author:吾爱乐乐 from:博客园
/**//**********************Created by Chen**************************
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using System;
using System.Text;
using System.Security;
using System.Security.Cryptography;
using System.IO;
namespace EncryptClasses
{
/**//// <summary>
/// 此处定义的是DES加密,为了便于今后的管理和维护
/// 请不要随便改动密码,或者改变了密码后请一定要
/// 牢记先前的密码,否则将会照成不可预料的损失
/// </summary>
public class DESEncrypt
{
"member fields"#region "member fields"
private string iv="12345678";
private string key="12345678";
private Encoding encoding=new UnicodeEncoding();
private DES des;
#endregion
/**//// <summary>
/// 构造函数
/// </summary>
public DESEncrypt()
{
des=new DESCryptoServiceProvider();
}
"propertys"#region "propertys"
/**//// <summary>
/// 设置加密密钥
/// </summary>
public string EncryptKey
{
get{return this.key;}
set
{
this.key=value;
}
}
/**//// <summary>
/// 要加密字符的编码模式
/// </summary>
public Encoding EncodingMode
{
get{return this.encoding;}
set{this.encoding=value;}
}
#endregion
"methods"#region "methods"
/**//// <summary>
/// 加密字符串并返回加密后的结果
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public string EncryptString(string str)
{
byte ivb=Encoding.ASCII.GetBytes(this.iv);
byte keyb=Encoding.ASCII.GetBytes(this.EncryptKey);//得到加密密钥
byte toEncrypt=this.EncodingMode.GetBytes(str);//得到要加密的内容
byte encrypted;
ICryptoTransform encryptor=des.CreateEncryptor(keyb,ivb);
MemoryStream msEncrypt=new MemoryStream();
CryptoStream csEncrypt=new CryptoStream(msEncrypt,encryptor,CryptoStreamMode.Write);
csEncrypt.Write(toEncrypt,0,toEncrypt.Length);
csEncrypt.FlushFinalBlock();
encrypted=msEncrypt.ToArray();
csEncrypt.Close();
msEncrypt.Close();
return this.EncodingMode.GetString(encrypted);
}
/**//// <summary>
/// 加密指定的文件,如果成功返回True,否则false
/// </summary>
/// <param name="filePath">要加密的文件路径</param>
/// <param name="outPath">加密后的文件输出路径</param>
public void EncryptFile(string filePath,string outPath)
{
bool isExist=File.Exists(filePath);
if(isExist)//如果存在
{
&nbs
