http://www.overthewire.org/wargames/vortex/level0.shtml

Level Goal: Your goal is to connect to port 5842 on vortex.labs.pulltheplug.org and read in 4 unsigned integers. Add these integers together and send back the results to get a username and password for level 1. Note: that vortex is on an x86 machine (meaning, a little endian architecture)

소켓 프로그래밍을 통하여 4개의 unsigned int형 숫자를 읽어 모두 더해서 다시 재전송 해주면 다음 레벨 ID와 Password를 보내준다.

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#!/usr/bin/python
import socket, struct

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("vortex.labs.pulltheplug.org", 5842))

sum = 0
for x in range(4):
        data = struct.unpack('<I', s.recv(4))
        sum = sum + data[0]

s.send(struct.pack('<I', sum))
print s.recv(1024)

s.close()

Python으로는 struct 모듈에 대한 이해가 필요하다.

Username: vortex1 Password: Gq#qu3bF3