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<?php |
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/* |
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* MikoPBX - free phone system for small business |
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* Copyright (C) 2017-2020 Alexey Portnov and Nikolay Beketov |
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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 along with this program. |
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* If not, see <https://www.gnu.org/licenses/>. |
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*/ |
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namespace MikoPBX\Core\System\Configs; |
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use MikoPBX\Common\Models\PbxSettings; |
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use MikoPBX\Core\System\MikoPBXConfig; |
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use MikoPBX\Core\System\Notifications; |
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use MikoPBX\Core\System\Processes; |
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use MikoPBX\Core\System\Util; |
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use Phalcon\Di\Injectable; |
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class SSHConf extends Injectable |
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{ |
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private MikoPBXConfig $mikoPBXConfig; |
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public const CHECK_PASSWORD_FILE = '/var/etc/last-check-password'; |
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/** |
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* SSHConf constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->mikoPBXConfig = new MikoPBXConfig(); |
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} |
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/** |
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* Configure SSH settings |
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**/ |
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public function configure(): bool |
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{ |
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if(Util::isSystemctl() && ! Util::isDocker()){ |
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// Не настраиваем. |
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return true; |
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} |
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$lofFile = '/var/log/lastlog'; |
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if(!file_exists($lofFile)){ |
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file_put_contents($lofFile, ''); |
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} |
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$dropBearDir = '/etc/dropbear'; |
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Util::mwMkdir($dropBearDir); |
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$keytypes = [ |
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"rsa" => "SSHRsaKey", |
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"dss" => "SSHDssKey", |
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"ecdsa" => "SSHecdsaKey" |
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]; |
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$options = ($this->mikoPBXConfig->getGeneralSettings('SSHDisablePasswordLogins') === '1')?'-s':''; |
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// Get keys from DB |
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$dropbearkeyPath = Util::which('dropbearkey'); |
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$dropbearPath = Util::which('dropbear'); |
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foreach ($keytypes as $keytype => $db_key) { |
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$res_keyfilepath = "{$dropBearDir}/dropbear_" . $keytype . "_host_key"; |
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$key = $this->mikoPBXConfig->getGeneralSettings($db_key); |
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$key = (isset($key) && is_string($key)) ? trim($key) : ""; |
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if (strlen($key) > 100) { |
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// Store key to file |
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file_put_contents($res_keyfilepath, base64_decode($key)); |
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} |
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// If key not exists, we will generate and store new one into file and database |
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if ( ! file_exists($res_keyfilepath)) { |
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// Generation |
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Processes::mwExec("{$dropbearkeyPath} -t $keytype -f $res_keyfilepath"); |
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// Storing |
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$new_key = base64_encode(file_get_contents($res_keyfilepath)); |
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$this->mikoPBXConfig->setGeneralSettings($db_key, $new_key); |
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} |
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} |
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$ssh_port = escapeshellcmd($this->mikoPBXConfig->getGeneralSettings('SSHPort')); |
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// Restart dropbear |
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$this->updateShellPassword(); |
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Processes::killByName('dropbear'); |
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usleep(500000); |
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$result = Processes::mwExec("{$dropbearPath} -p '{$ssh_port}' $options -c /etc/rc/hello > /var/log/dropbear_start.log"); |
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$this->generateAuthorizedKeys(); |
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return ($result === 0); |
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} |
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/** |
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* Stores authorized_keys from DB to files |
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*/ |
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public function generateAuthorizedKeys(): void |
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{ |
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$ssh_dir = '/root/.ssh'; |
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Util::mwMkdir($ssh_dir); |
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$conf_data = $this->mikoPBXConfig->getGeneralSettings('SSHAuthorizedKeys'); |
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file_put_contents("{$ssh_dir}/authorized_keys", $conf_data); |
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} |
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/** |
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* Setups root user password |
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**/ |
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public function updateShellPassword(): void |
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{ |
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$password = $this->mikoPBXConfig->getGeneralSettings('SSHPassword'); |
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$hashString = $this->mikoPBXConfig->getGeneralSettings('SSHPasswordHashString'); |
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$echoPath = Util::which('echo'); |
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$chpasswdPath = Util::which('chpasswd'); |
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Processes::mwExec("{$echoPath} \"root:$password\" | {$chpasswdPath}"); |
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$this->mikoPBXConfig->setGeneralSettings('SSHPasswordHash', md5_file('/etc/passwd')); |
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if($hashString !== md5($password)){ |
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$this->mikoPBXConfig->setGeneralSettings('SSHPasswordHashString', md5($password)); |
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$this->sendNotify('Attention! SSH password changed!', ['The password for SSH access to the PBX has been changed']); |
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unlink(self::CHECK_PASSWORD_FILE); |
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} |
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} |
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/** |
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* @param $subject |
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* @param $messages |
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* @return void |
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*/ |
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private function sendNotify($subject, $messages):void |
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{ |
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if(!Notifications::checkConnection(Notifications::TYPE_PHP_MAILER)){ |
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return; |
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} |
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$subject = Util::translate($subject, false); |
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$text = ''; |
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foreach ($messages as $message){ |
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$text .= PHP_EOL.Util::translate($message, false); |
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} |
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$adminMail = $this->mikoPBXConfig->getGeneralSettings('SystemNotificationsEmail'); |
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$notify = new Notifications(); |
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$notify->sendMail($adminMail, $subject, trim($text)); |
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} |
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/** |
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* Проверка пароля на случай, если он был изменен не обычным способом (взлом системы). |
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* @return void |
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*/ |
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public static function checkPassword():void |
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{ |
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$enableNotify = true; |
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$data = stat(self::CHECK_PASSWORD_FILE); |
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if($data){ |
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$enableNotify = (time() - stat('/etc/asterisk/asterisk.conf')['mtime']??0) > 60*60*4; |
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} |
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$messages = []; |
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$password = PbxSettings::getValueByKey('SSHPassword'); |
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$hashString = PbxSettings::getValueByKey('SSHPasswordHashString'); |
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$hashFile = PbxSettings::getValueByKey('SSHPasswordHash'); |
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if($hashString !== md5($password)){ |
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// Изменился пароль. Не обычным способом. |
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$messages[] = 'The SSH password was not changed from the web interface.'; |
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} |
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if($hashFile !== md5_file('/etc/passwd')){ |
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// Системный пароль не соответствует тому, что установлен в конфигурационном файле. |
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$messages[] = 'The system password does not match what is set in the configuration file.'; |
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} |
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if(!empty($messages) && $enableNotify){ |
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file_put_contents(self::CHECK_PASSWORD_FILE, time()); |
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$SSHConf = new SSHConf(); |
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$SSHConf->sendNotify('Attention! SSH password compromised', $messages); |
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} |
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} |
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} |
mikopbx /
Core
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.