#!/usr/bin/env python2
# This file is part of Responder
# Original work by Laurent Gaffie - Trustwave Holdings
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
import re
import sys
import socket
import struct
import string
import logging

from utils import *
from odict import OrderedDict
from packets import SMBHeader, SMBNego, SMBNegoFingerData, SMBSessionFingerData

def OsNameClientVersion(data):
	try:
		length = struct.unpack('<H',data[43:45])[0]
		pack = tuple(data[47+length:].split('\x00\x00\x00'))[:2]
		OsVersion, ClientVersion = tuple([e.replace('\x00','') for e in data[47+length:].split('\x00\x00\x00')[:2]])
		return OsVersion, ClientVersion

	except:
	 	return "Could not fingerprint Os version.", "Could not fingerprint LanManager Client version"

def RunSmbFinger(host):
	try:
		s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		s.connect(host)
		s.settimeout(0.7)

		h = SMBHeader(cmd="\x72",flag1="\x18",flag2="\x53\xc8")
		n = SMBNego(data = SMBNegoFingerData())
		n.calculate()
		
		Packet = str(h)+str(n)
		Buffer = struct.pack(">i", len(''.join(Packet)))+Packet
		s.send(Buffer)
		data = s.recv(2048)
		
		if data[8:10] == "\x72\x00":
			Header = SMBHeader(cmd="\x73",flag1="\x18",flag2="\x17\xc8",uid="\x00\x00")
			Body = SMBSessionFingerData()
			Body.calculate()

			Packet = str(Header)+str(Body)
			Buffer = struct.pack(">i", len(''.join(Packet)))+Packet  

			s.send(Buffer) 
			data = s.recv(2048)

		if data[8:10] == "\x73\x16":
			return OsNameClientVersion(data)
	except:
		settings.Config.AnalyzeLogger.warning("Fingerprint failed for host: {}".format(host))
		return None
