A ContactLOB line-of-business application sample - Login: Silverlight, MVVM, WCF RIA Services

using System.Security.Principal;
using System.ServiceModel.DomainServices.Hosting;
using System.ServiceModel.DomainServices.Server.ApplicationServices;

namespace ContactLOB.Web.Services
{
	/// <summary>
	/// RIA Services DomainService responsible for authenticating users when
	/// they try to log on to the application.
	///
	/// Most of the functionality is already provided by the base class
	/// AuthenticationBase
	/// </summary>
	[EnableClientAccess]
	public class AuthenticationDomainService : AuthenticationBase<WebUser>
	{
		protected override WebUser GetAuthenticatedUser(IPrincipal principal)
		{
			// TODO: Add code to retreive user info from database
			WebUser user = new WebUser();
			user.Name = principal.Identity.Name;
			user.FirstName = "Bill";
			user.LastName = "Gates";

			return user;
		}

		protected override bool ValidateUser(string userName, string password)
		{
			// TODO: Add code to check user credentials against database
			string usrName = "demo";
			string pswHash = "fe01ce2a7fbac8fafaed7c982a04e229";
			return (usrName.Equals(userName) && pswHash.Equals(password));
		}
	}

	public class WebUser : UserBase
	{
		public string UserId { get; set; }
		public string FirstName { get; set; }
		public string LastName { get; set; }
		public bool IsAdmin { get; set; }
	}
}