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32 daniel-mar 1
<?php
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/*
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 * VNag - Nagios Framework for PHP
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 * Developed by Daniel Marschall, ViaThinkSoft <www.viathinksoft.com>
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 * Licensed under the terms of the Apache 2.0 license
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 *
76 daniel-mar 8
 * Revision 2023-10-13
32 daniel-mar 9
 */
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declare(ticks=1);
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class NextCloudVersionCheck extends VNag {
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        protected $argSystemDir = null;
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        public function __construct() {
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                parent::__construct();
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                $this->registerExpectedStandardArguments('Vvht');
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                $this->getHelpManager()->setPluginName('check_nextcloud_version');
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                $this->getHelpManager()->setVersion('2023-10-13');
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                $this->getHelpManager()->setShortDescription('This plugin checks if a local Nextcloud system has the latest version installed.');
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                $this->getHelpManager()->setCopyright('Copyright (C) 2011-$CURYEAR$ Daniel Marschall, ViaThinkSoft.');
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                $this->getHelpManager()->setSyntax('$SCRIPTNAME$ [-d <directory>]');
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                $this->getHelpManager()->setFootNotes('If you encounter bugs, please contact ViaThinkSoft at www.viathinksoft.com');
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                // Individual (non-standard) arguments:
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                $this->addExpectedArgument($this->argSystemDir = new VNagArgument('d', 'directory', VNagArgument::VALUE_REQUIRED, 'nextCloudPath', 'The local directory where your Nextcloud installation is located.'));
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        }
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        protected function get_versions($local_path) {
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                $local_path = realpath($local_path) === false ? $local_path : realpath($local_path);
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                if (!file_exists($local_path . '/version.php')) {
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                        throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'".');
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                }
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                // We don't include version.php because it would be a security vulnerability
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                // code injection if somebody controls version.php
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                $cont = @file_get_contents($local_path . '/version.php');
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                if ($cont === false) {
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                        throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'". Missing file version.php.');
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                }
33 daniel-mar 45
                if (preg_match('@\\$(OC_Version)\\s*=\\s*array\\(\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*,\\s*(.+)\\s*\\)\\s*;@ismU', $cont, $m)) {
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                        $OC_Version = array($m[2],$m[3],$m[4],$m[5]);
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                } else {
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                        throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'". Missing "OC_Version".');
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                }
33 daniel-mar 50
                if (preg_match('@\\$(OC_VersionString)\\s*=\\s*([\'"])(.*)\\2\\s*;@ismU', $cont, $m)) {
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                        $OC_VersionString = $m[3];
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                } else {
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                        throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'". Missing "OC_VersionString".');
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                }
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                if (preg_match('@\\$(OC_Edition)\\s*=\\s*([\'"])(.*)\\2\\s*;@ismU', $cont, $m)) {
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                        $OC_Edition = $m[3];
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                } else {
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                        throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'". Missing "OC_Edition".');
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                }
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                if (preg_match('@\\$(OC_Channel)\\s*=\\s*([\'"])(.*)\\2\\s*;@ismU', $cont, $m)) {
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                        $OC_Channel = $m[3];
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                } else {
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                        throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'". Missing "OC_Channel".');
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                }
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                if (preg_match('@\\$(OC_Build)\\s*=\\s*([\'"])(.*)\\2\\s*;@ismU', $cont, $m)) {
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                        $OC_Build = $m[3];
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                } else {
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                        throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'". Missing "OC_Build".');
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                }
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                if (preg_match('@\\$(vendor)\\s*=\\s*([\'"])(.*)\\2\\s*;@ismU', $cont, $m)) {
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                        $vendor = $m[3];
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                        if ($vendor != 'nextcloud') {
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                                throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'". It is "'.$vendor.'".');
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                        }
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                } else {
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                        throw new VNagException('This is not a valid Nextcloud installation in "'.$local_path.'". Missing "vendor".');
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                }
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                $baseUrl = 'https://updates.nextcloud.org/updater_server/';
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                // More information about the paramters, see https://github.com/nextcloud/updater_server/blob/master/src/Request.php
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                $php_version = explode('.', PHP_VERSION);
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                $update_url = $baseUrl . '?version='.
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                              implode('x', $OC_Version).'x'.
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                              'x'. // installationMtime
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                              'x'. // lastCheck
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                              $OC_Channel.'x'.
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                              $OC_Edition.'x'.
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                              urlencode($OC_Build).'x'.
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                              $php_version[0].'x'.
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                              $php_version[1].'x'.
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                              intval($php_version[2]); // Last part could be something like "28-2+0~20210604.85+debian9~1.gbp219f11"
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                $cont = $this->url_get_contents($update_url);
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                if ($cont === false) {
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                        throw new VNagException('Could not determinate current Nextcloud version in "'.$local_path.'". (Cannot access '.$update_url.')');
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                }
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                if ($cont === '') {
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                        return array($OC_VersionString, $OC_VersionString, $OC_Channel);
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                } else {
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                        $xml = simplexml_load_string($cont);
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                        if ($xml === false) {
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                                throw new VNagException('Could not determinate current Nextcloud version in "'.$local_path.'". (Invalid XML downloaded from update server)');
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                        }
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                        $new_ver = (string)$xml->version;
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                        return array($OC_VersionString, $new_ver, $OC_Channel);
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                }
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        }
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        protected function cbRun($optional_args=array()) {
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                $system_dir = $this->argSystemDir->getValue();
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                if (empty($system_dir)) {
77 daniel-mar 114
                        throw new VNagException("Please specify the directory of the Nextcloud installation.");
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                }
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                $system_dir = realpath($system_dir) === false ? $system_dir : realpath($system_dir);
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                if (!is_dir($system_dir)) {
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                        throw new VNagException('Directory "'.$system_dir.'" not found.');
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                }
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                list($cur_ver, $new_ver, $channel) = $this->get_versions($system_dir);
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                if (version_compare($cur_ver,$new_ver) >= 0) {
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                        $this->setStatus(VNag::STATUS_OK);
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                        $this->setHeadline("Nextcloud version $cur_ver [$channel] is the latest available version for your Nextcloud installation at $system_dir", true);
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                } else {
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                        $this->setStatus(VNag::STATUS_WARNING);
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                        $this->setHeadline("Nextcloud version $cur_ver [$channel] is outdated. Newer version is $new_ver [$channel] for installation at $system_dir", true);
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                }
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        }
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}