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local http = require "http"
local io = require "io"
local ipOps = require "ipOps"
local json = require "json"
local nmap = require "nmap"
local stdnse = require "stdnse"
local string = require "string"
local tab = require "tab"
local table = require "table"
local openssl = stdnse.silent_require "openssl"
-- Set your Shodan API key here to avoid typing it in every time:
local apiKey = ""
author = "Glenn Wilkinson <glenn@sensepost.com> (idea: Charl van der Walt <charl@sensepost.com>)"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
categories = {"discovery", "safe", "external"}
description = [[
Queries Shodan API for given targets and produces similar output to
a -sV nmap scan. The ShodanAPI key can be set with the 'apikey' script
argument, or hardcoded in the .nse file itself. You can get a free key from
https://developer.shodan.io
N.B if you want this script to run completely passively make sure to
include the -sn -Pn -n flags.
]]
---
-- @usage
-- nmap --script shodan-api x.y.z.0/24 -sn -Pn -n --script-args 'shodan-api.outfile=potato.csv,shodan-api.apikey=SHODANAPIKEY'
-- nmap --script shodan-api --script-args 'shodan-api.target=x.y.z.a,shodan-api.apikey=SHODANAPIKEY'
--
-- @output
-- | shodan-api: Report for 2600:3c01::f03c:91ff:fe18:bb2f (scanme.nmap.org)
-- | PORT PROTO PRODUCT VERSION
-- | 80 tcp Apache httpd
-- | 3306 tcp MySQL 5.5.40-0+wheezy1
-- | 22 tcp OpenSSH 6.0p1 Debian 4+deb7u2
-- |_443 tcp
--
--@args shodan-api.outfile Write the results to the specified CSV file
--@args shodan-api.apikey Specify the ShodanAPI key. This can also be hardcoded in the nse file.
--@args shodan-api.target Specify a single target to be scanned.
--
--@xmloutput
-- <table key="hostnames">
-- <elem>scanme.nmap.org</elem>
-- </table>
-- <table key="ports">
-- <table>
-- <elem key="protocol">tcp</elem>
-- <elem key="number">22</elem>
-- </table>
-- <table>
-- <elem key="version">2.4.7</elem>
-- <elem key="product">Apache httpd</elem>
-- <elem key="protocol">tcp</elem>
-- <elem key="number">80</elem>
-- </table>
-- </table>
-- ToDo: * Have an option to complement non-banner scans with shodan data (e.g. -sS scan, but
-- grab service info from Shodan
-- * Have script arg to include extra host info. e.g. Coutry/city of IP, datetime of
-- scan, verbose port output (e.g. smb share info)
-- * Warn user if they haven't set -sn -Pn and -n (and will therefore actually scan the host
-- * Accept IP ranges via the script argument 'target' parameter
-- Begin
if not nmap.registry[SCRIPT_NAME] then
nmap.registry[SCRIPT_NAME] = {
apiKey = stdnse.get_script_args(SCRIPT_NAME .. ".apikey") or apiKey,
count = 0
}
end
local registry = nmap.registry[SCRIPT_NAME]
local outFile = stdnse.get_script_args(SCRIPT_NAME .. ".outfile")
local arg_target = stdnse.get_script_args(SCRIPT_NAME .. ".target")
local function lookup_target (target)
local response = http.get("api.shodan.io", 443, "/shodan/host/".. target .."?key=" .. registry.apiKey, {any_af = true})
if response.status == 404 then
stdnse.debug1("Host not found: %s", target)
return nil
elseif (response.status ~= 200) then
stdnse.debug1("Bad response from Shodan for IP %s : %s", target, response.status)
return nil
end
local stat, resp = json.parse(response.body)
if not stat then
stdnse.debug1("Error parsing Shodan response: %s", resp)
return nil
end
return resp
end
local function format_output(resp)
if resp.error then
return resp.error
end
if resp.data then
registry.count = registry.count + 1
local out = { hostnames = resp.hostnames, ports = {} }
local ports = out.ports
local tab_out = tab.new()
tab.addrow(tab_out, "PORT", "PROTO", "PRODUCT", "VERSION")
for key, e in ipairs(resp.data) do
ports[#ports+1] = {
number = e.port,
protocol = e.transport,
product = e.product,
version = e.version,
}
tab.addrow(tab_out, e.port, e.transport, e.product or "", e.version or "")
end
return out, tab.dump(tab_out)
else
return "Unable to query data"
end
end
prerule = function ()
if (outFile ~= nil) then
local file = io.open(outFile, "w")
io.output(file)
io.write("IP,Port,Proto,Product,Version\n")
end
if registry.apiKey == "" then
registry.apiKey = nil
end
if not registry.apiKey then
stdnse.verbose1("Error: Please specify your ShodanAPI key with the %s.apikey argument", SCRIPT_NAME)
return false
end
local response = http.get("api.shodan.io", 443, "/api-info?key=" .. registry.apiKey, {any_af=true})
if (response.status ~= 200) then
stdnse.verbose1("Error: Your ShodanAPI key (%s) is invalid", registry.apiKey)
-- Prevent further stages from running
registry.apiKey = nil
return false
end
if arg_target then
local is_ip, err = ipOps.expand_ip(arg_target)
if not is_ip then
stdnse.verbose1("Error: %s.target must be an IP address", SCRIPT_NAME)
return false
end
return true
end
end
generic_action = function(ip)
local resp = lookup_target(ip)
if not resp then return nil end
local out, tabular = format_output(resp)
if type(out) == "string" then
-- some kind of error
return out
end
local result = string.format(
"Report for %s (%s)\n%s",
ip,
table.concat(out.hostnames, ", "),
tabular
)
if (outFile ~= nil) then
for _, port in ipairs(out.ports) do
io.write( string.format("%s,%s,%s,%s,%s\n",
ip, port.number, port.protocol, port.product or "", port.version or "")
)
end
end
return out, result
end
preaction = function()
return generic_action(arg_target)
end
hostrule = function(host)
return registry.apiKey and not ipOps.isPrivate(host.ip)
end
hostaction = function(host)
return generic_action(host.ip)
end
postrule = function ()
return registry.apiKey
end
postaction = function ()
local out = { "Shodan done: ", registry.count, " hosts up." }
if outFile then
io.close()
out[#out+1] = "\nWrote Shodan output to: "
out[#out+1] = outFile
end
return table.concat(out)
end
local ActionsTable = {
-- prerule: scan target from script-args
prerule = preaction,
-- hostrule: look up a host in Shodan
hostrule = hostaction,
-- postrule: report results
postrule = postaction
}
-- execute the action function corresponding to the current rule
action = function(...) return ActionsTable[SCRIPT_TYPE](...) end
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