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local stdnse = require "stdnse"
local table = require "table"
local target = require "target"
local bittorrent = stdnse.silent_require "bittorrent"
description = [[
Discovers bittorrent peers sharing a file based on a user-supplied
torrent file or magnet link. Peers implement the Bittorrent protocol
and share the torrent, whereas the nodes (only shown if the
include-nodes NSE argument is given) implement the DHT protocol and
are used to track the peers. The sets of peers and nodes are not the
same, but they usually intersect.
If the <code>newtargets</code> script-arg is supplied it adds the discovered
peers as targets.
]]
---
-- @usage
-- nmap --script bittorrent-discovery --script-args newtargets,bittorrent-discovery.torrent=<torrent_file>
--
-- @args bittorrent-discovery.torrent a string containing the filename of the torrent file
-- @args bittorrent-discovery.magnet a string containing the magnet link of the torrent
-- @args bittorrent-discover.timeout desired (not actual) timeout for the DHT discovery (default = 30s)
-- @args bittorrent-discover.include-nodes boolean selecting whether to show only nodes
--
-- @output
-- | bittorrent-peers:
-- | Peers:
-- | 97.88.178.168
-- | 89.100.184.36
-- | 86.185.55.212
-- | Total of 3 peers discovered
-- | Nodes:
-- | 68.103.0.189
-- | 67.164.32.71
-- | 24.121.13.69
-- | 207.112.100.224
-- | Total of 4 nodes discovered
-- |_ Use the newtargets script-arg to add the results as targets
--
author = "Gorjan Petrovski"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"discovery","safe"}
prerule = function()
if not stdnse.get_script_args(SCRIPT_NAME..".torrent") and
not stdnse.get_script_args(SCRIPT_NAME..".magnet") then
stdnse.debug3("Skipping '%s' %s, No magnet link or torrent file arguments.", SCRIPT_NAME, SCRIPT_TYPE)
return false
end
return true
end
action = function()
local timeout = stdnse.parse_timespec(stdnse.get_script_args(SCRIPT_NAME..".timeout"))
local filename = stdnse.get_script_args(SCRIPT_NAME..".torrent")
local magnet = stdnse.get_script_args(SCRIPT_NAME..".magnet")
local include_nodes = stdnse.get_script_args(SCRIPT_NAME..".include-nodes")
local t = bittorrent.Torrent:new()
if filename then
t:load_from_file(filename)
elseif magnet then
t:load_from_magnet(magnet)
end
t:trackers_peers()
t:dht_peers(timeout)
local output = {}
local peers = {}
peers.name = "Peers:"
local nodes = {}
nodes.name = "Nodes:"
-- add peers
if target.ALLOW_NEW_TARGETS then
for peer_ip in pairs(t.peers) do
target.add(peer_ip)
table.insert(peers, peer_ip)
end
if #peers>0 then
table.insert(peers, "Total of "..#peers.." peers discovered")
end
else
for peer_ip in pairs(t.peers) do
table.insert(peers, peer_ip)
end
if #peers>0 then
table.insert(peers, "Total of "..#peers.." peers discovered")
end
end
-- add nodes
if target.ALLOW_NEW_TARGETS and include_nodes then
for node_ip in pairs(t.nodes) do
target.add(node_ip)
table.insert(nodes, node_ip)
end
if #nodes >0 then
table.insert(nodes, "Total of "..#nodes.." nodes discovered")
end
elseif include_nodes then
for node_ip in pairs(t.nodes) do
table.insert(nodes, node_ip)
end
if #nodes >0 then
table.insert(nodes, "Total of "..#nodes.." nodes discovered")
end
end
local print_out = false
if #peers > 0 then
table.insert(output, peers)
print_out = true
end
if include_nodes and #nodes > 0 then
table.insert(output, nodes)
print_out = true
end
if print_out and not target.ALLOW_NEW_TARGETS then
table.insert(output,"Use the newtargets script-arg to add the results as targets")
end
return stdnse.format_output( print_out , output)
end
|
