Dan Fuhry <dan@enanocms.org> [Wed, 11 Jan 2017 13:02:34 +0000] rev 12
Tolerate up to 0.5Hz difference in OTP timestamps
I've received complaints of OTP validation failures during the trial rollout at Datto. I dumped a few OTPs along with the times of validation and found that the user's Yubikey was running its oscillator at 8.32Hz. This commit adds tolerance for up to 0.5Hz of variation to the OTP's timestamp field.