Use JDK 3DES - Java Security

Java examples for Security:DES

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Description

Use JDK 3DES

Demo Code


import java.security.Key;
import java.security.SecureRandom;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

import org.apache.commons.codec.binary.Base64;

public class Imooc3DES {

    private static String src = "imooc security 3des";

    public static void main(String[] args) {
        jdk3DES();//from w ww.  j a  v a2 s .c o  m
    }

    public static void jdk3DES() {
        try {
            KeyGenerator keyGenerator = KeyGenerator.getInstance("DESede");
            //      keyGenerator.init(168);
            keyGenerator.init(new SecureRandom());
            SecretKey secretKey = keyGenerator.generateKey();
            byte[] bytesKey = secretKey.getEncoded();

            DESKeySpec desKeySpec = new DESKeySpec(bytesKey);
            SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");
            Key convertSecretKey = factory.generateSecret(desKeySpec);

            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, convertSecretKey);
            byte[] result = cipher.doFinal(src.getBytes());
            System.out.println("jdk 3des encrypt : "
                    + Base64.encodeBase64String(result));

            cipher.init(Cipher.DECRYPT_MODE, convertSecretKey);
            result = cipher.doFinal(result);
            System.out.println("jdk 3des decrypt : " + new String(result));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void bc3DES() {
        //TODO 
    }

}

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