Category App Service

Invite external users to Azure AD using Microsoft Graph and ASP.NET Core

This post shows how to invite new Azure AD external guest users and assign the users to Azure AD groups using an ASP.NET Core APP Connector to import or update existing users from an external IAM and synchronize the users in Azure AD. The authorization can be implemented using Azure AD groups and can be […]

Using Blazor with a YARP downstream API protected using certificate authentication

This article shows how to use a downstream API protected with certificate authentication using Microsoft YARP reverse proxy from a Blazor application. The Blazor WASM HTTP requests are sent to a secured backend which uses YARP to forward the requests to the API protected with the certificate authentication. The Blazor application authenticates using the OpenIddict […]

Implement a PWA using Blazor with BFF security and Azure B2C

The article shows how to implement a progressive web application (PWA) using Blazor which is secured using the backend for frontend architecture and Azure B2C as the identity provider. Code https://github.com/damienbod/PwaBlazorBffAzureB2C Setup and challenges with PWAs The application is setup to implement all security in the trusted backend and reduce the security risks of the […]

Blazor WASM hosted in ASP.NET Core templates with Azure B2C and Azure AD authentication using Backend for Frontend (BFF)

I have implemented many Blazor WASM ASP.NET Core hosted applications now for both Azure AD and Azure B2C authentication. I always implement security for this type of application now using the Backend for Frontend (BFF) security architecture and can remove the tokens from the client. This is also what I recommend. At present, no Microsoft […]

Implement certificate authentication in ASP.NET Core for an Azure B2C API connector

This article shows how an ASP.NET Core API can be setup to require certificates for authentication. The API is used to implement an Azure B2C API connector service. The API connector client uses a certificate to request profile data from the Azure App Service API implementation, which is validated using the certificate thumbprint. Code: https://github.com/damienbod/AspNetCoreB2cExtraClaims […]

Secure Azure AD User File Upload with Azure AD Storage and ASP.NET Core

This post shows how files can be uploaded to Azure blob storage using ASP.NET Core in a secure way using OAuth and Open ID Connect. Azure AD is used to authenticate the users. The uploaded file descriptions are saved to an SQL database using EF Core so that listing or searching files can be implemented […]

Using multiple APIs in Angular and ASP.NET Core with Azure AD authentication

This article shows how an Angular application could be used to access many APIs in a secure way. An API is created specifically for the Angular UI and the further APIs can only be access from the trusted backend which is under our control. Code: https://github.com/damienbod/AzureADAuthRazorUiServiceApiCertificate Posts in this series Implement Azure AD Client credentials […]

Implement a Web APP and an ASP.NET Core Secure API using Azure AD which delegates to a second API

This article shows how an ASP.NET Core Web application can authenticate and access a downstream API using user access tokens and delegate to another API in Azure AD also using user access tokens. Microsoft.Identity.Web is used in all three applications to acquire the tokens for the Web API and the access tokens for the two […]

Using Key Vault certificates with Microsoft.Identity.Web and ASP.NET Core applications

This post shows how Azure Key Vault certificates can be used with Microsoft.Identity.Web in an ASP.NET Core application which requires a downstream “access_as_user” API. The Azure AD App Registrations requires a certificate instead of a client secret. Code: https://github.com/damienbod/AzureADAuthRazorUiServiceApiCertificate Posts in this series Implement Azure AD Client credentials flow using Client Certificates for service APIs […]

Implement Azure AD Client credentials flow using Client Certificates for service APIs

This post shows how to implement an Azure client credential flows to access an API for a service-to-service connection. No user is involved in this flow. A client certificate (Private Key JWT authentication) is used to get the access token and the token is used to access the API which is then used and validated […]