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Force MFA in Blazor using Azure AD and Continuous Access

This article shows how to force MFA from your application using Azure AD and a continuous access auth context. When producing software which can be deployed to multiple tenants, instead of hoping IT admins configure this correctly in their tenants, you can now force this from the application. Many tenants do not force MFA. Code: […]

Using math expressions in github markdown

This blog explores using and creating some standard mathematical expressions using github markdown. I was motivated to try this out after reading this blog. If you know the TEX Commands available in MathJax, then creating math documentation in github is a breeze. Github markdown uses MathJax. Code: I decided to try out some basic […]

Implement Azure AD Continuous Access (CA) standalone with Blazor ASP.NET Core

This post shows how to force an Azure AD policy using Azure AD Continuous Access (CA) in an ASP.NET Core Blazor application. An authentication context is used to require MFA. The “acrs” claim in the id_token is used to validate whether or not an Azure AD CAE policy has been fulfilled. If the claim is […]

Implementing OAuth2 Client credentials flow APP to APP security using Azure AD non interactive

This article shows how to implement the OAuth client credentials flow using the Microsoft.Identity.Client Nuget package and Azure AD to create an Azure App registration. The client application requires a secret which can be an Azure App registration or a certificate to request an access token. The token and only tokens created for this client […]

Secure a Blazor WASM ASP.NET Core hosted APP using BFF and OpenIddict

This article shows how to implement authentication and secure a Blazor WASM application hosted in ASP.NET Core using the backend for frontend (BFF) security architecture to authenticate. All security is implemented in the backend and the Blazor WASM is a view of the ASP.NET Core application, no security is implemented in the public client. The […]

Using Digital Signatures to check integrity of cipher texts in ASP.NET Core Razor Pages

This post shows how digital signatures can be implemented to check the integrity of cipher texts in ASP.NET Core Razor Pages. The cipher texts are encrypted with AES symmetric encryption and the key and the IV required to decrypt the texts are encrypted with asymmetric encryption using RSA certificates with a key size of 3072. […]

Getting started with Angular development 2020

This post shows how you could setup your development environment to create and manage Angular applications. Of course many other tools and ways could be used to develop Angular applications, not just the ones used here, but this setup works great for me. Install Node.js, npm or yarn, git Before you can install the Angular […]

Building and securing an ASP.NET Core API with a hosted Vue.js UI

This article shows how Vue.js can be used together with ASP.NET Core 3 in a single project. The Vue.js application is built using the Vue.js CLI and built to the wwwroot of the ASP.NET Core application. The ASP.NET Core application is used to implement the APIs consumed by the Vue.js UI. The application is secured […]

Using Certificate Authentication with IHttpClientFactory and HttpClient

This article shows how an HttpClient instance could be setup to send a certificate to an API to use for certificate authentication. In an ASP.NET Core application, the IHttpClientFactory can be used to get an instance of the HttpClient. Code Posts in this series Certificate Authentication in ASP.NET Core 3.0 (Self Signed) Using Chained […]

First experiments with makecode and micro:bit

At the MVP Global Summit, I heard about MakeCode for the first time. The project makes it really easy for people to get a first contact, introduction with code and computer science. I got the chance to play around with the Micro:bit which has a whole range of sensors and can easily be programmed from […]