79 lines
1.9 KiB
Dart
79 lines
1.9 KiB
Dart
import 'package:ente_auth/models/code.dart';
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import 'package:flutter/foundation.dart';
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import 'package:otp/otp.dart' as otp;
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import 'package:steam_totp/steam_totp.dart';
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String getOTP(Code code) {
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if (code.type == Type.steam) {
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return _getSteamCode(code);
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}
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if (code.type == Type.hotp) {
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return _getHOTPCode(code);
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}
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return otp.OTP.generateTOTPCodeString(
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getSanitizedSecret(code.secret),
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DateTime.now().millisecondsSinceEpoch,
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length: code.digits,
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interval: code.period,
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algorithm: _getAlgorithm(code),
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isGoogle: true,
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);
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}
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String _getHOTPCode(Code code) {
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return otp.OTP.generateHOTPCodeString(
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getSanitizedSecret(code.secret),
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code.counter,
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length: code.digits,
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algorithm: _getAlgorithm(code),
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isGoogle: true,
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);
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}
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String _getSteamCode(Code code, [bool isNext = false]) {
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final SteamTOTP steamtotp = SteamTOTP(secret: code.secret);
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return steamtotp.generate(
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DateTime.now().millisecondsSinceEpoch ~/ 1000 + (isNext ? code.period : 0),
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);
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}
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String getNextTotp(Code code) {
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if (code.type == Type.steam) {
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return _getSteamCode(code, true);
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}
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return otp.OTP.generateTOTPCodeString(
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getSanitizedSecret(code.secret),
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DateTime.now().millisecondsSinceEpoch + code.period * 1000,
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length: code.digits,
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interval: code.period,
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algorithm: _getAlgorithm(code),
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isGoogle: true,
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);
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}
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otp.Algorithm _getAlgorithm(Code code) {
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switch (code.algorithm) {
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case Algorithm.sha256:
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return otp.Algorithm.SHA256;
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case Algorithm.sha512:
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return otp.Algorithm.SHA512;
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default:
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return otp.Algorithm.SHA1;
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}
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}
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String getSanitizedSecret(String secret) {
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return secret.toUpperCase().trim().replaceAll(' ', '');
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}
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String safeDecode(String value) {
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try {
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return Uri.decodeComponent(value);
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} catch (e) {
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// note: don't log the value, it might contain sensitive information
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debugPrint("Failed to decode $e");
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return value;
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}
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}
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