C# 字符串DES加/解密与MD5加密类
C#源码，用.Net封装的类库写的加密和解密的方法，很容易转换成VB.Netusing System;using System.IO;using System.Windows.Forms;using System.Collections.Generic;using System.Text;using System.Security.Cryptography;namespace MyDes{/// <summary>/// DES加/解密与MD5加密/// </summary>public class My_Des{#region 私有属性/// <summary>/// MD5加密的字符串/// </summary>private string md5Str = null;/// <summary>/// DES加密的字符串/// </summary>private string encryptStr = null;/// <summary>/// DES解密的字符串/// </summary>private string decryptStr = null;/// <summary>/// DES密匙/// </summary>private string mydesKey = null;/// <summary>/// 返回的字符串/// </summary>private string mydesStr = null;/// <summary>/// 错误信息/// </summary>private string messAge = null;#endregion#region 公共属性/// <summary>/// MD5加密字符串/// </summary>public string MD5Str{get { return md5Str; }set { md5Str = value; }}/// <summary>/// DES加密的字符串/// </summary>public string EncryptStr{get { return encryptStr; }set { encryptStr = value; }}/// <summary>///DES 解密的字符串/// </summary>public string DecryptStr{get { return decryptStr; }set { decryptStr = value; }}/// <summary>/// DES密匙/// </summary>public string MyDesKey{get { return mydesKey; }set { mydesKey = value; }}/// <summary>/// 返回的字符串/// </summary>public string MyDesStr{get { return mydesStr; }set { mydesStr = value; }}/// <summary>/// 错误信息/// </summary>public string Message{get { return messAge; }set { messAge = value; }}#endregion#region 公共方法/// <summary>/// 执行DES加密/// </summary>public void DesEncrypt(){try{byte[] MyStr_E = Encoding.UTF8.GetBytes(this.encryptStr);byte[] MyKey_E = Encoding.UTF8.GetBytes(this.mydesKey);DESCryptoServiceProvider MyDes_E = new DESCryptoServiceProvider();MyDes_E.Key = MyKey_E;MyDes_E.IV = MyKey_E;MemoryStream MyMem_E = new MemoryStream();CryptoStream MyCry_E = new CryptoStream(MyMem_E, MyDes_E.CreateEncryptor(), CryptoStreamMode.Write);MyCry_E.Write(MyStr_E, 0, MyStr_E.Length);MyCry_E.FlushFinalBlock();MyCry_E.Close();this.mydesStr = Convert.ToBase64String(MyMem_E.ToArray());}catch (Exception Error){this.messAge = "DES加密出错："+Error.Message;}}/// <summary>/// 执行DES解密/// </summary>public void DesDecrypt(){try{byte[] MyStr_D = Convert.FromBase64String(this.decryptStr);byte[] MyKey_D = Encoding.UTF8.GetBytes(this.mydesKey);DESCryptoServiceProvider MyDes_D = new DESCryptoServiceProvider();MyDes_D.Key = MyKey_D;MyDes_D.IV = MyKey_D;MemoryStream MyMem_D = new MemoryStream();CryptoStream MyCry_D = new CryptoStream(MyMem_D, MyDes_D.CreateDecryptor(), CryptoStreamMode.Write); MyCry_D.Write(MyStr_D, 0, MyStr_D.Length);MyCry_D.FlushFinalBlock();MyCry_D.Close();this.mydesStr = Encoding.UTF8.GetString(MyMem_D.ToArray());}catch (Exception Error){this.messAge ="DES解密出错：" +Error.Message;}}/// <summary>/// 执行MD5加密/// </summary>public void MD5JiaMi(){MD5CryptoServiceProvider MyMD5 = new MD5CryptoServiceProvider();try{Byte[] MyMD5_Str = MyMD5.ComputeHash(Encoding.UTF8.GetBytes(this.md5Str));this.MyDesStr = Encoding.UTF8.GetString(MyMD5_Str);}catch (Exception Error){this.messAge ="MD5加密出错："+ Error.Message;}}#endregion}}
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