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186 lines
4.4 KiB
186 lines
4.4 KiB
1 year ago
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<?php
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/*
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** Zabbix
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** Copyright (C) 2001-2023 Zabbix SIA
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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/**
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* Class is used to validate if given string is valid HashiCorp Vault secret.
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*
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* Valid token must match format:
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* - <namespace>/<path/to/secret>:<key>
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* - <namespace>/<path/to/secret>
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*
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* Mutlibyte strings are supported.
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*/
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class CVaultSecretParser extends CParser {
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private $options = [
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'provider' => ZBX_VAULT_TYPE_UNKNOWN,
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'with_key' => true
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];
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private $cyberark_has_appid = true;
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private $cyberark_has_key = true;
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/**
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* @param array $options
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* @param int $options['provider'] Vault provider.
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* @param bool $options['with_key'] (optional) Validated string must contain key.
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*/
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public function __construct(array $options = []) {
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$this->options = $options + $this->options;
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}
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/**
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* @inheritDoc
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*/
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public function parse($source, $pos = 0) {
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switch ($this->options['provider']) {
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case ZBX_VAULT_TYPE_HASHICORP:
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return $this->parseHashiCorp($source, $pos);
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case ZBX_VAULT_TYPE_CYBERARK:
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return $this->parseCyberArk($source, $pos);
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default:
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return self::PARSE_FAIL;
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}
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}
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private function parseHashiCorp($source, $pos) {
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$this->errorClear();
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$src_size = strlen($source);
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$namespace_sep = strpos($source, '/');
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if ($namespace_sep === false || $namespace_sep == 0 || $namespace_sep == $src_size - 1) {
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$this->errorPos($source, 0);
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return self::PARSE_FAIL;
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}
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if ($this->options['with_key']) {
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$path_pos = $namespace_sep + 1;
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$key_sep = strpos($source, ':', $path_pos);
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if ($source[$key_sep - 1] === '/') {
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$this->errorPos($source, $namespace_sep + 1);
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return self::PARSE_FAIL;
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}
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if ($key_sep === false || $key_sep == $path_pos || $key_sep == $src_size - 1) {
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$this->errorPos($source, $path_pos);
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return self::PARSE_FAIL;
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}
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if (strrpos($source, '//', $key_sep - $src_size) !== false) {
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$this->errorPos($source, $path_pos);
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return self::PARSE_FAIL;
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}
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}
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else {
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if (strpos($source, '//') !== false) {
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$this->errorPos($source, $namespace_sep + 1);
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return self::PARSE_FAIL;
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}
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if ($source[$src_size - 1] === '/') {
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$this->errorPos($source, $namespace_sep + 1);
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return self::PARSE_FAIL;
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}
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}
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return self::PARSE_SUCCESS;
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}
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private function parseCyberArk($source, $pos) {
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$start = $pos;
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$this->errorClear();
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$this->cyberark_has_appid = true;
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$this->cyberark_has_key = true;
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$has_appid = false;
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while (preg_match('/^(?<parameter>[A-Za-z]+)=(?<value>[^+&%:]*)/', substr($source, $pos), $matches) == 1) {
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if ($matches['parameter'] === 'AppID') {
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$has_appid = true;
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}
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$pos += strlen($matches[0]);
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if (!isset($source[$pos]) || $source[$pos] !== '&') {
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break;
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}
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$pos++;
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}
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if ($start == $pos) {
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$this->errorPos($source, $pos);
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return self::PARSE_FAIL;
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}
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if ($this->options['with_key']) {
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if (!isset($source[$pos]) || $source[$pos] !== ':' || !isset($source[++$pos])) {
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$this->errorPos($source, $pos);
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$this->cyberark_has_key = false;
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return self::PARSE_FAIL;
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}
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$pos += strlen(substr($source, $pos));
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}
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if (isset($source[$pos])) {
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$this->errorPos($source, $pos);
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return self::PARSE_FAIL;
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}
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if (!$has_appid) {
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$this->cyberark_has_appid = false;
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$this->errorPos($source, $pos);
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return self::PARSE_FAIL;
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}
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return self::PARSE_SUCCESS;
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}
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/**
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* @inheritDoc
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*/
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public function getError(): string {
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if ($this->options['provider'] == ZBX_VAULT_TYPE_CYBERARK) {
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if (!$this->cyberark_has_appid) {
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return _s('mandatory parameter "%1$s" is missing', 'AppID');
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}
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elseif (!$this->cyberark_has_key) {
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return _('mandatory key is missing');
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}
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}
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return parent::getError();
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}
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}
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