Category dotnet
Implement a Microsoft Entra ID external authentication method using ASP.NET Core and OpenIddict
The article shows how to implement a Microsoft Entra ID external authentication method (EAM) using ASP.NET Core, OpenIddict and FIDO2/passkeys. The application using ASP.NET Core Identity to manage the accounts and the passkeys. Code: https://github.com/damienbod/MfaServer The following flow diagram from the Microsoft docs explains how EAM works. Refer to the documentation for a full explanation. […]
Using SonarCloud with ASP.NET Core, Angular and github actions
This article demonstrates how to implement code analysis and Static Application Security Testing (SAST) using SonarCloud and GitHub Actions. The solution involves building a secure web application with ASP.NET Core for the backend and an Angular UI for the frontend, following a backend-for-frontend security architecture. Both the ASP.NET Core (C#) codebase and the Angular (TypeScript […]
Implement a secure Blazor Web application using OpenID Connect and security headers
This article shows how to implement a secure .NET 8 Blazor Web application using OpenID Connect and security headers with CSP nonces. The NetEscapades.AspNetCore.SecurityHeaders nuget package is used to implement the security headers and OpenIddict is used to implement the OIDC server. Code: https://github.com/damienbod/BlazorWebOidc OpenIddict is used as the identity provider and an OpenID connect […]
BFF secured ASP.NET Core application using downstream API and an OAuth client credentials JWT
This article shows how to implement a web application using backend for frontend security architecture for authentication and consumes data from a downstream API protected using a JWT access token which can only be accessed using an app-to-app access token. The access token is acquired using the OAuth2 client credentials flow and the API does […]
Delegated read and application write access to blob storage using ASP.NET Core with Entra ID authentication
This article shows how an ASP.NET Core application can control the write access to an Azure blob storage container using an application app registration. Microsoft Entra ID is used to control the user access and to implement the authentication of the web application. Code: https://github.com/damienbod/AspNetCoreEntraIdBlobStorage Blogs in this series The solution provides a secure upload […]
Securing a Blazor Server application using OpenID Connect and security headers
This article shows how to secure a Blazor Server application. The application implements an OpenID Connect confidential client with PKCE using .NET 8 and configures the security headers as best possible for the Blazor Server application. OpenIddict is used to implement the identity provider and the OpenID Connect server. Code: https://github.com/damienbod/BlazorServerOidc OpenID Connect flow In […]
Securing a MudBlazor UI web application using security headers and Microsoft Entra ID
This article shows how a Blazor application can be implemented in a secure way using MudBlazor UI components and Microsoft Entra ID as an identity provider. The MudBlazor UI components adds some inline styles and requires a specific CSP setup due to this and the Blazor WASM script requirements. Code: https://github.com/damienbod/MicrosoftEntraIDMudBlazor Setup The application is […]
Authentication with multiple identity providers in ASP.NET Core
This article shows how to implement authentication in ASP.NET Core using multiple identity providers or secure token servers. When using multiple identity providers, the authentication flows need to be separated per scheme for the sign-in flow and the sign-out flow. The claims are different and would require mapping logic depending on the authorization logic of […]
Use multiple Microsoft Entra Verified ID credentials in a verification presentation
This post shows how a Microsoft Entra ID verified employee credential can be used together with a self attestation credential to unlock a door. Using this, a person can prove they know a code and prove their employee status. Code: https://github.com/swiss-ssi-group/EntraEmployeeUnlockDoor Get your Verified Employee credential To use this app, the Microsoft Entra employee credential […]
Provision Azure IoT Hub devices using DPS and X.509 certificates in ASP.NET Core
This article shows how to provision Azure IoT hub devices using Azure IoT hub device provisioning services (DPS) and ASP.NET Core. The devices are setup using chained certificates created using .NET Core and managed in the web application. The data is persisted in a database using EF Core and the certificates are generated using the […]
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