مثال على تشفير Java SSLSocket مع TLS1.3 و TLS_AES_128_GCM_SHA256

package crunchify . com . tutorials ;

 

import javax . net . ssl . SSLSocket ;

import javax . net . ssl . SSLSocketFactory ;

import java . io . * ;

 

/**

*/

 

public class CrunchifySSLTLS13Tutorial {

 

     // TLS1.3: There are new ciphersuites that only work in TLSv1.3. The old ciphersuites cannot be used for TLSv1.3 connections and the new ones cannot be used in TLSv1.2 and below.

     //The new ciphersuites are defined differently and do not specify the certificate type (e.g. RSA, DSA, ECDSA) or the key exchange mechanism (e.g. DHE or ECHDE). This has implications for ciphersuite configuration.

     private static final String [ ] crunchifyProtocols = new String [ ] { "TLSv1.3" } ;

 

     // TLS_AES_128_GCM_SHA256 Encryption: Advanced Encryption Standard with 128bit key in Galois/Counter mode (AES 128 GCM)

     // Hash: Secure Hash Algorithm 256 (SHA256)

     // RFC 8446

     private static final String [ ] crunchifyCipher = new String [ ] { "TLS_AES_256_GCM_SHA384" } ;

 

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

 

         // This class extends Sockets and provides secure socket using protocols such as the "Secure Sockets Layer" (SSL) or IETF "Transport Layer Security" (TLS) protocols.

         SSLSocket crunchifySocket = null ;

         PrintWriter crunchifyPrintWriter = null ;

         BufferedReader crunchifyBufferReader = null ;

 

         try {

             // initialize SSL Socket Factory

             SSLSocketFactory crunchifyFactory = ( SSLSocketFactory ) SSLSocketFactory . getDefault ( ) ;

 

             crunchifySocket = ( SSLSocket ) crunchifyFactory . createSocket ( "google.com" , 443 ) ;

 

             // Enable protocol : TLS 1.3

             crunchifySocket . setEnabledProtocols ( crunchifyProtocols ) ;

 

             // Enable Cipher: TLS_AES_128_GCM_SHA256

             crunchifySocket . setEnabledCipherSuites ( crunchifyCipher ) ;

 

             // Start Handshake

             crunchifySocket . startHandshake ( ) ;

 

             // Creates a new PrintWriter, without automatic line flushing.

             crunchifyPrintWriter = new PrintWriter ( new BufferedWriter ( new OutputStreamWriter ( crunchifySocket . getOutputStream ( ) ) ) ) ;

 

             crunchifyPrintWriter . println ( "GET / HTTP/1.0" ) ;

             crunchifyPrintWriter . println ( ) ;

             crunchifyPrintWriter . flush ( ) ;

 

             if ( crunchifyPrintWriter . checkError ( ) )

                 System . out . println ( "SSLSocketClient Error:  java.io.PrintWriter error" ) ;

 

             // Let's get response

             crunchifyBufferReader = new BufferedReader ( new InputStreamReader ( crunchifySocket . getInputStream ( ) ) ) ;

 

             String crunchifyStringLine ;

             while ( ( crunchifyStringLine = crunchifyBufferReader . readLine ( ) ) ! = null )

                 crunchifyLog ( crunchifyStringLine ) ;

 

         } catch ( Exception e ) {

             e . printStackTrace ( ) ;

         } finally {

             // Close Socket

             if ( crunchifySocket ! = null )

                 crunchifySocket . close ( ) ;

 

             // Close PrintWriter

             if ( crunchifyPrintWriter ! = null )

                 crunchifyPrintWriter . close ( ) ;

 

             // Close Buffer Reader

             if ( crunchifyBufferReader ! = null )

                 crunchifyBufferReader . close ( ) ;

         }

     }

 

     private static void crunchifyLog ( String crunchifyStringLine ) {

 

         System . out . println ( crunchifyStringLine ) ;

     }

 

}

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CrunchifySSLTLS13Tutorial

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