安全--加密

两个文本框(用户名密码),一个提交按扭,点击按扭时进行加密及注册处理!
cs如下:

using  System.Drawing;
using  System.Web;
using  System.Web.SessionState;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.HtmlControls;
using  System.Data.SqlClient;
using  System.Security.Cryptography;
using  System.Security;
using  System.IO;
using  System.Text;
namespace  Security.Formsauth
{
    
/// <summary>
    
/// Reg 的摘要说明。
    
/// </summary>

    public class Reg : System.Web.UI.Page
    
{
        
protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
        
protected System.Web.UI.WebControls.TextBox tbPass;
        
protected System.Web.UI.WebControls.Label Label2;
        
protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
        
protected System.Web.UI.WebControls.TextBox tbName;
        
protected System.Web.UI.WebControls.Label Label1;
        
protected System.Web.UI.WebControls.Label Label3;
        
protected System.Web.UI.WebControls.Button btnReg;
    
        
private void Page_Load(object sender, System.EventArgs e)
        
{
            
// 在此处放置用户代码以初始化页面
        }


        
Web Form Designer generated code

        
private void btnReg_Click(object sender, System.EventArgs e)
        
{
            SqlConnection con 
= new SqlConnection();
            con.ConnectionString 
= System.Configuration.ConfigurationSettings.AppSettings["DSN"];
            con.Open();
        
            
//以下得到hash和salt加密串
            const int salSize = 16;
            
// step 1: create some entropy for use as the salt
            RandomNumberGenerator rng = RandomNumberGenerator.Create();
            
byte[] salt = new byte[ salSize ];
            rng.GetBytes(salt);


            
// step 2: turn the password into bytes
            byte[] secret = Encoding.Unicode.GetBytes(tbPass.Text);


            
// step 3: create the hash
            HashAlgorithm hashAlg = SHA1.Create();
            
using(CryptoStream cs = new CryptoStream(Stream.Null, hashAlg, CryptoStreamMode.Write)) 
            
{
                cs.Write(secret, 
0, secret.Length);
                cs.Write(salt, 
0, salt.Length);
                cs.FlushFinalBlock();
            }

            
string strHash = Convert.ToBase64String(hashAlg.Hash);
            
string strSalt = Convert.ToBase64String(salt);
            
//
            string strSql = "insert into formsUserInfo values(@username,@hashPass,@saltPass)";
            SqlParameter sqlpUser 
= new SqlParameter("@username",SqlDbType.NVarChar,64);
            sqlpUser.Value 
= tbName.Text;
            SqlParameter sqlpPassHash 
= new SqlParameter("@hashPass",SqlDbType.NVarChar,50);
            SqlParameter sqlpPassSalt 
= new SqlParameter("@saltPass",SqlDbType.NVarChar,50);
            sqlpPassHash.Value 
= strHash;
            sqlpPassSalt.Value 
= strSalt;
            SqlCommand com 
= new SqlCommand(strSql,con);
            com.Parameters.Add(sqlpUser);
            com.Parameters.Add(sqlpPassHash);
            com.Parameters.Add(sqlpPassSalt);
            com.ExecuteNonQuery();
            con.Close();
            Response.Write(
"<script language='javascript'>alert('注册成功!')</script>");

        }

    }

}

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