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local shortport = require "shortport"
local stdnse = require "stdnse"
local table = require "table"
local vnc = require "vnc"
description = [[
Queries a VNC server for its protocol version and supported security types.
]]
author = "Patrik Karlsson"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"default", "discovery", "safe"}
---
-- @output
-- PORT STATE SERVICE
-- 5900/tcp open vnc
-- | vnc-info:
-- | Protocol version: 3.889
-- | Security types:
-- | Mac OS X security type (30)
-- |_ Mac OS X security type (35)
--
-- Version 0.2
-- Created 07/07/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
-- Revised 08/14/2010 - v0.2 - changed so that errors are reported even without debugging
portrule = shortport.port_or_service( {5900, 5901, 5902} , "vnc", "tcp", "open")
action = function(host, port)
local vnc = vnc.VNC:new( host.ip, port.number )
local status, data
local result = {}
status, data = vnc:connect()
if ( not(status) ) then return " \n ERROR: " .. data end
status, data = vnc:handshake()
if ( not(status) ) then return " \n ERROR: " .. data end
status, data = vnc:getSecTypesAsStringTable()
if ( not(status) ) then return " \n ERROR: " .. data end
table.insert(result, ("Protocol version: %s"):format(vnc:getProtocolVersion()) )
if ( data and #data ~= 0 ) then
data.name = "Security types:"
table.insert( result, data )
end
if ( vnc:supportsSecType(vnc.sectypes.NONE) ) then
table.insert(result, "WARNING: Server does not require authentication")
end
return stdnse.format_output(status, result)
end