get_last_sys_error());

 		ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");

 		SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);

 		goto err;

 		}

 	ret = 1;

 err:

 	if (d) OPENSSL_DIR_end(&d);

 	CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);

 	return ret;

 	}