c# - Java 和 C# 应用程序之间的 SSL 通信

Question

我的目标是在 Java 服务器和用 C# 编写的客户端之间建立安全通信。

Java 服务器代码:

  System.setProperty("javax.net.ssl.keyStore","cert/mySrvKeystore");
  System.setProperty("javax.net.ssl.keyStorePassword","myPassword");

  SSLServerSocketFactory sslserversocketfactory =
            (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
  SSLServerSocket sslserversocket =  = (SSLServerSocket) sslserversocketfactory.createServerSocket(2389);

    while(true) {
    System.err.println("server w8 new connection");
     try {

            SSLSocket sslsocket = (SSLSocket) sslserversocket.accept();
            //sslsocket.startHandshake();

            in = sslsocket.getInputStream();
            out = sslsocket.getOutputStream();
            out.flush();

            String response = new String(receiveMessage());
            while (response != "end") {
                System.out.println("Server recv="+response);
                response = new String(receiveMessage());
                sendMessage(("echo="+response).getBytes());
            }
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

和用 c# 编写的客户端:

        client = new TcpClient() { SendTimeout = 5000, ReceiveTimeout = 5000 };
        IPEndPoint serverEndPoint = new IPEndPoint(IPAddress.Parse(host), port);

        client.Connect(serverEndPoint);
        client.NoDelay = true;
        Console.WriteLine("Client connected.");

        // Create an SSL stream that will close the client's stream.
        SslStream sslStream = new SslStream(client.GetStream(), false, ValidateServerCertificate, null);
        // The server name must match the name on the server certificate.
        try
        {
            sslStream.AuthenticateAsClient("someName");
        }
        catch (AuthenticationException error)
        {
            Console.WriteLine("Exception: {0}", error.Message);
            if (error.InnerException != null)
            {
                Console.WriteLine("Inner exception: {0}", error.InnerException.Message);
            }
            Console.WriteLine("Authentication failed - closing the connection.");
            client.Close();
            return;
        }

        ASCIIEncoding ascii = new ASCIIEncoding();
        SendData(ascii.GetBytes("Hello World"));     

和

    public static bool ValidateServerCertificate(
          object sender,
          X509Certificate certificate,
          X509Chain chain,
          SslPolicyErrors sslPolicyErrors)
    {
        if (sslPolicyErrors == SslPolicyErrors.None)
            return true;

        Console.WriteLine("Certificate error: {0}", sslPolicyErrors);

        // Do not allow this client to communicate with unauthenticated servers.
        return false;
    }

我得到以下错误:在 c# 中

 A first chance exception of type "System.Security.Authentication.AuthenticationException" occurred in System.dll
 Certificate error: RemoteCertificateChainErrors
 Exception: The remote certificate is invalid according to the validation procedure.
 Authentication failed - closing the connection.

我知道问题可能是我使用了不同类型的证书，但我不知道如何在 java 中使用 X509Certificate 制作标准 sslServerSocket。有人可以通过很好的例子帮助我，或者给我一些如何实现目标的建议吗？

附言我一直在寻找 bouncycaSTLe 库，因为它同时具有 java 和 c# 实现，但我想使用标准库和语言的内置功能。<​​/p>

Answer 1

从您的示例来看，您似乎不需要以编程方式生成证书和私钥。您可以使用 keytool 在服务器 keystore 中生成证书:

keytool -genkey -alias myalias -keystore mykeystore.jks -dname "CN=www.example.com"

或者更好的是，如果您使用 Java 7 的 keytool，也可以使用 SAN 扩展:

keytool -genkey -alias myalias -keystore mykeystore.jks -dname "CN=www.example.com" -ext san=dns:www.example.com

这里，www.example.com 是客户端看到的主机名。您可以在主题 DN (dname) 中添加其他内容，但要确保 CN 是主机名。

生成后，使用以下方式导出您的自签名证书:

keytool -export myservercert.crt -alias myalias -keystore mykeystore.jks

然后您应该能够将其作为受信任的证书导入到您的 Windows 证书存储区中，以便从 C# 中使用。