Startup.Auth.cs

// Copyright (c) Microsoft. All rights reserved. Licensed under the MIT license. See full license at the bottom of this file.
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.Cookies;
using Microsoft.Owin.Security.OpenIdConnect;
using O365_APIs_Start_ASPNET_MVC.Models;
using O365_APIs_Start_ASPNET_MVC.Utils;
using Owin;
using System;
using System.IdentityModel.Claims;
using System.Threading.Tasks;
using System.Web;

namespace O365_APIs_Start_ASPNET_MVC
{
    public partial class Startup
    {
        public void ConfigureAuth(IAppBuilder app)
        {
            app.SetDefaultSignInAsAuthenticationType(CookieAuthenticationDefaults.AuthenticationType);

            app.UseCookieAuthentication(new CookieAuthenticationOptions());

            app.UseOpenIdConnectAuthentication(
                new OpenIdConnectAuthenticationOptions
                {
                    ClientId = SettingsHelper.ClientId,
                    Authority = SettingsHelper.Authority,

                    //TokenValidationParameters = new System.IdentityModel.Tokens.TokenValidationParameters
                    //{
                    //    // Use the default validation (validating against a single issuer value, in line of business apps (single tenant apps))
                    //    //
                    //    // NOTE:
                    //    // * In a multitenant scenario, you can never validate against a fixed issuer string, as every tenant will send a different one.
                    //    // * If you don’t care about validating tenants, as is the case for apps giving access to 1st party resources, you just turn off validation.
                    //    // * If you do care about validating tenants, think of the case in which your app sells access to premium content and you want to limit access only to the tenant that paid a fee, 
                    //    //       you still need to turn off the default validation but you do need to add logic that compares the incoming issuer to a list of tenants that paid you, 
                    //    //       and block access if that’s not the case.
                    //    // * Refer to the following sample for a custom validation logic: https://github.com/AzureADSamples/WebApp-WebAPI-MultiTenant-OpenIdConnect-DotNet

                    //    ValidateIssuer = true
                    //},

                    Notifications = new OpenIdConnectAuthenticationNotifications()
                    {
                        //
                        // If there is a code in the OpenID Connect response, redeem it for an access token and refresh token, and store those away.

                        AuthorizationCodeReceived = (context) =>
                        {
                            var code = context.Code;

                            ClientCredential credential = new ClientCredential(SettingsHelper.ClientId, SettingsHelper.ClientSecret);
                            String UserObjectId = context.AuthenticationTicket.Identity.FindFirst(ClaimTypes.NameIdentifier).Value;

                            AuthenticationContext authContext = new AuthenticationContext(SettingsHelper.Authority, new ADALTokenCache(UserObjectId));

                            authContext.AcquireTokenByAuthorizationCode(code, new Uri(HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Path)), credential, SettingsHelper.AADGraphResourceId);

                            return Task.FromResult(0);
                        },


                        RedirectToIdentityProvider = (context) =>
                        {
                            // This ensures that the address used for sign in and sign out is picked up dynamically from the request
                            // this allows you to deploy your app (to Azure Web Sites, for example)without having to change settings
                            // Remember that the base URL of the address used here must be provisioned in Azure AD beforehand.
                            string appBaseUrl = context.Request.Scheme + "://" + context.Request.Host + context.Request.PathBase;
                            context.ProtocolMessage.RedirectUri = appBaseUrl + "/";
                            context.ProtocolMessage.PostLogoutRedirectUri = appBaseUrl;

                            return Task.FromResult(0);
                        },

                        AuthenticationFailed = (context) =>
                        {
                            // Suppress the exception if you don't want to see the error
                            context.HandleResponse();

                            return Task.FromResult(0);
                        }

                    }

                });
        }
    }
}
//*********************************************************  
//  
//O365 APIs Starter Project for ASPNET MVC, https://github.com/OfficeDev/Office-365-APIs-Starter-Project-for-ASPNETMVC
// 
//Copyright (c) Microsoft Corporation 
//All rights reserved.  
// 
//MIT License: 
// 
//Permission is hereby granted, free of charge, to any person obtaining 
//a copy of this software and associated documentation files (the 
//""Software""), to deal in the Software without restriction, including 
//without limitation the rights to use, copy, modify, merge, publish, 
//distribute, sublicense, and/or sell copies of the Software, and to 
//permit persons to whom the Software is furnished to do so, subject to 
//the following conditions: 
// 
//The above copyright notice and this permission notice shall be 
//included in all copies or substantial portions of the Software. 
// 
//THE SOFTWARE IS PROVIDED ""AS IS"", WITHOUT WARRANTY OF ANY KIND, 
//EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
//MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
//NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 
//LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 
//OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
//WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
//  
//*********************************************************