Julius Joska
77 lines
2.7 KiB
Dart
77 lines
2.7 KiB
Dart
// Needs the native libsignal library (FFI); skipped on builders without it (--exclude-tags ffi).
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@Tags(['ffi'])
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import 'dart:typed_data';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:sepot/core/crypto/safety_number.dart';
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import 'package:sepot/core/crypto/sepot_crypto.dart';
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void main() {
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setUpAll(() async {
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await SepotCrypto.init();
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});
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Uint8List fixedKey(int seed) {
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// deterministický „privátní klíč" → veřejný přes libsignal derivaci
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final priv = Uint8List.fromList(List.generate(32, (i) => (i * 7 + seed) & 0xFF));
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return SepotCrypto.derivePublicKey(priv);
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}
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test('obě strany vidí stejné číslo (symetrie)', () {
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final a = fixedKey(1);
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final b = fixedKey(2);
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final fromA = SafetyNumber.compute(localIdentityKey: a, remoteIdentityKey: b);
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final fromB = SafetyNumber.compute(localIdentityKey: b, remoteIdentityKey: a);
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expect(fromA.display, fromB.display);
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});
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test('60 číslic, 12 bloků po 5', () {
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final n = SafetyNumber.compute(
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localIdentityKey: fixedKey(1),
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remoteIdentityKey: fixedKey(2),
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);
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expect(n.display, matches(RegExp(r'^\d{60}$')));
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expect(n.groups, hasLength(12));
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expect(n.groups.every((g) => g.length == 5), isTrue);
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});
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test('jiný pár klíčů = jiné číslo', () {
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final ab = SafetyNumber.compute(
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localIdentityKey: fixedKey(1), remoteIdentityKey: fixedKey(2));
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final ac = SafetyNumber.compute(
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localIdentityKey: fixedKey(1), remoteIdentityKey: fixedKey(3));
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expect(ab.display, isNot(ac.display));
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});
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test('QR compare: protistrany si odpovídají, cizí ne', () {
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final a = fixedKey(1);
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final b = fixedKey(2);
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final mine = SafetyNumber.compute(localIdentityKey: a, remoteIdentityKey: b);
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final theirs = SafetyNumber.compute(localIdentityKey: b, remoteIdentityKey: a);
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final stranger = SafetyNumber.compute(
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localIdentityKey: a, remoteIdentityKey: fixedKey(9));
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expect(SafetyNumber.compare(mine.scannable, theirs.scannable), isTrue);
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expect(SafetyNumber.compare(mine.scannable, stranger.scannable), isFalse);
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// vadný vstup nesmí spadnout
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expect(
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SafetyNumber.compare(mine.scannable, Uint8List.fromList([1, 2, 3])),
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isFalse,
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);
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});
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test('KAT: zafixovaný výstup — změna = breaking change pro uživatele', () {
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final n = SafetyNumber.compute(
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localIdentityKey: fixedKey(1),
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remoteIdentityKey: fixedKey(2),
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);
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// Vygenerováno libsignal 5.0.9 (iterations=5200, version=2,
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// identifier=BLAKE2b-256(pubkey)). Pokud tenhle test spadne po
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// upgradu, VŠEM uživatelům se změní safety numbers → stop ship.
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expect(
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n.display,
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'289143504470406742912626343937385761080203728630218051783783',
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);
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});
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}
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