DES 加密解密

import  sun.misc.BASE64Decoder;
import  sun.misc.BASE64Encoder;

import  javax.crypto. * ;
import  javax.crypto.spec.DESKeySpec;
import  javax.crypto.spec.IvParameterSpec;
import  java.io.UnsupportedEncodingException;
import  java.security.InvalidAlgorithmParameterException;
import  java.security.InvalidKeyException;
import  java.security.NoSuchAlgorithmException;
import  java.security.spec.InvalidKeySpecException;

/**
 * User: fengxuesong
 * Date: 11-3-30
 * Time: 下午4:48
 * 使用 DES 加密解密
  */
public   class  DesTest {

     static   final   byte [] IV  =   new   byte []{ - 29 ,  105 ,  5 ,  40 ,  - 94 ,  - 98 ,  - 113 ,  - 100 };
     static   final  String priKey = " 11111111111 " ;
     static   final  String data = " admin11 " ;

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

         // 加密
        String encrypt   =  encodeDesWithBase64(priKey,data);
         // 输出加密的字符串
        System.out.println(encrypt );

        String decrypt  = decodeDesWithBase64(priKey,encrypt );
        System.out.println(decrypt );
    }

     private   static  String encodeDesWithBase64(String priKey,String data)  throws  InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
        DESKeySpec desKS  =   new  DESKeySpec(priKey.getBytes());
        SecretKeyFactory skf  =  SecretKeyFactory.getInstance( " DES " );
        SecretKey sk  =  skf.generateSecret(desKS);
        Cipher cip  =  Cipher.getInstance( " DES/CBC/PKCS5Padding " );
        cip.init(Cipher.ENCRYPT_MODE, sk,  new  IvParameterSpec(IV));
         byte  bb []  = cip.doFinal(data.getBytes());
         return   new  BASE64Encoder().encode(bb);
    }
     private   static  String decodeDesWithBase64(String priKey,String data)  throws  Exception{
        DESKeySpec desKS  =   new  DESKeySpec(priKey.getBytes());
        SecretKeyFactory skf  =  SecretKeyFactory.getInstance( " DES " );
        SecretKey sk  =  skf.generateSecret(desKS);
        Cipher cip  =  Cipher.getInstance( " DES/CBC/PKCS5Padding " );
        cip.init(Cipher.DECRYPT_MODE, sk,  new  IvParameterSpec(IV));
         byte  bb []  = cip.doFinal( new  BASE64Decoder().decodeBuffer(data));
         return   new  String(bb);
    }
}