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Current File : //usr/share/nmap/scripts/couchdb-databases.nse
description = [[
Gets database tables from a CouchDB database.

For more info about the CouchDB HTTP API, see 
http://wiki.apache.org/couchdb/HTTP_database_API.
]]

---
-- @usage
-- nmap -p 5984 --script "couchdb-databases.nse" <host>
-- @output
-- PORT      STATE SERVICE REASON
-- 5984/tcp open  unknown syn-ack
-- | couchdb-databases:  
-- |   1 = test_suite_db
-- |   2 = test_suite_db_a
-- |   3 = test_suite_db/with_slashes
-- |   4 = moneyz
-- |   5 = creditcards
-- |   6 = test_suite_users
-- |_  7 = test_suite_db_b

-- version 0.2
-- Created 01/12/2010 - v0.1 - created by Martin Holst Swende <martin@swende.se>

-- TODO : Authentication not implemented

author = "Martin Holst Swende"
license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
categories = {"discovery", "safe"}
require "shortport"
require "http"
require "json"

portrule = shortport.port_or_service({5984})
-- Some lazy shortcuts
local function dbg(str,...)
	stdnse.print_debug("couchdb-get-tables:"..str, unpack(arg))
end

local DISCARD = {}
--- Removes uninteresting data from the table
-- uses the DISCARD table above to see what
-- keys should be omitted from the results
-- @param data a table containg data
--@return another table containing data, with some keys removed
local function queryResultToTable(data)
	local result = {}
	for k,v in pairs(data) do
		dbg("(%s,%s)",k,tostring(v))
		if DISCARD[k] ~= 1 then
			if type(v) == 'table' then
				table.insert(result,k)
				table.insert(result,queryResultToTable(v))
			else
				table.insert(result,(("%s = %s"):format(tostring(k), tostring(v))))
			end
		end
	end
	return result
end

action = function(host, port)
	local data, result, err
	dbg("Requesting all databases")
	data = http.get( host, port, '/_all_dbs' )
	
	-- check that body was received
	if not data.body or data.body == "" then
		local msg = ("%s did not respond with any data."):format(host.targetname or host.ip )
		dbg( msg ) 
		return  msg
	end
	
	-- The html body should look like this : 
	-- ["somedatabase", "anotherdatabase"]
	
	local status, result = json.parse(data.body)
	if not status then
		dbg(result)
		return result
	end
	
	-- Here we know it is a couchdb
	port.version.name ='httpd'
	port.version.product='Apache CouchDB'
	nmap.set_port_version(host,port,'hardmatched')
	
	-- We have a valid table in result containing the parsed json
	-- now, get all the interesting bits		
	
	result = queryResultToTable(result)
	
	return stdnse.format_output(true, result )
end
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