ASP.NET Authentication: Overview

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.NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications. The base platform provides components that apply to all different types of apps. Additional frameworks, such as ASP.NET, extend .NET with components for building specific types of apps.

ASP.NET is an open source web framework, created by Microsoft, for building modern web apps and services with .NET. ASP.NET is cross platform and runs on Windows, Linux, macOS, and Docker. The server-side web application framework ASP.NET, also known as Active Server Pages Network Enabled Technologies, is free to use. It is intended for use in web development to create interactive websites, programs, and services. Let’s take a closer look at ASP.Net Authentication.

What Is ASP.NET Authentication?

Microsoft’s ASP.NET is an open source framework for creating contemporary web sites, services, and applications. It is supported by Linux, macOS, Windows, and Docker. IAuthenticationService is the foundation of the ASP.NET authentication framework. The service can authenticate users in ASP.NET applications thanks to registered authentication handlers.

ASP.NET Authentication Concepts

Authentication Schemes

A scheme for authentication identifies the authentication handler in charge of generating the appropriate set of claims. The names of authentication handlers and the particular configuration settings for each handler’s instance are known as authentication schemes. Schemes can be used to discuss authentication and challenge or forbid associated handler behavior.

Authentication Handler

The actions of an authentication scheme are carried out by authentication handlers. From AuthenticationHandler <TOptions> or IAuthenticationHandler, handlers can be derived. Authenticating users is its main objective. The associated authentication scheme’s configuration and the context of incoming requests will influence how the authentication handler responds.

The handler creates an AuthenticationTicket object, which represents a user’s identity, if the authentication is successful. A “failure” or “no result” is returned if the authentication fails. The handler offers ways to thwart or oppose actions taken by a user. Unauthorized users will be denied access, while unauthenticated users will be presented with a challenge.

Authentication Challenge

When unauthenticated users try to access a resource that needs authentication, the authorization system takes an additional precaution known as authentication challenges. For instance, if an anonymous user clicks on a login link or requests access to a restricted resource, the IAuthenticationService may issue a challenge. The challenge is issued by the authorization system using a default authentication scheme (or a specified scheme if one exists).

Forbid Action

If authenticated users attempt to access resources without the required permissions, the authorization system triggers the ‘forbid’ action for authentication schemes. Users are informed by forbidden actions when they have been authenticated but are denied access to a resource. The following situations, for instance, may result in the system forbidding authentication:

  • An access-restricted page is redirected to by a cookie authentication scheme.
  • A 403 (forbidden) error is returned by a JWT bearer scheme.
  • A page where users can request access to a protected resource is the destination of an authentication scheme.

ASP.NET Core Identity

An API that supports UI login features is called Core Identity. You can manage a variety of user data elements with it, such as user profiles, passwords, roles, tokens, and claims. Users can create accounts using the login information from ASP.NET Core Identity. A supported external login provider, such as Google, Facebook, Twitter, or Microsoft accounts, can also be used to create accounts.

The SQL Server database that houses usernames, profile information, and passwords is typically used to configure Identity. A different persistent store, like Azure Table Storage, is also an option.

Providers of authentication for each tenant

There is no integrated method for multi-tenant authentication in ASP.NET Core. We advise customers to think about Orchard Core or ABP Framework for multi-tenant authentication even though they are able to create one using the built-in features.

Orchard Core is an ASP.NET Core-based multi-tenant, open-source, and modular app framework and an app framework with a content management system (CMS) added on top. ABP Framework supports various architectural patterns including modularity, microservices, domain driven design, and multi-tenancy. See ABP Framework source on GitHub.

ASP.NET Multi-Factor Authentication

During a sign-in event, multi-factor authentication (MFA) asks the user for multiple forms of identification. Passwords are frequently used as the first identification factor, and a fingerprint scan, a FIDO2 key, or a verification code sent to the user’s phone can be used as the second factor. Adding MFA as a requirement for an application greatly increases the security of authentication.

Using ASP.NET Core Identity offers native support for 2FA (2-factor authentication). Set the IdentityUserTKey> to enable or disable 2FA for a specific user. Property TwoFactorEnabled. When utilizing ASP.NET Core Identity, cMFA with the Time-based One-Time Password (TOTP) algorithm is additionally natively supported. This approach is compatible with authenticator programs like the Google Authenticator and the Microsoft Authenticator.

Users accessing sensitive pages in an ASP.NET Core Identity application can be forced to use MFA. This is beneficial for programs with various levels of access for various identities. Users can log in using their password, for instance, to view profile information, but administrators need MFA to access admin pages.

Wrapping Up

Finding a user’s identity is the first step in user authentication. We take this action to make sure they are who they claim to be. Once we are confident in our ability to trust them, we can log them into our app and give them access to resources that are intended for logged-in users only. Now that you know how to authenticate and log in a user to an ASP.NET application, hopefully you are off to a good start.

NODE.JS VS ASP.NET CORE: Which One to Choose?

