[WCF权限控制]ASP.NET Roles授权[下篇]

为了让读者对基于ASP.ENT Roles授权方式有一个全面的认识,我们现在来做一个实例演示。在这个实例中,我们将采用不同的认证方式,包括Windows认证和证书认证(ASP.NET Membership + Roles为常见的组合方式,在这里就不多作演示)。简单起见,我们依然沿用一贯的基于如下图所示的解决方案结构,并且依然采用声明式的授权。所以在服务操作方法Add上通过应用PrincipalPermissionAttribute特性指定其被授权的角色Administrators。

image

   1: public class CalculatorService : ICalculator
   2: {
   3:     [PrincipalPermission(SecurityAction.Demand, Role = "Administrators")]
   4:     public double Add(double x, double y)
   5:     {
   6:         return x + y;
   7:     }
   8: }

一、为SqlRoleProvider创建数据库

我们具体采用的RoleProvider为SqlRoleProvider。为此,我们首先需要做的就是创建相应的数据库。ASP.NET所有提供程序(比如Membership、Roles、Profile和Site Map等)所用的数据库的初始化工作都可以通过aspnet_regsql.exe这个工具来生成。当你创建了数据库之后,你需要在aspnet_Applications表中插入一条记录,以表示我们我们即将演示的应用。你可以直接执行如下的一段SQL脚本,在该校本中我们将演示应用起名为AspRolesAuthorizationDemo

   1: INSERT INTO [aspnet_Applications]
   2:            ([ApplicationName]
   3:            ,[LoweredApplicationName]
   4:            ,[ApplicationId]
   5:            ,[Description])
   6: VALUES
   7:            (
   8:              'AspRolesAuthorizationDemo'
   9:              ,'asprolesauthorizationdemo '
  10:              ,NEWID()
  11:              ,''
  12:         )

二、在Windows认证下使用ASP.ENT Roles授权

我们授权演示的是在客户端凭证类型为Windows的情况下采用ASP.NET Roles授权模式,为此我们需要更新一下服务端和客户端的配置。注意不要忘了将根据你的实际情况修正连接字符串。下面是服务端配置。

   1: <?xml version="1.0"?>
   2: <configuration>
   3:   <connectionStrings>
   4:     <add name="aspNetDb" connectionString="..." providerName="System.Data.SqlClient"/>
   5:   </connectionStrings>
   6:   <system.web>    
   7:     <roleManager enabled="true" defaultProvider="sqlRoleProvider">
   8:       <providers>
   9:         <add name="sqlRoleProvider" 
  10: type="System.Web.Security.SqlRoleProvider, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" 
  11: connectionStringName="AspNetDb" applicationName="AspRolesAuthorizationDemo"/>
  12:       </providers>
  13:     </roleManager>
  14:   </system.web>
  15:   <system.serviceModel>  
  16:     <services>
  17:       <service name="Artech.WcfServices.Services.CalculatorService" behaviorConfiguration="useAspNetRoles">
  18:         <endpoint address="http://127.0.0.1/calculatorservice" binding="ws2007HttpBinding" 
  19: contract="Artech.WcfServices.Contracts.ICalculator"/>
  20:       </service>
  21:     </services>
  22:     <behaviors>
  23:       <serviceBehaviors>
  24:         <behavior  name="useAspNetRoles">          
  25:           <serviceAuthorization principalPermissionMode="UseAspNetRoles" roleProviderName="sqlRoleProvider"/>
  26:         </behavior>
  27:       </serviceBehaviors>
  28:     </behaviors>
  29:   </system.serviceModel>
  30: </configuration>

下面是客户端配置。

   1: <?xml version="1.0"?>
   2: <configuration>
   3:   <system.serviceModel>   
   4:     <client>
   5:       <endpoint name="calculatorService" address="http://127.0.0.1/calculatorservice" binding="ws2007HttpBinding" 
   6: contract="Artech.WcfServices.Contracts.ICalculator"/>
   7:     </client>   
   8:   </system.serviceModel>
   9: </configuration>

在这之前我们需要创建了两个Windows帐号Foo和Bar,密码为Password。由于我们现在是采用ASP.NET Roles进行授权,我们需要通过Roles这个静态类为他们分配相应的权限。为了省事,我直接将相应的实现写在如下所示的服务寄宿程序中。在这段代码中,如果Administrators角色不存在,先创建它,并将其分配给用户Jinnan-PC\Foo(Jinnan-PC为我的机器名,对于域帐号,用域名替换)。

