Zabbix

/*

** Zabbix

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** 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 "ssh_run.h"

​

#include "common.h"

​

#include <libssh/libssh.h>

​

#include "comms.h"

#include "log.h"

​

#if (!defined(HAVE_SSH_OPTIONS_KEY_EXCHANGE) && !defined(HAVE_SSH_OPTIONS_HOSTKEYS) && \

        !defined(HAVE_SSH_OPTIONS_CIPHERS_C_S) && !defined(HAVE_SSH_OPTIONS_CIPHERS_S_C) && \

        !defined(HAVE_SSH_OPTIONS_HMAC_C_S) && !defined(HAVE_SSH_OPTIONS_HMAC_S_C)) || \

        !defined(SSH_OPTIONS_PROCESS_CONFIG)

#define HAVE_NO_SSH_OPTIONS 1

#endif

​

/* the size of temporary buffer used to read from data channel */

#define DATA_BUFFER_SIZE    4096

​

extern char *CONFIG_SOURCE_IP;

extern char *CONFIG_SSH_KEY_LOCATION;

​

#ifndef HAVE_NO_SSH_OPTIONS

static int  ssh_set_options(ssh_session session, enum ssh_options_e type, const char *key_str, const char *value,

        char **err_msg)

{

    int ret = SUCCEED;

​

    zabbix_log(LOG_LEVEL_DEBUG, "In %s() key_str:'%s' value:'%s'", __func__, key_str, value);

​

    if (0 > ssh_options_set(session, type, value))

    {

        *err_msg = zbx_dsprintf(NULL, "Cannot set SSH option \"%s\": %s.", key_str, ssh_get_error(session));

​

        ret = FAIL;

    }

​

    zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret));

​

    return ret;

}

​

static int  ssh_parse_options(ssh_session session, const char *options, char **err_msg)

{

    int ret = SUCCEED;

    char    opt_copy[1024] = {0};

    char    *line, *saveptr;

​

    zbx_strscpy(opt_copy, options);

​

    for (line = strtok_r(opt_copy, ";", &saveptr); NULL != line; line = strtok_r(NULL, ";", &saveptr))

    {

        char    *eq_str = strchr(line, '=');

​

        if (NULL != eq_str)

            *eq_str++ = '\0';

​

        eq_str = ZBX_NULL2EMPTY_STR(eq_str);

#ifdef HAVE_SSH_OPTIONS_KEY_EXCHANGE

        if (0 == strncmp(line, KEY_EXCHANGE_STR, ZBX_CONST_STRLEN(KEY_EXCHANGE_STR)))

        {

            if (SUCCEED != (ret = ssh_set_options(session, SSH_OPTIONS_KEY_EXCHANGE, KEY_EXCHANGE_STR,

                    eq_str, err_msg)))

            {

                break;

            }

            continue;

        }

#endif

#ifdef HAVE_SSH_OPTIONS_HOSTKEYS

        if (0 == strncmp(line, KEY_HOSTKEY_STR, ZBX_CONST_STRLEN(KEY_HOSTKEY_STR)))

        {