tca_prgm3_brute.py

#!/usr/bin/env python3

# Solver for Sakebomb's Digerati’s Atlas Programming3 challenge @ Thotcon 0xA

import socket

HOST = 'irc.thotcon.org'  # The server's hostname or IP address
PORT = 10000        # The port used by the server

def is_english(string):
    words = ['the', 'there', 'some', 'use', 'her', 'than', 'and', 'this', 'would', 'first', 'have', 'each', 'make', 'water', 'from', 'which', 'like', 'been', 'she', 'him', 'call', 'one', 'into', 'who', 'you', 'had', 'how', 'time', 'oil', 'that', 'their', 'has', 'its', 'word', 'look', 'now', 'but', 'will', 'two', 'find', 'was', 'not', 'more', 'long', 'for', 'what', 'other', 'write', 'down', 'all', 'about', 'day', 'are', 'were', 'out', 'see', 'did', 'many', 'number', 'get', 'with', 'when', 'then', 'come', 'his', 'your', 'them', 'way', 'made', 'they', 'can', 'these', 'could', 'may', 'said', 'people', 'part']
    for word in words:
        if ' '+word+' ' in string:
            return True
    return False

def shift(message, key):
    key = -key
    translated = ""

    for symbols in message:
        if symbols.isalpha():
            num = ord(symbols)
            num += key

            if  symbols.isupper():
                if num > ord('Z'):
                    num -= 26
                elif num < ord('A'):
                    num += 26
            elif symbols.islower():
                if num > ord('z'):
                    num -= 26
                elif num < ord('a'):
                    num += 26
            
            translated += chr(num)
        else:
            translated += symbols
    return translated

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    # s.sendall(b'yes')
    data = s.recv(1024)
    print('Received', repr(data))

    if (data == b'Would you like to play a game?\n'):
        s.sendall(b'yes')
    
    data = s.recv(1024)
    print('Received', repr(data))
    s.sendall(b'\n')

    data = s.recv(1024)
    print('Received', repr(data))
    # s.sendall(b'\n')

    for y in range(5):
        author = ""
        for x in range(1, 25):
            print("attempt: " + repr(x))
            shifted = shift(data.decode('utf-8').strip(), x)
            if (is_english(shifted)):
                author = shifted.split('-')[-1] + '\n'
                print(repr(author))
                print('.......\n')
                break

        s.sendall(author.encode('utf-8'))
        data = s.recv(1024)
        data = s.recv(1024)
        print('Recieved', repr(data))


    data = s.recv(1024)
    print('Recieved', repr(data))