using System;

using System.Collections.Generic;

using System.Web;

using System.Web.Security;

using System.Security;

using System.Security.Cryptography;

using System.Text;

using System.IO;

/// <summary>

///MD5 的摘要说明

/// </summary>

public class MD5

{

public MD5()

{

//

//TODO: 在此处添加构造函数逻辑

//

}

// 本地加密密钥(公钥)

//public const string key = "jd74t5aeq234jl0i";

public const string key = "ZopW1Ege62hsTf32";

/// <summary>

/// 用MD5算法加密字符串

/// </summary>

/// <param name="srcString">要加密的字符串</param>

/// <returns>加密后的字符串</returns>

public static string Encrypt(string srcString)

{

srcString = srcString + key;

byte[] b = Encoding.Default.GetBytes(srcString);

b = new MD5CryptoServiceProvider().ComputeHash(b);

string ret = "";

for (int i = 0; i < b.Length; i++)

{

ret += b[i].ToString("x2").ToUpper();

}

return ret;

}

/// <summary>

/// 用MD5算法加密字符串（不带密钥）

/// </summary>

/// <param name="srcString">要加密的字符串</param>

/// <returns>加密后的字符串</returns>

public static string EncryptWithoutKey(string srcString, Encoding _encoding)

{

byte[] b = Encoding.UTF8.GetBytes(srcString);

byte[] a = Encoding.Convert(Encoding.UTF8, _encoding, b);

b = new MD5CryptoServiceProvider().ComputeHash(a);

string ret = "";

for (int i = 0; i < b.Length; i++)

{

ret += b[i].ToString("x2").ToUpper();

}

return ret;

}

}