Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libssl/ssl_cert.c	Lines:	109	241	45.2 %
Date:	2017-11-13	Branches:	44	136	32.4 %


/* $OpenBSD: ssl_cert.c,v 1.66 2017/08/12 02:55:22 jsing Exp $ */
/* 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) 1998-2007 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.
 */

#include <sys/types.h>

#include <dirent.h>
#include <stdio.h>
#include <unistd.h>

#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/dh.h>
#include <openssl/objects.h>
#include <openssl/opensslconf.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>

#include "ssl_locl.h"

int
SSL_get_ex_data_X509_STORE_CTX_idx(void)
{
	static volatile int ssl_x509_store_ctx_idx = -1;
	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;
}

static void
ssl_cert_set_default_md(CERT *cert)
{
	/* Set digest values to defaults */
	cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
	cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
	cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
#ifndef OPENSSL_NO_GOST
	cert->pkeys[SSL_PKEY_GOST01].digest = EVP_gostr341194();
#endif
}

CERT *
ssl_cert_new(void)
{
	CERT *ret;

	ret = calloc(1, sizeof(CERT));
	if (ret == NULL) {
		SSLerrorx(ERR_R_MALLOC_FAILURE);
		return (NULL);
	}
	ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
	ret->references = 1;
	ssl_cert_set_default_md(ret);
	return (ret);
}

CERT *
ssl_cert_dup(CERT *cert)
{
	CERT *ret;
	int i;

	ret = calloc(1, sizeof(CERT));
	if (ret == NULL) {
		SSLerrorx(ERR_R_MALLOC_FAILURE);
		return (NULL);
	}

	/*
	 * same as ret->key = ret->pkeys + (cert->key - cert->pkeys),
	 * if you find that more readable
	 */
	ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];

	ret->valid = cert->valid;
	ret->mask_k = cert->mask_k;
	ret->mask_a = cert->mask_a;

	if (cert->dh_tmp != NULL) {
		ret->dh_tmp = DHparams_dup(cert->dh_tmp);
		if (ret->dh_tmp == NULL) {
			SSLerrorx(ERR_R_DH_LIB);
			goto err;
		}
		if (cert->dh_tmp->priv_key) {
			BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
			if (!b) {
				SSLerrorx(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) {
				SSLerrorx(ERR_R_BN_LIB);
				goto err;
			}
			ret->dh_tmp->pub_key = b;
		}
	}
	ret->dh_tmp_cb = cert->dh_tmp_cb;
	ret->dh_tmp_auto = cert->dh_tmp_auto;

	if (cert->ecdh_tmp) {
		ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
		if (ret->ecdh_tmp == NULL) {
			SSLerrorx(ERR_R_EC_LIB);
			goto err;
		}
	}

	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_DH_RSA:
				/* We have a DH key. */
				break;

			case SSL_PKEY_ECC:
				/* We have an ECC key */
				break;

			default:
				/* Can't happen. */
				SSLerrorx(SSL_R_LIBRARY_BUG);
			}
		}
	}

	/*
	 * ret->extra_certs *should* exist, but currently the own certificate
	 * chain is held inside SSL_CTX
	 */

	ret->references = 1;
	/*
	 * Set digests to defaults. NB: we don't copy existing values
	 * as they will be set during handshake.
	 */
	ssl_cert_set_default_md(ret);

	return (ret);

err:
	DH_free(ret->dh_tmp);
	EC_KEY_free(ret->ecdh_tmp);

	for (i = 0; i < SSL_PKEY_NUM; i++) {
		X509_free(ret->pkeys[i].x509);
		EVP_PKEY_free(ret->pkeys[i].privatekey);
	}
	free (ret);
	return NULL;
}


void
ssl_cert_free(CERT *c)
{
	int i;

	if (c == NULL)
		return;

	i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
	if (i > 0)
		return;

	DH_free(c->dh_tmp);
	EC_KEY_free(c->ecdh_tmp);

	for (i = 0; i < SSL_PKEY_NUM; i++) {
		X509_free(c->pkeys[i].x509);
		EVP_PKEY_free(c->pkeys[i].privatekey);
	}

