ServiceSecurityContext 类

参考

定义

命名空间:: System.ServiceModel

程序集:: System.ServiceModel.dll

重要

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表示远程方的安全上下文。在客户端，表示服务标识；而在服务端，则表示客户端标识。

public ref class ServiceSecurityContext

public class ServiceSecurityContext

type ServiceSecurityContext = class

Public Class ServiceSecurityContext

继承: Object
ServiceSecurityContext

示例

下面的示例使用 ServiceSecurityContext 类提供有关当前安全上下文的信息。此代码创建一个 StreamWriter 类的实例，以将此信息写入文件。

// When this method runs, the caller must be an authenticated user
// and the ServiceSecurityContext is not a null instance.
public double Add(double n1, double n2)
{
    // Write data from the ServiceSecurityContext to a file using the StreamWriter class.
    using (StreamWriter sw = new StreamWriter(@"c:\ServiceSecurityContextInfo.txt"))
    {
        // Write the primary identity and Windows identity. The primary identity is derived from
        // the credentials used to authenticate the user. The Windows identity may be a null string.
        sw.WriteLine("PrimaryIdentity: {0}", ServiceSecurityContext.Current.PrimaryIdentity.Name);
        sw.WriteLine("WindowsIdentity: {0}", ServiceSecurityContext.Current.WindowsIdentity.Name);

        // Write the claimsets in the authorization context. By default, there is only one claimset
        // provided by the system.
        foreach (ClaimSet claimset in ServiceSecurityContext.Current.AuthorizationContext.ClaimSets)
        {
            foreach (Claim claim in claimset)
            {
                // Write out each claim type, claim value, and the right. There are two
                // possible values for the right: "identity" and "possessproperty".
                sw.WriteLine("Claim Type: {0}, Resource: {1} Right: {2}",
                    claim.ClaimType,
                    claim.Resource.ToString(),
                    claim.Right);
                sw.WriteLine();
            }
        }
    }
    return n1 + n2;
}

' When this method runs, the caller must be an authenticated user and the ServiceSecurityContext 
' is not a null instance. 
Public Function Add(ByVal n1 As Double, ByVal n2 As Double) As Double Implements ICalculator.Add
    ' Write data from the ServiceSecurityContext to a file using the StreamWriter class.
    Dim sw As New StreamWriter("c:\ServiceSecurityContextInfo.txt")
    Try
        ' Write the primary identity and Windows identity. The primary identity is derived from 
        ' the credentials used to authenticate the user. The Windows identity may be a null string.
        sw.WriteLine("PrimaryIdentity: {0}", ServiceSecurityContext.Current.PrimaryIdentity.Name)
        sw.WriteLine("WindowsIdentity: {0}", ServiceSecurityContext.Current.WindowsIdentity.Name)

        ' Write the claimsets in the authorization context. By default, there is only one claimset
        ' provided by the system. 
        Dim claimset As ClaimSet
        For Each claimset In ServiceSecurityContext.Current.AuthorizationContext.ClaimSets
            Dim claim As Claim
            For Each claim In claimset
                ' Write out each claim type, claim value, and the right. There are two
                ' possible values for the right: "identity" and "possessproperty". 
                sw.WriteLine("Claim Type: {0}, Resource: {1} Right: {2}", _
                claim.ClaimType, _
                claim.Resource.ToString(), _
                claim.Right)
                sw.WriteLine()
            Next claim
        Next claimset
    Finally
        sw.Dispose()
    End Try
    Return n1 + n2
End Function

下面的示例演示使用 CheckAccessCore 分析声明集的 ServiceSecurityContext 方法的实现。

public class MyServiceAuthorizationManager : ServiceAuthorizationManager
{
    protected override bool CheckAccessCore(OperationContext operationContext)
    {
        // Extract the action URI from the OperationContext. Match this against the claims
        // in the AuthorizationContext.
        string action = operationContext.RequestContext.RequestMessage.Headers.Action;
        Console.WriteLine("action: {0}", action);

        // Iterate through the various claimsets in the AuthorizationContext.
        foreach(ClaimSet cs in operationContext.ServiceSecurityContext.AuthorizationContext.ClaimSets)
        {
            // Examine only those claim sets issued by System.
            if (cs.Issuer == ClaimSet.System)
            {
                // Iterate through claims of type "http://example.org/claims/allowedoperation".
                foreach (Claim c in cs.FindClaims("http://example.org/claims/allowedoperation",
                    Rights.PossessProperty))
                {
                    // Write the Claim resource to the console.
                    Console.WriteLine("resource: {0}", c.Resource.ToString());

