54 lines
1.5 KiB
Lua
54 lines
1.5 KiB
Lua
local imap = require "imap"
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local shortport = require "shortport"
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local stdnse = require "stdnse"
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local table = require "table"
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description = [[
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Retrieves IMAP email server capabilities.
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IMAP4rev1 capabilities are defined in RFC 3501. The CAPABILITY command
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allows a client to ask a server what commands it supports and possibly
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any site-specific policy.
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]]
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---
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-- @output
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-- 143/tcp open imap
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-- |_ imap-capabilities: LOGINDISABLED IDLE IMAP4 LITERAL+ STARTTLS NAMESPACE IMAP4rev1
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author = "Brandon Enright"
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license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
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categories = {"default", "safe"}
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portrule = shortport.port_or_service({143, 993}, {"imap", "imaps"})
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local function fail (err) return stdnse.format_output(false, err) end
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action = function(host, port)
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local helper = imap.Helper:new(host, port)
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local status = helper:connect()
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if ( not(status) ) then return fail("Failed to connect to server") end
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local status, capa = helper:capabilities(host, port)
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if( not(status) ) then return fail("Failed to retrieve capabilities") end
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helper:close()
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if type(capa) == "table" then
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-- Convert the capabilities table into an array of strings.
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local capstrings = {}
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local cap, args
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for cap, args in pairs(capa) do
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table.insert(capstrings, cap)
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end
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return table.concat(capstrings, " ")
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elseif type(capa) == "string" then
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stdnse.debug1("'%s' for %s", capa, host.ip)
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return
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else
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return "server doesn't support CAPABILITIES"
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end
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end
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