Source Code : Key Generator Mac

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Key Generator Mac

   
import java.security.Security;

import javax.crypto.KeyGenerator;
import javax.crypto.Mac;
import javax.crypto.SecretKey;

public class MainClass {
  public static void main(String args[]) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    String inputString = "www.java2s.com";

    KeyGenerator keyGen = KeyGenerator.getInstance("HmacMD5");
    SecretKey secretKey = keyGen.generateKey();

    Mac mac = Mac.getInstance(secretKey.getAlgorithm());
    mac.init(secretKey);

    byte[] byteData = inputString.getBytes("UTF8");

    byte[] macBytes = mac.doFinal(byteData);

    String macAsString = new sun.misc.BASE64Encoder().encode(macBytes);

    System.out.println("Authentication code is: " + macAsString);
  }
}
           
         
    
    
  

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