java - 即使客户端未发送证书，SSL 套接字连接仍能正常工作？

Question

我对使用 Java 的密码学还很陌生。我必须构建一个程序，在进行任何数据通信之前交换证书。我正在使用 sslSockets 构建基本的客户端-服务器程序，我没有使用 HTTP/S，这只是为了获得额外的安全性。 (想知道 Socket 和 SSLSocket 之间的区别..这是否意味着所有内容都会自动加密？)

这是我更新的服务器代码:

public class SSLServerExample {
    final static String pathToStores = "C:/Users/XXX/Desktop/sslserverclientprogram";
    final static String keyStoreFile = "keystore.jks";
    final static String passwd = "changeit";

    final static int theServerPort = 8443;

    static boolean debug = false;



  public static void main(String args[]) throws Exception {

      String trustFilename = pathToStores + "/" + keyStoreFile;
//    System.out.println("Verifying KeyStore File of Client..");

    System.setProperty("javax.net.ssl.keyStore", trustFilename);
    System.setProperty("javax.net.ssl.keyStorePassword", passwd);
    if (debug)
        System.setProperty("javax.net.debug", "all");
        System.out.println("Setting up SSL parameters");

     // Initialize socket connection
       SSLServerSocketFactory sslssf = (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
    SSLServerSocket sslServerSocket = (SSLServerSocket)sslssf.createServerSocket(theServerPort);
    System.out.println("Server Started..Waiting for clients");
    sslServerSocket.setNeedClientAuth(true);
    SSLSocket sslSocket = (SSLSocket)sslServerSocket.accept();
    //sslSocket.startHandshake();
    System.out.println("Client Connected!");

    InputStream sslIS = sslSocket.getInputStream();

        OutputStream sslOS = sslSocket.getOutputStream();
        sslServerSocket.setNeedClientAuth(true);

    final int RSAKeySize = 1024;
    final String newline = "\n";

    Key pubKey = null;
    Key privKey = null; 
    boolean flag = sslSocket.getNeedClientAuth();
    System.out.println("Flag value: "+ flag);

即使我将其设置为 true 并且客户端发送的数据由服务器解密但没有相互验证，但该标志的结果为 False。

我错过了什么吗？

请帮忙。

PS:我的客户端代码:

public class SSLClientExample {
    final static String pathToStores = "C:/Users/XXX/Desktop/sslserverclientprogram";
    final static String trustStoreFile = "cacerts.jks";
    final static String passwd = "changeit";
    final static String INPUT_FILE = "E:/workspace/input.txt";
    final static String theServerName = "localhost";
    final static int theServerPort = 8443;

    static boolean debug = false;

  public static void main(String args[]) throws Exception {

      String trustFilename = pathToStores + "/" + trustStoreFile;
      System.out.println("Validating KeyStore file of Server..");

    System.setProperty("javax.net.ssl.trustStore", trustFilename);
    System.setProperty("javax.net.ssl.trustStorePassword", passwd);
    if (debug)
        System.setProperty("javax.net.debug", "all");


    SSLSocketFactory sslssf = (SSLSocketFactory) SSLSocketFactory.getDefault();
    SSLSocket sslSocket = (SSLSocket)sslssf.createSocket(theServerName, 8443);
    System.out.println("Connected to Server!");

Answer 1

在接受传入的客户端连接之前，您必须调用 sslServerSocket.setNeedClientAuth(true);。在建立连接后修改服务器套接字的配置。