Set WCF ClientCredentials in App.config

Question

Is it possible to set clientcredentials for an WCF in App.config?

I would like to avoid doing this:

Using svc As New MyServiceClient
  svc.ClientCredentials.UserName.UserName = "login"
  svc.ClientCredentials.UserName.Password = "pw"

  ...
End Using

Rather the login and password should be part of the configuration.

Answer 1

Expanding on Ladislav Mrnka’s answer, you might find this implementation useful:

public class UserNameClientCredentials : ClientCredentialsElement
{
    private ConfigurationPropertyCollection properties;

    public override Type BehaviorType
    {
        get { return typeof (ClientCredentials); }
    }

    /// <summary>
    /// Username (required)
    /// </summary>
    public string UserName
    {
        get { return (string) base["userName"]; }
        set { base["userName"] = value; }
    }

    /// <summary>
    /// Password (optional)
    /// </summary>
    public string Password
    {
        get { return (string) base["password"]; }
        set { base["password"] = value; }
    }

    protected override ConfigurationPropertyCollection Properties
    {
        get
        {
            if (properties == null)
            {
                ConfigurationPropertyCollection baseProps = base.Properties;
                baseProps.Add(new ConfigurationProperty(
                                  "userName",
                                  typeof (String),
                                  null,
                                  null,
                                  new StringValidator(1),
                                  ConfigurationPropertyOptions.IsRequired));
                baseProps.Add(new ConfigurationProperty(
                                  "password",
                                  typeof (String),
                                  ""));
                properties = baseProps;
            }
            return properties;
        }
    }

    protected override object CreateBehavior()
    {
        var creds = (ClientCredentials) base.CreateBehavior();
        creds.UserName.UserName = UserName;
        if (Password != null) creds.UserName.Password = Password;
        ApplyConfiguration(creds);
        return creds;
    }
}

After which you need to register this custom implementation using something like

<system.serviceModel>
  <extensions>
    <behaviorExtensions>
      <add name="UserNameClientCredentials" type="MyNamespace.UserNameClientCredentials, MyAssembly, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
    </behaviorExtensions>
  </extensions>
...

Answer 2

This is what I did to get the new auth to work

Expanding further on Mormegil's answer this is how to use the customBehavior implementation.

public class UserNameClientCredentialsElement : ClientCredentialsElement
{ // class renamed only to follow the configuration pattern
   ... // using Mormegil's implementation
}

After which you need to:

1. Register the behaviorExtension.
2. Define a new behaviorConfig using the config extension. (which was the tricky part, coverage is scarce on how to do this.)
3. Apply the config to an endpoint.

Using something like:

<system.serviceModel>
  <client><!--(3)-->
    <endpoint ...YourEndpointConfig... behaviorConfiguration="UserNamePasswordBehavior" />
  </client>
  <behaviors><!--(2)-->
    <endpointBehaviors>
      <behavior name="UserNamePasswordBehavior">
        <userNameClientCredentials userName="skroob" password="12345" />
        <!--Visual Studio will give you warning squiggly on <userNameClientCredentials>
            saying that "The element 'behavior' has invalid child element" 
            but will work at runtime.-->
      </behavior>
    </endpointBehaviors>
  </behaviors>
  <extensions><!--(1)-->
    <behaviorExtensions>
      <add name="userNameClientCredentials" type="MyNamespace.UserNameClientCredentialsElement, MyAssembly, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
    </behaviorExtensions>
  </extensions>
  ...
</system.serviceModel>