22

✏️ Editing: bitcoin-info.nse

local os = require "os"
local datetime = require "datetime"
local bitcoin = require "bitcoin"
local shortport = require "shortport"
local stdnse = require "stdnse"

description = [[
Extracts version and node information from a Bitcoin server
]]

author = "Patrik Karlsson"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"discovery", "safe"}

--
-- Version 0.1
--
-- Created 11/09/2011 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
--

portrule = shortport.port_or_service(8333, "bitcoin", "tcp" )

local function fail(err) return stdnse.format_output(false, err) end

action = function(host, port)

local NETWORK = {
    [3652501241] = "main",
    [3669344250] = "testnet"
  }

local bcoin = bitcoin.Helper:new(host, port, { timeout = 10000 })
  local status = bcoin:connect()

if ( not(status) ) then
    return fail("Failed to connect to server")
  end

local request_time = os.time()
  local status, ver = bcoin:exchVersion()
  if ( not(status) ) then
    return fail("Failed to extract version information")
  end
  bcoin:close()
  datetime.record_skew(host, ver.timestamp, request_time)

local result = stdnse.output_table()
  result["Timestamp"] = datetime.format_timestamp(ver.timestamp)
  result["Network"] = NETWORK[ver.magic]
  result["Version"] = ver.ver
  result["Node Id"] = ver.nodeid
  result["Lastblock"] = ver.lastblock
  if ver.user_agent ~= "" then
    result["User Agent"] = ver.user_agent
  end

return result
end

MR SKB