C# 客户端通过 SSL 连接到 Java 服务器

Question

作为一个团队项目，我需要从 C# 客户端连接到 Java 6.5 SSL 服务器，但是当我到达 stream.AuthenticateAsClient 行时，它会挂起。

C# 连接代码

public static void connect(string server, Int32 port)
{
  try
  {
    client = new TcpClient(server, port);
    stream = new SslStream(client.GetStream(), false);
    stream.AuthenticateAsClient("MyCNfield");
...
...

如果我连接到https://mail.google.com 之类的东西并将MyCNfield 设置为mail.google.com，它工作正常，所以我认为它是Java 端。

Java Init 部分是：

public void initSSL() throws IOException, KeyStoreException, NoSuchAlgorithmException,
                             CertificateException, UnrecoverableKeyException, KeyManagementException {
    char[] passphrase = "scared".toCharArray();
    System.out.println(java.security.KeyStore.getDefaultType());
    boolean handshakedone=false;

    KeyStore keystore1 = KeyStore.getInstance("jks");
    FileInputStream fis = new FileInputStream("C:\\\\temp\\\\work.jks");
    keystore1.load(fis, passphrase);
    fis.close();
    KeyStore ksTrust = KeyStore.getInstance("jks");
    FileInputStream fis2 =  new FileInputStream("C:\\\\temp\\\\work.jks");
    ksTrust.load(fis2, passphrase);

    KeyManagerFactory kmf =    KeyManagerFactory.getInstance("SunX509");

    // KeyManager's decide which key material to use.
    kmf.init(keystore1, passphrase);

    // TrustManager's decide whether to allow connections.
    TrustManagerFactory tmf =   TrustManagerFactory.getInstance("SunX509");
    tmf.init(ksTrust);

    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init( kmf.getKeyManagers(), tmf.getTrustManagers(), null);

    SSLServerSocketFactory sslserversocketfactory =(SSLServerSocketFactory) sslContext.getServerSocketFactory();
    sslserversocket =(SSLServerSocket) sslserversocketfactory.createServerSocket(2443);
    sslserversocket.setUseClientMode(false);

    //Context conte
    ServerSocketFactory serversocketfactory =(ServerSocketFactory) sslContext.getServerSocketFactory();

    //  serverSocket = new ServerSocket(2443);
    System.out.println("OK we are set up");
}

它被调用：

sslsocket = (SSLSocket) sslserversocket.accept();

并继续，即使连接未完全验证。

需要改变什么来解决这个问题：JKS 有一个证书MyCNfield，它由我创建的 CA 签名。如何在我的 C# 中将证书链导入我的私有 CA，或者如何使用 Java 和 C# 交换自签名证书，然后丢弃我当前的 JKS？

Answer 1

您需要使用 RemoteCertificateValidationCallback 回调机制来提供证书认证。你不应该关闭这个问题，这是很多人可能有的一个有效问题。这个答案是谷歌搜索的第一个热门，这要归功于 stackoverflow 的出色 SEO，因此它可能会导致人们走错路。

使用 RemoteCertificateValidationCallback 回调。

private readonly bool allowSsl;

// callback used to validate the certificate in an SSL conversation
private static bool ValidateRemoteCertificate(
object sender,
    X509Certificate certificate,
    X509Chain chain,
    SslPolicyErrors policyErrors
)
{
    if (allowSsl)
    {
        // allow any certificate...
        return true;
    }
    else
    {
        return policyErrors == SslPolicyErrors.None;
    }
}

下面是您如何将它与 TCPClient 一起使用：

TcpClient client = new TcpClient(machineName,443);
Console.WriteLine("Client connected.");

// Create an SSL stream, specifying the callback above.
SslStream sslStream = new SslStream(
    client.GetStream(), 
    false, 
    new RemoteCertificateValidationCallback (ValidateRemoteCertificate), 
    null
    );