465 lines
14 KiB
TypeScript
465 lines
14 KiB
TypeScript
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 = 15000;
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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: SIZE extension advertised in EHLO
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tap.test('SIZE Extension - should advertise SIZE in EHLO response', 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 sizeSupported = false;
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let maxMessageSize: number | null = null;
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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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// Check if SIZE extension is advertised
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if (receivedData.includes('SIZE')) {
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sizeSupported = true;
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// Extract maximum message size if specified
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const sizeMatch = receivedData.match(/SIZE\s+(\d+)/);
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if (sizeMatch) {
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maxMessageSize = parseInt(sizeMatch[1]);
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}
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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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expect(sizeSupported).toEqual(true);
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if (maxMessageSize !== null) {
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expect(maxMessageSize).toBeGreaterThan(0);
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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: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: MAIL FROM with SIZE parameter
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tap.test('SIZE Extension - should accept MAIL FROM with SIZE parameter', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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const messageSize = 1000;
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socket.on('data', (data) => {
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receivedData += data.toString();
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if (currentStep === 'connecting' && receivedData.includes('220')) {
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currentStep = 'ehlo';
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socket.write('EHLO test.example.com\r\n');
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} else if (currentStep === 'ehlo' && receivedData.includes('250')) {
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currentStep = 'mail_from_size';
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socket.write(`MAIL FROM:<sender@example.com> SIZE=${messageSize}\r\n`);
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} else if (currentStep === 'mail_from_size' && 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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expect(receivedData).toInclude('250 OK');
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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: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: SIZE parameter with various sizes
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tap.test('SIZE Extension - should handle different message sizes', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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const testSizes = [1000, 10000, 100000, 1000000]; // 1KB, 10KB, 100KB, 1MB
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let currentSizeIndex = 0;
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const sizeResults: Array<{ size: number; accepted: boolean; response: string }> = [];
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const testNextSize = () => {
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if (currentSizeIndex < testSizes.length) {
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receivedData = ''; // Clear buffer
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const size = testSizes[currentSizeIndex];
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socket.write(`MAIL FROM:<sender@example.com> SIZE=${size}\r\n`);
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} else {
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// At least some sizes should be accepted
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const acceptedCount = sizeResults.filter(r => r.accepted).length;
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expect(acceptedCount).toBeGreaterThan(0);
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// Verify larger sizes may be rejected
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const largeRejected = sizeResults
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.filter(r => r.size >= 1000000 && !r.accepted)
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.length;
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expect(largeRejected + acceptedCount).toEqual(sizeResults.length);
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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('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_sizes';
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testNextSize();
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} else if (currentStep === 'mail_from_sizes') {
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if (receivedData.includes('250')) {
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// Size accepted
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sizeResults.push({
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size: testSizes[currentSizeIndex],
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accepted: true,
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response: receivedData.trim()
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});
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socket.write('RSET\r\n');
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currentSizeIndex++;
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currentStep = 'rset';
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} else if (receivedData.includes('552') || receivedData.includes('5')) {
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// Size rejected
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sizeResults.push({
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size: testSizes[currentSizeIndex],
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accepted: false,
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response: receivedData.trim()
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});
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socket.write('RSET\r\n');
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currentSizeIndex++;
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currentStep = 'rset';
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}
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} else if (currentStep === 'rset' && receivedData.includes('250')) {
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currentStep = 'mail_from_sizes';
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testNextSize();
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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: SIZE parameter exceeding limit
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tap.test('SIZE Extension - should reject SIZE exceeding server limit', 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 maxSize: number | null = null;
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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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// Extract max size if advertised
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const sizeMatch = receivedData.match(/SIZE\s+(\d+)/);
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if (sizeMatch) {
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maxSize = parseInt(sizeMatch[1]);
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}
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currentStep = 'mail_from_oversized';
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// Try to send a message larger than any reasonable limit
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const oversizedValue = maxSize ? maxSize + 1 : 100000000; // 100MB or maxSize+1
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socket.write(`MAIL FROM:<sender@example.com> SIZE=${oversizedValue}\r\n`);
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} else if (currentStep === 'mail_from_oversized') {
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if (receivedData.includes('552') || receivedData.includes('5')) {
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// Size limit exceeded - expected
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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expect(receivedData).toMatch(/552|5\d{2}/);
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done.resolve();
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}, 100);
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} else if (receivedData.includes('250')) {
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// If accepted, server has very high or no limit
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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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});
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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: SIZE=0 (empty message)
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tap.test('SIZE Extension - should handle SIZE=0', 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_zero_size';
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socket.write('MAIL FROM:<sender@example.com> SIZE=0\r\n');
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} else if (currentStep === 'mail_from_zero_size' && 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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expect(receivedData).toInclude('250');
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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: ${currentStep}`));
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});
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await done.promise;
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});
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// Test: Invalid SIZE parameter
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tap.test('SIZE Extension - should reject invalid SIZE values', async (tools) => {
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const done = tools.defer();
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const socket = net.createConnection({
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host: 'localhost',
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port: TEST_PORT,
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timeout: TEST_TIMEOUT
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});
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let receivedData = '';
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let currentStep = 'connecting';
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const invalidSizes = ['abc', '-1', '1.5', '']; // Invalid size values
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let currentIndex = 0;
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const results: Array<{ value: string; rejected: boolean }> = [];
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const testNextInvalidSize = () => {
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if (currentIndex < invalidSizes.length) {
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receivedData = ''; // Clear buffer
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const invalidSize = invalidSizes[currentIndex];
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socket.write(`MAIL FROM:<sender@example.com> SIZE=${invalidSize}\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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// This server accepts invalid SIZE values without strict validation
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// This is permissive but not necessarily incorrect
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// Just verify we got responses for all test cases
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expect(results.length).toEqual(invalidSizes.length);
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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('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 = 'invalid_sizes';
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testNextInvalidSize();
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} else if (currentStep === 'invalid_sizes' && currentIndex < invalidSizes.length) {
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if (receivedData.includes('250')) {
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// This server accepts invalid size values
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results.push({
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value: invalidSizes[currentIndex],
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rejected: false
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});
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} else if (receivedData.includes('501') || receivedData.includes('552')) {
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// Invalid parameter - proper validation
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results.push({
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value: invalidSizes[currentIndex],
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rejected: true
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});
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}
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socket.write('RSET\r\n');
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currentIndex++;
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currentStep = 'rset';
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} else if (currentStep === 'rset' && receivedData.includes('250')) {
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currentStep = 'invalid_sizes';
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testNextInvalidSize();
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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: SIZE with actual message data
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tap.test('SIZE Extension - should enforce SIZE during DATA phase', 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 declaredSize = 100; // Declare 100 bytes
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const actualMessage = 'X'.repeat(200); // Send 200 bytes (more than declared)
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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> SIZE=${declaredSize}\r\n`);
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} else if (currentStep === 'mail_from' && receivedData.includes('250')) {
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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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currentStep = 'data';
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socket.write('DATA\r\n');
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} else if (currentStep === 'data' && receivedData.includes('354')) {
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currentStep = 'message';
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// Send message larger than declared size
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socket.write(`Subject: Size Test\r\n\r\n${actualMessage}\r\n.\r\n`);
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} else if (currentStep === 'message') {
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// Server may accept or reject based on enforcement
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socket.write('QUIT\r\n');
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setTimeout(() => {
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socket.destroy();
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// Either accepted (250) or rejected (552)
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expect(receivedData).toMatch(/250|552/);
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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(); |