DES加密 java与.net可以相互加密解密两种方法

通过这个方法可以实现java和C#相互加密与解密 并能保持解密出来一致

方法一:通过.NET的key和VI来生成对应于java的key

java:

  

import java.security.Key;
import java.security.spec.AlgorithmParameterSpec;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;

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

public class CryptoTools {

	private static final byte[] DESkey = { (byte) 0x15, (byte) 0xE7,
			(byte) 0xA1, (byte) 0x22, (byte) 0x96, (byte) 0x8B, (byte) 0x24,
			(byte) 0xFA };// 设置密钥，略去

	private static final byte[] DESIV = { (byte) 0xCE, (byte) 0x35, (byte) 0x5,
			(byte) 0xD, (byte) 0x98, (byte) 0x91, (byte) 0x8, (byte) 0xA };// 设置向量，略去

	static AlgorithmParameterSpec iv = null;// 加密算法的参数接口，IvParameterSpec是它的一个实现
	private static Key key = null;

	public CryptoTools() throws Exception {
		DESKeySpec keySpec = new DESKeySpec(DESkey);// 设置密钥参数
		iv = new IvParameterSpec(DESIV);// 设置向量
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// 获得密钥工厂
		key = keyFactory.generateSecret(keySpec);// 得到密钥对象

	}

	public String encode(String data) throws Exception {
		Cipher enCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");// 得到加密对象Cipher
		enCipher.init(Cipher.ENCRYPT_MODE, key, iv);// 设置工作模式为加密模式，给出密钥和向量
		byte[] pasByte = enCipher.doFinal(data.getBytes("utf-8"));
		BASE64Encoder base64Encoder = new BASE64Encoder();
		return base64Encoder.encode(pasByte);
	}

	public String decode(String data) throws Exception {
		Cipher deCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
		deCipher.init(Cipher.DECRYPT_MODE, key, iv);
		BASE64Decoder base64Decoder = new BASE64Decoder();
		byte[] pasByte = deCipher.doFinal(base64Decoder.decodeBuffer(data));
		return new String(pasByte, "UTF-8");
	}

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

		CryptoTools tools = new CryptoTools();
		System.out.println("加密:" + tools.encode("天下"));
		System.out.println("解密:" + tools.decode(tools.encode("天下")));
	}

}

 

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方法二:通过java的key来生成对应于.NET的key和VI

C#:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

  
using System.Configuration;   
using System.Web;   
using System.Security.Cryptography;   
using System.IO;   
  

namespace DES
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string jiami = textBox1.Text;
           textBox2.Text= DESEnCode(jiami, "11111111");
        }

          public static string DES_Key = "11111111";  
 
    #region DESEnCode DES加密   
    public static string DESEnCode(string pToEncrypt, string sKey)   
    {
       // string pToEncrypt1 = HttpContext.Current.Server.UrlEncode(pToEncrypt);   
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();
        byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);   
  
        //建立加密对象的密钥和偏移量    
        //原文使用ASCIIEncoding.ASCII方法的GetBytes方法    
        //使得输入密码必须输入英文文本    
        des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);   
        des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);   
        MemoryStream ms = new MemoryStream();   
        CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);   
  
        cs.Write(inputByteArray, 0, inputByteArray.Length);   
        cs.FlushFinalBlock();   
  
        StringBuilder ret = new StringBuilder();   
        foreach (byte b in ms.ToArray())   
        {   
            ret.AppendFormat("{0:X2}", b);   
        }   
        ret.ToString();   
        return ret.ToString();   
    }  
    #endregion  
 
    #region DESDeCode DES解密   
    public static string DESDeCode(string pToDecrypt, string sKey)   
    {   
        //    HttpContext.Current.Response.Write(pToDecrypt + "<br>" + sKey);   
        //    HttpContext.Current.Response.End();   
        DESCryptoServiceProvider des = new DESCryptoServiceProvider();   
  
        byte[] inputByteArray = new byte[pToDecrypt.Length / 2];   
        for (int x = 0; x < pToDecrypt.Length / 2; x++)   
        {   
            int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));   
            inputByteArray[x] = (byte)i;   
        }   
  
        des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);   
        des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);   
       MemoryStream ms = new MemoryStream();   
        CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);   
        cs.Write(inputByteArray, 0, inputByteArray.Length);   
        cs.FlushFinalBlock();   
  
        StringBuilder ret = new StringBuilder();   
  
       // return HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));
        return System.Text.Encoding.Default.GetString(ms.ToArray());  
    }  
    #endregion   

    private void button2_Click(object sender, EventArgs e)
    {
        string jiemi = textBox2.Text;
        textBox3.Text = DESDeCode(jiemi,"11111111");
    }
  
  
    }
}

 

java:

  

import javax.crypto.Cipher;   
import javax.crypto.SecretKey;   
import javax.crypto.SecretKeyFactory;   
import javax.crypto.spec.DESKeySpec;   
import javax.crypto.spec.IvParameterSpec;   
  
  
public class Des {   
    private byte[] desKey;   
  
       
    //解密数据   
    public static String decrypt(String message,String key) throws Exception {   
            
            byte[] bytesrc =convertHexString(message);      
            Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");       
            DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));      
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");      
            SecretKey secretKey = keyFactory.generateSecret(desKeySpec);      
            IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));   
                   
            cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);         
             
            byte[] retByte = cipher.doFinal(bytesrc);        
            return new String(retByte);    
    }   
  
    public static byte[] encrypt(String message, String key)   
            throws Exception {   
        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");   
  
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));   
  
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");   
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);   
        IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));   
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);   
  
        return cipher.doFinal(message.getBytes("UTF-8"));   
    }   
       
    public static byte[] convertHexString(String ss)    
    {    
    byte digest[] = new byte[ss.length() / 2];    
    for(int i = 0; i < digest.length; i++)    
    {    
    String byteString = ss.substring(2 * i, 2 * i + 2);    
    int byteValue = Integer.parseInt(byteString, 16);    
    digest[i] = (byte)byteValue;    
    }    
  
    return digest;    
    }    
  
  
    public static void main(String[] args) throws Exception {   
        String key = "11111111";   
        String value="aa";   
        String jiami=java.net.URLEncoder.encode(value, "utf-8").toLowerCase();   
           
        System.out.println("加密数据:"+jiami);   
        String a=toHexString(encrypt(jiami, key)).toUpperCase();   
           
       
        System.out.println("加密后的数据为:"+a);   
        String b=java.net.URLDecoder.decode(decrypt(a,key), "utf-8") ;   
        System.out.println("解密后的数据:"+b);   
  
    }   
  
       
    public static String toHexString(byte b[]) {   
        StringBuffer hexString = new StringBuffer();   
        for (int i = 0; i < b.length; i++) {   
            String plainText = Integer.toHexString(0xff & b[i]);   
            if (plainText.length() < 2)   
                plainText = "0" + plainText;   
            hexString.append(plainText);   
        }   
           
        return hexString.toString();   
    }   
  
}