帮忙将这段java代码翻译成C#,不胜感激！

能否具体一些，比如说 DES des = new DES(4564567899L);
这一句在C#里如何写，谢谢！

DES des = new DES(4564567899L);
这句话Java和C#是一样的，光从你帖出的这段代码来看Java和C#几乎一样，关键是DES类在Java中是怎么实现的。

在C#里运行时提示：无法创建抽象类或接口“System.Security.Cryptography.DES”的实例

能明白？using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;

namespace NetTrade
{
/// <summary>
/// Security 的摘要说明。
/// 类中URL及帐号加密使用了不同的KEY。调用URL加密过程如下：
///EIP.Framework.Security objSecurity = new EIP.Framework.Security();
///objSecurity.EncryptQueryString(''待加密的字符串'');
///解密:objSecurity.DecryptQueryString(''传递过来的参数);
/// </summary>
public class Security
{
  string _QueryStringKey = "yx139222"; //URL传输参数加密Key
  string _PassWordKey = "yx139222";  //PassWord加密Key

  public Security()
  {
   //
   // TODO: 在此处添加构造函数逻辑
   //
  }

  ///
  /// 加密URL传输的字符串
  ///
  ///
  ///
  public string EncryptQueryString(string QueryString)
  {
   return Encrypt(QueryString,_QueryStringKey);
  }

  ///
  /// 解密URL传输的字符串
  ///
  ///
  ///
  public string DecryptQueryString(string QueryString)
  {
   return Decrypt(QueryString,_QueryStringKey);
  }

  ///
  /// 加密帐号口令
  ///
  ///
  ///
  public string EncryptPassWord(string PassWord)
  {
   return Encrypt(PassWord,_PassWordKey);
  }

  ///
  /// 解密帐号口令
  ///
  ///
  ///
  public string DecryptPassWord(string PassWord)
  {
   return Decrypt(PassWord,_PassWordKey);
  }

  ///
  /// DEC 加密过程
  ///
  ///
  ///
  ///
  public string Encrypt(string pToEncrypt,string sKey)
  {
   DESCryptoServiceProvider des = new DESCryptoServiceProvider();  //把字符串放到byte数组中

   byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
   //byte[]  inputByteArray=Encoding.Unicode.GetBytes(pToEncrypt);

   des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);  //建立加密对象的密钥和偏移量
   des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);   //原文使用ASCIIEncoding.ASCII方法的GetBytes方法
   MemoryStream ms = new MemoryStream();     //使得输入密码必须输入英文文本
   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();
  }

  ///
  /// DEC 解密过程
  ///
  ///
  ///
  ///
  public string Decrypt(string pToDecrypt, string sKey)
  {
   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);  //建立加密对象的密钥和偏移量，此值重要，不能修改
   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();  //建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象

   return System.Text.Encoding.Default.GetString(ms.ToArray());
  }

  ///
  /// 检查己加密的字符串是否与原文相同
  ///
  ///
  ///
  ///
  ///
  public bool ValidateString(string EnString, string FoString, int Mode)
  {
   switch (Mode)
   {
    default:
    case 1:
     if (Decrypt(EnString,_QueryStringKey) == FoString.ToString())
     {
      return true;
     }
     else
     {
      return false;
     }
    case 2:
     if (Decrypt(EnString,_PassWordKey) == FoString.ToString())
     {
      return true;
     }
     else
     {
      return false;
     }
   }
  }

//以下为另外一种加解密方式，比较简单

  public string DecryptStr(string rs) //顺序减1解码
  {
   byte[] by=new byte[rs.Length];
   for(int i=0;i<=rs.Length-1;i++)
   {
    by[i]=(byte)((byte)rs[i]-1);
   }
   rs="";
   for(int i=by.Length-1;i>=0;i--)
   {
    rs+=((char)by[i]).ToString();
   }
   return rs;
  }

  public string EncryptStr(string rs) //倒序加1加密
  {
   byte[] by=new byte[rs.Length];
   for(int i=0;i<=rs.Length-1;i++)
   {
    by[i]=(byte)((byte)rs[i]+1);
   }
   rs="";
   for(int i=by.Length-1;i>=0;i--)
   {
    rs+=((char)by[i]).ToString();
   }
   return rs;
  }
}
}

自己改写了一段，但跟原java得出的结果不一致，不知何原因
        //加密
        public string encode(string s)
        {
            if (s == null)  return null;
            String res = "";            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] Keys = System.BitConverter.GetBytes(4564567899L);
            //DES des = new DES(getKey());
            byte space = 32;
            byte[] sBytes = Encoding.ASCII.GetBytes(s);
            //byte[] sBytes = Encoding.UTF8.GetBytes(s);
            int length = sBytes.Length ;
            int newLength = length + (8 - (length % 8)) % 8;
            byte[] newBytes = new byte[newLength];
            for (int i = 0; i < newLength; ++i)
            {
                if (i <= length - 1)
                {
                    newBytes[i] = sBytes[i];
                }
                else
                {
                    newBytes[i] = space;
                }}
            for (int i = 0; i < newLength / 8; ++i)
            {
                byte[] theBytes = new byte[8];
                for (int j = 0; j <= 7; ++j)
                {
                    theBytes[j] = newBytes[(8 * i + j)];
                }

                //long x = des.bytes2long(theBytes);
                //long x = Convert.ToInt64(theBytes);
                byte[] result = new byte[8];

               //des.long2bytes(des.encrypt(x), result);
               ////////////////////////////////////////////////////////////
                MemoryStream mStream = new MemoryStream();
                CryptoStream cStream = new CryptoStream(mStream, des.CreateEncryptor(theBytes, Keys), CryptoStreamMode.Write);
                cStream.Write(sBytes, 0, sBytes.Length);
                //cStream.Write(theBytes, 0, theBytes.Length);
                cStream.FlushFinalBlock();
                result =  mStream.ToArray();                byte[] doubleResult = new byte[16];
                for (int j = 0; j < 8; ++j)
                {
                    doubleResult[(2 * j)] = (byte)((((char)result[j] & 0xF0) >> '4') + 97);
                    doubleResult[(2 * j + 1)] = (byte)(((char)result[j] & 0xF) + 'a');
                }
               res = res + System.Text.Encoding.Default.GetString(doubleResult);
                //res = res + BitConverter.ToString(doubleResult) ;
            }
            return res.Trim();
        }

调试易

帮忙将这段java代码翻译成C#,不胜感激！

解决方案 »