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 "zbxcommon.h"

​

#include "string.h"

#include <time.h>

#include <stdlib.h>

​

#ifdef HAVE_SYS_UTSNAME_H

#   include <sys/utsname.h>

#endif

​

#define CUID_PID_BLOCK_SIZE     2

#define CUID_HOSTNAME_BLOCK_SIZE    2

#define CUID_BLOCK_SIZE         4

#define CUID_BASE_36            36

#define DISCRETE_VALUES         1679616

#define CUID_TIMESTAMP_SIZE     8

#define PID_TMP_36_BASE_BUF_LEN     10

#define HOST_TMP_36_BASE_BUF_LEN    10

#define RAND_TMP_36_BASE_BUF_LEN    10

​

#define PAD_FILL_CHAR           '0'

​

static char host_block[HOST_TMP_36_BASE_BUF_LEN];

​

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

 *                                                                            *

 * Purpose: modify string in-place to the specified length as required by     *

 *          CUID algorithm                                                    *

 *                                                                            *

 * Parameters:                                                                *

 *     input       - [IN/OUT] input string and result                         *

 *     input_alloc - [IN] buffer size where the input string is stored. It    *

 *                   should be larger than 'pad_size'.                        *

 *     pad_size    - [IN] target length                                       *

 *     fill_char   - [IN] character used to fill target string if there are   *

 *                   not enough existing characters                           *

 *                                                                            *

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

static void pad(char *input, size_t input_alloc, size_t pad_size, char fill_char)

{

    size_t  input_len;

​

    if (pad_size == (input_len = strlen(input)))

        return;

​

    if (pad_size > input_len)   /* make string longer by prepending fill_char s */

    {

        if (pad_size + 1 > input_alloc || input_len + 1 > input_alloc)

        {