yubioath-flutter/lib/oath/views/utils.dart
2023-08-16 15:27:31 +02:00

97 lines
2.9 KiB
Dart
Executable File

/*
* Copyright (C) 2022 Yubico.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import 'dart:math';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import '../../app/message.dart';
import '../../app/models.dart';
import '../../widgets/utf8_utils.dart';
import '../keys.dart';
import '../models.dart';
import 'add_account_page.dart';
import 'add_multi_account_page.dart';
/// Calculates the available space for issuer and account name.
///
/// Returns a record of the space available for the issuer and account name,
/// respectively, based on the current state of the credential.
(int, int) getRemainingKeySpace(
{required OathType oathType,
required int period,
required String issuer,
required String name}) {
int remaining = 64; // The field is 64 bytes in total.
if (oathType == OathType.totp && period != defaultPeriod) {
// Non-standard TOTP periods are stored as part of this data, as a "D/"- prefix.
remaining -= '$period/'.length;
}
int issuerSpace = byteLength(issuer);
if (issuer.isNotEmpty) {
// Issuer is separated from name with a ":", if present.
issuerSpace += 1;
}
return (
// Always reserve at least one character for name
remaining - 1 - max(byteLength(name), 1),
remaining - issuerSpace,
);
}
/// Gets a textual name for the account, based on the issuer and name.
String getTextName(OathCredential credential) {
return credential.issuer != null
? '${credential.issuer} (${credential.name})'
: credential.name;
}
void handleUri(
final withContext,
final credentials,
String? uri,
DevicePath? devicePath,
OathState? state,
AppLocalizations l10n,
) async {
List<CredentialData> creds =
uri != null ? CredentialData.fromUri(Uri.parse(uri)) : [];
await withContext((context) async {
if (creds.isEmpty) {
showMessage(context, l10n.l_qr_not_found);
} else if (creds.length == 1) {
await showBlurDialog(
context: context,
builder: (context) => OathAddAccountPage(
devicePath,
state,
credentials: credentials,
credentialData: creds[0],
),
);
} else {
await showBlurDialog(
context: context,
builder: (context) => OathAddMultiAccountPage(devicePath, state, creds,
key: migrateAccountAction),
);
}
});
}