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 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 "global.h"

​

#include "embed.h"

#include "duktape.h"

#include "zbxcrypto.h"

#include "zbxjson.h"

​

/******************************************************************************

 *                                                                            *

 * Purpose: export duktape data at the index into buffer                      *

 *                                                                            *

 * Return value: allocated buffer with exported data or NULL on error         *

 *                                                                            *

 * Comments: Throws an error:                                                 *

 *               - if the top value at ctx value stack is non buffer object   *

 *               - if the value stack is empty                                *

 *           The returned buffer must be freed by the caller.                 *

 *                                                                            *

 ******************************************************************************/

char    *es_get_buffer_dyn(duk_context *ctx, int index, duk_size_t *len)

{

    duk_int_t   type;

    const char  *ptr;

    char        *buf = NULL;

​

    *len = 0;

​

    type = duk_get_type(ctx, index);

​

    switch (type)

    {

        case DUK_TYPE_UNDEFINED:

        case DUK_TYPE_NONE:

        case DUK_TYPE_NULL:

            return NULL;

    }

​

    if (NULL != (ptr = duk_get_buffer_data(ctx, index, len)))

    {

        buf = zbx_malloc(NULL, *len);

        memcpy(buf, ptr, *len);

​

        return buf;

    }

​

    if (type == DUK_TYPE_BUFFER)

        return NULL;

​

    if (SUCCEED == es_duktape_string_decode(duk_safe_to_string(ctx, index), &buf))