#!/usr/bin/env python3
import hashlib
import sys
from pwn import *

memory = dict()

global i
i= 0

def decode(target) -> int:
    global i
    print("Decoding:\t", target)
    output = memory.get(target, -1)


    while output < 0:
        h = hashlib.sha1(str(i).encode('ascii')).hexdigest()

        memory[ h[-6:] ] = i
        if h.endswith(target):
            output = i
        #print(i, "\t", h, "\t", h[-6:], "\tTarget:", target)
        i += 1
    output = str(str(output)+"\n")
    print("Decoded: ", output)

    return bytes(output, encoding='utf8')


while True:
    p = remote("rabbit.challs.olicyber.it", 10501)
    print(p.recvline())
    print(p.recvline())
    print(p.recvline())

    #Execute: python3 proof.py 9b2d6c
    output = p.recvline()

    print(output)
    hash = str(output)[-9:-3]
    print("\t Hash:", hash)

    key = decode(hash)
    print("\t Key:", key)
    p.sendline(key)

    p.interactive()