mikopbx /
Core
| Total Complexity | 74 |
| Total Lines | 619 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
Complex classes like Firewall often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Firewall, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 14 | class Firewall |
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| 15 | { |
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| 16 | private $firewall_enable; |
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| 17 | private $fail2ban_enable; |
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| 18 | |||
| 19 | /** |
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| 20 | * Firewall constructor. |
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| 21 | */ |
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| 22 | public function __construct() |
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| 34 | } |
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| 35 | |||
| 36 | /** |
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| 37 | * Рестарт firewall. |
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| 38 | * |
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| 39 | * @return array |
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| 40 | */ |
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| 41 | public static function reloadFirewall(): array |
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| 65 | } |
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| 66 | |||
| 67 | /** |
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| 68 | * Установка правил Firewall. |
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| 69 | **/ |
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| 70 | public function applyConfig(): void |
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| 71 | { |
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| 72 | self::fail2banStop(); |
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| 73 | $this->dropAllRules(); |
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| 74 | self::fail2banMakeDirs(); |
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| 75 | |||
| 76 | if ($this->firewall_enable) { |
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| 77 | $arr_command = []; |
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| 78 | $arr_command[] = $this->getIptablesInputRule('', '-m conntrack --ctstate ESTABLISHED,RELATED'); |
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| 79 | // Добавляем разрешения на сервисы. |
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| 80 | $this->addFirewallRules($arr_command); |
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| 81 | // Все остальное запрещаем. |
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| 82 | $arr_command[] = $this->getIptablesInputRule('', '', 'DROP'); |
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| 83 | |||
| 84 | // Кастомизация правил firewall. |
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| 85 | $arr_commands_custom = []; |
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| 86 | $out = []; |
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| 87 | Util::fileWriteContent('/etc/firewall_additional', ''); |
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| 88 | |||
| 89 | $catPath = Util::which('cat'); |
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| 90 | $grepPath = Util::which('grep'); |
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| 91 | $busyboxPath = Util::which('busybox'); |
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| 92 | $awkPath = Util::which('awk'); |
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| 93 | Util::mwExec( |
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| 94 | "{$catPath} /etc/firewall_additional | {$grepPath} -v '|' | {$grepPath} -v '&'| {$grepPath} '^iptables' | {$busyboxPath} {$awkPath} -F ';' '{print $1}'", |
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| 95 | $arr_commands_custom |
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| 96 | ); |
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| 97 | if (Util::isSystemctl()) { |
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| 98 | Util::mwMkdir('/etc/iptables'); |
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| 99 | file_put_contents('/etc/iptables/iptables.mikopbx', implode("\n", $arr_command)); |
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| 100 | file_put_contents( |
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| 101 | '/etc/iptables/iptables.mikopbx', |
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| 102 | "\n" . implode("\n", $arr_commands_custom), |
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| 103 | FILE_APPEND |
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| 104 | ); |
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| 105 | $systemctlPath = Util::which('systemctl'); |
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| 106 | Util::mwExec("{$systemctlPath} restart mikopbx_iptables"); |
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| 107 | } else { |
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| 108 | Util::mwExecCommands($arr_command, $out, 'firewall'); |
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| 109 | Util::mwExecCommands($arr_commands_custom, $out, 'firewall_additional'); |
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| 110 | } |
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| 111 | } |
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| 112 | if ($this->fail2ban_enable) { |
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| 113 | // Настройка правил бана. |
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| 114 | $this->writeConfig(); |
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| 115 | self::fail2banStart(); |
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| 116 | } else { |
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| 117 | self::fail2banStop(); |
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| 118 | } |
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| 119 | } |
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| 120 | |||
| 121 | /** |
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| 122 | * Завершение работы fail2ban; |
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| 123 | */ |
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| 124 | public static function fail2banStop(): void |
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| 132 | } |
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| 133 | } |
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| 134 | |||
| 135 | /** |
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| 136 | * Удаление всех правил Firewall. |
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| 137 | */ |
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| 138 | private function dropAllRules(): void |
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| 143 | } |
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| 144 | |||
| 145 | /** |
