.NET与 java通用的3DES加密解密方法

C#代码

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

          public static string DES_Key = "";    

    #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, , 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 / ];
        for (int x = ; x < pToDecrypt.Length / ; x++)
        {
            int i = (Convert.ToInt32(pToDecrypt.Substring(x * , ), ));
            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, , 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,"");
    }  

Java代码

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();
    }     

}    

摘抄:http://www.cnblogs.com/DrWang/archive/2011/03/30/2000124.html

https://en.wikipedia.org/wiki/Initialization_vector