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46 lines
1.2 KiB
Lua
46 lines
1.2 KiB
Lua
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, 23 Jul 2009 23:15:57 GMT; -6s from local time.
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-- 80/tcp open http
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-- |_ http-date: Wed, 17 Jan 2007 09:29:10 GMT; -2y187d13h46m53s from local time.
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author = "David Fifield"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"discovery", "safe"}
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require("http")
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require("shortport")
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require("stdnse")
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portrule = shortport.port_or_service({80, 443, 631, 8080},
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{"http", "https", "ipp", "http-alt"})
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action = function(host, port)
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-- Get the local date in UTC.
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local request_date = os.date("!*t")
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local response = http.get(host, port, "/")
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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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-- Should account for estimated RTT too.
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local diff = stdnse.format_difftime(response_date, request_date)
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return string.format("%s; %s from local time.",
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response.header["date"], diff)
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end
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