	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) {
		SSLerrorx(ERR_R_PASSED_NULL_PARAMETER);
		return (0);
	}
	if (*o == NULL) {
		if ((*o = ssl_cert_new()) == NULL) {
			SSLerrorx(ERR_R_MALLOC_FAILURE);
			return (0);
		}
	}
	return (1);
}


SESS_CERT *
ssl_sess_cert_new(void)
{
	SESS_CERT *ret;

	ret = calloc(1, sizeof *ret);
	if (ret == NULL) {
		SSLerrorx(ERR_R_MALLOC_FAILURE);
		return NULL;
	}
	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);
	if (i > 0)
		return;

	sk_X509_pop_free(sc->cert_chain, X509_free);
	for (i = 0; i < SSL_PKEY_NUM; i++)
		X509_free(sc->peer_pkeys[i].x509);

	DH_free(sc->peer_dh_tmp);
	EC_KEY_free(sc->peer_ecdh_tmp);
	free(sc->peer_x25519_tmp);

	free(sc);
}

int
ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
{
	X509_STORE_CTX ctx;
	X509 *x;
	int ret;

	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)) {
		SSLerror(s, ERR_R_X509_LIB);
		return (0);
	}
	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");

	/*
	 * Anything non-default in "param" should overwrite anything
	 * in the ctx.
	 */
	X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);

	if (s->internal->verify_callback)
		X509_STORE_CTX_set_verify_cb(&ctx, s->internal->verify_callback);

	if (s->ctx->internal->app_verify_callback != NULL)
		ret = s->ctx->internal->app_verify_callback(&ctx,
		    s->ctx->internal->app_verify_arg);
	else
		ret = X509_verify_cert(&ctx);

	s->verify_result = ctx.error;
	X509_STORE_CTX_cleanup(&ctx);

	return (ret);
}

static void
set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
    STACK_OF(X509_NAME) *name_list)
{
	sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
	*ca_list = name_list;
}

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);
}

void
SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
{
	set_client_CA_list(&(s->internal->client_CA), name_list);
}

void
SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
{
	set_client_CA_list(&(ctx->internal->client_CA), name_list);
}

STACK_OF(X509_NAME) *
SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
{
	return (ctx->internal->client_CA);
}

STACK_OF(X509_NAME) *
SSL_get_client_CA_list(const SSL *s)
{
	if (s->internal->type == SSL_ST_CONNECT) {
		/* We are in the client. */
		if (((s->version >> 8) == SSL3_VERSION_MAJOR) &&
		    (s->s3 != NULL))
			return (S3I(s)->tmp.ca_names);
		else
			return (NULL);
	} else {
		if (s->internal->client_CA != NULL)
			return (s->internal->client_CA);
		else
			return (s->ctx->internal->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);
}

int
SSL_add_client_CA(SSL *ssl, X509 *x)
{
	return (add_client_CA(&(ssl->internal->client_CA), x));
}

int
SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
{
	return (add_client_CA(&(ctx->internal->client_CA), x));
}

static int
xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
{
	return (X509_NAME_cmp(*a, *b));
}

/*!
 * 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.
 */
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)) {
		SSLerrorx(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) {
				SSLerrorx(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:
		sk_X509_NAME_pop_free(ret, X509_NAME_free);
		ret = NULL;
	}
	sk_X509_NAME_free(sk);
	BIO_free(in);
	X509_free(x);
	if (ret != NULL)
		ERR_clear_error();

	return (ret);
}

/*!
 * 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.
 */

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) {
		SSLerrorx(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);
	}

