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Add clock-skew script, datetime library

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dmiller
2016-07-21 17:05:25 +00:00
parent 963011520f
commit 5b7a07b6c9
15 changed files with 128 additions and 5 deletions
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5
scripts/rfc868-time.nse
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@@ -1,4 +1,5 @@
local comm = require "comm"
local datetime = require "datetime"
local shortport = require "shortport"
local stdnse = require "stdnse"
local bin = require "bin"
@@ -46,12 +47,14 @@ action = function(host, port)
-- Make sure we don't stomp a more-likely service detection.
if port.version.name == "time" then
local diff = os.difftime(stamp,os.time())
local recvtime = os.time()
local diff = os.difftime(stamp,recvtime)
if diff < 0 then diff = -diff end
-- confidence decreases by 1 for each year the time is off.
stdnse.debug1("Time difference: %d seconds (%0.2f years)", diff, diff / 31556926)
local confidence = 10 - diff / 31556926
if confidence < 0 then confidence = 0 end
datetime.record_skew(host, stamp, recvtime)
port.version.name_confidence = confidence
nmap.set_port_version(host, port, "hardmatched")
end