371 lines
11 KiB
Dart
371 lines
11 KiB
Dart
import 'package:omemo_dart/omemo_dart.dart';
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import 'package:omemo_dart/src/trust/always.dart';
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import 'package:omemo_dart/src/trust/never.dart';
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import 'package:test/test.dart';
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void main() {
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test('Test using OMEMO sessions with only one device per user', () async {
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const aliceJid = 'alice@server.example';
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const bobJid = 'bob@other.server.example';
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// Alice and Bob generate their sessions
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var deviceModified = false;
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var ratchetModified = 0;
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var deviceMapModified = 0;
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final aliceSession = await OmemoSessionManager.generateNewIdentity(
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aliceJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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final bobSession = await OmemoSessionManager.generateNewIdentity(
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bobJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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final bobOpks = (await bobSession.getDevice()).opks.values.toList();
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bobSession.eventStream.listen((event) {
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if (event is DeviceModifiedEvent) {
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deviceModified = true;
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} else if (event is RatchetModifiedEvent) {
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ratchetModified++;
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} else if (event is DeviceMapModifiedEvent) {
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deviceMapModified++;
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}
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});
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// Alice encrypts a message for Bob
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const messagePlaintext = 'Hello Bob!';
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final aliceMessage = await aliceSession.encryptToJid(
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bobJid,
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messagePlaintext,
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newSessions: [
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await (await bobSession.getDevice()).toBundle(),
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],
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);
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expect(aliceMessage.encryptedKeys.length, 1);
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// Alice sends the message to Bob
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// ...
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// Bob decrypts it
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final bobMessage = await bobSession.decryptMessage(
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aliceMessage.ciphertext,
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aliceJid,
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(await aliceSession.getDevice()).id,
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aliceMessage.encryptedKeys,
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);
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expect(messagePlaintext, bobMessage);
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// The ratchet should be modified two times: Once for when the ratchet is created and
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// other time for when the message is decrypted
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expect(ratchetModified, 2);
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// Bob's device map should be modified once
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expect(deviceMapModified, 1);
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// The event should be triggered
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expect(deviceModified, true);
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// Bob should have replaced his OPK
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expect(
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listsEqual(bobOpks, (await bobSession.getDevice()).opks.values.toList()),
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false,
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);
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// Bob responds to Alice
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const bobResponseText = 'Oh, hello Alice!';
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final bobResponseMessage = await bobSession.encryptToJid(
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aliceJid,
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bobResponseText,
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);
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// Bob sends the message to Alice
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// ...
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// Alice decrypts it
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final aliceReceivedMessage = await aliceSession.decryptMessage(
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bobResponseMessage.ciphertext,
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bobJid,
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(await bobSession.getDevice()).id,
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bobResponseMessage.encryptedKeys,
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);
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expect(bobResponseText, aliceReceivedMessage);
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});
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test('Test using OMEMO sessions with only two devices for the receiver', () async {
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const aliceJid = 'alice@server.example';
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const bobJid = 'bob@other.server.example';
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// Alice and Bob generate their sessions
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final aliceSession = await OmemoSessionManager.generateNewIdentity(
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aliceJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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final bobSession = await OmemoSessionManager.generateNewIdentity(
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bobJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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// Bob's other device
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final bobSession2 = await OmemoSessionManager.generateNewIdentity(
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bobJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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// Alice encrypts a message for Bob
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const messagePlaintext = 'Hello Bob!';
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final aliceMessage = await aliceSession.encryptToJid(
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bobJid,
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messagePlaintext,
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newSessions: [
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await (await bobSession.getDevice()).toBundle(),
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await (await bobSession2.getDevice()).toBundle(),
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],
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);
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expect(aliceMessage.encryptedKeys.length, 2);
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expect(aliceMessage.encryptedKeys[0].kex, true);
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expect(aliceMessage.encryptedKeys[1].kex, true);
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// Alice sends the message to Bob
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// ...
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// Bob decrypts it
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final bobMessage = await bobSession.decryptMessage(
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aliceMessage.ciphertext,
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aliceJid,
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(await aliceSession.getDevice()).id,
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aliceMessage.encryptedKeys,
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);
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expect(messagePlaintext, bobMessage);
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// Bob responds to Alice
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const bobResponseText = 'Oh, hello Alice!';
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final bobResponseMessage = await bobSession.encryptToJid(
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aliceJid,
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bobResponseText,
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);
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// Bob sends the message to Alice
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// ...
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// Alice decrypts it
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final aliceReceivedMessage = await aliceSession.decryptMessage(
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bobResponseMessage.ciphertext,
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bobJid,
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(await bobSession.getDevice()).id,
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bobResponseMessage.encryptedKeys,
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);
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expect(bobResponseText, aliceReceivedMessage);
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// Alice checks the fingerprints
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final fingerprints = await aliceSession.getHexFingerprintsForJid(bobJid);
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// Check that they the fingerprints are correct
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expect(fingerprints.length, 2);
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expect(fingerprints[0] != fingerprints[1], true);
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// Check that those two calls do not throw an exception
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aliceSession
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..getRatchet(bobJid, fingerprints[0].deviceId)
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..getRatchet(bobJid, fingerprints[1].deviceId);
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});
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test('Test using OMEMO sessions with encrypt to self', () async {
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const aliceJid = 'alice@server.example';
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const bobJid = 'bob@other.server.example';
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// Alice and Bob generate their sessions
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final aliceSession1 = await OmemoSessionManager.generateNewIdentity(
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aliceJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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final aliceSession2 = await OmemoSessionManager.generateNewIdentity(
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aliceJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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final bobSession = await OmemoSessionManager.generateNewIdentity(
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bobJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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// Alice encrypts a message for Bob
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const messagePlaintext = 'Hello Bob!';
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final aliceMessage = await aliceSession1.encryptToJids(
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[bobJid, aliceJid],
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messagePlaintext,
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newSessions: [
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await (await bobSession.getDevice()).toBundle(),
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await (await aliceSession2.getDevice()).toBundle(),
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],
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);
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expect(aliceMessage.encryptedKeys.length, 2);
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// Alice sends the message to Bob
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// ...
