asp.net - 如何加密 web.config 中的一项

Question

ASP.NET 4

我在我的网络场的 web.config 中使用了 RSA key encryption 作为连接字符串。不过，我还想加密一个自定义密码条目。我应该如何使用 RSA key 对其进行加密，而不加密其余配置。请指教，谢谢。

示例:

  <appSettings>
        ...
    <add key="Host" value="www.foo.com" />
    <add key="Token" value="qwerqwre" />
    <add key="AccountId" value="123" />
    <add key="DepartmentId" value="456" />
    <add key="Password" value="asdfasdf" />
    <add key="SessionEmail" value="foo@foo.com" />
    <add key="DefaultFolder" value="789" />
  </appSettings>

Answer 1

您可以将密码放入单独的部分并仅加密该部分。例如:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="secureAppSettings" type="System.Configuration.NameValueSectionHandler, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
    </configSections>

    <appSettings>
        <add key="Host" value="www.foo.com" />
        <add key="Token" value="qwerqwre" />
        <add key="AccountId" value="123" />
        <add key="DepartmentId" value="456" />
        <add key="SessionEmail" value="foo@foo.com" />
        <add key="DefaultFolder" value="789" />  
    </appSettings>

    <secureAppSettings>
        <add key="Password" value="asdfasdf" />
    </secureAppSettings>  
</configuration>

然后(请注意，我在示例中使用 DPAPI，因此请调整 RSA 的提供程序):

aspnet_regiis -pef secureAppSettings . -prov DataProtectionConfigurationProvider

加密后，文件将如下所示:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="secureAppSettings" type="System.Configuration.NameValueSectionHandler, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
    </configSections>

    <appSettings>
        <add key="Host" value="www.foo.com" />
        <add key="Token" value="qwerqwre" />
        <add key="AccountId" value="123" />
        <add key="DepartmentId" value="456" />
        <add key="SessionEmail" value="foo@foo.com" />
        <add key="DefaultFolder" value="789" />  
    </appSettings>

    <secureAppSettings configProtectionProvider="DataProtectionConfigurationProvider">
        <EncryptedData>
            <CipherData>
                <CipherValue>AQAAANCMnd.......</CipherValue>
            </CipherData>
        </EncryptedData>
    </secureAppSettings>  
</configuration>

文件加密后，您在应用程序中访问这些设置的方式仍然相同且完全透明:

var host = ConfigurationManager.AppSettings["Host"];
var password = ConfigurationManager.AppSettings["Password"];