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Šepot — end-to-end encrypted messenger

Browse Source 
Initial public release. Anonymous on-device identity (no phone number,
e-mail, or password), Signal-protocol cryptography (X3DH + PQXDH, Double
Ratchet, sealed sender) via libsignal, a metadata-minimizing relay,
group chats, disappearing messages, encrypted local storage, optional
Tor transport, and a UI localized into Czech, English, German, Russian,
and Italian.

Monorepo: Flutter client (app/), Rust relay + wire types (rust/),
protobuf definitions (proto/), self-host deploy (deploy/).

Licensed under AGPL-3.0 with an app-store distribution exception (§7).
This commit is contained in:
Julius Joska
2026-07-11 17:06:39 +02:00
commit 8081d98c67
309 changed files with 44102 additions and 0 deletions
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app/lib/features/auth/pin_setup_screen.dart
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import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:sepot/core/l10n/l10n.dart';
import 'package:sepot/core/theme/app_theme.dart';
import 'package:sepot/providers/storage_provider.dart';
/// Nastavení PINu (6 číslic)
class PinSetupScreen extends ConsumerStatefulWidget {
const PinSetupScreen({super.key});
@override
ConsumerState<PinSetupScreen> createState() => _PinSetupScreenState();
}
class _PinSetupScreenState extends ConsumerState<PinSetupScreen> {
String _pin = '';
String? _firstPin;
bool _isConfirming = false;
bool _isSaving = false;
String? _error;
@override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Padding(
padding: const EdgeInsets.all(32),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
width: 64,
height: 64,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: SepotColors.ember.withValues(alpha: 0.1),
),
child: const Icon(
Icons.pin_rounded,
size: 32,
color: SepotColors.ember,
),
),
const SizedBox(height: 24),
Text(
_isConfirming
? context.l10n.pinConfirmTitle
: context.l10n.pinSetupTitle,
style: const TextStyle(
fontFamily: kFontSans,
fontSize: 24,
fontWeight: FontWeight.w700,
color: SepotColors.textPrimary,
),
),
const SizedBox(height: 8),
Text(
_isConfirming
? context.l10n.pinConfirmSubtitle
: context.l10n.pinSetupSubtitle,
style: const TextStyle(
fontSize: 14,
color: SepotColors.textSecondary,
),
),
const SizedBox(height: 48),
// PIN tečky
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: List.generate(6, (i) {
return Container(
width: 16,
height: 16,
margin: const EdgeInsets.symmetric(horizontal: 8),
decoration: BoxDecoration(
shape: BoxShape.circle,
color: i < _pin.length
? SepotColors.ember
: SepotColors.border,
border: Border.all(
color: i < _pin.length
? SepotColors.ember
: SepotColors.border,
width: 2,
),
),
);
}),
),
if (_error != null) ...[
const SizedBox(height: 16),
Text(
_error!,
style: const TextStyle(
color: SepotColors.error,
fontSize: 14,
),
),
],
if (_isSaving) ...[
const SizedBox(height: 16),
// Argon2id wrap DEK běží (~sekundy, memory-hard záměrně)
const SizedBox(
width: 20,
height: 20,
child: CircularProgressIndicator(
strokeWidth: 2,
color: SepotColors.ember,
),
),
],
const SizedBox(height: 48),
// Numerická klávesnice
_buildNumpad(),
],
),
),
),
);
}
Widget _buildNumpad() {
return Column(
children: [
for (final row in [
['1', '2', '3'],
['4', '5', '6'],
['7', '8', '9'],
['', '0', 'DEL'],
])
Padding(
padding: const EdgeInsets.symmetric(vertical: 8),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: row.map((key) {
if (key.isEmpty) {
return const SizedBox(width: 80, height: 64);
}
return _buildKey(key);
}).toList(),
),
),
],
);
}
Widget _buildKey(String key) {
final isDelete = key == 'DEL';
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 12),
child: InkWell(
onTap: () => _onKeyPress(key),
borderRadius: BorderRadius.circular(32),
child: Container(
width: 64,
height: 64,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: isDelete
? Colors.transparent
: SepotColors.surfaceVariant,
border: isDelete
? null
: Border.all(color: SepotColors.border),
),
child: Center(
child: isDelete
? const Icon(
Icons.backspace_outlined,
color: SepotColors.textSecondary,
size: 24,
)
: Text(
key,
style: const TextStyle(
fontFamily: kFontSans,
fontSize: 24,
fontWeight: FontWeight.w500,
color: SepotColors.textPrimary,
),
),
),
),
),
);
}
void _onKeyPress(String key) {
if (_isSaving) return;
HapticFeedback.lightImpact();
setState(() {
_error = null;
if (key == 'DEL') {
if (_pin.isNotEmpty) {
_pin = _pin.substring(0, _pin.length - 1);
}
} else if (_pin.length < 6) {
_pin += key;
if (_pin.length == 6) {
_onPinComplete();
}
}
});
}
Future<void> _onPinComplete() async {
if (_firstPin == null) {
// První zadání PINu
setState(() {
_firstPin = _pin;
_pin = '';
_isConfirming = true;
});
} else {
// Potvrzení PINu
if (_pin == _firstPin) {
// PINy se shodují — zabal DEK za Argon2id(PIN); od téhle chvíle
// je PIN klíčem k databázi, ne vizuálním zámkem
setState(() => _isSaving = true);
try {
await ref.read(storageProvider).enablePin(_pin);
} catch (e) {
setState(() {
_error = context.l10n.pinSetupFailed;
_pin = '';
_firstPin = null;
_isConfirming = false;
_isSaving = false;
});
return;
}
if (mounted) {
context.go('/chats');
}
} else {
// PINy se neshodují
setState(() {
_error = context.l10n.pinMismatchRetry;
_pin = '';
_firstPin = null;
_isConfirming = false;
});
}
}
}
}