How to solve 'CERTIFICATE_VERIFY_FAILED: self signed certificate in certificate chain(handshake.cc:354)'

[Nicolás Peñaloza]

Hello everyone!

I am trying to connect my application in Flutter with a Websocket, but it has not been possible as the Websocket server uses a self-signed certificate and Flutter considers the certificate to be invalid.

Does anyone know if it is possible to configure Flutter to accept self-signed certificates?

------------------------------------ CODE ----------------------------------------------------

import 'package:flutter/material.dart';

import 'package:web_socket_channel/io.dart';

import 'package:test1/home.dart';

void main() => runApp(App());

class App extends StatelessWidget {

  @override

  Widget build(BuildContext context) {

    return MaterialApp(

      title: 'Test 1',

      home: HomePage(

        channel: IOWebSocketChannel.connect('wss://10.0.2.2:6868'),

      ),

    );

  }

}

import 'dart:convert';

import 'package:flutter/material.dart';

import 'package:web_socket_channel/web_socket_channel.dart';

class HomePage extends StatefulWidget {

  final WebSocketChannel channel;

  HomePage({Key key, @required this.channel}) : super(key: key);

  @override

  _HomePageState createState() => _HomePageState();

}

class _HomePageState extends State<HomePage> {

  Map<String, dynamic> request = {

    "id": 1,

    "jsonrpc": "2.0",

    "method": "getCortexInfo"

  };

  @override

  Widget build(BuildContext context) {

    return Scaffold(

        appBar: AppBar(

          title: Text('Test 1'),

        ),

        body: Column(

          mainAxisAlignment: MainAxisAlignment.center,

          children: [

            Center(

              child: IconButton(

                  icon: Icon(Icons.send),

                  onPressed: () {

                    widget.channel.sink.add(jsonEncode(request));

                  }),

            ),

            StreamBuilder(

                stream: widget.channel.stream,

                builder: (BuildContext context, AsyncSnapshot snapshot) {

                  print('Response: ${snapshot.data}');

                  print('Error: ${snapshot.error}');

                  return Padding(

                    padding: const EdgeInsets.only(top: 20.0),

                    child: Text(

                        snapshot.hasData ? '${snapshot.data}' : 'Not response'),

                  );

                }),

          ],

        ));

  }

  @override

  void dispose() {

    widget.channel.sink.close();

    super.dispose();

  }

}

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ERROR : WebSocketChannelException: WebSocketChannelException: HandshakeException: Handshake error in client (OS Error: CERTIFICATE_VERIFY_FAILED: self signed certificate in certificate chain(handshake.cc:354))