.net数据加密

来源：互联网发布：篮球单循环赛制算法编辑：程序博客网时间：2024/04/30 03:42

using System;
using System.Security.Cryptography;
using System.Text;

namespace LanSheng.Utility
{
/// <summary>
/// DES加密/解密类。
/// </summary>
public class DESEncrypt
{
  public DESEncrypt()
  {
  }

  #region ========加密========

        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="Text"></param>
        /// <returns></returns>
  public static string Encrypt(string Text)
  {
   return Encrypt(Text,"KZZHJ");
  }
  /// <summary>
  /// 加密数据
  /// </summary>
  /// <param name="Text"></param>
  /// <param name="sKey"></param>
  /// <returns></returns>
  public static string Encrypt(string Text,string sKey)
  {
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                byte[] inputByteArray;
                inputByteArray = Encoding.Default.GetBytes(Text);
                des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
                des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                StringBuilder ret = new StringBuilder();
                foreach (byte b in ms.ToArray())
                {
                    ret.AppendFormat("{0:X2}", b);
                }
                return ret.ToString();
            }
            catch { return Text; }

  }

  #endregion

  #region ========解密========


        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="Text"></param>
        /// <returns></returns>
  public static string Decrypt(string Text)
  {
            return Decrypt(Text, "KZZHJ");
  }
  /// <summary>
  /// 解密数据
  /// </summary>
  /// <param name="Text"></param>
  /// <param name="sKey"></param>
  /// <returns></returns>
  public static string Decrypt(string Text,string sKey)
  {
            try
            {
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                int len;
                len = Text.Length / 2;
                byte[] inputByteArray = new byte[len];
                int x, i;
                for (x = 0; x < len; x++)
                {
                    i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
                    inputByteArray[x] = (byte)i;
                }
                des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
                des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                return Encoding.Default.GetString(ms.ToArray());
            }
            catch { return Text;}

  }

  #endregion

}
}