   1: if (!Roles.RoleExists("Administrators"))
   2: {
   3:     Roles.CreateRole("Administrators");
   4: }
   5: if(!Roles.IsUserInRole(@"Jinnan-PC\Foo","Administrators"))
   6: {
   7:     Roles.AddUserToRole(@"Jinnan-PC\Foo","Administrators");
   8: }
   9: using (ServiceHost host = new ServiceHost(typeof(CalculatorService)))
  10: {
  11:     host.Open();
  12:     Console.Read();
  13: }

然后客户端分别以Foo和Bar的名义进行两次服务调用,下面是客户端程序:

   1: ChannelFactory<ICalculator> channelFactory = new ChannelFactory<ICalculator>("calculatorService");
   2: NetworkCredential credential = channelFactory.Credentials.Windows.ClientCredential;
   3: credential.UserName = "Foo";
   4: credential.Password = "Password";
   5: ICalculator calculator = channelFactory.CreateChannel();
   6: Invoke(calculator);
   7:  
   8: channelFactory = new ChannelFactory<ICalculator>("calculatorService");
   9: credential = channelFactory.Credentials.Windows.ClientCredential;
  10: credential.UserName = "Bar";
  11: credential.Password = "Password";
  12: calculator = channelFactory.CreateChannel();
  13: Invoke(calculator);

其中Invoke方法定义如下:

   1: static void Invoke(ICalculator calculator)
   2: {
   3:     try
   4:     {
   5:         calculator.Add(1,2);
   6:         Console.WriteLine("服务调用成功...");
   7:     }
   8:     catch (Exception ex)
   9:     {
  10:         Console.WriteLine("服务调用失败...");
  11:     }
  12: }

由于Foo在服务启动之初就已经分配了Adminstrators角色,而Bar没有,所以只有第一次服务调用能够成功。而最终的执行结果也印证了这一点。

   1: 服务调用成功...
   2: 服务调用失败...

三、在X.509证书认证下使用ASP.ENT Roles授权

接下来我们来演示客户端使用X.509证书的情况下如何使用ASP.ENT Roles授权。为此我们需要通过如下的命令行创建三个主题名称(CN)分别为Jinnan-PC(你可以任意指定该证书主体名称)、Foo和Bar的证书。第一个作为服务证书,后两个坐位客户端证书。它们都自动保存到本机(LocalMachine)的个人证书存储区。然后我们利用MMC的证书管理单元将Foo和Bar两证书导入到受信任人(Trusted People)证书存储区。

   1: MakeCert –n “CN=Jinnan-PC” –sr LocalMachine –ss My –pe –sky exchange
   2: MakeCert –n “CN=Foo” –sr LocalMachine –ss My –pe –sky exchange
   3: MakeCert –n “CN=Bar” –sr LocalMachine –ss My –pe –sky exchange

为了采用X.509证书作为客户端凭证,我们需要修改服务端和客户端的配置。在服务端配置中,不仅仅通过服务行为进行基于ASP.NET Roles授权相应的设置,还为服务设置了服务证书(Jinnan-PC),以及针对证书的认证模式(PeerOrChainTrust)。而客户端则将服务证书的认证模式设为None。下面是服务端配置。

   1: <?xml version="1.0"?>
   2: <configuration>
   3:   <connectionStrings>
   4:     <add name="AspNetDb" connectionString="..." providerName="System.Data.SqlClient"/>
   5:   </connectionStrings>
   6:   <system.web>    
   7:     <roleManager enabled="true" defaultProvider="SqlRoleProvider">
   8:       <providers>
   9:         <add name="sqlRoleProvider" 
  10: type="System.Web.Security.SqlRoleProvider, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" 
  11: connectionStringName="AspNetDb" applicationName="AspRolesAuthorizationDemo"/>
  12:       </providers>
  13:     </roleManager>
  14:     </system.web>
  15:   <system.serviceModel>
  16:     <bindings>
  17:       <ws2007HttpBinding>
  18:         <binding name="certificateCredentialBinding">
  19:           <security mode="Message">
  20:             <message clientCredentialType="Certificate"/>
  21:           </security>
  22:         </binding>
  23:       </ws2007HttpBinding>
  24:     </bindings>
  25:     <services>
  26:       <service name="Artech.WcfServices.Services.CalculatorService" behaviorConfiguration="useAspNetRoles">
  27:         <endpoint address="http://127.0.0.1/calculatorservice" binding="ws2007HttpBinding" bindingConfiguration="certificateCredentialBinding" 
  28: contract="Artech.WcfServices.Contracts.ICalculator"/>
  29:       </service>
  30:     </services>
  31:     <behaviors>
  32:       <serviceBehaviors>
  33:         <behavior  name="useAspNetRoles">
  34:           <serviceAuthorization principalPermissionMode="UseAspNetRoles" roleProviderName="sqlRoleProvider"/>
  35:           <serviceCredentials>
  36:             <serviceCertificate storeLocation="LocalMachine" storeName ="My" x509FindType="FindBySubjectName" findValue="Jinnan-PC"/>
  37:             <clientCertificate>
  38:               <authentication certificateValidationMode="PeerOrChainTrust"/>
  39:             </clientCertificate>
  40:           </serviceCredentials>
  41:         </behavior>
  42:       </serviceBehaviors>
  43:     </behaviors>
  44:   </system.serviceModel>
  45: </configuration>

