The correctly formatted URL for the QR Code is available in the: The HTML contains a qrCode element into which you can place a QR Code by whatever mechanism your library provides. You can replace the QR Code library with your preferred library. It can be changed to any value, but it must always be URL encoded. The second parameter in the call to string.Format is your site name, taken from your solution name. The default code from the template looks as follows: private string GenerateQrCodeUri(string email, string unformattedKey) You can change it by looking for the GenerateQrCodeUri(string email, string unformattedKey) method in the /Areas/Identity/Pages/Account/Manage/. The site name in the QR Code is taken from the project name you choose when initially creating your project. Run your app and ensure that you can scan the QR code and validate the code the authenticator proves. Delete the paragraph which links you to these instructions.Add the qr.js file with the call to generate the QR Scripts Html.PartialAsync("_ValidationScriptsPartial").Update the Scripts section to add a reference to the qrcode.js library previously downloaded.New QRCode(document.getElementById("qrCode"), Create a new JavaScript file called qr.js in.In /Areas/Identity/Pages/Account/Manage/EnableAuthenticator.cshtml, locate the Scripts section at the end of the Scripts Html.PartialAsync("_ValidationScriptsPartial").Follow the instructions in Scaffold Identity to generate /Areas/Identity/Pages/Account/Manage/EnableAuthenticator.cshtml.Download the qrcode.js javascript library to the wwwroot\lib folder in your project.These instructions use qrcode.js from the repo. Adding QR Codes to the 2FA configuration page If the default templates enforced "local" 2FA then users would be required to satisfy two 2FA approaches, which is not a commonly used scenario. Consider, for example, the Microsoft authentication provider requires a hardware key or another 2FA approach. External logins are protected by whatever mechanism the external login provider provides. Two factor authentication does not happen using an external authentication provider, such as Google or Facebook. This document will guide you through adding QR Code generation to the 2FA configuration page. The ASP.NET Core web app templates support authenticators, but don't provide support for QRCode generation. ![]() ![]() Typically an authenticator app is installed on a smart phone. ![]() An authenticator app provides a 6 to 8 digit code which users must enter after confirming their username and password. Two factor authentication (2FA) authenticator apps, using a Time-based One-time Password Algorithm (TOTP), are the industry recommended approach for 2FA. ASP.NET Core ships with support for authenticator applications for individual authentication.
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