Skip to main content

CoreService and ADFS with Issued Token

If in an earlier post CoreService with ADFS, I was talking about XML configuration of the .NET client application when connecting to a SDL Web 8.5 instance secured with ADFS, in this post I am showing another way of connecting to the CoreService, namely using a SAML token requested through code rather than configuration.

The main steps in this approach are:
  • client .NET Console application requests programmatically a SAML token from the ADFS server
  • client creates connection using issued token
The setup on the SDL Web server and the configurations of the CoreService web-service are identical to those presented in the earlier post, therefore I won't mention them again here.

App.Config

The client is a .NET Console application using an App.config which defines the following CoreService endpoint:

<system.serviceModel>
  <bindings>
    <ws2007FederationHttpBinding>
      <binding name="myCoreServiceBinding" maxReceivedMessageSize="10485760">
        <security mode="TransportWithMessageCredential">
          <message issuedTokenType="http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV2.0">
            <issuer address="http://some.url" binding="basicHttpBinding" />
          </message>
        </security>
      </binding>
    </ws2007FederationHttpBinding>
  </bindings>

  <client>
    <endpoint address="https://web85.playground/webservices/CoreService201603.svc/wsFederationHttp"
      binding="ws2007FederationHttpBinding" bindingConfiguration="myCoreServiceBinding"
      contract="MyCoreService.ISessionAwareCoreService" name="coreServiceFederation">
      <identity>
        <dns value="web85.playground"/>
      </identity>
    </endpoint>
  </client>
</system.serviceModel>

Note that the security is setup as TransportWithMessageCredential, which means HTTPS containing some message that contains the user credential. Furthermore, the format of the message is defined as SAML v2. The issuer of the SAML token is set to a fictitious address, but it has to be specified, otherwise we get System.IdentityModel.Selectors.CardSpaceException.

The client uses generated CoreService proxy classes and this helps also in creating the client endpoint above.

Client Code

The client makes 2 separate calls when creating a channel with the CoreService:
  • get SAML token from ADFS server
  • open connection to CoreService using issued token
The method GetToken() calls the Security Toke Service (STS) endpoint on the ADFS server, i.e. https://myadfs.com/adfs/services/trust/2005/usernamemixed, passes in the username, password and Relying Party identifier, and requests a SAML2 token. If username / password are correct, then ADFS issues an encrypted SAML token.

public SecurityToken GetToken()
{
    WSHttpBinding binding = new WSHttpBinding(SecurityMode.TransportWithMessageCredential);
    binding.Security.Message.ClientCredentialType = MessageCredentialType.UserName;
    binding.Security.Message.EstablishSecurityContext = false;

    var endpoint = new EndpointAddress(stsUrl);

    using (var factory = new WSTrustChannelFactory(binding, endpoint))
    {
        factory.Credentials.UserName.UserName = username;
        factory.Credentials.UserName.Password = password;
        IWSTrustChannelContract channel = factory.CreateChannel();

        RequestSecurityToken request = new RequestSecurityToken
        {
            RequestType = RequestTypes.Issue,
            AppliesTo = new EndpointReference(audienceId),
            TokenType = "urn:oasis:names:tc:SAML:2.0:assertion"
        };

        return channel.Issue(request);
    }
}

The client won't decrypt the token, but rather will send it further to the CoreService when creating the connection. The token is only decrypted on the SDL Web server.

In the code below a ChannelFactory is created around the ISessionAwareCoreService generated proxy. Then we create an actual channel to the CoreService by passing the SAML token to the ChannelFactory in method CreateChannelWithIssuedToken.

The server decrypts the token, extracts the user in it and creates a security context for that user. During the established session, the operations with the web service happen in the name of the impersonated user.

SecurityToken token = GetToken();

using (var factory = new ChannelFactory<ISessionAwareCoreService>("coreServiceFederation"))
{
    factory.Credentials.UseIdentityConfiguration = true;
    ISessionAwareCoreService coreService = factory.CreateChannelWithIssuedToken(token);

    Console.WriteLine("API Version: {0}", coreService.GetApiVersion());

    UserData user = coreService.GetCurrentUser();
    Console.WriteLine("User: {0} | {1} | {2}", user.Title, user.Description, user.Id);
}



Comments

Popular posts from this blog

Running sp_updatestats on AWS RDS database

Part of the maintenance tasks that I perform on a MSSQL Content Manager database is to run stored procedure sp_updatestats . exec sp_updatestats However, that is not supported on an AWS RDS instance. The error message below indicates that only the sa  account can perform this: Msg 15247 , Level 16 , State 1 , Procedure sp_updatestats, Line 15 [Batch Start Line 0 ] User does not have permission to perform this action. Instead there are several posts that suggest using UPDATE STATISTICS instead: https://dba.stackexchange.com/questions/145982/sp-updatestats-vs-update-statistics I stumbled upon the following post from 2008 (!!!), https://social.msdn.microsoft.com/Forums/sqlserver/en-US/186e3db0-fe37-4c31-b017-8e7c24d19697/spupdatestats-fails-to-run-with-permission-error-under-dbopriveleged-user , which describes a way to wrap the call to sp_updatestats and execute it under a different user: create procedure dbo.sp_updstats with execute as 'dbo' as

Content Delivery Monitoring in AWS with CloudWatch

This post describes a way of monitoring a Tridion 9 combined Deployer by sending the health checks into a custom metric in CloudWatch in AWS. The same approach can also be used for other Content Delivery services. Once the metric is available in CloudWatch, we can create alarms in case the service errors out or becomes unresponsive. The overall architecture is as follows: Content Delivery service sends heartbeat (or exposes HTTP endpoint) for monitoring Monitoring Agent checks heartbeat (or HTTP health check) regularly and stores health state AWS lambda function: runs regularly reads the health state from Monitoring Agent pushes custom metrics into CloudWatch I am running the Deployer ( installation docs ) and Monitoring Agent ( installation docs ) on a t2.medium EC2 instance running CentOS on which I also installed the Systems Manager Agent (SSM Agent) ( installation docs ). In my case I have a combined Deployer that I want to monitor. This consists of an Endpoint and a

SDL Web 8 - Content Delivery Microservices

Among the new features in SDL Web 8 there are the Content Delivery Microservices, namely: Audience Manager Content Deployer Contextual Image Delivery Discovery Service Dynamic Content Dynamic Linking Profiling and Personalization Metadata Query Taxonomy User Generated Content These microservices make up the Content Interaction Services and they expose the existing Content Delivery in-process APIs as RESTful services. They provide the server-side component in a Services-Oriented Architecture and act as data layer between the the web client and the Content Delivery Storage Layer. According to the SDL marketing, these microservices: Simplify upgrades, thus offering shorter time to value Modernize architecture, offering better separation between the web application and Tridion APIs Offer more flexibility with less downtime and improved scalability Improve quality, being self-running, contained and having less dependencies In technical words, these microservices