denyhosts/clamav/common/linux/cert_util_linux.c

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/*
* OpenSSL certificate verification for Linux.
*
* Copyright (C) 2016-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* Authors: Russ Kubik
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <stdint.h>
#include <stdlib.h>
#include <inttypes.h>
#include <curl/curl.h>
#include "output.h"
#include "cert_util.h"
#include "cert_util_internal.h"
void set_tls_ca_bundle(CURL *curl)
{
char *ca_bundle;
ca_bundle = getenv("CURL_CA_BUNDLE");
if (ca_bundle == NULL)
return;
if (curl_easy_setopt(curl, CURLOPT_CAINFO, ca_bundle) != CURLE_OK) {
fprintf(stderr, "Failed to set CURLOPT_CAINFO!\n");
}
}
cl_error_t cert_store_load(X509 **trusted_certs, size_t trusted_cert_count)
{
cl_error_t ret = CL_EOPEN;
cert_store_t *store = NULL;
int pt_err;
do {
store = cert_store_get_int();
if (!store) {
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mprintf(LOGG_ERROR, "Failed to retrieve cert store\n");
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break;
}
pt_err = pthread_mutex_lock(&store->mutex);
if (pt_err) {
errno = pt_err;
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mprintf(LOGG_ERROR, "Mutex lock failed\n");
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}
if (store->loaded) {
ret = 0;
break;
}
/* System certs do not need to be added as they can be accessed directly
* by the SSL library. */
store->system_certs.count = 0;
store->system_certs.certificates = NULL;
if (trusted_certs && trusted_cert_count > 0) {
if (cert_store_set_trusted_int(trusted_certs, trusted_cert_count) == 0) {
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mprintf(LOGG_DEBUG, "Trusted certificates loaded: %zu\n",
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store->trusted_certs.count);
} else {
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mprintf(LOGG_WARNING, "Continuing without trusted certificates\n");
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/* proceed as if we succeeded using only certificates from the
* system */
}
}
store->loaded = true;
ret = 0;
} while (0);
if (store) {
pt_err = pthread_mutex_unlock(&store->mutex);
if (pt_err) {
errno = pt_err;
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mprintf(LOGG_ERROR, "Mutex unlock failed\n");
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}
}
return ret;
}