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// Bob decrypts it
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final bobMessage = await bobSession.decryptMessage(
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aliceMessage.ciphertext,
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aliceJid,
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(await aliceSession1.getDevice()).id,
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aliceMessage.encryptedKeys,
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);
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expect(messagePlaintext, bobMessage);
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// Alice's other device decrypts it
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final aliceMessage2 = await aliceSession2.decryptMessage(
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aliceMessage.ciphertext,
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aliceJid,
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(await aliceSession1.getDevice()).id,
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aliceMessage.encryptedKeys,
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);
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expect(messagePlaintext, aliceMessage2);
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});
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test('Test using sending empty OMEMO messages', () async {
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const aliceJid = 'alice@server.example';
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const bobJid = 'bob@other.server.example';
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// Alice and Bob generate their sessions
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final aliceSession = await OmemoSessionManager.generateNewIdentity(
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aliceJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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final bobSession = await OmemoSessionManager.generateNewIdentity(
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bobJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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// Alice encrypts a message for Bob
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final aliceMessage = await aliceSession.encryptToJid(
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bobJid,
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null,
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newSessions: [
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await (await bobSession.getDevice()).toBundle(),
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],
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);
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expect(aliceMessage.encryptedKeys.length, 1);
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expect(aliceMessage.ciphertext, null);
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// Alice sends the message to Bob
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// ...
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// Bob decrypts it
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final bobMessage = await bobSession.decryptMessage(
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aliceMessage.ciphertext,
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aliceJid,
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(await aliceSession.getDevice()).id,
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aliceMessage.encryptedKeys,
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);
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expect(bobMessage, null);
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// This call must not cause an exception
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bobSession.getRatchet(aliceJid, (await aliceSession.getDevice()).id);
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});
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test('Test rotating the Signed Prekey', () async {
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// Generate the session
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const aliceJid = 'alice@some.server';
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final aliceSession = await OmemoSessionManager.generateNewIdentity(
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aliceJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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// Setup an event listener
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final oldDevice = await aliceSession.getDevice();
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Device? newDevice;
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aliceSession.eventStream.listen((event) {
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if (event is DeviceModifiedEvent) {
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newDevice = event.device;
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}
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});
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// Rotate the Signed Prekey
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await aliceSession.rotateSignedPrekey();
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// Just for safety...
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await Future<void>.delayed(const Duration(seconds: 2));
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expect(await oldDevice.equals(newDevice!), false);
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expect(await newDevice!.equals(await aliceSession.getDevice()), true);
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expect(await newDevice!.oldSpk!.equals(oldDevice.spk), true);
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expect(newDevice!.oldSpkId, oldDevice.spkId);
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});
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test('Test accepting a session with an old SPK', () async {
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const aliceJid = 'alice@server.example';
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const bobJid = 'bob@other.server.example';
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// Alice and Bob generate their sessions
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final aliceSession = await OmemoSessionManager.generateNewIdentity(
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aliceJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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final bobSession = await OmemoSessionManager.generateNewIdentity(
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bobJid,
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AlwaysTrustingTrustManager(),
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opkAmount: 1,
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);
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// Alice encrypts a message for Bob
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const messagePlaintext = 'Hello Bob!';
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final aliceMessage = await aliceSession.encryptToJid(
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bobJid,
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messagePlaintext,
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newSessions: [
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await (await bobSession.getDevice()).toBundle(),
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],
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);
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expect(aliceMessage.encryptedKeys.length, 1);
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// Alice loses her Internet connection. Bob rotates his SPK.
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await bobSession.rotateSignedPrekey();
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// Alice regains her Internet connection and sends the message to Bob
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// ...
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// Bob decrypts it
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final bobMessage = await bobSession.decryptMessage(
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aliceMessage.ciphertext,
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aliceJid,
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(await aliceSession.getDevice()).id,
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aliceMessage.encryptedKeys,
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);
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expect(messagePlaintext, bobMessage);
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});
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test('Test trust bypassing with empty OMEMO messages', () async {
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const aliceJid = 'alice@server.example';
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const bobJid = 'bob@other.server.example';
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// Alice and Bob generate their sessions
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final aliceSession = await OmemoSessionManager.generateNewIdentity(
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aliceJid,
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NeverTrustingTrustManager(),
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opkAmount: 1,
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);
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final bobSession = await OmemoSessionManager.generateNewIdentity(
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bobJid,
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NeverTrustingTrustManager(),
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opkAmount: 1,
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);
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// Alice encrypts an empty message for Bob
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final aliceMessage = await aliceSession.encryptToJid(
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bobJid,
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null,
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newSessions: [
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await (await bobSession.getDevice()).toBundle(),
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],
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);
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// Despite Alice not trusting Bob's device, we should have encrypted it for his
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// untrusted device.
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expect(aliceMessage.encryptedKeys.length, 1);
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});
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}
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