Web Form (IFD) Authentication

using System;
using System.Xml;
using System.Text;
using System.Web.Services.Protocols;

// Microsoft Dynamics CRM namespaces.
// Note that the Visual Studio project name is IFD_Authentication.
using IFD_Authentication.CrmSdk;
using IFD_Authentication.CrmSdk.Discovery;

public class IFDConnection
{
    // A CrmService reference.
    public readonly CrmService CrmService = null;

    // URL of the Web application.
    public readonly string WebApplicationUrl = String.Empty;

    // GUID of the user's organization.
    public readonly Guid OrganizationId = Guid.Empty; 

    /// <summary>
    /// Authenticate the user using IFD (Internet Facing Deployment). The class
    /// constructor sets the values of the public variables (CrmService, etc).
    /// </summary>
    /// <param name="organization">Name of the user's organization.</param>
    /// <param name="server">Microsoft Dynamics CRM server URL.
    /// For example: https://myserver.</param>
    /// <param name="domain">Name of the domain hosting the user's system
    /// account.</param>
    /// <param name="username">User's system account name.</param>
    /// <param name="password">User's account password.</param>
    public IFDConnection(string organization, string server, string domain,
                         string username, string password)
    {
        //Remove any trailing forward slash from the end of the server URL.
        server = server.TrimEnd(new char[] { '/' });

        // Initialize an instance of the CrmDiscoveryService Web service proxy.
        CrmDiscoveryService disco = new CrmDiscoveryService();
        disco.Url = server + "/MSCRMServices/2007/SPLA/CrmDiscoveryService.asmx";

        //Retrieve a list of available organizations.
        RetrieveOrganizationsRequest orgRequest = 
            new RetrieveOrganizationsRequest();
        orgRequest.UserId = domain + "\\" + username;
        orgRequest.Password = password;
        RetrieveOrganizationsResponse orgResponse =
            (RetrieveOrganizationsResponse)disco.Execute(orgRequest);

        //Find the desired organization.
        foreach (OrganizationDetail orgdetail in orgResponse.OrganizationDetails)
        {
            if (orgdetail.OrganizationName == organization)
            {
                //Retrieve the ticket.
                RetrieveCrmTicketRequest ticketRequest = 
                    new RetrieveCrmTicketRequest();
                ticketRequest.OrganizationName = organization;
                ticketRequest.UserId = domain + "\\" + username;
                ticketRequest.Password = password;
                RetrieveCrmTicketResponse ticketResponse = 
                    (RetrieveCrmTicketResponse)disco.Execute(ticketRequest);

                //Create the CrmService Web service proxy.
                CrmAuthenticationToken sdktoken = new CrmAuthenticationToken();
                sdktoken.AuthenticationType = 2;
                sdktoken.OrganizationName = organization;
                sdktoken.CrmTicket = ticketResponse.CrmTicket;

                CrmService = new CrmService();
                CrmService.CrmAuthenticationTokenValue = sdktoken;
                CrmService.Url = orgdetail.CrmServiceUrl;

                WebApplicationUrl = orgdetail.WebApplicationUrl;
                OrganizationId = orgdetail.OrganizationId;

                break;
            }
        }
    }
}