用于客户端证书身份验证的 flutter/dart 文件夹中的 Assets 文件夹

Question

我正在尝试在 dart 中进行客户端证书身份验证。但是当我用颤振编译应用程序时，我一直找不到 cert.p12。这是我进行证书身份验证的方式。

HttpClient createHttpClient(SecurityContext context) {
final cert = "assets/cert.p12";
final password = "mittal";
final sc = SecurityContext.defaultContext
  ..useCertificateChain(cert, password: password)
  ..usePrivateKey(cert, password: password);
return super.createHttpClient(sc)

我的 assets 文件夹位于项目的根目录，而 cert.p12 就在其中。请帮忙。

这是android studio的截图：

The Screenshot

我已经阅读了https://flutter.dev/docs/development/ui/assets-and-images 并添加了，但仍然是同样的问题。请帮忙

flutter:
  assets:
    - assets/
    - assets/cert.p12

Answer 1

其实你是这么说的：

String cert = "assets/cert.p12"

这是一个对我来说如何工作的示例：

final clientCert = await rootBundle.load('assets/cert.p12');

context.useCertificateChainBytes(clientCert.buffer.asUint8List(), password: password);

这是一个完整的例子：

class MyHttpOverrides extends HttpOverrides {
  ByteData clientCert;
  ByteData keystore;

  MyHttpOverrides({
    required this.clientCert,
    required this.keystore,
  });

  @override
  HttpClient createHttpClient(SecurityContext? context) {
    context = SecurityContext.defaultContext;

    bool _certificateCheck(truststore, String host, int port) {
      return host == "test.backend.com";
    }

    String password = "password";

    context.useCertificateChainBytes(clientCert.buffer.asUint8List(), password: password);

    context.usePrivateKeyBytes(keystore.buffer.asUint8List(), password: password);

    HttpClient client = super.createHttpClient(context)..badCertificateCallback = (_certificateCheck);

    client..badCertificateCallback = (_certificateCheck);

    return client;
  }
}

并像这样使用它：

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  
  final clientCert = await rootBundle.load('assets/cert.pem');
  final keystore = await rootBundle.load('assets/key.pem');

  HttpOverrides.global = MyHttpOverrides(
    clientCert: clientCert,
    keystore: keystore,
  );
  runApp(MyApp());
}

这些是进口：

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';