<script type="text/javascript">function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.com/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'keyit','scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes'));keyit.focus();}</script> using System;
using System.Text;
using System.Globalization;
using System.Security.Cryptography;
using System.Windows.Forms;
namespace Jh.Encrypts
{
public class JhEncrypt
{
/// <summary>
/// 构造方法
/// </summary>
public JhEncrypt()
{
}
/// <summary>
/// 使用缺省密钥字符串加密
/// </summary>
/// <param name="original"> 明文 </param>
/// <returns> 密文 </returns>
public static string Encrypt( string original)
{
return Encrypt(original, " JASONHEUNG " );
}
/// <summary>
/// 使用缺省密钥解密
/// </summary>
/// <param name="original"> 密文 </param>
/// <returns> 明文 </returns>
public static string Decrypt( string original)
{
return Decrypt(original, " JASONHEUNG " ,System.Text.Encoding.Default);
}
/// <summary>
/// 使用给定密钥解密
/// </summary>
/// <param name="original"> 密文 </param>
/// <param name="key"> 密钥 </param>
/// <returns> 明文 </returns>
public static string Decrypt( string original, string key)
{
return Decrypt(original,key,System.Text.Encoding.Default);
}
/// <summary>
/// 使用缺省密钥解密,返回指定编码方式明文
/// </summary>
/// <param name="original"> 密文 </param>
/// <param name="encoding"> 编码方式 </param>
/// <returns> 明文 </returns>
public static string Decrypt( string original,Encoding encoding)
{
return Decrypt(original, " JASONHEUNG " ,encoding);
}
/// <summary>
/// 使用给定密钥加密
/// </summary>
/// <param name="original"> 原始文字 </param>
/// <param name="key"> 密钥 </param>
/// <param name="encoding"> 字符编码方案 </param>
/// <returns> 密文 </returns>
public static string Encrypt( string original, string key)
{
byte [] buff = System.Text.Encoding.Default.GetBytes(original);
byte [] kb = System.Text.Encoding.Default.GetBytes(key);
return Convert.ToBase64String(Encrypt(buff,kb));
}
/// <summary>
/// 使用给定密钥解密
/// </summary>
/// <param name="encrypted"> 密文 </param>
/// <param name="key"> 密钥 </param>
/// <param name="encoding"> 字符编码方案 </param>
/// <returns> 明文 </returns>
public static string Decrypt( string encrypted, string key,Encoding encoding)
{
byte [] buff = Convert.FromBase64String(encrypted);
byte [] kb = System.Text.Encoding.Default.GetBytes(key);
return encoding.GetString(Decrypt(buff,kb));
}
/// <summary>
/// 生成MD5摘要
/// </summary>
/// <param name="original"> 数据源 </param>
/// <returns> 摘要 </returns>
public static byte [] MakeMD5( byte [] original)
{
MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
byte [] keyhash = hashmd5.ComputeHash(original);
hashmd5 = null ;
return keyhash;
}
/// <summary>
/// 使用给定密钥加密
/// </summary>
/// <param name="original"> 明文 </param>
/// <param name="key"> 密钥 </param>
/// <returns> 密文 </returns>
public static byte [] Encrypt( byte [] original, byte [] key)
{
TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
des.Key = MakeMD5(key);
des.Mode = CipherMode.ECB;
return des.CreateEncryptor().TransformFinalBlock(original, 0 , original.Length);
}
/// <summary>
/// 使用给定密钥解密数据
/// </summary>
/// <param name="encrypted"> 密文 </param>
/// <param name="key"> 密钥 </param>
/// <returns> 明文 </returns>
public static byte [] Decrypt( byte [] encrypted, byte [] key)
{
TripleDESCryptoServiceProvider des = new TripleDESCryptoServiceProvider();
des.Key = MakeMD5(key);
des.Mode = CipherMode.ECB;
return des.CreateDecryptor().TransformFinalBlock(encrypted, 0 , encrypted.Length);
}
/// <summary>
/// 使用给定密钥加密
/// </summary>
/// <param name="original"> 原始数据 </param>
/// <param name="key"> 密钥 </param>
/// <returns> 密文 </returns>
public static byte [] Encrypt( byte [] original)
{
byte [] key = System.Text.Encoding.Default.GetBytes( " JASONHEUNG " );
return Encrypt(original,key);
}
/// <summary>
/// 使用缺省密钥解密数据
/// </summary>
/// <param name="encrypted"> 密文 </param>
/// <param name="key"> 密钥 </param>
/// <returns> 明文 </returns>
public static byte [] Decrypt( byte [] encrypted)
{
byte [] key = System.Text.Encoding.Default.GetBytes( " JASONHEUNG " );
return Decrypt(encrypted,key);
}
}
}