	ERR_clear_error();

	if (0) {
err:
		ret = 0;
	}
	BIO_free(in);
	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.
 */

int
SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, const char *dir)
{
	DIR *dirp = NULL;
	char *path = NULL;
	int ret = 0;

	dirp = opendir(dir);
	if (dirp) {
		struct dirent *dp;
		while ((dp = readdir(dirp)) != NULL) {
			if (asprintf(&path, "%s/%s", dir, dp->d_name) != -1) {
				ret = SSL_add_file_cert_subjects_to_stack(
				    stack, path);
				free(path);
			}
			if (!ret)
				break;
		}
		(void) closedir(dirp);
	}
	if (!ret) {
 		SYSerror(errno);
		ERR_asprintf_error_data("opendir ('%s')", dir);
		SSLerrorx(ERR_R_SYS_LIB);
	}
	return ret;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ssl_cert.c,v 1.66 2017/08/12 02:55:22 jsing Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58			/* ====================================================================
59			* Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60			*
61			* Redistribution and use in source and binary forms, with or without
62			* modification, are permitted provided that the following conditions
63			* are met:
64			*
65			* 1. Redistributions of source code must retain the above copyright
66			* notice, this list of conditions and the following disclaimer.
67			*
68			* 2. Redistributions in binary form must reproduce the above copyright
69			* notice, this list of conditions and the following disclaimer in
70			* the documentation and/or other materials provided with the
71			* distribution.
72			*
73			* 3. All advertising materials mentioning features or use of this
74			* software must display the following acknowledgment:
75			* "This product includes software developed by the OpenSSL Project
76			* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77			*
78			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79			* endorse or promote products derived from this software without
80			* prior written permission. For written permission, please contact
81			* openssl-core@openssl.org.
82			*
83			* 5. Products derived from this software may not be called "OpenSSL"
84			* nor may "OpenSSL" appear in their names without prior written
85			* permission of the OpenSSL Project.
86			*
87			* 6. Redistributions of any form whatsoever must retain the following
88			* acknowledgment:
89			* "This product includes software developed by the OpenSSL Project
90			* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91			*
92			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103			* OF THE POSSIBILITY OF SUCH DAMAGE.
104			* ====================================================================
105			*
106			* This product includes cryptographic software written by Eric Young
107			* (eay@cryptsoft.com). This product includes software written by Tim
108			* Hudson (tjh@cryptsoft.com).
109			*
110			*/
111			/* ====================================================================
112			* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113			* ECC cipher suite support in OpenSSL originally developed by
114			* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115			*/
116
117			#include <sys/types.h>
118
119			#include <dirent.h>
120			#include <stdio.h>
121			#include <unistd.h>
122
123			#include <openssl/bio.h>
124			#include <openssl/bn.h>
125			#include <openssl/dh.h>
126			#include <openssl/objects.h>
127			#include <openssl/opensslconf.h>
128			#include <openssl/pem.h>
129			#include <openssl/x509v3.h>
130
131			#include "ssl_locl.h"
132
133			int
134			SSL_get_ex_data_X509_STORE_CTX_idx(void)
135			{
136			static volatile int ssl_x509_store_ctx_idx = -1;
137			int got_write_lock = 0;
138
139		4108	CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
140
