106 lines
2.6 KiB
PHP
106 lines
2.6 KiB
PHP
<?php
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/*
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* SNMP.php
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*
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* -Description-
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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 3 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, see <http://www.gnu.org/licenses/>.
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*
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* @package LibreNMS
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* @link http://librenms.org
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* @copyright 2021 Tony Murray
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* @author Tony Murray <murraytony@gmail.com>
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*/
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namespace LibreNMS;
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use Illuminate\Support\Str;
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use Symfony\Component\Process\Process;
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class SNMPCapabilities
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{
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/**
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* @var bool
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*/
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private static $sha2;
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/**
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* @var bool
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*/
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private static $aes256;
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public static function supportsSHA2(): bool
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{
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if (self::$sha2 === null) {
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self::detectCapabilities();
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}
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return self::$sha2;
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}
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public static function supportsAES256(): bool
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{
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if (self::$aes256 === null) {
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self::detectCapabilities();
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}
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return self::$aes256;
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}
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public static function supportedAuthAlgorithms(): array
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{
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return array_keys(array_filter(self::authAlgorithms()));
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}
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public static function supportedCryptoAlgorithms(): array
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{
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return array_keys(array_filter(self::cryptoAlgoritms()));
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}
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public static function authAlgorithms(): array
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{
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$sha2 = self::supportsSHA2();
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return [
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'SHA' => true,
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'SHA-224' => $sha2,
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'SHA-256' => $sha2,
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'SHA-384' => $sha2,
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'SHA-512' => $sha2,
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'MD5' => true,
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];
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}
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public static function cryptoAlgoritms(): array
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{
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$aes256 = self::supportsAES256();
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return [
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'AES' => true,
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'AES-192' => $aes256,
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'AES-256' => $aes256,
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'AES-256-C' => $aes256,
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'DES' => true,
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];
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}
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private static function detectCapabilities(): void
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{
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$process = new Process([Config::get('snmpget', 'snmpget'), '--help']);
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$process->run();
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self::$sha2 = Str::contains($process->getErrorOutput(), 'SHA-512');
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self::$aes256 = Str::contains($process->getErrorOutput(), 'AES-256');
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}
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}
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