Tag Archives: Security

Securing browser based Javascript, Typescript applications

This article should help you in choosing the right security for your browser based Javascript or Typescript applications. You should aim to secure the application as best as possible. The following diagram should help you in making your decision. Also for any of these flows, you should always use HTTPS. Appendix SPA: Single page application […]

Security Experiments with gRPC and ASP.NET Core 3.0

This article shows how a gRPC service could implement OAuth2 security using IdentityServer4 as the token service. Code: https://github.com/damienbod/Secure_gRpc Posts in this series Security Experiments with gRPC and ASP.NET Core 3.0 Running Razor Pages and a gRPC service in a single ASP.NET Core application gRPC Bi-directional streaming with Razor Pages and a Hosted Service gRPC […]

ASP.NET Core OAuth Device Flow Client with IdentityServer4

This article shows how to implement the OAuth 2.0 Device Flow for Browserless and Input Constrained Devices in an ASP.NET Core application. The tokens are then saved to a cookie for later usage. IdentityServer4 is used to implement the secure token server. Code: https://github.com/damienbod/AspNetCoreHybridFlowWithApi History 2019-02-24 Updated packages, API calls Note: The code in the […]

Is a SPA less secure than a server rendered web application?

In this post, I try to explain some of the differences between a single page application and a server rendered application and why the application types have different threat models. What is an Single Page Application (SPA)? A single page application runs in the browser, and handles routing in the client without posting back to […]

Using Azure Key Vault with ASP.NET Core and Azure App Services

This article shows how to use an Azure Key Vault with an ASP.NET Core application deployed as an Azure App Service. The Azure App Service can use the system assigned identity to access the Key Vault. This needs to be configured in the Key Vault access policies using the service principal. Code: https://github.com/damienbod/AspNetCoreBackChannelLogout Posts in […]

Implementing User Management with ASP.NET Core Identity and custom claims

The article shows how to implement user management for an ASP.NET Core application using ASP.NET Core Identity. The application uses custom claims, which need to be added to the user identity after a successful login, and then an ASP.NET Core policy is used to authorize the identity. Code: https://github.com/damienbod/AspNetCoreAngularSignalRSecurity Setting up the Project The demo […]

Disabling parts of ASP.NET Core Identity

This article shows how to disable parts of ASP.NET Core Identity in a Web Application. In the ASP.NET Core Identity, the Identiy UI is deployed as part of the NuGet package. So per default everything is enabled and you have to opt-out, unlike the older versions which was opt-in. If you are not careful, this […]