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namespace System.ServiceModel.Activities.Description
{
using System.Collections.ObjectModel;
using System.Linq;
using System.Runtime;
using System.Security.Principal;
using System.ServiceModel.Activation;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.ServiceModel.Activities.Dispatcher;
using System.Xml;
using System.ServiceModel.Security;
using System.Net.Security;
[Fx.Tag.XamlVisible(false)]
public sealed class WorkflowInstanceManagementBehavior : IServiceBehavior
{
public const string ControlEndpointAddress = "System.ServiceModel.Activities_IWorkflowInstanceManagement";
static Binding httpBinding;
static Binding namedPipeBinding;
string windowsGroup;
public WorkflowInstanceManagementBehavior()
{
this.windowsGroup = GetDefaultBuiltinAdministratorsGroup();
}
public string WindowsGroup
{
get
{
return this.windowsGroup;
}
set
{
if (string.IsNullOrEmpty(value))
{
throw FxTrace.Exception.ArgumentNullOrEmpty("WindowsGroup");
}
this.windowsGroup = value;
}
}
public static Binding HttpControlEndpointBinding
{
get
{
if (httpBinding == null)
{
httpBinding = new WSHttpBinding
{
TransactionFlow = true,
Security = new WSHttpSecurity
{
Mode = SecurityMode.Message,
Message = new NonDualMessageSecurityOverHttp
{
ClientCredentialType = MessageCredentialType.Windows
}
}
};
}
return httpBinding;
}
}
public static Binding NamedPipeControlEndpointBinding
{
get
{
if (namedPipeBinding == null)
{
namedPipeBinding = new NetNamedPipeBinding
{
TransactionFlow = true,
Security = new NetNamedPipeSecurity
{
Mode = NetNamedPipeSecurityMode.Transport,
Transport = new NamedPipeTransportSecurity
{
ProtectionLevel = ProtectionLevel.Sign
}
}
};
}
return namedPipeBinding;
}
}
public void AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
{
}
public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
if (serviceHostBase == null)
{
throw FxTrace.Exception.ArgumentNull("serviceHostBase");
}
WorkflowServiceHost workflowServiceHost = serviceHostBase as WorkflowServiceHost;
if (workflowServiceHost != null)
{
CreateWorkflowManagementEndpoint(workflowServiceHost);
}
}
public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
}
internal static string GetDefaultBuiltinAdministratorsGroup()
{
SecurityIdentifier identifier = new SecurityIdentifier(WellKnownSidType.BuiltinAdministratorsSid, null);
NTAccount account = (NTAccount)identifier.Translate(typeof(NTAccount));
return account.Value;
}
void CreateWorkflowManagementEndpoint(WorkflowServiceHost workflowServiceHost)
{
Binding controlEndpointBinding;
if (workflowServiceHost.InternalBaseAddresses.Contains(Uri.UriSchemeNetPipe))
{
controlEndpointBinding = NamedPipeControlEndpointBinding;
}
else if (workflowServiceHost.InternalBaseAddresses.Contains(Uri.UriSchemeHttp))
{
controlEndpointBinding = HttpControlEndpointBinding;
}
else
{
return;
}
Uri controlEndpointAddress = ServiceHost.GetVia(controlEndpointBinding.Scheme, new Uri(ControlEndpointAddress, UriKind.Relative), workflowServiceHost.InternalBaseAddresses);
XmlQualifiedName contractName = new XmlQualifiedName(XD2.WorkflowInstanceManagementService.ContractName, XD2.WorkflowServices.Namespace);
//Create the Endpoint Dispatcher
EndpointAddress address = new EndpointAddress(controlEndpointAddress.AbsoluteUri);
EndpointDispatcher endpointDispatcher = new EndpointDispatcher(address,
XD2.WorkflowInstanceManagementService.ContractName,
XD2.WorkflowServices.Namespace, true)
{
ContractFilter = new ActionMessageFilter(
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.Abandon, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.Cancel, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.Run, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.Suspend, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.Terminate, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.TransactedCancel, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.TransactedRun, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.TransactedSuspend, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.TransactedTerminate, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.TransactedUnsuspend, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.TransactedUpdate, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.Unsuspend, null, false),
