equal
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352 { |
352 { |
353 $expect_delta = time() - $access_time; |
353 $expect_delta = time() - $access_time; |
354 // Tolerate up to a 0.5Hz deviance from 8Hz. I've observed Yubikey |
354 // Tolerate up to a 0.5Hz deviance from 8Hz. I've observed Yubikey |
355 // clocks running at 8.32Hz |
355 // clocks running at 8.32Hz |
356 $actual_delta = $otp['timestamp'] - $token_time; |
356 $actual_delta = $otp['timestamp'] - $token_time; |
357 $fuzz = 150 + round(($actual_delta / 7.5) - ($actual_delta / 8.5)); |
357 $fuzz = 150 + round(($actual_delta / 7.75) - ($actual_delta / 8.25)); |
358 // Now that we've calculated fuzz, convert the actual delta to quasi-seconds |
358 // Now that we've calculated fuzz, convert the actual delta to quasi-seconds |
359 $actual_delta /= 8; |
359 $actual_delta /= 8; |
360 if ( !yms_within($expect_delta, $actual_delta, $fuzz) ) |
360 if ( !yms_within($expect_delta, $actual_delta, $fuzz) ) |
361 { |
361 { |
362 // if we have a likely wraparound, just pass it |
362 // if we have a likely wraparound, just pass it |