Tag Archives: ASP.NET Core

Implement the On Behalf Of flow between an Azure AD protected API and an API protected using OpenIddict

This article shows how to implement the On Behalf Of flow between two APIs, one using Azure AD to authorize the HTTP requests and a second API protected using OpenIddict. The Azure AD protected API uses the On Behalf Of flow (OBO) to get a new OpenIddict delegated access token using the AAD delegated access […]

ASP.NET Core Api Auth with multiple Identity Providers

This article shows how an ASP.NET Core API can be secured using multiple access tokens from different identity providers. ASP.NET Core schemes and policies can be used to set this up. Code: https://github.com/damienbod/AspNetCoreApiAuthMultiIdentityProvider The ASP.NET Core API has a single API and needs to accept access tokens from three different identity providers. Auth0, OpenIddict and […]

Secure ASP.NET Core GRPC API hosted in a Linux kestrel Azure App Service

This article shows how to implement a secure GRPC API service implemented in ASP.NET Core and hosted on an Azure App Service using Linux and kestrel. An application Azure App registration is used to implement the security together with Microsoft.Identity.Web. A client credentials flow is used to acquire an application access token and the GRPC […]

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 […]

Add Fido2 MFA to an OpenIddict identity provider using ASP.NET Core Identity

This article shows how to add Fido2 multi-factor authentication to an OpenID Connect identity provider using OpenIddict and ASP.NET Core Identity. OpenIddict implements the OpenID Connect standards and ASP.NET Core Identity is used for the user accounting and persistence of the identities. Code: https://github.com/damienbod/AspNetCoreOpeniddict I began by creating an OpenIddict web application using ASP.NET Core […]

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: […]

Implement Azure AD Continuous Access in an ASP.NET Core Razor Page app using a Web API

This article shows how Azure AD continuous access (CA) can be used in an ASP.NET Core UI application to force MFA when using an administrator API from a separate ASP.NET Core application. Both applications are secured using Microsoft.Identity.Web. An ASP.NET Core Razor Page application is used to implement the UI application. The API is implemented […]

Implementing OAuth2 APP to APP security using Azure AD from a Web APP

This article shows how to implement an API service and client in separate ASP.NET Core applications which are secured using Azure application permissions implemented in an Azure App registration. The OAuth client credentials flow is used to get an access token to access the API. Microsoft.Identity.Web is used to implement the client credentials (CC) flow. […]

Onboarding new users in an ASP.NET Core application using Azure B2C

This article shows how to onboard new users into your ASP.NET Core application using Azure B2C as the identity provider and the account management. The software has application specific persisted user data and this user data needs to be connected to the identity data from the corresponding user in Azure B2C. Code https://github.com/damienbod/azureb2c-fed-azuread User Case […]

Transforming identity claims in ASP.NET Core and Cache

The article shows how to add extra identity claims to an ASP.NET Core application which authenticates using the Microsoft.Identity.Web client library and Azure AD B2C or Azure AD as the identity provider (IDP). This could easily be switched to OpenID Connect and use any IDP which supports OpenID Connect. The extra claims are added after […]