NamingHelper.GetMessageAction(contractName, XD2.WorkflowInstanceManagementService.Update, null, false)),
};
//Create Listener
ServiceEndpoint endpoint = new ServiceEndpoint(WorkflowControlEndpoint.WorkflowControlServiceContract, controlEndpointBinding, address);
BindingParameterCollection parameters = workflowServiceHost.GetBindingParameters(endpoint);
IChannelListener listener;
if (controlEndpointBinding.CanBuildChannelListener<IDuplexSessionChannel>(controlEndpointAddress, parameters))
{
listener = controlEndpointBinding.BuildChannelListener<IDuplexSessionChannel>(controlEndpointAddress, parameters);
}
else if (controlEndpointBinding.CanBuildChannelListener<IReplySessionChannel>(controlEndpointAddress, parameters))
{
listener = controlEndpointBinding.BuildChannelListener<IReplySessionChannel>(controlEndpointAddress, parameters);
}
else
{
listener = controlEndpointBinding.BuildChannelListener<IReplyChannel>(controlEndpointAddress, parameters);
}
//Add the operations
bool formatRequest;
bool formatReply;
foreach (OperationDescription operation in WorkflowControlEndpoint.WorkflowControlServiceContract.Operations)
{
DataContractSerializerOperationBehavior dataContractSerializerOperationBehavior = new DataContractSerializerOperationBehavior(operation);
DispatchOperation operationDispatcher = new DispatchOperation(endpointDispatcher.DispatchRuntime, operation.Name,
NamingHelper.GetMessageAction(operation, false), NamingHelper.GetMessageAction(operation, true))
{
Formatter = (IDispatchMessageFormatter)dataContractSerializerOperationBehavior.GetFormatter(operation, out formatRequest, out formatReply, false),
Invoker = new ControlOperationInvoker(
operation,
new WorkflowControlEndpoint(controlEndpointBinding, address),
null,
workflowServiceHost),
};
endpointDispatcher.DispatchRuntime.Operations.Add(operationDispatcher);
OperationBehaviorAttribute operationAttribute = operation.Behaviors.Find<OperationBehaviorAttribute>();
((IOperationBehavior)operationAttribute).ApplyDispatchBehavior(operation, operationDispatcher);
}
DispatchRuntime dispatchRuntime = endpointDispatcher.DispatchRuntime;
dispatchRuntime.ConcurrencyMode = ConcurrencyMode.Multiple;
dispatchRuntime.InstanceContextProvider = new DurableInstanceContextProvider(workflowServiceHost);
dispatchRuntime.InstanceProvider = new DurableInstanceProvider(workflowServiceHost);
dispatchRuntime.ServiceAuthorizationManager = new WindowsAuthorizationManager(this.WindowsGroup);
//Create the Channel Dispatcher
ServiceDebugBehavior serviceDebugBehavior = workflowServiceHost.Description.Behaviors.Find<ServiceDebugBehavior>();
ServiceBehaviorAttribute serviceBehaviorAttribute = workflowServiceHost.Description.Behaviors.Find<ServiceBehaviorAttribute>();
bool includeDebugInfo = false;
if (serviceDebugBehavior != null)
{
includeDebugInfo |= serviceDebugBehavior.IncludeExceptionDetailInFaults;
}
if (serviceBehaviorAttribute != null)
{
includeDebugInfo |= serviceBehaviorAttribute.IncludeExceptionDetailInFaults;
}
ChannelDispatcher channelDispatcher = new ChannelDispatcher(listener, controlEndpointBinding.Name, controlEndpointBinding)
{
MessageVersion = controlEndpointBinding.MessageVersion,
Endpoints = { endpointDispatcher },
ServiceThrottle = workflowServiceHost.ServiceThrottle
};
workflowServiceHost.ChannelDispatchers.Add(channelDispatcher);
}
sealed class WindowsAuthorizationManager : ServiceAuthorizationManager
{
SecurityIdentifier sid;
public WindowsAuthorizationManager(string windowsGroup)
{
NTAccount identity = new NTAccount(windowsGroup);
try
{
this.sid = identity.Translate(typeof(SecurityIdentifier)) as SecurityIdentifier;
}
catch (IdentityNotMappedException)
{
throw FxTrace.Exception.Argument(windowsGroup, SR.WindowsGroupNotFound(windowsGroup));
}
}
protected override bool CheckAccessCore(OperationContext operationContext)
{
WindowsPrincipal principal = new WindowsPrincipal(operationContext.ServiceSecurityContext.WindowsIdentity);
bool isAuthorized = false;
if (!operationContext.ServiceSecurityContext.IsAnonymous)
{
isAuthorized = principal.IsInRole(sid);
}
return isAuthorized;
}
}
}
}
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