IceCTF2018-Anticaptcha

Solution

比左個網 , 入面有百尻幾條問題 , 自動解啦咁

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import requests
from bs4 import BeautifulSoup
from math import sqrt; from itertools import count, islice
import gmpy2

def solveQuestion(s):
	if "word in the following line" in s:
		s = s.replace("\n"," ").replace("."," ").replace("  "," ")
		num = int(s.split(" ")[3].replace("th","").replace("st","").replace("nd","").replace("rd",""))
		return s.split(": ")[1].split(" ")[num-1]
	elif "a prime number" in s:
		num = int(s.split(" ")[1])
		return str(gmpy2.is_prime(num)).lower()
	elif "What is the greatest common divisor" in s:
		num1 = int(s.split(" ")[7])
		num2 = int(s.split(" ")[9].replace("?", ""))
		return gmpy2.gcd(num1, num2)
	elif "Which planet is closest to the sun" in s:
		return "Mercury"
	elif "What is the capital of Germany" in s:
		return "Berlin"
	elif "How many planets are between Earth and the Sun?" in s:
		return "2"
	elif "How many strings does a violin have?" in s:
		return "4"
	elif "What is the tallest mountain on Earth?" in s:
		return "Mount Everest"
	elif "What year is it?" in s:
		return "2018"
	elif "What color is the sky?" in s:
		return "Blue"
	elif "Who directed the movie Jaws?" in s:
		return "Steven Spielberg"
	elif "What is the capital of Hawaii?" in s:
		return "Honolulu"
	else:
		print s

s = requests.Session()
content = s.get("https://43xa7xhkaj0cd8c-anticaptcha.labs.icec.tf/").text
soup = BeautifulSoup(content, 'html.parser')

td_tags = soup.find_all("td")
answer = []

for i in range(0, len(td_tags), 2):
	answer.append(str(solveQuestion(td_tags[i].string)))

print s.post("https://43xa7xhkaj0cd8c-anticaptcha.labs.icec.tf/", data={'answer':answer}).text[:2000]