Google Authenticator

'Google Play App -> https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=es

'Nuget Package -> https://www.nuget.org/packages/GoogleAuthenticator/

Imports Google.Authenticator

Imports System.Net

Imports System.IO

Function RegisterAppFromQrCode() As String

        Dim tfa As New TwoFactorAuthenticator()

        Dim setupInfo As SetupCode = tfa.GenerateSetupCode("AppName", "AppSubName", "SuperSecretKeyGoesHere", 300, 300)

        Dim qrCodeImageUrl As String = setupInfo.QrCodeSetupImageUrl

        Dim AppKey As String = setupInfo.ManualEntryKey

        Dim tClient As WebClient = New WebClient

        Dim URlImage As String = qrCodeImageUrl

        Dim tImage As Bitmap = Bitmap.FromStream(New MemoryStream(tClient.DownloadData(URlImage)))

        PictureBox1.Image = tImage '<- app="" code="" qr="" register="" span="" to="">

        Return AppKey '<- app="" for="" in="" key="" registered="" span="" validate="">

    End Function

    Function ValidateVerificationCode(VerificationCode As String) As Boolean

        Dim tfa As New TwoFactorAuthenticator()

        Dim isCorrectPIN As Boolean = False

        

        isCorrectPIN = tfa.ValidateTwoFactorPIN("SuperSecretKeyGoesHere", VerificationCode) '<- code="" from="" qr="" span="" verify="">

        

        Return isCorrectPIN

    End Function