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The software industry offers multiple choices for developers and business owners. Some languages come and go forever, and some make a toll in the industry and immediately gain popularity, such as ASP.NET Core and Node.js. These are the two most popular software development environments with strong community support that help the skilled .NET Core developers in speeding up, fastening, and scaling up the entire development process. Before choosing any programming language let us know more about these two programming platforms and see what they have to offer.

The Basics

Node.js

As an alternative to Apache HTTP Server, Node.js was created for Apple’s, SmartOS, FreeBSD, AIX, Microsoft Windows, Android, and Linux operating systems. As the official site explains Node.js is a software platform built on the basis of V8, where V8, in turn, is the JavaScript engine developed by Google with open source code written in C++.

In this modern age, JavaScript has become the most interesting trend. Companies are migrating their sites to JavaScript-based technologies. Nodejs is a cross-platform runtime environment that connects libraries written in different programming languages and also enables interaction with I/O devices. Developers can use Node.js in web development by utilizing an agile software development approach. It offers both scalable and robust services to clients.

ASP .NET Core

ASP.NET Core is one of the most important open-source web application frameworks. It is developed and designed by Microsoft. It is a framework created on CLR (Common Language Runtime) that enables the developers to use any .NET dialect like C# (object-oriented), VB .NET (a bequest of Visual Essential), F# (utilitarian to begin with), C++, and more.

The .NET Core framework offers a wide range of web forms MVC and uses HTML5, JavaScript, CSS, and Templates which are used to create different types of services and applications for Windows. But ASP.NET Core is used to create dynamic web pages and it is a part of the .NET Core framework.

Performance

Node.js

When it comes to the performance of Node.js, many developers in the market believe that applications created using Node.js offer better performance. This technology is capable of handling multitasking with ease and this is because it works on JavaScript engine V8, the high-performing engine. Besides this, it can also tackle more traffic on the server.

.NET Core

In comparison to Node.js performance, ASP.NET Core only proves its robustness for a certain type of project. Node.js can manage tasks that require less computation. But with time .NET Core has become 15% faster and this has made it a good choice for developers.

Stability & Reliability

ASP.NET Core/.NET Core is a winner in this category. The security and reliability the platform provides make it a great option to create robust software with C# language. Node.js is more reliable for complex enterprise software developed with TypeScript than on its own.

Node.js is a technology that is known as a full-stack JavaScript framework that serves both the server-side and client-side of the applications. This technology can interpret the JavaScript code with the help of the JavaScript v8 engine by Google. And it complies with the JS code into the machine code directly without any issues. This approach enables faster and better implementation of code and also the code execution is also enhanced by the JavaScript runtime environment.

On the other hand, one of the most important advantages of the .NET Core is to offer high performance and optimize the code to offer better results. ASP.NET Core is a technology that demands less coding and this helps the developers to easily optimize the code. And because of this, the development team has to spend less time creating a solution and this helps in cutting down the budget.

Community Support

Both development environments can boast of having active and strong community support which ultimately means it won’t be burdensome to find a solution to the problem. However, keep in mind that .NET has more community support on Stack Overflow whereas Node.js is supported more via GitHub. The best example is the Stack Overflow question and answer website which has around 4 million registered users.

The community support for .NET Core appears to be rising as well. Every day, the official Dotnet YouTube channel posts useful videos that engage the community in a good way.

How to make the right decision?

Node.js is one of the most popular JavaScript-based platforms that is designed to increase the use of JS in creating efficient and scalable network applications, and the ASP.NET core is a platform that enables the use of different libraries, programming languages, and editors to create websites, web apps, and mobile apps. There are such sites as Microsoft, StackOverflow, and Dell that run on a .NET environment. Again developers can use Node.js for creating web applications and APIs for various operating systems like Windows, Linux, and OS X. Besides, using this technology you can create apps for big companies like Uber, PayPal, LinkedIn, Netflix, eBay, and more. If you know the type of app or software you want to develop it will be easier for you to choose the solution.

Conclusion

When it comes to choosing a technology out of these two modern platforms, ASP.NET Core is a web application development technology that can be more suitable for small and medium-size solutions. While on the other Node.js is used when the developers want to create a robust solution for the clients which is also lightweight. This proves that the selection depends on the project type, size, and the need for the functionalities in that project.

Error CS0016: Could not write to output file

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If you attempt to run an ASP.NET application hosted on IIS running on Windows Home Basic or Premium, you may receive the following error:

error CS0016: Could not write to output file ‘c:WindowsMicrosoft.NETFramework…

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Run ASP.NET and IIS on Windows Vista and 7 Home Premium

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If you attempt to run an ASP.NET application hosted on IIS7.0 running on Windows Home Basic or Premium (Vista or Windows 7, x86 or x64), you may receive the following error:

error CS0016: Could not write to output file ‘c:WindowsMicrosoft.NETFramework64v2.0.50727Temporary ASP.NET Files…

Apparently this problem occurs because Windows Home Basic and Premium lack Windows Authentication.  So the common response on the Web is to upgrade to Windows Home Ultimate, Business or Professional.  However, there is no need to upgrade, as you can solve this problem with a few mouse clicks:

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