加密算法

package com.ericsson.dve.custom.authenticationplugin;

 

import java.io.IOException;

import java.security.InvalidKeyException;

import java.security.NoSuchAlgorithmException;

import java.security.Security;

import java.util.Scanner;

 

import javax.crypto.BadPaddingException;

import javax.crypto.Cipher;

import javax.crypto.IllegalBlockSizeException;

import javax.crypto.NoSuchPaddingException;

import javax.crypto.SecretKey;

import javax.crypto.spec.SecretKeySpec;

 

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

 

 

public class Encyptor {

 

    private Cipher c;  

    private static byte[] caay = {99, 61, 84, -69, 84, 56, -42, 114, -10, 124, 31, -48, -27, 3, 40, 56};

    private  SecretKey cay;

      

    public Encyptor() throws NoSuchAlgorithmException, NoSuchPaddingException{  

        Security.addProvider(new com.sun.crypto.provider.SunJCE());  

        cay = new SecretKeySpec(caay, "AES");

        c = Cipher.getInstance("AES");  

    }  

      

    /** 

     *

     *  

     * @param str 

     * @return 

     * @throws InvalidKeyException 

     * @throws IllegalBlockSizeException 

     * @throws BadPaddingException 

     */  

    public String Encrytor(String str) throws InvalidKeyException,  

            IllegalBlockSizeException, BadPaddingException {  

 

        c.init(Cipher.ENCRYPT_MODE, cay);  

        byte[] src = str.getBytes();  

       

        byte[] cipherByte = c.doFinal(src);  

  

        String  base64Byte =  new String(Base64.encodeBase64(cipherByte));

        return base64Byte;  

    }  

  

    /** 

     * 对字符串解密 

     *  

     * @param buff 

     * @return 

     * @throws InvalidKeyException 

     * @throws IllegalBlockSizeException 

     * @throws BadPaddingException 

     * @throws IOException 

     */  

    public String Decryptor(String encpytedCode) throws InvalidKeyException,  

            IllegalBlockSizeException, BadPaddingException, IOException {  

      

        c.init(Cipher.DECRYPT_MODE, cay);  

 

        byte[]  base64Byte = Base64.decodeBase64(encpytedCode.getBytes());

        byte[] cipherByte = c.doFinal(base64Byte);  

        return new String(cipherByte);  

    }  

  

    /** 

     * @param args 

     * @throws NoSuchPaddingException  

     * @throws NoSuchAlgorithmException  

     * @throws BadPaddingException  

     * @throws IllegalBlockSizeException  

     * @throws InvalidKeyException  

     */  

    public static void main(String[] args) {  

   

       // String msg ="郭XX-搞笑相声全集";  

//    String msg ="secret";

//        System.out.println("text:" + msg);  

//        String encypted;

//try {

//encypted = new Encyptor().Encrytor(msg);

//System.out.println("after encode: " + new Encyptor().Encrytor(msg));  

//    System.out.println("after decode: " + new Encyptor().Decryptor(encypted));  

//} catch (Exception e) {

//e.printStackTrace();

//}

 

System.out.println("please input password, please input 'exit' to exit");

Scanner scan = new Scanner(System.in);

        while(scan.hasNext()){

        String s = scan.next();

        if("exit".equalsIgnoreCase(s)){

        break;

        }

       

        try {

String encypted  = new Encyptor().Encrytor(s);

System.out.println("after encode: " + new Encyptor().Encrytor(s));  

   System.out.println("after decode: " + new Encyptor().Decryptor(encypted));  

} catch (Exception e) {

e.printStackTrace();

}

       

        }

        scan.close();

    }  

}