Flutter Web URL Encryption

url_Encryption.dart

//This method uses encrypt:^5.0.1 package to encrypt the url
//Key and IV should be same for both encryption and decryption
//https://pub.dev/packages/encrypt

import 'package:encrypt/encrypt.dart' as encrypt;
import 'package:flutter/material.dart';

String enCryptURL(String url, {bool isrestoreRoute = false}) {
  //final Uri uri = Uri.parse(enCryptURL(routeInformation.location ?? ""));
  //return RouteInformation(location: enCryptURL(location, isrestoreRoute: true));
  RegExp base64 = RegExp(
      r'^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{4})$');
  final key = encrypt.Key.fromUtf8('FntDBmHdSpgtVBsLLtcNTQwu');
  final iv = encrypt.IV.fromLength(16);
  final encrypter =
      encrypt.Encrypter(encrypt.AES(key, mode: encrypt.AESMode.ctr, padding: null));
  String screen = url;
  try {
    if (isrestoreRoute) {
      screen = encrypter.encrypt(url, iv: iv).base64;
    } else {
      if (base64.hasMatch(url.replaceFirst("/", ""))) {
        screen =
            encrypter.decrypt(encrypt.Encrypted.from64(url.replaceFirst("/", "")), iv: iv);
      } else {
        screen = url;
      }
    }
  } catch (e) {
    debugPrintStack(label: "Error on enCryptURL :-> ${e.toString()}");
    screen = url;
  }
  debugPrintStack(
      label: "enCrypt url >>>key${key.base64}\n iv=>>${iv.base64} \n Screen==>> $screen");
  return screen;
}

String enCryptURLManual(String url, {bool isrestoreRoute = false}) {
  // final Uri uri = Uri.parse(enCryptURL(routeInformation.location ?? ""));
  // RouteInformation(location: enCryptURL(location, isrestoreRoute: true));
  Map<String, String> screenKeys = {
    "portfolioSummary": "CryptportfolioSummary",
    "dashboard": "dashboardCrypt"
  };
  final encryptedscreens = [];

  try {
    final screens = url.split("/");
    for (var element in screens) {
      if (isrestoreRoute) {
        screenKeys.containsKey(element)
            ? encryptedscreens.add(screenKeys[element])
            : encryptedscreens.add(element);
      } else {
        screenKeys.containsValue(element)
            ? encryptedscreens
                .add((screenKeys.keys.firstWhere((key) => screenKeys[key] == element)))
            : encryptedscreens.add(element);
      }
    }
    return Uri.tryParse(encryptedscreens.join("/")).toString();
  } catch (e) {
    debugPrintStack(label: "Error on enCryptURL :-> ${e.toString()}");
  }

  return encryptedscreens.join("/");
}

Example