Trying to convert WIF 4.0 custom STS (from project template) to use .NET 4.5 - wif

Question

I have successfully created a working custom STS using the project templates for the passive and active cases that came with the most recent WIF SDK (for .NET 4.0). Everything works as desired.
I am now trying to upgrade my web applications and services to .NET 4.5, including my custom STS. I have been able to map all of the namespaces/classes from Microsoft.IdentityModel.xxx to the new namespaces/classes built into the framework with 1 exception - WSTrustServiceHostFactory.
That class no longer seems to exist, and I cannot figure out how to replace the functionality it provided. Namely, from this link:
http://msdn.microsoft.com/en-us/library/microsoft.identitymodel.protocols.wstrust.wstrustservicehostfactory
<%#ServiceHostLanguage="C#"Debug="true"Service="XXX.XXX.MyActiveSTSConfiguration"Factory="Microsoft.IdentityModel.Protocols.WSTrust.WSTrustServiceHostFactory"%>
My passive STS is currently working after upgrading to 4.5. I need to find an appropriate/recommended method of instantiating an active SecurityTokenService using the 4.5 framework (ideally, using web.config for most configuration as in the SDK project templates). Any suggestions are appreciated.

Answer 1

This turned out to be pretty simple once I figured a few things out.
Service host markup:
<%# ServiceHost Language="C#" Debug="true" Service="XXX.XXX.MyActiveSTSConfiguration" Factory="XXX.XXX.CustomWSTrustServiceHostFactory" %>
Here's my custom factory class implementation. The key is that since you can no longer use WSTrustServiceFactory to create a WSTrustServiceHost for you, you have to explicitly create one yourself in the CreateServiceHost method overrides.
public class CustomWSTrustServiceHostFactory
: ServiceHostFactory {
/// <summary>
/// Initializes a new instance of the <see cref="CustomWSTrustServiceHostFactory"/> class.
/// </summary>
public CustomWSTrustServiceHostFactory()
: base() { }
/// <summary>
/// Creates and configures a <see cref="WSTrustServiceHost"/> with a specific base address.
/// </summary>
/// <param name="serviceType">Specifies the type of service to host (ignored).</param>
/// <param name="baseAddresses">The <see cref="T:Uri"/> array that contains the base addresses for the service.</param>
/// <returns>A <see cref="WSTrustServiceHost"/> with a specific base address.</returns>
protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses) {
var config = new PortalActiveSTSConfiguration();
var host = new WSTrustServiceHost(config, baseAddresses);
//var host = base.CreateServiceHost(serviceType, baseAddresses);
var serviceBehavior = host.Description.Behaviors.Find<ServiceBehaviorAttribute>();
serviceBehavior.AddressFilterMode = AddressFilterMode.Any;
return host;
}
/// <summary>
/// Creates and configures a <see cref="WSTrustServiceHost"/> with a specific base address.
/// </summary>
/// <param name="constructorString">The constructor string (ignored).</param>
/// <param name="baseAddresses">The <see cref="T:Uri"/> array that contains the base addresses for the service.</param>
/// <returns></returns>
public override ServiceHostBase CreateServiceHost(string constructorString, Uri[] baseAddresses) {
var config = new PortalActiveSTSConfiguration();
var host = new WSTrustServiceHost(config, baseAddresses);
//var host = base.CreateServiceHost(constructorString, baseAddresses);
var serviceBehavior = host.Description.Behaviors.Find<ServiceBehaviorAttribute>();
serviceBehavior.AddressFilterMode = AddressFilterMode.Any;
return host;
}
}
Custom service configuration class implementation (basically what came with the WIF 4.0 STS template):
public class MyActiveSTSConfiguration
: SecurityTokenServiceConfiguration {
public MyActiveSTSConfiguration()
: base(
WebConfigurationManager.AppSettings[ISSUER_NAME],
new X509SigningCredentials(
CertificateUtil.GetCertificate(
StoreName.My, StoreLocation.LocalMachine, X509FindType.FindByThumbprint,
WebConfigurationManager.AppSettings[SIGNING_CERTIFICATE_THUMBPRINT],
true)
)
) {
this.SecurityTokenService = typeof(MyActiveSTS);
}
}