无法在 .net 4.5 中加密配置文件，但能够在 .net 3.5 中执行相同操作

Question

我有一个 winform 应用程序，我想在配置 file.Hence 中存储一些值，我创建了一个 app.config file.Below 是它的内容。

  <configProtectedData>
    <providers>
      <add name="DataProtectionConfigurationProvider" type="System.Configuration.DpapiProtectedConfigurationProvider,System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" description="Uses CryptProtectData and CryptUnProtectData Windows APIs to encrypt and decrypt" useMachineProtection="true" keyEntropy="" />      
    </providers>
  </configProtectedData>

  <appSettings>

  </appSettings>
  <system.web>
    <membership defaultProvider="ClientAuthenticationMembershipProvider">
      <providers>
        <add name="ClientAuthenticationMembershipProvider" type="System.Web.ClientServices.Providers.ClientFormsAuthenticationMembershipProvider, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" serviceUri="" />
      </providers>
    </membership>
    <roleManager defaultProvider="ClientRoleProvider" enabled="true">
      <providers>
        <add name="ClientRoleProvider" type="System.Web.ClientServices.Providers.ClientRoleProvider, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" serviceUri="" cacheTimeout="86400" />
      </providers>
    </roleManager>
  </system.web>
</configuration>

我也想加密数据，所以用下面的代码加密：

 Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
                    ConfigurationSection section = config.GetSection(sectionName);

                    if (!section.SectionInformation.IsProtected)
                    {

                        section.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");
                    }
                    section.SectionInformation.ForceSave = true;

                    config.Save(ConfigurationSaveMode.Modified);

这在我编译和运行在 VS 中使用 .net 3.5 的代码时工作正常 2008.But 当我在 VS 2012 中使用 .net 4.5 编译代码时，它给我以下错误section.SectionInformation.ProtectSection("DataProtectionConfigurationProvider") line.Also，将值添加到配置文件后，当我尝试保存文件时，它给了我同样的错误。

The entry 'DataProtectionConfigurationProvider' has already been added.

这是什么原因？

Answer 1

该提供程序在 machine.config 4.0 框架中定义...

<configProtectedData defaultProvider="RsaProtectedConfigurationProvider">
    <providers>
        <add name="RsaProtectedConfigurationProvider" type="System.Configuration.RsaProtectedConfigurationProvider,System.Configuration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" description="Uses RsaCryptoServiceProvider to encrypt and decrypt" keyContainerName="NetFrameworkConfigurationKey" cspProviderName="" useMachineContainer="true" useOAEP="false"/>
        <add name="DataProtectionConfigurationProvider" type="System.Configuration.DpapiProtectedConfigurationProvider,System.Configuration, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" description="Uses CryptProtectData and CryptUnProtectData Windows APIs to encrypt and decrypt" useMachineProtection="true" keyEntropy=""/>
    </providers>
</configProtectedData>

app.config.

中无需再次添加

无法在 .net 4.5 中加密配置文件，但能够在 .net 3.5 中执行相同操作

Not able to encrypt Configuration file in .net 4.5 but able to do the same in .net 3.5

c#

encryption

configuration

configurationmanager

.net-4.5