Unhandled Exception: Assertion failed: Instance of 'InvalidKeyException'

[sky-flutter]

I just copy the code from pub.dev in my project and run the project this error I got.

[xni06]

What error?

[sky-flutter]

I changed my code and thereafter I got invalidkeyexception

[woinbo]

The same happened to me too!!!

I just copy the code from pub.dev in my project and run the project this error I got.

[woinbo]

@xni06 This is the error coming...

E/flutter (23216): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: Assertion failed: Instance of 'InvalidKeyException'
E/flutter (23216): #0 SessionState.getSenderRatchetKey
package:libsignal_protocol_dart/…/state/SessionState.dart:103
E/flutter (23216): #1 SessionCipher.encrypt
package:libsignal_protocol_dart/src/SessionCipher.dart:59
E/flutter (23216): #2 install
package:signal/main.dart:40
E/flutter (23216): #3 main
package:signal/main.dart:7
E/flutter (23216): #4 _runMainZoned.. (dart:ui/hooks.dart:136:25)
E/flutter (23216): #5 _rootRun (dart:async/zone.dart:1186:13)
E/flutter (23216): #6 _CustomZone.run (dart:async/zone.dart:1090:19)
E/flutter (23216): #7 _runZoned (dart:async/zone.dart:1626:10)
E/flutter (23216): #8 runZonedGuarded (dart:async/zone.dart:1614:12)
E/flutter (23216): #9 _runMainZoned. (dart:ui/hooks.dart:132:5)
E/flutter (23216): #10 _delayEntrypointInvocation. (dart:isolate-patch/isolate_patch.dart:283:19)
E/flutter (23216): #11 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:184:12)

This is the code

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';

void main() {
  install();
  runApp(MyApp());
}

void install() {
  var identityKeyPair = KeyHelper.generateIdentityKeyPair();
  var registerationId = KeyHelper.generateRegistrationId(false);

  var preKeys = KeyHelper.generatePreKeys(0, 110);

  var signedPreKey = KeyHelper.generateSignedPreKey(identityKeyPair, 0);

  // ignore: unused_local_variable
  var sessionStore = InMemorySessionStore();
  var preKeyStore = InMemoryPreKeyStore();
  var signedPreKeyStore = InMemorySignedPreKeyStore();
  // ignore: unused_local_variable
  var identityStore =
      InMemoryIdentityKeyStore(identityKeyPair, registerationId);

  for (var p in preKeys) {
    preKeyStore.storePreKey(p.id, p);
  }
  signedPreKeyStore.storeSignedPreKey(signedPreKey.id, signedPreKey);

  var remoteAddress = SignalProtocolAddress("remote", 1);
  var sessionBuilder = SessionBuilder(sessionStore, preKeyStore,
      signedPreKeyStore, identityStore, remoteAddress);

  // sessionBuilder.processPreKeyBundle(retrievedPreKey);

  var sessionCipher = SessionCipher(sessionStore, preKeyStore,
      signedPreKeyStore, identityStore, remoteAddress);
  var ciphertext = sessionCipher.encrypt(utf8.encode("Hello Mixin"));

  print(ciphertext);
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'signal protocall',
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: groupSessioin,
        tooltip: "clickme",
        child: Icon(Icons.add),
      ),
    );
  }

  void groupSessioin() {
    var senderKeyName = SenderKeyName("", SignalProtocolAddress("sender", 1));
    var senderKeyStore = InMemorySenderKeyStore();
    var groupSession = GroupCipher(senderKeyStore, senderKeyName);
    print(groupSession.encrypt(utf8.encode("Hello Mixin")).toString());
  }
}

[xni06]

It doesn't look like the example app works - see #24

However, the unit tests do work and it is from those that I figured out how to integrate the library into my Flutter app and to also use Firebase as the Serverless backend.

Take a look at how the library has been used in the following tests:

• session_cipher_test.dart
• session_builder_test.dart

MacBook:libsignal_protocol_dart$ dart test test/session_builder_test.dart 
00:09 +3: All tests passed!              
                                                                                                                                   
MacBook:libsignal_protocol_dart$ dart test test/session_cipher_test.dart 
00:06 +1: testMessageKeyLimits                                                                                                                                              
  Skip: Failing historical test
00:06 +1 ~1: All tests passed!     

[woinbo]

It doesn't look like the example app works - see #24

However, the unit tests do work and it is from those that I figured out how to integrate the library into my Flutter app and to also use Firebase as the Serverless backend.

Take a look at how the library has been used in the following tests:

• session_cipher_test.dart
• session_builder_test.dart

MacBook:libsignal_protocol_dart$ dart test test/session_builder_test.dart 
00:09 +3: All tests passed!              
                                                                                                                                   
MacBook:libsignal_protocol_dart$ dart test test/session_cipher_test.dart 
00:06 +1: testMessageKeyLimits                                                                                                                                              
  Skip: Failing historical test
00:06 +1 ~1: All tests passed!     

All tests pass! but then too it's giving the error. What should be done now ??

[xni06]

All tests pass! but then too it's giving the error. What should be done now ??

