home,signin,login view and ol logik

lib/helper/helper.dart

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+
+
+import 'package:intl/intl.dart';
+
+/// Retrieves the current date in the format "yyyy-MM-dd".
+///
+/// @return [String] A formatted date.
+String getCurrentDate(DateTime date) {
+  return DateFormat("yyyy-MM-dd").format(date);
+}
+
+var kListDropDownYear = <int>[
+  for (var year = DateTime.now().year; year >= 2020; year--) year
+]; 
+
+var kCurrentUserIdentId = '';

lib/helper/http_override.dart

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+import 'dart:io';
+
+class MyHttpOverrides extends HttpOverrides {
+  @override
+  HttpClient createHttpClient(SecurityContext? context) {
+    return super.createHttpClient(context)
+      ..badCertificateCallback =
+          (X509Certificate cert, String host, int port) => true;
+  }
+}

lib/helper/password_helper.dart

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+import 'dart:convert';
+import 'dart:math';
+
+import 'package:cryptography/cryptography.dart';
+
+class PasswordHelper {
+  static const int _saltLength = 16;
+  static const int _hashLength = 32;
+
+  // 19 MiB, laut aktueller cryptography-Doku ein sinnvoller Startwert.
+  static const int _memory = 19 * 1024;
+  static const int _iterations = 2;
+  static const int _parallelism = 1;
+
+  static final Argon2id _algorithm = Argon2id(
+    memory: _memory,
+    iterations: _iterations,
+    parallelism: _parallelism,
+    hashLength: _hashLength,
+  );
+
+  /// Erstellt einen neuen Passwort-Hash inklusive zufälligem Salt.
+  ///
+  /// Rückgabeformat:
+  /// argon2id$memory$iterations$parallelism$saltBase64$hashBase64
+  static Future<String> hashPassword(String password) async {
+    final salt = _generateSalt(_saltLength);
+
+    final secretKey = await _algorithm.deriveKeyFromPassword(
+      password: password,
+      nonce: salt,
+    );
+
+    final hashBytes = await secretKey.extractBytes();
+
+    final saltBase64 = base64UrlEncode(salt);
+    final hashBase64 = base64UrlEncode(hashBytes);
+
+    return 'argon2id'
+        '\$$_memory'
+        '\$$_iterations'
+        '\$$_parallelism'
+        '\$$saltBase64'
+        '\$$hashBase64';
+  }
+
+  /// Prüft ein Klartext-Passwort gegen den gespeicherten Hash.
+  static Future<bool> verifyPassword(
+    String password,
+    String storedHash,
+  ) async {
+    try {
+      final parts = storedHash.split('\$');
+
+      if (parts.length != 6) {
+        return false;
+      }
+
+      if (parts[0] != 'argon2id') {
+        return false;
+      }
+
+      final memory = int.parse(parts[1]);
+      final iterations = int.parse(parts[2]);
+      final parallelism = int.parse(parts[3]);
+
+      final salt = base64Url.decode(parts[4]);
+      final expectedHash = base64Url.decode(parts[5]);
+
+      final algorithm = Argon2id(
+        memory: memory,
+        iterations: iterations,
+        parallelism: parallelism,
+        hashLength: expectedHash.length,
+      );
+
+      final secretKey = await algorithm.deriveKeyFromPassword(
+        password: password,
+        nonce: salt,
+      );
+
+      final calculatedHash = await secretKey.extractBytes();
+
+      return _constantTimeEquals(
+        calculatedHash,
+        expectedHash,
+      );
+    } catch (_) {
+      return false;
+    }
+  }
+
+  /// Erzeugt kryptographisch zufälligen Salt.
+  static List<int> _generateSalt(int length) {
+    final random = Random.secure();
+
+    return List<int>.generate(
+      length,
+      (_) => random.nextInt(256),
+    );
+  }
+
+  /// Vergleich ohne vorzeitigen Abbruch.
+  static bool _constantTimeEquals(
+    List<int> a,
+    List<int> b,
+  ) {
+    if (a.length != b.length) {
+      return false;
+    }
+
+    var difference = 0;
+
+    for (var i = 0; i < a.length; i++) {
+      difference |= a[i] ^ b[i];
+    }
+
+    return difference == 0;
+  }
+}

lib/helper/sample_bindings.dart

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+import 'package:get/get.dart';
+
+import '../controller/home_controller.dart';
+import '../controller/login_controller.dart';
+import '../controller/signin_controller.dart';
+
+
+
+
+
+class SampleBindings extends Bindings {
+  @override
+  void dependencies() {
+    // Define your dependencies here no permanent Binding
+    Get.lazyPut<LoginController>(() => LoginController());
+    Get.lazyPut<SigninController>(() => SigninController());
+    Get.lazyPut<HomeController>(() => HomeController());
+    
+    
+  }
+}

lib/helper/sample_routes.dart

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+import 'package:get/get.dart';
+import '../pages/home_view.dart';
+import '../pages/login_view.dart';
+import '../pages/signin_view.dart';
+import 'sample_bindings.dart';
+
+class SampleRouts {
+  static final sampleBindings = SampleBindings();
+  static List<GetPage<dynamic>> samplePages = [
+    GetPage(
+      name: LoginPage.namedRoute,
+      page: () => const LoginPage(),
+      binding: sampleBindings,
+    ),
+    GetPage(
+      name: SigninPage.namedRoute,
+      page: () => const SigninPage(),
+      binding: sampleBindings,
+    ),
+    GetPage(
+      name: HomePage.namedRoute,
+      page: () => const HomePage(),
+      binding: sampleBindings,
+    ),
+  ];
+}