from binascii import hexlify
from pwn import *

flag = b"flag{this_is_a_test_flag_:D_>.<}"


local = "localhost"
live = "manual.flu.xxx"

with remote(local, 1024) as p:
    for j in range(len(flag)):
        encoded_versions = []
        for i in range(256):
            print(p.recvuntil(b":").decode())
            payload = hexlify(flag[:j]) + f"{i:02x}".encode()  + hexlify(flag[j+1:])
            p.sendline(payload)
            print(p.recvuntil(b":").decode())
            encoded_flag = p.recvn(64).decode()
            encoded_versions.append(encoded_flag)
            print(p.recvuntil(b":").decode())
        p.sendline(b"finish")
        print(p.recvuntil(b":").decode())
        flag_encoded = p.recvn(64).decode()

        for v in encoded_versions:
            print(xor(v, flag_encoded).replace(b"\x00", b" "))