What type of applicationbuilder should I use in msal net im using asp net core

Introduction

When developing applications using ASP.NET, one that arises is which type of application builder to use in MSAL.NET when working with ASP.NET Core. In this article, we will explore the different options available and provide examples to help you make an informed decision.

Understanding MSAL.NET and ASP.NET Core

MSAL.NET (Microsoft Library) is a library that simplifies the process of integrating authentication and authorization into your applications. It provides a set of APIs and tools to handle authentication with various identity providers, including Azure Active Directory (AAD).

ASP.NET Core is a cross-platform, open-source framework for modern web applications. It provides a unified programming model for building web APIs, web applications, and microservices.

Application Builders in MSAL.NET

MSAL.NET provides two types of application builders for ASP.NET Core: ConfidentialClientApplicationBuilder and PublicClientApplicationBuilder. The between these two depends on the type of application you are building and the authentication requirements.

ConfidentialClientApplicationBuilder

The ConfidentialClientApplicationBuilder is used when building applications that -side authentication. This is typically used for web applications where the authentication process happens on the server side.

Here is an example of using ConfidentialClientApplicationBuilder in ASP.NET Core:


ConfidentialClientApplicationBuilder builder = ConfidentialClientApplicationBuilder
    .Create(clientId)
    .WithClientSecret(clientSecret)
    .WithAuthority();

In this example, we create an instance of ConfidentialClientApplicationBuilder and configure it with the necessary parameters such as the client ID, client secret, and authority.

PublicClientApplicationBuilder

The PublicClientApplicationBuilder is used when building applications that require client-side authentication. This is typically used for single-page applications (SPAs) or mobile applications where the authentication process happens on the client side.

Here is an example of using PublicClientApplicationBuilder in ASP.NET Core:


PublicClientApplicationBuilder builder = PublicClientApplicationBuilder
    .Create(clientId)
    .WithAuthority(authority);

In this example, we create an instance of PublicClientApplicationBuilder and configure it with the necessary parameters such as the client ID and authority.

Choosing the Application Builder

When deciding which application builder to use in MSAL.NET for ASP.NET Core, consider the following:

  • If your application requires server-side authentication, use ConfidentialClientApplicationBuilder.
  • If your application requires client-side authentication, use PublicClientApplicationBuilder.

By choosing the appropriate application builder, you can ensure that your application's authentication process aligns with its requirements.

Conclusion

In this article, we explored the different types of application builders available in MSAL.NET for ASP.NET Core. We discussed the ConfidentialClientApplicationBuilder for server-side authentication and the PublicClientApplicationBuilder for client-side authentication. By understanding the differences and choosing the right application builder, you can effectively authentication into your ASP.NET Core applications.

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