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server.py
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server.py
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'''
miniprint - a medium interaction printer honeypot
Copyright (C) 2019 Dan Salmon - salmon@protonmail.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 <https://www.gnu.org/licenses/>.
'''
import socketserver
from os.path import isfile, join
import logging
import select
import sys
import traceback
from printer import Printer
import argparse
import re
parser = argparse.ArgumentParser(description='''miniprint - a medium interaction printer honeypot
by Dan Salmon: @BLTjetpack, github.com/sa7mon ''',
prog='miniprint',
usage='%(prog)s [-b,--bind HOST] [-l,--log-file FILE] [-t,--time-out TIME] [-h]',
formatter_class=argparse.RawDescriptionHelpFormatter,
add_help=False)
o = parser.add_argument_group(title='optional arguments',
description='''-b, --bind <host> Bind the server to <host> (default: localhost)
-l, --log-file <file> Save all logs to <file> (default: ./miniprint.log)
-t, --timeout <time> Wait up to <time> seconds for commands before disconnecting client (default: 120)''')
o.add_argument('-b', '--bind', dest='host', default='localhost', help=argparse.SUPPRESS)
o.add_argument("-h", "--help", action="help", help="show this help message and exit")
o.add_argument('-l', '--log-file', dest='log_file', default='./miniprint.log', help=argparse.SUPPRESS)
o.add_argument('-t' ,'--timeout', type=int, dest='timeout', default=120, help=argparse.SUPPRESS)
args = parser.parse_args()
conn_timeout = args.timeout
log_location = args.log_file
logger = logging.getLogger('miniprint')
logger.setLevel(logging.DEBUG)
# create file handler which logs even debug messages
fh = logging.FileHandler(log_location)
fh.setLevel(logging.DEBUG)
# create console handler with a higher log level
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
# create formatter and add it to the handlers
formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
fh.setFormatter(formatter)
ch.setFormatter(formatter)
# add the handlers to the logger
logger.addHandler(fh)
logger.addHandler(ch)
class MyTCPHandler(socketserver.BaseRequestHandler):
"""
The request handler class for our server.
It is instantiated once per connection to the server, and must
override the handle() method to implement communication to the
client.
"""
@staticmethod
def parse_commands(text):
'''
Convert a string of commands to a list of commands. In the case of a print job (no @PJL prefix), append to the list untouched
Examples:
Input: "@PJL USTATUSOFF\r\n@PJL INFO ID\r\n@PJL ECHO DELIMITER58494\r\n\r\n"
Output: ['@PJL USTATUSOFF\r\n', '@PJL INFO ID\r\n', '@PJL ECHO DELIMITER58494\r\n\r\n']
Input: "This is my print job"
Output: ['This is my print job']
'''
commands = []
results = re.split('(@PJL)', text)
results = [x for x in results if x] # In case we have empty list elements
for i, result in enumerate(results):
if result == '@PJL':
continue
elif i > 0 and results[i-1] == '@PJL':
commands.append('@PJL' + results[i])
else:
commands.append(results[i])
return commands
def handle(self):
# self.request is the TCP socket connected to the client
logger.info("handle - open_conn - " + self.client_address[0])
printer = Printer(logger)
emptyRequest = False
while emptyRequest == False:
# Wait a maximum of conn_timeout seconds for another request
# If conn_timeout elapses without request, close the connection
ready = select.select([self.request], [], [], conn_timeout)
if not ready[0]:
break
try:
self.data = self.request.recv(1024).strip()
except Exception as e:
logger.error("handle - receive - Error receiving data - possible port scan")
emptyRequest = True
break
request = self.data.decode('UTF-8')
request = request.replace('\x1b%-12345X', '')
if request[0:2] == '%!':
printer.receiving_postscript = True
printer.postscript_data = request
logger.info('handle - postscript - Received first postscript request of file')
continue
elif printer.receiving_postscript:
printer.postscript_data += request
if '%%EOF' in request:
printer.save_postscript()
printer.receiving_postscript = False
continue
commands = self.parse_commands(request)
logger.debug('handle - request - ' + str(request.encode('UTF-8')))
if len(commands) == 0: # If we're sent an empty request, close the connection
emptyRequest = True
break
try:
response = ''
for command in commands:
command = command.lstrip()
if command.startswith("@PJL "):
command = command[5:]
if printer.printing_raw_job:
printer.save_raw_print_job()
if command.startswith("ECHO"):
response += printer.command_echo(command)
elif command.startswith("USTATUSOFF"):
response += printer.command_ustatusoff(command)
elif command.startswith("INFO ID"):
response += printer.command_info_id(command)
elif command.startswith("INFO STATUS"):
response += printer.command_info_status(command)
elif command.startswith("FSDIRLIST"):
response += printer.command_fsdirlist(command)
elif command.startswith("FSQUERY"):
response += printer.command_fsquery(command)
elif command.startswith("FSMKDIR"):
response += printer.command_fsmkdir(command)
elif command.startswith("FSUPLOAD"):
response += printer.command_fsupload(command)
elif command.startswith("FSDOWNLOAD"):
response += printer.command_fsdownload(command)
elif command.startswith("RDYMSG"):
response += printer.command_rdymsg(command)
else:
logger.error("handle - cmd_unknown - " + str(command))
else:
response += printer.append_raw_print_job(command)
logger.info("handle - response - " + str(response.encode('UTF-8')))
self.request.sendall(response.encode('UTF-8'))
except Exception as e:
tb = sys.exc_info()[2]
traceback.print_tb(tb)
logger.error("handle - error_caught - " + str(e))
if printer.printing_raw_job:
printer.save_raw_print_job()
logger.info("handle - close_conn - " + self.client_address[0])
if __name__ == "__main__":
HOST, PORT = args.host, 9100
socketserver.TCPServer.allow_reuse_address = True
server = socketserver.TCPServer((HOST, PORT), MyTCPHandler)
# Activate the server; this will keep running until you
# interrupt the program with Ctrl-C
server.allow_reuse_address = True
logger.info("main - start - Server started")
server.serve_forever()