cake_wallet/lib/core/auth_service.dart

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import 'dart:async';
import 'package:cake_wallet/core/secure_storage.dart';
import 'package:cake_wallet/core/totp_request_details.dart';
import 'package:cake_wallet/routes.dart';
import 'package:cake_wallet/src/screens/auth/auth_page.dart';
import 'package:flutter/material.dart';
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import 'package:mobx/mobx.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'package:cake_wallet/entities/preferences_key.dart';
import 'package:cake_wallet/entities/secret_store_key.dart';
import 'package:cake_wallet/entities/encrypt.dart';
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import 'package:cake_wallet/store/settings_store.dart';
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import '../src/screens/setup_2fa/setup_2fa_enter_code_page.dart';
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class AuthService with Store {
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AuthService({
required this.secureStorage,
required this.sharedPreferences,
required this.settingsStore,
});
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static const List<String> _alwaysAuthenticateRoutes = [
Routes.showKeys,
Routes.backup,
Routes.setupPin,
Routes.setup_2faPage,
Routes.modify2FAPage,
Routes.newWallet,
Routes.newWalletType,
Routes.addressBookAddContact,
Routes.restoreOptions,
];
final SecureStorage secureStorage;
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final SharedPreferences sharedPreferences;
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final SettingsStore settingsStore;
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Future<void> setPassword(String password) async {
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final key = generateStoreKeyFor(key: SecretStoreKey.pinCodePassword);
final encodedPassword = encodedPinCode(pin: password);
await secureStorage.write(key: key, value: encodedPassword);
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}
Future<bool> canAuthenticate() async {
final key = generateStoreKeyFor(key: SecretStoreKey.pinCodePassword);
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final walletName = sharedPreferences.getString(PreferencesKey.currentWalletName) ?? '';
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var password = '';
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try {
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password = await secureStorage.read(key: key) ?? '';
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} catch (e) {
print(e);
}
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return walletName.isNotEmpty && password.isNotEmpty;
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}
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Future<bool> authenticate(String pin) async {
final key = generateStoreKeyFor(key: SecretStoreKey.pinCodePassword);
final encodedPin = await secureStorage.read(key: key);
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final decodedPin = decodedPinCode(pin: encodedPin!);
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return decodedPin == pin;
}
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void saveLastAuthTime() {
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int timestamp = DateTime.now().millisecondsSinceEpoch;
secureStorage.write(key: SecureKey.lastAuthTimeMilliseconds, value: timestamp.toString());
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}
Future<bool> requireAuth() async {
final timestamp =
int.tryParse(await secureStorage.read(key: SecureKey.lastAuthTimeMilliseconds) ?? '0');
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final duration = _durationToRequireAuth(timestamp ?? 0);
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final requiredPinInterval = settingsStore.pinTimeOutDuration;
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return duration >= requiredPinInterval.value;
}
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int _durationToRequireAuth(int timestamp) {
DateTime before = DateTime.fromMillisecondsSinceEpoch(timestamp);
DateTime now = DateTime.now();
Duration timeDifference = now.difference(before);
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return timeDifference.inMinutes;
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}
Future<void> authenticateAction(BuildContext context,
{Function(bool)? onAuthSuccess,
String? route,
Object? arguments,
required bool conditionToDetermineIfToUse2FA}) async {
assert(route != null || onAuthSuccess != null,
'Either route or onAuthSuccess param must be passed.');
if (!conditionToDetermineIfToUse2FA) {
if (!(await requireAuth()) && !_alwaysAuthenticateRoutes.contains(route)) {
if (onAuthSuccess != null) {
onAuthSuccess(true);
} else {
Navigator.of(context).pushNamed(
route ?? '',
arguments: arguments,
);
}
return;
}
}
Navigator.of(context).pushNamed(Routes.auth,
arguments: (bool isAuthenticatedSuccessfully, AuthPageState auth) async {
if (!isAuthenticatedSuccessfully) {
onAuthSuccess?.call(false);
return;
} else {
if (settingsStore.useTOTP2FA && conditionToDetermineIfToUse2FA) {
auth.close(
route: Routes.totpAuthCodePage,
arguments: TotpAuthArgumentsModel(
isForSetup: !settingsStore.useTOTP2FA,
onTotpAuthenticationFinished:
(bool isAuthenticatedSuccessfully, TotpAuthCodePageState totpAuth) async {
if (!isAuthenticatedSuccessfully) {
onAuthSuccess?.call(false);
return;
}
if (onAuthSuccess != null) {
totpAuth.close().then((value) => onAuthSuccess.call(true));
} else {
totpAuth.close(route: route, arguments: arguments);
}
},
),
);
} else {
if (onAuthSuccess != null) {
auth.close().then((value) => onAuthSuccess.call(true));
} else {
auth.close(route: route, arguments: arguments);
}
}
}
});
}
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}