JAVA版本

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;

//解密數據

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 = "12345678";

String value="test1234 ";

String jiami=java.net.URLEncoder.encode(value, "utf-8").toLowerCase();

System.out.println("加密數據:"+jiami);

String a=toHexString(encrypt(jiami, key)).toUpperCase();

System.out.println("加密后的數據為:"+a);

String b=java.net.URLDecoder.decode(decrypt(a,key), "utf-8") ;

System.out.println("解密后的數據:"+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();

}

}

.NET版本

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

using System.Security.Cryptography;

using System.IO;

using System.Text;

public class TestDes{

//cookies加密密鑰

public static string DES_Key = "12345678";

#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 + "
" + 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()));

}

#endregion

public TestDes()

{

//

// TODO: 在此處添加構造函數邏輯

//

}

}

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