在握手之前解密从 tls 上的 websocket 客户端接收的字节

Question

我开发了一个与 websockets 兼容的套接字服务器，用于与 java 和 web 中制作的应用程序进行通信。但是最新的 Chrome 和 Mozilla 更新不再允许与 websockets 的不安全连接。然后我被迫解密我的服务器接收的字节，然后再继续握手和协议的其余部分 https://www.rfc-editor.org/rfc/rfc6455

我取得了以下成就：

从 CA 签名的证书中获取 public 密钥。还有我服务器的私钥
使用 Java 的密码 class 我已经设法使用这些密钥加密和解密测试字符串

但是我仍然不能做的是在继续握手之前解密我从 websocket 客户端接收到的字节。

希望你能帮助我。谢谢

我收到的错误：数据不能超过 256 字节

Answer 1

已解决！解密委托给 SSLSocket class。如果有人想在此处执行此步骤。

导出CA颁发的证书和私钥到p12文件

openssl pkcs12 -export -in certificate/path/certificate.crt -inkey /path/privatekey/private.key -out filep12.p12 -name your_domain -CAfile /path/ca.crt -caname your_ca

Java 密钥库

keytool -genkey -alias your_alias -keyalg RSA -keystore name_store.jks -keysize 2048

输入密码(your_password)并确认后

keytool -importkeystore -srckeystore name_store.jks -destkeystore name_store.jks -deststoretype pkcs12 -srcstorepass your_password

keytool -delete -alias your_alias -keystore name_store.jks -storepass your_password

keytool -importkeystore -deststorepass your_password -destkeypass your_password -destkeystore name_store.jks -srckeystore filep12.p12 -srcstoretype PKCS12 -srcstorepass your_password -alias your_domain

your_alias must not be the same or similar to your_domain, the password is asked to enter (your_password) in each step that is always the same so that when decrypting there are no padding errors

java中的class

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLServerSocketFactory;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.TrustManagerFactory;


public class SServidor {   


public SServidor(){
    try {
        KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
        File keystrorefile = new File("/path/name_store.jks");
        System.out.println(keystrorefile.getAbsolutePath());
        InputStream keystoreStream = new FileInputStream(keystrorefile);
        char[] passphrase="your_password".toCharArray();            

        keystore.load(keystoreStream, passphrase);
        KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
        keyManagerFactory.init(keystore, passphrase);
        makeSSLSocketFactory(keystore, keyManagerFactory);

    } catch (KeyStoreException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    } catch (FileNotFoundException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    } catch (NoSuchAlgorithmException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    } catch (CertificateException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    } catch (UnrecoverableKeyException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    }
}

private void log(Object msj){
    System.out.println(msj.toString());
}

public void makeSSLSocketFactory(KeyStore loadedKeyStore, KeyManagerFactory key){

    try {
        TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
        trustManagerFactory.init(loadedKeyStore);
        SSLContext ctx = SSLContext.getInstance("TLS");            
        ctx.init(key.getKeyManagers(), trustManagerFactory.getTrustManagers(), null);
        SSLServerSocketFactory sslssf = ctx.getServerSocketFactory();
        ServerSocket conexion = sslssf.createServerSocket(your_port);
        SSLSocket cliente=(SSLSocket) conexion.accept();

        cliente.startHandshake();
        InputStream in = cliente.getInputStream();            
        OutputStream out = cliente.getOutputStream();
        int byte_recibido=-1;   

        while(cliente.isConnected() && (byte_recibido=in.read())>-1){
            Integer n=byte_recibido & 0xFF;  
            String s=new String(String.valueOf(Character.toChars(n)));
            log(s);
        }

            out.close();                        
            bin.close();
                    in.close();
            cliente.close();
            conexion.close();


    } catch (NoSuchAlgorithmException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    } catch (KeyStoreException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    } catch (KeyManagementException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(SServidor.class.getName()).log(Level.SEVERE, null, ex);
    }

} 

}`

Something else, the connection to the websocket should be like this wss://your_domain:port An IP address must not be entered in the websocket url, it must be done with the domain registered in the certificate issued by the CA

有了解密的字节，我可以继续 RFC6455 协议。这只是我做的测试，很明显是一个sockets应用，另外还需要异步处理连接到服务器的客户端。我使用 ExecutorService class 执行此操作，但这是另一个主题

在握手之前解密从 tls 上的 websocket 客户端接收的字节

Decrypt bytes received from a websocket client on tls before the handshake

java

encryption

ssl

websocket

handshake