using System;
using System.Text;
using System.Security.Cryptography;
namespace DotNet.Utilities
{
  /// <summary>
  /// 得到隨機安全碼（哈希加密）。
  /// </summary>
  public class HashEncode
  {
    public HashEncode()
    {
      //
      // TODO: 在此處添加構造函數(shù)邏輯
      //
    }
    /// <summary>
    /// 得到隨機哈希加密字符串
    /// </summary>
    /// <returns></returns>
    public static string GetSecurity()
    {     
      string Security = HashEncoding(GetRandomValue());   
      return Security;
    }
    /// <summary>
    /// 得到一個隨機數(shù)值
    /// </summary>
    /// <returns></returns>
    public static string GetRandomValue()
    {     
      Random Seed = new Random();
      string RandomVaule = Seed.Next(1, int.MaxValue).ToString();
      return RandomVaule;
    }
    /// <summary>
    /// 哈希加密一個字符串，sharejs.com
    /// </summary>
    /// <param name="Security"></param>
    /// <returns></returns>
    public static string HashEncoding(string Security)
    {           
      byte[] Value;
      UnicodeEncoding Code = new UnicodeEncoding();
      byte[] Message = Code.GetBytes(Security);
      SHA512Managed Arithmetic = new SHA512Managed();
      Value = Arithmetic.ComputeHash(Message);
      Security = "";
      foreach(byte o in Value)
      {
        Security += (int) o + "O";
      }
      return Security;
    }
  }
}