OpenIDConnect .Net 框架中的多租户

Question

我正在尝试实现多租户身份验证（我正在学习），到目前为止，我已经成功地在单租户中实现了我的应用程序的身份验证。

我用于单租户的代码是

 public void ConfigureAuth(IAppBuilder app)
        {

            app.SetDefaultSignInAsAuthenticationType(CookieAuthenticationDefaults.AuthenticationType);
            app.UseCookieAuthentication(new CookieAuthenticationOptions());
            app.UseOpenIdConnectAuthentication(
                 new OpenIdConnectAuthenticationOptions
                 {
                     ClientId = ConfigurationManager.AppSettings["AuthclientId"],
                     Authority = "https://login.microsoftonline.com/abc.onmicrosoft.com/",



                 });
        }

这里;首先，我在ABC AAD 中注册我的应用程序并获取客户端 ID，然后将其放入我的配置中。一切正常。

但现在我必须使用多租户类型来实现它。即使它是多租户的，我也只允许 2 个租户用户。假设abc.onmicrosoft.com 和contoso.onmicrosoft.com

到目前为止，我已经完成了在ABC 租户和Contoso 租户中注册我的应用程序，然后获得 2 个客户端 ID。但我的问题是无法在UseOpenIdConnectAuthentication 中提供 2 个客户端 ID（请参阅下面的更新代码）

public void ConfigureAuth(IAppBuilder app)
        {

            app.SetDefaultSignInAsAuthenticationType(CookieAuthenticationDefaults.AuthenticationType);
            app.UseCookieAuthentication(new CookieAuthenticationOptions());
            app.UseOpenIdConnectAuthentication(
                 new OpenIdConnectAuthenticationOptions
                 {

                     ClientId = ??,
                     Authority = "https://login.microsoftonline.com/common/",
                     TokenValidationParameters = new TokenValidationParameters
                     {
                         ValidateIssuer = false
                     },

                 });
        }

P.S 这对我来说是新的。我可能错了，请纠正我以使事情走上正确的道路

更新 1：

app.UseOpenIdConnectAuthentication(
             new OpenIdConnectAuthenticationOptions
             {

                 //ClientId = authClientID1,//App ID registered with 1st Tenant
                 Authority = "https://login.microsoftonline.com/common/",
                 RedirectUri= "https://localhost:44376/",
                 TokenValidationParameters = new TokenValidationParameters
                 {
                     ValidAudiences = new List<string>{ authClientID1, authClientID2 },
                     ValidateIssuer =true,
                     ValidIssuers= new[] { "https://sts.windows.net/<tenantID1>/", "https://sts.windows.net/<tenantID2>/" }
                 },

             });

评论 ClientID 后，我收到如下错误 AADSTS900144：请求正文必须包含以下参数： 'client_id'

我不确定如何提供我的两个 ClientID 和租户 ID，以便仅对来自我的两个租户的用户进行身份验证！

Answer 1

要交付多租户应用程序，您只需在 AAD 中创建一个应用程序。因此，您也只有 一个 client_id。确保您的应用已启用“多租户”。

您可以在这里找到很多信息：https://docs.microsoft.com/en-us/azure/active-directory/develop/howto-convert-app-to-be-multi-tenant

还有一个完整的示例可用：https://github.com/Azure-Samples/active-directory-dotnet-webapp-multitenant-openidconnect

   public void ConfigureAuth(IAppBuilder app)
    {         
        string ClientId = ConfigurationManager.AppSettings["ida:ClientID"];
        //fixed address for multitenant apps in the public cloud
        string Authority = "https://login.microsoftonline.com/common/";

        app.SetDefaultSignInAsAuthenticationType(CookieAuthenticationDefaults.AuthenticationType);

        app.UseCookieAuthentication(new CookieAuthenticationOptions { });

        app.UseOpenIdConnectAuthentication(
            new OpenIdConnectAuthenticationOptions
            {
                ClientId = ClientId,
                Authority = Authority,
                TokenValidationParameters = new System.IdentityModel.Tokens.TokenValidationParameters
                {
                    // instead of using the default validation (validating against a single issuer value, as we do in line of business apps), 
                    // we inject our own multitenant validation logic
                    ValidateIssuer = false,
                },
                Notifications = new OpenIdConnectAuthenticationNotifications()
                {
                    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);
                    },
                    // we use this notification for injecting our custom logic
                    SecurityTokenValidated = (context) =>
                    {
                        // retriever caller data from the incoming principal
                        string issuer = context.AuthenticationTicket.Identity.FindFirst("iss").Value;
                        string UPN = context.AuthenticationTicket.Identity.FindFirst(ClaimTypes.Name).Value;
                        string tenantID = context.AuthenticationTicket.Identity.FindFirst("http://schemas.microsoft.com/identity/claims/tenantid").Value;

                        if (
                            // the caller comes from an admin-consented, recorded issuer
                            (db.Tenants.FirstOrDefault(a => ((a.IssValue == issuer) && (a.AdminConsented))) == null)
                            // the caller is recorded in the db of users who went through the individual onboardoing
                            && (db.Users.FirstOrDefault(b =>((b.UPN == UPN) && (b.TenantID == tenantID))) == null)
                            )
                            // the caller was neither from a trusted issuer or a registered user - throw to block the authentication flow
                            throw new SecurityTokenValidationException();                            
                        return Task.FromResult(0);
                    },
                    AuthenticationFailed = (context) =>
                    {
                        context.OwinContext.Response.Redirect("/Home/Error?message=" + context.Exception.Message);
                        context.HandleResponse(); // Suppress the exception
                        return Task.FromResult(0);
                    }
                }
            });

    }

Answer 2

您的客户端 ID 应该是您的应用客户端 ID。您不会在另一个租户中创建另一个应用程序。将权限设置为 common 就足够了。如果您想允许任何租户，可以禁用颁发者验证。

然后，当其他租户的某人登录到您的应用时，系统会要求他们同意您所需的权限。一旦他们这样做，代表您的应用程序的服务主体会自动在他们的租户中创建。它具有相同的客户端 ID。