ServiceAuthorizationManager Class

Provides authorization access checking for service operations.

Namespace:  System.ServiceModel
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

public class ServiceAuthorizationManager

This class is responsible for evaluating all policies (rules that define what a user is allowed to do), comparing the policies to claims made by a client, setting the resulting AuthorizationContext to the ServiceSecurityContext, and providing the authorization decision whether to allow or deny access for a given service operation for a caller.

The CheckAccessCore method is called by the Windows Communication Foundation (WCF) infrastructure each time an attempt to access a resource is made. The method returns true or false to allow or deny access, respectively.

The ServiceAuthorizationManager is part of the WCFIdentity Model infrastructure. The Identity Model enables you to create custom authorization policies and custom authorization schemes. For more information about how the Identity Model works, see Claims and Authorization.

Custom Authorization

This class does not perform any authorization and allows users to access all service operations. To provide more restrictive authorization, you must create a custom authorization manager that checks custom policies. To do this, inherit from this class and override the CheckAccessCore method. Specify the instance of the derived class through the ServiceAuthorizationManager property.

In CheckAccessCore, the application can use the OperationContext object to access the caller identity (ServiceSecurityContext).

By getting the IncomingMessageHeaders property, which returns a MessageHeaders object, the application can access the service (To), and the operation (Action).

By getting the RequestContext property, which returns a RequestContext object, the application can access the entire request message (RequestMessage) and perform the authorization decision accordingly.

For an example, see How To: Create a Custom AuthorizationManager for a Service.

To create custom authorization policies, implement the IAuthorizationPolicy class. For an example, see How To: Create a Custom Authorization Policy.

To create a custom claim, use the Claim class. For an example, see How To: Create a Custom Claim. To compare custom claims, you must compare claims, as shown in How To: Compare Claims.

For more information, see Custom Authorization.

You can set the type of a custom authorization manager using the <serviceAuthorization> element in a client application configuration file.

The following example shows a class named MyServiceAuthorizationManager that inherits from the ServiceAuthorizationManager and overrides the CheckAccessCore method.

  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;
	  
	  // Iterate through the various claim sets 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://www.contoso.com/claims/allowedoperation".
            foreach (Claim c in cs.FindClaims("http://www.contoso.com/claims/allowedoperation", Rights.PossessProperty))
		  {
			// 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;                 
	}
  }

System.Object
  System.ServiceModel.ServiceAuthorizationManager

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0
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