/*! \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;

	}