下面是客户端配置。

   1: <?xml version="1.0"?>
   2: <configuration>
   3:   <system.serviceModel>
   4:     <bindings>
   5:       <ws2007HttpBinding>
   6:         <binding name="certificateCredentialBinding">
   7:           <security mode="Message">
   8:             <message clientCredentialType="Certificate"/>
   9:           </security>
  10:         </binding>
  11:       </ws2007HttpBinding>
  12:     </bindings>
  13:     <client>
  14:       <endpoint name="calculatorService" behaviorConfiguration="ignoreCertValidation" 
  15: address="http://127.0.0.1/calculatorservice" binding="ws2007HttpBinding" bindingConfiguration="certificateCredentialBinding" 
  16: contract="Artech.WcfServices.Contracts.ICalculator">
  17:         <identity>
  18:           <certificateReference storeLocation="LocalMachine" storeName ="My" x509FindType="FindBySubjectName" findValue="Jinnan-PC"/>
  19:         </identity>
  20:       </endpoint>
  21:     </client>
  22:     <behaviors>
  23:       <endpointBehaviors>
  24:         <behavior name="ignoreCertValidation">
  25:           <clientCredentials>
  26:             <serviceCertificate>
  27:               <authentication certificateValidationMode="None"/>
  28:             </serviceCertificate>
  29:           </clientCredentials>
  30:         </behavior>
  31:       </endpointBehaviors>
  32:     </behaviors>
  33:   </system.serviceModel>
  34: </configuration>

现在我需要做的是通过Roles这个静态类型对以证书表示的两个用户进行角色的分配。之前我们已经说过,当客户端采用证书作为客户端凭证的情况下,用户名称得格式为(<<主题名称>>; <<指纹>>)。Foo的主题名称为CN=Foo,你可以通过MMC的证书管理单元查看证书的指纹,比如指纹内容为50819320DAAF1BAD9DE8823D3216BE9B36760C4D。那么我们只需要针对用户名“CN=Foo; 50819320DAAF1BAD9DE8823D3216BE9B36760C4D”进行授权就可以了。我们一样将角色分配实现在服务寄宿程序中。

   1: if (!Roles.RoleExists("Administrators"))
   2: {
   3:     Roles.CreateRole("Administrators");
   4: }
   5: if (!Roles.IsUserInRole("CN=Foo; 50819320DAAF1BAD9DE8823D3216BE9B36760C4D", "Administrators"))
   6: {
   7:     Roles.AddUserToRole("CN=Foo; 50819320DAAF1BAD9DE8823D3216BE9B36760C4D", "Administrators");
   8: }
   9: using (ServiceHost host = new ServiceHost(typeof(CalculatorService)))
  10: {
  11:     host.Open();
  12:     Console.Read();
  13: }

然后客户端分别使用针对Foo和Bar两张不同证书作为凭证进行服务调用,相应的客户端程序如下所示。根据权限的不同,也只有第一次服务调用能够成功。

客户端程序:

   1: ChannelFactory<ICalculator> channelFactory = new ChannelFactory<ICalculator>("calculatorService");
   2: channelFactory.Credentials.ClientCertificate.SetCertificate( StoreLocation.LocalMachine, StoreName.My, X509FindType.FindBySubjectName,"Foo");
   3: ICalculator calculator = channelFactory.CreateChannel();
   4: Invoke(calculator);
   5:  
   6: channelFactory = new ChannelFactory<ICalculator>("calculatorService");
   7: channelFactory.Credentials.ClientCertificate.SetCertificate(StoreLocation.LocalMachine, StoreName.My, X509FindType.FindBySubjectName, "Bar");   
   8: calculator = channelFactory.CreateChannel();
   9: Invoke(calculator);

输出结果:

   1: 服务调用成功...
   2: 服务调用失败...

 

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posted @ 2011-07-04 19:43  Artech  阅读(5127)  评论(11编辑  收藏  举报