Craft 3 plugin for two-factor or two-step login using Time Based OTP (TOTP, like Google Authenticator). Every user can setup TOTP themselves, the plugin does not force users. Admins can list usage in user tables.

Login works as usual for users without 2-factor auth.

When enabled, the user is redirected to the 2-factor verification page after login. This means the user is already logged in. When the user tries to visit an other Control Panel page than the public ones before verification, the logout is triggered. This blocks the user from visiting the CP unverified.

• Craft 3.0.0
• PHP 7.x at least
• userSessionDuration in the general.php config should be larger than 0 (by default)

When using a login for front end users, the following steps add 2FA support.

• Copy the two-factor-authentication.php file to your config/ folder.
• Set verifyFrontEnd to true in the config file.
• Define what urls should be protected with 2FA verification. Choose between using the frontEndPathWhitelist or frontEndPathBlacklist! Using both will block everything! See config for additional info.
• Build a 2FA login-verify form accessible by url like the example twig.
• Set the verifyPath. For our login-verify.twig example the path would be login-verify.
• Allow users setting up 2FA in front end by building a template like the example twig.
• Set the settingsPath. For our two-factor-settings.twig example the path would be two-factor-settings.

Copy the two-factor-authentication.php file to your config/ folder.

Simply remove the user's twofactorauthentication_user record. This disables 2FA for that user.

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