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| 146 | * Создает служебные директории и ссылки на файлы fail2ban |
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| 147 | * |
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| 148 | * @return string |
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| 149 | */ |
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| 150 | public static function fail2banMakeDirs(): string |
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| 151 | { |
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| 152 | $res_file = self::fail2banGetDbPath(); |
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| 153 | $filename = basename($res_file); |
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| 154 | |||
| 155 | $old_dir_db = '/cf/fail2ban'; |
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| 156 | $dir_db = self::getFail2banDbDir(); |
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| 157 | Util::mwMkdir($dir_db); |
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| 158 | // Создаем рабочие каталоги. |
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| 159 | $db_bd_dir = dirname($res_file); |
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| 160 | Util::mwMkdir($db_bd_dir); |
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| 161 | |||
| 162 | $create_link = false; |
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| 163 | |||
| 164 | // Символическая ссылка на базу данных. |
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| 165 | if (@filetype($res_file) !== 'link') { |
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| 166 | @unlink($res_file); |
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|
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| 167 | $create_link = true; |
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| 168 | } elseif (readlink($res_file) === "$old_dir_db/$filename") { |
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| 169 | @unlink($res_file); |
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| 170 | $create_link = true; |
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| 171 | if (file_exists("$old_dir_db/$filename")) { |
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| 172 | // Перемещаем файл в новое местоположение. |
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| 173 | $mvPath = Util::which('mv'); |
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| 174 | Util::mwExec("{$mvPath} '$old_dir_db/$filename' '$dir_db/$filename'"); |
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| 175 | } |
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| 176 | } |
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| 177 | |||
| 178 | if ($create_link === true) { |
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| 179 | @symlink("$dir_db/$filename", $res_file); |
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| 180 | } |
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| 181 | |||
| 182 | return $res_file; |
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| 183 | } |
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| 184 | |||
| 185 | /** |
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| 186 | * Возвращает путь к файлу базы данных fail2ban. |
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| 187 | * |
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| 188 | * @return string |
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| 189 | */ |
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| 190 | public static function fail2banGetDbPath(): string |
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| 191 | { |
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| 192 | return '/var/lib/fail2ban/fail2ban.sqlite3'; |
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| 193 | } |
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| 194 | |||
| 195 | public static function getFail2banDbDir(): string |
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| 196 | { |
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| 197 | if (Storage::isStorageDiskMounted()) { |
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| 198 | $mount_point = Storage::getMediaDir(); |
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| 199 | $db_dir = "$mount_point/fail2ban"; |
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| 200 | } else { |
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| 201 | $db_dir = "/var/spool/fail2ban"; |
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| 202 | } |
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| 203 | Util::mwMkdir($db_dir); |
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| 204 | if ( ! file_exists($db_dir)) { |
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| 205 | $db_dir = '/tmp'; |
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| 206 | } |
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| 207 | |||
| 208 | return $db_dir; |
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| 209 | } |
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| 210 | |||
| 211 | /** |
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| 212 | * Формирует строку правила iptables |
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| 213 | * |
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| 214 | * @param string $dport |
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| 215 | * @param string $other_data |
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| 216 | * @param string $action |
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| 217 | * |
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| 218 | * @return string |
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| 219 | */ |
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| 220 | private function getIptablesInputRule($dport = '', $other_data = '', $action = 'ACCEPT'): string |
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| 221 | { |
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| 222 | $data_port = ''; |
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| 223 | if (trim($dport) !== '') { |
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| 224 | $data_port = '--dport ' . $dport; |
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| 225 | } |
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| 226 | $other_data = trim($other_data); |
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| 227 | |||
| 228 | return "iptables -A INPUT $other_data $data_port -j $action"; |
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| 229 | } |
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| 230 | |||
| 231 | /** |
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| 232 | * Генератор правил iptables. |
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| 233 | * |
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| 234 | * @param $arr_command |
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| 235 | */ |
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| 236 | private function addFirewallRules(&$arr_command): void |
