Security posts

Always check permissions in tokens in an Azure AD protected API

Posted on: 05-08-2019

Failing to check for permissions in Azure AD access tokens leads to your API being vulnerable

Why you should not put secrets in native applications

Posted on: 29-05-2019

The dangers of embedding secrets in native applications, and how to implement Azure AD authentication there without secrets

Keeping secrets out of version control in .NET applications

Posted on: 26-05-2019

Goes through methods of storing secrets in a way where they cannot end up in the shared code repository

Best practices for N-tenant Azure AD applications

Posted on: 21-05-2019

Some things to watch out for in your multi-tenant Azure AD applications that support a limited number of tenants

Resource Owner Password Credentials grant flow in Azure AD

Posted on: 05-05-2019

What is the OAuth ROPC flow, why it exists, and why you should not use it for most cases

Using groups vs using application roles for authorization in Azure AD apps

Posted on: 21-04-2019

Compares two approaches to high-level authorization in an application: groups and app roles

Using Azure Key Vault and Azure Storage to store Data Protection keys with ASP.NET Core

Posted on: 07-04-2019

A look at how ASP.NET Core's Data Protection can be setup in a good way using Azure services

Implementing Azure AD Single Sign-Out in ASP.NET Core

Posted on: 23-11-2018

Single Sign-Out enables you to clear the user's session immediately when they sign out from another app

Accessing Azure Service Bus with Managed Identities

Posted on: 03-11-2018

Sending and receiving Azure Service Bus Queue messages with zero credentials utilizing Azure Managed Identities

Azure AD Authentication in ASP.NET Core APIs part 2: Custom permissions, multi-tenant APIs

Posted on: 02-08-2018

In the second part we add custom delegated and application permissions to an ASP.NET Core API and also talk about multi-tenancy.

Hi! My name is Joonas Westlin, I'm a software developer who blogs about ASP.NET, Azure, and Web development.

Azure MVP, Azure Solutions Architect Expert, Azure Developer Associate, MCSE: Cloud Platform and Infrastructure, MCSD: App Builder.