ASP.NET URL加密解密

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URL加密解密

2014/7/8童正刚整理

使用说明：

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string aaa="127893456中国第三方斯蒂芬地方是sdgfdsfsdf适当放松放松45。。。。。222@@！@#！@#！@￥《《》》（）&&（";

Response.Write(Encode(aaa)+"</br >");

stringbbb = Encode(aaa);

Response.Write(Decode(bbb));

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///<summary>

///加密

///</summary>

///<paramname="str"></param>

///<paramname="key"></param>

///<returns></returns>

publicstaticstringEncode(string str,stringkey)

{

DESCryptoServiceProvider provider =newDESCryptoServiceProvider();

provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));

provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));

byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(str);

MemoryStreamstream =new MemoryStream();

CryptoStream stream2 =new CryptoStream(stream, provider.CreateEncryptor(),CryptoStreamMode.Write);

stream2.Write(bytes, 0,bytes.Length);

stream2.FlushFinalBlock();

StringBuilder builder =new StringBuilder();

foreach(byte numinstream.ToArray())

{

builder.AppendFormat("{0:X2}",num);

}

stream.Close();

returnbuilder.ToString();

}

///<summary>

/// Des解密 GB2312

///</summary>

///<paramname="str">Desc string</param>

///<paramname="key">Key ,必须为8位</param>

///<returns></returns>

publicstaticstringDecode(string str,stringkey)

{

DESCryptoServiceProvider provider =newDESCryptoServiceProvider();

provider.Key = Encoding.ASCII.GetBytes(key.Substring(0, 8));

provider.IV = Encoding.ASCII.GetBytes(key.Substring(0, 8));

byte[]buffer = new byte[str.Length/ 2];

for(int i = 0; i < (str.Length / 2); i++)

{

int num2 = Convert.ToInt32(str.Substring(i* 2, 2), 0x10);

buffer[i] = (byte)num2;

}

MemoryStream stream =new MemoryStream();

CryptoStream stream2 =new CryptoStream(stream, provider.CreateDecryptor(),CryptoStreamMode.Write);

stream2.Write(buffer,0, buffer.Length);

stream2.FlushFinalBlock();

stream.Close();

returnEncoding.GetEncoding("GB2312").GetString(stream.ToArray());

}

* 调用方法

///<summary>

/// If don't input key , Use default key

/// Des加密 GB2312 :

///</summary>

///<paramname="str"></param>

///<returns></returns>

publicstaticstringEncode(string str)

{

return test.Encode(str, "Rainight");

}

///<summary>

///解密

///</summary>

///<paramname="str"></param>

///<returns></returns>

publicstaticstringDecode(string str)

{

return test.Decode(str, "Rainight");

}

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