Tag Archives: Security
Implement BFF using Auth0, Angular and ASP.NET Core
This post should how to implement a web application which needs secure access and secure identities. The application uses Angular as the UI tech, ASP.NET Core as the backend tech and a backend for frontend security architecture using OpenID Connect, OAuth and Auth0 as the identity provider. Code: https://github.com/damienbod/Auth0BffDpopApi Blogs in this series Target setup […]
Implement SAML as an external provider in an ASP.NET Core Identity application using Duende as an OIDC server
This article shows how to implement a SAML federation from an ASP.NET Core Identity application using Sustainsys.Saml2.AspNetCore2. Entra ID is used to implement the SAML authentication and the users can authenticate from the tenant. Code: https://github.com/damienbod/DuendeEntraSaml Setup Three components are used to implement this demo, a web application that authenticates using OpenID Connect, an ASP.NET […]
Remove sign-up from Entra External ID user flows
This article shows how to remove the sign-up flow from Entra External ID user flows. This is required because SMS and Phone validation can be abused by bots to run up costs on the tenant. The bots create accounts and start a phone validation or a SMS validation which is charged to the tenant. The […]
Invite Guest users in a Entra ID Multi-tenant setup
This post looks at implementing a guest user invite in a cross tenant setup. This is useful when creating partner tenants using an Entra ID MAU license for all partner guests and members. This makes it possible to keep the home tenant separated for internal members. Setup The Partners or guest Entra ID tenant is […]
Add application security to the swiyu generic management verifier APIs using OAuth
The article looks at implementing security using OAuth for the swiyu Public Beta Trust Infrastructure generic containers. The container provides endpoint for OpenID verification and the management APIs. The OpenID endpoints are publicly accessible using a reverse proxy, the management APIs can only be accessed in the network and using an access token for app […]
Use client assertions in ASP.NET Core using OpenID Connect, OAuth DPoP and OAuth PAR
This post looks at implement client assertions in an ASP.NET Core application OpenID Connect client using OAuth Demonstrating Proof of Possession (DPoP) and OAuth Pushed Authorization Requests (PAR). Code: https://github.com/swiss-ssi-group/swiyu-passkeys-idp-loi-loa Blogs in this series: Setup An ASP.NET code application is setup to authentication using OpenID Connect and OAuth PAR. The web application is an OIDC […]
Force step up authentication in web applications
The post shows how to implement a step up authorization using the OAuth 2.0 Step Up Authentication Challenge Protocol RFC 9470. The application uses ASP.NET Core to implement the API, the web application and the identity provider. Duende IdentityServer is used to implement the OpenID Connect server standard and also OAuth DPoP token binding as […]
Set the amr claim when using passkeys authentication in ASP.NET Core
The post shows how to set the correct amr value when authenticating using ASP.NET Core Identity and passkeys in .NET 10. When authenticating using OpenID Connect and passkeys authentication, the OpenID Connect Extended Authentication Profile (EAP) ACR Values 1.0 specification should be used for the implementation. The amr claim should return the pop value. Blogs […]
Digital Authentication and Identity validation
This post looks at authentication and identity validation and describes what should be validated and some of the concepts. With the increasing push to move processes to a digital world and the new threat models, authentication and identity validation MUST be implemented in a professional way. Using standards like OpenID Connect, OAuth and OpenID VCs […]
Reset Cookies and force new sign-in using ASP.NET Core Identity
This post looks at implementing a cookie reset in an ASP.NET Core application using Duende identity server which federates to Entra ID. Sometimes cookies need to be reset for end users due to size problems, or unknown remote authentication server errors. The cookies can be cleared and a new sign in can be forced. Code: […]
Software Engineering 