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| 237 | { |
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| 238 | /** @var \MikoPBX\Common\Models\FirewallRules $result */ |
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| 239 | /** @var \MikoPBX\Common\Models\FirewallRules $rule */ |
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| 240 | /** @var \MikoPBX\Common\Models\FirewallRules $rule */ |
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| 241 | $result = FirewallRules::find(); |
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| 242 | foreach ($result as $rule) { |
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| 243 | if ($rule->portfrom !== $rule->portto && trim($rule->portto) !== '') { |
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| 244 | $port = "{$rule->portfrom}:{$rule->portto}"; |
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| 245 | } else { |
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| 246 | $port = $rule->portfrom; |
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| 247 | } |
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| 248 | /** @var \MikoPBX\Common\Models\NetworkFilters $network_filter */ |
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| 249 | $network_filter = NetworkFilters::findFirst($rule->networkfilterid); |
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| 250 | if ($network_filter === null) { |
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| 251 | Util::sysLogMsg('Firewall', "network_filter_id not found {$rule->networkfilterid}"); |
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| 252 | continue; |
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| 253 | } |
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| 254 | if ('0.0.0.0/0' === $network_filter->permit && $rule->action !== 'allow') { |
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| 255 | continue; |
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| 256 | } |
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| 257 | $other_data = "-p {$rule->protocol}"; |
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| 258 | $other_data .= ($network_filter === null) ? '' : ' -s ' . $network_filter->permit; |
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| 259 | if ($rule->protocol === 'icmp') { |
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| 260 | $port = ''; |
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| 261 | $other_data .= ' --icmp-type echo-request'; |
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| 262 | } |
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| 263 | |||
| 264 | $action = ($rule->action === 'allow') ? 'ACCEPT' : 'DROP'; |
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| 265 | $arr_command[] = $this->getIptablesInputRule($port, $other_data, $action); |
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| 266 | } |
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| 267 | // Разрешим все локальные подключения. |
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| 268 | $arr_command[] = $this->getIptablesInputRule('', '-s 127.0.0.1 ', 'ACCEPT'); |
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| 269 | } |
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| 270 | |||
| 271 | /** |
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| 272 | * Записываем конфиг для fail2ban. Описываем правила блокировок. |
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| 273 | */ |
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| 274 | private function writeConfig(): void |
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| 275 | { |
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| 276 | $user_whitelist = ''; |
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| 277 | /** @var \MikoPBX\Common\Models\Fail2BanRules $res */ |
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| 278 | $res = Fail2BanRules::findFirst("id = '1'"); |
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| 279 | if ($res !== null) { |
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| 280 | $max_retry = $res->maxretry; |
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| 281 | $find_time = $res->findtime; |
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| 282 | $ban_time = $res->bantime; |
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| 283 | $whitelist = $res->whitelist; |
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| 284 | $arr_whitelist = explode(' ', $whitelist); |
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| 285 | foreach ($arr_whitelist as $ip_string) { |
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| 286 | if (Verify::isIpAddress($ip_string)) { |
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| 287 | $user_whitelist .= "$ip_string "; |
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| 288 | } |
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| 289 | } |
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| 290 | $net_filters = NetworkFilters::find("newer_block_ip = '1'"); |
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| 291 | foreach ($net_filters as $filter) { |
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| 292 | $user_whitelist .= "{$filter->permit} "; |
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| 293 | } |
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| 294 | |||
| 295 | $user_whitelist = trim($user_whitelist); |
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| 296 | } else { |
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| 297 | $max_retry = '10'; |
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| 298 | $find_time = '1800'; |
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| 299 | $ban_time = '43200'; |
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| 300 | } |
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| 301 | $this->generateJails(); |
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| 302 | $jails = [ |
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| 303 | 'dropbear' => 'iptables-allports[name=SSH, protocol=all]', |
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| 304 | 'mikoajam' => 'iptables-allports[name=MIKOAJAM, protocol=all]', |
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| 305 | 'mikopbx-www' => 'iptables-allports[name=HTTP, protocol=all]', |
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| 306 | ]; |
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| 307 | $config = "[DEFAULT]\n" . |
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| 308 | "ignoreip = 127.0.0.1 {$user_whitelist}\n\n"; |
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| 309 | |||
| 310 | $syslog_file = System::getSyslogFile(); |
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| 311 | |||
| 312 | foreach ($jails as $jail => $action) { |
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| 313 | $config .= "[{$jail}]\n" . |
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| 314 | "enabled = true\n" . |
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| 315 | "backend = process\n" . |
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| 316 | "logpath = {$syslog_file}\n" . |
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| 317 | // "logprocess = logread -f\n". |
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| 318 | "maxretry = {$max_retry}\n" . |
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| 319 | "findtime = {$find_time}\n" . |
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| 320 | "bantime = {$ban_time}\n" . |
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| 321 | "logencoding = utf-8\n" . |
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| 322 | "action = {$action}\n\n"; |
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| 323 | } |
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| 324 | |||
| 325 | $log_dir = System::getLogDir() . '/asterisk/'; |
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| 326 | $config .= "[asterisk_security_log]\n" . |
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| 327 | "enabled = true\n" . |
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| 328 | "filter = asterisk\n" . |
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| 329 | "action = iptables-allports[name=ASTERISK, protocol=all]\n" . |
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| 330 | "logencoding = utf-8\n" . |
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| 331 | "maxretry = {$max_retry}\n" . |
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| 332 | "findtime = {$find_time}\n" . |
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| 333 | "bantime = {$ban_time}\n" . |
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| 334 | "logpath = {$log_dir}security_log\n\n"; |
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| 335 | |||
| 336 | $config .= "[asterisk_error]\n" . |
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| 337 | "enabled = true\n" . |
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| 338 | "filter = asterisk\n" . |
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| 339 | "action = iptables-allports[name=ASTERISK_ERROR, protocol=all]\n" . |
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| 340 | "maxretry = {$max_retry}\n" . |
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| 341 | "findtime = {$find_time}\n" . |
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| 342 | "bantime = {$ban_time}\n" . |
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| 343 | "logencoding = utf-8\n" . |
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| 344 | "logpath = {$log_dir}error\n\n"; |
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| 345 | |||
| 346 | $config .= "[asterisk_public]\n" . |
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| 347 | "enabled = true\n" . |
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| 348 | "filter = asterisk\n" . |
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| 349 | "action = iptables-allports[name=ASTERISK_PUBLIC, protocol=all]\n" . |
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| 350 | "maxretry = {$max_retry}\n" . |
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| 351 | "findtime = {$find_time}\n" . |
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| 352 | "bantime = {$ban_time}\n" . |
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| 353 | "logencoding = utf-8\n" . |
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| 354 | "logpath = {$log_dir}messages\n\n"; |
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| 355 | |||
| 356 | Util::fileWriteContent('/etc/fail2ban/jail.local', $config); |
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| 357 | } |
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| 358 | |||
| 359 | /** |
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| 360 | * Создаем дополнительные правила. |
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| 361 | */ |
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| 362 | private function generateJails(): void |
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| 363 | { |
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| 364 | $conf = "[INCLUDES]\n" . |
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| 365 | "before = common.conf\n" . |
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| 366 | "[Definition]\n" . |
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| 367 | "_daemon = (authpriv.warn |auth.warn )?miko_ajam\n" . |
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| 368 | 'failregex = ^%(__prefix_line)sFrom\s+<HOST>.\s+UserAgent:\s+[a-zA-Z0-9 \s\.,/:;\+\-_\)\(\[\]]*.\s+Fail\s+auth\s+http.$' . "\n" . |
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| 369 | ' ^%(__prefix_line)sFrom\s+<HOST>.\s+UserAgent:\s+[a-zA-Z0-9 \s\.,/:;\+\-_\)\(\[\]]*.\s+File\s+not\s+found.$' . "\n" . |
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| 370 | "ignoreregex =\n"; |
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| 371 | file_put_contents('/etc/fail2ban/filter.d/mikoajam.conf', $conf); |
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| 372 | |||
| 373 | $conf = "[INCLUDES]\n" . |
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| 374 | "before = common.conf\n" . |
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| 375 | "[Definition]\n" . |
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| 376 | "_daemon = [\S\W\s]+web_auth\n" . |
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| 377 | 'failregex = ^%(__prefix_line)sFrom:\s<HOST>\sUserAgent:(\S|\s)*Wrong password$' . "\n" . |
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| 378 | ' ^(\S|\s)*nginx:\s+\d+/\d+/\d+\s+(\S|\s)*status\s+403(\S|\s)*client:\s+<HOST>(\S|\s)*' . "\n" . |
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| 379 | "ignoreregex =\n"; |
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| 380 | file_put_contents('/etc/fail2ban/filter.d/mikopbx-www.conf', $conf); |
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| 381 | |||
| 382 | $conf = "[INCLUDES]\n" . |
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| 383 | "before = common.conf\n" . |
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| 384 | "[Definition]\n" . |
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| 385 | "_daemon = (authpriv.warn )?dropbear\n" . |
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| 386 | 'prefregex = ^%(__prefix_line)s<F-CONTENT>(?:[Ll]ogin|[Bb]ad|[Ee]xit).+</F-CONTENT>$' . "\n" . |
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| 387 | 'failregex = ^[Ll]ogin attempt for nonexistent user (\'.*\' )?from <HOST>:\d+$' . "\n" . |
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| 388 | ' ^[Bb]ad (PAM )?password attempt for .+ from <HOST>(:\d+)?$' . "\n" . |
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| 389 | ' ^[Ee]xit before auth \(user \'.+\', \d+ fails\): Max auth tries reached - user \'.+\' from <HOST>:\d+\s*$' . "\n" . |
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| 390 | "ignoreregex =\n"; |
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| 391 | file_put_contents('/etc/fail2ban/filter.d/dropbear.conf', $conf); |
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| 392 | } |
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| 393 | |||
| 394 | /** |
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| 395 | * Старт firewall. |
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| 396 | */ |
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| 397 | public static function fail2banStart(): void |
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| 398 | { |
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| 399 | if (Util::isSystemctl()) { |
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| 400 | $systemctlPath = Util::which('systemctl'); |
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| 401 | Util::mwExec("{$systemctlPath} restart fail2ban"); |
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| 402 | |||
| 403 | return; |
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| 404 | } |
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| 405 | // Чистим битые строки, не улдаленные после отмены бана. |
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| 406 | self::cleanFail2banDb(); |
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| 407 | Util::killByName('fail2ban-server'); |
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| 408 | $fail2banPath = Util::which('fail2ban-client'); |
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| 409 | $cmd_start = "{$fail2banPath} -x start"; |
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| 410 | $command = "($cmd_start;) > /dev/null 2>&1 &"; |
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| 411 | Util::mwExec($command); |
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| 412 | } |
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| 413 | |||
| 414 | public static function cleanFail2banDb(): void |
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| 415 | { |
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| 416 | /** @var \MikoPBX\Common\Models\Fail2BanRules $res */ |
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| 417 | $res = Fail2BanRules::findFirst("id = '1'"); |
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| 418 | if ($res !== null) { |
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| 419 | $ban_time = $res->bantime; |
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| 420 | } else { |
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| 421 | $ban_time = '43800'; |
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| 422 | } |
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| 423 | $path_db = self::fail2banGetDbPath(); |
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| 424 | $db = new SQLite3($path_db); |
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| 425 | $db->busyTimeout(3000); |
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| 426 | if (false === self::tableBanExists($db)) { |
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| 427 | return; |
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| 428 | } |
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| 429 | $q = 'DELETE' . ' from bans WHERE (timeofban+' . $ban_time . ')<' . time(); |
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| 430 | $db->query($q); |
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| 431 | } |
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| 432 | |||
| 433 | /** |
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| 434 | * Проверка существования таблицы ban в базе данных. |
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| 435 | * |
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| 436 | * @param SQLite3 $db |
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| 437 | * |
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| 438 | * @return bool |
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| 439 | */ |
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| 440 | public static function tableBanExists($db): bool |
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| 441 | { |
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| 442 | $q_check = 'SELECT' . ' name FROM sqlite_master WHERE type = "table" AND name="bans"'; |
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| 443 | $result_check = $db->query($q_check); |
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| 444 | |||
| 445 | return (false !== $result_check && $result_check->fetchArray(SQLITE3_ASSOC) !== false); |
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| 446 | } |
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| 447 | |||
| 448 | /** |
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| 449 | * Проверка запущен ли fail2ban. |
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| 450 | */ |
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| 451 | public static function checkFail2ban(): void |
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| 456 | } |
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| 457 | } |
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| 458 | |||
| 459 | /** |
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| 460 | * Проверка статуса fail2ban |
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| 461 | * |
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| 462 | * @return bool |
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| 463 | */ |
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| 464 | private function fail2banIsRunning(): bool |
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| 476 | } |
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| 477 | |||
| 478 | /** |
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| 479 | * Удалить адрес из бана. |
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| 480 | * |
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| 481 | * @param $ip |
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| 482 | * |
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| 483 | * @return array |
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| 484 | */ |
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| 485 | public static function fail2banUnbanAll($ip): array |
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| 513 | } |
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| 514 | |||
| 515 | /** |
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| 516 | * Возвращает массив забаненных ip. Либо данные по конкретному адресу. |
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| 517 | * |
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| 518 | * @param null $ip |
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| 519 | * |
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| 520 | * @return array |
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| 521 | */ |
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| 522 | public static function getBanIp($ip = null): array |
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| 523 | { |
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| 524 | $result = []; |
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| 525 | |||