141	✓✓	2054	if (ssl_x509_store_ctx_idx < 0) {
142		313	CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
143		313	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
144			got_write_lock = 1;
145
146	✓✗	313	if (ssl_x509_store_ctx_idx < 0) {
147		313	ssl_x509_store_ctx_idx =
148		313	X509_STORE_CTX_get_ex_new_index(
149			0, "SSL for verify callback", NULL, NULL, NULL);
150		313	}
151			}
152
153	✓✓	2054	if (got_write_lock)
154		313	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
155			else
156		1741	CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
157
158		2054	return ssl_x509_store_ctx_idx;
159			}
160
161			static void
162			ssl_cert_set_default_md(CERT *cert)
163			{
164			/* Set digest values to defaults */
165		4958	cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
166		2479	cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
167		2479	cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
168			#ifndef OPENSSL_NO_GOST
169		2479	cert->pkeys[SSL_PKEY_GOST01].digest = EVP_gostr341194();
170			#endif
171		2479	}
172
173			CERT *
174			ssl_cert_new(void)
175			{
176			CERT *ret;
177
178		1526	ret = calloc(1, sizeof(CERT));
179	✗✓	763	if (ret == NULL) {
180			SSLerrorx(ERR_R_MALLOC_FAILURE);
181			return (NULL);
182			}
183		763	ret->key = &(ret->pkeys[SSL_PKEY_RSA_ENC]);
184		763	ret->references = 1;
185		763	ssl_cert_set_default_md(ret);
186		763	return (ret);
187		763	}
188
189			CERT *
190			ssl_cert_dup(CERT *cert)
191			{
192			CERT *ret;
193			int i;
194
195		3432	ret = calloc(1, sizeof(CERT));
196	✗✓	1716	if (ret == NULL) {
197			SSLerrorx(ERR_R_MALLOC_FAILURE);
198			return (NULL);
199			}
200
201			/*
202			* same as ret->key = ret->pkeys + (cert->key - cert->pkeys),
203			* if you find that more readable
204			*/
205		1716	ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
206
207		1716	ret->valid = cert->valid;
208		1716	ret->mask_k = cert->mask_k;
209		1716	ret->mask_a = cert->mask_a;
210
211	✓✓	1716	if (cert->dh_tmp != NULL) {
212		150	ret->dh_tmp = DHparams_dup(cert->dh_tmp);
213	✗✓	150	if (ret->dh_tmp == NULL) {
214			SSLerrorx(ERR_R_DH_LIB);
215			goto err;
216			}
217	✗✓	150	if (cert->dh_tmp->priv_key) {
218			BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
219			if (!b) {
220			SSLerrorx(ERR_R_BN_LIB);
221			goto err;
222			}
223			ret->dh_tmp->priv_key = b;
224			}
225	✗✓	150	if (cert->dh_tmp->pub_key) {
226			BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
227			if (!b) {
228			SSLerrorx(ERR_R_BN_LIB);
229			goto err;
230			}
231			ret->dh_tmp->pub_key = b;
232			}
233			}
234		1716	ret->dh_tmp_cb = cert->dh_tmp_cb;
235		1716	ret->dh_tmp_auto = cert->dh_tmp_auto;
236
237	✗✓	1716	if (cert->ecdh_tmp) {
238			ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
239			if (ret->ecdh_tmp == NULL) {
240			SSLerrorx(ERR_R_EC_LIB);
241			goto err;
242			}
243			}
244
245	✓✓	20592	for (i = 0; i < SSL_PKEY_NUM; i++) {
246	✓✓	8580	if (cert->pkeys[i].x509 != NULL) {
247		192	ret->pkeys[i].x509 = cert->pkeys[i].x509;
248		192	CRYPTO_add(&ret->pkeys[i].x509->references, 1,
249			CRYPTO_LOCK_X509);
250		192	}
251
252	✓✓	8580	if (cert->pkeys[i].privatekey != NULL) {
253		192	ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
254		192	CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
255			CRYPTO_LOCK_EVP_PKEY);
256
257	✗✓	192	switch (i) {
258			/*
259			* If there was anything special to do for
260			* certain types of keys, we'd do it here.
261			* (Nothing at the moment, I think.)
262			*/
263
264			case SSL_PKEY_RSA_ENC:
265			case SSL_PKEY_RSA_SIGN:
266			/* We have an RSA key. */
267			break;
268
269			case SSL_PKEY_DH_RSA:
270			/* We have a DH key. */
271			break;
272
273			case SSL_PKEY_ECC:
274			/* We have an ECC key */
275			break;
276
277			default:
278			/* Can't happen. */
279			SSLerrorx(SSL_R_LIBRARY_BUG);
280			}
281			}
282			}
283
284			/*
285			* ret->extra_certs should exist, but currently the own certificate
286			* chain is held inside SSL_CTX
287			*/
288
289		1716	ret->references = 1;
290			/*
291			* Set digests to defaults. NB: we don't copy existing values
292			* as they will be set during handshake.
293			*/
294		1716	ssl_cert_set_default_md(ret);
295
296		1716	return (ret);
297
298			err:
299			DH_free(ret->dh_tmp);
300			EC_KEY_free(ret->ecdh_tmp);
301
302			for (i = 0; i < SSL_PKEY_NUM; i++) {
303			X509_free(ret->pkeys[i].x509);
304			EVP_PKEY_free(ret->pkeys[i].privatekey);
305			}
306			free (ret);
307			return NULL;
308		1716	}
309
310
311			void
312			ssl_cert_free(CERT *c)
313			{
314			int i;
315
316	✗✓	4874	if (c == NULL)
317			return;
318
319		2437	i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
320	✗✓	2437	if (i > 0)
321			return;
322
323		2437	DH_free(c->dh_tmp);
324		2437	EC_KEY_free(c->ecdh_tmp);
325
326	✓✓	29244	for (i = 0; i < SSL_PKEY_NUM; i++) {
327		12185	X509_free(c->pkeys[i].x509);
328		12185	EVP_PKEY_free(c->pkeys[i].privatekey);
329			}
330
331		2437	free(c);
332		4874	}
333
334			int
335			ssl_cert_inst(CERT **o)
336			{
337			/*
338			* Create a CERT if there isn't already one
339			* (which cannot really happen, as it is initially created in
340			* SSL_CTX_new; but the earlier code usually allows for that one
341			* being non-existant, so we follow that behaviour, as it might
342			* turn out that there actually is a reason for it -- but I'm
343			* not sure that all of the existing code could cope with
344			* s->cert being NULL, otherwise we could do without the
345			* initialization in SSL_CTX_new).
346			*/
347
348	✗✓	1176	if (o == NULL) {
349			SSLerrorx(ERR_R_PASSED_NULL_PARAMETER);
350			return (0);
351			}
352	✗✓	588	if (*o == NULL) {
353			if ((*o = ssl_cert_new()) == NULL) {
354			SSLerrorx(ERR_R_MALLOC_FAILURE);
355			return (0);
356			}
357			}
358		588	return (1);
359		588	}
360
361
362			SESS_CERT *
363			ssl_sess_cert_new(void)
364			{
365			SESS_CERT *ret;
366
367		2642	ret = calloc(1, sizeof *ret);
368	✗✓	1321	if (ret == NULL) {
369			SSLerrorx(ERR_R_MALLOC_FAILURE);
370			return NULL;
371			}
372		1321	ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
373		1321	ret->references = 1;
374
375		1321	return ret;
376		1321	}
377
378			void
379			ssl_sess_cert_free(SESS_CERT *sc)
380			{
381			int i;
382
383	✓✓	6068	if (sc == NULL)
384		1713	return;
385
386		1321	i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
387	✗✓	1321	if (i > 0)
388			return;
389
390		1321	sk_X509_pop_free(sc->cert_chain, X509_free);
391	✓✓	15852	for (i = 0; i < SSL_PKEY_NUM; i++)
392		6605	X509_free(sc->peer_pkeys[i].x509);
393
394		1321	DH_free(sc->peer_dh_tmp);
395		1321	EC_KEY_free(sc->peer_ecdh_tmp);
396		1321	free(sc->peer_x25519_tmp);
397
398		1321	free(sc);
399		4355	}
400
401			int
402			ssl_verify_cert_chain(SSL s, STACK_OF(X509) sk)
403			{
404		2582	X509_STORE_CTX ctx;
405			X509 *x;
406			int ret;
407
408	✓✗✗✓	2582	if ((sk == NULL) \|\| (sk_X509_num(sk) == 0))
409			return (0);
410
411		1291	x = sk_X509_value(sk, 0);
412	✗✓	1291	if (!X509_STORE_CTX_init(&ctx, s->ctx->cert_store, x, sk)) {
413			SSLerror(s, ERR_R_X509_LIB);
414			return (0);
415			}
416		1291	X509_STORE_CTX_set_ex_data(&ctx,
417		1291	SSL_get_ex_data_X509_STORE_CTX_idx(), s);
418
419			/*
420			* We need to inherit the verify parameters. These can be
421			* determined by the context: if its a server it will verify
422			* SSL client certificates or vice versa.
423			*/
424		1291	X509_STORE_CTX_set_default(&ctx,
425		1291	s->server ? "ssl_client" : "ssl_server");
426
427			/*
428			* Anything non-default in "param" should overwrite anything
429			* in the ctx.
430			*/
431		1291	X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
432
433	✓✓	1291	if (s->internal->verify_callback)
434		44	X509_STORE_CTX_set_verify_cb(&ctx, s->internal->verify_callback);
435
436	✓✓	1291	if (s->ctx->internal->app_verify_callback != NULL)
437		54	ret = s->ctx->internal->app_verify_callback(&ctx,
438		54	s->ctx->internal->app_verify_arg);
439			else
440		1237	ret = X509_verify_cert(&ctx);
441
442		1291	s->verify_result = ctx.error;
443		1291	X509_STORE_CTX_cleanup(&ctx);
444
445		1291	return (ret);
446		1291	}
447
448			static void
449			set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
450			STACK_OF(X509_NAME) *name_list)
451			{
452			sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
453			*ca_list = name_list;
454			}
455
456			STACK_OF(X509_NAME) *
457			SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
458			{
459			int i;
460			STACK_OF(X509_NAME) *ret;
461			X509_NAME *name;
462
463			ret = sk_X509_NAME_new_null();
464			for (i = 0; i < sk_X509_NAME_num(sk); i++) {
465			name = X509_NAME_dup(sk_X509_NAME_value(sk, i));
466			if ((name == NULL) \|\| !sk_X509_NAME_push(ret, name)) {
467			sk_X509_NAME_pop_free(ret, X509_NAME_free);
468			return (NULL);
469			}
470			}
471			return (ret);
472			}
473
474			void
475			SSL_set_client_CA_list(SSL s, STACK_OF(X509_NAME) name_list)
476			{
477			set_client_CA_list(&(s->internal->client_CA), name_list);
478			}
479
480			void
481			SSL_CTX_set_client_CA_list(SSL_CTX ctx, STACK_OF(X509_NAME) name_list)
482			{
483			set_client_CA_list(&(ctx->internal->client_CA), name_list);
484			}
485
486			STACK_OF(X509_NAME) *
487			SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
488			{
489			return (ctx->internal->client_CA);
490			}
491
492			STACK_OF(X509_NAME) *
493			SSL_get_client_CA_list(const SSL *s)
494			{
495	✓✓	50	if (s->internal->type == SSL_ST_CONNECT) {
496			/* We are in the client. */
497	✓✗✓✗	8	if (((s->version >> 8) == SSL3_VERSION_MAJOR) &&
498		4	(s->s3 != NULL))
499		4	return (S3I(s)->tmp.ca_names);
500			else
501			return (NULL);
502			} else {
503	✗✓	21	if (s->internal->client_CA != NULL)
504			return (s->internal->client_CA);
505			else
506		21	return (s->ctx->internal->client_CA);
507			}
508		25	}
509
510			static int
511			add_client_CA(STACK_OF(X509_NAME) *sk, X509 x)
512			{
513			X509_NAME *name;
514
515			if (x == NULL)
516			return (0);
517			if ((sk == NULL) && ((sk = sk_X509_NAME_new_null()) == NULL))
518			return (0);
519
520			if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
521			return (0);
522
523			if (!sk_X509_NAME_push(*sk, name)) {
524			X509_NAME_free(name);
525			return (0);
526			}
527			return (1);
528			}
529
530			int
531			SSL_add_client_CA(SSL ssl, X509 x)
532			{
533			return (add_client_CA(&(ssl->internal->client_CA), x));
534			}
535
536			int
537			SSL_CTX_add_client_CA(SSL_CTX ctx, X509 x)
538			{
539			return (add_client_CA(&(ctx->internal->client_CA), x));
540			}
541
542			static int
543			xname_cmp(const X509_NAME * const a, const X509_NAME const *b)
544			{
545			return (X509_NAME_cmp(a, b));
546			}
547
548			/*!
549			* Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
550			* it doesn't really have anything to do with clients (except that a common use
551			* for a stack of CAs is to send it to the client). Actually, it doesn't have
552			* much to do with CAs, either, since it will load any old cert.
553			* \param file the file containing one or more certs.
554			* \return a ::STACK containing the certs.
555			*/
556			STACK_OF(X509_NAME) *
557			SSL_load_client_CA_file(const char *file)
558			{
559			BIO *in;
560			X509 *x = NULL;
561			X509_NAME *xn = NULL;
