In users have not created backup codes yet the app is not enabled for that user
and therefore we got an undefined index error because the code assumed it was
always there. It now properly returns null.
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
* try to reuse the old session token for remember me login
* decrypt/encrypt token password and set the session id accordingly
* create remember-me cookies only if checkbox is checked and 2fa solved
* adjust db token cleanup to store remembered tokens longer
* adjust unit tests
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
This fixes infinite loops that are caused whenever a user is about to solve a 2FA
challenge, but the provider app is disabled at the same time. Since the session
value usually indicates that the challenge needs to be solved before we grant access
we have to remove that value instead in this special case.
