asp.net 加密连接串（摘录）

命令提示符里

加密：

aspnet_regiis -pef connectionStrings

E:\Project\Test\TestEncrptConnectionString\TestEncrptConnectionString

解密：
aspnet_regiis -pdf connectionStrings E:\Project\Test\TestEncrptConnectionString\TestEncrptConnectionString

下面显示的是通过代码方式对数据库连接字符串加密，代码如下：

Configuration config = WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath); 
ConfigurationSection configSection = config.GetSection("connectionStrings"); 
if (configSection.SectionInformation.IsProtected) 
...{//如果已经加密，就不用再加密了 
configSection.SectionInformation.UnprotectSection(); 
config.Save(); 
} 
else { 
configSection.SectionInformation.ProtectSection ("DataProtectionConfigurationProvider"); 
config.Save(); 
}

正向：

  <appSettings>
          <add key="ConnectionString" value="server=localhost;database=test;pwd=sa;uid=sa;" />
      </appSettings>
我们使用简单的base64编码数据

byte[] data = System.Text.ASCIIEncoding.ASCII.GetBytes(this.textBox1.Text);
   string str  = Convert.ToBase64String(data);

<appSettings>
        <add key="ConnectionString"   value="c2VydmVyPWxvY2FsaG9zdDtkYXRhYmFzZT10ZXN0O3B3ZD1zYTt1aWQ9c2E7" />
    </appSettings>
反向:
   string strconn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
   byte[] data = Convert.FromBase64String(strconn);
   string strRealConn = System.Text.ASCIIEncoding.ASCII.GetString(data);