Google Authenticator does not work with example app.

[ghedsouza]

Steps:

1. Go to http://example-two-factor-auth.herokuapp.com/
2. Follow steps under "next steps", and choose "Token generator" in step 3.
3. Use "Google Authenticator" app with the ZXing barcode scanner to scan the QR code.

Results:
An error stating "Please enter a valid token." when I try entering the code (eg. 707923) shown in my Google Authenticator app.

Notes:
Test account info:
username: vectortest
password: a

In Google Authenticator, I see "vectortest@example-two-factor.auth.herokuapp.com" as the account id.

[Bouke]

Hi @ghedsouza, sorry to hear that it doesn't work for you. I was not able to replicate this issue with Google Authenticator on my iPhone. From your step 3 it appears as if you're not using an iPhone. What device are you using? What is ZXing barcode scanner? Doesn't Google Authenticator come with a barcode scanner built-in on your device? Does that set-up work for you on other websites with two-factor authentication and bar-code scanning?

[ghedsouza]

@Bouke I'm using a Nexus 4. ZXing is the QR scanner application that is recommended by Google Authenticator if you do not already have one installed.

I haven't tried two-factor authentication on other sites, but that is a good idea.

[ghedsouza]

The problem was that my phone's time was not accurate. I followed the instructions at (https://support.google.com/accounts/answer/185834?hl=en#sync) to independently sync the Google Authenticator app's time with Google's time server, and now the tokens work. Thanks.