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checker.py
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checker.py
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#!/usr/bin/env python3
from pwn import *
import checklib
import random
import string
import sys
import os
import json
import re
os.environ["PWNLIB_NOTERM"] = "1"
context.timeout = 5
context.log_level = "error"
data = checklib.get_data()
action = data['action']
port = 5000
service_name = 'Polls'
team_id = data['teamId']
team_addr = '10.60.' + team_id + '.1'
# team_addr = "localhost"
def get_random_string(n, alph=string.ascii_letters+string.digits):
return ''.join([random.choice(alph) for _ in range(n)])
def check_sla():
try:
r = remote(team_addr, port)
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot connect", str(e))
user = get_random_string(random.randint(10, 16))
password = get_random_string(random.randint(10, 16))
description = get_random_string(random.randint(10, 20))
n_options = random.randint(3, 7)
options = [get_random_string(random.randint(5, 10))
for _ in range(n_options)]
try:
r.recvuntil(b": ")
r.sendline(b"register")
r.recvuntil(b": ")
r.sendline(user.encode())
r.recvuntil(b": ")
r.sendline(password.encode())
assert b"User registered correctly!" in r.recvline()
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot register", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"create poll")
r.recvuntil(b": ")
r.sendline(description.encode())
r.recvuntil(b": ")
r.sendline(str(n_options).encode())
for i in range(n_options):
r.recvuntil(b": ")
r.sendline(options[i].encode())
resp = r.recvline()
poll_id = resp.split()[-1].decode()
assert b"Poll created!" in resp
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot create poll", str(e))
r.close()
try:
r = remote(team_addr, port)
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot connect", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"login")
r.recvuntil(b": ")
r.sendline(user.encode())
r.recvuntil(b": ")
r.sendline(password.encode())
assert b"Successfully logged in!" in r.recvline()
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot login", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"access poll")
resp = r.recvuntil(b": ")
poll_id = re.findall(b"[0-9a-f]{16}", resp)[0]
r.sendline(b"show")
r.recvuntil(b": ")
r.sendline(poll_id)
assert description.encode() in r.recvuntil(
b": ").replace(b" ", b"").replace(b"\n", b"")
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot access poll", str(e))
r.close()
try:
r = remote(team_addr, port)
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot connect", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"login")
r.recvuntil(b": ")
r.sendline(user.encode())
r.recvuntil(b": ")
r.sendline(password.encode())
assert b"Successfully logged in!" in r.recvline()
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot login", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"access poll")
resp = r.recvuntil(b": ")
poll_id = re.findall(b"[0-9a-f]{16}", resp)[0]
r.sendline(b"share")
r.recvuntil(b": ")
r.sendline(poll_id)
token = r.recvline().split()[-1].decode()
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot share poll", str(e))
r.close()
user = get_random_string(random.randint(10, 16))
password = get_random_string(random.randint(10, 16))
try:
r = remote(team_addr, port)
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot connect", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"register")
r.recvuntil(b": ")
r.sendline(user.encode())
r.recvuntil(b": ")
r.sendline(password.encode())
assert b"User registered correctly!" in r.recvline()
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot register", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"use token")
resp = r.recvuntil(b": ")
r.sendline(token.encode())
assert b"OK" in r.recvline()
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot use sharing token", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"access poll")
resp = r.recvuntil(b": ")
poll_id = re.findall(b"[0-9a-f]{16}", resp)[0]
r.sendline(b"show")
r.recvuntil(b": ")
r.sendline(poll_id)
assert description.encode() in r.recvuntil(
b": ").replace(b" ", b"").replace(b"\n", b"")
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot access poll", str(e))
checklib.quit(checklib.Status.OK)
def put_flag():
flag = data['flag']
random.seed(flag)
try:
r = remote(team_addr, port)
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot connect", str(e))
user = get_random_string(random.randint(10, 16))
password = get_random_string(random.randint(10, 16))
n_options = random.randint(3, 7)
options = [get_random_string(random.randint(5, 10))
for _ in range(n_options)]
try:
r.recvuntil(b": ")
r.sendline(b"register")
r.recvuntil(b": ")
r.sendline(user.encode())
r.recvuntil(b": ")
r.sendline(password.encode())
assert b"User registered correctly!" in r.recvline()
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot register", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"create poll")
r.recvuntil(b": ")
r.sendline(flag.encode())
r.recvuntil(b": ")
r.sendline(str(n_options).encode())
for i in range(n_options):
r.recvuntil(b": ")
r.sendline(options[i].encode())
resp = r.recvline()
poll_id = resp.split()[-1].decode()
assert b"Poll created!" in resp
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot create poll", str(e))
try:
checklib.post_flag_id(service_name, team_addr, json.dumps(
{"poll_id": poll_id, "username": user}))
except Exception as e:
checklib.quit(checklib.Status.ERROR, "Checker error", str(e))
checklib.quit(checklib.Status.OK)
def get_flag():
flag = data['flag']
random.seed(flag)
try:
r = remote(team_addr, port)
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot connect", str(e))
user = get_random_string(random.randint(10, 16))
password = get_random_string(random.randint(10, 16))
try:
r.recvuntil(b": ")
r.sendline(b"login")
r.recvuntil(b": ")
r.sendline(user.encode())
r.recvuntil(b": ")
r.sendline(password.encode())
assert b"Successfully logged in!" in r.recvline()
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot login", str(e))
try:
r.recvuntil(b": ")
r.sendline(b"access poll")
resp = r.recvuntil(b": ")
poll_id = re.findall(b"[0-9a-f]{16}", resp)[0]
r.sendline(b"show")
r.recvuntil(b": ")
r.sendline(poll_id)
assert flag.encode() in r.recvuntil(b": ").replace(b" ", b"").replace(b"\n", b"")
except Exception as e:
checklib.quit(checklib.Status.DOWN, "Cannot access poll", str(e))
checklib.quit(checklib.Status.OK)
def main():
if action == checklib.Action.CHECK_SLA.name:
check_sla()
elif action == checklib.Action.PUT_FLAG.name:
put_flag()
elif action == checklib.Action.GET_FLAG.name:
get_flag()
if __name__ == "__main__":
main()