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local informix = require "informix"
local nmap = require "nmap"
local shortport = require "shortport"
local stdnse = require "stdnse"
local table = require "table"

description = [[
Runs a query against IBM Informix Dynamic Server using the given
authentication credentials (see also: informix-brute).
]]

---
-- @usage
-- nmap -p 9088 <host> --script informix-query --script-args informix-query.username=informix,informix-query.password=informix
--
-- @output
-- PORT     STATE SERVICE
-- 9088/tcp open  unknown syn-ack
-- | informix-query:
-- |   Information
-- |     User: informix
-- |     Database: sysmaster
-- |     Query: "SELECT FIRST 1 DBINFO('dbhostname') hostname, DBINFO('version','full') version FROM systables"
-- |   Results
-- |     hostname      version
-- |_    patrik-laptop IBM Informix Dynamic Server Version 11.50.UC4E
--
-- @args informix-query.username The username used for authentication
-- @args informix-query.password The password used for authentication
-- @args informix-query.database The name of the database to connect to
--       (default: sysmaster)
-- @args informix-query.query The query to run against the server
--       (default: returns hostname and version)
-- @args informix-query.instance The name of the instance to connect to

-- Version 0.1

-- Created 07/28/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>

author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"intrusive", "auth"}
dependencies = { "informix-brute" }


portrule = shortport.port_or_service( { 1526, 9088, 9090, 9092 }, "informix", "tcp", "open")

action = function( host, port )
  local instance = stdnse.get_script_args('informix-info.instance')
  local helper
  local status, data
  local result = {}
  local user = stdnse.get_script_args('informix-query.username')
  local pass = stdnse.get_script_args('informix-query.password')
  local query = stdnse.get_script_args('informix-query.query')
  local db = stdnse.get_script_args('informix-query.database') or "sysmaster"

  query = query or "SELECT FIRST 1 DBINFO('dbhostname') hostname, " ..
    "DBINFO('version','full') version FROM systables"

  helper = informix.Helper:new( host, port, instance )

  -- If no user was specified lookup the first user in the registry saved by
  -- the informix-brute script
  if ( not(user) ) then
    if ( nmap.registry['informix-brute'] and nmap.registry['informix-brute'][1]["username"] ) then
      user = nmap.registry['informix-brute'][1]["username"]
      pass = nmap.registry['informix-brute'][1]["password"]
    else
      return stdnse.format_output(false, "No credentials specified (see informix-table.username and informix-table.password)")
    end
  end

  status, data = helper:Connect()
  if ( not(status) ) then
    return stdnse.format_output(status, data)
  end

  status, data = helper:Login(user, pass, nil, db)
  if ( not(status) ) then return stdnse.format_output(status, data) end

  status, data = helper:Query(query)
  if ( not(status) ) then return stdnse.format_output(status, data) end

  for _, rs in ipairs(data) do
    table.insert( result, { "User: " .. user, "Database: " .. db, ( "Query: \"%s\"" ):format( rs.query ), name="Information" } )
    local tmp = informix.Util.formatTable( rs )
    tmp.name = "Results"
    table.insert(  result, tmp  )
  end


  return stdnse.format_output(status, result)
end