這個(gè)C#類封裝的DES加密解密，可以使用默認(rèn)秘鑰進(jìn)行加密、解密，也可以自定義秘鑰進(jìn)行加密、解密，調(diào)用簡(jiǎn)單方便。

示例一：

using System;

using System.Security.Cryptography;

using System.Text;

namespace DotNet.Utilities

{

///

/// DES加密/解密類。

///

public class DESEncrypt

{

public DESEncrypt()

{

}

#region ========加密========

///

/// 加密

///

///

///

public static string Encrypt(string Text)

{

return Encrypt(Text,"sharejs.com");

}

///

/// 加密數(shù)據(jù)

///

///

///

///

public static string Encrypt(string Text,string sKey)

{

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

byte[] inputByteArray;

inputByteArray=Encoding.Default.GetBytes(Text);

des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));

des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));

System.IO.MemoryStream ms=new System.IO.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 ========解密========

///

/// 解密

///

///

///

public static string Decrypt(string Text)

{

return Decrypt(Text,"sharejs.com");

}

///

/// 解密數(shù)據(jù)

///

///

///

///

public static string Decrypt(string Text,string sKey)

{

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

int len;

len=Text.Length/2;

byte[] inputByteArray = new byte[len];

int x,i;

for(x=0;x

{

i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);

inputByteArray[x]=(byte)i;

}

des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));

des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));

System.IO.MemoryStream ms=new System.IO.MemoryStream();

CryptoStream cs=new CryptoStream(ms,des.CreateDecryptor(),CryptoStreamMode.Write);

cs.Write(inputByteArray,0,inputByteArray.Length);

cs.FlushFinalBlock();

return Encoding.Default.GetString(ms.ToArray());

}

#endregion

}

}

示例二：

///

public class Help_Encrypt

{

///

///

///

///

public static string Encode(string str, string key)

{

try

{

DESCryptoServiceProvider provider = new DESCryptoServiceProvider();

provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));

provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));

byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(str);

MemoryStream stream = new MemoryStream();

CryptoStream stream2 = new CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write);

stream2.Write(bytes, 0, bytes.Length);

stream2.FlushFinalBlock();

StringBuilder builder = new StringBuilder();

foreach (byte num in stream.ToArray())

{

builder.AppendFormat("{0:X2}", num);

}

stream.Close();

return builder.ToString();

}

catch (Exception) { return "xxxx"; }

}

///

///

///

///

public static string Decode(string str, string key)

{

try

{

DESCryptoServiceProvider provider = new DESCryptoServiceProvider();

provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));

provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));

byte[] buffer = new byte[str.Length / 2];

for (int i = 0; i < (str.Length / 2); i++)

{

int num2 = Convert.ToInt32(str.Substring(i * 2, 2), 0x10);

buffer[i] = (byte)num2;

}

MemoryStream stream = new MemoryStream();

CryptoStream stream2 = new CryptoStream(stream, provider.CreateDecryptor(), CryptoStreamMode.Write);

stream2.Write(buffer, 0, buffer.Length);

stream2.FlushFinalBlock();

stream.Close();

return Encoding.GetEncoding("GB2312").GetString(stream.ToArray());

}

catch (Exception) { return ""; }

}

}

JAVADES加密解密類

package com.bgxt.messages;

import java.io.UnsupportedEncodingException;

import java.security.*;

import javax.crypto.Cipher;

import javax.crypto.SecretKey;

import javax.crypto.SecretKeyFactory;

import javax.crypto.spec.DESKeySpec;

import javax.crypto.spec.IvParameterSpec;

/**

* 字符串工具集合

* @author Liudong

*/

public class StringUtils {

private static final String PASSWORD_CRYPT_KEY = XmlUtil.getConfig().getPasswdKey().substring(0,8);

//private final static String DES = "DES";

//private static final byte[] desKey;

//解密數(shù)據(jù)

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 String encrypt(String value){

String result="";

try{

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

result=toHexString(encrypt(value, PASSWORD_CRYPT_KEY)).toUpperCase();

}catch(Exception ex){

ex.printStackTrace();

return "";

}

return result;

}

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 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();

}

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

String value="01";

System.out.println("加密數(shù)據(jù):"+value);

System.out.println("密碼為:"+XmlUtil.getConfig().getPasswdKey());

String a=encrypt( value);

System.out.println("加密后的數(shù)據(jù)為:"+a);

}

}

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