Category Security

Implementing Angular Code Flow with PKCE using node-oidc-provider

This posts shows how an Angular application can be secured using Open ID Connect code flow with PKCE and node-oidc-provider identity provider. This requires the correct configuration on both the client and the identity provider. The node-oidc-provider clients need a configuration for the public client which uses refresh tokens. The grant_types ‘refresh_token’, ‘authorization_code’ are added […]

Improving application security in an ASP.NET Core API using HTTP headers – Part 3

This article shows how to improve the security of an ASP.NET Core Web API application by adding security headers to all HTTP API responses. The security headers are added using the NetEscapades.AspNetCore.SecurityHeaders Nuget package from Andrew Lock. The headers are used to protect the session, not for authorization. The application uses Microsoft.Identity.Web to authorize the […]

Improving application security in Blazor using HTTP headers – Part 2

This article shows how to improve the security of an ASP.NET Core Blazor application by adding security headers to all HTTP Razor Page responses (Blazor WASM hosted in a ASP.NET Core hosted backend). The security headers are added using the NetEscapades.AspNetCore.SecurityHeaders Nuget package from Andrew Lock. The headers are used to protect the session, not […]

Improving application security in ASP.NET Core Razor Pages using HTTP headers – Part 1

This article shows how to improve the security of an ASP.NET Core Razor Page application by adding security headers to all HTTP Razor Page responses. The security headers are added using the NetEscapades.AspNetCore.SecurityHeaders Nuget package from Andrew Lock. The headers are used to protect the session, not for authentication. The application is authenticated using Open […]

Send Emails using Microsoft Graph API and a desktop client

This article shows how to use Microsoft Graph API to send emails for a .NET Core Desktop WPF application. Microsoft.Identity.Client is used to authenticate using an Azure App registration with the required delegated scopes for the Graph API. The emails can be sent with text or html bodies and also with any file attachments uploaded […]

Securing an Angular app which uses multiple identity providers

Sometimes Angular applications are required to authenticate against multiple identity providers. This blog post shows how to implement an Angular SPA which authenticates using Auth0 for one identity provider and also IdentityServer4 from Duende software as the second. The SPA can logout from both of the identity providers individually and also revoke the refresh token […]

Securing ASP.NET Core Razor Pages, Web APIs with Azure B2C external and Azure AD internal identities

This article shows how to implement an ASP.NET Core Razor page to authenticate against Azure B2C and use Web APIs from a second ASP.NET Core application which are also protected using Azure B2C App registrations. Azure B2C uses the signin, signup user flow and allows identities to authenticate using an Azure AD single tenant. Two […]

Sign-in using multiple clients or tenants in ASP.NET Core and Azure AD

The article shows how an ASP.NET Core application could implement a sign in and a sign out with two different Azure App registrations which could also be implemented using separate identity providers (tenants). The user of the application can decide to authenticate against either one of the Azure AD clients. The clients can also be […]

Verify vaccination data using Zero Knowledge Proofs with ASP.NET Core and MATTR

This article shows how Zero Knowledge Proofs ZKP verifiable credentials can be used to verify a persons vaccination data implemented in ASP.NET Core and MATTR. The ZKP BBS+ verifiable credentials are issued and stored on a digital wallet using a Self-Issued Identity Provider (SIOP) and Open ID Connect. The data can then be used to […]

Secure an Angular SPA and an ASP.NET Core API using Auth0

This article shows how to implement an Angular single page application with an ASP.NET Core API and secured using the Open ID Connect code flow with PKCE and OAuth JWT Bearer tokens to protect the API. The identity provider is implemented using Auth0. The flow uses refresh tokens to renew the SPA session and the […]