Java和C#交叉加密解密方法（DES）

看过网上许多这种Java和.net交叉加密解密的方法，杂七杂八的，让人看得很不明了，经过整理和调试后，决定把代码贴上来，一来提供给有需要的朋友作参考，二来给自己留下个脚印，以免以后有用得着的地方。我不知道这种加密解密的安全性可靠还是不可靠，但至少实现了Java和C#.net的交叉加密解密方法，代码如下：

 Java类：

import javax.crypto.Cipher;   
import javax.crypto.SecretKey;   
import javax.crypto.SecretKeyFactory;   
import javax.crypto.spec.DESKeySpec;   
import javax.crypto.spec.IvParameterSpec;   
  
public class DESCryptUtil {   
    private static final String key = "20100728";   
       
    // 解密数据   
    public static String decrypt(String message) throws Exception {   
        byte[] bytesrc = stringToBytes(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, "UTF-8");   
    }   
  
    //加密数据   
    public static byte[] encrypt(String message) 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"));   
    }   
  
    //String转Byte数组   
    public static byte[] stringToBytes(String temp) {   
        byte digest[] = new byte[temp.length() / 2];   
        for (int i = 0; i < digest.length; i++) {   
            String byteString = temp.substring(2 * i, 2 * i + 2);   
            int byteValue = Integer.parseInt(byteString, 16);   
            digest[i] = (byte) byteValue;   
        }   
  
        return digest;   
    }   
       
    //Byte数组转String   
    public static String bytesToString(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();   
    }   
  
    public static void main(String[] args) throws Exception {   
        String key = "20100728";   
        String value = "阿\"飞";   
        System.out.println("加密的数据:" + value);   
        String a = bytesToString(encrypt(value)).toUpperCase();   
        System.out.println("加密后的数据:" + a);     
        String b = decrypt(a);   
        System.out.println("解密后的数据:" + b);   
        System.out.println(b.length());   
    }   
}  

 

 C#代码：

using System;   
using System.Collections.Generic;   
using System.ComponentModel;   
using System.Data;   
using System.Drawing;   
using System.Text;   
using System.Windows.Forms;   
using System.Security.Cryptography;   
using System.Configuration;      
using System.Web;     
using System.IO;   
  
namespace DES   
{   
    public partial class Form1 : Form   
    {   
        private string DES_Key = "20100728";     
  
        public Form1()   
        {   
            InitializeComponent();   
        }   
  
        private void button1_Click(object sender, EventArgs e)   
        {   
            string jiami = textBox3.Text;   
            this.textBox1.Text = DESEnCode(jiami);   
        }   
  
        private void button2_Click(object sender, EventArgs e)   
        {   
            string jiemi = textBox1.Text;   
            textBox2.Text = DESDeCode(jiemi);   
        }   
  
        #region DESEnCode DES加密   
        public string DESEnCode(string pToEncrypt)   
        {      
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();   
            byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);   
     
            des.Key = ASCIIEncoding.ASCII.GetBytes(DES_Key);   
            des.IV = ASCIIEncoding.ASCII.GetBytes(DES_Key);   
            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);   
            }   
            return ret.ToString();   
        }   
        #endregion   
  
        #region DESDeCode DES解密   
        public string DESDeCode(string pToDecrypt)   
        {     
            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(DES_Key);   
            des.IV = ASCIIEncoding.ASCII.GetBytes(DES_Key);   
            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 System.Text.Encoding.UTF8.GetString(ms.ToArray());   
        }   
        #endregion   
  
    }   
}