Category .NET

Encrypting texts for an Identity in ASP.NET Core Razor Pages using AES and RSA

The article shows how encrypted texts can be created for specific users in an ASP.NET Core Razor page application. Symmetric encryption is used to encrypt the text or the payload. Asymmetric encryption is used to encrypt the AES key and the IV of the symmetric encryptions. Each ASP.NET Core Identity has an associated X509Certificate2 with […]

Symmetric and Asymmetric Encryption in .NET Core

This post looks at symmetric and asymmetric encryption and how this could be implemented in .NET Core. Symmetric encryption is fast and can encrypt or decrypt large amounts of text, streams or files but requires a shared key. Asymmetric encryption can be used without shared a key, but can only encrypt or decrypt small texts […]

Publish Nuget packages in Azure DevOps Pipelines

In Azure DevOps, Pipelines can be used to build your solution, create a Nuget package and publish the Nuget package to the Nuget feed for further usage. This post shows how you can implement this and use the new Nuget package in Visual Studio. Setup Azure DevOps project and git Repository Open the required Azure […]

Provisioning X.509 Devices for Azure IoT Hub using .NET Core

This article shows how Azure device provisioning service can be used to setup an Azure IoT Hub and provision devices using X.509 certificates in an enrollment group. The certificates are created using the nuget package CertificateManager. By using this package, the X.509 certificates can be created in .NET Core and created on the fly as […]

Creating Certificates in .NET Core for Vue.js development using HTTPS

This article shows how to create development certificates for a Vue.js application, so that you can develop using HTTPS. The certificates are created using the CertificateManager nuget package. Code: CreateAngularVueJsDevelopmentCertificates A simple .NET Core console application is used to create the certificates. This type of application can run on most of the standard operating systems. […]

Requiring MFA for Admin Pages in an ASP.NET Core Identity application

This article shows how MFA could be forced on users to access sensitive pages within an ASP.NET Core Identity application. This could be useful for applications where different levels of access exist for the different identities. For example, users might be able to view the profile data using a password login, but an administrator would […]

Force ASP.NET Core OpenID Connect client to require MFA

This article shows how an ASP.NET Core Razor Page application which uses OpenID Connect to sign in, can require that users have authenticated using MFA (multi factor authentication). Code: Blogs in this series Force ASP.NET Core OpenID Connect client to require MFA Send MFA signin requirement to OpenID Connect server using ASP.NET Core Identity […]

WPF Azure AD signin with Sharepoint Online API call using Graph API

This article shows how a native WPF application could authenticate and authorize using an Azure Active Directory App Registration and then upload and download files in Sharepoint Online. The Graph API is used to access Sharepoint. Other Sharepoint libraries will NOT work if using an Azure AD signin. Code: Setup the Azure Active Directory […]

Securing a Web API using multiple token servers

This article shows how a single secure Web API could be used together with multiple secure token servers. The API uses JWT Bearer token authentication, but because the access token come from different token servers, the tokens validation need to be changed. Code: Using multiple Authorities with shared certitficate The first way this can […]

Using Azure Service Bus Topics in ASP.NET Core

This article shows how to implement two ASP.NET Core API applications to communicate with each other using Azure Service Bus Topics. This post continues on from the last article, this time using topics and subscriptions to communicate instead of a queue. By using a topic with subscriptions, and message can be sent to n receivers. […]