                    // If the Claim resource matches the action URI then return true to allow access.
                    if (action == c.Resource.ToString())
                        return true;
                }
            }
        }

        // If this point is reached, return false to deny access.
         return false;
    }
}

Public Class MyServiceAuthorizationManager
    Inherits ServiceAuthorizationManager
    
    Protected Overrides Function CheckAccessCore(ByVal operationContext As OperationContext) As Boolean 
        ' Extract the action URI from the OperationContext. Match this against the claims
        ' in the AuthorizationContext.
        Dim action As String = operationContext.RequestContext.RequestMessage.Headers.Action
        Console.WriteLine("action: {0}", action)
        
        ' Iterate through the various claimsets in the authorizationcontext.
        Dim cs As ClaimSet
        For Each cs In  operationContext.ServiceSecurityContext.AuthorizationContext.ClaimSets
            ' Examine only those claim sets issued by System.
            If cs.Issuer Is ClaimSet.System Then
                ' Iterate through claims of type "http://example.org/claims/allowedoperation".
                Dim c As Claim
                For Each c In  cs.FindClaims("http://example.org/claims/allowedoperation", _
                        Rights.PossessProperty)
                    ' Write the Claim resource to the console.
                    Console.WriteLine("resource: {0}", c.Resource.ToString())
                    
                    ' If the Claim resource matches the action URI then return true to allow access.
                    If action = c.Resource.ToString() Then
                        Return True
                    End If
                Next c
            End If
        Next cs 
        ' If we get here, return false, denying access.
        Return False
    
    End Function 
End Class

注解

此数据是消息的 SecurityMessageProperty 的一部分。

使用此类在运行时获取有关远程 安全上下文 的信息。当客户端成功通过身份验证并获得访问某个方法的授权时，将会创建安全上下文。当某个消息成功通过身份验证并获得授权时，即可从此类的实例中获取客户端和当前服务实例的安全信息。

您可以从 ServiceSecurityContext 类的 Current 属性检索 OperationContext 的实例，或者在服务操作方法中使用该实例，如下面的示例所示。

分析 ClaimSet

该类通常用于检索当前声明集，以便在访问方法时对客户端进行标识和授权。 ClaimSet 类包含 Claim 对象的集合，您可以分析每个对象以确定是否存在特定的声明。如果提供的是指定的声明，即可获得授权。此功能通过重写 CheckAccessCore 类的 ServiceAuthorizationManager 方法提供。有关完整示例，请参阅授权策略。

请注意，在某些情况下，即使远程客户端经身份验证为匿名用户，IsAuthenticated 接口的 IIdentity 属性仍将返回 true。 (该 PrimaryIdentity 属性返回 IIdentity interface.) 以下情况必须如此，才能发生这种情况：

服务使用的是 Windows 身份验证。
服务允许匿名登录。
绑定是 <customBinding>。
自定义绑定包括 <security> 元素。
该 <security> 元素包含一个 <secureConversationBootstrap> ，其 requireSecurityContextCancellation 属性设置为 false.

构造函数

ServiceSecurityContext(AuthorizationContext)	使用指定的授权参数初始化 ServiceSecurityContext 类的新实例。
ServiceSecurityContext(AuthorizationContext, ReadOnlyCollection<IAuthorizationPolicy>)	使用指定的授权参数和策略集合初始化 ServiceSecurityContext 类的新实例。
ServiceSecurityContext(ReadOnlyCollection<IAuthorizationPolicy>)	使用策略对象集合初始化 ServiceSecurityContext 类的新实例。

属性

Anonymous	返回一个 ServiceSecurityContext 类的实例，该实例包含空的声明集合、标识和通常用于表示匿名方的其他上下文数据。
AuthorizationContext	获取此类的实例的授权信息。 AuthorizationContext 包含一个可供应用程序询问和检索远程方信息的 ClaimSet 集合。
AuthorizationPolicies	获取与此类的实例关联的策略集合。
Current	获取当前 ServiceSecurityContext。
IsAnonymous	获取一个值，该值指示当前客户端是否已向服务提供凭据。
PrimaryIdentity	获取与当前设置关联的主标识。
WindowsIdentity	获取当前设置的 Windows 标识。

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ToString()	返回表示当前对象的字符串。 (继承自 Object)

适用于

通过

ServiceSecurityContext 类

定义

示例

注解

分析 ClaimSet

构造函数

属性

方法

适用于

另请参阅

其他资源

通过

ServiceSecurityContext 类

定义

示例

注解

分析 ClaimSet

Cookie 模式和 IsAuthenticated

构造函数

属性

方法

适用于

另请参阅

其他资源