There's no error when the tests are run - there's an invalid test hence why it's been marked as being skipped.

Look at the runInteraction method in the above tests as they exchange messages in there.

In essence, all this library does is to provide you with the API calls to encrypt/decrypt messages in precisely the same way as its Java counterpart, libsignal-protocol-java.

To make use of these libraries, we have to do some leg work by looking at how the calls are made within the tests.

Once this has been understood, you can then write an SDK to make it easier for the app to consume. I've done this myself but I cannot share it with you as it's not yet open-source. If it were, it would make your life, and a lot of others, a hell of a lot easier!

[woinbo]

All tests pass! but then too it's giving the error. What should be done now ??

There's no error when the tests are run - there's an invalid test hence why it's been marked as being skipped.

Look at the runInteraction method in the above tests as they exchange messages in there.

In essence, all this library does is to provide you with the API calls to encrypt/decrypt messages in precisely the same way as its Java counterpart, libsignal-protocol-java.

To make use of these libraries, we have to do some leg work by looking at how the calls are made within the tests.

Once this has been understood, you can then write an SDK to make it easier for the app to consume. I've done this myself but I cannot share it with you as it's not yet open-source. If it were, it would make your life, and a lot of others, a hell of a lot easier!

please sir, do update the readme file or example on how to set up this as I really need signal e2e in my app. It's a humble request

[xni06]

please sir, do update the readme file or example on how to set up this as I really need signal e2e in my app. It's a humble request

It doesn't look like the example app works - see #24

Please add your comment to the issue linked above as I do not own this repository - I'm just a consumer like yourself.

[crossle]

@sky-flutter try the latest example

[woinbo]

I tried the latest example and tried to decrypt the "ciphertext", but it shows this error Instance of 'UntrustedIdentityException'

[woinbo]

I tried the latest example and tried to decrypt the "ciphertext", but it shows this error Instance of 'UntrustedIdentityException'

import 'dart:convert';
import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';

void main() {
  runApp(MyApp());
}

var ciphertext;

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  void install() {
    var identityKeyPair = KeyHelper.generateIdentityKeyPair();
    var registerationId = KeyHelper.generateRegistrationId(false);

    var preKeys = KeyHelper.generatePreKeys(0, 110);

    var signedPreKey = KeyHelper.generateSignedPreKey(identityKeyPair, 0);

    var sessionStore = InMemorySessionStore();
    var preKeyStore = InMemoryPreKeyStore();
    var signedPreKeyStore = InMemorySignedPreKeyStore();
    var identityStore =
        InMemoryIdentityKeyStore(identityKeyPair, registerationId);

    for (var p in preKeys) {
      preKeyStore.storePreKey(p.id, p);
    }
    signedPreKeyStore.storeSignedPreKey(signedPreKey.id, signedPreKey);

    var remoteAddress = SignalProtocolAddress('remote', 1);
    var sessionBuilder = SessionBuilder(sessionStore, preKeyStore,
        signedPreKeyStore, identityStore, remoteAddress);

    // Should get remote from the server
    var remoteRegId = KeyHelper.generateRegistrationId(false);
    var remoteIdentityKeyPair = KeyHelper.generateIdentityKeyPair();
    var remotePreKeys = KeyHelper.generatePreKeys(0, 110);
    var remoteSignedPreKey =
        KeyHelper.generateSignedPreKey(remoteIdentityKeyPair, 0);

    var retrievedPreKey = PreKeyBundle(
        remoteRegId,
        1,
        remotePreKeys[0].id,
        remotePreKeys[0].getKeyPair().publicKey,
        remoteSignedPreKey.id,
        remoteSignedPreKey.getKeyPair().publicKey,
        remoteSignedPreKey.signature,
        remoteIdentityKeyPair.getPublicKey());

    sessionBuilder.processPreKeyBundle(retrievedPreKey);

    var sessionCipher = SessionCipher(sessionStore, preKeyStore,
        signedPreKeyStore, identityStore, remoteAddress);
    setState(() {
      ciphertext =
          sessionCipher.encrypt(Uint8List.fromList(utf8.encode('Hello Mixin')));
    });

    PreKeySignalMessage preKeySignalMessage =
        PreKeySignalMessage(ciphertext.serialize());
    print(ciphertext.serialize());
    print((sessionCipher.decrypt(preKeySignalMessage)));
  }

  void groupSessioin() {
    var senderKeyName = SenderKeyName("", SignalProtocolAddress("sender", 1));
    var senderKeyStore = InMemorySenderKeyStore();
    var groupSession = GroupCipher(senderKeyStore, senderKeyName);
    groupSession.encrypt(Uint8List.fromList(utf8.encode('Hello Mixin')));
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: SafeArea(
          child: Container(
            child: Center(
              child: Column(
                children: [
                  Text(
                    ciphertext == null
                        ? "asd"
                        : ciphertext.serialize().toString(),
                  ),
                  TextButton(
                    onPressed: install,
                    child: Text("press me"),
                  )
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}

[xni06]

Take a look at this and work your way up the thread: #23 (comment)

[crossle]

c6326d1