e2ee-chat/debug-flutter-integration.js

A simple realtime chat SDK for web and mobile apps using socket.io with support for end-to-end encryption and multi-tenant backend integration.

const { encryptMessage, decryptMessage } = require("./src/encryption");

const SECRET_KEY = "shared-secret-123";

console.log("🔧 Flutter Integration Debug Tool");
console.log("================================");
console.log("");

// Test 1: Create a message that Flutter should be able to decrypt
console.log("📤 Test 1: JavaScript -> Flutter");
console.log("----------------------------------");
const jsMessage = "Hello from JavaScript!";
const jsEncrypted = encryptMessage(jsMessage, SECRET_KEY);
console.log("Original message:", jsMessage);
console.log("JS encrypted:", jsEncrypted);
console.log("Copy this encrypted text to Flutter and try to decrypt it");
console.log("");

// Test 2: Try to decrypt sample Flutter messages
console.log("📥 Test 2: Flutter -> JavaScript");
console.log("----------------------------------");

// Add sample encrypted messages from Flutter here for testing
const flutterSamples = [
  // Add any encrypted messages from your Flutter app here
  // For example: 'sample_encrypted_message_from_flutter'
];

if (flutterSamples.length === 0) {
  console.log("⚠️  No Flutter sample messages provided");
  console.log("To test:");
  console.log("1. Run this in Flutter with the same secret key:");
  console.log('   String encrypted = _encryptMessage("Test from Flutter");');
  console.log('   print("Encrypted: $encrypted");');
  console.log("2. Copy the encrypted output here");
  console.log("3. Add it to the flutterSamples array above");
} else {
  flutterSamples.forEach((encrypted, index) => {
    try {
      const decrypted = decryptMessage(encrypted, SECRET_KEY);
      console.log(`Sample ${index + 1}:`);
      console.log(`  Encrypted: ${encrypted}`);
      console.log(`  Decrypted: ${decrypted}`);
      console.log(`  ✅ SUCCESS`);
    } catch (error) {
      console.log(`Sample ${index + 1}:`);
      console.log(`  Encrypted: ${encrypted}`);
      console.log(`  ❌ FAILED: ${error.message}`);
    }
    console.log("");
  });
}

console.log("");
console.log("🔍 Debugging Tips:");
console.log("==================");
console.log("1. Ensure both Flutter and JS use the same secret key");
console.log("2. Check that IV handling is consistent");
console.log("3. Verify base64 encoding/decoding");
console.log("4. Test with simple messages first");
console.log("5. Check console logs for decryption errors");
console.log("");
console.log("Current secret key:", SECRET_KEY);
console.log("Encryption method: AES-256-CBC with SHA-256 key derivation");
console.log("IV: Zero IV (16 bytes of zeros)");