59 lines
1.7 KiB
Plaintext
59 lines
1.7 KiB
Plaintext
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local datetime = require "datetime"
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local http = require "http"
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local os = require "os"
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local shortport = require "shortport"
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local stdnse = require "stdnse"
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local string = require "string"
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local datetime = require "datetime"
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description = [[
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Gets the date from HTTP-like services. Also prints how much the date
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differs from local time. Local time is the time the HTTP request was
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sent, so the difference includes at least the duration of one RTT.
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]]
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---
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-- @output
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-- 80/tcp open http
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-- |_http-date: Thu, 02 Aug 2012 22:11:03 GMT; 0s from local time.
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-- 80/tcp open http
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-- |_http-date: Thu, 02 Aug 2012 22:07:12 GMT; -3m51s from local time.
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--
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-- @xmloutput
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-- <elem key="date">2012-08-02T23:07:12+00:00</elem>
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-- <elem key="delta">-231</elem>
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author = "David Fifield"
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license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
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categories = {"discovery", "safe"}
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portrule = shortport.http
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action = function(host, port)
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local response = http.get(host, port, "/")
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local request_time = os.time()
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if not response.status or not response.header["date"] then
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return
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end
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local response_date = http.parse_date(response.header["date"])
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if not response_date then
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return
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end
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local response_time = datetime.date_to_timestamp(response_date)
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local output_tab = stdnse.output_table()
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output_tab.date = datetime.format_timestamp(response_time, 0)
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output_tab.delta = os.difftime(response_time, request_time)
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datetime.record_skew(host, response_time, request_time)
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local output_str = string.format("%s; %s from local time.",
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response.header["date"], datetime.format_difftime(os.date("!*t", response_time), os.date("!*t", request_time)))
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return output_tab, output_str
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end
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