Zabbix

/*

** Copyright (C) 2001-2024 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

#include "ssh_run.h"

​

#include <libssh2.h>

​

#include "zbxcacheconfig.h"

#include "zbxcomms.h"

#include "zbxfile.h"

#include "zbxstr.h"

​

#if !defined(HAVE_LIBSSH2_METHOD_KEX) && !defined(HAVE_LIBSSH2_METHOD_HOSTKEY) && \

        !defined(HAVE_LIBSSH2_METHOD_CRYPT_CS) && !defined(HAVE_LIBSSH2_METHOD_CRYPT_SC) && \

        !defined(HAVE_LIBSSH2_METHOD_MAC_CS) && !defined(HAVE_LIBSSH2_METHOD_MAC_SC)

#define HAVE_NO_LIBSSH2_METHODS 1

#endif

​

static ZBX_THREAD_LOCAL const char  *password;

​

#ifndef HAVE_NO_LIBSSH2_METHODS

static int  ssh_set_options(LIBSSH2_SESSION *session, int type, const char *key_str, const char *value,

        char **err_msg)

{

    int res, ret = SUCCEED;

​

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

​

    if (0 > (res = libssh2_session_method_pref(session, type, value)) && res != LIBSSH2_ERROR_EAGAIN)

    {

        char        *err;

        const char  **algs;

        int     rc;

​

        if (LIBSSH2_ERROR_NONE != libssh2_session_last_error(session, &err, NULL, 0))

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

        else

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

​

        if (0 < (rc = libssh2_session_supported_algs(session, type, &algs)))

        {

            *err_msg = zbx_strdcat(*err_msg, " Supported values are: ");

​

            for (int i = 0; i < rc; i++)

            {

                *err_msg = zbx_strdcat(*err_msg, algs[i]);

​

                if (i < rc - 1)

                    *err_msg = zbx_strdcat(*err_msg, ", ");

            }

            *err_msg = zbx_strdcat(*err_msg, ".");

​

            libssh2_free(session, algs);

        }

        else

        {

            if (LIBSSH2_ERROR_NONE != libssh2_session_last_error(session, &err, NULL, 0))

                *err_msg = zbx_strdcatf(*err_msg, " Cannot get supported values: %s.", err);

            else

                *err_msg = zbx_strdcat(*err_msg, " Cannot get supported values.");

        }

​

        ret = FAIL;

    }

​

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

​

    return ret;

}

#endif

​

static int  ssh_parse_options(LIBSSH2_SESSION *session, const char *options, char **err_msg)

{

    int ret = SUCCEED;

    char    opt_copy[1024] = {0};

    char    *saveptr;

​

    zbx_strscpy(opt_copy, options);

​

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