des加密解密JAVA与.NET互通实例

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 = "12345678";
    String value="test1234 ";
    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();
}

}

.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加密密钥
    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 + "<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++)
        {
            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: 在此处添加构造函数逻辑
        //
    }
}

原文地址：https://www.cnblogs.com/hnsongbiao/p/8301578.html