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Added possibility to dump the binary data which is passed through. #26

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Added possibility to dump the binary data which is passed through. #26

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24 changes: 24 additions & 0 deletions mitm_relay.py
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Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,14 @@ def main():
help='Dump SSL (pre-)master secrets to <ssl keylog file>',
default=False)

parser.add_argument('-d', '--dump',
action='store',
metavar='<binary dump file>',
dest='bindumpfile',
type=argparse.FileType('wb'),
help='Dump binary data to <binary dump file>',
default=False)

parser.add_argument('-ct', '--client-timeout',
action='store',
metavar=1.0,
Expand Down Expand Up @@ -144,6 +152,7 @@ def main():
print(color("[!] In UDP, it's not recommended to bind to 127.0.0.1. If you see errors, try to bind to your LAN IP address instead.", 1, 31))

except:
cleanup(cfg)
sys.exit('[!] error: Invalid relay specification, see help.')

if not (cfg.cert and cfg.key):
Expand All @@ -167,6 +176,7 @@ def main():

except Exception as e:
print(color("[!] %s" % str(e), 1, 31))
cleanup(cfg)
sys.exit()

# If a ssl keylog file was specified, dump (pre-)master secrets
Expand All @@ -177,6 +187,7 @@ def main():

except Exception as e:
print(color("[!] %s" % str(e), 1, 31))
cleanup(cfg)
sys.exit()


Expand All @@ -194,6 +205,7 @@ def main():
time.sleep(100)

except KeyboardInterrupt:
cleanup(cfg)
sys.exit("\rExiting...")

class RequestHandler(BaseHTTPRequestHandler):
Expand Down Expand Up @@ -404,10 +416,18 @@ def get_response():
message = new_message

if to_server:
if cfg.bindumpfile:
cfg.bindumpfile.write(message)
cfg.bindumpfile.flush()

msg_str = color(data_repr(message), 0, 93)
print("C >> S [ %s >> %s ] [ %s ] [ %d ] %s %s" % (client_str, server_str, date_str, len(message), modified_str if modified else '', msg_str))

else:
if cfg.bindumpfile:
cfg.bindumpfile.write(message)
cfg.bindumpfile.flush()

msg_str = color(data_repr(message), 0, 33)
print("S >> C [ %s >> %s ] [ %s ] [ %d ] %s %s" % (server_str, client_str, date_str, len(message), modified_str if modified else '', msg_str))

Expand Down Expand Up @@ -449,5 +469,9 @@ def create_server(relay, cfg):
thread = Thread(target=do_relay_udp, args=(serv, (rhost, rport), cfg))
thread.start()

def cleanup(cfg):
if cfg.bindumpfile:
cfg.bindumpfile.close()

if __name__=='__main__':
main()