📄 symmetricread.aspx

📁 asp.net技术内幕的书配源码

💻 ASPX

字号:

<%@ Page Language="C#" debug="true" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Security.Cryptography" %>

<script language="C#" runat=server>
const string DESKey = "ABCDEFGH";
const string DESIV = "HGFEDCBA";

void Page_Load(object sender, EventArgs e) {
	DESDecrypt();
}

byte[] Convert2ByteArray(string strInput) 
{
	int intCounter;
	char[] arrChar;
	
	arrChar = strInput.ToCharArray();
	byte[] arrByte = new byte[arrChar.Length];
	
	for (intCounter=0; intCounter <= arrByte.Length-1; intCounter++)
		arrByte[intCounter] = Convert.ToByte(arrChar[intCounter]);
		
	return arrByte;
}

void DESDecrypt()
{
	byte[] arrDESKey;
	byte[] arrDESIV;
	FileStream objFileStream;
	DESCryptoServiceProvider objDES;
	ICryptoTransform objDecryptor;
	CryptoStream objCryptoStream;

	arrDESKey = Convert2ByteArray( DESKey );
	arrDESIV = Convert2ByteArray( DESIV );
	objDES = new DESCryptoServiceProvider();
	objDecryptor = objDES.CreateDecryptor( arrDESKey, arrDESIV );
	objFileStream = new FileStream( MapPath( "secret.txt" ), FileMode.Open, FileAccess.Read );
	objCryptoStream = new CryptoStream( objFileStream, objDecryptor, CryptoStreamMode.Read );
	lblMessage.Text = new StreamReader( objCryptoStream ).ReadToEnd();
	objFileStream.Close();
}

</Script>

<html>
<head><title>SymmetricRead.aspx</title></head>
<body>

<h2>DES Decryption</h2>

<b>Decrypted Text:</b>
<p>
<asp:Label
  ID="lblMessage"
  Runat="Server" />

</body>
</html>

⌨️ 快捷键说明

复制代码 Ctrl + C

搜索代码 Ctrl + F

全屏模式 F11

切换主题 Ctrl + Shift + D

显示快捷键 ?

增大字号 Ctrl + =

减小字号 Ctrl + -