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205 lines
9.9 KiB
205 lines
9.9 KiB
import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:http/http.dart' as http;
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import 'package:shared_preferences/shared_preferences.dart';
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import '/utils/encryption/crypto_utils.dart';
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import '/utils/encryption/aes_helper.dart';
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import '/utils/storage/encryption_keys.dart';
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import '/utils/storage/session_cookie.dart';
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class LoginResponse {
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final String status;
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final String message;
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final String asymmetricPublicKey;
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final String asymmetricPrivateKey;
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const LoginResponse({
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required this.status,
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required this.message,
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required this.asymmetricPublicKey,
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required this.asymmetricPrivateKey,
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});
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factory LoginResponse.fromJson(Map<String, dynamic> json) {
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return LoginResponse(
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status: json['status'],
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message: json['message'],
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asymmetricPublicKey: json['asymmetric_public_key'],
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asymmetricPrivateKey: json['asymmetric_private_key'],
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);
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}
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}
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Future<LoginResponse> login(context, String username, String password) async {
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final resp = await http.post(
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Uri.parse('http://192.168.1.5:8080/api/v1/login'),
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headers: <String, String>{
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'Content-Type': 'application/json; charset=UTF-8',
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},
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body: jsonEncode(<String, String>{
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'username': username,
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'password': password,
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}),
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);
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if (resp.statusCode != 200) {
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throw Exception(resp.body);
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}
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String? rawCookie = resp.headers['set-cookie'];
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if (rawCookie != null) {
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int index = rawCookie.indexOf(';');
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setSessionCookie((index == -1) ? rawCookie : rawCookie.substring(0, index));
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}
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LoginResponse response = LoginResponse.fromJson(jsonDecode(resp.body));
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var rsaPrivPem = AesHelper.aesDecrypt(password, base64.decode(response.asymmetricPrivateKey));
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debugPrint(rsaPrivPem);
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var rsaPriv = CryptoUtils.rsaPrivateKeyFromPem(rsaPrivPem);
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setPrivateKey(rsaPriv);
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final preferences = await SharedPreferences.getInstance();
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preferences.setBool('islogin', true);
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return response;
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}
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class Login extends StatelessWidget {
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const Login({Key? key}) : super(key: key);
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static const String _title = 'Envelope';
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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backgroundColor: Colors.cyan,
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appBar: AppBar(
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title: null,
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automaticallyImplyLeading: true,
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//`true` if you want Flutter to automatically add Back Button when needed,
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//or `false` if you want to force your own back button every where
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leading: IconButton(icon: const Icon(Icons.arrow_back),
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onPressed:() => {
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Navigator.pop(context)
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}
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)
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),
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body: const SafeArea(
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child: LoginWidget(),
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),
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);
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}
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}
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class LoginWidget extends StatefulWidget {
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const LoginWidget({Key? key}) : super(key: key);
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@override
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State<LoginWidget> createState() => _LoginWidgetState();
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}
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class _LoginWidgetState extends State<LoginWidget> {
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final _formKey = GlobalKey<FormState>();
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TextEditingController usernameController = TextEditingController();
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TextEditingController passwordController = TextEditingController();
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@override
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Widget build(BuildContext context) {
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const TextStyle _inputTextStyle = TextStyle(fontSize: 18, color: Colors.black);
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final ButtonStyle _buttonStyle = ElevatedButton.styleFrom(
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primary: Colors.white,
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onPrimary: Colors.cyan,
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minimumSize: const Size.fromHeight(50),
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padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 10),
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textStyle: const TextStyle(
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fontSize: 20,
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fontWeight: FontWeight.bold,
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color: Colors.red,
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),
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);
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return Center(
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child: Form(
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key: _formKey,
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child: Center(
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child: Padding(
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padding: const EdgeInsets.all(15),
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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crossAxisAlignment: CrossAxisAlignment.center,
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children: [
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const Text('Login', style: TextStyle(fontSize: 35, color: Colors.white),),
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const SizedBox(height: 30),
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TextFormField(
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controller: usernameController,
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decoration: const InputDecoration(
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hintText: 'Username',
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),
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style: _inputTextStyle,
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// The validator receives the text that the user has entered.
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validator: (value) {
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if (value == null || value.isEmpty) {
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return 'Create a username';
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}
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return null;
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},
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),
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const SizedBox(height: 5),
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TextFormField(
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controller: passwordController,
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obscureText: true,
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enableSuggestions: false,
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autocorrect: false,
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decoration: const InputDecoration(
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hintText: 'Password',
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),
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style: _inputTextStyle,
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// The validator receives the text that the user has entered.
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validator: (value) {
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if (value == null || value.isEmpty) {
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return 'Enter a password';
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}
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return null;
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},
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),
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const SizedBox(height: 5),
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ElevatedButton(
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style: _buttonStyle,
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onPressed: () {
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if (_formKey.currentState!.validate()) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('Processing Data')),
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);
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login(
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context,
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usernameController.text,
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passwordController.text,
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).then((value) {
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Navigator.
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pushNamedAndRemoveUntil(
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context,
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'/home',
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ModalRoute.withName('/home'),
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);
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}).catchError((error) {
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print(error); // TODO: Show error on interface
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});
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}
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},
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child: const Text('Submit'),
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),
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],
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)
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)
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)
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)
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);
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}
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}
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