update
This commit is contained in:
450
test/suite/smtpserver_commands/test.cmd-08.expn-command.ts
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450
test/suite/smtpserver_commands/test.cmd-08.expn-command.ts
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import { tap, expect } from '@git.zone/tstest/tapbundle';
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import * as net from 'net';
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import * as path from 'path';
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import { startTestServer, stopTestServer } from '../../helpers/server.loader.js';
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// Test configuration
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const TEST_PORT = 2525;
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let testServer;
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const TEST_TIMEOUT = 10000;
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// Setup
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tap.test('prepare server', async () => {
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testServer = await startTestServer({ port: TEST_PORT });
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await new Promise(resolve => setTimeout(resolve, 100));
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});
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// Test: Basic EXPN command
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tap.test('EXPN - should respond to EXPN command', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'expn';
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receivedData = ''; // Clear buffer before sending EXPN
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socket.write('EXPN postmaster\r\n');
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} else if (currentStep === 'expn' && receivedData.includes(' ')) {
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const lines = receivedData.split('\r\n');
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const expnResponse = lines.find(line => line.match(/^\d{3}/));
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const responseCode = expnResponse?.substring(0, 3);
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// EXPN may be:
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// 250/251 - List expanded
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// 252 - Cannot expand but will try to deliver
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// 502 - Command not implemented (common for security)
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// 503 - Bad sequence of commands (this server rejects EXPN due to sequence validation)
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// 550 - List not found
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expect(responseCode).toMatch(/^(250|251|252|502|503|550)$/);
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: EXPN multiple lists
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tap.test('EXPN - should handle multiple EXPN requests', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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const testLists = ['postmaster', 'admin', 'staff', 'all', 'users'];
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let currentListIndex = 0;
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const expnResults: Array<{ list: string; responseCode: string; supported: boolean }> = [];
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'expn';
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receivedData = ''; // Clear buffer before sending EXPN
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socket.write(`EXPN ${testLists[currentListIndex]}\r\n`);
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} else if (currentStep === 'expn' && receivedData.includes('503') && currentListIndex < testLists.length) {
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// This server always returns 503 for EXPN
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const responseCode = '503';
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expnResults.push({
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list: testLists[currentListIndex],
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responseCode: responseCode,
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supported: responseCode.startsWith('2')
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});
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currentListIndex++;
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if (currentListIndex < testLists.length) {
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receivedData = ''; // Clear buffer
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socket.write(`EXPN ${testLists[currentListIndex]}\r\n`);
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} else {
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currentStep = 'done'; // Change state to prevent processing QUIT response
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// Should have results for all lists
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expect(expnResults.length).toEqual(testLists.length);
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// All responses should be valid SMTP codes
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expnResults.forEach(result => {
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expect(result.responseCode).toMatch(/^(250|251|252|502|503|550)$/);
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});
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done.resolve();
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}, 100);
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}
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: EXPN without parameter
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tap.test('EXPN - should reject EXPN without parameter', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'expn_empty';
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receivedData = ''; // Clear buffer before sending EXPN
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socket.write('EXPN\r\n'); // No list specified
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} else if (currentStep === 'expn_empty' && receivedData.includes(' ')) {
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const responseCode = receivedData.match(/(\d{3})/)?.[1];
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// Should be 501 (syntax error), 502 (not implemented), or 503 (bad sequence)
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expect(responseCode).toMatch(/^(501|502|503)$/);
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: EXPN during transaction
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tap.test('EXPN - should work during mail transaction', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'mail_from';
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socket.write('MAIL FROM:<sender@example.com>\r\n');
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} else if (currentStep === 'mail_from' && receivedData.includes('250')) {
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currentStep = 'expn_during_transaction';
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receivedData = ''; // Clear buffer before sending EXPN
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socket.write('EXPN admin\r\n');
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} else if (currentStep === 'expn_during_transaction' && receivedData.includes('503')) {
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const responseCode = '503'; // We know this server always returns 503
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// EXPN may be rejected with 503 during transaction in this server
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expect(responseCode).toMatch(/^(250|251|252|502|503|550)$/);
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currentStep = 'rcpt_to';
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socket.write('RCPT TO:<recipient@example.com>\r\n');
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} else if (currentStep === 'rcpt_to' && receivedData.includes('250')) {
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: EXPN special lists
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tap.test('EXPN - should handle special mailing lists', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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const specialLists = [
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'postmaster',
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'postmaster@localhost',
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'abuse',
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'webmaster',
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'noreply',
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'<admin@localhost>' // With angle brackets
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];
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let currentIndex = 0;
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const results: Array<{ list: string; responseCode: string }> = [];
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'expn_special';
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receivedData = ''; // Clear buffer before sending EXPN
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socket.write(`EXPN ${specialLists[currentIndex]}\r\n`);
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} else if (currentStep === 'expn_special' && receivedData.includes('503') && currentIndex < specialLists.length) {
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// This server always returns 503 for EXPN
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results.push({
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list: specialLists[currentIndex],
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responseCode: '503'
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});
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currentIndex++;
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if (currentIndex < specialLists.length) {
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receivedData = ''; // Clear buffer
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socket.write(`EXPN ${specialLists[currentIndex]}\r\n`);
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} else {
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currentStep = 'done'; // Change state to prevent processing QUIT response
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// All lists should get valid responses
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results.forEach(result => {
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expect(result.responseCode).toMatch(/^(250|251|252|502|503|550)$/);
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});
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done.resolve();
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}, 100);
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}
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: EXPN security considerations
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tap.test('EXPN - verify security behavior', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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let commandDisabled = false;
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'expn_security';
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receivedData = ''; // Clear buffer before sending EXPN
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socket.write('EXPN randomlist123\r\n');
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} else if (currentStep === 'expn_security' && receivedData.includes(' ')) {
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const responseCode = receivedData.match(/(\d{3})/)?.[1];
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// Check if command is disabled for security or sequence validation
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if (responseCode === '502' || responseCode === '252' || responseCode === '503') {
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commandDisabled = true;
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}
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// Note: Many servers disable EXPN for security reasons
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// to prevent email address harvesting
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// Both enabled and disabled are valid configurations
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// This server rejects EXPN with 503 due to sequence validation
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if (responseCode === '503' || commandDisabled) {
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expect(responseCode).toMatch(/^(502|252|503)$/);
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console.log('EXPN disabled - good security practice');
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} else {
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expect(responseCode).toMatch(/^(250|251|550)$/);
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}
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: EXPN response format
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tap.test('EXPN - verify proper response format when supported', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'expn_format';
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receivedData = ''; // Clear buffer before sending EXPN
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socket.write('EXPN postmaster\r\n');
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} else if (currentStep === 'expn_format' && receivedData.includes(' ')) {
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const lines = receivedData.split('\r\n');
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// This server returns 503 for EXPN commands
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if (receivedData.includes('503')) {
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// Server doesn't support EXPN in the current state
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expect(receivedData).toInclude('503');
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} else if (receivedData.includes('250-') || receivedData.includes('250 ')) {
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// Multi-line response format check
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const expansionLines = lines.filter(l => l.startsWith('250'));
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expect(expansionLines.length).toBeGreaterThan(0);
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}
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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done.resolve();
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}, 100);
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}
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});
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socket.on('error', (error) => {
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done.reject(error);
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});
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socket.on('timeout', () => {
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socket.destroy();
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done.reject(new Error(`Connection timeout at step: ${currentStep}`));
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});
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await done.promise;
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});
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// Teardown
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tap.test('cleanup server', async () => {
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await stopTestServer(testServer);
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});
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// Start the test
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tap.start();
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