| 526 | /** @var \MikoPBX\Common\Models\Fail2BanRules $res */ |
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| 527 | $res = Fail2BanRules::findFirst("id = '1'"); |
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| 528 | if ($res !== null) { |
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| 529 | $ban_time = $res->bantime; |
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| 530 | } else { |
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| 531 | $ban_time = '43800'; |
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| 532 | } |
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| 533 | |||
| 534 | // Добавленн фильтр по времени бана. возвращаем только адреса, которые еще НЕ разбанены. |
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| 535 | $q = 'SELECT' . ' DISTINCT jail,ip,MAX(timeofban) AS timeofban, MAX(timeofban+' . $ban_time . ') AS timeunban FROM bans where (timeofban+' . $ban_time . ')>' . time( |
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| 536 | ); |
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| 537 | if ($ip !== null) { |
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| 538 | $q .= " AND ip='{$ip}'"; |
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| 539 | } |
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| 540 | $q .= ' GROUP BY jail,ip'; |
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| 541 | |||
| 542 | $path_db = self::fail2banGetDbPath(); |
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| 543 | $db = new SQLite3($path_db); |
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| 544 | $db->busyTimeout(5000); |
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| 545 | |||
| 546 | if (false === self::tableBanExists($db)) { |
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| 547 | // Таблица не существует. Бана нет. |
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| 548 | return $result; |
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| 549 | } |
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| 550 | |||
| 551 | $results = $db->query($q); |
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| 552 | if (false !== $results && $results->numColumns() > 0) { |
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| 553 | while ($res = $results->fetchArray(SQLITE3_ASSOC)) { |
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| 554 | $result[] = $res; |
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| 555 | } |
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| 556 | } |
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| 557 | |||
| 558 | return $result; |
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| 559 | } |
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| 560 | |||
| 561 | /** |
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| 562 | * Удалить из бана конкретный IP из конкретного jail. |
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| 563 | * |
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| 564 | * @param $ip |
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| 565 | * @param $jail |
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| 566 | * |
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| 567 | * @return array |
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| 568 | */ |
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| 569 | public static function fail2banUnban($ip, $jail): array |
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| 570 | { |
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| 571 | $res = ['result' => 'ERROR']; |
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| 572 | $ip = trim($ip); |
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| 573 | // Валидация... |
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| 574 | $matches = []; |
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| 575 | // preg_match_all('/^[a-z-]+$/', $jail, $matches, PREG_SET_ORDER); |
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| 576 | if ( ! Verify::isIpAddress($ip)) { |
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| 577 | // это НЕ IP адрес, или не корректно указан jail. |
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| 578 | $res['message'] = 'Not valid ip or jail.'; |
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| 579 | |||
| 580 | return $res; |
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| 581 | } |
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| 582 | $path_sock = '/var/run/fail2ban/fail2ban.sock'; |
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| 583 | if (file_exists($path_sock) && filetype($path_sock) === 'socket') { |
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| 584 | $out = []; |
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| 585 | $fail2banPath = Util::which('fail2ban-client'); |
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| 586 | Util::mwExec("{$fail2banPath} set {$jail} unbanip {$ip} 2>&1", $out); |
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| 587 | $res_data = trim(implode('', $out)); |
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| 588 | if ($res_data !== $ip && $res_data !== "IP $ip is not banned") { |
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| 589 | $res['message'] = 'Error fail2ban-client. ' . $res_data; |
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| 590 | |||
| 591 | return $res; |
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| 592 | } |
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| 593 | } else { |
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| 594 | $res['message'] = 'Fail2ban not run.'; |
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| 595 | |||
| 596 | return $res; |
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| 597 | } |
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| 598 | |||
| 599 | $res = self::fail2banUnbanDb($ip, $jail); |
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| 600 | |||
| 601 | return $res; |
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| 602 | } |
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| 603 | |||
| 604 | /** |
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| 605 | * Удаление бана из базы. |
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| 606 | * |
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| 607 | * @param $ip |
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| 608 | * @param string $jail |
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| 609 | * |
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| 610 | * @return array |
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| 611 | */ |
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| 612 | public static function fail2banUnbanDb($ip, $jail = ''): array |
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| 633 | ]; |
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| 634 | } |
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| 635 | |||
| 637 |
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If you suppress an error, we recommend checking for the error condition explicitly: