omemo_dart/test/omemo_test.dart

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2022-08-04 14:30:09 +00:00
import 'dart:convert';
import 'package:omemo_dart/omemo_dart.dart';
import 'package:test/test.dart';
void main() {
test('Test using OMEMO sessions with only one device per user', () async {
const aliceJid = 'alice@server.example';
const bobJid = 'bob@other.server.example';
// Alice and Bob generate their sessions
final aliceSession = await OmemoSessionManager.generateNewIdentity(opkAmount: 1);
final bobSession = await OmemoSessionManager.generateNewIdentity(opkAmount: 1);
// Perform the X3DH
final x3dhAliceResult = await x3dhFromBundle(
await bobSession.device.toBundle(),
aliceSession.device.ik,
);
final x3dhBobResult = await x3dhFromInitialMessage(
X3DHMessage(
aliceSession.device.ik.pk,
x3dhAliceResult.ek.pk,
'2',
),
bobSession.device.spk,
bobSession.device.opks.values.elementAt(0),
bobSession.device.ik,
);
// Build the ratchets
final aliceRatchet = await OmemoDoubleRatchet.initiateNewSession(
bobSession.device.spk.pk,
x3dhAliceResult.sk,
x3dhAliceResult.ad,
);
final bobRatchet = await OmemoDoubleRatchet.acceptNewSession(
bobSession.device.spk,
x3dhBobResult.sk,
x3dhBobResult.ad,
);
// Add the ratchets to the session managers
await aliceSession.addSession(bobJid, bobSession.device.id, aliceRatchet);
await bobSession.addSession(aliceJid, aliceSession.device.id, bobRatchet);
// Alice encrypts a message for Bob
const messagePlaintext = 'Hello Bob!';
final aliceMessage = await aliceSession.encryptToJid(bobJid, messagePlaintext);
expect(aliceMessage.encryptedKeys.length, 1);
// Alice sends the message to Bob
// ...
// Bob decrypts it
final bobMessage = await bobSession.decryptMessage(
aliceMessage.ciphertext,
aliceJid,
aliceSession.device.id,
[
EncryptedKey(
bobSession.device.id,
base64.encode(aliceMessage.encryptedKeys[bobSession.device.id]!),
),
],
);
expect(messagePlaintext, bobMessage);
});
}