WebService 的创建及安全调用

public class Encrypt
   {

       //密钥
       private static string sKey = "A3F2569E6SJEAWBCJOTY45DYQWF88H1Y";
       //矢量，矢量可以为空
       private static string sIV = "qdCy6X+aKLw=";

       /// <summary>
       /// MD5加密
       /// </summary>
       /// <param name="str">要加密的串</param>
       /// <param name="code">16 16位加密,32 32位加密</param>
       /// <returns></returns>
       public static string MD5(string str,int code)
       {
           str = str.ToLower();
           if (code == 16) //16位MD5加密（取32位加密的9~25字符） 
           {
               return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str,"MD5").ToLower().Substring(8,16);
           }

           if (code == 32) //32位加密 
           {
               return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str,"MD5").ToLower();
           }

           return "00000000000000000000000000000000";
       }


       /// <summary>
       /// 加密
       /// </summary>
       /// <param name="Value"></param>
       /// <returns></returns>
       public static string EncryptString(string value)
       {
           if (!String.IsNullOrEmpty(value))
           {
               SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvider();
               ICryptoTransform ct;
               MemoryStream ms;
               CryptoStream cs;
               byte[] byt;
               mCSP.Key = Convert.FromBase64String(sKey);
               mCSP.IV = Convert.FromBase64String(sIV);
               //指定加密的运算模式
               mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;
               //获取或设置加密算法的填充模式
               mCSP.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
               ct = mCSP.CreateEncryptor(mCSP.Key,mCSP.IV);
               byt = Encoding.UTF8.GetBytes(value);
               ms = new MemoryStream();
               cs = new CryptoStream(ms,ct,CryptoStreamMode.Write);
               cs.Write(byt,byt.Length);
               cs.FlushFinalBlock();
               cs.Close();
               return Convert.ToBase64String(ms.ToArray());
           }
           else
           {
               return "";
           }
       }


       /// <summary>
       /// 解密
       /// </summary>
       /// <param name="Source"></param>
       /// <returns></returns>
       public static string DecrypString(string source)
       {
           if (!String.IsNullOrEmpty(source))
           {
               try
               {
                   SymmetricAlgorithm mCSP = new TripleDESCryptoServiceProvider();
                   byte[] bytIn = Convert.FromBase64String(source);
                   MemoryStream ms = new MemoryStream(bytIn,bytIn.Length);
                   mCSP.Mode = System.Security.Cryptography.CipherMode.ECB;
                   //获取或设置加密算法的填充模式
                   mCSP.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
                   mCSP.Key = Convert.FromBase64String(sKey);
                   mCSP.IV = Convert.FromBase64String(sIV);
                   ICryptoTransform encrypto = mCSP.CreateDecryptor(mCSP.Key,mCSP.IV);
                   CryptoStream cs = new CryptoStream(ms,encrypto,CryptoStreamMode.Read);
                   StreamReader sr = new StreamReader(cs);
                   return sr.ReadToEnd();
               }
               catch
               {
                   return "";
               }
           }
           else
           {
               return "";

           }
       }

   }

public class WebServiceStudy : System.Web.Services.WebService {

    public WebServiceSoaps myServiceSoap = new WebServiceSoaps();//调用WebServiceSoaps类进行身份验证
    //验证名
    string StrName = System.Configuration.ConfigurationManager.AppSettings["WebServiceTest"].Split(',')[0].ToString();
    //验证密码
    string StrPwd = System.Configuration.ConfigurationManager.AppSettings["WebServiceTest"].Split(',')[1].ToString();

    public WebServiceStudy () {

        //如果使用设计的组件，请取消注释以下行 
        //InitializeComponent(); 
    }

    [System.Web.Services.Protocols.SoapHeader("myServiceSoap")]
    [WebMethod]
    public DataTable WervicesTest()
    {
        DataTable dt = new DataTable("Test");
        dt.Columns.Add(new DataColumn("col1",typeof(System.String)));
        dt.Columns.Add(new DataColumn("col2",typeof(System.String)));
        if (myServiceSoap.CheckUserName.Equals(StrName) && Encrypt.DecrypString(myServiceSoap.CheckPwd).Equals(StrPwd))
        {
            for (int i = 0; i < 5; i++)
            {
                DataRow dr = dt.NewRow();
                dr[0] = i.ToString();
                dr[1] = i.ToString();
                dt.Rows.Add(dr);
            }
        }
        else
        {
            //logWebServices.Info("未知用户" + System.Web.HttpContext.Current.Request.UserHostAddress);
            DataRow dr = dt.NewRow();
            dr[0] = "伙计，你没有权限!";
            dr[1] = " It's only a test!";
            dt.Rows.Add(dr);
        }

        return dt;
    }
    
}