DES加密.net與java互解
直接上程式碼
.net如下：
======================================.net start======================================================
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Configuration;
using System.Data.SqlClient;
using System.Security.Cryptography;
using System.IO;
using System.Text;
namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
string data = "mybook"; //要加密的資料
string encodeStr = ""; //加密後文本
string decodeStr = ""; //解密後文本
Console.WriteLine("原文字：{0}", data);
encodeStr = DESEnCode(data, DES_Key);
Console.WriteLine("加密後文本：{0}", encodeStr);
decodeStr = DESDeCode(encodeStr, DES_Key);
Console.WriteLine("解密後文本：{0}", decodeStr);
Console.Read();
}
//cookies加密金鑰
public static string DES_Key = "suibianni";
#region DESEnCode DES加密
public static string DESEnCode(string pToEncrypt, string sKey)
{
// pToEncrypt = HttpContext.Current.Server.UrlEncode(pToEncrypt);
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);
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++)
{
string aa = pToDecrypt.Substring(x * 2, 2).ToString();
int i = (Convert.ToInt32(aa, 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 System.Text.Encoding.Default.GetString(ms.ToArray());
// return null;
//HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));
}
#endregion
}
}
======================================.net end======================================================
======================================java start======================================================
package com;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
public class DesUtil {
private byte[] desKey;
//解密資料
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 = "suibianni";
String value="mybook";
String jiami=java.net.URLEncoder.encode(value, "utf-8").toUpperCase();
System.out.println("加密資料:"+jiami);
System.out.println(encrypt(jiami, key));
String a=toHexString(encrypt(jiami, key)).toUpperCase();
System.out.println("加密後的資料為:"+a);
String b=java.net.URLDecoder.decode(decrypt(a,key), "utf-8") ;
System.out.println("解密後的資料:"+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();
}
}
======================================java end======================================================