.NET加密与解密类
using System;
using System.Security.Cryptography;?
using System.Text;
namespace Common.DES
{
?/// <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, "liyanling");
??}
??/// <summary>
??/// 加密数据
??/// </summary>
??/// <param name="Text"></param>
??/// <param name="sKey"></param>
??/// <returns></returns>
??public static string Encrypt(string Text,string sKey)
??{
???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();
??}
??#endregion
??
??#region ========解密========
??
?
??????? /// <summary>
??????? /// 解密
??????? /// </summary>
??????? /// <param name="Text"></param>
??????? /// <returns></returns>
??public static string Decrypt(string Text)
??{
??????????? return Decrypt(Text, "liyanling");
??}
??/// <summary>
??/// 解密数据
??/// </summary>
??/// <param name="Text"></param>
??/// <param name="sKey"></param>
??/// <returns></returns>
??public static string Decrypt(string Text,string sKey)
??{
???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());
??}
?
??#endregion
?}
}
?
