如何在Java SSL中加载本地客户端证书？

编程问答 2022-08-15

问题描述

我尝试使用TLS连接到服务器的套接字，该TLS需要使用此 client.java 代码

进行客户端身份验证 
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;


public class Client {
    public static void main(String[] args){
        System.setProperty("javax.net.ssl.trustStore","/home/toni/.keystore");
        System.setProperty("javax.net.ssl.trustStorePassword","jOk<>123");
        
        String host = "localhost";
        Integer port = 8000;
        byte[] data = new byte[4096];
     
        SSLSocketFactory factory = (SSLSocketFactory) SSLSocketFactory.getDefault();
        try(
            SSLSocket socket = (SSLSocket) factory.createSocket(host,port);
            InputStream in = socket.getInputStream();
            OutputStream out = socket.getoutputStream();
        ){
            out.write("Hi,I am client".getBytes());
            in.read(data);
            System.out.println(new String(data));
        } catch (IOException ex) {
            Logger.getLogger(Client.class.getName()).log(Level.SEVERE,null,ex);
        }
    }
}

但是 client.java 似乎没有将本地客户端证书发送到服务器，因此服务器返回错误：

ssl.SSLError: [SSL: PEER_DID_NOT_RETURN_A_CERTIFICATE] peer did not return a certificate (_ssl.c:852)

这是我的keytool -list 

Keystore type: PKCS12
Keystore provider: SUN

Your keystore contains 2 entries

client,Aug 20,2020,PrivateKeyEntry,Certificate fingerprint (SHA-256): 41:36:F0:A5:38:DA:99:D1:6A:B1:44:87:9C:00:CF:73:FC:96:48:22:79:B5:3A:9A:ED:44:C8:AA:CA:97:45:5E
localhost,trustedCertEntry,Certificate fingerprint (SHA-256): 1A:CB:DA:E3:ED:BF:E0:C8:C1:13:13:8C:A4:FB:20:48:53:54:80:D3:36:14:35:9C:EF:AF:5B:16:E2:54:97:B8

如何使我的 client.java 加载上面的client别名证书，并在与服务器握手时使用它？

解决方法

我只是了解keyStore和trustStore之间的区别。实际上，在Java中，我不需要在客户端中显式指定客户端证书。我只需要这样声明我的KeyStore：

        String file = "/home/toni/.keystore";
        String password = "jOk<>123";
        System.setProperty("javax.net.ssl.trustStore",file);
        System.setProperty("javax.net.ssl.trustStorePassword",password);
        System.setProperty("javax.net.ssl.keyStore",file);
        System.setProperty("javax.net.ssl.keyStorePassword",password);
client-certificatesjavajavajssessl