562			STACK_OF(X509_NAME) ret = NULL, sk;
563
564			sk = sk_X509_NAME_new(xname_cmp);
565
566			in = BIO_new(BIO_s_file_internal());
567
568			if ((sk == NULL) \|\| (in == NULL)) {
569			SSLerrorx(ERR_R_MALLOC_FAILURE);
570			goto err;
571			}
572
573			if (!BIO_read_filename(in, file))
574			goto err;
575
576			for (;;) {
577			if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
578			break;
579			if (ret == NULL) {
580			ret = sk_X509_NAME_new_null();
581			if (ret == NULL) {
582			SSLerrorx(ERR_R_MALLOC_FAILURE);
583			goto err;
584			}
585			}
586			if ((xn = X509_get_subject_name(x)) == NULL) goto err;
587			/* check for duplicates */
588			xn = X509_NAME_dup(xn);
589			if (xn == NULL)
590			goto err;
591			if (sk_X509_NAME_find(sk, xn) >= 0)
592			X509_NAME_free(xn);
593			else {
594			sk_X509_NAME_push(sk, xn);
595			sk_X509_NAME_push(ret, xn);
596			}
597			}
598
599			if (0) {
600			err:
601			sk_X509_NAME_pop_free(ret, X509_NAME_free);
602			ret = NULL;
603			}
604			sk_X509_NAME_free(sk);
605			BIO_free(in);
606			X509_free(x);
607			if (ret != NULL)
608			ERR_clear_error();
609
610			return (ret);
611			}
612
613			/*!
614			* Add a file of certs to a stack.
615			* \param stack the stack to add to.
616			* \param file the file to add from. All certs in this file that are not
617			* already in the stack will be added.
618			* \return 1 for success, 0 for failure. Note that in the case of failure some
619			* certs may have been added to \c stack.
620			*/
621
622			int
623			SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
624			const char *file)
625			{
626			BIO *in;
627			X509 *x = NULL;
628			X509_NAME *xn = NULL;
629			int ret = 1;
630			int (oldcmp)(const X509_NAME const a, const X509_NAME const *b);
631
632			oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
633
634			in = BIO_new(BIO_s_file_internal());
635
636			if (in == NULL) {
637			SSLerrorx(ERR_R_MALLOC_FAILURE);
638			goto err;
639			}
640
641			if (!BIO_read_filename(in, file))
642			goto err;
643
644			for (;;) {
645			if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
646			break;
647			if ((xn = X509_get_subject_name(x)) == NULL) goto err;
648			xn = X509_NAME_dup(xn);
649			if (xn == NULL)
650			goto err;
651			if (sk_X509_NAME_find(stack, xn) >= 0)
652			X509_NAME_free(xn);
653			else
654			sk_X509_NAME_push(stack, xn);
655			}
656
657			ERR_clear_error();
658
659			if (0) {
660			err:
661			ret = 0;
662			}
663			BIO_free(in);
664			X509_free(x);
665
666			(void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
667
668			return ret;
669			}
670
671			/*!
672			* Add a directory of certs to a stack.
673			* \param stack the stack to append to.
674			* \param dir the directory to append from. All files in this directory will be
675			* examined as potential certs. Any that are acceptable to
676			* SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will
677			* be included.
678			* \return 1 for success, 0 for failure. Note that in the case of failure some
679			* certs may have been added to \c stack.
680			*/
681
682			int
683			SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) stack, const char dir)
684			{
685			DIR *dirp = NULL;
686			char *path = NULL;
687			int ret = 0;
688
689			dirp = opendir(dir);
690			if (dirp) {
691			struct dirent *dp;
692			while ((dp = readdir(dirp)) != NULL) {
693			if (asprintf(&path, "%s/%s", dir, dp->d_name) != -1) {
694			ret = SSL_add_file_cert_subjects_to_stack(
695			stack, path);
696			free(path);
697			}
698			if (!ret)
699			break;
700			}
701			(void) closedir(dirp);
702			}
703			if (!ret) {
704			SYSerror(errno);
705			ERR_asprintf_error_data("opendir ('%s')", dir);
706			SSLerrorx(ERR_R_SYS_LIB);
707			}
708			return ret;
709			}