Implementation of Windows Azure Authentication in Asp.net MVC

Windows Azure Authentication in Asp.net

How we implement windows azure authentication in asp.net web applications?

Code in Home View

@{

    /**/

    ViewBag.Title = "Windows Azure Athentications";

}

<h2>Index</h2>

@if (Session["UniqueName"] != null)

{<text>

        Windows Azure Authentication -  Given Name:   @Session["UniqueName"].ToString() </text>

}

@using (Html.BeginForm("Login", "Home", FormMethod.Post))

{

    <input type="submit" value="Login" />

    

}

Code in Home Controller

        private static string clientId = WebConfigurationManager.AppSettings["ClientId"];

        private static string appKey = WebConfigurationManager.AppSettings["AppKey"];

        private static string aadInstance = WebConfigurationManager.AppSettings["AADInstance"];

        private static string tenant = WebConfigurationManager.AppSettings["Tenant"];

        private static string redirectUri = WebConfigurationManager.AppSettings["RedirectUri"];

        public static readonly string Authority = String.Format(CultureInfo.InvariantCulture, aadInstance, tenant);

        // GET: AADAuth

        public ActionResult Index()

        {

            return View();

        }

        public ActionResult Login()

        {

            AuthenticationContext authContext = new AuthenticationContext(Authority);

            AuthenticationResult result = null;

            Uri uri = new Uri(redirectUri);

            result = authContext.AcquireTokenAsync("https://graph.windows.net", clientId, uri, new PlatformParameters(PromptBehavior.SelectAccount)).Result;

            Session["UniqueName"] = result.UserInfo.GivenName;

            return RedirectToAction("Index", "Home");

        }

       

        public void GetAuthorizationCode()

        {

            JObject response = new JObject();

            var parameters = new Dictionary<string, string>

                {

                    { "response_type", "code" },

                    { "client_id", clientId },

                    { "redirect_uri", redirectUri },

                    { "prompt", "login"},

                    { "scope", "openid"}

                };

            var requestUrl = string.Format("{0}/authorize?{1}", EndPointUrl, BuildQueryString(parameters));

            Response.Redirect(requestUrl);

        }

        public string AcquireTokenWithResource(string resource)

        {

            var code = Request.Params["code"];

            Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext ac = new Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext(string.Format("https://login.microsoftonline.com/{0}", tenant

                                  ));

            ClientCredential clcred =

                new ClientCredential(clientId, appKey);

            var token =

                ac.AcquireTokenByAuthorizationCodeAsync(code,

                           new Uri(redirectUri), clcred, resource).Result.AccessToken;

            return token;

        }

        private string BuildQueryString(IDictionary<string, string> parameters)

        {

            var list = new List<string>();

            foreach (var parameter in parameters)

            {

                list.Add(string.Format("{0}={1}", parameter.Key, HttpUtility.UrlEncode(parameter.Value)));

            }

            return string.Join("&", list);

        }

        protected string EndPointUrl

        {

            get

            {

                return string.Format("{0}/{1}/{2}", "https://login.microsoftonline.com", tenant, @"oauth2/");

            }

        }

    }

 This is code for the implementation of  Azure authentication.