##
# $Id$
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'rex/proto/http'
require 'msf/core'


class Metasploit3 < Msf::Auxiliary

	include Msf::Exploit::Remote::HttpClient
	include Msf::Auxiliary::WmapScanDir
	include Msf::Auxiliary::Scanner
	include Msf::Auxiliary::Report

	def initialize(info = {})
		super(update_info(info,
			'Name'   		=> 'HTTP Interesting File Scanner',
			'Description'	=> %q{
				This module identifies the existence of interesting files
				in a given directory path.
			},
			'Author' 		=> [ 'et' ],
			'License'		=> BSD_LICENSE,
			'Version'		=> '$Revision$'))

		register_options(
			[
				OptString.new('PATH', [ true,  "The path  to identify files", '/']),
				OptString.new('EXT', [ false, "Append file extension to use", '']),
				OptPath.new('DICTIONARY',   [ false, "Path of word dictionary to use",
						File.join(Msf::Config.install_root, "data", "wmap", "wmap_files.txt")
					]
				)
			], self.class)

		register_advanced_options(
			[
				OptInt.new('ErrorCode', [ true,  "The expected http code for non existant files", 404]),
				OptPath.new('HTTP404Sigs',   [ false, "Path of 404 signatures to use",
						File.join(Msf::Config.install_root, "data", "wmap", "wmap_404s.txt")
					]
				),
				OptBool.new('NoDetailMessages', [ false, "Do not display detailed test messages", true ]),
				OptInt.new('TestThreads', [ true, "Number of test threads", 25])
			], self.class)

	end

	def run_host(ip)
		extensions = [
			'.null',
			'.backup',
			'.bak',
			'.c',
			'.cfg',
			'.class',
			'.copy',
			'.conf',
			'.exe',
			'.html',
			'.htm',
			'.ini',
			'.log',
			'.old',
			'.orig',
			'.php',
			'.tar',
			'.tar.gz',
			'.tgz',
			'.tmp',
			'.temp',
			'.txt',
			'.zip',
			'~',
			''
		]

		conn = false

		tpath = datastore['PATH']
		if tpath[-1,1] != '/'
			tpath += '/'
		end

		nt = datastore['TestThreads'].to_i
		nt = 1 if nt == 0

		dm = datastore['NoDetailMessages']



		extensions << datastore['EXT']

		extensions.each do |ext|
			queue = []

			File.open(datastore['DICTIONARY'], 'rb').each do |testf|
				queue << testf.strip
			end

			#
			# Detect error code
			#
			ecode = datastore['ErrorCode'].to_i
			begin
				randfile = Rex::Text.rand_text_alpha(5).chomp

				res = send_request_cgi({
					'uri'  		=>  tpath+randfile+ext,
					'method'   	=> 'GET',
					'ctype'		=> 'text/html'
				}, 20)

				return if not res

				tcode = res.code.to_i

				# Look for a string we can signature on as well
				if(tcode >= 200 and tcode <= 299)
					File.open(datastore['HTTP404Sigs'], 'rb').each do |str|
						if(res.body.index(str))
							emesg = str
							break
						end
					end

					if(not emesg)
						print_status("Using first 256 bytes of the response as 404 string for files with extension #{ext}")
						emesg = res.body[0,256]
					else
						print_status("Using custom 404 string of '#{emesg}'")
					end
				else
					ecode = tcode
					print_status("Using code '#{ecode}' as not found for files with extension #{ext}")
				end

			rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
				conn = false
			rescue ::Timeout::Error, ::Errno::EPIPE
			end


			while(not queue.empty?)
				t = []
				1.upto(nt) do
					t << framework.threads.spawn("Module(#{self.refname})-#{rhost}", false, queue.shift) do |testf|
						Thread.current.kill if not testf

						testfext = testf.chomp + ext
						res = send_request_cgi({
							'uri'  		=>  tpath+testfext,
							'method'   	=> 'GET',
							'ctype'		=> 'text/plain'
						}, 20)

						if(not res or ((res.code.to_i == ecode) or (emesg and res.body.index(emesg))))
							if dm == false
								print_status("NOT Found #{wmap_base_url}#{tpath}#{testfext}  #{res.code.to_i}")
								#blah
							end
						else
							if res.code.to_i == 400  and ecode != 400
								print_error("Server returned an error code. #{wmap_base_url}#{tpath}#{testfext} #{res.code.to_i}")
							else
								print_status("Found #{wmap_base_url}#{tpath}#{testfext} #{res.code.to_i}")

								report_web_vuln(
									:host	=> ip,
									:port	=> rport,
									:vhost  => vhost,
									:ssl    => ssl,
									:path	=> "#{tpath}#{testfext}",
									:method => 'GET',
									:pname  => "",
									:proof  => "Res code: #{res.code.to_s}",
									:risk   => 0,
									:confidence   => 100,
									:category     => 'file',
									:description  => 'File found.',
									:name   => 'file'
								)

							end
						end
					end
				end
				t.map{|x| x.join }
			end
		end
	end
end
