import 'dart:io'; import 'package:selfprivacy/logic/models/json/dns_records.dart'; import 'package:url_launcher/url_launcher.dart'; enum DnsRecordStatus { ok, waiting, nonexistent } /// Check if DNS records were recognized. /// /// Return pairs of full record name matched to its status. /// /// If no record found, return just one pair of [domain] matched to critical non-existent status. /// /// - [domain] - full domain delegated to SelfPrivacy (e.g. reimu.love) /// - [subdomains] - list of all subdomains we want to validate recods of (e.g. api, cloud...) /// - [ip4] - IP address of our server we want to validate DNS records by (e.g. 127.0.0.1) Future> validateDnsMatch( final String domain, final List subdomains, final String ip4, ) async { final Map matches = {}; Future lookup(final String address) async { await InternetAddress.lookup(address).then( (final records) { for (final record in records) { final bool isIpCorrect = record.address == ip4; matches[record.host] = isIpCorrect ? DnsRecordStatus.ok : DnsRecordStatus.waiting; } }, ); } try { await lookup(domain); for (final subdomain in subdomains) { await lookup('$subdomain.$domain'); } } catch (e) { print(e); } if (matches.isEmpty) { matches[domain] = DnsRecordStatus.nonexistent; } return matches; } DnsRecord? extractDkimRecord(final List records) { DnsRecord? dkimRecord; for (final DnsRecord record in records) { if (record.type == 'TXT' && record.name == 'selector._domainkey') { dkimRecord = record; } } return dkimRecord; } String getHostnameFromDomain(final String domain) { // Replace all non-alphanumeric characters with an underscore String hostname = domain.split('.')[0].replaceAll(RegExp(r'[^a-zA-Z0-9]'), '-'); if (hostname.endsWith('-')) { hostname = hostname.substring(0, hostname.length - 1); } if (hostname.startsWith('-')) { hostname = hostname.substring(1); } if (hostname.isEmpty) { hostname = 'selfprivacy-server'; } return hostname; } void launchURL(final url) async { try { final Uri uri = Uri.parse(url); await launchUrl( uri, mode: LaunchMode.externalApplication, ); } catch (e) { print(e); } } List getProjectDnsRecords( final String? domainName, final String? ip4, ) { final DnsRecord domainA = DnsRecord(type: 'A', name: domainName, content: ip4); final DnsRecord mx = DnsRecord(type: 'MX', name: '@', content: domainName); final DnsRecord apiA = DnsRecord(type: 'A', name: 'api', content: ip4); final DnsRecord cloudA = DnsRecord(type: 'A', name: 'cloud', content: ip4); final DnsRecord gitA = DnsRecord(type: 'A', name: 'git', content: ip4); final DnsRecord meetA = DnsRecord(type: 'A', name: 'meet', content: ip4); final DnsRecord passwordA = DnsRecord(type: 'A', name: 'password', content: ip4); final DnsRecord socialA = DnsRecord(type: 'A', name: 'social', content: ip4); final DnsRecord vpn = DnsRecord(type: 'A', name: 'vpn', content: ip4); final DnsRecord txt1 = DnsRecord( type: 'TXT', name: '_dmarc', content: 'v=DMARC1; p=none', ttl: 18000, ); final DnsRecord txt2 = DnsRecord( type: 'TXT', name: domainName, content: 'v=spf1 a mx ip4:$ip4 -all', ttl: 18000, ); final DnsRecord txt3 = DnsRecord( type: 'TXT', name: 'selector._domainkey', content: 'v=DKIM1; k=rsa; p=none', ttl: 18000, ); return [ domainA, apiA, cloudA, gitA, meetA, passwordA, socialA, mx, txt1, txt2, txt3, vpn, ]; }