DES类C#仿真

最新推荐文章于 2025-08-04 06:20:51 发布

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#c# #string #byte #加密 #解密

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DES类C#仿真
using System;
using System.Text;
using System.Security.Cryptography;
using System.IO;

namespace Deposit
{
/// <summary>
/// DES 的摘要说明。
/// </summary>
public class DES
{
   public DES()
   {
    //
    // TODO: 在此处添加构造函数逻辑
    //
   }

//默认密钥向量
private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

//密钥
public string KeyValue="20070413";

   /// DES加密
   /// <param >待加密的字符串</param>
   /// <param >加密密钥,要求为8位</param>
   /// <returns>加密成功返回加密后的字符串，失败返回源串</returns>

   public string EncryptDES(string encryptString, string encryptKey)
   {
    try
    {
     byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8));
     byte[] rgbIV = Keys;
     byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
     DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
     MemoryStream mStream = new MemoryStream();
     CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
     cStream.Write(inputByteArray, 0, inputByteArray.Length);
     cStream.FlushFinalBlock();
     return Convert.ToBase64String(mStream.ToArray());
    }
    catch
    {
     //return encryptString;
     return "Encrypt Failed!";
    }
   }

   /// DES解密
   /// <param >待解密的字符串</param>
   /// <param >解密密钥,要求为8位,和加密密钥相同</param>
   /// <returns>解密成功返回解密后的字符串，失败返源串</returns>

   public string DecryptDES(string decryptString, string decryptKey)
   {
    try
    {
     byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey);
     byte[] rgbIV = Keys;
     byte[] inputByteArray = Convert.FromBase64String(decryptString);
     DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
     MemoryStream mStream = new MemoryStream();
     CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
     cStream.Write(inputByteArray, 0, inputByteArray.Length);
     cStream.FlushFinalBlock();
     return Encoding.UTF8.GetString(mStream.ToArray());
    }
    catch
    {
     //return decryptString;
     return "Decrypt Failed!";
    }
   }

}