Remove password encryption (#1259)

uni/lib/controller/local_storage/preferences_controller.dart

@@ -1,7 +1,6 @@
 import 'dart:async';
 import 'dart:io';
 
-import 'package:encrypt/encrypt.dart' as encrypt;
 import 'package:flutter/material.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:shared_preferences/shared_preferences.dart';
@@ -17,10 +16,6 @@ import 'package:uni/utils/favorite_widget_type.dart';
 class PreferencesController {
   static late SharedPreferences prefs;
 
-  static final iv = encrypt.IV.fromBase64('jF9jjdSEPgsKnf0jCl1GAQ==');
-  static final key =
-      encrypt.Key.fromBase64('DT3/GTNYldhwOD3ZbpVLoAwA/mncsN7U7sJxfFn3y0A=');
-
   static const _lastUpdateTimeKeySuffix = '_last_update_time';
   static const String _userNumber = 'user_number';
   static const String _userPw = 'user_password';
@@ -79,7 +74,7 @@ class PreferencesController {
     List<String> faculties,
   ) async {
     await _secureStorage.write(key: _userNumber, value: user);
-    await _secureStorage.write(key: _userPw, value: encode(pass));
+    await _secureStorage.write(key: _userPw, value: pass);
     await prefs.setStringList(
       _userFaculties,
       faculties,
@@ -195,9 +190,8 @@ class PreferencesController {
   }
 
   /// Returns the user's password, in plain text format.
-  static Future<String?> getUserPassword() async {
-    final password = await _secureStorage.read(key: _userPw);
-    return password != null ? decode(password) : null;
+  static Future<String?> getUserPassword() {
+    return _secureStorage.read(key: _userPw);
   }
 
   /// Replaces the user's favorite widgets with [newFavorites].
@@ -273,24 +267,6 @@ class PreferencesController {
     );
   }
 
-  /// Encrypts [plainText] and returns its base64 representation.
-  static String encode(String plainText) {
-    final encrypter = _createEncrypter();
-    return encrypter.encrypt(plainText, iv: iv).base64;
-  }
-
-  /// Decrypts [base64Text].
-  static String? decode(String base64Text) {
-    final encrypter = _createEncrypter();
-    return encrypter.decrypt64(base64Text, iv: iv);
-  }
-
-  /// Creates an [encrypt.Encrypter] for encrypting and decrypting the user's
-  /// password.
-  static encrypt.Encrypter _createEncrypter() {
-    return encrypt.Encrypter(encrypt.AES(key));
-  }
-
   static bool getTuitionNotificationToggle() {
     return prefs.getBool(_tuitionNotificationsToggleKey) ?? true;
   }

uni/pubspec.lock

@@ -57,14 +57,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.4.2"
-  asn1lib:
-    dependency: transitive
-    description:
-      name: asn1lib
-      sha256: c9c85fedbe2188b95133cbe960e16f5f448860f7133330e272edbbca5893ddc6
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.5.2"
   async:
     dependency: transitive
     description:
@@ -361,14 +353,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.17"
-  encrypt:
-    dependency: "direct main"
-    description:
-      name: encrypt
-      sha256: "62d9aa4670cc2a8798bab89b39fc71b6dfbacf615de6cf5001fb39f7e4a996a2"
-      url: "https://pub.dev"
-    source: hosted
-    version: "5.0.3"
   expansion_tile_card:
     dependency: "direct main"
     description:

uni/pubspec.yaml

@@ -24,7 +24,6 @@ dependencies:
   currency_text_input_formatter: ^2.1.5
   diacritic: ^0.1.5
   email_validator: ^2.0.1
-  encrypt: ^5.0.3
   expansion_tile_card: ^3.0.0
   flutter:
     sdk: flutter