omemo_dart/test/double_ratchet_test.dart

119 lines
3.3 KiB
Dart

import 'dart:convert';
import 'dart:developer';
import 'package:cryptography/cryptography.dart';
import 'package:omemo_dart/omemo_dart.dart';
import 'package:test/test.dart';
void main() {
test('Test the Double Ratchet', () async {
// Generate keys
const bobJid = 'bob@other.example.server';
final ikAlice = await OmemoKeyPair.generateNewPair(KeyPairType.ed25519);
final ikBob = await OmemoKeyPair.generateNewPair(KeyPairType.ed25519);
final spkBob = await OmemoKeyPair.generateNewPair(KeyPairType.x25519);
final opkBob = await OmemoKeyPair.generateNewPair(KeyPairType.x25519);
final bundleBob = OmemoBundle(
bobJid,
1,
await spkBob.pk.asBase64(),
3,
base64Encode(
await sig(ikBob, await spkBob.pk.getBytes()),
),
//'Q5in+/L4kJixEX692h6mJkPMyp4I3SlQ84L0E7ipPzqfPHOMiraUlqG2vG/O8wvFjLsKYZpPBraga9IvwhqVDA==',
await ikBob.pk.asBase64(),
{
2: await opkBob.pk.asBase64(),
},
);
// Alice does X3DH
final resultAlice = await x3dhFromBundle(bundleBob, ikAlice);
// Alice sends the inital message to Bob
// ...
// Bob does X3DH
final resultBob = await x3dhFromInitialMessage(
X3DHMessage(
ikAlice.pk,
resultAlice.ek.pk,
2,
),
spkBob,
opkBob,
ikBob,
);
log('X3DH key exchange done');
// Alice and Bob now share sk as a common secret and ad
// Build a session
final alicesRatchet = await OmemoDoubleRatchet.initiateNewSession(
spkBob.pk,
bundleBob.spkId,
ikBob.pk,
ikAlice.pk,
resultAlice.ek.pk,
resultAlice.sk,
resultAlice.ad,
0,
resultAlice.opkId,
);
final bobsRatchet = await OmemoDoubleRatchet.acceptNewSession(
spkBob,
bundleBob.spkId,
ikAlice.pk,
2,
resultAlice.ek.pk,
resultBob.sk,
resultBob.ad,
0,
);
expect(alicesRatchet.sessionAd, bobsRatchet.sessionAd);
for (var i = 0; i < 100; i++) {
final messageText = 'Hello, dear $i';
log('${i + 1}/100');
if (i.isEven) {
// Alice encrypts a message
final aliceRatchetResult =
await alicesRatchet.ratchetEncrypt(utf8.encode(messageText));
log('Alice sent the message');
// Alice sends it to Bob
// ...
// Bob tries to decrypt it
final bobRatchetResult = await bobsRatchet.ratchetDecrypt(
aliceRatchetResult,
);
log('Bob decrypted the message');
expect(bobRatchetResult.isType<List<int>>(), true);
expect(bobRatchetResult.get<List<int>>(), utf8.encode(messageText));
} else {
// Bob sends a message to Alice
final bobRatchetResult =
await bobsRatchet.ratchetEncrypt(utf8.encode(messageText));
log('Bob sent the message');
// Bobs sends it to Alice
// ...
// Alice tries to decrypt it
final aliceRatchetResult = await alicesRatchet.ratchetDecrypt(
bobRatchetResult,
);
log('Alice decrypted the message');
expect(aliceRatchetResult.isType<List<int>>(), true);
expect(aliceRatchetResult.get<List<int>>(), utf8.encode(messageText));
expect(utf8.encode(messageText), aliceRatchetResult.get<List<int>>());
}
}
});
}