Solver for FLARE's pewpewboat that doesn't require doing reverse-engineering

pwnpewpew.py

#!/usr/bin/env python2

import binascii
import hashlib
import time

# FIXME: why isn't pwntools python 3 already!? Oh I see it's complicated: https://github.com/Gallopsled/pwntools/issues/529
from pwn import *

#context.log_level = 'debug'
p = process('./pewpewboat.exe', stdin=PTY)

def bit_not(n, numbits=8):
    return (1 << numbits) - 1 - n

def submit_grid(solver):

    moves = solver.split(' ')
    for move in moves:
        print "Playing {}".format(move)
        p.sendline(move)
        data = p.recv()
        print data
        time.sleep(0.1) # makes it more dramatic

    if 'NotMd5Hash' in data:
        return data.split('"')[1].replace('\n','')

def solve_hash(chal):

    while True:
        m = hashlib.md5()
        m.update(chal)
        result = binascii.hexlify(bytearray([bit_not(ord(c)) for c in m.digest()])).upper()
        p.sendline(result)
        chal = p.recv()
        print chal
        time.sleep(0.5)
        if 'NotMd5Hash' not in chal:
            p.recv(timeout=1)
            return

p.recv()
# F
hash_challenge = submit_grid("B4 B5 B6 B7 B8 C4 C5 C6 C7 C8 D4 D5 D6 D7 D8 E4 E5 E6 E7 E8 F4 F5 F6 F7 F8 G4")
solve_hash(hash_challenge)

# H
hash_challenge = submit_grid("B4 B5 B6 B7 B8 C4 C5 C8 D4 D5 D6 D7 D8 E4 E5 E6 E7 E8 F4 F5 F6 F7 F8 G4 G8")
solve_hash(hash_challenge)

# G
hash_challenge = submit_grid("A2 A3 A4 A5 A6 A7 A8 B1 B8 C1 C8 D1 E1 E5 E6 E7 E8 F1 F8 G1 H1 H2 H3 H4 H5 H6 H7 G8")
solve_hash(hash_challenge)

# U
hash_challenge = submit_grid("D5 D8 E5 E8 F5 F8 G5 G8 H5 H6 H7 H8")
solve_hash(hash_challenge)

# Z
hash_challenge = submit_grid("B8 E5 F5 D6 C7 B4 B5 B6 B7 F6 F7 F8 F4")
solve_hash(hash_challenge)

# R
hash_challenge = submit_grid("C1 C2 C3 D3 D1 E1 E4 B4 B1 A1 A2 A3")
solve_hash(hash_challenge)

# E
hash_challenge = submit_grid("D5 D6 D7 E5 E7 F5 F6 F7 G5 H5 H6 H7")
solve_hash(hash_challenge)

# J
hash_challenge = submit_grid("B4 B5 B6 C4 B3 B2 D4 E4 F1 G2 G3 F4")
solve_hash(hash_challenge)

# V
hash_challenge = submit_grid("D7 E7 F7 G6 H5 G4 F3 E3 D3")
solve_hash(hash_challenge)

# O
hash_challenge = submit_grid("D3 D4 E2 E5 F2 F5 G2 G5 H3 H4")
solve_hash(hash_challenge)