Tag Archives: Azure AD

Securing OAuth Bearer tokens from multiple Identity Providers in an ASP.NET Core API

This article shows how to secure and use different APIs in an ASP.NET Core API which support OAuth access tokens from multiple identity providers. Access tokens from Azure AD and from Auth0 can be be used to access data from the service. Each API only supports a specific token from the specific identity provider. Microsoft.Identity.Web […]

Securing Blazor Web assembly using cookies

The article shows how a Blazor web assembly UI hosted in an ASP.NET Core application can be secured using cookies. Azure AD is used as the identity provider and the Microsoft.Identity.Web Nuget package is used to secure the trusted server rendered application. The API calls are protected using the secure cookie and anti-forgery tokens to […]

Using Azure AD groups authorization in ASP.NET Core for an Azure Blob Storage

This post show how Azure AD groups could be used to implement authorization for an Azure Blob storage and used in an ASP.NET Core Razor page application to authorize the identities. The groups are assigned the roles in the Azure Storage. Azure AD users are added to the Azure AD groups and inherit the group […]

Secure Azure AD User File Upload with Azure AD Storage and ASP.NET Core

This post shows how files can be uploaded to Azure blob storage using ASP.NET Core in a secure way using OAuth and Open ID Connect. Azure AD is used to authenticate the users. The uploaded file descriptions are saved to an SQL database using EF Core so that listing or searching files can be implemented […]

Implement app roles authorization with Azure AD and ASP.NET Core

This post shows how to implement Azure AD App roles and applied to users or groups in Azure AD. The roles are used in an ASP.NET Core Razor page application as well as a ASP.NET Core API. The roles from the access token and the id token are used to authorize the identity which is […]

Implement OAUTH Device Code Flow with Azure AD and ASP.NET Core

The post shows how the Device Code flow (RFC 8628) could be implemented in an ASP.NET Core web application which uses Azure AD as an identity provider. An Azure App registration is used to setup the client. This solution would be useful for input constrained devices which have a browser and need to authenticate identities. […]

Protecting legacy APIs with an ASP.NET Core Yarp reverse proxy and Azure AD OAuth

This article shows how a legacy API could be protected using an ASP.NET Core Yarp reverse proxy and Azure AD OAuth. The security is implemented using Azure AD and Microsoft.Identity.Web. Sometimes it is not possible to update an existing or old API within a reasonable price and the financially best way to use it in […]

Using multiple APIs in Angular and ASP.NET Core with Azure AD authentication

This article shows how an Angular application could be used to access many APIs in a secure way. An API is created specifically for the Angular UI and the further APIs can only be access from the trusted backend which is under our control. Code: https://github.com/damienbod/AzureADAuthRazorUiServiceApiCertificate Posts in this series Implement Azure AD Client credentials […]

Using encrypted access tokens in Azure with Microsoft.Identity.Web and Azure App registrations

This post shows how to use encrypted access tokens with Azure AD App registrations using Microsoft.Identity.Web. By using encrypted access tokens, only applications with access to the private key can decrypt the tokens. When using encrypted tokens, you can prevent access tokens data being used or read by such tools as https://jwt.ms or https://jwt.io and […]

Securing Azure Functions using Azure AD JWT Bearer token authentication for user access tokens

This post shows how to implement OAuth security for an Azure Function using user-access JWT Bearer tokens created using Azure AD and App registrations. A client web application implemented in ASP.NET Core is used to authenticate and the access token created for the identity is used to access the API implemented using Azure Functions. Microsoft.Identity.Web […]