Added rudimentary EPP server

epp/epp.php

@@ -0,0 +1,103 @@
+<?php
+
+require 'vendor/autoload.php';
+
+use Swoole\Coroutine\Server;
+use Swoole\Coroutine\Server\Connection;
+use Swoole\Table;
+use PDO;
+
+$table = new Table(1024);
+$table->column('logged_in', Table::TYPE_INT, 1);
+$table->create();
+
+$db = new PDO('mysql:host=localhost;dbname=epp', 'username', 'password');
+
+$server = new Server('0.0.0.0', 700);
+
+$server->handle(function (Connection $conn) use ($table, $db) {
+    $data = $conn->recv();
+    $xml = simplexml_load_string($data);
+
+    if ($xml === false) {
+        sendEppError($conn, 2001, 'Invalid XML');
+        return;
+    }
+
+    $clID = (string) $xml->command->clTRID;
+    $isLoggedIn = $table->get($clID, 'logged_in');
+
+    // Parsing a login command
+    if ($xml->getName() == 'epp' && isset($xml->command->login)) {
+        $clID = (string) $xml->command->login->clID;
+        $pw = (string) $xml->command->login->pw;
+
+        if (checkLogin($db, $clID, $pw)) {
+            $table->set($clID, ['logged_in' => 1]);
+            $conn->send('Login success!');
+        } else {
+            sendEppError($conn, 2200, 'Authentication error');
+        }
+        return;
+    }
+
+    // Parsing a logout command
+    if ($xml->getName() == 'epp' && isset($xml->command->logout)) {
+        $table->del($clID);
+        $conn->send('Logout success!');
+        return;
+    }
+
+    if (!$isLoggedIn) {
+        sendEppError($conn, 2202, 'Authorization error');
+        return;
+    }
+
+    // Parsing a domain:check command
+    if ($xml->getName() == 'epp' && isset($xml->command->{'check'}->{'domain:check'})) {
+        processDomainCheck($conn, $db, $xml);
+        return;
+    }
+
+    sendEppError($conn, 2100, 'Unknown command');
+});
+
+$server->start();
+
+function processDomainCheck($conn, $db, $xml) {
+    $domains = $xml->command->{'check'}->{'domain:check'}->children('domain', true);
+    $response = '<epp xmlns="urn:ietf:params:xml:ns:epp-1.0"><response><result code="1000"><msg>Command completed successfully</msg></result><resData><domain:chkData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0">';
+
+    foreach ($domains as $domain) {
+        $domainName = (string) $domain;
+        $availability = $db->query("SELECT availability FROM domains WHERE domain_name = '$domainName'")->fetchColumn();
+        $availString = $availability ? 'available' : 'unavailable';
+        $response .= "<domain:cd><domain:name avail=\"$availability\">$domainName</domain:name></domain:cd>";
+    }
+
+    $response .= '</domain:chkData></resData></response></epp>';
+    $conn->send($response);
+}
+
+function checkLogin($db, $clID, $pw) {
+    $stmt = $db->prepare("SELECT password FROM users WHERE username = :username");
+    $stmt->execute(['username' => $clID]);
+    $hashedPassword = $stmt->fetchColumn();
+
+    return password_verify($pw, $hashedPassword);
+}
+
+function sendEppError($conn, $code, $msg) {
+    $errorResponse = <<<XML
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<epp xmlns="urn:ietf:params:xml:ns:epp-1.0">
+  <response>
+    <result code="$code">
+      <msg>$msg</msg>
+    </result>
+  </response>
+</epp>
+XML;
+
+    $conn->send($errorResponse);
+}