![]() ![]() Adding QR Codes to configure two-factor authentication ![]() Now, click OK again to create your web app. Select “Individual User Account” and click OK. A “Change Authentication” dialog box will open. Then, select the “Web application (Model-View-Controller)” template. Select “.NET Core” and “ASP.NET Core 2.0” from these drop-downs. You can see two drop-down menus at the top left of the template window. Name the project “TwoFactAuth” and press OK.Īfter clicking OK, a new dialog will open asking you to select the project template. Then, select “ASP.NET Core Web Application” from the available project types. NET Core inside the Visual C# menu from the left panel. After selecting the project, a “New Project” dialog will open. Open Visual Studio and select File > New > Project. Install the latest version of Visual Studio 2017 Community Edition from here.īefore proceeding, I would recommend that you get the source code from GitHub Create the MVC Web Application.The key generated in the app will be unique to your userID, and is a time-based one-time password (TOTP) - that is, it will expire after a certain time. When you login to the web application, you have to enter a six-digit pin that will be generated in the app to finish the two-factor authentication. To use it, you need to configure the Google Authenticator app on your smartphone using the QR code generated in the web app. I will have a look, if I can find the time to provide a PR, did not do that before, so if somebody is willing to help, i would be happy.In this article, we are going to learn how to perform two-factor authentication in an ASP.NET Core application using the Google Authenticator app. More easier might be to steal both devices, but then the attacker has a phone with minimum 4 digit pin or fingerprint to hack. In my opinion hacking phone and vpn-client device is much harder than only to hack the vpn-device alone (so totp on the phone increases security). Without plain totp the attacker must control both devices (totp-device vpn-device), hack or steel them to gain access. The default setup of the openvpn client allows storing the password locally, so we do not want to use a fixed password for openvpn dialin.Īlso in practice, many people tend to store pins/passwords unencrypted on the system so a fixed password or an additional pin (stored side by side with the tls cert) wolud not increase security. Here are our thoughts, why we would do it with plain totp: I would agree, generally the 4 digit pin + totp makes the system safer. Tl dr If someone submits a PR, we can consider it, but not unless it also comes with a hefty security warning against doing that. I still wouldn't trust it alone without a PIN. The odds of a brute force attempt guessing the same six digit code generated by the OTP process are low, though it is not impossible. In theory the OTP generated 6-digit codes are better than a static 6-digit password since they would be neigh impossible to brute force. Don't need to look at your phone every time. 6 digit TOTP is no stronger than a random 6 char pin. Pardon my lack of experience using openvpn, but would this request mean all someone needs is the username? TOTP really only protects against drag netting. The PIN makes that tougher since they'd need to have that as well and it isn't stored. If someone snagged a device with the VPN TLS key and/or cert and the OTP code generator, they could still get access since both are something you have. Part of the strength is that the OTP code is both something you know (your PIN) plus something you have (The OTP code/secret key). While the GA script allows omitting the PIN I don't see why you'd want to reduce the security in that way.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |