using System;

namespace UcAspClass
{
    /// <summary>
    /// Encrypt 密码加密算法
    /// http://www.hzren.net  http://www.ucasp.net
    /// 作者：QQ 36279010
    /// </summary>
    public class Encrypt
    {
        public Encrypt()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        public static string encrypt(string word)
        {
            string Password=null;
            int CodeLen=30;
            int CodeSpace;
            double NewCode;
            byte[] chr={21};
            CodeSpace=CodeLen-word.Length;
            if(CodeSpace>=1)
            {
                for(int i=0;i<CodeSpace;i++)
                {
                    word=word+System.Text.Encoding.Default.GetChars(chr)[0].ToString();
                }
            }
            NewCode=1;
            int Been;
            for(int i=0;i<CodeLen;i++)
            {
                Been=CodeLen+System.Text.Encoding.Default.GetBytes(word)[i]*(i+1);
                
                NewCode=NewCode*Been;                
            }
            word=NewCode.ToString();
            string newcode=null;
            for(int i=0;i<=word.Length-3;i++)
            {
                newcode=newcode+Hex(word.Substring(i,3));
            }
            newcode=newcode=newcode+Hex(word.Substring(word.Length-2,2));
            newcode=newcode=newcode+Hex(word.Substring(word.Length-1,1));
            System.Web.HttpContext.Current.Response.Write(newcode);
            for(int i=19;i<newcode.Length-18;i=i+2)
            {
                Password=Password+newcode.Substring(i,1);
            }
            return Password;
            
        }

    /// <summary>
    /// Hex转换为16进制结果
    /// </summary>
    /// <param name="word">我懒数据转换就用了string 但是一定数值</param>
    /// <returns>16进制结果</returns>
        private static string Hex(string word)
        {
            string CfsCode="";
            for(int i=0;i<word.ToString().Length;i++)
            {
                CfsCode=CfsCode+System.Text.Encoding.Default.GetBytes(word.ToString())[i].ToString();
                
            }
            return Convert.ToInt64(CfsCode).ToString("X");
        }
    }
}